1 : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2 : *
3 : * ***** BEGIN LICENSE BLOCK *****
4 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
5 : *
6 : * The contents of this file are subject to the Mozilla Public License Version
7 : * 1.1 (the "License"); you may not use this file except in compliance with
8 : * the License. You may obtain a copy of the License at
9 : * http://www.mozilla.org/MPL/
10 : *
11 : * Software distributed under the License is distributed on an "AS IS" basis,
12 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
13 : * for the specific language governing rights and limitations under the
14 : * License.
15 : *
16 : * The Original Code is Mozilla Communicator client code, released
17 : * March 31, 1998.
18 : *
19 : * The Initial Developer of the Original Code is
20 : * Netscape Communications Corporation.
21 : * Portions created by the Initial Developer are Copyright (C) 1998
22 : * the Initial Developer. All Rights Reserved.
23 : *
24 : * Contributor(s):
25 : *
26 : * Alternatively, the contents of this file may be used under the terms of
27 : * either of the GNU General Public License Version 2 or later (the "GPL"),
28 : * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
29 : * in which case the provisions of the GPL or the LGPL are applicable instead
30 : * of those above. If you wish to allow use of your version of this file only
31 : * under the terms of either the GPL or the LGPL, and not to allow others to
32 : * use your version of this file under the terms of the MPL, indicate your
33 : * decision by deleting the provisions above and replace them with the notice
34 : * and other provisions required by the GPL or the LGPL. If you do not delete
35 : * the provisions above, a recipient may use your version of this file under
36 : * the terms of any one of the MPL, the GPL or the LGPL.
37 : *
38 : * ***** END LICENSE BLOCK ***** */
39 :
40 : /*
41 : * JS atom table.
42 : */
43 : #include <stdlib.h>
44 : #include <string.h>
45 :
46 : #include "mozilla/RangedPtr.h"
47 : #include "mozilla/Util.h"
48 :
49 : #include "jstypes.h"
50 : #include "jsutil.h"
51 : #include "jshash.h"
52 : #include "jsprf.h"
53 : #include "jsapi.h"
54 : #include "jsatom.h"
55 : #include "jscntxt.h"
56 : #include "jsgc.h"
57 : #include "jsgcmark.h"
58 : #include "jslock.h"
59 : #include "jsnum.h"
60 : #include "jsstr.h"
61 : #include "jsversion.h"
62 : #include "jsxml.h"
63 :
64 : #include "frontend/Parser.h"
65 :
66 : #include "jsstrinlines.h"
67 : #include "jsatominlines.h"
68 : #include "jsobjinlines.h"
69 :
70 : #include "vm/String-inl.h"
71 :
72 : using namespace mozilla;
73 : using namespace js;
74 : using namespace js::gc;
75 :
76 : const size_t JSAtomState::commonAtomsOffset = offsetof(JSAtomState, emptyAtom);
77 : const size_t JSAtomState::lazyAtomsOffset = offsetof(JSAtomState, lazy);
78 :
79 : /*
80 : * ATOM_HASH assumes that JSHashNumber is 32-bit even on 64-bit systems.
81 : */
82 : JS_STATIC_ASSERT(sizeof(JSHashNumber) == 4);
83 : JS_STATIC_ASSERT(sizeof(JSAtom *) == JS_BYTES_PER_WORD);
84 :
85 : const char *
86 21994 : js_AtomToPrintableString(JSContext *cx, JSAtom *atom, JSAutoByteString *bytes)
87 : {
88 21994 : return js_ValueToPrintable(cx, StringValue(atom), bytes);
89 : }
90 :
91 : #define JS_PROTO(name,code,init) const char js_##name##_str[] = #name;
92 : #include "jsproto.tbl"
93 : #undef JS_PROTO
94 :
95 : /*
96 : * String constants for common atoms defined in JSAtomState starting from
97 : * JSAtomState.emptyAtom until JSAtomState.lazy.
98 : *
99 : * The elements of the array after the first empty string define strings
100 : * corresponding to the two boolean literals, false and true, followed by the
101 : * JSType enumerators from jspubtd.h starting with "undefined" for JSTYPE_VOID
102 : * (which is special-value 2) and continuing as initialized below. The static
103 : * asserts check these relations.
