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chromium / chromium / src / 205191a32c9db91062c5342e901b2da2d67a49e5 / . / extensions / renderer / dispatcher.cc
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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "extensions/renderer/dispatcher.h"
#include <stddef.h>
#include <algorithm>
#include <memory>
#include <string_view>
#include <utility>
#include <vector>
#include "base/command_line.h"
#include "base/containers/contains.h"
#include "base/debug/alias.h"
#include "base/debug/crash_logging.h"
#include "base/debug/dump_without_crashing.h"
#include "base/feature_list.h"
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/functional/callback_helpers.h"
#include "base/lazy_instance.h"
#include "base/memory/ptr_util.h"
#include "base/metrics/histogram_functions.h"
#include "base/metrics/histogram_macros.h"
#include "base/strings/span_printf.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "base/task/single_thread_task_runner.h"
#include "base/time/time.h"
#include "base/values.h"
#include "build/build_config.h"
#include "build/chromeos_buildflags.h"
#include "components/guest_view/buildflags/buildflags.h"
#include "content/public/common/content_features.h"
#include "content/public/common/content_switches.h"
#include "content/public/renderer/render_frame.h"
#include "content/public/renderer/render_thread.h"
#include "content/public/renderer/v8_value_converter.h"
#include "extensions/common/api/incognito.h"
#include "extensions/common/api/messaging/message.h"
#include "extensions/common/constants.h"
#include "extensions/common/cors_util.h"
#include "extensions/common/crash_keys.h"
#include "extensions/common/extension.h"
#include "extensions/common/extension_api.h"
#include "extensions/common/extension_features.h"
#include "extensions/common/extension_id.h"
#include "extensions/common/extension_urls.h"
#include "extensions/common/extensions_client.h"
#include "extensions/common/features/behavior_feature.h"
#include "extensions/common/features/feature.h"
#include "extensions/common/features/feature_channel.h"
#include "extensions/common/features/feature_developer_mode_only.h"
#include "extensions/common/features/feature_provider.h"
#include "extensions/common/features/feature_session_type.h"
#include "extensions/common/manifest_constants.h"
#include "extensions/common/manifest_handlers/background_info.h"
#include "extensions/common/manifest_handlers/incognito_info.h"
#include "extensions/common/manifest_handlers/options_page_info.h"
#include "extensions/common/mojom/context_type.mojom.h"
#include "extensions/common/mojom/host_id.mojom.h"
#include "extensions/common/permissions/permission_set.h"
#include "extensions/common/permissions/permissions_data.h"
#include "extensions/common/switches.h"
#include "extensions/common/user_scripts_allowed_state.h"
#include "extensions/common/utils/extension_utils.h"
#include "extensions/grit/extensions_renderer_resources.h"
#include "extensions/renderer/api/messaging/native_renderer_messaging_service.h"
#include "extensions/renderer/content_watcher.h"
#include "extensions/renderer/dom_activity_logger.h"
#include "extensions/renderer/extension_frame_helper.h"
#include "extensions/renderer/extension_interaction_provider.h"
#include "extensions/renderer/extensions_renderer_api_provider.h"
#include "extensions/renderer/extensions_renderer_client.h"
#include "extensions/renderer/ipc_message_sender.h"
#include "extensions/renderer/isolated_world_manager.h"
#include "extensions/renderer/module_system.h"
#include "extensions/renderer/native_extension_bindings_system.h"
#include "extensions/renderer/renderer_extension_registry.h"
#include "extensions/renderer/safe_builtins.h"
#include "extensions/renderer/script_context.h"
#include "extensions/renderer/script_context_set.h"
#include "extensions/renderer/script_injection_manager.h"
#include "extensions/renderer/service_worker_data.h"
#include "extensions/renderer/shared_l10n_map.h"
#include "extensions/renderer/static_v8_external_one_byte_string_resource.h"
#include "extensions/renderer/trace_util.h"
#include "extensions/renderer/v8_helpers.h"
#include "extensions/renderer/worker_script_context_set.h"
#include "extensions/renderer/worker_thread_dispatcher.h"
#include "extensions/renderer/worker_thread_util.h"
#include "gin/converter.h"
#include "services/network/public/mojom/cors.mojom.h"
#include "third_party/blink/public/common/associated_interfaces/associated_interface_registry.h"
#include "third_party/blink/public/common/tokens/tokens.h"
#include "third_party/blink/public/mojom/frame/user_activation_notification_type.mojom.h"
#include "third_party/blink/public/platform/web_string.h"
#include "third_party/blink/public/platform/web_url_request.h"
#include "third_party/blink/public/web/modules/service_worker/web_service_worker_context_proxy.h"
#include "third_party/blink/public/web/web_custom_element.h"
#include "third_party/blink/public/web/web_document.h"
#include "third_party/blink/public/web/web_frame.h"
#include "third_party/blink/public/web/web_local_frame.h"
#include "third_party/blink/public/web/web_script_controller.h"
#include "third_party/blink/public/web/web_security_policy.h"
#include "third_party/blink/public/web/web_settings.h"
#include "third_party/blink/public/web/web_v8_features.h"
#include "third_party/blink/public/web/web_view.h"
#include "ui/base/resource/resource_bundle.h"
#include "v8/include/v8-context.h"
#include "v8/include/v8-function.h"
#include "v8/include/v8-object.h"
#include "v8/include/v8-primitive.h"
using blink::WebDocument;
using blink::WebSecurityPolicy;
using blink::WebString;
using blink::WebView;
using content::RenderThread;
namespace extensions {
namespace {
// A feature flag for the crash issue in crbug.com/389971360.
BASE_FEATURE(kSpeculativeFixForServiceWorkerDataInDidStartServiceWorkerContext,
base::FEATURE_ENABLED_BY_DEFAULT);
// A feature flag for the crash issue in crbug.com/424476776.
BASE_FEATURE(kSpeculativeFixForNoExtensionInDidStartServiceWorkerContext,
base::FEATURE_ENABLED_BY_DEFAULT);
static const char kOnSuspendEvent[] = "runtime.onSuspend";
static const char kOnSuspendCanceledEvent[] = "runtime.onSuspendCanceled";
// TODO(crbug.com/389971360, crbug.com/424476776) Remove this enum class and
// `service_worker_context_state` once the issue is fixed. This is completely
// for debugging purpose in crbug.com/389971360. If crbug.com/424476776 relies
// on this enum, see if it can be simplified if the fix is proven.
enum class ServiceWorkerContextState {
kDefault = 0,
kInitializing = 1,
kInitialized = 2,
kScriptUrlIsNotExtensionScheme = 3,
kNoExtension = 4,
kExtensionAPIIsNotEnabledForServiceWorkerScript = 5,
kDestroying = 6,
kDestroyed = 7,
kUnloadedExtension = 8,
kDestroyedWithoutWorkerData = 9,
kMaxValue = kDestroyedWithoutWorkerData,
};
constinit thread_local ServiceWorkerContextState service_worker_context_state =
extensions::ServiceWorkerContextState::kDefault;
enum class ExtensionRendererLoadStatus {
// Extension is neither loaded in the registry nor unloaded.
kUnknownExtension = 0,
// Extension is loaded in the registry.
kExtensionLoaded = 1,
// Extension was loaded in the registry, but was unloaded.
kExtensionUnloaded = 2,
kMaxValue = kExtensionUnloaded,
};
// Returns whether or not extension APIs are allowed for the specified
// `script_url` and `scope`. The script must be specified in the extension's
// manifest background section and the scope must be the root scope of the
// extension.
bool ExtensionAPIEnabledForServiceWorkerScript(const GURL& scope,
const GURL& script_url) {
if (!script_url.SchemeIs(kExtensionScheme)) {
return false;
}
// This code runs on the service worker thread, so it needs to use the
// thread-safe refcounted version of GetExtensionOrAppByURL.
scoped_refptr<const Extension> extension =
RendererExtensionRegistry::Get()->GetRefCountedExtensionOrAppByURL(
script_url);
if (!extension || !BackgroundInfo::IsServiceWorkerBased(extension.get())) {
return false;
}
if (scope != extension->url()) {
return false;
}
return BackgroundInfo::GetBackgroundServiceWorkerScriptURL(extension.get()) ==
script_url;
}
// Calls a method |method_name| in a module |module_name| belonging to the
// module system from |context|. Intended as a callback target from
// ScriptContextSet::ForEach.
