Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

3 files changed, 436 insertions, 0 deletions

diff --git a/dom/worklet/loader/WorkletModuleLoader.cpp b/dom/worklet/loader/WorkletModuleLoader.cpp
new file mode 100644
index 0000000000..34353107f8
--- /dev/null
+++ b/dom/worklet/loader/WorkletModuleLoader.cpp
@@ -0,0 +1,297 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "WorkletModuleLoader.h"
+
+#include "js/CompileOptions.h"  // JS::InstantiateOptions
+#include "js/experimental/JSStencil.h"  // JS::CompileModuleScriptToStencil, JS::InstantiateModuleStencil
+#include "js/loader/ModuleLoadRequest.h"
+#include "mozilla/ScopeExit.h"
+#include "mozilla/Unused.h"
+#include "mozilla/dom/StructuredCloneHolder.h"
+#include "mozilla/dom/Worklet.h"
+#include "mozilla/dom/WorkletFetchHandler.h"
+#include "nsStringBundle.h"
+
+using JS::loader::ModuleLoadRequest;
+using JS::loader::ResolveError;
+
+namespace mozilla::dom::loader {
+
+//////////////////////////////////////////////////////////////
+// WorkletScriptLoader
+//////////////////////////////////////////////////////////////
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(WorkletScriptLoader)
+NS_INTERFACE_MAP_END
+
+NS_IMPL_CYCLE_COLLECTION(WorkletScriptLoader)
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(WorkletScriptLoader)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(WorkletScriptLoader)
+
+//////////////////////////////////////////////////////////////
+// WorkletModuleLoader
+//////////////////////////////////////////////////////////////
+
+NS_IMPL_ADDREF_INHERITED(WorkletModuleLoader, ModuleLoaderBase)
+NS_IMPL_RELEASE_INHERITED(WorkletModuleLoader, ModuleLoaderBase)
+
+NS_IMPL_CYCLE_COLLECTION_INHERITED(WorkletModuleLoader, ModuleLoaderBase,
+                                   mFetchingRequests)
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(WorkletModuleLoader)
+NS_INTERFACE_MAP_END_INHERITING(ModuleLoaderBase)
+
+WorkletModuleLoader::WorkletModuleLoader(WorkletScriptLoader* aScriptLoader,
+                                         nsIGlobalObject* aGlobalObject)
+    : ModuleLoaderBase(aScriptLoader, aGlobalObject,
+                       GetCurrentSerialEventTarget()) {
+  // This should be constructed on a worklet thread.
+  MOZ_ASSERT(!NS_IsMainThread());
+}
+
+already_AddRefed<ModuleLoadRequest> WorkletModuleLoader::CreateStaticImport(
+    nsIURI* aURI, ModuleLoadRequest* aParent) {
+  const nsMainThreadPtrHandle<WorkletFetchHandler>& handlerRef =
+      aParent->GetWorkletLoadContext()->GetHandlerRef();
+  RefPtr<WorkletLoadContext> loadContext = new WorkletLoadContext(handlerRef);
+
+  // https://html.spec.whatwg.org/multipage/webappapis.html#fetch-the-descendants-of-a-module-script
+  // Step 11. Perform the internal module script graph fetching procedure
+  //
+  // https://html.spec.whatwg.org/multipage/webappapis.html#internal-module-script-graph-fetching-procedure
+  // Step 5. Fetch a single module script with referrer is referringScript's
+  // base URL,
+  nsIURI* referrer = aParent->mURI;
+  RefPtr<ModuleLoadRequest> request = new ModuleLoadRequest(
+      aURI, aParent->mFetchOptions, SRIMetadata(), referrer, loadContext,
+      false, /* is top level */
+      false, /* is dynamic import */
+      this, aParent->mVisitedSet, aParent->GetRootModule());
+
+  request->mURL = request->mURI->GetSpecOrDefault();
+  return request.forget();
+}
+
+already_AddRefed<ModuleLoadRequest> WorkletModuleLoader::CreateDynamicImport(
+    JSContext* aCx, nsIURI* aURI, LoadedScript* aMaybeActiveScript,
+    JS::Handle<JS::Value> aReferencingPrivate, JS::Handle<JSString*> aSpecifier,
+    JS::Handle<JSObject*> aPromise) {
+  return nullptr;
+}
+
