ulan@chromium.org | 2efb900 | 2012-01-19 15:36:35 +0000 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #include "v8.h" |
| 29 | |
| 30 | #include "accessors.h" |
| 31 | #include "api.h" |
| 32 | #include "bootstrapper.h" |
karlklose@chromium.org | 44bc708 | 2011-04-11 12:33:05 +0000 | [diff] [blame] | 33 | #include "codegen.h" |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 34 | #include "compilation-cache.h" |
machenbach@chromium.org | c1789ee | 2013-07-05 07:09:57 +0000 | [diff] [blame] | 35 | #include "cpu-profiler.h" |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 36 | #include "debug.h" |
ricow@chromium.org | 4f693d6 | 2011-07-04 14:01:31 +0000 | [diff] [blame] | 37 | #include "deoptimizer.h" |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 38 | #include "global-handles.h" |
fschneider@chromium.org | fb144a0 | 2011-05-04 12:43:48 +0000 | [diff] [blame] | 39 | #include "heap-profiler.h" |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 40 | #include "incremental-marking.h" |
hpayer@chromium.org | c5d4971 | 2013-09-11 08:25:48 +0000 | [diff] [blame] | 41 | #include "isolate-inl.h" |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 42 | #include "mark-compact.h" |
| 43 | #include "natives.h" |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 44 | #include "objects-visiting.h" |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 45 | #include "objects-visiting-inl.h" |
fschneider@chromium.org | 7d10be5 | 2012-04-10 12:30:14 +0000 | [diff] [blame] | 46 | #include "once.h" |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 47 | #include "runtime-profiler.h" |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 48 | #include "scopeinfo.h" |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 49 | #include "snapshot.h" |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 50 | #include "store-buffer.h" |
hpayer@chromium.org | c5d4971 | 2013-09-11 08:25:48 +0000 | [diff] [blame] | 51 | #include "utils/random-number-generator.h" |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 52 | #include "v8threads.h" |
ulan@chromium.org | 56c14af | 2012-09-20 12:51:09 +0000 | [diff] [blame] | 53 | #include "v8utils.h" |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 54 | #include "vm-state-inl.h" |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 55 | #if V8_TARGET_ARCH_ARM && !V8_INTERPRETED_REGEXP |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 56 | #include "regexp-macro-assembler.h" |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 57 | #include "arm/regexp-macro-assembler-arm.h" |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 58 | #endif |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 59 | #if V8_TARGET_ARCH_MIPS && !V8_INTERPRETED_REGEXP |
| 60 | #include "regexp-macro-assembler.h" |
| 61 | #include "mips/regexp-macro-assembler-mips.h" |
| 62 | #endif |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 63 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 64 | namespace v8 { |
| 65 | namespace internal { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 66 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 67 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 68 | Heap::Heap() |
| 69 | : isolate_(NULL), |
machenbach@chromium.org | cfdf67d | 2013-09-27 07:27:26 +0000 | [diff] [blame] | 70 | code_range_size_(kIs64BitArch ? 512 * MB : 0), |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 71 | // semispace_size_ should be a power of 2 and old_generation_size_ should be |
| 72 | // a multiple of Page::kPageSize. |
machenbach@chromium.org | cfdf67d | 2013-09-27 07:27:26 +0000 | [diff] [blame] | 73 | reserved_semispace_size_(8 * (kPointerSize / 4) * MB), |
| 74 | max_semispace_size_(8 * (kPointerSize / 4) * MB), |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 75 | initial_semispace_size_(Page::kPageSize), |
machenbach@chromium.org | cfdf67d | 2013-09-27 07:27:26 +0000 | [diff] [blame] | 76 | max_old_generation_size_(700ul * (kPointerSize / 4) * MB), |
| 77 | max_executable_size_(256ul * (kPointerSize / 4) * MB), |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 78 | // Variables set based on semispace_size_ and old_generation_size_ in |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 79 | // ConfigureHeap (survived_since_last_expansion_, external_allocation_limit_) |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 80 | // Will be 4 * reserved_semispace_size_ to ensure that young |
| 81 | // generation can be aligned to its size. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 82 | survived_since_last_expansion_(0), |
jkummerow@chromium.org | ddda9e8 | 2011-07-06 11:27:02 +0000 | [diff] [blame] | 83 | sweep_generation_(0), |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 84 | always_allocate_scope_depth_(0), |
| 85 | linear_allocation_scope_depth_(0), |
| 86 | contexts_disposed_(0), |
danno@chromium.org | 88aa058 | 2012-03-23 15:11:57 +0000 | [diff] [blame] | 87 | global_ic_age_(0), |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 88 | flush_monomorphic_ics_(false), |
jkummerow@chromium.org | d8a3a14 | 2013-10-03 12:15:05 +0000 | [diff] [blame] | 89 | allocation_mementos_found_(0), |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 90 | scan_on_scavenge_pages_(0), |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 91 | new_space_(this), |
| 92 | old_pointer_space_(NULL), |
| 93 | old_data_space_(NULL), |
| 94 | code_space_(NULL), |
| 95 | map_space_(NULL), |
| 96 | cell_space_(NULL), |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 97 | property_cell_space_(NULL), |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 98 | lo_space_(NULL), |
| 99 | gc_state_(NOT_IN_GC), |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 100 | gc_post_processing_depth_(0), |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 101 | ms_count_(0), |
| 102 | gc_count_(0), |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 103 | remembered_unmapped_pages_index_(0), |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 104 | unflattened_strings_length_(0), |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 105 | #ifdef DEBUG |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 106 | allocation_timeout_(0), |
| 107 | disallow_allocation_failure_(false), |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 108 | #endif // DEBUG |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 109 | new_space_high_promotion_mode_active_(false), |
svenpanne@chromium.org | a53e8e0 | 2013-05-24 12:35:50 +0000 | [diff] [blame] | 110 | old_generation_allocation_limit_(kMinimumOldGenerationAllocationLimit), |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 111 | size_of_old_gen_at_last_old_space_gc_(0), |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 112 | external_allocation_limit_(0), |
| 113 | amount_of_external_allocated_memory_(0), |
| 114 | amount_of_external_allocated_memory_at_last_global_gc_(0), |
| 115 | old_gen_exhausted_(false), |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 116 | store_buffer_rebuilder_(store_buffer()), |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 117 | hidden_string_(NULL), |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 118 | gc_safe_size_of_old_object_(NULL), |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 119 | total_regexp_code_generated_(0), |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 120 | tracer_(NULL), |
| 121 | young_survivors_after_last_gc_(0), |
| 122 | high_survival_rate_period_length_(0), |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 123 | low_survival_rate_period_length_(0), |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 124 | survival_rate_(0), |
| 125 | previous_survival_rate_trend_(Heap::STABLE), |
| 126 | survival_rate_trend_(Heap::STABLE), |
yangguo@chromium.org | c03a192 | 2013-02-19 13:55:47 +0000 | [diff] [blame] | 127 | max_gc_pause_(0.0), |
| 128 | total_gc_time_ms_(0.0), |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 129 | max_alive_after_gc_(0), |
| 130 | min_in_mutator_(kMaxInt), |
| 131 | alive_after_last_gc_(0), |
| 132 | last_gc_end_timestamp_(0.0), |
mstarzinger@chromium.org | e3b8d0f | 2013-02-01 09:06:41 +0000 | [diff] [blame] | 133 | marking_time_(0.0), |
| 134 | sweeping_time_(0.0), |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 135 | store_buffer_(this), |
| 136 | marking_(this), |
| 137 | incremental_marking_(this), |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 138 | number_idle_notifications_(0), |
| 139 | last_idle_notification_gc_count_(0), |
| 140 | last_idle_notification_gc_count_init_(false), |
svenpanne@chromium.org | ecb9dd6 | 2011-12-01 08:22:35 +0000 | [diff] [blame] | 141 | mark_sweeps_since_idle_round_started_(0), |
svenpanne@chromium.org | ecb9dd6 | 2011-12-01 08:22:35 +0000 | [diff] [blame] | 142 | gc_count_at_last_idle_gc_(0), |
| 143 | scavenges_since_last_idle_round_(kIdleScavengeThreshold), |
mstarzinger@chromium.org | a2e1a40 | 2013-10-15 08:25:05 +0000 | [diff] [blame] | 144 | full_codegen_bytes_generated_(0), |
| 145 | crankshaft_codegen_bytes_generated_(0), |
ulan@chromium.org | 32d7dba | 2013-04-24 10:59:06 +0000 | [diff] [blame] | 146 | gcs_since_last_deopt_(0), |
danno@chromium.org | 94b0d6f | 2013-02-04 13:33:20 +0000 | [diff] [blame] | 147 | #ifdef VERIFY_HEAP |
jkummerow@chromium.org | 25b0e21 | 2013-10-04 15:38:52 +0000 | [diff] [blame] | 148 | no_weak_object_verification_scope_depth_(0), |
danno@chromium.org | 94b0d6f | 2013-02-04 13:33:20 +0000 | [diff] [blame] | 149 | #endif |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 150 | promotion_queue_(this), |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 151 | configured_(false), |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 152 | chunks_queued_for_free_(NULL), |
| 153 | relocation_mutex_(NULL) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 154 | // Allow build-time customization of the max semispace size. Building |
| 155 | // V8 with snapshots and a non-default max semispace size is much |
| 156 | // easier if you can define it as part of the build environment. |
| 157 | #if defined(V8_MAX_SEMISPACE_SIZE) |
| 158 | max_semispace_size_ = reserved_semispace_size_ = V8_MAX_SEMISPACE_SIZE; |
| 159 | #endif |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 160 | |
machenbach@chromium.org | cfdf67d | 2013-09-27 07:27:26 +0000 | [diff] [blame] | 161 | // Ensure old_generation_size_ is a multiple of kPageSize. |
| 162 | ASSERT(MB >= Page::kPageSize); |
| 163 | |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 164 | intptr_t max_virtual = OS::MaxVirtualMemory(); |
| 165 | |
| 166 | if (max_virtual > 0) { |
| 167 | if (code_range_size_ > 0) { |
| 168 | // Reserve no more than 1/8 of the memory for the code range. |
| 169 | code_range_size_ = Min(code_range_size_, max_virtual >> 3); |
| 170 | } |
| 171 | } |
| 172 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 173 | memset(roots_, 0, sizeof(roots_[0]) * kRootListLength); |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 174 | native_contexts_list_ = NULL; |
danno@chromium.org | 1fd77d5 | 2013-06-07 16:01:45 +0000 | [diff] [blame] | 175 | array_buffers_list_ = Smi::FromInt(0); |
jkummerow@chromium.org | ba72ec8 | 2013-07-22 09:21:20 +0000 | [diff] [blame] | 176 | allocation_sites_list_ = Smi::FromInt(0); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 177 | mark_compact_collector_.heap_ = this; |
| 178 | external_string_table_.heap_ = this; |
yangguo@chromium.org | cb9affa | 2012-05-15 12:16:38 +0000 | [diff] [blame] | 179 | // Put a dummy entry in the remembered pages so we can find the list the |
| 180 | // minidump even if there are no real unmapped pages. |
| 181 | RememberUnmappedPage(NULL, false); |
jkummerow@chromium.org | 28583c9 | 2012-07-16 11:31:55 +0000 | [diff] [blame] | 182 | |
| 183 | ClearObjectStats(true); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 184 | } |
| 185 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 186 | |
kmillikin@chromium.org | f05f291 | 2010-09-30 10:07:24 +0000 | [diff] [blame] | 187 | intptr_t Heap::Capacity() { |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 188 | if (!HasBeenSetUp()) return 0; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 189 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 190 | return new_space_.Capacity() + |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 191 | old_pointer_space_->Capacity() + |
| 192 | old_data_space_->Capacity() + |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 193 | code_space_->Capacity() + |
kasperl@chromium.org | defbd10 | 2009-07-13 14:04:26 +0000 | [diff] [blame] | 194 | map_space_->Capacity() + |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 195 | cell_space_->Capacity() + |
| 196 | property_cell_space_->Capacity(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 197 | } |
| 198 | |
| 199 | |
kmillikin@chromium.org | f05f291 | 2010-09-30 10:07:24 +0000 | [diff] [blame] | 200 | intptr_t Heap::CommittedMemory() { |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 201 | if (!HasBeenSetUp()) return 0; |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 202 | |
| 203 | return new_space_.CommittedMemory() + |
| 204 | old_pointer_space_->CommittedMemory() + |
| 205 | old_data_space_->CommittedMemory() + |
| 206 | code_space_->CommittedMemory() + |
| 207 | map_space_->CommittedMemory() + |
| 208 | cell_space_->CommittedMemory() + |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 209 | property_cell_space_->CommittedMemory() + |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 210 | lo_space_->Size(); |
| 211 | } |
| 212 | |
danno@chromium.org | 72204d5 | 2012-10-31 10:02:10 +0000 | [diff] [blame] | 213 | |
| 214 | size_t Heap::CommittedPhysicalMemory() { |
| 215 | if (!HasBeenSetUp()) return 0; |
| 216 | |
| 217 | return new_space_.CommittedPhysicalMemory() + |
| 218 | old_pointer_space_->CommittedPhysicalMemory() + |
| 219 | old_data_space_->CommittedPhysicalMemory() + |
| 220 | code_space_->CommittedPhysicalMemory() + |
| 221 | map_space_->CommittedPhysicalMemory() + |
| 222 | cell_space_->CommittedPhysicalMemory() + |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 223 | property_cell_space_->CommittedPhysicalMemory() + |
danno@chromium.org | 72204d5 | 2012-10-31 10:02:10 +0000 | [diff] [blame] | 224 | lo_space_->CommittedPhysicalMemory(); |
| 225 | } |
| 226 | |
| 227 | |
ager@chromium.org | 01fe7df | 2010-11-10 11:59:11 +0000 | [diff] [blame] | 228 | intptr_t Heap::CommittedMemoryExecutable() { |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 229 | if (!HasBeenSetUp()) return 0; |
ager@chromium.org | 01fe7df | 2010-11-10 11:59:11 +0000 | [diff] [blame] | 230 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 231 | return isolate()->memory_allocator()->SizeExecutable(); |
ager@chromium.org | 01fe7df | 2010-11-10 11:59:11 +0000 | [diff] [blame] | 232 | } |
| 233 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 234 | |
kmillikin@chromium.org | f05f291 | 2010-09-30 10:07:24 +0000 | [diff] [blame] | 235 | intptr_t Heap::Available() { |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 236 | if (!HasBeenSetUp()) return 0; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 237 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 238 | return new_space_.Available() + |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 239 | old_pointer_space_->Available() + |
| 240 | old_data_space_->Available() + |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 241 | code_space_->Available() + |
kasperl@chromium.org | defbd10 | 2009-07-13 14:04:26 +0000 | [diff] [blame] | 242 | map_space_->Available() + |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 243 | cell_space_->Available() + |
| 244 | property_cell_space_->Available(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 245 | } |
| 246 | |
| 247 | |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 248 | bool Heap::HasBeenSetUp() { |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 249 | return old_pointer_space_ != NULL && |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 250 | old_data_space_ != NULL && |
| 251 | code_space_ != NULL && |
| 252 | map_space_ != NULL && |
kasperl@chromium.org | defbd10 | 2009-07-13 14:04:26 +0000 | [diff] [blame] | 253 | cell_space_ != NULL && |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 254 | property_cell_space_ != NULL && |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 255 | lo_space_ != NULL; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 256 | } |
| 257 | |
| 258 | |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 259 | int Heap::GcSafeSizeOfOldObject(HeapObject* object) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 260 | if (IntrusiveMarking::IsMarked(object)) { |
| 261 | return IntrusiveMarking::SizeOfMarkedObject(object); |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 262 | } |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 263 | return object->SizeFromMap(object->map()); |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 264 | } |
| 265 | |
| 266 | |
rossberg@chromium.org | 994edf6 | 2012-02-06 10:12:55 +0000 | [diff] [blame] | 267 | GarbageCollector Heap::SelectGarbageCollector(AllocationSpace space, |
| 268 | const char** reason) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 269 | // Is global GC requested? |
yangguo@chromium.org | efdb9d7 | 2012-04-26 08:21:05 +0000 | [diff] [blame] | 270 | if (space != NEW_SPACE) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 271 | isolate_->counters()->gc_compactor_caused_by_request()->Increment(); |
rossberg@chromium.org | 994edf6 | 2012-02-06 10:12:55 +0000 | [diff] [blame] | 272 | *reason = "GC in old space requested"; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 273 | return MARK_COMPACTOR; |
| 274 | } |
| 275 | |
yangguo@chromium.org | efdb9d7 | 2012-04-26 08:21:05 +0000 | [diff] [blame] | 276 | if (FLAG_gc_global || (FLAG_stress_compaction && (gc_count_ & 1) != 0)) { |
| 277 | *reason = "GC in old space forced by flags"; |
| 278 | return MARK_COMPACTOR; |
| 279 | } |
| 280 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 281 | // Is enough data promoted to justify a global GC? |
svenpanne@chromium.org | a53e8e0 | 2013-05-24 12:35:50 +0000 | [diff] [blame] | 282 | if (OldGenerationAllocationLimitReached()) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 283 | isolate_->counters()->gc_compactor_caused_by_promoted_data()->Increment(); |
rossberg@chromium.org | 994edf6 | 2012-02-06 10:12:55 +0000 | [diff] [blame] | 284 | *reason = "promotion limit reached"; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 285 | return MARK_COMPACTOR; |
| 286 | } |
| 287 | |
| 288 | // Have allocation in OLD and LO failed? |
| 289 | if (old_gen_exhausted_) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 290 | isolate_->counters()-> |
| 291 | gc_compactor_caused_by_oldspace_exhaustion()->Increment(); |
rossberg@chromium.org | 994edf6 | 2012-02-06 10:12:55 +0000 | [diff] [blame] | 292 | *reason = "old generations exhausted"; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 293 | return MARK_COMPACTOR; |
| 294 | } |
| 295 | |
| 296 | // Is there enough space left in OLD to guarantee that a scavenge can |
| 297 | // succeed? |
| 298 | // |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 299 | // Note that MemoryAllocator->MaxAvailable() undercounts the memory available |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 300 | // for object promotion. It counts only the bytes that the memory |
| 301 | // allocator has not yet allocated from the OS and assigned to any space, |
| 302 | // and does not count available bytes already in the old space or code |
| 303 | // space. Undercounting is safe---we may get an unrequested full GC when |
| 304 | // a scavenge would have succeeded. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 305 | if (isolate_->memory_allocator()->MaxAvailable() <= new_space_.Size()) { |
| 306 | isolate_->counters()-> |
| 307 | gc_compactor_caused_by_oldspace_exhaustion()->Increment(); |
rossberg@chromium.org | 994edf6 | 2012-02-06 10:12:55 +0000 | [diff] [blame] | 308 | *reason = "scavenge might not succeed"; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 309 | return MARK_COMPACTOR; |
| 310 | } |
| 311 | |
| 312 | // Default |
rossberg@chromium.org | 994edf6 | 2012-02-06 10:12:55 +0000 | [diff] [blame] | 313 | *reason = NULL; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 314 | return SCAVENGER; |
| 315 | } |
| 316 | |
| 317 | |
| 318 | // TODO(1238405): Combine the infrastructure for --heap-stats and |
| 319 | // --log-gc to avoid the complicated preprocessor and flag testing. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 320 | void Heap::ReportStatisticsBeforeGC() { |
| 321 | // Heap::ReportHeapStatistics will also log NewSpace statistics when |
whesse@chromium.org | 030d38e | 2011-07-13 13:23:34 +0000 | [diff] [blame] | 322 | // compiled --log-gc is set. The following logic is used to avoid |
| 323 | // double logging. |
| 324 | #ifdef DEBUG |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 325 | if (FLAG_heap_stats || FLAG_log_gc) new_space_.CollectStatistics(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 326 | if (FLAG_heap_stats) { |
| 327 | ReportHeapStatistics("Before GC"); |
| 328 | } else if (FLAG_log_gc) { |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 329 | new_space_.ReportStatistics(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 330 | } |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 331 | if (FLAG_heap_stats || FLAG_log_gc) new_space_.ClearHistograms(); |
whesse@chromium.org | 030d38e | 2011-07-13 13:23:34 +0000 | [diff] [blame] | 332 | #else |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 333 | if (FLAG_log_gc) { |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 334 | new_space_.CollectStatistics(); |
| 335 | new_space_.ReportStatistics(); |
| 336 | new_space_.ClearHistograms(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 337 | } |
whesse@chromium.org | 030d38e | 2011-07-13 13:23:34 +0000 | [diff] [blame] | 338 | #endif // DEBUG |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 339 | } |
| 340 | |
| 341 | |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 342 | void Heap::PrintShortHeapStatistics() { |
| 343 | if (!FLAG_trace_gc_verbose) return; |
rossberg@chromium.org | 657d53b | 2012-07-12 11:06:03 +0000 | [diff] [blame] | 344 | PrintPID("Memory allocator, used: %6" V8_PTR_PREFIX "d KB" |
| 345 | ", available: %6" V8_PTR_PREFIX "d KB\n", |
| 346 | isolate_->memory_allocator()->Size() / KB, |
| 347 | isolate_->memory_allocator()->Available() / KB); |
| 348 | PrintPID("New space, used: %6" V8_PTR_PREFIX "d KB" |
| 349 | ", available: %6" V8_PTR_PREFIX "d KB" |
| 350 | ", committed: %6" V8_PTR_PREFIX "d KB\n", |
| 351 | new_space_.Size() / KB, |
| 352 | new_space_.Available() / KB, |
| 353 | new_space_.CommittedMemory() / KB); |
| 354 | PrintPID("Old pointers, used: %6" V8_PTR_PREFIX "d KB" |
| 355 | ", available: %6" V8_PTR_PREFIX "d KB" |
| 356 | ", committed: %6" V8_PTR_PREFIX "d KB\n", |
| 357 | old_pointer_space_->SizeOfObjects() / KB, |
| 358 | old_pointer_space_->Available() / KB, |
| 359 | old_pointer_space_->CommittedMemory() / KB); |
| 360 | PrintPID("Old data space, used: %6" V8_PTR_PREFIX "d KB" |
| 361 | ", available: %6" V8_PTR_PREFIX "d KB" |
| 362 | ", committed: %6" V8_PTR_PREFIX "d KB\n", |
| 363 | old_data_space_->SizeOfObjects() / KB, |
| 364 | old_data_space_->Available() / KB, |
| 365 | old_data_space_->CommittedMemory() / KB); |
| 366 | PrintPID("Code space, used: %6" V8_PTR_PREFIX "d KB" |
| 367 | ", available: %6" V8_PTR_PREFIX "d KB" |
| 368 | ", committed: %6" V8_PTR_PREFIX "d KB\n", |
| 369 | code_space_->SizeOfObjects() / KB, |
| 370 | code_space_->Available() / KB, |
| 371 | code_space_->CommittedMemory() / KB); |
| 372 | PrintPID("Map space, used: %6" V8_PTR_PREFIX "d KB" |
| 373 | ", available: %6" V8_PTR_PREFIX "d KB" |
| 374 | ", committed: %6" V8_PTR_PREFIX "d KB\n", |
| 375 | map_space_->SizeOfObjects() / KB, |
| 376 | map_space_->Available() / KB, |
| 377 | map_space_->CommittedMemory() / KB); |
| 378 | PrintPID("Cell space, used: %6" V8_PTR_PREFIX "d KB" |
| 379 | ", available: %6" V8_PTR_PREFIX "d KB" |
| 380 | ", committed: %6" V8_PTR_PREFIX "d KB\n", |
| 381 | cell_space_->SizeOfObjects() / KB, |
| 382 | cell_space_->Available() / KB, |
| 383 | cell_space_->CommittedMemory() / KB); |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 384 | PrintPID("PropertyCell space, used: %6" V8_PTR_PREFIX "d KB" |
| 385 | ", available: %6" V8_PTR_PREFIX "d KB" |
| 386 | ", committed: %6" V8_PTR_PREFIX "d KB\n", |
| 387 | property_cell_space_->SizeOfObjects() / KB, |
| 388 | property_cell_space_->Available() / KB, |
| 389 | property_cell_space_->CommittedMemory() / KB); |
rossberg@chromium.org | 657d53b | 2012-07-12 11:06:03 +0000 | [diff] [blame] | 390 | PrintPID("Large object space, used: %6" V8_PTR_PREFIX "d KB" |
| 391 | ", available: %6" V8_PTR_PREFIX "d KB" |
| 392 | ", committed: %6" V8_PTR_PREFIX "d KB\n", |
| 393 | lo_space_->SizeOfObjects() / KB, |
| 394 | lo_space_->Available() / KB, |
| 395 | lo_space_->CommittedMemory() / KB); |
verwaest@chromium.org | 33e09c8 | 2012-10-10 17:07:22 +0000 | [diff] [blame] | 396 | PrintPID("All spaces, used: %6" V8_PTR_PREFIX "d KB" |
| 397 | ", available: %6" V8_PTR_PREFIX "d KB" |
| 398 | ", committed: %6" V8_PTR_PREFIX "d KB\n", |
| 399 | this->SizeOfObjects() / KB, |
| 400 | this->Available() / KB, |
| 401 | this->CommittedMemory() / KB); |
danno@chromium.org | f95d4b9 | 2013-06-13 14:40:17 +0000 | [diff] [blame] | 402 | PrintPID("External memory reported: %6" V8_PTR_PREFIX "d KB\n", |
| 403 | amount_of_external_allocated_memory_ / KB); |
yangguo@chromium.org | c03a192 | 2013-02-19 13:55:47 +0000 | [diff] [blame] | 404 | PrintPID("Total time spent in GC : %.1f ms\n", total_gc_time_ms_); |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 405 | } |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 406 | |
| 407 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 408 | // TODO(1238405): Combine the infrastructure for --heap-stats and |
| 409 | // --log-gc to avoid the complicated preprocessor and flag testing. |
| 410 | void Heap::ReportStatisticsAfterGC() { |
| 411 | // Similar to the before GC, we use some complicated logic to ensure that |
| 412 | // NewSpace statistics are logged exactly once when --log-gc is turned on. |
whesse@chromium.org | 030d38e | 2011-07-13 13:23:34 +0000 | [diff] [blame] | 413 | #if defined(DEBUG) |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 414 | if (FLAG_heap_stats) { |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 415 | new_space_.CollectStatistics(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 416 | ReportHeapStatistics("After GC"); |
| 417 | } else if (FLAG_log_gc) { |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 418 | new_space_.ReportStatistics(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 419 | } |
whesse@chromium.org | 030d38e | 2011-07-13 13:23:34 +0000 | [diff] [blame] | 420 | #else |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 421 | if (FLAG_log_gc) new_space_.ReportStatistics(); |
whesse@chromium.org | 030d38e | 2011-07-13 13:23:34 +0000 | [diff] [blame] | 422 | #endif // DEBUG |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 423 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 424 | |
| 425 | |
| 426 | void Heap::GarbageCollectionPrologue() { |
rossberg@chromium.org | 79e7902 | 2013-06-03 15:43:46 +0000 | [diff] [blame] | 427 | { AllowHeapAllocation for_the_first_part_of_prologue; |
| 428 | isolate_->transcendental_cache()->Clear(); |
| 429 | ClearJSFunctionResultCaches(); |
| 430 | gc_count_++; |
| 431 | unflattened_strings_length_ = 0; |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 432 | |
rossberg@chromium.org | 79e7902 | 2013-06-03 15:43:46 +0000 | [diff] [blame] | 433 | if (FLAG_flush_code && FLAG_flush_code_incrementally) { |
| 434 | mark_compact_collector()->EnableCodeFlushing(true); |
| 435 | } |
verwaest@chromium.org | e4ee6de | 2012-11-06 12:13:00 +0000 | [diff] [blame] | 436 | |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 437 | #ifdef VERIFY_HEAP |
rossberg@chromium.org | 79e7902 | 2013-06-03 15:43:46 +0000 | [diff] [blame] | 438 | if (FLAG_verify_heap) { |
| 439 | Verify(); |
| 440 | } |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 441 | #endif |
rossberg@chromium.org | 79e7902 | 2013-06-03 15:43:46 +0000 | [diff] [blame] | 442 | } |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 443 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 444 | #ifdef DEBUG |
rossberg@chromium.org | 79e7902 | 2013-06-03 15:43:46 +0000 | [diff] [blame] | 445 | ASSERT(!AllowHeapAllocation::IsAllowed() && gc_state_ == NOT_IN_GC); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 446 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 447 | if (FLAG_gc_verbose) Print(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 448 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 449 | ReportStatisticsBeforeGC(); |
whesse@chromium.org | 030d38e | 2011-07-13 13:23:34 +0000 | [diff] [blame] | 450 | #endif // DEBUG |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 451 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 452 | store_buffer()->GCPrologue(); |
mstarzinger@chromium.org | 2ed0d02 | 2013-10-17 08:06:21 +0000 | [diff] [blame] | 453 | |
| 454 | if (FLAG_concurrent_osr) { |
| 455 | isolate()->optimizing_compiler_thread()->AgeBufferedOsrJobs(); |
| 456 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 457 | } |
| 458 | |
ulan@chromium.org | 56c14af | 2012-09-20 12:51:09 +0000 | [diff] [blame] | 459 | |
kmillikin@chromium.org | f05f291 | 2010-09-30 10:07:24 +0000 | [diff] [blame] | 460 | intptr_t Heap::SizeOfObjects() { |
| 461 | intptr_t total = 0; |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 462 | AllSpaces spaces(this); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 463 | for (Space* space = spaces.next(); space != NULL; space = spaces.next()) { |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 464 | total += space->SizeOfObjects(); |
sgjesse@chromium.org | 911335c | 2009-08-19 12:59:44 +0000 | [diff] [blame] | 465 | } |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 466 | return total; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 467 | } |
| 468 | |
ulan@chromium.org | 56c14af | 2012-09-20 12:51:09 +0000 | [diff] [blame] | 469 | |
| 470 | void Heap::RepairFreeListsAfterBoot() { |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 471 | PagedSpaces spaces(this); |
ulan@chromium.org | 56c14af | 2012-09-20 12:51:09 +0000 | [diff] [blame] | 472 | for (PagedSpace* space = spaces.next(); |
| 473 | space != NULL; |
| 474 | space = spaces.next()) { |
| 475 | space->RepairFreeListsAfterBoot(); |
| 476 | } |
| 477 | } |
| 478 | |
| 479 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 480 | void Heap::GarbageCollectionEpilogue() { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 481 | store_buffer()->GCEpilogue(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 482 | |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 483 | // In release mode, we only zap the from space under heap verification. |
| 484 | if (Heap::ShouldZapGarbage()) { |
| 485 | ZapFromSpace(); |
| 486 | } |
| 487 | |
| 488 | #ifdef VERIFY_HEAP |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 489 | if (FLAG_verify_heap) { |
| 490 | Verify(); |
| 491 | } |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 492 | #endif |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 493 | |
rossberg@chromium.org | 79e7902 | 2013-06-03 15:43:46 +0000 | [diff] [blame] | 494 | AllowHeapAllocation for_the_rest_of_the_epilogue; |
| 495 | |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 496 | #ifdef DEBUG |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 497 | if (FLAG_print_global_handles) isolate_->global_handles()->Print(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 498 | if (FLAG_print_handles) PrintHandles(); |
| 499 | if (FLAG_gc_verbose) Print(); |
| 500 | if (FLAG_code_stats) ReportCodeStatistics("After GC"); |
| 501 | #endif |
ulan@chromium.org | 32d7dba | 2013-04-24 10:59:06 +0000 | [diff] [blame] | 502 | if (FLAG_deopt_every_n_garbage_collections > 0) { |
| 503 | if (++gcs_since_last_deopt_ == FLAG_deopt_every_n_garbage_collections) { |
| 504 | Deoptimizer::DeoptimizeAll(isolate()); |
| 505 | gcs_since_last_deopt_ = 0; |
| 506 | } |
| 507 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 508 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 509 | isolate_->counters()->alive_after_last_gc()->Set( |
| 510 | static_cast<int>(SizeOfObjects())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 511 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 512 | isolate_->counters()->string_table_capacity()->Set( |
| 513 | string_table()->Capacity()); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 514 | isolate_->counters()->number_of_symbols()->Set( |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 515 | string_table()->NumberOfElements()); |
jkummerow@chromium.org | 7a6fc81 | 2012-06-27 11:12:38 +0000 | [diff] [blame] | 516 | |
mstarzinger@chromium.org | a2e1a40 | 2013-10-15 08:25:05 +0000 | [diff] [blame] | 517 | if (full_codegen_bytes_generated_ + crankshaft_codegen_bytes_generated_ > 0) { |
| 518 | isolate_->counters()->codegen_fraction_crankshaft()->AddSample( |
| 519 | static_cast<int>((crankshaft_codegen_bytes_generated_ * 100.0) / |
| 520 | (crankshaft_codegen_bytes_generated_ |
| 521 | + full_codegen_bytes_generated_))); |
| 522 | } |
| 523 | |
verwaest@chromium.org | 753aee4 | 2012-07-17 16:15:42 +0000 | [diff] [blame] | 524 | if (CommittedMemory() > 0) { |
| 525 | isolate_->counters()->external_fragmentation_total()->AddSample( |
| 526 | static_cast<int>(100 - (SizeOfObjects() * 100.0) / CommittedMemory())); |
mstarzinger@chromium.org | 471f2f1 | 2012-08-10 14:46:33 +0000 | [diff] [blame] | 527 | |
mstarzinger@chromium.org | a2e1a40 | 2013-10-15 08:25:05 +0000 | [diff] [blame] | 528 | isolate_->counters()->heap_fraction_new_space()-> |
| 529 | AddSample(static_cast<int>( |
| 530 | (new_space()->CommittedMemory() * 100.0) / CommittedMemory())); |
| 531 | isolate_->counters()->heap_fraction_old_pointer_space()->AddSample( |
| 532 | static_cast<int>( |
| 533 | (old_pointer_space()->CommittedMemory() * 100.0) / |
| 534 | CommittedMemory())); |
| 535 | isolate_->counters()->heap_fraction_old_data_space()->AddSample( |
| 536 | static_cast<int>( |
| 537 | (old_data_space()->CommittedMemory() * 100.0) / |
| 538 | CommittedMemory())); |
| 539 | isolate_->counters()->heap_fraction_code_space()-> |
| 540 | AddSample(static_cast<int>( |
| 541 | (code_space()->CommittedMemory() * 100.0) / CommittedMemory())); |
mstarzinger@chromium.org | 471f2f1 | 2012-08-10 14:46:33 +0000 | [diff] [blame] | 542 | isolate_->counters()->heap_fraction_map_space()->AddSample( |
| 543 | static_cast<int>( |
| 544 | (map_space()->CommittedMemory() * 100.0) / CommittedMemory())); |
| 545 | isolate_->counters()->heap_fraction_cell_space()->AddSample( |
| 546 | static_cast<int>( |
| 547 | (cell_space()->CommittedMemory() * 100.0) / CommittedMemory())); |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 548 | isolate_->counters()->heap_fraction_property_cell_space()-> |
| 549 | AddSample(static_cast<int>( |
| 550 | (property_cell_space()->CommittedMemory() * 100.0) / |
| 551 | CommittedMemory())); |
mstarzinger@chromium.org | a2e1a40 | 2013-10-15 08:25:05 +0000 | [diff] [blame] | 552 | isolate_->counters()->heap_fraction_lo_space()-> |
| 553 | AddSample(static_cast<int>( |
| 554 | (lo_space()->CommittedMemory() * 100.0) / CommittedMemory())); |
mstarzinger@chromium.org | 471f2f1 | 2012-08-10 14:46:33 +0000 | [diff] [blame] | 555 | |
| 556 | isolate_->counters()->heap_sample_total_committed()->AddSample( |
| 557 | static_cast<int>(CommittedMemory() / KB)); |
| 558 | isolate_->counters()->heap_sample_total_used()->AddSample( |
| 559 | static_cast<int>(SizeOfObjects() / KB)); |
| 560 | isolate_->counters()->heap_sample_map_space_committed()->AddSample( |
| 561 | static_cast<int>(map_space()->CommittedMemory() / KB)); |
| 562 | isolate_->counters()->heap_sample_cell_space_committed()->AddSample( |
| 563 | static_cast<int>(cell_space()->CommittedMemory() / KB)); |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 564 | isolate_->counters()-> |
| 565 | heap_sample_property_cell_space_committed()-> |
| 566 | AddSample(static_cast<int>( |
| 567 | property_cell_space()->CommittedMemory() / KB)); |
mstarzinger@chromium.org | a2e1a40 | 2013-10-15 08:25:05 +0000 | [diff] [blame] | 568 | isolate_->counters()->heap_sample_code_space_committed()->AddSample( |
| 569 | static_cast<int>(code_space()->CommittedMemory() / KB)); |
jkummerow@chromium.org | 28583c9 | 2012-07-16 11:31:55 +0000 | [diff] [blame] | 570 | } |
verwaest@chromium.org | 753aee4 | 2012-07-17 16:15:42 +0000 | [diff] [blame] | 571 | |
| 572 | #define UPDATE_COUNTERS_FOR_SPACE(space) \ |
| 573 | isolate_->counters()->space##_bytes_available()->Set( \ |
| 574 | static_cast<int>(space()->Available())); \ |
| 575 | isolate_->counters()->space##_bytes_committed()->Set( \ |
| 576 | static_cast<int>(space()->CommittedMemory())); \ |
| 577 | isolate_->counters()->space##_bytes_used()->Set( \ |
| 578 | static_cast<int>(space()->SizeOfObjects())); |
| 579 | #define UPDATE_FRAGMENTATION_FOR_SPACE(space) \ |
| 580 | if (space()->CommittedMemory() > 0) { \ |
| 581 | isolate_->counters()->external_fragmentation_##space()->AddSample( \ |
| 582 | static_cast<int>(100 - \ |
| 583 | (space()->SizeOfObjects() * 100.0) / space()->CommittedMemory())); \ |
| 584 | } |
| 585 | #define UPDATE_COUNTERS_AND_FRAGMENTATION_FOR_SPACE(space) \ |
| 586 | UPDATE_COUNTERS_FOR_SPACE(space) \ |
| 587 | UPDATE_FRAGMENTATION_FOR_SPACE(space) |
| 588 | |
jkummerow@chromium.org | 28583c9 | 2012-07-16 11:31:55 +0000 | [diff] [blame] | 589 | UPDATE_COUNTERS_FOR_SPACE(new_space) |
verwaest@chromium.org | 753aee4 | 2012-07-17 16:15:42 +0000 | [diff] [blame] | 590 | UPDATE_COUNTERS_AND_FRAGMENTATION_FOR_SPACE(old_pointer_space) |
| 591 | UPDATE_COUNTERS_AND_FRAGMENTATION_FOR_SPACE(old_data_space) |
| 592 | UPDATE_COUNTERS_AND_FRAGMENTATION_FOR_SPACE(code_space) |
| 593 | UPDATE_COUNTERS_AND_FRAGMENTATION_FOR_SPACE(map_space) |
| 594 | UPDATE_COUNTERS_AND_FRAGMENTATION_FOR_SPACE(cell_space) |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 595 | UPDATE_COUNTERS_AND_FRAGMENTATION_FOR_SPACE(property_cell_space) |
verwaest@chromium.org | 753aee4 | 2012-07-17 16:15:42 +0000 | [diff] [blame] | 596 | UPDATE_COUNTERS_AND_FRAGMENTATION_FOR_SPACE(lo_space) |
jkummerow@chromium.org | 28583c9 | 2012-07-16 11:31:55 +0000 | [diff] [blame] | 597 | #undef UPDATE_COUNTERS_FOR_SPACE |
verwaest@chromium.org | 753aee4 | 2012-07-17 16:15:42 +0000 | [diff] [blame] | 598 | #undef UPDATE_FRAGMENTATION_FOR_SPACE |
| 599 | #undef UPDATE_COUNTERS_AND_FRAGMENTATION_FOR_SPACE |
jkummerow@chromium.org | 7a6fc81 | 2012-06-27 11:12:38 +0000 | [diff] [blame] | 600 | |
whesse@chromium.org | 030d38e | 2011-07-13 13:23:34 +0000 | [diff] [blame] | 601 | #if defined(DEBUG) |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 602 | ReportStatisticsAfterGC(); |
whesse@chromium.org | 030d38e | 2011-07-13 13:23:34 +0000 | [diff] [blame] | 603 | #endif // DEBUG |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 604 | #ifdef ENABLE_DEBUGGER_SUPPORT |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 605 | isolate_->debug()->AfterGarbageCollection(); |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 606 | #endif // ENABLE_DEBUGGER_SUPPORT |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 607 | } |
| 608 | |
| 609 | |
rossberg@chromium.org | 994edf6 | 2012-02-06 10:12:55 +0000 | [diff] [blame] | 610 | void Heap::CollectAllGarbage(int flags, const char* gc_reason) { |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 611 | // Since we are ignoring the return value, the exact choice of space does |
| 612 | // not matter, so long as we do not specify NEW_SPACE, which would not |
| 613 | // cause a full GC. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 614 | mark_compact_collector_.SetFlags(flags); |
rossberg@chromium.org | 994edf6 | 2012-02-06 10:12:55 +0000 | [diff] [blame] | 615 | CollectGarbage(OLD_POINTER_SPACE, gc_reason); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 616 | mark_compact_collector_.SetFlags(kNoGCFlags); |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 617 | } |
| 618 | |
| 619 | |
rossberg@chromium.org | 994edf6 | 2012-02-06 10:12:55 +0000 | [diff] [blame] | 620 | void Heap::CollectAllAvailableGarbage(const char* gc_reason) { |
whesse@chromium.org | f0ac72d | 2010-11-08 12:47:26 +0000 | [diff] [blame] | 621 | // Since we are ignoring the return value, the exact choice of space does |
| 622 | // not matter, so long as we do not specify NEW_SPACE, which would not |
| 623 | // cause a full GC. |
whesse@chromium.org | f0ac72d | 2010-11-08 12:47:26 +0000 | [diff] [blame] | 624 | // Major GC would invoke weak handle callbacks on weakly reachable |
| 625 | // handles, but won't collect weakly reachable objects until next |
| 626 | // major GC. Therefore if we collect aggressively and weak handle callback |
| 627 | // has been invoked, we rerun major GC to release objects which become |
| 628 | // garbage. |
| 629 | // Note: as weak callbacks can execute arbitrary code, we cannot |
| 630 | // hope that eventually there will be no weak callbacks invocations. |
| 631 | // Therefore stop recollecting after several attempts. |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 632 | if (FLAG_concurrent_recompilation) { |
| 633 | // The optimizing compiler may be unnecessarily holding on to memory. |
| 634 | DisallowHeapAllocation no_recursive_gc; |
| 635 | isolate()->optimizing_compiler_thread()->Flush(); |
| 636 | } |
rossberg@chromium.org | 994edf6 | 2012-02-06 10:12:55 +0000 | [diff] [blame] | 637 | mark_compact_collector()->SetFlags(kMakeHeapIterableMask | |
| 638 | kReduceMemoryFootprintMask); |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 639 | isolate_->compilation_cache()->Clear(); |
whesse@chromium.org | f0ac72d | 2010-11-08 12:47:26 +0000 | [diff] [blame] | 640 | const int kMaxNumberOfAttempts = 7; |
danno@chromium.org | bee5199 | 2013-07-10 14:57:15 +0000 | [diff] [blame] | 641 | const int kMinNumberOfAttempts = 2; |
whesse@chromium.org | f0ac72d | 2010-11-08 12:47:26 +0000 | [diff] [blame] | 642 | for (int attempt = 0; attempt < kMaxNumberOfAttempts; attempt++) { |
danno@chromium.org | bee5199 | 2013-07-10 14:57:15 +0000 | [diff] [blame] | 643 | if (!CollectGarbage(OLD_POINTER_SPACE, MARK_COMPACTOR, gc_reason, NULL) && |
| 644 | attempt + 1 >= kMinNumberOfAttempts) { |
whesse@chromium.org | f0ac72d | 2010-11-08 12:47:26 +0000 | [diff] [blame] | 645 | break; |
| 646 | } |
| 647 | } |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 648 | mark_compact_collector()->SetFlags(kNoGCFlags); |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 649 | new_space_.Shrink(); |
danno@chromium.org | bf0c820 | 2011-12-27 10:09:42 +0000 | [diff] [blame] | 650 | UncommitFromSpace(); |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 651 | incremental_marking()->UncommitMarkingDeque(); |
whesse@chromium.org | f0ac72d | 2010-11-08 12:47:26 +0000 | [diff] [blame] | 652 | } |
| 653 | |
| 654 | |
rossberg@chromium.org | 994edf6 | 2012-02-06 10:12:55 +0000 | [diff] [blame] | 655 | bool Heap::CollectGarbage(AllocationSpace space, |
| 656 | GarbageCollector collector, |
| 657 | const char* gc_reason, |
| 658 | const char* collector_reason) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 659 | // The VM is in the GC state until exiting this function. |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 660 | VMState<GC> state(isolate_); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 661 | |
| 662 | #ifdef DEBUG |
| 663 | // Reset the allocation timeout to the GC interval, but make sure to |
| 664 | // allow at least a few allocations after a collection. The reason |
| 665 | // for this is that we have a lot of allocation sequences and we |
| 666 | // assume that a garbage collection will allow the subsequent |
| 667 | // allocation attempts to go through. |
| 668 | allocation_timeout_ = Max(6, FLAG_gc_interval); |
| 669 | #endif |
| 670 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 671 | if (collector == SCAVENGER && !incremental_marking()->IsStopped()) { |
| 672 | if (FLAG_trace_incremental_marking) { |
| 673 | PrintF("[IncrementalMarking] Scavenge during marking.\n"); |
| 674 | } |
| 675 | } |
| 676 | |
| 677 | if (collector == MARK_COMPACTOR && |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 678 | !mark_compact_collector()->abort_incremental_marking() && |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 679 | !incremental_marking()->IsStopped() && |
| 680 | !incremental_marking()->should_hurry() && |
| 681 | FLAG_incremental_marking_steps) { |
fschneider@chromium.org | 7d10be5 | 2012-04-10 12:30:14 +0000 | [diff] [blame] | 682 | // Make progress in incremental marking. |
| 683 | const intptr_t kStepSizeWhenDelayedByScavenge = 1 * MB; |
| 684 | incremental_marking()->Step(kStepSizeWhenDelayedByScavenge, |
| 685 | IncrementalMarking::NO_GC_VIA_STACK_GUARD); |
| 686 | if (!incremental_marking()->IsComplete()) { |
| 687 | if (FLAG_trace_incremental_marking) { |
| 688 | PrintF("[IncrementalMarking] Delaying MarkSweep.\n"); |
| 689 | } |
| 690 | collector = SCAVENGER; |
| 691 | collector_reason = "incremental marking delaying mark-sweep"; |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 692 | } |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 693 | } |
| 694 | |
whesse@chromium.org | f0ac72d | 2010-11-08 12:47:26 +0000 | [diff] [blame] | 695 | bool next_gc_likely_to_collect_more = false; |
| 696 | |
rossberg@chromium.org | 994edf6 | 2012-02-06 10:12:55 +0000 | [diff] [blame] | 697 | { GCTracer tracer(this, gc_reason, collector_reason); |
rossberg@chromium.org | 79e7902 | 2013-06-03 15:43:46 +0000 | [diff] [blame] | 698 | ASSERT(AllowHeapAllocation::IsAllowed()); |
| 699 | DisallowHeapAllocation no_allocation_during_gc; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 700 | GarbageCollectionPrologue(); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 701 | // The GC count was incremented in the prologue. Tell the tracer about |
| 702 | // it. |
| 703 | tracer.set_gc_count(gc_count_); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 704 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 705 | // Tell the tracer which collector we've selected. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 706 | tracer.set_collector(collector); |
| 707 | |
ulan@chromium.org | 8e8d882 | 2012-11-23 14:36:46 +0000 | [diff] [blame] | 708 | { |
| 709 | HistogramTimerScope histogram_timer_scope( |
| 710 | (collector == SCAVENGER) ? isolate_->counters()->gc_scavenger() |
| 711 | : isolate_->counters()->gc_compactor()); |
| 712 | next_gc_likely_to_collect_more = |
| 713 | PerformGarbageCollection(collector, &tracer); |
| 714 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 715 | |
| 716 | GarbageCollectionEpilogue(); |
| 717 | } |
| 718 | |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 719 | // Start incremental marking for the next cycle. The heap snapshot |
| 720 | // generator needs incremental marking to stay off after it aborted. |
| 721 | if (!mark_compact_collector()->abort_incremental_marking() && |
| 722 | incremental_marking()->IsStopped() && |
| 723 | incremental_marking()->WorthActivating() && |
| 724 | NextGCIsLikelyToBeFull()) { |
| 725 | incremental_marking()->Start(); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 726 | } |
| 727 | |
whesse@chromium.org | f0ac72d | 2010-11-08 12:47:26 +0000 | [diff] [blame] | 728 | return next_gc_likely_to_collect_more; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 729 | } |
| 730 | |
| 731 | |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 732 | int Heap::NotifyContextDisposed() { |
rossberg@chromium.org | 9259716 | 2013-08-23 13:28:00 +0000 | [diff] [blame] | 733 | if (FLAG_concurrent_recompilation) { |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 734 | // Flush the queued recompilation tasks. |
| 735 | isolate()->optimizing_compiler_thread()->Flush(); |
| 736 | } |
| 737 | flush_monomorphic_ics_ = true; |
| 738 | return ++contexts_disposed_; |
| 739 | } |
| 740 | |
| 741 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 742 | void Heap::PerformScavenge() { |
rossberg@chromium.org | 994edf6 | 2012-02-06 10:12:55 +0000 | [diff] [blame] | 743 | GCTracer tracer(this, NULL, NULL); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 744 | if (incremental_marking()->IsStopped()) { |
| 745 | PerformGarbageCollection(SCAVENGER, &tracer); |
| 746 | } else { |
| 747 | PerformGarbageCollection(MARK_COMPACTOR, &tracer); |
| 748 | } |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 749 | } |
| 750 | |
| 751 | |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 752 | void Heap::MoveElements(FixedArray* array, |
| 753 | int dst_index, |
| 754 | int src_index, |
| 755 | int len) { |
| 756 | if (len == 0) return; |
| 757 | |
hpayer@chromium.org | c5d4971 | 2013-09-11 08:25:48 +0000 | [diff] [blame] | 758 | ASSERT(array->map() != fixed_cow_array_map()); |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 759 | Object** dst_objects = array->data_start() + dst_index; |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 760 | OS::MemMove(dst_objects, |
| 761 | array->data_start() + src_index, |
| 762 | len * kPointerSize); |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 763 | if (!InNewSpace(array)) { |
| 764 | for (int i = 0; i < len; i++) { |
| 765 | // TODO(hpayer): check store buffer for entries |
| 766 | if (InNewSpace(dst_objects[i])) { |
| 767 | RecordWrite(array->address(), array->OffsetOfElementAt(dst_index + i)); |
| 768 | } |
| 769 | } |
| 770 | } |
| 771 | incremental_marking()->RecordWrites(array); |
| 772 | } |
| 773 | |
| 774 | |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 775 | #ifdef VERIFY_HEAP |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 776 | // Helper class for verifying the string table. |
| 777 | class StringTableVerifier : public ObjectVisitor { |
kasperl@chromium.org | 416c5b0 | 2009-04-14 14:03:52 +0000 | [diff] [blame] | 778 | public: |
kasperl@chromium.org | 416c5b0 | 2009-04-14 14:03:52 +0000 | [diff] [blame] | 779 | void VisitPointers(Object** start, Object** end) { |
| 780 | // Visit all HeapObject pointers in [start, end). |
| 781 | for (Object** p = start; p < end; p++) { |
| 782 | if ((*p)->IsHeapObject()) { |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 783 | // Check that the string is actually internalized. |
| 784 | CHECK((*p)->IsTheHole() || (*p)->IsUndefined() || |
| 785 | (*p)->IsInternalizedString()); |
kasperl@chromium.org | d1e3e72 | 2009-04-14 13:38:25 +0000 | [diff] [blame] | 786 | } |
| 787 | } |
kasperl@chromium.org | 416c5b0 | 2009-04-14 14:03:52 +0000 | [diff] [blame] | 788 | } |
| 789 | }; |
kasperl@chromium.org | d1e3e72 | 2009-04-14 13:38:25 +0000 | [diff] [blame] | 790 | |
kasperl@chromium.org | 416c5b0 | 2009-04-14 14:03:52 +0000 | [diff] [blame] | 791 | |
hpayer@chromium.org | c5d4971 | 2013-09-11 08:25:48 +0000 | [diff] [blame] | 792 | static void VerifyStringTable(Heap* heap) { |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 793 | StringTableVerifier verifier; |
hpayer@chromium.org | c5d4971 | 2013-09-11 08:25:48 +0000 | [diff] [blame] | 794 | heap->string_table()->IterateElements(&verifier); |
kasperl@chromium.org | d1e3e72 | 2009-04-14 13:38:25 +0000 | [diff] [blame] | 795 | } |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 796 | #endif // VERIFY_HEAP |
kasperl@chromium.org | d1e3e72 | 2009-04-14 13:38:25 +0000 | [diff] [blame] | 797 | |
| 798 | |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 799 | static bool AbortIncrementalMarkingAndCollectGarbage( |
| 800 | Heap* heap, |
| 801 | AllocationSpace space, |
| 802 | const char* gc_reason = NULL) { |
| 803 | heap->mark_compact_collector()->SetFlags(Heap::kAbortIncrementalMarkingMask); |
| 804 | bool result = heap->CollectGarbage(space, gc_reason); |
| 805 | heap->mark_compact_collector()->SetFlags(Heap::kNoGCFlags); |
| 806 | return result; |
| 807 | } |
| 808 | |
| 809 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 810 | void Heap::ReserveSpace( |
ulan@chromium.org | 56c14af | 2012-09-20 12:51:09 +0000 | [diff] [blame] | 811 | int *sizes, |
| 812 | Address *locations_out) { |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 813 | bool gc_performed = true; |
jkummerow@chromium.org | 05ed9dd | 2012-01-23 14:42:48 +0000 | [diff] [blame] | 814 | int counter = 0; |
| 815 | static const int kThreshold = 20; |
| 816 | while (gc_performed && counter++ < kThreshold) { |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 817 | gc_performed = false; |
ulan@chromium.org | 56c14af | 2012-09-20 12:51:09 +0000 | [diff] [blame] | 818 | ASSERT(NEW_SPACE == FIRST_PAGED_SPACE - 1); |
| 819 | for (int space = NEW_SPACE; space <= LAST_PAGED_SPACE; space++) { |
| 820 | if (sizes[space] != 0) { |
| 821 | MaybeObject* allocation; |
| 822 | if (space == NEW_SPACE) { |
| 823 | allocation = new_space()->AllocateRaw(sizes[space]); |
| 824 | } else { |
| 825 | allocation = paged_space(space)->AllocateRaw(sizes[space]); |
| 826 | } |
| 827 | FreeListNode* node; |
| 828 | if (!allocation->To<FreeListNode>(&node)) { |
| 829 | if (space == NEW_SPACE) { |
| 830 | Heap::CollectGarbage(NEW_SPACE, |
| 831 | "failed to reserve space in the new space"); |
| 832 | } else { |
| 833 | AbortIncrementalMarkingAndCollectGarbage( |
| 834 | this, |
| 835 | static_cast<AllocationSpace>(space), |
| 836 | "failed to reserve space in paged space"); |
| 837 | } |
| 838 | gc_performed = true; |
| 839 | break; |
| 840 | } else { |
| 841 | // Mark with a free list node, in case we have a GC before |
| 842 | // deserializing. |
| 843 | node->set_size(this, sizes[space]); |
| 844 | locations_out[space] = node->address(); |
| 845 | } |
| 846 | } |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 847 | } |
| 848 | } |
jkummerow@chromium.org | 05ed9dd | 2012-01-23 14:42:48 +0000 | [diff] [blame] | 849 | |
| 850 | if (gc_performed) { |
| 851 | // Failed to reserve the space after several attempts. |
| 852 | V8::FatalProcessOutOfMemory("Heap::ReserveSpace"); |
| 853 | } |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 854 | } |
| 855 | |
| 856 | |
ager@chromium.org | add848f | 2009-08-13 12:44:13 +0000 | [diff] [blame] | 857 | void Heap::EnsureFromSpaceIsCommitted() { |
| 858 | if (new_space_.CommitFromSpaceIfNeeded()) return; |
| 859 | |
| 860 | // Committing memory to from space failed. |
ager@chromium.org | add848f | 2009-08-13 12:44:13 +0000 | [diff] [blame] | 861 | // Memory is exhausted and we will die. |
| 862 | V8::FatalProcessOutOfMemory("Committing semi space failed."); |
| 863 | } |
| 864 | |
| 865 | |
fschneider@chromium.org | e03fb64 | 2010-11-01 12:34:09 +0000 | [diff] [blame] | 866 | void Heap::ClearJSFunctionResultCaches() { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 867 | if (isolate_->bootstrapper()->IsActive()) return; |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 868 | |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 869 | Object* context = native_contexts_list_; |
fschneider@chromium.org | e03fb64 | 2010-11-01 12:34:09 +0000 | [diff] [blame] | 870 | while (!context->IsUndefined()) { |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 871 | // Get the caches for this context. GC can happen when the context |
| 872 | // is not fully initialized, so the caches can be undefined. |
| 873 | Object* caches_or_undefined = |
| 874 | Context::cast(context)->get(Context::JSFUNCTION_RESULT_CACHES_INDEX); |
| 875 | if (!caches_or_undefined->IsUndefined()) { |
| 876 | FixedArray* caches = FixedArray::cast(caches_or_undefined); |
| 877 | // Clear the caches: |
| 878 | int length = caches->length(); |
| 879 | for (int i = 0; i < length; i++) { |
| 880 | JSFunctionResultCache::cast(caches->get(i))->Clear(); |
| 881 | } |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 882 | } |
fschneider@chromium.org | e03fb64 | 2010-11-01 12:34:09 +0000 | [diff] [blame] | 883 | // Get the next context: |
| 884 | context = Context::cast(context)->get(Context::NEXT_CONTEXT_LINK); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 885 | } |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 886 | } |
| 887 | |
| 888 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 889 | void Heap::ClearNormalizedMapCaches() { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 890 | if (isolate_->bootstrapper()->IsActive() && |
| 891 | !incremental_marking()->IsMarking()) { |
| 892 | return; |
| 893 | } |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 894 | |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 895 | Object* context = native_contexts_list_; |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 896 | while (!context->IsUndefined()) { |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 897 | // GC can happen when the context is not fully initialized, |
| 898 | // so the cache can be undefined. |
| 899 | Object* cache = |
| 900 | Context::cast(context)->get(Context::NORMALIZED_MAP_CACHE_INDEX); |
| 901 | if (!cache->IsUndefined()) { |
| 902 | NormalizedMapCache::cast(cache)->Clear(); |
| 903 | } |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 904 | context = Context::cast(context)->get(Context::NEXT_CONTEXT_LINK); |
| 905 | } |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 906 | } |
| 907 | |
| 908 | |
fschneider@chromium.org | 40b9da3 | 2010-06-28 11:29:21 +0000 | [diff] [blame] | 909 | void Heap::UpdateSurvivalRateTrend(int start_new_space_size) { |
| 910 | double survival_rate = |
| 911 | (static_cast<double>(young_survivors_after_last_gc_) * 100) / |
| 912 | start_new_space_size; |
| 913 | |
yangguo@chromium.org | 659ceec | 2012-01-26 07:37:54 +0000 | [diff] [blame] | 914 | if (survival_rate > kYoungSurvivalRateHighThreshold) { |
fschneider@chromium.org | 40b9da3 | 2010-06-28 11:29:21 +0000 | [diff] [blame] | 915 | high_survival_rate_period_length_++; |
| 916 | } else { |
| 917 | high_survival_rate_period_length_ = 0; |
| 918 | } |
| 919 | |
yangguo@chromium.org | 659ceec | 2012-01-26 07:37:54 +0000 | [diff] [blame] | 920 | if (survival_rate < kYoungSurvivalRateLowThreshold) { |
| 921 | low_survival_rate_period_length_++; |
| 922 | } else { |
| 923 | low_survival_rate_period_length_ = 0; |
| 924 | } |
| 925 | |
fschneider@chromium.org | 40b9da3 | 2010-06-28 11:29:21 +0000 | [diff] [blame] | 926 | double survival_rate_diff = survival_rate_ - survival_rate; |
| 927 | |
| 928 | if (survival_rate_diff > kYoungSurvivalRateAllowedDeviation) { |
| 929 | set_survival_rate_trend(DECREASING); |
| 930 | } else if (survival_rate_diff < -kYoungSurvivalRateAllowedDeviation) { |
| 931 | set_survival_rate_trend(INCREASING); |
| 932 | } else { |
| 933 | set_survival_rate_trend(STABLE); |
| 934 | } |
| 935 | |
| 936 | survival_rate_ = survival_rate; |
| 937 | } |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 938 | |
whesse@chromium.org | f0ac72d | 2010-11-08 12:47:26 +0000 | [diff] [blame] | 939 | bool Heap::PerformGarbageCollection(GarbageCollector collector, |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 940 | GCTracer* tracer) { |
whesse@chromium.org | f0ac72d | 2010-11-08 12:47:26 +0000 | [diff] [blame] | 941 | bool next_gc_likely_to_collect_more = false; |
| 942 | |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 943 | if (collector != SCAVENGER) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 944 | PROFILE(isolate_, CodeMovingGCEvent()); |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 945 | } |
| 946 | |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 947 | #ifdef VERIFY_HEAP |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 948 | if (FLAG_verify_heap) { |
hpayer@chromium.org | c5d4971 | 2013-09-11 08:25:48 +0000 | [diff] [blame] | 949 | VerifyStringTable(this); |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 950 | } |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 951 | #endif |
| 952 | |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 953 | GCType gc_type = |
| 954 | collector == MARK_COMPACTOR ? kGCTypeMarkSweepCompact : kGCTypeScavenge; |
| 955 | |
yangguo@chromium.org | 46a2a51 | 2013-01-18 16:29:40 +0000 | [diff] [blame] | 956 | { |
| 957 | GCTracer::Scope scope(tracer, GCTracer::Scope::EXTERNAL); |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 958 | VMState<EXTERNAL> state(isolate_); |
jkummerow@chromium.org | fb732b1 | 2013-07-26 10:27:09 +0000 | [diff] [blame] | 959 | HandleScope handle_scope(isolate_); |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 960 | CallGCPrologueCallbacks(gc_type, kNoGCCallbackFlags); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 961 | } |
| 962 | |
ager@chromium.org | add848f | 2009-08-13 12:44:13 +0000 | [diff] [blame] | 963 | EnsureFromSpaceIsCommitted(); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 964 | |
kmillikin@chromium.org | f05f291 | 2010-09-30 10:07:24 +0000 | [diff] [blame] | 965 | int start_new_space_size = Heap::new_space()->SizeAsInt(); |
fschneider@chromium.org | 40b9da3 | 2010-06-28 11:29:21 +0000 | [diff] [blame] | 966 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 967 | if (IsHighSurvivalRate()) { |
| 968 | // We speed up the incremental marker if it is running so that it |
| 969 | // does not fall behind the rate of promotion, which would cause a |
| 970 | // constantly growing old space. |
| 971 | incremental_marking()->NotifyOfHighPromotionRate(); |
| 972 | } |
| 973 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 974 | if (collector == MARK_COMPACTOR) { |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 975 | // Perform mark-sweep with optional compaction. |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 976 | MarkCompact(tracer); |
jkummerow@chromium.org | ddda9e8 | 2011-07-06 11:27:02 +0000 | [diff] [blame] | 977 | sweep_generation_++; |
fschneider@chromium.org | 40b9da3 | 2010-06-28 11:29:21 +0000 | [diff] [blame] | 978 | |
| 979 | UpdateSurvivalRateTrend(start_new_space_size); |
| 980 | |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 981 | size_of_old_gen_at_last_old_space_gc_ = PromotedSpaceSizeOfObjects(); |
fschneider@chromium.org | 40b9da3 | 2010-06-28 11:29:21 +0000 | [diff] [blame] | 982 | |
svenpanne@chromium.org | a53e8e0 | 2013-05-24 12:35:50 +0000 | [diff] [blame] | 983 | old_generation_allocation_limit_ = |
| 984 | OldGenerationAllocationLimit(size_of_old_gen_at_last_old_space_gc_); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 985 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 986 | old_gen_exhausted_ = false; |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 987 | } else { |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 988 | tracer_ = tracer; |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 989 | Scavenge(); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 990 | tracer_ = NULL; |
