1 /*
2 +----------------------------------------------------------------------+
3 | Zend Engine |
4 +----------------------------------------------------------------------+
5 | Copyright (c) Zend Technologies Ltd. (http://www.zend.com) |
6 +----------------------------------------------------------------------+
7 | This source file is subject to version 2.00 of the Zend license, |
8 | that is bundled with this package in the file LICENSE, and is |
9 | available through the world-wide-web at the following url: |
10 | http://www.zend.com/license/2_00.txt. |
11 | If you did not receive a copy of the Zend license and are unable to |
12 | obtain it through the world-wide-web, please send a note to |
13 | license@zend.com so we can mail you a copy immediately. |
14 +----------------------------------------------------------------------+
15 | Authors: Andi Gutmans <andi@php.net> |
16 | Zeev Suraski <zeev@php.net> |
17 | Dmitry Stogov <dmitry@php.net> |
18 +----------------------------------------------------------------------+
19 */
20
21 #include "zend.h"
22 #include "zend_globals.h"
23 #include "zend_variables.h"
24 #include "zend_API.h"
25 #include "zend_objects.h"
26 #include "zend_objects_API.h"
27 #include "zend_object_handlers.h"
28 #include "zend_interfaces.h"
29 #include "zend_exceptions.h"
30 #include "zend_closures.h"
31 #include "zend_compile.h"
32 #include "zend_hash.h"
33
34 #define DEBUG_OBJECT_HANDLERS 0
35
36 #define ZEND_WRONG_PROPERTY_OFFSET 0
37
38 /* guard flags */
39 #define IN_GET (1<<0)
40 #define IN_SET (1<<1)
41 #define IN_UNSET (1<<2)
42 #define IN_ISSET (1<<3)
43
44 /*
45 __X accessors explanation:
46
47 if we have __get and property that is not part of the properties array is
48 requested, we call __get handler. If it fails, we return uninitialized.
49
50 if we have __set and property that is not part of the properties array is
51 set, we call __set handler. If it fails, we do not change the array.
52
53 for both handlers above, when we are inside __get/__set, no further calls for
54 __get/__set for this property of this object will be made, to prevent endless
55 recursion and enable accessors to change properties array.
56
57 if we have __call and method which is not part of the class function table is
58 called, we cal __call handler.
59 */
60
rebuild_object_properties(zend_object *zobj)61 ZEND_API void rebuild_object_properties(zend_object *zobj) /* {{{ */
62 {
63 if (!zobj->properties) {
64 zend_property_info *prop_info;
65 zend_class_entry *ce = zobj->ce;
66 uint32_t flags = 0;
67
68 zobj->properties = zend_new_array(ce->default_properties_count);
69 if (ce->default_properties_count) {
70 zend_hash_real_init_mixed(zobj->properties);
71 ZEND_HASH_FOREACH_PTR(&ce->properties_info, prop_info) {
72 if (!(prop_info->flags & ZEND_ACC_STATIC)) {
73 flags |= prop_info->flags;
74
75 if (UNEXPECTED(Z_TYPE_P(OBJ_PROP(zobj, prop_info->offset)) == IS_UNDEF)) {
76 HT_FLAGS(zobj->properties) |= HASH_FLAG_HAS_EMPTY_IND;
77 }
78
79 _zend_hash_append_ind(zobj->properties, prop_info->name,
80 OBJ_PROP(zobj, prop_info->offset));
81 }
82 } ZEND_HASH_FOREACH_END();
83 if (flags & ZEND_ACC_CHANGED) {
84 while (ce->parent && ce->parent->default_properties_count) {
85 ce = ce->parent;
86 ZEND_HASH_FOREACH_PTR(&ce->properties_info, prop_info) {
87 if (prop_info->ce == ce &&
88 !(prop_info->flags & ZEND_ACC_STATIC) &&
89 (prop_info->flags & ZEND_ACC_PRIVATE)) {
90 zval zv;
91
92 if (UNEXPECTED(Z_TYPE_P(OBJ_PROP(zobj, prop_info->offset)) == IS_UNDEF)) {
93 HT_FLAGS(zobj->properties) |= HASH_FLAG_HAS_EMPTY_IND;
94 }
95
96 ZVAL_INDIRECT(&zv, OBJ_PROP(zobj, prop_info->offset));
97 zend_hash_add(zobj->properties, prop_info->name, &zv);
98 }
99 } ZEND_HASH_FOREACH_END();
100 }
101 }
102 }
103 }
104 }
105 /* }}} */
106
zend_std_get_properties(zval *object)107 ZEND_API HashTable *zend_std_get_properties(zval *object) /* {{{ */
108 {
109 zend_object *zobj;
110 zobj = Z_OBJ_P(object);
111 if (!zobj->properties) {
112 rebuild_object_properties(zobj);
113 }
114 return zobj->properties;
115 }
116 /* }}} */
117
zend_std_get_gc(zval *object, zval **table, int *n)118 ZEND_API HashTable *zend_std_get_gc(zval *object, zval **table, int *n) /* {{{ */
119 {
120 if (Z_OBJ_HANDLER_P(object, get_properties) != zend_std_get_properties) {
121 *table = NULL;
122 *n = 0;
123 return Z_OBJ_HANDLER_P(object, get_properties)(object);
124 } else {
125 zend_object *zobj = Z_OBJ_P(object);
126
127 if (zobj->properties) {
128 *table = NULL;
129 *n = 0;
130 if (UNEXPECTED(GC_REFCOUNT(zobj->properties) > 1)
131 && EXPECTED(!(GC_FLAGS(zobj->properties) & IS_ARRAY_IMMUTABLE))) {
132 GC_DELREF(zobj->properties);
133 zobj->properties = zend_array_dup(zobj->properties);
134 }
135 return zobj->properties;
136 } else {
137 *table = zobj->properties_table;
138 *n = zobj->ce->default_properties_count;
139 return NULL;
140 }
141 }
142 }
143 /* }}} */
144
zend_std_get_debug_info(zval *object, int *is_temp)145 ZEND_API HashTable *zend_std_get_debug_info(zval *object, int *is_temp) /* {{{ */
146 {
147 zend_class_entry *ce = Z_OBJCE_P(object);
148 zval retval;
149 HashTable *ht;
150
151 if (!ce->__debugInfo) {
152 *is_temp = 0;
153 return Z_OBJ_HANDLER_P(object, get_properties)(object);
154 }
155
156 zend_call_method_with_0_params(object, ce, &ce->__debugInfo, ZEND_DEBUGINFO_FUNC_NAME, &retval);
157 if (Z_TYPE(retval) == IS_ARRAY) {
158 if (!Z_REFCOUNTED(retval)) {
159 *is_temp = 1;
160 return zend_array_dup(Z_ARRVAL(retval));
161 } else if (Z_REFCOUNT(retval) <= 1) {
162 *is_temp = 1;
163 ht = Z_ARR(retval);
164 return ht;
165 } else {
166 *is_temp = 0;
167 zval_ptr_dtor(&retval);
168 return Z_ARRVAL(retval);
169 }
170 } else if (Z_TYPE(retval) == IS_NULL) {
171 *is_temp = 1;
172 ht = zend_new_array(0);
173 return ht;
