mark_sweep.cc revision 2cebb24bfc3247d3e9be138a3350106737455918
12faa5f1271587cda765f26bcf2951065300a01ffElliott Hughes/* 22faa5f1271587cda765f26bcf2951065300a01ffElliott Hughes * Copyright (C) 2011 The Android Open Source Project 32faa5f1271587cda765f26bcf2951065300a01ffElliott Hughes * 42faa5f1271587cda765f26bcf2951065300a01ffElliott Hughes * Licensed under the Apache License, Version 2.0 (the "License"); 52faa5f1271587cda765f26bcf2951065300a01ffElliott Hughes * you may not use this file except in compliance with the License. 62faa5f1271587cda765f26bcf2951065300a01ffElliott Hughes * You may obtain a copy of the License at 72faa5f1271587cda765f26bcf2951065300a01ffElliott Hughes * 82faa5f1271587cda765f26bcf2951065300a01ffElliott Hughes * http://www.apache.org/licenses/LICENSE-2.0 92faa5f1271587cda765f26bcf2951065300a01ffElliott Hughes * 102faa5f1271587cda765f26bcf2951065300a01ffElliott Hughes * Unless required by applicable law or agreed to in writing, software 112faa5f1271587cda765f26bcf2951065300a01ffElliott Hughes * distributed under the License is distributed on an "AS IS" BASIS, 122faa5f1271587cda765f26bcf2951065300a01ffElliott Hughes * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 132faa5f1271587cda765f26bcf2951065300a01ffElliott Hughes * See the License for the specific language governing permissions and 142faa5f1271587cda765f26bcf2951065300a01ffElliott Hughes * limitations under the License. 152faa5f1271587cda765f26bcf2951065300a01ffElliott Hughes */ 1669759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro 17578bbdc684db8ed68e9fedbc678669d27fa68b6eBrian Carlstrom#include "mark_sweep.h" 1869759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro 19c7df66e2cb124d261cf3b0691a09a3b6e357b6f1Yabin Cui#include <atomic> 202b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier#include <functional> 212b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier#include <numeric> 2258551df3c2646ed507feec9e9eb3768085a76059Carl Shapiro#include <climits> 2358551df3c2646ed507feec9e9eb3768085a76059Carl Shapiro#include <vector> 2458551df3c2646ed507feec9e9eb3768085a76059Carl Shapiro 25cf7f19135f0e273f7b0136315633c2abfc715343Ian Rogers#define ATRACE_TAG ATRACE_TAG_DALVIK 26cf7f19135f0e273f7b0136315633c2abfc715343Ian Rogers#include "cutils/trace.h" 27cf7f19135f0e273f7b0136315633c2abfc715343Ian Rogers 2894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier#include "base/bounded_fifo.h" 2907ed66b5ae659c452cbe1ab20c3dbf1d6f546461Elliott Hughes#include "base/logging.h" 30761600567d73b23324ae0251e871c15d6849ffd8Elliott Hughes#include "base/macros.h" 31693ff61274cd2c9b8eb7e68c370f84a911b8ca52Ian Rogers#include "base/mutex-inl.h" 32a84395489098e4531619b1cffd1afc282b14510eSameer Abu Asal#include "base/timing_logger.h" 331d54e73444e017d3a65234e0f193846f3e27472bIan Rogers#include "gc/accounting/card_table-inl.h" 344aeec176eaf11fe03f342aadcbb79142230270edMathieu Chartier#include "gc/accounting/heap_bitmap-inl.h" 3511409ae81a3eaf84d7fd2b3c85b8b06d2bae27f0Mathieu Chartier#include "gc/accounting/mod_union_table.h" 361d54e73444e017d3a65234e0f193846f3e27472bIan Rogers#include "gc/accounting/space_bitmap-inl.h" 371d54e73444e017d3a65234e0f193846f3e27472bIan Rogers#include "gc/heap.h" 3878f7b4c04ab6e8b5581921bc95b67a9beee1c246Mathieu Chartier#include "gc/reference_processor.h" 391d54e73444e017d3a65234e0f193846f3e27472bIan Rogers#include "gc/space/image_space.h" 401d54e73444e017d3a65234e0f193846f3e27472bIan Rogers#include "gc/space/large_object_space.h" 411d54e73444e017d3a65234e0f193846f3e27472bIan Rogers#include "gc/space/space-inl.h" 422dd0e2cea360bc9206eb88ecc40d259e796c239dIan Rogers#include "mark_sweep-inl.h" 432dd0e2cea360bc9206eb88ecc40d259e796c239dIan Rogers#include "mirror/object-inl.h" 441f87008b165d26541d832ff805250afdc89c253dBrian Carlstrom#include "runtime.h" 454aeec176eaf11fe03f342aadcbb79142230270edMathieu Chartier#include "scoped_thread_state_change.h" 461d54e73444e017d3a65234e0f193846f3e27472bIan Rogers#include "thread-inl.h" 476f1c94968ada57da433debf8e2d1b38a80ceb510Mathieu Chartier#include "thread_list.h" 4869759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro 493e3d591f781b771de89f3b989830da2b6ac6fac8Brian Carlstromusing ::art::mirror::Object; 502dd0e2cea360bc9206eb88ecc40d259e796c239dIan Rogers 5169759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapironamespace art { 521d54e73444e017d3a65234e0f193846f3e27472bIan Rogersnamespace gc { 531d54e73444e017d3a65234e0f193846f3e27472bIan Rogersnamespace collector { 5469759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro 5502b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier// Performance options. 56eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartierstatic constexpr bool kUseRecursiveMark = false; 57eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartierstatic constexpr bool kUseMarkStackPrefetch = true; 58eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartierstatic constexpr size_t kSweepArrayChunkFreeSize = 1024; 59eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartierstatic constexpr bool kPreCleanCards = true; 6094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 6194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier// Parallelism options. 62eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartierstatic constexpr bool kParallelCardScan = true; 63eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartierstatic constexpr bool kParallelRecursiveMark = true; 6494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier// Don't attempt to parallelize mark stack processing unless the mark stack is at least n 6594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier// elements. This is temporary until we reduce the overhead caused by allocating tasks, etc.. Not 6694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier// having this can add overhead in ProcessReferences since we may end up doing many calls of 6794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier// ProcessMarkStack with very small mark stacks. 68eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartierstatic constexpr size_t kMinimumParallelMarkStackSize = 128; 69eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartierstatic constexpr bool kParallelProcessMarkStack = true; 70858f1c5fd5e528d0b16040ced74d4636046a42d8Mathieu Chartier 7102b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier// Profiling and information flags. 72eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartierstatic constexpr bool kProfileLargeObjects = false; 73eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartierstatic constexpr bool kMeasureOverhead = false; 74eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartierstatic constexpr bool kCountTasks = false; 75eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartierstatic constexpr bool kCountJavaLangRefs = false; 760e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartierstatic constexpr bool kCountMarkedObjects = false; 7794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 7894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier// Turn off kCheckLocks when profiling the GC since it slows the GC down by up to 40%. 79eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartierstatic constexpr bool kCheckLocks = kDebugLocking; 807bf9f190cd33a7e2f8584299eb889e9df66e0323Mathieu Chartierstatic constexpr bool kVerifyRootsMarked = kIsDebugBuild; 8102b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier 82c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchi// If true, revoke the rosalloc thread-local buffers at the 83c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchi// checkpoint, as opposed to during the pause. 84c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchistatic constexpr bool kRevokeRosAllocThreadLocalBuffersAtCheckpoint = true; 85c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchi 862b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartiervoid MarkSweep::BindBitmaps() { 87f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 882b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier WriterMutexLock mu(Thread::Current(), *Locks::heap_bitmap_lock_); 892b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier // Mark all of the spaces we never collect as immune. 9094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier for (const auto& space : GetHeap()->GetContinuousSpaces()) { 911d54e73444e017d3a65234e0f193846f3e27472bIan Rogers if (space->GetGcRetentionPolicy() == space::kGcRetentionPolicyNeverCollect) { 928d562103c3a3452fb15ef4b1c64df767b70507a4Mathieu Chartier CHECK(immune_region_.AddContinuousSpace(space)) << "Failed to add space " << *space; 932b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier } 942b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier } 952b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier} 962b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier 971d54e73444e017d3a65234e0f193846f3e27472bIan RogersMarkSweep::MarkSweep(Heap* heap, bool is_concurrent, const std::string& name_prefix) 981d54e73444e017d3a65234e0f193846f3e27472bIan Rogers : GarbageCollector(heap, 99590fee9e8972f872301c2d16a575d579ee564beeMathieu Chartier name_prefix + 1001d54e73444e017d3a65234e0f193846f3e27472bIan Rogers (is_concurrent ? "concurrent mark sweep": "mark sweep")), 1013e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers current_space_bitmap_(nullptr), mark_bitmap_(nullptr), mark_stack_(nullptr), 10235883cc623fdf475a4ead1dafcba9e9becc1ed11Mathieu Chartier gc_barrier_(new Barrier(0)), 103958291c7afe723d846a39539fd00410c102485f3Mathieu Chartier mark_stack_lock_("mark sweep mark stack lock", kMarkSweepMarkStackLock), 1043e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers is_concurrent_(is_concurrent), live_stack_freeze_size_(0) { 105bbdc5bc5fd5141711879a6c85d80ac45b7aad5d0Hiroshi Yamauchi std::string error_msg; 106bbdc5bc5fd5141711879a6c85d80ac45b7aad5d0Hiroshi Yamauchi MemMap* mem_map = MemMap::MapAnonymous( 107bbdc5bc5fd5141711879a6c85d80ac45b7aad5d0Hiroshi Yamauchi "mark sweep sweep array free buffer", nullptr, 108bbdc5bc5fd5141711879a6c85d80ac45b7aad5d0Hiroshi Yamauchi RoundUp(kSweepArrayChunkFreeSize * sizeof(mirror::Object*), kPageSize), 1095c42c29b89286e5efa4a4613132b09051ce5945bVladimir Marko PROT_READ | PROT_WRITE, false, false, &error_msg); 110bbdc5bc5fd5141711879a6c85d80ac45b7aad5d0Hiroshi Yamauchi CHECK(mem_map != nullptr) << "Couldn't allocate sweep array free buffer: " << error_msg; 111bbdc5bc5fd5141711879a6c85d80ac45b7aad5d0Hiroshi Yamauchi sweep_array_free_buffer_mem_map_.reset(mem_map); 1125301cd241b4d8afbfc1211e107c41f1b15c6bd48Mathieu Chartier} 113b3bd5f07884f5a1f2b84224363b1372d7c28d447Elliott Hughes 1142b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartiervoid MarkSweep::InitializePhase() { 115f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 116eb8167a4f4d27fce0530f6724ab8032610cd146bMathieu Chartier mark_stack_ = heap_->GetMarkStack(); 117e53225c7b8c98f8fc3855fc70f718e7f8abab307Mathieu Chartier DCHECK(mark_stack_ != nullptr); 1188d562103c3a3452fb15ef4b1c64df767b70507a4Mathieu Chartier immune_region_.Reset(); 1193e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers class_count_.StoreRelaxed(0); 1203e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers array_count_.StoreRelaxed(0); 1213e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers other_count_.StoreRelaxed(0); 1223e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers large_object_test_.StoreRelaxed(0); 1233e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers large_object_mark_.StoreRelaxed(0); 1243e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers overhead_time_ .StoreRelaxed(0); 1253e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers work_chunks_created_.StoreRelaxed(0); 1263e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers work_chunks_deleted_.StoreRelaxed(0); 1273e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers reference_count_.StoreRelaxed(0); 1283e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers mark_null_count_.StoreRelaxed(0); 1293e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers mark_immune_count_.StoreRelaxed(0); 1303e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers mark_fastpath_count_.StoreRelaxed(0); 1313e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers mark_slowpath_count_.StoreRelaxed(0); 1320e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier { 133eb8167a4f4d27fce0530f6724ab8032610cd146bMathieu Chartier // TODO: I don't think we should need heap bitmap lock to Get the mark bitmap. 1340e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier ReaderMutexLock mu(Thread::Current(), *Locks::heap_bitmap_lock_); 1350e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier mark_bitmap_ = heap_->GetMarkBitmap(); 1360e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier } 13710fb83ad7442c8cf3356a89ec918e0786f110981Mathieu Chartier if (!GetCurrentIteration()->GetClearSoftReferences()) { 138df386c551405ce9668e827584f744c6f098761faHiroshi Yamauchi // Always clear soft references if a non-sticky collection. 13910fb83ad7442c8cf3356a89ec918e0786f110981Mathieu Chartier GetCurrentIteration()->SetClearSoftReferences(GetGcType() != collector::kGcTypeSticky); 140df386c551405ce9668e827584f744c6f098761faHiroshi Yamauchi } 1416f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier} 1426f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier 1436f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartiervoid MarkSweep::RunPhases() { 1446f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier Thread* self = Thread::Current(); 1456f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier InitializePhase(); 1466f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier Locks::mutator_lock_->AssertNotHeld(self); 1476f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier if (IsConcurrent()) { 1486f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier GetHeap()->PreGcVerification(this); 1496f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier { 1506f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier ReaderMutexLock mu(self, *Locks::mutator_lock_); 1516f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier MarkingPhase(); 1526f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier } 1536f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier ScopedPause pause(this); 1546f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier GetHeap()->PrePauseRosAllocVerification(this); 1556f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier PausePhase(); 1566f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier RevokeAllThreadLocalBuffers(); 1576f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier } else { 1586f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier ScopedPause pause(this); 1596f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier GetHeap()->PreGcVerificationPaused(this); 1606f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier MarkingPhase(); 1616f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier GetHeap()->PrePauseRosAllocVerification(this); 1626f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier PausePhase(); 1636f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier RevokeAllThreadLocalBuffers(); 1646f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier } 1656f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier { 1666f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier // Sweeping always done concurrently, even for non concurrent mark sweep. 