+bool WorkletModuleLoader::CanStartLoad(ModuleLoadRequest* aRequest,
+                                       nsresult* aRvOut) {
+  return true;
+}
+
+nsresult WorkletModuleLoader::StartFetch(ModuleLoadRequest* aRequest) {
+  InsertRequest(aRequest->mURI, aRequest);
+
+  RefPtr<StartFetchRunnable> runnable =
+      new StartFetchRunnable(aRequest->GetWorkletLoadContext()->GetHandlerRef(),
+                             aRequest->mURI, aRequest->mReferrer);
+  NS_DispatchToMainThread(runnable.forget());
+  return NS_OK;
+}
+
+nsresult WorkletModuleLoader::CompileFetchedModule(
+    JSContext* aCx, JS::Handle<JSObject*> aGlobal, JS::CompileOptions& aOptions,
+    ModuleLoadRequest* aRequest, JS::MutableHandle<JSObject*> aModuleScript) {
+  RefPtr<JS::Stencil> stencil;
+  MOZ_ASSERT(aRequest->IsTextSource());
+
+  MaybeSourceText maybeSource;
+  nsresult rv = aRequest->GetScriptSource(aCx, &maybeSource);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  auto compile = [&](auto& source) {
+    return JS::CompileModuleScriptToStencil(aCx, aOptions, source);
+  };
+  stencil = maybeSource.mapNonEmpty(compile);
+
+  if (!stencil) {
+    return NS_ERROR_FAILURE;
+  }
+
+  JS::InstantiateOptions instantiateOptions(aOptions);
+  aModuleScript.set(
+      JS::InstantiateModuleStencil(aCx, instantiateOptions, stencil));
+  return aModuleScript ? NS_OK : NS_ERROR_FAILURE;
+}
+
+// AddModuleResultRunnable is a Runnable which will notify the result of
+// Worklet::AddModule on the main thread.
+class AddModuleResultRunnable final : public Runnable {
+ public:
+  explicit AddModuleResultRunnable(
+      const nsMainThreadPtrHandle<WorkletFetchHandler>& aHandlerRef,
+      bool aSucceeded)
+      : Runnable("Worklet::AddModuleResultRunnable"),
+        mHandlerRef(aHandlerRef),
+        mSucceeded(aSucceeded) {
+    MOZ_ASSERT(!NS_IsMainThread());
+  }
+
+  ~AddModuleResultRunnable() = default;
+
+  NS_IMETHOD
+  Run() override;
+
+ private:
+  nsMainThreadPtrHandle<WorkletFetchHandler> mHandlerRef;
+  bool mSucceeded;
+};
+
+NS_IMETHODIMP
+AddModuleResultRunnable::Run() {
+  MOZ_ASSERT(NS_IsMainThread());
+  if (mSucceeded) {
+    mHandlerRef->ExecutionSucceeded();
+  } else {
+    mHandlerRef->ExecutionFailed();
+  }
+
+  return NS_OK;
+}
+
+class AddModuleThrowErrorRunnable final : public Runnable,
+                                          public StructuredCloneHolder {
+ public:
+  explicit AddModuleThrowErrorRunnable(
+      const nsMainThreadPtrHandle<WorkletFetchHandler>& aHandlerRef)
+      : Runnable("Worklet::AddModuleThrowErrorRunnable"),
+        StructuredCloneHolder(CloningSupported, TransferringNotSupported,
+                              StructuredCloneScope::SameProcess),
+        mHandlerRef(aHandlerRef) {
+    MOZ_ASSERT(!NS_IsMainThread());
+  }
+
+  ~AddModuleThrowErrorRunnable() = default;
+
+  NS_IMETHOD
+  Run() override;
+
+ private:
+  nsMainThreadPtrHandle<WorkletFetchHandler> mHandlerRef;
+};
+
+NS_IMETHODIMP
+AddModuleThrowErrorRunnable::Run() {
+  MOZ_ASSERT(NS_IsMainThread());
+
+  nsCOMPtr<nsIGlobalObject> global =
+      do_QueryInterface(mHandlerRef->mWorklet->GetParentObject());
+  MOZ_ASSERT(global);
+
+  AutoJSAPI jsapi;
+  if (NS_WARN_IF(!jsapi.Init(global))) {
+    mHandlerRef->ExecutionFailed();
+    return NS_ERROR_FAILURE;
+  }
+
+  JSContext* cx = jsapi.cx();
+  JS::Rooted<JS::Value> error(cx);
+  ErrorResult result;
+  Read(global, cx, &error, result);
+  Unused << NS_WARN_IF(result.Failed());
+  mHandlerRef->ExecutionFailed(error);
+
+  return NS_OK;
+}
+
+void WorkletModuleLoader::OnModuleLoadComplete(ModuleLoadRequest* aRequest) {
+  if (!aRequest->IsTopLevel()) {
+    return;
+  }
+
+  const nsMainThreadPtrHandle<WorkletFetchHandler>& handlerRef =