174 }
175
176 zend_error_noreturn(E_ERROR, ZEND_DEBUGINFO_FUNC_NAME "() must return an array");
177
178 return NULL; /* Compilers are dumb and don't understand that noreturn means that the function does NOT need a return value... */
179 }
180 /* }}} */
181
zend_std_call_getter(zend_object *zobj, zend_string *prop_name, zval *retval)182 static void zend_std_call_getter(zend_object *zobj, zend_string *prop_name, zval *retval) /* {{{ */
183 {
184 zend_class_entry *ce = zobj->ce;
185 zend_class_entry *orig_fake_scope = EG(fake_scope);
186 zend_fcall_info fci;
187 zend_fcall_info_cache fcic;
188 zval member;
189
190 EG(fake_scope) = NULL;
191
192 /* __get handler is called with one argument:
193 property name
194
195 it should return whether the call was successful or not
196 */
197
198 ZVAL_STR(&member, prop_name);
199
200 fci.size = sizeof(fci);
201 fci.object = zobj;
202 fci.retval = retval;
203 fci.param_count = 1;
204 fci.params = &member;
205 fci.no_separation = 1;
206 ZVAL_UNDEF(&fci.function_name); /* Unused */
207
208 fcic.function_handler = ce->__get;
209 fcic.called_scope = ce;
210 fcic.object = zobj;
211
212 zend_call_function(&fci, &fcic);
213
214 EG(fake_scope) = orig_fake_scope;
215 }
216 /* }}} */
217
zend_std_call_setter(zend_object *zobj, zend_string *prop_name, zval *value)218 static void zend_std_call_setter(zend_object *zobj, zend_string *prop_name, zval *value) /* {{{ */
219 {
220 zend_class_entry *ce = zobj->ce;
221 zend_class_entry *orig_fake_scope = EG(fake_scope);
222 zend_fcall_info fci;
223 zend_fcall_info_cache fcic;
224 zval args[2], ret;
225
226 EG(fake_scope) = NULL;
227
228 /* __set handler is called with two arguments:
229 property name
230 value to be set
231 */
232
233 ZVAL_STR(&args[0], prop_name);
234 ZVAL_COPY_VALUE(&args[1], value);
235 ZVAL_UNDEF(&ret);
236
237 fci.size = sizeof(fci);
238 fci.object = zobj;
239 fci.retval = &ret;
240 fci.param_count = 2;
241 fci.params = args;
242 fci.no_separation = 1;
243 ZVAL_UNDEF(&fci.function_name); /* Unused */
244
245 fcic.function_handler = ce->__set;
246 fcic.called_scope = ce;
247 fcic.object = zobj;
248
249 zend_call_function(&fci, &fcic);
250 zval_ptr_dtor(&ret);
251
252 EG(fake_scope) = orig_fake_scope;
253 }
254 /* }}} */
255
zend_std_call_unsetter(zend_object *zobj, zend_string *prop_name)256 static void zend_std_call_unsetter(zend_object *zobj, zend_string *prop_name) /* {{{ */
257 {
258 zend_class_entry *ce = zobj->ce;
259 zend_class_entry *orig_fake_scope = EG(fake_scope);
260 zend_fcall_info fci;
261 zend_fcall_info_cache fcic;
262 zval ret, member;
263
264 EG(fake_scope) = NULL;
265
266 /* __unset handler is called with one argument:
267 property name
268 */
269
270 ZVAL_STR(&member, prop_name);
271 ZVAL_UNDEF(&ret);
272
273 fci.size = sizeof(fci);
274 fci.object = zobj;
275 fci.retval = &ret;
276 fci.param_count = 1;
277 fci.params = &member;
278 fci.no_separation = 1;
279 ZVAL_UNDEF(&fci.function_name); /* Unused */
280
281 fcic.function_handler = ce->__unset;
282 fcic.called_scope = ce;
283 fcic.object = zobj;
284
285 zend_call_function(&fci, &fcic);
286 zval_ptr_dtor(&ret);
287
288 EG(fake_scope) = orig_fake_scope;
289 }
290 /* }}} */
291
zend_std_call_issetter(zend_object *zobj, zend_string *prop_name, zval *retval)292 static void zend_std_call_issetter(zend_object *zobj, zend_string *prop_name, zval *retval) /* {{{ */
293 {
294 zend_class_entry *ce = zobj->ce;
295 zend_class_entry *orig_fake_scope = EG(fake_scope);
296 zend_fcall_info fci;
297 zend_fcall_info_cache fcic;
298 zval member;
299
300 EG(fake_scope) = NULL;
301
302 /* __isset handler is called with one argument:
303 property name
304
305 it should return whether the property is set or not
306 */
307
308 ZVAL_STR(&member, prop_name);
309
310 fci.size = sizeof(fci);
311 fci.object = zobj;
312 fci.retval = retval;
313 fci.param_count = 1;
314 fci.params = &member;
315 fci.no_separation = 1;
316 ZVAL_UNDEF(&fci.function_name); /* Unused */
317
318 fcic.function_handler = ce->__isset;
319 fcic.called_scope = ce;
320 fcic.object = zobj;
321
322 zend_call_function(&fci, &fcic);
323
324 EG(fake_scope) = orig_fake_scope;
325 }
326 /* }}} */
327
328
is_derived_class(zend_class_entry *child_class, zend_class_entry *parent_class)329 static zend_always_inline zend_bool is_derived_class(zend_class_entry *child_class, zend_class_entry *parent_class) /* {{{ */
330 {
331 child_class = child_class->parent;
332 while (child_class) {
333 if (child_class == parent_class) {
334 return 1;
335 }
336 child_class = child_class->parent;
337 }
338
339 return 0;
340 }
341 /* }}} */
342
is_protected_compatible_scope(zend_class_entry *ce, zend_class_entry *scope)343 static zend_never_inline int is_protected_compatible_scope(zend_class_entry *ce, zend_class_entry *scope) /* {{{ */
344 {
345 return scope &&
346 (is_derived_class(ce, scope) || is_derived_class(scope, ce));
347 }
348 /* }}} */
349
zend_get_parent_private_property(zend_class_entry *scope, zend_class_entry *ce, zend_string *member)350 static zend_never_inline zend_property_info *zend_get_parent_private_property(zend_class_entry *scope, zend_class_entry *ce, zend_string *member) /* {{{ */
351 {
352 zval *zv;
353 zend_property_info *prop_info;
354
355 if (scope != ce && scope && is_derived_class(ce, scope)) {
356 zv = zend_hash_find(&scope->properties_info, member);
357 if (zv != NULL) {
358 prop_info = (zend_property_info*)Z_PTR_P(zv);
359 if ((prop_info->flags & ZEND_ACC_PRIVATE)
360 && prop_info->ce == scope) {
361 return prop_info;
362 }
363 }
364 }
365 return NULL;
366 }
367 /* }}} */
368
zend_bad_property_access(zend_property_info *property_info, zend_class_entry *ce, zend_string *member)369 static ZEND_COLD zend_never_inline void zend_bad_property_access(zend_property_info *property_info, zend_class_entry *ce, zend_string *member) /* {{{ */