1676f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier ReaderMutexLock mu(self, *Locks::mutator_lock_); 1686f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier ReclaimPhase(); 1696f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier } 1706f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier GetHeap()->PostGcVerification(this); 1716f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier FinishPhase(); 1722b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier} 1732b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier 1742b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartiervoid MarkSweep::ProcessReferences(Thread* self) { 1758e56c7e41cb37e2eaf553503968a01ff893b135bMathieu Chartier WriterMutexLock mu(self, *Locks::heap_bitmap_lock_); 17678f7b4c04ab6e8b5581921bc95b67a9beee1c246Mathieu Chartier GetHeap()->GetReferenceProcessor()->ProcessReferences( 17710fb83ad7442c8cf3356a89ec918e0786f110981Mathieu Chartier true, GetTimings(), GetCurrentIteration()->GetClearSoftReferences(), 17810fb83ad7442c8cf3356a89ec918e0786f110981Mathieu Chartier &HeapReferenceMarkedCallback, &MarkObjectCallback, &ProcessMarkStackCallback, this); 1791ad2784ad9f311ebf9fe0677d33818648f423f9cMathieu Chartier} 1801ad2784ad9f311ebf9fe0677d33818648f423f9cMathieu Chartier 1810f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartiervoid MarkSweep::PausePhase() { 182f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t("(Paused)PausePhase", GetTimings()); 1832b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier Thread* self = Thread::Current(); 1842b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier Locks::mutator_lock_->AssertExclusiveHeld(self); 1850f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier if (IsConcurrent()) { 1860f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier // Handle the dirty objects if we are a concurrent GC. 1872b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier WriterMutexLock mu(self, *Locks::heap_bitmap_lock_); 1882b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier // Re-mark root set. 1892b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier ReMarkRoots(); 1902b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier // Scan dirty objects, this is only required if we are not doing concurrent GC. 19194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier RecursiveMarkDirtyObjects(true, accounting::CardTable::kCardDirty); 1922b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier } 1930f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier { 194f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t2("SwapStacks", GetTimings()); 1952b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier WriterMutexLock mu(self, *Locks::heap_bitmap_lock_); 1960f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier heap_->SwapStacks(self); 1970f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier live_stack_freeze_size_ = heap_->GetLiveStack()->Size(); 1980f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier // Need to revoke all the thread local allocation stacks since we just swapped the allocation 1990f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier // stacks and don't want anybody to allocate into the live stack. 200c22c59ef8513b4cbbfd25073d1afbf58196b522aMathieu Chartier RevokeAllThreadLocalAllocationStacks(self); 2012b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier } 2020f72e4136aecaf6976fdb55916bbd7b6d5c9c77bMathieu Chartier heap_->PreSweepingGcVerification(this); 2036f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier // Disallow new system weaks to prevent a race which occurs when someone adds a new system 2046f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier // weak before we sweep them. Since this new system weak may not be marked, the GC may 2056f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier // incorrectly sweep it. This also fixes a race where interning may attempt to return a strong 2066f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier // reference to a string that is about to be swept. 2076f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier Runtime::Current()->DisallowNewSystemWeaks(); 20878f7b4c04ab6e8b5581921bc95b67a9beee1c246Mathieu Chartier // Enable the reference processing slow path, needs to be done with mutators paused since there 20978f7b4c04ab6e8b5581921bc95b67a9beee1c246Mathieu Chartier // is no lock in the GetReferent fast path. 21078f7b4c04ab6e8b5581921bc95b67a9beee1c246Mathieu Chartier GetHeap()->GetReferenceProcessor()->EnableSlowPath(); 2112b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier} 2122b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier 213dda54f59271464b5a72bf4cde6d9010e8dc1f337Mathieu Chartiervoid MarkSweep::PreCleanCards() { 214dda54f59271464b5a72bf4cde6d9010e8dc1f337Mathieu Chartier // Don't do this for non concurrent GCs since they don't have any dirty cards. 215dda54f59271464b5a72bf4cde6d9010e8dc1f337Mathieu Chartier if (kPreCleanCards && IsConcurrent()) { 216f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 217dda54f59271464b5a72bf4cde6d9010e8dc1f337Mathieu Chartier Thread* self = Thread::Current(); 218dda54f59271464b5a72bf4cde6d9010e8dc1f337Mathieu Chartier CHECK(!Locks::mutator_lock_->IsExclusiveHeld(self)); 219dda54f59271464b5a72bf4cde6d9010e8dc1f337Mathieu Chartier // Process dirty cards and add dirty cards to mod union tables, also ages cards. 2204add3b4fa38ec42bb3c71d01cf70bce8e9a9fb4eLei Li heap_->ProcessCards(GetTimings(), false, true, false); 221eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartier // The checkpoint root marking is required to avoid a race condition which occurs if the 222eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartier // following happens during a reference write: 223eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartier // 1. mutator dirties the card (write barrier) 224eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartier // 2. GC ages the card (the above ProcessCards call) 225eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartier // 3. GC scans the object (the RecursiveMarkDirtyObjects call below) 226eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartier // 4. mutator writes the value (corresponding to the write barrier in 1.) 227eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartier // This causes the GC to age the card but not necessarily mark the reference which the mutator 228eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartier // wrote into the object stored in the card. 229eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartier // Having the checkpoint fixes this issue since it ensures that the card mark and the 230eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartier // reference write are visible to the GC before the card is scanned (this is due to locks being 231eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartier // acquired / released in the checkpoint code). 232eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartier // The other roots are also marked to help reduce the pause. 2330f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier MarkRootsCheckpoint(self, false); 234dda54f59271464b5a72bf4cde6d9010e8dc1f337Mathieu Chartier MarkNonThreadRoots(); 235893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartier MarkConcurrentRoots( 236893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartier static_cast<VisitRootFlags>(kVisitRootFlagClearRootLog | kVisitRootFlagNewRoots)); 237dda54f59271464b5a72bf4cde6d9010e8dc1f337Mathieu Chartier // Process the newly aged cards. 238dda54f59271464b5a72bf4cde6d9010e8dc1f337Mathieu Chartier RecursiveMarkDirtyObjects(false, accounting::CardTable::kCardDirty - 1); 239dda54f59271464b5a72bf4cde6d9010e8dc1f337Mathieu Chartier // TODO: Empty allocation stack to reduce the number of objects we need to test / mark as live 240dda54f59271464b5a72bf4cde6d9010e8dc1f337Mathieu Chartier // in the next GC. 241dda54f59271464b5a72bf4cde6d9010e8dc1f337Mathieu Chartier } 242dda54f59271464b5a72bf4cde6d9010e8dc1f337Mathieu Chartier} 243dda54f59271464b5a72bf4cde6d9010e8dc1f337Mathieu Chartier 244c22c59ef8513b4cbbfd25073d1afbf58196b522aMathieu Chartiervoid MarkSweep::RevokeAllThreadLocalAllocationStacks(Thread* self) { 245c22c59ef8513b4cbbfd25073d1afbf58196b522aMathieu Chartier if (kUseThreadLocalAllocationStack) { 246f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 247c22c59ef8513b4cbbfd25073d1afbf58196b522aMathieu Chartier Locks::mutator_lock_->AssertExclusiveHeld(self); 248c22c59ef8513b4cbbfd25073d1afbf58196b522aMathieu Chartier heap_->RevokeAllThreadLocalAllocationStacks(self); 249c22c59ef8513b4cbbfd25073d1afbf58196b522aMathieu Chartier } 250c22c59ef8513b4cbbfd25073d1afbf58196b522aMathieu Chartier} 251c22c59ef8513b4cbbfd25073d1afbf58196b522aMathieu Chartier 2522b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartiervoid MarkSweep::MarkingPhase() { 253f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 2542b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier Thread* self = Thread::Current(); 2552b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier BindBitmaps(); 2560e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier FindDefaultSpaceBitmap(); 2572b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier // Process dirty cards and add dirty cards to mod union tables. 2584add3b4fa38ec42bb3c71d01cf70bce8e9a9fb4eLei Li // If the GC type is non sticky, then we just clear the cards instead of ageing them. 2594add3b4fa38ec42bb3c71d01cf70bce8e9a9fb4eLei Li heap_->ProcessCards(GetTimings(), false, true, GetGcType() != kGcTypeSticky); 2602b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier WriterMutexLock mu(self, *Locks::heap_bitmap_lock_); 261893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartier MarkRoots(self); 2622b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier MarkReachableObjects(); 263dda54f59271464b5a72bf4cde6d9010e8dc1f337Mathieu Chartier // Pre-clean dirtied cards to reduce pauses. 264dda54f59271464b5a72bf4cde6d9010e8dc1f337Mathieu Chartier PreCleanCards(); 2652b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier} 2662b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier 26711409ae81a3eaf84d7fd2b3c85b8b06d2bae27f0Mathieu Chartiervoid MarkSweep::UpdateAndMarkModUnion() { 26811409ae81a3eaf84d7fd2b3c85b8b06d2bae27f0Mathieu Chartier for (const auto& space : heap_->GetContinuousSpaces()) { 2698d562103c3a3452fb15ef4b1c64df767b70507a4Mathieu Chartier if (immune_region_.ContainsSpace(space)) { 27011409ae81a3eaf84d7fd2b3c85b8b06d2bae27f0Mathieu Chartier const char* name = space->IsZygoteSpace() ? "UpdateAndMarkZygoteModUnionTable" : 27111409ae81a3eaf84d7fd2b3c85b8b06d2bae27f0Mathieu Chartier "UpdateAndMarkImageModUnionTable"; 272f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(name, GetTimings()); 27311409ae81a3eaf84d7fd2b3c85b8b06d2bae27f0Mathieu Chartier accounting::ModUnionTable* mod_union_table = heap_->FindModUnionTableFromSpace(space); 27411409ae81a3eaf84d7fd2b3c85b8b06d2bae27f0Mathieu Chartier CHECK(mod_union_table != nullptr); 275407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier mod_union_table->UpdateAndMarkReferences(MarkHeapReferenceCallback, this); 27611409ae81a3eaf84d7fd2b3c85b8b06d2bae27f0Mathieu Chartier } 27711409ae81a3eaf84d7fd2b3c85b8b06d2bae27f0Mathieu Chartier } 27811409ae81a3eaf84d7fd2b3c85b8b06d2bae27f0Mathieu Chartier} 27911409ae81a3eaf84d7fd2b3c85b8b06d2bae27f0Mathieu Chartier 2802b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartiervoid MarkSweep::MarkReachableObjects() { 2814aeec176eaf11fe03f342aadcbb79142230270edMathieu Chartier UpdateAndMarkModUnion(); 2822b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier // Recursively mark all the non-image bits set in the mark bitmap. 2832b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier RecursiveMark(); 2842b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier} 2852b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier 2862b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartiervoid MarkSweep::ReclaimPhase() { 287f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 288720ef7680573c1afd12f99f02eee3045daee5168Mathieu Chartier Thread* self = Thread::Current(); 28978f7b4c04ab6e8b5581921bc95b67a9beee1c246Mathieu Chartier // Process the references concurrently. 29078f7b4c04ab6e8b5581921bc95b67a9beee1c246Mathieu Chartier ProcessReferences(self); 2910f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier SweepSystemWeaks(self); 2926f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier Runtime::Current()->AllowNewSystemWeaks(); 2932b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier { 2942b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier WriterMutexLock mu(self, *Locks::heap_bitmap_lock_); 2954460a84be92b5a94ecfb5c650aef4945ab849c93Hiroshi Yamauchi GetHeap()->RecordFreeRevoke(); 2962b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier // Reclaim unmarked objects. 2971d54e73444e017d3a65234e0f193846f3e27472bIan Rogers Sweep(false); 2982b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier // Swap the live and mark bitmaps for each space which we modified space. This is an 2992b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier // optimization that enables us to not clear live bits inside of the sweep. Only swaps unbound 3002b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier // bitmaps. 3012b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier SwapBitmaps(); 3022b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier // Unbind the live and mark bitmaps. 303a1602f28c0e3127ad511712d4b08db89737ae901Mathieu Chartier GetHeap()->UnBindBitmaps(); 3042b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier } 3052b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier} 3062b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier 3070e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartiervoid MarkSweep::FindDefaultSpaceBitmap() { 308f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 30902e25119b15a6f619f17db99f5d05124a5807ff3Mathieu Chartier for (const auto& space : GetHeap()->GetContinuousSpaces()) { 310a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartier accounting::ContinuousSpaceBitmap* bitmap = space->GetMarkBitmap(); 311bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier // We want to have the main space instead of non moving if possible. 312590fee9e8972f872301c2d16a575d579ee564beeMathieu Chartier if (bitmap != nullptr && 313590fee9e8972f872301c2d16a575d579ee564beeMathieu Chartier space->GetGcRetentionPolicy() == space::kGcRetentionPolicyAlwaysCollect) { 3140e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier current_space_bitmap_ = bitmap; 315bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier // If we are not the non moving space exit the loop early since this will be good enough. 316bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier if (space != heap_->GetNonMovingSpace()) { 317bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier break; 318bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier } 319b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier } 320b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier } 3214c13a3ff475f206c4d0a86ee2595c45392fd942fMathieu Chartier CHECK(current_space_bitmap_ != nullptr) << "Could not find a default mark bitmap\n" 3224c13a3ff475f206c4d0a86ee2595c45392fd942fMathieu Chartier << heap_->DumpSpaces(); 32358551df3c2646ed507feec9e9eb3768085a76059Carl Shapiro} 32458551df3c2646ed507feec9e9eb3768085a76059Carl Shapiro 325ac86a7cad60c20a131011338057887bb64cbfd38Mathieu Chartiervoid MarkSweep::ExpandMarkStack() { 326ba311b4385fa3f382f01312a8cc97b52011232e3Mathieu Chartier ResizeMarkStack(mark_stack_->Capacity() * 2); 327ba311b4385fa3f382f01312a8cc97b52011232e3Mathieu Chartier} 328ba311b4385fa3f382f01312a8cc97b52011232e3Mathieu Chartier 329ba311b4385fa3f382f01312a8cc97b52011232e3Mathieu Chartiervoid MarkSweep::ResizeMarkStack(size_t new_size) { 330ac86a7cad60c20a131011338057887bb64cbfd38Mathieu Chartier // Rare case, no need to have Thread::Current be a parameter. 