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// Copyright (c) 2011 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 CHROME_BROWSER_CRASH_HANDLER_HOST_LINUX_H_
#define CHROME_BROWSER_CRASH_HANDLER_HOST_LINUX_H_
#pragma once
#include "base/message_loop.h"
#if defined(USE_LINUX_BREAKPAD)
#include <sys/types.h>
#include <string>
#include "base/scoped_ptr.h"
class BreakpadInfo;
namespace base {
class Thread;
}
#endif // defined(USE_LINUX_BREAKPAD)
template <typename T> struct DefaultSingletonTraits;
// This is the base class for singleton objects which crash dump renderers and
// plugins on Linux. We perform the crash dump from the browser because it
// allows us to be outside the sandbox.
//
// PluginCrashHandlerHostLinux and RendererCrashHandlerHostLinux are singletons
// that handle plugin and renderer crashes, respectively.
//
// Processes signal that they need to be dumped by sending a datagram over a
// UNIX domain socket. All processes of the same type share the client end of
// this socket which is installed in their descriptor table before exec.
class CrashHandlerHostLinux : public MessageLoopForIO::Watcher,
public MessageLoop::DestructionObserver {
public:
// Get the file descriptor which processes should be given in order to signal
// crashes to the browser.
int GetDeathSignalSocket() const {
return process_socket_;
}
// MessagePumbLibevent::Watcher impl:
virtual void OnFileCanWriteWithoutBlocking(int fd);
virtual void OnFileCanReadWithoutBlocking(int fd);
// MessageLoop::DestructionObserver impl:
virtual void WillDestroyCurrentMessageLoop();
#if defined(USE_LINUX_BREAKPAD)
// Whether we are shutting down or not.
bool IsShuttingDown() const;
#endif
protected:
CrashHandlerHostLinux();
virtual ~CrashHandlerHostLinux();
#if defined(USE_LINUX_BREAKPAD)
// Only called in concrete subclasses.
void InitCrashUploaderThread();
std::string process_type_;
#endif
private:
void Init();
#if defined(USE_LINUX_BREAKPAD)
// This is here on purpose to make CrashHandlerHostLinux abstract.
virtual void SetProcessType() = 0;
// Do work on the FILE thread for OnFileCanReadWithoutBlocking().
void WriteDumpFile(BreakpadInfo* info,
pid_t crashing_pid,
char* crash_context,
int signal_fd);
// Continue OnFileCanReadWithoutBlocking()'s work on the IO thread.
void QueueCrashDumpTask(BreakpadInfo* info, int signal_fd);
#endif
int process_socket_;
int browser_socket_;
#if defined(USE_LINUX_BREAKPAD)
MessageLoopForIO::FileDescriptorWatcher file_descriptor_watcher_;
scoped_ptr<base::Thread> uploader_thread_;
bool shutting_down_;
#endif
DISALLOW_COPY_AND_ASSIGN(CrashHandlerHostLinux);
};
class GpuCrashHandlerHostLinux : public CrashHandlerHostLinux {
public:
// Returns the singleton instance.
static GpuCrashHandlerHostLinux* GetInstance();
private:
friend struct DefaultSingletonTraits<GpuCrashHandlerHostLinux>;
GpuCrashHandlerHostLinux();
virtual ~GpuCrashHandlerHostLinux();
#if defined(USE_LINUX_BREAKPAD)
virtual void SetProcessType();
#endif
DISALLOW_COPY_AND_ASSIGN(GpuCrashHandlerHostLinux);
};
class PluginCrashHandlerHostLinux : public CrashHandlerHostLinux {
public:
// Returns the singleton instance.
static PluginCrashHandlerHostLinux* GetInstance();
private:
friend struct DefaultSingletonTraits<PluginCrashHandlerHostLinux>;
PluginCrashHandlerHostLinux();
virtual ~PluginCrashHandlerHostLinux();
#if defined(USE_LINUX_BREAKPAD)
virtual void SetProcessType();
#endif
DISALLOW_COPY_AND_ASSIGN(PluginCrashHandlerHostLinux);
};
class RendererCrashHandlerHostLinux : public CrashHandlerHostLinux {
public:
// Returns the singleton instance.
static RendererCrashHandlerHostLinux* GetInstance();
private:
friend struct DefaultSingletonTraits<RendererCrashHandlerHostLinux>;
RendererCrashHandlerHostLinux();
virtual ~RendererCrashHandlerHostLinux();
#if defined(USE_LINUX_BREAKPAD)
virtual void SetProcessType();
#endif
DISALLOW_COPY_AND_ASSIGN(RendererCrashHandlerHostLinux);
};
#endif // CHROME_BROWSER_CRASH_HANDLER_HOST_LINUX_H_
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