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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/worker_host/worker_process_host.h"
#include <set>
#include <string>
#include <vector>
#include "base/base_switches.h"
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/callback.h"
#include "base/command_line.h"
#include "base/message_loop/message_loop.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "content/browser/appcache/appcache_dispatcher_host.h"
#include "content/browser/appcache/chrome_appcache_service.h"
#include "content/browser/browser_child_process_host_impl.h"
#include "content/browser/child_process_security_policy_impl.h"
#include "content/browser/devtools/worker_devtools_manager.h"
#include "content/browser/devtools/worker_devtools_message_filter.h"
#include "content/browser/fileapi/fileapi_message_filter.h"
#include "content/browser/indexed_db/indexed_db_dispatcher_host.h"
#include "content/browser/loader/resource_message_filter.h"
#include "content/browser/mime_registry_message_filter.h"
#include "content/browser/quota_dispatcher_host.h"
#include "content/browser/renderer_host/database_message_filter.h"
#include "content/browser/renderer_host/file_utilities_message_filter.h"
#include "content/browser/renderer_host/render_view_host_delegate.h"
#include "content/browser/renderer_host/render_view_host_impl.h"
#include "content/browser/renderer_host/socket_stream_dispatcher_host.h"
#include "content/browser/resource_context_impl.h"
#include "content/browser/worker_host/message_port_service.h"
#include "content/browser/worker_host/worker_message_filter.h"
#include "content/browser/worker_host/worker_service_impl.h"
#include "content/common/child_process_host_impl.h"
#include "content/common/view_messages.h"
#include "content/common/worker_messages.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/content_browser_client.h"
#include "content/public/browser/user_metrics.h"
#include "content/public/common/content_switches.h"
#include "content/public/common/result_codes.h"
#include "ipc/ipc_switches.h"
#include "net/base/mime_util.h"
#include "net/base/registry_controlled_domains/registry_controlled_domain.h"
#include "net/url_request/url_request_context_getter.h"
#include "ui/base/ui_base_switches.h"
#include "webkit/browser/fileapi/file_system_context.h"
#include "webkit/browser/fileapi/sandbox_file_system_backend.h"
#include "webkit/common/resource_type.h"
#if defined(OS_WIN)
#include "content/common/sandbox_win.h"
#include "content/public/common/sandboxed_process_launcher_delegate.h"
#endif
namespace content {
namespace {
#if defined(OS_WIN)
// NOTE: changes to this class need to be reviewed by the security team.
class WorkerSandboxedProcessLauncherDelegate
: public content::SandboxedProcessLauncherDelegate {
public:
WorkerSandboxedProcessLauncherDelegate() {}
virtual ~WorkerSandboxedProcessLauncherDelegate() {}
virtual void PreSpawnTarget(sandbox::TargetPolicy* policy,
bool* success) {
AddBaseHandleClosePolicy(policy);
}
};
#endif // OS_WIN
} // namespace
// Notifies RenderViewHost that one or more worker objects crashed.
void WorkerCrashCallback(int render_process_unique_id, int render_view_id) {
RenderViewHostImpl* host =
RenderViewHostImpl::FromID(render_process_unique_id, render_view_id);
if (host)
host->GetDelegate()->WorkerCrashed();
}
WorkerProcessHost::WorkerProcessHost(
ResourceContext* resource_context,
const WorkerStoragePartition& partition)
: resource_context_(resource_context),
partition_(partition),
process_launched_(false) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
DCHECK(resource_context_);
process_.reset(
new BrowserChildProcessHostImpl(PROCESS_TYPE_WORKER, this));
}
WorkerProcessHost::~WorkerProcessHost() {
// If we crashed, tell the RenderViewHosts.