331ac86a7cad60c20a131011338057887bb64cbfd38Mathieu Chartier if (UNLIKELY(mark_stack_->Size() < mark_stack_->Capacity())) { 332ac86a7cad60c20a131011338057887bb64cbfd38Mathieu Chartier // Someone else acquired the lock and expanded the mark stack before us. 333ac86a7cad60c20a131011338057887bb64cbfd38Mathieu Chartier return; 334ac86a7cad60c20a131011338057887bb64cbfd38Mathieu Chartier } 335cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier std::vector<StackReference<Object>> temp(mark_stack_->Begin(), mark_stack_->End()); 336ba311b4385fa3f382f01312a8cc97b52011232e3Mathieu Chartier CHECK_LE(mark_stack_->Size(), new_size); 337ba311b4385fa3f382f01312a8cc97b52011232e3Mathieu Chartier mark_stack_->Resize(new_size); 338cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier for (auto& obj : temp) { 339cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier mark_stack_->PushBack(obj.AsMirrorPtr()); 340ac86a7cad60c20a131011338057887bb64cbfd38Mathieu Chartier } 341ac86a7cad60c20a131011338057887bb64cbfd38Mathieu Chartier} 342ac86a7cad60c20a131011338057887bb64cbfd38Mathieu Chartier 3430e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartierinline void MarkSweep::MarkObjectNonNullParallel(Object* obj) { 344bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier DCHECK(obj != nullptr); 345ac86a7cad60c20a131011338057887bb64cbfd38Mathieu Chartier if (MarkObjectParallel(obj)) { 346ba311b4385fa3f382f01312a8cc97b52011232e3Mathieu Chartier MutexLock mu(Thread::Current(), mark_stack_lock_); 347ba311b4385fa3f382f01312a8cc97b52011232e3Mathieu Chartier if (UNLIKELY(mark_stack_->Size() >= mark_stack_->Capacity())) { 348184e322fe8ddd75c844a1eb2eb1ca32bc02f2d45Mathieu Chartier ExpandMarkStack(); 349ac86a7cad60c20a131011338057887bb64cbfd38Mathieu Chartier } 350ba311b4385fa3f382f01312a8cc97b52011232e3Mathieu Chartier // The object must be pushed on to the mark stack. 3510e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier mark_stack_->PushBack(obj); 352ac86a7cad60c20a131011338057887bb64cbfd38Mathieu Chartier } 353ac86a7cad60c20a131011338057887bb64cbfd38Mathieu Chartier} 354ac86a7cad60c20a131011338057887bb64cbfd38Mathieu Chartier 3553bb57c7b41bf5419fe895e7aa664d8d430205ba8Mathieu Chartiermirror::Object* MarkSweep::MarkObjectCallback(mirror::Object* obj, void* arg) { 35639e3261168e7761fea6d873494d7c5d191285791Mathieu Chartier MarkSweep* mark_sweep = reinterpret_cast<MarkSweep*>(arg); 35739e3261168e7761fea6d873494d7c5d191285791Mathieu Chartier mark_sweep->MarkObject(obj); 35839e3261168e7761fea6d873494d7c5d191285791Mathieu Chartier return obj; 35939e3261168e7761fea6d873494d7c5d191285791Mathieu Chartier} 36039e3261168e7761fea6d873494d7c5d191285791Mathieu Chartier 361407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartiervoid MarkSweep::MarkHeapReferenceCallback(mirror::HeapReference<mirror::Object>* ref, void* arg) { 362407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier reinterpret_cast<MarkSweep*>(arg)->MarkObject(ref->AsMirrorPtr()); 363407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier} 364407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier 365308351ada0008b0cbe1a5afc31c302c975554ee4Mathieu Chartierbool MarkSweep::HeapReferenceMarkedCallback(mirror::HeapReference<mirror::Object>* ref, void* arg) { 366308351ada0008b0cbe1a5afc31c302c975554ee4Mathieu Chartier return reinterpret_cast<MarkSweep*>(arg)->IsMarked(ref->AsMirrorPtr()); 367308351ada0008b0cbe1a5afc31c302c975554ee4Mathieu Chartier} 368308351ada0008b0cbe1a5afc31c302c975554ee4Mathieu Chartier 369bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartierclass MarkSweepMarkObjectSlowPath { 370bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier public: 371bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier explicit MarkSweepMarkObjectSlowPath(MarkSweep* mark_sweep) : mark_sweep_(mark_sweep) { 372bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier } 373bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier 374bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier void operator()(const Object* obj) const ALWAYS_INLINE { 375bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier if (kProfileLargeObjects) { 376bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier // TODO: Differentiate between marking and testing somehow. 377bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier ++mark_sweep_->large_object_test_; 378bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier ++mark_sweep_->large_object_mark_; 379bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier } 380bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier space::LargeObjectSpace* large_object_space = mark_sweep_->GetHeap()->GetLargeObjectsSpace(); 381a17288e3b9dd6751005fed3386251d2d0949be74Mathieu Chartier if (UNLIKELY(obj == nullptr || !IsAligned<kPageSize>(obj) || 3822dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier (kIsDebugBuild && large_object_space != nullptr && 3832dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier !large_object_space->Contains(obj)))) { 384bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier LOG(ERROR) << "Tried to mark " << obj << " not contained by any spaces"; 385bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier LOG(ERROR) << "Attempting see if it's a bad root"; 386bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier mark_sweep_->VerifyRoots(); 387bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier LOG(FATAL) << "Can't mark invalid object"; 388bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier } 389bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier } 390bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier 391bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier private: 392bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier MarkSweep* const mark_sweep_; 393bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier}; 394bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier 3950e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartierinline void MarkSweep::MarkObjectNonNull(Object* obj) { 3960e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier DCHECK(obj != nullptr); 397624468cd401cc1ac0dd70c746301e0788a597759Hiroshi Yamauchi if (kUseBakerOrBrooksReadBarrier) { 398624468cd401cc1ac0dd70c746301e0788a597759Hiroshi Yamauchi // Verify all the objects have the correct pointer installed. 399624468cd401cc1ac0dd70c746301e0788a597759Hiroshi Yamauchi obj->AssertReadBarrierPointer(); 4009d04a20bde1b1855cefc64aebc1a44e253b1a13bHiroshi Yamauchi } 4018d562103c3a3452fb15ef4b1c64df767b70507a4Mathieu Chartier if (immune_region_.ContainsObject(obj)) { 4020e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier if (kCountMarkedObjects) { 4030e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier ++mark_immune_count_; 4040e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier } 405bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier DCHECK(mark_bitmap_->Test(obj)); 406bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier } else if (LIKELY(current_space_bitmap_->HasAddress(obj))) { 407bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier if (kCountMarkedObjects) { 408bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier ++mark_fastpath_count_; 409bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier } 410bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier if (UNLIKELY(!current_space_bitmap_->Set(obj))) { 411bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier PushOnMarkStack(obj); // This object was not previously marked. 412bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier } 413bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier } else { 4140e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier if (kCountMarkedObjects) { 4150e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier ++mark_slowpath_count_; 4160e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier } 417bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier MarkSweepMarkObjectSlowPath visitor(this); 418bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier // TODO: We already know that the object is not in the current_space_bitmap_ but MarkBitmap::Set 419bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier // will check again. 420bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier if (!mark_bitmap_->Set(obj, visitor)) { 421bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier PushOnMarkStack(obj); // Was not already marked, push. 422357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier } 4230e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier } 4240e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier} 4250e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier 4260e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartierinline void MarkSweep::PushOnMarkStack(Object* obj) { 4270e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier if (UNLIKELY(mark_stack_->Size() >= mark_stack_->Capacity())) { 4280e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier // Lock is not needed but is here anyways to please annotalysis. 4290e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier MutexLock mu(Thread::Current(), mark_stack_lock_); 4300e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier ExpandMarkStack(); 43169759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro } 4320e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier // The object must be pushed on to the mark stack. 4330e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier mark_stack_->PushBack(obj); 43469759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro} 43569759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro 43602b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartierinline bool MarkSweep::MarkObjectParallel(const Object* obj) { 4370e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier DCHECK(obj != nullptr); 438624468cd401cc1ac0dd70c746301e0788a597759Hiroshi Yamauchi if (kUseBakerOrBrooksReadBarrier) { 439624468cd401cc1ac0dd70c746301e0788a597759Hiroshi Yamauchi // Verify all the objects have the correct pointer installed. 440624468cd401cc1ac0dd70c746301e0788a597759Hiroshi Yamauchi obj->AssertReadBarrierPointer(); 4419d04a20bde1b1855cefc64aebc1a44e253b1a13bHiroshi Yamauchi } 4428d562103c3a3452fb15ef4b1c64df767b70507a4Mathieu Chartier if (immune_region_.ContainsObject(obj)) { 44302b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier DCHECK(IsMarked(obj)); 44402b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier return false; 44502b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier } 44602b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier // Try to take advantage of locality of references within a space, failing this find the space 44702b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier // the hard way. 448a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartier accounting::ContinuousSpaceBitmap* object_bitmap = current_space_bitmap_; 449bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier if (LIKELY(object_bitmap->HasAddress(obj))) { 450bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier return !object_bitmap->AtomicTestAndSet(obj); 45102b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier } 452bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier MarkSweepMarkObjectSlowPath visitor(this); 453bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier return !mark_bitmap_->AtomicTestAndSet(obj, visitor); 45402b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier} 45502b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier 4560e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier// Used to mark objects when processing the mark stack. If an object is null, it is not marked. 4570e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartierinline void MarkSweep::MarkObject(Object* obj) { 4580e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier if (obj != nullptr) { 4599642c96bd5a1ccc4e221de9c0af4a545af8182d2Mathieu Chartier MarkObjectNonNull(obj); 4600e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier } else if (kCountMarkedObjects) { 4610e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier ++mark_null_count_; 46269759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro } 46369759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro} 46469759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro 465bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartierclass VerifyRootMarkedVisitor : public SingleRootVisitor { 466bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier public: 467bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier explicit VerifyRootMarkedVisitor(MarkSweep* collector) : collector_(collector) { } 468ac86a7cad60c20a131011338057887bb64cbfd38Mathieu Chartier 469bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier void VisitRoot(mirror::Object* root, const RootInfo& info) OVERRIDE 470bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier SHARED_LOCKS_REQUIRED(Locks::mutator_lock_, Locks::heap_bitmap_lock_) { 471bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier CHECK(collector_->IsMarked(root)) << info.ToString(); 472bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier } 473bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier 474bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier private: 475bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier MarkSweep* const collector_; 476bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier}; 477893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartier 478bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartiervoid MarkSweep::VisitRoots(mirror::Object*** roots, size_t count, 479bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier const RootInfo& info ATTRIBUTE_UNUSED) { 480bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier for (size_t i = 0; i < count; ++i) { 481bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier MarkObjectNonNull(*roots[i]); 482bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier } 483815873ecc312b1d231acce71e1a16f42cdaf09f2Mathieu Chartier} 484815873ecc312b1d231acce71e1a16f42cdaf09f2Mathieu Chartier 485bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartiervoid MarkSweep::VisitRoots(mirror::CompressedReference<mirror::Object>** roots, size_t count, 486bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier const RootInfo& info ATTRIBUTE_UNUSED) { 487bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier for (size_t i = 0; i < count; ++i) { 488bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier MarkObjectNonNull(roots[i]->AsMirrorPtr()); 489bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier } 4906f1c94968ada57da433debf8e2d1b38a80ceb510Mathieu Chartier} 4916f1c94968ada57da433debf8e2d1b38a80ceb510Mathieu Chartier 492bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartierclass VerifyRootVisitor : public SingleRootVisitor { 493bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier public: 494bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier void VisitRoot(mirror::Object* root, const RootInfo& info) OVERRIDE 495bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier SHARED_LOCKS_REQUIRED(Locks::mutator_lock_, Locks::heap_bitmap_lock_) { 4969086b65b2ad35dd39a8afc62d535be8217208d08Mathieu Chartier // See if the root is on any space bitmap. 