370 {
371 zend_throw_error(NULL, "Cannot access %s property %s::$%s", zend_visibility_string(property_info->flags), ZSTR_VAL(ce->name), ZSTR_VAL(member));
372 }
373 /* }}} */
374
zend_bad_property_name(void)375 static ZEND_COLD zend_never_inline void zend_bad_property_name(void) /* {{{ */
376 {
377 zend_throw_error(NULL, "Cannot access property started with '\\0'");
378 }
379 /* }}} */
380
zend_get_property_offset(zend_class_entry *ce, zend_string *member, int silent, void **cache_slot, zend_property_info **info_ptr)381 static zend_always_inline uintptr_t zend_get_property_offset(zend_class_entry *ce, zend_string *member, int silent, void **cache_slot, zend_property_info **info_ptr) /* {{{ */
382 {
383 zval *zv;
384 zend_property_info *property_info;
385 uint32_t flags;
386 zend_class_entry *scope;
387 uintptr_t offset;
388
389 if (cache_slot && EXPECTED(ce == CACHED_PTR_EX(cache_slot))) {
390 *info_ptr = CACHED_PTR_EX(cache_slot + 2);
391 return (uintptr_t)CACHED_PTR_EX(cache_slot + 1);
392 }
393
394 if (UNEXPECTED(zend_hash_num_elements(&ce->properties_info) == 0)
395 || UNEXPECTED((zv = zend_hash_find(&ce->properties_info, member)) == NULL)) {
396 if (UNEXPECTED(ZSTR_VAL(member)[0] == '\0') && ZSTR_LEN(member) != 0) {
397 if (!silent) {
398 zend_bad_property_name();
399 }
400 return ZEND_WRONG_PROPERTY_OFFSET;
401 }
402 dynamic:
403 if (cache_slot) {
404 CACHE_POLYMORPHIC_PTR_EX(cache_slot, ce, (void*)ZEND_DYNAMIC_PROPERTY_OFFSET);
405 CACHE_PTR_EX(cache_slot + 2, NULL);
406 }
407 return ZEND_DYNAMIC_PROPERTY_OFFSET;
408 }
409
410 property_info = (zend_property_info*)Z_PTR_P(zv);
411 flags = property_info->flags;
412
413 if (flags & (ZEND_ACC_CHANGED|ZEND_ACC_PRIVATE|ZEND_ACC_PROTECTED)) {
414 if (UNEXPECTED(EG(fake_scope))) {
415 scope = EG(fake_scope);
416 } else {
417 scope = zend_get_executed_scope();
418 }
419
420 if (property_info->ce != scope) {
421 if (flags & ZEND_ACC_CHANGED) {
422 zend_property_info *p = zend_get_parent_private_property(scope, ce, member);
423
424 /* If there is a public/protected instance property on ce, don't try to use a
425 * private static property on scope. If both are static, prefer the static
426 * property on scope. This will throw a static property notice, rather than
427 * a visibility error. */
428 if (p && (!(p->flags & ZEND_ACC_STATIC) || (flags & ZEND_ACC_STATIC))) {
429 property_info = p;
430 flags = property_info->flags;
431 goto found;
432 } else if (flags & ZEND_ACC_PUBLIC) {
433 goto found;
434 }
435 }
436 if (flags & ZEND_ACC_PRIVATE) {
437 if (property_info->ce != ce) {
438 goto dynamic;
439 } else {
440 wrong:
441 /* Information was available, but we were denied access. Error out. */
442 if (!silent) {
443 zend_bad_property_access(property_info, ce, member);
444 }
445 return ZEND_WRONG_PROPERTY_OFFSET;
446 }
447 } else {
448 ZEND_ASSERT(flags & ZEND_ACC_PROTECTED);
449 if (UNEXPECTED(!is_protected_compatible_scope(property_info->ce, scope))) {
450 goto wrong;
451 }
452 }
453 }
454 }
455
456 found:
457 if (UNEXPECTED(flags & ZEND_ACC_STATIC)) {
458 if (!silent) {
459 zend_error(E_NOTICE, "Accessing static property %s::$%s as non static", ZSTR_VAL(ce->name), ZSTR_VAL(member));
460 }
461 return ZEND_DYNAMIC_PROPERTY_OFFSET;
462 }
463
464 offset = property_info->offset;
465 if (EXPECTED(!property_info->type)) {
466 property_info = NULL;
467 } else {
468 *info_ptr = property_info;
469 }
470 if (cache_slot) {
471 CACHE_POLYMORPHIC_PTR_EX(cache_slot, ce, (void*)(uintptr_t)offset);
472 CACHE_PTR_EX(cache_slot + 2, property_info);
473 }
474 return offset;
475 }
476 /* }}} */
477
zend_wrong_offset(zend_class_entry *ce, zend_string *member)478 static ZEND_COLD void zend_wrong_offset(zend_class_entry *ce, zend_string *member) /* {{{ */
479 {
480 zend_property_info *dummy;
481
482 /* Trigger the correct error */
483 zend_get_property_offset(ce, member, 0, NULL, &dummy);
484 }
485 /* }}} */
486
zend_get_property_info(zend_class_entry *ce, zend_string *member, int silent)487 ZEND_API zend_property_info *zend_get_property_info(zend_class_entry *ce, zend_string *member, int silent) /* {{{ */
488 {
489 zval *zv;
490 zend_property_info *property_info;
491 uint32_t flags;
492 zend_class_entry *scope;
493
494 if (UNEXPECTED(zend_hash_num_elements(&ce->properties_info) == 0)
495 || EXPECTED((zv = zend_hash_find(&ce->properties_info, member)) == NULL)) {
496 if (UNEXPECTED(ZSTR_VAL(member)[0] == '\0') && ZSTR_LEN(member) != 0) {
497 if (!silent) {
498 zend_bad_property_name();
499 }
500 return ZEND_WRONG_PROPERTY_INFO;
501 }
502 dynamic:
503 return NULL;
504 }
505
506 property_info = (zend_property_info*)Z_PTR_P(zv);
507 flags = property_info->flags;
508
509 if (flags & (ZEND_ACC_CHANGED|ZEND_ACC_PRIVATE|ZEND_ACC_PROTECTED)) {
510 if (UNEXPECTED(EG(fake_scope))) {
511 scope = EG(fake_scope);
512 } else {
513 scope = zend_get_executed_scope();
514 }
515 if (property_info->ce != scope) {
516 if (flags & ZEND_ACC_CHANGED) {
517 zend_property_info *p = zend_get_parent_private_property(scope, ce, member);
518
519 if (p) {
520 property_info = p;
521 flags = property_info->flags;
522 goto found;
523 } else if (flags & ZEND_ACC_PUBLIC) {
524 goto found;
525 }
526 }
527 if (flags & ZEND_ACC_PRIVATE) {
528 if (property_info->ce != ce) {
529 goto dynamic;
530 } else {
531 wrong:
532 /* Information was available, but we were denied access. Error out. */
533 if (!silent) {
534 zend_bad_property_access(property_info, ce, member);
535 }
536 return ZEND_WRONG_PROPERTY_INFO;
537 }
538 } else {
539 ZEND_ASSERT(flags & ZEND_ACC_PROTECTED);
540 if (UNEXPECTED(!is_protected_compatible_scope(property_info->ce, scope))) {
541 goto wrong;
542 }
543 }
544 }
545 }
546
547 found:
548 if (UNEXPECTED(flags & ZEND_ACC_STATIC)) {
549 if (!silent) {
550 zend_error(E_NOTICE, "Accessing static property %s::$%s as non static", ZSTR_VAL(ce->name), ZSTR_VAL(member));
551 }
552 }
553 return property_info;
554 }
555 /* }}} */
556
zend_check_property_access(zend_object *zobj, zend_string *prop_info_name, zend_bool is_dynamic)557 ZEND_API int zend_check_property_access(zend_object *zobj, zend_string *prop_info_name, zend_bool is_dynamic) /* {{{ */
558 {
559 zend_property_info *property_info;
560 const char *class_name = NULL;
561 const char *prop_name;
562 zend_string *member;
563 size_t prop_name_len;
564
565 if (ZSTR_VAL(prop_info_name)[0] == 0) {
566 if (is_dynamic) {
567 return SUCCESS;
568 }
569
570 zend_unmangle_property_name_ex(prop_info_name, &class_name, &prop_name, &prop_name_len);
571 member = zend_string_init(prop_name, prop_name_len, 0);
572 property_info = zend_get_property_info(zobj->ce, member, 1);
573 zend_string_release_ex(member, 0);
574 if (property_info == NULL || property_info == ZEND_WRONG_PROPERTY_INFO) {
575 return FAILURE;
576 }
577
578 if (class_name[0] != '*') {
579 if (!(property_info->flags & ZEND_ACC_PRIVATE)) {
580 /* we we're looking for a private prop but found a non private one of the same name */
581 return FAILURE;
582 } else if (strcmp(ZSTR_VAL(prop_info_name)+1, ZSTR_VAL(property_info->name)+1)) {
583 /* we we're looking for a private prop but found a private one of the same name but another class */
584 return FAILURE;
585 }
586 } else {
587 ZEND_ASSERT(property_info->flags & ZEND_ACC_PROTECTED);
588 }
589 return SUCCESS;
590 } else {
591 property_info = zend_get_property_info(zobj->ce, prop_info_name, 1);
592 if (property_info == NULL) {
593 ZEND_ASSERT(is_dynamic);
594 return SUCCESS;
595 } else if (property_info == ZEND_WRONG_PROPERTY_INFO) {
596 return FAILURE;
597 }
598 return (property_info->flags & ZEND_ACC_PUBLIC) ? SUCCESS : FAILURE;
599 }
600 }
601 /* }}} */
602
zend_property_guard_dtor(zval *el)603 static void zend_property_guard_dtor(zval *el) /* {{{ */ {
604 uint32_t *ptr = (uint32_t*)Z_PTR_P(el);
605 if (EXPECTED(!(((zend_uintptr_t)ptr) & 1))) {
606 efree_size(ptr, sizeof(uint32_t));
607 }
608 }
609 /* }}} */
610
zend_get_property_guard(zend_object *zobj, zend_string *member)611 ZEND_API uint32_t *zend_get_property_guard(zend_object *zobj, zend_string *member) /* {{{ */
612 {
613 HashTable *guards;
614 zval *zv;
615 uint32_t *ptr;
616
617 ZEND_ASSERT(zobj->ce->ce_flags & ZEND_ACC_USE_GUARDS);
618 zv = zobj->properties_table + zobj->ce->default_properties_count;
619 if (EXPECTED(Z_TYPE_P(zv) == IS_STRING)) {
620 zend_string *str = Z_STR_P(zv);
621 if (EXPECTED(str == member) ||
622 /* "str" always has a pre-calculated hash value here */
623 (EXPECTED(ZSTR_H(str) == zend_string_hash_val(member)) &&
624 EXPECTED(zend_string_equal_content(str, member)))) {
625 return &Z_PROPERTY_GUARD_P(zv);
626 } else if (EXPECTED(Z_PROPERTY_GUARD_P(zv) == 0)) {
627 zval_ptr_dtor_str(zv);
628 ZVAL_STR_COPY(zv, member);
629 return &Z_PROPERTY_GUARD_P(zv);
630 } else {
631 ALLOC_HASHTABLE(guards);
632 zend_hash_init(guards, 8, NULL, zend_property_guard_dtor, 0);
633 /* mark pointer as "special" using low bit */
634 zend_hash_add_new_ptr(guards, str,
635 (void*)(((zend_uintptr_t)&Z_PROPERTY_GUARD_P(zv)) | 1));
636 zval_ptr_dtor_str(zv);
637 ZVAL_ARR(zv, guards);
638 }
639 } else if (EXPECTED(Z_TYPE_P(zv) == IS_ARRAY)) {
640 guards = Z_ARRVAL_P(zv);
641 ZEND_ASSERT(guards != NULL);
642 zv = zend_hash_find(guards, member);
643 if (zv != NULL) {
644 return (uint32_t*)(((zend_uintptr_t)Z_PTR_P(zv)) & ~1);
645 }
646 } else {
647 ZEND_ASSERT(Z_TYPE_P(zv) == IS_UNDEF);
648 ZVAL_STR_COPY(zv, member);
649 Z_PROPERTY_GUARD_P(zv) = 0;
650 return &Z_PROPERTY_GUARD_P(zv);
651 }
652 /* we have to allocate uint32_t separately because ht->arData may be reallocated */
653 ptr = (uint32_t*)emalloc(sizeof(uint32_t));
654 *ptr = 0;
655 return (uint32_t*)zend_hash_add_new_ptr(guards, member, ptr);
656 }
657 /* }}} */
658
zend_std_read_property(zval *object, zval *member, int type, void **cache_slot, zval *rv)659 ZEND_API zval *zend_std_read_property(zval *object, zval *member, int type, void **cache_slot, zval *rv) /* {{{ */
660 {
661 zend_object *zobj;
662 zend_string *name, *tmp_name;
663 zval *retval;
664 uintptr_t property_offset;
665 zend_property_info *prop_info = NULL;
666 uint32_t *guard = NULL;
667
668 zobj = Z_OBJ_P(object);
669 name = zval_try_get_tmp_string(member, &tmp_name);
670 if (UNEXPECTED(!name)) {
671 return &EG(uninitialized_zval);
672 }
673
674 #if DEBUG_OBJECT_HANDLERS
675 fprintf(stderr, "Read object #%d property: %s\n", Z_OBJ_HANDLE_P(object), ZSTR_VAL(name));
676 #endif
677
678 /* make zend_get_property_info silent if we have getter - we may want to use it */
679 property_offset = zend_get_property_offset(zobj->ce, name, (type == BP_VAR_IS) || (zobj->ce->__get != NULL), cache_slot, &prop_info);
680
681 if (EXPECTED(IS_VALID_PROPERTY_OFFSET(property_offset))) {
682 retval = OBJ_PROP(zobj, property_offset);
683 if (EXPECTED(Z_TYPE_P(retval) != IS_UNDEF)) {
684 goto exit;
685 }
686 if (UNEXPECTED(Z_PROP_FLAG_P(retval) == IS_PROP_UNINIT)) {
687 /* Skip __get() for uninitialized typed properties */
688 goto uninit_error;
689 }
690 } else if (EXPECTED(IS_DYNAMIC_PROPERTY_OFFSET(property_offset))) {
691 if (EXPECTED(zobj->properties != NULL)) {
692 if (!IS_UNKNOWN_DYNAMIC_PROPERTY_OFFSET(property_offset)) {
693 uintptr_t idx = ZEND_DECODE_DYN_PROP_OFFSET(property_offset);
694
695 if (EXPECTED(idx < zobj->properties->nNumUsed * sizeof(Bucket))) {
696 Bucket *p = (Bucket*)((char*)zobj->properties->arData + idx);
697
698 if (EXPECTED(Z_TYPE(p->val) != IS_UNDEF) &&
699 (EXPECTED(p->key == name) ||
700 (EXPECTED(p->h == ZSTR_H(name)) &&