104 : */
105 : JS_STATIC_ASSERT(JSTYPE_LIMIT == 8);
106 : JS_STATIC_ASSERT(JSTYPE_VOID == 0);
107 :
108 : const char *const js_common_atom_names[] = {
109 : "", /* emptyAtom */
110 : js_false_str, /* booleanAtoms[0] */
111 : js_true_str, /* booleanAtoms[1] */
112 : js_undefined_str, /* typeAtoms[JSTYPE_VOID] */
113 : js_object_str, /* typeAtoms[JSTYPE_OBJECT] */
114 : js_function_str, /* typeAtoms[JSTYPE_FUNCTION] */
115 : "string", /* typeAtoms[JSTYPE_STRING] */
116 : "number", /* typeAtoms[JSTYPE_NUMBER] */
117 : "boolean", /* typeAtoms[JSTYPE_BOOLEAN] */
118 : js_null_str, /* typeAtoms[JSTYPE_NULL] */
119 : "xml", /* typeAtoms[JSTYPE_XML] */
120 : js_null_str, /* nullAtom */
121 :
122 : #define JS_PROTO(name,code,init) js_##name##_str,
123 : #include "jsproto.tbl"
124 : #undef JS_PROTO
125 :
126 : js_anonymous_str, /* anonymousAtom */
127 : js_apply_str, /* applyAtom */
128 : js_arguments_str, /* argumentsAtom */
129 : js_arity_str, /* arityAtom */
130 : js_BYTES_PER_ELEMENT_str, /* BYTES_PER_ELEMENTAtom */
131 : js_call_str, /* callAtom */
132 : js_callee_str, /* calleeAtom */
133 : js_caller_str, /* callerAtom */
134 : js_class_prototype_str, /* classPrototypeAtom */
135 : js_constructor_str, /* constructorAtom */
136 : js_each_str, /* eachAtom */
137 : js_eval_str, /* evalAtom */
138 : js_fileName_str, /* fileNameAtom */
139 : js_get_str, /* getAtom */
140 : js_global_str, /* globalAtom */
141 : js_ignoreCase_str, /* ignoreCaseAtom */
142 : js_index_str, /* indexAtom */
143 : js_input_str, /* inputAtom */
144 : "toISOString", /* toISOStringAtom */
145 : js_iterator_str, /* iteratorAtom */
146 : js_join_str, /* joinAtom */
147 : js_lastIndex_str, /* lastIndexAtom */
148 : js_length_str, /* lengthAtom */
149 : js_lineNumber_str, /* lineNumberAtom */
150 : js_message_str, /* messageAtom */
151 : js_multiline_str, /* multilineAtom */
152 : js_name_str, /* nameAtom */
153 : js_next_str, /* nextAtom */
154 : js_noSuchMethod_str, /* noSuchMethodAtom */
155 : "[object Null]", /* objectNullAtom */
156 : "[object Undefined]", /* objectUndefinedAtom */
157 : "of", /* ofAtom */
158 : js_proto_str, /* protoAtom */
159 : js_set_str, /* setAtom */
160 : js_source_str, /* sourceAtom */
161 : js_stack_str, /* stackAtom */
162 : js_sticky_str, /* stickyAtom */
163 : js_toGMTString_str, /* toGMTStringAtom */
164 : js_toLocaleString_str, /* toLocaleStringAtom */
165 : js_toSource_str, /* toSourceAtom */
166 : js_toString_str, /* toStringAtom */
167 : js_toUTCString_str, /* toUTCStringAtom */
168 : js_valueOf_str, /* valueOfAtom */
169 : js_toJSON_str, /* toJSONAtom */
170 : "(void 0)", /* void0Atom */
171 : js_enumerable_str, /* enumerableAtom */
172 : js_configurable_str, /* configurableAtom */
173 : js_writable_str, /* writableAtom */
174 : js_value_str, /* valueAtom */
175 : js_test_str, /* testAtom */
176 : "use strict", /* useStrictAtom */
177 : "loc", /* locAtom */
178 : "line", /* lineAtom */
179 : "Infinity", /* InfinityAtom */
180 : "NaN", /* NaNAtom */
181 : "builder", /* builderAtom */
182 :
183 : #if JS_HAS_XML_SUPPORT
184 : js_etago_str, /* etagoAtom */
185 : js_namespace_str, /* namespaceAtom */
186 : js_ptagc_str, /* ptagcAtom */
187 : js_qualifier_str, /* qualifierAtom */
188 : js_space_str, /* spaceAtom */
189 : js_stago_str, /* stagoAtom */
190 : js_star_str, /* starAtom */
191 : js_starQualifier_str, /* starQualifierAtom */
192 : js_tagc_str, /* tagcAtom */
193 : js_xml_str, /* xmlAtom */
194 : "@mozilla.org/js/function", /* functionNamespaceURIAtom */