fschneider@chromium.org | 40b9da3 | 2010-06-28 11:29:21 +0000 | [diff] [blame] | 991 | |
| 992 | UpdateSurvivalRateTrend(start_new_space_size); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 993 | } |
ager@chromium.org | 439e85a | 2009-08-26 13:15:29 +0000 | [diff] [blame] | 994 | |
yangguo@chromium.org | 659ceec | 2012-01-26 07:37:54 +0000 | [diff] [blame] | 995 | if (!new_space_high_promotion_mode_active_ && |
| 996 | new_space_.Capacity() == new_space_.MaximumCapacity() && |
| 997 | IsStableOrIncreasingSurvivalTrend() && |
| 998 | IsHighSurvivalRate()) { |
| 999 | // Stable high survival rates even though young generation is at |
| 1000 | // maximum capacity indicates that most objects will be promoted. |
| 1001 | // To decrease scavenger pauses and final mark-sweep pauses, we |
| 1002 | // have to limit maximal capacity of the young generation. |
svenpanne@chromium.org | a53e8e0 | 2013-05-24 12:35:50 +0000 | [diff] [blame] | 1003 | SetNewSpaceHighPromotionModeActive(true); |
yangguo@chromium.org | 659ceec | 2012-01-26 07:37:54 +0000 | [diff] [blame] | 1004 | if (FLAG_trace_gc) { |
rossberg@chromium.org | 657d53b | 2012-07-12 11:06:03 +0000 | [diff] [blame] | 1005 | PrintPID("Limited new space size due to high promotion rate: %d MB\n", |
| 1006 | new_space_.InitialCapacity() / MB); |
yangguo@chromium.org | 659ceec | 2012-01-26 07:37:54 +0000 | [diff] [blame] | 1007 | } |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 1008 | // Support for global pre-tenuring uses the high promotion mode as a |
| 1009 | // heuristic indicator of whether to pretenure or not, we trigger |
| 1010 | // deoptimization here to take advantage of pre-tenuring as soon as |
| 1011 | // possible. |
svenpanne@chromium.org | a53e8e0 | 2013-05-24 12:35:50 +0000 | [diff] [blame] | 1012 | if (FLAG_pretenuring) { |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 1013 | isolate_->stack_guard()->FullDeopt(); |
| 1014 | } |
yangguo@chromium.org | 659ceec | 2012-01-26 07:37:54 +0000 | [diff] [blame] | 1015 | } else if (new_space_high_promotion_mode_active_ && |
| 1016 | IsStableOrDecreasingSurvivalTrend() && |
| 1017 | IsLowSurvivalRate()) { |
| 1018 | // Decreasing low survival rates might indicate that the above high |
| 1019 | // promotion mode is over and we should allow the young generation |
| 1020 | // to grow again. |
svenpanne@chromium.org | a53e8e0 | 2013-05-24 12:35:50 +0000 | [diff] [blame] | 1021 | SetNewSpaceHighPromotionModeActive(false); |
yangguo@chromium.org | 659ceec | 2012-01-26 07:37:54 +0000 | [diff] [blame] | 1022 | if (FLAG_trace_gc) { |
rossberg@chromium.org | 657d53b | 2012-07-12 11:06:03 +0000 | [diff] [blame] | 1023 | PrintPID("Unlimited new space size due to low promotion rate: %d MB\n", |
| 1024 | new_space_.MaximumCapacity() / MB); |
yangguo@chromium.org | 659ceec | 2012-01-26 07:37:54 +0000 | [diff] [blame] | 1025 | } |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 1026 | // Trigger deoptimization here to turn off pre-tenuring as soon as |
| 1027 | // possible. |
svenpanne@chromium.org | a53e8e0 | 2013-05-24 12:35:50 +0000 | [diff] [blame] | 1028 | if (FLAG_pretenuring) { |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 1029 | isolate_->stack_guard()->FullDeopt(); |
| 1030 | } |
yangguo@chromium.org | 659ceec | 2012-01-26 07:37:54 +0000 | [diff] [blame] | 1031 | } |
| 1032 | |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 1033 | if (new_space_high_promotion_mode_active_ && |
| 1034 | new_space_.Capacity() > new_space_.InitialCapacity()) { |
| 1035 | new_space_.Shrink(); |
| 1036 | } |
| 1037 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1038 | isolate_->counters()->objs_since_last_young()->Set(0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1039 | |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1040 | // Callbacks that fire after this point might trigger nested GCs and |
| 1041 | // restart incremental marking, the assertion can't be moved down. |
| 1042 | ASSERT(collector == SCAVENGER || incremental_marking()->IsStopped()); |
| 1043 | |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 1044 | gc_post_processing_depth_++; |
rossberg@chromium.org | 79e7902 | 2013-06-03 15:43:46 +0000 | [diff] [blame] | 1045 | { AllowHeapAllocation allow_allocation; |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1046 | GCTracer::Scope scope(tracer, GCTracer::Scope::EXTERNAL); |
whesse@chromium.org | f0ac72d | 2010-11-08 12:47:26 +0000 | [diff] [blame] | 1047 | next_gc_likely_to_collect_more = |
rossberg@chromium.org | cddc71f | 2012-12-07 12:40:13 +0000 | [diff] [blame] | 1048 | isolate_->global_handles()->PostGarbageCollectionProcessing( |
| 1049 | collector, tracer); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1050 | } |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 1051 | gc_post_processing_depth_--; |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1052 | |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 1053 | isolate_->eternal_handles()->PostGarbageCollectionProcessing(this); |
| 1054 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1055 | // Update relocatables. |
jkummerow@chromium.org | 3d00d0a | 2013-09-04 13:57:32 +0000 | [diff] [blame] | 1056 | Relocatable::PostGarbageCollectionProcessing(isolate_); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1057 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 1058 | if (collector == MARK_COMPACTOR) { |
| 1059 | // Register the amount of external allocated memory. |
| 1060 | amount_of_external_allocated_memory_at_last_global_gc_ = |
| 1061 | amount_of_external_allocated_memory_; |
| 1062 | } |
| 1063 | |
yangguo@chromium.org | 46a2a51 | 2013-01-18 16:29:40 +0000 | [diff] [blame] | 1064 | { |
| 1065 | GCTracer::Scope scope(tracer, GCTracer::Scope::EXTERNAL); |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 1066 | VMState<EXTERNAL> state(isolate_); |
jkummerow@chromium.org | fb732b1 | 2013-07-26 10:27:09 +0000 | [diff] [blame] | 1067 | HandleScope handle_scope(isolate_); |
yangguo@chromium.org | 003650e | 2013-01-24 16:31:08 +0000 | [diff] [blame] | 1068 | CallGCEpilogueCallbacks(gc_type); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1069 | } |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 1070 | |
| 1071 | #ifdef VERIFY_HEAP |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 1072 | if (FLAG_verify_heap) { |
hpayer@chromium.org | c5d4971 | 2013-09-11 08:25:48 +0000 | [diff] [blame] | 1073 | VerifyStringTable(this); |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 1074 | } |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 1075 | #endif |
whesse@chromium.org | f0ac72d | 2010-11-08 12:47:26 +0000 | [diff] [blame] | 1076 | |
| 1077 | return next_gc_likely_to_collect_more; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1078 | } |
| 1079 | |
| 1080 | |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 1081 | void Heap::CallGCPrologueCallbacks(GCType gc_type, GCCallbackFlags flags) { |
yangguo@chromium.org | 003650e | 2013-01-24 16:31:08 +0000 | [diff] [blame] | 1082 | for (int i = 0; i < gc_prologue_callbacks_.length(); ++i) { |
| 1083 | if (gc_type & gc_prologue_callbacks_[i].gc_type) { |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 1084 | if (!gc_prologue_callbacks_[i].pass_isolate_) { |
| 1085 | v8::GCPrologueCallback callback = |
| 1086 | reinterpret_cast<v8::GCPrologueCallback>( |
| 1087 | gc_prologue_callbacks_[i].callback); |
| 1088 | callback(gc_type, flags); |
| 1089 | } else { |
| 1090 | v8::Isolate* isolate = reinterpret_cast<v8::Isolate*>(this->isolate()); |
| 1091 | gc_prologue_callbacks_[i].callback(isolate, gc_type, flags); |
| 1092 | } |
yangguo@chromium.org | 003650e | 2013-01-24 16:31:08 +0000 | [diff] [blame] | 1093 | } |
| 1094 | } |
| 1095 | } |
| 1096 | |
| 1097 | |
| 1098 | void Heap::CallGCEpilogueCallbacks(GCType gc_type) { |
| 1099 | for (int i = 0; i < gc_epilogue_callbacks_.length(); ++i) { |
| 1100 | if (gc_type & gc_epilogue_callbacks_[i].gc_type) { |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 1101 | if (!gc_epilogue_callbacks_[i].pass_isolate_) { |
| 1102 | v8::GCPrologueCallback callback = |
| 1103 | reinterpret_cast<v8::GCPrologueCallback>( |
| 1104 | gc_epilogue_callbacks_[i].callback); |
| 1105 | callback(gc_type, kNoGCCallbackFlags); |
| 1106 | } else { |
| 1107 | v8::Isolate* isolate = reinterpret_cast<v8::Isolate*>(this->isolate()); |
| 1108 | gc_epilogue_callbacks_[i].callback( |
| 1109 | isolate, gc_type, kNoGCCallbackFlags); |
| 1110 | } |
yangguo@chromium.org | 003650e | 2013-01-24 16:31:08 +0000 | [diff] [blame] | 1111 | } |
| 1112 | } |
yangguo@chromium.org | 003650e | 2013-01-24 16:31:08 +0000 | [diff] [blame] | 1113 | } |
| 1114 | |
| 1115 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 1116 | void Heap::MarkCompact(GCTracer* tracer) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1117 | gc_state_ = MARK_COMPACT; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1118 | LOG(isolate_, ResourceEvent("markcompact", "begin")); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1119 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1120 | mark_compact_collector_.Prepare(tracer); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1121 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1122 | ms_count_++; |
| 1123 | tracer->set_full_gc_count(ms_count_); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1124 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1125 | MarkCompactPrologue(); |
vegorov@chromium.org | 2356e6f | 2010-06-09 09:38:56 +0000 | [diff] [blame] | 1126 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1127 | mark_compact_collector_.CollectGarbage(); |
kasperl@chromium.org | 061ef74 | 2009-02-27 12:16:20 +0000 | [diff] [blame] | 1128 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1129 | LOG(isolate_, ResourceEvent("markcompact", "end")); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1130 | |
| 1131 | gc_state_ = NOT_IN_GC; |
| 1132 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1133 | isolate_->counters()->objs_since_last_full()->Set(0); |
kasperl@chromium.org | 8b2bb26 | 2010-03-01 09:46:28 +0000 | [diff] [blame] | 1134 | |
| 1135 | contexts_disposed_ = 0; |
ulan@chromium.org | 2efb900 | 2012-01-19 15:36:35 +0000 | [diff] [blame] | 1136 | |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 1137 | flush_monomorphic_ics_ = false; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1138 | } |
| 1139 | |
| 1140 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1141 | void Heap::MarkCompactPrologue() { |
kasperl@chromium.org | 061ef74 | 2009-02-27 12:16:20 +0000 | [diff] [blame] | 1142 | // At any old GC clear the keyed lookup cache to enable collection of unused |
| 1143 | // maps. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1144 | isolate_->keyed_lookup_cache()->Clear(); |
| 1145 | isolate_->context_slot_cache()->Clear(); |
| 1146 | isolate_->descriptor_lookup_cache()->Clear(); |
jkummerow@chromium.org | 78502a9 | 2012-09-06 13:50:42 +0000 | [diff] [blame] | 1147 | RegExpResultsCache::Clear(string_split_cache()); |
| 1148 | RegExpResultsCache::Clear(regexp_multiple_cache()); |
kasperl@chromium.org | 061ef74 | 2009-02-27 12:16:20 +0000 | [diff] [blame] | 1149 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1150 | isolate_->compilation_cache()->MarkCompactPrologue(); |
kasperl@chromium.org | 061ef74 | 2009-02-27 12:16:20 +0000 | [diff] [blame] | 1151 | |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 1152 | CompletelyClearInstanceofCache(); |
| 1153 | |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 1154 | FlushNumberStringCache(); |
jkummerow@chromium.org | e297f59 | 2011-06-08 10:05:15 +0000 | [diff] [blame] | 1155 | if (FLAG_cleanup_code_caches_at_gc) { |
| 1156 | polymorphic_code_cache()->set_cache(undefined_value()); |
| 1157 | } |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1158 | |
| 1159 | ClearNormalizedMapCaches(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1160 | } |
| 1161 | |
| 1162 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1163 | // Helper class for copying HeapObjects |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 1164 | class ScavengeVisitor: public ObjectVisitor { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1165 | public: |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1166 | explicit ScavengeVisitor(Heap* heap) : heap_(heap) {} |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1167 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 1168 | void VisitPointer(Object** p) { ScavengePointer(p); } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1169 | |
| 1170 | void VisitPointers(Object** start, Object** end) { |
| 1171 | // Copy all HeapObject pointers in [start, end) |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 1172 | for (Object** p = start; p < end; p++) ScavengePointer(p); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1173 | } |
| 1174 | |
| 1175 | private: |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 1176 | void ScavengePointer(Object** p) { |
| 1177 | Object* object = *p; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1178 | if (!heap_->InNewSpace(object)) return; |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 1179 | Heap::ScavengeObject(reinterpret_cast<HeapObject**>(p), |
| 1180 | reinterpret_cast<HeapObject*>(object)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1181 | } |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1182 | |
| 1183 | Heap* heap_; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1184 | }; |
| 1185 | |
| 1186 | |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 1187 | #ifdef VERIFY_HEAP |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 1188 | // Visitor class to verify pointers in code or data space do not point into |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1189 | // new space. |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 1190 | class VerifyNonPointerSpacePointersVisitor: public ObjectVisitor { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1191 | public: |
hpayer@chromium.org | c5d4971 | 2013-09-11 08:25:48 +0000 | [diff] [blame] | 1192 | explicit VerifyNonPointerSpacePointersVisitor(Heap* heap) : heap_(heap) {} |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1193 | void VisitPointers(Object** start, Object**end) { |
| 1194 | for (Object** current = start; current < end; current++) { |
| 1195 | if ((*current)->IsHeapObject()) { |
hpayer@chromium.org | c5d4971 | 2013-09-11 08:25:48 +0000 | [diff] [blame] | 1196 | CHECK(!heap_->InNewSpace(HeapObject::cast(*current))); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1197 | } |
| 1198 | } |
| 1199 | } |
hpayer@chromium.org | c5d4971 | 2013-09-11 08:25:48 +0000 | [diff] [blame] | 1200 | |
| 1201 | private: |
| 1202 | Heap* heap_; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1203 | }; |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 1204 | |
| 1205 | |
hpayer@chromium.org | c5d4971 | 2013-09-11 08:25:48 +0000 | [diff] [blame] | 1206 | static void VerifyNonPointerSpacePointers(Heap* heap) { |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 1207 | // Verify that there are no pointers to new space in spaces where we |
| 1208 | // do not expect them. |
hpayer@chromium.org | c5d4971 | 2013-09-11 08:25:48 +0000 | [diff] [blame] | 1209 | VerifyNonPointerSpacePointersVisitor v(heap); |
| 1210 | HeapObjectIterator code_it(heap->code_space()); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1211 | for (HeapObject* object = code_it.Next(); |
| 1212 | object != NULL; object = code_it.Next()) |
christian.plesner.hansen@gmail.com | 2bc58ef | 2009-09-22 10:00:30 +0000 | [diff] [blame] | 1213 | object->Iterate(&v); |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 1214 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1215 | // The old data space was normally swept conservatively so that the iterator |
| 1216 | // doesn't work, so we normally skip the next bit. |
hpayer@chromium.org | c5d4971 | 2013-09-11 08:25:48 +0000 | [diff] [blame] | 1217 | if (!heap->old_data_space()->was_swept_conservatively()) { |
| 1218 | HeapObjectIterator data_it(heap->old_data_space()); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1219 | for (HeapObject* object = data_it.Next(); |
| 1220 | object != NULL; object = data_it.Next()) |
| 1221 | object->Iterate(&v); |
| 1222 | } |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 1223 | } |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 1224 | #endif // VERIFY_HEAP |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1225 | |
kasperl@chromium.org | defbd10 | 2009-07-13 14:04:26 +0000 | [diff] [blame] | 1226 | |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 1227 | void Heap::CheckNewSpaceExpansionCriteria() { |
| 1228 | if (new_space_.Capacity() < new_space_.MaximumCapacity() && |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 1229 | survived_since_last_expansion_ > new_space_.Capacity() && |
| 1230 | !new_space_high_promotion_mode_active_) { |
| 1231 | // Grow the size of new space if there is room to grow, enough data |
| 1232 | // has survived scavenge since the last expansion and we are not in |
| 1233 | // high promotion mode. |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 1234 | new_space_.Grow(); |
| 1235 | survived_since_last_expansion_ = 0; |
| 1236 | } |
| 1237 | } |
| 1238 | |
| 1239 | |
kmillikin@chromium.org | c53e10d | 2011-05-18 09:12:58 +0000 | [diff] [blame] | 1240 | static bool IsUnscavengedHeapObject(Heap* heap, Object** p) { |
| 1241 | return heap->InNewSpace(*p) && |
| 1242 | !HeapObject::cast(*p)->map_word().IsForwardingAddress(); |
| 1243 | } |
| 1244 | |
| 1245 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1246 | void Heap::ScavengeStoreBufferCallback( |
| 1247 | Heap* heap, |
| 1248 | MemoryChunk* page, |
| 1249 | StoreBufferEvent event) { |
| 1250 | heap->store_buffer_rebuilder_.Callback(page, event); |
| 1251 | } |
| 1252 | |
| 1253 | |
| 1254 | void StoreBufferRebuilder::Callback(MemoryChunk* page, StoreBufferEvent event) { |
| 1255 | if (event == kStoreBufferStartScanningPagesEvent) { |
| 1256 | start_of_current_page_ = NULL; |
| 1257 | current_page_ = NULL; |
| 1258 | } else if (event == kStoreBufferScanningPageEvent) { |
| 1259 | if (current_page_ != NULL) { |
| 1260 | // If this page already overflowed the store buffer during this iteration. |
| 1261 | if (current_page_->scan_on_scavenge()) { |
| 1262 | // Then we should wipe out the entries that have been added for it. |
| 1263 | store_buffer_->SetTop(start_of_current_page_); |
| 1264 | } else if (store_buffer_->Top() - start_of_current_page_ >= |
| 1265 | (store_buffer_->Limit() - store_buffer_->Top()) >> 2) { |
| 1266 | // Did we find too many pointers in the previous page? The heuristic is |
| 1267 | // that no page can take more then 1/5 the remaining slots in the store |
| 1268 | // buffer. |
| 1269 | current_page_->set_scan_on_scavenge(true); |
| 1270 | store_buffer_->SetTop(start_of_current_page_); |
| 1271 | } else { |
| 1272 | // In this case the page we scanned took a reasonable number of slots in |
| 1273 | // the store buffer. It has now been rehabilitated and is no longer |
| 1274 | // marked scan_on_scavenge. |
| 1275 | ASSERT(!current_page_->scan_on_scavenge()); |
| 1276 | } |
| 1277 | } |
| 1278 | start_of_current_page_ = store_buffer_->Top(); |
| 1279 | current_page_ = page; |
| 1280 | } else if (event == kStoreBufferFullEvent) { |
| 1281 | // The current page overflowed the store buffer again. Wipe out its entries |
| 1282 | // in the store buffer and mark it scan-on-scavenge again. This may happen |
| 1283 | // several times while scanning. |
| 1284 | if (current_page_ == NULL) { |
| 1285 | // Store Buffer overflowed while scanning promoted objects. These are not |
| 1286 | // in any particular page, though they are likely to be clustered by the |
| 1287 | // allocation routines. |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1288 | store_buffer_->EnsureSpace(StoreBuffer::kStoreBufferSize / 2); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1289 | } else { |
| 1290 | // Store Buffer overflowed while scanning a particular old space page for |
| 1291 | // pointers to new space. |
| 1292 | ASSERT(current_page_ == page); |
| 1293 | ASSERT(page != NULL); |
| 1294 | current_page_->set_scan_on_scavenge(true); |
| 1295 | ASSERT(start_of_current_page_ != store_buffer_->Top()); |
| 1296 | store_buffer_->SetTop(start_of_current_page_); |
| 1297 | } |
| 1298 | } else { |
| 1299 | UNREACHABLE(); |
| 1300 | } |
| 1301 | } |
| 1302 | |
| 1303 | |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 1304 | void PromotionQueue::Initialize() { |
| 1305 | // Assumes that a NewSpacePage exactly fits a number of promotion queue |
| 1306 | // entries (where each is a pair of intptr_t). This allows us to simplify |
| 1307 | // the test fpr when to switch pages. |
| 1308 | ASSERT((Page::kPageSize - MemoryChunk::kBodyOffset) % (2 * kPointerSize) |
| 1309 | == 0); |
| 1310 | limit_ = reinterpret_cast<intptr_t*>(heap_->new_space()->ToSpaceStart()); |
| 1311 | front_ = rear_ = |
| 1312 | reinterpret_cast<intptr_t*>(heap_->new_space()->ToSpaceEnd()); |
| 1313 | emergency_stack_ = NULL; |
| 1314 | guard_ = false; |
| 1315 | } |
| 1316 | |
| 1317 | |
| 1318 | void PromotionQueue::RelocateQueueHead() { |
| 1319 | ASSERT(emergency_stack_ == NULL); |
| 1320 | |
| 1321 | Page* p = Page::FromAllocationTop(reinterpret_cast<Address>(rear_)); |
| 1322 | intptr_t* head_start = rear_; |
| 1323 | intptr_t* head_end = |
yangguo@chromium.org | ab30bb8 | 2012-02-24 14:41:46 +0000 | [diff] [blame] | 1324 | Min(front_, reinterpret_cast<intptr_t*>(p->area_end())); |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 1325 | |
| 1326 | int entries_count = |
| 1327 | static_cast<int>(head_end - head_start) / kEntrySizeInWords; |
| 1328 | |
| 1329 | emergency_stack_ = new List<Entry>(2 * entries_count); |
| 1330 | |
| 1331 | while (head_start != head_end) { |
| 1332 | int size = static_cast<int>(*(head_start++)); |
| 1333 | HeapObject* obj = reinterpret_cast<HeapObject*>(*(head_start++)); |
| 1334 | emergency_stack_->Add(Entry(obj, size)); |
| 1335 | } |
| 1336 | rear_ = head_end; |
| 1337 | } |
| 1338 | |
| 1339 | |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 1340 | class ScavengeWeakObjectRetainer : public WeakObjectRetainer { |
| 1341 | public: |
| 1342 | explicit ScavengeWeakObjectRetainer(Heap* heap) : heap_(heap) { } |
| 1343 | |
| 1344 | virtual Object* RetainAs(Object* object) { |
| 1345 | if (!heap_->InFromSpace(object)) { |
| 1346 | return object; |
| 1347 | } |
| 1348 | |
| 1349 | MapWord map_word = HeapObject::cast(object)->map_word(); |
| 1350 | if (map_word.IsForwardingAddress()) { |
| 1351 | return map_word.ToForwardingAddress(); |
| 1352 | } |
| 1353 | return NULL; |
| 1354 | } |
| 1355 | |
| 1356 | private: |
| 1357 | Heap* heap_; |
| 1358 | }; |
| 1359 | |
| 1360 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1361 | void Heap::Scavenge() { |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 1362 | RelocationLock relocation_lock(this); |
| 1363 | |
jkummerow@chromium.org | d8a3a14 | 2013-10-03 12:15:05 +0000 | [diff] [blame] | 1364 | allocation_mementos_found_ = 0; |
jkummerow@chromium.org | fb7a7c4 | 2013-10-02 11:41:02 +0000 | [diff] [blame] | 1365 | |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 1366 | #ifdef VERIFY_HEAP |
hpayer@chromium.org | c5d4971 | 2013-09-11 08:25:48 +0000 | [diff] [blame] | 1367 | if (FLAG_verify_heap) VerifyNonPointerSpacePointers(this); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1368 | #endif |
| 1369 | |
| 1370 | gc_state_ = SCAVENGE; |
| 1371 | |
| 1372 | // Implements Cheney's copying algorithm |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1373 | LOG(isolate_, ResourceEvent("scavenge", "begin")); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1374 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1375 | // Clear descriptor cache. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1376 | isolate_->descriptor_lookup_cache()->Clear(); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1377 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1378 | // Used for updating survived_since_last_expansion_ at function end. |
yangguo@chromium.org | 659ceec | 2012-01-26 07:37:54 +0000 | [diff] [blame] | 1379 | intptr_t survived_watermark = PromotedSpaceSizeOfObjects(); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1380 | |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 1381 | CheckNewSpaceExpansionCriteria(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1382 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1383 | SelectScavengingVisitorsTable(); |
| 1384 | |
| 1385 | incremental_marking()->PrepareForScavenge(); |
| 1386 | |
mstarzinger@chromium.org | e3b8d0f | 2013-02-01 09:06:41 +0000 | [diff] [blame] | 1387 | paged_space(OLD_DATA_SPACE)->EnsureSweeperProgress(new_space_.Size()); |
| 1388 | paged_space(OLD_POINTER_SPACE)->EnsureSweeperProgress(new_space_.Size()); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1389 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1390 | // Flip the semispaces. After flipping, to space is empty, from space has |
| 1391 | // live objects. |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 1392 | new_space_.Flip(); |
| 1393 | new_space_.ResetAllocationInfo(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1394 | |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 1395 | // We need to sweep newly copied objects which can be either in the |
| 1396 | // to space or promoted to the old generation. For to-space |
| 1397 | // objects, we treat the bottom of the to space as a queue. Newly |
| 1398 | // copied and unswept objects lie between a 'front' mark and the |
| 1399 | // allocation pointer. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1400 | // |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 1401 | // Promoted objects can go into various old-generation spaces, and |
| 1402 | // can be allocated internally in the spaces (from the free list). |
| 1403 | // We treat the top of the to space as a queue of addresses of |
| 1404 | // promoted objects. The addresses of newly promoted and unswept |
| 1405 | // objects lie between a 'front' mark and a 'rear' mark that is |
| 1406 | // updated as a side effect of promoting an object. |
| 1407 | // |
| 1408 | // There is guaranteed to be enough room at the top of the to space |
| 1409 | // for the addresses of promoted objects: every object promoted |
| 1410 | // frees up its size in bytes from the top of the new space, and |
| 1411 | // objects are at least one pointer in size. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1412 | Address new_space_front = new_space_.ToSpaceStart(); |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 1413 | promotion_queue_.Initialize(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1414 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1415 | #ifdef DEBUG |
| 1416 | store_buffer()->Clean(); |
| 1417 | #endif |
| 1418 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1419 | ScavengeVisitor scavenge_visitor(this); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1420 | // Copy roots. |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 1421 | IterateRoots(&scavenge_visitor, VISIT_ALL_IN_SCAVENGE); |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 1422 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1423 | // Copy objects reachable from the old generation. |
| 1424 | { |
| 1425 | StoreBufferRebuildScope scope(this, |
| 1426 | store_buffer(), |
| 1427 | &ScavengeStoreBufferCallback); |
| 1428 | store_buffer()->IteratePointersToNewSpace(&ScavengeObject); |
| 1429 | } |
kasperl@chromium.org | defbd10 | 2009-07-13 14:04:26 +0000 | [diff] [blame] | 1430 | |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1431 | // Copy objects reachable from simple cells by scavenging cell values |
| 1432 | // directly. |
kasperl@chromium.org | defbd10 | 2009-07-13 14:04:26 +0000 | [diff] [blame] | 1433 | HeapObjectIterator cell_iterator(cell_space_); |
jkummerow@chromium.org | 000f7fb | 2012-08-01 11:14:42 +0000 | [diff] [blame] | 1434 | for (HeapObject* heap_object = cell_iterator.Next(); |
| 1435 | heap_object != NULL; |
| 1436 | heap_object = cell_iterator.Next()) { |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1437 | if (heap_object->IsCell()) { |
| 1438 | Cell* cell = Cell::cast(heap_object); |
| 1439 | Address value_address = cell->ValueAddress(); |
| 1440 | scavenge_visitor.VisitPointer(reinterpret_cast<Object**>(value_address)); |
| 1441 | } |
| 1442 | } |
| 1443 | |
| 1444 | // Copy objects reachable from global property cells by scavenging global |
| 1445 | // property cell values directly. |
| 1446 | HeapObjectIterator js_global_property_cell_iterator(property_cell_space_); |
| 1447 | for (HeapObject* heap_object = js_global_property_cell_iterator.Next(); |
| 1448 | heap_object != NULL; |
| 1449 | heap_object = js_global_property_cell_iterator.Next()) { |
dslomov@chromium.org | b752d40 | 2013-06-18 11:54:54 +0000 | [diff] [blame] | 1450 | if (heap_object->IsPropertyCell()) { |
| 1451 | PropertyCell* cell = PropertyCell::cast(heap_object); |
jkummerow@chromium.org | 000f7fb | 2012-08-01 11:14:42 +0000 | [diff] [blame] | 1452 | Address value_address = cell->ValueAddress(); |
kasperl@chromium.org | defbd10 | 2009-07-13 14:04:26 +0000 | [diff] [blame] | 1453 | scavenge_visitor.VisitPointer(reinterpret_cast<Object**>(value_address)); |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1454 | Address type_address = cell->TypeAddress(); |
| 1455 | scavenge_visitor.VisitPointer(reinterpret_cast<Object**>(type_address)); |
kasperl@chromium.org | defbd10 | 2009-07-13 14:04:26 +0000 | [diff] [blame] | 1456 | } |
| 1457 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1458 | |
verwaest@chromium.org | e4ee6de | 2012-11-06 12:13:00 +0000 | [diff] [blame] | 1459 | // Copy objects reachable from the code flushing candidates list. |
| 1460 | MarkCompactCollector* collector = mark_compact_collector(); |
| 1461 | if (collector->is_code_flushing_enabled()) { |
| 1462 | collector->code_flusher()->IteratePointersToFromSpace(&scavenge_visitor); |
| 1463 | } |
| 1464 | |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 1465 | // Scavenge object reachable from the native contexts list directly. |
| 1466 | scavenge_visitor.VisitPointer(BitCast<Object**>(&native_contexts_list_)); |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 1467 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 1468 | new_space_front = DoScavenge(&scavenge_visitor, new_space_front); |
mvstanton@chromium.org | e4ac3ef | 2012-11-12 14:53:34 +0000 | [diff] [blame] | 1469 | |
mmassi@chromium.org | 49a4467 | 2012-12-04 13:52:03 +0000 | [diff] [blame] | 1470 | while (isolate()->global_handles()->IterateObjectGroups( |
| 1471 | &scavenge_visitor, &IsUnscavengedHeapObject)) { |
mvstanton@chromium.org | e4ac3ef | 2012-11-12 14:53:34 +0000 | [diff] [blame] | 1472 | new_space_front = DoScavenge(&scavenge_visitor, new_space_front); |
| 1473 | } |
| 1474 | isolate()->global_handles()->RemoveObjectGroups(); |
yangguo@chromium.org | 003650e | 2013-01-24 16:31:08 +0000 | [diff] [blame] | 1475 | isolate()->global_handles()->RemoveImplicitRefGroups(); |
mvstanton@chromium.org | e4ac3ef | 2012-11-12 14:53:34 +0000 | [diff] [blame] | 1476 | |
jkummerow@chromium.org | e297f59 | 2011-06-08 10:05:15 +0000 | [diff] [blame] | 1477 | isolate_->global_handles()->IdentifyNewSpaceWeakIndependentHandles( |
kmillikin@chromium.org | c53e10d | 2011-05-18 09:12:58 +0000 | [diff] [blame] | 1478 | &IsUnscavengedHeapObject); |
jkummerow@chromium.org | e297f59 | 2011-06-08 10:05:15 +0000 | [diff] [blame] | 1479 | isolate_->global_handles()->IterateNewSpaceWeakIndependentRoots( |
| 1480 | &scavenge_visitor); |
kmillikin@chromium.org | c53e10d | 2011-05-18 09:12:58 +0000 | [diff] [blame] | 1481 | new_space_front = DoScavenge(&scavenge_visitor, new_space_front); |
| 1482 | |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 1483 | UpdateNewSpaceReferencesInExternalStringTable( |
| 1484 | &UpdateNewSpaceReferenceInExternalStringTableEntry); |
| 1485 | |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 1486 | promotion_queue_.Destroy(); |
| 1487 | |
yangguo@chromium.org | 78d1ad4 | 2012-02-09 13:53:47 +0000 | [diff] [blame] | 1488 | if (!FLAG_watch_ic_patching) { |
| 1489 | isolate()->runtime_profiler()->UpdateSamplesAfterScavenge(); |
| 1490 | } |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1491 | incremental_marking()->UpdateMarkingDequeAfterScavenge(); |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 1492 | |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 1493 | ScavengeWeakObjectRetainer weak_object_retainer(this); |
| 1494 | ProcessWeakReferences(&weak_object_retainer); |
| 1495 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 1496 | ASSERT(new_space_front == new_space_.top()); |
| 1497 | |
| 1498 | // Set age mark. |
| 1499 | new_space_.set_age_mark(new_space_.top()); |
| 1500 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1501 | new_space_.LowerInlineAllocationLimit( |
| 1502 | new_space_.inline_allocation_limit_step()); |
| 1503 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 1504 | // Update how much has survived scavenge. |
kmillikin@chromium.org | f05f291 | 2010-09-30 10:07:24 +0000 | [diff] [blame] | 1505 | IncrementYoungSurvivorsCounter(static_cast<int>( |
yangguo@chromium.org | 659ceec | 2012-01-26 07:37:54 +0000 | [diff] [blame] | 1506 | (PromotedSpaceSizeOfObjects() - survived_watermark) + new_space_.Size())); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 1507 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1508 | LOG(isolate_, ResourceEvent("scavenge", "end")); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 1509 | |
| 1510 | gc_state_ = NOT_IN_GC; |
svenpanne@chromium.org | ecb9dd6 | 2011-12-01 08:22:35 +0000 | [diff] [blame] | 1511 | |
| 1512 | scavenges_since_last_idle_round_++; |
jkummerow@chromium.org | fb7a7c4 | 2013-10-02 11:41:02 +0000 | [diff] [blame] | 1513 | |
jkummerow@chromium.org | d8a3a14 | 2013-10-03 12:15:05 +0000 | [diff] [blame] | 1514 | if (FLAG_trace_track_allocation_sites && allocation_mementos_found_ > 0) { |
jkummerow@chromium.org | fb7a7c4 | 2013-10-02 11:41:02 +0000 | [diff] [blame] | 1515 | PrintF("AllocationMementos found during scavenge = %d\n", |
jkummerow@chromium.org | d8a3a14 | 2013-10-03 12:15:05 +0000 | [diff] [blame] | 1516 | allocation_mementos_found_); |
jkummerow@chromium.org | fb7a7c4 | 2013-10-02 11:41:02 +0000 | [diff] [blame] | 1517 | } |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 1518 | } |
| 1519 | |
| 1520 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1521 | String* Heap::UpdateNewSpaceReferenceInExternalStringTableEntry(Heap* heap, |
| 1522 | Object** p) { |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 1523 | MapWord first_word = HeapObject::cast(*p)->map_word(); |
| 1524 | |
| 1525 | if (!first_word.IsForwardingAddress()) { |
| 1526 | // Unreachable external string can be finalized. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1527 | heap->FinalizeExternalString(String::cast(*p)); |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 1528 | return NULL; |
| 1529 | } |
| 1530 | |
| 1531 | // String is still reachable. |
| 1532 | return String::cast(first_word.ToForwardingAddress()); |
| 1533 | } |
| 1534 | |
| 1535 | |
| 1536 | void Heap::UpdateNewSpaceReferencesInExternalStringTable( |
| 1537 | ExternalStringTableUpdaterCallback updater_func) { |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 1538 | #ifdef VERIFY_HEAP |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 1539 | if (FLAG_verify_heap) { |
| 1540 | external_string_table_.Verify(); |
| 1541 | } |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 1542 | #endif |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 1543 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1544 | if (external_string_table_.new_space_strings_.is_empty()) return; |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 1545 | |
danno@chromium.org | 2ab0c3b | 2012-10-05 08:50:56 +0000 | [diff] [blame] | 1546 | Object** start = &external_string_table_.new_space_strings_[0]; |
| 1547 | Object** end = start + external_string_table_.new_space_strings_.length(); |
| 1548 | Object** last = start; |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 1549 | |
danno@chromium.org | 2ab0c3b | 2012-10-05 08:50:56 +0000 | [diff] [blame] | 1550 | for (Object** p = start; p < end; ++p) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1551 | ASSERT(InFromSpace(*p)); |
| 1552 | String* target = updater_func(this, p); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 1553 | |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 1554 | if (target == NULL) continue; |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 1555 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 1556 | ASSERT(target->IsExternalString()); |
| 1557 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1558 | if (InNewSpace(target)) { |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 1559 | // String is still in new space. Update the table entry. |
| 1560 | *last = target; |
| 1561 | ++last; |
| 1562 | } else { |
| 1563 | // String got promoted. Move it to the old string list. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1564 | external_string_table_.AddOldString(target); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 1565 | } |
| 1566 | } |
| 1567 | |
danno@chromium.org | 2ab0c3b | 2012-10-05 08:50:56 +0000 | [diff] [blame] | 1568 | ASSERT(last <= end); |
| 1569 | external_string_table_.ShrinkNewStrings(static_cast<int>(last - start)); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 1570 | } |
| 1571 | |
| 1572 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1573 | void Heap::UpdateReferencesInExternalStringTable( |
| 1574 | ExternalStringTableUpdaterCallback updater_func) { |
| 1575 | |
| 1576 | // Update old space string references. |
| 1577 | if (external_string_table_.old_space_strings_.length() > 0) { |
danno@chromium.org | 2ab0c3b | 2012-10-05 08:50:56 +0000 | [diff] [blame] | 1578 | Object** start = &external_string_table_.old_space_strings_[0]; |
| 1579 | Object** end = start + external_string_table_.old_space_strings_.length(); |
| 1580 | for (Object** p = start; p < end; ++p) *p = updater_func(this, p); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1581 | } |
| 1582 | |
| 1583 | UpdateNewSpaceReferencesInExternalStringTable(updater_func); |
| 1584 | } |
| 1585 | |
| 1586 | |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1587 | template <class T> |
| 1588 | struct WeakListVisitor; |
| 1589 | |
| 1590 | |
| 1591 | template <class T> |
| 1592 | static Object* VisitWeakList(Heap* heap, |
| 1593 | Object* list, |
| 1594 | WeakObjectRetainer* retainer, |
| 1595 | bool record_slots) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1596 | Object* undefined = heap->undefined_value(); |
| 1597 | Object* head = undefined; |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1598 | T* tail = NULL; |
| 1599 | MarkCompactCollector* collector = heap->mark_compact_collector(); |
| 1600 | while (list != undefined) { |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1601 | // Check whether to keep the candidate in the list. |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1602 | T* candidate = reinterpret_cast<T*>(list); |
| 1603 | Object* retained = retainer->RetainAs(list); |
| 1604 | if (retained != NULL) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1605 | if (head == undefined) { |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1606 | // First element in the list. |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1607 | head = retained; |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1608 | } else { |
| 1609 | // Subsequent elements in the list. |
| 1610 | ASSERT(tail != NULL); |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1611 | WeakListVisitor<T>::SetWeakNext(tail, retained); |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 1612 | if (record_slots) { |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1613 | Object** next_slot = |
| 1614 | HeapObject::RawField(tail, WeakListVisitor<T>::WeakNextOffset()); |
| 1615 | collector->RecordSlot(next_slot, next_slot, retained); |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 1616 | } |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1617 | } |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1618 | // Retained object is new tail. |
| 1619 | ASSERT(!retained->IsUndefined()); |
| 1620 | candidate = reinterpret_cast<T*>(retained); |
| 1621 | tail = candidate; |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1622 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1623 | |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1624 | // tail is a live object, visit it. |
| 1625 | WeakListVisitor<T>::VisitLiveObject( |
| 1626 | heap, tail, retainer, record_slots); |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 1627 | } else { |
| 1628 | WeakListVisitor<T>::VisitPhantomObject(heap, candidate); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1629 | } |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1630 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1631 | // Move to next element in the list. |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1632 | list = WeakListVisitor<T>::WeakNext(candidate); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1633 | } |
| 1634 | |
| 1635 | // Terminate the list if there is one or more elements. |
| 1636 | if (tail != NULL) { |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1637 | WeakListVisitor<T>::SetWeakNext(tail, undefined); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1638 | } |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1639 | return head; |
| 1640 | } |
| 1641 | |
| 1642 | |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1643 | template<> |
| 1644 | struct WeakListVisitor<JSFunction> { |
| 1645 | static void SetWeakNext(JSFunction* function, Object* next) { |
| 1646 | function->set_next_function_link(next); |
| 1647 | } |
| 1648 | |
| 1649 | static Object* WeakNext(JSFunction* function) { |
| 1650 | return function->next_function_link(); |
| 1651 | } |
| 1652 | |
| 1653 | static int WeakNextOffset() { |
| 1654 | return JSFunction::kNextFunctionLinkOffset; |
| 1655 | } |
| 1656 | |
| 1657 | static void VisitLiveObject(Heap*, JSFunction*, |
| 1658 | WeakObjectRetainer*, bool) { |
| 1659 | } |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 1660 | |
| 1661 | static void VisitPhantomObject(Heap*, JSFunction*) { |
| 1662 | } |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1663 | }; |
| 1664 | |
| 1665 | |
| 1666 | template<> |
jkummerow@chromium.org | 3d00d0a | 2013-09-04 13:57:32 +0000 | [diff] [blame] | 1667 | struct WeakListVisitor<Code> { |
| 1668 | static void SetWeakNext(Code* code, Object* next) { |
| 1669 | code->set_next_code_link(next); |
| 1670 | } |
| 1671 | |
| 1672 | static Object* WeakNext(Code* code) { |
| 1673 | return code->next_code_link(); |
| 1674 | } |
| 1675 | |
| 1676 | static int WeakNextOffset() { |
| 1677 | return Code::kNextCodeLinkOffset; |
| 1678 | } |
| 1679 | |
| 1680 | static void VisitLiveObject(Heap*, Code*, |
| 1681 | WeakObjectRetainer*, bool) { |
| 1682 | } |
| 1683 | |
| 1684 | static void VisitPhantomObject(Heap*, Code*) { |
| 1685 | } |
| 1686 | }; |
| 1687 | |
| 1688 | |
| 1689 | template<> |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1690 | struct WeakListVisitor<Context> { |
| 1691 | static void SetWeakNext(Context* context, Object* next) { |
| 1692 | context->set(Context::NEXT_CONTEXT_LINK, |
| 1693 | next, |
| 1694 | UPDATE_WRITE_BARRIER); |
| 1695 | } |
| 1696 | |
| 1697 | static Object* WeakNext(Context* context) { |
| 1698 | return context->get(Context::NEXT_CONTEXT_LINK); |
| 1699 | } |
| 1700 | |
| 1701 | static void VisitLiveObject(Heap* heap, |
| 1702 | Context* context, |
| 1703 | WeakObjectRetainer* retainer, |
| 1704 | bool record_slots) { |
jkummerow@chromium.org | 3d00d0a | 2013-09-04 13:57:32 +0000 | [diff] [blame] | 1705 | // Process the three weak lists linked off the context. |
| 1706 | DoWeakList<JSFunction>(heap, context, retainer, record_slots, |
| 1707 | Context::OPTIMIZED_FUNCTIONS_LIST); |
| 1708 | DoWeakList<Code>(heap, context, retainer, record_slots, |
| 1709 | Context::OPTIMIZED_CODE_LIST); |
| 1710 | DoWeakList<Code>(heap, context, retainer, record_slots, |
| 1711 | Context::DEOPTIMIZED_CODE_LIST); |
| 1712 | } |
| 1713 | |
| 1714 | template<class T> |
| 1715 | static void DoWeakList(Heap* heap, |
| 1716 | Context* context, |
| 1717 | WeakObjectRetainer* retainer, |
| 1718 | bool record_slots, |
| 1719 | int index) { |
| 1720 | // Visit the weak list, removing dead intermediate elements. |
| 1721 | Object* list_head = VisitWeakList<T>(heap, context->get(index), retainer, |
| 1722 | record_slots); |
| 1723 | |
| 1724 | // Update the list head. |
| 1725 | context->set(index, list_head, UPDATE_WRITE_BARRIER); |
| 1726 | |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1727 | if (record_slots) { |
jkummerow@chromium.org | 3d00d0a | 2013-09-04 13:57:32 +0000 | [diff] [blame] | 1728 | // Record the updated slot if necessary. |
| 1729 | Object** head_slot = HeapObject::RawField( |
| 1730 | context, FixedArray::SizeFor(index)); |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1731 | heap->mark_compact_collector()->RecordSlot( |
jkummerow@chromium.org | 3d00d0a | 2013-09-04 13:57:32 +0000 | [diff] [blame] | 1732 | head_slot, head_slot, list_head); |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1733 | } |
| 1734 | } |
| 1735 | |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 1736 | static void VisitPhantomObject(Heap*, Context*) { |
| 1737 | } |
| 1738 | |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1739 | static int WeakNextOffset() { |
| 1740 | return FixedArray::SizeFor(Context::NEXT_CONTEXT_LINK); |
| 1741 | } |
| 1742 | }; |
| 1743 | |
| 1744 | |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 1745 | void Heap::ProcessWeakReferences(WeakObjectRetainer* retainer) { |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 1746 | // We don't record weak slots during marking or scavenges. |
| 1747 | // Instead we do it once when we complete mark-compact cycle. |
| 1748 | // Note that write barrier has no effect if we are already in the middle of |
| 1749 | // compacting mark-sweep cycle and we have to record slots manually. |
| 1750 | bool record_slots = |
| 1751 | gc_state() == MARK_COMPACT && |
| 1752 | mark_compact_collector()->is_compacting(); |
danno@chromium.org | 1fd77d5 | 2013-06-07 16:01:45 +0000 | [diff] [blame] | 1753 | ProcessArrayBuffers(retainer, record_slots); |
| 1754 | ProcessNativeContexts(retainer, record_slots); |
jkummerow@chromium.org | ba72ec8 | 2013-07-22 09:21:20 +0000 | [diff] [blame] | 1755 | ProcessAllocationSites(retainer, record_slots); |
danno@chromium.org | 1fd77d5 | 2013-06-07 16:01:45 +0000 | [diff] [blame] | 1756 | } |
| 1757 | |
| 1758 | void Heap::ProcessNativeContexts(WeakObjectRetainer* retainer, |
| 1759 | bool record_slots) { |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1760 | Object* head = |
| 1761 | VisitWeakList<Context>( |
| 1762 | this, native_contexts_list(), retainer, record_slots); |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 1763 | // Update the head of the list of contexts. |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 1764 | native_contexts_list_ = head; |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 1765 | } |
| 1766 | |
| 1767 | |
danno@chromium.org | 1fd77d5 | 2013-06-07 16:01:45 +0000 | [diff] [blame] | 1768 | template<> |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 1769 | struct WeakListVisitor<JSArrayBufferView> { |
| 1770 | static void SetWeakNext(JSArrayBufferView* obj, Object* next) { |
danno@chromium.org | 1fd77d5 | 2013-06-07 16:01:45 +0000 | [diff] [blame] | 1771 | obj->set_weak_next(next); |
| 1772 | } |
| 1773 | |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 1774 | static Object* WeakNext(JSArrayBufferView* obj) { |
danno@chromium.org | 1fd77d5 | 2013-06-07 16:01:45 +0000 | [diff] [blame] | 1775 | return obj->weak_next(); |
| 1776 | } |
| 1777 | |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1778 | static void VisitLiveObject(Heap*, |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 1779 | JSArrayBufferView* obj, |
danno@chromium.org | 1fd77d5 | 2013-06-07 16:01:45 +0000 | [diff] [blame] | 1780 | WeakObjectRetainer* retainer, |
| 1781 | bool record_slots) {} |
| 1782 | |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 1783 | static void VisitPhantomObject(Heap*, JSArrayBufferView*) {} |
| 1784 | |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1785 | static int WeakNextOffset() { |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 1786 | return JSArrayBufferView::kWeakNextOffset; |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1787 | } |
danno@chromium.org | 1fd77d5 | 2013-06-07 16:01:45 +0000 | [diff] [blame] | 1788 | }; |
| 1789 | |
| 1790 | |
| 1791 | template<> |
| 1792 | struct WeakListVisitor<JSArrayBuffer> { |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1793 | static void SetWeakNext(JSArrayBuffer* obj, Object* next) { |
danno@chromium.org | 1fd77d5 | 2013-06-07 16:01:45 +0000 | [diff] [blame] | 1794 | obj->set_weak_next(next); |
| 1795 | } |
| 1796 | |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1797 | static Object* WeakNext(JSArrayBuffer* obj) { |
danno@chromium.org | 1fd77d5 | 2013-06-07 16:01:45 +0000 | [diff] [blame] | 1798 | return obj->weak_next(); |
| 1799 | } |
| 1800 | |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1801 | static void VisitLiveObject(Heap* heap, |
| 1802 | JSArrayBuffer* array_buffer, |
danno@chromium.org | 1fd77d5 | 2013-06-07 16:01:45 +0000 | [diff] [blame] | 1803 | WeakObjectRetainer* retainer, |
| 1804 | bool record_slots) { |
| 1805 | Object* typed_array_obj = |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 1806 | VisitWeakList<JSArrayBufferView>( |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1807 | heap, |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 1808 | array_buffer->weak_first_view(), |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1809 | retainer, record_slots); |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 1810 | array_buffer->set_weak_first_view(typed_array_obj); |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1811 | if (typed_array_obj != heap->undefined_value() && record_slots) { |
danno@chromium.org | 1fd77d5 | 2013-06-07 16:01:45 +0000 | [diff] [blame] | 1812 | Object** slot = HeapObject::RawField( |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 1813 | array_buffer, JSArrayBuffer::kWeakFirstViewOffset); |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1814 | heap->mark_compact_collector()->RecordSlot(slot, slot, typed_array_obj); |
danno@chromium.org | 1fd77d5 | 2013-06-07 16:01:45 +0000 | [diff] [blame] | 1815 | } |
| 1816 | } |
| 1817 | |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 1818 | static void VisitPhantomObject(Heap* heap, JSArrayBuffer* phantom) { |
| 1819 | Runtime::FreeArrayBuffer(heap->isolate(), phantom); |
| 1820 | } |
| 1821 | |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1822 | static int WeakNextOffset() { |
| 1823 | return JSArrayBuffer::kWeakNextOffset; |
| 1824 | } |
danno@chromium.org | 1fd77d5 | 2013-06-07 16:01:45 +0000 | [diff] [blame] | 1825 | }; |
| 1826 | |
| 1827 | |
| 1828 | void Heap::ProcessArrayBuffers(WeakObjectRetainer* retainer, |
| 1829 | bool record_slots) { |
| 1830 | Object* array_buffer_obj = |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 1831 | VisitWeakList<JSArrayBuffer>(this, |
| 1832 | array_buffers_list(), |
danno@chromium.org | 1fd77d5 | 2013-06-07 16:01:45 +0000 | [diff] [blame] | 1833 | retainer, record_slots); |
| 1834 | set_array_buffers_list(array_buffer_obj); |
| 1835 | } |
| 1836 | |
| 1837 | |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 1838 | void Heap::TearDownArrayBuffers() { |
| 1839 | Object* undefined = undefined_value(); |
| 1840 | for (Object* o = array_buffers_list(); o != undefined;) { |
| 1841 | JSArrayBuffer* buffer = JSArrayBuffer::cast(o); |
| 1842 | Runtime::FreeArrayBuffer(isolate(), buffer); |
| 1843 | o = buffer->weak_next(); |
| 1844 | } |
| 1845 | array_buffers_list_ = undefined; |
| 1846 | } |
| 1847 | |
| 1848 | |
jkummerow@chromium.org | ba72ec8 | 2013-07-22 09:21:20 +0000 | [diff] [blame] | 1849 | template<> |
| 1850 | struct WeakListVisitor<AllocationSite> { |
| 1851 | static void SetWeakNext(AllocationSite* obj, Object* next) { |
| 1852 | obj->set_weak_next(next); |
| 1853 | } |
| 1854 | |
| 1855 | static Object* WeakNext(AllocationSite* obj) { |
| 1856 | return obj->weak_next(); |
| 1857 | } |
| 1858 | |
| 1859 | static void VisitLiveObject(Heap* heap, |
| 1860 | AllocationSite* array_buffer, |
| 1861 | WeakObjectRetainer* retainer, |
| 1862 | bool record_slots) {} |
| 1863 | |
| 1864 | static void VisitPhantomObject(Heap* heap, AllocationSite* phantom) {} |
| 1865 | |
| 1866 | static int WeakNextOffset() { |
| 1867 | return AllocationSite::kWeakNextOffset; |
| 1868 | } |
| 1869 | }; |
| 1870 | |
| 1871 | |
| 1872 | void Heap::ProcessAllocationSites(WeakObjectRetainer* retainer, |
| 1873 | bool record_slots) { |
| 1874 | Object* allocation_site_obj = |
| 1875 | VisitWeakList<AllocationSite>(this, |
| 1876 | allocation_sites_list(), |
| 1877 | retainer, record_slots); |
| 1878 | set_allocation_sites_list(allocation_site_obj); |
| 1879 | } |
| 1880 | |
| 1881 | |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 1882 | void Heap::VisitExternalResources(v8::ExternalResourceVisitor* visitor) { |
rossberg@chromium.org | 79e7902 | 2013-06-03 15:43:46 +0000 | [diff] [blame] | 1883 | DisallowHeapAllocation no_allocation; |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 1884 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 1885 | // Both the external string table and the string table may contain |
verwaest@chromium.org | e4ee6de | 2012-11-06 12:13:00 +0000 | [diff] [blame] | 1886 | // external strings, but neither lists them exhaustively, nor is the |
| 1887 | // intersection set empty. Therefore we iterate over the external string |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 1888 | // table first, ignoring internalized strings, and then over the |
| 1889 | // internalized string table. |
verwaest@chromium.org | e4ee6de | 2012-11-06 12:13:00 +0000 | [diff] [blame] | 1890 | |
| 1891 | class ExternalStringTableVisitorAdapter : public ObjectVisitor { |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 1892 | public: |
verwaest@chromium.org | e4ee6de | 2012-11-06 12:13:00 +0000 | [diff] [blame] | 1893 | explicit ExternalStringTableVisitorAdapter( |
| 1894 | v8::ExternalResourceVisitor* visitor) : visitor_(visitor) {} |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 1895 | virtual void VisitPointers(Object** start, Object** end) { |
| 1896 | for (Object** p = start; p < end; p++) { |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 1897 | // Visit non-internalized external strings, |
| 1898 | // since internalized strings are listed in the string table. |
| 1899 | if (!(*p)->IsInternalizedString()) { |
verwaest@chromium.org | e4ee6de | 2012-11-06 12:13:00 +0000 | [diff] [blame] | 1900 | ASSERT((*p)->IsExternalString()); |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 1901 | visitor_->VisitExternalString(Utils::ToLocal( |
| 1902 | Handle<String>(String::cast(*p)))); |
| 1903 | } |
| 1904 | } |
| 1905 | } |
| 1906 | private: |
| 1907 | v8::ExternalResourceVisitor* visitor_; |
verwaest@chromium.org | e4ee6de | 2012-11-06 12:13:00 +0000 | [diff] [blame] | 1908 | } external_string_table_visitor(visitor); |
| 1909 | |
| 1910 | external_string_table_.Iterate(&external_string_table_visitor); |
| 1911 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 1912 | class StringTableVisitorAdapter : public ObjectVisitor { |
verwaest@chromium.org | e4ee6de | 2012-11-06 12:13:00 +0000 | [diff] [blame] | 1913 | public: |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 1914 | explicit StringTableVisitorAdapter( |
verwaest@chromium.org | e4ee6de | 2012-11-06 12:13:00 +0000 | [diff] [blame] | 1915 | v8::ExternalResourceVisitor* visitor) : visitor_(visitor) {} |
| 1916 | virtual void VisitPointers(Object** start, Object** end) { |
| 1917 | for (Object** p = start; p < end; p++) { |
| 1918 | if ((*p)->IsExternalString()) { |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 1919 | ASSERT((*p)->IsInternalizedString()); |
verwaest@chromium.org | e4ee6de | 2012-11-06 12:13:00 +0000 | [diff] [blame] | 1920 | visitor_->VisitExternalString(Utils::ToLocal( |
| 1921 | Handle<String>(String::cast(*p)))); |
| 1922 | } |
| 1923 | } |
| 1924 | } |
| 1925 | private: |
| 1926 | v8::ExternalResourceVisitor* visitor_; |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 1927 | } string_table_visitor(visitor); |
verwaest@chromium.org | e4ee6de | 2012-11-06 12:13:00 +0000 | [diff] [blame] | 1928 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 1929 | string_table()->IterateElements(&string_table_visitor); |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 1930 | } |
| 1931 | |
| 1932 | |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 1933 | class NewSpaceScavenger : public StaticNewSpaceVisitor<NewSpaceScavenger> { |
| 1934 | public: |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1935 | static inline void VisitPointer(Heap* heap, Object** p) { |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 1936 | Object* object = *p; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1937 | if (!heap->InNewSpace(object)) return; |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 1938 | Heap::ScavengeObject(reinterpret_cast<HeapObject**>(p), |
| 1939 | reinterpret_cast<HeapObject*>(object)); |
| 1940 | } |
| 1941 | }; |
| 1942 | |
| 1943 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 1944 | Address Heap::DoScavenge(ObjectVisitor* scavenge_visitor, |
| 1945 | Address new_space_front) { |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 1946 | do { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1947 | SemiSpace::AssertValidRange(new_space_front, new_space_.top()); |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 1948 | // The addresses new_space_front and new_space_.top() define a |
| 1949 | // queue of unprocessed copied objects. Process them until the |
| 1950 | // queue is empty. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1951 | while (new_space_front != new_space_.top()) { |
| 1952 | if (!NewSpacePage::IsAtEnd(new_space_front)) { |
| 1953 | HeapObject* object = HeapObject::FromAddress(new_space_front); |
| 1954 | new_space_front += |
| 1955 | NewSpaceScavenger::IterateBody(object->map(), object); |
| 1956 | } else { |
| 1957 | new_space_front = |
yangguo@chromium.org | ab30bb8 | 2012-02-24 14:41:46 +0000 | [diff] [blame] | 1958 | NewSpacePage::FromLimit(new_space_front)->next_page()->area_start(); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1959 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1960 | } |
| 1961 | |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 1962 | // Promote and process all the to-be-promoted objects. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1963 | { |
| 1964 | StoreBufferRebuildScope scope(this, |
| 1965 | store_buffer(), |
| 1966 | &ScavengeStoreBufferCallback); |
| 1967 | while (!promotion_queue()->is_empty()) { |
| 1968 | HeapObject* target; |
| 1969 | int size; |
| 1970 | promotion_queue()->remove(&target, &size); |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 1971 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1972 | // Promoted object might be already partially visited |
| 1973 | // during old space pointer iteration. Thus we search specificly |
| 1974 | // for pointers to from semispace instead of looking for pointers |
| 1975 | // to new space. |
| 1976 | ASSERT(!target->IsMap()); |
| 1977 | IterateAndMarkPointersToFromSpace(target->address(), |
| 1978 | target->address() + size, |
| 1979 | &ScavengeObject); |
| 1980 | } |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 1981 | } |
| 1982 | |
| 1983 | // Take another spin if there are now unswept objects in new space |
| 1984 | // (there are currently no more unswept promoted objects). |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1985 | } while (new_space_front != new_space_.top()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1986 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 1987 | return new_space_front; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1988 | } |
| 1989 | |
| 1990 | |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 1991 | STATIC_ASSERT((FixedDoubleArray::kHeaderSize & kDoubleAlignmentMask) == 0); |
mstarzinger@chromium.org | a2e1a40 | 2013-10-15 08:25:05 +0000 | [diff] [blame] | 1992 | STATIC_ASSERT((ConstantPoolArray::kHeaderSize & kDoubleAlignmentMask) == 0); |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 1993 | |
| 1994 | |
| 1995 | INLINE(static HeapObject* EnsureDoubleAligned(Heap* heap, |
| 1996 | HeapObject* object, |
| 1997 | int size)); |
| 1998 | |
| 1999 | static HeapObject* EnsureDoubleAligned(Heap* heap, |
| 2000 | HeapObject* object, |
| 2001 | int size) { |
| 2002 | if ((OffsetFrom(object->address()) & kDoubleAlignmentMask) != 0) { |
| 2003 | heap->CreateFillerObjectAt(object->address(), kPointerSize); |
| 2004 | return HeapObject::FromAddress(object->address() + kPointerSize); |
| 2005 | } else { |
| 2006 | heap->CreateFillerObjectAt(object->address() + size - kPointerSize, |
| 2007 | kPointerSize); |
| 2008 | return object; |
| 2009 | } |
| 2010 | } |
| 2011 | |
| 2012 | |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 2013 | enum LoggingAndProfiling { |
| 2014 | LOGGING_AND_PROFILING_ENABLED, |
| 2015 | LOGGING_AND_PROFILING_DISABLED |
| 2016 | }; |
| 2017 | |
| 2018 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2019 | enum MarksHandling { TRANSFER_MARKS, IGNORE_MARKS }; |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 2020 | |
| 2021 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2022 | template<MarksHandling marks_handling, |
| 2023 | LoggingAndProfiling logging_and_profiling_mode> |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2024 | class ScavengingVisitor : public StaticVisitorBase { |
| 2025 | public: |
| 2026 | static void Initialize() { |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 2027 | table_.Register(kVisitSeqOneByteString, &EvacuateSeqOneByteString); |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2028 | table_.Register(kVisitSeqTwoByteString, &EvacuateSeqTwoByteString); |
| 2029 | table_.Register(kVisitShortcutCandidate, &EvacuateShortcutCandidate); |
| 2030 | table_.Register(kVisitByteArray, &EvacuateByteArray); |
