danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +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 | #ifndef V8_ZONE_INL_H_ |
| 29 | #define V8_ZONE_INL_H_ |
| 30 | |
| 31 | #include "zone.h" |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 32 | |
| 33 | #include "counters.h" |
| 34 | #include "isolate.h" |
| 35 | #include "utils.h" |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 36 | #include "v8-counters.h" |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 37 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 38 | namespace v8 { |
| 39 | namespace internal { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 40 | |
| 41 | |
| 42 | inline void* Zone::New(int size) { |
yangguo@chromium.org | 5a11aaf | 2012-06-20 11:29:00 +0000 | [diff] [blame] | 43 | ASSERT(scope_nesting_ > 0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 44 | // Round up the requested size to fit the alignment. |
| 45 | size = RoundUp(size, kAlignment); |
| 46 | |
danno@chromium.org | 50d79f3 | 2011-11-11 12:01:18 +0000 | [diff] [blame] | 47 | // If the allocation size is divisible by 8 then we return an 8-byte aligned |
| 48 | // address. |
| 49 | if (kPointerSize == 4 && kAlignment == 4) { |
| 50 | position_ += ((~size) & 4) & (reinterpret_cast<intptr_t>(position_) & 4); |
| 51 | } else { |
| 52 | ASSERT(kAlignment >= kPointerSize); |
| 53 | } |
| 54 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 55 | // Check if the requested size is available without expanding. |
| 56 | Address result = position_; |
kmillikin@chromium.org | 83e1682 | 2011-09-13 08:21:47 +0000 | [diff] [blame] | 57 | |
| 58 | if (size > limit_ - position_) { |
| 59 | result = NewExpand(size); |
| 60 | } else { |
| 61 | position_ += size; |
| 62 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 63 | |
| 64 | // Check that the result has the proper alignment and return it. |
| 65 | ASSERT(IsAddressAligned(result, kAlignment, 0)); |
sgjesse@chromium.org | c6c5718 | 2011-01-17 12:24:25 +0000 | [diff] [blame] | 66 | allocation_size_ += size; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 67 | return reinterpret_cast<void*>(result); |
| 68 | } |
| 69 | |
| 70 | |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 71 | template <typename T> |
| 72 | T* Zone::NewArray(int length) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 73 | return static_cast<T*>(New(length * sizeof(T))); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 74 | } |
| 75 | |
| 76 | |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 77 | bool Zone::excess_allocation() { |
| 78 | return segment_bytes_allocated_ > zone_excess_limit_; |
| 79 | } |
| 80 | |
| 81 | |
| 82 | void Zone::adjust_segment_bytes_allocated(int delta) { |
| 83 | segment_bytes_allocated_ += delta; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 84 | isolate_->counters()->zone_segment_bytes()->Set(segment_bytes_allocated_); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 85 | } |
| 86 | |
| 87 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 88 | template <typename Config> |
| 89 | ZoneSplayTree<Config>::~ZoneSplayTree() { |
| 90 | // Reset the root to avoid unneeded iteration over all tree nodes |
| 91 | // in the destructor. For a zone-allocated tree, nodes will be |
| 92 | // freed by the Zone. |
rossberg@chromium.org | 400388e | 2012-06-06 09:29:22 +0000 | [diff] [blame] | 93 | SplayTree<Config, ZoneAllocationPolicy>::ResetRoot(); |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 94 | } |
| 95 | |
| 96 | |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 97 | void* ZoneObject::operator new(size_t size, Zone* zone) { |
| 98 | return zone->New(static_cast<int>(size)); |
| 99 | } |
| 100 | |
rossberg@chromium.org | 400388e | 2012-06-06 09:29:22 +0000 | [diff] [blame] | 101 | inline void* ZoneAllocationPolicy::New(size_t size) { |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 102 | ASSERT(zone_); |
yangguo@chromium.org | 5a11aaf | 2012-06-20 11:29:00 +0000 | [diff] [blame] | 103 | return zone_->New(static_cast<int>(size)); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 104 | } |
| 105 | |
| 106 | |
| 107 | template <typename T> |
| 108 | void* ZoneList<T>::operator new(size_t size, Zone* zone) { |
| 109 | return zone->New(static_cast<int>(size)); |
| 110 | } |
| 111 | |
| 112 | |
yangguo@chromium.org | 5a11aaf | 2012-06-20 11:29:00 +0000 | [diff] [blame] | 113 | ZoneScope::ZoneScope(Zone* zone, ZoneScopeMode mode) |
| 114 | : zone_(zone), mode_(mode) { |
| 115 | zone_->scope_nesting_++; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 116 | } |
| 117 | |
| 118 | |
| 119 | bool ZoneScope::ShouldDeleteOnExit() { |
yangguo@chromium.org | 5a11aaf | 2012-06-20 11:29:00 +0000 | [diff] [blame] | 120 | return zone_->scope_nesting_ == 1 && mode_ == DELETE_ON_EXIT; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 121 | } |
| 122 | |
| 123 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 124 | } } // namespace v8::internal |
| 125 | |
| 126 | #endif // V8_ZONE_INL_H_ |