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// Copyright 2014 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 "mojo/shell/child_process_host.h"
#include "base/base_switches.h"
#include "base/bind.h"
#include "base/command_line.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/macros.h"
#include "base/process/kill.h"
#include "base/process/launch.h"
#include "base/strings/string_number_conversions.h"
#include "base/task_runner.h"
#include "base/task_runner_util.h"
#include "mojo/shell/context.h"
#include "mojo/shell/switches.h"
namespace mojo {
namespace shell {
ChildProcessHost::ChildProcessHost(Context* context,
Delegate* delegate,
ChildProcess::Type type)
: context_(context),
delegate_(delegate),
type_(type),
child_process_handle_(base::kNullProcessHandle) {
DCHECK(delegate);
platform_channel_ = platform_channel_pair_.PassServerHandle();
CHECK(platform_channel_.is_valid());
}
ChildProcessHost::~ChildProcessHost() {
if (child_process_handle_ != base::kNullProcessHandle) {
LOG(WARNING) << "Destroying ChildProcessHost with unjoined child";
base::CloseProcessHandle(child_process_handle_);
child_process_handle_ = base::kNullProcessHandle;
}
}
void ChildProcessHost::Start() {
DCHECK_EQ(child_process_handle_, base::kNullProcessHandle);
delegate_->WillStart();
CHECK(base::PostTaskAndReplyWithResult(
context_->task_runners()->blocking_pool(),
FROM_HERE,
base::Bind(&ChildProcessHost::DoLaunch, base::Unretained(this)),
base::Bind(&ChildProcessHost::DidLaunch, base::Unretained(this))));
}
int ChildProcessHost::Join() {
DCHECK_NE(child_process_handle_, base::kNullProcessHandle);
int rv = -1;
LOG_IF(ERROR, !base::WaitForExitCode(child_process_handle_, &rv))
<< "Failed to wait for child process";
base::CloseProcessHandle(child_process_handle_);
child_process_handle_ = base::kNullProcessHandle;
return rv;
}
bool ChildProcessHost::DoLaunch() {
static const char* kForwardSwitches[] = {
switches::kTraceToConsole,
switches::kV,
switches::kVModule,
};
const CommandLine* parent_command_line = CommandLine::ForCurrentProcess();
CommandLine child_command_line(parent_command_line->GetProgram());
child_command_line.CopySwitchesFrom(*parent_command_line, kForwardSwitches,
arraysize(kForwardSwitches));
child_command_line.AppendSwitchASCII(
switches::kChildProcessType, base::IntToString(static_cast<int>(type_)));
embedder::HandlePassingInformation handle_passing_info;
platform_channel_pair_.PrepareToPassClientHandleToChildProcess(
&child_command_line, &handle_passing_info);
base::LaunchOptions options;
#if defined(OS_WIN)
options.start_hidden = true;
options.handles_to_inherit = &handle_passing_info;
#elif defined(OS_POSIX)
options.fds_to_remap = &handle_passing_info;
#endif
if (!base::LaunchProcess(child_command_line, options, &child_process_handle_))
return false;
platform_channel_pair_.ChildProcessLaunched();
return true;
}
void ChildProcessHost::DidLaunch(bool success) {
delegate_->DidStart(success);
}
} // namespace shell
} // namespace mojo
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