mark_sweep.cc revision 10d6886c9ce3ed87431cf10d376a69c23950fa61
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 192b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier#include <functional> 202b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier#include <numeric> 2158551df3c2646ed507feec9e9eb3768085a76059Carl Shapiro#include <climits> 2258551df3c2646ed507feec9e9eb3768085a76059Carl Shapiro#include <vector> 2358551df3c2646ed507feec9e9eb3768085a76059Carl Shapiro 24cf7f19135f0e273f7b0136315633c2abfc715343Ian Rogers#define ATRACE_TAG ATRACE_TAG_DALVIK 25cf7f19135f0e273f7b0136315633c2abfc715343Ian Rogers#include "cutils/trace.h" 26cf7f19135f0e273f7b0136315633c2abfc715343Ian Rogers 2794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier#include "base/bounded_fifo.h" 2807ed66b5ae659c452cbe1ab20c3dbf1d6f546461Elliott Hughes#include "base/logging.h" 29761600567d73b23324ae0251e871c15d6849ffd8Elliott Hughes#include "base/macros.h" 30693ff61274cd2c9b8eb7e68c370f84a911b8ca52Ian Rogers#include "base/mutex-inl.h" 31a84395489098e4531619b1cffd1afc282b14510eSameer Abu Asal#include "base/timing_logger.h" 321d54e73444e017d3a65234e0f193846f3e27472bIan Rogers#include "gc/accounting/card_table-inl.h" 334aeec176eaf11fe03f342aadcbb79142230270edMathieu Chartier#include "gc/accounting/heap_bitmap-inl.h" 3411409ae81a3eaf84d7fd2b3c85b8b06d2bae27f0Mathieu Chartier#include "gc/accounting/mod_union_table.h" 351d54e73444e017d3a65234e0f193846f3e27472bIan Rogers#include "gc/accounting/space_bitmap-inl.h" 361d54e73444e017d3a65234e0f193846f3e27472bIan Rogers#include "gc/heap.h" 3778f7b4c04ab6e8b5581921bc95b67a9beee1c246Mathieu Chartier#include "gc/reference_processor.h" 381d54e73444e017d3a65234e0f193846f3e27472bIan Rogers#include "gc/space/image_space.h" 391d54e73444e017d3a65234e0f193846f3e27472bIan Rogers#include "gc/space/large_object_space.h" 401d54e73444e017d3a65234e0f193846f3e27472bIan Rogers#include "gc/space/space-inl.h" 412dd0e2cea360bc9206eb88ecc40d259e796c239dIan Rogers#include "mark_sweep-inl.h" 422dd0e2cea360bc9206eb88ecc40d259e796c239dIan Rogers#include "mirror/object-inl.h" 431f87008b165d26541d832ff805250afdc89c253dBrian Carlstrom#include "runtime.h" 444aeec176eaf11fe03f342aadcbb79142230270edMathieu Chartier#include "scoped_thread_state_change.h" 451d54e73444e017d3a65234e0f193846f3e27472bIan Rogers#include "thread-inl.h" 466f1c94968ada57da433debf8e2d1b38a80ceb510Mathieu Chartier#include "thread_list.h" 4769759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro 483e3d591f781b771de89f3b989830da2b6ac6fac8Brian Carlstromusing ::art::mirror::Object; 492dd0e2cea360bc9206eb88ecc40d259e796c239dIan Rogers 5069759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapironamespace art { 511d54e73444e017d3a65234e0f193846f3e27472bIan Rogersnamespace gc { 521d54e73444e017d3a65234e0f193846f3e27472bIan Rogersnamespace collector { 5369759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro 5402b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier// Performance options. 55eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartierstatic constexpr bool kUseRecursiveMark = false; 56eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartierstatic constexpr bool kUseMarkStackPrefetch = true; 57eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartierstatic constexpr size_t kSweepArrayChunkFreeSize = 1024; 58eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartierstatic constexpr bool kPreCleanCards = true; 5994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 6094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier// Parallelism options. 61eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartierstatic constexpr bool kParallelCardScan = true; 62eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartierstatic constexpr bool kParallelRecursiveMark = true; 6394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier// Don't attempt to parallelize mark stack processing unless the mark stack is at least n 6494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier// elements. This is temporary until we reduce the overhead caused by allocating tasks, etc.. Not 6594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier// having this can add overhead in ProcessReferences since we may end up doing many calls of 6694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier// ProcessMarkStack with very small mark stacks. 67eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartierstatic constexpr size_t kMinimumParallelMarkStackSize = 128; 68eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartierstatic constexpr bool kParallelProcessMarkStack = true; 69858f1c5fd5e528d0b16040ced74d4636046a42d8Mathieu Chartier 7002b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier// Profiling and information flags. 71eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartierstatic constexpr bool kProfileLargeObjects = false; 72eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartierstatic constexpr bool kMeasureOverhead = false; 73eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartierstatic constexpr bool kCountTasks = false; 74eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartierstatic constexpr bool kCountJavaLangRefs = false; 750e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartierstatic constexpr bool kCountMarkedObjects = false; 7694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 7794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier// Turn off kCheckLocks when profiling the GC since it slows the GC down by up to 40%. 78eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartierstatic constexpr bool kCheckLocks = kDebugLocking; 797bf9f190cd33a7e2f8584299eb889e9df66e0323Mathieu Chartierstatic constexpr bool kVerifyRootsMarked = kIsDebugBuild; 8002b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier 81c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchi// If true, revoke the rosalloc thread-local buffers at the 82c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchi// checkpoint, as opposed to during the pause. 83c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchistatic constexpr bool kRevokeRosAllocThreadLocalBuffersAtCheckpoint = true; 84c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchi 852b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartiervoid MarkSweep::BindBitmaps() { 86f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 872b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier WriterMutexLock mu(Thread::Current(), *Locks::heap_bitmap_lock_); 882b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier // Mark all of the spaces we never collect as immune. 8994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier for (const auto& space : GetHeap()->GetContinuousSpaces()) { 901d54e73444e017d3a65234e0f193846f3e27472bIan Rogers if (space->GetGcRetentionPolicy() == space::kGcRetentionPolicyNeverCollect) { 918d562103c3a3452fb15ef4b1c64df767b70507a4Mathieu Chartier CHECK(immune_region_.AddContinuousSpace(space)) << "Failed to add space " << *space; 922b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier } 932b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier } 942b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier} 952b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier 961d54e73444e017d3a65234e0f193846f3e27472bIan RogersMarkSweep::MarkSweep(Heap* heap, bool is_concurrent, const std::string& name_prefix) 971d54e73444e017d3a65234e0f193846f3e27472bIan Rogers : GarbageCollector(heap, 98590fee9e8972f872301c2d16a575d579ee564beeMathieu Chartier name_prefix + 991d54e73444e017d3a65234e0f193846f3e27472bIan Rogers (is_concurrent ? "concurrent mark sweep": "mark sweep")), 1003e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers current_space_bitmap_(nullptr), mark_bitmap_(nullptr), mark_stack_(nullptr), 10135883cc623fdf475a4ead1dafcba9e9becc1ed11Mathieu Chartier gc_barrier_(new Barrier(0)), 102958291c7afe723d846a39539fd00410c102485f3Mathieu Chartier mark_stack_lock_("mark sweep mark stack lock", kMarkSweepMarkStackLock), 1033e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers is_concurrent_(is_concurrent), live_stack_freeze_size_(0) { 104bbdc5bc5fd5141711879a6c85d80ac45b7aad5d0Hiroshi Yamauchi std::string error_msg; 105bbdc5bc5fd5141711879a6c85d80ac45b7aad5d0Hiroshi Yamauchi MemMap* mem_map = MemMap::MapAnonymous( 106bbdc5bc5fd5141711879a6c85d80ac45b7aad5d0Hiroshi Yamauchi "mark sweep sweep array free buffer", nullptr, 107bbdc5bc5fd5141711879a6c85d80ac45b7aad5d0Hiroshi Yamauchi RoundUp(kSweepArrayChunkFreeSize * sizeof(mirror::Object*), kPageSize), 1085c42c29b89286e5efa4a4613132b09051ce5945bVladimir Marko PROT_READ | PROT_WRITE, false, false, &error_msg); 109bbdc5bc5fd5141711879a6c85d80ac45b7aad5d0Hiroshi Yamauchi CHECK(mem_map != nullptr) << "Couldn't allocate sweep array free buffer: " << error_msg; 110bbdc5bc5fd5141711879a6c85d80ac45b7aad5d0Hiroshi Yamauchi sweep_array_free_buffer_mem_map_.reset(mem_map); 1115301cd241b4d8afbfc1211e107c41f1b15c6bd48Mathieu Chartier} 112b3bd5f07884f5a1f2b84224363b1372d7c28d447Elliott Hughes 1132b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartiervoid MarkSweep::InitializePhase() { 114f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 115eb8167a4f4d27fce0530f6724ab8032610cd146bMathieu Chartier mark_stack_ = heap_->GetMarkStack(); 116e53225c7b8c98f8fc3855fc70f718e7f8abab307Mathieu Chartier DCHECK(mark_stack_ != nullptr); 1178d562103c3a3452fb15ef4b1c64df767b70507a4Mathieu Chartier immune_region_.Reset(); 1183e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers class_count_.StoreRelaxed(0); 1193e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers array_count_.StoreRelaxed(0); 1203e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers other_count_.StoreRelaxed(0); 1213e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers large_object_test_.StoreRelaxed(0); 1223e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers large_object_mark_.StoreRelaxed(0); 1233e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers overhead_time_ .StoreRelaxed(0); 1243e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers work_chunks_created_.StoreRelaxed(0); 1253e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers work_chunks_deleted_.StoreRelaxed(0); 1263e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers reference_count_.StoreRelaxed(0); 1273e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers mark_null_count_.StoreRelaxed(0); 1283e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers mark_immune_count_.StoreRelaxed(0); 1293e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers mark_fastpath_count_.StoreRelaxed(0); 1303e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers mark_slowpath_count_.StoreRelaxed(0); 1310e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier { 132eb8167a4f4d27fce0530f6724ab8032610cd146bMathieu Chartier // TODO: I don't think we should need heap bitmap lock to Get the mark bitmap. 1330e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier ReaderMutexLock mu(Thread::Current(), *Locks::heap_bitmap_lock_); 1340e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier mark_bitmap_ = heap_->GetMarkBitmap(); 1350e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier } 13610fb83ad7442c8cf3356a89ec918e0786f110981Mathieu Chartier if (!GetCurrentIteration()->GetClearSoftReferences()) { 137df386c551405ce9668e827584f744c6f098761faHiroshi Yamauchi // Always clear soft references if a non-sticky collection. 13810fb83ad7442c8cf3356a89ec918e0786f110981Mathieu Chartier GetCurrentIteration()->SetClearSoftReferences(GetGcType() != collector::kGcTypeSticky); 139df386c551405ce9668e827584f744c6f098761faHiroshi Yamauchi } 1406f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier} 1416f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier 1426f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartiervoid MarkSweep::RunPhases() { 1436f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier Thread* self = Thread::Current(); 1446f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier InitializePhase(); 1456f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier Locks::mutator_lock_->AssertNotHeld(self); 1466f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier if (IsConcurrent()) { 1476f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier GetHeap()->PreGcVerification(this); 1486f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier { 1496f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier ReaderMutexLock mu(self, *Locks::mutator_lock_); 1506f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier MarkingPhase(); 1516f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier } 1526f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier ScopedPause pause(this); 1536f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier GetHeap()->PrePauseRosAllocVerification(this); 1546f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier PausePhase(); 1556f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier RevokeAllThreadLocalBuffers(); 1566f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier } else { 1576f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier ScopedPause pause(this); 1586f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier GetHeap()->PreGcVerificationPaused(this); 1596f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier MarkingPhase(); 1606f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier GetHeap()->PrePauseRosAllocVerification(this); 1616f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier PausePhase(); 1626f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier RevokeAllThreadLocalBuffers(); 1636f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier } 1646f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier { 1656f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier // Sweeping always done concurrently, even for non concurrent mark sweep. 1666f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier ReaderMutexLock mu(self, *Locks::mutator_lock_); 1676f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier ReclaimPhase(); 1686f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier } 1696f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier GetHeap()->PostGcVerification(this); 1706f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier FinishPhase(); 1712b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier} 1722b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier 1732b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartiervoid MarkSweep::ProcessReferences(Thread* self) { 1748e56c7e41cb37e2eaf553503968a01ff893b135bMathieu Chartier WriterMutexLock mu(self, *Locks::heap_bitmap_lock_); 17578f7b4c04ab6e8b5581921bc95b67a9beee1c246Mathieu Chartier GetHeap()->GetReferenceProcessor()->ProcessReferences( 17610fb83ad7442c8cf3356a89ec918e0786f110981Mathieu Chartier true, GetTimings(), GetCurrentIteration()->GetClearSoftReferences(), 17710fb83ad7442c8cf3356a89ec918e0786f110981Mathieu Chartier &HeapReferenceMarkedCallback, &MarkObjectCallback, &ProcessMarkStackCallback, this); 1781ad2784ad9f311ebf9fe0677d33818648f423f9cMathieu Chartier} 1791ad2784ad9f311ebf9fe0677d33818648f423f9cMathieu Chartier 1800f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartiervoid MarkSweep::PausePhase() { 181f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t("(Paused)PausePhase", GetTimings()); 1822b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier Thread* self = Thread::Current(); 1832b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier Locks::mutator_lock_->AssertExclusiveHeld(self); 1840f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier if (IsConcurrent()) { 1850f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier // Handle the dirty objects if we are a concurrent GC. 1862b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier WriterMutexLock mu(self, *Locks::heap_bitmap_lock_); 1872b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier // Re-mark root set. 1882b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier ReMarkRoots(); 1892b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier // Scan dirty objects, this is only required if we are not doing concurrent GC. 19094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier RecursiveMarkDirtyObjects(true, accounting::CardTable::kCardDirty); 1912b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier } 1920f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier { 193f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t2("SwapStacks", GetTimings()); 1942b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier WriterMutexLock mu(self, *Locks::heap_bitmap_lock_); 1950f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier heap_->SwapStacks(self); 1960f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier live_stack_freeze_size_ = heap_->GetLiveStack()->Size(); 1970f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier // Need to revoke all the thread local allocation stacks since we just swapped the allocation 1980f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier // stacks and don't want anybody to allocate into the live stack. 