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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/gpu_process_host.h"
#include "base/command_line.h"
#include "base/singleton.h"
#include "base/thread.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/child_process_host.h"
#include "chrome/browser/child_process_launcher.h"
#include "chrome/browser/io_thread.h"
#include "chrome/browser/renderer_host/render_process_host.h"
#include "chrome/common/child_process_info.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/gpu_messages.h"
#include "chrome/common/render_messages.h"
#include "ipc/ipc_switches.h"
GpuProcessHost::GpuProcessHost() : last_routing_id_(1) {
const CommandLine& browser_command_line = *CommandLine::ForCurrentProcess();
std::wstring gpu_launcher =
browser_command_line.GetSwitchValue(switches::kGpuLauncher);
FilePath exe_path = ChildProcessHost::GetChildPath(gpu_launcher.empty());
if (exe_path.empty())
return;
std::string channel_id = ChildProcessInfo::GenerateRandomChannelID(this);
channel_.reset(new IPC::ChannelProxy(
channel_id,
IPC::Channel::MODE_SERVER,
this,
NULL, // No filter (for now).
g_browser_process->io_thread()->message_loop()));
CommandLine* cmd_line = new CommandLine(exe_path);
cmd_line->AppendSwitchWithValue(switches::kProcessType,
switches::kGpuProcess);
cmd_line->AppendSwitchWithValue(switches::kProcessChannelID,
ASCIIToWide(channel_id));
const CommandLine& browser_cmd_line = *CommandLine::ForCurrentProcess();
PropagateBrowserCommandLineToGpu(browser_cmd_line, cmd_line);
// If specified, prepend a launcher program to the command line.
if (!gpu_launcher.empty())
cmd_line->PrependWrapper(gpu_launcher);
// Spawn the child process asynchronously to avoid blocking the UI thread.
child_process_.reset(new ChildProcessLauncher(
#if defined(OS_WIN)
FilePath(),
#elif defined(POSIX)
false, // Never use the zygote (GPU plugin can't be sandboxed).
base::environment_vector(),
channel_->GetClientFileDescriptor(),
#endif
cmd_line,
this));
}
GpuProcessHost::~GpuProcessHost() {
while (!queued_synchronization_replies_.empty()) {
delete queued_synchronization_replies_.front();
queued_synchronization_replies_.pop();
}
}
// static
GpuProcessHost* GpuProcessHost::Get() {
GpuProcessHost* host = Singleton<GpuProcessHost>::get();
if (!host->child_process_.get())
return NULL; // Failed to init.
return host;
}
int32 GpuProcessHost::GetNextRoutingId() {
return ++last_routing_id_;
}
int32 GpuProcessHost::NewRenderWidgetHostView(GpuNativeWindowHandle parent) {
int32 routing_id = GetNextRoutingId();
Send(new GpuMsg_NewRenderWidgetHostView(parent, routing_id));
return routing_id;
}
bool GpuProcessHost::Send(IPC::Message* msg) {
if (!channel_.get()) {
delete msg;
return false;
}
if (child_process_.get() && child_process_->IsStarting()) {
queued_messages_.push(msg);
return true;
}
return channel_->Send(msg);
}
void GpuProcessHost::OnMessageReceived(const IPC::Message& message) {
if (message.routing_id() == MSG_ROUTING_CONTROL) {
OnControlMessageReceived(message);
} else {
router_.OnMessageReceived(message);
}
}
void GpuProcessHost::OnChannelConnected(int32 peer_pid) {
}
void GpuProcessHost::OnChannelError() {
}
void GpuProcessHost::OnProcessLaunched() {
while (!queued_messages_.empty()) {
Send(queued_messages_.front());
queued_messages_.pop();
}
}
void GpuProcessHost::AddRoute(int32 routing_id,
IPC::Channel::Listener* listener) {
router_.AddRoute(routing_id, listener);
}
void GpuProcessHost::RemoveRoute(int32 routing_id) {
router_.RemoveRoute(routing_id);
}
void GpuProcessHost::EstablishGpuChannel(int renderer_id) {
if (Send(new GpuMsg_EstablishChannel(renderer_id)))
sent_requests_.push(ChannelRequest(renderer_id));
else
ReplyToRenderer(renderer_id, IPC::ChannelHandle());
}
void GpuProcessHost::Synchronize(int renderer_id, IPC::Message* reply) {
// ************
// TODO(kbr): the handling of this synchronous message (which is
// needed for proper initialization semantics of APIs like WebGL) is
// currently broken on Windows because the renderer is sending a
// synchronous message to the browser's UI thread. To fix this, the
// GpuProcessHost needs to move to the IO thread, and any backing
// store handling needs to remain on the UI thread in a new
// GpuProcessHostProxy, where work is sent from the IO thread to the
// UI thread via PostTask.
// ************
queued_synchronization_replies_.push(reply);
CHECK(Send(new GpuMsg_Synchronize(renderer_id)));
}
void GpuProcessHost::OnControlMessageReceived(const IPC::Message& message) {
IPC_BEGIN_MESSAGE_MAP(GpuProcessHost, message)
IPC_MESSAGE_HANDLER(GpuHostMsg_ChannelEstablished, OnChannelEstablished)
IPC_MESSAGE_HANDLER(GpuHostMsg_SynchronizeReply, OnSynchronizeReply)
IPC_MESSAGE_UNHANDLED_ERROR()
IPC_END_MESSAGE_MAP()
}
void GpuProcessHost::OnChannelEstablished(
const IPC::ChannelHandle& channel_handle) {
const ChannelRequest& request = sent_requests_.front();
ReplyToRenderer(request.renderer_id, channel_handle);
sent_requests_.pop();
}
void GpuProcessHost::OnSynchronizeReply(int renderer_id) {
IPC::Message* reply = queued_synchronization_replies_.front();
queued_synchronization_replies_.pop();
RenderProcessHost* process_host = RenderProcessHost::FromID(renderer_id);
if (!process_host) {
delete reply;
return;
}
CHECK(process_host->Send(reply));
}
void GpuProcessHost::ReplyToRenderer(
int renderer_id,
const IPC::ChannelHandle& channel) {
// Check whether the renderer process is still around.
RenderProcessHost* process_host = RenderProcessHost::FromID(renderer_id);
if (!process_host)
return;
ViewMsg_GpuChannelEstablished* msg =
new ViewMsg_GpuChannelEstablished(channel);
// If the renderer process is performing synchronous initialization,
// it needs to handle this message before receiving the reply for
// the synchronous ViewHostMsg_SynchronizeGpu message.
msg->set_unblock(true);
CHECK(process_host->Send(msg));
}
void GpuProcessHost::PropagateBrowserCommandLineToGpu(
const CommandLine& browser_cmd,
CommandLine* gpu_cmd) const {
// Propagate the following switches to the GPU process command line (along
// with any associated values) if present in the browser command line.
static const char* const switch_names[] = {
switches::kDisableLogging,
switches::kEnableLogging,
switches::kGpuStartupDialog,
switches::kLoggingLevel,
};
for (size_t i = 0; i < arraysize(switch_names); ++i) {
if (browser_cmd.HasSwitch(switch_names[i])) {
gpu_cmd->AppendSwitchWithValue(switch_names[i],
browser_cmd.GetSwitchValueASCII(switch_names[i]));
}
}
}
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