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content / browser / plugin_service_impl.cc [blame]
// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/plugin_service_impl.h"
#include <stddef.h>
#include <string>
#include <string_view>
#include <utility>
#include "base/command_line.h"
#include "base/compiler_specific.h"
#include "base/files/file_path.h"
#include "base/functional/bind.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "base/synchronization/waitable_event.h"
#include "base/task/sequenced_task_runner.h"
#include "base/task/thread_pool.h"
#include "base/threading/thread.h"
#include "build/build_config.h"
#include "content/browser/child_process_security_policy_impl.h"
#include "content/browser/plugin_list.h"
#include "content/browser/process_lock.h"
#include "content/browser/renderer_host/render_process_host_impl.h"
#include "content/browser/renderer_host/render_view_host_impl.h"
#include "content/common/content_switches_internal.h"
#include "content/public/browser/browser_task_traits.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/content_browser_client.h"
#include "content/public/browser/plugin_service_filter.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/resource_context.h"
#include "content/public/browser/web_contents.h"
#include "content/public/common/content_client.h"
#include "content/public/common/content_constants.h"
#include "content/public/common/content_plugin_info.h"
#include "content/public/common/content_switches.h"
#include "content/public/common/process_type.h"
#include "content/public/common/webplugininfo.h"
#include "services/metrics/public/cpp/ukm_builders.h"
#if BUILDFLAG(ENABLE_PPAPI)
#include "content/browser/ppapi_plugin_process_host.h"
#include "content/common/pepper_plugin_list.h"
#include "ppapi/shared_impl/ppapi_permissions.h"
#endif // BUILDFLAG(ENABLE_PPAPI)
namespace content {
namespace {
#if BUILDFLAG(ENABLE_PPAPI)
int CountPpapiPluginProcessesForProfile(
const base::FilePath& plugin_path,
const base::FilePath& profile_data_directory) {
int count = 0;
for (PpapiPluginProcessHostIterator iter; !iter.Done(); ++iter) {
if (iter->plugin_path() == plugin_path &&
iter->profile_data_directory() == profile_data_directory) {
++count;
}
}
return count;
}
#endif // BUILDFLAG(ENABLE_PPAPI)
} // namespace
// static
PluginService* PluginService::GetInstance() {
return PluginServiceImpl::GetInstance();
}
void PluginService::PurgePluginListCache(BrowserContext* browser_context,
bool reload_pages) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
for (RenderProcessHost::iterator it = RenderProcessHost::AllHostsIterator();
!it.IsAtEnd(); it.Advance()) {
RenderProcessHost* host = it.GetCurrentValue();
if (!browser_context || host->GetBrowserContext() == browser_context)
host->GetRendererInterface()->PurgePluginListCache(reload_pages);
}
}
// static
PluginServiceImpl* PluginServiceImpl::GetInstance() {
return base::Singleton<PluginServiceImpl>::get();
}
PluginServiceImpl::PluginServiceImpl() = default;
PluginServiceImpl::~PluginServiceImpl() = default;
void PluginServiceImpl::Init() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
RegisterPlugins();
}
#if BUILDFLAG(ENABLE_PPAPI)
PpapiPluginProcessHost* PluginServiceImpl::FindPpapiPluginProcess(
const base::FilePath& plugin_path,
const base::FilePath& profile_data_directory,
const std::optional<url::Origin>& origin_lock) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
for (PpapiPluginProcessHostIterator iter; !iter.Done(); ++iter) {
if (iter->plugin_path() == plugin_path &&
iter->profile_data_directory() == profile_data_directory &&
(!iter->origin_lock() || iter->origin_lock() == origin_lock)) {
return *iter;
}
}
return nullptr;
}
PpapiPluginProcessHost* PluginServiceImpl::FindOrStartPpapiPluginProcess(
int render_process_id,
const base::FilePath& plugin_path,
const base::FilePath& profile_data_directory,
const std::optional<url::Origin>& origin_lock) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
if (filter_ && !filter_->CanLoadPlugin(render_process_id, plugin_path)) {
VLOG(1) << "Unable to load ppapi plugin: " << plugin_path.MaybeAsASCII();
return nullptr;
}
// Validate that the plugin is actually registered.