199c22c59ef8513b4cbbfd25073d1afbf58196b522aMathieu Chartier RevokeAllThreadLocalAllocationStacks(self); 2002b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier } 2010f72e4136aecaf6976fdb55916bbd7b6d5c9c77bMathieu Chartier heap_->PreSweepingGcVerification(this); 2026f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier // Disallow new system weaks to prevent a race which occurs when someone adds a new system 2036f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier // weak before we sweep them. Since this new system weak may not be marked, the GC may 2046f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier // incorrectly sweep it. This also fixes a race where interning may attempt to return a strong 2056f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier // reference to a string that is about to be swept. 2066f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier Runtime::Current()->DisallowNewSystemWeaks(); 20778f7b4c04ab6e8b5581921bc95b67a9beee1c246Mathieu Chartier // Enable the reference processing slow path, needs to be done with mutators paused since there 20878f7b4c04ab6e8b5581921bc95b67a9beee1c246Mathieu Chartier // is no lock in the GetReferent fast path. 20978f7b4c04ab6e8b5581921bc95b67a9beee1c246Mathieu Chartier GetHeap()->GetReferenceProcessor()->EnableSlowPath(); 2102b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier} 2112b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier 212dda54f59271464b5a72bf4cde6d9010e8dc1f337Mathieu Chartiervoid MarkSweep::PreCleanCards() { 213dda54f59271464b5a72bf4cde6d9010e8dc1f337Mathieu Chartier // Don't do this for non concurrent GCs since they don't have any dirty cards. 214dda54f59271464b5a72bf4cde6d9010e8dc1f337Mathieu Chartier if (kPreCleanCards && IsConcurrent()) { 215f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 216dda54f59271464b5a72bf4cde6d9010e8dc1f337Mathieu Chartier Thread* self = Thread::Current(); 217dda54f59271464b5a72bf4cde6d9010e8dc1f337Mathieu Chartier CHECK(!Locks::mutator_lock_->IsExclusiveHeld(self)); 218dda54f59271464b5a72bf4cde6d9010e8dc1f337Mathieu Chartier // Process dirty cards and add dirty cards to mod union tables, also ages cards. 2194add3b4fa38ec42bb3c71d01cf70bce8e9a9fb4eLei Li heap_->ProcessCards(GetTimings(), false, true, false); 220eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartier // The checkpoint root marking is required to avoid a race condition which occurs if the 221eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartier // following happens during a reference write: 222eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartier // 1. mutator dirties the card (write barrier) 223eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartier // 2. GC ages the card (the above ProcessCards call) 224eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartier // 3. GC scans the object (the RecursiveMarkDirtyObjects call below) 225eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartier // 4. mutator writes the value (corresponding to the write barrier in 1.) 226eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartier // This causes the GC to age the card but not necessarily mark the reference which the mutator 227eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartier // wrote into the object stored in the card. 228eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartier // Having the checkpoint fixes this issue since it ensures that the card mark and the 229eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartier // reference write are visible to the GC before the card is scanned (this is due to locks being 230eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartier // acquired / released in the checkpoint code). 231eb7bbad163ce7a2c60bba6e0d3d7488e5cfb2c05Mathieu Chartier // The other roots are also marked to help reduce the pause. 2320f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier MarkRootsCheckpoint(self, false); 233dda54f59271464b5a72bf4cde6d9010e8dc1f337Mathieu Chartier MarkNonThreadRoots(); 234893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartier MarkConcurrentRoots( 235893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartier static_cast<VisitRootFlags>(kVisitRootFlagClearRootLog | kVisitRootFlagNewRoots)); 236dda54f59271464b5a72bf4cde6d9010e8dc1f337Mathieu Chartier // Process the newly aged cards. 237dda54f59271464b5a72bf4cde6d9010e8dc1f337Mathieu Chartier RecursiveMarkDirtyObjects(false, accounting::CardTable::kCardDirty - 1); 238dda54f59271464b5a72bf4cde6d9010e8dc1f337Mathieu Chartier // TODO: Empty allocation stack to reduce the number of objects we need to test / mark as live 239dda54f59271464b5a72bf4cde6d9010e8dc1f337Mathieu Chartier // in the next GC. 240dda54f59271464b5a72bf4cde6d9010e8dc1f337Mathieu Chartier } 241dda54f59271464b5a72bf4cde6d9010e8dc1f337Mathieu Chartier} 242dda54f59271464b5a72bf4cde6d9010e8dc1f337Mathieu Chartier 243c22c59ef8513b4cbbfd25073d1afbf58196b522aMathieu Chartiervoid MarkSweep::RevokeAllThreadLocalAllocationStacks(Thread* self) { 244c22c59ef8513b4cbbfd25073d1afbf58196b522aMathieu Chartier if (kUseThreadLocalAllocationStack) { 245f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 246c22c59ef8513b4cbbfd25073d1afbf58196b522aMathieu Chartier Locks::mutator_lock_->AssertExclusiveHeld(self); 247c22c59ef8513b4cbbfd25073d1afbf58196b522aMathieu Chartier heap_->RevokeAllThreadLocalAllocationStacks(self); 248c22c59ef8513b4cbbfd25073d1afbf58196b522aMathieu Chartier } 249c22c59ef8513b4cbbfd25073d1afbf58196b522aMathieu Chartier} 250c22c59ef8513b4cbbfd25073d1afbf58196b522aMathieu Chartier 2512b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartiervoid MarkSweep::MarkingPhase() { 252f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 2532b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier Thread* self = Thread::Current(); 2542b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier BindBitmaps(); 2550e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier FindDefaultSpaceBitmap(); 2562b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier // Process dirty cards and add dirty cards to mod union tables. 2574add3b4fa38ec42bb3c71d01cf70bce8e9a9fb4eLei Li // If the GC type is non sticky, then we just clear the cards instead of ageing them. 2584add3b4fa38ec42bb3c71d01cf70bce8e9a9fb4eLei Li heap_->ProcessCards(GetTimings(), false, true, GetGcType() != kGcTypeSticky); 2592b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier WriterMutexLock mu(self, *Locks::heap_bitmap_lock_); 260893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartier MarkRoots(self); 2612b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier MarkReachableObjects(); 262dda54f59271464b5a72bf4cde6d9010e8dc1f337Mathieu Chartier // Pre-clean dirtied cards to reduce pauses. 263dda54f59271464b5a72bf4cde6d9010e8dc1f337Mathieu Chartier PreCleanCards(); 2642b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier} 2652b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier 26611409ae81a3eaf84d7fd2b3c85b8b06d2bae27f0Mathieu Chartiervoid MarkSweep::UpdateAndMarkModUnion() { 26711409ae81a3eaf84d7fd2b3c85b8b06d2bae27f0Mathieu Chartier for (const auto& space : heap_->GetContinuousSpaces()) { 2688d562103c3a3452fb15ef4b1c64df767b70507a4Mathieu Chartier if (immune_region_.ContainsSpace(space)) { 26911409ae81a3eaf84d7fd2b3c85b8b06d2bae27f0Mathieu Chartier const char* name = space->IsZygoteSpace() ? "UpdateAndMarkZygoteModUnionTable" : 27011409ae81a3eaf84d7fd2b3c85b8b06d2bae27f0Mathieu Chartier "UpdateAndMarkImageModUnionTable"; 271f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(name, GetTimings()); 27211409ae81a3eaf84d7fd2b3c85b8b06d2bae27f0Mathieu Chartier accounting::ModUnionTable* mod_union_table = heap_->FindModUnionTableFromSpace(space); 27311409ae81a3eaf84d7fd2b3c85b8b06d2bae27f0Mathieu Chartier CHECK(mod_union_table != nullptr); 274407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier mod_union_table->UpdateAndMarkReferences(MarkHeapReferenceCallback, this); 27511409ae81a3eaf84d7fd2b3c85b8b06d2bae27f0Mathieu Chartier } 27611409ae81a3eaf84d7fd2b3c85b8b06d2bae27f0Mathieu Chartier } 27711409ae81a3eaf84d7fd2b3c85b8b06d2bae27f0Mathieu Chartier} 27811409ae81a3eaf84d7fd2b3c85b8b06d2bae27f0Mathieu Chartier 2792b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartiervoid MarkSweep::MarkReachableObjects() { 2804aeec176eaf11fe03f342aadcbb79142230270edMathieu Chartier UpdateAndMarkModUnion(); 2812b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier // Recursively mark all the non-image bits set in the mark bitmap. 2822b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier RecursiveMark(); 2832b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier} 2842b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier 2852b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartiervoid MarkSweep::ReclaimPhase() { 286f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 287720ef7680573c1afd12f99f02eee3045daee5168Mathieu Chartier Thread* self = Thread::Current(); 28878f7b4c04ab6e8b5581921bc95b67a9beee1c246Mathieu Chartier // Process the references concurrently. 28978f7b4c04ab6e8b5581921bc95b67a9beee1c246Mathieu Chartier ProcessReferences(self); 2900f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier SweepSystemWeaks(self); 2916f365cc033654a5a3b45eaa1379d4b5f156b0ceeMathieu Chartier Runtime::Current()->AllowNewSystemWeaks(); 2922b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier { 2932b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier WriterMutexLock mu(self, *Locks::heap_bitmap_lock_); 2944460a84be92b5a94ecfb5c650aef4945ab849c93Hiroshi Yamauchi GetHeap()->RecordFreeRevoke(); 2952b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier // Reclaim unmarked objects. 2961d54e73444e017d3a65234e0f193846f3e27472bIan Rogers Sweep(false); 2972b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier // Swap the live and mark bitmaps for each space which we modified space. This is an 2982b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier // optimization that enables us to not clear live bits inside of the sweep. Only swaps unbound 2992b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier // bitmaps. 3002b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier SwapBitmaps(); 3012b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier // Unbind the live and mark bitmaps. 302a1602f28c0e3127ad511712d4b08db89737ae901Mathieu Chartier GetHeap()->UnBindBitmaps(); 3032b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier } 3042b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier} 3052b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier 3060e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartiervoid MarkSweep::FindDefaultSpaceBitmap() { 307f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 30802e25119b15a6f619f17db99f5d05124a5807ff3Mathieu Chartier for (const auto& space : GetHeap()->GetContinuousSpaces()) { 309a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartier accounting::ContinuousSpaceBitmap* bitmap = space->GetMarkBitmap(); 310bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier // We want to have the main space instead of non moving if possible. 311590fee9e8972f872301c2d16a575d579ee564beeMathieu Chartier if (bitmap != nullptr && 312590fee9e8972f872301c2d16a575d579ee564beeMathieu Chartier space->GetGcRetentionPolicy() == space::kGcRetentionPolicyAlwaysCollect) { 3130e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier current_space_bitmap_ = bitmap; 314bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier // If we are not the non moving space exit the loop early since this will be good enough. 315bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier if (space != heap_->GetNonMovingSpace()) { 316bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier break; 317bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier } 318b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier } 319b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier } 3204c13a3ff475f206c4d0a86ee2595c45392fd942fMathieu Chartier CHECK(current_space_bitmap_ != nullptr) << "Could not find a default mark bitmap\n" 3214c13a3ff475f206c4d0a86ee2595c45392fd942fMathieu Chartier << heap_->DumpSpaces(); 32258551df3c2646ed507feec9e9eb3768085a76059Carl Shapiro} 32358551df3c2646ed507feec9e9eb3768085a76059Carl Shapiro 324ac86a7cad60c20a131011338057887bb64cbfd38Mathieu Chartiervoid MarkSweep::ExpandMarkStack() { 325ba311b4385fa3f382f01312a8cc97b52011232e3Mathieu Chartier ResizeMarkStack(mark_stack_->Capacity() * 2); 326ba311b4385fa3f382f01312a8cc97b52011232e3Mathieu Chartier} 327ba311b4385fa3f382f01312a8cc97b52011232e3Mathieu Chartier 328ba311b4385fa3f382f01312a8cc97b52011232e3Mathieu Chartiervoid MarkSweep::ResizeMarkStack(size_t new_size) { 329ac86a7cad60c20a131011338057887bb64cbfd38Mathieu Chartier // Rare case, no need to have Thread::Current be a parameter. 330ac86a7cad60c20a131011338057887bb64cbfd38Mathieu Chartier if (UNLIKELY(mark_stack_->Size() < mark_stack_->Capacity())) { 331ac86a7cad60c20a131011338057887bb64cbfd38Mathieu Chartier // Someone else acquired the lock and expanded the mark stack before us. 332ac86a7cad60c20a131011338057887bb64cbfd38Mathieu Chartier return; 333ac86a7cad60c20a131011338057887bb64cbfd38Mathieu Chartier } 334cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier std::vector<StackReference<Object>> temp(mark_stack_->Begin(), mark_stack_->End()); 335ba311b4385fa3f382f01312a8cc97b52011232e3Mathieu Chartier CHECK_LE(mark_stack_->Size(), new_size); 336ba311b4385fa3f382f01312a8cc97b52011232e3Mathieu Chartier mark_stack_->Resize(new_size); 337cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier for (auto& obj : temp) { 338cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier mark_stack_->PushBack(obj.AsMirrorPtr()); 339ac86a7cad60c20a131011338057887bb64cbfd38Mathieu Chartier } 340ac86a7cad60c20a131011338057887bb64cbfd38Mathieu Chartier} 341ac86a7cad60c20a131011338057887bb64cbfd38Mathieu Chartier 3420e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartierinline void MarkSweep::MarkObjectNonNullParallel(Object* obj) { 343bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier DCHECK(obj != nullptr); 344ac86a7cad60c20a131011338057887bb64cbfd38Mathieu Chartier if (MarkObjectParallel(obj)) { 345ba311b4385fa3f382f01312a8cc97b52011232e3Mathieu Chartier MutexLock mu(Thread::Current(), mark_stack_lock_); 346ba311b4385fa3f382f01312a8cc97b52011232e3Mathieu Chartier if (UNLIKELY(mark_stack_->Size() >= mark_stack_->Capacity())) { 347184e322fe8ddd75c844a1eb2eb1ca32bc02f2d45Mathieu Chartier ExpandMarkStack(); 348ac86a7cad60c20a131011338057887bb64cbfd38Mathieu Chartier } 349ba311b4385fa3f382f01312a8cc97b52011232e3Mathieu Chartier // The object must be pushed on to the mark stack. 