Bug 1278562 - Implement a C++ interface for DebuggerObject.promiseValue. r=jimb

js/src/vm/Debugger.cpp

@@ -8633,19 +8633,17 @@ DebuggerObject::promiseStateGetter(JSContext* cx, unsigned argc, Value* vp)
 /* static */ bool
 DebuggerObject::promiseValueGetter(JSContext* cx, unsigned argc, Value* vp)
 {
-    THIS_DEBUGOBJECT_OWNER_PROMISE(cx, argc, vp, "get promiseValue", args, dbg, refobj);
+    THIS_DEBUGOBJECT(cx, argc, vp, "get promiseValue", args, object);
 
-    if (promise->state() != JS::PromiseState::Fulfilled) {
+    if (!DebuggerObject::requirePromise(cx, object))
+        return false;
+
+    if (object->promiseState() != JS::PromiseState::Fulfilled) {
         args.rval().setUndefined();
         return true;
     }
 
-    RootedValue result(cx, promise->value());
-    if (!dbg->wrapDebuggeeValue(cx, &result))
-        return false;
-
-    args.rval().set(result);
-    return true;
+    return DebuggerObject::getPromiseValue(cx, object, args.rval());;
 }
 
 /* static */ bool
@@ -9530,6 +9528,18 @@ DebuggerObject::getErrorMessageName(JSContext* cx, HandleDebuggerObject object,
     return true;
 }
 
+#ifdef SPIDERMONKEY_PROMISE
+/* static */ bool
+DebuggerObject::getPromiseValue(JSContext* cx, HandleDebuggerObject object,
+                                MutableHandleValue result)
+{
+    MOZ_ASSERT(object->promiseState() == JS::PromiseState::Fulfilled);
+
+    result.set(object->promise()->value());
+    return object->owner()->wrapDebuggeeValue(cx, result);
+}
+#endif // SPIDERMONKEY_PROMISE
+
 /* static */ bool
 DebuggerObject::isExtensible(JSContext* cx, HandleDebuggerObject object, bool& result)
 {

js/src/vm/Debugger.h

@@ -1257,6 +1257,11 @@ class DebuggerObject : public NativeObject
                                                     MutableHandleDebuggerObject result);
     static MOZ_MUST_USE bool getScriptedProxyHandler(JSContext* cx, HandleDebuggerObject object,
                                                      MutableHandleDebuggerObject result);
+#ifdef SPIDERMONKEY_PROMISE
+    static MOZ_MUST_USE bool getPromiseValue(JSContext* cx, HandleDebuggerObject object,
+                                             MutableHandleValue result);
+#endif // SPIDERMONKEY_PROMISE
+
     // Methods
     static MOZ_MUST_USE bool isExtensible(JSContext* cx, HandleDebuggerObject object,
                                           bool& result);