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5656ba3a2d
For non-Window globals we pass `true` for `aInitStandardClasses` which results in `CreateGlobal` calling `JS::InitRealmStandardClasses`. This affects performance and memory usage and likely isn't necessary. It's also nicer to not have this difference in behavior. Differential Revision: https://phabricator.services.mozilla.com/D186216
126 lines
4.1 KiB
C++
126 lines
4.1 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsGlobalWindowInner.h"
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#include "nsIGlobalObject.h"
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#include "xpcpublic.h"
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#include "js/TypeDecls.h"
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#include "mozilla/dom/Document.h"
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#include "mozilla/dom/BindingDeclarations.h"
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#include "mozilla/dom/ModuleLoader.h"
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#include "mozilla/dom/ShadowRealmGlobalScope.h"
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#include "mozilla/dom/ShadowRealmGlobalScopeBinding.h"
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#include "js/loader/ModuleLoaderBase.h"
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using namespace JS::loader;
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namespace mozilla::dom {
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NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(ShadowRealmGlobalScope, mModuleLoader,
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mCreatingGlobal)
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NS_IMPL_CYCLE_COLLECTING_ADDREF(ShadowRealmGlobalScope)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(ShadowRealmGlobalScope)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ShadowRealmGlobalScope)
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NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
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NS_INTERFACE_MAP_ENTRY(nsISupports)
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NS_INTERFACE_MAP_ENTRY(nsIGlobalObject)
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NS_INTERFACE_MAP_ENTRY(ShadowRealmGlobalScope)
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NS_INTERFACE_MAP_END
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JSObject* NewShadowRealmGlobal(JSContext* aCx, JS::RealmOptions& aOptions,
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JSPrincipals* aPrincipals,
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JS::Handle<JSObject*> aGlobalObj) {
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JS::Rooted<JSObject*> reflector(aCx);
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{
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RefPtr<ShadowRealmGlobalScope> scope;
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GlobalObject global(aCx, aGlobalObj);
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nsCOMPtr<nsIGlobalObject> nsGlobal =
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do_QueryInterface(global.GetAsSupports());
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MOZ_ASSERT(nsGlobal);
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scope = new ShadowRealmGlobalScope(nsGlobal);
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ShadowRealmGlobalScope_Binding::Wrap(aCx, scope, scope, aOptions,
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aPrincipals, &reflector);
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}
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return reflector;
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}
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static nsIGlobalObject* FindEnclosingNonShadowRealmGlobal(
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ShadowRealmGlobalScope* scope) {
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nsCOMPtr<nsIGlobalObject> global = scope->GetCreatingGlobal();
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do {
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nsCOMPtr<ShadowRealmGlobalScope> shadowRealmGlobalScope =
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do_QueryInterface(global);
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if (!shadowRealmGlobalScope) {
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break;
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}
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// Our global was a ShadowRealmGlobal; that's a problem, as we can't find a
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// window or worker global associated with a ShadowRealmGlobal... so we
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// continue following the chain.
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//
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// This will happen if you have nested ShadowRealms.
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global = shadowRealmGlobalScope->GetCreatingGlobal();
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} while (true);
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return global;
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}
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ModuleLoaderBase* ShadowRealmGlobalScope::GetModuleLoader(JSContext* aCx) {
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if (mModuleLoader) {
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return mModuleLoader;
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}
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// Note: if this fails, we don't need to report an exception, as one will be
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// reported by ModuleLoaderBase::GetCurrentModuleLoader.
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// Don't bother asking the ShadowRealmGlobal itself for a host object to get a
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// module loader from, instead, delegate to the enclosing global of the shadow
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// realm
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nsCOMPtr<nsIGlobalObject> global = FindEnclosingNonShadowRealmGlobal(this);
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MOZ_RELEASE_ASSERT(global);
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JSObject* object = global->GetGlobalJSObject();
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MOZ_ASSERT(object);
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// Currently Workers will never get here, because dynamic import is disabled
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// in Worker context, and so importValue will throw before we get here.
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//
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// See https://bugzilla.mozilla.org/show_bug.cgi?id=1247687 and
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// https://bugzilla.mozilla.org/show_bug.cgi?id=1772162
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nsGlobalWindowInner* window = xpc::WindowGlobalOrNull(object);
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if (!window) {
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return nullptr;
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}
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RefPtr<Document> doc = window->GetExtantDoc();
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if (!doc) {
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return nullptr;
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}
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ScriptLoader* scriptLoader = doc->ScriptLoader();
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mModuleLoader = new ModuleLoader(scriptLoader, this, ModuleLoader::Normal);
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// Register the shadow realm module loader for tracing and ownership.
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scriptLoader->RegisterShadowRealmModuleLoader(
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static_cast<ModuleLoader*>(mModuleLoader.get()));
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return mModuleLoader;
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}
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bool IsShadowRealmGlobal(JSObject* aObject) {
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return IS_INSTANCE_OF(ShadowRealmGlobalScope, aObject);
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}
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} // namespace mozilla::dom
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