195 : #endif
196 :
197 : "Proxy", /* ProxyAtom */
198 :
199 : "getOwnPropertyDescriptor", /* getOwnPropertyDescriptorAtom */
200 : "getPropertyDescriptor", /* getPropertyDescriptorAtom */
201 : "defineProperty", /* definePropertyAtom */
202 : "delete", /* deleteAtom */
203 : "getOwnPropertyNames", /* getOwnPropertyNames */
204 : "enumerate", /* enumerateAtom */
205 : "fix", /* fixAtom */
206 :
207 : "has", /* hasAtom */
208 : "hasOwn", /* hasOwnAtom */
209 : "keys", /* keysAtom */
210 : "iterate", /* iterateAtom */
211 :
212 : "WeakMap", /* WeakMapAtom */
213 :
214 : "byteLength", /* byteLengthAtom */
215 :
216 : "return", /* returnAtom */
217 : "throw" /* throwAtom */
218 : };
219 :
220 : void
221 0 : JSAtomState::checkStaticInvariants()
222 : {
223 : /*
224 : * Start and limit offsets for atom pointers in JSAtomState must be aligned
225 : * on the word boundary.
226 : */
227 : JS_STATIC_ASSERT(commonAtomsOffset % sizeof(JSAtom *) == 0);
228 : JS_STATIC_ASSERT(sizeof(*this) % sizeof(JSAtom *) == 0);
229 :
230 : /*
231 : * JS_BOOLEAN_STR and JS_TYPE_STR assume that boolean names starts from the
232 : * index 1 and type name starts from the index 1+2 atoms in JSAtomState.
233 : */
234 : JS_STATIC_ASSERT(1 * sizeof(JSAtom *) ==
235 : offsetof(JSAtomState, booleanAtoms) - commonAtomsOffset);
236 : JS_STATIC_ASSERT((1 + 2) * sizeof(JSAtom *) ==
237 : offsetof(JSAtomState, typeAtoms) - commonAtomsOffset);
238 :
239 : JS_STATIC_ASSERT(JS_ARRAY_LENGTH(js_common_atom_names) * sizeof(JSAtom *) ==
240 : lazyAtomsOffset - commonAtomsOffset);
241 0 : }
242 :
243 : /*
244 : * Interpreter macros called by the trace recorder assume common atom indexes
245 : * fit in one byte of immediate operand.
246 : */
247 : JS_STATIC_ASSERT(JS_ARRAY_LENGTH(js_common_atom_names) < 256);
248 :
249 : const size_t js_common_atom_count = JS_ARRAY_LENGTH(js_common_atom_names);
250 :
251 : const char js_anonymous_str[] = "anonymous";
252 : const char js_apply_str[] = "apply";
253 : const char js_arguments_str[] = "arguments";
254 : const char js_arity_str[] = "arity";
255 : const char js_BYTES_PER_ELEMENT_str[] = "BYTES_PER_ELEMENT";
256 : const char js_call_str[] = "call";
257 : const char js_callee_str[] = "callee";
258 : const char js_caller_str[] = "caller";
259 : const char js_class_prototype_str[] = "prototype";
260 : const char js_constructor_str[] = "constructor";
261 : const char js_each_str[] = "each";
262 : const char js_eval_str[] = "eval";
263 : const char js_fileName_str[] = "fileName";
264 : const char js_get_str[] = "get";
265 : const char js_getter_str[] = "getter";
266 : const char js_global_str[] = "global";
267 : const char js_ignoreCase_str[] = "ignoreCase";
268 : const char js_index_str[] = "index";
269 : const char js_input_str[] = "input";
270 : const char js_iterator_str[] = "__iterator__";
271 : const char js_join_str[] = "join";
272 : const char js_lastIndex_str[] = "lastIndex";
273 : const char js_length_str[] = "length";
274 : const char js_lineNumber_str[] = "lineNumber";
275 : const char js_message_str[] = "message";
276 : const char js_multiline_str[] = "multiline";
277 : const char js_name_str[] = "name";
278 : const char js_next_str[] = "next";
279 : const char js_noSuchMethod_str[] = "__noSuchMethod__";
280 : const char js_object_str[] = "object";
281 : const char js_proto_str[] = "__proto__";
282 : const char js_setter_str[] = "setter";
283 : const char js_set_str[] = "set";
284 : const char js_source_str[] = "source";
285 : const char js_stack_str[] = "stack";