void CallModuleMethod(const std::string& module_name,
const std::string& method_name,
const base::Value::List* args,
ScriptContext* context) {
v8::HandleScope handle_scope(context->isolate());
v8::Context::Scope context_scope(context->v8_context());
std::unique_ptr<content::V8ValueConverter> converter =
content::V8ValueConverter::Create();
v8::LocalVector<v8::Value> arguments(context->isolate());
for (const auto& arg : *args) {
arguments.push_back(converter->ToV8Value(arg, context->v8_context()));
}
context->module_system()->CallModuleMethodSafe(
module_name, method_name, &arguments);
}
class HandleScopeHelper {
public:
HandleScopeHelper(ScriptContext* script_context)
: handle_scope_(script_context->isolate()),
context_scope_(script_context->v8_context()) {}
HandleScopeHelper(const HandleScopeHelper&) = delete;
HandleScopeHelper& operator=(const HandleScopeHelper&) = delete;
private:
v8::HandleScope handle_scope_;
v8::Context::Scope context_scope_;
};
base::LazyInstance<WorkerScriptContextSet>::DestructorAtExit
g_worker_script_context_set = LAZY_INSTANCE_INITIALIZER;
// Creates a new extension from the data in the mojom::ExtensionLoadedParams
// object. A context_id needs to be passed because each browser context can have
// different values for default_policy_blocked/allowed_hosts.
// (see extension_util.cc#GetBrowserContextId)
scoped_refptr<Extension> ConvertToExtension(
mojom::ExtensionLoadedParamsPtr params,
int context_id,
std::u16string* error) {
// We pass in the |id| to the create call because it will save work in the
// normal case, and because in tests, extensions may not have paths or keys,
// but it's important to retain the same id.
scoped_refptr<Extension> extension =
Extension::Create(params->path, params->location, params->manifest,
params->creation_flags, params->id, error);
if (!extension.get())
return extension;
const PermissionsData* permissions_data = extension->permissions_data();
permissions_data->SetPermissions(
std::make_unique<const PermissionSet>(
std::move(params->active_permissions)),
std::make_unique<const PermissionSet>(
std::move(params->withheld_permissions)));
permissions_data->SetContextId(context_id);
if (params->uses_default_policy_blocked_allowed_hosts) {
permissions_data->SetUsesDefaultHostRestrictions();
} else {
permissions_data->SetPolicyHostRestrictions(params->policy_blocked_hosts,
params->policy_allowed_hosts);
}
for (const auto& pair : params->tab_specific_permissions) {
permissions_data->UpdateTabSpecificPermissions(pair.first, pair.second);
}
extension->SetGUID(params->guid);
return extension;
}
using IncognitoManifestKeys = api::incognito::ManifestKeys;
base::debug::CrashKeyString* GetCrashKey(const char* key) {
static auto* crash_key = base::debug::AllocateCrashKeyString(
key, base::debug::CrashKeySize::Size32);
return crash_key;
}
const ExtensionId& GetExtensionIdValue(const Extension& extension) {
return extension.id();
}
std::string GetManifestVersionValue(const Extension& extension) {
return base::NumberToString(extension.manifest_version());
}
const char* GetServiceWorkerBasedValue(const Extension& extension) {
return BackgroundInfo::IsServiceWorkerBased(&extension) ? "yes" : "no";
}
const char* GetIncognitoModeValue(const Extension& extension) {
IncognitoInfo* info = static_cast<IncognitoInfo*>(
extension.GetManifestData(IncognitoManifestKeys::kIncognito));
if (!info) {
return "no_incognito_info";
}
return api::incognito::ToString(info->mode);
}
const char* GetIncognitoProcessValue(
const ExtensionsRendererClient* renderer_client) {
if (!renderer_client) {
return "no_renderer_client";
}
return renderer_client->IsIncognitoProcess() ? "yes" : "no";
}
} // namespace
namespace debug {
// Helper for adding a set of missing activation token related crash keys.
//
// It is created when being notified that an extension worker will evaluate (is
// in the process of starting) and we might detect that there isn't an
// activation token recorded for the extension worker.
//
// All keys are logged every time this class is instantiated.
class ScopedActivationTokenMissingCrashKeys {
public:
explicit ScopedActivationTokenMissingCrashKeys(
const Extension& extension,
const ExtensionsRendererClient* renderer_client)
: extension_id_crash_key_(GetCrashKey("ext_token_id"),
GetExtensionIdValue(extension)),
manifest_version_crash_key_(GetCrashKey("ext_token_manifest_version"),
GetManifestVersionValue(extension)),
sw_based_crash_key_(GetCrashKey("ext_token_sw_based"),
GetServiceWorkerBasedValue(extension)),
incognito_mode_crash_key_(GetCrashKey("ext_token_incog_mode"),
GetIncognitoModeValue(extension)),
incognito_process_crash_key_(
GetCrashKey("ext_token_incog_process"),
GetIncognitoProcessValue(renderer_client)) {}
~ScopedActivationTokenMissingCrashKeys() = default;
private:
// ExtensionId of the extension.
base::debug::ScopedCrashKeyString extension_id_crash_key_;
// The manifest version of the extension.
base::debug::ScopedCrashKeyString manifest_version_crash_key_;
// Whether the extension has a service worker background script registered in
// the manifest.
base::debug::ScopedCrashKeyString sw_based_crash_key_;
// What the api::incognito::IncognitoMode is for the extension.
base::debug::ScopedCrashKeyString incognito_mode_crash_key_;
// Whether the renderer process for the extension was launched incognito.
base::debug::ScopedCrashKeyString incognito_process_crash_key_;
};
} // namespace debug
Dispatcher::PendingServiceWorker::PendingServiceWorker(
blink::WebServiceWorkerContextProxy* context_proxy)
: task_runner(base::SingleThreadTaskRunner::GetCurrentDefault()),
context_proxy(context_proxy) {
DCHECK(context_proxy);
}
Dispatcher::PendingServiceWorker::~PendingServiceWorker() = default;
// Note that we can't use Blink public APIs in the constructor because Blink
// is not initialized at the point we create Dispatcher.
Dispatcher::Dispatcher(
std::vector<std::unique_ptr<const ExtensionsRendererAPIProvider>>
api_providers)
: api_providers_(std::move(api_providers)),
content_watcher_(new ContentWatcher()),
source_map_(&ui::ResourceBundle::GetSharedInstance()),
v8_schema_registry_(new V8SchemaRegistry),
activity_logging_enabled_(false),
receiver_(this),
dispatcher_(this) {
bindings_system_ = CreateBindingsSystem(
this, IPCMessageSender::CreateMainThreadIPCMessageSender());
script_context_set_ =
std::make_unique<ScriptContextSet>(&active_extension_ids_);
user_script_set_manager_ = std::make_unique<UserScriptSetManager>();
script_injection_manager_ =
std::make_unique<ScriptInjectionManager>(user_script_set_manager_.get());
user_script_set_manager_observation_.Observe(user_script_set_manager_.get());
PopulateSourceMap();
// Ideally this should be done after checking
// ExtensionAPIEnabledInExtensionServiceWorkers(), but the Dispatcher is
// created so early that sending an IPC from browser/ process to synchronize
// this enabled-ness is too late.
WorkerThreadDispatcher::Get()->Init(RenderThread::Get());
// Register WebSecurityPolicy allowlists for the chrome-extension:// scheme.
WebString extension_scheme(WebString::FromASCII(kExtensionScheme));
// Extension resources are HTTP-like and safe to expose to the fetch API. The
// rules for the fetch API are consistent with XHR.
WebSecurityPolicy::RegisterURLSchemeAsSupportingFetchAPI(extension_scheme);
// Register WebSecurityPolicy allowlists for the file:// scheme.
WebString file_scheme(WebString::FromASCII(url::kFileScheme));
// Extensions are allowed to make cross-origin requests to file scheme iff the
// user explicitly grants them access post-installation in the
// chrome://extensions page.
WebSecurityPolicy::RegisterURLSchemeAsSupportingFetchAPI(file_scheme);
// Extension resources, when loaded as the top-level document, should bypass
// Blink's strict first-party origin checks.
