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// Copyright (c) 2009 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_
#include <string>
#include "base/singleton.h"
#include "base/message_loop.h"
// 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();
protected:
CrashHandlerHostLinux();
~CrashHandlerHostLinux();
// This is here on purpose to make CrashHandlerHostLinux abstract.
virtual void SetProcessType() = 0;
std::string process_type_;
private:
void Init();
int process_socket_;
int browser_socket_;
MessageLoopForIO::FileDescriptorWatcher file_descriptor_watcher_;
DISALLOW_COPY_AND_ASSIGN(CrashHandlerHostLinux);
};
class PluginCrashHandlerHostLinux : public CrashHandlerHostLinux {
private:
friend struct DefaultSingletonTraits<PluginCrashHandlerHostLinux>;
PluginCrashHandlerHostLinux() {
SetProcessType();
}
~PluginCrashHandlerHostLinux() {}
virtual void SetProcessType() {
process_type_ = "plugin";
}
DISALLOW_COPY_AND_ASSIGN(PluginCrashHandlerHostLinux);
};
class RendererCrashHandlerHostLinux : public CrashHandlerHostLinux {
private:
friend struct DefaultSingletonTraits<RendererCrashHandlerHostLinux>;
RendererCrashHandlerHostLinux() {
SetProcessType();
}
~RendererCrashHandlerHostLinux() {}
virtual void SetProcessType() {
process_type_ = "renderer";
}
DISALLOW_COPY_AND_ASSIGN(RendererCrashHandlerHostLinux);
};
#endif // CHROME_BROWSER_CRASH_HANDLER_HOST_LINUX_H_
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