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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 CONTENT_BROWSER_ZYGOTE_HOST_IMPL_LINUX_H_
#define CONTENT_BROWSER_ZYGOTE_HOST_IMPL_LINUX_H_
#pragma once
#include <string>
#include <vector>
#include "base/global_descriptors_posix.h"
#include "base/process_util.h"
#include "base/synchronization/lock.h"
#include "content/public/browser/zygote_host_linux.h"
template<typename Type>
struct DefaultSingletonTraits;
static const char kZygoteMagic[] = "ZYGOTE_OK";
class CONTENT_EXPORT ZygoteHostImpl : public content::ZygoteHost {
public:
// Returns the singleton instance.
static ZygoteHostImpl* GetInstance();
void Init(const std::string& sandbox_cmd);
// Tries to start a process of type indicated by process_type.
// Returns its pid on success, otherwise
// base::kNullProcessHandle;
pid_t ForkRequest(const std::vector<std::string>& command_line,
const base::GlobalDescriptors::Mapping& mapping,
const std::string& process_type);
void EnsureProcessTerminated(pid_t process);
// Get the termination status (and, optionally, the exit code) of
// the process. |exit_code| is set to the exit code of the child
// process. (|exit_code| may be NULL.)
base::TerminationStatus GetTerminationStatus(base::ProcessHandle handle,
int* exit_code);
// These are the command codes used on the wire between the browser and the
// zygote.
enum {
kCmdFork = 0, // Fork off a new renderer.
kCmdReap = 1, // Reap a renderer child.
kCmdGetTerminationStatus = 2, // Check what happend to a child process.
kCmdGetSandboxStatus = 3, // Read a bitmask of kSandbox*
};
// ZygoteHost implementation:
virtual pid_t GetPid() const OVERRIDE;
virtual pid_t GetSandboxHelperPid() const OVERRIDE;
virtual int GetSandboxStatus() const OVERRIDE;
virtual void AdjustRendererOOMScore(base::ProcessHandle process_handle,
int score) OVERRIDE;
private:
friend struct DefaultSingletonTraits<ZygoteHostImpl>;
ZygoteHostImpl();
virtual ~ZygoteHostImpl();
ssize_t ReadReply(void* buf, size_t buflen);
int control_fd_; // the socket to the zygote
// A lock protecting all communication with the zygote. This lock must be
// acquired before sending a command and released after the result has been
// received.
base::Lock control_lock_;
pid_t pid_;
bool init_;
bool using_suid_sandbox_;
std::string sandbox_binary_;
bool have_read_sandbox_status_word_;
int sandbox_status_;
};
#endif // CONTENT_BROWSER_ZYGOTE_HOST_IMPL_LINUX_H_
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