286 : const char js_sticky_str[] = "sticky";
287 : const char js_toGMTString_str[] = "toGMTString";
288 : const char js_toLocaleString_str[] = "toLocaleString";
289 : const char js_toSource_str[] = "toSource";
290 : const char js_toString_str[] = "toString";
291 : const char js_toUTCString_str[] = "toUTCString";
292 : const char js_undefined_str[] = "undefined";
293 : const char js_valueOf_str[] = "valueOf";
294 : const char js_toJSON_str[] = "toJSON";
295 : const char js_enumerable_str[] = "enumerable";
296 : const char js_configurable_str[] = "configurable";
297 : const char js_writable_str[] = "writable";
298 : const char js_value_str[] = "value";
299 : const char js_test_str[] = "test";
300 :
301 : #if JS_HAS_XML_SUPPORT
302 : const char js_etago_str[] = "</";
303 : const char js_namespace_str[] = "namespace";
304 : const char js_ptagc_str[] = "/>";
305 : const char js_qualifier_str[] = "::";
306 : const char js_space_str[] = " ";
307 : const char js_stago_str[] = "<";
308 : const char js_star_str[] = "*";
309 : const char js_starQualifier_str[] = "*::";
310 : const char js_tagc_str[] = ">";
311 : const char js_xml_str[] = "xml";
312 : #endif
313 :
314 : #if JS_HAS_GENERATORS
315 : const char js_close_str[] = "close";
316 : const char js_send_str[] = "send";
317 : #endif
318 :
319 : /*
320 : * For a browser build from 2007-08-09 after the browser starts up there are
321 : * just 55 double atoms, but over 15000 string atoms. Not to penalize more
322 : * economical embeddings allocating too much memory initially we initialize
323 : * atomized strings with just 1K entries.
324 : */
325 : #define JS_STRING_HASH_COUNT 1024
326 :
327 : JSBool
328 19910 : js_InitAtomState(JSRuntime *rt)
329 : {
330 19910 : JSAtomState *state = &rt->atomState;
331 :
332 19910 : JS_ASSERT(!state->atoms.initialized());
333 19910 : if (!state->atoms.init(JS_STRING_HASH_COUNT))
334 0 : return false;
335 :
336 19910 : JS_ASSERT(state->atoms.initialized());
337 19910 : return true;
338 : }
339 :
340 : void
341 19908 : js_FinishAtomState(JSRuntime *rt)
342 : {
343 19908 : JSAtomState *state = &rt->atomState;
344 :
345 19908 : if (!state->atoms.initialized()) {
346 : /*
347 : * We are called with uninitialized state when JS_NewRuntime fails and
348 : * calls JS_DestroyRuntime on a partially initialized runtime.
349 : */
350 0 : return;
351 : }
352 :
353 3678177 : for (AtomSet::Range r = state->atoms.all(); !r.empty(); r.popFront())
354 3658269 : r.front().asPtr()->finalize(rt);
355 : }
356 :
357 : bool
358 19910 : js_InitCommonAtoms(JSContext *cx)
359 : {
360 19910 : JSAtomState *state = &cx->runtime->atomState;
361 19910 : JSAtom **atoms = state->commonAtomsStart();
362 2687850 : for (size_t i = 0; i < ArrayLength(js_common_atom_names); i++, atoms++) {
363 : JSAtom *atom = js_Atomize(cx, js_common_atom_names[i], strlen(js_common_atom_names[i]),
364 2667940 : InternAtom);
365 2667940 : if (!atom)
366 0 : return false;
367 2667940 : *atoms = atom->asPropertyName();
368 : }
369 :
370 19910 : state->clearLazyAtoms();
371 19910 : cx->runtime->emptyString = state->emptyAtom;
372 19910 : return true;
373 : }
374 :
375 : void
376 19908 : js_FinishCommonAtoms(JSContext *cx)
377 : {
378 19908 : cx->runtime->emptyString = NULL;
379 19908 : cx->runtime->atomState.junkAtoms();
380 19908 : }
381 :
382 : void
383 54466 : js_TraceAtomState(JSTracer *trc)
384 : {
385 54466 : JSRuntime *rt = trc->runtime;
386 54466 : JSAtomState *state = &rt->atomState;
387 :
388 54466 : if (rt->gcKeepAtoms) {