WebSecurityPolicy::RegisterURLSchemeAsFirstPartyWhenTopLevel(
extension_scheme);
// Disallow running javascript URLs on the chrome-extension scheme.
WebSecurityPolicy::RegisterURLSchemeAsNotAllowingJavascriptURLs(
extension_scheme);
#if !BUILDFLAG(IS_ANDROID)
// Currently, extensions are only available on desktop, and are process-
// separated from regular web contents. Therefore, it is safe to give them
// access to SharedArrayBuffers.
WebSecurityPolicy::RegisterURLSchemeAsAllowingSharedArrayBuffers(
extension_scheme);
#endif
// chrome-extension: resources should be allowed to register ServiceWorkers.
WebSecurityPolicy::RegisterURLSchemeAsAllowingServiceWorkers(
extension_scheme);
WebSecurityPolicy::RegisterURLSchemeAsAllowingWasmEvalCSP(extension_scheme);
// Initialize host permissions for any extensions that were activated before
// WebKit was initialized.
for (const ExtensionId& extension_id : active_extension_ids_) {
const Extension* extension =
RendererExtensionRegistry::Get()->GetByID(extension_id);
CHECK(extension);
InitOriginPermissions(extension);
}
EnableCustomElementAllowlist();
}
Dispatcher::~Dispatcher() {
}
// static
WorkerScriptContextSet* Dispatcher::GetWorkerScriptContextSet() {
return &(g_worker_script_context_set.Get());
}
// static
bool Dispatcher::ShouldNotifyServiceWorkerOnWebSocketActivity(
v8::Local<v8::Context> v8_context) {
ScriptContext* script_context =
GetWorkerScriptContextSet()->GetContextByV8Context(v8_context);
// Only notify on web socket activity if the service worker is the background
// service worker for an extension.
return script_context &&
ExtensionAPIEnabledForServiceWorkerScript(
script_context->service_worker_scope(), script_context->url());
}
void Dispatcher::OnRenderThreadStarted(content::RenderThread* thread) {
blink::WebScriptController::RegisterExtension(
SafeBuiltins::CreateV8Extension());
}
void Dispatcher::OnRenderFrameCreated(content::RenderFrame* render_frame) {
script_injection_manager_->OnRenderFrameCreated(render_frame);
content_watcher_->OnRenderFrameCreated(render_frame);
// The RenderFrame comes with the initial empty document already created.
DidCreateDocumentElement(render_frame->GetWebFrame());
// We run scripts on the empty document.
RunScriptsAtDocumentStart(render_frame);
}
bool Dispatcher::IsExtensionActive(const ExtensionId& extension_id) const {
const bool is_active = base::Contains(active_extension_ids_, extension_id);
if (is_active)
CHECK(RendererExtensionRegistry::Get()->Contains(extension_id));
return is_active;
}
void Dispatcher::DidCreateScriptContext(
blink::WebLocalFrame* frame,
const v8::Local<v8::Context>& v8_context,
int32_t world_id) {
const base::TimeTicks start_time = base::TimeTicks::Now();
ScriptContext* context = script_context_set_->Register(
frame, v8_context, world_id,
/*is_webview=*/webview_partition_id_.has_value());
// Initialize origin permissions for content scripts, which can't be
// initialized in |ActivateExtension|.
if (context->context_type() == mojom::ContextType::kContentScript) {
InitOriginPermissions(context->extension());
}
context->SetModuleSystem(
std::make_unique<ModuleSystem>(context, &source_map_));
ModuleSystem* module_system = context->module_system();
// Enable natives in startup.
ModuleSystem::NativesEnabledScope natives_enabled_scope(module_system);
RegisterNativeHandlers(module_system, context, bindings_system_.get(),
v8_schema_registry_.get());
bindings_system_->DidCreateScriptContext(context);
#if BUILDFLAG(ENABLE_PLATFORM_APPS)
// Inject custom JS into the platform app context.
if (IsWithinPlatformApp()) {
module_system->Require("platformApp");
}
#endif
#if BUILDFLAG(ENABLE_GUEST_VIEW)
RequireGuestViewModules(context);
#endif
const base::TimeDelta elapsed = base::TimeTicks::Now() - start_time;
switch (context->context_type()) {
case mojom::ContextType::kUnspecified:
UMA_HISTOGRAM_TIMES("Extensions.DidCreateScriptContext_Unspecified",
elapsed);
break;
case mojom::ContextType::kPrivilegedExtension:
// For service workers this is handled in
// WillEvaluateServiceWorkerOnWorkerThread().
DCHECK(!context->IsForServiceWorker());
UMA_HISTOGRAM_TIMES("Extensions.DidCreateScriptContext_Blessed", elapsed);
break;
case mojom::ContextType::kUnprivilegedExtension:
UMA_HISTOGRAM_TIMES("Extensions.DidCreateScriptContext_Unblessed",
elapsed);
break;
case mojom::ContextType::kContentScript:
UMA_HISTOGRAM_TIMES("Extensions.DidCreateScriptContext_ContentScript",
elapsed);
break;
case mojom::ContextType::kWebPage:
UMA_HISTOGRAM_TIMES("Extensions.DidCreateScriptContext_WebPage", elapsed);
break;
case mojom::ContextType::kPrivilegedWebPage:
UMA_HISTOGRAM_TIMES("Extensions.DidCreateScriptContext_BlessedWebPage",
elapsed);
break;
case mojom::ContextType::kWebUi:
UMA_HISTOGRAM_TIMES("Extensions.DidCreateScriptContext_WebUI", elapsed);
break;
case mojom::ContextType::kUntrustedWebUi:
// Extension APIs in untrusted WebUIs are temporary so don't bother
// recording metrics for them.
break;
case mojom::ContextType::kOffscreenExtension:
case mojom::ContextType::kUserScript:
// We don't really care about offscreen extension context or user script
// context initialization time at the moment. Offscreen extension context
// initialization is a strict subset (and very similar to) privileged
// extension context time, while user script context initialization is
// very similar to content script initialization.
break;
}
VLOG(1) << "Num tracked contexts: " << script_context_set_->size();
ExtensionFrameHelper* frame_helper =
ExtensionFrameHelper::Get(content::RenderFrame::FromWebFrame(frame));
if (!frame_helper)
return; // The frame is invisible to extensions.
frame_helper->NotifyDidCreateScriptContext(world_id);
}
void Dispatcher::DidInitializeServiceWorkerContextOnWorkerThread(
blink::WebServiceWorkerContextProxy* context_proxy,
const GURL& service_worker_scope,
const GURL& script_url) {
if (!script_url.SchemeIs(kExtensionScheme))
return;
// Defer `PrepareForEvaluation` until `ModuleSystem` is created.
context_proxy->DeferPrepareForEvaluation();
{
base::AutoLock lock(service_workers_paused_for_on_loaded_message_lock_);
ExtensionId extension_id =
RendererExtensionRegistry::Get()->GetExtensionOrAppIDByURL(script_url);
// If the extension is already loaded we don't have to suspend the service
// worker. The service worker will continue in
// Dispatcher::WillEvaluateServiceWorkerOnWorkerThread().
if (RendererExtensionRegistry::Get()->GetByID(extension_id))
return;
// Suspend the service worker until loaded message of the extension comes.