3500e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier mark_stack_->PushBack(obj); 351ac86a7cad60c20a131011338057887bb64cbfd38Mathieu Chartier } 352ac86a7cad60c20a131011338057887bb64cbfd38Mathieu Chartier} 353ac86a7cad60c20a131011338057887bb64cbfd38Mathieu Chartier 3543bb57c7b41bf5419fe895e7aa664d8d430205ba8Mathieu Chartiermirror::Object* MarkSweep::MarkObjectCallback(mirror::Object* obj, void* arg) { 35539e3261168e7761fea6d873494d7c5d191285791Mathieu Chartier MarkSweep* mark_sweep = reinterpret_cast<MarkSweep*>(arg); 35639e3261168e7761fea6d873494d7c5d191285791Mathieu Chartier mark_sweep->MarkObject(obj); 35739e3261168e7761fea6d873494d7c5d191285791Mathieu Chartier return obj; 35839e3261168e7761fea6d873494d7c5d191285791Mathieu Chartier} 35939e3261168e7761fea6d873494d7c5d191285791Mathieu Chartier 360407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartiervoid MarkSweep::MarkHeapReferenceCallback(mirror::HeapReference<mirror::Object>* ref, void* arg) { 361407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier reinterpret_cast<MarkSweep*>(arg)->MarkObject(ref->AsMirrorPtr()); 362407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier} 363407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier 364308351ada0008b0cbe1a5afc31c302c975554ee4Mathieu Chartierbool MarkSweep::HeapReferenceMarkedCallback(mirror::HeapReference<mirror::Object>* ref, void* arg) { 365308351ada0008b0cbe1a5afc31c302c975554ee4Mathieu Chartier return reinterpret_cast<MarkSweep*>(arg)->IsMarked(ref->AsMirrorPtr()); 366308351ada0008b0cbe1a5afc31c302c975554ee4Mathieu Chartier} 367308351ada0008b0cbe1a5afc31c302c975554ee4Mathieu Chartier 368bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartierclass MarkSweepMarkObjectSlowPath { 369bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier public: 370bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier explicit MarkSweepMarkObjectSlowPath(MarkSweep* mark_sweep) : mark_sweep_(mark_sweep) { 371bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier } 372bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier 373bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier void operator()(const Object* obj) const ALWAYS_INLINE { 374bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier if (kProfileLargeObjects) { 375bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier // TODO: Differentiate between marking and testing somehow. 376bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier ++mark_sweep_->large_object_test_; 377bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier ++mark_sweep_->large_object_mark_; 378bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier } 379bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier space::LargeObjectSpace* large_object_space = mark_sweep_->GetHeap()->GetLargeObjectsSpace(); 380a17288e3b9dd6751005fed3386251d2d0949be74Mathieu Chartier if (UNLIKELY(obj == nullptr || !IsAligned<kPageSize>(obj) || 3812dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier (kIsDebugBuild && large_object_space != nullptr && 3822dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier !large_object_space->Contains(obj)))) { 383bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier LOG(ERROR) << "Tried to mark " << obj << " not contained by any spaces"; 384bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier LOG(ERROR) << "Attempting see if it's a bad root"; 385bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier mark_sweep_->VerifyRoots(); 386bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier LOG(FATAL) << "Can't mark invalid object"; 387bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier } 388bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier } 389bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier 390bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier private: 391bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier MarkSweep* const mark_sweep_; 392bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier}; 393bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier 3940e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartierinline void MarkSweep::MarkObjectNonNull(Object* obj) { 3950e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier DCHECK(obj != nullptr); 396624468cd401cc1ac0dd70c746301e0788a597759Hiroshi Yamauchi if (kUseBakerOrBrooksReadBarrier) { 397624468cd401cc1ac0dd70c746301e0788a597759Hiroshi Yamauchi // Verify all the objects have the correct pointer installed. 398624468cd401cc1ac0dd70c746301e0788a597759Hiroshi Yamauchi obj->AssertReadBarrierPointer(); 3999d04a20bde1b1855cefc64aebc1a44e253b1a13bHiroshi Yamauchi } 4008d562103c3a3452fb15ef4b1c64df767b70507a4Mathieu Chartier if (immune_region_.ContainsObject(obj)) { 4010e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier if (kCountMarkedObjects) { 4020e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier ++mark_immune_count_; 4030e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier } 404bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier DCHECK(mark_bitmap_->Test(obj)); 405bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier } else if (LIKELY(current_space_bitmap_->HasAddress(obj))) { 406bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier if (kCountMarkedObjects) { 407bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier ++mark_fastpath_count_; 408bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier } 409bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier if (UNLIKELY(!current_space_bitmap_->Set(obj))) { 410bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier PushOnMarkStack(obj); // This object was not previously marked. 411bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier } 412bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier } else { 4130e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier if (kCountMarkedObjects) { 4140e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier ++mark_slowpath_count_; 4150e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier } 416bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier MarkSweepMarkObjectSlowPath visitor(this); 417bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier // TODO: We already know that the object is not in the current_space_bitmap_ but MarkBitmap::Set 418bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier // will check again. 419bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier if (!mark_bitmap_->Set(obj, visitor)) { 420bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier PushOnMarkStack(obj); // Was not already marked, push. 421357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier } 4220e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier } 4230e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier} 4240e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier 4250e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartierinline void MarkSweep::PushOnMarkStack(Object* obj) { 4260e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier if (UNLIKELY(mark_stack_->Size() >= mark_stack_->Capacity())) { 4270e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier // Lock is not needed but is here anyways to please annotalysis. 4280e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier MutexLock mu(Thread::Current(), mark_stack_lock_); 4290e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier ExpandMarkStack(); 43069759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro } 4310e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier // The object must be pushed on to the mark stack. 4320e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier mark_stack_->PushBack(obj); 43369759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro} 43469759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro 43502b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartierinline bool MarkSweep::MarkObjectParallel(const Object* obj) { 4360e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier DCHECK(obj != nullptr); 437624468cd401cc1ac0dd70c746301e0788a597759Hiroshi Yamauchi if (kUseBakerOrBrooksReadBarrier) { 438624468cd401cc1ac0dd70c746301e0788a597759Hiroshi Yamauchi // Verify all the objects have the correct pointer installed. 439624468cd401cc1ac0dd70c746301e0788a597759Hiroshi Yamauchi obj->AssertReadBarrierPointer(); 4409d04a20bde1b1855cefc64aebc1a44e253b1a13bHiroshi Yamauchi } 4418d562103c3a3452fb15ef4b1c64df767b70507a4Mathieu Chartier if (immune_region_.ContainsObject(obj)) { 44202b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier DCHECK(IsMarked(obj)); 44302b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier return false; 44402b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier } 44502b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier // Try to take advantage of locality of references within a space, failing this find the space 44602b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier // the hard way. 447a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartier accounting::ContinuousSpaceBitmap* object_bitmap = current_space_bitmap_; 448bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier if (LIKELY(object_bitmap->HasAddress(obj))) { 449bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier return !object_bitmap->AtomicTestAndSet(obj); 45002b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier } 451bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier MarkSweepMarkObjectSlowPath visitor(this); 452bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier return !mark_bitmap_->AtomicTestAndSet(obj, visitor); 45302b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier} 45402b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier 4550e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier// Used to mark objects when processing the mark stack. If an object is null, it is not marked. 4560e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartierinline void MarkSweep::MarkObject(Object* obj) { 4570e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier if (obj != nullptr) { 4589642c96bd5a1ccc4e221de9c0af4a545af8182d2Mathieu Chartier MarkObjectNonNull(obj); 4590e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier } else if (kCountMarkedObjects) { 4600e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier ++mark_null_count_; 46169759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro } 46269759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro} 46369759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro 464bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartierclass VerifyRootMarkedVisitor : public SingleRootVisitor { 465bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier public: 466bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier explicit VerifyRootMarkedVisitor(MarkSweep* collector) : collector_(collector) { } 467ac86a7cad60c20a131011338057887bb64cbfd38Mathieu Chartier 468bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier void VisitRoot(mirror::Object* root, const RootInfo& info) OVERRIDE 469bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier SHARED_LOCKS_REQUIRED(Locks::mutator_lock_, Locks::heap_bitmap_lock_) { 470bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier CHECK(collector_->IsMarked(root)) << info.ToString(); 471bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier } 472bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier 473bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier private: 474bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier MarkSweep* const collector_; 475bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier}; 476893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartier 477bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartiervoid MarkSweep::VisitRoots(mirror::Object*** roots, size_t count, 478bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier const RootInfo& info ATTRIBUTE_UNUSED) { 479bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier for (size_t i = 0; i < count; ++i) { 480bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier MarkObjectNonNull(*roots[i]); 481bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier } 482815873ecc312b1d231acce71e1a16f42cdaf09f2Mathieu Chartier} 483815873ecc312b1d231acce71e1a16f42cdaf09f2Mathieu Chartier 484bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartiervoid MarkSweep::VisitRoots(mirror::CompressedReference<mirror::Object>** roots, size_t count, 485bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier const RootInfo& info ATTRIBUTE_UNUSED) { 486bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier for (size_t i = 0; i < count; ++i) { 487bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier MarkObjectNonNull(roots[i]->AsMirrorPtr()); 488bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier } 4896f1c94968ada57da433debf8e2d1b38a80ceb510Mathieu Chartier} 4906f1c94968ada57da433debf8e2d1b38a80ceb510Mathieu Chartier 491bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartierclass VerifyRootVisitor : public SingleRootVisitor { 492bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier public: 493bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier void VisitRoot(mirror::Object* root, const RootInfo& info) OVERRIDE 494bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier SHARED_LOCKS_REQUIRED(Locks::mutator_lock_, Locks::heap_bitmap_lock_) { 4959086b65b2ad35dd39a8afc62d535be8217208d08Mathieu Chartier // See if the root is on any space bitmap. 4969086b65b2ad35dd39a8afc62d535be8217208d08Mathieu Chartier auto* heap = Runtime::Current()->GetHeap(); 4979086b65b2ad35dd39a8afc62d535be8217208d08Mathieu Chartier if (heap->GetLiveBitmap()->GetContinuousSpaceBitmap(root) == nullptr) { 4989086b65b2ad35dd39a8afc62d535be8217208d08Mathieu Chartier space::LargeObjectSpace* large_object_space = heap->GetLargeObjectsSpace(); 4999086b65b2ad35dd39a8afc62d535be8217208d08Mathieu Chartier if (large_object_space != nullptr && !large_object_space->Contains(root)) { 5009086b65b2ad35dd39a8afc62d535be8217208d08Mathieu Chartier LOG(ERROR) << "Found invalid root: " << root << " " << info; 5019086b65b2ad35dd39a8afc62d535be8217208d08Mathieu Chartier } 5026f1c94968ada57da433debf8e2d1b38a80ceb510Mathieu Chartier } 5036f1c94968ada57da433debf8e2d1b38a80ceb510Mathieu Chartier } 5049086b65b2ad35dd39a8afc62d535be8217208d08Mathieu Chartier}; 5056f1c94968ada57da433debf8e2d1b38a80ceb510Mathieu Chartier 5066f1c94968ada57da433debf8e2d1b38a80ceb510Mathieu Chartiervoid MarkSweep::VerifyRoots() { 5079086b65b2ad35dd39a8afc62d535be8217208d08Mathieu Chartier VerifyRootVisitor visitor; 508bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier Runtime::Current()->GetThreadList()->VisitRoots(&visitor); 5096f1c94968ada57da433debf8e2d1b38a80ceb510Mathieu Chartier} 5106f1c94968ada57da433debf8e2d1b38a80ceb510Mathieu Chartier 511893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartiervoid MarkSweep::MarkRoots(Thread* self) { 512f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 513893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartier if (Locks::mutator_lock_->IsExclusiveHeld(self)) { 514893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartier // If we exclusively hold the mutator lock, all threads must be suspended. 515bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier Runtime::Current()->VisitRoots(this); 516893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartier RevokeAllThreadLocalAllocationStacks(self); 517893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartier } else { 5180f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier MarkRootsCheckpoint(self, kRevokeRosAllocThreadLocalBuffersAtCheckpoint); 519893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartier // At this point the live stack should no longer have any mutators which push into it. 520893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartier MarkNonThreadRoots(); 521893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartier MarkConcurrentRoots( 522893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartier static_cast<VisitRootFlags>(kVisitRootFlagAllRoots | kVisitRootFlagStartLoggingNewRoots)); 523893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartier } 5249ebae1f30b84dfd8dab4144f80eebec4f8fc8851Mathieu Chartier} 5259ebae1f30b84dfd8dab4144f80eebec4f8fc8851Mathieu Chartier 526858f1c5fd5e528d0b16040ced74d4636046a42d8Mathieu Chartiervoid MarkSweep::MarkNonThreadRoots() { 527f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 528bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier Runtime::Current()->VisitNonThreadRoots(this); 529858f1c5fd5e528d0b16040ced74d4636046a42d8Mathieu Chartier} 530858f1c5fd5e528d0b16040ced74d4636046a42d8Mathieu Chartier 531893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartiervoid MarkSweep::MarkConcurrentRoots(VisitRootFlags flags) { 532f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 5331d54e73444e017d3a65234e0f193846f3e27472bIan Rogers // Visit all runtime roots and clear dirty flags. 534bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier Runtime::Current()->VisitConcurrentRoots(this, flags); 53569759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro} 53669759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro 53702b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartierclass ScanObjectVisitor { 538cc236d74772dda5a4161d9bc5f497fd3d956eb87Mathieu Chartier public: 53994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier explicit ScanObjectVisitor(MarkSweep* const mark_sweep) ALWAYS_INLINE 54094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier : mark_sweep_(mark_sweep) {} 541cc236d74772dda5a4161d9bc5f497fd3d956eb87Mathieu Chartier 542407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier void operator()(Object* obj) const ALWAYS_INLINE SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) 543407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) { 54494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier if (kCheckLocks) { 5452b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier Locks::mutator_lock_->AssertSharedHeld(Thread::Current()); 5462b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier Locks::heap_bitmap_lock_->AssertExclusiveHeld(Thread::Current()); 5472b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier } 54802b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier mark_sweep_->ScanObject(obj); 549cc236d74772dda5a4161d9bc5f497fd3d956eb87Mathieu Chartier } 550cc236d74772dda5a4161d9bc5f497fd3d956eb87Mathieu Chartier 551cc236d74772dda5a4161d9bc5f497fd3d956eb87Mathieu Chartier private: 552cc236d74772dda5a4161d9bc5f497fd3d956eb87Mathieu Chartier MarkSweep* const mark_sweep_; 553cc236d74772dda5a4161d9bc5f497fd3d956eb87Mathieu Chartier}; 554cc236d74772dda5a4161d9bc5f497fd3d956eb87Mathieu Chartier 555407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartierclass DelayReferenceReferentVisitor { 556407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier public: 557407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier explicit DelayReferenceReferentVisitor(MarkSweep* collector) : collector_(collector) { 558407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier } 559407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier 560407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier void operator()(mirror::Class* klass, mirror::Reference* ref) const 561407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) 562407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) { 563407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier collector_->DelayReferenceReferent(klass, ref); 564407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier } 565407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier 566407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier private: 567407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier MarkSweep* const collector_; 568407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier}; 569407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier 57094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartiertemplate <bool kUseFinger = false> 57194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartierclass MarkStackTask : public Task { 57294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier public: 57394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier MarkStackTask(ThreadPool* thread_pool, MarkSweep* mark_sweep, size_t mark_stack_size, 574cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier StackReference<Object>* mark_stack) 57594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier : mark_sweep_(mark_sweep), 57694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier thread_pool_(thread_pool), 57794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier mark_stack_pos_(mark_stack_size) { 57894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // We may have to copy part of an existing mark stack when another mark stack overflows. 57994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier if (mark_stack_size != 0) { 58094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier DCHECK(mark_stack != NULL); 58194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // TODO: Check performance? 58294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier std::copy(mark_stack, mark_stack + mark_stack_size, mark_stack_); 58394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 58494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier if (kCountTasks) { 58594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier ++mark_sweep_->work_chunks_created_; 5861d54e73444e017d3a65234e0f193846f3e27472bIan Rogers } 587262e5ffa1d4b23f23af3dea762a71a0af4bfd4a9Mathieu Chartier } 588262e5ffa1d4b23f23af3dea762a71a0af4bfd4a9Mathieu Chartier 58994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier static const size_t kMaxSize = 1 * KB; 590cc236d74772dda5a4161d9bc5f497fd3d956eb87Mathieu Chartier 59194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier protected: 592407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier class MarkObjectParallelVisitor { 593407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier public: 594407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier explicit MarkObjectParallelVisitor(MarkStackTask<kUseFinger>* chunk_task, 595407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier MarkSweep* mark_sweep) ALWAYS_INLINE 596407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier : chunk_task_(chunk_task), mark_sweep_(mark_sweep) {} 597407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier 598407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier void operator()(Object* obj, MemberOffset offset, bool /* static */) const ALWAYS_INLINE 599407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 600b0fa5dc7769c1e054032f39de0a3f6d6dd06f8cfIan Rogers mirror::Object* ref = obj->GetFieldObject<mirror::Object>(offset); 601407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier if (ref != nullptr && mark_sweep_->MarkObjectParallel(ref)) { 602407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier if (kUseFinger) { 603407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier android_memory_barrier(); 604407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier if (reinterpret_cast<uintptr_t>(ref) >= 6053e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers static_cast<uintptr_t>(mark_sweep_->atomic_finger_.LoadRelaxed())) { 606407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier return; 607407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier } 608407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier } 609407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier chunk_task_->MarkStackPush(ref); 610407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier } 611407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier } 612407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier 613407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier private: 614407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier MarkStackTask<kUseFinger>* const chunk_task_; 615407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier MarkSweep* const mark_sweep_; 616407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier }; 617407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier 61894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier class ScanObjectParallelVisitor { 61994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier public: 62094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier explicit ScanObjectParallelVisitor(MarkStackTask<kUseFinger>* chunk_task) ALWAYS_INLINE 62194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier : chunk_task_(chunk_task) {} 62294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 623407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier // No thread safety analysis since multiple threads will use this visitor. 624407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier void operator()(Object* obj) const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) 625407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) { 626407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier MarkSweep* const mark_sweep = chunk_task_->mark_sweep_; 627407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier MarkObjectParallelVisitor mark_visitor(chunk_task_, mark_sweep); 628407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier DelayReferenceReferentVisitor ref_visitor(mark_sweep); 629407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier mark_sweep->ScanObjectVisit(obj, mark_visitor, ref_visitor); 63094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 63194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 63294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier private: 63394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier MarkStackTask<kUseFinger>* const chunk_task_; 63494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier }; 63594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 63694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier virtual ~MarkStackTask() { 63794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Make sure that we have cleared our mark stack. 63894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier DCHECK_EQ(mark_stack_pos_, 0U); 63994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier if (kCountTasks) { 64094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier ++mark_sweep_->work_chunks_deleted_; 6412b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier } 642cc236d74772dda5a4161d9bc5f497fd3d956eb87Mathieu Chartier } 643cc236d74772dda5a4161d9bc5f497fd3d956eb87Mathieu Chartier 64494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier MarkSweep* const mark_sweep_; 64594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier ThreadPool* const thread_pool_; 64694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Thread local mark stack for this task. 647cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier StackReference<Object> mark_stack_[kMaxSize]; 64894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Mark stack position. 64994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier size_t mark_stack_pos_; 65094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 651cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier ALWAYS_INLINE void MarkStackPush(Object* obj) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 65294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier if (UNLIKELY(mark_stack_pos_ == kMaxSize)) { 65394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Mark stack overflow, give 1/2 the stack to the thread pool as a new work task. 65494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier mark_stack_pos_ /= 2; 65594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier auto* task = new MarkStackTask(thread_pool_, mark_sweep_, kMaxSize - mark_stack_pos_, 65694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier mark_stack_ + mark_stack_pos_); 65794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier thread_pool_->AddTask(Thread::Current(), task); 65894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 65994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier DCHECK(obj != nullptr); 6600e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier DCHECK_LT(mark_stack_pos_, kMaxSize); 661cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier mark_stack_[mark_stack_pos_++].Assign(obj); 66294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 66394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 66494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier virtual void Finalize() { 66594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier delete this; 66694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 66794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 66894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Scans all of the objects 669407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier virtual void Run(Thread* self) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) 670407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) { 6716a3c1fcb4ba42ad4d5d142c17a3712a6ddd3866fIan Rogers UNUSED(self); 67294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier ScanObjectParallelVisitor visitor(this); 67394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // TODO: Tune this. 67494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier static const size_t kFifoSize = 4; 6750e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier BoundedFifoPowerOfTwo<Object*, kFifoSize> prefetch_fifo; 67694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier for (;;) { 6770e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier Object* obj = nullptr; 67894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier if (kUseMarkStackPrefetch) { 67994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier while (mark_stack_pos_ != 0 && prefetch_fifo.size() < kFifoSize) { 680cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier Object* const mark_stack_obj = mark_stack_[--mark_stack_pos_].AsMirrorPtr(); 681277ccbd200ea43590dfc06a93ae184a765327ad0Andreas Gampe DCHECK(mark_stack_obj != nullptr); 682277ccbd200ea43590dfc06a93ae184a765327ad0Andreas Gampe __builtin_prefetch(mark_stack_obj); 683277ccbd200ea43590dfc06a93ae184a765327ad0Andreas Gampe prefetch_fifo.push_back(mark_stack_obj); 68494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 68594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier if (UNLIKELY(prefetch_fifo.empty())) { 68694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier break; 68794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 