| // Copyright 2015 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "gin/v8_isolate_memory_dump_provider.h" |
| |
| #include <inttypes.h> |
| #include <stddef.h> |
| |
| #include "base/strings/stringprintf.h" |
| #include "base/trace_event/memory_dump_manager.h" |
| #include "base/trace_event/process_memory_dump.h" |
| #include "gin/public/isolate_holder.h" |
| #include "v8/include/v8.h" |
| |
| namespace gin { |
| |
| V8IsolateMemoryDumpProvider::V8IsolateMemoryDumpProvider( |
| IsolateHolder* isolate_holder, |
| scoped_refptr<base::SingleThreadTaskRunner> task_runner) |
| : isolate_holder_(isolate_holder) { |
| DCHECK(task_runner); |
| base::trace_event::MemoryDumpManager::GetInstance()->RegisterDumpProvider( |
| this, "V8Isolate", task_runner); |
| } |
| |
| V8IsolateMemoryDumpProvider::~V8IsolateMemoryDumpProvider() { |
| base::trace_event::MemoryDumpManager::GetInstance()->UnregisterDumpProvider( |
| this); |
| } |
| |
| // Called at trace dump point time. Creates a snapshot with the memory counters |
| // for the current isolate. |
| bool V8IsolateMemoryDumpProvider::OnMemoryDump( |
| const base::trace_event::MemoryDumpArgs& args, |
| base::trace_event::ProcessMemoryDump* process_memory_dump) { |
| // TODO(ssid): Use MemoryDumpArgs to create light dumps when requested |
| // (crbug.com/499731). |
| |
| if (isolate_holder_->access_mode() == IsolateHolder::kUseLocker) { |
| v8::Locker locked(isolate_holder_->isolate()); |
| DumpHeapStatistics(args, process_memory_dump); |
| } else { |
| DumpHeapStatistics(args, process_memory_dump); |
| } |
| return true; |
| } |
| |
| namespace { |
| |
| // Dump statistics related to code/bytecode when memory-infra.v8.code_stats is |
| // enabled. |
| void DumpCodeStatistics(base::trace_event::MemoryAllocatorDump* dump, |
| IsolateHolder* isolate_holder) { |
| // Collecting code statistics is an expensive operation (~10 ms) when |
| // compared to other v8 metrics (< 1 ms). So, dump them only when |
| // memory-infra.v8.code_stats is enabled. |
| // TODO(primiano): This information should be plumbed through TraceConfig. |
| // See crbug.com/616441. |
| bool dump_code_stats = false; |
| TRACE_EVENT_CATEGORY_GROUP_ENABLED( |
| TRACE_DISABLED_BY_DEFAULT("memory-infra.v8.code_stats"), |
| &dump_code_stats); |
| if (!dump_code_stats) |
| return; |
| |
| v8::HeapCodeStatistics code_statistics; |
| if (!isolate_holder->isolate()->GetHeapCodeAndMetadataStatistics( |
| &code_statistics)) { |
| return; |
| } |
| |
| dump->AddScalar("code_and_metadata_size", |
| base::trace_event::MemoryAllocatorDump::kUnitsBytes, |
| code_statistics.code_and_metadata_size()); |
| dump->AddScalar("bytecode_and_metadata_size", |
| base::trace_event::MemoryAllocatorDump::kUnitsBytes, |
| code_statistics.bytecode_and_metadata_size()); |
| dump->AddScalar("external_script_source_size", |
| base::trace_event::MemoryAllocatorDump::kUnitsBytes, |
| code_statistics.external_script_source_size()); |
| } |
| |
| // Dump the number of native and detached contexts. |
| // The result looks as follows in the Chrome trace viewer: |
| // ======================================== |
| // Component object_count |
| // - v8 |
| // - main |
| // - contexts |
| // - detached_context 10 |
| // - native_context 20 |
| // - workers |
| // - contexts |
| // - detached_context |
| // - isolate_0x1234 10 |
| // - native_context |
| // - isolate_0x1234 20 |
| // ======================================== |
| void DumpContextStatistics( |
| base::trace_event::ProcessMemoryDump* process_memory_dump, |
| std::string dump_base_name, |
| std::string dump_name_suffix, |
| size_t number_of_detached_contexts, |
| size_t number_of_native_contexts) { |
| std::string dump_name_prefix = dump_base_name + "/contexts"; |
| std::string native_context_name = |
| dump_name_prefix + "/native_context" + dump_name_suffix; |
| auto* native_context_dump = |
| process_memory_dump->CreateAllocatorDump(native_context_name); |
| native_context_dump->AddScalar( |
