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// Copyright 2013 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.
#ifndef COMPONENTS_CRASH_CONTENT_BROWSER_CRASH_DUMP_MANAGER_ANDROID_H_
#define COMPONENTS_CRASH_CONTENT_BROWSER_CRASH_DUMP_MANAGER_ANDROID_H_
#include <map>
#include "base/files/file.h"
#include "base/files/file_path.h"
#include "base/process/process.h"
#include "base/synchronization/lock.h"
#include "content/public/browser/browser_child_process_observer.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
namespace content {
class RenderProcessHost;
}
namespace breakpad {
// This class manages the crash minidumps.
// On Android, because of process isolation, each renderer process runs with a
// different UID. As a result, we cannot generate the minidumps in the browser
// (as the browser process does not have access to some system files for the
// crashed process). So the minidump is generated in the renderer process.
// Since the isolated process cannot open files, we provide it on creation with
// a file descriptor where to write the minidump in the event of a crash.
// This class creates these file descriptors and associates them with render
// processes and take the appropriate action when the render process terminates.
class CrashDumpManager : public content::BrowserChildProcessObserver,
public content::NotificationObserver {
public:
// The embedder should create a single instance of the CrashDumpManager.
static CrashDumpManager* GetInstance();
// Should be created on the UI thread.
explicit CrashDumpManager(const base::FilePath& crash_dump_dir);
~CrashDumpManager() override;
// Returns a file that should be used to generate a minidump for the process
// |child_process_id|.
base::File CreateMinidumpFile(int child_process_id);
private:
typedef std::map<int, base::FilePath> ChildProcessIDToMinidumpPath;
static void ProcessMinidump(const base::FilePath& minidump_path,
base::ProcessHandle pid);
// content::BrowserChildProcessObserver implementation:
void BrowserChildProcessHostDisconnected(
const content::ChildProcessData& data) override;
void BrowserChildProcessCrashed(
const content::ChildProcessData& data,
int exit_code) override;
// NotificationObserver implementation:
void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) override;
// Called on child process exit (including crash).
void OnChildExit(int child_process_id, base::ProcessHandle pid);
content::NotificationRegistrar notification_registrar_;
// This map should only be accessed with its lock aquired as it is accessed
// from the PROCESS_LAUNCHER and UI threads.
base::Lock child_process_id_to_minidump_path_lock_;
ChildProcessIDToMinidumpPath child_process_id_to_minidump_path_;
base::FilePath crash_dump_dir_;
static CrashDumpManager* instance_;
DISALLOW_COPY_AND_ASSIGN(CrashDumpManager);
};
} // namespace breakpad
#endif // COMPONENTS_CRASH_CONTENT_BROWSER_CRASH_DUMP_MANAGER_ANDROID_H_
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