68894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier obj = prefetch_fifo.front(); 68994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier prefetch_fifo.pop_front(); 69094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } else { 69194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier if (UNLIKELY(mark_stack_pos_ == 0)) { 69294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier break; 69394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 694cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier obj = mark_stack_[--mark_stack_pos_].AsMirrorPtr(); 69594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 69611409ae81a3eaf84d7fd2b3c85b8b06d2bae27f0Mathieu Chartier DCHECK(obj != nullptr); 6970e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier visitor(obj); 69894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 69994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 70094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier}; 70194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 70294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartierclass CardScanTask : public MarkStackTask<false> { 70394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier public: 704a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartier CardScanTask(ThreadPool* thread_pool, MarkSweep* mark_sweep, 705a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartier accounting::ContinuousSpaceBitmap* bitmap, 70613735955f39b3b304c37d2b2840663c131262c18Ian Rogers uint8_t* begin, uint8_t* end, uint8_t minimum_age, size_t mark_stack_size, 707cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier StackReference<Object>* mark_stack_obj, bool clear_card) 70894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier : MarkStackTask<false>(thread_pool, mark_sweep, mark_stack_size, mark_stack_obj), 70994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier bitmap_(bitmap), 71094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier begin_(begin), 71194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier end_(end), 712727b294b4091cf3cc2f8137cd654552f477fe46aLei Li minimum_age_(minimum_age), clear_card_(clear_card) { 71394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 71494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 71594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier protected: 716a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartier accounting::ContinuousSpaceBitmap* const bitmap_; 71713735955f39b3b304c37d2b2840663c131262c18Ian Rogers uint8_t* const begin_; 71813735955f39b3b304c37d2b2840663c131262c18Ian Rogers uint8_t* const end_; 71913735955f39b3b304c37d2b2840663c131262c18Ian Rogers const uint8_t minimum_age_; 720727b294b4091cf3cc2f8137cd654552f477fe46aLei Li const bool clear_card_; 72194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 72294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier virtual void Finalize() { 72394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier delete this; 72494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 72594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 72694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier virtual void Run(Thread* self) NO_THREAD_SAFETY_ANALYSIS { 72794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier ScanObjectParallelVisitor visitor(this); 72894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier accounting::CardTable* card_table = mark_sweep_->GetHeap()->GetCardTable(); 729727b294b4091cf3cc2f8137cd654552f477fe46aLei Li size_t cards_scanned = clear_card_ ? 730727b294b4091cf3cc2f8137cd654552f477fe46aLei Li card_table->Scan<true>(bitmap_, begin_, end_, visitor, minimum_age_) : 731727b294b4091cf3cc2f8137cd654552f477fe46aLei Li card_table->Scan<false>(bitmap_, begin_, end_, visitor, minimum_age_); 7320f72e4136aecaf6976fdb55916bbd7b6d5c9c77bMathieu Chartier VLOG(heap) << "Parallel scanning cards " << reinterpret_cast<void*>(begin_) << " - " 7330f72e4136aecaf6976fdb55916bbd7b6d5c9c77bMathieu Chartier << reinterpret_cast<void*>(end_) << " = " << cards_scanned; 73494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Finish by emptying our local mark stack. 73594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier MarkStackTask::Run(self); 73694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 737cc236d74772dda5a4161d9bc5f497fd3d956eb87Mathieu Chartier}; 738cc236d74772dda5a4161d9bc5f497fd3d956eb87Mathieu Chartier 7392775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartiersize_t MarkSweep::GetThreadCount(bool paused) const { 7402775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier if (heap_->GetThreadPool() == nullptr || !heap_->CareAboutPauseTimes()) { 741bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier return 1; 7422775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier } 74310d6886c9ce3ed87431cf10d376a69c23950fa61Mathieu Chartier return (paused ? heap_->GetParallelGCThreadCount() : heap_->GetConcGCThreadCount()) + 1; 7442775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier} 7452775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier 74613735955f39b3b304c37d2b2840663c131262c18Ian Rogersvoid MarkSweep::ScanGrayObjects(bool paused, uint8_t minimum_age) { 74794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier accounting::CardTable* card_table = GetHeap()->GetCardTable(); 74894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier ThreadPool* thread_pool = GetHeap()->GetThreadPool(); 7492775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier size_t thread_count = GetThreadCount(paused); 7502775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier // The parallel version with only one thread is faster for card scanning, TODO: fix. 751bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier if (kParallelCardScan && thread_count > 1) { 752720ef7680573c1afd12f99f02eee3045daee5168Mathieu Chartier Thread* self = Thread::Current(); 75394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Can't have a different split for each space since multiple spaces can have their cards being 75494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // scanned at the same time. 755f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(paused ? "(Paused)ScanGrayObjects" : __FUNCTION__, 756f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier GetTimings()); 75794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Try to take some of the mark stack since we can pass this off to the worker tasks. 758cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier StackReference<Object>* mark_stack_begin = mark_stack_->Begin(); 759cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier StackReference<Object>* mark_stack_end = mark_stack_->End(); 760720ef7680573c1afd12f99f02eee3045daee5168Mathieu Chartier const size_t mark_stack_size = mark_stack_end - mark_stack_begin; 76194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Estimated number of work tasks we will create. 76294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier const size_t mark_stack_tasks = GetHeap()->GetContinuousSpaces().size() * thread_count; 76394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier DCHECK_NE(mark_stack_tasks, 0U); 76494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier const size_t mark_stack_delta = std::min(CardScanTask::kMaxSize / 2, 76594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier mark_stack_size / mark_stack_tasks + 1); 76694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier for (const auto& space : GetHeap()->GetContinuousSpaces()) { 767590fee9e8972f872301c2d16a575d579ee564beeMathieu Chartier if (space->GetMarkBitmap() == nullptr) { 768590fee9e8972f872301c2d16a575d579ee564beeMathieu Chartier continue; 769590fee9e8972f872301c2d16a575d579ee564beeMathieu Chartier } 77013735955f39b3b304c37d2b2840663c131262c18Ian Rogers uint8_t* card_begin = space->Begin(); 77113735955f39b3b304c37d2b2840663c131262c18Ian Rogers uint8_t* card_end = space->End(); 7720941b0423537a6a5d7c1df6dd23e9864ea8f319cHiroshi Yamauchi // Align up the end address. For example, the image space's end 7730941b0423537a6a5d7c1df6dd23e9864ea8f319cHiroshi Yamauchi // may not be card-size-aligned. 7740941b0423537a6a5d7c1df6dd23e9864ea8f319cHiroshi Yamauchi card_end = AlignUp(card_end, accounting::CardTable::kCardSize); 7750941b0423537a6a5d7c1df6dd23e9864ea8f319cHiroshi Yamauchi DCHECK(IsAligned<accounting::CardTable::kCardSize>(card_begin)); 7760941b0423537a6a5d7c1df6dd23e9864ea8f319cHiroshi Yamauchi DCHECK(IsAligned<accounting::CardTable::kCardSize>(card_end)); 77794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Calculate how many bytes of heap we will scan, 77894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier const size_t address_range = card_end - card_begin; 77994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Calculate how much address range each task gets. 78094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier const size_t card_delta = RoundUp(address_range / thread_count + 1, 78194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier accounting::CardTable::kCardSize); 782727b294b4091cf3cc2f8137cd654552f477fe46aLei Li // If paused and the space is neither zygote nor image space, we could clear the dirty 783727b294b4091cf3cc2f8137cd654552f477fe46aLei Li // cards to avoid accumulating them to increase card scanning load in the following GC 784727b294b4091cf3cc2f8137cd654552f477fe46aLei Li // cycles. We need to keep dirty cards of image space and zygote space in order to track 785727b294b4091cf3cc2f8137cd654552f477fe46aLei Li // references to the other spaces. 786727b294b4091cf3cc2f8137cd654552f477fe46aLei Li bool clear_card = paused && !space->IsZygoteSpace() && !space->IsImageSpace(); 78794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Create the worker tasks for this space. 78894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier while (card_begin != card_end) { 78994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Add a range of cards. 79094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier size_t addr_remaining = card_end - card_begin; 79194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier size_t card_increment = std::min(card_delta, addr_remaining); 79294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Take from the back of the mark stack. 79394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier size_t mark_stack_remaining = mark_stack_end - mark_stack_begin; 79494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier size_t mark_stack_increment = std::min(mark_stack_delta, mark_stack_remaining); 79594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier mark_stack_end -= mark_stack_increment; 79694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier mark_stack_->PopBackCount(static_cast<int32_t>(mark_stack_increment)); 7970e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier DCHECK_EQ(mark_stack_end, mark_stack_->End()); 79894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Add the new task to the thread pool. 79994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier auto* task = new CardScanTask(thread_pool, this, space->GetMarkBitmap(), card_begin, 80094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier card_begin + card_increment, minimum_age, 801727b294b4091cf3cc2f8137cd654552f477fe46aLei Li mark_stack_increment, mark_stack_end, clear_card); 80294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier thread_pool->AddTask(self, task); 80394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier card_begin += card_increment; 80494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 80594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 8060f72e4136aecaf6976fdb55916bbd7b6d5c9c77bMathieu Chartier 8070941b0423537a6a5d7c1df6dd23e9864ea8f319cHiroshi Yamauchi // Note: the card scan below may dirty new cards (and scan them) 8080941b0423537a6a5d7c1df6dd23e9864ea8f319cHiroshi Yamauchi // as a side effect when a Reference object is encountered and 8090941b0423537a6a5d7c1df6dd23e9864ea8f319cHiroshi Yamauchi // queued during the marking. See b/11465268. 8102775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier thread_pool->SetMaxActiveWorkers(thread_count - 1); 81194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier thread_pool->StartWorkers(self); 8122775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier thread_pool->Wait(self, true, true); 81394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier thread_pool->StopWorkers(self); 81494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } else { 81594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier for (const auto& space : GetHeap()->GetContinuousSpaces()) { 816590fee9e8972f872301c2d16a575d579ee564beeMathieu Chartier if (space->GetMarkBitmap() != nullptr) { 817590fee9e8972f872301c2d16a575d579ee564beeMathieu Chartier // Image spaces are handled properly since live == marked for them. 818f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier const char* name = nullptr; 819590fee9e8972f872301c2d16a575d579ee564beeMathieu Chartier switch (space->GetGcRetentionPolicy()) { 820f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier case space::kGcRetentionPolicyNeverCollect: 821f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier name = paused ? "(Paused)ScanGrayImageSpaceObjects" : "ScanGrayImageSpaceObjects"; 822f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier break; 823f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier case space::kGcRetentionPolicyFullCollect: 824f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier name = paused ? "(Paused)ScanGrayZygoteSpaceObjects" : "ScanGrayZygoteSpaceObjects"; 825f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier break; 826f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier case space::kGcRetentionPolicyAlwaysCollect: 827f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier name = paused ? "(Paused)ScanGrayAllocSpaceObjects" : "ScanGrayAllocSpaceObjects"; 828f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier break; 829f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier default: 830f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier LOG(FATAL) << "Unreachable"; 8312c4257be8191c5eefde744e8965fcefc80a0a97dIan Rogers UNREACHABLE(); 832f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier } 833f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(name, GetTimings()); 834590fee9e8972f872301c2d16a575d579ee564beeMathieu Chartier ScanObjectVisitor visitor(this); 835727b294b4091cf3cc2f8137cd654552f477fe46aLei Li bool clear_card = paused && !space->IsZygoteSpace() && !space->IsImageSpace(); 836727b294b4091cf3cc2f8137cd654552f477fe46aLei Li if (clear_card) { 837727b294b4091cf3cc2f8137cd654552f477fe46aLei Li card_table->Scan<true>(space->GetMarkBitmap(), space->Begin(), space->End(), visitor, 838727b294b4091cf3cc2f8137cd654552f477fe46aLei Li minimum_age); 839727b294b4091cf3cc2f8137cd654552f477fe46aLei Li } else { 840727b294b4091cf3cc2f8137cd654552f477fe46aLei Li card_table->Scan<false>(space->GetMarkBitmap(), space->Begin(), space->End(), visitor, 841727b294b4091cf3cc2f8137cd654552f477fe46aLei Li minimum_age); 842727b294b4091cf3cc2f8137cd654552f477fe46aLei Li } 843590fee9e8972f872301c2d16a575d579ee564beeMathieu Chartier } 84494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 84594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 84694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier} 84794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 84894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartierclass RecursiveMarkTask : public MarkStackTask<false> { 84994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier public: 85094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier RecursiveMarkTask(ThreadPool* thread_pool, MarkSweep* mark_sweep, 851a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartier accounting::ContinuousSpaceBitmap* bitmap, uintptr_t begin, uintptr_t end) 852f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier : MarkStackTask<false>(thread_pool, mark_sweep, 0, NULL), bitmap_(bitmap), begin_(begin), 85394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier end_(end) { 85494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 85594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 85694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier protected: 857a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartier accounting::ContinuousSpaceBitmap* const bitmap_; 85894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier const uintptr_t begin_; 85994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier const uintptr_t end_; 86094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 86194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier virtual void Finalize() { 86294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier delete this; 86394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 86494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 86594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Scans all of the objects 86694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier virtual void Run(Thread* self) NO_THREAD_SAFETY_ANALYSIS { 86794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier ScanObjectParallelVisitor visitor(this); 86894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier bitmap_->VisitMarkedRange(begin_, end_, visitor); 86994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Finish by emptying our local mark stack. 