chromium/base/memory/shared_memory_tracker.cc

// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "base/memory/shared_memory_tracker.h"

#include "base/check.h"
#include "base/notreached.h"
#include "base/strings/string_number_conversions.h"
#include "base/trace_event/base_tracing.h"
#include "base/tracing_buildflags.h"

#if BUILDFLAG(ENABLE_BASE_TRACING)
#include <optional>

#include "base/trace_event/memory_dump_manager.h"  // no-presubmit-check
#include "base/trace_event/process_memory_dump.h"  // no-presubmit-check
#endif  // BUILDFLAG(ENABLE_BASE_TRACING)

namespace base {

const char SharedMemoryTracker::kDumpRootName[] = …;

// static
SharedMemoryTracker* SharedMemoryTracker::GetInstance() { … }

// static
std::string SharedMemoryTracker::GetDumpNameForTracing(
    const UnguessableToken& id) { … }

// static
trace_event::MemoryAllocatorDumpGuid
SharedMemoryTracker::GetGlobalDumpIdForTracing(const UnguessableToken& id) { … }

const trace_event::MemoryAllocatorDump*
SharedMemoryTracker::GetOrCreateSharedMemoryDump(
    const SharedMemoryMapping& shared_memory,
    trace_event::ProcessMemoryDump* pmd) { … }

void SharedMemoryTracker::IncrementMemoryUsage(
    const SharedMemoryMapping& mapping) { … }

void SharedMemoryTracker::DecrementMemoryUsage(
    const SharedMemoryMapping& mapping) { … }

SharedMemoryTracker::SharedMemoryTracker() { … }

SharedMemoryTracker::~SharedMemoryTracker() = default;

bool SharedMemoryTracker::OnMemoryDump(const trace_event::MemoryDumpArgs& args,
                                       trace_event::ProcessMemoryDump* pmd) { … }

// static
const trace_event::MemoryAllocatorDump*
SharedMemoryTracker::GetOrCreateSharedMemoryDumpInternal(
    void* mapped_memory,
    size_t mapped_size,
    const UnguessableToken& mapped_id,
    trace_event::ProcessMemoryDump* pmd) { … }

}  // namespace