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Bug 765034 - Fix unusual DOM proto array case (r=bz)

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This commit is contained in:
Bill McCloskey 2012-06-18 17:04:38 -07:00
parent f768abe84d
commit fbd438fda7
2 changed files with 10 additions and 0 deletions
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2
dom/bindings/BindingUtils.h
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@ -211,6 +211,8 @@ TraceProtoOrIfaceCache(JSTracer* trc, JSObject* obj)
{
MOZ_ASSERT(js::GetObjectClass(obj)->flags & JSCLASS_DOM_GLOBAL);
if (!HasProtoOrIfaceArray(obj))
return;
JSObject** protoOrIfaceArray = GetProtoOrIfaceArray(obj);
for (size_t i = 0; i < kProtoOrIfaceCacheCount; ++i) {
JSObject* proto = protoOrIfaceArray[i];

8
dom/bindings/DOMJSClass.h
View File

@ -85,6 +85,14 @@ struct DOMJSClass
JSClass* ToJSClass() { return &mBase; }
};
inline bool
HasProtoOrIfaceArray(JSObject* global)
{
MOZ_ASSERT(js::GetObjectClass(global)->flags & JSCLASS_DOM_GLOBAL);
// This can be undefined if we GC while creating the global
return !js::GetReservedSlot(global, DOM_PROTOTYPE_SLOT).isUndefined();
}
inline JSObject**
GetProtoOrIfaceArray(JSObject* global)
{