const ContentPluginInfo* info = GetRegisteredPluginInfo(plugin_path);
if (!info) {
VLOG(1) << "Unable to find ppapi plugin registration for: "
<< plugin_path.MaybeAsASCII();
return nullptr;
}
PpapiPluginProcessHost* plugin_host =
FindPpapiPluginProcess(plugin_path, profile_data_directory, origin_lock);
if (plugin_host)
return plugin_host;
// Avoid fork bomb.
if (origin_lock.has_value() && CountPpapiPluginProcessesForProfile(
plugin_path, profile_data_directory) >=
max_ppapi_processes_per_profile_) {
return nullptr;
}
// This plugin isn't loaded by any plugin process, so create a new process.
plugin_host = PpapiPluginProcessHost::CreatePluginHost(
*info, profile_data_directory, origin_lock);
if (!plugin_host) {
VLOG(1) << "Unable to create ppapi plugin process for: "
<< plugin_path.MaybeAsASCII();
}
return plugin_host;
}
void PluginServiceImpl::OpenChannelToPpapiPlugin(
int render_process_id,
const base::FilePath& plugin_path,
const base::FilePath& profile_data_directory,
const std::optional<url::Origin>& origin_lock,
PpapiPluginProcessHost::PluginClient* client) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
PpapiPluginProcessHost* plugin_host = FindOrStartPpapiPluginProcess(
render_process_id, plugin_path, profile_data_directory, origin_lock);
if (plugin_host) {
plugin_host->OpenChannelToPlugin(client);
} else {
// Send error.
client->OnPpapiChannelOpened(IPC::ChannelHandle(), base::kNullProcessId, 0);
}
}
#endif // BUILDFLAG(ENABLE_PPAPI)
bool PluginServiceImpl::GetPluginInfoArray(
const GURL& url,
const std::string& mime_type,
bool allow_wildcard,
std::vector<WebPluginInfo>* plugins,
std::vector<std::string>* actual_mime_types) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
return PluginList::Singleton()->GetPluginInfoArray(
url, mime_type, allow_wildcard, plugins, actual_mime_types);
}
bool PluginServiceImpl::GetPluginInfo(content::BrowserContext* browser_context,
const GURL& url,
const std::string& mime_type,
bool allow_wildcard,
bool* is_stale,
WebPluginInfo* info,
std::string* actual_mime_type) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
std::vector<WebPluginInfo> plugins;
std::vector<std::string> mime_types;
bool stale =
GetPluginInfoArray(url, mime_type, allow_wildcard, &plugins, &mime_types);
if (is_stale)
*is_stale = stale;
for (size_t i = 0; i < plugins.size(); ++i) {
if (!filter_ || filter_->IsPluginAvailable(browser_context, plugins[i])) {
*info = plugins[i];
if (actual_mime_type)
*actual_mime_type = mime_types[i];
return true;
}
}
return false;
}
bool PluginServiceImpl::GetPluginInfoByPath(const base::FilePath& plugin_path,
WebPluginInfo* info) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
std::vector<WebPluginInfo> plugins;
PluginList::Singleton()->GetPluginsNoRefresh(&plugins);
for (const WebPluginInfo& plugin : plugins) {
if (plugin.path == plugin_path) {
*info = plugin;
return true;
}
}
return false;
}
std::u16string PluginServiceImpl::GetPluginDisplayNameByPath(
const base::FilePath& path) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
std::u16string plugin_name = path.LossyDisplayName();
WebPluginInfo info;
if (PluginService::GetInstance()->GetPluginInfoByPath(path, &info) &&
!info.name.empty()) {
plugin_name = info.name;
#if BUILDFLAG(IS_MAC)
// Many plugins on the Mac have .plugin in the actual name, which looks
// terrible, so look for that and strip it off if present.
static constexpr std::u16string_view kPluginExtension = u".plugin";
if (base::EndsWith(plugin_name, kPluginExtension))
plugin_name.erase(plugin_name.size() - kPluginExtension.size());
#endif // BUILDFLAG(IS_MAC)
}
return plugin_name;
}
void PluginServiceImpl::GetPlugins(GetPluginsCallback callback) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
// Run `callback` later, to stay compatible with prior behavior.