4979086b65b2ad35dd39a8afc62d535be8217208d08Mathieu Chartier auto* heap = Runtime::Current()->GetHeap(); 4989086b65b2ad35dd39a8afc62d535be8217208d08Mathieu Chartier if (heap->GetLiveBitmap()->GetContinuousSpaceBitmap(root) == nullptr) { 4999086b65b2ad35dd39a8afc62d535be8217208d08Mathieu Chartier space::LargeObjectSpace* large_object_space = heap->GetLargeObjectsSpace(); 5009086b65b2ad35dd39a8afc62d535be8217208d08Mathieu Chartier if (large_object_space != nullptr && !large_object_space->Contains(root)) { 5019086b65b2ad35dd39a8afc62d535be8217208d08Mathieu Chartier LOG(ERROR) << "Found invalid root: " << root << " " << info; 5029086b65b2ad35dd39a8afc62d535be8217208d08Mathieu Chartier } 5036f1c94968ada57da433debf8e2d1b38a80ceb510Mathieu Chartier } 5046f1c94968ada57da433debf8e2d1b38a80ceb510Mathieu Chartier } 5059086b65b2ad35dd39a8afc62d535be8217208d08Mathieu Chartier}; 5066f1c94968ada57da433debf8e2d1b38a80ceb510Mathieu Chartier 5076f1c94968ada57da433debf8e2d1b38a80ceb510Mathieu Chartiervoid MarkSweep::VerifyRoots() { 5089086b65b2ad35dd39a8afc62d535be8217208d08Mathieu Chartier VerifyRootVisitor visitor; 509bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier Runtime::Current()->GetThreadList()->VisitRoots(&visitor); 5106f1c94968ada57da433debf8e2d1b38a80ceb510Mathieu Chartier} 5116f1c94968ada57da433debf8e2d1b38a80ceb510Mathieu Chartier 512893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartiervoid MarkSweep::MarkRoots(Thread* self) { 513f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 514893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartier if (Locks::mutator_lock_->IsExclusiveHeld(self)) { 515893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartier // If we exclusively hold the mutator lock, all threads must be suspended. 516bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier Runtime::Current()->VisitRoots(this); 517893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartier RevokeAllThreadLocalAllocationStacks(self); 518893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartier } else { 5190f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier MarkRootsCheckpoint(self, kRevokeRosAllocThreadLocalBuffersAtCheckpoint); 520893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartier // At this point the live stack should no longer have any mutators which push into it. 521893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartier MarkNonThreadRoots(); 522893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartier MarkConcurrentRoots( 523893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartier static_cast<VisitRootFlags>(kVisitRootFlagAllRoots | kVisitRootFlagStartLoggingNewRoots)); 524893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartier } 5259ebae1f30b84dfd8dab4144f80eebec4f8fc8851Mathieu Chartier} 5269ebae1f30b84dfd8dab4144f80eebec4f8fc8851Mathieu Chartier 527858f1c5fd5e528d0b16040ced74d4636046a42d8Mathieu Chartiervoid MarkSweep::MarkNonThreadRoots() { 528f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 529bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier Runtime::Current()->VisitNonThreadRoots(this); 530858f1c5fd5e528d0b16040ced74d4636046a42d8Mathieu Chartier} 531858f1c5fd5e528d0b16040ced74d4636046a42d8Mathieu Chartier 532893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartiervoid MarkSweep::MarkConcurrentRoots(VisitRootFlags flags) { 533f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 5341d54e73444e017d3a65234e0f193846f3e27472bIan Rogers // Visit all runtime roots and clear dirty flags. 535bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier Runtime::Current()->VisitConcurrentRoots(this, flags); 53669759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro} 53769759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro 53802b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartierclass ScanObjectVisitor { 539cc236d74772dda5a4161d9bc5f497fd3d956eb87Mathieu Chartier public: 54094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier explicit ScanObjectVisitor(MarkSweep* const mark_sweep) ALWAYS_INLINE 54194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier : mark_sweep_(mark_sweep) {} 542cc236d74772dda5a4161d9bc5f497fd3d956eb87Mathieu Chartier 543407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier void operator()(Object* obj) const ALWAYS_INLINE SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) 544407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) { 54594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier if (kCheckLocks) { 5462b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier Locks::mutator_lock_->AssertSharedHeld(Thread::Current()); 5472b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier Locks::heap_bitmap_lock_->AssertExclusiveHeld(Thread::Current()); 5482b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier } 54902b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier mark_sweep_->ScanObject(obj); 550cc236d74772dda5a4161d9bc5f497fd3d956eb87Mathieu Chartier } 551cc236d74772dda5a4161d9bc5f497fd3d956eb87Mathieu Chartier 552cc236d74772dda5a4161d9bc5f497fd3d956eb87Mathieu Chartier private: 553cc236d74772dda5a4161d9bc5f497fd3d956eb87Mathieu Chartier MarkSweep* const mark_sweep_; 554cc236d74772dda5a4161d9bc5f497fd3d956eb87Mathieu Chartier}; 555cc236d74772dda5a4161d9bc5f497fd3d956eb87Mathieu Chartier 556407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartierclass DelayReferenceReferentVisitor { 557407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier public: 558407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier explicit DelayReferenceReferentVisitor(MarkSweep* collector) : collector_(collector) { 559407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier } 560407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier 561407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier void operator()(mirror::Class* klass, mirror::Reference* ref) const 562407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) 563407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) { 564407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier collector_->DelayReferenceReferent(klass, ref); 565407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier } 566407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier 567407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier private: 568407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier MarkSweep* const collector_; 569407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier}; 570407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier 57194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartiertemplate <bool kUseFinger = false> 57294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartierclass MarkStackTask : public Task { 57394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier public: 57494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier MarkStackTask(ThreadPool* thread_pool, MarkSweep* mark_sweep, size_t mark_stack_size, 575cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier StackReference<Object>* mark_stack) 57694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier : mark_sweep_(mark_sweep), 57794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier thread_pool_(thread_pool), 57894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier mark_stack_pos_(mark_stack_size) { 57994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // We may have to copy part of an existing mark stack when another mark stack overflows. 58094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier if (mark_stack_size != 0) { 5812cebb24bfc3247d3e9be138a3350106737455918Mathieu Chartier DCHECK(mark_stack != nullptr); 58294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // TODO: Check performance? 58394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier std::copy(mark_stack, mark_stack + mark_stack_size, mark_stack_); 58494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 58594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier if (kCountTasks) { 58694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier ++mark_sweep_->work_chunks_created_; 5871d54e73444e017d3a65234e0f193846f3e27472bIan Rogers } 588262e5ffa1d4b23f23af3dea762a71a0af4bfd4a9Mathieu Chartier } 589262e5ffa1d4b23f23af3dea762a71a0af4bfd4a9Mathieu Chartier 59094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier static const size_t kMaxSize = 1 * KB; 591cc236d74772dda5a4161d9bc5f497fd3d956eb87Mathieu Chartier 59294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier protected: 593407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier class MarkObjectParallelVisitor { 594407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier public: 595407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier explicit MarkObjectParallelVisitor(MarkStackTask<kUseFinger>* chunk_task, 596407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier MarkSweep* mark_sweep) ALWAYS_INLINE 597407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier : chunk_task_(chunk_task), mark_sweep_(mark_sweep) {} 598407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier 599407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier void operator()(Object* obj, MemberOffset offset, bool /* static */) const ALWAYS_INLINE 600407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 601b0fa5dc7769c1e054032f39de0a3f6d6dd06f8cfIan Rogers mirror::Object* ref = obj->GetFieldObject<mirror::Object>(offset); 602407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier if (ref != nullptr && mark_sweep_->MarkObjectParallel(ref)) { 603407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier if (kUseFinger) { 604c7df66e2cb124d261cf3b0691a09a3b6e357b6f1Yabin Cui std::atomic_thread_fence(std::memory_order_seq_cst); 605407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier if (reinterpret_cast<uintptr_t>(ref) >= 6063e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers static_cast<uintptr_t>(mark_sweep_->atomic_finger_.LoadRelaxed())) { 607407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier return; 608407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier } 609407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier } 610407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier chunk_task_->MarkStackPush(ref); 611407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier } 612407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier } 613407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier 614407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier private: 615407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier MarkStackTask<kUseFinger>* const chunk_task_; 616407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier MarkSweep* const mark_sweep_; 617407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier }; 618407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier 61994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier class ScanObjectParallelVisitor { 62094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier public: 62194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier explicit ScanObjectParallelVisitor(MarkStackTask<kUseFinger>* chunk_task) ALWAYS_INLINE 62294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier : chunk_task_(chunk_task) {} 62394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 624407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier // No thread safety analysis since multiple threads will use this visitor. 625407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier void operator()(Object* obj) const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) 626407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) { 627407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier MarkSweep* const mark_sweep = chunk_task_->mark_sweep_; 628407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier MarkObjectParallelVisitor mark_visitor(chunk_task_, mark_sweep); 629407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier DelayReferenceReferentVisitor ref_visitor(mark_sweep); 630407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier mark_sweep->ScanObjectVisit(obj, mark_visitor, ref_visitor); 63194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 63294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 63394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier private: 63494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier MarkStackTask<kUseFinger>* const chunk_task_; 63594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier }; 63694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 63794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier virtual ~MarkStackTask() { 63894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Make sure that we have cleared our mark stack. 63994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier DCHECK_EQ(mark_stack_pos_, 0U); 64094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier if (kCountTasks) { 64194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier ++mark_sweep_->work_chunks_deleted_; 6422b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier } 643cc236d74772dda5a4161d9bc5f497fd3d956eb87Mathieu Chartier } 644cc236d74772dda5a4161d9bc5f497fd3d956eb87Mathieu Chartier 64594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier MarkSweep* const mark_sweep_; 64694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier ThreadPool* const thread_pool_; 64794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Thread local mark stack for this task. 648cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier StackReference<Object> mark_stack_[kMaxSize]; 64994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Mark stack position. 65094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier size_t mark_stack_pos_; 65194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 652cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier ALWAYS_INLINE void MarkStackPush(Object* obj) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 65394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier if (UNLIKELY(mark_stack_pos_ == kMaxSize)) { 65494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Mark stack overflow, give 1/2 the stack to the thread pool as a new work task. 65594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier mark_stack_pos_ /= 2; 65694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier auto* task = new MarkStackTask(thread_pool_, mark_sweep_, kMaxSize - mark_stack_pos_, 65794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier mark_stack_ + mark_stack_pos_); 65894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier thread_pool_->AddTask(Thread::Current(), task); 65994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 66094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier DCHECK(obj != nullptr); 6610e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier DCHECK_LT(mark_stack_pos_, kMaxSize); 662cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier mark_stack_[mark_stack_pos_++].Assign(obj); 66394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 66494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 66594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier virtual void Finalize() { 66694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier delete this; 66794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 66894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 66994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Scans all of the objects 670407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier virtual void Run(Thread* self) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) 671407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) { 6726a3c1fcb4ba42ad4d5d142c17a3712a6ddd3866fIan Rogers UNUSED(self); 67394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier ScanObjectParallelVisitor visitor(this); 67494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // TODO: Tune this. 67594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier static const size_t kFifoSize = 4; 6760e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier BoundedFifoPowerOfTwo<Object*, kFifoSize> prefetch_fifo; 67794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier for (;;) { 6780e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier Object* obj = nullptr; 67994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier if (kUseMarkStackPrefetch) { 