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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "gin/v8_shared_memory_dump_provider.h"
#include <string>
#include "base/memory/singleton.h"
#include "base/task/single_thread_task_runner.h"
#include "base/trace_event/memory_dump_manager.h"
#include "base/trace_event/process_memory_dump.h"
#include "v8/include/v8-initialization.h"
#include "v8/include/v8-isolate.h"
namespace gin {
V8SharedMemoryDumpProvider::V8SharedMemoryDumpProvider() {
base::trace_event::MemoryDumpManager::GetInstance()->RegisterDumpProvider(
this, "V8SharedMemory", nullptr);
}
// static
void V8SharedMemoryDumpProvider::Register() {
// The provider is registered as part of the constructor, so all this does is
// access the singleton causing it to be constructed on the first access.
base::Singleton<
V8SharedMemoryDumpProvider,
base::LeakySingletonTraits<V8SharedMemoryDumpProvider>>::get();
}
// Called at trace dump point time. Creates a snapshot with the memory counters
// for the current isolate.
bool V8SharedMemoryDumpProvider::OnMemoryDump(
const base::trace_event::MemoryDumpArgs& args,
base::trace_event::ProcessMemoryDump* process_memory_dump) {
v8::SharedMemoryStatistics shared_memory_statistics;
v8::V8::GetSharedMemoryStatistics(&shared_memory_statistics);
std::string dump_base_name = "v8/shared";
auto* shared_memory_dump = process_memory_dump->CreateAllocatorDump(
dump_base_name + "/read_only_space");
shared_memory_dump->AddScalar(
base::trace_event::MemoryAllocatorDump::kNameSize,
base::trace_event::MemoryAllocatorDump::kUnitsBytes,
shared_memory_statistics.read_only_space_physical_size());
shared_memory_dump->AddScalar(
"allocated_objects_size",
base::trace_event::MemoryAllocatorDump::kUnitsBytes,
shared_memory_statistics.read_only_space_used_size());
shared_memory_dump->AddScalar(
"virtual_size", base::trace_event::MemoryAllocatorDump::kUnitsBytes,
shared_memory_statistics.read_only_space_size());
return true;
}
} // namespace gin
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