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Bug 834732 - Assert proper cx stack handling in WrapperFactory::Rewrap. r=mrbkap

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This commit is contained in:
Bobby Holley 2013-02-26 11:04:13 -08:00
parent d1a3436036
commit 2473e41a58
2 changed files with 5 additions and 2 deletions
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1
js/xpconnect/src/XPCWrappedJSClass.cpp
View File

@ -492,6 +492,7 @@ nsXPCWrappedJSClass::IsWrappedJS(nsISupports* aPtr)
result == WrappedJSIdentity::GetSingleton();
}
// NB: This returns null unless there's nothing on the JSContext stack.
static JSContext *
GetContextFromObject(JSObject *obj)
{

6
js/xpconnect/wrappers/WrapperFactory.cpp
View File

@ -285,8 +285,7 @@ DEBUG_CheckUnwrapSafety(JSObject *obj, js::Wrapper *handler,
MOZ_ASSERT(!handler->isSafeToUnwrap());
} else if (AccessCheck::needsSystemOnlyWrapper(obj)) {
// SOWs are opaque to everyone but Chrome and XBL scopes.
// FIXME: Re-enable in bug 834732.
// MOZ_ASSERT(handler->isSafeToUnwrap() == nsContentUtils::CanAccessNativeAnon());
MOZ_ASSERT(handler->isSafeToUnwrap() == nsContentUtils::CanAccessNativeAnon());
} else {
// Otherwise, it should depend on whether the target subsumes the origin.
MOZ_ASSERT(handler->isSafeToUnwrap() == AccessCheck::subsumes(target, origin));
@ -342,6 +341,9 @@ WrapperFactory::Rewrap(JSContext *cx, JSObject *existing, JSObject *obj,
"wrapped object passed to rewrap");
MOZ_ASSERT(JS_GetClass(obj) != &XrayUtils::HolderClass, "trying to wrap a holder");
MOZ_ASSERT(!js::IsInnerObject(obj));
// We sometimes end up here after nsContentUtils has been shut down but before
// XPConnect has been shut down, so check the context stack the roundabout way.
MOZ_ASSERT(XPCJSRuntime::Get()->GetJSContextStack()->Peek() == cx);
// Compute the information we need to select the right wrapper.
JSCompartment *origin = js::GetObjectCompartment(obj);