| 2031 | table_.Register(kVisitFixedArray, &EvacuateFixedArray); |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 2032 | table_.Register(kVisitFixedDoubleArray, &EvacuateFixedDoubleArray); |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 2033 | |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 2034 | table_.Register(kVisitNativeContext, |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 2035 | &ObjectEvacuationStrategy<POINTER_OBJECT>:: |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 2036 | template VisitSpecialized<Context::kSize>); |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2037 | |
| 2038 | table_.Register(kVisitConsString, |
| 2039 | &ObjectEvacuationStrategy<POINTER_OBJECT>:: |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 2040 | template VisitSpecialized<ConsString::kSize>); |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2041 | |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 2042 | table_.Register(kVisitSlicedString, |
| 2043 | &ObjectEvacuationStrategy<POINTER_OBJECT>:: |
| 2044 | template VisitSpecialized<SlicedString::kSize>); |
| 2045 | |
mstarzinger@chromium.org | f705b50 | 2013-04-04 11:38:09 +0000 | [diff] [blame] | 2046 | table_.Register(kVisitSymbol, |
| 2047 | &ObjectEvacuationStrategy<POINTER_OBJECT>:: |
| 2048 | template VisitSpecialized<Symbol::kSize>); |
| 2049 | |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2050 | table_.Register(kVisitSharedFunctionInfo, |
| 2051 | &ObjectEvacuationStrategy<POINTER_OBJECT>:: |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 2052 | template VisitSpecialized<SharedFunctionInfo::kSize>); |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2053 | |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 2054 | table_.Register(kVisitJSWeakMap, |
| 2055 | &ObjectEvacuationStrategy<POINTER_OBJECT>:: |
| 2056 | Visit); |
| 2057 | |
jkummerow@chromium.org | ba72ec8 | 2013-07-22 09:21:20 +0000 | [diff] [blame] | 2058 | table_.Register(kVisitJSWeakSet, |
| 2059 | &ObjectEvacuationStrategy<POINTER_OBJECT>:: |
| 2060 | Visit); |
| 2061 | |
danno@chromium.org | 1fd77d5 | 2013-06-07 16:01:45 +0000 | [diff] [blame] | 2062 | table_.Register(kVisitJSArrayBuffer, |
| 2063 | &ObjectEvacuationStrategy<POINTER_OBJECT>:: |
| 2064 | Visit); |
| 2065 | |
| 2066 | table_.Register(kVisitJSTypedArray, |
| 2067 | &ObjectEvacuationStrategy<POINTER_OBJECT>:: |
| 2068 | Visit); |
| 2069 | |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 2070 | table_.Register(kVisitJSDataView, |
| 2071 | &ObjectEvacuationStrategy<POINTER_OBJECT>:: |
| 2072 | Visit); |
| 2073 | |
jkummerow@chromium.org | ddda9e8 | 2011-07-06 11:27:02 +0000 | [diff] [blame] | 2074 | table_.Register(kVisitJSRegExp, |
| 2075 | &ObjectEvacuationStrategy<POINTER_OBJECT>:: |
| 2076 | Visit); |
| 2077 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2078 | if (marks_handling == IGNORE_MARKS) { |
| 2079 | table_.Register(kVisitJSFunction, |
| 2080 | &ObjectEvacuationStrategy<POINTER_OBJECT>:: |
| 2081 | template VisitSpecialized<JSFunction::kSize>); |
| 2082 | } else { |
| 2083 | table_.Register(kVisitJSFunction, &EvacuateJSFunction); |
| 2084 | } |
ricow@chromium.org | 0b9f850 | 2010-08-18 07:45:01 +0000 | [diff] [blame] | 2085 | |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2086 | table_.RegisterSpecializations<ObjectEvacuationStrategy<DATA_OBJECT>, |
| 2087 | kVisitDataObject, |
| 2088 | kVisitDataObjectGeneric>(); |
| 2089 | |
| 2090 | table_.RegisterSpecializations<ObjectEvacuationStrategy<POINTER_OBJECT>, |
| 2091 | kVisitJSObject, |
| 2092 | kVisitJSObjectGeneric>(); |
| 2093 | |
| 2094 | table_.RegisterSpecializations<ObjectEvacuationStrategy<POINTER_OBJECT>, |
| 2095 | kVisitStruct, |
| 2096 | kVisitStructGeneric>(); |
| 2097 | } |
| 2098 | |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 2099 | static VisitorDispatchTable<ScavengingCallback>* GetTable() { |
| 2100 | return &table_; |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2101 | } |
| 2102 | |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2103 | private: |
| 2104 | enum ObjectContents { DATA_OBJECT, POINTER_OBJECT }; |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2105 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2106 | static void RecordCopiedObject(Heap* heap, HeapObject* obj) { |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2107 | bool should_record = false; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2108 | #ifdef DEBUG |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2109 | should_record = FLAG_heap_stats; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2110 | #endif |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2111 | should_record = should_record || FLAG_log_gc; |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2112 | if (should_record) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2113 | if (heap->new_space()->Contains(obj)) { |
| 2114 | heap->new_space()->RecordAllocation(obj); |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2115 | } else { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2116 | heap->new_space()->RecordPromotion(obj); |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2117 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2118 | } |
| 2119 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2120 | |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2121 | // Helper function used by CopyObject to copy a source object to an |
| 2122 | // allocated target object and update the forwarding pointer in the source |
| 2123 | // object. Returns the target object. |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 2124 | INLINE(static void MigrateObject(Heap* heap, |
| 2125 | HeapObject* source, |
| 2126 | HeapObject* target, |
| 2127 | int size)) { |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2128 | // Copy the content of source to target. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2129 | heap->CopyBlock(target->address(), source->address(), size); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2130 | |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2131 | // Set the forwarding address. |
| 2132 | source->set_map_word(MapWord::FromForwardingAddress(target)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2133 | |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 2134 | if (logging_and_profiling_mode == LOGGING_AND_PROFILING_ENABLED) { |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 2135 | // Update NewSpace stats if necessary. |
| 2136 | RecordCopiedObject(heap, target); |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 2137 | Isolate* isolate = heap->isolate(); |
mstarzinger@chromium.org | 2ed0d02 | 2013-10-17 08:06:21 +0000 | [diff] [blame] | 2138 | HeapProfiler* heap_profiler = isolate->heap_profiler(); |
| 2139 | if (heap_profiler->is_profiling()) { |
| 2140 | heap_profiler->ObjectMoveEvent(source->address(), target->address(), |
| 2141 | size); |
| 2142 | } |
yangguo@chromium.org | 355cfd1 | 2012-08-29 15:32:24 +0000 | [diff] [blame] | 2143 | if (isolate->logger()->is_logging_code_events() || |
mstarzinger@chromium.org | f705b50 | 2013-04-04 11:38:09 +0000 | [diff] [blame] | 2144 | isolate->cpu_profiler()->is_profiling()) { |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 2145 | if (target->IsSharedFunctionInfo()) { |
| 2146 | PROFILE(isolate, SharedFunctionInfoMoveEvent( |
| 2147 | source->address(), target->address())); |
| 2148 | } |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 2149 | } |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 2150 | } |
| 2151 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2152 | if (marks_handling == TRANSFER_MARKS) { |
| 2153 | if (Marking::TransferColor(source, target)) { |
ulan@chromium.org | 2efb900 | 2012-01-19 15:36:35 +0000 | [diff] [blame] | 2154 | MemoryChunk::IncrementLiveBytesFromGC(target->address(), size); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2155 | } |
| 2156 | } |
ager@chromium.org | 6a2b0aa | 2010-07-13 20:58:03 +0000 | [diff] [blame] | 2157 | } |
ager@chromium.org | 6a2b0aa | 2010-07-13 20:58:03 +0000 | [diff] [blame] | 2158 | |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 2159 | |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 2160 | template<ObjectContents object_contents, int alignment> |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2161 | static inline void EvacuateObject(Map* map, |
| 2162 | HeapObject** slot, |
| 2163 | HeapObject* object, |
| 2164 | int object_size) { |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 2165 | SLOW_ASSERT(object_size <= Page::kMaxNonCodeHeapObjectSize); |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 2166 | SLOW_ASSERT(object->Size() == object_size); |
ager@chromium.org | 6a2b0aa | 2010-07-13 20:58:03 +0000 | [diff] [blame] | 2167 | |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 2168 | int allocation_size = object_size; |
| 2169 | if (alignment != kObjectAlignment) { |
| 2170 | ASSERT(alignment == kDoubleAlignment); |
| 2171 | allocation_size += kPointerSize; |
| 2172 | } |
| 2173 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2174 | Heap* heap = map->GetHeap(); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2175 | if (heap->ShouldBePromoted(object->address(), object_size)) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2176 | MaybeObject* maybe_result; |
ager@chromium.org | 6a2b0aa | 2010-07-13 20:58:03 +0000 | [diff] [blame] | 2177 | |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 2178 | if (object_contents == DATA_OBJECT) { |
jkummerow@chromium.org | fb7a7c4 | 2013-10-02 11:41:02 +0000 | [diff] [blame] | 2179 | ASSERT(heap->AllowedToBeMigrated(object, OLD_DATA_SPACE)); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 2180 | maybe_result = heap->old_data_space()->AllocateRaw(allocation_size); |
ager@chromium.org | 6a2b0aa | 2010-07-13 20:58:03 +0000 | [diff] [blame] | 2181 | } else { |
jkummerow@chromium.org | fb7a7c4 | 2013-10-02 11:41:02 +0000 | [diff] [blame] | 2182 | ASSERT(heap->AllowedToBeMigrated(object, OLD_POINTER_SPACE)); |
verwaest@chromium.org | ec6855e | 2013-08-22 12:26:58 +0000 | [diff] [blame] | 2183 | maybe_result = heap->old_pointer_space()->AllocateRaw(allocation_size); |
ager@chromium.org | 6a2b0aa | 2010-07-13 20:58:03 +0000 | [diff] [blame] | 2184 | } |
| 2185 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2186 | Object* result = NULL; // Initialization to please compiler. |
| 2187 | if (maybe_result->ToObject(&result)) { |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2188 | HeapObject* target = HeapObject::cast(result); |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 2189 | |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 2190 | if (alignment != kObjectAlignment) { |
| 2191 | target = EnsureDoubleAligned(heap, target, allocation_size); |
| 2192 | } |
| 2193 | |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 2194 | // Order is important: slot might be inside of the target if target |
| 2195 | // was allocated over a dead object and slot comes from the store |
| 2196 | // buffer. |
| 2197 | *slot = target; |
| 2198 | MigrateObject(heap, object, target, object_size); |
ager@chromium.org | 6a2b0aa | 2010-07-13 20:58:03 +0000 | [diff] [blame] | 2199 | |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2200 | if (object_contents == POINTER_OBJECT) { |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 2201 | if (map->instance_type() == JS_FUNCTION_TYPE) { |
| 2202 | heap->promotion_queue()->insert( |
| 2203 | target, JSFunction::kNonWeakFieldsEndOffset); |
| 2204 | } else { |
| 2205 | heap->promotion_queue()->insert(target, object_size); |
| 2206 | } |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2207 | } |
ager@chromium.org | 6a2b0aa | 2010-07-13 20:58:03 +0000 | [diff] [blame] | 2208 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2209 | heap->tracer()->increment_promoted_objects_size(object_size); |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2210 | return; |
| 2211 | } |
ager@chromium.org | 6a2b0aa | 2010-07-13 20:58:03 +0000 | [diff] [blame] | 2212 | } |
jkummerow@chromium.org | fb7a7c4 | 2013-10-02 11:41:02 +0000 | [diff] [blame] | 2213 | ASSERT(heap->AllowedToBeMigrated(object, NEW_SPACE)); |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 2214 | MaybeObject* allocation = heap->new_space()->AllocateRaw(allocation_size); |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 2215 | heap->promotion_queue()->SetNewLimit(heap->new_space()->top()); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2216 | Object* result = allocation->ToObjectUnchecked(); |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 2217 | HeapObject* target = HeapObject::cast(result); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2218 | |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 2219 | if (alignment != kObjectAlignment) { |
| 2220 | target = EnsureDoubleAligned(heap, target, allocation_size); |
| 2221 | } |
| 2222 | |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 2223 | // Order is important: slot might be inside of the target if target |
| 2224 | // was allocated over a dead object and slot comes from the store |
| 2225 | // buffer. |
| 2226 | *slot = target; |
| 2227 | MigrateObject(heap, object, target, object_size); |
ager@chromium.org | 6a2b0aa | 2010-07-13 20:58:03 +0000 | [diff] [blame] | 2228 | return; |
| 2229 | } |
| 2230 | |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2231 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2232 | static inline void EvacuateJSFunction(Map* map, |
| 2233 | HeapObject** slot, |
| 2234 | HeapObject* object) { |
| 2235 | ObjectEvacuationStrategy<POINTER_OBJECT>:: |
| 2236 | template VisitSpecialized<JSFunction::kSize>(map, slot, object); |
| 2237 | |
| 2238 | HeapObject* target = *slot; |
| 2239 | MarkBit mark_bit = Marking::MarkBitFrom(target); |
| 2240 | if (Marking::IsBlack(mark_bit)) { |
| 2241 | // This object is black and it might not be rescanned by marker. |
| 2242 | // We should explicitly record code entry slot for compaction because |
| 2243 | // promotion queue processing (IterateAndMarkPointersToFromSpace) will |
| 2244 | // miss it as it is not HeapObject-tagged. |
| 2245 | Address code_entry_slot = |
| 2246 | target->address() + JSFunction::kCodeEntryOffset; |
| 2247 | Code* code = Code::cast(Code::GetObjectFromEntryAddress(code_entry_slot)); |
| 2248 | map->GetHeap()->mark_compact_collector()-> |
| 2249 | RecordCodeEntrySlot(code_entry_slot, code); |
| 2250 | } |
| 2251 | } |
| 2252 | |
| 2253 | |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2254 | static inline void EvacuateFixedArray(Map* map, |
| 2255 | HeapObject** slot, |
| 2256 | HeapObject* object) { |
| 2257 | int object_size = FixedArray::BodyDescriptor::SizeOf(map, object); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 2258 | EvacuateObject<POINTER_OBJECT, kObjectAlignment>( |
| 2259 | map, slot, object, object_size); |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2260 | } |
ager@chromium.org | 6a2b0aa | 2010-07-13 20:58:03 +0000 | [diff] [blame] | 2261 | |
| 2262 | |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 2263 | static inline void EvacuateFixedDoubleArray(Map* map, |
| 2264 | HeapObject** slot, |
| 2265 | HeapObject* object) { |
| 2266 | int length = reinterpret_cast<FixedDoubleArray*>(object)->length(); |
| 2267 | int object_size = FixedDoubleArray::SizeFor(length); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 2268 | EvacuateObject<DATA_OBJECT, kDoubleAlignment>( |
| 2269 | map, slot, object, object_size); |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 2270 | } |
| 2271 | |
| 2272 | |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2273 | static inline void EvacuateByteArray(Map* map, |
| 2274 | HeapObject** slot, |
| 2275 | HeapObject* object) { |
| 2276 | int object_size = reinterpret_cast<ByteArray*>(object)->ByteArraySize(); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 2277 | EvacuateObject<DATA_OBJECT, kObjectAlignment>( |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 2278 | map, slot, object, object_size); |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2279 | } |
ager@chromium.org | 6a2b0aa | 2010-07-13 20:58:03 +0000 | [diff] [blame] | 2280 | |
ager@chromium.org | 6a2b0aa | 2010-07-13 20:58:03 +0000 | [diff] [blame] | 2281 | |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 2282 | static inline void EvacuateSeqOneByteString(Map* map, |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2283 | HeapObject** slot, |
| 2284 | HeapObject* object) { |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 2285 | int object_size = SeqOneByteString::cast(object)-> |
| 2286 | SeqOneByteStringSize(map->instance_type()); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 2287 | EvacuateObject<DATA_OBJECT, kObjectAlignment>( |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 2288 | map, slot, object, object_size); |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2289 | } |
| 2290 | |
| 2291 | |
| 2292 | static inline void EvacuateSeqTwoByteString(Map* map, |
| 2293 | HeapObject** slot, |
| 2294 | HeapObject* object) { |
| 2295 | int object_size = SeqTwoByteString::cast(object)-> |
| 2296 | SeqTwoByteStringSize(map->instance_type()); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 2297 | EvacuateObject<DATA_OBJECT, kObjectAlignment>( |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 2298 | map, slot, object, object_size); |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2299 | } |
| 2300 | |
| 2301 | |
| 2302 | static inline bool IsShortcutCandidate(int type) { |
| 2303 | return ((type & kShortcutTypeMask) == kShortcutTypeTag); |
| 2304 | } |
| 2305 | |
| 2306 | static inline void EvacuateShortcutCandidate(Map* map, |
| 2307 | HeapObject** slot, |
| 2308 | HeapObject* object) { |
| 2309 | ASSERT(IsShortcutCandidate(map->instance_type())); |
| 2310 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2311 | Heap* heap = map->GetHeap(); |
| 2312 | |
| 2313 | if (marks_handling == IGNORE_MARKS && |
| 2314 | ConsString::cast(object)->unchecked_second() == |
| 2315 | heap->empty_string()) { |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2316 | HeapObject* first = |
| 2317 | HeapObject::cast(ConsString::cast(object)->unchecked_first()); |
| 2318 | |
| 2319 | *slot = first; |
| 2320 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2321 | if (!heap->InNewSpace(first)) { |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2322 | object->set_map_word(MapWord::FromForwardingAddress(first)); |
| 2323 | return; |
| 2324 | } |
| 2325 | |
| 2326 | MapWord first_word = first->map_word(); |
| 2327 | if (first_word.IsForwardingAddress()) { |
| 2328 | HeapObject* target = first_word.ToForwardingAddress(); |
| 2329 | |
| 2330 | *slot = target; |
| 2331 | object->set_map_word(MapWord::FromForwardingAddress(target)); |
| 2332 | return; |
| 2333 | } |
| 2334 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2335 | heap->DoScavengeObject(first->map(), slot, first); |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2336 | object->set_map_word(MapWord::FromForwardingAddress(*slot)); |
| 2337 | return; |
ager@chromium.org | 6a2b0aa | 2010-07-13 20:58:03 +0000 | [diff] [blame] | 2338 | } |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2339 | |
| 2340 | int object_size = ConsString::kSize; |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 2341 | EvacuateObject<POINTER_OBJECT, kObjectAlignment>( |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 2342 | map, slot, object, object_size); |
ager@chromium.org | 6a2b0aa | 2010-07-13 20:58:03 +0000 | [diff] [blame] | 2343 | } |
| 2344 | |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2345 | template<ObjectContents object_contents> |
| 2346 | class ObjectEvacuationStrategy { |
| 2347 | public: |
| 2348 | template<int object_size> |
| 2349 | static inline void VisitSpecialized(Map* map, |
| 2350 | HeapObject** slot, |
| 2351 | HeapObject* object) { |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 2352 | EvacuateObject<object_contents, kObjectAlignment>( |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 2353 | map, slot, object, object_size); |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2354 | } |
ager@chromium.org | 6a2b0aa | 2010-07-13 20:58:03 +0000 | [diff] [blame] | 2355 | |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2356 | static inline void Visit(Map* map, |
| 2357 | HeapObject** slot, |
| 2358 | HeapObject* object) { |
| 2359 | int object_size = map->instance_size(); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 2360 | EvacuateObject<object_contents, kObjectAlignment>( |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 2361 | map, slot, object, object_size); |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2362 | } |
| 2363 | }; |
ager@chromium.org | 6a2b0aa | 2010-07-13 20:58:03 +0000 | [diff] [blame] | 2364 | |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 2365 | static VisitorDispatchTable<ScavengingCallback> table_; |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2366 | }; |
ager@chromium.org | 6a2b0aa | 2010-07-13 20:58:03 +0000 | [diff] [blame] | 2367 | |
ager@chromium.org | 6a2b0aa | 2010-07-13 20:58:03 +0000 | [diff] [blame] | 2368 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2369 | template<MarksHandling marks_handling, |
| 2370 | LoggingAndProfiling logging_and_profiling_mode> |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 2371 | VisitorDispatchTable<ScavengingCallback> |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2372 | ScavengingVisitor<marks_handling, logging_and_profiling_mode>::table_; |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 2373 | |
| 2374 | |
| 2375 | static void InitializeScavengingVisitorsTables() { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2376 | ScavengingVisitor<TRANSFER_MARKS, |
| 2377 | LOGGING_AND_PROFILING_DISABLED>::Initialize(); |
| 2378 | ScavengingVisitor<IGNORE_MARKS, LOGGING_AND_PROFILING_DISABLED>::Initialize(); |
| 2379 | ScavengingVisitor<TRANSFER_MARKS, |
| 2380 | LOGGING_AND_PROFILING_ENABLED>::Initialize(); |
| 2381 | ScavengingVisitor<IGNORE_MARKS, LOGGING_AND_PROFILING_ENABLED>::Initialize(); |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 2382 | } |
| 2383 | |
| 2384 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2385 | void Heap::SelectScavengingVisitorsTable() { |
| 2386 | bool logging_and_profiling = |
| 2387 | isolate()->logger()->is_logging() || |
mstarzinger@chromium.org | f705b50 | 2013-04-04 11:38:09 +0000 | [diff] [blame] | 2388 | isolate()->cpu_profiler()->is_profiling() || |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 2389 | (isolate()->heap_profiler() != NULL && |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2390 | isolate()->heap_profiler()->is_profiling()); |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 2391 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2392 | if (!incremental_marking()->IsMarking()) { |
| 2393 | if (!logging_and_profiling) { |
| 2394 | scavenging_visitors_table_.CopyFrom( |
| 2395 | ScavengingVisitor<IGNORE_MARKS, |
| 2396 | LOGGING_AND_PROFILING_DISABLED>::GetTable()); |
| 2397 | } else { |
| 2398 | scavenging_visitors_table_.CopyFrom( |
| 2399 | ScavengingVisitor<IGNORE_MARKS, |
| 2400 | LOGGING_AND_PROFILING_ENABLED>::GetTable()); |
| 2401 | } |
| 2402 | } else { |
| 2403 | if (!logging_and_profiling) { |
| 2404 | scavenging_visitors_table_.CopyFrom( |
| 2405 | ScavengingVisitor<TRANSFER_MARKS, |
| 2406 | LOGGING_AND_PROFILING_DISABLED>::GetTable()); |
| 2407 | } else { |
| 2408 | scavenging_visitors_table_.CopyFrom( |
| 2409 | ScavengingVisitor<TRANSFER_MARKS, |
| 2410 | LOGGING_AND_PROFILING_ENABLED>::GetTable()); |
| 2411 | } |
svenpanne@chromium.org | a8bb4d9 | 2011-10-10 13:20:40 +0000 | [diff] [blame] | 2412 | |
| 2413 | if (incremental_marking()->IsCompacting()) { |
| 2414 | // When compacting forbid short-circuiting of cons-strings. |
| 2415 | // Scavenging code relies on the fact that new space object |
| 2416 | // can't be evacuated into evacuation candidate but |
| 2417 | // short-circuiting violates this assumption. |
| 2418 | scavenging_visitors_table_.Register( |
| 2419 | StaticVisitorBase::kVisitShortcutCandidate, |
| 2420 | scavenging_visitors_table_.GetVisitorById( |
| 2421 | StaticVisitorBase::kVisitConsString)); |
| 2422 | } |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 2423 | } |
| 2424 | } |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 2425 | |
| 2426 | |
| 2427 | void Heap::ScavengeObjectSlow(HeapObject** p, HeapObject* object) { |
hpayer@chromium.org | c5d4971 | 2013-09-11 08:25:48 +0000 | [diff] [blame] | 2428 | SLOW_ASSERT(object->GetIsolate()->heap()->InFromSpace(object)); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 2429 | MapWord first_word = object->map_word(); |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 2430 | SLOW_ASSERT(!first_word.IsForwardingAddress()); |
ager@chromium.org | 6a2b0aa | 2010-07-13 20:58:03 +0000 | [diff] [blame] | 2431 | Map* map = first_word.ToMap(); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2432 | map->GetHeap()->DoScavengeObject(map, p, object); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 2433 | } |
| 2434 | |
| 2435 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2436 | MaybeObject* Heap::AllocatePartialMap(InstanceType instance_type, |
| 2437 | int instance_size) { |
| 2438 | Object* result; |
bmeurer@chromium.org | e94b5ff | 2013-10-25 09:22:31 +0000 | [diff] [blame^] | 2439 | MaybeObject* maybe_result = AllocateRaw(Map::kSize, MAP_SPACE, MAP_SPACE); |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 2440 | if (!maybe_result->ToObject(&result)) return maybe_result; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2441 | |
| 2442 | // Map::cast cannot be used due to uninitialized map field. |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2443 | reinterpret_cast<Map*>(result)->set_map(raw_unchecked_meta_map()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2444 | reinterpret_cast<Map*>(result)->set_instance_type(instance_type); |
| 2445 | reinterpret_cast<Map*>(result)->set_instance_size(instance_size); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2446 | reinterpret_cast<Map*>(result)->set_visitor_id( |
| 2447 | StaticVisitorBase::GetVisitorId(instance_type, instance_size)); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2448 | reinterpret_cast<Map*>(result)->set_inobject_properties(0); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2449 | reinterpret_cast<Map*>(result)->set_pre_allocated_property_fields(0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2450 | reinterpret_cast<Map*>(result)->set_unused_property_fields(0); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2451 | reinterpret_cast<Map*>(result)->set_bit_field(0); |
| 2452 | reinterpret_cast<Map*>(result)->set_bit_field2(0); |
verwaest@chromium.org | 06ab2ec | 2012-10-09 17:00:13 +0000 | [diff] [blame] | 2453 | int bit_field3 = Map::EnumLengthBits::encode(Map::kInvalidEnumCache) | |
| 2454 | Map::OwnsDescriptors::encode(true); |
| 2455 | reinterpret_cast<Map*>(result)->set_bit_field3(bit_field3); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2456 | return result; |
| 2457 | } |
| 2458 | |
| 2459 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2460 | MaybeObject* Heap::AllocateMap(InstanceType instance_type, |
| 2461 | int instance_size, |
| 2462 | ElementsKind elements_kind) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2463 | Object* result; |
bmeurer@chromium.org | e94b5ff | 2013-10-25 09:22:31 +0000 | [diff] [blame^] | 2464 | MaybeObject* maybe_result = AllocateRaw(Map::kSize, MAP_SPACE, MAP_SPACE); |
yangguo@chromium.org | 304cc33 | 2012-07-24 07:59:48 +0000 | [diff] [blame] | 2465 | if (!maybe_result->To(&result)) return maybe_result; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2466 | |
| 2467 | Map* map = reinterpret_cast<Map*>(result); |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 2468 | map->set_map_no_write_barrier(meta_map()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2469 | map->set_instance_type(instance_type); |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2470 | map->set_visitor_id( |
| 2471 | StaticVisitorBase::GetVisitorId(instance_type, instance_size)); |
ricow@chromium.org | 27bf288 | 2011-11-17 08:34:43 +0000 | [diff] [blame] | 2472 | map->set_prototype(null_value(), SKIP_WRITE_BARRIER); |
| 2473 | map->set_constructor(null_value(), SKIP_WRITE_BARRIER); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2474 | map->set_instance_size(instance_size); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2475 | map->set_inobject_properties(0); |
sgjesse@chromium.org | 911335c | 2009-08-19 12:59:44 +0000 | [diff] [blame] | 2476 | map->set_pre_allocated_property_fields(0); |
ricow@chromium.org | 27bf288 | 2011-11-17 08:34:43 +0000 | [diff] [blame] | 2477 | map->set_code_cache(empty_fixed_array(), SKIP_WRITE_BARRIER); |
ulan@chromium.org | 2e04b58 | 2013-02-21 14:06:02 +0000 | [diff] [blame] | 2478 | map->set_dependent_code(DependentCode::cast(empty_fixed_array()), |
| 2479 | SKIP_WRITE_BARRIER); |
danno@chromium.org | 81cac2b | 2012-07-10 11:28:27 +0000 | [diff] [blame] | 2480 | map->init_back_pointer(undefined_value()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2481 | map->set_unused_property_fields(0); |
rossberg@chromium.org | 89e18f5 | 2012-10-22 13:09:53 +0000 | [diff] [blame] | 2482 | map->set_instance_descriptors(empty_descriptor_array()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2483 | map->set_bit_field(0); |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 2484 | map->set_bit_field2(1 << Map::kIsExtensible); |
verwaest@chromium.org | 06ab2ec | 2012-10-09 17:00:13 +0000 | [diff] [blame] | 2485 | int bit_field3 = Map::EnumLengthBits::encode(Map::kInvalidEnumCache) | |
| 2486 | Map::OwnsDescriptors::encode(true); |
yangguo@chromium.org | 355cfd1 | 2012-08-29 15:32:24 +0000 | [diff] [blame] | 2487 | map->set_bit_field3(bit_field3); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2488 | map->set_elements_kind(elements_kind); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 2489 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2490 | return map; |
| 2491 | } |
| 2492 | |
| 2493 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2494 | MaybeObject* Heap::AllocateCodeCache() { |
ulan@chromium.org | 9a21ec4 | 2012-03-06 08:42:24 +0000 | [diff] [blame] | 2495 | CodeCache* code_cache; |
| 2496 | { MaybeObject* maybe_code_cache = AllocateStruct(CODE_CACHE_TYPE); |
| 2497 | if (!maybe_code_cache->To(&code_cache)) return maybe_code_cache; |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2498 | } |
ricow@chromium.org | 27bf288 | 2011-11-17 08:34:43 +0000 | [diff] [blame] | 2499 | code_cache->set_default_cache(empty_fixed_array(), SKIP_WRITE_BARRIER); |
| 2500 | code_cache->set_normal_type_cache(undefined_value(), SKIP_WRITE_BARRIER); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 2501 | return code_cache; |
| 2502 | } |
| 2503 | |
| 2504 | |
jkummerow@chromium.org | e297f59 | 2011-06-08 10:05:15 +0000 | [diff] [blame] | 2505 | MaybeObject* Heap::AllocatePolymorphicCodeCache() { |
| 2506 | return AllocateStruct(POLYMORPHIC_CODE_CACHE_TYPE); |
| 2507 | } |
| 2508 | |
| 2509 | |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 2510 | MaybeObject* Heap::AllocateAccessorPair() { |
ulan@chromium.org | 9a21ec4 | 2012-03-06 08:42:24 +0000 | [diff] [blame] | 2511 | AccessorPair* accessors; |
| 2512 | { MaybeObject* maybe_accessors = AllocateStruct(ACCESSOR_PAIR_TYPE); |
| 2513 | if (!maybe_accessors->To(&accessors)) return maybe_accessors; |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 2514 | } |
ulan@chromium.org | 9a21ec4 | 2012-03-06 08:42:24 +0000 | [diff] [blame] | 2515 | accessors->set_getter(the_hole_value(), SKIP_WRITE_BARRIER); |
| 2516 | accessors->set_setter(the_hole_value(), SKIP_WRITE_BARRIER); |
jkummerow@chromium.org | 1e8da74 | 2013-08-26 17:13:35 +0000 | [diff] [blame] | 2517 | accessors->set_access_flags(Smi::FromInt(0), SKIP_WRITE_BARRIER); |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 2518 | return accessors; |
| 2519 | } |
| 2520 | |
| 2521 | |
jkummerow@chromium.org | f7a5884 | 2012-02-21 10:08:21 +0000 | [diff] [blame] | 2522 | MaybeObject* Heap::AllocateTypeFeedbackInfo() { |
| 2523 | TypeFeedbackInfo* info; |
ulan@chromium.org | 9a21ec4 | 2012-03-06 08:42:24 +0000 | [diff] [blame] | 2524 | { MaybeObject* maybe_info = AllocateStruct(TYPE_FEEDBACK_INFO_TYPE); |
| 2525 | if (!maybe_info->To(&info)) return maybe_info; |
jkummerow@chromium.org | f7a5884 | 2012-02-21 10:08:21 +0000 | [diff] [blame] | 2526 | } |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 2527 | info->initialize_storage(); |
jkummerow@chromium.org | f7a5884 | 2012-02-21 10:08:21 +0000 | [diff] [blame] | 2528 | info->set_type_feedback_cells(TypeFeedbackCells::cast(empty_fixed_array()), |
| 2529 | SKIP_WRITE_BARRIER); |
| 2530 | return info; |
| 2531 | } |
| 2532 | |
| 2533 | |
yangguo@chromium.org | ab30bb8 | 2012-02-24 14:41:46 +0000 | [diff] [blame] | 2534 | MaybeObject* Heap::AllocateAliasedArgumentsEntry(int aliased_context_slot) { |
| 2535 | AliasedArgumentsEntry* entry; |
ulan@chromium.org | 9a21ec4 | 2012-03-06 08:42:24 +0000 | [diff] [blame] | 2536 | { MaybeObject* maybe_entry = AllocateStruct(ALIASED_ARGUMENTS_ENTRY_TYPE); |
| 2537 | if (!maybe_entry->To(&entry)) return maybe_entry; |
yangguo@chromium.org | ab30bb8 | 2012-02-24 14:41:46 +0000 | [diff] [blame] | 2538 | } |
| 2539 | entry->set_aliased_context_slot(aliased_context_slot); |
| 2540 | return entry; |
| 2541 | } |
| 2542 | |
| 2543 | |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2544 | const Heap::StringTypeTable Heap::string_type_table[] = { |
| 2545 | #define STRING_TYPE_ELEMENT(type, size, name, camel_name) \ |
| 2546 | {type, size, k##camel_name##MapRootIndex}, |
| 2547 | STRING_TYPE_LIST(STRING_TYPE_ELEMENT) |
| 2548 | #undef STRING_TYPE_ELEMENT |
| 2549 | }; |
| 2550 | |
| 2551 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 2552 | const Heap::ConstantStringTable Heap::constant_string_table[] = { |
| 2553 | #define CONSTANT_STRING_ELEMENT(name, contents) \ |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2554 | {contents, k##name##RootIndex}, |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 2555 | INTERNALIZED_STRING_LIST(CONSTANT_STRING_ELEMENT) |
| 2556 | #undef CONSTANT_STRING_ELEMENT |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2557 | }; |
| 2558 | |
| 2559 | |
| 2560 | const Heap::StructTable Heap::struct_table[] = { |
| 2561 | #define STRUCT_TABLE_ELEMENT(NAME, Name, name) \ |
| 2562 | { NAME##_TYPE, Name::kSize, k##Name##MapRootIndex }, |
| 2563 | STRUCT_LIST(STRUCT_TABLE_ELEMENT) |
| 2564 | #undef STRUCT_TABLE_ELEMENT |
| 2565 | }; |
| 2566 | |
| 2567 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2568 | bool Heap::CreateInitialMaps() { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2569 | Object* obj; |
| 2570 | { MaybeObject* maybe_obj = AllocatePartialMap(MAP_TYPE, Map::kSize); |
| 2571 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2572 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2573 | // Map::cast cannot be used due to uninitialized map field. |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2574 | Map* new_meta_map = reinterpret_cast<Map*>(obj); |
| 2575 | set_meta_map(new_meta_map); |
| 2576 | new_meta_map->set_map(new_meta_map); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2577 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2578 | { MaybeObject* maybe_obj = |
| 2579 | AllocatePartialMap(FIXED_ARRAY_TYPE, kVariableSizeSentinel); |
| 2580 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2581 | } |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2582 | set_fixed_array_map(Map::cast(obj)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2583 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2584 | { MaybeObject* maybe_obj = AllocatePartialMap(ODDBALL_TYPE, Oddball::kSize); |
| 2585 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2586 | } |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2587 | set_oddball_map(Map::cast(obj)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2588 | |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 2589 | // Allocate the empty array. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2590 | { MaybeObject* maybe_obj = AllocateEmptyFixedArray(); |
| 2591 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2592 | } |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2593 | set_empty_fixed_array(FixedArray::cast(obj)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2594 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2595 | { MaybeObject* maybe_obj = Allocate(oddball_map(), OLD_POINTER_SPACE); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2596 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2597 | } |
svenpanne@chromium.org | a8bb4d9 | 2011-10-10 13:20:40 +0000 | [diff] [blame] | 2598 | set_null_value(Oddball::cast(obj)); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2599 | Oddball::cast(obj)->set_kind(Oddball::kNull); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2600 | |
svenpanne@chromium.org | a8bb4d9 | 2011-10-10 13:20:40 +0000 | [diff] [blame] | 2601 | { MaybeObject* maybe_obj = Allocate(oddball_map(), OLD_POINTER_SPACE); |
| 2602 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2603 | } |
| 2604 | set_undefined_value(Oddball::cast(obj)); |
| 2605 | Oddball::cast(obj)->set_kind(Oddball::kUndefined); |
| 2606 | ASSERT(!InNewSpace(undefined_value())); |
| 2607 | |
kasperl@chromium.org | defbd10 | 2009-07-13 14:04:26 +0000 | [diff] [blame] | 2608 | // Allocate the empty descriptor array. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2609 | { MaybeObject* maybe_obj = AllocateEmptyFixedArray(); |
| 2610 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2611 | } |
kasperl@chromium.org | defbd10 | 2009-07-13 14:04:26 +0000 | [diff] [blame] | 2612 | set_empty_descriptor_array(DescriptorArray::cast(obj)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2613 | |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 2614 | // Fix the instance_descriptors for the existing maps. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2615 | meta_map()->set_code_cache(empty_fixed_array()); |
ulan@chromium.org | 2e04b58 | 2013-02-21 14:06:02 +0000 | [diff] [blame] | 2616 | meta_map()->set_dependent_code(DependentCode::cast(empty_fixed_array())); |
danno@chromium.org | 81cac2b | 2012-07-10 11:28:27 +0000 | [diff] [blame] | 2617 | meta_map()->init_back_pointer(undefined_value()); |
rossberg@chromium.org | 89e18f5 | 2012-10-22 13:09:53 +0000 | [diff] [blame] | 2618 | meta_map()->set_instance_descriptors(empty_descriptor_array()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2619 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2620 | fixed_array_map()->set_code_cache(empty_fixed_array()); |
ulan@chromium.org | 2e04b58 | 2013-02-21 14:06:02 +0000 | [diff] [blame] | 2621 | fixed_array_map()->set_dependent_code( |
| 2622 | DependentCode::cast(empty_fixed_array())); |
danno@chromium.org | 81cac2b | 2012-07-10 11:28:27 +0000 | [diff] [blame] | 2623 | fixed_array_map()->init_back_pointer(undefined_value()); |
rossberg@chromium.org | 89e18f5 | 2012-10-22 13:09:53 +0000 | [diff] [blame] | 2624 | fixed_array_map()->set_instance_descriptors(empty_descriptor_array()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2625 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2626 | oddball_map()->set_code_cache(empty_fixed_array()); |
ulan@chromium.org | 2e04b58 | 2013-02-21 14:06:02 +0000 | [diff] [blame] | 2627 | oddball_map()->set_dependent_code(DependentCode::cast(empty_fixed_array())); |
danno@chromium.org | 81cac2b | 2012-07-10 11:28:27 +0000 | [diff] [blame] | 2628 | oddball_map()->init_back_pointer(undefined_value()); |
rossberg@chromium.org | 89e18f5 | 2012-10-22 13:09:53 +0000 | [diff] [blame] | 2629 | oddball_map()->set_instance_descriptors(empty_descriptor_array()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2630 | |
| 2631 | // Fix prototype object for existing maps. |
| 2632 | meta_map()->set_prototype(null_value()); |
| 2633 | meta_map()->set_constructor(null_value()); |
| 2634 | |
| 2635 | fixed_array_map()->set_prototype(null_value()); |
| 2636 | fixed_array_map()->set_constructor(null_value()); |
kasperl@chromium.org | defbd10 | 2009-07-13 14:04:26 +0000 | [diff] [blame] | 2637 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2638 | oddball_map()->set_prototype(null_value()); |
| 2639 | oddball_map()->set_constructor(null_value()); |
| 2640 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2641 | { MaybeObject* maybe_obj = |
| 2642 | AllocateMap(FIXED_ARRAY_TYPE, kVariableSizeSentinel); |
| 2643 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2644 | } |
ricow@chromium.org | 0b9f850 | 2010-08-18 07:45:01 +0000 | [diff] [blame] | 2645 | set_fixed_cow_array_map(Map::cast(obj)); |
| 2646 | ASSERT(fixed_array_map() != fixed_cow_array_map()); |
| 2647 | |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 2648 | { MaybeObject* maybe_obj = |
| 2649 | AllocateMap(FIXED_ARRAY_TYPE, kVariableSizeSentinel); |
| 2650 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2651 | } |
jkummerow@chromium.org | c3b3712 | 2011-11-07 10:14:12 +0000 | [diff] [blame] | 2652 | set_scope_info_map(Map::cast(obj)); |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 2653 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2654 | { MaybeObject* maybe_obj = AllocateMap(HEAP_NUMBER_TYPE, HeapNumber::kSize); |
| 2655 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2656 | } |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2657 | set_heap_number_map(Map::cast(obj)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2658 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 2659 | { MaybeObject* maybe_obj = AllocateMap(SYMBOL_TYPE, Symbol::kSize); |
| 2660 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2661 | } |
| 2662 | set_symbol_map(Map::cast(obj)); |
| 2663 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 2664 | { MaybeObject* maybe_obj = AllocateMap(FOREIGN_TYPE, Foreign::kSize); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2665 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2666 | } |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 2667 | set_foreign_map(Map::cast(obj)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2668 | |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2669 | for (unsigned i = 0; i < ARRAY_SIZE(string_type_table); i++) { |
| 2670 | const StringTypeTable& entry = string_type_table[i]; |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2671 | { MaybeObject* maybe_obj = AllocateMap(entry.type, entry.size); |
| 2672 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2673 | } |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2674 | roots_[entry.index] = Map::cast(obj); |
| 2675 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2676 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2677 | { MaybeObject* maybe_obj = AllocateMap(STRING_TYPE, kVariableSizeSentinel); |
| 2678 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2679 | } |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 2680 | set_undetectable_string_map(Map::cast(obj)); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2681 | Map::cast(obj)->set_is_undetectable(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2682 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2683 | { MaybeObject* maybe_obj = |
| 2684 | AllocateMap(ASCII_STRING_TYPE, kVariableSizeSentinel); |
| 2685 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2686 | } |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 2687 | set_undetectable_ascii_string_map(Map::cast(obj)); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2688 | Map::cast(obj)->set_is_undetectable(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2689 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2690 | { MaybeObject* maybe_obj = |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 2691 | AllocateMap(FIXED_DOUBLE_ARRAY_TYPE, kVariableSizeSentinel); |
| 2692 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2693 | } |
| 2694 | set_fixed_double_array_map(Map::cast(obj)); |
| 2695 | |
| 2696 | { MaybeObject* maybe_obj = |
mstarzinger@chromium.org | a2e1a40 | 2013-10-15 08:25:05 +0000 | [diff] [blame] | 2697 | AllocateMap(CONSTANT_POOL_ARRAY_TYPE, kVariableSizeSentinel); |
| 2698 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2699 | } |
| 2700 | set_constant_pool_array_map(Map::cast(obj)); |
| 2701 | |
| 2702 | { MaybeObject* maybe_obj = |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2703 | AllocateMap(BYTE_ARRAY_TYPE, kVariableSizeSentinel); |
| 2704 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2705 | } |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2706 | set_byte_array_map(Map::cast(obj)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2707 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2708 | { MaybeObject* maybe_obj = |
| 2709 | AllocateMap(FREE_SPACE_TYPE, kVariableSizeSentinel); |
| 2710 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2711 | } |
| 2712 | set_free_space_map(Map::cast(obj)); |
| 2713 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2714 | { MaybeObject* maybe_obj = AllocateByteArray(0, TENURED); |
| 2715 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2716 | } |
| 2717 | set_empty_byte_array(ByteArray::cast(obj)); |
| 2718 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2719 | { MaybeObject* maybe_obj = |
danno@chromium.org | 4d3fe4e | 2011-03-10 10:14:28 +0000 | [diff] [blame] | 2720 | AllocateMap(EXTERNAL_PIXEL_ARRAY_TYPE, ExternalArray::kAlignedSize); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2721 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2722 | } |
danno@chromium.org | 4d3fe4e | 2011-03-10 10:14:28 +0000 | [diff] [blame] | 2723 | set_external_pixel_array_map(Map::cast(obj)); |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 2724 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2725 | { MaybeObject* maybe_obj = AllocateMap(EXTERNAL_BYTE_ARRAY_TYPE, |
| 2726 | ExternalArray::kAlignedSize); |
| 2727 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2728 | } |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 2729 | set_external_byte_array_map(Map::cast(obj)); |
| 2730 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2731 | { MaybeObject* maybe_obj = AllocateMap(EXTERNAL_UNSIGNED_BYTE_ARRAY_TYPE, |
| 2732 | ExternalArray::kAlignedSize); |
| 2733 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2734 | } |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 2735 | set_external_unsigned_byte_array_map(Map::cast(obj)); |
| 2736 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2737 | { MaybeObject* maybe_obj = AllocateMap(EXTERNAL_SHORT_ARRAY_TYPE, |
| 2738 | ExternalArray::kAlignedSize); |
| 2739 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2740 | } |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 2741 | set_external_short_array_map(Map::cast(obj)); |
| 2742 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2743 | { MaybeObject* maybe_obj = AllocateMap(EXTERNAL_UNSIGNED_SHORT_ARRAY_TYPE, |
| 2744 | ExternalArray::kAlignedSize); |
| 2745 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2746 | } |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 2747 | set_external_unsigned_short_array_map(Map::cast(obj)); |
| 2748 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2749 | { MaybeObject* maybe_obj = AllocateMap(EXTERNAL_INT_ARRAY_TYPE, |
| 2750 | ExternalArray::kAlignedSize); |
| 2751 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2752 | } |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 2753 | set_external_int_array_map(Map::cast(obj)); |
| 2754 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2755 | { MaybeObject* maybe_obj = AllocateMap(EXTERNAL_UNSIGNED_INT_ARRAY_TYPE, |
| 2756 | ExternalArray::kAlignedSize); |
| 2757 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2758 | } |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 2759 | set_external_unsigned_int_array_map(Map::cast(obj)); |
| 2760 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2761 | { MaybeObject* maybe_obj = AllocateMap(EXTERNAL_FLOAT_ARRAY_TYPE, |
| 2762 | ExternalArray::kAlignedSize); |
| 2763 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2764 | } |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 2765 | set_external_float_array_map(Map::cast(obj)); |
| 2766 | |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 2767 | { MaybeObject* maybe_obj = |
| 2768 | AllocateMap(FIXED_ARRAY_TYPE, kVariableSizeSentinel); |
| 2769 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2770 | } |
| 2771 | set_non_strict_arguments_elements_map(Map::cast(obj)); |
| 2772 | |
erik.corry@gmail.com | 3847bd5 | 2011-04-27 10:38:56 +0000 | [diff] [blame] | 2773 | { MaybeObject* maybe_obj = AllocateMap(EXTERNAL_DOUBLE_ARRAY_TYPE, |
| 2774 | ExternalArray::kAlignedSize); |
| 2775 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2776 | } |
| 2777 | set_external_double_array_map(Map::cast(obj)); |
| 2778 | |
jkummerow@chromium.org | 4e308cf | 2013-05-17 13:39:16 +0000 | [diff] [blame] | 2779 | { MaybeObject* maybe_obj = AllocateEmptyExternalArray(kExternalByteArray); |
| 2780 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2781 | } |
| 2782 | set_empty_external_byte_array(ExternalArray::cast(obj)); |
| 2783 | |
| 2784 | { MaybeObject* maybe_obj = |
| 2785 | AllocateEmptyExternalArray(kExternalUnsignedByteArray); |
| 2786 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2787 | } |
| 2788 | set_empty_external_unsigned_byte_array(ExternalArray::cast(obj)); |
| 2789 | |
| 2790 | { MaybeObject* maybe_obj = AllocateEmptyExternalArray(kExternalShortArray); |
| 2791 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2792 | } |
| 2793 | set_empty_external_short_array(ExternalArray::cast(obj)); |
| 2794 | |
| 2795 | { MaybeObject* maybe_obj = AllocateEmptyExternalArray( |
| 2796 | kExternalUnsignedShortArray); |
| 2797 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2798 | } |
| 2799 | set_empty_external_unsigned_short_array(ExternalArray::cast(obj)); |
| 2800 | |
| 2801 | { MaybeObject* maybe_obj = AllocateEmptyExternalArray(kExternalIntArray); |
| 2802 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2803 | } |
| 2804 | set_empty_external_int_array(ExternalArray::cast(obj)); |
| 2805 | |
| 2806 | { MaybeObject* maybe_obj = |
| 2807 | AllocateEmptyExternalArray(kExternalUnsignedIntArray); |
| 2808 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2809 | } |
| 2810 | set_empty_external_unsigned_int_array(ExternalArray::cast(obj)); |
| 2811 | |
| 2812 | { MaybeObject* maybe_obj = AllocateEmptyExternalArray(kExternalFloatArray); |
| 2813 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2814 | } |
| 2815 | set_empty_external_float_array(ExternalArray::cast(obj)); |
| 2816 | |
| 2817 | { MaybeObject* maybe_obj = AllocateEmptyExternalArray(kExternalDoubleArray); |
| 2818 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2819 | } |
| 2820 | set_empty_external_double_array(ExternalArray::cast(obj)); |
| 2821 | |
| 2822 | { MaybeObject* maybe_obj = AllocateEmptyExternalArray(kExternalPixelArray); |
| 2823 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2824 | } |
| 2825 | set_empty_external_pixel_array(ExternalArray::cast(obj)); |
| 2826 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2827 | { MaybeObject* maybe_obj = AllocateMap(CODE_TYPE, kVariableSizeSentinel); |
| 2828 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2829 | } |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2830 | set_code_map(Map::cast(obj)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2831 | |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 2832 | { MaybeObject* maybe_obj = AllocateMap(CELL_TYPE, Cell::kSize); |
| 2833 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2834 | } |
| 2835 | set_cell_map(Map::cast(obj)); |
| 2836 | |
| 2837 | { MaybeObject* maybe_obj = AllocateMap(PROPERTY_CELL_TYPE, |
dslomov@chromium.org | b752d40 | 2013-06-18 11:54:54 +0000 | [diff] [blame] | 2838 | PropertyCell::kSize); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2839 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2840 | } |
kasperl@chromium.org | defbd10 | 2009-07-13 14:04:26 +0000 | [diff] [blame] | 2841 | set_global_property_cell_map(Map::cast(obj)); |
| 2842 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2843 | { MaybeObject* maybe_obj = AllocateMap(FILLER_TYPE, kPointerSize); |
| 2844 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2845 | } |
kasperl@chromium.org | defbd10 | 2009-07-13 14:04:26 +0000 | [diff] [blame] | 2846 | set_one_pointer_filler_map(Map::cast(obj)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2847 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2848 | { MaybeObject* maybe_obj = AllocateMap(FILLER_TYPE, 2 * kPointerSize); |
| 2849 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2850 | } |
kasperl@chromium.org | defbd10 | 2009-07-13 14:04:26 +0000 | [diff] [blame] | 2851 | set_two_pointer_filler_map(Map::cast(obj)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2852 | |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2853 | for (unsigned i = 0; i < ARRAY_SIZE(struct_table); i++) { |
| 2854 | const StructTable& entry = struct_table[i]; |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2855 | { MaybeObject* maybe_obj = AllocateMap(entry.type, entry.size); |
| 2856 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2857 | } |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2858 | roots_[entry.index] = Map::cast(obj); |
| 2859 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2860 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2861 | { MaybeObject* maybe_obj = |
| 2862 | AllocateMap(FIXED_ARRAY_TYPE, kVariableSizeSentinel); |
| 2863 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2864 | } |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2865 | set_hash_table_map(Map::cast(obj)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2866 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2867 | { MaybeObject* maybe_obj = |
| 2868 | AllocateMap(FIXED_ARRAY_TYPE, kVariableSizeSentinel); |
| 2869 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2870 | } |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 2871 | set_function_context_map(Map::cast(obj)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2872 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2873 | { MaybeObject* maybe_obj = |
| 2874 | AllocateMap(FIXED_ARRAY_TYPE, kVariableSizeSentinel); |
| 2875 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2876 | } |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2877 | set_catch_context_map(Map::cast(obj)); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 2878 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2879 | { MaybeObject* maybe_obj = |
| 2880 | AllocateMap(FIXED_ARRAY_TYPE, kVariableSizeSentinel); |
| 2881 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2882 | } |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 2883 | set_with_context_map(Map::cast(obj)); |
| 2884 | |
| 2885 | { MaybeObject* maybe_obj = |
| 2886 | AllocateMap(FIXED_ARRAY_TYPE, kVariableSizeSentinel); |
| 2887 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2888 | } |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 2889 | set_block_context_map(Map::cast(obj)); |
| 2890 | |
| 2891 | { MaybeObject* maybe_obj = |
| 2892 | AllocateMap(FIXED_ARRAY_TYPE, kVariableSizeSentinel); |
| 2893 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2894 | } |
jkummerow@chromium.org | f7a5884 | 2012-02-21 10:08:21 +0000 | [diff] [blame] | 2895 | set_module_context_map(Map::cast(obj)); |
| 2896 | |
| 2897 | { MaybeObject* maybe_obj = |
| 2898 | AllocateMap(FIXED_ARRAY_TYPE, kVariableSizeSentinel); |
| 2899 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2900 | } |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 2901 | set_global_context_map(Map::cast(obj)); |
| 2902 | |
| 2903 | { MaybeObject* maybe_obj = |
| 2904 | AllocateMap(FIXED_ARRAY_TYPE, kVariableSizeSentinel); |
| 2905 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2906 | } |
| 2907 | Map* native_context_map = Map::cast(obj); |
| 2908 | native_context_map->set_dictionary_map(true); |
| 2909 | native_context_map->set_visitor_id(StaticVisitorBase::kVisitNativeContext); |
| 2910 | set_native_context_map(native_context_map); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2911 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2912 | { MaybeObject* maybe_obj = AllocateMap(SHARED_FUNCTION_INFO_TYPE, |
| 2913 | SharedFunctionInfo::kAlignedSize); |
| 2914 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2915 | } |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2916 | set_shared_function_info_map(Map::cast(obj)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2917 | |
kmillikin@chromium.org | 31b1277 | 2011-02-02 16:08:26 +0000 | [diff] [blame] | 2918 | { MaybeObject* maybe_obj = AllocateMap(JS_MESSAGE_OBJECT_TYPE, |
| 2919 | JSMessageObject::kSize); |
| 2920 | if (!maybe_obj->ToObject(&obj)) return false; |
| 2921 | } |
| 2922 | set_message_object_map(Map::cast(obj)); |
| 2923 | |
yangguo@chromium.org | eeb44b6 | 2012-11-13 13:56:09 +0000 | [diff] [blame] | 2924 | Map* external_map; |
| 2925 | { MaybeObject* maybe_obj = |
| 2926 | AllocateMap(JS_OBJECT_TYPE, JSObject::kHeaderSize + kPointerSize); |
| 2927 | if (!maybe_obj->To(&external_map)) return false; |
| 2928 | } |
| 2929 | external_map->set_is_extensible(false); |
| 2930 | set_external_map(external_map); |
| 2931 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2932 | ASSERT(!InNewSpace(empty_fixed_array())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2933 | return true; |
| 2934 | } |
| 2935 | |
| 2936 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2937 | MaybeObject* Heap::AllocateHeapNumber(double value, PretenureFlag pretenure) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2938 | // Statically ensure that it is safe to allocate heap numbers in paged |
| 2939 | // spaces. |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 2940 | int size = HeapNumber::kSize; |
yangguo@chromium.org | ab30bb8 | 2012-02-24 14:41:46 +0000 | [diff] [blame] | 2941 | STATIC_ASSERT(HeapNumber::kSize <= Page::kNonCodeObjectAreaSize); |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 2942 | AllocationSpace space = SelectSpace(size, OLD_DATA_SPACE, pretenure); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 2943 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2944 | Object* result; |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 2945 | { MaybeObject* maybe_result = AllocateRaw(size, space, OLD_DATA_SPACE); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2946 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 2947 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2948 | |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 2949 | HeapObject::cast(result)->set_map_no_write_barrier(heap_number_map()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2950 | HeapNumber::cast(result)->set_value(value); |
| 2951 | return result; |
| 2952 | } |
| 2953 | |
| 2954 | |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 2955 | MaybeObject* Heap::AllocateCell(Object* value) { |
bmeurer@chromium.org | e94b5ff | 2013-10-25 09:22:31 +0000 | [diff] [blame^] | 2956 | int size = Cell::kSize; |
| 2957 | STATIC_ASSERT(Cell::kSize <= Page::kNonCodeObjectAreaSize); |
| 2958 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2959 | Object* result; |
bmeurer@chromium.org | e94b5ff | 2013-10-25 09:22:31 +0000 | [diff] [blame^] | 2960 | { MaybeObject* maybe_result = AllocateRaw(size, CELL_SPACE, CELL_SPACE); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2961 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 2962 | } |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 2963 | HeapObject::cast(result)->set_map_no_write_barrier(cell_map()); |
| 2964 | Cell::cast(result)->set_value(value); |
| 2965 | return result; |
| 2966 | } |
| 2967 | |
| 2968 | |
bmeurer@chromium.org | 71f9fca | 2013-10-22 08:00:09 +0000 | [diff] [blame] | 2969 | MaybeObject* Heap::AllocatePropertyCell() { |
bmeurer@chromium.org | e94b5ff | 2013-10-25 09:22:31 +0000 | [diff] [blame^] | 2970 | int size = PropertyCell::kSize; |
| 2971 | STATIC_ASSERT(PropertyCell::kSize <= Page::kNonCodeObjectAreaSize); |
| 2972 | |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 2973 | Object* result; |
bmeurer@chromium.org | e94b5ff | 2013-10-25 09:22:31 +0000 | [diff] [blame^] | 2974 | MaybeObject* maybe_result = |
| 2975 | AllocateRaw(size, PROPERTY_CELL_SPACE, PROPERTY_CELL_SPACE); |
mstarzinger@chromium.org | e0e1b0d | 2013-07-08 08:38:06 +0000 | [diff] [blame] | 2976 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 2977 | |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 2978 | HeapObject::cast(result)->set_map_no_write_barrier( |
| 2979 | global_property_cell_map()); |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 2980 | PropertyCell* cell = PropertyCell::cast(result); |
| 2981 | cell->set_dependent_code(DependentCode::cast(empty_fixed_array()), |
| 2982 | SKIP_WRITE_BARRIER); |
bmeurer@chromium.org | 71f9fca | 2013-10-22 08:00:09 +0000 | [diff] [blame] | 2983 | cell->set_value(the_hole_value()); |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 2984 | cell->set_type(Type::None()); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 2985 | return result; |
| 2986 | } |
| 2987 | |
| 2988 | |
danno@chromium.org | 1fd77d5 | 2013-06-07 16:01:45 +0000 | [diff] [blame] | 2989 | MaybeObject* Heap::AllocateBox(Object* value, PretenureFlag pretenure) { |
| 2990 | Box* result; |
| 2991 | MaybeObject* maybe_result = AllocateStruct(BOX_TYPE); |
| 2992 | if (!maybe_result->To(&result)) return maybe_result; |
| 2993 | result->set_value(value); |
| 2994 | return result; |
| 2995 | } |
| 2996 | |
| 2997 | |
danno@chromium.org | bee5199 | 2013-07-10 14:57:15 +0000 | [diff] [blame] | 2998 | MaybeObject* Heap::AllocateAllocationSite() { |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 2999 | AllocationSite* site; |
danno@chromium.org | bee5199 | 2013-07-10 14:57:15 +0000 | [diff] [blame] | 3000 | MaybeObject* maybe_result = Allocate(allocation_site_map(), |
| 3001 | OLD_POINTER_SPACE); |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 3002 | if (!maybe_result->To(&site)) return maybe_result; |
jkummerow@chromium.org | ba72ec8 | 2013-07-22 09:21:20 +0000 | [diff] [blame] | 3003 | site->Initialize(); |
| 3004 | |
| 3005 | // Link the site |
| 3006 | site->set_weak_next(allocation_sites_list()); |
| 3007 | set_allocation_sites_list(site); |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 3008 | return site; |
danno@chromium.org | bee5199 | 2013-07-10 14:57:15 +0000 | [diff] [blame] | 3009 | } |
| 3010 | |
| 3011 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3012 | MaybeObject* Heap::CreateOddball(const char* to_string, |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3013 | Object* to_number, |
