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// Copyright (c) 2012 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 "content/plugin/plugin_thread.h"
#include "build/build_config.h"
#if defined(TOOLKIT_GTK)
#include <gtk/gtk.h>
#elif defined(OS_MACOSX)
#include <CoreFoundation/CoreFoundation.h>
#endif
#include <string>
#include <vector>
#include "base/bind.h"
#include "base/command_line.h"
#include "base/lazy_instance.h"
#include "base/process/kill.h"
#include "base/process/process_handle.h"
#include "base/threading/thread_local.h"
#include "content/child/blink_platform_impl.h"
#include "content/child/child_process.h"
#include "content/child/npapi/npobject_util.h"
#include "content/child/npapi/plugin_lib.h"
#include "content/common/plugin_process_messages.h"
#include "content/public/common/content_switches.h"
#include "content/public/plugin/content_plugin_client.h"
#include "third_party/WebKit/public/web/WebKit.h"
#include "ipc/ipc_channel_handle.h"
#if defined(TOOLKIT_GTK)
#include "ui/gfx/gtk_util.h"
#endif
#if defined(USE_X11)
#include "ui/base/x/x11_util.h"
#endif
namespace content {
namespace {
class EnsureTerminateMessageFilter : public IPC::ChannelProxy::MessageFilter {
public:
EnsureTerminateMessageFilter() {}
protected:
virtual ~EnsureTerminateMessageFilter() {}
// IPC::ChannelProxy::MessageFilter:
virtual void OnChannelError() OVERRIDE {
// How long we wait before forcibly shutting down the process.
const base::TimeDelta kPluginProcessTerminateTimeout =
base::TimeDelta::FromSeconds(3);
// Ensure that we don't wait indefinitely for the plugin to shutdown.
// as the browser does not terminate plugin processes on shutdown.
// We achieve this by posting an exit process task on the IO thread.
base::MessageLoop::current()->PostDelayedTask(
FROM_HERE,
base::Bind(&EnsureTerminateMessageFilter::Terminate, this),
kPluginProcessTerminateTimeout);
}
private:
void Terminate() {
base::KillProcess(base::GetCurrentProcessHandle(), 0, false);
}
};
} // namespace
static base::LazyInstance<base::ThreadLocalPointer<PluginThread> > lazy_tls =
LAZY_INSTANCE_INITIALIZER;
PluginThread::PluginThread()
: preloaded_plugin_module_(NULL),
forcefully_terminate_plugin_process_(false) {
base::FilePath plugin_path =
CommandLine::ForCurrentProcess()->GetSwitchValuePath(
switches::kPluginPath);
lazy_tls.Pointer()->Set(this);
#if defined(TOOLKIT_GTK)
{
// XEmbed plugins assume they are hosted in a Gtk application, so we need
// to initialize Gtk in the plugin process.
// g_thread_init API is deprecated since glib 2.31.0, see release note:
// http://mail.gnome.org/archives/gnome-announce-list/2011-October/msg00041.html
#if !(GLIB_CHECK_VERSION(2, 31, 0))
g_thread_init(NULL);
#endif
// Flash has problems receiving clicks with newer GTKs due to the
// client-side windows change. To be safe, we just always set the
// backwards-compat environment variable.
setenv("GDK_NATIVE_WINDOWS", "1", 1);
gfx::GtkInitFromCommandLine(*CommandLine::ForCurrentProcess());
// GTK after 2.18 resets the environment variable. But if we're using
// nspluginwrapper, that means it'll spawn its subprocess without the
// environment variable! So set it again.
setenv("GDK_NATIVE_WINDOWS", "1", 1);
}
ui::SetDefaultX11ErrorHandlers();
#endif
PatchNPNFunctions();
// Preload the library to avoid loading, unloading then reloading
preloaded_plugin_module_ = base::LoadNativeLibrary(plugin_path, NULL);
scoped_refptr<PluginLib> plugin(PluginLib::CreatePluginLib(plugin_path));
if (plugin.get()) {
plugin->NP_Initialize();
// For OOP plugins the plugin dll will be unloaded during process shutdown
// time.
plugin->set_defer_unload(true);
}
GetContentClient()->plugin()->PluginProcessStarted(
plugin.get() ? plugin->plugin_info().name : base::string16());
channel()->AddFilter(new EnsureTerminateMessageFilter());
// This is needed because we call some code which uses WebKit strings.
webkit_platform_support_.reset(new BlinkPlatformImpl);
blink::initialize(webkit_platform_support_.get());
}
PluginThread::~PluginThread() {
}
void PluginThread::SetForcefullyTerminatePluginProcess() {
forcefully_terminate_plugin_process_ = true;
}
void PluginThread::Shutdown() {
ChildThread::Shutdown();
if (preloaded_plugin_module_) {
base::UnloadNativeLibrary(preloaded_plugin_module_);
preloaded_plugin_module_ = NULL;
}
NPChannelBase::CleanupChannels();
PluginLib::UnloadAllPlugins();
if (forcefully_terminate_plugin_process_)
base::KillProcess(base::GetCurrentProcessHandle(), 0, /* wait= */ false);
lazy_tls.Pointer()->Set(NULL);
}
PluginThread* PluginThread::current() {
return lazy_tls.Pointer()->Get();
}
bool PluginThread::OnControlMessageReceived(const IPC::Message& msg) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(PluginThread, msg)
IPC_MESSAGE_HANDLER(PluginProcessMsg_CreateChannel, OnCreateChannel)
IPC_MESSAGE_HANDLER(PluginProcessMsg_NotifyRenderersOfPendingShutdown,
OnNotifyRenderersOfPendingShutdown)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
void PluginThread::OnCreateChannel(int renderer_id,
bool incognito) {
scoped_refptr<PluginChannel> channel(PluginChannel::GetPluginChannel(
renderer_id, ChildProcess::current()->io_message_loop_proxy()));
IPC::ChannelHandle channel_handle;
if (channel.get()) {
channel_handle.name = channel->channel_handle().name;
#if defined(OS_POSIX)
// On POSIX, pass the renderer-side FD.
channel_handle.socket =
base::FileDescriptor(channel->TakeRendererFileDescriptor(), true);
#endif
channel->set_incognito(incognito);
}
Send(new PluginProcessHostMsg_ChannelCreated(channel_handle));
}
void PluginThread::OnNotifyRenderersOfPendingShutdown() {
PluginChannel::NotifyRenderersOfPendingShutdown();
}
} // namespace content
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