47e86b889e
R=svenpanne@chromium.org BUG= Review URL: https://codereview.chromium.org/23708030 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16622 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
101 lines
3.7 KiB
C++
101 lines
3.7 KiB
C++
// Copyright 2012 the V8 project authors. All rights reserved.
|
|
// Redistribution and use in source and binary forms, with or without
|
|
// modification, are permitted provided that the following conditions are
|
|
// met:
|
|
//
|
|
// * Redistributions of source code must retain the above copyright
|
|
// notice, this list of conditions and the following disclaimer.
|
|
// * Redistributions in binary form must reproduce the above
|
|
// copyright notice, this list of conditions and the following
|
|
// disclaimer in the documentation and/or other materials provided
|
|
// with the distribution.
|
|
// * Neither the name of Google Inc. nor the names of its
|
|
// contributors may be used to endorse or promote products derived
|
|
// from this software without specific prior written permission.
|
|
//
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
#ifndef V8_MARK_COMPACT_INL_H_
|
|
#define V8_MARK_COMPACT_INL_H_
|
|
|
|
#include "isolate.h"
|
|
#include "memory.h"
|
|
#include "mark-compact.h"
|
|
|
|
|
|
namespace v8 {
|
|
namespace internal {
|
|
|
|
|
|
MarkBit Marking::MarkBitFrom(Address addr) {
|
|
MemoryChunk* p = MemoryChunk::FromAddress(addr);
|
|
return p->markbits()->MarkBitFromIndex(p->AddressToMarkbitIndex(addr),
|
|
p->ContainsOnlyData());
|
|
}
|
|
|
|
|
|
void MarkCompactCollector::SetFlags(int flags) {
|
|
sweep_precisely_ = ((flags & Heap::kSweepPreciselyMask) != 0);
|
|
reduce_memory_footprint_ = ((flags & Heap::kReduceMemoryFootprintMask) != 0);
|
|
abort_incremental_marking_ =
|
|
((flags & Heap::kAbortIncrementalMarkingMask) != 0);
|
|
}
|
|
|
|
|
|
void MarkCompactCollector::MarkObject(HeapObject* obj, MarkBit mark_bit) {
|
|
ASSERT(Marking::MarkBitFrom(obj) == mark_bit);
|
|
if (!mark_bit.Get()) {
|
|
mark_bit.Set();
|
|
MemoryChunk::IncrementLiveBytesFromGC(obj->address(), obj->Size());
|
|
ASSERT(IsMarked(obj));
|
|
ASSERT(obj->GetIsolate()->heap()->Contains(obj));
|
|
marking_deque_.PushBlack(obj);
|
|
}
|
|
}
|
|
|
|
|
|
void MarkCompactCollector::SetMark(HeapObject* obj, MarkBit mark_bit) {
|
|
ASSERT(!mark_bit.Get());
|
|
ASSERT(Marking::MarkBitFrom(obj) == mark_bit);
|
|
mark_bit.Set();
|
|
MemoryChunk::IncrementLiveBytesFromGC(obj->address(), obj->Size());
|
|
}
|
|
|
|
|
|
bool MarkCompactCollector::IsMarked(Object* obj) {
|
|
ASSERT(obj->IsHeapObject());
|
|
HeapObject* heap_object = HeapObject::cast(obj);
|
|
return Marking::MarkBitFrom(heap_object).Get();
|
|
}
|
|
|
|
|
|
void MarkCompactCollector::RecordSlot(Object** anchor_slot,
|
|
Object** slot,
|
|
Object* object) {
|
|
Page* object_page = Page::FromAddress(reinterpret_cast<Address>(object));
|
|
if (object_page->IsEvacuationCandidate() &&
|
|
!ShouldSkipEvacuationSlotRecording(anchor_slot)) {
|
|
if (!SlotsBuffer::AddTo(&slots_buffer_allocator_,
|
|
object_page->slots_buffer_address(),
|
|
slot,
|
|
SlotsBuffer::FAIL_ON_OVERFLOW)) {
|
|
EvictEvacuationCandidate(object_page);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
} } // namespace v8::internal
|
|
|
|
#endif // V8_MARK_COMPACT_INL_H_
|