for (Instances::iterator i = instances_.begin(); i != instances_.end(); ++i) {
const WorkerDocumentSet::DocumentInfoSet& parents =
i->worker_document_set()->documents();
for (WorkerDocumentSet::DocumentInfoSet::const_iterator parent_iter =
parents.begin(); parent_iter != parents.end(); ++parent_iter) {
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE,
base::Bind(&WorkerCrashCallback, parent_iter->render_process_id(),
parent_iter->render_view_id()));
}
WorkerServiceImpl::GetInstance()->NotifyWorkerDestroyed(
this, i->worker_route_id());
}
ChildProcessSecurityPolicyImpl::GetInstance()->Remove(
process_->GetData().id);
}
bool WorkerProcessHost::Send(IPC::Message* message) {
return process_->Send(message);
}
bool WorkerProcessHost::Init(int render_process_id) {
std::string channel_id = process_->GetHost()->CreateChannel();
if (channel_id.empty())
return false;
#if defined(OS_LINUX)
int flags = ChildProcessHost::CHILD_ALLOW_SELF;
#else
int flags = ChildProcessHost::CHILD_NORMAL;
#endif
base::FilePath exe_path = ChildProcessHost::GetChildPath(flags);
if (exe_path.empty())
return false;
CommandLine* cmd_line = new CommandLine(exe_path);
cmd_line->AppendSwitchASCII(switches::kProcessType, switches::kWorkerProcess);
cmd_line->AppendSwitchASCII(switches::kProcessChannelID, channel_id);
std::string locale = GetContentClient()->browser()->GetApplicationLocale();
cmd_line->AppendSwitchASCII(switches::kLang, locale);
static const char* const kSwitchNames[] = {
switches::kDisableApplicationCache,
switches::kDisableDatabases,
#if defined(OS_WIN)
switches::kDisableDesktopNotifications,
#endif
switches::kDisableFileSystem,
switches::kDisableSeccompFilterSandbox,
switches::kEnableExperimentalWebPlatformFeatures,
#if defined(OS_MACOSX)
switches::kEnableSandboxLogging,
#endif
};
cmd_line->CopySwitchesFrom(*CommandLine::ForCurrentProcess(), kSwitchNames,
arraysize(kSwitchNames));
#if defined(OS_POSIX)
bool use_zygote = true;
if (CommandLine::ForCurrentProcess()->HasSwitch(
switches::kWaitForDebuggerChildren)) {
// Look to pass-on the kWaitForDebugger flag.
std::string value = CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
switches::kWaitForDebuggerChildren);
if (value.empty() || value == switches::kWorkerProcess) {
cmd_line->AppendSwitch(switches::kWaitForDebugger);
use_zygote = false;
}
}
if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kDebugChildren)) {
// Look to pass-on the kDebugOnStart flag.
std::string value = CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
switches::kDebugChildren);
if (value.empty() || value == switches::kWorkerProcess) {
// launches a new xterm, and runs the worker process in gdb, reading
// optional commands from gdb_chrome file in the working directory.
cmd_line->PrependWrapper("xterm -e gdb -x gdb_chrome --args");
use_zygote = false;
}
}
#endif
process_->Launch(
#if defined(OS_WIN)
new WorkerSandboxedProcessLauncherDelegate,
#elif defined(OS_POSIX)
use_zygote,
base::EnvironmentMap(),
#endif
cmd_line);
ChildProcessSecurityPolicyImpl::GetInstance()->AddWorker(
process_->GetData().id, render_process_id);
CreateMessageFilters(render_process_id);
return true;
}
void WorkerProcessHost::CreateMessageFilters(int render_process_id) {
ChromeBlobStorageContext* blob_storage_context =
GetChromeBlobStorageContextForResourceContext(resource_context_);
StreamContext* stream_context =
GetStreamContextForResourceContext(resource_context_);
net::URLRequestContextGetter* url_request_context =
partition_.url_request_context();
ResourceMessageFilter::GetContextsCallback get_contexts_callback(
base::Bind(&WorkerProcessHost::GetContexts,
base::Unretained(this)));
ResourceMessageFilter* resource_message_filter = new ResourceMessageFilter(
process_->GetData().id, PROCESS_TYPE_WORKER,
partition_.appcache_service(),
blob_storage_context,
partition_.filesystem_context(),
get_contexts_callback);
process_->AddFilter(resource_message_filter);
worker_message_filter_ = new WorkerMessageFilter(
render_process_id, resource_context_, partition_,
base::Bind(&WorkerServiceImpl::next_worker_route_id,
