[weakrefs] Remove deprecated FinalizationGroup V8 API

Bug: v8:8179
Change-Id: I16170a197028beb35309b15613004b29a956896c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2171696
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Auto-Submit: Shu-yu Guo <syg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67492}

Author: syg

include/v8.h

@@ -5933,37 +5933,6 @@ class V8_EXPORT RegExp : public Object {
   static void CheckCast(Value* obj);
 };
 
-/**
- * An instance of the built-in FinalizationRegistry constructor.
- *
- * The C++ name is FinalizationGroup for backwards compatibility. This API is
- * experimental and deprecated.
- */
-class V8_EXPORT FinalizationGroup : public Object {
- public:
-  /**
-   * Runs the cleanup callback of the given FinalizationRegistry.
-   *
-   * V8 will inform the embedder that there are finalizer callbacks be
-   * called through HostCleanupFinalizationGroupCallback.
-   *
-   * HostCleanupFinalizationGroupCallback should schedule a task to
-   * call FinalizationGroup::Cleanup() at some point in the
-   * future. It's the embedders responsiblity to make this call at a
-   * time which does not interrupt synchronous ECMAScript code
-   * execution.
-   *
-   * If the result is Nothing<bool> then an exception has
-   * occurred. Otherwise the result is |true| if the cleanup callback
-   * was called successfully. The result is never |false|.
-   */
-  V8_DEPRECATED(
-      "FinalizationGroup cleanup is automatic if "
-      "HostCleanupFinalizationGroupCallback is not set")
-  static V8_WARN_UNUSED_RESULT Maybe<bool> Cleanup(
-      Local<FinalizationGroup> finalization_group);
-};
-
 /**
  * A JavaScript value that wraps a C++ void*. This type of value is mainly used
  * to associate C++ data structures with JavaScript objects.
@@ -7216,20 +7185,6 @@ typedef void (*AddCrashKeyCallback)(CrashKeyId id, const std::string& value);
 typedef void (*BeforeCallEnteredCallback)(Isolate*);
 typedef void (*CallCompletedCallback)(Isolate*);
 
-/**
- * HostCleanupFinalizationGroupCallback is called when we require the
- * embedder to enqueue a task that would call
- * FinalizationGroup::Cleanup().
- *
- * The FinalizationGroup is the one for which the embedder needs to
- * call FinalizationGroup::Cleanup() on.
- *
- * The context provided is the one in which the FinalizationGroup was
- * created in.
- */
-typedef void (*HostCleanupFinalizationGroupCallback)(
-    Local<Context> context, Local<FinalizationGroup> fg);
-
 /**
  * HostImportModuleDynamicallyCallback is called when we require the
  * embedder to load a module. This is used as part of the dynamic
@@ -8567,17 +8522,6 @@ class V8_EXPORT Isolate {
   void SetAbortOnUncaughtExceptionCallback(
       AbortOnUncaughtExceptionCallback callback);
 
-  /**
-   * This specifies the callback to be called when FinalizationRegistries
-   * are ready to be cleaned up and require FinalizationGroup::Cleanup()
-   * to be called in a future task.
-   */
-  V8_DEPRECATED(
-      "FinalizationRegistry cleanup is automatic if "
-      "HostCleanupFinalizationGroupCallback is not set")
-  void SetHostCleanupFinalizationGroupCallback(
-      HostCleanupFinalizationGroupCallback callback);
-
   /**
    * This specifies the callback called by the upcoming dynamic
    * import() language feature to load modules.

src/api/api-inl.h

@@ -86,7 +86,6 @@ MAKE_TO_LOCAL(ToLocal, JSArrayBufferView, ArrayBufferView)
 MAKE_TO_LOCAL(ToLocal, JSDataView, DataView)
 MAKE_TO_LOCAL(ToLocal, JSTypedArray, TypedArray)
 MAKE_TO_LOCAL(ToLocalShared, JSArrayBuffer, SharedArrayBuffer)
-MAKE_TO_LOCAL(ToLocal, JSFinalizationRegistry, FinalizationGroup)
 
 TYPED_ARRAYS(MAKE_TO_LOCAL_TYPED_ARRAY)
 

src/api/api.cc

@@ -8346,33 +8346,6 @@ void Isolate::SetAbortOnUncaughtExceptionCallback(
   isolate->SetAbortOnUncaughtExceptionCallback(callback);
 }
 
