1 files changed, 39 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/runtime/JSDestructibleObject.h b/Source/JavaScriptCore/runtime/JSDestructibleObject.h
index efbe2b4f6..27dc06da5 100644
--- a/Source/JavaScriptCore/runtime/JSDestructibleObject.h
+++ b/Source/JavaScriptCore/runtime/JSDestructibleObject.h
@@ -3,4 +3,43 @@
 
 #include "JSObject.h"
 
+namespace JSC {
+
+struct ClassInfo;
+
+class JSDestructibleObject : public JSNonFinalObject {
+public:
+    typedef JSNonFinalObject Base;
+
+    static const bool needsDestruction = true;
+
+    const ClassInfo* classInfo() const { return m_classInfo; }
+    
+    static ptrdiff_t classInfoOffset() { return OBJECT_OFFSETOF(JSDestructibleObject, m_classInfo); }
+
+protected:
+    JSDestructibleObject(VM& vm, Structure* structure, Butterfly* butterfly = 0)
+        : JSNonFinalObject(vm, structure, butterfly)
+        , m_classInfo(structure->classInfo())
+    {
+        ASSERT(m_classInfo);
+    }
+
+private:
+    const ClassInfo* m_classInfo;
+};
+
+inline const ClassInfo* JSCell::classInfo() const
+{
+    if (MarkedBlock::blockFor(this)->destructorType() == MarkedBlock::Normal)
+        return static_cast<const JSDestructibleObject*>(this)->classInfo();
+#if ENABLE(GC_VALIDATION)
+    return m_structure.unvalidatedGet()->classInfo();
+#else
+    return m_structure->classInfo();
+#endif
+}
+
+} // namespace JSC
+
 #endif