yangguo@chromium.org | 5f0b8ea | 2012-05-16 12:37:04 +0000 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +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_INCREMENTAL_MARKING_INL_H_ |
| 29 | #define V8_INCREMENTAL_MARKING_INL_H_ |
| 30 | |
| 31 | #include "incremental-marking.h" |
| 32 | |
| 33 | namespace v8 { |
| 34 | namespace internal { |
| 35 | |
| 36 | |
| 37 | bool IncrementalMarking::BaseRecordWrite(HeapObject* obj, |
| 38 | Object** slot, |
| 39 | Object* value) { |
jkummerow@chromium.org | c3b3712 | 2011-11-07 10:14:12 +0000 | [diff] [blame] | 40 | MarkBit value_bit = Marking::MarkBitFrom(HeapObject::cast(value)); |
| 41 | if (Marking::IsWhite(value_bit)) { |
| 42 | MarkBit obj_bit = Marking::MarkBitFrom(obj); |
| 43 | if (Marking::IsBlack(obj_bit)) { |
| 44 | BlackToGreyAndUnshift(obj, obj_bit); |
| 45 | RestartIfNotMarking(); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 46 | } |
jkummerow@chromium.org | c3b3712 | 2011-11-07 10:14:12 +0000 | [diff] [blame] | 47 | |
| 48 | // Object is either grey or white. It will be scanned if survives. |
| 49 | return false; |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 50 | } |
jkummerow@chromium.org | c3b3712 | 2011-11-07 10:14:12 +0000 | [diff] [blame] | 51 | return true; |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 52 | } |
| 53 | |
| 54 | |
| 55 | void IncrementalMarking::RecordWrite(HeapObject* obj, |
| 56 | Object** slot, |
| 57 | Object* value) { |
jkummerow@chromium.org | c3b3712 | 2011-11-07 10:14:12 +0000 | [diff] [blame] | 58 | if (IsMarking() && value->NonFailureIsHeapObject()) { |
| 59 | RecordWriteSlow(obj, slot, value); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 60 | } |
| 61 | } |
| 62 | |
| 63 | |
jkummerow@chromium.org | c3b3712 | 2011-11-07 10:14:12 +0000 | [diff] [blame] | 64 | void IncrementalMarking::RecordWriteOfCodeEntry(JSFunction* host, |
| 65 | Object** slot, |
| 66 | Code* value) { |
| 67 | if (IsMarking()) RecordWriteOfCodeEntrySlow(host, slot, value); |
| 68 | } |
| 69 | |
| 70 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 71 | void IncrementalMarking::RecordWriteIntoCode(HeapObject* obj, |
| 72 | RelocInfo* rinfo, |
| 73 | Object* value) { |
jkummerow@chromium.org | c3b3712 | 2011-11-07 10:14:12 +0000 | [diff] [blame] | 74 | if (IsMarking() && value->NonFailureIsHeapObject()) { |
| 75 | RecordWriteIntoCodeSlow(obj, rinfo, value); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 76 | } |
| 77 | } |
| 78 | |
| 79 | |
| 80 | void IncrementalMarking::RecordWrites(HeapObject* obj) { |
| 81 | if (IsMarking()) { |
| 82 | MarkBit obj_bit = Marking::MarkBitFrom(obj); |
| 83 | if (Marking::IsBlack(obj_bit)) { |
| 84 | BlackToGreyAndUnshift(obj, obj_bit); |
| 85 | RestartIfNotMarking(); |
| 86 | } |
| 87 | } |
| 88 | } |
| 89 | |
| 90 | |
| 91 | void IncrementalMarking::BlackToGreyAndUnshift(HeapObject* obj, |
| 92 | MarkBit mark_bit) { |
| 93 | ASSERT(Marking::MarkBitFrom(obj) == mark_bit); |
| 94 | ASSERT(obj->Size() >= 2*kPointerSize); |
| 95 | ASSERT(IsMarking()); |
| 96 | Marking::BlackToGrey(mark_bit); |
| 97 | int obj_size = obj->Size(); |
ulan@chromium.org | 2efb900 | 2012-01-19 15:36:35 +0000 | [diff] [blame] | 98 | MemoryChunk::IncrementLiveBytesFromGC(obj->address(), -obj_size); |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 99 | bytes_scanned_ -= obj_size; |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 100 | int64_t old_bytes_rescanned = bytes_rescanned_; |
| 101 | bytes_rescanned_ = old_bytes_rescanned + obj_size; |
| 102 | if ((bytes_rescanned_ >> 20) != (old_bytes_rescanned >> 20)) { |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 103 | if (bytes_rescanned_ > 2 * heap_->PromotedSpaceSizeOfObjects()) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 104 | // If we have queued twice the heap size for rescanning then we are |
| 105 | // going around in circles, scanning the same objects again and again |
| 106 | // as the program mutates the heap faster than we can incrementally |
| 107 | // trace it. In this case we switch to non-incremental marking in |
| 108 | // order to finish off this marking phase. |
| 109 | if (FLAG_trace_gc) { |
rossberg@chromium.org | 657d53b | 2012-07-12 11:06:03 +0000 | [diff] [blame] | 110 | PrintPID("Hurrying incremental marking because of lack of progress\n"); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 111 | } |
| 112 | allocation_marking_factor_ = kMaxAllocationMarkingFactor; |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | marking_deque_.UnshiftGrey(obj); |
| 117 | } |
| 118 | |
| 119 | |
| 120 | void IncrementalMarking::WhiteToGreyAndPush(HeapObject* obj, MarkBit mark_bit) { |
yangguo@chromium.org | 5f0b8ea | 2012-05-16 12:37:04 +0000 | [diff] [blame] | 121 | Marking::WhiteToGrey(mark_bit); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 122 | marking_deque_.PushGrey(obj); |
| 123 | } |
| 124 | |
| 125 | |
yangguo@chromium.org | 5f0b8ea | 2012-05-16 12:37:04 +0000 | [diff] [blame] | 126 | bool IncrementalMarking::MarkObjectAndPush(HeapObject* obj) { |
| 127 | MarkBit mark_bit = Marking::MarkBitFrom(obj); |
| 128 | if (!mark_bit.Get()) { |
| 129 | WhiteToGreyAndPush(obj, mark_bit); |
| 130 | return true; |
| 131 | } |
| 132 | return false; |
| 133 | } |
| 134 | |
| 135 | |
| 136 | bool IncrementalMarking::MarkObjectWithoutPush(HeapObject* obj) { |
| 137 | MarkBit mark_bit = Marking::MarkBitFrom(obj); |
| 138 | if (!mark_bit.Get()) { |
| 139 | mark_bit.Set(); |
| 140 | MemoryChunk::IncrementLiveBytesFromGC(obj->address(), obj->Size()); |
| 141 | return true; |
| 142 | } |
| 143 | return false; |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 144 | } |
| 145 | |
| 146 | |
| 147 | } } // namespace v8::internal |
| 148 | |
| 149 | #endif // V8_INCREMENTAL_MARKING_INL_H_ |