-void Isolate::SetHostCleanupFinalizationGroupCallback(
-    HostCleanupFinalizationGroupCallback callback) {
-  i::Isolate* isolate = reinterpret_cast<i::Isolate*>(this);
-  isolate->SetHostCleanupFinalizationGroupCallback(callback);
-}
-
-Maybe<bool> FinalizationGroup::Cleanup(
-    Local<FinalizationGroup> finalization_group) {
-  i::Handle<i::JSFinalizationRegistry> fr =
-      Utils::OpenHandle(*finalization_group);
-  i::Isolate* isolate = fr->native_context().GetIsolate();
-  i::Handle<i::Context> i_context(fr->native_context(), isolate);
-  Local<Context> context = Utils::ToLocal(i_context);
-  ENTER_V8(isolate, context, FinalizationGroup, Cleanup, Nothing<bool>(),
-           i::HandleScope);
-  i::Handle<i::Object> callback(fr->cleanup(), isolate);
-  i::Handle<i::Object> argv[] = {callback};
-  fr->set_scheduled_for_cleanup(false);
-  has_pending_exception =
-      i::Execution::CallBuiltin(isolate,
-                                isolate->finalization_registry_cleanup_some(),
-                                fr, arraysize(argv), argv)
-          .is_null();
-  RETURN_ON_FAILED_EXECUTION_PRIMITIVE(bool);
-  return Just(true);
-}
-
 void Isolate::SetHostImportModuleDynamicallyCallback(
     HostImportModuleDynamicallyCallback callback) {
   i::Isolate* isolate = reinterpret_cast<i::Isolate*>(this);

src/api/api.h

@@ -94,7 +94,6 @@ class RegisteredExtension {
   V(Data, Object)                              \
   V(RegExp, JSRegExp)                          \
   V(Object, JSReceiver)                        \
-  V(FinalizationGroup, JSFinalizationRegistry) \
   V(Array, JSArray)                            \
   V(Map, JSMap)                                \
   V(Set, JSSet)                                \
@@ -207,8 +206,6 @@ class Utils {
       v8::internal::Handle<v8::internal::JSTypedArray> obj);
   static inline Local<BigUint64Array> ToLocalBigUint64Array(
       v8::internal::Handle<v8::internal::JSTypedArray> obj);
-  static inline Local<FinalizationGroup> ToLocal(
-      v8::internal::Handle<v8::internal::JSFinalizationRegistry> obj);
 
   static inline Local<SharedArrayBuffer> ToLocalShared(
       v8::internal::Handle<v8::internal::JSArrayBuffer> obj);

src/execution/isolate.cc

@@ -4028,21 +4028,6 @@ MaybeHandle<JSPromise> Isolate::RunHostImportModuleDynamicallyCallback(
 
 void Isolate::ClearKeptObjects() { heap()->ClearKeptObjects(); }
 
-void Isolate::SetHostCleanupFinalizationGroupCallback(
-    HostCleanupFinalizationGroupCallback callback) {
-  host_cleanup_finalization_group_callback_ = callback;
-}
-
-void Isolate::RunHostCleanupFinalizationGroupCallback(
-    Handle<JSFinalizationRegistry> fr) {
-  if (host_cleanup_finalization_group_callback_ != nullptr) {
-    v8::Local<v8::Context> api_context =
-        v8::Utils::ToLocal(handle(Context::cast(fr->native_context()), this));
-    host_cleanup_finalization_group_callback_(api_context,
-                                              v8::Utils::ToLocal(fr));
-  }
-}
-
 void Isolate::SetHostImportModuleDynamicallyCallback(
     HostImportModuleDynamicallyCallback callback) {
   host_import_module_dynamically_callback_ = callback;

src/execution/isolate.h

@@ -1416,14 +1416,6 @@ class V8_EXPORT_PRIVATE Isolate final : private HiddenFactory {
   bool IsInAnyContext(Object object, uint32_t index);
 
