[promisehook] Implement PromiseHook

src/runtime/runtime-promise.cc

 // 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/runtime/runtime-utils.h"
 
 #include "src/debug/debug.h"
 #include "src/elements.h"
 #include "src/promise-utils.h"
 
 namespace v8 {
@@ skipping 266 matching lines @@
 
 RUNTIME_FUNCTION(Runtime_PromiseMarkAsHandled) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 1);
   CONVERT_ARG_HANDLE_CHECKED(JSPromise, promise, 0);
 
   promise->set_has_handler(true);
   return isolate->heap()->undefined_value();
 }
 
+RUNTIME_FUNCTION(Runtime_PromiseHookInit) {
+  DCHECK_EQ(2, args.length());
+  CONVERT_ARG_HANDLE_CHECKED(JSPromise, promise, 0);

[adamk, 2016/12/15 15:43:58]

You should have handle scopes here, since you're creating handles. Same goes for
all the places below.

[gsathya, 2016/12/15 16:32:06]

Done.

+  CONVERT_ARG_HANDLE_CHECKED(Object, parent, 1);
+  isolate->RunPromiseHook(PromiseHookType::kInit, promise, parent);
+  return isolate->heap()->undefined_value();
+}
+
+RUNTIME_FUNCTION(Runtime_PromiseHookResolve) {
+  DCHECK_EQ(1, args.length());
+  CONVERT_ARG_HANDLE_CHECKED(JSPromise, promise, 0);
+  isolate->RunPromiseHook(PromiseHookType::kResolve, promise,
+                          isolate->factory()->undefined_value());
+  return isolate->heap()->undefined_value();
+}
+
+RUNTIME_FUNCTION(Runtime_PromiseHookBefore) {
+  DCHECK_EQ(1, args.length());
+  CONVERT_ARG_HANDLE_CHECKED(JSPromise, promise, 0);
+  isolate->RunPromiseHook(PromiseHookType::kBefore, promise,
+                          isolate->factory()->undefined_value());
+  return isolate->heap()->undefined_value();
+}
+
+RUNTIME_FUNCTION(Runtime_PromiseHookAfter) {
+  DCHECK_EQ(1, args.length());
+  CONVERT_ARG_HANDLE_CHECKED(JSPromise, promise, 0);
+  isolate->RunPromiseHook(PromiseHookType::kAfter, promise,
+                          isolate->factory()->undefined_value());
+  return isolate->heap()->undefined_value();
+}
+
 }  // namespace internal
 }  // namespace v8