base::Unretained(WorkerServiceImpl::GetInstance())));
process_->AddFilter(worker_message_filter_.get());
process_->AddFilter(new AppCacheDispatcherHost(
partition_.appcache_service(), process_->GetData().id));
process_->AddFilter(new FileAPIMessageFilter(
process_->GetData().id,
url_request_context,
partition_.filesystem_context(),
blob_storage_context,
stream_context));
process_->AddFilter(new FileUtilitiesMessageFilter(
process_->GetData().id));
process_->AddFilter(new MimeRegistryMessageFilter());
process_->AddFilter(new DatabaseMessageFilter(partition_.database_tracker()));
process_->AddFilter(new QuotaDispatcherHost(
process_->GetData().id,
partition_.quota_manager(),
GetContentClient()->browser()->CreateQuotaPermissionContext()));
SocketStreamDispatcherHost::GetRequestContextCallback
request_context_callback(
base::Bind(&WorkerProcessHost::GetRequestContext,
base::Unretained(this)));
SocketStreamDispatcherHost* socket_stream_dispatcher_host =
new SocketStreamDispatcherHost(
render_process_id,
request_context_callback,
resource_context_);
socket_stream_dispatcher_host_ = socket_stream_dispatcher_host;
process_->AddFilter(socket_stream_dispatcher_host);
process_->AddFilter(new WorkerDevToolsMessageFilter(process_->GetData().id));
process_->AddFilter(new IndexedDBDispatcherHost(
process_->GetData().id, partition_.indexed_db_context()));
}
void WorkerProcessHost::CreateWorker(const WorkerInstance& instance) {
ChildProcessSecurityPolicyImpl::GetInstance()->GrantRequestURL(
process_->GetData().id, instance.url());
instances_.push_back(instance);
WorkerProcessMsg_CreateWorker_Params params;
params.url = instance.url();
params.name = instance.name();
params.route_id = instance.worker_route_id();
params.creator_process_id = instance.parent_process_id();
params.shared_worker_appcache_id = instance.main_resource_appcache_id();
Send(new WorkerProcessMsg_CreateWorker(params));
UpdateTitle();
// Walk all pending filters and let them know the worker has been created
// (could be more than one in the case where we had to queue up worker
// creation because the worker process limit was reached).
for (WorkerInstance::FilterList::const_iterator i =
instance.filters().begin();
i != instance.filters().end(); ++i) {
CHECK(i->first);
i->first->Send(new ViewMsg_WorkerCreated(i->second));
}
}
bool WorkerProcessHost::FilterMessage(const IPC::Message& message,
WorkerMessageFilter* filter) {
for (Instances::iterator i = instances_.begin(); i != instances_.end(); ++i) {
if (!i->closed() && i->HasFilter(filter, message.routing_id())) {
RelayMessage(message, worker_message_filter_.get(), i->worker_route_id());
return true;
}
}
return false;
}
void WorkerProcessHost::OnProcessLaunched() {
process_launched_ = true;
WorkerServiceImpl::GetInstance()->NotifyWorkerProcessCreated();
}
bool WorkerProcessHost::OnMessageReceived(const IPC::Message& message) {
bool msg_is_ok = true;
bool handled = true;
IPC_BEGIN_MESSAGE_MAP_EX(WorkerProcessHost, message, msg_is_ok)
IPC_MESSAGE_HANDLER(WorkerHostMsg_WorkerContextClosed,
OnWorkerContextClosed)
IPC_MESSAGE_HANDLER(WorkerProcessHostMsg_AllowDatabase, OnAllowDatabase)
IPC_MESSAGE_HANDLER(WorkerProcessHostMsg_AllowFileSystem, OnAllowFileSystem)
IPC_MESSAGE_HANDLER(WorkerProcessHostMsg_AllowIndexedDB, OnAllowIndexedDB)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP_EX()
if (!msg_is_ok) {
NOTREACHED();
RecordAction(UserMetricsAction("BadMessageTerminate_WPH"));
base::KillProcess(
process_->GetData().handle, RESULT_CODE_KILLED_BAD_MESSAGE, false);
}
if (handled)
return true;
if (message.type() == WorkerHostMsg_WorkerContextDestroyed::ID) {
WorkerServiceImpl::GetInstance()->NotifyWorkerDestroyed(
this, message.routing_id());
}
for (Instances::iterator i = instances_.begin(); i != instances_.end(); ++i) {
if (i->worker_route_id() == message.routing_id()) {
if (message.type() == WorkerHostMsg_WorkerContextDestroyed::ID) {
instances_.erase(i);
UpdateTitle();
}
return true;
}
}
return false;
}
// Sent to notify the browser process when a worker context invokes close(), so
// no new connections are sent to shared workers.