| "object_count", base::trace_event::MemoryAllocatorDump::kUnitsObjects, |
| number_of_native_contexts); |
| std::string detached_context_name = |
| dump_name_prefix + "/detached_context" + dump_name_suffix; |
| auto* detached_context_dump = |
| process_memory_dump->CreateAllocatorDump(detached_context_name); |
| detached_context_dump->AddScalar( |
| "object_count", base::trace_event::MemoryAllocatorDump::kUnitsObjects, |
| number_of_detached_contexts); |
| } |
| |
| std::string IsolateTypeString(IsolateHolder::IsolateType isolate_type) { |
| switch (isolate_type) { |
| case IsolateHolder::IsolateType::kBlinkMainThread: |
| return "main"; |
| case IsolateHolder::IsolateType::kBlinkWorkerThread: |
| return "workers"; |
| case IsolateHolder::IsolateType::kTest: |
| LOG(FATAL) << "Unreachable code"; |
| return "test"; |
| case IsolateHolder::IsolateType::kUtility: |
| return "utility"; |
| } |
| LOG(FATAL) << "Unreachable code"; |
| } |
| |
| bool CanHaveMultipleIsolates(IsolateHolder::IsolateType isolate_type) { |
| switch (isolate_type) { |
| case IsolateHolder::IsolateType::kBlinkMainThread: |
| return false; |
| case IsolateHolder::IsolateType::kBlinkWorkerThread: |
| return true; |
| case IsolateHolder::IsolateType::kTest: |
| LOG(FATAL) << "Unreachable code"; |
| return false; |
| case IsolateHolder::IsolateType::kUtility: |
| // PDFium and ProxyResolver create one isolate per process. |
| return false; |
| } |
| LOG(FATAL) << "Unreachable code"; |
| } |
| |
| } // namespace anonymous |
| |
| void V8IsolateMemoryDumpProvider::DumpHeapStatistics( |
| const base::trace_event::MemoryDumpArgs& args, |
| base::trace_event::ProcessMemoryDump* process_memory_dump) { |
| std::string isolate_name = base::StringPrintf( |
| "isolate_0x%" PRIXPTR, |
| reinterpret_cast<uintptr_t>(isolate_holder_->isolate())); |
| |
| // Dump statistics of the heap's spaces. |
| v8::HeapStatistics heap_statistics; |
| isolate_holder_->isolate()->GetHeapStatistics(&heap_statistics); |
| |
| IsolateHolder::IsolateType isolate_type = isolate_holder_->isolate_type(); |
| std::string dump_base_name = "v8/" + IsolateTypeString(isolate_type); |
| std::string dump_name_suffix = |
| CanHaveMultipleIsolates(isolate_type) ? "/" + isolate_name : ""; |
| |
| std::string space_name_prefix = dump_base_name + "/heap"; |
| |
| size_t known_spaces_used_size = 0; |
| size_t known_spaces_size = 0; |
| size_t known_spaces_physical_size = 0; |
| size_t number_of_spaces = isolate_holder_->isolate()->NumberOfHeapSpaces(); |
| for (size_t space = 0; space < number_of_spaces; space++) { |
| v8::HeapSpaceStatistics space_statistics; |
| isolate_holder_->isolate()->GetHeapSpaceStatistics(&space_statistics, |
| space); |
| const size_t space_size = space_statistics.space_size(); |
| const size_t space_used_size = space_statistics.space_used_size(); |
| const size_t space_physical_size = space_statistics.physical_space_size(); |
| |
| known_spaces_size += space_size; |
| known_spaces_used_size += space_used_size; |
| known_spaces_physical_size += space_physical_size; |
| |
| std::string space_dump_name = dump_base_name + "/heap/" + |
| space_statistics.space_name() + |
| dump_name_suffix; |
| |
| auto* space_dump = |
| process_memory_dump->CreateAllocatorDump(space_dump_name); |
| space_dump->AddScalar(base::trace_event::MemoryAllocatorDump::kNameSize, |
| base::trace_event::MemoryAllocatorDump::kUnitsBytes, |
| space_physical_size); |
| space_dump->AddScalar("virtual_size", |
| base::trace_event::MemoryAllocatorDump::kUnitsBytes, |
| space_size); |
| |
| space_dump->AddScalar("allocated_objects_size", |
| base::trace_event::MemoryAllocatorDump::kUnitsBytes, |
| space_used_size); |
| } |
| |
| // Sanity checks. |
| DCHECK_EQ(heap_statistics.total_physical_size(), known_spaces_physical_size); |
| DCHECK_EQ(heap_statistics.used_heap_size(), known_spaces_used_size); |
| DCHECK_EQ(heap_statistics.total_heap_size(), known_spaces_size); |
| |
| // If V8 zaps garbage, all the memory mapped regions become resident, |
