components/services/heap_profiling/connection_manager.h

// 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.

#ifndef COMPONENTS_SERVICES_HEAP_PROFILING_CONNECTION_MANAGER_H_
#define COMPONENTS_SERVICES_HEAP_PROFILING_CONNECTION_MANAGER_H_

#include <map>
#include <string>
#include <unordered_map>
#include <vector>

#include "base/containers/flat_map.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "base/synchronization/lock.h"
#include "base/threading/thread.h"
#include "base/timer/timer.h"
#include "build/build_config.h"
#include "components/services/heap_profiling/allocation.h"
#include "components/services/heap_profiling/public/mojom/heap_profiling_service.mojom.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
#include "services/resource_coordinator/public/mojom/memory_instrumentation/memory_instrumentation.mojom.h"

namespace heap_profiling {

struct ExportParams;

using VmRegions =
    base::flat_map<base::ProcessId,
                   std::vector<memory_instrumentation::mojom::VmRegionPtr>>;

// Manages all connections and logging for each process. Pipes are supplied by
// the pipe server and this class will connect them to a parser and logger.
//
// Note |backtrace_storage| must outlive ConnectionManager.
//
// This object is constructed on the UI thread, but the rest of the usage
// (including deletion) is on the IO thread.
class ConnectionManager {
  using AddressToStringMap = std::unordered_map<uint64_t, std::string>;
  using CompleteCallback = base::OnceClosure;
  using ContextMap = std::map<std::string, int>;
  using DumpProcessesForTracingCallback = memory_instrumentation::mojom::
      HeapProfiler::DumpProcessesForTracingCallback;

 public:
  ConnectionManager();

  ConnectionManager(const ConnectionManager&) = delete;
  ConnectionManager& operator=(const ConnectionManager&) = delete;

  ~ConnectionManager();

  // Dumping is asynchronous so will not be complete when this function
  // returns. The dump is complete when the callback provided in the args is
  // fired.
  void DumpProcessesForTracing(bool strip_path_from_mapped_files,
                               bool write_proto,
                               DumpProcessesForTracingCallback callback,
                               VmRegions vm_regions);