68094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier while (mark_stack_pos_ != 0 && prefetch_fifo.size() < kFifoSize) { 681cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier Object* const mark_stack_obj = mark_stack_[--mark_stack_pos_].AsMirrorPtr(); 682277ccbd200ea43590dfc06a93ae184a765327ad0Andreas Gampe DCHECK(mark_stack_obj != nullptr); 683277ccbd200ea43590dfc06a93ae184a765327ad0Andreas Gampe __builtin_prefetch(mark_stack_obj); 684277ccbd200ea43590dfc06a93ae184a765327ad0Andreas Gampe prefetch_fifo.push_back(mark_stack_obj); 68594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 68694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier if (UNLIKELY(prefetch_fifo.empty())) { 68794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier break; 68894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 68994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier obj = prefetch_fifo.front(); 69094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier prefetch_fifo.pop_front(); 69194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } else { 69294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier if (UNLIKELY(mark_stack_pos_ == 0)) { 69394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier break; 69494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 695cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier obj = mark_stack_[--mark_stack_pos_].AsMirrorPtr(); 69694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 69711409ae81a3eaf84d7fd2b3c85b8b06d2bae27f0Mathieu Chartier DCHECK(obj != nullptr); 6980e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier visitor(obj); 69994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 70094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 70194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier}; 70294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 70394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartierclass CardScanTask : public MarkStackTask<false> { 70494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier public: 705a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartier CardScanTask(ThreadPool* thread_pool, MarkSweep* mark_sweep, 706a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartier accounting::ContinuousSpaceBitmap* bitmap, 70713735955f39b3b304c37d2b2840663c131262c18Ian Rogers uint8_t* begin, uint8_t* end, uint8_t minimum_age, size_t mark_stack_size, 708cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier StackReference<Object>* mark_stack_obj, bool clear_card) 70994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier : MarkStackTask<false>(thread_pool, mark_sweep, mark_stack_size, mark_stack_obj), 71094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier bitmap_(bitmap), 71194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier begin_(begin), 71294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier end_(end), 713727b294b4091cf3cc2f8137cd654552f477fe46aLei Li minimum_age_(minimum_age), clear_card_(clear_card) { 71494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 71594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 71694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier protected: 717a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartier accounting::ContinuousSpaceBitmap* const bitmap_; 71813735955f39b3b304c37d2b2840663c131262c18Ian Rogers uint8_t* const begin_; 71913735955f39b3b304c37d2b2840663c131262c18Ian Rogers uint8_t* const end_; 72013735955f39b3b304c37d2b2840663c131262c18Ian Rogers const uint8_t minimum_age_; 721727b294b4091cf3cc2f8137cd654552f477fe46aLei Li const bool clear_card_; 72294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 72394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier virtual void Finalize() { 72494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier delete this; 72594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 72694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 72794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier virtual void Run(Thread* self) NO_THREAD_SAFETY_ANALYSIS { 72894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier ScanObjectParallelVisitor visitor(this); 72994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier accounting::CardTable* card_table = mark_sweep_->GetHeap()->GetCardTable(); 730727b294b4091cf3cc2f8137cd654552f477fe46aLei Li size_t cards_scanned = clear_card_ ? 731727b294b4091cf3cc2f8137cd654552f477fe46aLei Li card_table->Scan<true>(bitmap_, begin_, end_, visitor, minimum_age_) : 732727b294b4091cf3cc2f8137cd654552f477fe46aLei Li card_table->Scan<false>(bitmap_, begin_, end_, visitor, minimum_age_); 7330f72e4136aecaf6976fdb55916bbd7b6d5c9c77bMathieu Chartier VLOG(heap) << "Parallel scanning cards " << reinterpret_cast<void*>(begin_) << " - " 7340f72e4136aecaf6976fdb55916bbd7b6d5c9c77bMathieu Chartier << reinterpret_cast<void*>(end_) << " = " << cards_scanned; 73594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Finish by emptying our local mark stack. 73694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier MarkStackTask::Run(self); 73794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 738cc236d74772dda5a4161d9bc5f497fd3d956eb87Mathieu Chartier}; 739cc236d74772dda5a4161d9bc5f497fd3d956eb87Mathieu Chartier 7402775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartiersize_t MarkSweep::GetThreadCount(bool paused) const { 7412775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier if (heap_->GetThreadPool() == nullptr || !heap_->CareAboutPauseTimes()) { 742bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier return 1; 7432775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier } 74410d6886c9ce3ed87431cf10d376a69c23950fa61Mathieu Chartier return (paused ? heap_->GetParallelGCThreadCount() : heap_->GetConcGCThreadCount()) + 1; 7452775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier} 7462775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier 74713735955f39b3b304c37d2b2840663c131262c18Ian Rogersvoid MarkSweep::ScanGrayObjects(bool paused, uint8_t minimum_age) { 74894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier accounting::CardTable* card_table = GetHeap()->GetCardTable(); 74994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier ThreadPool* thread_pool = GetHeap()->GetThreadPool(); 7502775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier size_t thread_count = GetThreadCount(paused); 7512775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier // The parallel version with only one thread is faster for card scanning, TODO: fix. 752bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier if (kParallelCardScan && thread_count > 1) { 753720ef7680573c1afd12f99f02eee3045daee5168Mathieu Chartier Thread* self = Thread::Current(); 75494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Can't have a different split for each space since multiple spaces can have their cards being 75594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // scanned at the same time. 756f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(paused ? "(Paused)ScanGrayObjects" : __FUNCTION__, 757f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier GetTimings()); 75894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Try to take some of the mark stack since we can pass this off to the worker tasks. 759cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier StackReference<Object>* mark_stack_begin = mark_stack_->Begin(); 760cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier StackReference<Object>* mark_stack_end = mark_stack_->End(); 761720ef7680573c1afd12f99f02eee3045daee5168Mathieu Chartier const size_t mark_stack_size = mark_stack_end - mark_stack_begin; 76294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Estimated number of work tasks we will create. 76394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier const size_t mark_stack_tasks = GetHeap()->GetContinuousSpaces().size() * thread_count; 76494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier DCHECK_NE(mark_stack_tasks, 0U); 76594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier const size_t mark_stack_delta = std::min(CardScanTask::kMaxSize / 2, 76694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier mark_stack_size / mark_stack_tasks + 1); 76794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier for (const auto& space : GetHeap()->GetContinuousSpaces()) { 768590fee9e8972f872301c2d16a575d579ee564beeMathieu Chartier if (space->GetMarkBitmap() == nullptr) { 769590fee9e8972f872301c2d16a575d579ee564beeMathieu Chartier continue; 770590fee9e8972f872301c2d16a575d579ee564beeMathieu Chartier } 77113735955f39b3b304c37d2b2840663c131262c18Ian Rogers uint8_t* card_begin = space->Begin(); 77213735955f39b3b304c37d2b2840663c131262c18Ian Rogers uint8_t* card_end = space->End(); 7730941b0423537a6a5d7c1df6dd23e9864ea8f319cHiroshi Yamauchi // Align up the end address. For example, the image space's end 7740941b0423537a6a5d7c1df6dd23e9864ea8f319cHiroshi Yamauchi // may not be card-size-aligned. 7750941b0423537a6a5d7c1df6dd23e9864ea8f319cHiroshi Yamauchi card_end = AlignUp(card_end, accounting::CardTable::kCardSize); 7760941b0423537a6a5d7c1df6dd23e9864ea8f319cHiroshi Yamauchi DCHECK(IsAligned<accounting::CardTable::kCardSize>(card_begin)); 7770941b0423537a6a5d7c1df6dd23e9864ea8f319cHiroshi Yamauchi DCHECK(IsAligned<accounting::CardTable::kCardSize>(card_end)); 77894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Calculate how many bytes of heap we will scan, 77994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier const size_t address_range = card_end - card_begin; 78094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Calculate how much address range each task gets. 78194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier const size_t card_delta = RoundUp(address_range / thread_count + 1, 78294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier accounting::CardTable::kCardSize); 783727b294b4091cf3cc2f8137cd654552f477fe46aLei Li // If paused and the space is neither zygote nor image space, we could clear the dirty 784727b294b4091cf3cc2f8137cd654552f477fe46aLei Li // cards to avoid accumulating them to increase card scanning load in the following GC 785727b294b4091cf3cc2f8137cd654552f477fe46aLei Li // cycles. We need to keep dirty cards of image space and zygote space in order to track 786727b294b4091cf3cc2f8137cd654552f477fe46aLei Li // references to the other spaces. 787727b294b4091cf3cc2f8137cd654552f477fe46aLei Li bool clear_card = paused && !space->IsZygoteSpace() && !space->IsImageSpace(); 78894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Create the worker tasks for this space. 78994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier while (card_begin != card_end) { 79094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Add a range of cards. 79194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier size_t addr_remaining = card_end - card_begin; 79294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier size_t card_increment = std::min(card_delta, addr_remaining); 79394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Take from the back of the mark stack. 79494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier size_t mark_stack_remaining = mark_stack_end - mark_stack_begin; 79594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier size_t mark_stack_increment = std::min(mark_stack_delta, mark_stack_remaining); 79694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier mark_stack_end -= mark_stack_increment; 79794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier mark_stack_->PopBackCount(static_cast<int32_t>(mark_stack_increment)); 7980e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier DCHECK_EQ(mark_stack_end, mark_stack_->End()); 79994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Add the new task to the thread pool. 80094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier auto* task = new CardScanTask(thread_pool, this, space->GetMarkBitmap(), card_begin, 80194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier card_begin + card_increment, minimum_age, 802727b294b4091cf3cc2f8137cd654552f477fe46aLei Li mark_stack_increment, mark_stack_end, clear_card); 80394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier thread_pool->AddTask(self, task); 80494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier card_begin += card_increment; 80594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 80694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 8070f72e4136aecaf6976fdb55916bbd7b6d5c9c77bMathieu Chartier 8080941b0423537a6a5d7c1df6dd23e9864ea8f319cHiroshi Yamauchi // Note: the card scan below may dirty new cards (and scan them) 8090941b0423537a6a5d7c1df6dd23e9864ea8f319cHiroshi Yamauchi // as a side effect when a Reference object is encountered and 8100941b0423537a6a5d7c1df6dd23e9864ea8f319cHiroshi Yamauchi // queued during the marking. See b/11465268. 8112775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier thread_pool->SetMaxActiveWorkers(thread_count - 1); 81294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier thread_pool->StartWorkers(self); 8132775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier thread_pool->Wait(self, true, true); 81494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier thread_pool->StopWorkers(self); 81594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } else { 81694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier for (const auto& space : GetHeap()->GetContinuousSpaces()) { 817590fee9e8972f872301c2d16a575d579ee564beeMathieu Chartier if (space->GetMarkBitmap() != nullptr) { 818590fee9e8972f872301c2d16a575d579ee564beeMathieu Chartier // Image spaces are handled properly since live == marked for them. 819f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier const char* name = nullptr; 820590fee9e8972f872301c2d16a575d579ee564beeMathieu Chartier switch (space->GetGcRetentionPolicy()) { 821f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier case space::kGcRetentionPolicyNeverCollect: 822f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier name = paused ? "(Paused)ScanGrayImageSpaceObjects" : "ScanGrayImageSpaceObjects"; 823f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier break; 824f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier case space::kGcRetentionPolicyFullCollect: 825f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier name = paused ? "(Paused)ScanGrayZygoteSpaceObjects" : "ScanGrayZygoteSpaceObjects"; 826f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier break; 827f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier case space::kGcRetentionPolicyAlwaysCollect: 828f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier name = paused ? "(Paused)ScanGrayAllocSpaceObjects" : "ScanGrayAllocSpaceObjects"; 829f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier break; 830f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier default: 831f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier LOG(FATAL) << "Unreachable"; 8322c4257be8191c5eefde744e8965fcefc80a0a97dIan Rogers UNREACHABLE(); 833f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier } 834f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(name, GetTimings()); 835590fee9e8972f872301c2d16a575d579ee564beeMathieu Chartier ScanObjectVisitor visitor(this); 836727b294b4091cf3cc2f8137cd654552f477fe46aLei Li bool clear_card = paused && !space->IsZygoteSpace() && !space->IsImageSpace(); 837727b294b4091cf3cc2f8137cd654552f477fe46aLei Li if (clear_card) { 838727b294b4091cf3cc2f8137cd654552f477fe46aLei Li card_table->Scan<true>(space->GetMarkBitmap(), space->Begin(), space->End(), visitor, 839727b294b4091cf3cc2f8137cd654552f477fe46aLei Li minimum_age); 840727b294b4091cf3cc2f8137cd654552f477fe46aLei Li } else { 841727b294b4091cf3cc2f8137cd654552f477fe46aLei Li