| // so we add an extra dump to avoid mismatches w.r.t. the total |
| // resident values. |
| if (heap_statistics.does_zap_garbage()) { |
| auto* zap_dump = process_memory_dump->CreateAllocatorDump( |
| dump_base_name + "/zapped_for_debug" + dump_name_suffix); |
| zap_dump->AddScalar(base::trace_event::MemoryAllocatorDump::kNameSize, |
| base::trace_event::MemoryAllocatorDump::kUnitsBytes, |
| heap_statistics.total_heap_size() - |
| heap_statistics.total_physical_size()); |
| } |
| |
| // Dump statistics about malloced memory. |
| std::string malloc_name = dump_base_name + "/malloc" + dump_name_suffix; |
| auto* malloc_dump = process_memory_dump->CreateAllocatorDump(malloc_name); |
| malloc_dump->AddScalar(base::trace_event::MemoryAllocatorDump::kNameSize, |
| base::trace_event::MemoryAllocatorDump::kUnitsBytes, |
| heap_statistics.malloced_memory()); |
| malloc_dump->AddScalar("peak_size", |
| base::trace_event::MemoryAllocatorDump::kUnitsBytes, |
| heap_statistics.peak_malloced_memory()); |
| const char* system_allocator_name = |
| base::trace_event::MemoryDumpManager::GetInstance() |
| ->system_allocator_pool_name(); |
| if (system_allocator_name) { |
| process_memory_dump->AddSuballocation(malloc_dump->guid(), |
| system_allocator_name); |
| } |
| |
| DumpContextStatistics(process_memory_dump, dump_base_name, dump_name_suffix, |
| heap_statistics.number_of_detached_contexts(), |
| heap_statistics.number_of_native_contexts()); |
| |
| auto* code_stats_dump = process_memory_dump->CreateAllocatorDump( |
| dump_base_name + "/code_stats" + dump_name_suffix); |
| |
| // Dump statistics related to code and bytecode if requested. |
| DumpCodeStatistics(code_stats_dump, isolate_holder_); |
| |
| // Dump object statistics only for detailed dumps. |
| if (args.level_of_detail != |
| base::trace_event::MemoryDumpLevelOfDetail::DETAILED) { |
| return; |
| } |
| |
| // Dump statistics of the heap's live objects from last GC. |
| // TODO(primiano): these should not be tracked in the same trace event as they |
| // report stats for the last GC (not the current state). See crbug.com/498779. |
| std::string object_name_prefix = |
| dump_base_name + "/heap_objects_at_last_gc" + dump_name_suffix; |
| bool did_dump_object_stats = false; |
| const size_t object_types = |
| isolate_holder_->isolate()->NumberOfTrackedHeapObjectTypes(); |
| for (size_t type_index = 0; type_index < object_types; type_index++) { |
| v8::HeapObjectStatistics object_statistics; |
| if (!isolate_holder_->isolate()->GetHeapObjectStatisticsAtLastGC( |
| &object_statistics, type_index)) |
| continue; |
| |
| std::string dump_name = |
| object_name_prefix + "/" + object_statistics.object_type(); |
| if (object_statistics.object_sub_type()[0] != '\0') |
| dump_name += std::string("/") + object_statistics.object_sub_type(); |
| auto* object_dump = process_memory_dump->CreateAllocatorDump(dump_name); |
| |
| object_dump->AddScalar( |
| base::trace_event::MemoryAllocatorDump::kNameObjectCount, |
| base::trace_event::MemoryAllocatorDump::kUnitsObjects, |
| object_statistics.object_count()); |
| object_dump->AddScalar(base::trace_event::MemoryAllocatorDump::kNameSize, |
| base::trace_event::MemoryAllocatorDump::kUnitsBytes, |
| object_statistics.object_size()); |
| did_dump_object_stats = true; |
| } |
| |
| if (process_memory_dump->GetAllocatorDump(object_name_prefix + |
| "/CODE_TYPE")) { |
| auto* code_kind_dump = process_memory_dump->CreateAllocatorDump( |
| object_name_prefix + "/CODE_TYPE/CODE_KIND"); |
| auto* code_age_dump = process_memory_dump->CreateAllocatorDump( |
| object_name_prefix + "/CODE_TYPE/CODE_AGE"); |
| process_memory_dump->AddOwnershipEdge(code_kind_dump->guid(), |
| code_age_dump->guid()); |
| } |
| |
| if (did_dump_object_stats) { |
| process_memory_dump->AddOwnershipEdge( |
| process_memory_dump->CreateAllocatorDump(object_name_prefix)->guid(), |
| process_memory_dump->GetOrCreateAllocatorDump(space_name_prefix) |
| ->guid()); |
| } |
| } |
| |
| } // namespace gin |