389 5465720 : for (AtomSet::Range r = state->atoms.all(); !r.empty(); r.popFront()) {
390 5456668 : JSAtom *tmp = r.front().asPtr();
391 5456668 : MarkStringRoot(trc, &tmp, "locked_atom");
392 5456668 : JS_ASSERT(tmp == r.front().asPtr());
393 : }
394 : } else {
395 95187791 : for (AtomSet::Range r = state->atoms.all(); !r.empty(); r.popFront()) {
396 95142377 : AtomStateEntry entry = r.front();
397 95142377 : if (!entry.isTagged())
398 79872540 : continue;
399 :
400 15269837 : JSAtom *tmp = entry.asPtr();
401 15269837 : MarkStringRoot(trc, &tmp, "interned_atom");
402 15269837 : JS_ASSERT(tmp == entry.asPtr());
403 : }
404 : }
405 54466 : }
406 :
407 : void
408 51092 : js_SweepAtomState(JSRuntime *rt)
409 : {
410 51092 : JSAtomState *state = &rt->atomState;
411 :
412 98722146 : for (AtomSet::Enum e(state->atoms); !e.empty(); e.popFront()) {
413 98671054 : AtomStateEntry entry = e.front();
414 :
415 98671054 : if (entry.isTagged()) {
416 : /* Pinned or interned key cannot be finalized. */
417 16118769 : JS_ASSERT(!IsAboutToBeFinalized(entry.asPtr()));
418 16118769 : continue;
419 : }
420 :
421 82552285 : if (IsAboutToBeFinalized(entry.asPtr()))
422 15377535 : e.removeFront();
423 : }
424 51092 : }
425 :
426 : bool
427 4237985 : AtomIsInterned(JSContext *cx, JSAtom *atom)
428 : {
429 : /* We treat static strings as interned because they're never collected. */
430 4237985 : if (StaticStrings::isStatic(atom))
431 6752 : return true;
432 :
433 4231233 : AtomSet::Ptr p = cx->runtime->atomState.atoms.lookup(atom);
434 4231233 : if (!p)
435 0 : return false;
436 :
437 4231233 : return p->isTagged();
438 : }
439 :
440 : enum OwnCharsBehavior
441 : {
442 : CopyChars, /* in other words, do not take ownership */
443 : TakeCharOwnership
444 : };
445 :
446 : /*
447 : * Callers passing OwnChars have freshly allocated *pchars and thus this
448 : * memory can be used as a new JSAtom's buffer without copying. When this flag
449 : * is set, the contract is that callers will free *pchars iff *pchars == NULL.
450 : */
451 : JS_ALWAYS_INLINE
452 : static JSAtom *
453 77119232 : AtomizeInline(JSContext *cx, const jschar **pchars, size_t length,
454 : InternBehavior ib, OwnCharsBehavior ocb = CopyChars)
455 : {
456 77119232 : const jschar *chars = *pchars;
457 :
458 77119232 : if (JSAtom *s = cx->runtime->staticStrings.lookup(chars, length))
459 4646743 : return s;
460 :
461 72472489 : AtomSet &atoms = cx->runtime->atomState.atoms;
462 72472489 : AtomSet::AddPtr p = atoms.lookupForAdd(AtomHasher::Lookup(chars, length));
463 :
464 72472489 : if (p) {
465 53435395 : JSAtom *atom = p->asPtr();
466 53435395 : p->setTagged(bool(ib));
467 53435395 : return atom;
468 : }
469 :
470 38074188 : SwitchToCompartment sc(cx, cx->runtime->atomsCompartment);
471 :
472 : JSFixedString *key;
473 :
474 19037094 : if (ocb == TakeCharOwnership) {
475 1273643 : key = js_NewString(cx, const_cast<jschar *>(chars), length);
476 1273643 : if (!key)
477 0 : return NULL;
478 1273643 : *pchars = NULL; /* Called should not free *pchars. */
479 : } else {
480 17763451 : JS_ASSERT(ocb == CopyChars);
481 17763451 : key = js_NewStringCopyN(cx, chars, length);
482 17763451 : if (!key)
483 0 : return NULL;
484 : }
485 :
486 : /*
487 : * We have to relookup the key as the last ditch GC invoked from the
488 : * string allocation or OOM handling unlocks the atomsCompartment.
489 : *
490 : * N.B. this avoids recomputing the hash but still has a potential
491 : * (# collisions * # chars) comparison cost in the case of a hash
492 : * collision!