| 3014 | byte kind) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3015 | Object* result; |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 3016 | { MaybeObject* maybe_result = Allocate(oddball_map(), OLD_POINTER_SPACE); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3017 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 3018 | } |
jkummerow@chromium.org | 3d00d0a | 2013-09-04 13:57:32 +0000 | [diff] [blame] | 3019 | return Oddball::cast(result)->Initialize(this, to_string, to_number, kind); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3020 | } |
| 3021 | |
| 3022 | |
| 3023 | bool Heap::CreateApiObjects() { |
| 3024 | Object* obj; |
| 3025 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3026 | { MaybeObject* maybe_obj = AllocateMap(JS_OBJECT_TYPE, JSObject::kHeaderSize); |
| 3027 | if (!maybe_obj->ToObject(&obj)) return false; |
| 3028 | } |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 3029 | // Don't use Smi-only elements optimizations for objects with the neander |
| 3030 | // map. There are too many cases where element values are set directly with a |
| 3031 | // bottleneck to trap the Smi-only -> fast elements transition, and there |
| 3032 | // appears to be no benefit for optimize this case. |
| 3033 | Map* new_neander_map = Map::cast(obj); |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 3034 | new_neander_map->set_elements_kind(TERMINAL_FAST_ELEMENTS_KIND); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 3035 | set_neander_map(new_neander_map); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3036 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3037 | { MaybeObject* maybe_obj = AllocateJSObjectFromMap(neander_map()); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3038 | if (!maybe_obj->ToObject(&obj)) return false; |
| 3039 | } |
| 3040 | Object* elements; |
| 3041 | { MaybeObject* maybe_elements = AllocateFixedArray(2); |
| 3042 | if (!maybe_elements->ToObject(&elements)) return false; |
| 3043 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3044 | FixedArray::cast(elements)->set(0, Smi::FromInt(0)); |
| 3045 | JSObject::cast(obj)->set_elements(FixedArray::cast(elements)); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 3046 | set_message_listeners(JSObject::cast(obj)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3047 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3048 | return true; |
| 3049 | } |
| 3050 | |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 3051 | |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 3052 | void Heap::CreateJSEntryStub() { |
| 3053 | JSEntryStub stub; |
hpayer@chromium.org | 8432c91 | 2013-02-28 15:55:26 +0000 | [diff] [blame] | 3054 | set_js_entry_code(*stub.GetCode(isolate())); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 3055 | } |
| 3056 | |
| 3057 | |
| 3058 | void Heap::CreateJSConstructEntryStub() { |
| 3059 | JSConstructEntryStub stub; |
hpayer@chromium.org | 8432c91 | 2013-02-28 15:55:26 +0000 | [diff] [blame] | 3060 | set_js_construct_entry_code(*stub.GetCode(isolate())); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 3061 | } |
| 3062 | |
| 3063 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3064 | void Heap::CreateFixedStubs() { |
| 3065 | // Here we create roots for fixed stubs. They are needed at GC |
| 3066 | // for cooking and uncooking (check out frames.cc). |
| 3067 | // The eliminates the need for doing dictionary lookup in the |
| 3068 | // stub cache for these stubs. |
yangguo@chromium.org | c03a192 | 2013-02-19 13:55:47 +0000 | [diff] [blame] | 3069 | HandleScope scope(isolate()); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 3070 | // gcc-4.4 has problem generating correct code of following snippet: |
danno@chromium.org | 4d3fe4e | 2011-03-10 10:14:28 +0000 | [diff] [blame] | 3071 | // { JSEntryStub stub; |
| 3072 | // js_entry_code_ = *stub.GetCode(); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 3073 | // } |
danno@chromium.org | 4d3fe4e | 2011-03-10 10:14:28 +0000 | [diff] [blame] | 3074 | // { JSConstructEntryStub stub; |
| 3075 | // js_construct_entry_code_ = *stub.GetCode(); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 3076 | // } |
| 3077 | // To workaround the problem, make separate functions without inlining. |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 3078 | Heap::CreateJSEntryStub(); |
| 3079 | Heap::CreateJSConstructEntryStub(); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 3080 | |
| 3081 | // Create stubs that should be there, so we don't unexpectedly have to |
| 3082 | // create them if we need them during the creation of another stub. |
| 3083 | // Stub creation mixes raw pointers and handles in an unsafe manner so |
| 3084 | // we cannot create stubs while we are creating stubs. |
hpayer@chromium.org | 8432c91 | 2013-02-28 15:55:26 +0000 | [diff] [blame] | 3085 | CodeStub::GenerateStubsAheadOfTime(isolate()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3086 | } |
| 3087 | |
| 3088 | |
| 3089 | bool Heap::CreateInitialObjects() { |
| 3090 | Object* obj; |
| 3091 | |
| 3092 | // The -0 value must be set before NumberFromDouble works. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3093 | { MaybeObject* maybe_obj = AllocateHeapNumber(-0.0, TENURED); |
| 3094 | if (!maybe_obj->ToObject(&obj)) return false; |
| 3095 | } |
svenpanne@chromium.org | a8bb4d9 | 2011-10-10 13:20:40 +0000 | [diff] [blame] | 3096 | set_minus_zero_value(HeapNumber::cast(obj)); |
ulan@chromium.org | 77ca49a | 2013-04-22 09:43:56 +0000 | [diff] [blame] | 3097 | ASSERT(std::signbit(minus_zero_value()->Number()) != 0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3098 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3099 | { MaybeObject* maybe_obj = AllocateHeapNumber(OS::nan_value(), TENURED); |
| 3100 | if (!maybe_obj->ToObject(&obj)) return false; |
| 3101 | } |
svenpanne@chromium.org | a8bb4d9 | 2011-10-10 13:20:40 +0000 | [diff] [blame] | 3102 | set_nan_value(HeapNumber::cast(obj)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3103 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 3104 | { MaybeObject* maybe_obj = AllocateHeapNumber(V8_INFINITY, TENURED); |
| 3105 | if (!maybe_obj->ToObject(&obj)) return false; |
| 3106 | } |
svenpanne@chromium.org | a8bb4d9 | 2011-10-10 13:20:40 +0000 | [diff] [blame] | 3107 | set_infinity_value(HeapNumber::cast(obj)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3108 | |
rossberg@chromium.org | fab1498 | 2012-01-05 15:02:15 +0000 | [diff] [blame] | 3109 | // The hole has not been created yet, but we want to put something |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3110 | // predictable in the gaps in the string table, so lets make that Smi zero. |
rossberg@chromium.org | fab1498 | 2012-01-05 15:02:15 +0000 | [diff] [blame] | 3111 | set_the_hole_value(reinterpret_cast<Oddball*>(Smi::FromInt(0))); |
| 3112 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3113 | // Allocate initial string table. |
ulan@chromium.org | 6e196bf | 2013-03-13 09:38:22 +0000 | [diff] [blame] | 3114 | { MaybeObject* maybe_obj = |
| 3115 | StringTable::Allocate(this, kInitialStringTableSize); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3116 | if (!maybe_obj->ToObject(&obj)) return false; |
| 3117 | } |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3118 | // Don't use set_string_table() due to asserts. |
| 3119 | roots_[kStringTableRootIndex] = obj; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3120 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3121 | // Finish initializing oddballs after creating the string table. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3122 | { MaybeObject* maybe_obj = |
jkummerow@chromium.org | 3d00d0a | 2013-09-04 13:57:32 +0000 | [diff] [blame] | 3123 | undefined_value()->Initialize(this, |
| 3124 | "undefined", |
svenpanne@chromium.org | a8bb4d9 | 2011-10-10 13:20:40 +0000 | [diff] [blame] | 3125 | nan_value(), |
| 3126 | Oddball::kUndefined); |
| 3127 | if (!maybe_obj->ToObject(&obj)) return false; |
| 3128 | } |
| 3129 | |
| 3130 | // Initialize the null_value. |
jkummerow@chromium.org | 3d00d0a | 2013-09-04 13:57:32 +0000 | [diff] [blame] | 3131 | { MaybeObject* maybe_obj = null_value()->Initialize( |
| 3132 | this, "null", Smi::FromInt(0), Oddball::kNull); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3133 | if (!maybe_obj->ToObject(&obj)) return false; |
| 3134 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3135 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3136 | { MaybeObject* maybe_obj = CreateOddball("true", |
| 3137 | Smi::FromInt(1), |
| 3138 | Oddball::kTrue); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3139 | if (!maybe_obj->ToObject(&obj)) return false; |
| 3140 | } |
svenpanne@chromium.org | a8bb4d9 | 2011-10-10 13:20:40 +0000 | [diff] [blame] | 3141 | set_true_value(Oddball::cast(obj)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3142 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3143 | { MaybeObject* maybe_obj = CreateOddball("false", |
| 3144 | Smi::FromInt(0), |
| 3145 | Oddball::kFalse); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3146 | if (!maybe_obj->ToObject(&obj)) return false; |
| 3147 | } |
svenpanne@chromium.org | a8bb4d9 | 2011-10-10 13:20:40 +0000 | [diff] [blame] | 3148 | set_false_value(Oddball::cast(obj)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3149 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3150 | { MaybeObject* maybe_obj = CreateOddball("hole", |
| 3151 | Smi::FromInt(-1), |
| 3152 | Oddball::kTheHole); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3153 | if (!maybe_obj->ToObject(&obj)) return false; |
| 3154 | } |
svenpanne@chromium.org | a8bb4d9 | 2011-10-10 13:20:40 +0000 | [diff] [blame] | 3155 | set_the_hole_value(Oddball::cast(obj)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3156 | |
danno@chromium.org | 1fd77d5 | 2013-06-07 16:01:45 +0000 | [diff] [blame] | 3157 | { MaybeObject* maybe_obj = CreateOddball("uninitialized", |
| 3158 | Smi::FromInt(-1), |
| 3159 | Oddball::kUninitialized); |
| 3160 | if (!maybe_obj->ToObject(&obj)) return false; |
| 3161 | } |
| 3162 | set_uninitialized_value(Oddball::cast(obj)); |
| 3163 | |
kmillikin@chromium.org | d2c22f0 | 2011-01-10 08:15:37 +0000 | [diff] [blame] | 3164 | { MaybeObject* maybe_obj = CreateOddball("arguments_marker", |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 3165 | Smi::FromInt(-4), |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3166 | Oddball::kArgumentMarker); |
kmillikin@chromium.org | d2c22f0 | 2011-01-10 08:15:37 +0000 | [diff] [blame] | 3167 | if (!maybe_obj->ToObject(&obj)) return false; |
| 3168 | } |
svenpanne@chromium.org | a8bb4d9 | 2011-10-10 13:20:40 +0000 | [diff] [blame] | 3169 | set_arguments_marker(Oddball::cast(obj)); |
kmillikin@chromium.org | d2c22f0 | 2011-01-10 08:15:37 +0000 | [diff] [blame] | 3170 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3171 | { MaybeObject* maybe_obj = CreateOddball("no_interceptor_result_sentinel", |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 3172 | Smi::FromInt(-2), |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3173 | Oddball::kOther); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3174 | if (!maybe_obj->ToObject(&obj)) return false; |
| 3175 | } |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 3176 | set_no_interceptor_result_sentinel(obj); |
| 3177 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3178 | { MaybeObject* maybe_obj = CreateOddball("termination_exception", |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 3179 | Smi::FromInt(-3), |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3180 | Oddball::kOther); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3181 | if (!maybe_obj->ToObject(&obj)) return false; |
| 3182 | } |
sgjesse@chromium.org | c81c894 | 2009-08-21 10:54:26 +0000 | [diff] [blame] | 3183 | set_termination_exception(obj); |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 3184 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3185 | for (unsigned i = 0; i < ARRAY_SIZE(constant_string_table); i++) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3186 | { MaybeObject* maybe_obj = |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3187 | InternalizeUtf8String(constant_string_table[i].contents); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3188 | if (!maybe_obj->ToObject(&obj)) return false; |
| 3189 | } |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3190 | roots_[constant_string_table[i].index] = String::cast(obj); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 3191 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3192 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3193 | // Allocate the hidden string which is used to identify the hidden properties |
ager@chromium.org | 3b45ab5 | 2009-03-19 22:21:34 +0000 | [diff] [blame] | 3194 | // in JSObjects. The hash code has a special value so that it will not match |
| 3195 | // the empty string when searching for the property. It cannot be part of the |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 3196 | // loop above because it needs to be allocated manually with the special |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3197 | // hash code in place. The hash code for the hidden_string is zero to ensure |
ager@chromium.org | 3b45ab5 | 2009-03-19 22:21:34 +0000 | [diff] [blame] | 3198 | // that it will always be at the first entry in property descriptors. |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3199 | { MaybeObject* maybe_obj = AllocateOneByteInternalizedString( |
| 3200 | OneByteVector("", 0), String::kEmptyStringHash); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3201 | if (!maybe_obj->ToObject(&obj)) return false; |
| 3202 | } |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3203 | hidden_string_ = String::cast(obj); |
ager@chromium.org | 3b45ab5 | 2009-03-19 22:21:34 +0000 | [diff] [blame] | 3204 | |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 3205 | // Allocate the code_stubs dictionary. The initial size is set to avoid |
| 3206 | // expanding the dictionary during bootstrapping. |
ulan@chromium.org | 6e196bf | 2013-03-13 09:38:22 +0000 | [diff] [blame] | 3207 | { MaybeObject* maybe_obj = UnseededNumberDictionary::Allocate(this, 128); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3208 | if (!maybe_obj->ToObject(&obj)) return false; |
| 3209 | } |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 3210 | set_code_stubs(UnseededNumberDictionary::cast(obj)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3211 | |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 3212 | |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 3213 | // Allocate the non_monomorphic_cache used in stub-cache.cc. The initial size |
| 3214 | // is set to avoid expanding the dictionary during bootstrapping. |
ulan@chromium.org | 6e196bf | 2013-03-13 09:38:22 +0000 | [diff] [blame] | 3215 | { MaybeObject* maybe_obj = UnseededNumberDictionary::Allocate(this, 64); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3216 | if (!maybe_obj->ToObject(&obj)) return false; |
| 3217 | } |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 3218 | set_non_monomorphic_cache(UnseededNumberDictionary::cast(obj)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3219 | |
jkummerow@chromium.org | e297f59 | 2011-06-08 10:05:15 +0000 | [diff] [blame] | 3220 | { MaybeObject* maybe_obj = AllocatePolymorphicCodeCache(); |
| 3221 | if (!maybe_obj->ToObject(&obj)) return false; |
| 3222 | } |
| 3223 | set_polymorphic_code_cache(PolymorphicCodeCache::cast(obj)); |
| 3224 | |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 3225 | set_instanceof_cache_function(Smi::FromInt(0)); |
| 3226 | set_instanceof_cache_map(Smi::FromInt(0)); |
| 3227 | set_instanceof_cache_answer(Smi::FromInt(0)); |
| 3228 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3229 | CreateFixedStubs(); |
| 3230 | |
erik.corry@gmail.com | d88afa2 | 2010-09-15 12:33:05 +0000 | [diff] [blame] | 3231 | // Allocate the dictionary of intrinsic function names. |
ulan@chromium.org | 6e196bf | 2013-03-13 09:38:22 +0000 | [diff] [blame] | 3232 | { MaybeObject* maybe_obj = |
| 3233 | NameDictionary::Allocate(this, Runtime::kNumFunctions); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3234 | if (!maybe_obj->ToObject(&obj)) return false; |
| 3235 | } |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3236 | { MaybeObject* maybe_obj = Runtime::InitializeIntrinsicFunctionNames(this, |
| 3237 | obj); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3238 | if (!maybe_obj->ToObject(&obj)) return false; |
| 3239 | } |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 3240 | set_intrinsic_function_names(NameDictionary::cast(obj)); |
erik.corry@gmail.com | d88afa2 | 2010-09-15 12:33:05 +0000 | [diff] [blame] | 3241 | |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 3242 | { MaybeObject* maybe_obj = AllocateInitialNumberStringCache(); |
| 3243 | if (!maybe_obj->ToObject(&obj)) return false; |
| 3244 | } |
| 3245 | set_number_string_cache(FixedArray::cast(obj)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3246 | |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 3247 | // Allocate cache for single character one byte strings. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3248 | { MaybeObject* maybe_obj = |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 3249 | AllocateFixedArray(String::kMaxOneByteCharCode + 1, TENURED); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3250 | if (!maybe_obj->ToObject(&obj)) return false; |
| 3251 | } |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 3252 | set_single_character_string_cache(FixedArray::cast(obj)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3253 | |
jkummerow@chromium.org | 486075a | 2011-09-07 12:44:28 +0000 | [diff] [blame] | 3254 | // Allocate cache for string split. |
jkummerow@chromium.org | 78502a9 | 2012-09-06 13:50:42 +0000 | [diff] [blame] | 3255 | { MaybeObject* maybe_obj = AllocateFixedArray( |
| 3256 | RegExpResultsCache::kRegExpResultsCacheSize, TENURED); |
jkummerow@chromium.org | 486075a | 2011-09-07 12:44:28 +0000 | [diff] [blame] | 3257 | if (!maybe_obj->ToObject(&obj)) return false; |
| 3258 | } |
| 3259 | set_string_split_cache(FixedArray::cast(obj)); |
| 3260 | |
jkummerow@chromium.org | 78502a9 | 2012-09-06 13:50:42 +0000 | [diff] [blame] | 3261 | { MaybeObject* maybe_obj = AllocateFixedArray( |
| 3262 | RegExpResultsCache::kRegExpResultsCacheSize, TENURED); |
| 3263 | if (!maybe_obj->ToObject(&obj)) return false; |
| 3264 | } |
| 3265 | set_regexp_multiple_cache(FixedArray::cast(obj)); |
| 3266 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3267 | // Allocate cache for external strings pointing to native source code. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3268 | { MaybeObject* maybe_obj = AllocateFixedArray(Natives::GetBuiltinsCount()); |
| 3269 | if (!maybe_obj->ToObject(&obj)) return false; |
| 3270 | } |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 3271 | set_natives_source_cache(FixedArray::cast(obj)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3272 | |
mvstanton@chromium.org | e4ac3ef | 2012-11-12 14:53:34 +0000 | [diff] [blame] | 3273 | // Allocate object to hold object observation state. |
| 3274 | { MaybeObject* maybe_obj = AllocateMap(JS_OBJECT_TYPE, JSObject::kHeaderSize); |
| 3275 | if (!maybe_obj->ToObject(&obj)) return false; |
| 3276 | } |
| 3277 | { MaybeObject* maybe_obj = AllocateJSObjectFromMap(Map::cast(obj)); |
| 3278 | if (!maybe_obj->ToObject(&obj)) return false; |
| 3279 | } |
| 3280 | set_observation_state(JSObject::cast(obj)); |
| 3281 | |
svenpanne@chromium.org | a53e8e0 | 2013-05-24 12:35:50 +0000 | [diff] [blame] | 3282 | { MaybeObject* maybe_obj = AllocateSymbol(); |
| 3283 | if (!maybe_obj->ToObject(&obj)) return false; |
| 3284 | } |
| 3285 | set_frozen_symbol(Symbol::cast(obj)); |
| 3286 | |
danno@chromium.org | d3c4210 | 2013-08-01 16:58:23 +0000 | [diff] [blame] | 3287 | { MaybeObject* maybe_obj = AllocateSymbol(); |
| 3288 | if (!maybe_obj->ToObject(&obj)) return false; |
| 3289 | } |
| 3290 | set_elements_transition_symbol(Symbol::cast(obj)); |
| 3291 | |
svenpanne@chromium.org | a53e8e0 | 2013-05-24 12:35:50 +0000 | [diff] [blame] | 3292 | { MaybeObject* maybe_obj = SeededNumberDictionary::Allocate(this, 0, TENURED); |
| 3293 | if (!maybe_obj->ToObject(&obj)) return false; |
| 3294 | } |
| 3295 | SeededNumberDictionary::cast(obj)->set_requires_slow_elements(); |
| 3296 | set_empty_slow_element_dictionary(SeededNumberDictionary::cast(obj)); |
| 3297 | |
danno@chromium.org | 169691d | 2013-07-15 08:01:13 +0000 | [diff] [blame] | 3298 | { MaybeObject* maybe_obj = AllocateSymbol(); |
| 3299 | if (!maybe_obj->ToObject(&obj)) return false; |
| 3300 | } |
| 3301 | set_observed_symbol(Symbol::cast(obj)); |
| 3302 | |
verwaest@chromium.org | d4be0f0 | 2013-06-05 13:39:03 +0000 | [diff] [blame] | 3303 | // Handling of script id generation is in Factory::NewScript. |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 3304 | set_last_script_id(Smi::FromInt(v8::Script::kNoScriptId)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3305 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 3306 | // Initialize keyed lookup cache. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3307 | isolate_->keyed_lookup_cache()->Clear(); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 3308 | |
| 3309 | // Initialize context slot cache. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3310 | isolate_->context_slot_cache()->Clear(); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 3311 | |
| 3312 | // Initialize descriptor cache. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3313 | isolate_->descriptor_lookup_cache()->Clear(); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 3314 | |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 3315 | // Initialize compilation cache. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3316 | isolate_->compilation_cache()->Clear(); |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 3317 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3318 | return true; |
| 3319 | } |
| 3320 | |
| 3321 | |
mvstanton@chromium.org | e4ac3ef | 2012-11-12 14:53:34 +0000 | [diff] [blame] | 3322 | bool Heap::RootCanBeWrittenAfterInitialization(Heap::RootListIndex root_index) { |
| 3323 | RootListIndex writable_roots[] = { |
| 3324 | kStoreBufferTopRootIndex, |
| 3325 | kStackLimitRootIndex, |
ulan@chromium.org | 4121f23 | 2012-12-27 15:57:11 +0000 | [diff] [blame] | 3326 | kNumberStringCacheRootIndex, |
mvstanton@chromium.org | e4ac3ef | 2012-11-12 14:53:34 +0000 | [diff] [blame] | 3327 | kInstanceofCacheFunctionRootIndex, |
| 3328 | kInstanceofCacheMapRootIndex, |
| 3329 | kInstanceofCacheAnswerRootIndex, |
| 3330 | kCodeStubsRootIndex, |
| 3331 | kNonMonomorphicCacheRootIndex, |
| 3332 | kPolymorphicCodeCacheRootIndex, |
| 3333 | kLastScriptIdRootIndex, |
| 3334 | kEmptyScriptRootIndex, |
| 3335 | kRealStackLimitRootIndex, |
| 3336 | kArgumentsAdaptorDeoptPCOffsetRootIndex, |
| 3337 | kConstructStubDeoptPCOffsetRootIndex, |
| 3338 | kGetterStubDeoptPCOffsetRootIndex, |
| 3339 | kSetterStubDeoptPCOffsetRootIndex, |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3340 | kStringTableRootIndex, |
mvstanton@chromium.org | e4ac3ef | 2012-11-12 14:53:34 +0000 | [diff] [blame] | 3341 | }; |
| 3342 | |
| 3343 | for (unsigned int i = 0; i < ARRAY_SIZE(writable_roots); i++) { |
| 3344 | if (root_index == writable_roots[i]) |
| 3345 | return true; |
| 3346 | } |
| 3347 | return false; |
| 3348 | } |
| 3349 | |
| 3350 | |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 3351 | bool Heap::RootCanBeTreatedAsConstant(RootListIndex root_index) { |
| 3352 | return !RootCanBeWrittenAfterInitialization(root_index) && |
| 3353 | !InNewSpace(roots_array_start()[root_index]); |
| 3354 | } |
| 3355 | |
| 3356 | |
jkummerow@chromium.org | 78502a9 | 2012-09-06 13:50:42 +0000 | [diff] [blame] | 3357 | Object* RegExpResultsCache::Lookup(Heap* heap, |
| 3358 | String* key_string, |
| 3359 | Object* key_pattern, |
| 3360 | ResultsCacheType type) { |
| 3361 | FixedArray* cache; |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3362 | if (!key_string->IsInternalizedString()) return Smi::FromInt(0); |
jkummerow@chromium.org | 78502a9 | 2012-09-06 13:50:42 +0000 | [diff] [blame] | 3363 | if (type == STRING_SPLIT_SUBSTRINGS) { |
| 3364 | ASSERT(key_pattern->IsString()); |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3365 | if (!key_pattern->IsInternalizedString()) return Smi::FromInt(0); |
jkummerow@chromium.org | 78502a9 | 2012-09-06 13:50:42 +0000 | [diff] [blame] | 3366 | cache = heap->string_split_cache(); |
| 3367 | } else { |
| 3368 | ASSERT(type == REGEXP_MULTIPLE_INDICES); |
| 3369 | ASSERT(key_pattern->IsFixedArray()); |
| 3370 | cache = heap->regexp_multiple_cache(); |
| 3371 | } |
| 3372 | |
| 3373 | uint32_t hash = key_string->Hash(); |
| 3374 | uint32_t index = ((hash & (kRegExpResultsCacheSize - 1)) & |
jkummerow@chromium.org | 486075a | 2011-09-07 12:44:28 +0000 | [diff] [blame] | 3375 | ~(kArrayEntriesPerCacheEntry - 1)); |
jkummerow@chromium.org | 78502a9 | 2012-09-06 13:50:42 +0000 | [diff] [blame] | 3376 | if (cache->get(index + kStringOffset) == key_string && |
| 3377 | cache->get(index + kPatternOffset) == key_pattern) { |
jkummerow@chromium.org | 486075a | 2011-09-07 12:44:28 +0000 | [diff] [blame] | 3378 | return cache->get(index + kArrayOffset); |
| 3379 | } |
jkummerow@chromium.org | 78502a9 | 2012-09-06 13:50:42 +0000 | [diff] [blame] | 3380 | index = |
| 3381 | ((index + kArrayEntriesPerCacheEntry) & (kRegExpResultsCacheSize - 1)); |
| 3382 | if (cache->get(index + kStringOffset) == key_string && |
| 3383 | cache->get(index + kPatternOffset) == key_pattern) { |
jkummerow@chromium.org | 486075a | 2011-09-07 12:44:28 +0000 | [diff] [blame] | 3384 | return cache->get(index + kArrayOffset); |
| 3385 | } |
| 3386 | return Smi::FromInt(0); |
| 3387 | } |
| 3388 | |
| 3389 | |
jkummerow@chromium.org | 78502a9 | 2012-09-06 13:50:42 +0000 | [diff] [blame] | 3390 | void RegExpResultsCache::Enter(Heap* heap, |
| 3391 | String* key_string, |
| 3392 | Object* key_pattern, |
| 3393 | FixedArray* value_array, |
| 3394 | ResultsCacheType type) { |
| 3395 | FixedArray* cache; |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3396 | if (!key_string->IsInternalizedString()) return; |
jkummerow@chromium.org | 78502a9 | 2012-09-06 13:50:42 +0000 | [diff] [blame] | 3397 | if (type == STRING_SPLIT_SUBSTRINGS) { |
| 3398 | ASSERT(key_pattern->IsString()); |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3399 | if (!key_pattern->IsInternalizedString()) return; |
jkummerow@chromium.org | 78502a9 | 2012-09-06 13:50:42 +0000 | [diff] [blame] | 3400 | cache = heap->string_split_cache(); |
| 3401 | } else { |
| 3402 | ASSERT(type == REGEXP_MULTIPLE_INDICES); |
| 3403 | ASSERT(key_pattern->IsFixedArray()); |
| 3404 | cache = heap->regexp_multiple_cache(); |
| 3405 | } |
| 3406 | |
| 3407 | uint32_t hash = key_string->Hash(); |
| 3408 | uint32_t index = ((hash & (kRegExpResultsCacheSize - 1)) & |
jkummerow@chromium.org | 486075a | 2011-09-07 12:44:28 +0000 | [diff] [blame] | 3409 | ~(kArrayEntriesPerCacheEntry - 1)); |
| 3410 | if (cache->get(index + kStringOffset) == Smi::FromInt(0)) { |
jkummerow@chromium.org | 78502a9 | 2012-09-06 13:50:42 +0000 | [diff] [blame] | 3411 | cache->set(index + kStringOffset, key_string); |
| 3412 | cache->set(index + kPatternOffset, key_pattern); |
| 3413 | cache->set(index + kArrayOffset, value_array); |
ricow@chromium.org | 55ee807 | 2011-09-08 16:33:10 +0000 | [diff] [blame] | 3414 | } else { |
| 3415 | uint32_t index2 = |
jkummerow@chromium.org | 78502a9 | 2012-09-06 13:50:42 +0000 | [diff] [blame] | 3416 | ((index + kArrayEntriesPerCacheEntry) & (kRegExpResultsCacheSize - 1)); |
ricow@chromium.org | 55ee807 | 2011-09-08 16:33:10 +0000 | [diff] [blame] | 3417 | if (cache->get(index2 + kStringOffset) == Smi::FromInt(0)) { |
jkummerow@chromium.org | 78502a9 | 2012-09-06 13:50:42 +0000 | [diff] [blame] | 3418 | cache->set(index2 + kStringOffset, key_string); |
| 3419 | cache->set(index2 + kPatternOffset, key_pattern); |
| 3420 | cache->set(index2 + kArrayOffset, value_array); |
ricow@chromium.org | 55ee807 | 2011-09-08 16:33:10 +0000 | [diff] [blame] | 3421 | } else { |
| 3422 | cache->set(index2 + kStringOffset, Smi::FromInt(0)); |
| 3423 | cache->set(index2 + kPatternOffset, Smi::FromInt(0)); |
| 3424 | cache->set(index2 + kArrayOffset, Smi::FromInt(0)); |
jkummerow@chromium.org | 78502a9 | 2012-09-06 13:50:42 +0000 | [diff] [blame] | 3425 | cache->set(index + kStringOffset, key_string); |
| 3426 | cache->set(index + kPatternOffset, key_pattern); |
| 3427 | cache->set(index + kArrayOffset, value_array); |
ricow@chromium.org | 55ee807 | 2011-09-08 16:33:10 +0000 | [diff] [blame] | 3428 | } |
jkummerow@chromium.org | 486075a | 2011-09-07 12:44:28 +0000 | [diff] [blame] | 3429 | } |
jkummerow@chromium.org | 78502a9 | 2012-09-06 13:50:42 +0000 | [diff] [blame] | 3430 | // If the array is a reasonably short list of substrings, convert it into a |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3431 | // list of internalized strings. |
jkummerow@chromium.org | 78502a9 | 2012-09-06 13:50:42 +0000 | [diff] [blame] | 3432 | if (type == STRING_SPLIT_SUBSTRINGS && value_array->length() < 100) { |
| 3433 | for (int i = 0; i < value_array->length(); i++) { |
| 3434 | String* str = String::cast(value_array->get(i)); |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3435 | Object* internalized_str; |
| 3436 | MaybeObject* maybe_string = heap->InternalizeString(str); |
| 3437 | if (maybe_string->ToObject(&internalized_str)) { |
| 3438 | value_array->set(i, internalized_str); |
jkummerow@chromium.org | 486075a | 2011-09-07 12:44:28 +0000 | [diff] [blame] | 3439 | } |
| 3440 | } |
| 3441 | } |
jkummerow@chromium.org | 78502a9 | 2012-09-06 13:50:42 +0000 | [diff] [blame] | 3442 | // Convert backing store to a copy-on-write array. |
| 3443 | value_array->set_map_no_write_barrier(heap->fixed_cow_array_map()); |
jkummerow@chromium.org | 486075a | 2011-09-07 12:44:28 +0000 | [diff] [blame] | 3444 | } |
| 3445 | |
| 3446 | |
jkummerow@chromium.org | 78502a9 | 2012-09-06 13:50:42 +0000 | [diff] [blame] | 3447 | void RegExpResultsCache::Clear(FixedArray* cache) { |
| 3448 | for (int i = 0; i < kRegExpResultsCacheSize; i++) { |
jkummerow@chromium.org | 486075a | 2011-09-07 12:44:28 +0000 | [diff] [blame] | 3449 | cache->set(i, Smi::FromInt(0)); |
| 3450 | } |
| 3451 | } |
| 3452 | |
| 3453 | |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 3454 | MaybeObject* Heap::AllocateInitialNumberStringCache() { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3455 | MaybeObject* maybe_obj = |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 3456 | AllocateFixedArray(kInitialNumberStringCacheSize * 2, TENURED); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3457 | return maybe_obj; |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 3458 | } |
| 3459 | |
| 3460 | |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 3461 | int Heap::FullSizeNumberStringCacheLength() { |
| 3462 | // Compute the size of the number string cache based on the max newspace size. |
| 3463 | // The number string cache has a minimum size based on twice the initial cache |
| 3464 | // size to ensure that it is bigger after being made 'full size'. |
| 3465 | int number_string_cache_size = max_semispace_size_ / 512; |
| 3466 | number_string_cache_size = Max(kInitialNumberStringCacheSize * 2, |
| 3467 | Min(0x4000, number_string_cache_size)); |
| 3468 | // There is a string and a number per entry so the length is twice the number |
| 3469 | // of entries. |
| 3470 | return number_string_cache_size * 2; |
| 3471 | } |
| 3472 | |
| 3473 | |
| 3474 | void Heap::AllocateFullSizeNumberStringCache() { |
| 3475 | // The idea is to have a small number string cache in the snapshot to keep |
| 3476 | // boot-time memory usage down. If we expand the number string cache already |
| 3477 | // while creating the snapshot then that didn't work out. |
yangguo@chromium.org | 5a11aaf | 2012-06-20 11:29:00 +0000 | [diff] [blame] | 3478 | ASSERT(!Serializer::enabled() || FLAG_extra_code != NULL); |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 3479 | MaybeObject* maybe_obj = |
| 3480 | AllocateFixedArray(FullSizeNumberStringCacheLength(), TENURED); |
| 3481 | Object* new_cache; |
| 3482 | if (maybe_obj->ToObject(&new_cache)) { |
| 3483 | // We don't bother to repopulate the cache with entries from the old cache. |
| 3484 | // It will be repopulated soon enough with new strings. |
| 3485 | set_number_string_cache(FixedArray::cast(new_cache)); |
| 3486 | } |
| 3487 | // If allocation fails then we just return without doing anything. It is only |
| 3488 | // a cache, so best effort is OK here. |
| 3489 | } |
| 3490 | |
| 3491 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 3492 | void Heap::FlushNumberStringCache() { |
| 3493 | // Flush the number to string cache. |
| 3494 | int len = number_string_cache()->length(); |
| 3495 | for (int i = 0; i < len; i++) { |
mstarzinger@chromium.org | 1f410f9 | 2013-08-29 08:13:16 +0000 | [diff] [blame] | 3496 | number_string_cache()->set_undefined(i); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 3497 | } |
| 3498 | } |
| 3499 | |
| 3500 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3501 | static inline int double_get_hash(double d) { |
| 3502 | DoubleRepresentation rep(d); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 3503 | return static_cast<int>(rep.bits) ^ static_cast<int>(rep.bits >> 32); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3504 | } |
| 3505 | |
| 3506 | |
| 3507 | static inline int smi_get_hash(Smi* smi) { |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 3508 | return smi->value(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3509 | } |
| 3510 | |
| 3511 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3512 | Object* Heap::GetNumberStringCache(Object* number) { |
| 3513 | int hash; |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 3514 | int mask = (number_string_cache()->length() >> 1) - 1; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3515 | if (number->IsSmi()) { |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 3516 | hash = smi_get_hash(Smi::cast(number)) & mask; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3517 | } else { |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 3518 | hash = double_get_hash(number->Number()) & mask; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3519 | } |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 3520 | Object* key = number_string_cache()->get(hash * 2); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3521 | if (key == number) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 3522 | return String::cast(number_string_cache()->get(hash * 2 + 1)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3523 | } else if (key->IsHeapNumber() && |
| 3524 | number->IsHeapNumber() && |
| 3525 | key->Number() == number->Number()) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 3526 | return String::cast(number_string_cache()->get(hash * 2 + 1)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3527 | } |
| 3528 | return undefined_value(); |
| 3529 | } |
| 3530 | |
| 3531 | |
| 3532 | void Heap::SetNumberStringCache(Object* number, String* string) { |
| 3533 | int hash; |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 3534 | int mask = (number_string_cache()->length() >> 1) - 1; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3535 | if (number->IsSmi()) { |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 3536 | hash = smi_get_hash(Smi::cast(number)) & mask; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3537 | } else { |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 3538 | hash = double_get_hash(number->Number()) & mask; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3539 | } |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 3540 | if (number_string_cache()->get(hash * 2) != undefined_value() && |
| 3541 | number_string_cache()->length() != FullSizeNumberStringCacheLength()) { |
| 3542 | // The first time we have a hash collision, we move to the full sized |
| 3543 | // number string cache. |
| 3544 | AllocateFullSizeNumberStringCache(); |
| 3545 | return; |
| 3546 | } |
| 3547 | number_string_cache()->set(hash * 2, number); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 3548 | number_string_cache()->set(hash * 2 + 1, string); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3549 | } |
| 3550 | |
| 3551 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3552 | MaybeObject* Heap::NumberToString(Object* number, |
ulan@chromium.org | 57ff881 | 2013-05-10 08:16:55 +0000 | [diff] [blame] | 3553 | bool check_number_string_cache, |
| 3554 | PretenureFlag pretenure) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3555 | isolate_->counters()->number_to_string_runtime()->Increment(); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 3556 | if (check_number_string_cache) { |
| 3557 | Object* cached = GetNumberStringCache(number); |
| 3558 | if (cached != undefined_value()) { |
| 3559 | return cached; |
| 3560 | } |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 3561 | } |
| 3562 | |
| 3563 | char arr[100]; |
| 3564 | Vector<char> buffer(arr, ARRAY_SIZE(arr)); |
| 3565 | const char* str; |
| 3566 | if (number->IsSmi()) { |
| 3567 | int num = Smi::cast(number)->value(); |
| 3568 | str = IntToCString(num, buffer); |
| 3569 | } else { |
| 3570 | double num = HeapNumber::cast(number)->value(); |
| 3571 | str = DoubleToCString(num, buffer); |
| 3572 | } |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 3573 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3574 | Object* js_string; |
ulan@chromium.org | 57ff881 | 2013-05-10 08:16:55 +0000 | [diff] [blame] | 3575 | MaybeObject* maybe_js_string = |
| 3576 | AllocateStringFromOneByte(CStrVector(str), pretenure); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3577 | if (maybe_js_string->ToObject(&js_string)) { |
| 3578 | SetNumberStringCache(number, String::cast(js_string)); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 3579 | } |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3580 | return maybe_js_string; |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 3581 | } |
| 3582 | |
| 3583 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 3584 | MaybeObject* Heap::Uint32ToString(uint32_t value, |
| 3585 | bool check_number_string_cache) { |
| 3586 | Object* number; |
| 3587 | MaybeObject* maybe = NumberFromUint32(value); |
| 3588 | if (!maybe->To<Object>(&number)) return maybe; |
| 3589 | return NumberToString(number, check_number_string_cache); |
| 3590 | } |
| 3591 | |
| 3592 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 3593 | Map* Heap::MapForExternalArrayType(ExternalArrayType array_type) { |
| 3594 | return Map::cast(roots_[RootIndexForExternalArrayType(array_type)]); |
| 3595 | } |
| 3596 | |
| 3597 | |
| 3598 | Heap::RootListIndex Heap::RootIndexForExternalArrayType( |
| 3599 | ExternalArrayType array_type) { |
| 3600 | switch (array_type) { |
| 3601 | case kExternalByteArray: |
| 3602 | return kExternalByteArrayMapRootIndex; |
| 3603 | case kExternalUnsignedByteArray: |
| 3604 | return kExternalUnsignedByteArrayMapRootIndex; |
| 3605 | case kExternalShortArray: |
| 3606 | return kExternalShortArrayMapRootIndex; |
| 3607 | case kExternalUnsignedShortArray: |
| 3608 | return kExternalUnsignedShortArrayMapRootIndex; |
| 3609 | case kExternalIntArray: |
| 3610 | return kExternalIntArrayMapRootIndex; |
| 3611 | case kExternalUnsignedIntArray: |
| 3612 | return kExternalUnsignedIntArrayMapRootIndex; |
| 3613 | case kExternalFloatArray: |
| 3614 | return kExternalFloatArrayMapRootIndex; |
erik.corry@gmail.com | 3847bd5 | 2011-04-27 10:38:56 +0000 | [diff] [blame] | 3615 | case kExternalDoubleArray: |
| 3616 | return kExternalDoubleArrayMapRootIndex; |
danno@chromium.org | 4d3fe4e | 2011-03-10 10:14:28 +0000 | [diff] [blame] | 3617 | case kExternalPixelArray: |
| 3618 | return kExternalPixelArrayMapRootIndex; |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 3619 | default: |
| 3620 | UNREACHABLE(); |
| 3621 | return kUndefinedValueRootIndex; |
| 3622 | } |
| 3623 | } |
| 3624 | |
jkummerow@chromium.org | 4e308cf | 2013-05-17 13:39:16 +0000 | [diff] [blame] | 3625 | Heap::RootListIndex Heap::RootIndexForEmptyExternalArray( |
| 3626 | ElementsKind elementsKind) { |
| 3627 | switch (elementsKind) { |
| 3628 | case EXTERNAL_BYTE_ELEMENTS: |
| 3629 | return kEmptyExternalByteArrayRootIndex; |
| 3630 | case EXTERNAL_UNSIGNED_BYTE_ELEMENTS: |
| 3631 | return kEmptyExternalUnsignedByteArrayRootIndex; |
| 3632 | case EXTERNAL_SHORT_ELEMENTS: |
| 3633 | return kEmptyExternalShortArrayRootIndex; |
| 3634 | case EXTERNAL_UNSIGNED_SHORT_ELEMENTS: |
| 3635 | return kEmptyExternalUnsignedShortArrayRootIndex; |
| 3636 | case EXTERNAL_INT_ELEMENTS: |
| 3637 | return kEmptyExternalIntArrayRootIndex; |
| 3638 | case EXTERNAL_UNSIGNED_INT_ELEMENTS: |
| 3639 | return kEmptyExternalUnsignedIntArrayRootIndex; |
| 3640 | case EXTERNAL_FLOAT_ELEMENTS: |
| 3641 | return kEmptyExternalFloatArrayRootIndex; |
| 3642 | case EXTERNAL_DOUBLE_ELEMENTS: |
| 3643 | return kEmptyExternalDoubleArrayRootIndex; |
| 3644 | case EXTERNAL_PIXEL_ELEMENTS: |
| 3645 | return kEmptyExternalPixelArrayRootIndex; |
| 3646 | default: |
| 3647 | UNREACHABLE(); |
| 3648 | return kUndefinedValueRootIndex; |
| 3649 | } |
| 3650 | } |
| 3651 | |
mstarzinger@chromium.org | e0e1b0d | 2013-07-08 08:38:06 +0000 | [diff] [blame] | 3652 | |
jkummerow@chromium.org | 4e308cf | 2013-05-17 13:39:16 +0000 | [diff] [blame] | 3653 | ExternalArray* Heap::EmptyExternalArrayForMap(Map* map) { |
| 3654 | return ExternalArray::cast( |
| 3655 | roots_[RootIndexForEmptyExternalArray(map->elements_kind())]); |
| 3656 | } |
| 3657 | |
| 3658 | |
| 3659 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 3660 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3661 | MaybeObject* Heap::NumberFromDouble(double value, PretenureFlag pretenure) { |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 3662 | // We need to distinguish the minus zero value and this cannot be |
| 3663 | // done after conversion to int. Doing this by comparing bit |
| 3664 | // patterns is faster than using fpclassify() et al. |
| 3665 | static const DoubleRepresentation minus_zero(-0.0); |
| 3666 | |
| 3667 | DoubleRepresentation rep(value); |
| 3668 | if (rep.bits == minus_zero.bits) { |
| 3669 | return AllocateHeapNumber(-0.0, pretenure); |
| 3670 | } |
| 3671 | |
| 3672 | int int_value = FastD2I(value); |
| 3673 | if (value == int_value && Smi::IsValid(int_value)) { |
| 3674 | return Smi::FromInt(int_value); |
| 3675 | } |
| 3676 | |
| 3677 | // Materialize the value in the heap. |
| 3678 | return AllocateHeapNumber(value, pretenure); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3679 | } |
| 3680 | |
| 3681 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 3682 | MaybeObject* Heap::AllocateForeign(Address address, PretenureFlag pretenure) { |
| 3683 | // Statically ensure that it is safe to allocate foreigns in paged spaces. |
yangguo@chromium.org | ab30bb8 | 2012-02-24 14:41:46 +0000 | [diff] [blame] | 3684 | STATIC_ASSERT(Foreign::kSize <= Page::kMaxNonCodeHeapObjectSize); |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 3685 | AllocationSpace space = (pretenure == TENURED) ? OLD_DATA_SPACE : NEW_SPACE; |
jkummerow@chromium.org | c3b3712 | 2011-11-07 10:14:12 +0000 | [diff] [blame] | 3686 | Foreign* result; |
| 3687 | MaybeObject* maybe_result = Allocate(foreign_map(), space); |
| 3688 | if (!maybe_result->To(&result)) return maybe_result; |
| 3689 | result->set_foreign_address(address); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3690 | return result; |
| 3691 | } |
| 3692 | |
| 3693 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3694 | MaybeObject* Heap::AllocateSharedFunctionInfo(Object* name) { |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 3695 | SharedFunctionInfo* share; |
| 3696 | MaybeObject* maybe = Allocate(shared_function_info_map(), OLD_POINTER_SPACE); |
| 3697 | if (!maybe->To<SharedFunctionInfo>(&share)) return maybe; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3698 | |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 3699 | // Set pointer fields. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3700 | share->set_name(name); |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 3701 | Code* illegal = isolate_->builtins()->builtin(Builtins::kIllegal); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3702 | share->set_code(illegal); |
ulan@chromium.org | 906e2fb | 2013-05-14 08:14:38 +0000 | [diff] [blame] | 3703 | share->set_optimized_code_map(Smi::FromInt(0)); |
hpayer@chromium.org | 8432c91 | 2013-02-28 15:55:26 +0000 | [diff] [blame] | 3704 | share->set_scope_info(ScopeInfo::Empty(isolate_)); |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 3705 | Code* construct_stub = |
| 3706 | isolate_->builtins()->builtin(Builtins::kJSConstructStubGeneric); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 3707 | share->set_construct_stub(construct_stub); |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3708 | share->set_instance_class_name(Object_string()); |
ricow@chromium.org | 27bf288 | 2011-11-17 08:34:43 +0000 | [diff] [blame] | 3709 | share->set_function_data(undefined_value(), SKIP_WRITE_BARRIER); |
| 3710 | share->set_script(undefined_value(), SKIP_WRITE_BARRIER); |
| 3711 | share->set_debug_info(undefined_value(), SKIP_WRITE_BARRIER); |
| 3712 | share->set_inferred_name(empty_string(), SKIP_WRITE_BARRIER); |
| 3713 | share->set_initial_map(undefined_value(), SKIP_WRITE_BARRIER); |
svenpanne@chromium.org | b1df11d | 2012-02-08 10:26:21 +0000 | [diff] [blame] | 3714 | share->set_ast_node_count(0); |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 3715 | share->set_counters(0); |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 3716 | |
| 3717 | // Set integer fields (smi or int, depending on the architecture). |
| 3718 | share->set_length(0); |
| 3719 | share->set_formal_parameter_count(0); |
| 3720 | share->set_expected_nof_properties(0); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3721 | share->set_num_literals(0); |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 3722 | share->set_start_position_and_type(0); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3723 | share->set_end_position(0); |
| 3724 | share->set_function_token_position(0); |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 3725 | // All compiler hints default to false or 0. |
| 3726 | share->set_compiler_hints(0); |
jkummerow@chromium.org | 2c9426b | 2013-09-05 16:31:13 +0000 | [diff] [blame] | 3727 | share->set_opt_count_and_bailout_reason(0); |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 3728 | |
| 3729 | return share; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3730 | } |
| 3731 | |
| 3732 | |
kmillikin@chromium.org | 31b1277 | 2011-02-02 16:08:26 +0000 | [diff] [blame] | 3733 | MaybeObject* Heap::AllocateJSMessageObject(String* type, |
| 3734 | JSArray* arguments, |
| 3735 | int start_position, |
| 3736 | int end_position, |
| 3737 | Object* script, |
| 3738 | Object* stack_trace, |
| 3739 | Object* stack_frames) { |
| 3740 | Object* result; |
| 3741 | { MaybeObject* maybe_result = Allocate(message_object_map(), NEW_SPACE); |
| 3742 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 3743 | } |
| 3744 | JSMessageObject* message = JSMessageObject::cast(result); |
ricow@chromium.org | 27bf288 | 2011-11-17 08:34:43 +0000 | [diff] [blame] | 3745 | message->set_properties(Heap::empty_fixed_array(), SKIP_WRITE_BARRIER); |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 3746 | message->initialize_elements(); |
ricow@chromium.org | 27bf288 | 2011-11-17 08:34:43 +0000 | [diff] [blame] | 3747 | message->set_elements(Heap::empty_fixed_array(), SKIP_WRITE_BARRIER); |
kmillikin@chromium.org | 31b1277 | 2011-02-02 16:08:26 +0000 | [diff] [blame] | 3748 | message->set_type(type); |
| 3749 | message->set_arguments(arguments); |
| 3750 | message->set_start_position(start_position); |
| 3751 | message->set_end_position(end_position); |
| 3752 | message->set_script(script); |
| 3753 | message->set_stack_trace(stack_trace); |
| 3754 | message->set_stack_frames(stack_frames); |
| 3755 | return result; |
| 3756 | } |
| 3757 | |
| 3758 | |
| 3759 | |
ager@chromium.org | 6141cbe | 2009-11-20 12:14:52 +0000 | [diff] [blame] | 3760 | // Returns true for a character in a range. Both limits are inclusive. |
| 3761 | static inline bool Between(uint32_t character, uint32_t from, uint32_t to) { |
| 3762 | // This makes uses of the the unsigned wraparound. |
| 3763 | return character - from <= to - from; |
| 3764 | } |
| 3765 | |
| 3766 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3767 | MUST_USE_RESULT static inline MaybeObject* MakeOrFindTwoCharacterString( |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3768 | Heap* heap, |
yangguo@chromium.org | a6bbcc8 | 2012-12-21 12:35:02 +0000 | [diff] [blame] | 3769 | uint16_t c1, |
| 3770 | uint16_t c2) { |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3771 | String* result; |
ager@chromium.org | 6141cbe | 2009-11-20 12:14:52 +0000 | [diff] [blame] | 3772 | // Numeric strings have a different hash algorithm not known by |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3773 | // LookupTwoCharsStringIfExists, so we skip this step for such strings. |
ager@chromium.org | 6141cbe | 2009-11-20 12:14:52 +0000 | [diff] [blame] | 3774 | if ((!Between(c1, '0', '9') || !Between(c2, '0', '9')) && |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3775 | heap->string_table()->LookupTwoCharsStringIfExists(c1, c2, &result)) { |
| 3776 | return result; |
ager@chromium.org | 6141cbe | 2009-11-20 12:14:52 +0000 | [diff] [blame] | 3777 | // Now we know the length is 2, we might as well make use of that fact |
| 3778 | // when building the new string. |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 3779 | } else if (static_cast<unsigned>(c1 | c2) <= String::kMaxOneByteCharCodeU) { |
yangguo@chromium.org | a6bbcc8 | 2012-12-21 12:35:02 +0000 | [diff] [blame] | 3780 | // We can do this. |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 3781 | ASSERT(IsPowerOf2(String::kMaxOneByteCharCodeU + 1)); // because of this. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3782 | Object* result; |
ulan@chromium.org | 8e8d882 | 2012-11-23 14:36:46 +0000 | [diff] [blame] | 3783 | { MaybeObject* maybe_result = heap->AllocateRawOneByteString(2); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3784 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 3785 | } |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 3786 | uint8_t* dest = SeqOneByteString::cast(result)->GetChars(); |
| 3787 | dest[0] = static_cast<uint8_t>(c1); |
| 3788 | dest[1] = static_cast<uint8_t>(c2); |
ager@chromium.org | 6141cbe | 2009-11-20 12:14:52 +0000 | [diff] [blame] | 3789 | return result; |
| 3790 | } else { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3791 | Object* result; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3792 | { MaybeObject* maybe_result = heap->AllocateRawTwoByteString(2); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3793 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 3794 | } |
ager@chromium.org | 6141cbe | 2009-11-20 12:14:52 +0000 | [diff] [blame] | 3795 | uc16* dest = SeqTwoByteString::cast(result)->GetChars(); |
| 3796 | dest[0] = c1; |
| 3797 | dest[1] = c2; |
| 3798 | return result; |
| 3799 | } |
| 3800 | } |
| 3801 | |
| 3802 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3803 | MaybeObject* Heap::AllocateConsString(String* first, String* second) { |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 3804 | int first_length = first->length(); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 3805 | if (first_length == 0) { |
| 3806 | return second; |
| 3807 | } |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 3808 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 3809 | int second_length = second->length(); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 3810 | if (second_length == 0) { |
| 3811 | return first; |
| 3812 | } |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 3813 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 3814 | int length = first_length + second_length; |
ager@chromium.org | 6141cbe | 2009-11-20 12:14:52 +0000 | [diff] [blame] | 3815 | |
| 3816 | // Optimization for 2-byte strings often used as keys in a decompression |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3817 | // dictionary. Check whether we already have the string in the string |
ager@chromium.org | 6141cbe | 2009-11-20 12:14:52 +0000 | [diff] [blame] | 3818 | // table to prevent creation of many unneccesary strings. |
| 3819 | if (length == 2) { |
yangguo@chromium.org | a6bbcc8 | 2012-12-21 12:35:02 +0000 | [diff] [blame] | 3820 | uint16_t c1 = first->Get(0); |
| 3821 | uint16_t c2 = second->Get(0); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3822 | return MakeOrFindTwoCharacterString(this, c1, c2); |
ager@chromium.org | 6141cbe | 2009-11-20 12:14:52 +0000 | [diff] [blame] | 3823 | } |
| 3824 | |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 3825 | bool first_is_one_byte = first->IsOneByteRepresentation(); |
| 3826 | bool second_is_one_byte = second->IsOneByteRepresentation(); |
| 3827 | bool is_one_byte = first_is_one_byte && second_is_one_byte; |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 3828 | // Make sure that an out of memory exception is thrown if the length |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 3829 | // of the new cons string is too large. |
| 3830 | if (length > String::kMaxLength || length < 0) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3831 | isolate()->context()->mark_out_of_memory(); |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 3832 | return Failure::OutOfMemoryException(0x4); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 3833 | } |
| 3834 | |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 3835 | bool is_one_byte_data_in_two_byte_string = false; |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 3836 | if (!is_one_byte) { |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 3837 | // At least one of the strings uses two-byte representation so we |
ulan@chromium.org | 2efb900 | 2012-01-19 15:36:35 +0000 | [diff] [blame] | 3838 | // can't use the fast case code for short ASCII strings below, but |
| 3839 | // we can try to save memory if all chars actually fit in ASCII. |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 3840 | is_one_byte_data_in_two_byte_string = |
| 3841 | first->HasOnlyOneByteChars() && second->HasOnlyOneByteChars(); |
| 3842 | if (is_one_byte_data_in_two_byte_string) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3843 | isolate_->counters()->string_add_runtime_ext_to_ascii()->Increment(); |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 3844 | } |
| 3845 | } |
| 3846 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3847 | // If the resulting string is small make a flat string. |
ulan@chromium.org | 2efb900 | 2012-01-19 15:36:35 +0000 | [diff] [blame] | 3848 | if (length < ConsString::kMinLength) { |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 3849 | // Note that neither of the two inputs can be a slice because: |
ulan@chromium.org | 2efb900 | 2012-01-19 15:36:35 +0000 | [diff] [blame] | 3850 | STATIC_ASSERT(ConsString::kMinLength <= SlicedString::kMinLength); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 3851 | ASSERT(first->IsFlat()); |
| 3852 | ASSERT(second->IsFlat()); |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 3853 | if (is_one_byte) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3854 | Object* result; |
ulan@chromium.org | 8e8d882 | 2012-11-23 14:36:46 +0000 | [diff] [blame] | 3855 | { MaybeObject* maybe_result = AllocateRawOneByteString(length); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3856 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 3857 | } |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 3858 | // Copy the characters into the new object. |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 3859 | uint8_t* dest = SeqOneByteString::cast(result)->GetChars(); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 3860 | // Copy first part. |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 3861 | const uint8_t* src; |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 3862 | if (first->IsExternalString()) { |
erikcorry | 0ad885c | 2011-11-21 13:51:57 +0000 | [diff] [blame] | 3863 | src = ExternalAsciiString::cast(first)->GetChars(); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 3864 | } else { |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 3865 | src = SeqOneByteString::cast(first)->GetChars(); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 3866 | } |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 3867 | for (int i = 0; i < first_length; i++) *dest++ = src[i]; |
| 3868 | // Copy second part. |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 3869 | if (second->IsExternalString()) { |
erikcorry | 0ad885c | 2011-11-21 13:51:57 +0000 | [diff] [blame] | 3870 | src = ExternalAsciiString::cast(second)->GetChars(); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 3871 | } else { |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 3872 | src = SeqOneByteString::cast(second)->GetChars(); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 3873 | } |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 3874 | for (int i = 0; i < second_length; i++) *dest++ = src[i]; |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 3875 | return result; |
| 3876 | } else { |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 3877 | if (is_one_byte_data_in_two_byte_string) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3878 | Object* result; |
ulan@chromium.org | 8e8d882 | 2012-11-23 14:36:46 +0000 | [diff] [blame] | 3879 | { MaybeObject* maybe_result = AllocateRawOneByteString(length); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3880 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 3881 | } |
ricow@chromium.org | aa1b616 | 2010-03-29 07:44:58 +0000 | [diff] [blame] | 3882 | // Copy the characters into the new object. |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 3883 | uint8_t* dest = SeqOneByteString::cast(result)->GetChars(); |
ricow@chromium.org | aa1b616 | 2010-03-29 07:44:58 +0000 | [diff] [blame] | 3884 | String::WriteToFlat(first, dest, 0, first_length); |
| 3885 | String::WriteToFlat(second, dest + first_length, 0, second_length); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3886 | isolate_->counters()->string_add_runtime_ext_to_ascii()->Increment(); |
ricow@chromium.org | aa1b616 | 2010-03-29 07:44:58 +0000 | [diff] [blame] | 3887 | return result; |
| 3888 | } |
| 3889 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3890 | Object* result; |
| 3891 | { MaybeObject* maybe_result = AllocateRawTwoByteString(length); |
| 3892 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 3893 | } |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 3894 | // Copy the characters into the new object. |
| 3895 | uc16* dest = SeqTwoByteString::cast(result)->GetChars(); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 3896 | String::WriteToFlat(first, dest, 0, first_length); |
| 3897 | String::WriteToFlat(second, dest + first_length, 0, second_length); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 3898 | return result; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3899 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3900 | } |
| 3901 | |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 3902 | Map* map = (is_one_byte || is_one_byte_data_in_two_byte_string) ? |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 3903 | cons_ascii_string_map() : cons_string_map(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3904 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3905 | Object* result; |
| 3906 | { MaybeObject* maybe_result = Allocate(map, NEW_SPACE); |
| 3907 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 3908 | } |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3909 | |
rossberg@chromium.org | 79e7902 | 2013-06-03 15:43:46 +0000 | [diff] [blame] | 3910 | DisallowHeapAllocation no_gc; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3911 | ConsString* cons_string = ConsString::cast(result); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3912 | WriteBarrierMode mode = cons_string->GetWriteBarrierMode(no_gc); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 3913 | cons_string->set_length(length); |
| 3914 | cons_string->set_hash_field(String::kEmptyHashField); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 3915 | cons_string->set_first(first, mode); |
| 3916 | cons_string->set_second(second, mode); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3917 | return result; |
| 3918 | } |
| 3919 | |
| 3920 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3921 | MaybeObject* Heap::AllocateSubString(String* buffer, |
ager@chromium.org | 04921a8 | 2011-06-27 13:21:41 +0000 | [diff] [blame] | 3922 | int start, |
| 3923 | int end, |
| 3924 | PretenureFlag pretenure) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3925 | int length = end - start; |
ulan@chromium.org | 2efb900 | 2012-01-19 15:36:35 +0000 | [diff] [blame] | 3926 | if (length <= 0) { |
ager@chromium.org | 04921a8 | 2011-06-27 13:21:41 +0000 | [diff] [blame] | 3927 | return empty_string(); |
| 3928 | } else if (length == 1) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3929 | return LookupSingleCharacterStringFromCode(buffer->Get(start)); |
ager@chromium.org | 6141cbe | 2009-11-20 12:14:52 +0000 | [diff] [blame] | 3930 | } else if (length == 2) { |
| 3931 | // Optimization for 2-byte strings often used as keys in a decompression |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3932 | // dictionary. Check whether we already have the string in the string |
| 3933 | // table to prevent creation of many unnecessary strings. |
yangguo@chromium.org | a6bbcc8 | 2012-12-21 12:35:02 +0000 | [diff] [blame] | 3934 | uint16_t c1 = buffer->Get(start); |
| 3935 | uint16_t c2 = buffer->Get(start + 1); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3936 | return MakeOrFindTwoCharacterString(this, c1, c2); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3937 | } |
| 3938 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3939 | // Make an attempt to flatten the buffer to reduce access time. |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 3940 | buffer = buffer->TryFlattenGetString(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3941 | |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 3942 | if (!FLAG_string_slices || |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 3943 | !buffer->IsFlat() || |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 3944 | length < SlicedString::kMinLength || |
| 3945 | pretenure == TENURED) { |
| 3946 | Object* result; |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 3947 | // WriteToFlat takes care of the case when an indirect string has a |
