forked from mozilla/gecko-dev
-
Notifications
You must be signed in to change notification settings - Fork 2
/
jscntxtinlines.h
423 lines (366 loc) · 11.5 KB
/
jscntxtinlines.h
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
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: set ts=4 sw=4 et tw=78:
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is SpiderMonkey code.
*
* The Initial Developer of the Original Code is
* Mozilla Corporation.
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Jeff Walden <jwalden+code@mit.edu> (original author)
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef jscntxtinlines_h___
#define jscntxtinlines_h___
#include "jscntxt.h"
#include "jscompartment.h"
#include "jsstaticcheck.h"
#include "jsxml.h"
#include "jsregexp.h"
#include "jsgc.h"
namespace js {
static inline GlobalObject *
GetGlobalForScopeChain(JSContext *cx)
{
/*
* This is essentially GetScopeChain(cx)->getGlobal(), but without
* falling off trace.
*
* This use of cx->fp, possibly on trace, is deliberate:
* cx->fp->scopeChain->getGlobal() returns the same object whether we're on
* trace or not, since we do not trace calls across global objects.
*/
VOUCH_DOES_NOT_REQUIRE_STACK();
if (cx->running())
return cx->fp()->scopeChain().getGlobal();
JSObject *scope = cx->globalObject;
if (!scope) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_INACTIVE);
return NULL;
}
OBJ_TO_INNER_OBJECT(cx, scope);
return scope->asGlobal();
}
inline GSNCache *
GetGSNCache(JSContext *cx)
{
return &JS_THREAD_DATA(cx)->gsnCache;
}
class AutoNamespaceArray : protected AutoGCRooter {
public:
AutoNamespaceArray(JSContext *cx) : AutoGCRooter(cx, NAMESPACES) {
array.init();
}
~AutoNamespaceArray() {
array.finish(context);
}
uint32 length() const { return array.length; }
public:
friend void AutoGCRooter::trace(JSTracer *trc);
JSXMLArray array;
};
#ifdef DEBUG
class CompartmentChecker
{
private:
JSContext *context;
JSCompartment *compartment;
public:
explicit CompartmentChecker(JSContext *cx) : context(cx), compartment(cx->compartment) {
check(cx->running() ? JS_GetGlobalForScopeChain(cx) : cx->globalObject);
VOUCH_DOES_NOT_REQUIRE_STACK();
}
/*
* Set a breakpoint here (break js::CompartmentChecker::fail) to debug
* compartment mismatches.
*/
static void fail(JSCompartment *c1, JSCompartment *c2) {
printf("*** Compartment mismatch %p vs. %p\n", (void *) c1, (void *) c2);
JS_NOT_REACHED("compartment mismatched");
}
/* Note: should only be used when neither c1 nor c2 may be the default compartment. */
static void check(JSCompartment *c1, JSCompartment *c2) {
JS_ASSERT(c1 != c1->rt->atomsCompartment);
JS_ASSERT(c2 != c2->rt->atomsCompartment);
if (c1 != c2)
fail(c1, c2);
}
void check(JSCompartment *c) {
if (c && c != context->runtime->atomsCompartment) {
if (!compartment)
compartment = c;
else if (c != compartment)
fail(compartment, c);
}
}
void check(JSPrincipals *) { /* nothing for now */ }
void check(JSObject *obj) {
if (obj)
check(obj->compartment());
}
void check(JSString *str) {
if (!str->isAtom())
check(str->compartment());
}
void check(const js::Value &v) {
if (v.isObject())
check(&v.toObject());
else if (v.isString())
check(v.toString());
}
void check(jsval v) {
check(Valueify(v));
}
void check(const ValueArray &arr) {
for (size_t i = 0; i < arr.length; i++)
check(arr.array[i]);
}
void check(const JSValueArray &arr) {
for (size_t i = 0; i < arr.length; i++)
check(arr.array[i]);
}
void check(jsid id) {
if (JSID_IS_OBJECT(id))
check(JSID_TO_OBJECT(id));
}
void check(JSIdArray *ida) {
if (ida) {
for (jsint i = 0; i < ida->length; i++) {
if (JSID_IS_OBJECT(ida->vector[i]))
check(ida->vector[i]);
}
}
}
void check(JSScript *script) {
if (script) {
check(script->compartment);
if (script->u.object)
check(script->u.object);
}
}
void check(StackFrame *fp) {
check(&fp->scopeChain());
}
};
#endif
/*
* Don't perform these checks when called from a finalizer. The checking
* depends on other objects not having been swept yet.
