// Copyright 2016 the V8 project authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #include "src/api-inl.h" #include "src/arguments-inl.h" #include "src/counters.h" #include "src/debug/debug.h" #include "src/elements.h" #include "src/microtask-queue.h" #include "src/objects-inl.h" #include "src/objects/heap-object-inl.h" #include "src/objects/js-promise-inl.h" #include "src/objects/oddball-inl.h" #include "src/runtime/runtime-utils.h" namespace v8 { namespace internal { RUNTIME_FUNCTION(Runtime_PromiseRejectEventFromStack) { DCHECK_EQ(2, args.length()); HandleScope scope(isolate); CONVERT_ARG_HANDLE_CHECKED(JSPromise, promise, 0); CONVERT_ARG_HANDLE_CHECKED(Object, value, 1); Handle<Object> rejected_promise = promise; if (isolate->debug()->is_active()) { // If the Promise.reject() call is caught, then this will return // undefined, which we interpret as being a caught exception event. rejected_promise = isolate->GetPromiseOnStackOnThrow(); } isolate->RunPromiseHook(PromiseHookType::kResolve, promise, isolate->factory()->undefined_value()); isolate->debug()->OnPromiseReject(rejected_promise, value); // Report only if we don't actually have a handler. if (!promise->has_handler()) { isolate->ReportPromiseReject(promise, value, v8::kPromiseRejectWithNoHandler); } return ReadOnlyRoots(isolate).undefined_value(); } RUNTIME_FUNCTION(Runtime_PromiseRejectAfterResolved) { DCHECK_EQ(2, args.length()); HandleScope scope(isolate); CONVERT_ARG_HANDLE_CHECKED(JSPromise, promise, 0); CONVERT_ARG_HANDLE_CHECKED(Object, reason, 1); isolate->ReportPromiseReject(promise, reason, v8::kPromiseRejectAfterResolved); return ReadOnlyRoots(isolate).undefined_value(); } RUNTIME_FUNCTION(Runtime_PromiseResolveAfterResolved) { DCHECK_EQ(2, args.length()); HandleScope scope(isolate); CONVERT_ARG_HANDLE_CHECKED(JSPromise, promise, 0); CONVERT_ARG_HANDLE_CHECKED(Object, resolution, 1); isolate->ReportPromiseReject(promise, resolution, v8::kPromiseResolveAfterResolved); return ReadOnlyRoots(isolate).undefined_value(); } RUNTIME_FUNCTION(Runtime_PromiseRevokeReject) { DCHECK_EQ(1, args.length()); HandleScope scope(isolate); CONVERT_ARG_HANDLE_CHECKED(JSPromise, promise, 0); // At this point, no revocation has been issued before CHECK(!promise->has_handler()); isolate->ReportPromiseReject(promise, Handle<Object>(), v8::kPromiseHandlerAddedAfterReject); return ReadOnlyRoots(isolate).undefined_value(); } RUNTIME_FUNCTION(Runtime_EnqueueMicrotask) { HandleScope scope(isolate); DCHECK_EQ(1, args.length()); CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0); Handle<CallableTask> microtask = isolate->factory()->NewCallableTask(function, isolate->native_context()); isolate->native_context()->microtask_queue()->EnqueueMicrotask(*microtask); return ReadOnlyRoots(isolate).undefined_value(); } RUNTIME_FUNCTION(Runtime_PerformMicrotaskCheckpoint) { HandleScope scope(isolate); DCHECK_EQ(0, args.length()); MicrotasksScope::PerformCheckpoint(reinterpret_cast<v8::Isolate*>(isolate)); return ReadOnlyRoots(isolate).undefined_value(); } RUNTIME_FUNCTION(Runtime_RunMicrotaskCallback) { HandleScope scope(isolate); DCHECK_EQ(2, args.length()); CONVERT_ARG_CHECKED(Object, microtask_callback, 0); CONVERT_ARG_CHECKED(Object, microtask_data, 1); MicrotaskCallback callback = ToCData<MicrotaskCallback>(microtask_callback); void* data = ToCData<void*>(microtask_data); callback(data); RETURN_FAILURE_IF_SCHEDULED_EXCEPTION(isolate); return ReadOnlyRoots(isolate).undefined_value(); } RUNTIME_FUNCTION(Runtime_PromiseStatus) { HandleScope scope(isolate); DCHECK_EQ(1, args.length()); CONVERT_ARG_HANDLE_CHECKED(JSPromise, promise, 0); return Smi::FromInt(promise->status()); } RUNTIME_FUNCTION(Runtime_PromiseMarkAsHandled) { SealHandleScope shs(isolate); DCHECK_EQ(1, args.length()); CONVERT_ARG_CHECKED(JSPromise, promise, 0); promise->set_has_handler(true); return ReadOnlyRoots(isolate).undefined_value(); } RUNTIME_FUNCTION(Runtime_PromiseHookInit) { HandleScope scope(isolate); DCHECK_EQ(2, args.length()); CONVERT_ARG_HANDLE_CHECKED(JSPromise, promise, 0); CONVERT_ARG_HANDLE_CHECKED(Object, parent, 1); isolate->RunPromiseHook(PromiseHookType::kInit, promise, parent); return ReadOnlyRoots(isolate).undefined_value(); } namespace { Handle<JSPromise> AwaitPromisesInitCommon(Isolate* isolate, Handle<Object> value, Handle<JSPromise> promise, Handle<JSPromise> outer_promise, Handle<JSFunction> reject_handler, bool is_predicted_as_caught) { // Allocate the throwaway