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Bug 911216 - Part 4: Add self-hosting intrinsic for creating arrays in other compartments. r=efaust

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This commit is contained in:
Till Schneidereit 2016-02-10 23:09:13 +01:00
parent 51e16e717a
commit 4ecef93ff0
1 changed files with 29 additions and 0 deletions
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29
js/src/vm/SelfHosting.cpp
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@ -614,6 +614,34 @@ intrinsic_UnsafeGetBooleanFromReservedSlot(JSContext* cx, unsigned argc, Value*
return true;
}
/**
* Intrinsic for creating an empty array in the compartment of the object
* passed as the first argument.
*
* Returns the array, wrapped in the default wrapper to use between the two
* compartments.
*/
static bool
intrinsic_NewArrayInCompartment(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 1);
RootedObject wrapped(cx, &args[0].toObject());
MOZ_ASSERT(IsWrapper(wrapped));
RootedObject obj(cx, UncheckedUnwrap(wrapped));
RootedArrayObject arr(cx);
{
AutoCompartment ac(cx, obj);
arr = NewDenseEmptyArray(cx);
if (!arr)
return false;
}
args.rval().setObject(*arr);
return wrapped->compartment()->wrap(cx, args.rval());
}
static bool
intrinsic_IsPackedArray(JSContext* cx, unsigned argc, Value* vp)
{
@ -1897,6 +1925,7 @@ static const JSFunctionSpec intrinsic_functions[] = {
IntrinsicUnsafeGetBooleanFromReservedSlot),
JS_FN("UnsafeCallWrappedFunction", intrinsic_UnsafeCallWrappedFunction,2,0),
JS_FN("NewArrayInCompartment", intrinsic_NewArrayInCompartment, 1,0),
JS_FN("IsPackedArray", intrinsic_IsPackedArray, 1,0),