| 3948 | // different encoding from its underlying string. These encodings may |
| 3949 | // differ because of externalization. |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 3950 | bool is_one_byte = buffer->IsOneByteRepresentation(); |
| 3951 | { MaybeObject* maybe_result = is_one_byte |
ulan@chromium.org | 8e8d882 | 2012-11-23 14:36:46 +0000 | [diff] [blame] | 3952 | ? AllocateRawOneByteString(length, pretenure) |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 3953 | : AllocateRawTwoByteString(length, pretenure); |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 3954 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 3955 | } |
| 3956 | String* string_result = String::cast(result); |
| 3957 | // Copy the characters into the new object. |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 3958 | if (is_one_byte) { |
ulan@chromium.org | 8e8d882 | 2012-11-23 14:36:46 +0000 | [diff] [blame] | 3959 | ASSERT(string_result->IsOneByteRepresentation()); |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 3960 | uint8_t* dest = SeqOneByteString::cast(string_result)->GetChars(); |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 3961 | String::WriteToFlat(buffer, dest, start, end); |
| 3962 | } else { |
| 3963 | ASSERT(string_result->IsTwoByteRepresentation()); |
| 3964 | uc16* dest = SeqTwoByteString::cast(string_result)->GetChars(); |
| 3965 | String::WriteToFlat(buffer, dest, start, end); |
| 3966 | } |
| 3967 | return result; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3968 | } |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 3969 | |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 3970 | ASSERT(buffer->IsFlat()); |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 3971 | #if VERIFY_HEAP |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 3972 | if (FLAG_verify_heap) { |
| 3973 | buffer->StringVerify(); |
| 3974 | } |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 3975 | #endif |
| 3976 | |
| 3977 | Object* result; |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 3978 | // When slicing an indirect string we use its encoding for a newly created |
| 3979 | // slice and don't check the encoding of the underlying string. This is safe |
| 3980 | // even if the encodings are different because of externalization. If an |
| 3981 | // indirect ASCII string is pointing to a two-byte string, the two-byte char |
| 3982 | // codes of the underlying string must still fit into ASCII (because |
| 3983 | // externalization must not change char codes). |
ulan@chromium.org | 8e8d882 | 2012-11-23 14:36:46 +0000 | [diff] [blame] | 3984 | { Map* map = buffer->IsOneByteRepresentation() |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 3985 | ? sliced_ascii_string_map() |
| 3986 | : sliced_string_map(); |
| 3987 | MaybeObject* maybe_result = Allocate(map, NEW_SPACE); |
| 3988 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 3989 | } |
| 3990 | |
rossberg@chromium.org | 79e7902 | 2013-06-03 15:43:46 +0000 | [diff] [blame] | 3991 | DisallowHeapAllocation no_gc; |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 3992 | SlicedString* sliced_string = SlicedString::cast(result); |
| 3993 | sliced_string->set_length(length); |
| 3994 | sliced_string->set_hash_field(String::kEmptyHashField); |
| 3995 | if (buffer->IsConsString()) { |
| 3996 | ConsString* cons = ConsString::cast(buffer); |
| 3997 | ASSERT(cons->second()->length() == 0); |
| 3998 | sliced_string->set_parent(cons->first()); |
| 3999 | sliced_string->set_offset(start); |
| 4000 | } else if (buffer->IsSlicedString()) { |
| 4001 | // Prevent nesting sliced strings. |
| 4002 | SlicedString* parent_slice = SlicedString::cast(buffer); |
| 4003 | sliced_string->set_parent(parent_slice->parent()); |
| 4004 | sliced_string->set_offset(start + parent_slice->offset()); |
| 4005 | } else { |
| 4006 | sliced_string->set_parent(buffer); |
| 4007 | sliced_string->set_offset(start); |
| 4008 | } |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 4009 | ASSERT(sliced_string->parent()->IsSeqString() || |
| 4010 | sliced_string->parent()->IsExternalString()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4011 | return result; |
| 4012 | } |
| 4013 | |
| 4014 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4015 | MaybeObject* Heap::AllocateExternalStringFromAscii( |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 4016 | const ExternalAsciiString::Resource* resource) { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 4017 | size_t length = resource->length(); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 4018 | if (length > static_cast<size_t>(String::kMaxLength)) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 4019 | isolate()->context()->mark_out_of_memory(); |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 4020 | return Failure::OutOfMemoryException(0x5); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4021 | } |
| 4022 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 4023 | Map* map = external_ascii_string_map(); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4024 | Object* result; |
| 4025 | { MaybeObject* maybe_result = Allocate(map, NEW_SPACE); |
| 4026 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 4027 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4028 | |
| 4029 | ExternalAsciiString* external_string = ExternalAsciiString::cast(result); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 4030 | external_string->set_length(static_cast<int>(length)); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 4031 | external_string->set_hash_field(String::kEmptyHashField); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4032 | external_string->set_resource(resource); |
| 4033 | |
| 4034 | return result; |
| 4035 | } |
| 4036 | |
| 4037 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4038 | MaybeObject* Heap::AllocateExternalStringFromTwoByte( |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 4039 | const ExternalTwoByteString::Resource* resource) { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 4040 | size_t length = resource->length(); |
| 4041 | if (length > static_cast<size_t>(String::kMaxLength)) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 4042 | isolate()->context()->mark_out_of_memory(); |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 4043 | return Failure::OutOfMemoryException(0x6); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 4044 | } |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 4045 | |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 4046 | // For small strings we check whether the resource contains only |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 4047 | // one byte characters. If yes, we use a different string map. |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 4048 | static const size_t kOneByteCheckLengthLimit = 32; |
| 4049 | bool is_one_byte = length <= kOneByteCheckLengthLimit && |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 4050 | String::IsOneByte(resource->data(), static_cast<int>(length)); |
| 4051 | Map* map = is_one_byte ? |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 4052 | external_string_with_one_byte_data_map() : external_string_map(); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4053 | Object* result; |
| 4054 | { MaybeObject* maybe_result = Allocate(map, NEW_SPACE); |
| 4055 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 4056 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4057 | |
| 4058 | ExternalTwoByteString* external_string = ExternalTwoByteString::cast(result); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 4059 | external_string->set_length(static_cast<int>(length)); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 4060 | external_string->set_hash_field(String::kEmptyHashField); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4061 | external_string->set_resource(resource); |
| 4062 | |
| 4063 | return result; |
| 4064 | } |
| 4065 | |
| 4066 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4067 | MaybeObject* Heap::LookupSingleCharacterStringFromCode(uint16_t code) { |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 4068 | if (code <= String::kMaxOneByteCharCode) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 4069 | Object* value = single_character_string_cache()->get(code); |
| 4070 | if (value != undefined_value()) return value; |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 4071 | |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 4072 | uint8_t buffer[1]; |
| 4073 | buffer[0] = static_cast<uint8_t>(code); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4074 | Object* result; |
yangguo@chromium.org | a6bbcc8 | 2012-12-21 12:35:02 +0000 | [diff] [blame] | 4075 | MaybeObject* maybe_result = |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4076 | InternalizeOneByteString(Vector<const uint8_t>(buffer, 1)); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 4077 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4078 | if (!maybe_result->ToObject(&result)) return maybe_result; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 4079 | single_character_string_cache()->set(code, result); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4080 | return result; |
| 4081 | } |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 4082 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4083 | Object* result; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 4084 | { MaybeObject* maybe_result = AllocateRawTwoByteString(1); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4085 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 4086 | } |
ager@chromium.org | 870a0b6 | 2008-11-04 11:43:05 +0000 | [diff] [blame] | 4087 | String* answer = String::cast(result); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 4088 | answer->Set(0, code); |
ager@chromium.org | 870a0b6 | 2008-11-04 11:43:05 +0000 | [diff] [blame] | 4089 | return answer; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4090 | } |
| 4091 | |
| 4092 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4093 | MaybeObject* Heap::AllocateByteArray(int length, PretenureFlag pretenure) { |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 4094 | if (length < 0 || length > ByteArray::kMaxLength) { |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 4095 | return Failure::OutOfMemoryException(0x7); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 4096 | } |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 4097 | int size = ByteArray::SizeFor(length); |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 4098 | AllocationSpace space = SelectSpace(size, OLD_DATA_SPACE, pretenure); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4099 | Object* result; |
| 4100 | { MaybeObject* maybe_result = AllocateRaw(size, space, OLD_DATA_SPACE); |
| 4101 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 4102 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4103 | |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 4104 | reinterpret_cast<ByteArray*>(result)->set_map_no_write_barrier( |
| 4105 | byte_array_map()); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4106 | reinterpret_cast<ByteArray*>(result)->set_length(length); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4107 | return result; |
| 4108 | } |
| 4109 | |
| 4110 | |
ager@chromium.org | 6f10e41 | 2009-02-13 10:11:16 +0000 | [diff] [blame] | 4111 | void Heap::CreateFillerObjectAt(Address addr, int size) { |
| 4112 | if (size == 0) return; |
| 4113 | HeapObject* filler = HeapObject::FromAddress(addr); |
| 4114 | if (size == kPointerSize) { |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 4115 | filler->set_map_no_write_barrier(one_pointer_filler_map()); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 4116 | } else if (size == 2 * kPointerSize) { |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 4117 | filler->set_map_no_write_barrier(two_pointer_filler_map()); |
ager@chromium.org | 6f10e41 | 2009-02-13 10:11:16 +0000 | [diff] [blame] | 4118 | } else { |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 4119 | filler->set_map_no_write_barrier(free_space_map()); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 4120 | FreeSpace::cast(filler)->set_size(size); |
ager@chromium.org | 6f10e41 | 2009-02-13 10:11:16 +0000 | [diff] [blame] | 4121 | } |
| 4122 | } |
| 4123 | |
| 4124 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4125 | MaybeObject* Heap::AllocateExternalArray(int length, |
| 4126 | ExternalArrayType array_type, |
| 4127 | void* external_pointer, |
| 4128 | PretenureFlag pretenure) { |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 4129 | int size = ExternalArray::kAlignedSize; |
| 4130 | AllocationSpace space = SelectSpace(size, OLD_DATA_SPACE, pretenure); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4131 | Object* result; |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 4132 | { MaybeObject* maybe_result = AllocateRaw(size, space, OLD_DATA_SPACE); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4133 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 4134 | } |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 4135 | |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 4136 | reinterpret_cast<ExternalArray*>(result)->set_map_no_write_barrier( |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 4137 | MapForExternalArrayType(array_type)); |
| 4138 | reinterpret_cast<ExternalArray*>(result)->set_length(length); |
| 4139 | reinterpret_cast<ExternalArray*>(result)->set_external_pointer( |
| 4140 | external_pointer); |
| 4141 | |
| 4142 | return result; |
| 4143 | } |
| 4144 | |
| 4145 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4146 | MaybeObject* Heap::CreateCode(const CodeDesc& desc, |
| 4147 | Code::Flags flags, |
danno@chromium.org | 4d3fe4e | 2011-03-10 10:14:28 +0000 | [diff] [blame] | 4148 | Handle<Object> self_reference, |
mstarzinger@chromium.org | b228be0 | 2013-04-18 14:56:59 +0000 | [diff] [blame] | 4149 | bool immovable, |
bmeurer@chromium.org | c9913f0 | 2013-10-24 06:31:36 +0000 | [diff] [blame] | 4150 | bool crankshafted, |
| 4151 | int prologue_offset) { |
erik.corry@gmail.com | 4a2e25e | 2010-07-07 12:22:46 +0000 | [diff] [blame] | 4152 | // Allocate ByteArray before the Code object, so that we do not risk |
| 4153 | // leaving uninitialized Code object (and breaking the heap). |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 4154 | ByteArray* reloc_info; |
| 4155 | MaybeObject* maybe_reloc_info = AllocateByteArray(desc.reloc_size, TENURED); |
| 4156 | if (!maybe_reloc_info->To(&reloc_info)) return maybe_reloc_info; |
erik.corry@gmail.com | 4a2e25e | 2010-07-07 12:22:46 +0000 | [diff] [blame] | 4157 | |
danno@chromium.org | 4d3fe4e | 2011-03-10 10:14:28 +0000 | [diff] [blame] | 4158 | // Compute size. |
erik.corry@gmail.com | 4a2e25e | 2010-07-07 12:22:46 +0000 | [diff] [blame] | 4159 | int body_size = RoundUp(desc.instr_size, kObjectAlignment); |
ager@chromium.org | 6a2b0aa | 2010-07-13 20:58:03 +0000 | [diff] [blame] | 4160 | int obj_size = Code::SizeFor(body_size); |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 4161 | ASSERT(IsAligned(static_cast<intptr_t>(obj_size), kCodeAlignment)); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4162 | MaybeObject* maybe_result; |
danno@chromium.org | 4d3fe4e | 2011-03-10 10:14:28 +0000 | [diff] [blame] | 4163 | // Large code objects and code objects which should stay at a fixed address |
| 4164 | // are allocated in large object space. |
ulan@chromium.org | 56c14af | 2012-09-20 12:51:09 +0000 | [diff] [blame] | 4165 | HeapObject* result; |
| 4166 | bool force_lo_space = obj_size > code_space()->AreaSize(); |
| 4167 | if (force_lo_space) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 4168 | maybe_result = lo_space_->AllocateRaw(obj_size, EXECUTABLE); |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 4169 | } else { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4170 | maybe_result = code_space_->AllocateRaw(obj_size); |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 4171 | } |
ulan@chromium.org | 56c14af | 2012-09-20 12:51:09 +0000 | [diff] [blame] | 4172 | if (!maybe_result->To<HeapObject>(&result)) return maybe_result; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4173 | |
ulan@chromium.org | 56c14af | 2012-09-20 12:51:09 +0000 | [diff] [blame] | 4174 | if (immovable && !force_lo_space && |
| 4175 | // Objects on the first page of each space are never moved. |
| 4176 | !code_space_->FirstPage()->Contains(result->address())) { |
| 4177 | // Discard the first code allocation, which was on a page where it could be |
| 4178 | // moved. |
| 4179 | CreateFillerObjectAt(result->address(), obj_size); |
| 4180 | maybe_result = lo_space_->AllocateRaw(obj_size, EXECUTABLE); |
| 4181 | if (!maybe_result->To<HeapObject>(&result)) return maybe_result; |
| 4182 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4183 | |
| 4184 | // Initialize the object |
ulan@chromium.org | 56c14af | 2012-09-20 12:51:09 +0000 | [diff] [blame] | 4185 | result->set_map_no_write_barrier(code_map()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4186 | Code* code = Code::cast(result); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 4187 | ASSERT(!isolate_->code_range()->exists() || |
| 4188 | isolate_->code_range()->contains(code->address())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4189 | code->set_instruction_size(desc.instr_size); |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 4190 | code->set_relocation_info(reloc_info); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4191 | code->set_flags(flags); |
sgjesse@chromium.org | c6c5718 | 2011-01-17 12:24:25 +0000 | [diff] [blame] | 4192 | if (code->is_call_stub() || code->is_keyed_call_stub()) { |
| 4193 | code->set_check_type(RECEIVER_MAP_CHECK); |
| 4194 | } |
mstarzinger@chromium.org | b228be0 | 2013-04-18 14:56:59 +0000 | [diff] [blame] | 4195 | code->set_is_crankshafted(crankshafted); |
ricow@chromium.org | 27bf288 | 2011-11-17 08:34:43 +0000 | [diff] [blame] | 4196 | code->set_deoptimization_data(empty_fixed_array(), SKIP_WRITE_BARRIER); |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 4197 | code->InitializeTypeFeedbackInfoNoWriteBarrier(undefined_value()); |
ricow@chromium.org | 27bf288 | 2011-11-17 08:34:43 +0000 | [diff] [blame] | 4198 | code->set_handler_table(empty_fixed_array(), SKIP_WRITE_BARRIER); |
yangguo@chromium.org | 659ceec | 2012-01-26 07:37:54 +0000 | [diff] [blame] | 4199 | code->set_gc_metadata(Smi::FromInt(0)); |
danno@chromium.org | 88aa058 | 2012-03-23 15:11:57 +0000 | [diff] [blame] | 4200 | code->set_ic_age(global_ic_age_); |
bmeurer@chromium.org | c9913f0 | 2013-10-24 06:31:36 +0000 | [diff] [blame] | 4201 | code->set_prologue_offset(prologue_offset); |
yangguo@chromium.org | 003650e | 2013-01-24 16:31:08 +0000 | [diff] [blame] | 4202 | if (code->kind() == Code::OPTIMIZED_FUNCTION) { |
| 4203 | code->set_marked_for_deoptimization(false); |
| 4204 | } |
bmeurer@chromium.org | c9913f0 | 2013-10-24 06:31:36 +0000 | [diff] [blame] | 4205 | |
| 4206 | #ifdef ENABLE_DEBUGGER_SUPPORT |
| 4207 | if (code->kind() == Code::FUNCTION) { |
| 4208 | code->set_has_debug_break_slots( |
| 4209 | isolate_->debugger()->IsDebuggerActive()); |
| 4210 | } |
| 4211 | #endif |
| 4212 | |
kasperl@chromium.org | 061ef74 | 2009-02-27 12:16:20 +0000 | [diff] [blame] | 4213 | // Allow self references to created code object by patching the handle to |
| 4214 | // point to the newly allocated Code object. |
| 4215 | if (!self_reference.is_null()) { |
| 4216 | *(self_reference.location()) = code; |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 4217 | } |
| 4218 | // Migrate generated code. |
| 4219 | // The generated code can contain Object** values (typically from handles) |
| 4220 | // that are dereferenced during the copy to point directly to the actual heap |
| 4221 | // objects. These pointers can include references to the code object itself, |
| 4222 | // through the self_reference parameter. |
| 4223 | code->CopyFrom(desc); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4224 | |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 4225 | #ifdef VERIFY_HEAP |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 4226 | if (FLAG_verify_heap) { |
| 4227 | code->Verify(); |
| 4228 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4229 | #endif |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4230 | return code; |
| 4231 | } |
| 4232 | |
| 4233 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4234 | MaybeObject* Heap::CopyCode(Code* code) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4235 | // Allocate an object the same size as the code object. |
| 4236 | int obj_size = code->Size(); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4237 | MaybeObject* maybe_result; |
yangguo@chromium.org | ab30bb8 | 2012-02-24 14:41:46 +0000 | [diff] [blame] | 4238 | if (obj_size > code_space()->AreaSize()) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 4239 | maybe_result = lo_space_->AllocateRaw(obj_size, EXECUTABLE); |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 4240 | } else { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4241 | maybe_result = code_space_->AllocateRaw(obj_size); |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 4242 | } |
| 4243 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4244 | Object* result; |
| 4245 | if (!maybe_result->ToObject(&result)) return maybe_result; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4246 | |
| 4247 | // Copy code object. |
| 4248 | Address old_addr = code->address(); |
| 4249 | Address new_addr = reinterpret_cast<HeapObject*>(result)->address(); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4250 | CopyBlock(new_addr, old_addr, obj_size); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4251 | // Relocate the copy. |
| 4252 | Code* new_code = Code::cast(result); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 4253 | ASSERT(!isolate_->code_range()->exists() || |
| 4254 | isolate_->code_range()->contains(code->address())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4255 | new_code->Relocate(new_addr - old_addr); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4256 | return new_code; |
| 4257 | } |
| 4258 | |
| 4259 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4260 | MaybeObject* Heap::CopyCode(Code* code, Vector<byte> reloc_info) { |
erik.corry@gmail.com | 4a2e25e | 2010-07-07 12:22:46 +0000 | [diff] [blame] | 4261 | // Allocate ByteArray before the Code object, so that we do not risk |
| 4262 | // leaving uninitialized Code object (and breaking the heap). |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4263 | Object* reloc_info_array; |
| 4264 | { MaybeObject* maybe_reloc_info_array = |
| 4265 | AllocateByteArray(reloc_info.length(), TENURED); |
| 4266 | if (!maybe_reloc_info_array->ToObject(&reloc_info_array)) { |
| 4267 | return maybe_reloc_info_array; |
| 4268 | } |
| 4269 | } |
erik.corry@gmail.com | 4a2e25e | 2010-07-07 12:22:46 +0000 | [diff] [blame] | 4270 | |
| 4271 | int new_body_size = RoundUp(code->instruction_size(), kObjectAlignment); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 4272 | |
ager@chromium.org | 6a2b0aa | 2010-07-13 20:58:03 +0000 | [diff] [blame] | 4273 | int new_obj_size = Code::SizeFor(new_body_size); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 4274 | |
| 4275 | Address old_addr = code->address(); |
| 4276 | |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 4277 | size_t relocation_offset = |
erik.corry@gmail.com | 4a2e25e | 2010-07-07 12:22:46 +0000 | [diff] [blame] | 4278 | static_cast<size_t>(code->instruction_end() - old_addr); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 4279 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4280 | MaybeObject* maybe_result; |
yangguo@chromium.org | ab30bb8 | 2012-02-24 14:41:46 +0000 | [diff] [blame] | 4281 | if (new_obj_size > code_space()->AreaSize()) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 4282 | maybe_result = lo_space_->AllocateRaw(new_obj_size, EXECUTABLE); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 4283 | } else { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4284 | maybe_result = code_space_->AllocateRaw(new_obj_size); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 4285 | } |
| 4286 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4287 | Object* result; |
| 4288 | if (!maybe_result->ToObject(&result)) return maybe_result; |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 4289 | |
| 4290 | // Copy code object. |
| 4291 | Address new_addr = reinterpret_cast<HeapObject*>(result)->address(); |
| 4292 | |
| 4293 | // Copy header and instructions. |
mstarzinger@chromium.org | f705b50 | 2013-04-04 11:38:09 +0000 | [diff] [blame] | 4294 | CopyBytes(new_addr, old_addr, relocation_offset); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 4295 | |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 4296 | Code* new_code = Code::cast(result); |
erik.corry@gmail.com | 4a2e25e | 2010-07-07 12:22:46 +0000 | [diff] [blame] | 4297 | new_code->set_relocation_info(ByteArray::cast(reloc_info_array)); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 4298 | |
erik.corry@gmail.com | 4a2e25e | 2010-07-07 12:22:46 +0000 | [diff] [blame] | 4299 | // Copy patched rinfo. |
danno@chromium.org | c99cd48 | 2013-03-21 15:26:42 +0000 | [diff] [blame] | 4300 | CopyBytes(new_code->relocation_start(), |
| 4301 | reloc_info.start(), |
mstarzinger@chromium.org | f705b50 | 2013-04-04 11:38:09 +0000 | [diff] [blame] | 4302 | static_cast<size_t>(reloc_info.length())); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 4303 | |
| 4304 | // Relocate the copy. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 4305 | ASSERT(!isolate_->code_range()->exists() || |
| 4306 | isolate_->code_range()->contains(code->address())); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 4307 | new_code->Relocate(new_addr - old_addr); |
| 4308 | |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 4309 | #ifdef VERIFY_HEAP |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 4310 | if (FLAG_verify_heap) { |
| 4311 | code->Verify(); |
| 4312 | } |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 4313 | #endif |
| 4314 | return new_code; |
| 4315 | } |
| 4316 | |
| 4317 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4318 | MaybeObject* Heap::AllocateWithAllocationSite(Map* map, AllocationSpace space, |
danno@chromium.org | bee5199 | 2013-07-10 14:57:15 +0000 | [diff] [blame] | 4319 | Handle<AllocationSite> allocation_site) { |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4320 | ASSERT(gc_state_ == NOT_IN_GC); |
| 4321 | ASSERT(map->instance_type() != MAP_TYPE); |
| 4322 | // If allocation failures are disallowed, we may allocate in a different |
| 4323 | // space when new space is full and the object is not a large object. |
| 4324 | AllocationSpace retry_space = |
| 4325 | (space != NEW_SPACE) ? space : TargetSpaceId(map->instance_type()); |
jkummerow@chromium.org | ba72ec8 | 2013-07-22 09:21:20 +0000 | [diff] [blame] | 4326 | int size = map->instance_size() + AllocationMemento::kSize; |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4327 | Object* result; |
| 4328 | MaybeObject* maybe_result = AllocateRaw(size, space, retry_space); |
| 4329 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 4330 | // No need for write barrier since object is white and map is in old space. |
| 4331 | HeapObject::cast(result)->set_map_no_write_barrier(map); |
jkummerow@chromium.org | ba72ec8 | 2013-07-22 09:21:20 +0000 | [diff] [blame] | 4332 | AllocationMemento* alloc_memento = reinterpret_cast<AllocationMemento*>( |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4333 | reinterpret_cast<Address>(result) + map->instance_size()); |
jkummerow@chromium.org | ba72ec8 | 2013-07-22 09:21:20 +0000 | [diff] [blame] | 4334 | alloc_memento->set_map_no_write_barrier(allocation_memento_map()); |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 4335 | ASSERT(allocation_site->map() == allocation_site_map()); |
jkummerow@chromium.org | ba72ec8 | 2013-07-22 09:21:20 +0000 | [diff] [blame] | 4336 | alloc_memento->set_allocation_site(*allocation_site, SKIP_WRITE_BARRIER); |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4337 | return result; |
| 4338 | } |
| 4339 | |
| 4340 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4341 | MaybeObject* Heap::Allocate(Map* map, AllocationSpace space) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4342 | ASSERT(gc_state_ == NOT_IN_GC); |
| 4343 | ASSERT(map->instance_type() != MAP_TYPE); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 4344 | // If allocation failures are disallowed, we may allocate in a different |
| 4345 | // space when new space is full and the object is not a large object. |
| 4346 | AllocationSpace retry_space = |
| 4347 | (space != NEW_SPACE) ? space : TargetSpaceId(map->instance_type()); |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4348 | int size = map->instance_size(); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4349 | Object* result; |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4350 | MaybeObject* maybe_result = AllocateRaw(size, space, retry_space); |
| 4351 | if (!maybe_result->ToObject(&result)) return maybe_result; |
ricow@chromium.org | 27bf288 | 2011-11-17 08:34:43 +0000 | [diff] [blame] | 4352 | // No need for write barrier since object is white and map is in old space. |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 4353 | HeapObject::cast(result)->set_map_no_write_barrier(map); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4354 | return result; |
| 4355 | } |
| 4356 | |
| 4357 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 4358 | void Heap::InitializeFunction(JSFunction* function, |
| 4359 | SharedFunctionInfo* shared, |
| 4360 | Object* prototype) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4361 | ASSERT(!prototype->IsMap()); |
| 4362 | function->initialize_properties(); |
| 4363 | function->initialize_elements(); |
| 4364 | function->set_shared(shared); |
vegorov@chromium.org | 26c16f8 | 2010-08-11 13:41:03 +0000 | [diff] [blame] | 4365 | function->set_code(shared->code()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4366 | function->set_prototype_or_initial_map(prototype); |
| 4367 | function->set_context(undefined_value()); |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 4368 | function->set_literals_or_bindings(empty_fixed_array()); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 4369 | function->set_next_function_link(undefined_value()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4370 | } |
| 4371 | |
| 4372 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4373 | MaybeObject* Heap::AllocateFunctionPrototype(JSFunction* function) { |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 4374 | // Make sure to use globals from the function's context, since the function |
| 4375 | // can be from a different context. |
| 4376 | Context* native_context = function->context()->native_context(); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 4377 | Map* new_map; |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 4378 | if (function->shared()->is_generator()) { |
| 4379 | // Generator prototypes can share maps since they don't have "constructor" |
| 4380 | // properties. |
| 4381 | new_map = native_context->generator_object_prototype_map(); |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 4382 | } else { |
| 4383 | // Each function prototype gets a fresh map to avoid unwanted sharing of |
| 4384 | // maps between prototypes of different constructors. |
| 4385 | JSFunction* object_function = native_context->object_function(); |
| 4386 | ASSERT(object_function->has_initial_map()); |
| 4387 | MaybeObject* maybe_map = object_function->initial_map()->Copy(); |
| 4388 | if (!maybe_map->To(&new_map)) return maybe_map; |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 4389 | } |
verwaest@chromium.org | 753aee4 | 2012-07-17 16:15:42 +0000 | [diff] [blame] | 4390 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4391 | Object* prototype; |
verwaest@chromium.org | 753aee4 | 2012-07-17 16:15:42 +0000 | [diff] [blame] | 4392 | MaybeObject* maybe_prototype = AllocateJSObjectFromMap(new_map); |
| 4393 | if (!maybe_prototype->ToObject(&prototype)) return maybe_prototype; |
| 4394 | |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 4395 | if (!function->shared()->is_generator()) { |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 4396 | MaybeObject* maybe_failure = |
dslomov@chromium.org | 4a35c5a | 2013-09-13 07:28:52 +0000 | [diff] [blame] | 4397 | JSObject::cast(prototype)->SetLocalPropertyIgnoreAttributesTrampoline( |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 4398 | constructor_string(), function, DONT_ENUM); |
| 4399 | if (maybe_failure->IsFailure()) return maybe_failure; |
| 4400 | } |
verwaest@chromium.org | 753aee4 | 2012-07-17 16:15:42 +0000 | [diff] [blame] | 4401 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4402 | return prototype; |
| 4403 | } |
| 4404 | |
| 4405 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4406 | MaybeObject* Heap::AllocateFunction(Map* function_map, |
| 4407 | SharedFunctionInfo* shared, |
| 4408 | Object* prototype, |
| 4409 | PretenureFlag pretenure) { |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 4410 | AllocationSpace space = |
| 4411 | (pretenure == TENURED) ? OLD_POINTER_SPACE : NEW_SPACE; |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4412 | Object* result; |
| 4413 | { MaybeObject* maybe_result = Allocate(function_map, space); |
| 4414 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 4415 | } |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 4416 | InitializeFunction(JSFunction::cast(result), shared, prototype); |
| 4417 | return result; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4418 | } |
| 4419 | |
| 4420 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4421 | MaybeObject* Heap::AllocateArgumentsObject(Object* callee, int length) { |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 4422 | // To get fast allocation and map sharing for arguments objects we |
| 4423 | // allocate them based on an arguments boilerplate. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4424 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 4425 | JSObject* boilerplate; |
| 4426 | int arguments_object_size; |
| 4427 | bool strict_mode_callee = callee->IsJSFunction() && |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 4428 | !JSFunction::cast(callee)->shared()->is_classic_mode(); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 4429 | if (strict_mode_callee) { |
| 4430 | boilerplate = |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 4431 | isolate()->context()->native_context()-> |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 4432 | strict_mode_arguments_boilerplate(); |
| 4433 | arguments_object_size = kArgumentsObjectSizeStrict; |
| 4434 | } else { |
| 4435 | boilerplate = |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 4436 | isolate()->context()->native_context()->arguments_boilerplate(); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 4437 | arguments_object_size = kArgumentsObjectSize; |
| 4438 | } |
| 4439 | |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 4440 | // Check that the size of the boilerplate matches our |
| 4441 | // expectations. The ArgumentsAccessStub::GenerateNewObject relies |
| 4442 | // on the size being a known constant. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 4443 | ASSERT(arguments_object_size == boilerplate->map()->instance_size()); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 4444 | |
| 4445 | // Do the allocation. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4446 | Object* result; |
| 4447 | { MaybeObject* maybe_result = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 4448 | AllocateRaw(arguments_object_size, NEW_SPACE, OLD_POINTER_SPACE); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4449 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 4450 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4451 | |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 4452 | // Copy the content. The arguments boilerplate doesn't have any |
| 4453 | // fields that point to new space so it's safe to skip the write |
| 4454 | // barrier here. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4455 | CopyBlock(HeapObject::cast(result)->address(), |
| 4456 | boilerplate->address(), |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 4457 | JSObject::kHeaderSize); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4458 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 4459 | // Set the length property. |
| 4460 | JSObject::cast(result)->InObjectPropertyAtPut(kArgumentsLengthIndex, |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 4461 | Smi::FromInt(length), |
| 4462 | SKIP_WRITE_BARRIER); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 4463 | // Set the callee property for non-strict mode arguments object only. |
| 4464 | if (!strict_mode_callee) { |
| 4465 | JSObject::cast(result)->InObjectPropertyAtPut(kArgumentsCalleeIndex, |
| 4466 | callee); |
| 4467 | } |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 4468 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4469 | // Check the state of the object |
| 4470 | ASSERT(JSObject::cast(result)->HasFastProperties()); |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 4471 | ASSERT(JSObject::cast(result)->HasFastObjectElements()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4472 | |
| 4473 | return result; |
| 4474 | } |
| 4475 | |
| 4476 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4477 | MaybeObject* Heap::AllocateInitialMap(JSFunction* fun) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4478 | ASSERT(!fun->has_initial_map()); |
| 4479 | |
sgjesse@chromium.org | 911335c | 2009-08-19 12:59:44 +0000 | [diff] [blame] | 4480 | // First create a new map with the size and number of in-object properties |
| 4481 | // suggested by the function. |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 4482 | InstanceType instance_type; |
| 4483 | int instance_size; |
| 4484 | int in_object_properties; |
| 4485 | if (fun->shared()->is_generator()) { |
| 4486 | instance_type = JS_GENERATOR_OBJECT_TYPE; |
| 4487 | instance_size = JSGeneratorObject::kSize; |
| 4488 | in_object_properties = 0; |
| 4489 | } else { |
| 4490 | instance_type = JS_OBJECT_TYPE; |
| 4491 | instance_size = fun->shared()->CalculateInstanceSize(); |
| 4492 | in_object_properties = fun->shared()->CalculateInObjectProperties(); |
| 4493 | } |
yangguo@chromium.org | 304cc33 | 2012-07-24 07:59:48 +0000 | [diff] [blame] | 4494 | Map* map; |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 4495 | MaybeObject* maybe_map = AllocateMap(instance_type, instance_size); |
yangguo@chromium.org | 304cc33 | 2012-07-24 07:59:48 +0000 | [diff] [blame] | 4496 | if (!maybe_map->To(&map)) return maybe_map; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4497 | |
| 4498 | // Fetch or allocate prototype. |
| 4499 | Object* prototype; |
| 4500 | if (fun->has_instance_prototype()) { |
| 4501 | prototype = fun->instance_prototype(); |
| 4502 | } else { |
yangguo@chromium.org | 304cc33 | 2012-07-24 07:59:48 +0000 | [diff] [blame] | 4503 | MaybeObject* maybe_prototype = AllocateFunctionPrototype(fun); |
| 4504 | if (!maybe_prototype->To(&prototype)) return maybe_prototype; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4505 | } |
sgjesse@chromium.org | 911335c | 2009-08-19 12:59:44 +0000 | [diff] [blame] | 4506 | map->set_inobject_properties(in_object_properties); |
| 4507 | map->set_unused_property_fields(in_object_properties); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4508 | map->set_prototype(prototype); |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 4509 | ASSERT(map->has_fast_object_elements()); |
sgjesse@chromium.org | 911335c | 2009-08-19 12:59:44 +0000 | [diff] [blame] | 4510 | |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 4511 | if (!fun->shared()->is_generator()) { |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 4512 | fun->shared()->StartInobjectSlackTracking(map); |
| 4513 | } |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 4514 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4515 | return map; |
| 4516 | } |
| 4517 | |
| 4518 | |
| 4519 | void Heap::InitializeJSObjectFromMap(JSObject* obj, |
| 4520 | FixedArray* properties, |
| 4521 | Map* map) { |
| 4522 | obj->set_properties(properties); |
| 4523 | obj->initialize_elements(); |
| 4524 | // TODO(1240798): Initialize the object's body using valid initial values |
| 4525 | // according to the object's initial map. For example, if the map's |
| 4526 | // instance type is JS_ARRAY_TYPE, the length field should be initialized |
ulan@chromium.org | 2efb900 | 2012-01-19 15:36:35 +0000 | [diff] [blame] | 4527 | // to a number (e.g. Smi::FromInt(0)) and the elements initialized to a |
| 4528 | // fixed array (e.g. Heap::empty_fixed_array()). Currently, the object |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4529 | // verification code has to cope with (temporarily) invalid objects. See |
| 4530 | // for example, JSArray::JSArrayVerify). |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 4531 | Object* filler; |
| 4532 | // We cannot always fill with one_pointer_filler_map because objects |
| 4533 | // created from API functions expect their internal fields to be initialized |
| 4534 | // with undefined_value. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 4535 | // Pre-allocated fields need to be initialized with undefined_value as well |
| 4536 | // so that object accesses before the constructor completes (e.g. in the |
| 4537 | // debugger) will not cause a crash. |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 4538 | if (map->constructor()->IsJSFunction() && |
| 4539 | JSFunction::cast(map->constructor())->shared()-> |
| 4540 | IsInobjectSlackTrackingInProgress()) { |
| 4541 | // We might want to shrink the object later. |
| 4542 | ASSERT(obj->GetInternalFieldCount() == 0); |
| 4543 | filler = Heap::one_pointer_filler_map(); |
| 4544 | } else { |
| 4545 | filler = Heap::undefined_value(); |
| 4546 | } |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 4547 | obj->InitializeBody(map, Heap::undefined_value(), filler); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4548 | } |
| 4549 | |
| 4550 | |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 4551 | MaybeObject* Heap::AllocateJSObjectFromMap( |
| 4552 | Map* map, PretenureFlag pretenure, bool allocate_properties) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4553 | // JSFunctions should be allocated using AllocateFunction to be |
| 4554 | // properly initialized. |
| 4555 | ASSERT(map->instance_type() != JS_FUNCTION_TYPE); |
| 4556 | |
fschneider@chromium.org | 40b9da3 | 2010-06-28 11:29:21 +0000 | [diff] [blame] | 4557 | // Both types of global objects should be allocated using |
| 4558 | // AllocateGlobalObject to be properly initialized. |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 4559 | ASSERT(map->instance_type() != JS_GLOBAL_OBJECT_TYPE); |
| 4560 | ASSERT(map->instance_type() != JS_BUILTINS_OBJECT_TYPE); |
| 4561 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4562 | // Allocate the backing storage for the properties. |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 4563 | FixedArray* properties; |
| 4564 | if (allocate_properties) { |
| 4565 | int prop_size = map->InitialPropertiesLength(); |
| 4566 | ASSERT(prop_size >= 0); |
| 4567 | { MaybeObject* maybe_properties = AllocateFixedArray(prop_size, pretenure); |
| 4568 | if (!maybe_properties->To(&properties)) return maybe_properties; |
| 4569 | } |
| 4570 | } else { |
| 4571 | properties = empty_fixed_array(); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4572 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4573 | |
| 4574 | // Allocate the JSObject. |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 4575 | int size = map->instance_size(); |
| 4576 | AllocationSpace space = SelectSpace(size, OLD_POINTER_SPACE, pretenure); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4577 | Object* obj; |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4578 | MaybeObject* maybe_obj = Allocate(map, space); |
| 4579 | if (!maybe_obj->To(&obj)) return maybe_obj; |
| 4580 | |
| 4581 | // Initialize the JSObject. |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 4582 | InitializeJSObjectFromMap(JSObject::cast(obj), properties, map); |
jkummerow@chromium.org | 4e308cf | 2013-05-17 13:39:16 +0000 | [diff] [blame] | 4583 | ASSERT(JSObject::cast(obj)->HasFastElements() || |
| 4584 | JSObject::cast(obj)->HasExternalArrayElements()); |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4585 | return obj; |
| 4586 | } |
| 4587 | |
| 4588 | |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 4589 | MaybeObject* Heap::AllocateJSObjectFromMapWithAllocationSite( |
| 4590 | Map* map, Handle<AllocationSite> allocation_site) { |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4591 | // JSFunctions should be allocated using AllocateFunction to be |
| 4592 | // properly initialized. |
| 4593 | ASSERT(map->instance_type() != JS_FUNCTION_TYPE); |
| 4594 | |
| 4595 | // Both types of global objects should be allocated using |
| 4596 | // AllocateGlobalObject to be properly initialized. |
| 4597 | ASSERT(map->instance_type() != JS_GLOBAL_OBJECT_TYPE); |
| 4598 | ASSERT(map->instance_type() != JS_BUILTINS_OBJECT_TYPE); |
| 4599 | |
| 4600 | // Allocate the backing storage for the properties. |
jkummerow@chromium.org | 1048047 | 2013-07-17 08:22:15 +0000 | [diff] [blame] | 4601 | int prop_size = map->InitialPropertiesLength(); |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4602 | ASSERT(prop_size >= 0); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 4603 | FixedArray* properties; |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4604 | { MaybeObject* maybe_properties = AllocateFixedArray(prop_size); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 4605 | if (!maybe_properties->To(&properties)) return maybe_properties; |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4606 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4607 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4608 | // Allocate the JSObject. |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 4609 | int size = map->instance_size(); |
| 4610 | AllocationSpace space = SelectSpace(size, OLD_POINTER_SPACE, NOT_TENURED); |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4611 | Object* obj; |
danno@chromium.org | bee5199 | 2013-07-10 14:57:15 +0000 | [diff] [blame] | 4612 | MaybeObject* maybe_obj = |
| 4613 | AllocateWithAllocationSite(map, space, allocation_site); |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4614 | if (!maybe_obj->To(&obj)) return maybe_obj; |
| 4615 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4616 | // Initialize the JSObject. |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 4617 | InitializeJSObjectFromMap(JSObject::cast(obj), properties, map); |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 4618 | ASSERT(JSObject::cast(obj)->HasFastElements()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4619 | return obj; |
| 4620 | } |
| 4621 | |
| 4622 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4623 | MaybeObject* Heap::AllocateJSObject(JSFunction* constructor, |
| 4624 | PretenureFlag pretenure) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4625 | // Allocate the initial map if absent. |
| 4626 | if (!constructor->has_initial_map()) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4627 | Object* initial_map; |
| 4628 | { MaybeObject* maybe_initial_map = AllocateInitialMap(constructor); |
| 4629 | if (!maybe_initial_map->ToObject(&initial_map)) return maybe_initial_map; |
| 4630 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4631 | constructor->set_initial_map(Map::cast(initial_map)); |
| 4632 | Map::cast(initial_map)->set_constructor(constructor); |
| 4633 | } |
| 4634 | // Allocate the object based on the constructors initial map. |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 4635 | MaybeObject* result = AllocateJSObjectFromMap( |
| 4636 | constructor->initial_map(), pretenure); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4637 | #ifdef DEBUG |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 4638 | // Make sure result is NOT a global object if valid. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4639 | Object* non_failure; |
| 4640 | ASSERT(!result->ToObject(&non_failure) || !non_failure->IsGlobalObject()); |
| 4641 | #endif |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 4642 | return result; |
| 4643 | } |
| 4644 | |
| 4645 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4646 | MaybeObject* Heap::AllocateJSObjectWithAllocationSite(JSFunction* constructor, |
danno@chromium.org | bee5199 | 2013-07-10 14:57:15 +0000 | [diff] [blame] | 4647 | Handle<AllocationSite> allocation_site) { |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4648 | // Allocate the initial map if absent. |
| 4649 | if (!constructor->has_initial_map()) { |
| 4650 | Object* initial_map; |
| 4651 | { MaybeObject* maybe_initial_map = AllocateInitialMap(constructor); |
| 4652 | if (!maybe_initial_map->ToObject(&initial_map)) return maybe_initial_map; |
| 4653 | } |
| 4654 | constructor->set_initial_map(Map::cast(initial_map)); |
| 4655 | Map::cast(initial_map)->set_constructor(constructor); |
| 4656 | } |
| 4657 | // Allocate the object based on the constructors initial map, or the payload |
| 4658 | // advice |
| 4659 | Map* initial_map = constructor->initial_map(); |
| 4660 | |
danno@chromium.org | bee5199 | 2013-07-10 14:57:15 +0000 | [diff] [blame] | 4661 | Smi* smi = Smi::cast(allocation_site->transition_info()); |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4662 | ElementsKind to_kind = static_cast<ElementsKind>(smi->value()); |
| 4663 | AllocationSiteMode mode = TRACK_ALLOCATION_SITE; |
| 4664 | if (to_kind != initial_map->elements_kind()) { |
ulan@chromium.org | 57ff881 | 2013-05-10 08:16:55 +0000 | [diff] [blame] | 4665 | MaybeObject* maybe_new_map = initial_map->AsElementsKind(to_kind); |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4666 | if (!maybe_new_map->To(&initial_map)) return maybe_new_map; |
| 4667 | // Possibly alter the mode, since we found an updated elements kind |
| 4668 | // in the type info cell. |
danno@chromium.org | bee5199 | 2013-07-10 14:57:15 +0000 | [diff] [blame] | 4669 | mode = AllocationSite::GetMode(to_kind); |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4670 | } |
| 4671 | |
| 4672 | MaybeObject* result; |
| 4673 | if (mode == TRACK_ALLOCATION_SITE) { |
| 4674 | result = AllocateJSObjectFromMapWithAllocationSite(initial_map, |
danno@chromium.org | bee5199 | 2013-07-10 14:57:15 +0000 | [diff] [blame] | 4675 | allocation_site); |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4676 | } else { |
| 4677 | result = AllocateJSObjectFromMap(initial_map, NOT_TENURED); |
| 4678 | } |
| 4679 | #ifdef DEBUG |
| 4680 | // Make sure result is NOT a global object if valid. |
| 4681 | Object* non_failure; |
| 4682 | ASSERT(!result->ToObject(&non_failure) || !non_failure->IsGlobalObject()); |
| 4683 | #endif |
| 4684 | return result; |
| 4685 | } |
| 4686 | |
| 4687 | |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 4688 | MaybeObject* Heap::AllocateJSGeneratorObject(JSFunction *function) { |
| 4689 | ASSERT(function->shared()->is_generator()); |
| 4690 | Map *map; |
| 4691 | if (function->has_initial_map()) { |
| 4692 | map = function->initial_map(); |
| 4693 | } else { |
| 4694 | // Allocate the initial map if absent. |
| 4695 | MaybeObject* maybe_map = AllocateInitialMap(function); |
| 4696 | if (!maybe_map->To(&map)) return maybe_map; |
| 4697 | function->set_initial_map(map); |
mstarzinger@chromium.org | b228be0 | 2013-04-18 14:56:59 +0000 | [diff] [blame] | 4698 | map->set_constructor(function); |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 4699 | } |
| 4700 | ASSERT(map->instance_type() == JS_GENERATOR_OBJECT_TYPE); |
| 4701 | return AllocateJSObjectFromMap(map); |
| 4702 | } |
| 4703 | |
| 4704 | |
danno@chromium.org | 81cac2b | 2012-07-10 11:28:27 +0000 | [diff] [blame] | 4705 | MaybeObject* Heap::AllocateJSModule(Context* context, ScopeInfo* scope_info) { |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 4706 | // Allocate a fresh map. Modules do not have a prototype. |
| 4707 | Map* map; |
| 4708 | MaybeObject* maybe_map = AllocateMap(JS_MODULE_TYPE, JSModule::kSize); |
| 4709 | if (!maybe_map->To(&map)) return maybe_map; |
| 4710 | // Allocate the object based on the map. |
danno@chromium.org | 81cac2b | 2012-07-10 11:28:27 +0000 | [diff] [blame] | 4711 | JSModule* module; |
| 4712 | MaybeObject* maybe_module = AllocateJSObjectFromMap(map, TENURED); |
| 4713 | if (!maybe_module->To(&module)) return maybe_module; |
| 4714 | module->set_context(context); |
| 4715 | module->set_scope_info(scope_info); |
| 4716 | return module; |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 4717 | } |
| 4718 | |
| 4719 | |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 4720 | MaybeObject* Heap::AllocateJSArrayAndStorage( |
| 4721 | ElementsKind elements_kind, |
| 4722 | int length, |
| 4723 | int capacity, |
| 4724 | ArrayStorageAllocationMode mode, |
| 4725 | PretenureFlag pretenure) { |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 4726 | MaybeObject* maybe_array = AllocateJSArray(elements_kind, pretenure); |
| 4727 | JSArray* array; |
| 4728 | if (!maybe_array->To(&array)) return maybe_array; |
| 4729 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4730 | // TODO(mvstanton): this body of code is duplicate with AllocateJSArrayStorage |
| 4731 | // for performance reasons. |
| 4732 | ASSERT(capacity >= length); |
| 4733 | |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 4734 | if (capacity == 0) { |
| 4735 | array->set_length(Smi::FromInt(0)); |
| 4736 | array->set_elements(empty_fixed_array()); |
| 4737 | return array; |
| 4738 | } |
| 4739 | |
| 4740 | FixedArrayBase* elms; |
| 4741 | MaybeObject* maybe_elms = NULL; |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 4742 | if (IsFastDoubleElementsKind(elements_kind)) { |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 4743 | if (mode == DONT_INITIALIZE_ARRAY_ELEMENTS) { |
| 4744 | maybe_elms = AllocateUninitializedFixedDoubleArray(capacity); |
| 4745 | } else { |
| 4746 | ASSERT(mode == INITIALIZE_ARRAY_ELEMENTS_WITH_HOLE); |
| 4747 | maybe_elms = AllocateFixedDoubleArrayWithHoles(capacity); |
| 4748 | } |
| 4749 | } else { |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 4750 | ASSERT(IsFastSmiOrObjectElementsKind(elements_kind)); |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 4751 | if (mode == DONT_INITIALIZE_ARRAY_ELEMENTS) { |
| 4752 | maybe_elms = AllocateUninitializedFixedArray(capacity); |
| 4753 | } else { |
| 4754 | ASSERT(mode == INITIALIZE_ARRAY_ELEMENTS_WITH_HOLE); |
| 4755 | maybe_elms = AllocateFixedArrayWithHoles(capacity); |
| 4756 | } |
| 4757 | } |
| 4758 | if (!maybe_elms->To(&elms)) return maybe_elms; |
| 4759 | |
| 4760 | array->set_elements(elms); |
| 4761 | array->set_length(Smi::FromInt(length)); |
| 4762 | return array; |
| 4763 | } |
| 4764 | |
| 4765 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4766 | MaybeObject* Heap::AllocateJSArrayStorage( |
| 4767 | JSArray* array, |
| 4768 | int length, |
| 4769 | int capacity, |
| 4770 | ArrayStorageAllocationMode mode) { |
| 4771 | ASSERT(capacity >= length); |
| 4772 | |
| 4773 | if (capacity == 0) { |
| 4774 | array->set_length(Smi::FromInt(0)); |
| 4775 | array->set_elements(empty_fixed_array()); |
| 4776 | return array; |
| 4777 | } |
| 4778 | |
| 4779 | FixedArrayBase* elms; |
| 4780 | MaybeObject* maybe_elms = NULL; |
| 4781 | ElementsKind elements_kind = array->GetElementsKind(); |
| 4782 | if (IsFastDoubleElementsKind(elements_kind)) { |
| 4783 | if (mode == DONT_INITIALIZE_ARRAY_ELEMENTS) { |
| 4784 | maybe_elms = AllocateUninitializedFixedDoubleArray(capacity); |
| 4785 | } else { |
| 4786 | ASSERT(mode == INITIALIZE_ARRAY_ELEMENTS_WITH_HOLE); |
| 4787 | maybe_elms = AllocateFixedDoubleArrayWithHoles(capacity); |
| 4788 | } |
| 4789 | } else { |
| 4790 | ASSERT(IsFastSmiOrObjectElementsKind(elements_kind)); |
| 4791 | if (mode == DONT_INITIALIZE_ARRAY_ELEMENTS) { |
| 4792 | maybe_elms = AllocateUninitializedFixedArray(capacity); |
| 4793 | } else { |
| 4794 | ASSERT(mode == INITIALIZE_ARRAY_ELEMENTS_WITH_HOLE); |
| 4795 | maybe_elms = AllocateFixedArrayWithHoles(capacity); |
| 4796 | } |
| 4797 | } |
| 4798 | if (!maybe_elms->To(&elms)) return maybe_elms; |
| 4799 | |
| 4800 | array->set_elements(elms); |
| 4801 | array->set_length(Smi::FromInt(length)); |
| 4802 | return array; |
| 4803 | } |
| 4804 | |
| 4805 | |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 4806 | MaybeObject* Heap::AllocateJSArrayWithElements( |
| 4807 | FixedArrayBase* elements, |
| 4808 | ElementsKind elements_kind, |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 4809 | int length, |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 4810 | PretenureFlag pretenure) { |
| 4811 | MaybeObject* maybe_array = AllocateJSArray(elements_kind, pretenure); |
| 4812 | JSArray* array; |
| 4813 | if (!maybe_array->To(&array)) return maybe_array; |
| 4814 | |
| 4815 | array->set_elements(elements); |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 4816 | array->set_length(Smi::FromInt(length)); |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 4817 | array->ValidateElements(); |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 4818 | return array; |
| 4819 | } |
| 4820 | |
| 4821 | |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4822 | MaybeObject* Heap::AllocateJSProxy(Object* handler, Object* prototype) { |
| 4823 | // Allocate map. |
| 4824 | // TODO(rossberg): Once we optimize proxies, think about a scheme to share |
| 4825 | // maps. Will probably depend on the identity of the handler object, too. |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 4826 | Map* map; |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4827 | MaybeObject* maybe_map_obj = AllocateMap(JS_PROXY_TYPE, JSProxy::kSize); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 4828 | if (!maybe_map_obj->To<Map>(&map)) return maybe_map_obj; |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4829 | map->set_prototype(prototype); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4830 | |
| 4831 | // Allocate the proxy object. |
lrn@chromium.org | 34e6078 | 2011-09-15 07:25:40 +0000 | [diff] [blame] | 4832 | JSProxy* result; |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4833 | MaybeObject* maybe_result = Allocate(map, NEW_SPACE); |
lrn@chromium.org | 34e6078 | 2011-09-15 07:25:40 +0000 | [diff] [blame] | 4834 | if (!maybe_result->To<JSProxy>(&result)) return maybe_result; |
| 4835 | result->InitializeBody(map->instance_size(), Smi::FromInt(0)); |
| 4836 | result->set_handler(handler); |
ricow@chromium.org | 27bf288 | 2011-11-17 08:34:43 +0000 | [diff] [blame] | 4837 | result->set_hash(undefined_value(), SKIP_WRITE_BARRIER); |
lrn@chromium.org | 34e6078 | 2011-09-15 07:25:40 +0000 | [diff] [blame] | 4838 | return result; |
| 4839 | } |
| 4840 | |
| 4841 | |
| 4842 | MaybeObject* Heap::AllocateJSFunctionProxy(Object* handler, |
| 4843 | Object* call_trap, |
| 4844 | Object* construct_trap, |
| 4845 | Object* prototype) { |
| 4846 | // Allocate map. |
| 4847 | // TODO(rossberg): Once we optimize proxies, think about a scheme to share |
| 4848 | // maps. Will probably depend on the identity of the handler object, too. |
| 4849 | Map* map; |
| 4850 | MaybeObject* maybe_map_obj = |
| 4851 | AllocateMap(JS_FUNCTION_PROXY_TYPE, JSFunctionProxy::kSize); |
| 4852 | if (!maybe_map_obj->To<Map>(&map)) return maybe_map_obj; |
| 4853 | map->set_prototype(prototype); |
| 4854 | |
| 4855 | // Allocate the proxy object. |
| 4856 | JSFunctionProxy* result; |
| 4857 | MaybeObject* maybe_result = Allocate(map, NEW_SPACE); |
| 4858 | if (!maybe_result->To<JSFunctionProxy>(&result)) return maybe_result; |
| 4859 | result->InitializeBody(map->instance_size(), Smi::FromInt(0)); |
| 4860 | result->set_handler(handler); |
ricow@chromium.org | 27bf288 | 2011-11-17 08:34:43 +0000 | [diff] [blame] | 4861 | result->set_hash(undefined_value(), SKIP_WRITE_BARRIER); |
lrn@chromium.org | 34e6078 | 2011-09-15 07:25:40 +0000 | [diff] [blame] | 4862 | result->set_call_trap(call_trap); |
| 4863 | result->set_construct_trap(construct_trap); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4864 | return result; |
| 4865 | } |
| 4866 | |
| 4867 | |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 4868 | MaybeObject* Heap::CopyJSObject(JSObject* source, AllocationSite* site) { |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 4869 | // Never used to copy functions. If functions need to be copied we |
| 4870 | // have to be careful to clear the literals array. |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 4871 | SLOW_ASSERT(!source->IsJSFunction()); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 4872 | |
| 4873 | // Make the clone. |
| 4874 | Map* map = source->map(); |
| 4875 | int object_size = map->instance_size(); |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 4876 | Object* clone; |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 4877 | |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 4878 | ASSERT(site == NULL || (AllocationSite::CanTrack(map->instance_type()) && |
| 4879 | map->instance_type() == JS_ARRAY_TYPE)); |
| 4880 | |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 4881 | WriteBarrierMode wb_mode = UPDATE_WRITE_BARRIER; |
| 4882 | |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 4883 | // If we're forced to always allocate, we use the general allocation |
| 4884 | // functions which may leave us with an object in old space. |
| 4885 | if (always_allocate()) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4886 | { MaybeObject* maybe_clone = |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4887 | AllocateRaw(object_size, NEW_SPACE, OLD_POINTER_SPACE); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4888 | if (!maybe_clone->ToObject(&clone)) return maybe_clone; |
| 4889 | } |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 4890 | Address clone_address = HeapObject::cast(clone)->address(); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4891 | CopyBlock(clone_address, |
| 4892 | source->address(), |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 4893 | object_size); |
| 4894 | // Update write barrier for all fields that lie beyond the header. |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 4895 | RecordWrites(clone_address, |
| 4896 | JSObject::kHeaderSize, |
