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// Copyright (c) 2010 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/browser_child_process_host.h"
#include "base/command_line.h"
#include "base/file_path.h"
#include "base/logging.h"
#include "base/metrics/histogram.h"
#include "base/path_service.h"
#include "base/process_util.h"
#include "base/singleton.h"
#include "base/stl_util-inl.h"
#include "base/string_util.h"
#include "chrome/app/breakpad_mac.h"
#include "chrome/browser/browser_thread.h"
#include "chrome/browser/prefs/pref_service.h"
#include "chrome/common/child_process_logging.h"
#include "chrome/common/chrome_constants.h"
#include "chrome/common/chrome_paths_internal.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/notification_service.h"
#include "chrome/common/plugin_messages.h"
#include "chrome/common/pref_names.h"
#include "chrome/common/process_watcher.h"
#include "chrome/common/result_codes.h"
#include "chrome/installer/util/google_update_settings.h"
#if defined(OS_LINUX)
#include "base/linux_util.h"
#endif // OS_LINUX
namespace {
typedef std::list<BrowserChildProcessHost*> ChildProcessList;
// The NotificationTask is used to notify about plugin process connection/
// disconnection. It is needed because the notifications in the
// NotificationService must happen in the main thread.
class ChildNotificationTask : public Task {
public:
ChildNotificationTask(
NotificationType notification_type, ChildProcessInfo* info)
: notification_type_(notification_type), info_(*info) { }
virtual void Run() {
NotificationService::current()->
Notify(notification_type_, NotificationService::AllSources(),
Details<ChildProcessInfo>(&info_));
}
private:
NotificationType notification_type_;
ChildProcessInfo info_;
};
} // namespace
BrowserChildProcessHost::BrowserChildProcessHost(
ProcessType type, ResourceDispatcherHost* resource_dispatcher_host)
: Receiver(type, -1),
ALLOW_THIS_IN_INITIALIZER_LIST(client_(this)),
resource_dispatcher_host_(resource_dispatcher_host) {
Singleton<ChildProcessList>::get()->push_back(this);
}
BrowserChildProcessHost::~BrowserChildProcessHost() {
Singleton<ChildProcessList>::get()->remove(this);
if (resource_dispatcher_host_)
resource_dispatcher_host_->CancelRequestsForProcess(id());
}
// static
void BrowserChildProcessHost::SetCrashReporterCommandLine(
CommandLine* command_line) {
#if defined(USE_LINUX_BREAKPAD)
if (IsCrashReporterEnabled()) {
command_line->AppendSwitchASCII(switches::kEnableCrashReporter,
child_process_logging::GetClientId() + "," + base::GetLinuxDistro());
}
#elif defined(OS_MACOSX)
if (IsCrashReporterEnabled()) {
command_line->AppendSwitchASCII(switches::kEnableCrashReporter,
child_process_logging::GetClientId());
}
#endif // OS_MACOSX
}
// static
void BrowserChildProcessHost::TerminateAll() {
// Make a copy since the ChildProcessHost dtor mutates the original list.
ChildProcessList copy = *(Singleton<ChildProcessList>::get());
STLDeleteElements(©);
}
void BrowserChildProcessHost::Launch(
#if defined(OS_WIN)
const FilePath& exposed_dir,
#elif defined(OS_POSIX)
bool use_zygote,
const base::environment_vector& environ,
#endif
CommandLine* cmd_line) {
child_process_.reset(new ChildProcessLauncher(
#if defined(OS_WIN)
exposed_dir,
#elif defined(OS_POSIX)
use_zygote,
environ,
channel()->GetClientFileDescriptor(),
#endif
cmd_line,
&client_));
}
bool BrowserChildProcessHost::Send(IPC::Message* msg) {
return SendOnChannel(msg);
}
void BrowserChildProcessHost::ForceShutdown() {
Singleton<ChildProcessList>::get()->remove(this);
ChildProcessHost::ForceShutdown();
}
void BrowserChildProcessHost::Notify(NotificationType type) {
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE, new ChildNotificationTask(type, this));
}
bool BrowserChildProcessHost::DidChildCrash() {
return child_process_->DidProcessCrash();
}
void BrowserChildProcessHost::OnChildDied() {
if (handle() != base::kNullProcessHandle) {
bool did_crash = DidChildCrash();
if (did_crash) {
OnProcessCrashed();
// Report that this child process crashed.
Notify(NotificationType::CHILD_PROCESS_CRASHED);
UMA_HISTOGRAM_COUNTS("ChildProcess.Crashes", this->type());
}
// Notify in the main loop of the disconnection.
Notify(NotificationType::CHILD_PROCESS_HOST_DISCONNECTED);
}
ChildProcessHost::OnChildDied();
}
bool BrowserChildProcessHost::InterceptMessageFromChild(
const IPC::Message& msg) {
bool msg_is_ok = true;
bool handled = false;
if (resource_dispatcher_host_) {
handled = resource_dispatcher_host_->OnMessageReceived(
msg, this, &msg_is_ok);
}
if (!handled && (msg.type() == PluginProcessHostMsg_ShutdownRequest::ID)) {
// Must remove the process from the list now, in case it gets used for a
// new instance before our watcher tells us that the process terminated.
Singleton<ChildProcessList>::get()->remove(this);
}
if (!msg_is_ok)
base::KillProcess(handle(), ResultCodes::KILLED_BAD_MESSAGE, false);
return handled;
}
BrowserChildProcessHost::ClientHook::ClientHook(BrowserChildProcessHost* host)
: host_(host) {
}
void BrowserChildProcessHost::ClientHook::OnProcessLaunched() {
if (!host_->child_process_->GetHandle()) {
host_->OnChildDied();
return;
}
host_->set_handle(host_->child_process_->GetHandle());
host_->OnProcessLaunched();
}
BrowserChildProcessHost::Iterator::Iterator()
: all_(true), type_(UNKNOWN_PROCESS) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO)) <<
"ChildProcessInfo::Iterator must be used on the IO thread.";
iterator_ = Singleton<ChildProcessList>::get()->begin();
}
BrowserChildProcessHost::Iterator::Iterator(ProcessType type)
: all_(false), type_(type) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO)) <<
"ChildProcessInfo::Iterator must be used on the IO thread.";
iterator_ = Singleton<ChildProcessList>::get()->begin();
if (!Done() && (*iterator_)->type() != type_)
++(*this);
}
BrowserChildProcessHost* BrowserChildProcessHost::Iterator::operator++() {
do {
++iterator_;
if (Done())
break;
if (!all_ && (*iterator_)->type() != type_)
continue;
return *iterator_;
} while (true);
return NULL;
}
bool BrowserChildProcessHost::Iterator::Done() {
return iterator_ == Singleton<ChildProcessList>::get()->end();
}
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