RawFunction
js::CloneFunctionAtCallsite(JSContext *cx, HandleFunction fun, HandleScript script, jsbytecode *pc)
{
JS_ASSERT(cx->typeInferenceEnabled());
JS_ASSERT(fun->nonLazyScript()->shouldCloneAtCallsite);
JS_ASSERT(!fun->nonLazyScript()->enclosingStaticScope());
JS_ASSERT(types::UseNewTypeForClone(fun));
typedef CallsiteCloneKey Key;
typedef CallsiteCloneTable Table;
Table &table = cx->compartment->callsiteClones;
if (!table.initialized() && !table.init())
return NULL;
Key key;
SkipRoot skipKey(cx, &key); /* Stop the analysis complaining about unrooted key. */
key.script = script;
key.offset = pc - script->code;
key.original = fun;
Table::AddPtr p = table.lookupForAdd(key);
SkipRoot skipHash(cx, &p); /* Prevent the hash from being poisoned. */
if (p)
return p->value;
RootedObject parent(cx, fun->environment());
RootedFunction clone(cx, CloneFunctionObject(cx, fun, parent));
if (!clone)
return NULL;
/*
* Store a link back to the original for function.caller and avoid cloning
* clones.
*/
clone->nonLazyScript()->shouldCloneAtCallsite = false;
clone->nonLazyScript()->isCallsiteClone = true;
clone->nonLazyScript()->setOriginalFunctionObject(fun);
/* Recalculate the hash if script or fun have been moved. */
if (key.script != script && key.original != fun) {
key.script = script;
key.original = fun;
Table::AddPtr p = table.lookupForAdd(key);
JS_ASSERT(!p);
}
if (!table.relookupOrAdd(p, key, clone.get()))
return NULL;
return clone;
}
RawFunction
js::CloneFunctionAtCallsite(JSContext *cx, HandleFunction fun, HandleScript script, jsbytecode *pc)
{
JS_ASSERT(cx->typeInferenceEnabled());
JS_ASSERT(fun->isCloneAtCallsite());
JS_ASSERT(types::UseNewTypeForClone(fun));
JS_ASSERT(!fun->nonLazyScript()->enclosingStaticScope());
typedef CallsiteCloneKey Key;
typedef CallsiteCloneTable Table;
Table &table = cx->compartment->callsiteClones;
if (!table.initialized() && !table.init())
return NULL;
Key key;
key.script = script;
key.offset = pc - script->code;
key.original = fun;
Table::AddPtr p = table.lookupForAdd(key);
SkipRoot skipHash(cx, &p); /* Prevent the hash from being poisoned. */
if (p)
return p->value;
RootedObject parent(cx, fun->environment());
RootedFunction clone(cx, CloneFunctionObject(cx, fun, parent,
JSFunction::ExtendedFinalizeKind));
if (!clone)
return NULL;
// Store a link back to the original for function.caller.
clone->setExtendedSlot(0, ObjectValue(*fun));
// Recalculate the hash if script or fun have been moved.
if (key.script != script && key.original != fun) {
key.script = script;
key.original = fun;
Table::AddPtr p = table.lookupForAdd(key);
JS_ASSERT(!p);
}
if (!table.relookupOrAdd(p, key, clone.get()))
return NULL;
return clone;
}