// The service worker will be resumed in Dispatcher::OnLoaded().
context_proxy->PauseEvaluation();
service_workers_paused_for_on_loaded_message_.emplace(
extension_id, std::make_unique<PendingServiceWorker>(context_proxy));
}
}
void Dispatcher::WillEvaluateServiceWorkerOnWorkerThread(
blink::WebServiceWorkerContextProxy* context_proxy,
v8::Local<v8::Context> v8_context,
int64_t service_worker_version_id,
const GURL& service_worker_scope,
const GURL& script_url,
const blink::ServiceWorkerToken& service_worker_token) {
const base::TimeTicks start_time = base::TimeTicks::Now();
service_worker_context_state = ServiceWorkerContextState::kInitializing;
// TODO(crbug.com/40626913): We may want to give service workers not
// registered by extensions minimal bindings, the same as other webpage-like
// contexts.
if (!script_url.SchemeIs(kExtensionScheme)) {
// Early-out if this isn't a chrome-extension:// scheme, because looking up
// the extension registry is unnecessary if it's not. Checking this will
// also skip over hosted apps, which is the desired behavior - hosted app
// service workers are not our concern.
service_worker_context_state =
ServiceWorkerContextState::kScriptUrlIsNotExtensionScheme;
return;
}
// Runs the deferred `PrepareForEvaluation` before this returns.
base::ScopedClosureRunner run_at_return(base::BindOnce(
[](blink::WebServiceWorkerContextProxy* context_proxy) {
context_proxy->RunDeferredPrepareForEvaluation();
},
context_proxy));
// This function is called from a service worker thread, so we use the
// thread-safe refcounted version of GetExtensionOrAppByURL.
scoped_refptr<const Extension> extension =
RendererExtensionRegistry::Get()->GetRefCountedExtensionOrAppByURL(
script_url);
ExtensionRendererLoadStatus load_status =
ExtensionRendererLoadStatus::kUnknownExtension;
if (extension) {
load_status = ExtensionRendererLoadStatus::kExtensionLoaded;
} else if (base::Contains(unloaded_extensions_, script_url.GetHost())) {
// script_url.host() is the extension's ID.
load_status = ExtensionRendererLoadStatus::kExtensionUnloaded;
}
base::UmaHistogramEnumeration(
"Extensions.ServiceWorkerRenderer."
"ExtensionLoadStatusInWorkerScriptEvaluation",
load_status);
if (!extension) {
// Set the context state based on the extension load status.
if (load_status == ExtensionRendererLoadStatus::kExtensionUnloaded) {
service_worker_context_state =
ServiceWorkerContextState::kUnloadedExtension;
} else {
service_worker_context_state = ServiceWorkerContextState::kNoExtension;
}
// TODO(kalman): This is no good. Instead we need to either:
//
// - Hold onto the v8::Context and create the ScriptContext and install
// our bindings when this extension is loaded.
// - Deal with there being an extension ID (script_url.host()) but no
// extension associated with it.
//
// The former is safer, but is unfriendly to caching (e.g. session restore).
// It seems to contradict the service worker idiom.
//
// The latter is friendly to caching, but running extension code without an
// installed extension makes me nervous, and means that we won't be able to
// expose arbitrary (i.e. capability-checked) extension APIs to service
// workers. We will probably need to relax some assertions - we just need
// to find them.
//
// Perhaps this could be solved with our own event on the service worker
// saying that an extension is ready, and documenting that extension APIs
// won't work before that event has fired?
return;
}
if (!ExtensionAPIEnabledForServiceWorkerScript(service_worker_scope,
script_url)) {
service_worker_context_state = ServiceWorkerContextState::
kExtensionAPIIsNotEnabledForServiceWorkerScript;
return;
}
const int thread_id = content::WorkerThread::GetCurrentId();
CHECK_NE(thread_id, kMainThreadId);
// Only the script specific in the manifest's background data gets bindings.
//
// TODO(crbug.com/40626913): We may want to give other service workers
// registered by extensions minimal bindings, just as we might want to give
// them to service workers that aren't registered by extensions.
ScriptContext* context = new ScriptContext(
v8_context, nullptr, GenerateHostIdFromExtensionId(extension->id()),
extension.get(), /*blink_isolated_world_id=*/std::nullopt,
mojom::ContextType::kPrivilegedExtension, extension.get(),
mojom::ContextType::kPrivilegedExtension);
context->set_url(script_url);
context->set_service_worker_scope(service_worker_scope);
context->set_service_worker_version_id(service_worker_version_id);
WorkerThreadDispatcher* worker_dispatcher = WorkerThreadDispatcher::Get();
std::optional<base::UnguessableToken> worker_activation_token =
RendererExtensionRegistry::Get()->GetWorkerActivationToken(
extension->id());
std::unique_ptr<IPCMessageSender> ipc_sender =
IPCMessageSender::CreateWorkerThreadIPCMessageSender(
worker_dispatcher, context_proxy, service_worker_version_id);
{
CHECK(extension);
// TODO(crbug.com/357889496): Remove these crash keys once bug is resolved.
debug::ScopedActivationTokenMissingCrashKeys activation_token_missing_keys(
*extension, ExtensionsRendererClient::Get());
CHECK(worker_activation_token.has_value());
}
worker_dispatcher->AddWorkerData(
context_proxy, service_worker_version_id, worker_activation_token,
service_worker_token, context,
CreateBindingsSystem(worker_dispatcher, std::move(ipc_sender)));
// TODO(lazyboy): Make sure accessing |source_map_| in worker thread is
// safe.
context->SetModuleSystem(
std::make_unique<ModuleSystem>(context, &source_map_));
ModuleSystem* module_system = context->module_system();
// Enable natives in startup.
ModuleSystem::NativesEnabledScope natives_enabled_scope(module_system);
NativeExtensionBindingsSystem* worker_bindings_system =
WorkerThreadDispatcher::GetBindingsSystem();
RegisterNativeHandlers(module_system, context, worker_bindings_system,
WorkerThreadDispatcher::GetV8SchemaRegistry());
worker_bindings_system->DidCreateScriptContext(context);
#if BUILDFLAG(ENABLE_GUEST_VIEW)
// TODO(lazyboy): Get rid of RequireGuestViewModules() as this doesn't seem
// necessary for Extension SW.
RequireGuestViewModules(context);
#endif
WorkerThreadDispatcher::GetServiceWorkerData()->Init();
g_worker_script_context_set.Get().Insert(base::WrapUnique(context));
const base::TimeDelta elapsed = base::TimeTicks::Now() - start_time;
UMA_HISTOGRAM_TIMES(
"Extensions.DidInitializeServiceWorkerContextOnWorkerThread2", elapsed);
service_worker_context_state = ServiceWorkerContextState::kInitialized;
}
void Dispatcher::WillReleaseScriptContext(
blink::WebLocalFrame* frame,
const v8::Local<v8::Context>& v8_context,
int32_t world_id) {
ScriptContext* context = script_context_set_->GetByV8Context(v8_context);
if (!context)
return;
bindings_system_->WillReleaseScriptContext(context);
script_context_set_->Remove(context);
VLOG(1) << "Num tracked contexts: " << script_context_set_->size();
}
void Dispatcher::DidStartServiceWorkerContextOnWorkerThread(
int64_t service_worker_version_id,
const GURL& service_worker_scope,
const GURL& script_url) {
if (!ExtensionAPIEnabledForServiceWorkerScript(service_worker_scope,
script_url)) {
return;
}
// Even if the extension appears in the registry there's a timing issue where
// an extension that is reloaded could race with this (stale) async task being
// posted for a previously evaluated worker script.
// In that case we'd see this start notification for the previous worker
// instance that was quickly terminated (for example: a JS syntax error on
// script evaluation, but not limited to that) and we wouldn't have a
// ServiceWorkerData/ScriptContext to use later in this function.
// We'll get another DidStartServiceWorkerContextOnWorkerThread() when the
// next worker instance starts so returning early here shouldn't cause any
// issues.
if (base::FeatureList::IsEnabled(
kSpeculativeFixForNoExtensionInDidStartServiceWorkerContext) &&
service_worker_context_state ==
ServiceWorkerContextState::kUnloadedExtension) {
return;
}
// TODO(crbug.com/389971360) Remove this once the bug is fixed.
SCOPED_CRASH_KEY_NUMBER("extensions", "worker_context_state",
static_cast<int>(service_worker_context_state));
const int thread_id = content::WorkerThread::GetCurrentId();
CHECK_NE(thread_id, kMainThreadId);
auto* service_worker_data = WorkerThreadDispatcher::GetServiceWorkerData();
if (base::FeatureList::IsEnabled(
kSpeculativeFixForServiceWorkerDataInDidStartServiceWorkerContext)) {
// `service_worker_data` can be nullptr if the extension is already unloaded
// and the worker thread termination started.
