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
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
/* -*- 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 "mozilla/dom/SimpleGlobalObject.h"
#include "jsapi.h"
#include "js/Class.h"
#include "nsJSPrincipals.h"
#include "nsNullPrincipal.h"
#include "nsThreadUtils.h"
#include "nsContentUtils.h"
#include "xpcprivate.h"
#include "mozilla/dom/ScriptSettings.h"
namespace mozilla {
namespace dom {
NS_IMPL_CYCLE_COLLECTION_CLASS(SimpleGlobalObject)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(SimpleGlobalObject)
NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
tmp->UnlinkHostObjectURIs();
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(SimpleGlobalObject)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
tmp->TraverseHostObjectURIs(cb);
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(SimpleGlobalObject)
NS_IMPL_CYCLE_COLLECTING_ADDREF(SimpleGlobalObject)
NS_IMPL_CYCLE_COLLECTING_RELEASE(SimpleGlobalObject)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(SimpleGlobalObject)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY(nsIGlobalObject)
NS_INTERFACE_MAP_END
static void
SimpleGlobal_finalize(js::FreeOp *fop, JSObject *obj)
{
SimpleGlobalObject* globalObject =
static_cast<SimpleGlobalObject*>(JS_GetPrivate(obj));
NS_RELEASE(globalObject);
}
static void
SimpleGlobal_moved(JSObject *obj, const JSObject *old)
{
SimpleGlobalObject* globalObject =
static_cast<SimpleGlobalObject*>(JS_GetPrivate(obj));
globalObject->UpdateWrapper(obj, old);
}
static const js::ClassOps SimpleGlobalClassOps = {
nullptr,
nullptr,
nullptr,
nullptr,
JS_EnumerateStandardClasses,
JS_ResolveStandardClass,
JS_MayResolveStandardClass,
SimpleGlobal_finalize,
nullptr,
nullptr,
nullptr,
JS_GlobalObjectTraceHook,
};
static const js::ClassExtension SimpleGlobalClassExtension = {
nullptr,
SimpleGlobal_moved
};
const js::Class SimpleGlobalClass = {
"",
JSCLASS_GLOBAL_FLAGS |
JSCLASS_HAS_PRIVATE |
JSCLASS_PRIVATE_IS_NSISUPPORTS |
JSCLASS_FOREGROUND_FINALIZE,
&SimpleGlobalClassOps,
JS_NULL_CLASS_SPEC,
&SimpleGlobalClassExtension,
JS_NULL_OBJECT_OPS
};
// static
JSObject*
SimpleGlobalObject::Create(GlobalType globalType, JS::Handle<JS::Value> proto)
{
// We can't root our return value with our AutoJSAPI because the rooting
// analysis thinks ~AutoJSAPI can GC. So we need to root in a scope outside
// the lifetime of the AutoJSAPI.
JS::Rooted<JSObject*> global(RootingCx());
{ // Scope to ensure the AutoJSAPI destructor runs before we end up returning
AutoJSAPI jsapi;
jsapi.Init();
JSContext* cx = jsapi.cx();
JS::CompartmentOptions options;
options.creationOptions().setInvisibleToDebugger(true);
if (NS_IsMainThread()) {
nsCOMPtr<nsIPrincipal> principal = nsNullPrincipal::Create();
options.creationOptions().setTrace(xpc::TraceXPCGlobal);
global = xpc::CreateGlobalObject(cx, js::Jsvalify(&SimpleGlobalClass),
nsJSPrincipals::get(principal),
options);
} else {
global = JS_NewGlobalObject(cx, js::Jsvalify(&SimpleGlobalClass),
nullptr,
JS::DontFireOnNewGlobalHook, options);
}
if (!global) {
jsapi.ClearException();
return nullptr;
}
JSAutoCompartment ac(cx, global);
// It's important to create the nsIGlobalObject for our new global before we
// start trying to wrap things like the prototype into its compartment,
// because the wrap operation relies on the global having its
// nsIGlobalObject already.
RefPtr<SimpleGlobalObject> globalObject =
new SimpleGlobalObject(global, globalType);
// Pass on ownership of globalObject to |global|.
JS_SetPrivate(global, globalObject.forget().take());
if (proto.isObjectOrNull()) {
JS::Rooted<JSObject*> protoObj(cx, proto.toObjectOrNull());
if (!JS_WrapObject(cx, &protoObj)) {
jsapi.ClearException();
return nullptr;
}
if (!JS_SplicePrototype(cx, global, protoObj)) {
jsapi.ClearException();
return nullptr;
}
} else if (!proto.isUndefined()) {
// Bogus proto.
return nullptr;
}
JS_FireOnNewGlobalObject(cx, global);
}
return global;
}
// static
SimpleGlobalObject::GlobalType
SimpleGlobalObject::SimpleGlobalType(JSObject* obj)
{
if (js::GetObjectClass(obj) != &SimpleGlobalClass) {
return SimpleGlobalObject::GlobalType::NotSimpleGlobal;
}
SimpleGlobalObject* globalObject =
static_cast<SimpleGlobalObject*>(JS_GetPrivate(obj));
return globalObject->Type();
}
} // namespace mozilla
} // namespace dom
|
