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// 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.
// This file defines the types and structs used to issue memory dump requests.
// These are also used in the IPCs for coordinating inter-process memory dumps.
#include <stdint.h>
#include <string>
#include "base/base_export.h"
#include "base/callback.h"
namespace base {
namespace trace_event {
// Captures the reason why a memory dump is being requested. This is to allow
// selective enabling of dumps, filtering and post-processing.
enum class MemoryDumpType {
TASK_BEGIN, // Dumping memory at the beginning of a message-loop task.
TASK_END, // Dumping memory at the ending of a message-loop task.
PERIODIC_INTERVAL, // Dumping memory at periodic intervals.
EXPLICITLY_TRIGGERED, // Non maskable dump request.
// Tells the MemoryDumpProvider(s) how much detailed their dumps should be.
enum class MemoryDumpLevelOfDetail {
// For background tracing mode. The dump time is quick, and typically just the
// totals are expected. Suballocations need not be specified. Dump name must
// contain only pre-defined strings and string arguments cannot be added.
// For the levels below, MemoryDumpProvider instances must guarantee that the
// total size reported in the root node is consistent. Only the granularity of
// the child MemoryAllocatorDump(s) differs with the levels.
// Few entries, typically a fixed number, per dump.
// Unrestricted amount of entries per dump.
// For IPC Macros.
// Initial request arguments for a global memory dump. (see
// MemoryDumpManager::RequestGlobalMemoryDump()).
struct BASE_EXPORT MemoryDumpRequestArgs {
// Globally unique identifier. In multi-process dumps, all processes issue a
// local dump with the same guid. This allows the trace importers to
// reconstruct the global dump.
uint64_t dump_guid;
MemoryDumpType dump_type;
MemoryDumpLevelOfDetail level_of_detail;
// Args for ProcessMemoryDump and passed to OnMemoryDump calls for memory dump
// providers. Dump providers are expected to read the args for creating dumps.
struct MemoryDumpArgs {
// Specifies how detailed the dumps should be.
MemoryDumpLevelOfDetail level_of_detail;
using MemoryDumpCallback = Callback<void(uint64_t dump_guid, bool success)>;
BASE_EXPORT const char* MemoryDumpTypeToString(const MemoryDumpType& dump_type);
BASE_EXPORT const char* MemoryDumpLevelOfDetailToString(
const MemoryDumpLevelOfDetail& level_of_detail);
BASE_EXPORT MemoryDumpLevelOfDetail
StringToMemoryDumpLevelOfDetail(const std::string& str);
} // namespace trace_event
} // namespace base