sticky_mark_sweep.cc revision 02e25119b15a6f619f17db99f5d05124a5807ff3
1/* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#include "gc/heap.h" 18#include "gc/space/large_object_space.h" 19#include "gc/space/space.h" 20#include "sticky_mark_sweep.h" 21#include "thread.h" 22 23namespace art { 24namespace gc { 25namespace collector { 26 27StickyMarkSweep::StickyMarkSweep(Heap* heap, bool is_concurrent, const std::string& name_prefix) 28 : PartialMarkSweep(heap, is_concurrent, 29 name_prefix + (name_prefix.empty() ? "" : " ") + "sticky") { 30 cumulative_timings_.SetName(GetName()); 31} 32 33void StickyMarkSweep::BindBitmaps() { 34 PartialMarkSweep::BindBitmaps(); 35 36 WriterMutexLock mu(Thread::Current(), *Locks::heap_bitmap_lock_); 37 // For sticky GC, we want to bind the bitmaps of all spaces as the allocation stack lets us 38 // know what was allocated since the last GC. A side-effect of binding the allocation space mark 39 // and live bitmap is that marking the objects will place them in the live bitmap. 40 for (const auto& space : GetHeap()->GetContinuousSpaces()) { 41 if (space->GetGcRetentionPolicy() == space::kGcRetentionPolicyAlwaysCollect) { 42 BindLiveToMarkBitmap(space); 43 } 44 } 45 46 GetHeap()->GetLargeObjectsSpace()->CopyLiveToMarked(); 47} 48 49void StickyMarkSweep::MarkReachableObjects() { 50 RecursiveMarkDirtyObjects(accounting::CardTable::kCardDirty - 1); 51} 52 53void StickyMarkSweep::Sweep(bool swap_bitmaps) { 54 accounting::ObjectStack* live_stack = GetHeap()->GetLiveStack(); 55 SweepArray(live_stack, false); 56} 57 58} // namespace collector 59} // namespace gc 60} // namespace art 61