//
// TODO(crbug.com/389971360) If this does seem to fix it, we should check
// `thread_state_` or `requested_to_terminate_` to confirm we're in
// termination when `service_worker_data` is false here.
if (service_worker_data) {
const ExtensionId& extension_id =
service_worker_data->context()->GetExtensionID();
CHECK(!extension_id.empty());
service_worker_data->GetServiceWorkerHost()->DidStartServiceWorkerContext(
extension_id, *service_worker_data->activation_sequence(),
service_worker_scope, service_worker_version_id, thread_id);
}
} else {
CHECK(service_worker_data);
const ExtensionId& extension_id =
service_worker_data->context()->GetExtensionID();
CHECK(!extension_id.empty());
service_worker_data->GetServiceWorkerHost()->DidStartServiceWorkerContext(
extension_id, *service_worker_data->activation_sequence(),
service_worker_scope, service_worker_version_id, thread_id);
}
}
void Dispatcher::WillDestroyServiceWorkerContextOnWorkerThread(
v8::Local<v8::Context> v8_context,
int64_t service_worker_version_id,
const GURL& service_worker_scope,
const GURL& script_url) {
// Note that using ExtensionAPIEnabledForServiceWorkerScript() won't work here
// as RendererExtensionRegistry might have already unloaded this extension.
// Use the existence of ServiceWorkerData as the source of truth instead.
if (auto* service_worker_data =
WorkerThreadDispatcher::GetServiceWorkerData()) {
service_worker_context_state = ServiceWorkerContextState::kDestroying;
const int thread_id = content::WorkerThread::GetCurrentId();
CHECK_NE(thread_id, kMainThreadId);
// TODO(lazyboy/devlin): Should this cleanup happen in a worker class, like
// WorkerThreadDispatcher? If so, we should move the initialization as well.
ScriptContext* script_context = service_worker_data->context();
const ExtensionId& extension_id =
service_worker_data->context()->GetExtensionID();
CHECK(!extension_id.empty());
NativeExtensionBindingsSystem* worker_bindings_system =
service_worker_data->bindings_system();
if (worker_bindings_system) {
worker_bindings_system->WillReleaseScriptContext(script_context);
service_worker_data->GetServiceWorkerHost()->DidStopServiceWorkerContext(
extension_id, *service_worker_data->activation_sequence(),
service_worker_scope, service_worker_version_id, thread_id);
}
// Note: we have to remove the context (and thus perform invalidation on
// the native handlers) prior to removing the worker data, which destroys
// the associated bindings system.
g_worker_script_context_set.Get().Remove(v8_context, script_url);
WorkerThreadDispatcher::Get()->RemoveWorkerData(service_worker_version_id);
// TODO(crbug.com/389971360) Remove this after the fix. If ServiceWorkerData
// in `WorkerThreadDispatcher` is removed, update the eligibility status so
// that we make sure if ServiceWorkerData is already removed or not in the
// crash at `DidStartServiceWorkerContextOnWorkerThread()`.
service_worker_context_state = ServiceWorkerContextState::kDestroyed;
} else {
// If extension APIs in service workers aren't enabled, we just need to
// remove the context.
g_worker_script_context_set.Get().Remove(v8_context, script_url);
// TODO(crbug.com/424476776) Remove this after the fix.
service_worker_context_state =
ServiceWorkerContextState::kDestroyedWithoutWorkerData;
}
ExtensionId extension_id =
RendererExtensionRegistry::Get()->GetExtensionOrAppIDByURL(script_url);
{
base::AutoLock lock(service_workers_paused_for_on_loaded_message_lock_);
service_workers_paused_for_on_loaded_message_.erase(extension_id);
}
}
void Dispatcher::DidCreateDocumentElement(blink::WebLocalFrame* frame) {
// Note: use GetEffectiveDocumentURLForContext() and not just
// frame->document()->url() so that this also injects the stylesheet on
// about:blank frames that are hosted in the extension process. (Even though
// this is used to determine whether to inject a stylesheet, we don't use
// GetEffectiveDocumentURLForInjection() because we inject based on whether
// it is an extension context, rather than based on the extension's injection
// permissions.)
GURL effective_document_url =
ScriptContext::GetEffectiveDocumentURLForContext(
frame, frame->GetDocument().Url(), true /* match_about_blank */);
const Extension* extension =
RendererExtensionRegistry::Get()->GetExtensionOrAppByURL(
effective_document_url);
if (extension &&
(extension->is_extension() || extension->is_platform_app())) {
int resource_id = extension->is_platform_app() ? IDR_PLATFORM_APP_CSS
: IDR_EXTENSION_FONTS_CSS;
std::string stylesheet =
ui::ResourceBundle::GetSharedInstance().LoadDataResourceString(
resource_id);
base::ReplaceFirstSubstringAfterOffset(
&stylesheet, 0, "$FONTFAMILY", system_font_family_);
base::ReplaceFirstSubstringAfterOffset(
&stylesheet, 0, "$FONTSIZE", system_font_size_);
// Blink doesn't let us define an additional user agent stylesheet, so
// we insert the default platform app or extension stylesheet into all
// documents that are loaded in each app or extension.
frame->GetDocument().InsertStyleSheet(WebString::FromUTF8(stylesheet));
}
// If this is an extension options page, and the extension has opted into
// using Chrome styles, then insert the Chrome extension stylesheet.
if (extension && extension->is_extension() &&
OptionsPageInfo::ShouldUseChromeStyle(extension) &&
effective_document_url == OptionsPageInfo::GetOptionsPage(extension)) {
std::string extension_css =
ui::ResourceBundle::GetSharedInstance().LoadDataResourceString(
IDR_EXTENSION_CSS);
frame->GetDocument().InsertStyleSheet(WebString::FromUTF8(extension_css));
}
}
void Dispatcher::RunScriptsAtDocumentStart(content::RenderFrame* render_frame) {
ExtensionFrameHelper* frame_helper = ExtensionFrameHelper::Get(render_frame);
if (!frame_helper)
return; // The frame is invisible to extensions.
frame_helper->RunScriptsAtDocumentStart();
// |frame_helper| and |render_frame| might be dead by now.
}
void Dispatcher::RunScriptsAtDocumentEnd(content::RenderFrame* render_frame) {
ExtensionFrameHelper* frame_helper = ExtensionFrameHelper::Get(render_frame);
if (!frame_helper)
return; // The frame is invisible to extensions.
frame_helper->RunScriptsAtDocumentEnd();
// |frame_helper| and |render_frame| might be dead by now.
}
void Dispatcher::RunScriptsAtDocumentIdle(content::RenderFrame* render_frame) {
ExtensionFrameHelper* frame_helper = ExtensionFrameHelper::Get(render_frame);
if (!frame_helper)
return; // The frame is invisible to extensions.
frame_helper->RunScriptsAtDocumentIdle();
// |frame_helper| and |render_frame| might be dead by now.
}
void Dispatcher::DispatchEventHelper(
const mojom::HostID& host_id,
const std::string& event_name,
const base::Value::List& event_args,
mojom::EventFilteringInfoPtr filtering_info) const {
script_context_set_->ForEach(
host_id, nullptr,
base::BindRepeating(
&NativeExtensionBindingsSystem::DispatchEventInContext,
base::Unretained(bindings_system_.get()), event_name,
std::cref(event_args), base::OwnedRef(std::move(filtering_info))));
}
void Dispatcher::InvokeModuleSystemMethod(content::RenderFrame* render_frame,
const ExtensionId& extension_id,
const std::string& module_name,
const std::string& function_name,
const base::Value::List& args) {
script_context_set_->ForEach(
GenerateHostIdFromExtensionId(extension_id), render_frame,
base::BindRepeating(&CallModuleMethod, module_name, function_name,
&args));
}
void Dispatcher::ExecuteDeclarativeScript(content::RenderFrame* render_frame,
int tab_id,
const ExtensionId& extension_id,
const std::string& script_id,
const GURL& url) {
TRACE_RENDERER_EXTENSION_EVENT("Dispatcher::ExecuteDeclarativeScript",
extension_id);
script_injection_manager_->ExecuteDeclarativeScript(
render_frame, tab_id, extension_id, script_id, url);
}
void Dispatcher::ExecuteCode(mojom::ExecuteCodeParamsPtr param,
mojom::LocalFrame::ExecuteCodeCallback callback,
content::RenderFrame* render_frame) {
TRACE_RENDERER_EXTENSION_EVENT("Dispatcher::ExecuteCode", param->host_id->id);
script_injection_manager_->HandleExecuteCode(
std::move(param), std::move(callback), render_frame);
}
void Dispatcher::RegisterMojoInterfaces(
blink::AssociatedInterfaceRegistry* associated_interfaces) {
// This base::Unretained() is safe, because:
// 1) the Dispatcher is a RenderThreadObserver and outlives the RenderThread.
