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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "xpcprivate.h"
#include "XPCWrapper.h"
#include "WrapperFactory.h"
#include "AccessCheck.h"
using namespace xpc;
using namespace mozilla;
using namespace JS;
namespace XPCNativeWrapper {
static inline
bool
ThrowException(nsresult ex, JSContext* cx)
{
XPCThrower::Throw(ex, cx);
return false;
}
static bool
UnwrapNW(JSContext* cx, unsigned argc, Value* vp)
{
JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
if (args.length() != 1) {
return ThrowException(NS_ERROR_XPC_NOT_ENOUGH_ARGS, cx);
}
JS::RootedValue v(cx, args[0]);
if (!v.isObject() || !js::IsCrossCompartmentWrapper(&v.toObject()) ||
!WrapperFactory::AllowWaiver(&v.toObject())) {
args.rval().set(v);
return true;
}
bool ok = xpc::WrapperFactory::WaiveXrayAndWrap(cx, &v);
NS_ENSURE_TRUE(ok, false);
args.rval().set(v);
return true;
}
static bool
XrayWrapperConstructor(JSContext* cx, unsigned argc, Value* vp)
{
JS::CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() == 0) {
return ThrowException(NS_ERROR_XPC_NOT_ENOUGH_ARGS, cx);
}
if (!args[0].isObject()) {
args.rval().set(args[0]);
return true;
}
args.rval().setObject(*js::UncheckedUnwrap(&args[0].toObject()));
return JS_WrapValue(cx, args.rval());
}
// static
bool
AttachNewConstructorObject(JSContext* aCx, JS::HandleObject aGlobalObject)
{
// Pushing a JSContext calls ActivateDebugger which calls this function, so
// we can't use an AutoJSContext here until JSD is gone.
JSAutoCompartment ac(aCx, aGlobalObject);
JSFunction* xpcnativewrapper =
JS_DefineFunction(aCx, aGlobalObject, "XPCNativeWrapper",
XrayWrapperConstructor, 1,
JSPROP_READONLY | JSPROP_PERMANENT | JSFUN_STUB_GSOPS | JSFUN_CONSTRUCTOR);
if (!xpcnativewrapper) {
return false;
}
JS::RootedObject obj(aCx, JS_GetFunctionObject(xpcnativewrapper));
return JS_DefineFunction(aCx, obj, "unwrap", UnwrapNW, 1,
JSPROP_READONLY | JSPROP_PERMANENT) != nullptr;
}
} // namespace XPCNativeWrapper
namespace XPCWrapper {
JSObject*
UnsafeUnwrapSecurityWrapper(JSObject* obj)
{
if (js::IsProxy(obj)) {
return js::UncheckedUnwrap(obj);
}
return obj;
}
} // namespace XPCWrapper
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