+      aRequest->GetWorkletLoadContext()->GetHandlerRef();
+
+  auto addModuleFailed = MakeScopeExit([&] {
+    RefPtr<AddModuleResultRunnable> runnable =
+        new AddModuleResultRunnable(handlerRef, false);
+    NS_DispatchToMainThread(runnable.forget());
+  });
+
+  if (!aRequest->mModuleScript) {
+    return;
+  }
+
+  if (!aRequest->InstantiateModuleGraph()) {
+    return;
+  }
+
+  nsresult rv = aRequest->EvaluateModule();
+  if (NS_FAILED(rv)) {
+    return;
+  }
+
+  bool hasError = aRequest->mModuleScript->HasErrorToRethrow();
+  if (hasError) {
+    AutoJSAPI jsapi;
+    if (NS_WARN_IF(!jsapi.Init(GetGlobalObject()))) {
+      return;
+    }
+
+    JSContext* cx = jsapi.cx();
+    JS::Rooted<JS::Value> error(cx, aRequest->mModuleScript->ErrorToRethrow());
+    RefPtr<AddModuleThrowErrorRunnable> runnable =
+        new AddModuleThrowErrorRunnable(handlerRef);
+    ErrorResult result;
+    runnable->Write(cx, error, result);
+    if (NS_WARN_IF(result.Failed())) {
+      return;
+    }
+
+    addModuleFailed.release();
+    NS_DispatchToMainThread(runnable.forget());
+    return;
+  }
+
+  addModuleFailed.release();
+  RefPtr<AddModuleResultRunnable> runnable =
+      new AddModuleResultRunnable(handlerRef, true);
+  NS_DispatchToMainThread(runnable.forget());
+}
+
+// TODO: Bug 1808301: Call FormatLocalizedString from a worklet thread.
+nsresult WorkletModuleLoader::GetResolveFailureMessage(
+    ResolveError aError, const nsAString& aSpecifier, nsAString& aResult) {
+  uint8_t index = static_cast<uint8_t>(aError);
+  MOZ_ASSERT(index < static_cast<uint8_t>(ResolveError::Length));
+  MOZ_ASSERT(mLocalizedStrs);
+  MOZ_ASSERT(!mLocalizedStrs->IsEmpty());
+  if (!mLocalizedStrs || NS_WARN_IF(mLocalizedStrs->IsEmpty())) {
+    return NS_ERROR_FAILURE;
+  }
+
+  const nsString& localizedStr = mLocalizedStrs->ElementAt(index);
+
+  AutoTArray<nsString, 1> params;
+  params.AppendElement(aSpecifier);
+
+  nsStringBundleBase::FormatString(localizedStr.get(), params, aResult);
+  return NS_OK;
+}
+
+void WorkletModuleLoader::InsertRequest(nsIURI* aURI,
+                                        ModuleLoadRequest* aRequest) {
+  mFetchingRequests.InsertOrUpdate(aURI, aRequest);
+}
+
+void WorkletModuleLoader::RemoveRequest(nsIURI* aURI) {
+  MOZ_ASSERT(mFetchingRequests.Remove(aURI));
+}
+
+ModuleLoadRequest* WorkletModuleLoader::GetRequest(nsIURI* aURI) const {
+  RefPtr<ModuleLoadRequest> req;
+  MOZ_ALWAYS_TRUE(mFetchingRequests.Get(aURI, getter_AddRefs(req)));
+  return req;
+}
+
+}  // namespace mozilla::dom::loader
diff --git a/dom/worklet/loader/WorkletModuleLoader.h b/dom/worklet/loader/WorkletModuleLoader.h
new file mode 100644
index 0000000000..818720ced8
--- /dev/null
+++ b/dom/worklet/loader/WorkletModuleLoader.h
@@ -0,0 +1,119 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_dom_worklet_WorkletModuleLoader_h
+#define mozilla_dom_worklet_WorkletModuleLoader_h
+
+#include "js/loader/LoadContextBase.h"
+#include "js/loader/ModuleLoaderBase.h"
+#include "js/loader/ResolveResult.h"  // For ResolveError
+#include "mozilla/dom/WorkletFetchHandler.h"
+
+namespace mozilla::dom {
+namespace loader {
+class WorkletScriptLoader : public JS::loader::ScriptLoaderInterface {
+ public:
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_CLASS(WorkletScriptLoader)
+
+  nsIURI* GetBaseURI() const override { return nullptr; }
+
+  void ReportErrorToConsole(ScriptLoadRequest* aRequest,
+                            nsresult aResult) const override {}
+
+  void ReportWarningToConsole(
+      ScriptLoadRequest* aRequest, const char* aMessageName,
+      const nsTArray<nsString>& aParams) const override {}
+
+  nsresult FillCompileOptionsForRequest(