card_table->Scan<false>(space->GetMarkBitmap(), space->Begin(), space->End(), visitor, 842727b294b4091cf3cc2f8137cd654552f477fe46aLei Li minimum_age); 843727b294b4091cf3cc2f8137cd654552f477fe46aLei Li } 844590fee9e8972f872301c2d16a575d579ee564beeMathieu Chartier } 84594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 84694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 84794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier} 84894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 84994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartierclass RecursiveMarkTask : public MarkStackTask<false> { 85094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier public: 85194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier RecursiveMarkTask(ThreadPool* thread_pool, MarkSweep* mark_sweep, 852a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartier accounting::ContinuousSpaceBitmap* bitmap, uintptr_t begin, uintptr_t end) 8532cebb24bfc3247d3e9be138a3350106737455918Mathieu Chartier : MarkStackTask<false>(thread_pool, mark_sweep, 0, nullptr), bitmap_(bitmap), begin_(begin), 85494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier end_(end) { 85594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 85694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 85794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier protected: 858a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartier accounting::ContinuousSpaceBitmap* const bitmap_; 85994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier const uintptr_t begin_; 86094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier const uintptr_t end_; 86194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 86294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier virtual void Finalize() { 86394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier delete this; 86494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 86594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 86694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Scans all of the objects 86794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier virtual void Run(Thread* self) NO_THREAD_SAFETY_ANALYSIS { 86894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier ScanObjectParallelVisitor visitor(this); 86994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier bitmap_->VisitMarkedRange(begin_, end_, visitor); 87094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Finish by emptying our local mark stack. 87194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier MarkStackTask::Run(self); 87294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 87394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier}; 87494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 87558551df3c2646ed507feec9e9eb3768085a76059Carl Shapiro// Populates the mark stack based on the set of marked objects and 87658551df3c2646ed507feec9e9eb3768085a76059Carl Shapiro// recursively marks until the mark stack is emptied. 8772b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartiervoid MarkSweep::RecursiveMark() { 878f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 879a1602f28c0e3127ad511712d4b08db89737ae901Mathieu Chartier // RecursiveMark will build the lists of known instances of the Reference classes. See 880a1602f28c0e3127ad511712d4b08db89737ae901Mathieu Chartier // DelayReferenceReferent for details. 88194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier if (kUseRecursiveMark) { 88294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier const bool partial = GetGcType() == kGcTypePartial; 88394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier ScanObjectVisitor scan_visitor(this); 88494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier auto* self = Thread::Current(); 88594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier ThreadPool* thread_pool = heap_->GetThreadPool(); 8862775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier size_t thread_count = GetThreadCount(false); 8872775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier const bool parallel = kParallelRecursiveMark && thread_count > 1; 88894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier mark_stack_->Reset(); 88902e25119b15a6f619f17db99f5d05124a5807ff3Mathieu Chartier for (const auto& space : GetHeap()->GetContinuousSpaces()) { 8901d54e73444e017d3a65234e0f193846f3e27472bIan Rogers if ((space->GetGcRetentionPolicy() == space::kGcRetentionPolicyAlwaysCollect) || 8911d54e73444e017d3a65234e0f193846f3e27472bIan Rogers (!partial && space->GetGcRetentionPolicy() == space::kGcRetentionPolicyFullCollect)) { 8920e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier current_space_bitmap_ = space->GetMarkBitmap(); 8930e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier if (current_space_bitmap_ == nullptr) { 894590fee9e8972f872301c2d16a575d579ee564beeMathieu Chartier continue; 8952b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier } 89694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier if (parallel) { 89794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // We will use the mark stack the future. 89894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // CHECK(mark_stack_->IsEmpty()); 89994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // This function does not handle heap end increasing, so we must use the space end. 90094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier uintptr_t begin = reinterpret_cast<uintptr_t>(space->Begin()); 90194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier uintptr_t end = reinterpret_cast<uintptr_t>(space->End()); 9023e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers atomic_finger_.StoreRelaxed(AtomicInteger::MaxValue()); 90394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 90494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Create a few worker tasks. 9052775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier const size_t n = thread_count * 2; 90694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier while (begin != end) { 90794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier uintptr_t start = begin; 90894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier uintptr_t delta = (end - begin) / n; 90994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier delta = RoundUp(delta, KB); 91094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier if (delta < 16 * KB) delta = end - begin; 91194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier begin += delta; 9120e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier auto* task = new RecursiveMarkTask(thread_pool, this, current_space_bitmap_, start, 91394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier begin); 91494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier thread_pool->AddTask(self, task); 91594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 9162775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier thread_pool->SetMaxActiveWorkers(thread_count - 1); 91794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier thread_pool->StartWorkers(self); 9182775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier thread_pool->Wait(self, true, true); 91994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier thread_pool->StopWorkers(self); 92094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } else { 92194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // This function does not handle heap end increasing, so we must use the space end. 92294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier uintptr_t begin = reinterpret_cast<uintptr_t>(space->Begin()); 92394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier uintptr_t end = reinterpret_cast<uintptr_t>(space->End()); 9240e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier current_space_bitmap_->VisitMarkedRange(begin, end, scan_visitor); 92594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 926357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier } 927357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier } 928357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier } 92994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier ProcessMarkStack(false); 93058551df3c2646ed507feec9e9eb3768085a76059Carl Shapiro} 93158551df3c2646ed507feec9e9eb3768085a76059Carl Shapiro 93283c8ee000d525017ead8753fce6bc1020249b96aMathieu Chartiermirror::Object* MarkSweep::IsMarkedCallback(mirror::Object* object, void* arg) { 9335712d5d04640925970db9c98938ffaf806b3962cMathieu Chartier if (reinterpret_cast<MarkSweep*>(arg)->IsMarked(object)) { 9346aa3df965395566ed6a4fec4af37c2b7577992e9Mathieu Chartier return object; 9356aa3df965395566ed6a4fec4af37c2b7577992e9Mathieu Chartier } 9366aa3df965395566ed6a4fec4af37c2b7577992e9Mathieu Chartier return nullptr; 937357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier} 938357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier 93913735955f39b3b304c37d2b2840663c131262c18Ian Rogersvoid MarkSweep::RecursiveMarkDirtyObjects(bool paused, uint8_t minimum_age) { 94094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier ScanGrayObjects(paused, minimum_age); 94194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier ProcessMarkStack(paused); 942262e5ffa1d4b23f23af3dea762a71a0af4bfd4a9Mathieu Chartier} 943262e5ffa1d4b23f23af3dea762a71a0af4bfd4a9Mathieu Chartier 94458551df3c2646ed507feec9e9eb3768085a76059Carl Shapirovoid MarkSweep::ReMarkRoots() { 945f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 946893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartier Locks::mutator_lock_->AssertExclusiveHeld(Thread::Current()); 947bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier Runtime::Current()->VisitRoots(this, static_cast<VisitRootFlags>( 948bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier kVisitRootFlagNewRoots | kVisitRootFlagStopLoggingNewRoots | kVisitRootFlagClearRootLog)); 9497bf9f190cd33a7e2f8584299eb889e9df66e0323Mathieu Chartier if (kVerifyRootsMarked) { 950277ccbd200ea43590dfc06a93ae184a765327ad0Andreas Gampe TimingLogger::ScopedTiming t2("(Paused)VerifyRoots", GetTimings()); 951bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier VerifyRootMarkedVisitor visitor(this); 952bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier Runtime::Current()->VisitRoots(&visitor); 953893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartier } 95458551df3c2646ed507feec9e9eb3768085a76059Carl Shapiro} 95558551df3c2646ed507feec9e9eb3768085a76059Carl Shapiro 9560f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartiervoid MarkSweep::SweepSystemWeaks(Thread* self) { 957f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 9580f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier WriterMutexLock mu(self, *Locks::heap_bitmap_lock_); 9590f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier Runtime::Current()->SweepSystemWeaks(IsMarkedCallback, this); 96069759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro} 96169759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro 9626aa3df965395566ed6a4fec4af37c2b7577992e9Mathieu Chartiermirror::Object* MarkSweep::VerifySystemWeakIsLiveCallback(Object* obj, void* arg) { 963c7b83a0d8ac73bdfff751619ae2a34948e3534b7Mathieu Chartier reinterpret_cast<MarkSweep*>(arg)->VerifyIsLive(obj); 964c7b83a0d8ac73bdfff751619ae2a34948e3534b7Mathieu Chartier // We don't actually want to sweep the object, so lets return "marked" 9656aa3df965395566ed6a4fec4af37c2b7577992e9Mathieu Chartier return obj; 966c7b83a0d8ac73bdfff751619ae2a34948e3534b7Mathieu Chartier} 967c7b83a0d8ac73bdfff751619ae2a34948e3534b7Mathieu Chartier 968c7b83a0d8ac73bdfff751619ae2a34948e3534b7Mathieu Chartiervoid MarkSweep::VerifyIsLive(const Object* obj) { 9694aeec176eaf11fe03f342aadcbb79142230270edMathieu Chartier if (!heap_->GetLiveBitmap()->Test(obj)) { 970cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier // TODO: Consider live stack? Has this code bitrotted? 971cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier CHECK(!heap_->allocation_stack_->Contains(obj)) 972cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier << "Found dead object " << obj << "\n" << heap_->DumpSpaces(); 973c7b83a0d8ac73bdfff751619ae2a34948e3534b7Mathieu Chartier } 974c7b83a0d8ac73bdfff751619ae2a34948e3534b7Mathieu Chartier} 975c7b83a0d8ac73bdfff751619ae2a34948e3534b7Mathieu Chartier 976c7b83a0d8ac73bdfff751619ae2a34948e3534b7Mathieu Chartiervoid MarkSweep::VerifySystemWeaks() { 977f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 9786aa3df965395566ed6a4fec4af37c2b7577992e9Mathieu Chartier // Verify system weaks, uses a special object visitor which returns the input object. 9796aa3df965395566ed6a4fec4af37c2b7577992e9Mathieu Chartier Runtime::Current()->SweepSystemWeaks(VerifySystemWeakIsLiveCallback, this); 980c7b83a0d8ac73bdfff751619ae2a34948e3534b7Mathieu Chartier} 981c7b83a0d8ac73bdfff751619ae2a34948e3534b7Mathieu Chartier 982bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartierclass CheckpointMarkThreadRoots : public Closure, public RootVisitor { 983858f1c5fd5e528d0b16040ced74d4636046a42d8Mathieu Chartier public: 9840f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier explicit CheckpointMarkThreadRoots(MarkSweep* mark_sweep, 9850f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier bool revoke_ros_alloc_thread_local_buffers_at_checkpoint) 9860f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier : mark_sweep_(mark_sweep), 9870f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier revoke_ros_alloc_thread_local_buffers_at_checkpoint_( 9880f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier revoke_ros_alloc_thread_local_buffers_at_checkpoint) { 9890f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier } 990858f1c5fd5e528d0b16040ced74d4636046a42d8Mathieu Chartier 991bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier void VisitRoots(mirror::Object*** roots, size_t count, const RootInfo& info ATTRIBUTE_UNUSED) 992bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier OVERRIDE SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) 993bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) { 994bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier for (size_t i = 0; i < count; ++i) { 995bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier mark_sweep_->MarkObjectNonNullParallel(*roots[i]); 996bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier } 997bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier } 998bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier 999bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier void VisitRoots(mirror::CompressedReference<mirror::Object>** roots, size_t count, 1000bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier const RootInfo& info ATTRIBUTE_UNUSED) 1001bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier OVERRIDE SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) 1002bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) { 1003bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier for (size_t i = 0; i < count; ++i) { 1004bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier mark_sweep_->MarkObjectNonNullParallel(roots[i]->AsMirrorPtr()); 1005bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier } 1006bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier } 1007bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier 10084aeec176eaf11fe03f342aadcbb79142230270edMathieu Chartier virtual void Run(Thread* thread) OVERRIDE NO_THREAD_SAFETY_ANALYSIS { 10093f9667022788ba1effcd1e47fc9e3decc4db569dMathieu Chartier ATRACE_BEGIN("Marking thread roots"); 1010858f1c5fd5e528d0b16040ced74d4636046a42d8Mathieu Chartier // Note: self is not necessarily equal to thread since thread may be suspended. 