701 EXPECTED(p->key != NULL) &&
702 EXPECTED(zend_string_equal_content(p->key, name))))) {
703 retval = &p->val;
704 goto exit;
705 }
706 }
707 CACHE_PTR_EX(cache_slot + 1, (void*)ZEND_DYNAMIC_PROPERTY_OFFSET);
708 }
709 retval = zend_hash_find(zobj->properties, name);
710 if (EXPECTED(retval)) {
711 if (cache_slot) {
712 uintptr_t idx = (char*)retval - (char*)zobj->properties->arData;
713 CACHE_PTR_EX(cache_slot + 1, (void*)ZEND_ENCODE_DYN_PROP_OFFSET(idx));
714 }
715 goto exit;
716 }
717 }
718 } else if (UNEXPECTED(EG(exception))) {
719 retval = &EG(uninitialized_zval);
720 goto exit;
721 }
722
723 /* magic isset */
724 if ((type == BP_VAR_IS) && zobj->ce->__isset) {
725 zval tmp_result;
726 guard = zend_get_property_guard(zobj, name);
727
728 if (!((*guard) & IN_ISSET)) {
729 if (!tmp_name && !ZSTR_IS_INTERNED(name)) {
730 tmp_name = zend_string_copy(name);
731 }
732 GC_ADDREF(zobj);
733 ZVAL_UNDEF(&tmp_result);
734
735 *guard |= IN_ISSET;
736 zend_std_call_issetter(zobj, name, &tmp_result);
737 *guard &= ~IN_ISSET;
738
739 if (!zend_is_true(&tmp_result)) {
740 retval = &EG(uninitialized_zval);
741 OBJ_RELEASE(zobj);
742 zval_ptr_dtor(&tmp_result);
743 goto exit;
744 }
745
746 zval_ptr_dtor(&tmp_result);
747 if (zobj->ce->__get && !((*guard) & IN_GET)) {
748 goto call_getter;
749 }
750 OBJ_RELEASE(zobj);
751 } else if (zobj->ce->__get && !((*guard) & IN_GET)) {
752 goto call_getter_addref;
753 }
754 } else if (zobj->ce->__get) {
755 /* magic get */
756 guard = zend_get_property_guard(zobj, name);
757 if (!((*guard) & IN_GET)) {
758 /* have getter - try with it! */
759 call_getter_addref:
760 GC_ADDREF(zobj);
761 call_getter:
762 *guard |= IN_GET; /* prevent circular getting */
763 zend_std_call_getter(zobj, name, rv);
764 *guard &= ~IN_GET;
765
766 if (Z_TYPE_P(rv) != IS_UNDEF) {
767 retval = rv;
768 if (!Z_ISREF_P(rv) &&
769 (type == BP_VAR_W || type == BP_VAR_RW || type == BP_VAR_UNSET)) {
770 if (UNEXPECTED(Z_TYPE_P(rv) != IS_OBJECT)) {
771 zend_error(E_NOTICE, "Indirect modification of overloaded property %s::$%s has no effect", ZSTR_VAL(zobj->ce->name), ZSTR_VAL(name));
772 }
773 }
774 } else {
775 retval = &EG(uninitialized_zval);
776 }
777
778 if (UNEXPECTED(prop_info)) {
779 zend_verify_prop_assignable_by_ref(prop_info, retval, (zobj->ce->__get->common.fn_flags & ZEND_ACC_STRICT_TYPES) != 0);
780 }
781
782 OBJ_RELEASE(zobj);
783 goto exit;
784 } else if (UNEXPECTED(IS_WRONG_PROPERTY_OFFSET(property_offset))) {
785 /* Trigger the correct error */
786 zend_get_property_offset(zobj->ce, name, 0, NULL, &prop_info);
787 ZEND_ASSERT(EG(exception));
788 retval = &EG(uninitialized_zval);
789 goto exit;
790 }
791 }
792
793 uninit_error:
794 if (type != BP_VAR_IS) {
795 if (UNEXPECTED(prop_info)) {
796 zend_throw_error(NULL, "Typed property %s::$%s must not be accessed before initialization",
797 ZSTR_VAL(prop_info->ce->name),
798 ZSTR_VAL(name));
799 } else {
800 zend_error(E_NOTICE,"Undefined property: %s::$%s", ZSTR_VAL(zobj->ce->name), ZSTR_VAL(name));
801 }
802 }
803 retval = &EG(uninitialized_zval);
804
805 exit:
806 zend_tmp_string_release(tmp_name);
807
808 return retval;
809 }
810 /* }}} */
811
property_uses_strict_typesnull812 static zend_always_inline zend_bool property_uses_strict_types() {
813 zend_execute_data *execute_data = EG(current_execute_data);
814 return execute_data
815 && execute_data->func
816 && ZEND_CALL_USES_STRICT_TYPES(EG(current_execute_data));
817 }
818
zend_std_write_property(zval *object, zval *member, zval *value, void **cache_slot)819 ZEND_API zval *zend_std_write_property(zval *object, zval *member, zval *value, void **cache_slot) /* {{{ */
820 {
821 zend_object *zobj;
822 zend_string *name, *tmp_name;
823 zval *variable_ptr, tmp;
824 uintptr_t property_offset;
825 zend_property_info *prop_info = NULL;
826 ZEND_ASSERT(!Z_ISREF_P(value));
827
828 zobj = Z_OBJ_P(object);
829 name = zval_try_get_tmp_string(member, &tmp_name);
830 if (UNEXPECTED(!name)) {
831 return value;
832 }
833
834 property_offset = zend_get_property_offset(zobj->ce, name, (zobj->ce->__set != NULL), cache_slot, &prop_info);
835
836 if (EXPECTED(IS_VALID_PROPERTY_OFFSET(property_offset))) {
837 variable_ptr = OBJ_PROP(zobj, property_offset);
838 if (Z_TYPE_P(variable_ptr) != IS_UNDEF) {
839 Z_TRY_ADDREF_P(value);
840
841 if (UNEXPECTED(prop_info)) {
842 ZVAL_COPY_VALUE(&tmp, value);
843 if (UNEXPECTED(!zend_verify_property_type(prop_info, &tmp, property_uses_strict_types()))) {
844 Z_TRY_DELREF_P(value);
845 variable_ptr = &EG(error_zval);
846 goto exit;
847 }
848 value = &tmp;
849 }
850
851 found:
852 zend_assign_to_variable(variable_ptr, value, IS_TMP_VAR, property_uses_strict_types());
853 goto exit;
854 }
855 if (Z_PROP_FLAG_P(variable_ptr) == IS_PROP_UNINIT) {
856 /* Writes to uninitializde typed properties bypass __set(). */
857 Z_PROP_FLAG_P(variable_ptr) = 0;
858 goto write_std_property;
859 }
860 } else if (EXPECTED(IS_DYNAMIC_PROPERTY_OFFSET(property_offset))) {
861 if (EXPECTED(zobj->properties != NULL)) {
862 if (UNEXPECTED(GC_REFCOUNT(zobj->properties) > 1)) {
863 if (EXPECTED(!(GC_FLAGS(zobj->properties) & IS_ARRAY_IMMUTABLE))) {
864 GC_DELREF(zobj->properties);
865 }
866 zobj->properties = zend_array_dup(zobj->properties);
867 }
868 if ((variable_ptr = zend_hash_find(zobj->properties, name)) != NULL) {
869 Z_TRY_ADDREF_P(value);
870 goto found;
871 }
872 }
873 } else if (UNEXPECTED(EG(exception))) {
874 variable_ptr = &EG(error_zval);
875 goto exit;
876 }
877
878 /* magic set */
879 if (zobj->ce->__set) {
880 uint32_t *guard = zend_get_property_guard(zobj, name);
881
882 if (!((*guard) & IN_SET)) {
883 GC_ADDREF(zobj);
884 (*guard) |= IN_SET; /* prevent circular setting */
885 zend_std_call_setter(zobj, name, value);
886 (*guard) &= ~IN_SET;
887 OBJ_RELEASE(zobj);