antonm@chromium.org | 8e5e338 | 2010-03-24 09:56:30 +0000 | [diff] [blame] | 4897 | (object_size - JSObject::kHeaderSize) / kPointerSize); |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 4898 | } else { |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 4899 | wb_mode = SKIP_WRITE_BARRIER; |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4900 | |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 4901 | { int adjusted_object_size = site != NULL |
| 4902 | ? object_size + AllocationMemento::kSize |
| 4903 | : object_size; |
| 4904 | MaybeObject* maybe_clone = new_space_.AllocateRaw(adjusted_object_size); |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4905 | if (!maybe_clone->ToObject(&clone)) return maybe_clone; |
| 4906 | } |
| 4907 | SLOW_ASSERT(InNewSpace(clone)); |
| 4908 | // Since we know the clone is allocated in new space, we can copy |
| 4909 | // the contents without worrying about updating the write barrier. |
| 4910 | CopyBlock(HeapObject::cast(clone)->address(), |
| 4911 | source->address(), |
| 4912 | object_size); |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4913 | |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 4914 | if (site != NULL) { |
| 4915 | AllocationMemento* alloc_memento = reinterpret_cast<AllocationMemento*>( |
| 4916 | reinterpret_cast<Address>(clone) + object_size); |
| 4917 | alloc_memento->set_map_no_write_barrier(allocation_memento_map()); |
| 4918 | ASSERT(site->map() == allocation_site_map()); |
| 4919 | alloc_memento->set_allocation_site(site, SKIP_WRITE_BARRIER); |
mstarzinger@chromium.org | a2e1a40 | 2013-10-15 08:25:05 +0000 | [diff] [blame] | 4920 | HeapProfiler* profiler = isolate()->heap_profiler(); |
| 4921 | if (profiler->is_tracking_allocations()) { |
| 4922 | profiler->UpdateObjectSizeEvent(HeapObject::cast(clone)->address(), |
| 4923 | object_size); |
| 4924 | profiler->NewObjectEvent(alloc_memento->address(), |
| 4925 | AllocationMemento::kSize); |
| 4926 | } |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4927 | } |
yangguo@chromium.org | 46a2a51 | 2013-01-18 16:29:40 +0000 | [diff] [blame] | 4928 | } |
| 4929 | |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 4930 | SLOW_ASSERT( |
| 4931 | JSObject::cast(clone)->GetElementsKind() == source->GetElementsKind()); |
ricow@chromium.org | 2c99e28 | 2011-07-28 09:15:17 +0000 | [diff] [blame] | 4932 | FixedArrayBase* elements = FixedArrayBase::cast(source->elements()); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 4933 | FixedArray* properties = FixedArray::cast(source->properties()); |
| 4934 | // Update elements if necessary. |
ager@chromium.org | b26c50a | 2010-03-26 09:27:16 +0000 | [diff] [blame] | 4935 | if (elements->length() > 0) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4936 | Object* elem; |
ricow@chromium.org | 2c99e28 | 2011-07-28 09:15:17 +0000 | [diff] [blame] | 4937 | { MaybeObject* maybe_elem; |
| 4938 | if (elements->map() == fixed_cow_array_map()) { |
| 4939 | maybe_elem = FixedArray::cast(elements); |
| 4940 | } else if (source->HasFastDoubleElements()) { |
| 4941 | maybe_elem = CopyFixedDoubleArray(FixedDoubleArray::cast(elements)); |
| 4942 | } else { |
| 4943 | maybe_elem = CopyFixedArray(FixedArray::cast(elements)); |
| 4944 | } |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4945 | if (!maybe_elem->ToObject(&elem)) return maybe_elem; |
| 4946 | } |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 4947 | JSObject::cast(clone)->set_elements(FixedArrayBase::cast(elem), wb_mode); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 4948 | } |
| 4949 | // Update properties if necessary. |
| 4950 | if (properties->length() > 0) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 4951 | Object* prop; |
| 4952 | { MaybeObject* maybe_prop = CopyFixedArray(properties); |
| 4953 | if (!maybe_prop->ToObject(&prop)) return maybe_prop; |
| 4954 | } |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 4955 | JSObject::cast(clone)->set_properties(FixedArray::cast(prop), wb_mode); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 4956 | } |
| 4957 | // Return the new clone. |
| 4958 | return clone; |
| 4959 | } |
| 4960 | |
| 4961 | |
lrn@chromium.org | 34e6078 | 2011-09-15 07:25:40 +0000 | [diff] [blame] | 4962 | MaybeObject* Heap::ReinitializeJSReceiver( |
| 4963 | JSReceiver* object, InstanceType type, int size) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 4964 | ASSERT(type >= FIRST_JS_OBJECT_TYPE); |
lrn@chromium.org | 34e6078 | 2011-09-15 07:25:40 +0000 | [diff] [blame] | 4965 | |
rossberg@chromium.org | 717967f | 2011-07-20 13:44:42 +0000 | [diff] [blame] | 4966 | // Allocate fresh map. |
| 4967 | // TODO(rossberg): Once we optimize proxies, cache these maps. |
| 4968 | Map* map; |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 4969 | MaybeObject* maybe = AllocateMap(type, size); |
| 4970 | if (!maybe->To<Map>(&map)) return maybe; |
rossberg@chromium.org | 717967f | 2011-07-20 13:44:42 +0000 | [diff] [blame] | 4971 | |
lrn@chromium.org | 34e6078 | 2011-09-15 07:25:40 +0000 | [diff] [blame] | 4972 | // Check that the receiver has at least the size of the fresh object. |
| 4973 | int size_difference = object->map()->instance_size() - map->instance_size(); |
| 4974 | ASSERT(size_difference >= 0); |
rossberg@chromium.org | 717967f | 2011-07-20 13:44:42 +0000 | [diff] [blame] | 4975 | |
| 4976 | map->set_prototype(object->map()->prototype()); |
| 4977 | |
| 4978 | // Allocate the backing storage for the properties. |
| 4979 | int prop_size = map->unused_property_fields() - map->inobject_properties(); |
| 4980 | Object* properties; |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 4981 | maybe = AllocateFixedArray(prop_size, TENURED); |
| 4982 | if (!maybe->ToObject(&properties)) return maybe; |
| 4983 | |
| 4984 | // Functions require some allocation, which might fail here. |
| 4985 | SharedFunctionInfo* shared = NULL; |
| 4986 | if (type == JS_FUNCTION_TYPE) { |
| 4987 | String* name; |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4988 | maybe = |
| 4989 | InternalizeOneByteString(STATIC_ASCII_VECTOR("<freezing call trap>")); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 4990 | if (!maybe->To<String>(&name)) return maybe; |
| 4991 | maybe = AllocateSharedFunctionInfo(name); |
| 4992 | if (!maybe->To<SharedFunctionInfo>(&shared)) return maybe; |
rossberg@chromium.org | 717967f | 2011-07-20 13:44:42 +0000 | [diff] [blame] | 4993 | } |
| 4994 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 4995 | // Because of possible retries of this function after failure, |
| 4996 | // we must NOT fail after this point, where we have changed the type! |
| 4997 | |
rossberg@chromium.org | 717967f | 2011-07-20 13:44:42 +0000 | [diff] [blame] | 4998 | // Reset the map for the object. |
| 4999 | object->set_map(map); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5000 | JSObject* jsobj = JSObject::cast(object); |
rossberg@chromium.org | 717967f | 2011-07-20 13:44:42 +0000 | [diff] [blame] | 5001 | |
| 5002 | // Reinitialize the object from the constructor map. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5003 | InitializeJSObjectFromMap(jsobj, FixedArray::cast(properties), map); |
lrn@chromium.org | 34e6078 | 2011-09-15 07:25:40 +0000 | [diff] [blame] | 5004 | |
| 5005 | // Functions require some minimal initialization. |
| 5006 | if (type == JS_FUNCTION_TYPE) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5007 | map->set_function_with_prototype(true); |
| 5008 | InitializeFunction(JSFunction::cast(object), shared, the_hole_value()); |
| 5009 | JSFunction::cast(object)->set_context( |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 5010 | isolate()->context()->native_context()); |
lrn@chromium.org | 34e6078 | 2011-09-15 07:25:40 +0000 | [diff] [blame] | 5011 | } |
| 5012 | |
| 5013 | // Put in filler if the new object is smaller than the old. |
| 5014 | if (size_difference > 0) { |
| 5015 | CreateFillerObjectAt( |
| 5016 | object->address() + map->instance_size(), size_difference); |
| 5017 | } |
| 5018 | |
rossberg@chromium.org | 717967f | 2011-07-20 13:44:42 +0000 | [diff] [blame] | 5019 | return object; |
| 5020 | } |
| 5021 | |
| 5022 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5023 | MaybeObject* Heap::ReinitializeJSGlobalProxy(JSFunction* constructor, |
| 5024 | JSGlobalProxy* object) { |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 5025 | ASSERT(constructor->has_initial_map()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5026 | Map* map = constructor->initial_map(); |
| 5027 | |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 5028 | // Check that the already allocated object has the same size and type as |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5029 | // objects allocated using the constructor. |
| 5030 | ASSERT(map->instance_size() == object->map()->instance_size()); |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 5031 | ASSERT(map->instance_type() == object->map()->instance_type()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5032 | |
| 5033 | // Allocate the backing storage for the properties. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 5034 | int prop_size = map->unused_property_fields() - map->inobject_properties(); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5035 | Object* properties; |
| 5036 | { MaybeObject* maybe_properties = AllocateFixedArray(prop_size, TENURED); |
| 5037 | if (!maybe_properties->ToObject(&properties)) return maybe_properties; |
| 5038 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5039 | |
| 5040 | // Reset the map for the object. |
| 5041 | object->set_map(constructor->initial_map()); |
| 5042 | |
| 5043 | // Reinitialize the object from the constructor map. |
| 5044 | InitializeJSObjectFromMap(object, FixedArray::cast(properties), map); |
| 5045 | return object; |
| 5046 | } |
| 5047 | |
| 5048 | |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 5049 | MaybeObject* Heap::AllocateStringFromOneByte(Vector<const uint8_t> string, |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5050 | PretenureFlag pretenure) { |
ulan@chromium.org | 56c14af | 2012-09-20 12:51:09 +0000 | [diff] [blame] | 5051 | int length = string.length(); |
| 5052 | if (length == 1) { |
ricow@chromium.org | 55ee807 | 2011-09-08 16:33:10 +0000 | [diff] [blame] | 5053 | return Heap::LookupSingleCharacterStringFromCode(string[0]); |
| 5054 | } |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5055 | Object* result; |
| 5056 | { MaybeObject* maybe_result = |
ulan@chromium.org | 8e8d882 | 2012-11-23 14:36:46 +0000 | [diff] [blame] | 5057 | AllocateRawOneByteString(string.length(), pretenure); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5058 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 5059 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5060 | |
| 5061 | // Copy the characters into the new object. |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 5062 | CopyChars(SeqOneByteString::cast(result)->GetChars(), |
| 5063 | string.start(), |
| 5064 | length); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5065 | return result; |
| 5066 | } |
| 5067 | |
| 5068 | |
fschneider@chromium.org | 9e3e0b6 | 2011-01-03 10:16:46 +0000 | [diff] [blame] | 5069 | MaybeObject* Heap::AllocateStringFromUtf8Slow(Vector<const char> string, |
rossberg@chromium.org | 89e18f5 | 2012-10-22 13:09:53 +0000 | [diff] [blame] | 5070 | int non_ascii_start, |
fschneider@chromium.org | 9e3e0b6 | 2011-01-03 10:16:46 +0000 | [diff] [blame] | 5071 | PretenureFlag pretenure) { |
rossberg@chromium.org | 89e18f5 | 2012-10-22 13:09:53 +0000 | [diff] [blame] | 5072 | // Continue counting the number of characters in the UTF-8 string, starting |
| 5073 | // from the first non-ascii character or word. |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 5074 | Access<UnicodeCache::Utf8Decoder> |
| 5075 | decoder(isolate_->unicode_cache()->utf8_decoder()); |
yangguo@chromium.org | a6bbcc8 | 2012-12-21 12:35:02 +0000 | [diff] [blame] | 5076 | decoder->Reset(string.start() + non_ascii_start, |
| 5077 | string.length() - non_ascii_start); |
| 5078 | int utf16_length = decoder->Utf16Length(); |
| 5079 | ASSERT(utf16_length > 0); |
| 5080 | // Allocate string. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5081 | Object* result; |
yangguo@chromium.org | a6bbcc8 | 2012-12-21 12:35:02 +0000 | [diff] [blame] | 5082 | { |
| 5083 | int chars = non_ascii_start + utf16_length; |
| 5084 | MaybeObject* maybe_result = AllocateRawTwoByteString(chars, pretenure); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5085 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 5086 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5087 | // Convert and copy the characters into the new object. |
ulan@chromium.org | 56c14af | 2012-09-20 12:51:09 +0000 | [diff] [blame] | 5088 | SeqTwoByteString* twobyte = SeqTwoByteString::cast(result); |
yangguo@chromium.org | a6bbcc8 | 2012-12-21 12:35:02 +0000 | [diff] [blame] | 5089 | // Copy ascii portion. |
| 5090 | uint16_t* data = twobyte->GetChars(); |
| 5091 | if (non_ascii_start != 0) { |
| 5092 | const char* ascii_data = string.start(); |
| 5093 | for (int i = 0; i < non_ascii_start; i++) { |
| 5094 | *data++ = *ascii_data++; |
yangguo@chromium.org | 154ff99 | 2012-03-13 08:09:54 +0000 | [diff] [blame] | 5095 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5096 | } |
yangguo@chromium.org | a6bbcc8 | 2012-12-21 12:35:02 +0000 | [diff] [blame] | 5097 | // Now write the remainder. |
| 5098 | decoder->WriteUtf16(data, utf16_length); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5099 | return result; |
| 5100 | } |
| 5101 | |
| 5102 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5103 | MaybeObject* Heap::AllocateStringFromTwoByte(Vector<const uc16> string, |
| 5104 | PretenureFlag pretenure) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5105 | // Check if the string is an ASCII string. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5106 | Object* result; |
ulan@chromium.org | 56c14af | 2012-09-20 12:51:09 +0000 | [diff] [blame] | 5107 | int length = string.length(); |
| 5108 | const uc16* start = string.start(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5109 | |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 5110 | if (String::IsOneByte(start, length)) { |
ulan@chromium.org | 8e8d882 | 2012-11-23 14:36:46 +0000 | [diff] [blame] | 5111 | MaybeObject* maybe_result = AllocateRawOneByteString(length, pretenure); |
ulan@chromium.org | 56c14af | 2012-09-20 12:51:09 +0000 | [diff] [blame] | 5112 | if (!maybe_result->ToObject(&result)) return maybe_result; |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 5113 | CopyChars(SeqOneByteString::cast(result)->GetChars(), start, length); |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 5114 | } else { // It's not a one byte string. |
ulan@chromium.org | 56c14af | 2012-09-20 12:51:09 +0000 | [diff] [blame] | 5115 | MaybeObject* maybe_result = AllocateRawTwoByteString(length, pretenure); |
| 5116 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 5117 | CopyChars(SeqTwoByteString::cast(result)->GetChars(), start, length); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5118 | } |
| 5119 | return result; |
| 5120 | } |
| 5121 | |
| 5122 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 5123 | Map* Heap::InternalizedStringMapForString(String* string) { |
| 5124 | // If the string is in new space it cannot be used as internalized. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5125 | if (InNewSpace(string)) return NULL; |
| 5126 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 5127 | // Find the corresponding internalized string map for strings. |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 5128 | switch (string->map()->instance_type()) { |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 5129 | case STRING_TYPE: return internalized_string_map(); |
| 5130 | case ASCII_STRING_TYPE: return ascii_internalized_string_map(); |
| 5131 | case CONS_STRING_TYPE: return cons_internalized_string_map(); |
| 5132 | case CONS_ASCII_STRING_TYPE: return cons_ascii_internalized_string_map(); |
| 5133 | case EXTERNAL_STRING_TYPE: return external_internalized_string_map(); |
| 5134 | case EXTERNAL_ASCII_STRING_TYPE: |
| 5135 | return external_ascii_internalized_string_map(); |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 5136 | case EXTERNAL_STRING_WITH_ONE_BYTE_DATA_TYPE: |
| 5137 | return external_internalized_string_with_one_byte_data_map(); |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 5138 | case SHORT_EXTERNAL_STRING_TYPE: |
| 5139 | return short_external_internalized_string_map(); |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 5140 | case SHORT_EXTERNAL_ASCII_STRING_TYPE: |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 5141 | return short_external_ascii_internalized_string_map(); |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 5142 | case SHORT_EXTERNAL_STRING_WITH_ONE_BYTE_DATA_TYPE: |
| 5143 | return short_external_internalized_string_with_one_byte_data_map(); |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 5144 | default: return NULL; // No match found. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 5145 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5146 | } |
| 5147 | |
| 5148 | |
yangguo@chromium.org | 46a2a51 | 2013-01-18 16:29:40 +0000 | [diff] [blame] | 5149 | static inline void WriteOneByteData(Vector<const char> vector, |
| 5150 | uint8_t* chars, |
| 5151 | int len) { |
| 5152 | // Only works for ascii. |
| 5153 | ASSERT(vector.length() == len); |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 5154 | OS::MemCopy(chars, vector.start(), len); |
yangguo@chromium.org | 46a2a51 | 2013-01-18 16:29:40 +0000 | [diff] [blame] | 5155 | } |
yangguo@chromium.org | a6bbcc8 | 2012-12-21 12:35:02 +0000 | [diff] [blame] | 5156 | |
yangguo@chromium.org | 46a2a51 | 2013-01-18 16:29:40 +0000 | [diff] [blame] | 5157 | static inline void WriteTwoByteData(Vector<const char> vector, |
| 5158 | uint16_t* chars, |
| 5159 | int len) { |
| 5160 | const uint8_t* stream = reinterpret_cast<const uint8_t*>(vector.start()); |
| 5161 | unsigned stream_length = vector.length(); |
| 5162 | while (stream_length != 0) { |
| 5163 | unsigned consumed = 0; |
| 5164 | uint32_t c = unibrow::Utf8::ValueOf(stream, stream_length, &consumed); |
| 5165 | ASSERT(c != unibrow::Utf8::kBadChar); |
| 5166 | ASSERT(consumed <= stream_length); |
| 5167 | stream_length -= consumed; |
| 5168 | stream += consumed; |
| 5169 | if (c > unibrow::Utf16::kMaxNonSurrogateCharCode) { |
| 5170 | len -= 2; |
| 5171 | if (len < 0) break; |
| 5172 | *chars++ = unibrow::Utf16::LeadSurrogate(c); |
| 5173 | *chars++ = unibrow::Utf16::TrailSurrogate(c); |
| 5174 | } else { |
| 5175 | len -= 1; |
| 5176 | if (len < 0) break; |
| 5177 | *chars++ = c; |
yangguo@chromium.org | a6bbcc8 | 2012-12-21 12:35:02 +0000 | [diff] [blame] | 5178 | } |
yangguo@chromium.org | a6bbcc8 | 2012-12-21 12:35:02 +0000 | [diff] [blame] | 5179 | } |
yangguo@chromium.org | 46a2a51 | 2013-01-18 16:29:40 +0000 | [diff] [blame] | 5180 | ASSERT(stream_length == 0); |
| 5181 | ASSERT(len == 0); |
| 5182 | } |
yangguo@chromium.org | a6bbcc8 | 2012-12-21 12:35:02 +0000 | [diff] [blame] | 5183 | |
| 5184 | |
yangguo@chromium.org | 46a2a51 | 2013-01-18 16:29:40 +0000 | [diff] [blame] | 5185 | static inline void WriteOneByteData(String* s, uint8_t* chars, int len) { |
| 5186 | ASSERT(s->length() == len); |
| 5187 | String::WriteToFlat(s, chars, 0, len); |
| 5188 | } |
yangguo@chromium.org | a6bbcc8 | 2012-12-21 12:35:02 +0000 | [diff] [blame] | 5189 | |
mstarzinger@chromium.org | e0e1b0d | 2013-07-08 08:38:06 +0000 | [diff] [blame] | 5190 | |
yangguo@chromium.org | 46a2a51 | 2013-01-18 16:29:40 +0000 | [diff] [blame] | 5191 | static inline void WriteTwoByteData(String* s, uint16_t* chars, int len) { |
| 5192 | ASSERT(s->length() == len); |
| 5193 | String::WriteToFlat(s, chars, 0, len); |
| 5194 | } |
yangguo@chromium.org | a6bbcc8 | 2012-12-21 12:35:02 +0000 | [diff] [blame] | 5195 | |
| 5196 | |
| 5197 | template<bool is_one_byte, typename T> |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 5198 | MaybeObject* Heap::AllocateInternalizedStringImpl( |
| 5199 | T t, int chars, uint32_t hash_field) { |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 5200 | ASSERT(chars >= 0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5201 | // Compute map and object size. |
| 5202 | int size; |
| 5203 | Map* map; |
| 5204 | |
yangguo@chromium.org | a6bbcc8 | 2012-12-21 12:35:02 +0000 | [diff] [blame] | 5205 | if (is_one_byte) { |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 5206 | if (chars > SeqOneByteString::kMaxLength) { |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 5207 | return Failure::OutOfMemoryException(0x9); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 5208 | } |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 5209 | map = ascii_internalized_string_map(); |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 5210 | size = SeqOneByteString::SizeFor(chars); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5211 | } else { |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 5212 | if (chars > SeqTwoByteString::kMaxLength) { |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 5213 | return Failure::OutOfMemoryException(0xa); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 5214 | } |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 5215 | map = internalized_string_map(); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 5216 | size = SeqTwoByteString::SizeFor(chars); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5217 | } |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 5218 | AllocationSpace space = SelectSpace(size, OLD_DATA_SPACE, TENURED); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5219 | |
| 5220 | // Allocate string. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5221 | Object* result; |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 5222 | { MaybeObject* maybe_result = AllocateRaw(size, space, OLD_DATA_SPACE); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5223 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 5224 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5225 | |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 5226 | reinterpret_cast<HeapObject*>(result)->set_map_no_write_barrier(map); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 5227 | // Set length and hash fields of the allocated string. |
ager@chromium.org | 870a0b6 | 2008-11-04 11:43:05 +0000 | [diff] [blame] | 5228 | String* answer = String::cast(result); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 5229 | answer->set_length(chars); |
| 5230 | answer->set_hash_field(hash_field); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5231 | |
ager@chromium.org | 870a0b6 | 2008-11-04 11:43:05 +0000 | [diff] [blame] | 5232 | ASSERT_EQ(size, answer->Size()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5233 | |
yangguo@chromium.org | a6bbcc8 | 2012-12-21 12:35:02 +0000 | [diff] [blame] | 5234 | if (is_one_byte) { |
yangguo@chromium.org | 46a2a51 | 2013-01-18 16:29:40 +0000 | [diff] [blame] | 5235 | WriteOneByteData(t, SeqOneByteString::cast(answer)->GetChars(), chars); |
yangguo@chromium.org | a6bbcc8 | 2012-12-21 12:35:02 +0000 | [diff] [blame] | 5236 | } else { |
yangguo@chromium.org | 46a2a51 | 2013-01-18 16:29:40 +0000 | [diff] [blame] | 5237 | WriteTwoByteData(t, SeqTwoByteString::cast(answer)->GetChars(), chars); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5238 | } |
ager@chromium.org | 870a0b6 | 2008-11-04 11:43:05 +0000 | [diff] [blame] | 5239 | return answer; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5240 | } |
| 5241 | |
| 5242 | |
yangguo@chromium.org | a6bbcc8 | 2012-12-21 12:35:02 +0000 | [diff] [blame] | 5243 | // Need explicit instantiations. |
| 5244 | template |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 5245 | MaybeObject* Heap::AllocateInternalizedStringImpl<true>(String*, int, uint32_t); |
yangguo@chromium.org | a6bbcc8 | 2012-12-21 12:35:02 +0000 | [diff] [blame] | 5246 | template |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 5247 | MaybeObject* Heap::AllocateInternalizedStringImpl<false>( |
| 5248 | String*, int, uint32_t); |
yangguo@chromium.org | a6bbcc8 | 2012-12-21 12:35:02 +0000 | [diff] [blame] | 5249 | template |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 5250 | MaybeObject* Heap::AllocateInternalizedStringImpl<false>( |
| 5251 | Vector<const char>, int, uint32_t); |
yangguo@chromium.org | a6bbcc8 | 2012-12-21 12:35:02 +0000 | [diff] [blame] | 5252 | |
| 5253 | |
ulan@chromium.org | 8e8d882 | 2012-11-23 14:36:46 +0000 | [diff] [blame] | 5254 | MaybeObject* Heap::AllocateRawOneByteString(int length, |
| 5255 | PretenureFlag pretenure) { |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 5256 | if (length < 0 || length > SeqOneByteString::kMaxLength) { |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 5257 | return Failure::OutOfMemoryException(0xb); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 5258 | } |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 5259 | int size = SeqOneByteString::SizeFor(length); |
| 5260 | ASSERT(size <= SeqOneByteString::kMaxSize); |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 5261 | AllocationSpace space = SelectSpace(size, OLD_DATA_SPACE, pretenure); |
yangguo@chromium.org | c73d55b | 2013-07-24 08:18:28 +0000 | [diff] [blame] | 5262 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5263 | Object* result; |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 5264 | { MaybeObject* maybe_result = AllocateRaw(size, space, OLD_DATA_SPACE); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5265 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 5266 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5267 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5268 | // Partially initialize the object. |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 5269 | HeapObject::cast(result)->set_map_no_write_barrier(ascii_string_map()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5270 | String::cast(result)->set_length(length); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 5271 | String::cast(result)->set_hash_field(String::kEmptyHashField); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5272 | ASSERT_EQ(size, HeapObject::cast(result)->Size()); |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 5273 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5274 | return result; |
| 5275 | } |
| 5276 | |
| 5277 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5278 | MaybeObject* Heap::AllocateRawTwoByteString(int length, |
| 5279 | PretenureFlag pretenure) { |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 5280 | if (length < 0 || length > SeqTwoByteString::kMaxLength) { |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 5281 | return Failure::OutOfMemoryException(0xc); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 5282 | } |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 5283 | int size = SeqTwoByteString::SizeFor(length); |
| 5284 | ASSERT(size <= SeqTwoByteString::kMaxSize); |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 5285 | AllocationSpace space = SelectSpace(size, OLD_DATA_SPACE, pretenure); |
yangguo@chromium.org | c73d55b | 2013-07-24 08:18:28 +0000 | [diff] [blame] | 5286 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5287 | Object* result; |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 5288 | { MaybeObject* maybe_result = AllocateRaw(size, space, OLD_DATA_SPACE); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5289 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 5290 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5291 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5292 | // Partially initialize the object. |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 5293 | HeapObject::cast(result)->set_map_no_write_barrier(string_map()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5294 | String::cast(result)->set_length(length); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 5295 | String::cast(result)->set_hash_field(String::kEmptyHashField); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5296 | ASSERT_EQ(size, HeapObject::cast(result)->Size()); |
| 5297 | return result; |
| 5298 | } |
| 5299 | |
| 5300 | |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 5301 | MaybeObject* Heap::AllocateJSArray( |
| 5302 | ElementsKind elements_kind, |
| 5303 | PretenureFlag pretenure) { |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 5304 | Context* native_context = isolate()->context()->native_context(); |
| 5305 | JSFunction* array_function = native_context->array_function(); |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 5306 | Map* map = array_function->initial_map(); |
ulan@chromium.org | 906e2fb | 2013-05-14 08:14:38 +0000 | [diff] [blame] | 5307 | Map* transition_map = isolate()->get_initial_js_array_map(elements_kind); |
| 5308 | if (transition_map != NULL) map = transition_map; |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 5309 | return AllocateJSObjectFromMap(map, pretenure); |
| 5310 | } |
| 5311 | |
| 5312 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5313 | MaybeObject* Heap::AllocateEmptyFixedArray() { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5314 | int size = FixedArray::SizeFor(0); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5315 | Object* result; |
| 5316 | { MaybeObject* maybe_result = |
| 5317 | AllocateRaw(size, OLD_DATA_SPACE, OLD_DATA_SPACE); |
| 5318 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 5319 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5320 | // Initialize the object. |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 5321 | reinterpret_cast<FixedArray*>(result)->set_map_no_write_barrier( |
| 5322 | fixed_array_map()); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 5323 | reinterpret_cast<FixedArray*>(result)->set_length(0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5324 | return result; |
| 5325 | } |
| 5326 | |
mstarzinger@chromium.org | e0e1b0d | 2013-07-08 08:38:06 +0000 | [diff] [blame] | 5327 | |
jkummerow@chromium.org | 4e308cf | 2013-05-17 13:39:16 +0000 | [diff] [blame] | 5328 | MaybeObject* Heap::AllocateEmptyExternalArray(ExternalArrayType array_type) { |
| 5329 | return AllocateExternalArray(0, array_type, NULL, TENURED); |
| 5330 | } |
| 5331 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5332 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5333 | MaybeObject* Heap::CopyFixedArrayWithMap(FixedArray* src, Map* map) { |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 5334 | int len = src->length(); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5335 | Object* obj; |
machenbach@chromium.org | cfdf67d | 2013-09-27 07:27:26 +0000 | [diff] [blame] | 5336 | { MaybeObject* maybe_obj = AllocateRawFixedArray(len, NOT_TENURED); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5337 | if (!maybe_obj->ToObject(&obj)) return maybe_obj; |
| 5338 | } |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 5339 | if (InNewSpace(obj)) { |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 5340 | HeapObject* dst = HeapObject::cast(obj); |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 5341 | dst->set_map_no_write_barrier(map); |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 5342 | CopyBlock(dst->address() + kPointerSize, |
| 5343 | src->address() + kPointerSize, |
| 5344 | FixedArray::SizeFor(len) - kPointerSize); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 5345 | return obj; |
| 5346 | } |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 5347 | HeapObject::cast(obj)->set_map_no_write_barrier(map); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 5348 | FixedArray* result = FixedArray::cast(obj); |
| 5349 | result->set_length(len); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 5350 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 5351 | // Copy the content |
rossberg@chromium.org | 79e7902 | 2013-06-03 15:43:46 +0000 | [diff] [blame] | 5352 | DisallowHeapAllocation no_gc; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 5353 | WriteBarrierMode mode = result->GetWriteBarrierMode(no_gc); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 5354 | for (int i = 0; i < len; i++) result->set(i, src->get(i), mode); |
| 5355 | return result; |
| 5356 | } |
| 5357 | |
| 5358 | |
ricow@chromium.org | 2c99e28 | 2011-07-28 09:15:17 +0000 | [diff] [blame] | 5359 | MaybeObject* Heap::CopyFixedDoubleArrayWithMap(FixedDoubleArray* src, |
| 5360 | Map* map) { |
| 5361 | int len = src->length(); |
| 5362 | Object* obj; |
| 5363 | { MaybeObject* maybe_obj = AllocateRawFixedDoubleArray(len, NOT_TENURED); |
| 5364 | if (!maybe_obj->ToObject(&obj)) return maybe_obj; |
| 5365 | } |
| 5366 | HeapObject* dst = HeapObject::cast(obj); |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 5367 | dst->set_map_no_write_barrier(map); |
ricow@chromium.org | 2c99e28 | 2011-07-28 09:15:17 +0000 | [diff] [blame] | 5368 | CopyBlock( |
| 5369 | dst->address() + FixedDoubleArray::kLengthOffset, |
| 5370 | src->address() + FixedDoubleArray::kLengthOffset, |
| 5371 | FixedDoubleArray::SizeFor(len) - FixedDoubleArray::kLengthOffset); |
| 5372 | return obj; |
| 5373 | } |
| 5374 | |
| 5375 | |
mstarzinger@chromium.org | a2e1a40 | 2013-10-15 08:25:05 +0000 | [diff] [blame] | 5376 | MaybeObject* Heap::CopyConstantPoolArrayWithMap(ConstantPoolArray* src, |
| 5377 | Map* map) { |
| 5378 | int int64_entries = src->count_of_int64_entries(); |
| 5379 | int ptr_entries = src->count_of_ptr_entries(); |
| 5380 | int int32_entries = src->count_of_int32_entries(); |
| 5381 | Object* obj; |
| 5382 | { MaybeObject* maybe_obj = |
| 5383 | AllocateConstantPoolArray(int64_entries, ptr_entries, int32_entries); |
| 5384 | if (!maybe_obj->ToObject(&obj)) return maybe_obj; |
| 5385 | } |
| 5386 | HeapObject* dst = HeapObject::cast(obj); |
| 5387 | dst->set_map_no_write_barrier(map); |
| 5388 | CopyBlock( |
| 5389 | dst->address() + ConstantPoolArray::kLengthOffset, |
| 5390 | src->address() + ConstantPoolArray::kLengthOffset, |
| 5391 | ConstantPoolArray::SizeFor(int64_entries, ptr_entries, int32_entries) |
| 5392 | - ConstantPoolArray::kLengthOffset); |
| 5393 | return obj; |
| 5394 | } |
| 5395 | |
| 5396 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5397 | MaybeObject* Heap::AllocateRawFixedArray(int length, PretenureFlag pretenure) { |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 5398 | if (length < 0 || length > FixedArray::kMaxLength) { |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 5399 | return Failure::OutOfMemoryException(0xe); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 5400 | } |
yangguo@chromium.org | c73d55b | 2013-07-24 08:18:28 +0000 | [diff] [blame] | 5401 | int size = FixedArray::SizeFor(length); |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 5402 | AllocationSpace space = SelectSpace(size, OLD_POINTER_SPACE, pretenure); |
yangguo@chromium.org | c73d55b | 2013-07-24 08:18:28 +0000 | [diff] [blame] | 5403 | |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 5404 | return AllocateRaw(size, space, OLD_POINTER_SPACE); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 5405 | } |
| 5406 | |
| 5407 | |
machenbach@chromium.org | cfdf67d | 2013-09-27 07:27:26 +0000 | [diff] [blame] | 5408 | MaybeObject* Heap::AllocateFixedArrayWithFiller(int length, |
| 5409 | PretenureFlag pretenure, |
| 5410 | Object* filler) { |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 5411 | ASSERT(length >= 0); |
machenbach@chromium.org | cfdf67d | 2013-09-27 07:27:26 +0000 | [diff] [blame] | 5412 | ASSERT(empty_fixed_array()->IsFixedArray()); |
| 5413 | if (length == 0) return empty_fixed_array(); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 5414 | |
machenbach@chromium.org | cfdf67d | 2013-09-27 07:27:26 +0000 | [diff] [blame] | 5415 | ASSERT(!InNewSpace(filler)); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5416 | Object* result; |
machenbach@chromium.org | cfdf67d | 2013-09-27 07:27:26 +0000 | [diff] [blame] | 5417 | { MaybeObject* maybe_result = AllocateRawFixedArray(length, pretenure); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5418 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 5419 | } |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 5420 | |
machenbach@chromium.org | cfdf67d | 2013-09-27 07:27:26 +0000 | [diff] [blame] | 5421 | HeapObject::cast(result)->set_map_no_write_barrier(fixed_array_map()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5422 | FixedArray* array = FixedArray::cast(result); |
| 5423 | array->set_length(length); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 5424 | MemsetPointer(array->data_start(), filler, length); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5425 | return array; |
| 5426 | } |
| 5427 | |
| 5428 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5429 | MaybeObject* Heap::AllocateFixedArray(int length, PretenureFlag pretenure) { |
machenbach@chromium.org | cfdf67d | 2013-09-27 07:27:26 +0000 | [diff] [blame] | 5430 | return AllocateFixedArrayWithFiller(length, pretenure, undefined_value()); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 5431 | } |
| 5432 | |
| 5433 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5434 | MaybeObject* Heap::AllocateFixedArrayWithHoles(int length, |
| 5435 | PretenureFlag pretenure) { |
machenbach@chromium.org | cfdf67d | 2013-09-27 07:27:26 +0000 | [diff] [blame] | 5436 | return AllocateFixedArrayWithFiller(length, pretenure, the_hole_value()); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 5437 | } |
| 5438 | |
| 5439 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5440 | MaybeObject* Heap::AllocateUninitializedFixedArray(int length) { |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 5441 | if (length == 0) return empty_fixed_array(); |
| 5442 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5443 | Object* obj; |
machenbach@chromium.org | cfdf67d | 2013-09-27 07:27:26 +0000 | [diff] [blame] | 5444 | { MaybeObject* maybe_obj = AllocateRawFixedArray(length, NOT_TENURED); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5445 | if (!maybe_obj->ToObject(&obj)) return maybe_obj; |
| 5446 | } |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 5447 | |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 5448 | reinterpret_cast<FixedArray*>(obj)->set_map_no_write_barrier( |
| 5449 | fixed_array_map()); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 5450 | FixedArray::cast(obj)->set_length(length); |
| 5451 | return obj; |
| 5452 | } |
| 5453 | |
| 5454 | |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 5455 | MaybeObject* Heap::AllocateEmptyFixedDoubleArray() { |
| 5456 | int size = FixedDoubleArray::SizeFor(0); |
| 5457 | Object* result; |
| 5458 | { MaybeObject* maybe_result = |
| 5459 | AllocateRaw(size, OLD_DATA_SPACE, OLD_DATA_SPACE); |
| 5460 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 5461 | } |
| 5462 | // Initialize the object. |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 5463 | reinterpret_cast<FixedDoubleArray*>(result)->set_map_no_write_barrier( |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 5464 | fixed_double_array_map()); |
| 5465 | reinterpret_cast<FixedDoubleArray*>(result)->set_length(0); |
| 5466 | return result; |
| 5467 | } |
| 5468 | |
| 5469 | |
| 5470 | MaybeObject* Heap::AllocateUninitializedFixedDoubleArray( |
| 5471 | int length, |
| 5472 | PretenureFlag pretenure) { |
ulan@chromium.org | 65a89c2 | 2012-02-14 11:46:07 +0000 | [diff] [blame] | 5473 | if (length == 0) return empty_fixed_array(); |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 5474 | |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 5475 | Object* elements_object; |
| 5476 | MaybeObject* maybe_obj = AllocateRawFixedDoubleArray(length, pretenure); |
| 5477 | if (!maybe_obj->ToObject(&elements_object)) return maybe_obj; |
| 5478 | FixedDoubleArray* elements = |
| 5479 | reinterpret_cast<FixedDoubleArray*>(elements_object); |
| 5480 | |
| 5481 | elements->set_map_no_write_barrier(fixed_double_array_map()); |
| 5482 | elements->set_length(length); |
| 5483 | return elements; |
| 5484 | } |
| 5485 | |
| 5486 | |
| 5487 | MaybeObject* Heap::AllocateFixedDoubleArrayWithHoles( |
| 5488 | int length, |
| 5489 | PretenureFlag pretenure) { |
ulan@chromium.org | 65a89c2 | 2012-02-14 11:46:07 +0000 | [diff] [blame] | 5490 | if (length == 0) return empty_fixed_array(); |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 5491 | |
| 5492 | Object* elements_object; |
| 5493 | MaybeObject* maybe_obj = AllocateRawFixedDoubleArray(length, pretenure); |
| 5494 | if (!maybe_obj->ToObject(&elements_object)) return maybe_obj; |
| 5495 | FixedDoubleArray* elements = |
| 5496 | reinterpret_cast<FixedDoubleArray*>(elements_object); |
| 5497 | |
| 5498 | for (int i = 0; i < length; ++i) { |
| 5499 | elements->set_the_hole(i); |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 5500 | } |
| 5501 | |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 5502 | elements->set_map_no_write_barrier(fixed_double_array_map()); |
| 5503 | elements->set_length(length); |
| 5504 | return elements; |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 5505 | } |
| 5506 | |
| 5507 | |
| 5508 | MaybeObject* Heap::AllocateRawFixedDoubleArray(int length, |
| 5509 | PretenureFlag pretenure) { |
| 5510 | if (length < 0 || length > FixedDoubleArray::kMaxLength) { |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 5511 | return Failure::OutOfMemoryException(0xf); |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 5512 | } |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 5513 | int size = FixedDoubleArray::SizeFor(length); |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 5514 | #ifndef V8_HOST_ARCH_64_BIT |
| 5515 | size += kPointerSize; |
| 5516 | #endif |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 5517 | AllocationSpace space = SelectSpace(size, OLD_DATA_SPACE, pretenure); |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 5518 | |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 5519 | HeapObject* object; |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 5520 | { MaybeObject* maybe_object = AllocateRaw(size, space, OLD_DATA_SPACE); |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 5521 | if (!maybe_object->To<HeapObject>(&object)) return maybe_object; |
| 5522 | } |
| 5523 | |
| 5524 | return EnsureDoubleAligned(this, object, size); |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 5525 | } |
| 5526 | |
| 5527 | |
mstarzinger@chromium.org | a2e1a40 | 2013-10-15 08:25:05 +0000 | [diff] [blame] | 5528 | MaybeObject* Heap::AllocateConstantPoolArray(int number_of_int64_entries, |
| 5529 | int number_of_ptr_entries, |
| 5530 | int number_of_int32_entries) { |
| 5531 | ASSERT(number_of_int64_entries > 0 || number_of_ptr_entries > 0 || |
| 5532 | number_of_int32_entries > 0); |
| 5533 | int size = ConstantPoolArray::SizeFor(number_of_int64_entries, |
| 5534 | number_of_ptr_entries, |
| 5535 | number_of_int32_entries); |
| 5536 | #ifndef V8_HOST_ARCH_64_BIT |
| 5537 | size += kPointerSize; |
| 5538 | #endif |
bmeurer@chromium.org | c9913f0 | 2013-10-24 06:31:36 +0000 | [diff] [blame] | 5539 | AllocationSpace space = SelectSpace(size, OLD_POINTER_SPACE, TENURED); |
mstarzinger@chromium.org | a2e1a40 | 2013-10-15 08:25:05 +0000 | [diff] [blame] | 5540 | |
| 5541 | HeapObject* object; |
bmeurer@chromium.org | c9913f0 | 2013-10-24 06:31:36 +0000 | [diff] [blame] | 5542 | { MaybeObject* maybe_object = AllocateRaw(size, space, OLD_POINTER_SPACE); |
mstarzinger@chromium.org | a2e1a40 | 2013-10-15 08:25:05 +0000 | [diff] [blame] | 5543 | if (!maybe_object->To<HeapObject>(&object)) return maybe_object; |
| 5544 | } |
| 5545 | object = EnsureDoubleAligned(this, object, size); |
| 5546 | HeapObject::cast(object)->set_map_no_write_barrier(constant_pool_array_map()); |
| 5547 | |
| 5548 | ConstantPoolArray* constant_pool = |
| 5549 | reinterpret_cast<ConstantPoolArray*>(object); |
| 5550 | constant_pool->SetEntryCounts(number_of_int64_entries, |
| 5551 | number_of_ptr_entries, |
| 5552 | number_of_int32_entries); |
| 5553 | MemsetPointer( |
| 5554 | HeapObject::RawField( |
| 5555 | constant_pool, |
| 5556 | constant_pool->OffsetOfElementAt(constant_pool->first_ptr_index())), |
| 5557 | undefined_value(), |
| 5558 | number_of_ptr_entries); |
| 5559 | return constant_pool; |
| 5560 | } |
| 5561 | |
| 5562 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5563 | MaybeObject* Heap::AllocateHashTable(int length, PretenureFlag pretenure) { |
| 5564 | Object* result; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 5565 | { MaybeObject* maybe_result = AllocateFixedArray(length, pretenure); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5566 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 5567 | } |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 5568 | reinterpret_cast<HeapObject*>(result)->set_map_no_write_barrier( |
| 5569 | hash_table_map()); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 5570 | ASSERT(result->IsHashTable()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5571 | return result; |
| 5572 | } |
| 5573 | |
| 5574 | |
mstarzinger@chromium.org | f705b50 | 2013-04-04 11:38:09 +0000 | [diff] [blame] | 5575 | MaybeObject* Heap::AllocateSymbol() { |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 5576 | // Statically ensure that it is safe to allocate symbols in paged spaces. |
| 5577 | STATIC_ASSERT(Symbol::kSize <= Page::kNonCodeObjectAreaSize); |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 5578 | |
| 5579 | Object* result; |
mstarzinger@chromium.org | f705b50 | 2013-04-04 11:38:09 +0000 | [diff] [blame] | 5580 | MaybeObject* maybe = |
| 5581 | AllocateRaw(Symbol::kSize, OLD_POINTER_SPACE, OLD_POINTER_SPACE); |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 5582 | if (!maybe->ToObject(&result)) return maybe; |
| 5583 | |
| 5584 | HeapObject::cast(result)->set_map_no_write_barrier(symbol_map()); |
| 5585 | |
| 5586 | // Generate a random hash value. |
| 5587 | int hash; |
| 5588 | int attempts = 0; |
| 5589 | do { |
hpayer@chromium.org | c5d4971 | 2013-09-11 08:25:48 +0000 | [diff] [blame] | 5590 | hash = isolate()->random_number_generator()->NextInt() & Name::kHashBitMask; |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 5591 | attempts++; |
| 5592 | } while (hash == 0 && attempts < 30); |
| 5593 | if (hash == 0) hash = 1; // never return 0 |
| 5594 | |
| 5595 | Symbol::cast(result)->set_hash_field( |
| 5596 | Name::kIsNotArrayIndexMask | (hash << Name::kHashShift)); |
mstarzinger@chromium.org | f705b50 | 2013-04-04 11:38:09 +0000 | [diff] [blame] | 5597 | Symbol::cast(result)->set_name(undefined_value()); |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 5598 | |
| 5599 | ASSERT(result->IsSymbol()); |
| 5600 | return result; |
| 5601 | } |
| 5602 | |
| 5603 | |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 5604 | MaybeObject* Heap::AllocateNativeContext() { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5605 | Object* result; |
| 5606 | { MaybeObject* maybe_result = |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 5607 | AllocateFixedArray(Context::NATIVE_CONTEXT_SLOTS); |
| 5608 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 5609 | } |
| 5610 | Context* context = reinterpret_cast<Context*>(result); |
| 5611 | context->set_map_no_write_barrier(native_context_map()); |
| 5612 | context->set_js_array_maps(undefined_value()); |
| 5613 | ASSERT(context->IsNativeContext()); |
| 5614 | ASSERT(result->IsContext()); |
| 5615 | return result; |
| 5616 | } |
| 5617 | |
| 5618 | |
| 5619 | MaybeObject* Heap::AllocateGlobalContext(JSFunction* function, |
| 5620 | ScopeInfo* scope_info) { |
| 5621 | Object* result; |
| 5622 | { MaybeObject* maybe_result = |
| 5623 | AllocateFixedArray(scope_info->ContextLength(), TENURED); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5624 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 5625 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5626 | Context* context = reinterpret_cast<Context*>(result); |
danno@chromium.org | eb83146 | 2012-08-24 11:57:08 +0000 | [diff] [blame] | 5627 | context->set_map_no_write_barrier(global_context_map()); |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 5628 | context->set_closure(function); |
yangguo@chromium.org | 355cfd1 | 2012-08-29 15:32:24 +0000 | [diff] [blame] | 5629 | context->set_previous(function->context()); |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 5630 | context->set_extension(scope_info); |
yangguo@chromium.org | 355cfd1 | 2012-08-29 15:32:24 +0000 | [diff] [blame] | 5631 | context->set_global_object(function->context()->global_object()); |
danno@chromium.org | eb83146 | 2012-08-24 11:57:08 +0000 | [diff] [blame] | 5632 | ASSERT(context->IsGlobalContext()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5633 | ASSERT(result->IsContext()); |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 5634 | return context; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5635 | } |
| 5636 | |
| 5637 | |
danno@chromium.org | 81cac2b | 2012-07-10 11:28:27 +0000 | [diff] [blame] | 5638 | MaybeObject* Heap::AllocateModuleContext(ScopeInfo* scope_info) { |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 5639 | Object* result; |
| 5640 | { MaybeObject* maybe_result = |
danno@chromium.org | 81cac2b | 2012-07-10 11:28:27 +0000 | [diff] [blame] | 5641 | AllocateFixedArray(scope_info->ContextLength(), TENURED); |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 5642 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 5643 | } |
| 5644 | Context* context = reinterpret_cast<Context*>(result); |
| 5645 | context->set_map_no_write_barrier(module_context_map()); |
ulan@chromium.org | 8e8d882 | 2012-11-23 14:36:46 +0000 | [diff] [blame] | 5646 | // Instance link will be set later. |
danno@chromium.org | 81cac2b | 2012-07-10 11:28:27 +0000 | [diff] [blame] | 5647 | context->set_extension(Smi::FromInt(0)); |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 5648 | return context; |
| 5649 | } |
| 5650 | |
| 5651 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5652 | MaybeObject* Heap::AllocateFunctionContext(int length, JSFunction* function) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5653 | ASSERT(length >= Context::MIN_CONTEXT_SLOTS); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5654 | Object* result; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 5655 | { MaybeObject* maybe_result = AllocateFixedArray(length); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5656 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 5657 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5658 | Context* context = reinterpret_cast<Context*>(result); |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 5659 | context->set_map_no_write_barrier(function_context_map()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5660 | context->set_closure(function); |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 5661 | context->set_previous(function->context()); |
danno@chromium.org | 81cac2b | 2012-07-10 11:28:27 +0000 | [diff] [blame] | 5662 | context->set_extension(Smi::FromInt(0)); |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 5663 | context->set_global_object(function->context()->global_object()); |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 5664 | return context; |
| 5665 | } |
| 5666 | |
| 5667 | |
vegorov@chromium.org | 3cf4731 | 2011-06-29 13:20:01 +0000 | [diff] [blame] | 5668 | MaybeObject* Heap::AllocateCatchContext(JSFunction* function, |
| 5669 | Context* previous, |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 5670 | String* name, |
| 5671 | Object* thrown_object) { |
| 5672 | STATIC_ASSERT(Context::MIN_CONTEXT_SLOTS == Context::THROWN_OBJECT_INDEX); |
| 5673 | Object* result; |
| 5674 | { MaybeObject* maybe_result = |
| 5675 | AllocateFixedArray(Context::MIN_CONTEXT_SLOTS + 1); |
| 5676 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 5677 | } |
| 5678 | Context* context = reinterpret_cast<Context*>(result); |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 5679 | context->set_map_no_write_barrier(catch_context_map()); |
vegorov@chromium.org | 3cf4731 | 2011-06-29 13:20:01 +0000 | [diff] [blame] | 5680 | context->set_closure(function); |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 5681 | context->set_previous(previous); |
| 5682 | context->set_extension(name); |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 5683 | context->set_global_object(previous->global_object()); |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 5684 | context->set(Context::THROWN_OBJECT_INDEX, thrown_object); |
| 5685 | return context; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5686 | } |
| 5687 | |
| 5688 | |
vegorov@chromium.org | 3cf4731 | 2011-06-29 13:20:01 +0000 | [diff] [blame] | 5689 | MaybeObject* Heap::AllocateWithContext(JSFunction* function, |
| 5690 | Context* previous, |
jkummerow@chromium.org | ba72ec8 | 2013-07-22 09:21:20 +0000 | [diff] [blame] | 5691 | JSReceiver* extension) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5692 | Object* result; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 5693 | { MaybeObject* maybe_result = AllocateFixedArray(Context::MIN_CONTEXT_SLOTS); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5694 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 5695 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5696 | Context* context = reinterpret_cast<Context*>(result); |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 5697 | context->set_map_no_write_barrier(with_context_map()); |
vegorov@chromium.org | 3cf4731 | 2011-06-29 13:20:01 +0000 | [diff] [blame] | 5698 | context->set_closure(function); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5699 | context->set_previous(previous); |
| 5700 | context->set_extension(extension); |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 5701 | context->set_global_object(previous->global_object()); |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 5702 | return context; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5703 | } |
| 5704 | |
| 5705 | |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 5706 | MaybeObject* Heap::AllocateBlockContext(JSFunction* function, |
| 5707 | Context* previous, |
jkummerow@chromium.org | c3b3712 | 2011-11-07 10:14:12 +0000 | [diff] [blame] | 5708 | ScopeInfo* scope_info) { |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 5709 | Object* result; |
| 5710 | { MaybeObject* maybe_result = |
jkummerow@chromium.org | c3b3712 | 2011-11-07 10:14:12 +0000 | [diff] [blame] | 5711 | AllocateFixedArrayWithHoles(scope_info->ContextLength()); |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 5712 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 5713 | } |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 5714 | Context* context = reinterpret_cast<Context*>(result); |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 5715 | context->set_map_no_write_barrier(block_context_map()); |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 5716 | context->set_closure(function); |
| 5717 | context->set_previous(previous); |
| 5718 | context->set_extension(scope_info); |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 5719 | context->set_global_object(previous->global_object()); |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 5720 | return context; |
| 5721 | } |
| 5722 | |
| 5723 | |
jkummerow@chromium.org | c3b3712 | 2011-11-07 10:14:12 +0000 | [diff] [blame] | 5724 | MaybeObject* Heap::AllocateScopeInfo(int length) { |
| 5725 | FixedArray* scope_info; |
| 5726 | MaybeObject* maybe_scope_info = AllocateFixedArray(length, TENURED); |
| 5727 | if (!maybe_scope_info->To(&scope_info)) return maybe_scope_info; |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 5728 | scope_info->set_map_no_write_barrier(scope_info_map()); |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 5729 | return scope_info; |
| 5730 | } |
| 5731 | |
| 5732 | |
yangguo@chromium.org | eeb44b6 | 2012-11-13 13:56:09 +0000 | [diff] [blame] | 5733 | MaybeObject* Heap::AllocateExternal(void* value) { |
| 5734 | Foreign* foreign; |
| 5735 | { MaybeObject* maybe_result = AllocateForeign(static_cast<Address>(value)); |
| 5736 | if (!maybe_result->To(&foreign)) return maybe_result; |
| 5737 | } |
| 5738 | JSObject* external; |
| 5739 | { MaybeObject* maybe_result = AllocateJSObjectFromMap(external_map()); |
| 5740 | if (!maybe_result->To(&external)) return maybe_result; |
| 5741 | } |
| 5742 | external->SetInternalField(0, foreign); |
| 5743 | return external; |
| 5744 | } |
| 5745 | |
| 5746 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5747 | MaybeObject* Heap::AllocateStruct(InstanceType type) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5748 | Map* map; |
| 5749 | switch (type) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 5750 | #define MAKE_CASE(NAME, Name, name) \ |
| 5751 | case NAME##_TYPE: map = name##_map(); break; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5752 | STRUCT_LIST(MAKE_CASE) |
| 5753 | #undef MAKE_CASE |
| 5754 | default: |
| 5755 | UNREACHABLE(); |
| 5756 | return Failure::InternalError(); |
| 5757 | } |
| 5758 | int size = map->instance_size(); |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 5759 | AllocationSpace space = SelectSpace(size, OLD_POINTER_SPACE, TENURED); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5760 | Object* result; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 5761 | { MaybeObject* maybe_result = Allocate(map, space); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 5762 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 5763 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5764 | Struct::cast(result)->InitializeBody(size); |
| 5765 | return result; |
| 5766 | } |
| 5767 | |
| 5768 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5769 | bool Heap::IsHeapIterable() { |
| 5770 | return (!old_pointer_space()->was_swept_conservatively() && |
| 5771 | !old_data_space()->was_swept_conservatively()); |
| 5772 | } |
| 5773 | |
| 5774 | |
| 5775 | void Heap::EnsureHeapIsIterable() { |
rossberg@chromium.org | 79e7902 | 2013-06-03 15:43:46 +0000 | [diff] [blame] | 5776 | ASSERT(AllowHeapAllocation::IsAllowed()); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5777 | if (!IsHeapIterable()) { |
rossberg@chromium.org | 994edf6 | 2012-02-06 10:12:55 +0000 | [diff] [blame] | 5778 | CollectAllGarbage(kMakeHeapIterableMask, "Heap::EnsureHeapIsIterable"); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5779 | } |
| 5780 | ASSERT(IsHeapIterable()); |
| 5781 | } |
| 5782 | |
| 5783 | |
ulan@chromium.org | 6ff6514 | 2012-03-21 09:52:17 +0000 | [diff] [blame] | 5784 | void Heap::AdvanceIdleIncrementalMarking(intptr_t step_size) { |
fschneider@chromium.org | 7d10be5 | 2012-04-10 12:30:14 +0000 | [diff] [blame] | 5785 | incremental_marking()->Step(step_size, |
| 5786 | IncrementalMarking::NO_GC_VIA_STACK_GUARD); |
ulan@chromium.org | 6ff6514 | 2012-03-21 09:52:17 +0000 | [diff] [blame] | 5787 | |
| 5788 | if (incremental_marking()->IsComplete()) { |
| 5789 | bool uncommit = false; |
| 5790 | if (gc_count_at_last_idle_gc_ == gc_count_) { |
| 5791 | // No GC since the last full GC, the mutator is probably not active. |
| 5792 | isolate_->compilation_cache()->Clear(); |
| 5793 | uncommit = true; |
| 5794 | } |
| 5795 | CollectAllGarbage(kNoGCFlags, "idle notification: finalize incremental"); |
dslomov@chromium.org | b752d40 | 2013-06-18 11:54:54 +0000 | [diff] [blame] | 5796 | mark_sweeps_since_idle_round_started_++; |
ulan@chromium.org | 6ff6514 | 2012-03-21 09:52:17 +0000 | [diff] [blame] | 5797 | gc_count_at_last_idle_gc_ = gc_count_; |
| 5798 | if (uncommit) { |
| 5799 | new_space_.Shrink(); |
| 5800 | UncommitFromSpace(); |
| 5801 | } |
| 5802 | } |
| 5803 | } |
| 5804 | |
| 5805 | |
svenpanne@chromium.org | ecb9dd6 | 2011-12-01 08:22:35 +0000 | [diff] [blame] | 5806 | bool Heap::IdleNotification(int hint) { |
yangguo@chromium.org | de0db00 | 2012-06-22 13:44:28 +0000 | [diff] [blame] | 5807 | // Hints greater than this value indicate that |
| 5808 | // the embedder is requesting a lot of GC work. |
danno@chromium.org | 88aa058 | 2012-03-23 15:11:57 +0000 | [diff] [blame] | 5809 | const int kMaxHint = 1000; |
dslomov@chromium.org | b752d40 | 2013-06-18 11:54:54 +0000 | [diff] [blame] | 5810 | const int kMinHintForIncrementalMarking = 10; |
yangguo@chromium.org | de0db00 | 2012-06-22 13:44:28 +0000 | [diff] [blame] | 5811 | // Minimal hint that allows to do full GC. |
| 5812 | const int kMinHintForFullGC = 100; |
danno@chromium.org | 2c26cb1 | 2012-05-03 09:06:43 +0000 | [diff] [blame] | 5813 | intptr_t size_factor = Min(Max(hint, 20), kMaxHint) / 4; |
| 5814 | // The size factor is in range [5..250]. The numbers here are chosen from |
| 5815 | // experiments. If you changes them, make sure to test with |
| 5816 | // chrome/performance_ui_tests --gtest_filter="GeneralMixMemoryTest.* |
verwaest@chromium.org | 33e09c8 | 2012-10-10 17:07:22 +0000 | [diff] [blame] | 5817 | intptr_t step_size = |
| 5818 | size_factor * IncrementalMarking::kAllocatedThreshold; |
ulan@chromium.org | 6ff6514 | 2012-03-21 09:52:17 +0000 | [diff] [blame] | 5819 | |
| 5820 | if (contexts_disposed_ > 0) { |
danno@chromium.org | 88aa058 | 2012-03-23 15:11:57 +0000 | [diff] [blame] | 5821 | if (hint >= kMaxHint) { |
| 5822 | // The embedder is requesting a lot of GC work after context disposal, |
| 5823 | // we age inline caches so that they don't keep objects from |
| 5824 | // the old context alive. |
| 5825 | AgeInlineCaches(); |
| 5826 | } |
ulan@chromium.org | 6ff6514 | 2012-03-21 09:52:17 +0000 | [diff] [blame] | 5827 | int mark_sweep_time = Min(TimeMarkSweepWouldTakeInMs(), 1000); |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 5828 | if (hint >= mark_sweep_time && !FLAG_expose_gc && |
| 5829 | incremental_marking()->IsStopped()) { |
ulan@chromium.org | 6ff6514 | 2012-03-21 09:52:17 +0000 | [diff] [blame] | 5830 | HistogramTimerScope scope(isolate_->counters()->gc_context()); |
| 5831 | CollectAllGarbage(kReduceMemoryFootprintMask, |
| 5832 | "idle notification: contexts disposed"); |
| 5833 | } else { |
| 5834 | AdvanceIdleIncrementalMarking(step_size); |
| 5835 | contexts_disposed_ = 0; |
| 5836 | } |
danno@chromium.org | 2c26cb1 | 2012-05-03 09:06:43 +0000 | [diff] [blame] | 5837 | // After context disposal there is likely a lot of garbage remaining, reset |
| 5838 | // the idle notification counters in order to trigger more incremental GCs |
| 5839 | // on subsequent idle notifications. |
| 5840 | StartIdleRound(); |
ulan@chromium.org | 6ff6514 | 2012-03-21 09:52:17 +0000 | [diff] [blame] | 5841 | return false; |
| 5842 | } |
| 5843 | |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 5844 | if (!FLAG_incremental_marking || FLAG_expose_gc || Serializer::enabled()) { |
ulan@chromium.org | 6ff6514 | 2012-03-21 09:52:17 +0000 | [diff] [blame] | 5845 | return IdleGlobalGC(); |
svenpanne@chromium.org | ecb9dd6 | 2011-12-01 08:22:35 +0000 | [diff] [blame] | 5846 | } |
| 5847 | |
| 5848 | // By doing small chunks of GC work in each IdleNotification, |
| 5849 | // perform a round of incremental GCs and after that wait until |
