1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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
|