888 variable_ptr = value;
889 } else if (EXPECTED(!IS_WRONG_PROPERTY_OFFSET(property_offset))) {
890 goto write_std_property;
891 } else {
892 /* Trigger the correct error */
893 zend_wrong_offset(zobj->ce, name);
894 ZEND_ASSERT(EG(exception));
895 variable_ptr = &EG(error_zval);
896 goto exit;
897 }
898 } else {
899 ZEND_ASSERT(!IS_WRONG_PROPERTY_OFFSET(property_offset));
900 write_std_property:
901 Z_TRY_ADDREF_P(value);
902 if (EXPECTED(IS_VALID_PROPERTY_OFFSET(property_offset))) {
903
904 variable_ptr = OBJ_PROP(zobj, property_offset);
905
906 if (UNEXPECTED(prop_info)) {
907 ZVAL_COPY_VALUE(&tmp, value);
908 if (UNEXPECTED(!zend_verify_property_type(prop_info, &tmp, property_uses_strict_types()))) {
909 zval_ptr_dtor(value);
910 goto exit;
911 }
912 value = &tmp;
913 goto found; /* might have been updated via e.g. __toString() */
914 }
915
916 ZVAL_COPY_VALUE(variable_ptr, value);
917 } else {
918 if (!zobj->properties) {
919 rebuild_object_properties(zobj);
920 }
921 variable_ptr = zend_hash_add_new(zobj->properties, name, value);
922 }
923 }
924
925 exit:
926 zend_tmp_string_release(tmp_name);
927 return variable_ptr;
928 }
929 /* }}} */
930
zend_bad_array_access(zend_class_entry *ce)931 static ZEND_COLD zend_never_inline void zend_bad_array_access(zend_class_entry *ce) /* {{{ */
932 {
933 zend_throw_error(NULL, "Cannot use object of type %s as array", ZSTR_VAL(ce->name));
934 }
935 /* }}} */
936
zend_std_read_dimension(zval *object, zval *offset, int type, zval *rv)937 ZEND_API zval *zend_std_read_dimension(zval *object, zval *offset, int type, zval *rv) /* {{{ */
938 {
939 zend_class_entry *ce = Z_OBJCE_P(object);
940 zval tmp_offset, tmp_object;
941
942 if (EXPECTED(instanceof_function_ex(ce, zend_ce_arrayaccess, 1) != 0)) {
943 if (offset == NULL) {
944 /* [] construct */
945 ZVAL_NULL(&tmp_offset);
946 } else {
947 ZVAL_COPY_DEREF(&tmp_offset, offset);
948 }
949
950 Z_ADDREF_P(object);
951 ZVAL_OBJ(&tmp_object, Z_OBJ_P(object));
952 if (type == BP_VAR_IS) {
953 zend_call_method_with_1_params(&tmp_object, ce, NULL, "offsetexists", rv, &tmp_offset);
954 if (UNEXPECTED(Z_ISUNDEF_P(rv))) {
955 zval_ptr_dtor(&tmp_object);
956 zval_ptr_dtor(&tmp_offset);
957 return NULL;
958 }
959 if (!i_zend_is_true(rv)) {
960 zval_ptr_dtor(&tmp_object);
961 zval_ptr_dtor(&tmp_offset);
962 zval_ptr_dtor(rv);
963 return &EG(uninitialized_zval);
964 }
965 zval_ptr_dtor(rv);
966 }
967
968 zend_call_method_with_1_params(&tmp_object, ce, NULL, "offsetget", rv, &tmp_offset);
969
970 zval_ptr_dtor(&tmp_object);
971 zval_ptr_dtor(&tmp_offset);
972
973 if (UNEXPECTED(Z_TYPE_P(rv) == IS_UNDEF)) {
974 if (UNEXPECTED(!EG(exception))) {
975 zend_throw_error(NULL, "Undefined offset for object of type %s used as array", ZSTR_VAL(ce->name));
976 }
977 return NULL;
978 }
979 return rv;
980 } else {
981 zend_bad_array_access(ce);
982 return NULL;
983 }
984 }
985 /* }}} */
986
zend_std_write_dimension(zval *object, zval *offset, zval *value)987 ZEND_API void zend_std_write_dimension(zval *object, zval *offset, zval *value) /* {{{ */
988 {
989 zend_class_entry *ce = Z_OBJCE_P(object);
990 zval tmp_offset, tmp_object;
991
992 if (EXPECTED(instanceof_function_ex(ce, zend_ce_arrayaccess, 1) != 0)) {
993 if (!offset) {
994 ZVAL_NULL(&tmp_offset);
995 } else {
996 ZVAL_COPY_DEREF(&tmp_offset, offset);
997 }
998 Z_ADDREF_P(object);
999 ZVAL_OBJ(&tmp_object, Z_OBJ_P(object));
1000 zend_call_method_with_2_params(&tmp_object, ce, NULL, "offsetset", NULL, &tmp_offset, value);
1001 zval_ptr_dtor(&tmp_object);
1002 zval_ptr_dtor(&tmp_offset);
1003 } else {
1004 zend_bad_array_access(ce);
1005 }
1006 }
1007 /* }}} */
1008
zend_std_has_dimension(zval *object, zval *offset, int check_empty)1009 ZEND_API int zend_std_has_dimension(zval *object, zval *offset, int check_empty) /* {{{ */
1010 {
1011 zend_class_entry *ce = Z_OBJCE_P(object);
1012 zval retval, tmp_offset, tmp_object;
1013 int result;
1014
1015 if (EXPECTED(instanceof_function_ex(ce, zend_ce_arrayaccess, 1) != 0)) {
1016 ZVAL_COPY_DEREF(&tmp_offset, offset);
1017 Z_ADDREF_P(object);
1018 ZVAL_OBJ(&tmp_object, Z_OBJ_P(object));
1019 zend_call_method_with_1_params(&tmp_object, ce, NULL, "offsetexists", &retval, &tmp_offset);
1020 result = i_zend_is_true(&retval);
1021 zval_ptr_dtor(&retval);
1022 if (check_empty && result && EXPECTED(!EG(exception))) {
1023 zend_call_method_with_1_params(&tmp_object, ce, NULL, "offsetget", &retval, &tmp_offset);
1024 result = i_zend_is_true(&retval);
1025 zval_ptr_dtor(&retval);
1026 }
1027 zval_ptr_dtor(&tmp_object);
1028 zval_ptr_dtor(&tmp_offset);
1029 } else {
1030 zend_bad_array_access(ce);
1031 return 0;
1032 }
1033 return result;
1034 }
1035 /* }}} */
1036
zend_std_get_property_ptr_ptr(zval *object, zval *member, int type, void **cache_slot)1037 ZEND_API zval *zend_std_get_property_ptr_ptr(zval *object, zval *member, int type, void **cache_slot) /* {{{ */
1038 {
1039 zend_object *zobj;
1040 zend_string *name, *tmp_name;
1041 zval *retval = NULL;
1042 uintptr_t property_offset;
1043 zend_property_info *prop_info = NULL;
1044
1045 zobj = Z_OBJ_P(object);
1046 name = zval_try_get_tmp_string(member, &tmp_name);
1047 if (UNEXPECTED(!name)) {
1048 return &EG(error_zval);
1049 }
1050
1051 #if DEBUG_OBJECT_HANDLERS
1052 fprintf(stderr, "Ptr object #%d property: %s\n", Z_OBJ_HANDLE_P(object), ZSTR_VAL(name));
1053 #endif
1054
1055 property_offset = zend_get_property_offset(zobj->ce, name, (zobj->ce->__get != NULL), cache_slot, &prop_info);
1056
1057 if (EXPECTED(IS_VALID_PROPERTY_OFFSET(property_offset))) {
1058 retval = OBJ_PROP(zobj, property_offset);
1059 if (UNEXPECTED(Z_TYPE_P(retval) == IS_UNDEF)) {
1060 if (EXPECTED(!zobj->ce->__get) ||
1061 UNEXPECTED((*zend_get_property_guard(zobj, name)) & IN_GET) ||