| 5850 | // the mutator creates enough garbage to justify a new round. |
| 5851 | // An incremental GC progresses as follows: |
| 5852 | // 1. many incremental marking steps, |
| 5853 | // 2. one old space mark-sweep-compact, |
| 5854 | // 3. many lazy sweep steps. |
| 5855 | // Use mark-sweep-compact events to count incremental GCs in a round. |
| 5856 | |
svenpanne@chromium.org | ecb9dd6 | 2011-12-01 08:22:35 +0000 | [diff] [blame] | 5857 | if (incremental_marking()->IsStopped()) { |
mstarzinger@chromium.org | e3b8d0f | 2013-02-01 09:06:41 +0000 | [diff] [blame] | 5858 | if (!mark_compact_collector()->AreSweeperThreadsActivated() && |
| 5859 | !IsSweepingComplete() && |
svenpanne@chromium.org | ecb9dd6 | 2011-12-01 08:22:35 +0000 | [diff] [blame] | 5860 | !AdvanceSweepers(static_cast<int>(step_size))) { |
| 5861 | return false; |
| 5862 | } |
| 5863 | } |
| 5864 | |
| 5865 | if (mark_sweeps_since_idle_round_started_ >= kMaxMarkSweepsInIdleRound) { |
| 5866 | if (EnoughGarbageSinceLastIdleRound()) { |
| 5867 | StartIdleRound(); |
| 5868 | } else { |
| 5869 | return true; |
| 5870 | } |
| 5871 | } |
| 5872 | |
yangguo@chromium.org | de0db00 | 2012-06-22 13:44:28 +0000 | [diff] [blame] | 5873 | int remaining_mark_sweeps = kMaxMarkSweepsInIdleRound - |
| 5874 | mark_sweeps_since_idle_round_started_; |
| 5875 | |
svenpanne@chromium.org | ecb9dd6 | 2011-12-01 08:22:35 +0000 | [diff] [blame] | 5876 | if (incremental_marking()->IsStopped()) { |
yangguo@chromium.org | de0db00 | 2012-06-22 13:44:28 +0000 | [diff] [blame] | 5877 | // If there are no more than two GCs left in this idle round and we are |
| 5878 | // allowed to do a full GC, then make those GCs full in order to compact |
| 5879 | // the code space. |
| 5880 | // TODO(ulan): Once we enable code compaction for incremental marking, |
| 5881 | // we can get rid of this special case and always start incremental marking. |
| 5882 | if (remaining_mark_sweeps <= 2 && hint >= kMinHintForFullGC) { |
| 5883 | CollectAllGarbage(kReduceMemoryFootprintMask, |
| 5884 | "idle notification: finalize idle round"); |
dslomov@chromium.org | b752d40 | 2013-06-18 11:54:54 +0000 | [diff] [blame] | 5885 | mark_sweeps_since_idle_round_started_++; |
| 5886 | } else if (hint > kMinHintForIncrementalMarking) { |
yangguo@chromium.org | de0db00 | 2012-06-22 13:44:28 +0000 | [diff] [blame] | 5887 | incremental_marking()->Start(); |
| 5888 | } |
svenpanne@chromium.org | ecb9dd6 | 2011-12-01 08:22:35 +0000 | [diff] [blame] | 5889 | } |
dslomov@chromium.org | b752d40 | 2013-06-18 11:54:54 +0000 | [diff] [blame] | 5890 | if (!incremental_marking()->IsStopped() && |
| 5891 | hint > kMinHintForIncrementalMarking) { |
yangguo@chromium.org | de0db00 | 2012-06-22 13:44:28 +0000 | [diff] [blame] | 5892 | AdvanceIdleIncrementalMarking(step_size); |
| 5893 | } |
dslomov@chromium.org | b752d40 | 2013-06-18 11:54:54 +0000 | [diff] [blame] | 5894 | |
| 5895 | if (mark_sweeps_since_idle_round_started_ >= kMaxMarkSweepsInIdleRound) { |
| 5896 | FinishIdleRound(); |
| 5897 | return true; |
| 5898 | } |
| 5899 | |
svenpanne@chromium.org | ecb9dd6 | 2011-12-01 08:22:35 +0000 | [diff] [blame] | 5900 | return false; |
| 5901 | } |
| 5902 | |
| 5903 | |
| 5904 | bool Heap::IdleGlobalGC() { |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 5905 | static const int kIdlesBeforeScavenge = 4; |
| 5906 | static const int kIdlesBeforeMarkSweep = 7; |
| 5907 | static const int kIdlesBeforeMarkCompact = 8; |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 5908 | static const int kMaxIdleCount = kIdlesBeforeMarkCompact + 1; |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 5909 | static const unsigned int kGCsBetweenCleanup = 4; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 5910 | |
| 5911 | if (!last_idle_notification_gc_count_init_) { |
| 5912 | last_idle_notification_gc_count_ = gc_count_; |
| 5913 | last_idle_notification_gc_count_init_ = true; |
| 5914 | } |
ager@chromium.org | 96c75b5 | 2009-08-26 09:13:16 +0000 | [diff] [blame] | 5915 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 5916 | bool uncommit = true; |
ager@chromium.org | 96c75b5 | 2009-08-26 09:13:16 +0000 | [diff] [blame] | 5917 | bool finished = false; |
| 5918 | |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 5919 | // Reset the number of idle notifications received when a number of |
| 5920 | // GCs have taken place. This allows another round of cleanup based |
| 5921 | // on idle notifications if enough work has been carried out to |
| 5922 | // provoke a number of garbage collections. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 5923 | if (gc_count_ - last_idle_notification_gc_count_ < kGCsBetweenCleanup) { |
| 5924 | number_idle_notifications_ = |
| 5925 | Min(number_idle_notifications_ + 1, kMaxIdleCount); |
ager@chromium.org | 96c75b5 | 2009-08-26 09:13:16 +0000 | [diff] [blame] | 5926 | } else { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 5927 | number_idle_notifications_ = 0; |
| 5928 | last_idle_notification_gc_count_ = gc_count_; |
ager@chromium.org | 96c75b5 | 2009-08-26 09:13:16 +0000 | [diff] [blame] | 5929 | } |
| 5930 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 5931 | if (number_idle_notifications_ == kIdlesBeforeScavenge) { |
ulan@chromium.org | 6ff6514 | 2012-03-21 09:52:17 +0000 | [diff] [blame] | 5932 | CollectGarbage(NEW_SPACE, "idle notification"); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 5933 | new_space_.Shrink(); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 5934 | last_idle_notification_gc_count_ = gc_count_; |
| 5935 | } else if (number_idle_notifications_ == kIdlesBeforeMarkSweep) { |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 5936 | // Before doing the mark-sweep collections we clear the |
| 5937 | // compilation cache to avoid hanging on to source code and |
| 5938 | // generated code for cached functions. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 5939 | isolate_->compilation_cache()->Clear(); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 5940 | |
rossberg@chromium.org | 994edf6 | 2012-02-06 10:12:55 +0000 | [diff] [blame] | 5941 | CollectAllGarbage(kReduceMemoryFootprintMask, "idle notification"); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 5942 | new_space_.Shrink(); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 5943 | last_idle_notification_gc_count_ = gc_count_; |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 5944 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 5945 | } else if (number_idle_notifications_ == kIdlesBeforeMarkCompact) { |
rossberg@chromium.org | 994edf6 | 2012-02-06 10:12:55 +0000 | [diff] [blame] | 5946 | CollectAllGarbage(kReduceMemoryFootprintMask, "idle notification"); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 5947 | new_space_.Shrink(); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 5948 | last_idle_notification_gc_count_ = gc_count_; |
| 5949 | number_idle_notifications_ = 0; |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 5950 | finished = true; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 5951 | } else if (number_idle_notifications_ > kIdlesBeforeMarkCompact) { |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 5952 | // If we have received more than kIdlesBeforeMarkCompact idle |
| 5953 | // notifications we do not perform any cleanup because we don't |
| 5954 | // expect to gain much by doing so. |
| 5955 | finished = true; |
ager@chromium.org | 96c75b5 | 2009-08-26 09:13:16 +0000 | [diff] [blame] | 5956 | } |
| 5957 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 5958 | if (uncommit) UncommitFromSpace(); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5959 | |
ager@chromium.org | 96c75b5 | 2009-08-26 09:13:16 +0000 | [diff] [blame] | 5960 | return finished; |
| 5961 | } |
| 5962 | |
| 5963 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5964 | #ifdef DEBUG |
| 5965 | |
| 5966 | void Heap::Print() { |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 5967 | if (!HasBeenSetUp()) return; |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 5968 | isolate()->PrintStack(stdout); |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 5969 | AllSpaces spaces(this); |
| 5970 | for (Space* space = spaces.next(); space != NULL; space = spaces.next()) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 5971 | space->Print(); |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 5972 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5973 | } |
| 5974 | |
| 5975 | |
| 5976 | void Heap::ReportCodeStatistics(const char* title) { |
| 5977 | PrintF(">>>>>> Code Stats (%s) >>>>>>\n", title); |
jkummerow@chromium.org | 3d00d0a | 2013-09-04 13:57:32 +0000 | [diff] [blame] | 5978 | PagedSpace::ResetCodeStatistics(isolate()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5979 | // We do not look for code in new space, map space, or old space. If code |
| 5980 | // somehow ends up in those spaces, we would miss it here. |
| 5981 | code_space_->CollectCodeStatistics(); |
| 5982 | lo_space_->CollectCodeStatistics(); |
jkummerow@chromium.org | 3d00d0a | 2013-09-04 13:57:32 +0000 | [diff] [blame] | 5983 | PagedSpace::ReportCodeStatistics(isolate()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5984 | } |
| 5985 | |
| 5986 | |
| 5987 | // This function expects that NewSpace's allocated objects histogram is |
| 5988 | // populated (via a call to CollectStatistics or else as a side effect of a |
| 5989 | // just-completed scavenge collection). |
| 5990 | void Heap::ReportHeapStatistics(const char* title) { |
| 5991 | USE(title); |
| 5992 | PrintF(">>>>>> =============== %s (%d) =============== >>>>>>\n", |
| 5993 | title, gc_count_); |
svenpanne@chromium.org | a53e8e0 | 2013-05-24 12:35:50 +0000 | [diff] [blame] | 5994 | PrintF("old_generation_allocation_limit_ %" V8_PTR_PREFIX "d\n", |
| 5995 | old_generation_allocation_limit_); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5996 | |
| 5997 | PrintF("\n"); |
ulan@chromium.org | 09d7ab5 | 2013-02-25 15:50:35 +0000 | [diff] [blame] | 5998 | PrintF("Number of handles : %d\n", HandleScope::NumberOfHandles(isolate_)); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 5999 | isolate_->global_handles()->PrintStats(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6000 | PrintF("\n"); |
| 6001 | |
| 6002 | PrintF("Heap statistics : "); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 6003 | isolate_->memory_allocator()->ReportStatistics(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6004 | PrintF("To space : "); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 6005 | new_space_.ReportStatistics(); |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 6006 | PrintF("Old pointer space : "); |
| 6007 | old_pointer_space_->ReportStatistics(); |
| 6008 | PrintF("Old data space : "); |
| 6009 | old_data_space_->ReportStatistics(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6010 | PrintF("Code space : "); |
| 6011 | code_space_->ReportStatistics(); |
| 6012 | PrintF("Map space : "); |
| 6013 | map_space_->ReportStatistics(); |
kasperl@chromium.org | defbd10 | 2009-07-13 14:04:26 +0000 | [diff] [blame] | 6014 | PrintF("Cell space : "); |
| 6015 | cell_space_->ReportStatistics(); |
dslomov@chromium.org | b752d40 | 2013-06-18 11:54:54 +0000 | [diff] [blame] | 6016 | PrintF("PropertyCell space : "); |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 6017 | property_cell_space_->ReportStatistics(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6018 | PrintF("Large object space : "); |
| 6019 | lo_space_->ReportStatistics(); |
| 6020 | PrintF(">>>>>> ========================================= >>>>>>\n"); |
| 6021 | } |
| 6022 | |
| 6023 | #endif // DEBUG |
| 6024 | |
| 6025 | bool Heap::Contains(HeapObject* value) { |
| 6026 | return Contains(value->address()); |
| 6027 | } |
| 6028 | |
| 6029 | |
| 6030 | bool Heap::Contains(Address addr) { |
jkummerow@chromium.org | 2c9426b | 2013-09-05 16:31:13 +0000 | [diff] [blame] | 6031 | if (isolate_->memory_allocator()->IsOutsideAllocatedSpace(addr)) return false; |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 6032 | return HasBeenSetUp() && |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 6033 | (new_space_.ToSpaceContains(addr) || |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 6034 | old_pointer_space_->Contains(addr) || |
| 6035 | old_data_space_->Contains(addr) || |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6036 | code_space_->Contains(addr) || |
| 6037 | map_space_->Contains(addr) || |
kasperl@chromium.org | defbd10 | 2009-07-13 14:04:26 +0000 | [diff] [blame] | 6038 | cell_space_->Contains(addr) || |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 6039 | property_cell_space_->Contains(addr) || |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6040 | lo_space_->SlowContains(addr)); |
| 6041 | } |
| 6042 | |
| 6043 | |
| 6044 | bool Heap::InSpace(HeapObject* value, AllocationSpace space) { |
| 6045 | return InSpace(value->address(), space); |
| 6046 | } |
| 6047 | |
| 6048 | |
| 6049 | bool Heap::InSpace(Address addr, AllocationSpace space) { |
jkummerow@chromium.org | 2c9426b | 2013-09-05 16:31:13 +0000 | [diff] [blame] | 6050 | if (isolate_->memory_allocator()->IsOutsideAllocatedSpace(addr)) return false; |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 6051 | if (!HasBeenSetUp()) return false; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6052 | |
| 6053 | switch (space) { |
| 6054 | case NEW_SPACE: |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 6055 | return new_space_.ToSpaceContains(addr); |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 6056 | case OLD_POINTER_SPACE: |
| 6057 | return old_pointer_space_->Contains(addr); |
| 6058 | case OLD_DATA_SPACE: |
| 6059 | return old_data_space_->Contains(addr); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6060 | case CODE_SPACE: |
| 6061 | return code_space_->Contains(addr); |
| 6062 | case MAP_SPACE: |
| 6063 | return map_space_->Contains(addr); |
kasperl@chromium.org | defbd10 | 2009-07-13 14:04:26 +0000 | [diff] [blame] | 6064 | case CELL_SPACE: |
| 6065 | return cell_space_->Contains(addr); |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 6066 | case PROPERTY_CELL_SPACE: |
| 6067 | return property_cell_space_->Contains(addr); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6068 | case LO_SPACE: |
| 6069 | return lo_space_->SlowContains(addr); |
| 6070 | } |
| 6071 | |
| 6072 | return false; |
| 6073 | } |
| 6074 | |
| 6075 | |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 6076 | #ifdef VERIFY_HEAP |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6077 | void Heap::Verify() { |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 6078 | CHECK(HasBeenSetUp()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6079 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 6080 | store_buffer()->Verify(); |
| 6081 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6082 | VerifyPointersVisitor visitor; |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 6083 | IterateRoots(&visitor, VISIT_ONLY_STRONG); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6084 | |
kasperl@chromium.org | defbd10 | 2009-07-13 14:04:26 +0000 | [diff] [blame] | 6085 | new_space_.Verify(); |
| 6086 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 6087 | old_pointer_space_->Verify(&visitor); |
| 6088 | map_space_->Verify(&visitor); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 6089 | |
| 6090 | VerifyPointersVisitor no_dirty_regions_visitor; |
| 6091 | old_data_space_->Verify(&no_dirty_regions_visitor); |
| 6092 | code_space_->Verify(&no_dirty_regions_visitor); |
| 6093 | cell_space_->Verify(&no_dirty_regions_visitor); |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 6094 | property_cell_space_->Verify(&no_dirty_regions_visitor); |
kasperl@chromium.org | defbd10 | 2009-07-13 14:04:26 +0000 | [diff] [blame] | 6095 | |
| 6096 | lo_space_->Verify(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6097 | } |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 6098 | #endif |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6099 | |
| 6100 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 6101 | MaybeObject* Heap::InternalizeUtf8String(Vector<const char> string) { |
| 6102 | Object* result = NULL; |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 6103 | Object* new_table; |
| 6104 | { MaybeObject* maybe_new_table = |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 6105 | string_table()->LookupUtf8String(string, &result); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 6106 | if (!maybe_new_table->ToObject(&new_table)) return maybe_new_table; |
| 6107 | } |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 6108 | // Can't use set_string_table because StringTable::cast knows that |
| 6109 | // StringTable is a singleton and checks for identity. |
| 6110 | roots_[kStringTableRootIndex] = new_table; |
| 6111 | ASSERT(result != NULL); |
| 6112 | return result; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6113 | } |
| 6114 | |
| 6115 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 6116 | MaybeObject* Heap::InternalizeOneByteString(Vector<const uint8_t> string) { |
| 6117 | Object* result = NULL; |
fschneider@chromium.org | 9e3e0b6 | 2011-01-03 10:16:46 +0000 | [diff] [blame] | 6118 | Object* new_table; |
| 6119 | { MaybeObject* maybe_new_table = |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 6120 | string_table()->LookupOneByteString(string, &result); |
fschneider@chromium.org | 9e3e0b6 | 2011-01-03 10:16:46 +0000 | [diff] [blame] | 6121 | if (!maybe_new_table->ToObject(&new_table)) return maybe_new_table; |
| 6122 | } |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 6123 | // Can't use set_string_table because StringTable::cast knows that |
| 6124 | // StringTable is a singleton and checks for identity. |
| 6125 | roots_[kStringTableRootIndex] = new_table; |
| 6126 | ASSERT(result != NULL); |
| 6127 | return result; |
fschneider@chromium.org | 9e3e0b6 | 2011-01-03 10:16:46 +0000 | [diff] [blame] | 6128 | } |
| 6129 | |
| 6130 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 6131 | MaybeObject* Heap::InternalizeOneByteString(Handle<SeqOneByteString> string, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 6132 | int from, |
| 6133 | int length) { |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 6134 | Object* result = NULL; |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 6135 | Object* new_table; |
| 6136 | { MaybeObject* maybe_new_table = |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 6137 | string_table()->LookupSubStringOneByteString(string, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 6138 | from, |
| 6139 | length, |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 6140 | &result); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 6141 | if (!maybe_new_table->ToObject(&new_table)) return maybe_new_table; |
| 6142 | } |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 6143 | // Can't use set_string_table because StringTable::cast knows that |
| 6144 | // StringTable is a singleton and checks for identity. |
| 6145 | roots_[kStringTableRootIndex] = new_table; |
| 6146 | ASSERT(result != NULL); |
| 6147 | return result; |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 6148 | } |
| 6149 | |
| 6150 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 6151 | MaybeObject* Heap::InternalizeTwoByteString(Vector<const uc16> string) { |
| 6152 | Object* result = NULL; |
fschneider@chromium.org | 9e3e0b6 | 2011-01-03 10:16:46 +0000 | [diff] [blame] | 6153 | Object* new_table; |
| 6154 | { MaybeObject* maybe_new_table = |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 6155 | string_table()->LookupTwoByteString(string, &result); |
fschneider@chromium.org | 9e3e0b6 | 2011-01-03 10:16:46 +0000 | [diff] [blame] | 6156 | if (!maybe_new_table->ToObject(&new_table)) return maybe_new_table; |
| 6157 | } |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 6158 | // Can't use set_string_table because StringTable::cast knows that |
| 6159 | // StringTable is a singleton and checks for identity. |
| 6160 | roots_[kStringTableRootIndex] = new_table; |
| 6161 | ASSERT(result != NULL); |
| 6162 | return result; |
fschneider@chromium.org | 9e3e0b6 | 2011-01-03 10:16:46 +0000 | [diff] [blame] | 6163 | } |
| 6164 | |
| 6165 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 6166 | MaybeObject* Heap::InternalizeString(String* string) { |
| 6167 | if (string->IsInternalizedString()) return string; |
| 6168 | Object* result = NULL; |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 6169 | Object* new_table; |
| 6170 | { MaybeObject* maybe_new_table = |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 6171 | string_table()->LookupString(string, &result); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 6172 | if (!maybe_new_table->ToObject(&new_table)) return maybe_new_table; |
| 6173 | } |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 6174 | // Can't use set_string_table because StringTable::cast knows that |
| 6175 | // StringTable is a singleton and checks for identity. |
| 6176 | roots_[kStringTableRootIndex] = new_table; |
| 6177 | ASSERT(result != NULL); |
| 6178 | return result; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6179 | } |
| 6180 | |
| 6181 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 6182 | bool Heap::InternalizeStringIfExists(String* string, String** result) { |
| 6183 | if (string->IsInternalizedString()) { |
| 6184 | *result = string; |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 6185 | return true; |
| 6186 | } |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 6187 | return string_table()->LookupStringIfExists(string, result); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 6188 | } |
| 6189 | |
verwaest@chromium.org | e4ee6de | 2012-11-06 12:13:00 +0000 | [diff] [blame] | 6190 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6191 | void Heap::ZapFromSpace() { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 6192 | NewSpacePageIterator it(new_space_.FromSpaceStart(), |
| 6193 | new_space_.FromSpaceEnd()); |
| 6194 | while (it.has_next()) { |
| 6195 | NewSpacePage* page = it.next(); |
yangguo@chromium.org | ab30bb8 | 2012-02-24 14:41:46 +0000 | [diff] [blame] | 6196 | for (Address cursor = page->area_start(), limit = page->area_end(); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 6197 | cursor < limit; |
| 6198 | cursor += kPointerSize) { |
| 6199 | Memory::Address_at(cursor) = kFromSpaceZapValue; |
| 6200 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6201 | } |
| 6202 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6203 | |
| 6204 | |
ager@chromium.org | 6a2b0aa | 2010-07-13 20:58:03 +0000 | [diff] [blame] | 6205 | void Heap::IterateAndMarkPointersToFromSpace(Address start, |
| 6206 | Address end, |
| 6207 | ObjectSlotCallback callback) { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 6208 | Address slot_address = start; |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 6209 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 6210 | // We are not collecting slots on new space objects during mutation |
| 6211 | // thus we have to scan for pointers to evacuation candidates when we |
| 6212 | // promote objects. But we should not record any slots in non-black |
| 6213 | // objects. Grey object's slots would be rescanned. |
| 6214 | // White object might not survive until the end of collection |
| 6215 | // it would be a violation of the invariant to record it's slots. |
| 6216 | bool record_slots = false; |
| 6217 | if (incremental_marking()->IsCompacting()) { |
| 6218 | MarkBit mark_bit = Marking::MarkBitFrom(HeapObject::FromAddress(start)); |
| 6219 | record_slots = Marking::IsBlack(mark_bit); |
| 6220 | } |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 6221 | |
| 6222 | while (slot_address < end) { |
| 6223 | Object** slot = reinterpret_cast<Object**>(slot_address); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 6224 | Object* object = *slot; |
| 6225 | // If the store buffer becomes overfull we mark pages as being exempt from |
| 6226 | // the store buffer. These pages are scanned to find pointers that point |
| 6227 | // to the new space. In that case we may hit newly promoted objects and |
| 6228 | // fix the pointers before the promotion queue gets to them. Thus the 'if'. |
| 6229 | if (object->IsHeapObject()) { |
| 6230 | if (Heap::InFromSpace(object)) { |
| 6231 | callback(reinterpret_cast<HeapObject**>(slot), |
| 6232 | HeapObject::cast(object)); |
| 6233 | Object* new_object = *slot; |
| 6234 | if (InNewSpace(new_object)) { |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 6235 | SLOW_ASSERT(Heap::InToSpace(new_object)); |
| 6236 | SLOW_ASSERT(new_object->IsHeapObject()); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 6237 | store_buffer_.EnterDirectlyIntoStoreBuffer( |
| 6238 | reinterpret_cast<Address>(slot)); |
| 6239 | } |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 6240 | SLOW_ASSERT(!MarkCompactCollector::IsOnEvacuationCandidate(new_object)); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 6241 | } else if (record_slots && |
| 6242 | MarkCompactCollector::IsOnEvacuationCandidate(object)) { |
| 6243 | mark_compact_collector()->RecordSlot(slot, slot, object); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 6244 | } |
| 6245 | } |
| 6246 | slot_address += kPointerSize; |
| 6247 | } |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 6248 | } |
| 6249 | |
| 6250 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 6251 | #ifdef DEBUG |
| 6252 | typedef bool (*CheckStoreBufferFilter)(Object** addr); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 6253 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 6254 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 6255 | bool IsAMapPointerAddress(Object** addr) { |
| 6256 | uintptr_t a = reinterpret_cast<uintptr_t>(addr); |
| 6257 | int mod = a % Map::kSize; |
| 6258 | return mod >= Map::kPointerFieldsBeginOffset && |
| 6259 | mod < Map::kPointerFieldsEndOffset; |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 6260 | } |
| 6261 | |
| 6262 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 6263 | bool EverythingsAPointer(Object** addr) { |
| 6264 | return true; |
| 6265 | } |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 6266 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 6267 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 6268 | static void CheckStoreBuffer(Heap* heap, |
| 6269 | Object** current, |
| 6270 | Object** limit, |
| 6271 | Object**** store_buffer_position, |
| 6272 | Object*** store_buffer_top, |
| 6273 | CheckStoreBufferFilter filter, |
| 6274 | Address special_garbage_start, |
| 6275 | Address special_garbage_end) { |
| 6276 | Map* free_space_map = heap->free_space_map(); |
| 6277 | for ( ; current < limit; current++) { |
| 6278 | Object* o = *current; |
| 6279 | Address current_address = reinterpret_cast<Address>(current); |
| 6280 | // Skip free space. |
| 6281 | if (o == free_space_map) { |
| 6282 | Address current_address = reinterpret_cast<Address>(current); |
| 6283 | FreeSpace* free_space = |
| 6284 | FreeSpace::cast(HeapObject::FromAddress(current_address)); |
| 6285 | int skip = free_space->Size(); |
| 6286 | ASSERT(current_address + skip <= reinterpret_cast<Address>(limit)); |
| 6287 | ASSERT(skip > 0); |
| 6288 | current_address += skip - kPointerSize; |
| 6289 | current = reinterpret_cast<Object**>(current_address); |
| 6290 | continue; |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 6291 | } |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 6292 | // Skip the current linear allocation space between top and limit which is |
| 6293 | // unmarked with the free space map, but can contain junk. |
| 6294 | if (current_address == special_garbage_start && |
| 6295 | special_garbage_end != special_garbage_start) { |
| 6296 | current_address = special_garbage_end - kPointerSize; |
| 6297 | current = reinterpret_cast<Object**>(current_address); |
| 6298 | continue; |
| 6299 | } |
| 6300 | if (!(*filter)(current)) continue; |
| 6301 | ASSERT(current_address < special_garbage_start || |
| 6302 | current_address >= special_garbage_end); |
| 6303 | ASSERT(reinterpret_cast<uintptr_t>(o) != kFreeListZapValue); |
| 6304 | // We have to check that the pointer does not point into new space |
| 6305 | // without trying to cast it to a heap object since the hash field of |
| 6306 | // a string can contain values like 1 and 3 which are tagged null |
| 6307 | // pointers. |
| 6308 | if (!heap->InNewSpace(o)) continue; |
| 6309 | while (**store_buffer_position < current && |
| 6310 | *store_buffer_position < store_buffer_top) { |
| 6311 | (*store_buffer_position)++; |
| 6312 | } |
| 6313 | if (**store_buffer_position != current || |
| 6314 | *store_buffer_position == store_buffer_top) { |
| 6315 | Object** obj_start = current; |
| 6316 | while (!(*obj_start)->IsMap()) obj_start--; |
| 6317 | UNREACHABLE(); |
| 6318 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6319 | } |
| 6320 | } |
| 6321 | |
| 6322 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 6323 | // Check that the store buffer contains all intergenerational pointers by |
| 6324 | // scanning a page and ensuring that all pointers to young space are in the |
| 6325 | // store buffer. |
| 6326 | void Heap::OldPointerSpaceCheckStoreBuffer() { |
| 6327 | OldSpace* space = old_pointer_space(); |
| 6328 | PageIterator pages(space); |
| 6329 | |
| 6330 | store_buffer()->SortUniq(); |
| 6331 | |
| 6332 | while (pages.has_next()) { |
| 6333 | Page* page = pages.next(); |
yangguo@chromium.org | ab30bb8 | 2012-02-24 14:41:46 +0000 | [diff] [blame] | 6334 | Object** current = reinterpret_cast<Object**>(page->area_start()); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 6335 | |
yangguo@chromium.org | ab30bb8 | 2012-02-24 14:41:46 +0000 | [diff] [blame] | 6336 | Address end = page->area_end(); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 6337 | |
| 6338 | Object*** store_buffer_position = store_buffer()->Start(); |
| 6339 | Object*** store_buffer_top = store_buffer()->Top(); |
| 6340 | |
| 6341 | Object** limit = reinterpret_cast<Object**>(end); |
| 6342 | CheckStoreBuffer(this, |
| 6343 | current, |
| 6344 | limit, |
| 6345 | &store_buffer_position, |
| 6346 | store_buffer_top, |
| 6347 | &EverythingsAPointer, |
| 6348 | space->top(), |
| 6349 | space->limit()); |
| 6350 | } |
| 6351 | } |
| 6352 | |
| 6353 | |
| 6354 | void Heap::MapSpaceCheckStoreBuffer() { |
| 6355 | MapSpace* space = map_space(); |
| 6356 | PageIterator pages(space); |
| 6357 | |
| 6358 | store_buffer()->SortUniq(); |
| 6359 | |
| 6360 | while (pages.has_next()) { |
| 6361 | Page* page = pages.next(); |
yangguo@chromium.org | ab30bb8 | 2012-02-24 14:41:46 +0000 | [diff] [blame] | 6362 | Object** current = reinterpret_cast<Object**>(page->area_start()); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 6363 | |
yangguo@chromium.org | ab30bb8 | 2012-02-24 14:41:46 +0000 | [diff] [blame] | 6364 | Address end = page->area_end(); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 6365 | |
| 6366 | Object*** store_buffer_position = store_buffer()->Start(); |
| 6367 | Object*** store_buffer_top = store_buffer()->Top(); |
| 6368 | |
| 6369 | Object** limit = reinterpret_cast<Object**>(end); |
| 6370 | CheckStoreBuffer(this, |
| 6371 | current, |
| 6372 | limit, |
| 6373 | &store_buffer_position, |
| 6374 | store_buffer_top, |
| 6375 | &IsAMapPointerAddress, |
| 6376 | space->top(), |
| 6377 | space->limit()); |
| 6378 | } |
| 6379 | } |
| 6380 | |
| 6381 | |
| 6382 | void Heap::LargeObjectSpaceCheckStoreBuffer() { |
| 6383 | LargeObjectIterator it(lo_space()); |
| 6384 | for (HeapObject* object = it.Next(); object != NULL; object = it.Next()) { |
| 6385 | // We only have code, sequential strings, or fixed arrays in large |
| 6386 | // object space, and only fixed arrays can possibly contain pointers to |
| 6387 | // the young generation. |
| 6388 | if (object->IsFixedArray()) { |
| 6389 | Object*** store_buffer_position = store_buffer()->Start(); |
| 6390 | Object*** store_buffer_top = store_buffer()->Top(); |
| 6391 | Object** current = reinterpret_cast<Object**>(object->address()); |
| 6392 | Object** limit = |
| 6393 | reinterpret_cast<Object**>(object->address() + object->Size()); |
| 6394 | CheckStoreBuffer(this, |
| 6395 | current, |
| 6396 | limit, |
| 6397 | &store_buffer_position, |
| 6398 | store_buffer_top, |
| 6399 | &EverythingsAPointer, |
| 6400 | NULL, |
| 6401 | NULL); |
| 6402 | } |
| 6403 | } |
| 6404 | } |
| 6405 | #endif |
| 6406 | |
| 6407 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 6408 | void Heap::IterateRoots(ObjectVisitor* v, VisitMode mode) { |
| 6409 | IterateStrongRoots(v, mode); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6410 | IterateWeakRoots(v, mode); |
| 6411 | } |
| 6412 | |
| 6413 | |
| 6414 | void Heap::IterateWeakRoots(ObjectVisitor* v, VisitMode mode) { |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 6415 | v->VisitPointer(reinterpret_cast<Object**>(&roots_[kStringTableRootIndex])); |
| 6416 | v->Synchronize(VisitorSynchronization::kStringTable); |
kmillikin@chromium.org | c53e10d | 2011-05-18 09:12:58 +0000 | [diff] [blame] | 6417 | if (mode != VISIT_ALL_IN_SCAVENGE && |
| 6418 | mode != VISIT_ALL_IN_SWEEP_NEWSPACE) { |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 6419 | // Scavenge collections have special processing for this. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 6420 | external_string_table_.Iterate(v); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 6421 | } |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 6422 | v->Synchronize(VisitorSynchronization::kExternalStringsTable); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6423 | } |
| 6424 | |
| 6425 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 6426 | void Heap::IterateStrongRoots(ObjectVisitor* v, VisitMode mode) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 6427 | v->VisitPointers(&roots_[0], &roots_[kStrongRootListLength]); |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 6428 | v->Synchronize(VisitorSynchronization::kStrongRootList); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6429 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 6430 | v->VisitPointer(BitCast<Object**>(&hidden_string_)); |
| 6431 | v->Synchronize(VisitorSynchronization::kInternalizedString); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6432 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 6433 | isolate_->bootstrapper()->Iterate(v); |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 6434 | v->Synchronize(VisitorSynchronization::kBootstrapper); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 6435 | isolate_->Iterate(v); |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 6436 | v->Synchronize(VisitorSynchronization::kTop); |
jkummerow@chromium.org | 3d00d0a | 2013-09-04 13:57:32 +0000 | [diff] [blame] | 6437 | Relocatable::Iterate(isolate_, v); |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 6438 | v->Synchronize(VisitorSynchronization::kRelocatable); |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 6439 | |
| 6440 | #ifdef ENABLE_DEBUGGER_SUPPORT |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 6441 | isolate_->debug()->Iterate(v); |
ricow@chromium.org | 4f693d6 | 2011-07-04 14:01:31 +0000 | [diff] [blame] | 6442 | if (isolate_->deoptimizer_data() != NULL) { |
| 6443 | isolate_->deoptimizer_data()->Iterate(v); |
| 6444 | } |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 6445 | #endif |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 6446 | v->Synchronize(VisitorSynchronization::kDebug); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 6447 | isolate_->compilation_cache()->Iterate(v); |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 6448 | v->Synchronize(VisitorSynchronization::kCompilationCache); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6449 | |
| 6450 | // Iterate over local handles in handle scopes. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 6451 | isolate_->handle_scope_implementer()->Iterate(v); |
yangguo@chromium.org | 304cc33 | 2012-07-24 07:59:48 +0000 | [diff] [blame] | 6452 | isolate_->IterateDeferredHandles(v); |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 6453 | v->Synchronize(VisitorSynchronization::kHandleScope); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6454 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 6455 | // Iterate over the builtin code objects and code stubs in the |
| 6456 | // heap. Note that it is not necessary to iterate over code objects |
| 6457 | // on scavenge collections. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 6458 | if (mode != VISIT_ALL_IN_SCAVENGE) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 6459 | isolate_->builtins()->IterateBuiltins(v); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 6460 | } |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 6461 | v->Synchronize(VisitorSynchronization::kBuiltins); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6462 | |
| 6463 | // Iterate over global handles. |
kmillikin@chromium.org | c53e10d | 2011-05-18 09:12:58 +0000 | [diff] [blame] | 6464 | switch (mode) { |
| 6465 | case VISIT_ONLY_STRONG: |
| 6466 | isolate_->global_handles()->IterateStrongRoots(v); |
| 6467 | break; |
| 6468 | case VISIT_ALL_IN_SCAVENGE: |
jkummerow@chromium.org | e297f59 | 2011-06-08 10:05:15 +0000 | [diff] [blame] | 6469 | isolate_->global_handles()->IterateNewSpaceStrongAndDependentRoots(v); |
kmillikin@chromium.org | c53e10d | 2011-05-18 09:12:58 +0000 | [diff] [blame] | 6470 | break; |
| 6471 | case VISIT_ALL_IN_SWEEP_NEWSPACE: |
| 6472 | case VISIT_ALL: |
| 6473 | isolate_->global_handles()->IterateAllRoots(v); |
| 6474 | break; |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 6475 | } |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 6476 | v->Synchronize(VisitorSynchronization::kGlobalHandles); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6477 | |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 6478 | // Iterate over eternal handles. |
| 6479 | if (mode == VISIT_ALL_IN_SCAVENGE) { |
| 6480 | isolate_->eternal_handles()->IterateNewSpaceRoots(v); |
| 6481 | } else { |
| 6482 | isolate_->eternal_handles()->IterateAllRoots(v); |
| 6483 | } |
| 6484 | v->Synchronize(VisitorSynchronization::kEternalHandles); |
| 6485 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6486 | // Iterate over pointers being held by inactive threads. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 6487 | isolate_->thread_manager()->Iterate(v); |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 6488 | v->Synchronize(VisitorSynchronization::kThreadManager); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6489 | |
| 6490 | // Iterate over the pointers the Serialization/Deserialization code is |
| 6491 | // holding. |
| 6492 | // During garbage collection this keeps the partial snapshot cache alive. |
| 6493 | // During deserialization of the startup snapshot this creates the partial |
| 6494 | // snapshot cache and deserializes the objects it refers to. During |
| 6495 | // serialization this does nothing, since the partial snapshot cache is |
| 6496 | // empty. However the next thing we do is create the partial snapshot, |
| 6497 | // filling up the partial snapshot cache with objects it needs as we go. |
jkummerow@chromium.org | 3d00d0a | 2013-09-04 13:57:32 +0000 | [diff] [blame] | 6498 | SerializerDeserializer::Iterate(isolate_, v); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6499 | // We don't do a v->Synchronize call here, because in debug mode that will |
| 6500 | // output a flag to the snapshot. However at this point the serializer and |
| 6501 | // deserializer are deliberately a little unsynchronized (see above) so the |
| 6502 | // checking of the sync flag in the snapshot would fail. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6503 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6504 | |
| 6505 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6506 | // TODO(1236194): Since the heap size is configurable on the command line |
| 6507 | // and through the API, we should gracefully handle the case that the heap |
| 6508 | // size is not big enough to fit all the initial objects. |
ager@chromium.org | 01fe7df | 2010-11-10 11:59:11 +0000 | [diff] [blame] | 6509 | bool Heap::ConfigureHeap(int max_semispace_size, |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 6510 | intptr_t max_old_gen_size, |
| 6511 | intptr_t max_executable_size) { |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 6512 | if (HasBeenSetUp()) return false; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6513 | |
yangguo@chromium.org | efdb9d7 | 2012-04-26 08:21:05 +0000 | [diff] [blame] | 6514 | if (FLAG_stress_compaction) { |
| 6515 | // This will cause more frequent GCs when stressing. |
| 6516 | max_semispace_size_ = Page::kPageSize; |
| 6517 | } |
| 6518 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 6519 | if (max_semispace_size > 0) { |
| 6520 | if (max_semispace_size < Page::kPageSize) { |
| 6521 | max_semispace_size = Page::kPageSize; |
| 6522 | if (FLAG_trace_gc) { |
rossberg@chromium.org | 657d53b | 2012-07-12 11:06:03 +0000 | [diff] [blame] | 6523 | PrintPID("Max semispace size cannot be less than %dkbytes\n", |
| 6524 | Page::kPageSize >> 10); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 6525 | } |
| 6526 | } |
| 6527 | max_semispace_size_ = max_semispace_size; |
| 6528 | } |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 6529 | |
| 6530 | if (Snapshot::IsEnabled()) { |
| 6531 | // If we are using a snapshot we always reserve the default amount |
| 6532 | // of memory for each semispace because code in the snapshot has |
| 6533 | // write-barrier code that relies on the size and alignment of new |
| 6534 | // space. We therefore cannot use a larger max semispace size |
| 6535 | // than the default reserved semispace size. |
| 6536 | if (max_semispace_size_ > reserved_semispace_size_) { |
| 6537 | max_semispace_size_ = reserved_semispace_size_; |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 6538 | if (FLAG_trace_gc) { |
rossberg@chromium.org | 657d53b | 2012-07-12 11:06:03 +0000 | [diff] [blame] | 6539 | PrintPID("Max semispace size cannot be more than %dkbytes\n", |
| 6540 | reserved_semispace_size_ >> 10); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 6541 | } |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 6542 | } |
| 6543 | } else { |
| 6544 | // If we are not using snapshots we reserve space for the actual |
| 6545 | // max semispace size. |
| 6546 | reserved_semispace_size_ = max_semispace_size_; |
| 6547 | } |
| 6548 | |
| 6549 | if (max_old_gen_size > 0) max_old_generation_size_ = max_old_gen_size; |
ager@chromium.org | 01fe7df | 2010-11-10 11:59:11 +0000 | [diff] [blame] | 6550 | if (max_executable_size > 0) { |
| 6551 | max_executable_size_ = RoundUp(max_executable_size, Page::kPageSize); |
| 6552 | } |
| 6553 | |
| 6554 | // The max executable size must be less than or equal to the max old |
| 6555 | // generation size. |
| 6556 | if (max_executable_size_ > max_old_generation_size_) { |
| 6557 | max_executable_size_ = max_old_generation_size_; |
| 6558 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6559 | |
| 6560 | // The new space size must be a power of two to support single-bit testing |
| 6561 | // for containment. |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 6562 | max_semispace_size_ = RoundUpToPowerOf2(max_semispace_size_); |
| 6563 | reserved_semispace_size_ = RoundUpToPowerOf2(reserved_semispace_size_); |
| 6564 | initial_semispace_size_ = Min(initial_semispace_size_, max_semispace_size_); |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 6565 | |
| 6566 | // The external allocation limit should be below 256 MB on all architectures |
| 6567 | // to avoid unnecessary low memory notifications, as that is the threshold |
| 6568 | // for some embedders. |
| 6569 | external_allocation_limit_ = 12 * max_semispace_size_; |
| 6570 | ASSERT(external_allocation_limit_ <= 256 * MB); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6571 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 6572 | // The old generation is paged and needs at least one page for each space. |
| 6573 | int paged_space_count = LAST_PAGED_SPACE - FIRST_PAGED_SPACE + 1; |
| 6574 | max_old_generation_size_ = Max(static_cast<intptr_t>(paged_space_count * |
| 6575 | Page::kPageSize), |
| 6576 | RoundUp(max_old_generation_size_, |
| 6577 | Page::kPageSize)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6578 | |
mstarzinger@chromium.org | e900018 | 2013-09-03 11:25:39 +0000 | [diff] [blame] | 6579 | // We rely on being able to allocate new arrays in paged spaces. |
| 6580 | ASSERT(MaxRegularSpaceAllocationSize() >= |
| 6581 | (JSArray::kSize + |
| 6582 | FixedArray::SizeFor(JSObject::kInitialMaxFastElementArray) + |
| 6583 | AllocationMemento::kSize)); |
| 6584 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 6585 | configured_ = true; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6586 | return true; |
| 6587 | } |
| 6588 | |
| 6589 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 6590 | bool Heap::ConfigureHeapDefault() { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 6591 | return ConfigureHeap(static_cast<intptr_t>(FLAG_max_new_space_size / 2) * KB, |
| 6592 | static_cast<intptr_t>(FLAG_max_old_space_size) * MB, |
| 6593 | static_cast<intptr_t>(FLAG_max_executable_size) * MB); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 6594 | } |
| 6595 | |
| 6596 | |
lrn@chromium.org | c4e51ac | 2010-08-09 09:47:21 +0000 | [diff] [blame] | 6597 | void Heap::RecordStats(HeapStats* stats, bool take_snapshot) { |
ricow@chromium.org | 0b9f850 | 2010-08-18 07:45:01 +0000 | [diff] [blame] | 6598 | *stats->start_marker = HeapStats::kStartMarker; |
| 6599 | *stats->end_marker = HeapStats::kEndMarker; |
kmillikin@chromium.org | f05f291 | 2010-09-30 10:07:24 +0000 | [diff] [blame] | 6600 | *stats->new_space_size = new_space_.SizeAsInt(); |
| 6601 | *stats->new_space_capacity = static_cast<int>(new_space_.Capacity()); |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 6602 | *stats->old_pointer_space_size = old_pointer_space_->SizeOfObjects(); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 6603 | *stats->old_pointer_space_capacity = old_pointer_space_->Capacity(); |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 6604 | *stats->old_data_space_size = old_data_space_->SizeOfObjects(); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 6605 | *stats->old_data_space_capacity = old_data_space_->Capacity(); |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 6606 | *stats->code_space_size = code_space_->SizeOfObjects(); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 6607 | *stats->code_space_capacity = code_space_->Capacity(); |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 6608 | *stats->map_space_size = map_space_->SizeOfObjects(); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 6609 | *stats->map_space_capacity = map_space_->Capacity(); |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 6610 | *stats->cell_space_size = cell_space_->SizeOfObjects(); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 6611 | *stats->cell_space_capacity = cell_space_->Capacity(); |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 6612 | *stats->property_cell_space_size = property_cell_space_->SizeOfObjects(); |
| 6613 | *stats->property_cell_space_capacity = property_cell_space_->Capacity(); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 6614 | *stats->lo_space_size = lo_space_->Size(); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 6615 | isolate_->global_handles()->RecordStats(stats); |
| 6616 | *stats->memory_allocator_size = isolate()->memory_allocator()->Size(); |
lrn@chromium.org | c4e51ac | 2010-08-09 09:47:21 +0000 | [diff] [blame] | 6617 | *stats->memory_allocator_capacity = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 6618 | isolate()->memory_allocator()->Size() + |
| 6619 | isolate()->memory_allocator()->Available(); |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 6620 | *stats->os_error = OS::GetLastError(); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 6621 | isolate()->memory_allocator()->Available(); |
lrn@chromium.org | c4e51ac | 2010-08-09 09:47:21 +0000 | [diff] [blame] | 6622 | if (take_snapshot) { |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 6623 | HeapIterator iterator(this); |
lrn@chromium.org | c4e51ac | 2010-08-09 09:47:21 +0000 | [diff] [blame] | 6624 | for (HeapObject* obj = iterator.next(); |
| 6625 | obj != NULL; |
| 6626 | obj = iterator.next()) { |
lrn@chromium.org | c4e51ac | 2010-08-09 09:47:21 +0000 | [diff] [blame] | 6627 | InstanceType type = obj->map()->instance_type(); |
| 6628 | ASSERT(0 <= type && type <= LAST_TYPE); |
| 6629 | stats->objects_per_type[type]++; |
| 6630 | stats->size_per_type[type] += obj->Size(); |
| 6631 | } |
| 6632 | } |
ager@chromium.org | 6012123 | 2009-12-03 11:25:37 +0000 | [diff] [blame] | 6633 | } |
| 6634 | |
| 6635 | |
yangguo@chromium.org | 659ceec | 2012-01-26 07:37:54 +0000 | [diff] [blame] | 6636 | intptr_t Heap::PromotedSpaceSizeOfObjects() { |
| 6637 | return old_pointer_space_->SizeOfObjects() |
| 6638 | + old_data_space_->SizeOfObjects() |
| 6639 | + code_space_->SizeOfObjects() |
| 6640 | + map_space_->SizeOfObjects() |
| 6641 | + cell_space_->SizeOfObjects() |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 6642 | + property_cell_space_->SizeOfObjects() |
yangguo@chromium.org | 659ceec | 2012-01-26 07:37:54 +0000 | [diff] [blame] | 6643 | + lo_space_->SizeOfObjects(); |
| 6644 | } |
| 6645 | |
| 6646 | |
jkummerow@chromium.org | 28faa98 | 2012-04-13 09:58:30 +0000 | [diff] [blame] | 6647 | intptr_t Heap::PromotedExternalMemorySize() { |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 6648 | if (amount_of_external_allocated_memory_ |
| 6649 | <= amount_of_external_allocated_memory_at_last_global_gc_) return 0; |
| 6650 | return amount_of_external_allocated_memory_ |
| 6651 | - amount_of_external_allocated_memory_at_last_global_gc_; |
| 6652 | } |
| 6653 | |
fschneider@chromium.org | 7d10be5 | 2012-04-10 12:30:14 +0000 | [diff] [blame] | 6654 | |
| 6655 | V8_DECLARE_ONCE(initialize_gc_once); |
| 6656 | |
| 6657 | static void InitializeGCOnce() { |
| 6658 | InitializeScavengingVisitorsTables(); |
| 6659 | NewSpaceScavenger::Initialize(); |
| 6660 | MarkCompactCollector::Initialize(); |
| 6661 | } |
| 6662 | |
mstarzinger@chromium.org | e0e1b0d | 2013-07-08 08:38:06 +0000 | [diff] [blame] | 6663 | |
ulan@chromium.org | 09d7ab5 | 2013-02-25 15:50:35 +0000 | [diff] [blame] | 6664 | bool Heap::SetUp() { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 6665 | #ifdef DEBUG |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 6666 | allocation_timeout_ = FLAG_gc_interval; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 6667 | #endif |
| 6668 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6669 | // Initialize heap spaces and initial maps and objects. Whenever something |
| 6670 | // goes wrong, just return false. The caller should check the results and |
| 6671 | // call Heap::TearDown() to release allocated memory. |
| 6672 | // |
ulan@chromium.org | 2efb900 | 2012-01-19 15:36:35 +0000 | [diff] [blame] | 6673 | // If the heap is not yet configured (e.g. through the API), configure it. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6674 | // Configuration is based on the flags new-space-size (really the semispace |
| 6675 | // size) and old-space-size if set or the initial values of semispace_size_ |
| 6676 | // and old_generation_size_ otherwise. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 6677 | if (!configured_) { |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 6678 | if (!ConfigureHeapDefault()) return false; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6679 | } |
| 6680 | |
fschneider@chromium.org | 7d10be5 | 2012-04-10 12:30:14 +0000 | [diff] [blame] | 6681 | CallOnce(&initialize_gc_once, &InitializeGCOnce); |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 6682 | |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 6683 | MarkMapPointersAsEncoded(false); |
| 6684 | |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 6685 | // Set up memory allocator. |
| 6686 | if (!isolate_->memory_allocator()->SetUp(MaxReserved(), MaxExecutableSize())) |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 6687 | return false; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6688 | |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 6689 | // Set up new space. |
| 6690 | if (!new_space_.SetUp(reserved_semispace_size_, max_semispace_size_)) { |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 6691 | return false; |
| 6692 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6693 | |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 6694 | // Initialize old pointer space. |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 6695 | old_pointer_space_ = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 6696 | new OldSpace(this, |
| 6697 | max_old_generation_size_, |
| 6698 | OLD_POINTER_SPACE, |
| 6699 | NOT_EXECUTABLE); |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 6700 | if (old_pointer_space_ == NULL) return false; |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 6701 | if (!old_pointer_space_->SetUp()) return false; |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 6702 | |
| 6703 | // Initialize old data space. |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 6704 | old_data_space_ = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 6705 | new OldSpace(this, |
| 6706 | max_old_generation_size_, |
| 6707 | OLD_DATA_SPACE, |
| 6708 | NOT_EXECUTABLE); |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 6709 | if (old_data_space_ == NULL) return false; |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 6710 | if (!old_data_space_->SetUp()) return false; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6711 | |
| 6712 | // Initialize the code space, set its maximum capacity to the old |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 6713 | // generation size. It needs executable memory. |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 6714 | // On 64-bit platform(s), we put all code objects in a 2 GB range of |
| 6715 | // virtual address space, so that they can call each other with near calls. |
| 6716 | if (code_range_size_ > 0) { |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 6717 | if (!isolate_->code_range()->SetUp(code_range_size_)) { |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 6718 | return false; |
| 6719 | } |
| 6720 | } |
| 6721 | |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 6722 | code_space_ = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 6723 | new OldSpace(this, max_old_generation_size_, CODE_SPACE, EXECUTABLE); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6724 | if (code_space_ == NULL) return false; |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 6725 | if (!code_space_->SetUp()) return false; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6726 | |
| 6727 | // Initialize map space. |
yangguo@chromium.org | 78d1ad4 | 2012-02-09 13:53:47 +0000 | [diff] [blame] | 6728 | map_space_ = new MapSpace(this, max_old_generation_size_, MAP_SPACE); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6729 | if (map_space_ == NULL) return false; |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 6730 | if (!map_space_->SetUp()) return false; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6731 | |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 6732 | // Initialize simple cell space. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 6733 | cell_space_ = new CellSpace(this, max_old_generation_size_, CELL_SPACE); |
kasperl@chromium.org | defbd10 | 2009-07-13 14:04:26 +0000 | [diff] [blame] | 6734 | if (cell_space_ == NULL) return false; |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 6735 | if (!cell_space_->SetUp()) return false; |
kasperl@chromium.org | defbd10 | 2009-07-13 14:04:26 +0000 | [diff] [blame] | 6736 | |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 6737 | // Initialize global property cell space. |
| 6738 | property_cell_space_ = new PropertyCellSpace(this, max_old_generation_size_, |
| 6739 | PROPERTY_CELL_SPACE); |
| 6740 | if (property_cell_space_ == NULL) return false; |
| 6741 | if (!property_cell_space_->SetUp()) return false; |
| 6742 | |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 6743 | // The large object code space may contain code or data. We set the memory |
| 6744 | // to be non-executable here for safety, but this means we need to enable it |
| 6745 | // explicitly when allocating large code objects. |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 6746 | lo_space_ = new LargeObjectSpace(this, max_old_generation_size_, LO_SPACE); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6747 | if (lo_space_ == NULL) return false; |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 6748 | if (!lo_space_->SetUp()) return false; |
rossberg@chromium.org | fab1498 | 2012-01-05 15:02:15 +0000 | [diff] [blame] | 6749 | |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 6750 | // Set up the seed that is used to randomize the string hash function. |
| 6751 | ASSERT(hash_seed() == 0); |
| 6752 | if (FLAG_randomize_hashes) { |
| 6753 | if (FLAG_hash_seed == 0) { |
hpayer@chromium.org | c5d4971 | 2013-09-11 08:25:48 +0000 | [diff] [blame] | 6754 | int rnd = isolate()->random_number_generator()->NextInt(); |
| 6755 | set_hash_seed(Smi::FromInt(rnd & Name::kHashBitMask)); |
rossberg@chromium.org | fab1498 | 2012-01-05 15:02:15 +0000 | [diff] [blame] | 6756 | } else { |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 6757 | set_hash_seed(Smi::FromInt(FLAG_hash_seed)); |
rossberg@chromium.org | fab1498 | 2012-01-05 15:02:15 +0000 | [diff] [blame] | 6758 | } |
| 6759 | } |
| 6760 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 6761 | LOG(isolate_, IntPtrTEvent("heap-capacity", Capacity())); |
| 6762 | LOG(isolate_, IntPtrTEvent("heap-available", Available())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6763 | |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 6764 | store_buffer()->SetUp(); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 6765 | |
jkummerow@chromium.org | dc94e19 | 2013-08-30 11:35:42 +0000 | [diff] [blame] | 6766 | if (FLAG_concurrent_recompilation) relocation_mutex_ = new Mutex; |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 6767 | #ifdef DEBUG |
| 6768 | relocation_mutex_locked_by_optimizer_thread_ = false; |
| 6769 | #endif // DEBUG |
| 6770 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6771 | return true; |
| 6772 | } |
| 6773 | |
mstarzinger@chromium.org | e0e1b0d | 2013-07-08 08:38:06 +0000 | [diff] [blame] | 6774 | |
ulan@chromium.org | 09d7ab5 | 2013-02-25 15:50:35 +0000 | [diff] [blame] | 6775 | bool Heap::CreateHeapObjects() { |
| 6776 | // Create initial maps. |
| 6777 | if (!CreateInitialMaps()) return false; |
| 6778 | if (!CreateApiObjects()) return false; |
| 6779 | |
| 6780 | // Create initial objects |
| 6781 | if (!CreateInitialObjects()) return false; |
| 6782 | |
| 6783 | native_contexts_list_ = undefined_value(); |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 6784 | array_buffers_list_ = undefined_value(); |
jkummerow@chromium.org | ba72ec8 | 2013-07-22 09:21:20 +0000 | [diff] [blame] | 6785 | allocation_sites_list_ = undefined_value(); |
jkummerow@chromium.org | 25b0e21 | 2013-10-04 15:38:52 +0000 | [diff] [blame] | 6786 | weak_object_to_code_table_ = undefined_value(); |
ulan@chromium.org | 09d7ab5 | 2013-02-25 15:50:35 +0000 | [diff] [blame] | 6787 | return true; |
| 6788 | } |
| 6789 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6790 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 6791 | void Heap::SetStackLimits() { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 6792 | ASSERT(isolate_ != NULL); |
| 6793 | ASSERT(isolate_ == isolate()); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 6794 | // On 64 bit machines, pointers are generally out of range of Smis. We write |
| 6795 | // something that looks like an out of range Smi to the GC. |
| 6796 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 6797 | // Set up the special root array entries containing the stack limits. |
| 6798 | // These are actually addresses, but the tag makes the GC ignore it. |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 6799 | roots_[kStackLimitRootIndex] = |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 6800 | reinterpret_cast<Object*>( |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 6801 | (isolate_->stack_guard()->jslimit() & ~kSmiTagMask) | kSmiTag); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 6802 | roots_[kRealStackLimitRootIndex] = |
| 6803 | reinterpret_cast<Object*>( |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 6804 | (isolate_->stack_guard()->real_jslimit() & ~kSmiTagMask) | kSmiTag); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 6805 | } |
| 6806 | |
| 6807 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6808 | void Heap::TearDown() { |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 6809 | #ifdef VERIFY_HEAP |
danno@chromium.org | 1044a4d | 2012-04-30 12:34:39 +0000 | [diff] [blame] | 6810 | if (FLAG_verify_heap) { |
| 6811 | Verify(); |
| 6812 | } |
| 6813 | #endif |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 6814 | |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 6815 | if (FLAG_print_cumulative_gc_stat) { |
mstarzinger@chromium.org | e3b8d0f | 2013-02-01 09:06:41 +0000 | [diff] [blame] | 6816 | PrintF("\n"); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 6817 | PrintF("gc_count=%d ", gc_count_); |
| 6818 | PrintF("mark_sweep_count=%d ", ms_count_); |
yangguo@chromium.org | c03a192 | 2013-02-19 13:55:47 +0000 | [diff] [blame] | 6819 | PrintF("max_gc_pause=%.1f ", get_max_gc_pause()); |
| 6820 | PrintF("total_gc_time=%.1f ", total_gc_time_ms_); |
| 6821 | PrintF("min_in_mutator=%.1f ", get_min_in_mutator()); |
kmillikin@chromium.org | f05f291 | 2010-09-30 10:07:24 +0000 | [diff] [blame] | 6822 | PrintF("max_alive_after_gc=%" V8_PTR_PREFIX "d ", |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 6823 | get_max_alive_after_gc()); |
yangguo@chromium.org | c03a192 | 2013-02-19 13:55:47 +0000 | [diff] [blame] | 6824 | PrintF("total_marking_time=%.1f ", marking_time()); |
| 6825 | PrintF("total_sweeping_time=%.1f ", sweeping_time()); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 6826 | PrintF("\n\n"); |
| 6827 | } |
| 6828 | |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 6829 | TearDownArrayBuffers(); |
| 6830 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 6831 | isolate_->global_handles()->TearDown(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6832 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 6833 | external_string_table_.TearDown(); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 6834 | |