1011bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier Thread* const self = Thread::Current(); 1012d22d54849c96760aa1efa259d6dcfbace54da2afMathieu Chartier CHECK(thread == self || thread->IsSuspended() || thread->GetState() == kWaitingPerformingGc) 1013d22d54849c96760aa1efa259d6dcfbace54da2afMathieu Chartier << thread->GetState() << " thread " << thread << " self " << self; 1014bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier thread->VisitRoots(this); 10153f9667022788ba1effcd1e47fc9e3decc4db569dMathieu Chartier ATRACE_END(); 10160f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier if (revoke_ros_alloc_thread_local_buffers_at_checkpoint_) { 10170f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier ATRACE_BEGIN("RevokeRosAllocThreadLocalBuffers"); 1018c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchi mark_sweep_->GetHeap()->RevokeRosAllocThreadLocalBuffers(thread); 10190f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier ATRACE_END(); 1020c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchi } 1021dd9943d4466b052ef6c5ee5b32187adb48cbce74Lei Li // If thread is a running mutator, then act on behalf of the garbage collector. 1022dd9943d4466b052ef6c5ee5b32187adb48cbce74Lei Li // See the code in ThreadList::RunCheckpoint. 1023dd9943d4466b052ef6c5ee5b32187adb48cbce74Lei Li if (thread->GetState() == kRunnable) { 1024dd9943d4466b052ef6c5ee5b32187adb48cbce74Lei Li mark_sweep_->GetBarrier().Pass(self); 1025dd9943d4466b052ef6c5ee5b32187adb48cbce74Lei Li } 1026858f1c5fd5e528d0b16040ced74d4636046a42d8Mathieu Chartier } 1027858f1c5fd5e528d0b16040ced74d4636046a42d8Mathieu Chartier 1028858f1c5fd5e528d0b16040ced74d4636046a42d8Mathieu Chartier private: 10294aeec176eaf11fe03f342aadcbb79142230270edMathieu Chartier MarkSweep* const mark_sweep_; 10300f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier const bool revoke_ros_alloc_thread_local_buffers_at_checkpoint_; 1031858f1c5fd5e528d0b16040ced74d4636046a42d8Mathieu Chartier}; 1032858f1c5fd5e528d0b16040ced74d4636046a42d8Mathieu Chartier 10330f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartiervoid MarkSweep::MarkRootsCheckpoint(Thread* self, 10340f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier bool revoke_ros_alloc_thread_local_buffers_at_checkpoint) { 1035f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 10360f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier CheckpointMarkThreadRoots check_point(this, revoke_ros_alloc_thread_local_buffers_at_checkpoint); 1037858f1c5fd5e528d0b16040ced74d4636046a42d8Mathieu Chartier ThreadList* thread_list = Runtime::Current()->GetThreadList(); 10381d54e73444e017d3a65234e0f193846f3e27472bIan Rogers // Request the check point is run on all threads returning a count of the threads that must 10391d54e73444e017d3a65234e0f193846f3e27472bIan Rogers // run through the barrier including self. 10401d54e73444e017d3a65234e0f193846f3e27472bIan Rogers size_t barrier_count = thread_list->RunCheckpoint(&check_point); 10411d54e73444e017d3a65234e0f193846f3e27472bIan Rogers // Release locks then wait for all mutator threads to pass the barrier. 1042dd9943d4466b052ef6c5ee5b32187adb48cbce74Lei Li // If there are no threads to wait which implys that all the checkpoint functions are finished, 1043dd9943d4466b052ef6c5ee5b32187adb48cbce74Lei Li // then no need to release locks. 1044dd9943d4466b052ef6c5ee5b32187adb48cbce74Lei Li if (barrier_count == 0) { 1045dd9943d4466b052ef6c5ee5b32187adb48cbce74Lei Li return; 1046dd9943d4466b052ef6c5ee5b32187adb48cbce74Lei Li } 10471d54e73444e017d3a65234e0f193846f3e27472bIan Rogers Locks::heap_bitmap_lock_->ExclusiveUnlock(self); 10481d54e73444e017d3a65234e0f193846f3e27472bIan Rogers Locks::mutator_lock_->SharedUnlock(self); 10494aeec176eaf11fe03f342aadcbb79142230270edMathieu Chartier { 10504aeec176eaf11fe03f342aadcbb79142230270edMathieu Chartier ScopedThreadStateChange tsc(self, kWaitingForCheckPointsToRun); 10514aeec176eaf11fe03f342aadcbb79142230270edMathieu Chartier gc_barrier_->Increment(self, barrier_count); 10524aeec176eaf11fe03f342aadcbb79142230270edMathieu Chartier } 10531d54e73444e017d3a65234e0f193846f3e27472bIan Rogers Locks::mutator_lock_->SharedLock(self); 10541d54e73444e017d3a65234e0f193846f3e27472bIan Rogers Locks::heap_bitmap_lock_->ExclusiveLock(self); 1055858f1c5fd5e528d0b16040ced74d4636046a42d8Mathieu Chartier} 1056858f1c5fd5e528d0b16040ced74d4636046a42d8Mathieu Chartier 10571d54e73444e017d3a65234e0f193846f3e27472bIan Rogersvoid MarkSweep::SweepArray(accounting::ObjectStack* allocations, bool swap_bitmaps) { 1058f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 1059e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier Thread* self = Thread::Current(); 1060bbdc5bc5fd5141711879a6c85d80ac45b7aad5d0Hiroshi Yamauchi mirror::Object** chunk_free_buffer = reinterpret_cast<mirror::Object**>( 1061bbdc5bc5fd5141711879a6c85d80ac45b7aad5d0Hiroshi Yamauchi sweep_array_free_buffer_mem_map_->BaseBegin()); 1062e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier size_t chunk_free_pos = 0; 106310fb83ad7442c8cf3356a89ec918e0786f110981Mathieu Chartier ObjectBytePair freed; 106410fb83ad7442c8cf3356a89ec918e0786f110981Mathieu Chartier ObjectBytePair freed_los; 1065e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier // How many objects are left in the array, modified after each space is swept. 1066cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier StackReference<Object>* objects = allocations->Begin(); 1067e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier size_t count = allocations->Size(); 1068e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier // Change the order to ensure that the non-moving space last swept as an optimization. 1069e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier std::vector<space::ContinuousSpace*> sweep_spaces; 1070e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier space::ContinuousSpace* non_moving_space = nullptr; 1071e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier for (space::ContinuousSpace* space : heap_->GetContinuousSpaces()) { 10728d562103c3a3452fb15ef4b1c64df767b70507a4Mathieu Chartier if (space->IsAllocSpace() && !immune_region_.ContainsSpace(space) && 10738d562103c3a3452fb15ef4b1c64df767b70507a4Mathieu Chartier space->GetLiveBitmap() != nullptr) { 1074e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier if (space == heap_->GetNonMovingSpace()) { 1075e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier non_moving_space = space; 1076e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier } else { 1077e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier sweep_spaces.push_back(space); 1078e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier } 1079e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier } 1080e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier } 1081e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier // Unlikely to sweep a significant amount of non_movable objects, so we do these after the after 1082e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier // the other alloc spaces as an optimization. 1083e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier if (non_moving_space != nullptr) { 1084e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier sweep_spaces.push_back(non_moving_space); 1085e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier } 1086e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier // Start by sweeping the continuous spaces. 1087e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier for (space::ContinuousSpace* space : sweep_spaces) { 1088e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier space::AllocSpace* alloc_space = space->AsAllocSpace(); 1089a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartier accounting::ContinuousSpaceBitmap* live_bitmap = space->GetLiveBitmap(); 1090a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartier accounting::ContinuousSpaceBitmap* mark_bitmap = space->GetMarkBitmap(); 1091e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier if (swap_bitmaps) { 1092e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier std::swap(live_bitmap, mark_bitmap); 1093e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier } 1094cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier StackReference<Object>* out = objects; 1095e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier for (size_t i = 0; i < count; ++i) { 1096cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier Object* const obj = objects[i].AsMirrorPtr(); 1097f5b0e20b5b31f5f5465784adcf2a204dcd69c7fdHiroshi Yamauchi if (kUseThreadLocalAllocationStack && obj == nullptr) { 1098f5b0e20b5b31f5f5465784adcf2a204dcd69c7fdHiroshi Yamauchi continue; 1099f5b0e20b5b31f5f5465784adcf2a204dcd69c7fdHiroshi Yamauchi } 1100e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier if (space->HasAddress(obj)) { 1101e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier // This object is in the space, remove it from the array and add it to the sweep buffer 1102e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier // if needed. 1103e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier if (!mark_bitmap->Test(obj)) { 1104e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier if (chunk_free_pos >= kSweepArrayChunkFreeSize) { 1105277ccbd200ea43590dfc06a93ae184a765327ad0Andreas Gampe TimingLogger::ScopedTiming t2("FreeList", GetTimings()); 110610fb83ad7442c8cf3356a89ec918e0786f110981Mathieu Chartier freed.objects += chunk_free_pos; 110710fb83ad7442c8cf3356a89ec918e0786f110981Mathieu Chartier freed.bytes += alloc_space->FreeList(self, chunk_free_pos, chunk_free_buffer); 1108e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier chunk_free_pos = 0; 1109e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier } 1110e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier chunk_free_buffer[chunk_free_pos++] = obj; 1111e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier } 1112e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier } else { 1113cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier (out++)->Assign(obj); 1114e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier } 1115e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier } 1116e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier if (chunk_free_pos > 0) { 1117277ccbd200ea43590dfc06a93ae184a765327ad0Andreas Gampe TimingLogger::ScopedTiming t2("FreeList", GetTimings()); 111810fb83ad7442c8cf3356a89ec918e0786f110981Mathieu Chartier freed.objects += chunk_free_pos; 111910fb83ad7442c8cf3356a89ec918e0786f110981Mathieu Chartier freed.bytes += alloc_space->FreeList(self, chunk_free_pos, chunk_free_buffer); 1120e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier chunk_free_pos = 0; 1121e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier } 1122e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier // All of the references which space contained are no longer in the allocation stack, update 1123e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier // the count. 1124e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier count = out - objects; 1125e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier } 1126e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier // Handle the large object space. 11271d54e73444e017d3a65234e0f193846f3e27472bIan Rogers space::LargeObjectSpace* large_object_space = GetHeap()->GetLargeObjectsSpace(); 11282dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier if (large_object_space != nullptr) { 11292dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier accounting::LargeObjectBitmap* large_live_objects = large_object_space->GetLiveBitmap(); 11302dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier accounting::LargeObjectBitmap* large_mark_objects = large_object_space->GetMarkBitmap(); 11312dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier if (swap_bitmaps) { 11322dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier std::swap(large_live_objects, large_mark_objects); 1133f5b0e20b5b31f5f5465784adcf2a204dcd69c7fdHiroshi Yamauchi } 11342dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier for (size_t i = 0; i < count; ++i) { 1135cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier Object* const obj = objects[i].AsMirrorPtr(); 11362dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier // Handle large objects. 11372dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier if (kUseThreadLocalAllocationStack && obj == nullptr) { 11382dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier continue; 11392dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier } 11402dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier if (!large_mark_objects->Test(obj)) { 11412dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier ++freed_los.objects; 11422dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier freed_los.bytes += large_object_space->Free(self, obj); 11432dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier } 1144357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier } 1145357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier } 1146f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier { 1147277ccbd200ea43590dfc06a93ae184a765327ad0Andreas Gampe TimingLogger::ScopedTiming t2("RecordFree", GetTimings()); 1148f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier RecordFree(freed); 1149f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier RecordFreeLOS(freed_los); 1150277ccbd200ea43590dfc06a93ae184a765327ad0Andreas Gampe t2.NewTiming("ResetStack"); 1151f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier allocations->Reset(); 1152f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier } 1153c5f17732d8144491c642776b6b48c85dfadf4b52Ian Rogers sweep_array_free_buffer_mem_map_->MadviseDontNeedAndZero(); 1154357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier} 1155357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier 11561d54e73444e017d3a65234e0f193846f3e27472bIan Rogersvoid MarkSweep::Sweep(bool swap_bitmaps) { 1157f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 11580f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier // Ensure that nobody inserted items in the live stack after we swapped the stacks. 11590f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier CHECK_GE(live_stack_freeze_size_, GetHeap()->GetLiveStack()->Size()); 1160f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier { 1161f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t2("MarkAllocStackAsLive", GetTimings()); 1162f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier // Mark everything allocated since the last as GC live so that we can sweep concurrently, 1163f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier // knowing that new allocations won't be marked as live. 1164f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier accounting::ObjectStack* live_stack = heap_->GetLiveStack(); 1165f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier heap_->MarkAllocStackAsLive(live_stack); 1166f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier live_stack->Reset(); 1167f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier DCHECK(mark_stack_->IsEmpty()); 1168f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier } 116902e25119b15a6f619f17db99f5d05124a5807ff3Mathieu Chartier for (const auto& space : GetHeap()->GetContinuousSpaces()) { 1170a1602f28c0e3127ad511712d4b08db89737ae901Mathieu Chartier if (space->IsContinuousMemMapAllocSpace()) { 1171a1602f28c0e3127ad511712d4b08db89737ae901Mathieu Chartier space::ContinuousMemMapAllocSpace* alloc_space = space->AsContinuousMemMapAllocSpace(); 1172f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming split( 117310fb83ad7442c8cf3356a89ec918e0786f110981Mathieu Chartier alloc_space->IsZygoteSpace() ? "SweepZygoteSpace" : "SweepMallocSpace", GetTimings()); 117410fb83ad7442c8cf3356a89ec918e0786f110981Mathieu Chartier RecordFree(alloc_space->Sweep(swap_bitmaps)); 117558551df3c2646ed507feec9e9eb3768085a76059Carl Shapiro } 117658551df3c2646ed507feec9e9eb3768085a76059Carl Shapiro } 11772b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier SweepLargeObjects(swap_bitmaps); 117858551df3c2646ed507feec9e9eb3768085a76059Carl Shapiro} 117958551df3c2646ed507feec9e9eb3768085a76059Carl Shapiro 1180e0f0cb3d855cb5e926452b5e1ec8457adc4e454eMathieu Chartiervoid MarkSweep::SweepLargeObjects(bool swap_bitmaps) { 11812dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier space::LargeObjectSpace* los = heap_->GetLargeObjectsSpace(); 11822dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier if (los != nullptr) { 11832dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier TimingLogger::ScopedTiming split(__FUNCTION__, GetTimings()); 11842dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier RecordFreeLOS(los->Sweep(swap_bitmaps)); 11852dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier } 1186e0f0cb3d855cb5e926452b5e1ec8457adc4e454eMathieu Chartier} 1187e0f0cb3d855cb5e926452b5e1ec8457adc4e454eMathieu Chartier 1188407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier// Process the "referent" field in a java.lang.ref.Reference. If the referent has not yet been 1189407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier// marked, put it on the appropriate list in the heap for later processing. 