+      JSContext* cx, ScriptLoadRequest* aRequest, JS::CompileOptions* aOptions,
+      JS::MutableHandle<JSScript*> aIntroductionScript) override {
+    aOptions->setIntroductionType("Worklet");
+    aOptions->setFileAndLine(aRequest->mURL.get(), 1);
+    aOptions->setIsRunOnce(true);
+    aOptions->setNoScriptRval(true);
+    return NS_OK;
+  }
+
+ private:
+  ~WorkletScriptLoader() = default;
+};
+
+class WorkletModuleLoader : public JS::loader::ModuleLoaderBase {
+ public:
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(WorkletModuleLoader,
+                                           JS::loader::ModuleLoaderBase)
+
+  WorkletModuleLoader(WorkletScriptLoader* aScriptLoader,
+                      nsIGlobalObject* aGlobalObject);
+
+  void InsertRequest(nsIURI* aURI, JS::loader::ModuleLoadRequest* aRequest);
+  void RemoveRequest(nsIURI* aURI);
+  JS::loader::ModuleLoadRequest* GetRequest(nsIURI* aURI) const;
+
+  bool HasSetLocalizedStrings() const { return (bool)mLocalizedStrs; }
+  void SetLocalizedStrings(const nsTArray<nsString>* aStrings) {
+    mLocalizedStrs = aStrings;
+  }
+
+ private:
+  ~WorkletModuleLoader() = default;
+
+  already_AddRefed<JS::loader::ModuleLoadRequest> CreateStaticImport(
+      nsIURI* aURI, JS::loader::ModuleLoadRequest* aParent) override;
+
+  already_AddRefed<JS::loader::ModuleLoadRequest> CreateDynamicImport(
+      JSContext* aCx, nsIURI* aURI, LoadedScript* aMaybeActiveScript,
+      JS::Handle<JS::Value> aReferencingPrivate,
+      JS::Handle<JSString*> aSpecifier,
+      JS::Handle<JSObject*> aPromise) override;
+
+  bool CanStartLoad(JS::loader::ModuleLoadRequest* aRequest,
+                    nsresult* aRvOut) override;
+
+  nsresult StartFetch(JS::loader::ModuleLoadRequest* aRequest) override;
+
+  nsresult CompileFetchedModule(
+      JSContext* aCx, JS::Handle<JSObject*> aGlobal,
+      JS::CompileOptions& aOptions, JS::loader::ModuleLoadRequest* aRequest,
+      JS::MutableHandle<JSObject*> aModuleScript) override;
+
+  void OnModuleLoadComplete(JS::loader::ModuleLoadRequest* aRequest) override;
+
+  nsresult GetResolveFailureMessage(JS::loader::ResolveError aError,
+                                    const nsAString& aSpecifier,
+                                    nsAString& aResult) override;
+
+  // A hashtable to map a nsIURI(from main thread) to a ModuleLoadRequest(in
+  // worklet thread).
+  nsRefPtrHashtable<nsURIHashKey, JS::loader::ModuleLoadRequest>
+      mFetchingRequests;
+
+  // We get the localized strings on the main thread, and pass it to
+  // WorkletModuleLoader.
+  const nsTArray<nsString>* mLocalizedStrs = nullptr;
+};
+}  // namespace loader
+
+class WorkletLoadContext : public JS::loader::LoadContextBase {
+ public:
+  explicit WorkletLoadContext(
+      const nsMainThreadPtrHandle<WorkletFetchHandler>& aHandlerRef)
+      : JS::loader::LoadContextBase(JS::loader::ContextKind::Worklet),
+        mHandlerRef(aHandlerRef) {}
+
+  const nsMainThreadPtrHandle<WorkletFetchHandler>& GetHandlerRef() const {
+    return mHandlerRef;
+  }
+
+ private:
+  ~WorkletLoadContext() = default;
+
+  nsMainThreadPtrHandle<WorkletFetchHandler> mHandlerRef;
+};
+}  // namespace mozilla::dom
+#endif  // mozilla_dom_worklet_WorkletModuleLoader_h
diff --git a/dom/worklet/loader/moz.build b/dom/worklet/loader/moz.build
new file mode 100644
index 0000000000..38707a81cc
--- /dev/null
+++ b/dom/worklet/loader/moz.build
@@ -0,0 +1,20 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+with Files("**"):
+    BUG_COMPONENT = ("Core", "DOM: Core & HTML")
+
+EXPORTS.mozilla.dom.worklet += [
+    "WorkletModuleLoader.h",
+]
+
+UNIFIED_SOURCES += [
+    "WorkletModuleLoader.cpp",
+]
+
+include("/ipc/chromium/chromium-config.mozbuild")
+
+FINAL_LIBRARY = "xul"