Hello,
now I've commited a version with the failure I described bevore.
I implement it in the following way:
jswrapper.cpp:
bool
CrossCompartmentWrapper::isTransparent(JSContext *cx, HandleObject
wrapper, bool *bp)
{
return Wrapper::isTransparent(cx, wrapper, bp);
}
I use the following function GetDirectProxyHandlerObject to get the
Handler Object like in the ScriptedProxyHandler, but in this case I get
an assertion in the function "toObjectOrNull()":
Assertion failure: isObjectOrNull(), at ../dist/include/js/Value.h:1157
jsproxy.cpp:
static JSObject *
GetDirectProxyHandlerObject(JSObject *proxy)
{
return proxy->as<ProxyObject>().extra(0).toObjectOrNull();
}
bool
DirectProxyHandler::isTransparent(JSContext *cx, HandleObject proxy,
bool *bp)
{
// step 1
RootedObject handler(cx, GetDirectProxyHandlerObject(proxy));
// step 2
JSString* propStr = JS_InternString(cx, "isTransparent");
JSAtom& atom = propStr->asAtom();
RootedValue trap(cx);
if (!JSObject::getProperty(cx, handler, handler,
atom.asPropertyName(), &trap))
return false;
// step 3
if (trap.isUndefined())
{
*bp = false;
return true;
}
// step 4
Value argv[] = {
// ObjectOrNullValue(target),
// value
};
RootedValue trapResult(cx);
if (!Invoke(cx, ObjectValue(*handler), trap, 0, argv, &trapResult))
return false;
// step 5
bool success = ToBoolean(trapResult);
// step 6
*bp = success;
return true;
}
Why can I use this code in the trap of ScriptedDirectProxyHandler but
not in the DirectProxyHandler?
How can I retrieve the correct Object for Step 1 in the
isTransparent()-trap?
Can someone explain me the proxy slots?
PROXY_PRIVATE_SLOT: ;
PROXY_HANDLER_SLOT;
PROXY_EXTRA_SLOT;
Private slot contains the target? Handler slot the handler? But which
values contain the extra slots?
For the ScriptedDirectProxyHandler the first extra slot contains the
DirectProxyHandler if I'm right:
static JSObject *
GetDirectProxyHandlerObject(JSObject *proxy)
{
return proxy->as<ProxyObject>().extra(0).toObjectOrNull();
}
But for DirectProxyHandler, where can I get the same Object to call the
trap and test the data?
If I use "proxy->as<ProxyObject>().target()" the trap is undefined.
Thanks
Andreas
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