// 2) |asscoiated_interfaces| is owned by the RenderThread.
// As well the Dispatcher is owned by the
// ExtensionsRendererClient, which in turn is a leaky LazyInstance (and thus
// never deleted).
associated_interfaces->AddInterface<mojom::Renderer>(base::BindRepeating(
&Dispatcher::OnRendererAssociatedRequest, base::Unretained(this)));
associated_interfaces->AddInterface<mojom::EventDispatcher>(
base::BindRepeating(&Dispatcher::OnEventDispatcherRequest,
base::Unretained(this)));
}
void Dispatcher::UnregisterMojoInterfaces(
blink::AssociatedInterfaceRegistry* associated_interfaces) {
associated_interfaces->RemoveInterface(mojom::Renderer::Name_);
associated_interfaces->RemoveInterface(mojom::EventDispatcher::Name_);
}
void Dispatcher::OnRendererAssociatedRequest(
mojo::PendingAssociatedReceiver<mojom::Renderer> receiver) {
receiver_.Bind(std::move(receiver));
}
void Dispatcher::OnEventDispatcherRequest(
mojo::PendingAssociatedReceiver<mojom::EventDispatcher> dispatcher) {
CHECK(!dispatcher_.is_bound());
dispatcher_.Bind(std::move(dispatcher));
dispatcher_.reset_on_disconnect();
}
void Dispatcher::ActivateExtension(const ExtensionId& extension_id) {
TRACE_RENDERER_EXTENSION_EVENT("Dispatcher::ActivateExtension", extension_id);
CHECK(!extension_id.empty());
const Extension* extension =
RendererExtensionRegistry::Get()->GetByID(extension_id);
if (!extension) {
// Extension was activated but was never loaded. This probably means that
// the renderer failed to load it (or the browser failed to tell us when it
// did). Failures shouldn't happen, but instead of crashing there (which
// executes on all renderers) just log an error and dump without crashing.
std::string& error = extension_load_errors_[extension_id];
char minidump[256];
base::debug::Alias(&minidump);
base::SpanPrintf(minidump, "e::dispatcher:%s:%s", extension_id.c_str(),
error.c_str());
LOG(ERROR) << extension_id << " was never loaded: " << error;
base::debug::DumpWithoutCrashing();
return;
}
// It's possible that the same extension might generate multiple activation
// messages, for example from an extension background page followed by an
// extension subframe on a regular tab. Ensure that any given extension is
// only activated once.
if (IsExtensionActive(extension_id))
return;
active_extension_ids_.insert(extension_id);
if (activity_logging_enabled_) {
DOMActivityLogger::AttachToWorld(DOMActivityLogger::kMainWorldId,
extension_id);
}
InitOriginPermissions(extension);
UpdateActiveExtensions();
}
void Dispatcher::LoadExtensions(
std::vector<mojom::ExtensionLoadedParamsPtr> loaded_extensions) {
for (auto& param : loaded_extensions) {
std::u16string error;
ExtensionId id = param->id;
std::optional<base::UnguessableToken> worker_activation_token =
param->worker_activation_token;
SetCurrentUserScriptAllowedState(kRendererProfileId, id,
param->user_scripts_allowed);
scoped_refptr<const Extension> extension =
ConvertToExtension(std::move(param), kRendererProfileId, &error);
if (!extension.get()) {
// Note: in tests |param.id| has been observed to be empty (see comment
// just below) so this isn't all that reliable.
NOTREACHED() << error;
}
RendererExtensionRegistry* extension_registry =
RendererExtensionRegistry::Get();
// The order of setting the token before inserting the extension is
// intentional so that DidInitializeServiceWorkerContextOnWorkerThread()
// will pause the worker evaluation
// (WillEvaluateServiceWorkerOnWorkerThread()) from running before we have
// these two necessary pieces of information for setting up the extension
// bindings.
if (worker_activation_token.has_value()) {
extension_registry->SetWorkerActivationToken(
extension, std::move(*worker_activation_token));
}
// TODO(jlulejian): This is deliberately a CHECK because other parts of the
// renderer assume that an extension has been loaded (e.g. specifically
// worker script evaluation process). If this fails, other CHECK()s and
// logic will fail too.
CHECK(extension_registry->Insert(extension));
unloaded_extensions_.erase(extension->id());
ExtensionsRendererClient::Get()->OnExtensionLoaded(*extension);
// Resume service worker if it is suspended.
{
base::AutoLock lock(service_workers_paused_for_on_loaded_message_lock_);
auto it =
service_workers_paused_for_on_loaded_message_.find(extension->id());
if (it != service_workers_paused_for_on_loaded_message_.end()) {
// It's possible that LoadExtensions is called multiple times for the
// same extension before the worker thread has a chance to run the
// ResumeEvaluationOnWorkerThread task. In that case, the task_runner
// will have already been moved, so we need to check if it's valid.
if (it->second->task_runner) {
scoped_refptr<base::SingleThreadTaskRunner> task_runner =
std::move(it->second->task_runner);
// Using base::Unretained() should be fine as this won't get
// destructed.
task_runner->PostTask(
FROM_HERE,
base::BindOnce(&Dispatcher::ResumeEvaluationOnWorkerThread,
base::Unretained(this), extension->id()));
}
}
}
}
// Update the available bindings for all contexts. These may have changed if
// an externally_connectable extension was loaded that can connect to an
// open webpage.
UpdateAllBindings(/*api_permissions_changed=*/false);
}
void Dispatcher::UnloadExtension(const ExtensionId& extension_id) {
TRACE_RENDERER_EXTENSION_EVENT("Dispatcher::UnloadExtension", extension_id);
CHECK(!extension_id.empty());
// An extension should be in the registry if we are unloading it. Otherwise we
// might be doing something out of the expected order.
CHECK(RendererExtensionRegistry::Get()->Remove(extension_id));
unloaded_extensions_.insert(extension_id);
ExtensionsRendererClient::Get()->OnExtensionUnloaded(extension_id);
bindings_system_->OnExtensionRemoved(extension_id);
active_extension_ids_.erase(extension_id);
user_script_set_manager_->OnExtensionUnloaded(extension_id);
script_injection_manager_->OnExtensionUnloaded(extension_id);
// If the extension is later reloaded with a different set of permissions,
// we'd like it to get a new isolated world ID, so that it can pick up the
// changed origin allowlist.
IsolatedWorldManager::GetInstance().RemoveIsolatedWorlds(extension_id);
// Inform the bindings system that the contexts will be removed to allow time
// to clear out context-specific data, and then remove the contexts
// themselves.
script_context_set_->ForEach(
GenerateHostIdFromExtensionId(extension_id), nullptr,
base::BindRepeating(
&NativeExtensionBindingsSystem::WillReleaseScriptContext,
base::Unretained(bindings_system_.get())));
script_context_set_->OnExtensionUnloaded(extension_id);
// Update the available bindings for the remaining contexts. These may have
// changed if an externally_connectable extension is unloaded and a webpage
// is no longer accessible.
UpdateAllBindings(/*api_permissions_changed=*/false);
// Invalidates the messages map for the extension in case the extension is
// reloaded with a new messages map.
SharedL10nMap::GetInstance().EraseMessagesMap(extension_id);
// Update the origin access map so that any content scripts injected no longer
// have dedicated allow/block lists for extra origins.
WebSecurityPolicy::ClearOriginAccessListForOrigin(
Extension::GetBaseURLFromExtensionId(extension_id));
// We don't do anything with existing platform-app stylesheets. They will
// stay resident, but the URL pattern corresponding to the unloaded
// extension's URL just won't match anything anymore.
}
void Dispatcher::SuspendExtension(
const ExtensionId& extension_id,
mojom::Renderer::SuspendExtensionCallback callback) {
TRACE_RENDERER_EXTENSION_EVENT("Dispatcher::SuspendExtension", extension_id);
CHECK(!extension_id.empty());
// Dispatch the suspend event. This doesn't go through the standard event
// dispatch machinery because it requires special handling. We need to let
// the browser know when we are starting and stopping the event dispatch, so
// that it still considers the extension idle despite any activity the suspend
// event creates.