void WorkerProcessHost::OnWorkerContextClosed(int worker_route_id) {
for (Instances::iterator i = instances_.begin(); i != instances_.end(); ++i) {
if (i->worker_route_id() == worker_route_id) {
// Set the closed flag - this will stop any further messages from
// being sent to the worker (messages can still be sent from the worker,
// for exception reporting, etc).
i->set_closed(true);
break;
}
}
}
void WorkerProcessHost::OnAllowDatabase(int worker_route_id,
const GURL& url,
const string16& name,
const string16& display_name,
unsigned long estimated_size,
bool* result) {
*result = GetContentClient()->browser()->AllowWorkerDatabase(
url, name, display_name, estimated_size, resource_context_,
GetRenderViewIDsForWorker(worker_route_id));
}
void WorkerProcessHost::OnAllowFileSystem(int worker_route_id,
const GURL& url,
bool* result) {
*result = GetContentClient()->browser()->AllowWorkerFileSystem(
url, resource_context_, GetRenderViewIDsForWorker(worker_route_id));
}
void WorkerProcessHost::OnAllowIndexedDB(int worker_route_id,
const GURL& url,
const string16& name,
bool* result) {
*result = GetContentClient()->browser()->AllowWorkerIndexedDB(
url, name, resource_context_, GetRenderViewIDsForWorker(worker_route_id));
}
void WorkerProcessHost::RelayMessage(
const IPC::Message& message,
WorkerMessageFilter* filter,
int route_id) {
if (message.type() == WorkerMsg_Connect::ID) {
// Crack the SharedWorker Connect message to setup routing for the port.
int sent_message_port_id;
int new_routing_id;
if (!WorkerMsg_Connect::Read(
&message, &sent_message_port_id, &new_routing_id)) {
return;
}
new_routing_id = filter->GetNextRoutingID();
MessagePortService::GetInstance()->UpdateMessagePort(
sent_message_port_id, filter, new_routing_id);
// Resend the message with the new routing id.
filter->Send(new WorkerMsg_Connect(
route_id, sent_message_port_id, new_routing_id));
// Send any queued messages for the sent port.
MessagePortService::GetInstance()->SendQueuedMessagesIfPossible(
sent_message_port_id);
} else {
IPC::Message* new_message = new IPC::Message(message);
new_message->set_routing_id(route_id);
filter->Send(new_message);
if (message.type() == WorkerMsg_StartWorkerContext::ID) {
WorkerDevToolsManager::GetInstance()->WorkerContextStarted(
this, route_id);
}
return;
}
}
void WorkerProcessHost::ShutdownSocketStreamDispatcherHostIfNecessary() {
if (!instances_.size() && socket_stream_dispatcher_host_.get()) {
// We can assume that this object is going to delete, because
// currently a WorkerInstance will never be added to a WorkerProcessHost
// once it is initialized.
