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// 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/api-inl.h"
#include "src/debug/debug.h"
#include "src/execution/arguments-inl.h"
#include "src/execution/microtask-queue.h"
#include "src/logging/counters.h"
#include "src/objects/elements.h"
#include "src/objects/heap-object-inl.h"
#include "src/objects/js-promise-inl.h"
#include "src/objects/objects-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, handle(function->native_context(), isolate));
MicrotaskQueue* microtask_queue =
function->native_context().microtask_queue();
if (microtask_queue) 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
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