87094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier MarkStackTask::Run(self); 87194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 87294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier}; 87394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 87458551df3c2646ed507feec9e9eb3768085a76059Carl Shapiro// Populates the mark stack based on the set of marked objects and 87558551df3c2646ed507feec9e9eb3768085a76059Carl Shapiro// recursively marks until the mark stack is emptied. 8762b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartiervoid MarkSweep::RecursiveMark() { 877f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 878a1602f28c0e3127ad511712d4b08db89737ae901Mathieu Chartier // RecursiveMark will build the lists of known instances of the Reference classes. See 879a1602f28c0e3127ad511712d4b08db89737ae901Mathieu Chartier // DelayReferenceReferent for details. 88094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier if (kUseRecursiveMark) { 88194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier const bool partial = GetGcType() == kGcTypePartial; 88294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier ScanObjectVisitor scan_visitor(this); 88394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier auto* self = Thread::Current(); 88494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier ThreadPool* thread_pool = heap_->GetThreadPool(); 8852775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier size_t thread_count = GetThreadCount(false); 8862775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier const bool parallel = kParallelRecursiveMark && thread_count > 1; 88794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier mark_stack_->Reset(); 88802e25119b15a6f619f17db99f5d05124a5807ff3Mathieu Chartier for (const auto& space : GetHeap()->GetContinuousSpaces()) { 8891d54e73444e017d3a65234e0f193846f3e27472bIan Rogers if ((space->GetGcRetentionPolicy() == space::kGcRetentionPolicyAlwaysCollect) || 8901d54e73444e017d3a65234e0f193846f3e27472bIan Rogers (!partial && space->GetGcRetentionPolicy() == space::kGcRetentionPolicyFullCollect)) { 8910e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier current_space_bitmap_ = space->GetMarkBitmap(); 8920e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier if (current_space_bitmap_ == nullptr) { 893590fee9e8972f872301c2d16a575d579ee564beeMathieu Chartier continue; 8942b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier } 89594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier if (parallel) { 89694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // We will use the mark stack the future. 89794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // CHECK(mark_stack_->IsEmpty()); 89894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // This function does not handle heap end increasing, so we must use the space end. 89994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier uintptr_t begin = reinterpret_cast<uintptr_t>(space->Begin()); 90094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier uintptr_t end = reinterpret_cast<uintptr_t>(space->End()); 9013e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers atomic_finger_.StoreRelaxed(AtomicInteger::MaxValue()); 90294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier 90394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Create a few worker tasks. 9042775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier const size_t n = thread_count * 2; 90594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier while (begin != end) { 90694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier uintptr_t start = begin; 90794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier uintptr_t delta = (end - begin) / n; 90894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier delta = RoundUp(delta, KB); 90994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier if (delta < 16 * KB) delta = end - begin; 91094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier begin += delta; 9110e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier auto* task = new RecursiveMarkTask(thread_pool, this, current_space_bitmap_, start, 91294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier begin); 91394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier thread_pool->AddTask(self, task); 91494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 9152775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier thread_pool->SetMaxActiveWorkers(thread_count - 1); 91694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier thread_pool->StartWorkers(self); 9172775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier thread_pool->Wait(self, true, true); 91894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier thread_pool->StopWorkers(self); 91994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } else { 92094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // This function does not handle heap end increasing, so we must use the space end. 92194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier uintptr_t begin = reinterpret_cast<uintptr_t>(space->Begin()); 92294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier uintptr_t end = reinterpret_cast<uintptr_t>(space->End()); 9230e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier current_space_bitmap_->VisitMarkedRange(begin, end, scan_visitor); 92494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 925357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier } 926357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier } 927357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier } 92894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier ProcessMarkStack(false); 92958551df3c2646ed507feec9e9eb3768085a76059Carl Shapiro} 93058551df3c2646ed507feec9e9eb3768085a76059Carl Shapiro 93183c8ee000d525017ead8753fce6bc1020249b96aMathieu Chartiermirror::Object* MarkSweep::IsMarkedCallback(mirror::Object* object, void* arg) { 9325712d5d04640925970db9c98938ffaf806b3962cMathieu Chartier if (reinterpret_cast<MarkSweep*>(arg)->IsMarked(object)) { 9336aa3df965395566ed6a4fec4af37c2b7577992e9Mathieu Chartier return object; 9346aa3df965395566ed6a4fec4af37c2b7577992e9Mathieu Chartier } 9356aa3df965395566ed6a4fec4af37c2b7577992e9Mathieu Chartier return nullptr; 936357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier} 937357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier 93813735955f39b3b304c37d2b2840663c131262c18Ian Rogersvoid MarkSweep::RecursiveMarkDirtyObjects(bool paused, uint8_t minimum_age) { 93994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier ScanGrayObjects(paused, minimum_age); 94094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier ProcessMarkStack(paused); 941262e5ffa1d4b23f23af3dea762a71a0af4bfd4a9Mathieu Chartier} 942262e5ffa1d4b23f23af3dea762a71a0af4bfd4a9Mathieu Chartier 94358551df3c2646ed507feec9e9eb3768085a76059Carl Shapirovoid MarkSweep::ReMarkRoots() { 944f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 945893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartier Locks::mutator_lock_->AssertExclusiveHeld(Thread::Current()); 946bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier Runtime::Current()->VisitRoots(this, static_cast<VisitRootFlags>( 947bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier kVisitRootFlagNewRoots | kVisitRootFlagStopLoggingNewRoots | kVisitRootFlagClearRootLog)); 9487bf9f190cd33a7e2f8584299eb889e9df66e0323Mathieu Chartier if (kVerifyRootsMarked) { 949277ccbd200ea43590dfc06a93ae184a765327ad0Andreas Gampe TimingLogger::ScopedTiming t2("(Paused)VerifyRoots", GetTimings()); 950bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier VerifyRootMarkedVisitor visitor(this); 951bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier Runtime::Current()->VisitRoots(&visitor); 952893263b7d5bc2ca43a91ecb8071867f5134fc60aMathieu Chartier } 95358551df3c2646ed507feec9e9eb3768085a76059Carl Shapiro} 95458551df3c2646ed507feec9e9eb3768085a76059Carl Shapiro 9550f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartiervoid MarkSweep::SweepSystemWeaks(Thread* self) { 956f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 9570f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier WriterMutexLock mu(self, *Locks::heap_bitmap_lock_); 9580f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier Runtime::Current()->SweepSystemWeaks(IsMarkedCallback, this); 95969759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro} 96069759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro 9616aa3df965395566ed6a4fec4af37c2b7577992e9Mathieu Chartiermirror::Object* MarkSweep::VerifySystemWeakIsLiveCallback(Object* obj, void* arg) { 962c7b83a0d8ac73bdfff751619ae2a34948e3534b7Mathieu Chartier reinterpret_cast<MarkSweep*>(arg)->VerifyIsLive(obj); 963c7b83a0d8ac73bdfff751619ae2a34948e3534b7Mathieu Chartier // We don't actually want to sweep the object, so lets return "marked" 9646aa3df965395566ed6a4fec4af37c2b7577992e9Mathieu Chartier return obj; 965c7b83a0d8ac73bdfff751619ae2a34948e3534b7Mathieu Chartier} 966c7b83a0d8ac73bdfff751619ae2a34948e3534b7Mathieu Chartier 967c7b83a0d8ac73bdfff751619ae2a34948e3534b7Mathieu Chartiervoid MarkSweep::VerifyIsLive(const Object* obj) { 9684aeec176eaf11fe03f342aadcbb79142230270edMathieu Chartier if (!heap_->GetLiveBitmap()->Test(obj)) { 969cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier // TODO: Consider live stack? Has this code bitrotted? 970cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier CHECK(!heap_->allocation_stack_->Contains(obj)) 971cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier << "Found dead object " << obj << "\n" << heap_->DumpSpaces(); 972c7b83a0d8ac73bdfff751619ae2a34948e3534b7Mathieu Chartier } 973c7b83a0d8ac73bdfff751619ae2a34948e3534b7Mathieu Chartier} 974c7b83a0d8ac73bdfff751619ae2a34948e3534b7Mathieu Chartier 975c7b83a0d8ac73bdfff751619ae2a34948e3534b7Mathieu Chartiervoid MarkSweep::VerifySystemWeaks() { 976f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 9776aa3df965395566ed6a4fec4af37c2b7577992e9Mathieu Chartier // Verify system weaks, uses a special object visitor which returns the input object. 9786aa3df965395566ed6a4fec4af37c2b7577992e9Mathieu Chartier Runtime::Current()->SweepSystemWeaks(VerifySystemWeakIsLiveCallback, this); 979c7b83a0d8ac73bdfff751619ae2a34948e3534b7Mathieu Chartier} 980c7b83a0d8ac73bdfff751619ae2a34948e3534b7Mathieu Chartier 981bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartierclass CheckpointMarkThreadRoots : public Closure, public RootVisitor { 982858f1c5fd5e528d0b16040ced74d4636046a42d8Mathieu Chartier public: 9830f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier explicit CheckpointMarkThreadRoots(MarkSweep* mark_sweep, 9840f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier bool revoke_ros_alloc_thread_local_buffers_at_checkpoint) 9850f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier : mark_sweep_(mark_sweep), 9860f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier revoke_ros_alloc_thread_local_buffers_at_checkpoint_( 9870f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier revoke_ros_alloc_thread_local_buffers_at_checkpoint) { 9880f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier } 989858f1c5fd5e528d0b16040ced74d4636046a42d8Mathieu Chartier 990bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier void VisitRoots(mirror::Object*** roots, size_t count, const RootInfo& info ATTRIBUTE_UNUSED) 991bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier OVERRIDE SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) 992bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) { 993bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier for (size_t i = 0; i < count; ++i) { 994bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier mark_sweep_->MarkObjectNonNullParallel(*roots[i]); 995bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier } 996bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier } 997bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier 998bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier void VisitRoots(mirror::CompressedReference<mirror::Object>** roots, size_t count, 999bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier const RootInfo& info ATTRIBUTE_UNUSED) 1000bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier OVERRIDE SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) 1001bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) { 1002bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier for (size_t i = 0; i < count; ++i) { 1003bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier mark_sweep_->MarkObjectNonNullParallel(roots[i]->AsMirrorPtr()); 1004bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier } 1005bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier } 1006bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier 10074aeec176eaf11fe03f342aadcbb79142230270edMathieu Chartier virtual void Run(Thread* thread) OVERRIDE NO_THREAD_SAFETY_ANALYSIS { 10083f9667022788ba1effcd1e47fc9e3decc4db569dMathieu Chartier ATRACE_BEGIN("Marking thread roots"); 1009858f1c5fd5e528d0b16040ced74d4636046a42d8Mathieu Chartier // Note: self is not necessarily equal to thread since thread may be suspended. 