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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.
#include "chrome/browser/utility_process_host.h"
#include "base/command_line.h"
#include "base/file_util.h"
#include "base/message_loop.h"
#include "base/path_service.h"
#include "base/process_util.h"
#include "base/string_util.h"
#include "base/task.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/render_messages.h"
#include "ipc/ipc_switches.h"
#if defined(OS_WIN)
#include "chrome/browser/sandbox_policy.h"
#elif defined(OS_POSIX)
#include "base/global_descriptors_posix.h"
#include "ipc/ipc_descriptors.h"
#endif
UtilityProcessHost::UtilityProcessHost(ResourceDispatcherHost* rdh,
Client* client,
MessageLoop* client_loop)
: ChildProcessHost(UTILITY_PROCESS, rdh),
client_(client),
client_loop_(client_loop) {
}
UtilityProcessHost::~UtilityProcessHost() {
}
bool UtilityProcessHost::StartExtensionUnpacker(const FilePath& extension) {
// Grant the subprocess access to the entire subdir the extension file is
// in, so that it can unpack to that dir.
if (!StartProcess(extension.DirName()))
return false;
Send(new UtilityMsg_UnpackExtension(extension));
return true;
}
bool UtilityProcessHost::StartWebResourceUnpacker(const std::string& data) {
if (!StartProcess(FilePath()))
return false;
Send(new UtilityMsg_UnpackWebResource(data));
return true;
}
std::wstring UtilityProcessHost::GetUtilityProcessCmd() {
return GetChildPath();
}
bool UtilityProcessHost::StartProcess(const FilePath& exposed_dir) {
// Name must be set or metrics_service will crash in any test which
// launches a UtilityProcessHost.
set_name(L"utility process");
if (!CreateChannel())
return false;
std::wstring exe_path = GetUtilityProcessCmd();
if (exe_path.empty()) {
NOTREACHED() << "Unable to get utility process binary name.";
return false;
}
CommandLine cmd_line(exe_path);
cmd_line.AppendSwitchWithValue(switches::kProcessType,
switches::kUtilityProcess);
cmd_line.AppendSwitchWithValue(switches::kProcessChannelID,
ASCIIToWide(channel_id()));
base::ProcessHandle process;
#if defined(OS_WIN)
if (!UseSandbox()) {
// Don't use the sandbox during unit tests.
base::LaunchApp(cmd_line, false, false, &process);
} else if (exposed_dir.empty()) {
process = sandbox::StartProcess(&cmd_line);
} else {
process = sandbox::StartProcessWithAccess(&cmd_line, exposed_dir);
}
#else
// TODO(port): Sandbox this on Linux/Mac. Also, zygote this to work with
// Linux updating.
const CommandLine& browser_command_line = *CommandLine::ForCurrentProcess();
bool has_cmd_prefix = browser_command_line.HasSwitch(
switches::kUtilityCmdPrefix);
if (has_cmd_prefix) {
// launch the utility child process with some prefix (usually "xterm -e gdb
// --args").
cmd_line.PrependWrapper(browser_command_line.GetSwitchValue(
switches::kUtilityCmdPrefix));
}
// This code is duplicated with browser_render_process_host.cc and
// plugin_process_host.cc, but there's not a good place to de-duplicate it.
// Maybe we can merge this into sandbox::StartProcess which will set up
// everything before calling LaunchApp?
base::file_handle_mapping_vector fds_to_map;
const int ipcfd = channel().GetClientFileDescriptor();
if (ipcfd > -1)
fds_to_map.push_back(std::pair<int, int>(
ipcfd, kPrimaryIPCChannel + base::GlobalDescriptors::kBaseDescriptor));
base::LaunchApp(cmd_line.argv(), fds_to_map, false, &process);
#endif
if (!process)
return false;
SetHandle(process);
return true;
}
void UtilityProcessHost::OnMessageReceived(const IPC::Message& message) {
client_loop_->PostTask(FROM_HERE,
NewRunnableMethod(client_.get(), &Client::OnMessageReceived, message));
}
void UtilityProcessHost::OnChannelError() {
bool child_exited;
bool did_crash = base::DidProcessCrash(&child_exited, handle());
if (did_crash) {
client_loop_->PostTask(FROM_HERE,
NewRunnableMethod(client_.get(), &Client::OnProcessCrashed));
}
}
void UtilityProcessHost::Client::OnMessageReceived(
const IPC::Message& message) {
IPC_BEGIN_MESSAGE_MAP(UtilityProcessHost, message)
IPC_MESSAGE_HANDLER(UtilityHostMsg_UnpackExtension_Succeeded,
Client::OnUnpackExtensionSucceeded)
IPC_MESSAGE_HANDLER(UtilityHostMsg_UnpackExtension_Failed,
Client::OnUnpackExtensionFailed)
IPC_MESSAGE_HANDLER(UtilityHostMsg_UnpackWebResource_Succeeded,
Client::OnUnpackWebResourceSucceeded)
IPC_MESSAGE_HANDLER(UtilityHostMsg_UnpackWebResource_Failed,
Client::OnUnpackWebResourceFailed)
IPC_END_MESSAGE_MAP_EX()
}
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