493 : */
494 19037094 : AtomHasher::Lookup lookup(chars, length);
495 19037094 : if (!atoms.relookupOrAdd(p, lookup, AtomStateEntry((JSAtom *) key, bool(ib)))) {
496 0 : JS_ReportOutOfMemory(cx); /* SystemAllocPolicy does not report */
497 0 : return NULL;
498 : }
499 :
500 19037094 : return key->morphAtomizedStringIntoAtom();
501 : }
502 :
503 : static JSAtom *
504 38723396 : Atomize(JSContext *cx, const jschar **pchars, size_t length,
505 : InternBehavior ib, OwnCharsBehavior ocb = CopyChars)
506 : {
507 38723396 : return AtomizeInline(cx, pchars, length, ib, ocb);
508 : }
509 :
510 : JSAtom *
511 5315630 : js_AtomizeString(JSContext *cx, JSString *str, InternBehavior ib)
512 : {
513 5315630 : if (str->isAtom()) {
514 1267657 : JSAtom &atom = str->asAtom();
515 : /* N.B. static atoms are effectively always interned. */
516 1267657 : if (ib != InternAtom || js::StaticStrings::isStatic(&atom))
517 1267656 : return &atom;
518 :
519 1 : AtomSet &atoms = cx->runtime->atomState.atoms;
520 1 : AtomSet::Ptr p = atoms.lookup(AtomHasher::Lookup(&atom));
521 1 : JS_ASSERT(p); /* Non-static atom must exist in atom state set. */
522 1 : JS_ASSERT(p->asPtr() == &atom);
523 1 : JS_ASSERT(ib == InternAtom);
524 1 : p->setTagged(bool(ib));
525 1 : return &atom;
526 : }
527 :
528 4047973 : if (str->isAtom())
529 0 : return &str->asAtom();
530 :
531 4047973 : size_t length = str->length();
532 4047973 : const jschar *chars = str->getChars(cx);
533 4047973 : if (!chars)
534 0 : return NULL;
535 :
536 4047973 : JS_ASSERT(length <= JSString::MAX_LENGTH);
537 4047973 : return Atomize(cx, &chars, length, ib);
538 : }
539 :
540 : JSAtom *
541 34675423 : js_Atomize(JSContext *cx, const char *bytes, size_t length, InternBehavior ib, FlationCoding fc)
542 : {
543 69350846 : CHECK_REQUEST(cx);
544 :
545 34675423 : if (!JSString::validateLength(cx, length))
546 0 : return NULL;
547 :
548 : /*
549 : * Avoiding the malloc in InflateString on shorter strings saves us
550 : * over 20,000 malloc calls on mozilla browser startup. This compares to
551 : * only 131 calls where the string is longer than a 31 char (net) buffer.
552 : * The vast majority of atomized strings are already in the hashtable. So
553 : * js_AtomizeString rarely has to copy the temp string we make.
554 : */
555 : static const unsigned ATOMIZE_BUF_MAX = 32;
556 : jschar inflated[ATOMIZE_BUF_MAX];
557 34675423 : size_t inflatedLength = ATOMIZE_BUF_MAX - 1;
558 :
559 : const jschar *chars;
560 34675423 : OwnCharsBehavior ocb = CopyChars;
561 34675423 : if (length < ATOMIZE_BUF_MAX) {
562 33091883 : if (fc == CESU8Encoding)
563 0 : InflateUTF8StringToBuffer(cx, bytes, length, inflated, &inflatedLength, fc);
564 : else
565 33091883 : InflateStringToBuffer(cx, bytes, length, inflated, &inflatedLength);
566 33091883 : inflated[inflatedLength] = 0;
567 33091883 : chars = inflated;
568 : } else {
569 1583540 : inflatedLength = length;
570 1583540 : chars = InflateString(cx, bytes, &inflatedLength, fc);
571 1583540 : if (!chars)
572 0 : return NULL;
573 1583540 : ocb = TakeCharOwnership;
574 : }
575 :
576 34675423 : JSAtom *atom = Atomize(cx, &chars, inflatedLength, ib, ocb);
577 34675423 : if (ocb == TakeCharOwnership && chars)
578 309897 : cx->free_((void *)chars);
579 34675423 : return atom;
580 : }
581 :
582 : JSAtom *
