js/src/vm/ProxyObject.h@129ffea94266
js/src/vm/ProxyObject.h
Sat, 03 Jan 2015 20:18:00 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Sat, 03 Jan 2015 20:18:00 +0100
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
- permissions
- -rw-r--r--
Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.
1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2 * vim: set ts=8 sts=4 et sw=4 tw=99:
3 * This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
7 #ifndef vm_ProxyObject_h
8 #define vm_ProxyObject_h
10 #include "jsobj.h"
11 #include "jsproxy.h"
13 namespace js {
15 // This is the base class for the various kinds of proxy objects. It's never
16 // instantiated.
17 class ProxyObject : public JSObject
18 {
19 // These are just local renamings of the slot constants that are part of
20 // the API in jsproxy.h.
21 static const uint32_t PRIVATE_SLOT = PROXY_PRIVATE_SLOT;
22 static const uint32_t HANDLER_SLOT = PROXY_HANDLER_SLOT;
23 static const uint32_t EXTRA_SLOT = PROXY_EXTRA_SLOT;
25 public:
26 static ProxyObject *New(JSContext *cx, BaseProxyHandler *handler, HandleValue priv,
27 TaggedProto proto_, JSObject *parent_,
28 const ProxyOptions &options);
30 const Value &private_() {
31 return GetReservedSlot(this, PRIVATE_SLOT);
32 }
34 void initCrossCompartmentPrivate(HandleValue priv);
36 HeapSlot *slotOfPrivate() {
37 return &getReservedSlotRef(PRIVATE_SLOT);
38 }
40 JSObject *target() const {
41 return const_cast<ProxyObject*>(this)->private_().toObjectOrNull();
42 }
44 BaseProxyHandler *handler() {
45 return static_cast<BaseProxyHandler*>(GetReservedSlot(this, HANDLER_SLOT).toPrivate());
46 }
48 void initHandler(BaseProxyHandler *handler);
50 void setHandler(BaseProxyHandler *handler) {
51 SetReservedSlot(this, HANDLER_SLOT, PrivateValue(handler));
52 }
54 static size_t offsetOfHandler() {
55 return getFixedSlotOffset(HANDLER_SLOT);
56 }
58 const Value &extra(size_t n) const {
59 JS_ASSERT(n == 0 || n == 1);
60 return GetReservedSlot(const_cast<ProxyObject*>(this), EXTRA_SLOT + n);
61 }
63 void setExtra(size_t n, const Value &extra) {
64 JS_ASSERT(n == 0 || n == 1);
65 SetReservedSlot(this, EXTRA_SLOT + n, extra);
66 }
68 private:
69 HeapSlot *slotOfExtra(size_t n) {
70 JS_ASSERT(n == 0 || n == 1);
71 return &getReservedSlotRef(EXTRA_SLOT + n);
72 }
74 HeapSlot *slotOfClassSpecific(size_t n) {
75 JS_ASSERT(n >= PROXY_MINIMUM_SLOTS);
76 JS_ASSERT(n < JSCLASS_RESERVED_SLOTS(getClass()));
77 return &getReservedSlotRef(n);
78 }
80 static bool isValidProxyClass(const Class *clasp) {
81 // Since we can take classes from the outside, make sure that they
82 // are "sane". They have to quack enough like proxies for us to belive
83 // they should be treated as such.
85 // proxy_Trace is just a trivial wrapper around ProxyObject::trace for
86 // friend api exposure.
87 return clasp->isProxy() &&
88 (clasp->flags & JSCLASS_IMPLEMENTS_BARRIERS) &&
89 clasp->trace == proxy_Trace &&
90 JSCLASS_RESERVED_SLOTS(clasp) >= PROXY_MINIMUM_SLOTS;
91 }
93 public:
94 static unsigned grayLinkSlot(JSObject *obj);
96 void renew(JSContext *cx, BaseProxyHandler *handler, Value priv);
98 static void trace(JSTracer *trc, JSObject *obj);
100 void nuke(BaseProxyHandler *handler);
102 static const Class callableClass_;
103 static const Class uncallableClass_;
104 };
106 } // namespace js
108 // Note: the following |JSObject::is<T>| methods are implemented in terms of
109 // the Is*Proxy() friend API functions to ensure the implementations are tied
110 // together. The exception is |JSObject::is<js::OuterWindowProxyObject>()
111 // const|, which uses the standard template definition, because there is no
112 // IsOuterWindowProxy() function in the friend API.
114 template<>
115 inline bool
116 JSObject::is<js::ProxyObject>() const
117 {
118 return js::IsProxy(const_cast<JSObject*>(this));
119 }
121 #endif /* vm_ProxyObject_h */