// SocketStreamDispatcherHost should be notified now that the worker
// process will shutdown soon.
socket_stream_dispatcher_host_->Shutdown();
socket_stream_dispatcher_host_ = NULL;
}
}
void WorkerProcessHost::FilterShutdown(WorkerMessageFilter* filter) {
for (Instances::iterator i = instances_.begin(); i != instances_.end();) {
bool shutdown = false;
i->RemoveFilters(filter);
i->worker_document_set()->RemoveAll(filter);
if (i->worker_document_set()->IsEmpty()) {
shutdown = true;
}
if (shutdown) {
Send(new WorkerMsg_TerminateWorkerContext(i->worker_route_id()));
i = instances_.erase(i);
} else {
++i;
}
}
ShutdownSocketStreamDispatcherHostIfNecessary();
}
bool WorkerProcessHost::CanShutdown() {
return instances_.empty();
}
void WorkerProcessHost::UpdateTitle() {
std::set<std::string> titles;
for (Instances::iterator i = instances_.begin(); i != instances_.end(); ++i) {
// Allow the embedder first crack at special casing the title.
std::string title = GetContentClient()->browser()->
GetWorkerProcessTitle(i->url(), resource_context_);
if (title.empty()) {
title = net::registry_controlled_domains::GetDomainAndRegistry(
i->url(),
net::registry_controlled_domains::EXCLUDE_PRIVATE_REGISTRIES);
}
// Use the host name if the domain is empty, i.e. localhost or IP address.
if (title.empty())
title = i->url().host();
// If the host name is empty, i.e. file url, use the path.
if (title.empty())
title = i->url().path();
titles.insert(title);
}
std::string display_title;
for (std::set<std::string>::iterator i = titles.begin();
i != titles.end(); ++i) {
if (!display_title.empty())
display_title += ", ";
display_title += *i;
}
process_->SetName(UTF8ToUTF16(display_title));
}
void WorkerProcessHost::DocumentDetached(WorkerMessageFilter* filter,
unsigned long long document_id) {
// Walk all instances and remove the document from their document set.
for (Instances::iterator i = instances_.begin(); i != instances_.end();) {
i->worker_document_set()->Remove(filter, document_id);
if (i->worker_document_set()->IsEmpty()) {
// This worker has no more associated documents - shut it down.
Send(new WorkerMsg_TerminateWorkerContext(i->worker_route_id()));
i = instances_.erase(i);
} else {
++i;
}
}
ShutdownSocketStreamDispatcherHostIfNecessary();
}
void WorkerProcessHost::TerminateWorker(int worker_route_id) {
Send(new WorkerMsg_TerminateWorkerContext(worker_route_id));
}
void WorkerProcessHost::SetBackgrounded(bool backgrounded) {
process_->SetBackgrounded(backgrounded);
}
const ChildProcessData& WorkerProcessHost::GetData() {
return process_->GetData();
}
std::vector<std::pair<int, int> > WorkerProcessHost::GetRenderViewIDsForWorker(
int worker_route_id) {
std::vector<std::pair<int, int> > result;
WorkerProcessHost::Instances::const_iterator i;
for (i = instances_.begin(); i != instances_.end(); ++i) {
if (i->worker_route_id() != worker_route_id)
continue;
const WorkerDocumentSet::DocumentInfoSet& documents =
i->worker_document_set()->documents();
for (WorkerDocumentSet::DocumentInfoSet::const_iterator doc =
documents.begin(); doc != documents.end(); ++doc) {
result.push_back(
std::make_pair(doc->render_process_id(), doc->render_view_id()));
}
break;
}
return result;
}
void WorkerProcessHost::GetContexts(const ResourceHostMsg_Request& request,
ResourceContext** resource_context,
net::URLRequestContext** request_context) {
*resource_context = resource_context_;
*request_context = partition_.url_request_context()->GetURLRequestContext();
}
net::URLRequestContext* WorkerProcessHost::GetRequestContext(
ResourceType::Type resource_type) {
return partition_.url_request_context()->GetURLRequestContext();
}
WorkerProcessHost::WorkerInstance::WorkerInstance(
const GURL& url,