base::SequencedTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE, base::BindOnce(std::move(callback), GetPluginsSynchronous()));
}
std::vector<WebPluginInfo> PluginServiceImpl::GetPluginsSynchronous() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
std::vector<WebPluginInfo> plugins;
PluginList::Singleton()->GetPlugins(&plugins);
return plugins;
}
void PluginServiceImpl::RegisterPlugins() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
#if BUILDFLAG(ENABLE_PPAPI)
ComputePepperPluginList(&plugins_);
#else
GetContentClient()->AddPlugins(&plugins_);
#endif // BUILDFLAG(ENABLE_PPAPI)
for (const auto& plugin : plugins_)
RegisterInternalPlugin(plugin.ToWebPluginInfo(), /*add_at_beginning=*/true);
}
// There should generally be very few plugins so a brute-force search is fine.
const ContentPluginInfo* PluginServiceImpl::GetRegisteredPluginInfo(
const base::FilePath& plugin_path) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
for (auto& plugin : plugins_) {
if (plugin.path == plugin_path)
return &plugin;
}
#if BUILDFLAG(ENABLE_PPAPI)
// We did not find the plugin in our list. But wait! the plugin can also
// be a latecomer, as it happens with pepper flash. This information
// can be obtained from the PluginList singleton and we can use it to
// construct it and add it to the list. This same deal needs to be done
// in the renderer side in PepperPluginRegistry.
WebPluginInfo webplugin_info;
if (!GetPluginInfoByPath(plugin_path, &webplugin_info))
return nullptr;
ContentPluginInfo new_pepper_info;
if (!MakePepperPluginInfo(webplugin_info, &new_pepper_info))
return nullptr;
plugins_.push_back(new_pepper_info);
return &plugins_.back();
#else
return nullptr;
#endif // BUILDFLAG(ENABLE_PPAPI)
}
void PluginServiceImpl::SetFilter(PluginServiceFilter* filter) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
filter_ = filter;
}
PluginServiceFilter* PluginServiceImpl::GetFilter() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
return filter_;
}
static const unsigned int kMaxCrashesPerInterval = 3;
static const unsigned int kCrashesInterval = 120;
void PluginServiceImpl::RegisterPluginCrash(const base::FilePath& path) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
auto i = crash_times_.find(path);
if (i == crash_times_.end()) {
crash_times_[path] = std::vector<base::Time>();
i = crash_times_.find(path);
}
if (i->second.size() == kMaxCrashesPerInterval) {
i->second.erase(i->second.begin());
}
base::Time time = base::Time::Now();
i->second.push_back(time);
}
bool PluginServiceImpl::IsPluginUnstable(const base::FilePath& path) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
std::map<base::FilePath, std::vector<base::Time> >::const_iterator i =
crash_times_.find(path);
if (i == crash_times_.end()) {
return false;
}
if (i->second.size() != kMaxCrashesPerInterval) {
return false;
}
base::TimeDelta delta = base::Time::Now() - i->second[0];
return delta.InSeconds() <= kCrashesInterval;
}
void PluginServiceImpl::RefreshPlugins() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
PluginList::Singleton()->RefreshPlugins();
}
void PluginServiceImpl::RegisterInternalPlugin(
const WebPluginInfo& info,
bool add_at_beginning) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
PluginList::Singleton()->RegisterInternalPlugin(info, add_at_beginning);
}
void PluginServiceImpl::UnregisterInternalPlugin(const base::FilePath& path) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
PluginList::Singleton()->UnregisterInternalPlugin(path);
}
void PluginServiceImpl::GetInternalPlugins(
std::vector<WebPluginInfo>* plugins) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
PluginList::Singleton()->GetInternalPlugins(plugins);
}
bool PluginServiceImpl::PpapiDevChannelSupported(
BrowserContext* browser_context,
const GURL& document_url) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
return GetContentClient()->browser()->IsPluginAllowedToUseDevChannelAPIs(
browser_context, document_url);
}
} // namespace content