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
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* 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/. */
#ifndef _xpc_WRAPPERFACTORY_H
#define _xpc_WRAPPERFACTORY_H
#include "jswrapper.h"
namespace xpc {
class WrapperFactory {
public:
enum { WAIVE_XRAY_WRAPPER_FLAG = js::Wrapper::LAST_USED_FLAG << 1,
IS_XRAY_WRAPPER_FLAG = WAIVE_XRAY_WRAPPER_FLAG << 1 };
// Return true if any of any of the nested wrappers have the flag set.
static bool HasWrapperFlag(JSObject* wrapper, unsigned flag) {
unsigned flags = 0;
js::UncheckedUnwrap(wrapper, true, &flags);
return !!(flags & flag);
}
static bool IsXrayWrapper(JSObject* wrapper) {
return HasWrapperFlag(wrapper, IS_XRAY_WRAPPER_FLAG);
}
static bool HasWaiveXrayFlag(JSObject* wrapper) {
return HasWrapperFlag(wrapper, WAIVE_XRAY_WRAPPER_FLAG);
}
static bool IsCOW(JSObject* wrapper);
static JSObject* GetXrayWaiver(JS::HandleObject obj);
static JSObject* CreateXrayWaiver(JSContext* cx, JS::HandleObject obj);
static JSObject* WaiveXray(JSContext* cx, JSObject* obj);
// Computes whether we should allow the creation of an Xray waiver from
// |target| to |origin|.
static bool AllowWaiver(JSCompartment* target, JSCompartment* origin);
// Convenience method for the above, operating on a wrapper.
static bool AllowWaiver(JSObject* wrapper);
// Prepare a given object for wrapping in a new compartment.
static void PrepareForWrapping(JSContext* cx,
JS::HandleObject scope,
JS::HandleObject obj,
JS::HandleObject objectPassedToWrap,
JS::MutableHandleObject retObj);
// Rewrap an object that is about to cross compartment boundaries.
static JSObject* Rewrap(JSContext* cx,
JS::HandleObject existing,
JS::HandleObject obj);
// Wrap wrapped object into a waiver wrapper and then re-wrap it.
static bool WaiveXrayAndWrap(JSContext* cx, JS::MutableHandleValue vp);
static bool WaiveXrayAndWrap(JSContext* cx, JS::MutableHandleObject object);
};
extern const js::Wrapper XrayWaiver;
} // namespace xpc
#endif /* _xpc_WRAPPERFACTORY_H */
|
