| // 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 "base/message_loop/message_loop.h" |
| #include "base/strings/stringprintf.h" |
| #include "base/thread_task_runner_handle.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 { |
| |
| namespace { |
| const char kRootDumpName[] = "v8"; |
| const char kIsolateDumpName[] = "isolate"; |
| const char kHeapSpacesDumpName[] = "heap_spaces"; |
| const char kAvailableSizeAttribute[] = "available_size_in_bytes"; |
| } // namespace |
| |
| V8IsolateMemoryDumpProvider::V8IsolateMemoryDumpProvider( |
| IsolateHolder* isolate_holder) |
| : isolate_holder_(isolate_holder) { |
| base::trace_event::MemoryDumpManager::GetInstance()->RegisterDumpProvider( |
| this, base::ThreadTaskRunnerHandle::Get()); |
| } |
| |
| 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( |
| base::trace_event::ProcessMemoryDump* pmd) { |
| if (isolate_holder_->access_mode() == IsolateHolder::kUseLocker) { |
| v8::Locker locked(isolate_holder_->isolate()); |
| DumpMemoryStatistics(pmd); |
| } else { |
| DumpMemoryStatistics(pmd); |
| } |
| return true; |
| } |
| |
| void V8IsolateMemoryDumpProvider::DumpMemoryStatistics( |
| base::trace_event::ProcessMemoryDump* pmd) { |
| v8::HeapStatistics heap_statistics; |
| isolate_holder_->isolate()->GetHeapStatistics(&heap_statistics); |
| |
| size_t known_spaces_used_size = 0; |
| size_t known_spaces_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(); |
| |
| known_spaces_size += space_size; |
| known_spaces_used_size += space_used_size; |
| |
| std::string allocator_name = |
| base::StringPrintf("%s/%s_%p/%s/%s", kRootDumpName, kIsolateDumpName, |
| isolate_holder_->isolate(), kHeapSpacesDumpName, |
| space_statistics.space_name()); |
| base::trace_event::MemoryAllocatorDump* space_dump = |
| pmd->CreateAllocatorDump(allocator_name); |
| space_dump->AddScalar( |
| base::trace_event::MemoryAllocatorDump::kNameOuterSize, |
| base::trace_event::MemoryAllocatorDump::kUnitsBytes, space_size); |
| |
| // TODO(ssid): Fix crbug.com/481504 to get the objects count of live objects |
| // after the last GC. |
| space_dump->AddScalar( |
| base::trace_event::MemoryAllocatorDump::kNameInnerSize, |
| base::trace_event::MemoryAllocatorDump::kUnitsBytes, space_used_size); |
| space_dump->AddScalar(kAvailableSizeAttribute, |
| base::trace_event::MemoryAllocatorDump::kUnitsBytes, |
| space_statistics.space_available_size()); |
| } |
| // Compute the rest of the memory, not accounted by the spaces above. |
| std::string allocator_name = base::StringPrintf( |
| "%s/%s_%p/%s/%s", kRootDumpName, kIsolateDumpName, |
| isolate_holder_->isolate(), kHeapSpacesDumpName, "other_spaces"); |
| base::trace_event::MemoryAllocatorDump* other_spaces_dump = |
| pmd->CreateAllocatorDump(allocator_name); |
| other_spaces_dump->AddScalar( |
| base::trace_event::MemoryAllocatorDump::kNameOuterSize, |
| base::trace_event::MemoryAllocatorDump::kUnitsBytes, |
| heap_statistics.total_heap_size() - known_spaces_size); |
| other_spaces_dump->AddScalar( |
| base::trace_event::MemoryAllocatorDump::kNameInnerSize, |
| base::trace_event::MemoryAllocatorDump::kUnitsBytes, |
| heap_statistics.used_heap_size() - known_spaces_used_size); |
| |
| // TODO(ssid): Fix crbug.com/481504 to get the total available size of the |
| // heap. |
| other_spaces_dump->AddScalar( |
| kAvailableSizeAttribute, |
| base::trace_event::MemoryAllocatorDump::kUnitsBytes, 0); |
| } |
| |
| } // namespace gin |