promise and fire the appropriate init // hook for the throwaway promise (passing the {promise} as its // parent). Handle<JSPromise> throwaway = isolate->factory()->NewJSPromiseWithoutHook(); isolate->RunPromiseHook(PromiseHookType::kInit, throwaway, promise); // On inspector side we capture async stack trace and store it by // outer_promise->async_task_id when async function is suspended first time. // To use captured stack trace later throwaway promise should have the same // async_task_id as outer_promise since we generate WillHandle and DidHandle // events using throwaway promise. throwaway->set_async_task_id(outer_promise->async_task_id()); // The Promise will be thrown away and not handled, but it // shouldn't trigger unhandled reject events as its work is done throwaway->set_has_handler(true); // Enable proper debug support for promises. if (isolate->debug()->is_active()) { if (value->IsJSPromise()) { Object::SetProperty( isolate, reject_handler, isolate->factory()->promise_forwarding_handler_symbol(), isolate->factory()->true_value(), StoreOrigin::kMaybeKeyed, Just(ShouldThrow::kThrowOnError)) .Check(); Handle<JSPromise>::cast(value)->set_handled_hint(is_predicted_as_caught); } // Mark the dependency to {outer_promise} in case the {throwaway} // Promise is found on the Promise stack Object::SetProperty(isolate, throwaway, isolate->factory()->promise_handled_by_symbol(), outer_promise, StoreOrigin::kMaybeKeyed, Just(ShouldThrow::kThrowOnError)) .Check(); } return throwaway; } } // namespace RUNTIME_FUNCTION(Runtime_AwaitPromisesInit) { DCHECK_EQ(5, args.length()); HandleScope scope(isolate); CONVERT_ARG_HANDLE_CHECKED(Object, value, 0); CONVERT_ARG_HANDLE_CHECKED(JSPromise, promise, 1); CONVERT_ARG_HANDLE_CHECKED(JSPromise, outer_promise, 2); CONVERT_ARG_HANDLE_CHECKED(JSFunction, reject_handler, 3); CONVERT_BOOLEAN_ARG_CHECKED(is_predicted_as_caught, 4); return *AwaitPromisesInitCommon(isolate, value, promise, outer_promise, reject_handler, is_predicted_as_caught); } RUNTIME_FUNCTION(Runtime_AwaitPromisesInitOld) { DCHECK_EQ(5, args.length()); HandleScope scope(isolate); CONVERT_ARG_HANDLE_CHECKED(Object, value, 0); CONVERT_ARG_HANDLE_CHECKED(JSPromise, promise, 1); CONVERT_ARG_HANDLE_CHECKED(JSPromise, outer_promise, 2); CONVERT_ARG_HANDLE_CHECKED(JSFunction, reject_handler, 3); CONVERT_BOOLEAN_ARG_CHECKED(is_predicted_as_caught, 4); // Fire the init hook for the wrapper promise (that we created for the // {value} previously). isolate->RunPromiseHook(PromiseHookType::kInit, promise, outer_promise); return *AwaitPromisesInitCommon(isolate, value, promise, outer_promise, reject_handler, is_predicted_as_caught); } RUNTIME_FUNCTION(Runtime_PromiseHookBefore) { HandleScope scope(isolate); DCHECK_EQ(1, args.length()); CONVERT_ARG_HANDLE_CHECKED(JSReceiver, maybe_promise, 0); if (!maybe_promise->IsJSPromise()) return ReadOnlyRoots(isolate).undefined_value(); Handle<JSPromise> promise = Handle<JSPromise>::cast(maybe_promise); if (isolate->debug()->is_active()) isolate->PushPromise(promise); if (promise->IsJSPromise()) { isolate->RunPromiseHook(PromiseHookType::kBefore, promise, isolate->factory()->undefined_value()); } return ReadOnlyRoots(isolate).undefined_value(); } RUNTIME_FUNCTION(Runtime_PromiseHookAfter) { HandleScope scope(isolate); DCHECK_EQ(1, args.length()); CONVERT_ARG_HANDLE_CHECKED(JSReceiver, maybe_promise, 0); if (!maybe_promise->IsJSPromise()) return ReadOnlyRoots(isolate).undefined_value(); Handle<JSPromise> promise = Handle<JSPromise>::cast(maybe_promise); if (isolate->debug()->is_active()) isolate->PopPromise(); if (promise->IsJSPromise()) { isolate->RunPromiseHook(PromiseHookType::kAfter, promise, isolate->factory()->undefined_value()); } return ReadOnlyRoots(isolate).undefined_value(); } RUNTIME_FUNCTION(Runtime_RejectPromise) { HandleScope scope(isolate); DCHECK_EQ(3, args.length()); CONVERT_ARG_HANDLE_CHECKED(JSPromise, promise, 0); CONVERT_ARG_HANDLE_CHECKED(Object, reason, 1); CONVERT_ARG_HANDLE_CHECKED(Oddball, debug_event, 2); return *JSPromise::Reject(promise, reason, debug_event->BooleanValue(isolate)); } RUNTIME_FUNCTION(Runtime_ResolvePromise) { HandleScope scope(isolate); DCHECK_EQ(2, args.length()); CONVERT_ARG_HANDLE_CHECKED(JSPromise, promise, 0); CONVERT_ARG_HANDLE_CHECKED(Object, resolution, 1); Handle<Object> result; ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, JSPromise::Resolve(promise, resolution)); return *result; } } // namespace internal } // namespace v8