danno@chromium.org | d3c4210 | 2013-08-01 16:58:23 +0000 | [diff] [blame] | 6835 | mark_compact_collector()->TearDown(); |
| 6836 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 6837 | new_space_.TearDown(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6838 | |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 6839 | if (old_pointer_space_ != NULL) { |
| 6840 | old_pointer_space_->TearDown(); |
| 6841 | delete old_pointer_space_; |
| 6842 | old_pointer_space_ = NULL; |
| 6843 | } |
| 6844 | |
| 6845 | if (old_data_space_ != NULL) { |
| 6846 | old_data_space_->TearDown(); |
| 6847 | delete old_data_space_; |
| 6848 | old_data_space_ = NULL; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6849 | } |
| 6850 | |
| 6851 | if (code_space_ != NULL) { |
| 6852 | code_space_->TearDown(); |
| 6853 | delete code_space_; |
| 6854 | code_space_ = NULL; |
| 6855 | } |
| 6856 | |
| 6857 | if (map_space_ != NULL) { |
| 6858 | map_space_->TearDown(); |
| 6859 | delete map_space_; |
| 6860 | map_space_ = NULL; |
| 6861 | } |
| 6862 | |
kasperl@chromium.org | defbd10 | 2009-07-13 14:04:26 +0000 | [diff] [blame] | 6863 | if (cell_space_ != NULL) { |
| 6864 | cell_space_->TearDown(); |
| 6865 | delete cell_space_; |
| 6866 | cell_space_ = NULL; |
| 6867 | } |
| 6868 | |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 6869 | if (property_cell_space_ != NULL) { |
| 6870 | property_cell_space_->TearDown(); |
| 6871 | delete property_cell_space_; |
| 6872 | property_cell_space_ = NULL; |
| 6873 | } |
| 6874 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6875 | if (lo_space_ != NULL) { |
| 6876 | lo_space_->TearDown(); |
| 6877 | delete lo_space_; |
| 6878 | lo_space_ = NULL; |
| 6879 | } |
| 6880 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 6881 | store_buffer()->TearDown(); |
| 6882 | incremental_marking()->TearDown(); |
| 6883 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 6884 | isolate_->memory_allocator()->TearDown(); |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 6885 | |
| 6886 | delete relocation_mutex_; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6887 | } |
| 6888 | |
| 6889 | |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 6890 | void Heap::AddGCPrologueCallback(v8::Isolate::GCPrologueCallback callback, |
| 6891 | GCType gc_type, |
| 6892 | bool pass_isolate) { |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 6893 | ASSERT(callback != NULL); |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 6894 | GCPrologueCallbackPair pair(callback, gc_type, pass_isolate); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 6895 | ASSERT(!gc_prologue_callbacks_.Contains(pair)); |
| 6896 | return gc_prologue_callbacks_.Add(pair); |
| 6897 | } |
| 6898 | |
| 6899 | |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 6900 | void Heap::RemoveGCPrologueCallback(v8::Isolate::GCPrologueCallback callback) { |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 6901 | ASSERT(callback != NULL); |
| 6902 | for (int i = 0; i < gc_prologue_callbacks_.length(); ++i) { |
| 6903 | if (gc_prologue_callbacks_[i].callback == callback) { |
| 6904 | gc_prologue_callbacks_.Remove(i); |
| 6905 | return; |
| 6906 | } |
| 6907 | } |
| 6908 | UNREACHABLE(); |
| 6909 | } |
| 6910 | |
| 6911 | |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 6912 | void Heap::AddGCEpilogueCallback(v8::Isolate::GCEpilogueCallback callback, |
| 6913 | GCType gc_type, |
| 6914 | bool pass_isolate) { |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 6915 | ASSERT(callback != NULL); |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 6916 | GCEpilogueCallbackPair pair(callback, gc_type, pass_isolate); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 6917 | ASSERT(!gc_epilogue_callbacks_.Contains(pair)); |
| 6918 | return gc_epilogue_callbacks_.Add(pair); |
| 6919 | } |
| 6920 | |
| 6921 | |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 6922 | void Heap::RemoveGCEpilogueCallback(v8::Isolate::GCEpilogueCallback callback) { |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 6923 | ASSERT(callback != NULL); |
| 6924 | for (int i = 0; i < gc_epilogue_callbacks_.length(); ++i) { |
| 6925 | if (gc_epilogue_callbacks_[i].callback == callback) { |
| 6926 | gc_epilogue_callbacks_.Remove(i); |
| 6927 | return; |
| 6928 | } |
| 6929 | } |
| 6930 | UNREACHABLE(); |
| 6931 | } |
| 6932 | |
| 6933 | |
jkummerow@chromium.org | 25b0e21 | 2013-10-04 15:38:52 +0000 | [diff] [blame] | 6934 | MaybeObject* Heap::AddWeakObjectToCodeDependency(Object* obj, |
| 6935 | DependentCode* dep) { |
| 6936 | ASSERT(!InNewSpace(obj)); |
| 6937 | ASSERT(!InNewSpace(dep)); |
| 6938 | MaybeObject* maybe_obj = |
| 6939 | WeakHashTable::cast(weak_object_to_code_table_)->Put(obj, dep); |
| 6940 | WeakHashTable* table; |
| 6941 | if (!maybe_obj->To(&table)) return maybe_obj; |
mvstanton@chromium.org | dd6d9ee | 2013-10-11 10:35:37 +0000 | [diff] [blame] | 6942 | if (ShouldZapGarbage() && weak_object_to_code_table_ != table) { |
| 6943 | WeakHashTable::cast(weak_object_to_code_table_)->Zap(the_hole_value()); |
| 6944 | } |
jkummerow@chromium.org | 25b0e21 | 2013-10-04 15:38:52 +0000 | [diff] [blame] | 6945 | set_weak_object_to_code_table(table); |
| 6946 | ASSERT_EQ(dep, WeakHashTable::cast(weak_object_to_code_table_)->Lookup(obj)); |
| 6947 | return weak_object_to_code_table_; |
| 6948 | } |
| 6949 | |
| 6950 | |
| 6951 | DependentCode* Heap::LookupWeakObjectToCodeDependency(Object* obj) { |
| 6952 | Object* dep = WeakHashTable::cast(weak_object_to_code_table_)->Lookup(obj); |
| 6953 | if (dep->IsDependentCode()) return DependentCode::cast(dep); |
| 6954 | return DependentCode::cast(empty_fixed_array()); |
| 6955 | } |
| 6956 | |
| 6957 | |
| 6958 | void Heap::EnsureWeakObjectToCodeTable() { |
| 6959 | if (!weak_object_to_code_table()->IsHashTable()) { |
| 6960 | set_weak_object_to_code_table(*isolate()->factory()->NewWeakHashTable(16)); |
| 6961 | } |
| 6962 | } |
| 6963 | |
| 6964 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6965 | #ifdef DEBUG |
| 6966 | |
| 6967 | class PrintHandleVisitor: public ObjectVisitor { |
| 6968 | public: |
| 6969 | void VisitPointers(Object** start, Object** end) { |
| 6970 | for (Object** p = start; p < end; p++) |
kmillikin@chromium.org | f05f291 | 2010-09-30 10:07:24 +0000 | [diff] [blame] | 6971 | PrintF(" handle %p to %p\n", |
| 6972 | reinterpret_cast<void*>(p), |
| 6973 | reinterpret_cast<void*>(*p)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6974 | } |
| 6975 | }; |
| 6976 | |
mstarzinger@chromium.org | e0e1b0d | 2013-07-08 08:38:06 +0000 | [diff] [blame] | 6977 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6978 | void Heap::PrintHandles() { |
| 6979 | PrintF("Handles:\n"); |
| 6980 | PrintHandleVisitor v; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 6981 | isolate_->handle_scope_implementer()->Iterate(&v); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6982 | } |
| 6983 | |
| 6984 | #endif |
| 6985 | |
| 6986 | |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 6987 | Space* AllSpaces::next() { |
| 6988 | switch (counter_++) { |
| 6989 | case NEW_SPACE: |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 6990 | return heap_->new_space(); |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 6991 | case OLD_POINTER_SPACE: |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 6992 | return heap_->old_pointer_space(); |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 6993 | case OLD_DATA_SPACE: |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 6994 | return heap_->old_data_space(); |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 6995 | case CODE_SPACE: |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 6996 | return heap_->code_space(); |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 6997 | case MAP_SPACE: |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 6998 | return heap_->map_space(); |
kasperl@chromium.org | defbd10 | 2009-07-13 14:04:26 +0000 | [diff] [blame] | 6999 | case CELL_SPACE: |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 7000 | return heap_->cell_space(); |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 7001 | case PROPERTY_CELL_SPACE: |
| 7002 | return heap_->property_cell_space(); |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 7003 | case LO_SPACE: |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 7004 | return heap_->lo_space(); |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 7005 | default: |
| 7006 | return NULL; |
| 7007 | } |
| 7008 | } |
| 7009 | |
| 7010 | |
| 7011 | PagedSpace* PagedSpaces::next() { |
| 7012 | switch (counter_++) { |
| 7013 | case OLD_POINTER_SPACE: |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 7014 | return heap_->old_pointer_space(); |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 7015 | case OLD_DATA_SPACE: |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 7016 | return heap_->old_data_space(); |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 7017 | case CODE_SPACE: |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 7018 | return heap_->code_space(); |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 7019 | case MAP_SPACE: |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 7020 | return heap_->map_space(); |
kasperl@chromium.org | defbd10 | 2009-07-13 14:04:26 +0000 | [diff] [blame] | 7021 | case CELL_SPACE: |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 7022 | return heap_->cell_space(); |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 7023 | case PROPERTY_CELL_SPACE: |
| 7024 | return heap_->property_cell_space(); |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 7025 | default: |
| 7026 | return NULL; |
| 7027 | } |
| 7028 | } |
| 7029 | |
| 7030 | |
| 7031 | |
| 7032 | OldSpace* OldSpaces::next() { |
| 7033 | switch (counter_++) { |
| 7034 | case OLD_POINTER_SPACE: |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 7035 | return heap_->old_pointer_space(); |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 7036 | case OLD_DATA_SPACE: |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 7037 | return heap_->old_data_space(); |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 7038 | case CODE_SPACE: |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 7039 | return heap_->code_space(); |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 7040 | default: |
| 7041 | return NULL; |
| 7042 | } |
| 7043 | } |
| 7044 | |
| 7045 | |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 7046 | SpaceIterator::SpaceIterator(Heap* heap) |
| 7047 | : heap_(heap), |
| 7048 | current_space_(FIRST_SPACE), |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 7049 | iterator_(NULL), |
| 7050 | size_func_(NULL) { |
| 7051 | } |
| 7052 | |
| 7053 | |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 7054 | SpaceIterator::SpaceIterator(Heap* heap, HeapObjectCallback size_func) |
| 7055 | : heap_(heap), |
| 7056 | current_space_(FIRST_SPACE), |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 7057 | iterator_(NULL), |
| 7058 | size_func_(size_func) { |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 7059 | } |
| 7060 | |
| 7061 | |
| 7062 | SpaceIterator::~SpaceIterator() { |
| 7063 | // Delete active iterator if any. |
| 7064 | delete iterator_; |
| 7065 | } |
| 7066 | |
| 7067 | |
| 7068 | bool SpaceIterator::has_next() { |
| 7069 | // Iterate until no more spaces. |
| 7070 | return current_space_ != LAST_SPACE; |
| 7071 | } |
| 7072 | |
| 7073 | |
| 7074 | ObjectIterator* SpaceIterator::next() { |
| 7075 | if (iterator_ != NULL) { |
| 7076 | delete iterator_; |
| 7077 | iterator_ = NULL; |
| 7078 | // Move to the next space |
| 7079 | current_space_++; |
| 7080 | if (current_space_ > LAST_SPACE) { |
| 7081 | return NULL; |
| 7082 | } |
| 7083 | } |
| 7084 | |
| 7085 | // Return iterator for the new current space. |
| 7086 | return CreateIterator(); |
| 7087 | } |
| 7088 | |
| 7089 | |
| 7090 | // Create an iterator for the space to iterate. |
| 7091 | ObjectIterator* SpaceIterator::CreateIterator() { |
| 7092 | ASSERT(iterator_ == NULL); |
| 7093 | |
| 7094 | switch (current_space_) { |
| 7095 | case NEW_SPACE: |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 7096 | iterator_ = new SemiSpaceIterator(heap_->new_space(), size_func_); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 7097 | break; |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 7098 | case OLD_POINTER_SPACE: |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 7099 | iterator_ = |
| 7100 | new HeapObjectIterator(heap_->old_pointer_space(), size_func_); |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 7101 | break; |
| 7102 | case OLD_DATA_SPACE: |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 7103 | iterator_ = new HeapObjectIterator(heap_->old_data_space(), size_func_); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 7104 | break; |
| 7105 | case CODE_SPACE: |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 7106 | iterator_ = new HeapObjectIterator(heap_->code_space(), size_func_); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 7107 | break; |
| 7108 | case MAP_SPACE: |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 7109 | iterator_ = new HeapObjectIterator(heap_->map_space(), size_func_); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 7110 | break; |
kasperl@chromium.org | defbd10 | 2009-07-13 14:04:26 +0000 | [diff] [blame] | 7111 | case CELL_SPACE: |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 7112 | iterator_ = new HeapObjectIterator(heap_->cell_space(), size_func_); |
kasperl@chromium.org | defbd10 | 2009-07-13 14:04:26 +0000 | [diff] [blame] | 7113 | break; |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 7114 | case PROPERTY_CELL_SPACE: |
| 7115 | iterator_ = new HeapObjectIterator(heap_->property_cell_space(), |
| 7116 | size_func_); |
| 7117 | break; |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 7118 | case LO_SPACE: |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 7119 | iterator_ = new LargeObjectIterator(heap_->lo_space(), size_func_); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 7120 | break; |
| 7121 | } |
| 7122 | |
| 7123 | // Return the newly allocated iterator; |
| 7124 | ASSERT(iterator_ != NULL); |
| 7125 | return iterator_; |
| 7126 | } |
| 7127 | |
| 7128 | |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 7129 | class HeapObjectsFilter { |
| 7130 | public: |
| 7131 | virtual ~HeapObjectsFilter() {} |
| 7132 | virtual bool SkipObject(HeapObject* object) = 0; |
| 7133 | }; |
| 7134 | |
| 7135 | |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 7136 | class UnreachableObjectsFilter : public HeapObjectsFilter { |
| 7137 | public: |
jkummerow@chromium.org | 3d00d0a | 2013-09-04 13:57:32 +0000 | [diff] [blame] | 7138 | explicit UnreachableObjectsFilter(Heap* heap) : heap_(heap) { |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 7139 | MarkReachableObjects(); |
| 7140 | } |
| 7141 | |
| 7142 | ~UnreachableObjectsFilter() { |
jkummerow@chromium.org | 3d00d0a | 2013-09-04 13:57:32 +0000 | [diff] [blame] | 7143 | heap_->mark_compact_collector()->ClearMarkbits(); |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 7144 | } |
| 7145 | |
| 7146 | bool SkipObject(HeapObject* object) { |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 7147 | MarkBit mark_bit = Marking::MarkBitFrom(object); |
| 7148 | return !mark_bit.Get(); |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 7149 | } |
| 7150 | |
| 7151 | private: |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 7152 | class MarkingVisitor : public ObjectVisitor { |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 7153 | public: |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 7154 | MarkingVisitor() : marking_stack_(10) {} |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 7155 | |
| 7156 | void VisitPointers(Object** start, Object** end) { |
| 7157 | for (Object** p = start; p < end; p++) { |
| 7158 | if (!(*p)->IsHeapObject()) continue; |
| 7159 | HeapObject* obj = HeapObject::cast(*p); |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 7160 | MarkBit mark_bit = Marking::MarkBitFrom(obj); |
| 7161 | if (!mark_bit.Get()) { |
| 7162 | mark_bit.Set(); |
| 7163 | marking_stack_.Add(obj); |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 7164 | } |
| 7165 | } |
| 7166 | } |
| 7167 | |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 7168 | void TransitiveClosure() { |
| 7169 | while (!marking_stack_.is_empty()) { |
| 7170 | HeapObject* obj = marking_stack_.RemoveLast(); |
| 7171 | obj->Iterate(this); |
| 7172 | } |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 7173 | } |
| 7174 | |
| 7175 | private: |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 7176 | List<HeapObject*> marking_stack_; |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 7177 | }; |
| 7178 | |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 7179 | void MarkReachableObjects() { |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 7180 | MarkingVisitor visitor; |
jkummerow@chromium.org | 3d00d0a | 2013-09-04 13:57:32 +0000 | [diff] [blame] | 7181 | heap_->IterateRoots(&visitor, VISIT_ALL); |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 7182 | visitor.TransitiveClosure(); |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 7183 | } |
| 7184 | |
jkummerow@chromium.org | 3d00d0a | 2013-09-04 13:57:32 +0000 | [diff] [blame] | 7185 | Heap* heap_; |
rossberg@chromium.org | 79e7902 | 2013-06-03 15:43:46 +0000 | [diff] [blame] | 7186 | DisallowHeapAllocation no_allocation_; |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 7187 | }; |
| 7188 | |
| 7189 | |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 7190 | HeapIterator::HeapIterator(Heap* heap) |
| 7191 | : heap_(heap), |
| 7192 | filtering_(HeapIterator::kNoFiltering), |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 7193 | filter_(NULL) { |
| 7194 | Init(); |
| 7195 | } |
| 7196 | |
| 7197 | |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 7198 | HeapIterator::HeapIterator(Heap* heap, |
| 7199 | HeapIterator::HeapObjectsFiltering filtering) |
| 7200 | : heap_(heap), |
| 7201 | filtering_(filtering), |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 7202 | filter_(NULL) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7203 | Init(); |
| 7204 | } |
| 7205 | |
| 7206 | |
| 7207 | HeapIterator::~HeapIterator() { |
| 7208 | Shutdown(); |
| 7209 | } |
| 7210 | |
| 7211 | |
| 7212 | void HeapIterator::Init() { |
| 7213 | // Start the iteration. |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 7214 | space_iterator_ = new SpaceIterator(heap_); |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 7215 | switch (filtering_) { |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 7216 | case kFilterUnreachable: |
jkummerow@chromium.org | 3d00d0a | 2013-09-04 13:57:32 +0000 | [diff] [blame] | 7217 | filter_ = new UnreachableObjectsFilter(heap_); |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 7218 | break; |
| 7219 | default: |
| 7220 | break; |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 7221 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7222 | object_iterator_ = space_iterator_->next(); |
| 7223 | } |
| 7224 | |
| 7225 | |
| 7226 | void HeapIterator::Shutdown() { |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 7227 | #ifdef DEBUG |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 7228 | // Assert that in filtering mode we have iterated through all |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 7229 | // objects. Otherwise, heap will be left in an inconsistent state. |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 7230 | if (filtering_ != kNoFiltering) { |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 7231 | ASSERT(object_iterator_ == NULL); |
| 7232 | } |
| 7233 | #endif |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7234 | // Make sure the last iterator is deallocated. |
| 7235 | delete space_iterator_; |
| 7236 | space_iterator_ = NULL; |
| 7237 | object_iterator_ = NULL; |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 7238 | delete filter_; |
| 7239 | filter_ = NULL; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7240 | } |
| 7241 | |
| 7242 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 7243 | HeapObject* HeapIterator::next() { |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 7244 | if (filter_ == NULL) return NextObject(); |
| 7245 | |
| 7246 | HeapObject* obj = NextObject(); |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 7247 | while (obj != NULL && filter_->SkipObject(obj)) obj = NextObject(); |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 7248 | return obj; |
| 7249 | } |
| 7250 | |
| 7251 | |
| 7252 | HeapObject* HeapIterator::NextObject() { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7253 | // No iterator means we are done. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 7254 | if (object_iterator_ == NULL) return NULL; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7255 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 7256 | if (HeapObject* obj = object_iterator_->next_object()) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7257 | // If the current iterator has more objects we are fine. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 7258 | return obj; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7259 | } else { |
| 7260 | // Go though the spaces looking for one that has objects. |
| 7261 | while (space_iterator_->has_next()) { |
| 7262 | object_iterator_ = space_iterator_->next(); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 7263 | if (HeapObject* obj = object_iterator_->next_object()) { |
| 7264 | return obj; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7265 | } |
| 7266 | } |
| 7267 | } |
| 7268 | // Done with the last space. |
| 7269 | object_iterator_ = NULL; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 7270 | return NULL; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7271 | } |
| 7272 | |
| 7273 | |
| 7274 | void HeapIterator::reset() { |
| 7275 | // Restart the iterator. |
| 7276 | Shutdown(); |
| 7277 | Init(); |
| 7278 | } |
| 7279 | |
| 7280 | |
yangguo@chromium.org | 46a2a51 | 2013-01-18 16:29:40 +0000 | [diff] [blame] | 7281 | #ifdef DEBUG |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7282 | |
jkummerow@chromium.org | ba72ec8 | 2013-07-22 09:21:20 +0000 | [diff] [blame] | 7283 | Object* const PathTracer::kAnyGlobalObject = NULL; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7284 | |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 7285 | class PathTracer::MarkVisitor: public ObjectVisitor { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7286 | public: |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 7287 | explicit MarkVisitor(PathTracer* tracer) : tracer_(tracer) {} |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7288 | void VisitPointers(Object** start, Object** end) { |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 7289 | // Scan all HeapObject pointers in [start, end) |
| 7290 | for (Object** p = start; !tracer_->found() && (p < end); p++) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7291 | if ((*p)->IsHeapObject()) |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 7292 | tracer_->MarkRecursively(p, this); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7293 | } |
| 7294 | } |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 7295 | |
| 7296 | private: |
| 7297 | PathTracer* tracer_; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7298 | }; |
| 7299 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7300 | |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 7301 | class PathTracer::UnmarkVisitor: public ObjectVisitor { |
| 7302 | public: |
| 7303 | explicit UnmarkVisitor(PathTracer* tracer) : tracer_(tracer) {} |
| 7304 | void VisitPointers(Object** start, Object** end) { |
| 7305 | // Scan all HeapObject pointers in [start, end) |
| 7306 | for (Object** p = start; p < end; p++) { |
| 7307 | if ((*p)->IsHeapObject()) |
| 7308 | tracer_->UnmarkRecursively(p, this); |
| 7309 | } |
| 7310 | } |
| 7311 | |
| 7312 | private: |
| 7313 | PathTracer* tracer_; |
| 7314 | }; |
| 7315 | |
| 7316 | |
| 7317 | void PathTracer::VisitPointers(Object** start, Object** end) { |
| 7318 | bool done = ((what_to_find_ == FIND_FIRST) && found_target_); |
| 7319 | // Visit all HeapObject pointers in [start, end) |
| 7320 | for (Object** p = start; !done && (p < end); p++) { |
| 7321 | if ((*p)->IsHeapObject()) { |
| 7322 | TracePathFrom(p); |
| 7323 | done = ((what_to_find_ == FIND_FIRST) && found_target_); |
| 7324 | } |
| 7325 | } |
| 7326 | } |
| 7327 | |
| 7328 | |
| 7329 | void PathTracer::Reset() { |
| 7330 | found_target_ = false; |
| 7331 | object_stack_.Clear(); |
| 7332 | } |
| 7333 | |
| 7334 | |
| 7335 | void PathTracer::TracePathFrom(Object** root) { |
| 7336 | ASSERT((search_target_ == kAnyGlobalObject) || |
| 7337 | search_target_->IsHeapObject()); |
| 7338 | found_target_in_trace_ = false; |
yangguo@chromium.org | 5a11aaf | 2012-06-20 11:29:00 +0000 | [diff] [blame] | 7339 | Reset(); |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 7340 | |
| 7341 | MarkVisitor mark_visitor(this); |
| 7342 | MarkRecursively(root, &mark_visitor); |
| 7343 | |
| 7344 | UnmarkVisitor unmark_visitor(this); |
| 7345 | UnmarkRecursively(root, &unmark_visitor); |
| 7346 | |
| 7347 | ProcessResults(); |
| 7348 | } |
| 7349 | |
| 7350 | |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 7351 | static bool SafeIsNativeContext(HeapObject* obj) { |
| 7352 | return obj->map() == obj->GetHeap()->raw_unchecked_native_context_map(); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 7353 | } |
| 7354 | |
| 7355 | |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 7356 | void PathTracer::MarkRecursively(Object** p, MarkVisitor* mark_visitor) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7357 | if (!(*p)->IsHeapObject()) return; |
| 7358 | |
| 7359 | HeapObject* obj = HeapObject::cast(*p); |
| 7360 | |
| 7361 | Object* map = obj->map(); |
| 7362 | |
| 7363 | if (!map->IsHeapObject()) return; // visited before |
| 7364 | |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 7365 | if (found_target_in_trace_) return; // stop if target found |
| 7366 | object_stack_.Add(obj); |
| 7367 | if (((search_target_ == kAnyGlobalObject) && obj->IsJSGlobalObject()) || |
| 7368 | (obj == search_target_)) { |
| 7369 | found_target_in_trace_ = true; |
| 7370 | found_target_ = true; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7371 | return; |
| 7372 | } |
| 7373 | |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 7374 | bool is_native_context = SafeIsNativeContext(obj); |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 7375 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7376 | // not visited yet |
| 7377 | Map* map_p = reinterpret_cast<Map*>(HeapObject::cast(map)); |
| 7378 | |
| 7379 | Address map_addr = map_p->address(); |
| 7380 | |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 7381 | obj->set_map_no_write_barrier(reinterpret_cast<Map*>(map_addr + kMarkTag)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7382 | |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 7383 | // Scan the object body. |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 7384 | if (is_native_context && (visit_mode_ == VISIT_ONLY_STRONG)) { |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 7385 | // This is specialized to scan Context's properly. |
danno@chromium.org | 2ab0c3b | 2012-10-05 08:50:56 +0000 | [diff] [blame] | 7386 | Object** start = reinterpret_cast<Object**>(obj->address() + |
| 7387 | Context::kHeaderSize); |
| 7388 | Object** end = reinterpret_cast<Object**>(obj->address() + |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 7389 | Context::kHeaderSize + Context::FIRST_WEAK_SLOT * kPointerSize); |
danno@chromium.org | 2ab0c3b | 2012-10-05 08:50:56 +0000 | [diff] [blame] | 7390 | mark_visitor->VisitPointers(start, end); |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 7391 | } else { |
| 7392 | obj->IterateBody(map_p->instance_type(), |
| 7393 | obj->SizeFromMap(map_p), |
| 7394 | mark_visitor); |
| 7395 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7396 | |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 7397 | // Scan the map after the body because the body is a lot more interesting |
| 7398 | // when doing leak detection. |
| 7399 | MarkRecursively(&map, mark_visitor); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7400 | |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 7401 | if (!found_target_in_trace_) // don't pop if found the target |
| 7402 | object_stack_.RemoveLast(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7403 | } |
| 7404 | |
| 7405 | |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 7406 | void PathTracer::UnmarkRecursively(Object** p, UnmarkVisitor* unmark_visitor) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7407 | if (!(*p)->IsHeapObject()) return; |
| 7408 | |
| 7409 | HeapObject* obj = HeapObject::cast(*p); |
| 7410 | |
| 7411 | Object* map = obj->map(); |
| 7412 | |
| 7413 | if (map->IsHeapObject()) return; // unmarked already |
| 7414 | |
| 7415 | Address map_addr = reinterpret_cast<Address>(map); |
| 7416 | |
| 7417 | map_addr -= kMarkTag; |
| 7418 | |
| 7419 | ASSERT_TAG_ALIGNED(map_addr); |
| 7420 | |
| 7421 | HeapObject* map_p = HeapObject::FromAddress(map_addr); |
| 7422 | |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 7423 | obj->set_map_no_write_barrier(reinterpret_cast<Map*>(map_p)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7424 | |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 7425 | UnmarkRecursively(reinterpret_cast<Object**>(&map_p), unmark_visitor); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7426 | |
| 7427 | obj->IterateBody(Map::cast(map_p)->instance_type(), |
| 7428 | obj->SizeFromMap(Map::cast(map_p)), |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 7429 | unmark_visitor); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7430 | } |
| 7431 | |
| 7432 | |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 7433 | void PathTracer::ProcessResults() { |
| 7434 | if (found_target_) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7435 | PrintF("=====================================\n"); |
| 7436 | PrintF("==== Path to object ====\n"); |
| 7437 | PrintF("=====================================\n\n"); |
| 7438 | |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 7439 | ASSERT(!object_stack_.is_empty()); |
| 7440 | for (int i = 0; i < object_stack_.length(); i++) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7441 | if (i > 0) PrintF("\n |\n |\n V\n\n"); |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 7442 | Object* obj = object_stack_[i]; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7443 | obj->Print(); |
| 7444 | } |
| 7445 | PrintF("=====================================\n"); |
| 7446 | } |
| 7447 | } |
| 7448 | |
| 7449 | |
ulan@chromium.org | ea52b5f | 2012-07-30 13:05:33 +0000 | [diff] [blame] | 7450 | // Triggers a depth-first traversal of reachable objects from one |
| 7451 | // given root object and finds a path to a specific heap object and |
| 7452 | // prints it. |
| 7453 | void Heap::TracePathToObjectFrom(Object* target, Object* root) { |
| 7454 | PathTracer tracer(target, PathTracer::FIND_ALL, VISIT_ALL); |
| 7455 | tracer.VisitPointer(&root); |
| 7456 | } |
| 7457 | |
| 7458 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7459 | // Triggers a depth-first traversal of reachable objects from roots |
| 7460 | // and finds a path to a specific heap object and prints it. |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 7461 | void Heap::TracePathToObject(Object* target) { |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 7462 | PathTracer tracer(target, PathTracer::FIND_ALL, VISIT_ALL); |
| 7463 | IterateRoots(&tracer, VISIT_ONLY_STRONG); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7464 | } |
| 7465 | |
| 7466 | |
| 7467 | // Triggers a depth-first traversal of reachable objects from roots |
| 7468 | // and finds a path to any global object and prints it. Useful for |
| 7469 | // determining the source for leaks of global objects. |
| 7470 | void Heap::TracePathToGlobal() { |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 7471 | PathTracer tracer(PathTracer::kAnyGlobalObject, |
| 7472 | PathTracer::FIND_ALL, |
| 7473 | VISIT_ALL); |
| 7474 | IterateRoots(&tracer, VISIT_ONLY_STRONG); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7475 | } |
| 7476 | #endif |
| 7477 | |
| 7478 | |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 7479 | static intptr_t CountTotalHolesSize(Heap* heap) { |
kmillikin@chromium.org | f05f291 | 2010-09-30 10:07:24 +0000 | [diff] [blame] | 7480 | intptr_t holes_size = 0; |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 7481 | OldSpaces spaces(heap); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 7482 | for (OldSpace* space = spaces.next(); |
| 7483 | space != NULL; |
| 7484 | space = spaces.next()) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 7485 | holes_size += space->Waste() + space->Available(); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 7486 | } |
| 7487 | return holes_size; |
| 7488 | } |
| 7489 | |
| 7490 | |
rossberg@chromium.org | 994edf6 | 2012-02-06 10:12:55 +0000 | [diff] [blame] | 7491 | GCTracer::GCTracer(Heap* heap, |
| 7492 | const char* gc_reason, |
| 7493 | const char* collector_reason) |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 7494 | : start_time_(0.0), |
jkummerow@chromium.org | 1145ef8 | 2012-02-02 16:21:15 +0000 | [diff] [blame] | 7495 | start_object_size_(0), |
| 7496 | start_memory_size_(0), |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 7497 | gc_count_(0), |
| 7498 | full_gc_count_(0), |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 7499 | allocated_since_last_gc_(0), |
| 7500 | spent_in_mutator_(0), |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 7501 | promoted_objects_size_(0), |
rossberg@chromium.org | cddc71f | 2012-12-07 12:40:13 +0000 | [diff] [blame] | 7502 | nodes_died_in_new_space_(0), |
| 7503 | nodes_copied_in_new_space_(0), |
| 7504 | nodes_promoted_(0), |
rossberg@chromium.org | 994edf6 | 2012-02-06 10:12:55 +0000 | [diff] [blame] | 7505 | heap_(heap), |
| 7506 | gc_reason_(gc_reason), |
| 7507 | collector_reason_(collector_reason) { |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 7508 | if (!FLAG_trace_gc && !FLAG_print_cumulative_gc_stat) return; |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 7509 | start_time_ = OS::TimeCurrentMillis(); |
jkummerow@chromium.org | 1145ef8 | 2012-02-02 16:21:15 +0000 | [diff] [blame] | 7510 | start_object_size_ = heap_->SizeOfObjects(); |
| 7511 | start_memory_size_ = heap_->isolate()->memory_allocator()->Size(); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 7512 | |
| 7513 | for (int i = 0; i < Scope::kNumberOfScopes; i++) { |
| 7514 | scopes_[i] = 0; |
| 7515 | } |
| 7516 | |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 7517 | in_free_list_or_wasted_before_gc_ = CountTotalHolesSize(heap); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 7518 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 7519 | allocated_since_last_gc_ = |
| 7520 | heap_->SizeOfObjects() - heap_->alive_after_last_gc_; |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 7521 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 7522 | if (heap_->last_gc_end_timestamp_ > 0) { |
| 7523 | spent_in_mutator_ = Max(start_time_ - heap_->last_gc_end_timestamp_, 0.0); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 7524 | } |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 7525 | |
| 7526 | steps_count_ = heap_->incremental_marking()->steps_count(); |
| 7527 | steps_took_ = heap_->incremental_marking()->steps_took(); |
| 7528 | longest_step_ = heap_->incremental_marking()->longest_step(); |
| 7529 | steps_count_since_last_gc_ = |
| 7530 | heap_->incremental_marking()->steps_count_since_last_gc(); |
| 7531 | steps_took_since_last_gc_ = |
| 7532 | heap_->incremental_marking()->steps_took_since_last_gc(); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 7533 | } |
| 7534 | |
| 7535 | |
| 7536 | GCTracer::~GCTracer() { |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 7537 | // Printf ONE line iff flag is set. |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 7538 | if (!FLAG_trace_gc && !FLAG_print_cumulative_gc_stat) return; |
| 7539 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 7540 | bool first_gc = (heap_->last_gc_end_timestamp_ == 0); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 7541 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 7542 | heap_->alive_after_last_gc_ = heap_->SizeOfObjects(); |
| 7543 | heap_->last_gc_end_timestamp_ = OS::TimeCurrentMillis(); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 7544 | |
yangguo@chromium.org | c03a192 | 2013-02-19 13:55:47 +0000 | [diff] [blame] | 7545 | double time = heap_->last_gc_end_timestamp_ - start_time_; |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 7546 | |
| 7547 | // Update cumulative GC statistics if required. |
| 7548 | if (FLAG_print_cumulative_gc_stat) { |
mstarzinger@chromium.org | 471f2f1 | 2012-08-10 14:46:33 +0000 | [diff] [blame] | 7549 | heap_->total_gc_time_ms_ += time; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 7550 | heap_->max_gc_pause_ = Max(heap_->max_gc_pause_, time); |
| 7551 | heap_->max_alive_after_gc_ = Max(heap_->max_alive_after_gc_, |
| 7552 | heap_->alive_after_last_gc_); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 7553 | if (!first_gc) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 7554 | heap_->min_in_mutator_ = Min(heap_->min_in_mutator_, |
yangguo@chromium.org | c03a192 | 2013-02-19 13:55:47 +0000 | [diff] [blame] | 7555 | spent_in_mutator_); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 7556 | } |
mstarzinger@chromium.org | 471f2f1 | 2012-08-10 14:46:33 +0000 | [diff] [blame] | 7557 | } else if (FLAG_trace_gc_verbose) { |
| 7558 | heap_->total_gc_time_ms_ += time; |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 7559 | } |
| 7560 | |
mstarzinger@chromium.org | 471f2f1 | 2012-08-10 14:46:33 +0000 | [diff] [blame] | 7561 | if (collector_ == SCAVENGER && FLAG_trace_gc_ignore_scavenger) return; |
| 7562 | |
mstarzinger@chromium.org | e3b8d0f | 2013-02-01 09:06:41 +0000 | [diff] [blame] | 7563 | heap_->AddMarkingTime(scopes_[Scope::MC_MARK]); |
| 7564 | |
| 7565 | if (FLAG_print_cumulative_gc_stat && !FLAG_trace_gc) return; |
rossberg@chromium.org | 657d53b | 2012-07-12 11:06:03 +0000 | [diff] [blame] | 7566 | PrintPID("%8.0f ms: ", heap_->isolate()->time_millis_since_init()); |
rossberg@chromium.org | 994edf6 | 2012-02-06 10:12:55 +0000 | [diff] [blame] | 7567 | |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 7568 | if (!FLAG_trace_gc_nvp) { |
| 7569 | int external_time = static_cast<int>(scopes_[Scope::EXTERNAL]); |
| 7570 | |
jkummerow@chromium.org | 1145ef8 | 2012-02-02 16:21:15 +0000 | [diff] [blame] | 7571 | double end_memory_size_mb = |
| 7572 | static_cast<double>(heap_->isolate()->memory_allocator()->Size()) / MB; |
| 7573 | |
| 7574 | PrintF("%s %.1f (%.1f) -> %.1f (%.1f) MB, ", |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 7575 | CollectorString(), |
jkummerow@chromium.org | 1145ef8 | 2012-02-02 16:21:15 +0000 | [diff] [blame] | 7576 | static_cast<double>(start_object_size_) / MB, |
| 7577 | static_cast<double>(start_memory_size_) / MB, |
| 7578 | SizeOfHeapObjects(), |
| 7579 | end_memory_size_mb); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 7580 | |
| 7581 | if (external_time > 0) PrintF("%d / ", external_time); |
yangguo@chromium.org | c03a192 | 2013-02-19 13:55:47 +0000 | [diff] [blame] | 7582 | PrintF("%.1f ms", time); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 7583 | if (steps_count_ > 0) { |
| 7584 | if (collector_ == SCAVENGER) { |
yangguo@chromium.org | c03a192 | 2013-02-19 13:55:47 +0000 | [diff] [blame] | 7585 | PrintF(" (+ %.1f ms in %d steps since last GC)", |
| 7586 | steps_took_since_last_gc_, |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 7587 | steps_count_since_last_gc_); |
| 7588 | } else { |
yangguo@chromium.org | c03a192 | 2013-02-19 13:55:47 +0000 | [diff] [blame] | 7589 | PrintF(" (+ %.1f ms in %d steps since start of marking, " |
| 7590 | "biggest step %.1f ms)", |
| 7591 | steps_took_, |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 7592 | steps_count_, |
| 7593 | longest_step_); |
| 7594 | } |
| 7595 | } |
rossberg@chromium.org | 994edf6 | 2012-02-06 10:12:55 +0000 | [diff] [blame] | 7596 | |
| 7597 | if (gc_reason_ != NULL) { |
| 7598 | PrintF(" [%s]", gc_reason_); |
| 7599 | } |
| 7600 | |
| 7601 | if (collector_reason_ != NULL) { |
| 7602 | PrintF(" [%s]", collector_reason_); |
| 7603 | } |
| 7604 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 7605 | PrintF(".\n"); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 7606 | } else { |
yangguo@chromium.org | c03a192 | 2013-02-19 13:55:47 +0000 | [diff] [blame] | 7607 | PrintF("pause=%.1f ", time); |
| 7608 | PrintF("mutator=%.1f ", spent_in_mutator_); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 7609 | PrintF("gc="); |
| 7610 | switch (collector_) { |
| 7611 | case SCAVENGER: |
| 7612 | PrintF("s"); |
| 7613 | break; |
| 7614 | case MARK_COMPACTOR: |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 7615 | PrintF("ms"); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 7616 | break; |
| 7617 | default: |
| 7618 | UNREACHABLE(); |
| 7619 | } |
| 7620 | PrintF(" "); |
| 7621 | |
yangguo@chromium.org | c03a192 | 2013-02-19 13:55:47 +0000 | [diff] [blame] | 7622 | PrintF("external=%.1f ", scopes_[Scope::EXTERNAL]); |
| 7623 | PrintF("mark=%.1f ", scopes_[Scope::MC_MARK]); |
| 7624 | PrintF("sweep=%.1f ", scopes_[Scope::MC_SWEEP]); |
| 7625 | PrintF("sweepns=%.1f ", scopes_[Scope::MC_SWEEP_NEWSPACE]); |
| 7626 | PrintF("evacuate=%.1f ", scopes_[Scope::MC_EVACUATE_PAGES]); |
| 7627 | PrintF("new_new=%.1f ", scopes_[Scope::MC_UPDATE_NEW_TO_NEW_POINTERS]); |
| 7628 | PrintF("root_new=%.1f ", scopes_[Scope::MC_UPDATE_ROOT_TO_NEW_POINTERS]); |
| 7629 | PrintF("old_new=%.1f ", scopes_[Scope::MC_UPDATE_OLD_TO_NEW_POINTERS]); |
| 7630 | PrintF("compaction_ptrs=%.1f ", |
| 7631 | scopes_[Scope::MC_UPDATE_POINTERS_TO_EVACUATED]); |
| 7632 | PrintF("intracompaction_ptrs=%.1f ", |
| 7633 | scopes_[Scope::MC_UPDATE_POINTERS_BETWEEN_EVACUATED]); |
| 7634 | PrintF("misc_compaction=%.1f ", scopes_[Scope::MC_UPDATE_MISC_POINTERS]); |
jkummerow@chromium.org | ba72ec8 | 2013-07-22 09:21:20 +0000 | [diff] [blame] | 7635 | PrintF("weakcollection_process=%.1f ", |
| 7636 | scopes_[Scope::MC_WEAKCOLLECTION_PROCESS]); |
| 7637 | PrintF("weakcollection_clear=%.1f ", |
| 7638 | scopes_[Scope::MC_WEAKCOLLECTION_CLEAR]); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 7639 | |
jkummerow@chromium.org | 1145ef8 | 2012-02-02 16:21:15 +0000 | [diff] [blame] | 7640 | PrintF("total_size_before=%" V8_PTR_PREFIX "d ", start_object_size_); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 7641 | PrintF("total_size_after=%" V8_PTR_PREFIX "d ", heap_->SizeOfObjects()); |
kmillikin@chromium.org | f05f291 | 2010-09-30 10:07:24 +0000 | [diff] [blame] | 7642 | PrintF("holes_size_before=%" V8_PTR_PREFIX "d ", |
| 7643 | in_free_list_or_wasted_before_gc_); |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 7644 | PrintF("holes_size_after=%" V8_PTR_PREFIX "d ", CountTotalHolesSize(heap_)); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 7645 | |
kmillikin@chromium.org | f05f291 | 2010-09-30 10:07:24 +0000 | [diff] [blame] | 7646 | PrintF("allocated=%" V8_PTR_PREFIX "d ", allocated_since_last_gc_); |
| 7647 | PrintF("promoted=%" V8_PTR_PREFIX "d ", promoted_objects_size_); |
rossberg@chromium.org | cddc71f | 2012-12-07 12:40:13 +0000 | [diff] [blame] | 7648 | PrintF("nodes_died_in_new=%d ", nodes_died_in_new_space_); |
| 7649 | PrintF("nodes_copied_in_new=%d ", nodes_copied_in_new_space_); |
| 7650 | PrintF("nodes_promoted=%d ", nodes_promoted_); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 7651 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 7652 | if (collector_ == SCAVENGER) { |
| 7653 | PrintF("stepscount=%d ", steps_count_since_last_gc_); |
yangguo@chromium.org | c03a192 | 2013-02-19 13:55:47 +0000 | [diff] [blame] | 7654 | PrintF("stepstook=%.1f ", steps_took_since_last_gc_); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 7655 | } else { |
| 7656 | PrintF("stepscount=%d ", steps_count_); |
yangguo@chromium.org | c03a192 | 2013-02-19 13:55:47 +0000 | [diff] [blame] | 7657 | PrintF("stepstook=%.1f ", steps_took_); |
| 7658 | PrintF("longeststep=%.1f ", longest_step_); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 7659 | } |
| 7660 | |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 7661 | PrintF("\n"); |
| 7662 | } |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 7663 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 7664 | heap_->PrintShortHeapStatistics(); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 7665 | } |
| 7666 | |
| 7667 | |
| 7668 | const char* GCTracer::CollectorString() { |
| 7669 | switch (collector_) { |
| 7670 | case SCAVENGER: |
| 7671 | return "Scavenge"; |
| 7672 | case MARK_COMPACTOR: |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 7673 | return "Mark-sweep"; |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 7674 | } |
| 7675 | return "Unknown GC"; |
| 7676 | } |
| 7677 | |
| 7678 | |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 7679 | int KeyedLookupCache::Hash(Map* map, Name* name) { |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 7680 | // Uses only lower 32 bits if pointers are larger. |
| 7681 | uintptr_t addr_hash = |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 7682 | static_cast<uint32_t>(reinterpret_cast<uintptr_t>(map)) >> kMapHashShift; |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 7683 | return static_cast<uint32_t>((addr_hash ^ name->Hash()) & kCapacityMask); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 7684 | } |
| 7685 | |
| 7686 | |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 7687 | int KeyedLookupCache::Lookup(Map* map, Name* name) { |
jkummerow@chromium.org | 05ed9dd | 2012-01-23 14:42:48 +0000 | [diff] [blame] | 7688 | int index = (Hash(map, name) & kHashMask); |
yangguo@chromium.org | 659ceec | 2012-01-26 07:37:54 +0000 | [diff] [blame] | 7689 | for (int i = 0; i < kEntriesPerBucket; i++) { |
| 7690 | Key& key = keys_[index + i]; |
| 7691 | if ((key.map == map) && key.name->Equals(name)) { |
| 7692 | return field_offsets_[index + i]; |
| 7693 | } |
jkummerow@chromium.org | 05ed9dd | 2012-01-23 14:42:48 +0000 | [diff] [blame] | 7694 | } |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 7695 | return kNotFound; |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 7696 | } |
| 7697 | |
| 7698 | |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 7699 | void KeyedLookupCache::Update(Map* map, Name* name, int field_offset) { |
| 7700 | if (!name->IsUniqueName()) { |
| 7701 | String* internalized_string; |
hpayer@chromium.org | c5d4971 | 2013-09-11 08:25:48 +0000 | [diff] [blame] | 7702 | if (!map->GetIsolate()->heap()->InternalizeStringIfExists( |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 7703 | String::cast(name), &internalized_string)) { |
| 7704 | return; |
yangguo@chromium.org | 659ceec | 2012-01-26 07:37:54 +0000 | [diff] [blame] | 7705 | } |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 7706 | name = internalized_string; |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 7707 | } |
mstarzinger@chromium.org | f705b50 | 2013-04-04 11:38:09 +0000 | [diff] [blame] | 7708 | // This cache is cleared only between mark compact passes, so we expect the |
| 7709 | // cache to only contain old space names. |
hpayer@chromium.org | c5d4971 | 2013-09-11 08:25:48 +0000 | [diff] [blame] | 7710 | ASSERT(!map->GetIsolate()->heap()->InNewSpace(name)); |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 7711 | |
| 7712 | int index = (Hash(map, name) & kHashMask); |
| 7713 | // After a GC there will be free slots, so we use them in order (this may |
| 7714 | // help to get the most frequently used one in position 0). |
| 7715 | for (int i = 0; i< kEntriesPerBucket; i++) { |
| 7716 | Key& key = keys_[index]; |
| 7717 | Object* free_entry_indicator = NULL; |
| 7718 | if (key.map == free_entry_indicator) { |
| 7719 | key.map = map; |
| 7720 | key.name = name; |
| 7721 | field_offsets_[index + i] = field_offset; |
| 7722 | return; |
| 7723 | } |
| 7724 | } |
| 7725 | // No free entry found in this bucket, so we move them all down one and |
| 7726 | // put the new entry at position zero. |
| 7727 | for (int i = kEntriesPerBucket - 1; i > 0; i--) { |
| 7728 | Key& key = keys_[index + i]; |
| 7729 | Key& key2 = keys_[index + i - 1]; |
| 7730 | key = key2; |
| 7731 | field_offsets_[index + i] = field_offsets_[index + i - 1]; |
| 7732 | } |
| 7733 | |
| 7734 | // Write the new first entry. |
| 7735 | Key& key = keys_[index]; |
| 7736 | key.map = map; |
| 7737 | key.name = name; |
| 7738 | field_offsets_[index] = field_offset; |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 7739 | } |
| 7740 | |
| 7741 | |
| 7742 | void KeyedLookupCache::Clear() { |
| 7743 | for (int index = 0; index < kLength; index++) keys_[index].map = NULL; |
| 7744 | } |
| 7745 | |
| 7746 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 7747 | void DescriptorLookupCache::Clear() { |
verwaest@chromium.org | 06ab2ec | 2012-10-09 17:00:13 +0000 | [diff] [blame] | 7748 | for (int index = 0; index < kLength; index++) keys_[index].source = NULL; |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 7749 | } |
| 7750 | |
| 7751 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 7752 | #ifdef DEBUG |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 7753 | void Heap::GarbageCollectionGreedyCheck() { |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 7754 | ASSERT(FLAG_gc_greedy); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 7755 | if (isolate_->bootstrapper()->IsActive()) return; |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 7756 | if (disallow_allocation_failure()) return; |
| 7757 | CollectGarbage(NEW_SPACE); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 7758 | } |
| 7759 | #endif |
| 7760 | |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 7761 | |
jkummerow@chromium.org | 3d00d0a | 2013-09-04 13:57:32 +0000 | [diff] [blame] | 7762 | TranscendentalCache::SubCache::SubCache(Isolate* isolate, Type t) |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 7763 | : type_(t), |
jkummerow@chromium.org | 3d00d0a | 2013-09-04 13:57:32 +0000 | [diff] [blame] | 7764 | isolate_(isolate) { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 7765 | uint32_t in0 = 0xffffffffu; // Bit-pattern for a NaN that isn't |
| 7766 | uint32_t in1 = 0xffffffffu; // generated by the FPU. |
| 7767 | for (int i = 0; i < kCacheSize; i++) { |
| 7768 | elements_[i].in[0] = in0; |
| 7769 | elements_[i].in[1] = in1; |
| 7770 | elements_[i].output = NULL; |
| 7771 | } |
| 7772 | } |
| 7773 | |
| 7774 | |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 7775 | void TranscendentalCache::Clear() { |
| 7776 | for (int i = 0; i < kNumberOfCaches; i++) { |
| 7777 | if (caches_[i] != NULL) { |
| 7778 | delete caches_[i]; |
| 7779 | caches_[i] = NULL; |
| 7780 | } |
| 7781 | } |
| 7782 | } |
| 7783 | |
| 7784 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 7785 | void ExternalStringTable::CleanUp() { |
| 7786 | int last = 0; |
| 7787 | for (int i = 0; i < new_space_strings_.length(); ++i) { |
danno@chromium.org | 72204d5 | 2012-10-31 10:02:10 +0000 | [diff] [blame] | 7788 | if (new_space_strings_[i] == heap_->the_hole_value()) { |
jkummerow@chromium.org | c3b3712 | 2011-11-07 10:14:12 +0000 | [diff] [blame] | 7789 | continue; |
| 7790 | } |
jkummerow@chromium.org | dc94e19 | 2013-08-30 11:35:42 +0000 | [diff] [blame] | 7791 | ASSERT(new_space_strings_[i]->IsExternalString()); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 7792 | if (heap_->InNewSpace(new_space_strings_[i])) { |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 7793 | new_space_strings_[last++] = new_space_strings_[i]; |
| 7794 | } else { |
| 7795 | old_space_strings_.Add(new_space_strings_[i]); |
| 7796 | } |
| 7797 | } |
| 7798 | new_space_strings_.Rewind(last); |
yangguo@chromium.org | 46a2a51 | 2013-01-18 16:29:40 +0000 | [diff] [blame] | 7799 | new_space_strings_.Trim(); |
| 7800 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 7801 | last = 0; |
| 7802 | for (int i = 0; i < old_space_strings_.length(); ++i) { |
danno@chromium.org | 72204d5 | 2012-10-31 10:02:10 +0000 | [diff] [blame] | 7803 | if (old_space_strings_[i] == heap_->the_hole_value()) { |
jkummerow@chromium.org | c3b3712 | 2011-11-07 10:14:12 +0000 | [diff] [blame] | 7804 | continue; |
| 7805 | } |
jkummerow@chromium.org | dc94e19 | 2013-08-30 11:35:42 +0000 | [diff] [blame] | 7806 | ASSERT(old_space_strings_[i]->IsExternalString()); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 7807 | ASSERT(!heap_->InNewSpace(old_space_strings_[i])); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 7808 | old_space_strings_[last++] = old_space_strings_[i]; |
| 7809 | } |
| 7810 | old_space_strings_.Rewind(last); |
yangguo@chromium.org | 46a2a51 | 2013-01-18 16:29:40 +0000 | [diff] [blame] | 7811 | old_space_strings_.Trim(); |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 7812 | #ifdef VERIFY_HEAP |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 7813 | if (FLAG_verify_heap) { |
| 7814 | Verify(); |
| 7815 | } |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 7816 | #endif |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 7817 | } |
| 7818 | |
| 7819 | |
| 7820 | void ExternalStringTable::TearDown() { |
| 7821 | new_space_strings_.Free(); |
| 7822 | old_space_strings_.Free(); |
| 7823 | } |
| 7824 | |
| 7825 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 7826 | void Heap::QueueMemoryChunkForFree(MemoryChunk* chunk) { |
| 7827 | chunk->set_next_chunk(chunks_queued_for_free_); |
| 7828 | chunks_queued_for_free_ = chunk; |
| 7829 | } |
| 7830 | |
| 7831 | |
| 7832 | void Heap::FreeQueuedChunks() { |
| 7833 | if (chunks_queued_for_free_ == NULL) return; |
| 7834 | MemoryChunk* next; |
| 7835 | MemoryChunk* chunk; |
| 7836 | for (chunk = chunks_queued_for_free_; chunk != NULL; chunk = next) { |
| 7837 | next = chunk->next_chunk(); |
| 7838 | chunk->SetFlag(MemoryChunk::ABOUT_TO_BE_FREED); |
| 7839 | |
| 7840 | if (chunk->owner()->identity() == LO_SPACE) { |
| 7841 | // StoreBuffer::Filter relies on MemoryChunk::FromAnyPointerAddress. |
| 7842 | // If FromAnyPointerAddress encounters a slot that belongs to a large |
| 7843 | // chunk queued for deletion it will fail to find the chunk because |
| 7844 | // it try to perform a search in the list of pages owned by of the large |
| 7845 | // object space and queued chunks were detached from that list. |
| 7846 | // To work around this we split large chunk into normal kPageSize aligned |
danno@chromium.org | 2c45679 | 2011-11-11 12:00:53 +0000 | [diff] [blame] | 7847 | // pieces and initialize size, owner and flags field of every piece. |
| 7848 | // If FromAnyPointerAddress encounters a slot that belongs to one of |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 7849 | // these smaller pieces it will treat it as a slot on a normal Page. |
ulan@chromium.org | 9a21ec4 | 2012-03-06 08:42:24 +0000 | [diff] [blame] | 7850 | Address chunk_end = chunk->address() + chunk->size(); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 7851 | MemoryChunk* inner = MemoryChunk::FromAddress( |
| 7852 | chunk->address() + Page::kPageSize); |
ulan@chromium.org | 9a21ec4 | 2012-03-06 08:42:24 +0000 | [diff] [blame] | 7853 | MemoryChunk* inner_last = MemoryChunk::FromAddress(chunk_end - 1); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 7854 | while (inner <= inner_last) { |
| 7855 | // Size of a large chunk is always a multiple of |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 7856 | // OS::AllocateAlignment() so there is always |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 7857 | // enough space for a fake MemoryChunk header. |
ulan@chromium.org | 9a21ec4 | 2012-03-06 08:42:24 +0000 | [diff] [blame] | 7858 | Address area_end = Min(inner->address() + Page::kPageSize, chunk_end); |
| 7859 | // Guard against overflow. |
| 7860 | if (area_end < inner->address()) area_end = chunk_end; |
| 7861 | inner->SetArea(inner->address(), area_end); |
danno@chromium.org | 2c45679 | 2011-11-11 12:00:53 +0000 | [diff] [blame] | 7862 | inner->set_size(Page::kPageSize); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 7863 | inner->set_owner(lo_space()); |
| 7864 | inner->SetFlag(MemoryChunk::ABOUT_TO_BE_FREED); |
| 7865 | inner = MemoryChunk::FromAddress( |
| 7866 | inner->address() + Page::kPageSize); |
| 7867 | } |
| 7868 | } |
| 7869 | } |
| 7870 | isolate_->heap()->store_buffer()->Compact(); |
| 7871 | isolate_->heap()->store_buffer()->Filter(MemoryChunk::ABOUT_TO_BE_FREED); |
| 7872 | for (chunk = chunks_queued_for_free_; chunk != NULL; chunk = next) { |
| 7873 | next = chunk->next_chunk(); |
| 7874 | isolate_->memory_allocator()->Free(chunk); |
| 7875 | } |
| 7876 | chunks_queued_for_free_ = NULL; |
| 7877 | } |
| 7878 | |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 7879 | |
| 7880 | void Heap::RememberUnmappedPage(Address page, bool compacted) { |
| 7881 | uintptr_t p = reinterpret_cast<uintptr_t>(page); |
| 7882 | // Tag the page pointer to make it findable in the dump file. |
| 7883 | if (compacted) { |
| 7884 | p ^= 0xc1ead & (Page::kPageSize - 1); // Cleared. |
| 7885 | } else { |
| 7886 | p ^= 0x1d1ed & (Page::kPageSize - 1); // I died. |
| 7887 | } |
| 7888 | remembered_unmapped_pages_[remembered_unmapped_pages_index_] = |
| 7889 | reinterpret_cast<Address>(p); |
| 7890 | remembered_unmapped_pages_index_++; |
| 7891 | remembered_unmapped_pages_index_ %= kRememberedUnmappedPages; |
| 7892 | } |
| 7893 | |
jkummerow@chromium.org | 28583c9 | 2012-07-16 11:31:55 +0000 | [diff] [blame] | 7894 | |
| 7895 | void Heap::ClearObjectStats(bool clear_last_time_stats) { |
| 7896 | memset(object_counts_, 0, sizeof(object_counts_)); |
| 7897 | memset(object_sizes_, 0, sizeof(object_sizes_)); |
| 7898 | if (clear_last_time_stats) { |
| 7899 | memset(object_counts_last_time_, 0, sizeof(object_counts_last_time_)); |
| 7900 | memset(object_sizes_last_time_, 0, sizeof(object_sizes_last_time_)); |
| 7901 | } |
| 7902 | } |
| 7903 | |
| 7904 | |
| 7905 | static LazyMutex checkpoint_object_stats_mutex = LAZY_MUTEX_INITIALIZER; |
| 7906 | |
| 7907 | |
| 7908 | void Heap::CheckpointObjectStats() { |
jkummerow@chromium.org | dc94e19 | 2013-08-30 11:35:42 +0000 | [diff] [blame] | 7909 | LockGuard<Mutex> lock_guard(checkpoint_object_stats_mutex.Pointer()); |
jkummerow@chromium.org | 28583c9 | 2012-07-16 11:31:55 +0000 | [diff] [blame] | 7910 | Counters* counters = isolate()->counters(); |
| 7911 | #define ADJUST_LAST_TIME_OBJECT_COUNT(name) \ |
| 7912 | counters->count_of_##name()->Increment( \ |
| 7913 | static_cast<int>(object_counts_[name])); \ |
| 7914 | counters->count_of_##name()->Decrement( \ |
| 7915 | static_cast<int>(object_counts_last_time_[name])); \ |
| 7916 | counters->size_of_##name()->Increment( \ |
| 7917 | static_cast<int>(object_sizes_[name])); \ |
| 7918 | counters->size_of_##name()->Decrement( \ |
| 7919 | static_cast<int>(object_sizes_last_time_[name])); |
| 7920 | INSTANCE_TYPE_LIST(ADJUST_LAST_TIME_OBJECT_COUNT) |
| 7921 | #undef ADJUST_LAST_TIME_OBJECT_COUNT |
verwaest@chromium.org | 753aee4 | 2012-07-17 16:15:42 +0000 | [diff] [blame] | 7922 | int index; |
| 7923 | #define ADJUST_LAST_TIME_OBJECT_COUNT(name) \ |
| 7924 | index = FIRST_CODE_KIND_SUB_TYPE + Code::name; \ |
| 7925 | counters->count_of_CODE_TYPE_##name()->Increment( \ |
| 7926 | static_cast<int>(object_counts_[index])); \ |
| 7927 | counters->count_of_CODE_TYPE_##name()->Decrement( \ |
| 7928 | static_cast<int>(object_counts_last_time_[index])); \ |
| 7929 | counters->size_of_CODE_TYPE_##name()->Increment( \ |
| 7930 | static_cast<int>(object_sizes_[index])); \ |
| 7931 | counters->size_of_CODE_TYPE_##name()->Decrement( \ |
| 7932 | static_cast<int>(object_sizes_last_time_[index])); |
| 7933 | CODE_KIND_LIST(ADJUST_LAST_TIME_OBJECT_COUNT) |
| 7934 | #undef ADJUST_LAST_TIME_OBJECT_COUNT |
yangguo@chromium.org | 304cc33 | 2012-07-24 07:59:48 +0000 | [diff] [blame] | 7935 | #define ADJUST_LAST_TIME_OBJECT_COUNT(name) \ |
| 7936 | index = FIRST_FIXED_ARRAY_SUB_TYPE + name; \ |
| 7937 | counters->count_of_FIXED_ARRAY_##name()->Increment( \ |
| 7938 | static_cast<int>(object_counts_[index])); \ |
| 7939 | counters->count_of_FIXED_ARRAY_##name()->Decrement( \ |
| 7940 | static_cast<int>(object_counts_last_time_[index])); \ |
| 7941 | counters->size_of_FIXED_ARRAY_##name()->Increment( \ |
| 7942 | static_cast<int>(object_sizes_[index])); \ |
| 7943 | counters->size_of_FIXED_ARRAY_##name()->Decrement( \ |
| 7944 | static_cast<int>(object_sizes_last_time_[index])); |
| 7945 | FIXED_ARRAY_SUB_INSTANCE_TYPE_LIST(ADJUST_LAST_TIME_OBJECT_COUNT) |
| 7946 | #undef ADJUST_LAST_TIME_OBJECT_COUNT |
bmeurer@chromium.org | e94b5ff | 2013-10-25 09:22:31 +0000 | [diff] [blame^] | 7947 | #define ADJUST_LAST_TIME_OBJECT_COUNT(name) \ |
| 7948 | index = FIRST_CODE_AGE_SUB_TYPE + Code::k##name##CodeAge; \ |
| 7949 | counters->count_of_CODE_AGE_##name()->Increment( \ |
| 7950 | static_cast<int>(object_counts_[index])); \ |
| 7951 | counters->count_of_CODE_AGE_##name()->Decrement( \ |
| 7952 | static_cast<int>(object_counts_last_time_[index])); \ |
| 7953 | counters->size_of_CODE_AGE_##name()->Increment( \ |
| 7954 | static_cast<int>(object_sizes_[index])); \ |
| 7955 | counters->size_of_CODE_AGE_##name()->Decrement( \ |
| 7956 | static_cast<int>(object_sizes_last_time_[index])); |
| 7957 | CODE_AGE_LIST_WITH_NO_AGE(ADJUST_LAST_TIME_OBJECT_COUNT) |
| 7958 | #undef ADJUST_LAST_TIME_OBJECT_COUNT |
verwaest@chromium.org | 753aee4 | 2012-07-17 16:15:42 +0000 | [diff] [blame] | 7959 | |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 7960 | OS::MemCopy(object_counts_last_time_, object_counts_, sizeof(object_counts_)); |
| 7961 | OS::MemCopy(object_sizes_last_time_, object_sizes_, sizeof(object_sizes_)); |
jkummerow@chromium.org | 28583c9 | 2012-07-16 11:31:55 +0000 | [diff] [blame] | 7962 | ClearObjectStats(); |
| 7963 | } |
| 7964 | |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 7965 | |
| 7966 | Heap::RelocationLock::RelocationLock(Heap* heap) : heap_(heap) { |
rossberg@chromium.org | 9259716 | 2013-08-23 13:28:00 +0000 | [diff] [blame] | 7967 | if (FLAG_concurrent_recompilation) { |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 7968 | heap_->relocation_mutex_->Lock(); |
| 7969 | #ifdef DEBUG |
| 7970 | heap_->relocation_mutex_locked_by_optimizer_thread_ = |
| 7971 | heap_->isolate()->optimizing_compiler_thread()->IsOptimizerThread(); |
| 7972 | #endif // DEBUG |
| 7973 | } |
| 7974 | } |
| 7975 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7976 | } } // namespace v8::internal |