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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/browser/plugin_loader_posix.h"
#include "base/bind.h"
#include "base/message_loop/message_loop.h"
#include "base/message_loop/message_loop_proxy.h"
#include "base/metrics/histogram.h"
#include "content/browser/utility_process_host_impl.h"
#include "content/common/child_process_host_impl.h"
#include "content/common/plugin_list.h"
#include "content/common/utility_messages.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/plugin_service.h"
namespace content {
PluginLoaderPosix::PluginLoaderPosix()
: next_load_index_(0) {
}
void PluginLoaderPosix::LoadPlugins(
scoped_refptr<base::MessageLoopProxy> target_loop,
const PluginService::GetPluginsCallback& callback) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
callbacks_.push_back(PendingCallback(target_loop, callback));
if (callbacks_.size() == 1) {
BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
base::Bind(&PluginLoaderPosix::GetPluginsToLoad, this));
}
}
bool PluginLoaderPosix::OnMessageReceived(const IPC::Message& message) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(PluginLoaderPosix, message)
IPC_MESSAGE_HANDLER(UtilityHostMsg_LoadedPlugin, OnPluginLoaded)
IPC_MESSAGE_HANDLER(UtilityHostMsg_LoadPluginFailed, OnPluginLoadFailed)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
void PluginLoaderPosix::OnProcessCrashed(int exit_code) {
if (next_load_index_ == canonical_list_.size()) {
// How this case occurs is unknown. See crbug.com/111935.
canonical_list_.clear();
} else {
canonical_list_.erase(canonical_list_.begin(),
canonical_list_.begin() + next_load_index_ + 1);
}
next_load_index_ = 0;
LoadPluginsInternal();
}
bool PluginLoaderPosix::Send(IPC::Message* message) {
if (process_host_.get())
return process_host_->Send(message);
return false;
}
PluginLoaderPosix::~PluginLoaderPosix() {
}
void PluginLoaderPosix::GetPluginsToLoad() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
base::TimeTicks start_time(base::TimeTicks::Now());
loaded_plugins_.clear();
next_load_index_ = 0;
canonical_list_.clear();
PluginList::Singleton()->GetPluginPathsToLoad(
&canonical_list_,
PluginService::GetInstance()->NPAPIPluginsSupported());
internal_plugins_.clear();
PluginList::Singleton()->GetInternalPlugins(&internal_plugins_);
BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
base::Bind(&PluginLoaderPosix::LoadPluginsInternal,
make_scoped_refptr(this)));
HISTOGRAM_TIMES("PluginLoaderPosix.GetPluginList",
(base::TimeTicks::Now() - start_time) *
base::Time::kMicrosecondsPerMillisecond);
}
void PluginLoaderPosix::LoadPluginsInternal() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
// Check if the list is empty or all plugins have already been loaded before
// forking.
if (MaybeRunPendingCallbacks())
return;
if (load_start_time_.is_null())
load_start_time_ = base::TimeTicks::Now();
UtilityProcessHostImpl* host = new UtilityProcessHostImpl(
this,
BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO).get());
process_host_ = host->AsWeakPtr();
process_host_->DisableSandbox();
#if defined(OS_MACOSX)
host->set_child_flags(ChildProcessHost::CHILD_ALLOW_HEAP_EXECUTION);
#endif
process_host_->Send(new UtilityMsg_LoadPlugins(canonical_list_));
}
void PluginLoaderPosix::OnPluginLoaded(uint32 index,
const WebPluginInfo& plugin) {
if (index != next_load_index_) {
LOG(ERROR) << "Received unexpected plugin load message for "
<< plugin.path.value() << "; index=" << index;
return;
}
if (!MaybeAddInternalPlugin(plugin.path))
loaded_plugins_.push_back(plugin);
++next_load_index_;
MaybeRunPendingCallbacks();
}
void PluginLoaderPosix::OnPluginLoadFailed(uint32 index,
const base::FilePath& plugin_path) {
if (index != next_load_index_) {
LOG(ERROR) << "Received unexpected plugin load failure message for "
<< plugin_path.value() << "; index=" << index;
return;
}
++next_load_index_;
MaybeAddInternalPlugin(plugin_path);
MaybeRunPendingCallbacks();
}
bool PluginLoaderPosix::MaybeAddInternalPlugin(
const base::FilePath& plugin_path) {
for (std::vector<WebPluginInfo>::iterator it = internal_plugins_.begin();
it != internal_plugins_.end();
++it) {
if (it->path == plugin_path) {
loaded_plugins_.push_back(*it);
internal_plugins_.erase(it);
return true;
}
}
return false;
}
bool PluginLoaderPosix::MaybeRunPendingCallbacks() {
if (next_load_index_ < canonical_list_.size())
return false;
PluginList::Singleton()->SetPlugins(loaded_plugins_);
// Only call the first callback with loaded plugins because there may be
// some extra plugin paths added since the first callback is added.
if (!callbacks_.empty()) {
PendingCallback callback = callbacks_.front();
callbacks_.pop_front();
callback.target_loop->PostTask(
FROM_HERE,
base::Bind(callback.callback, loaded_plugins_));
}
HISTOGRAM_TIMES("PluginLoaderPosix.LoadDone",
(base::TimeTicks::Now() - load_start_time_)
* base::Time::kMicrosecondsPerMillisecond);
load_start_time_ = base::TimeTicks();
if (!callbacks_.empty()) {
BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
base::Bind(&PluginLoaderPosix::GetPluginsToLoad, this));
return false;
}
return true;
}
PluginLoaderPosix::PendingCallback::PendingCallback(
scoped_refptr<base::MessageLoopProxy> loop,
const PluginService::GetPluginsCallback& cb)
: target_loop(loop),
callback(cb) {
}
PluginLoaderPosix::PendingCallback::~PendingCallback() {
}
} // namespace content
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