DispatchEventHelper(GenerateHostIdFromExtensionId(extension_id),
kOnSuspendEvent, base::Value::List(), nullptr);
std::move(callback).Run();
}
void Dispatcher::CancelSuspendExtension(const ExtensionId& extension_id) {
CHECK(!extension_id.empty());
DispatchEventHelper(GenerateHostIdFromExtensionId(extension_id),
kOnSuspendCanceledEvent, base::Value::List(), nullptr);
}
void Dispatcher::SetSystemFont(const std::string& font_family,
const std::string& font_size) {
system_font_family_ = font_family;
system_font_size_ = font_size;
}
void Dispatcher::SetWebViewPartitionID(const std::string& partition_id) {
// |webview_partition_id_| cannot be changed once set.
CHECK(!webview_partition_id_ || webview_partition_id_ == partition_id);
webview_partition_id_ = partition_id;
}
void Dispatcher::SetScriptingAllowlist(
const std::vector<ExtensionId>& extension_ids) {
CHECK(std::all_of(
extension_ids.begin(), extension_ids.end(),
[](const ExtensionId& extension_id) { return !extension_id.empty(); }));
ExtensionsClient::Get()->SetScriptingAllowlist(extension_ids);
}
void Dispatcher::UpdateDefaultPolicyHostRestrictions(
URLPatternSet default_policy_blocked_hosts,
URLPatternSet default_policy_allowed_hosts) {
PermissionsData::SetDefaultPolicyHostRestrictions(
kRendererProfileId, default_policy_blocked_hosts,
default_policy_allowed_hosts);
// Update blink host permission allowlist exceptions for all loaded
// extensions.
for (const ExtensionId& extension_id :
RendererExtensionRegistry::Get()->GetIDs()) {
const Extension* extension =
RendererExtensionRegistry::Get()->GetByID(extension_id);
if (extension->permissions_data()->UsesDefaultPolicyHostRestrictions()) {
UpdateOriginPermissions(*extension);
}
}
UpdateAllBindings(/*api_permissions_changed=*/false);
}
void Dispatcher::UpdateUserScriptWorlds(
std::vector<mojom::UserScriptWorldInfoPtr> infos) {
for (const auto& info : infos) {
IsolatedWorldManager::GetInstance().SetUserScriptWorldProperties(
info->extension_id, info->world_id, info->csp, info->enable_messaging);
}
}
void Dispatcher::ClearUserScriptWorldConfig(
const ExtensionId& extension_id,
const std::optional<std::string>& world_id) {
CHECK(!extension_id.empty());
IsolatedWorldManager::GetInstance().ClearUserScriptWorldProperties(
extension_id, world_id);
}
void Dispatcher::UpdateUserHostRestrictions(URLPatternSet user_blocked_hosts,
URLPatternSet user_allowed_hosts) {
PermissionsData::SetUserHostRestrictions(kRendererProfileId,
std::move(user_blocked_hosts),
std::move(user_allowed_hosts));
// TODO(crbug.com/40803363): Update origin permissions and bindings as
// we do with policy host restrictions above. Currently, user host
// restrictions aren't used in the origin access allowlist, so there's no
// point in updating it.
}
void Dispatcher::UpdateTabSpecificPermissions(const ExtensionId& extension_id,
URLPatternSet new_hosts,
int tab_id,
bool update_origin_allowlist) {
CHECK(!extension_id.empty());
const Extension* extension =
RendererExtensionRegistry::Get()->GetByID(extension_id);
if (!extension)
return;
extension->permissions_data()->UpdateTabSpecificPermissions(
tab_id, PermissionSet(APIPermissionSet(), ManifestPermissionSet(),
new_hosts.Clone(), new_hosts.Clone()));
if (update_origin_allowlist)
UpdateOriginPermissions(*extension);
}
void Dispatcher::UpdateUserScripts(
base::ReadOnlySharedMemoryRegion shared_memory,
mojom::HostIDPtr host_id) {
TRACE_RENDERER_EXTENSION_EVENT("Dispatcher::UpdateUserScripts", host_id->id);
user_script_set_manager_->OnUpdateUserScripts(std::move(shared_memory),
*host_id);
}
void Dispatcher::ClearTabSpecificPermissions(
const std::vector<ExtensionId>& extension_ids,
int tab_id,
bool update_origin_allowlist) {
for (const ExtensionId& id : extension_ids) {
CHECK(!id.empty());
const Extension* extension = RendererExtensionRegistry::Get()->GetByID(id);
if (extension) {
extension->permissions_data()->ClearTabSpecificPermissions(tab_id);
if (update_origin_allowlist)
UpdateOriginPermissions(*extension);
}
}
}
void Dispatcher::WatchPages(const std::vector<std::string>& css_selectors) {
DCHECK(content_watcher_);
content_watcher_->OnWatchPages(css_selectors);
}
void Dispatcher::DispatchEvent(mojom::DispatchEventParamsPtr params,
base::Value::List event_args,
DispatchEventCallback callback) {
CHECK_EQ(params->worker_thread_id, kMainThreadId);
CHECK(params->host_id);
content::RenderFrame* background_frame = nullptr;
if (params->host_id->type == mojom::HostID::HostType::kExtensions) {
background_frame = ExtensionFrameHelper::GetBackgroundPageFrame(
GenerateExtensionIdFromHostId(*params->host_id));
}
ScriptContext* background_context = nullptr;
if (background_frame) {
background_context =
ScriptContextSet::GetMainWorldContextForFrame(background_frame);
}
bool event_has_listener_in_background_context =
background_context && bindings_system_->HasEventListenerInContext(
params->event_name, background_context);
// Synthesize a user gesture if this was in response to user action; this is
// necessary if the gesture was e.g. by clicking on the extension toolbar
// icon, context menu entry, etc.
//
// This will only add an active user gesture for the background page, so any
// listeners in different frames (like a popup or tab) won't be able to use
// the user gesture. This is intentional, since frames other than the
// background page should have their own user gestures, such as through button
// clicks.
if (params->is_user_gesture && background_context &&
event_has_listener_in_background_context) {
background_frame->GetWebFrame()->NotifyUserActivation(
blink::mojom::UserActivationNotificationType::kExtensionEvent);
}
DispatchEventHelper(*params->host_id, params->event_name, event_args,
std::move(params->filtering_info));
std::move(callback).Run(event_has_listener_in_background_context);
}
void Dispatcher::SetDeveloperMode(bool current_developer_mode) {
SetCurrentDeveloperMode(kRendererProfileId, current_developer_mode);
// Since this affects the availability of different APIs, we indicate that
// api permissions may have changed.
UpdateAllBindings(/*api_permissions_changed=*/true);
}
void Dispatcher::SetUserScriptsAllowed(const ExtensionId& extension_id,
bool enabled) {
CHECK(!extension_id.empty());
SetCurrentUserScriptAllowedState(kRendererProfileId, extension_id, enabled);
const Extension* extension =
RendererExtensionRegistry::Get()->GetByID(extension_id);
if (!extension) {
return;
}
UpdateBindingsForExtension(*extension);
}
void Dispatcher::SetSessionInfo(version_info::Channel channel,
mojom::FeatureSessionType session_type) {
SetCurrentChannel(channel);
SetCurrentFeatureSessionType(session_type);
}
void Dispatcher::ShouldSuspend(ShouldSuspendCallback callback) {
std::move(callback).Run();
}
void Dispatcher::TransferBlobs(TransferBlobsCallback callback) {
std::move(callback).Run();
}
void Dispatcher::UpdatePermissions(const ExtensionId& extension_id,
PermissionSet active_permissions,
PermissionSet withheld_permissions,
URLPatternSet policy_blocked_hosts,
URLPatternSet policy_allowed_hosts,
bool uses_default_policy_host_restrictions) {
CHECK(!extension_id.empty());
const Extension* extension =
RendererExtensionRegistry::Get()->GetByID(extension_id);
if (!extension)
return;
if (uses_default_policy_host_restrictions) {
extension->permissions_data()->SetUsesDefaultHostRestrictions();
} else {
extension->permissions_data()->SetPolicyHostRestrictions(
policy_blocked_hosts, policy_allowed_hosts);
}
extension->permissions_data()->SetPermissions(
std::make_unique<const PermissionSet>(std::move(active_permissions)),
std::make_unique<const PermissionSet>(std::move(withheld_permissions)));
UpdateOriginPermissions(*extension);
UpdateBindingsForExtension(*extension);
}
void Dispatcher::SetActivityLoggingEnabled(bool enabled) {
activity_logging_enabled_ = enabled;
if (enabled) {
for (const ExtensionId& id : active_extension_ids_) {
DOMActivityLogger::AttachToWorld(DOMActivityLogger::kMainWorldId, id);
}
}
script_injection_manager_->set_activity_logging_enabled(enabled);
user_script_set_manager_->set_activity_logging_enabled(enabled);
}
void Dispatcher::OnUserScriptsUpdated(const mojom::HostID& changed_host) {
// Update the set of active extensions if `changed_host` is an extension and
// it has scripts.