const string16& name,
int worker_route_id,
int parent_process_id,
int64 main_resource_appcache_id,
ResourceContext* resource_context,
const WorkerStoragePartition& partition)
: url_(url),
closed_(false),
name_(name),
worker_route_id_(worker_route_id),
parent_process_id_(parent_process_id),
main_resource_appcache_id_(main_resource_appcache_id),
worker_document_set_(new WorkerDocumentSet()),
resource_context_(resource_context),
partition_(partition) {
DCHECK(resource_context_);
}
WorkerProcessHost::WorkerInstance::WorkerInstance(
const GURL& url,
bool shared,
const string16& name,
ResourceContext* resource_context,
const WorkerStoragePartition& partition)
: url_(url),
closed_(false),
name_(name),
worker_route_id_(MSG_ROUTING_NONE),
parent_process_id_(0),
main_resource_appcache_id_(0),
worker_document_set_(new WorkerDocumentSet()),
resource_context_(resource_context),
partition_(partition) {
DCHECK(resource_context_);
}
WorkerProcessHost::WorkerInstance::~WorkerInstance() {
}
// Compares an instance based on the algorithm in the WebWorkers spec - an
// instance matches if the origins of the URLs match, and:
// a) the names are non-empty and equal
// -or-
// b) the names are both empty, and the urls are equal
bool WorkerProcessHost::WorkerInstance::Matches(
const GURL& match_url,
const string16& match_name,
const WorkerStoragePartition& partition,
ResourceContext* resource_context) const {
// Only match open shared workers.
if (closed_)
return false;
// ResourceContext equivalence is being used as a proxy to ensure we only
// matched shared workers within the same BrowserContext.
if (resource_context_ != resource_context)
return false;
// We must be in the same storage partition otherwise sharing will violate
// isolation.
if (!partition_.Equals(partition))
return false;
if (url_.GetOrigin() != match_url.GetOrigin())
return false;
if (name_.empty() && match_name.empty())
return url_ == match_url;
return name_ == match_name;
}
void WorkerProcessHost::WorkerInstance::AddFilter(WorkerMessageFilter* filter,
int route_id) {
CHECK(filter);
if (!HasFilter(filter, route_id)) {
FilterInfo info(filter, route_id);
filters_.push_back(info);
}
}
void WorkerProcessHost::WorkerInstance::RemoveFilter(
WorkerMessageFilter* filter, int route_id) {
for (FilterList::iterator i = filters_.begin(); i != filters_.end();) {
if (i->first == filter && i->second == route_id)
i = filters_.erase(i);
else
++i;
}
// Should not be duplicate copies in the filter set.
DCHECK(!HasFilter(filter, route_id));
}
void WorkerProcessHost::WorkerInstance::RemoveFilters(
WorkerMessageFilter* filter) {
for (FilterList::iterator i = filters_.begin(); i != filters_.end();) {
if (i->first == filter)
i = filters_.erase(i);
else
++i;
}
}
bool WorkerProcessHost::WorkerInstance::HasFilter(
WorkerMessageFilter* filter, int route_id) const {
for (FilterList::const_iterator i = filters_.begin(); i != filters_.end();
++i) {
if (i->first == filter && i->second == route_id)
return true;
}
return false;
}
bool WorkerProcessHost::WorkerInstance::RendererIsParent(
int render_process_id, int render_view_id) const {
const WorkerDocumentSet::DocumentInfoSet& parents =
worker_document_set()->documents();
for (WorkerDocumentSet::DocumentInfoSet::const_iterator parent_iter =
parents.begin();
parent_iter != parents.end(); ++parent_iter) {
if (parent_iter->render_process_id() == render_process_id &&
parent_iter->render_view_id() == render_view_id) {
return true;
}
}
return false;
}
WorkerProcessHost::WorkerInstance::FilterInfo
WorkerProcessHost::WorkerInstance::GetFilter() const {
DCHECK(NumFilters() == 1);
return *filters_.begin();
}
} // namespace content
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