583 38395836 : js_AtomizeChars(JSContext *cx, const jschar *chars, size_t length, InternBehavior ib)
584 : {
585 76791672 : CHECK_REQUEST(cx);
586 :
587 38395836 : if (!JSString::validateLength(cx, length))
588 0 : return NULL;
589 :
590 38395836 : return AtomizeInline(cx, &chars, length, ib);
591 : }
592 :
593 : JSAtom *
594 0 : js_GetExistingStringAtom(JSContext *cx, const jschar *chars, size_t length)
595 : {
596 0 : if (JSAtom *atom = cx->runtime->staticStrings.lookup(chars, length))
597 0 : return atom;
598 0 : if (AtomSet::Ptr p = cx->runtime->atomState.atoms.lookup(AtomHasher::Lookup(chars, length)))
599 0 : return p->asPtr();
600 0 : return NULL;
601 : }
602 :
603 : #ifdef DEBUG
604 : JS_FRIEND_API(void)
605 0 : js_DumpAtoms(JSContext *cx, FILE *fp)
606 : {
607 0 : JSAtomState *state = &cx->runtime->atomState;
608 :
609 0 : fprintf(fp, "atoms table contents:\n");
610 0 : unsigned number = 0;
611 0 : for (AtomSet::Range r = state->atoms.all(); !r.empty(); r.popFront()) {
612 0 : AtomStateEntry entry = r.front();
613 0 : fprintf(fp, "%3u ", number++);
614 0 : JSAtom *key = entry.asPtr();
615 0 : FileEscapedString(fp, key, '"');
616 0 : if (entry.isTagged())
617 0 : fputs(" interned", fp);
618 0 : putc('\n', fp);
619 : }
620 0 : putc('\n', fp);
621 0 : }
622 : #endif
623 :
624 : #if JS_BITS_PER_WORD == 32
625 : # define TEMP_SIZE_START_LOG2 5
626 : #else
627 : # define TEMP_SIZE_START_LOG2 6
628 : #endif
629 : #define TEMP_SIZE_LIMIT_LOG2 (TEMP_SIZE_START_LOG2 + NUM_TEMP_FREELISTS)
630 :
631 : #define TEMP_SIZE_START JS_BIT(TEMP_SIZE_START_LOG2)
632 : #define TEMP_SIZE_LIMIT JS_BIT(TEMP_SIZE_LIMIT_LOG2)
633 :
634 : JS_STATIC_ASSERT(TEMP_SIZE_START >= sizeof(JSHashTable));
635 :
636 : void
637 1109121 : js_InitAtomMap(JSContext *cx, AtomIndexMap *indices, JSAtom **atoms)
638 : {
639 1109121 : if (indices->isMap()) {
640 : typedef AtomIndexMap::WordMap WordMap;
641 73192 : const WordMap &wm = indices->asMap();
642 6927467 : for (WordMap::Range r = wm.all(); !r.empty(); r.popFront()) {
643 6854275 : JSAtom *atom = r.front().key;
644 6854275 : jsatomid index = r.front().value;
645 6854275 : JS_ASSERT(index < indices->count());
646 6854275 : atoms[index] = atom;
647 : }
648 : } else {
649 7008566 : for (const AtomIndexMap::InlineElem *it = indices->asInline(), *end = indices->inlineEnd();
650 : it != end; ++it) {
651 5972637 : JSAtom *atom = it->key;
652 5972637 : if (!atom)
653 0 : continue;
654 5972637 : JS_ASSERT(it->value < indices->count());
655 5972637 : atoms[it->value] = atom;
656 : }
657 : }
658 1109121 : }
659 :
660 : namespace js {
661 :
662 : bool
663 233 : IndexToIdSlow(JSContext *cx, uint32_t index, jsid *idp)
664 : {
665 233 : JS_ASSERT(index > JSID_INT_MAX);
666 :
667 : jschar buf[UINT32_CHAR_BUFFER_LENGTH];
668 233 : RangedPtr<jschar> end(ArrayEnd(buf), buf, ArrayEnd(buf));
669 233 : RangedPtr<jschar> start = BackfillIndexInCharBuffer(index, end);
670 :
671 233 : JSAtom *atom = js_AtomizeChars(cx, start.get(), end - start);
672 233 : if (!atom)
673 0 : return false;
674 :
675 233 : *idp = ATOM_TO_JSID(atom);
676 233 : JS_ASSERT(js_CheckForStringIndex(*idp) == *idp);
677 233 : return true;
678 : }
679 :
680 : } /* namespace js */
681 :
682 : /* JSBOXEDWORD_INT_MAX as a string */
683 : #define JSBOXEDWORD_INT_MAX_STRING "1073741823"
684 :
685 : /*
686 : * Convert string indexes that convert to int jsvals as ints to save memory.