1010bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier Thread* const self = Thread::Current(); 1011d22d54849c96760aa1efa259d6dcfbace54da2afMathieu Chartier CHECK(thread == self || thread->IsSuspended() || thread->GetState() == kWaitingPerformingGc) 1012d22d54849c96760aa1efa259d6dcfbace54da2afMathieu Chartier << thread->GetState() << " thread " << thread << " self " << self; 1013bb87e0f1a52de656bc77cb01cb887e51a0e5198bMathieu Chartier thread->VisitRoots(this); 10143f9667022788ba1effcd1e47fc9e3decc4db569dMathieu Chartier ATRACE_END(); 10150f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier if (revoke_ros_alloc_thread_local_buffers_at_checkpoint_) { 10160f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier ATRACE_BEGIN("RevokeRosAllocThreadLocalBuffers"); 1017c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchi mark_sweep_->GetHeap()->RevokeRosAllocThreadLocalBuffers(thread); 10180f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier ATRACE_END(); 1019c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchi } 1020dd9943d4466b052ef6c5ee5b32187adb48cbce74Lei Li // If thread is a running mutator, then act on behalf of the garbage collector. 1021dd9943d4466b052ef6c5ee5b32187adb48cbce74Lei Li // See the code in ThreadList::RunCheckpoint. 1022dd9943d4466b052ef6c5ee5b32187adb48cbce74Lei Li if (thread->GetState() == kRunnable) { 1023dd9943d4466b052ef6c5ee5b32187adb48cbce74Lei Li mark_sweep_->GetBarrier().Pass(self); 1024dd9943d4466b052ef6c5ee5b32187adb48cbce74Lei Li } 1025858f1c5fd5e528d0b16040ced74d4636046a42d8Mathieu Chartier } 1026858f1c5fd5e528d0b16040ced74d4636046a42d8Mathieu Chartier 1027858f1c5fd5e528d0b16040ced74d4636046a42d8Mathieu Chartier private: 10284aeec176eaf11fe03f342aadcbb79142230270edMathieu Chartier MarkSweep* const mark_sweep_; 10290f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier const bool revoke_ros_alloc_thread_local_buffers_at_checkpoint_; 1030858f1c5fd5e528d0b16040ced74d4636046a42d8Mathieu Chartier}; 1031858f1c5fd5e528d0b16040ced74d4636046a42d8Mathieu Chartier 10320f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartiervoid MarkSweep::MarkRootsCheckpoint(Thread* self, 10330f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier bool revoke_ros_alloc_thread_local_buffers_at_checkpoint) { 1034f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 10350f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier CheckpointMarkThreadRoots check_point(this, revoke_ros_alloc_thread_local_buffers_at_checkpoint); 1036858f1c5fd5e528d0b16040ced74d4636046a42d8Mathieu Chartier ThreadList* thread_list = Runtime::Current()->GetThreadList(); 10371d54e73444e017d3a65234e0f193846f3e27472bIan Rogers // Request the check point is run on all threads returning a count of the threads that must 10381d54e73444e017d3a65234e0f193846f3e27472bIan Rogers // run through the barrier including self. 10391d54e73444e017d3a65234e0f193846f3e27472bIan Rogers size_t barrier_count = thread_list->RunCheckpoint(&check_point); 10401d54e73444e017d3a65234e0f193846f3e27472bIan Rogers // Release locks then wait for all mutator threads to pass the barrier. 1041dd9943d4466b052ef6c5ee5b32187adb48cbce74Lei Li // If there are no threads to wait which implys that all the checkpoint functions are finished, 1042dd9943d4466b052ef6c5ee5b32187adb48cbce74Lei Li // then no need to release locks. 1043dd9943d4466b052ef6c5ee5b32187adb48cbce74Lei Li if (barrier_count == 0) { 1044dd9943d4466b052ef6c5ee5b32187adb48cbce74Lei Li return; 1045dd9943d4466b052ef6c5ee5b32187adb48cbce74Lei Li } 10461d54e73444e017d3a65234e0f193846f3e27472bIan Rogers Locks::heap_bitmap_lock_->ExclusiveUnlock(self); 10471d54e73444e017d3a65234e0f193846f3e27472bIan Rogers Locks::mutator_lock_->SharedUnlock(self); 10484aeec176eaf11fe03f342aadcbb79142230270edMathieu Chartier { 10494aeec176eaf11fe03f342aadcbb79142230270edMathieu Chartier ScopedThreadStateChange tsc(self, kWaitingForCheckPointsToRun); 10504aeec176eaf11fe03f342aadcbb79142230270edMathieu Chartier gc_barrier_->Increment(self, barrier_count); 10514aeec176eaf11fe03f342aadcbb79142230270edMathieu Chartier } 10521d54e73444e017d3a65234e0f193846f3e27472bIan Rogers Locks::mutator_lock_->SharedLock(self); 10531d54e73444e017d3a65234e0f193846f3e27472bIan Rogers Locks::heap_bitmap_lock_->ExclusiveLock(self); 1054858f1c5fd5e528d0b16040ced74d4636046a42d8Mathieu Chartier} 1055858f1c5fd5e528d0b16040ced74d4636046a42d8Mathieu Chartier 10561d54e73444e017d3a65234e0f193846f3e27472bIan Rogersvoid MarkSweep::SweepArray(accounting::ObjectStack* allocations, bool swap_bitmaps) { 1057f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 1058e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier Thread* self = Thread::Current(); 1059bbdc5bc5fd5141711879a6c85d80ac45b7aad5d0Hiroshi Yamauchi mirror::Object** chunk_free_buffer = reinterpret_cast<mirror::Object**>( 1060bbdc5bc5fd5141711879a6c85d80ac45b7aad5d0Hiroshi Yamauchi sweep_array_free_buffer_mem_map_->BaseBegin()); 1061e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier size_t chunk_free_pos = 0; 106210fb83ad7442c8cf3356a89ec918e0786f110981Mathieu Chartier ObjectBytePair freed; 106310fb83ad7442c8cf3356a89ec918e0786f110981Mathieu Chartier ObjectBytePair freed_los; 1064e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier // How many objects are left in the array, modified after each space is swept. 1065cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier StackReference<Object>* objects = allocations->Begin(); 1066e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier size_t count = allocations->Size(); 1067e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier // Change the order to ensure that the non-moving space last swept as an optimization. 1068e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier std::vector<space::ContinuousSpace*> sweep_spaces; 1069e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier space::ContinuousSpace* non_moving_space = nullptr; 1070e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier for (space::ContinuousSpace* space : heap_->GetContinuousSpaces()) { 10718d562103c3a3452fb15ef4b1c64df767b70507a4Mathieu Chartier if (space->IsAllocSpace() && !immune_region_.ContainsSpace(space) && 10728d562103c3a3452fb15ef4b1c64df767b70507a4Mathieu Chartier space->GetLiveBitmap() != nullptr) { 1073e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier if (space == heap_->GetNonMovingSpace()) { 1074e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier non_moving_space = space; 1075e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier } else { 1076e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier sweep_spaces.push_back(space); 1077e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier } 1078e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier } 1079e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier } 1080e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier // Unlikely to sweep a significant amount of non_movable objects, so we do these after the after 1081e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier // the other alloc spaces as an optimization. 1082e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier if (non_moving_space != nullptr) { 1083e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier sweep_spaces.push_back(non_moving_space); 1084e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier } 1085e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier // Start by sweeping the continuous spaces. 1086e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier for (space::ContinuousSpace* space : sweep_spaces) { 1087e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier space::AllocSpace* alloc_space = space->AsAllocSpace(); 1088a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartier accounting::ContinuousSpaceBitmap* live_bitmap = space->GetLiveBitmap(); 1089a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartier accounting::ContinuousSpaceBitmap* mark_bitmap = space->GetMarkBitmap(); 1090e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier if (swap_bitmaps) { 1091e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier std::swap(live_bitmap, mark_bitmap); 1092e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier } 1093cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier StackReference<Object>* out = objects; 1094e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier for (size_t i = 0; i < count; ++i) { 1095cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier Object* const obj = objects[i].AsMirrorPtr(); 1096f5b0e20b5b31f5f5465784adcf2a204dcd69c7fdHiroshi Yamauchi if (kUseThreadLocalAllocationStack && obj == nullptr) { 1097f5b0e20b5b31f5f5465784adcf2a204dcd69c7fdHiroshi Yamauchi continue; 1098f5b0e20b5b31f5f5465784adcf2a204dcd69c7fdHiroshi Yamauchi } 1099e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier if (space->HasAddress(obj)) { 1100e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier // This object is in the space, remove it from the array and add it to the sweep buffer 1101e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier // if needed. 1102e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier if (!mark_bitmap->Test(obj)) { 1103e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier if (chunk_free_pos >= kSweepArrayChunkFreeSize) { 1104277ccbd200ea43590dfc06a93ae184a765327ad0Andreas Gampe TimingLogger::ScopedTiming t2("FreeList", GetTimings()); 110510fb83ad7442c8cf3356a89ec918e0786f110981Mathieu Chartier freed.objects += chunk_free_pos; 110610fb83ad7442c8cf3356a89ec918e0786f110981Mathieu Chartier freed.bytes += alloc_space->FreeList(self, chunk_free_pos, chunk_free_buffer); 1107e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier chunk_free_pos = 0; 1108e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier } 1109e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier chunk_free_buffer[chunk_free_pos++] = obj; 1110e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier } 1111e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier } else { 1112cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier (out++)->Assign(obj); 1113e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier } 1114e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier } 1115e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier if (chunk_free_pos > 0) { 1116277ccbd200ea43590dfc06a93ae184a765327ad0Andreas Gampe TimingLogger::ScopedTiming t2("FreeList", GetTimings()); 111710fb83ad7442c8cf3356a89ec918e0786f110981Mathieu Chartier freed.objects += chunk_free_pos; 111810fb83ad7442c8cf3356a89ec918e0786f110981Mathieu Chartier freed.bytes += alloc_space->FreeList(self, chunk_free_pos, chunk_free_buffer); 1119e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier chunk_free_pos = 0; 1120e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier } 1121e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier // All of the references which space contained are no longer in the allocation stack, update 1122e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier // the count. 1123e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier count = out - objects; 1124e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier } 1125e6da9af8dfe0a3e3fbc2be700554f6478380e7b9Mathieu Chartier // Handle the large object space. 11261d54e73444e017d3a65234e0f193846f3e27472bIan Rogers space::LargeObjectSpace* large_object_space = GetHeap()->GetLargeObjectsSpace(); 11272dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier if (large_object_space != nullptr) { 11282dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier accounting::LargeObjectBitmap* large_live_objects = large_object_space->GetLiveBitmap(); 11292dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier accounting::LargeObjectBitmap* large_mark_objects = large_object_space->GetMarkBitmap(); 11302dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier if (swap_bitmaps) { 11312dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier std::swap(large_live_objects, large_mark_objects); 1132f5b0e20b5b31f5f5465784adcf2a204dcd69c7fdHiroshi Yamauchi } 11332dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier for (size_t i = 0; i < count; ++i) { 1134cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier Object* const obj = objects[i].AsMirrorPtr(); 11352dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier // Handle large objects. 11362dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier if (kUseThreadLocalAllocationStack && obj == nullptr) { 11372dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier continue; 11382dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier } 11392dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier if (!large_mark_objects->Test(obj)) { 11402dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier ++freed_los.objects; 11412dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier freed_los.bytes += large_object_space->Free(self, obj); 11422dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier } 1143357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier } 1144357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier } 1145f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier { 1146277ccbd200ea43590dfc06a93ae184a765327ad0Andreas Gampe TimingLogger::ScopedTiming t2("RecordFree", GetTimings()); 1147f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier RecordFree(freed); 1148f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier RecordFreeLOS(freed_los); 1149277ccbd200ea43590dfc06a93ae184a765327ad0Andreas Gampe t2.NewTiming("ResetStack"); 1150f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier allocations->Reset(); 1151f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier } 1152c5f17732d8144491c642776b6b48c85dfadf4b52Ian Rogers sweep_array_free_buffer_mem_map_->MadviseDontNeedAndZero(); 1153357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier} 1154357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier 11551d54e73444e017d3a65234e0f193846f3e27472bIan Rogersvoid MarkSweep::Sweep(bool swap_bitmaps) { 1156f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 11570f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier // Ensure that nobody inserted items in the live stack after we swapped the stacks. 11580f7bf6a3ad1798fde328a2bff48a4bf2d750a36bMathieu Chartier CHECK_GE(live_stack_freeze_size_, GetHeap()->GetLiveStack()->Size()); 1159f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier { 1160f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t2("MarkAllocStackAsLive", GetTimings()); 1161f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier // Mark everything allocated since the last as GC live so that we can sweep concurrently, 1162f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier // knowing that new allocations won't be marked as live. 1163f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier accounting::ObjectStack* live_stack = heap_->GetLiveStack(); 1164f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier heap_->MarkAllocStackAsLive(live_stack); 1165f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier live_stack->Reset(); 1166f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier DCHECK(mark_stack_->IsEmpty()); 1167f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier } 116802e25119b15a6f619f17db99f5d05124a5807ff3Mathieu Chartier for (const auto& space : GetHeap()->GetContinuousSpaces()) { 1169a1602f28c0e3127ad511712d4b08db89737ae901Mathieu Chartier if (space->IsContinuousMemMapAllocSpace()) { 1170a1602f28c0e3127ad511712d4b08db89737ae901Mathieu Chartier space::ContinuousMemMapAllocSpace* alloc_space = space->AsContinuousMemMapAllocSpace(); 1171f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming split( 117210fb83ad7442c8cf3356a89ec918e0786f110981Mathieu Chartier alloc_space->IsZygoteSpace() ? "SweepZygoteSpace" : "SweepMallocSpace", GetTimings()); 117310fb83ad7442c8cf3356a89ec918e0786f110981Mathieu Chartier RecordFree(alloc_space->Sweep(swap_bitmaps)); 117458551df3c2646ed507feec9e9eb3768085a76059Carl Shapiro } 117558551df3c2646ed507feec9e9eb3768085a76059Carl Shapiro } 11762b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier SweepLargeObjects(swap_bitmaps); 117758551df3c2646ed507feec9e9eb3768085a76059Carl Shapiro} 117858551df3c2646ed507feec9e9eb3768085a76059Carl Shapiro 1179e0f0cb3d855cb5e926452b5e1ec8457adc4e454eMathieu Chartiervoid MarkSweep::SweepLargeObjects(bool swap_bitmaps) { 11802dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier space::LargeObjectSpace* los = heap_->GetLargeObjectsSpace(); 11812dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier if (los != nullptr) { 11822dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier TimingLogger::ScopedTiming split(__FUNCTION__, GetTimings()); 11832dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier RecordFreeLOS(los->Sweep(swap_bitmaps)); 11842dbe627954fd78a3659ab3cd42d2ead5b4529441Mathieu Chartier } 1185e0f0cb3d855cb5e926452b5e1ec8457adc4e454eMathieu Chartier} 1186e0f0cb3d855cb5e926452b5e1ec8457adc4e454eMathieu Chartier 1187407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier// Process the "referent" field in a java.lang.ref.Reference. If the referent has not yet been 1188407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier// marked, put it on the appropriate list in the heap for later processing. 