[api] Expose ES6 7.3.14 SetIntegrityLevel on v8::Object

jeisinger · Commit bot · commit 93c60dca132a · 2016-04-15T12:19:28.000Z
BUG=v8:4846 R=verwaest@chromium.org LOG=y Review URL: https://codereview.chromium.org/1889903003 Cr-Commit-Position: refs/heads/master@{#35520}
diff --git a/include/v8.h b/include/v8.h
@@ -2639,6 +2639,10 @@ enum AccessControl {
   PROHIBITS_OVERWRITING = 1 << 2
 };
 
+/**
+ * Integrity level for objects.
+ */
+enum class IntegrityLevel { kFrozen, kSealed };
 
 /**
  * A JavaScript object (ECMA-262, 4.3.3)
@@ -2830,6 +2834,11 @@ class V8_EXPORT Object : public Value {
    */
   Local<String> GetConstructorName();
 
+  /**
+   * Sets the integrity level of the object.
+   */
+  Maybe<bool> SetIntegrityLevel(Local<Context> context, IntegrityLevel level);
+
   /** Gets the number of internal fields for this Object. */
   int InternalFieldCount();
 
diff --git a/src/api.cc b/src/api.cc
@@ -3912,6 +3912,19 @@ Local<String> v8::Object::GetConstructorName() {
   return Utils::ToLocal(name);
 }
 
+Maybe<bool> v8::Object::SetIntegrityLevel(Local<Context> context,
+                                          IntegrityLevel level) {
+  PREPARE_FOR_EXECUTION_PRIMITIVE(context, "v8::Object::SetIntegrityLevel()",
+                                  bool);
+  auto self = Utils::OpenHandle(this);
+  i::JSReceiver::IntegrityLevel i_level =
+      level == IntegrityLevel::kFrozen ? i::FROZEN : i::SEALED;
+  Maybe<bool> result =
+      i::JSReceiver::SetIntegrityLevel(self, i_level, i::Object::DONT_THROW);
+  has_pending_exception = result.IsNothing();
+  RETURN_ON_FAILED_EXECUTION_PRIMITIVE(bool);
+  return result;
+}
 
 Maybe<bool> v8::Object::Delete(Local<Context> context, Local<Value> key) {
   PREPARE_FOR_EXECUTION_PRIMITIVE(context, "v8::Object::Delete()", bool);
diff --git a/test/cctest/test-api.cc b/test/cctest/test-api.cc
@@ -24985,3 +24985,21 @@ TEST(MemoryPressure) {
   isolate->MemoryPressureNotification(v8::MemoryPressureLevel::kNone);
   CHECK(!CcTest::i_isolate()->heap()->ShouldOptimizeForMemoryUsage());
 }
+
+TEST(SetIntegrityLevel) {
+  LocalContext context;
+  v8::Isolate* isolate = CcTest::isolate();
+  v8::HandleScope scope(isolate);
+
+  v8::Local<v8::Object> obj = v8::Object::New(isolate);
+  CHECK(context->Global()->Set(context.local(), v8_str("o"), obj).FromJust());
+
+  v8::Local<v8::Value> is_frozen = CompileRun("Object.isFrozen(o)");
+  CHECK(!is_frozen->BooleanValue(context.local()).FromJust());
+
+  CHECK(obj->SetIntegrityLevel(context.local(), v8::IntegrityLevel::kFrozen)
+            .FromJust());
+
+  is_frozen = CompileRun("Object.isFrozen(o)");
+  CHECK(is_frozen->BooleanValue(context.local()).FromJust());
+}