*/
#define START_ASSERT_SAME_COMPARTMENT() \
if (cx->runtime->gcRunning) \
return; \
CompartmentChecker c(cx)
template <class T1> inline void
assertSameCompartment(JSContext *cx, T1 t1)
{
#ifdef DEBUG
START_ASSERT_SAME_COMPARTMENT();
c.check(t1);
#endif
}
template <class T1, class T2> inline void
assertSameCompartment(JSContext *cx, T1 t1, T2 t2)
{
#ifdef DEBUG
START_ASSERT_SAME_COMPARTMENT();
c.check(t1);
c.check(t2);
#endif
}
template <class T1, class T2, class T3> inline void
assertSameCompartment(JSContext *cx, T1 t1, T2 t2, T3 t3)
{
#ifdef DEBUG
START_ASSERT_SAME_COMPARTMENT();
c.check(t1);
c.check(t2);
c.check(t3);
#endif
}
template <class T1, class T2, class T3, class T4> inline void
assertSameCompartment(JSContext *cx, T1 t1, T2 t2, T3 t3, T4 t4)
{
#ifdef DEBUG
START_ASSERT_SAME_COMPARTMENT();
c.check(t1);
c.check(t2);
c.check(t3);
c.check(t4);
#endif
}
template <class T1, class T2, class T3, class T4, class T5> inline void
assertSameCompartment(JSContext *cx, T1 t1, T2 t2, T3 t3, T4 t4, T5 t5)
{
#ifdef DEBUG
START_ASSERT_SAME_COMPARTMENT();
c.check(t1);
c.check(t2);
c.check(t3);
c.check(t4);
c.check(t5);
#endif
}
#undef START_ASSERT_SAME_COMPARTMENT
STATIC_PRECONDITION_ASSUME(ubound(vp) >= argc + 2)
JS_ALWAYS_INLINE bool
CallJSNative(JSContext *cx, js::Native native, uintN argc, js::Value *vp)
{
#ifdef DEBUG
JSBool alreadyThrowing = cx->isExceptionPending();
#endif
assertSameCompartment(cx, ValueArray(vp, argc + 2));
JSBool ok = native(cx, argc, vp);
if (ok) {
assertSameCompartment(cx, vp[0]);
JS_ASSERT_IF(!alreadyThrowing, !cx->isExceptionPending());
}
return ok;
}
extern JSBool CallOrConstructBoundFunction(JSContext *, uintN, js::Value *);
STATIC_PRECONDITION(ubound(vp) >= argc + 2)
JS_ALWAYS_INLINE bool
CallJSNativeConstructor(JSContext *cx, js::Native native, uintN argc, js::Value *vp)
{
#ifdef DEBUG
JSObject *callee = &vp[0].toObject();
#endif
JS_ASSERT(vp[1].isMagic());
if (!CallJSNative(cx, native, argc, vp))
return false;
/*
* Native constructors must return non-primitive values on success.
* Although it is legal, if a constructor returns the callee, there is a
* 99.9999% chance it is a bug. If any valid code actually wants the
* constructor to return the callee, the assertion can be removed or
* (another) conjunct can be added to the antecedent.
*
* Proxies are exceptions to both rules: they can return primitives and
* they allow content to return the callee.
*
* CallOrConstructBoundFunction is an exception as well because we
* might have used bind on a proxy function.
*
* (new Object(Object)) returns the callee.
*/
extern JSBool proxy_Construct(JSContext *, uintN, Value *);
JS_ASSERT_IF(native != proxy_Construct && native != js::CallOrConstructBoundFunction &&
(!callee->isFunction() || callee->getFunctionPrivate()->u.n.clasp != &js_ObjectClass),
!vp->isPrimitive() && callee != &vp[0].toObject());
return true;
}
JS_ALWAYS_INLINE bool
CallJSPropertyOp(JSContext *cx, js::PropertyOp op, JSObject *receiver, jsid id, js::Value *vp)
{
assertSameCompartment(cx, receiver, id, *vp);
JSBool ok = op(cx, receiver, id, vp);
if (ok)
assertSameCompartment(cx, receiver, *vp);
return ok;
}
JS_ALWAYS_INLINE bool
CallJSPropertyOpSetter(JSContext *cx, js::StrictPropertyOp op, JSObject *obj, jsid id,
JSBool strict, js::Value *vp)
{
assertSameCompartment(cx, obj, id, *vp);
return op(cx, obj, id, strict, vp);
}
inline bool
CallSetter(JSContext *cx, JSObject *obj, jsid id, js::StrictPropertyOp op, uintN attrs,
uintN shortid, JSBool strict, js::Value *vp)
{
if (attrs & JSPROP_SETTER)
return ExternalGetOrSet(cx, obj, id, CastAsObjectJsval(op), JSACC_WRITE, 1, vp, vp);
if (attrs & JSPROP_GETTER)
return js_ReportGetterOnlyAssignment(cx);
if (attrs & JSPROP_SHORTID)
id = INT_TO_JSID(shortid);
return CallJSPropertyOpSetter(cx, op, obj, id, strict, vp);
}
#ifdef JS_TRACER
/*
* Reconstruct the JS stack and clear cx->tracecx. We must be currently in a
* _FAIL builtin from trace on cx or another context on the same thread. The
* machine code for the trace remains on the C stack when js_DeepBail returns.
*
* Implemented in jstracer.cpp.
*/
JS_FORCES_STACK JS_FRIEND_API(void)
DeepBail(JSContext *cx);
#endif
static JS_INLINE void
LeaveTraceIfGlobalObject(JSContext *cx, JSObject *obj)
{
if (!obj->parent)
LeaveTrace(cx);
}
static JS_INLINE void
LeaveTraceIfArgumentsObject(JSContext *cx, JSObject *obj)
{
if (obj->isArguments())
LeaveTrace(cx);
}
static JS_INLINE JSBool
CanLeaveTrace(JSContext *cx)
{
JS_ASSERT(JS_ON_TRACE(cx));
#ifdef JS_TRACER
return JS_TRACE_MONITOR_ON_TRACE(cx)->bailExit != NULL;
#else
return JS_FALSE;
#endif
}
} /* namespace js */
#ifdef JS_METHODJIT
inline js::mjit::JaegerCompartment *JSContext::jaegerCompartment()
{
return compartment->jaegerCompartment;
}
#endif
inline bool
JSContext::ensureGeneratorStackSpace()
{
bool ok = genStack.reserve(genStack.length() + 1);
if (!ok)
js_ReportOutOfMemory(this);
return ok;
}
inline js::RegExpStatics *
JSContext::regExpStatics()
{
return js::RegExpStatics::extractFrom(js::GetGlobalForScopeChain(this));
}
inline void
JSContext::setPendingException(js::Value v) {
this->throwing = true;
this->exception = v;
assertSameCompartment(this, v);
}
#endif /* jscntxtinlines_h___ */