1189407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartiervoid MarkSweep::DelayReferenceReferent(mirror::Class* klass, mirror::Reference* ref) { 11900e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier if (kCountJavaLangRefs) { 11910e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier ++reference_count_; 11920e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier } 1193308351ada0008b0cbe1a5afc31c302c975554ee4Mathieu Chartier heap_->GetReferenceProcessor()->DelayReferenceReferent(klass, ref, &HeapReferenceMarkedCallback, 1194308351ada0008b0cbe1a5afc31c302c975554ee4Mathieu Chartier this); 119569759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro} 119669759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro 119702b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartierclass MarkObjectVisitor { 119802b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier public: 1199407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier explicit MarkObjectVisitor(MarkSweep* const mark_sweep) ALWAYS_INLINE : mark_sweep_(mark_sweep) { 1200407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier } 120102b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier 1202407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier void operator()(Object* obj, MemberOffset offset, bool /* is_static */) const 1203407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier ALWAYS_INLINE SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) 1204407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) { 120594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier if (kCheckLocks) { 12062b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier Locks::mutator_lock_->AssertSharedHeld(Thread::Current()); 12072b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier Locks::heap_bitmap_lock_->AssertExclusiveHeld(Thread::Current()); 12082b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartier } 1209b0fa5dc7769c1e054032f39de0a3f6d6dd06f8cfIan Rogers mark_sweep_->MarkObject(obj->GetFieldObject<mirror::Object>(offset)); 121002b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier } 121102b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier 121202b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier private: 121302b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier MarkSweep* const mark_sweep_; 121402b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier}; 121502b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier 121669759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro// Scans an object reference. Determines the type of the reference 121769759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro// and dispatches to a specialized scanning routine. 1218590fee9e8972f872301c2d16a575d579ee564beeMathieu Chartiervoid MarkSweep::ScanObject(Object* obj) { 1219407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier MarkObjectVisitor mark_visitor(this); 1220407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier DelayReferenceReferentVisitor ref_visitor(this); 1221407f702da4f867c074fc3c8c688b8f8c32279effMathieu Chartier ScanObjectVisit(obj, mark_visitor, ref_visitor); 122202b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier} 122302b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier 122478f7b4c04ab6e8b5581921bc95b67a9beee1c246Mathieu Chartiervoid MarkSweep::ProcessMarkStackCallback(void* arg) { 122578f7b4c04ab6e8b5581921bc95b67a9beee1c246Mathieu Chartier reinterpret_cast<MarkSweep*>(arg)->ProcessMarkStack(false); 12263bb57c7b41bf5419fe895e7aa664d8d430205ba8Mathieu Chartier} 12273bb57c7b41bf5419fe895e7aa664d8d430205ba8Mathieu Chartier 12282775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartiervoid MarkSweep::ProcessMarkStackParallel(size_t thread_count) { 122902b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier Thread* self = Thread::Current(); 123002b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier ThreadPool* thread_pool = GetHeap()->GetThreadPool(); 12312775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier const size_t chunk_size = std::min(mark_stack_->Size() / thread_count + 1, 12322775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier static_cast<size_t>(MarkStackTask<false>::kMaxSize)); 123394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier CHECK_GT(chunk_size, 0U); 123494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // Split the current mark stack up into work tasks. 1235cb535da36915f9d10bec3880b46f1de1f7a69f22Mathieu Chartier for (auto* it = mark_stack_->Begin(), *end = mark_stack_->End(); it < end; ) { 123694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier const size_t delta = std::min(static_cast<size_t>(end - it), chunk_size); 12370e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier thread_pool->AddTask(self, new MarkStackTask<false>(thread_pool, this, delta, it)); 123894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier it += delta; 123902b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier } 12402775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier thread_pool->SetMaxActiveWorkers(thread_count - 1); 124102b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier thread_pool->StartWorkers(self); 12422775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier thread_pool->Wait(self, true, true); 124394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier thread_pool->StopWorkers(self); 124402b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier mark_stack_->Reset(); 12453e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers CHECK_EQ(work_chunks_created_.LoadSequentiallyConsistent(), 12463e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers work_chunks_deleted_.LoadSequentiallyConsistent()) 12473e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers << " some of the work chunks were leaked"; 124869759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro} 124969759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro 12505d76c435082332ef79a22962386fa92a0870e378Ian Rogers// Scan anything that's on the mark stack. 125194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartiervoid MarkSweep::ProcessMarkStack(bool paused) { 1252f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(paused ? "(Paused)ProcessMarkStack" : __FUNCTION__, GetTimings()); 12532775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier size_t thread_count = GetThreadCount(paused); 12542775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier if (kParallelProcessMarkStack && thread_count > 1 && 12552775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier mark_stack_->Size() >= kMinimumParallelMarkStackSize) { 12562775ee4f82dff260663ca16adddc0b15327aaa42Mathieu Chartier ProcessMarkStackParallel(thread_count); 125794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } else { 125894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier // TODO: Tune this. 125994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier static const size_t kFifoSize = 4; 1260590fee9e8972f872301c2d16a575d579ee564beeMathieu Chartier BoundedFifoPowerOfTwo<Object*, kFifoSize> prefetch_fifo; 1261d8195f19840911a73b1491dfc8e7c18139753731Mathieu Chartier for (;;) { 1262590fee9e8972f872301c2d16a575d579ee564beeMathieu Chartier Object* obj = NULL; 126394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier if (kUseMarkStackPrefetch) { 126494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier while (!mark_stack_->IsEmpty() && prefetch_fifo.size() < kFifoSize) { 1265277ccbd200ea43590dfc06a93ae184a765327ad0Andreas Gampe Object* mark_stack_obj = mark_stack_->PopBack(); 1266277ccbd200ea43590dfc06a93ae184a765327ad0Andreas Gampe DCHECK(mark_stack_obj != NULL); 1267277ccbd200ea43590dfc06a93ae184a765327ad0Andreas Gampe __builtin_prefetch(mark_stack_obj); 1268277ccbd200ea43590dfc06a93ae184a765327ad0Andreas Gampe prefetch_fifo.push_back(mark_stack_obj); 126994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 127094c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier if (prefetch_fifo.empty()) { 127194c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier break; 127294c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 127394c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier obj = prefetch_fifo.front(); 127494c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier prefetch_fifo.pop_front(); 127594c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } else { 127694c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier if (mark_stack_->IsEmpty()) { 127794c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier break; 127894c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier } 127994c32c5f01c7d44781317bf23933ed0a5bc4b796Mathieu Chartier obj = mark_stack_->PopBack(); 1280d8195f19840911a73b1491dfc8e7c18139753731Mathieu Chartier } 12814aeec176eaf11fe03f342aadcbb79142230270edMathieu Chartier DCHECK(obj != nullptr); 1282d8195f19840911a73b1491dfc8e7c18139753731Mathieu Chartier ScanObject(obj); 1283357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier } 1284357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier } 128569759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro} 128669759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro 128752e4b43d62896b56f8c2bd041e528472bb4a0d8dMathieu Chartierinline bool MarkSweep::IsMarked(const Object* object) const { 12888d562103c3a3452fb15ef4b1c64df767b70507a4Mathieu Chartier if (immune_region_.ContainsObject(object)) { 12897469ebf3888b8037421cb6834f37f946646265ecMathieu Chartier return true; 12907469ebf3888b8037421cb6834f37f946646265ecMathieu Chartier } 12910e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier if (current_space_bitmap_->HasAddress(object)) { 12920e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier return current_space_bitmap_->Test(object); 12937469ebf3888b8037421cb6834f37f946646265ecMathieu Chartier } 12940e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier return mark_bitmap_->Test(object); 12957469ebf3888b8037421cb6834f37f946646265ecMathieu Chartier} 12967469ebf3888b8037421cb6834f37f946646265ecMathieu Chartier 12972b82db45c09450022199376c3a5420eacf2aa81eMathieu Chartiervoid MarkSweep::FinishPhase() { 1298f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 1299d22d54849c96760aa1efa259d6dcfbace54da2afMathieu Chartier if (kCountScannedTypes) { 13003e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers VLOG(gc) << "MarkSweep scanned classes=" << class_count_.LoadRelaxed() 13013e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers << " arrays=" << array_count_.LoadRelaxed() << " other=" << other_count_.LoadRelaxed(); 130202b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier } 130302b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier if (kCountTasks) { 13043e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers VLOG(gc) << "Total number of work chunks allocated: " << work_chunks_created_.LoadRelaxed(); 130502b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier } 130602b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier if (kMeasureOverhead) { 13073e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers VLOG(gc) << "Overhead time " << PrettyDuration(overhead_time_.LoadRelaxed()); 130802b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier } 130902b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier if (kProfileLargeObjects) { 13103e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers VLOG(gc) << "Large objects tested " << large_object_test_.LoadRelaxed() 13113e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers << " marked " << large_object_mark_.LoadRelaxed(); 131202b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier } 1313d22d54849c96760aa1efa259d6dcfbace54da2afMathieu Chartier if (kCountJavaLangRefs) { 13143e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers VLOG(gc) << "References scanned " << reference_count_.LoadRelaxed(); 131502b6a78038f12c109f95eb31713cfc747f5512f1Mathieu Chartier } 13160e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier if (kCountMarkedObjects) { 13173e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers VLOG(gc) << "Marked: null=" << mark_null_count_.LoadRelaxed() 13183e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers << " immune=" << mark_immune_count_.LoadRelaxed() 13193e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers << " fastpath=" << mark_fastpath_count_.LoadRelaxed() 13203e5cf305db800b2989ad57b7cde8fb3cc9fa1b9eIan Rogers << " slowpath=" << mark_slowpath_count_.LoadRelaxed(); 13210e54cd0d8fc635d3dc8bf88a465fdade151a098fMathieu Chartier } 13224aeec176eaf11fe03f342aadcbb79142230270edMathieu Chartier CHECK(mark_stack_->IsEmpty()); // Ensure that the mark stack is empty. 13235301cd241b4d8afbfc1211e107c41f1b15c6bd48Mathieu Chartier mark_stack_->Reset(); 13244aeec176eaf11fe03f342aadcbb79142230270edMathieu Chartier WriterMutexLock mu(Thread::Current(), *Locks::heap_bitmap_lock_); 13254aeec176eaf11fe03f342aadcbb79142230270edMathieu Chartier heap_->ClearMarkedObjects(); 132669759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro} 132769759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro 1328c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchivoid MarkSweep::RevokeAllThreadLocalBuffers() { 1329c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchi if (kRevokeRosAllocThreadLocalBuffersAtCheckpoint && IsConcurrent()) { 1330c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchi // If concurrent, rosalloc thread-local buffers are revoked at the 1331c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchi // thread checkpoint. Bump pointer space thread-local buffers must 1332c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchi // not be in use. 1333c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchi GetHeap()->AssertAllBumpPointerSpaceThreadLocalBuffersAreRevoked(); 1334c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchi } else { 1335f5997b4d3f889569d5a2b724d83d764bfbb8d106Mathieu Chartier TimingLogger::ScopedTiming t(__FUNCTION__, GetTimings()); 1336c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchi GetHeap()->RevokeAllThreadLocalBuffers(); 1337c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchi } 1338c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchi} 1339c93c530efc175954160c3834c93961a1a946a35aHiroshi Yamauchi 13401d54e73444e017d3a65234e0f193846f3e27472bIan Rogers} // namespace collector 13411d54e73444e017d3a65234e0f193846f3e27472bIan Rogers} // namespace gc 134269759eaa6fd4386f1e6d8748052ad221087b3476Carl Shapiro} // namespace art 1343