1190407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartiervoid MarkSweep::DelayReferenceReferent(mirror::Class* klass, mirror::Reference* ref) { 11910e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier if (kCountJavaLangRefs) { 11920e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier ++reference_count_; 11930e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier } 1194308351ada0008b0cbe1a5afc31c302c975554ee4Mathieu Chartier heap_->GetReferenceProcessor()->DelayReferenceReferent(klass, ref, &HeapReferenceMarkedCallback, 1195308351ada0008b0cbe1a5afc31c302c975554ee4Mathieu Chartier this); 119669759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro} 119769759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro 119802b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartierclass MarkObjectVisitor { 119902b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier public: 1200407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier explicit MarkObjectVisitor(MarkSweep* const mark_sweep) ALWAYS_INLINE : mark_sweep_(mark_sweep) { 1201407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier } 120202b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier 1203407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier void operator()(Object* obj, MemberOffset offset, bool /* is_static */) const 1204407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier ALWAYS_INLINE SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) 1205407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) { 120694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier if (kCheckLocks) { 12072b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier Locks::mutator_lock_->AssertSharedHeld(Thread::Current()); 12082b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier Locks::heap_bitmap_lock_->AssertExclusiveHeld(Thread::Current()); 12092b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier } 1210b0fa5dc7769c1e054032f39de0a3f6d6dd06f8cfIan Rogers mark_sweep_->MarkObject(obj->GetFieldObject<mirror::Object>(offset)); 121102b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier } 121202b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier 121302b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier private: 121402b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier MarkSweep* const mark_sweep_; 121502b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier}; 121602b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier 121769759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro// Scans an object reference. Determines the type of the reference 121869759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro// and dispatches to a specialized scanning routine. 1219590fee9e8972f872301c2d16a575d579ee564beeMathieu Chartiervoid MarkSweep::ScanObject(Object* obj) { 1220407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier MarkObjectVisitor mark_visitor(this); 1221407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier DelayReferenceReferentVisitor ref_visitor(this); 1222407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier ScanObjectVisit(obj, mark_visitor, ref_visitor); 122302b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier} 122402b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier 122578f7b4c04ab6e8b5581921bc95b67a9beee1c246Mathieu Chartiervoid MarkSweep::ProcessMarkStackCallback(void* arg) { 122678f7b4c04ab6e8b5581921bc95b67a9beee1c246Mathieu Chartier reinterpret_cast<MarkSweep*>(arg)->ProcessMarkStack(false); 12273bb57c7b41bf5419fe895e7aa664d8d430205ba8Mathieu Chartier} 12283bb57c7b41bf5419fe895e7aa664d8d430205ba8Mathieu Chartier 12292775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartiervoid MarkSweep::ProcessMarkStackParallel(size_t thread_count) { 123002b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier Thread* self = Thread::Current(); 123102b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier ThreadPool* thread_pool = GetHeap()->GetThreadPool(); 12322775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier const size_t chunk_size = std::min(mark_stack_->Size() / thread_count + 1, 12332775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier static_cast<size_t>(MarkStackTask<false>::kMaxSize)); 123494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier CHECK_GT(chunk_size, 0U); 123594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Split the current mark stack up into work tasks. 1236cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier for (auto* it = mark_stack_->Begin(), *end = mark_stack_->End(); it < end; ) { 123794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier const size_t delta = std::min(static_cast<size_t>(end - it), chunk_size); 12380e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier thread_pool->AddTask(self, new MarkStackTask<false>(thread_pool, this, delta, it)); 123994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier it += delta; 124002b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier } 12412775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier thread_pool->SetMaxActiveWorkers(thread_count - 1); 124202b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier thread_pool->StartWorkers(self); 12432775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier thread_pool->Wait(self, true, true); 124494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier thread_pool->StopWorkers(self); 124502b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier mark_stack_->Reset(); 12463e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers CHECK_EQ(work_chunks_created_.LoadSequentiallyConsistent(), 12473e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers work_chunks_deleted_.LoadSequentiallyConsistent()) 12483e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers << " some of the work chunks were leaked"; 124969759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro} 125069759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro 12515d76c435082332ef79a22962386fa92a0870e378Ian Rogers// Scan anything that's on the mark stack. 125294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartiervoid MarkSweep::ProcessMarkStack(bool paused) { 1253f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(paused ? "(Paused)ProcessMarkStack" : __FUNCTION__, GetTimings()); 12542775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier size_t thread_count = GetThreadCount(paused); 12552775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier if (kParallelProcessMarkStack && thread_count > 1 && 12562775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier mark_stack_->Size() >= kMinimumParallelMarkStackSize) { 12572775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier ProcessMarkStackParallel(thread_count); 125894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } else { 125994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // TODO: Tune this. 126094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier static const size_t kFifoSize = 4; 1261590fee9e8972f872301c2d16a575d579ee564beeMathieu Chartier BoundedFifoPowerOfTwo<Object*, kFifoSize> prefetch_fifo; 1262d8195f19840911a73b1491dfc8e7c18139753731Mathieu Chartier for (;;) { 12632cebb24bfc3247d3e9be138a3350106737455918Mathieu Chartier Object* obj = nullptr; 126494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier if (kUseMarkStackPrefetch) { 126594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier while (!mark_stack_->IsEmpty() && prefetch_fifo.size() < kFifoSize) { 1266277ccbd200ea43590dfc06a93ae184a765327ad0Andreas Gampe Object* mark_stack_obj = mark_stack_->PopBack(); 12672cebb24bfc3247d3e9be138a3350106737455918Mathieu Chartier DCHECK(mark_stack_obj != nullptr); 1268277ccbd200ea43590dfc06a93ae184a765327ad0Andreas Gampe __builtin_prefetch(mark_stack_obj); 1269277ccbd200ea43590dfc06a93ae184a765327ad0Andreas Gampe prefetch_fifo.push_back(mark_stack_obj); 127094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 127194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier if (prefetch_fifo.empty()) { 127294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier break; 127394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 127494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier obj = prefetch_fifo.front(); 127594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier prefetch_fifo.pop_front(); 127694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } else { 127794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier if (mark_stack_->IsEmpty()) { 127894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier break; 127994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 128094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier obj = mark_stack_->PopBack(); 1281d8195f19840911a73b1491dfc8e7c18139753731Mathieu Chartier } 12824aeec176eaf11fe03f342aadcbb79142230270edMathieu Chartier DCHECK(obj != nullptr); 1283d8195f19840911a73b1491dfc8e7c18139753731Mathieu Chartier ScanObject(obj); 1284357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier } 1285357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier } 128669759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro} 128769759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro 128852e4b43d62896b56f8c2bd041e528472bb4a0d8dMathieu Chartierinline bool MarkSweep::IsMarked(const Object* object) const { 12898d562103c3a3452fb15ef4b1c64df767b70507a4Mathieu Chartier if (immune_region_.ContainsObject(object)) { 12907469ebf3888b8037421cb6834f37f946646265ecMathieu Chartier return true; 12917469ebf3888b8037421cb6834f37f946646265ecMathieu Chartier } 12920e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier if (current_space_bitmap_->HasAddress(object)) { 12930e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier return current_space_bitmap_->Test(object); 12947469ebf3888b8037421cb6834f37f946646265ecMathieu Chartier } 12950e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier return mark_bitmap_->Test(object); 12967469ebf3888b8037421cb6834f37f946646265ecMathieu Chartier} 12977469ebf3888b8037421cb6834f37f946646265ecMathieu Chartier 12982b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartiervoid MarkSweep::FinishPhase() { 1299f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 1300d22d54849c96760aa1efa259d6dcfbace54da2afMathieu Chartier if (kCountScannedTypes) { 13013e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers VLOG(gc) << "MarkSweep scanned classes=" << class_count_.LoadRelaxed() 13023e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers << " arrays=" << array_count_.LoadRelaxed() << " other=" << other_count_.LoadRelaxed(); 130302b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier } 130402b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier if (kCountTasks) { 13053e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers VLOG(gc) << "Total number of work chunks allocated: " << work_chunks_created_.LoadRelaxed(); 130602b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier } 130702b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier if (kMeasureOverhead) { 13083e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers VLOG(gc) << "Overhead time " << PrettyDuration(overhead_time_.LoadRelaxed()); 130902b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier } 131002b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier if (kProfileLargeObjects) { 13113e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers VLOG(gc) << "Large objects tested " << large_object_test_.LoadRelaxed() 13123e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers << " marked " << large_object_mark_.LoadRelaxed(); 131302b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier } 1314d22d54849c96760aa1efa259d6dcfbace54da2afMathieu Chartier if (kCountJavaLangRefs) { 13153e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers VLOG(gc) << "References scanned " << reference_count_.LoadRelaxed(); 131602b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier } 13170e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier if (kCountMarkedObjects) { 13183e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers VLOG(gc) << "Marked: null=" << mark_null_count_.LoadRelaxed() 13193e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers << " immune=" << mark_immune_count_.LoadRelaxed() 13203e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers << " fastpath=" << mark_fastpath_count_.LoadRelaxed() 13213e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers << " slowpath=" << mark_slowpath_count_.LoadRelaxed(); 13220e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier } 13234aeec176eaf11fe03f342aadcbb79142230270edMathieu Chartier CHECK(mark_stack_->IsEmpty()); // Ensure that the mark stack is empty. 13245301cd241b4d8afbfc1211e107c41f1b15c6bd48Mathieu Chartier mark_stack_->Reset(); 13254aeec176eaf11fe03f342aadcbb79142230270edMathieu Chartier WriterMutexLock mu(Thread::Current(), *Locks::heap_bitmap_lock_); 13264aeec176eaf11fe03f342aadcbb79142230270edMathieu Chartier heap_->ClearMarkedObjects(); 132769759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro} 132869759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro 1329c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchivoid MarkSweep::RevokeAllThreadLocalBuffers() { 1330c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchi if (kRevokeRosAllocThreadLocalBuffersAtCheckpoint && IsConcurrent()) { 1331c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchi // If concurrent, rosalloc thread-local buffers are revoked at the 1332c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchi // thread checkpoint. Bump pointer space thread-local buffers must 1333c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchi // not be in use. 1334c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchi GetHeap()->AssertAllBumpPointerSpaceThreadLocalBuffersAreRevoked(); 1335c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchi } else { 1336f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 1337c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchi GetHeap()->RevokeAllThreadLocalBuffers(); 1338c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchi } 1339c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchi} 1340c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchi 13411d54e73444e017d3a65234e0f193846f3e27472bIan Rogers} // namespace collector 13421d54e73444e017d3a65234e0f193846f3e27472bIan Rogers} // namespace gc 134369759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro} // namespace art 1344