1062 UNEXPECTED(prop_info && Z_PROP_FLAG_P(retval) == IS_PROP_UNINIT)) {
1063 if (UNEXPECTED(type == BP_VAR_RW || type == BP_VAR_R)) {
1064 if (UNEXPECTED(prop_info)) {
1065 zend_throw_error(NULL,
1066 "Typed property %s::$%s must not be accessed before initialization",
1067 ZSTR_VAL(prop_info->ce->name),
1068 ZSTR_VAL(name));
1069 retval = &EG(error_zval);
1070 } else {
1071 ZVAL_NULL(retval);
1072 zend_error(E_NOTICE, "Undefined property: %s::$%s", ZSTR_VAL(zobj->ce->name), ZSTR_VAL(name));
1073 }
1074 }
1075 } else {
1076 /* we do have getter - fail and let it try again with usual get/set */
1077 retval = NULL;
1078 }
1079 }
1080 } else if (EXPECTED(IS_DYNAMIC_PROPERTY_OFFSET(property_offset))) {
1081 if (EXPECTED(zobj->properties)) {
1082 if (UNEXPECTED(GC_REFCOUNT(zobj->properties) > 1)) {
1083 if (EXPECTED(!(GC_FLAGS(zobj->properties) & IS_ARRAY_IMMUTABLE))) {
1084 GC_DELREF(zobj->properties);
1085 }
1086 zobj->properties = zend_array_dup(zobj->properties);
1087 }
1088 if (EXPECTED((retval = zend_hash_find(zobj->properties, name)) != NULL)) {
1089 zend_tmp_string_release(tmp_name);
1090 return retval;
1091 }
1092 }
1093 if (EXPECTED(!zobj->ce->__get) ||
1094 UNEXPECTED((*zend_get_property_guard(zobj, name)) & IN_GET)) {
1095 if (UNEXPECTED(!zobj->properties)) {
1096 rebuild_object_properties(zobj);
1097 }
1098 retval = zend_hash_update(zobj->properties, name, &EG(uninitialized_zval));
1099 /* Notice is thrown after creation of the property, to avoid EG(std_property_info)
1100 * being overwritten in an error handler. */
1101 if (UNEXPECTED(type == BP_VAR_RW || type == BP_VAR_R)) {
1102 zend_error(E_NOTICE, "Undefined property: %s::$%s", ZSTR_VAL(zobj->ce->name), ZSTR_VAL(name));
1103 }
1104 }
1105 } else if (zobj->ce->__get == NULL) {
1106 retval = &EG(error_zval);
1107 }
1108
1109 zend_tmp_string_release(tmp_name);
1110 return retval;
1111 }
1112 /* }}} */
1113
zend_std_unset_property(zval *object, zval *member, void **cache_slot)1114 ZEND_API void zend_std_unset_property(zval *object, zval *member, void **cache_slot) /* {{{ */
1115 {
1116 zend_object *zobj;
1117 zend_string *name, *tmp_name;
1118 uintptr_t property_offset;
1119 zend_property_info *prop_info = NULL;
1120
1121 zobj = Z_OBJ_P(object);
1122 name = zval_try_get_tmp_string(member, &tmp_name);
1123 if (UNEXPECTED(!name)) {
1124 return;
1125 }
1126
1127 property_offset = zend_get_property_offset(zobj->ce, name, (zobj->ce->__unset != NULL), cache_slot, &prop_info);
1128
1129 if (EXPECTED(IS_VALID_PROPERTY_OFFSET(property_offset))) {
1130 zval *slot = OBJ_PROP(zobj, property_offset);
1131
1132 if (Z_TYPE_P(slot) != IS_UNDEF) {
1133 if (UNEXPECTED(Z_ISREF_P(slot)) &&
1134 (ZEND_DEBUG || ZEND_REF_HAS_TYPE_SOURCES(Z_REF_P(slot)))) {
1135 if (prop_info) {
1136 ZEND_REF_DEL_TYPE_SOURCE(Z_REF_P(slot), prop_info);
1137 }
1138 }
1139 zval_ptr_dtor(slot);
1140 ZVAL_UNDEF(slot);
1141 if (zobj->properties) {
1142 HT_FLAGS(zobj->properties) |= HASH_FLAG_HAS_EMPTY_IND;
1143 }
1144 goto exit;
1145 }
1146 if (UNEXPECTED(Z_PROP_FLAG_P(slot) == IS_PROP_UNINIT)) {
1147 /* Reset the IS_PROP_UNINIT flag, if it exists and bypass __unset(). */
1148 Z_PROP_FLAG_P(slot) = 0;
1149 goto exit;
1150 }
1151 } else if (EXPECTED(IS_DYNAMIC_PROPERTY_OFFSET(property_offset))
1152 && EXPECTED(zobj->properties != NULL)) {
1153 if (UNEXPECTED(GC_REFCOUNT(zobj->properties) > 1)) {
1154 if (EXPECTED(!(GC_FLAGS(zobj->properties) & IS_ARRAY_IMMUTABLE))) {
1155 GC_DELREF(zobj->properties);
1156 }
1157 zobj->properties = zend_array_dup(zobj->properties);
1158 }
1159 if (EXPECTED(zend_hash_del(zobj->properties, name) != FAILURE)) {
1160 goto exit;
1161 }
1162 } else if (UNEXPECTED(EG(exception))) {
1163 goto exit;
1164 }
1165
1166 /* magic unset */
1167 if (zobj->ce->__unset) {
1168 uint32_t *guard = zend_get_property_guard(zobj, name);
1169 if (!((*guard) & IN_UNSET)) {
1170 /* have unseter - try with it! */
1171 (*guard) |= IN_UNSET; /* prevent circular unsetting */
1172 zend_std_call_unsetter(zobj, name);
1173 (*guard) &= ~IN_UNSET;
1174 } else if (UNEXPECTED(IS_WRONG_PROPERTY_OFFSET(property_offset))) {
1175 /* Trigger the correct error */
1176 zend_wrong_offset(zobj->ce, name);
1177 ZEND_ASSERT(EG(exception));
1178 goto exit;
1179 } else {
1180 /* Nothing to do: The property already does not exist. */
1181 }
1182 }
1183
1184 exit:
1185 zend_tmp_string_release(tmp_name);
1186 }
1187 /* }}} */
1188
zend_std_unset_dimension(zval *object, zval *offset)1189 ZEND_API void zend_std_unset_dimension(zval *object, zval *offset) /* {{{ */
1190 {
1191 zend_class_entry *ce = Z_OBJCE_P(object);
1192 zval tmp_offset, tmp_object;
1193
1194 if (instanceof_function_ex(ce, zend_ce_arrayaccess, 1)) {
1195 ZVAL_COPY_DEREF(&tmp_offset, offset);
1196 Z_ADDREF_P(object);
1197 ZVAL_OBJ(&tmp_object, Z_OBJ_P(object));
1198 zend_call_method_with_1_params(&tmp_object, ce, NULL, "offsetunset", NULL, &tmp_offset);
1199 zval_ptr_dtor(&tmp_object);
1200 zval_ptr_dtor(&tmp_offset);
1201 } else {
1202 zend_bad_array_access(ce);
1203 }
1204 }
1205 /* }}} */
1206
zend_get_parent_private_method(zend_class_entry *scope, zend_class_entry *ce, zend_string *function_name)1207 static zend_never_inline zend_function *zend_get_parent_private_method(zend_class_entry *scope, zend_class_entry *ce, zend_string *function_name) /* {{{ */
1208 {
1209 zval *func;
1210 zend_function *fbc;
1211
1212 if (scope != ce && scope && is_derived_class(ce, scope)) {
1213 func = zend_hash_find(&scope->function_table, function_name);
1214 if (func != NULL) {
1215 fbc = Z_FUNC_P(func);
1216 if (fbc->common.fn_flags & ZEND_ACC_PRIVATE
1217 && fbc->common.scope == scope) {
1218 return fbc;
1219 }
1220 }
1221 }
1222 return NULL;
1223 }
1224 /* }}} */
1225
1226 /* Ensures that we're allowed to call a protected method.
