Changeset 197418 in webkit for trunk/Source/JavaScriptCore/runtime/ProxyObject.h

Timestamp:

Mar 1, 2016, 3:42:33 PM (9 years ago)

Author:

[email protected]

Message:

[ES6] Implement Proxy.PreventExtensions
​https://bugs.webkit.org/show_bug.cgi?id=154873

Reviewed by Oliver Hunt.

This patch is a direct implementation of Proxy.PreventExtensions with respect to section 9.5.4
of the ECMAScript 6 spec.
​https://tc39.github.io/ecma262/#sec-proxy-object-internal-methods-and-internal-slots-preventextensions

• runtime/ProxyObject.cpp:

(JSC::ProxyObject::deletePropertyByIndex):
(JSC::ProxyObject::performPreventExtensions):
(JSC::ProxyObject::preventExtensions):
(JSC::ProxyObject::visitChildren):

• runtime/ProxyObject.h:
• tests/es6.yaml:
• tests/stress/proxy-prevent-extensions.js: Added.

(assert):
(throw.new.Error.let.handler.get preventExtensions):
(throw.new.Error):
(assert.let.handler.preventExtensions):
(assert.):
(let.handler.preventExtensions):
(assert.Object.isSealed.let.handler.preventExtensions):
(assert.Object.isSealed):

File:

• trunk/Source/JavaScriptCore/runtime/ProxyObject.h (modified) (2 diffs)

trunk/Source/JavaScriptCore/runtime/ProxyObject.h

@@ -70 +70 @@
     static bool deleteProperty(JSCell*, ExecState*, PropertyName);
     static bool deletePropertyByIndex(JSCell*, ExecState*, unsigned propertyName);
+    static bool preventExtensions(JSObject*, ExecState*);
     static void visitChildren(JSCell*, SlotVisitor&);
 
@@ -79 +80 @@
     template <typename PerformDefaultPutFunction>
     void performPut(ExecState*, JSValue putValue, JSValue thisValue, PropertyName, PerformDefaultPutFunction);
+    bool performPreventExtensions(ExecState*);
 
     WriteBarrier<JSObject> m_target;