1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239
|
// 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"
#include "content/public/browser/user_metrics.h"
namespace content {
PluginLoaderPosix::PluginLoaderPosix()
: next_load_index_(0), loading_plugins_(false) {
}
void PluginLoaderPosix::GetPlugins(
const PluginService::GetPluginsCallback& callback) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
std::vector<WebPluginInfo> cached_plugins;
if (PluginList::Singleton()->GetPluginsNoRefresh(&cached_plugins)) {
// Can't assume the caller is reentrant.
base::MessageLoop::current()->PostTask(FROM_HERE,
base::Bind(callback, cached_plugins));
return;
}
if (!loading_plugins_) {
loading_plugins_ = true;
callbacks_.push_back(callback);
// When |loading_plugins_| is set to false, this instance must call
// SetPlugins().
PluginList::Singleton()->PrepareForPluginLoading();
BrowserThread::PostTask(BrowserThread::FILE,
FROM_HERE,
base::Bind(&PluginLoaderPosix::GetPluginsToLoad,
make_scoped_refptr(this)));
} else {
// If we are currently loading plugins, the plugin list might have been
// invalidated in the mean time, or might get invalidated before we finish.
// We'll wait until we have finished the current run, then try to get them
// again from the plugin list. If it has indeed been invalidated, it will
// restart plugin loading, otherwise it will immediately run the callback.
callbacks_.push_back(base::Bind(&PluginLoaderPosix::GetPluginsWrapper,
make_scoped_refptr(this), callback));
}
}
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) {
RecordAction(
base::UserMetricsAction("PluginLoaderPosix.UtilityProcessCrashed"));
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();
}
void PluginLoaderPosix::OnProcessLaunchFailed() {
FinishedLoadingPlugins();
}
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)));
LOCAL_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 (IsFinishedLoadingPlugins()) {
FinishedLoadingPlugins();
return;
}
RecordAction(
base::UserMetricsAction("PluginLoaderPosix.LaunchUtilityProcess"));
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
bool launched = LaunchUtilityProcess();
if (!launched) {
// The utility process either failed to start or failed to receive the IPC.
// This process will never receive any callbacks for OnPluginLoaded() or
// OnPluginLoadFailed().
FinishedLoadingPlugins();
}
}
void PluginLoaderPosix::GetPluginsWrapper(
const PluginService::GetPluginsCallback& callback,
const std::vector<WebPluginInfo>& plugins_unused) {
// We are being called after plugin loading has finished, but we don't know
// whether the plugin list has been invalidated in the mean time
// (and therefore |plugins| might already be stale). So we simply ignore it
// and call regular GetPlugins() instead.
GetPlugins(callback);
}
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;
}
auto it = FindInternalPlugin(plugin.path);
if (it != internal_plugins_.end()) {
loaded_plugins_.push_back(*it);
internal_plugins_.erase(it);
} else {
loaded_plugins_.push_back(plugin);
}
++next_load_index_;
if (IsFinishedLoadingPlugins())
FinishedLoadingPlugins();
}
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_;
auto it = FindInternalPlugin(plugin_path);
if (it != internal_plugins_.end()) {
loaded_plugins_.push_back(*it);
internal_plugins_.erase(it);
}
if (IsFinishedLoadingPlugins())
FinishedLoadingPlugins();
}
std::vector<WebPluginInfo>::iterator PluginLoaderPosix::FindInternalPlugin(
const base::FilePath& plugin_path) {
return std::find_if(internal_plugins_.begin(), internal_plugins_.end(),
[&plugin_path](const WebPluginInfo& plugin) {
return plugin.path == plugin_path;
});
}
bool PluginLoaderPosix::IsFinishedLoadingPlugins() {
if (canonical_list_.empty())
return true;
DCHECK(next_load_index_ <= canonical_list_.size());
return next_load_index_ == canonical_list_.size();
}
void PluginLoaderPosix::FinishedLoadingPlugins() {
loading_plugins_ = false;
PluginList::Singleton()->SetPlugins(loaded_plugins_);
for (auto& callback : callbacks_) {
base::MessageLoop::current()->PostTask(
FROM_HERE, base::Bind(callback, loaded_plugins_));
}
callbacks_.clear();
}
bool PluginLoaderPosix::LaunchUtilityProcess() {
return process_host_->Send(new UtilityMsg_LoadPlugins(canonical_list_));
}
} // namespace content
|