   void ClearKeptObjects();
-  void SetHostCleanupFinalizationGroupCallback(
-      HostCleanupFinalizationGroupCallback callback);
-  HostCleanupFinalizationGroupCallback
-  host_cleanup_finalization_group_callback() const {
-    return host_cleanup_finalization_group_callback_;
-  }
-  void RunHostCleanupFinalizationGroupCallback(
-      Handle<JSFinalizationRegistry> fr);
 
   void SetHostImportModuleDynamicallyCallback(
       HostImportModuleDynamicallyCallback callback);
@@ -1680,8 +1672,6 @@ class V8_EXPORT_PRIVATE Isolate final : private HiddenFactory {
   v8::Isolate::AtomicsWaitCallback atomics_wait_callback_ = nullptr;
   void* atomics_wait_callback_data_ = nullptr;
   PromiseHook promise_hook_ = nullptr;
-  HostCleanupFinalizationGroupCallback
-      host_cleanup_finalization_group_callback_ = nullptr;
   HostImportModuleDynamicallyCallback host_import_module_dynamically_callback_ =
       nullptr;
   HostInitializeImportMetaObjectCallback

src/heap/finalization-registry-cleanup-task.cc

@@ -37,7 +37,6 @@ void FinalizationRegistryCleanupTask::SlowAssertNoActiveJavaScript() {
 
 void FinalizationRegistryCleanupTask::RunInternal() {
   Isolate* isolate = heap_->isolate();
-  DCHECK(!isolate->host_cleanup_finalization_group_callback());
   SlowAssertNoActiveJavaScript();
 
   TRACE_EVENT_CALL_STATS_SCOPED(isolate, "v8",

src/heap/heap.cc

@@ -1198,16 +1198,6 @@ void Heap::GarbageCollectionEpilogue() {
     TRACE_GC(tracer(), GCTracer::Scope::HEAP_EPILOGUE_REDUCE_NEW_SPACE);
     ReduceNewSpaceSize();
   }
-
-  if (FLAG_harmony_weak_refs &&
-      isolate()->host_cleanup_finalization_group_callback()) {
-    HandleScope handle_scope(isolate());
-    Handle<JSFinalizationRegistry> finalization_registry;
-    while (
-        DequeueDirtyJSFinalizationRegistry().ToHandle(&finalization_registry)) {
-      isolate()->RunHostCleanupFinalizationGroupCallback(finalization_registry);
-    }
-  }
 }
 
 class GCCallbacksScope {
@@ -6141,7 +6131,6 @@ void Heap::SetInterpreterEntryTrampolineForProfiling(Code code) {
 }
 
 void Heap::PostFinalizationRegistryCleanupTaskIfNeeded() {
-  DCHECK(!isolate()->host_cleanup_finalization_group_callback());
   // Only one cleanup task is posted at a time.
   if (!HasDirtyJSFinalizationRegistries() ||
       is_finalization_registry_cleanup_task_posted_) {
@@ -6201,7 +6190,6 @@ MaybeHandle<JSFinalizationRegistry> Heap::DequeueDirtyJSFinalizationRegistry() {
 
 void Heap::RemoveDirtyFinalizationRegistriesOnContext(NativeContext context) {
   if (!FLAG_harmony_weak_refs) return;
-  if (isolate()->host_cleanup_finalization_group_callback()) return;
 
   DisallowHeapAllocation no_gc;
 

src/heap/mark-compact.cc

@@ -2536,9 +2536,7 @@ void MarkCompactCollector::ClearJSWeakRefs() {
       RecordSlot(weak_cell, slot, HeapObject::cast(*slot));
     }
   }
-  if (!isolate()->host_cleanup_finalization_group_callback()) {
-    heap()->PostFinalizationRegistryCleanupTaskIfNeeded();
-  }
+  heap()->PostFinalizationRegistryCleanupTaskIfNeeded();
 }
 
 void MarkCompactCollector::AbortWeakObjects() {

src/logging/counters.h

@@ -772,7 +772,6 @@ class RuntimeCallTimer final {
   V(Int8Array_New)                                         \
   V(Isolate_DateTimeConfigurationChangeNotification)       \
   V(Isolate_LocaleConfigurationChangeNotification)         \
-  V(FinalizationGroup_Cleanup)                             \
   V(JSON_Parse)                                            \
   V(JSON_Stringify)                                        \
   V(Map_AsArray)                                           \