687 : * Care must be taken to use this macro every time a property name is used, or
688 : * else double-sets, incorrect property cache misses, or other mistakes could
689 : * occur.
690 : */
691 : jsid
692 399935245 : js_CheckForStringIndex(jsid id)
693 : {
694 399935245 : if (!JSID_IS_ATOM(id))
695 118001644 : return id;
696 :
697 281933601 : JSAtom *atom = JSID_TO_ATOM(id);
698 281933601 : const jschar *s = atom->chars();
699 281933602 : jschar ch = *s;
700 :
701 281933602 : JSBool negative = (ch == '-');
702 281933602 : if (negative)
703 28352 : ch = *++s;
704 :
705 281933602 : if (!JS7_ISDEC(ch))
706 279875898 : return id;
707 :
708 2057704 : size_t n = atom->length() - negative;
709 2057704 : if (n > sizeof(JSBOXEDWORD_INT_MAX_STRING) - 1)
710 3471 : return id;
711 :
712 2054233 : const jschar *cp = s;
713 2054233 : const jschar *end = s + n;
714 :
715 2054233 : uint32_t index = JS7_UNDEC(*cp++);
716 2054233 : uint32_t oldIndex = 0;
717 2054233 : uint32_t c = 0;
718 :
719 2054233 : if (index != 0) {
720 4320279 : while (JS7_ISDEC(*cp)) {
721 513489 : oldIndex = index;
722 513489 : c = JS7_UNDEC(*cp);
723 513489 : index = 10 * index + c;
724 513489 : cp++;
725 : }
726 : }
727 :
728 : /*
729 : * Non-integer indexes can't be represented as integers. Also, distinguish
730 : * index "-0" from "0", because JSBOXEDWORD_INT cannot.
731 : */
732 2054233 : if (cp != end || (negative && index == 0))
733 887041 : return id;
734 :
735 1167192 : if (negative) {
736 3321 : if (oldIndex < -(JSID_INT_MIN / 10) ||
737 : (oldIndex == -(JSID_INT_MIN / 10) && c <= (-JSID_INT_MIN % 10)))
738 : {
739 2574 : id = INT_TO_JSID(-int32_t(index));
740 : }
741 : } else {
742 1163871 : if (oldIndex < JSID_INT_MAX / 10 ||
743 : (oldIndex == JSID_INT_MAX / 10 && c <= (JSID_INT_MAX % 10)))
744 : {
745 1162936 : id = INT_TO_JSID(int32_t(index));
746 : }
747 : }
748 :
749 1167192 : return id;
750 : }
751 :
752 : #if JS_HAS_XML_SUPPORT
753 : bool
754 6 : js_InternNonIntElementIdSlow(JSContext *cx, JSObject *obj, const Value &idval,
755 : jsid *idp)
756 : {
757 6 : JS_ASSERT(idval.isObject());
758 6 : if (obj->isXML()) {
759 0 : *idp = OBJECT_TO_JSID(&idval.toObject());
760 0 : return true;
761 : }
762 :
763 6 : if (js_GetLocalNameFromFunctionQName(&idval.toObject(), idp, cx))
764 0 : return true;
765 :
766 6 : return js_ValueToStringId(cx, idval, idp);
767 : }
768 :
769 : bool
770 3479 : js_InternNonIntElementIdSlow(JSContext *cx, JSObject *obj, const Value &idval,
771 : jsid *idp, Value *vp)
772 : {
773 3479 : JS_ASSERT(idval.isObject());
774 3479 : if (obj->isXML()) {
775 0 : JSObject &idobj = idval.toObject();
776 0 : *idp = OBJECT_TO_JSID(&idobj);
777 0 : vp->setObject(idobj);
778 0 : return true;
779 : }
780 :
781 3479 : if (js_GetLocalNameFromFunctionQName(&idval.toObject(), idp, cx)) {
782 9 : *vp = IdToValue(*idp);
783 9 : return true;
784 : }
785 :
786 3470 : if (js_ValueToStringId(cx, idval, idp)) {
787 3470 : vp->setString(JSID_TO_STRING(*idp));
788 3470 : return true;
789 : }
790 0 : return false;
791 : }
792 : #endif
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