if (changed_host.type == mojom::HostID::HostType::kExtensions)
UpdateActiveExtensions();
}
ScriptContextSetIterable* Dispatcher::GetScriptContextSet() {
return script_context_set_iterator();
}
void Dispatcher::UpdateActiveExtensions() {
std::set<ExtensionId> active_extensions = active_extension_ids_;
user_script_set_manager_->GetAllActiveExtensionIds(&active_extensions);
// In single-process mode, the browser process reports the active extensions.
if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
::switches::kSingleProcess)) {
crash_keys::SetActiveExtensions(active_extensions);
}
}
void Dispatcher::InitOriginPermissions(const Extension* extension) {
UpdateOriginPermissions(*extension);
}
void Dispatcher::UpdateOriginPermissions(const Extension& extension) {
// Remove all old patterns associated with this extension.
WebSecurityPolicy::ClearOriginAccessListForOrigin(extension.url());
std::vector<network::mojom::CorsOriginPatternPtr> allow_list =
CreateCorsOriginAccessAllowList(extension);
ExtensionsClient::Get()->AddOriginAccessPermissions(
extension, IsExtensionActive(extension.id()), &allow_list);
for (const auto& entry : allow_list) {
WebSecurityPolicy::AddOriginAccessAllowListEntry(
extension.url(), WebString::FromUTF8(entry->protocol),
WebString::FromUTF8(entry->domain), entry->port,
entry->domain_match_mode, entry->port_match_mode, entry->priority);
}
for (const auto& entry : CreateCorsOriginAccessBlockList(extension)) {
WebSecurityPolicy::AddOriginAccessBlockListEntry(
extension.url(), WebString::FromUTF8(entry->protocol),
WebString::FromUTF8(entry->domain), entry->port,
entry->domain_match_mode, entry->port_match_mode, entry->priority);
}
}
void Dispatcher::EnableCustomElementAllowlist() {
blink::WebCustomElement::AddEmbedderCustomElementName("appview");
blink::WebCustomElement::AddEmbedderCustomElementName("extensionoptions");
blink::WebCustomElement::AddEmbedderCustomElementName("webview");
for (const auto& api_provider : api_providers_) {
api_provider->EnableCustomElementAllowlist();
}
}
void Dispatcher::UpdateAllBindings(bool api_permissions_changed) {
bindings_system_->UpdateBindings(ExtensionId() /* all contexts */,
api_permissions_changed,
script_context_set_iterator());
WorkerThreadDispatcher::Get()->UpdateAllServiceWorkerBindings();
}
void Dispatcher::UpdateBindingsForExtension(const Extension& extension) {
bindings_system_->UpdateBindings(extension.id(),
true /* permissions_changed */,
script_context_set_iterator());
// Update Service Worker bindings too, if applicable.
if (!BackgroundInfo::IsServiceWorkerBased(&extension))
return;
const bool updated =
WorkerThreadDispatcher::Get()->UpdateBindingsForWorkers(extension.id());
// TODO(lazyboy): When can this fail?
DCHECK(updated) << "Some or all workers failed to update bindings.";
}
// NOTE: please use the naming convention "foo_natives" for these.
void Dispatcher::RegisterNativeHandlers(
ModuleSystem* module_system,
ScriptContext* context,
NativeExtensionBindingsSystem* bindings_system,
V8SchemaRegistry* v8_schema_registry) {
for (const auto& api_provider : api_providers_) {
api_provider->RegisterNativeHandlers(module_system, bindings_system,
v8_schema_registry, context);
}
}
void Dispatcher::PopulateSourceMap() {
for (const auto& api_provider : api_providers_) {
api_provider->PopulateSourceMap(&source_map_);
}
}
bool Dispatcher::IsWithinPlatformApp() {
for (auto iter = active_extension_ids_.begin();
iter != active_extension_ids_.end(); ++iter) {
const Extension* extension =
RendererExtensionRegistry::Get()->GetByID(*iter);
if (extension && extension->is_platform_app())
return true;
}
return false;
}
#if BUILDFLAG(ENABLE_GUEST_VIEW)
void Dispatcher::RequireGuestViewModules(ScriptContext* context) {
ModuleSystem* module_system = context->module_system();
bool requires_guest_view_module = false;
// This determines whether to register error-providing custom elements for the
// GuestView types that are not available. We only do this in contexts where
// it is possible to gain access to a given GuestView element by declaring the
// necessary permission in a manifest file. We don't want to define
// error-providing elements in other extension contexts as the names could
// collide with names used in the extension. Also, WebUIs may be allowlisted
// to use GuestViews, but we don't define the error-providing elements in this
// case.
const bool is_platform_app =
context->context_type() == mojom::ContextType::kPrivilegedExtension &&
!context->IsForServiceWorker() && context->extension() &&
context->extension()->is_platform_app();
// The webview permission is also available to internal allowlisted
// extensions, but not to extensions in general.
const bool web_view_permission_exists = is_platform_app;
// TODO(fsamuel): Eagerly calling Require on context startup is expensive.
// It would be better if there were a light way of detecting when a webview
// or appview is created and only then set up the infrastructure.
#if BUILDFLAG(ENABLE_PLATFORM_APPS)
const bool app_view_permission_exists = is_platform_app;
// Require AppView.
if (context->GetAvailability("appViewEmbedderInternal").is_available()) {
requires_guest_view_module = true;
module_system->Require("appViewElement");
} else if (app_view_permission_exists) {
module_system->Require("appViewDeny");
}
#endif
// Require ExtensionOptions.
if (context->GetAvailability("extensionOptionsInternal").is_available()) {
requires_guest_view_module = true;
module_system->Require("extensionOptionsElement");
}
// Require WebView.
if (context->GetAvailability("webViewInternal").is_available()) {
requires_guest_view_module = true;
for (const auto& api_provider : api_providers_) {
api_provider->RequireWebViewModules(context);
}
} else if (web_view_permission_exists) {
module_system->Require("webViewDeny");
}
if (requires_guest_view_module) {
// If a frame has guest view custom elements defined, we need to make sure
// the custom elements are also defined in subframes. The subframes will
// need a scripting context which we will need to forcefully create if
// the subframe doesn't otherwise have any scripts.
context->web_frame()
->View()
->GetSettings()
->SetForceMainWorldInitialization(true);
}
}
#endif // BUILDFLAG(ENABLE_GUEST_VIEW)
std::unique_ptr<NativeExtensionBindingsSystem> Dispatcher::CreateBindingsSystem(
NativeExtensionBindingsSystem::Delegate* delegate,
std::unique_ptr<IPCMessageSender> ipc_sender) {
auto bindings_system = std::make_unique<NativeExtensionBindingsSystem>(
delegate, std::move(ipc_sender));
for (const auto& api_provider : api_providers_) {
api_provider->AddBindingsSystemHooks(this, bindings_system.get());
}
return bindings_system;
}
void Dispatcher::ResumeEvaluationOnWorkerThread(
const ExtensionId& extension_id) {
base::AutoLock lock(service_workers_paused_for_on_loaded_message_lock_);
auto it = service_workers_paused_for_on_loaded_message_.find(extension_id);
if (it != service_workers_paused_for_on_loaded_message_.end()) {
blink::WebServiceWorkerContextProxy* context_proxy =
it->second->context_proxy;
context_proxy->ResumeEvaluation();
service_workers_paused_for_on_loaded_message_.erase(it);
}
}
} // namespace extensions