1227 */
zend_check_protected(zend_class_entry *ce, zend_class_entry *scope)1228 ZEND_API int zend_check_protected(zend_class_entry *ce, zend_class_entry *scope) /* {{{ */
1229 {
1230 zend_class_entry *fbc_scope = ce;
1231
1232 /* Is the context that's calling the function, the same as one of
1233 * the function's parents?
1234 */
1235 while (fbc_scope) {
1236 if (fbc_scope==scope) {
1237 return 1;
1238 }
1239 fbc_scope = fbc_scope->parent;
1240 }
1241
1242 /* Is the function's scope the same as our current object context,
1243 * or any of the parents of our context?
1244 */
1245 while (scope) {
1246 if (scope==ce) {
1247 return 1;
1248 }
1249 scope = scope->parent;
1250 }
1251 return 0;
1252 }
1253 /* }}} */
1254
zend_get_call_trampoline_func(zend_class_entry *ce, zend_string *method_name, int is_static)1255 ZEND_API zend_function *zend_get_call_trampoline_func(zend_class_entry *ce, zend_string *method_name, int is_static) /* {{{ */
1256 {
1257 size_t mname_len;
1258 zend_op_array *func;
1259 zend_function *fbc = is_static ? ce->__callstatic : ce->__call;
1260 /* We use non-NULL value to avoid useless run_time_cache allocation.
1261 * The low bit must be zero, to not be interpreted as a MAP_PTR offset.
1262 */
1263 static const void *dummy = (void*)(intptr_t)2;
1264
1265 ZEND_ASSERT(fbc);
1266
1267 if (EXPECTED(EG(trampoline).common.function_name == NULL)) {
1268 func = &EG(trampoline).op_array;
1269 } else {
1270 func = ecalloc(1, sizeof(zend_op_array));
1271 }
1272
1273 func->type = ZEND_USER_FUNCTION;
1274 func->arg_flags[0] = 0;
1275 func->arg_flags[1] = 0;
1276 func->arg_flags[2] = 0;
1277 func->fn_flags = ZEND_ACC_CALL_VIA_TRAMPOLINE | ZEND_ACC_PUBLIC;
1278 if (is_static) {
1279 func->fn_flags |= ZEND_ACC_STATIC;
1280 }
1281 func->opcodes = &EG(call_trampoline_op);
1282 ZEND_MAP_PTR_INIT(func->run_time_cache, (void***)&dummy);
1283 func->scope = fbc->common.scope;
1284 /* reserve space for arguments, local and temporary variables */
1285 func->T = (fbc->type == ZEND_USER_FUNCTION)? MAX(fbc->op_array.last_var + fbc->op_array.T, 2) : 2;
1286 func->filename = (fbc->type == ZEND_USER_FUNCTION)? fbc->op_array.filename : ZSTR_EMPTY_ALLOC();
1287 func->line_start = (fbc->type == ZEND_USER_FUNCTION)? fbc->op_array.line_start : 0;
1288 func->line_end = (fbc->type == ZEND_USER_FUNCTION)? fbc->op_array.line_end : 0;
1289
1290 //??? keep compatibility for "\0" characters
1291 //??? see: Zend/tests/bug46238.phpt
1292 if (UNEXPECTED((mname_len = strlen(ZSTR_VAL(method_name))) != ZSTR_LEN(method_name))) {
1293 func->function_name = zend_string_init(ZSTR_VAL(method_name), mname_len, 0);
1294 } else {
1295 func->function_name = zend_string_copy(method_name);
1296 }
1297
1298 func->prototype = NULL;
1299 func->num_args = 0;
1300 func->required_num_args = 0;
1301 func->arg_info = 0;
1302
1303 return (zend_function*)func;
1304 }
1305 /* }}} */
1306
zend_get_user_call_function(zend_class_entry *ce, zend_string *method_name)1307 static zend_always_inline zend_function *zend_get_user_call_function(zend_class_entry *ce, zend_string *method_name) /* {{{ */
1308 {
1309 return zend_get_call_trampoline_func(ce, method_name, 0);
1310 }
1311 /* }}} */
1312
zend_bad_method_call(zend_function *fbc, zend_string *method_name, zend_class_entry *scope)1313 static ZEND_COLD zend_never_inline void zend_bad_method_call(zend_function *fbc, zend_string *method_name, zend_class_entry *scope) /* {{{ */
1314 {
1315 zend_throw_error(NULL, "Call to %s method %s::%s() from context '%s'", zend_visibility_string(fbc->common.fn_flags), ZEND_FN_SCOPE_NAME(fbc), ZSTR_VAL(method_name), scope ? ZSTR_VAL(scope->name) : "");
1316 }
1317 /* }}} */
1318
zend_std_get_method(zend_object **obj_ptr, zend_string *method_name, const zval *key)1319 ZEND_API zend_function *zend_std_get_method(zend_object **obj_ptr, zend_string *method_name, const zval *key) /* {{{ */
1320 {
1321 zend_object *zobj = *obj_ptr;
1322 zval *func;
1323 zend_function *fbc;
1324 zend_string *lc_method_name;
1325 zend_class_entry *scope;
1326 ALLOCA_FLAG(use_heap);
1327
1328 if (EXPECTED(key != NULL)) {
1329 lc_method_name = Z_STR_P(key);
1330 #ifdef ZEND_ALLOCA_MAX_SIZE
1331 use_heap = 0;
1332 #endif
1333 } else {
1334 ZSTR_ALLOCA_ALLOC(lc_method_name, ZSTR_LEN(method_name), use_heap);
1335 zend_str_tolower_copy(ZSTR_VAL(lc_method_name), ZSTR_VAL(method_name), ZSTR_LEN(method_name));
1336 }
1337
1338 if (UNEXPECTED((func = zend_hash_find(&zobj->ce->function_table, lc_method_name)) == NULL)) {
1339 if (UNEXPECTED(!key)) {
1340 ZSTR_ALLOCA_FREE(lc_method_name, use_heap);
1341 }
1342 if (zobj->ce->__call) {
1343 return zend_get_user_call_function(zobj->ce, method_name);
1344 } else {
1345 return NULL;
1346 }
1347 }
1348
1349 fbc = Z_FUNC_P(func);
1350
1351 /* Check access level */
1352 if (fbc->op_array.fn_flags & (ZEND_ACC_CHANGED|ZEND_ACC_PRIVATE|ZEND_ACC_PROTECTED)) {
1353 scope = zend_get_executed_scope();
1354
1355 if (fbc->common.scope != scope) {
1356 if (fbc->op_array.fn_flags & ZEND_ACC_CHANGED) {
1357 zend_function *updated_fbc = zend_get_parent_private_method(scope, zobj->ce, lc_method_name);
1358
1359 if (EXPECTED(updated_fbc != NULL)) {
1360 fbc = updated_fbc;
1361 goto exit;
1362 } else if (fbc->op_array.fn_flags & ZEND_ACC_PUBLIC) {
1363 goto exit;
1364 }
1365 }
1366 if (UNEXPECTED(fbc->op_array.fn_flags & ZEND_ACC_PRIVATE)
1367 || UNEXPECTED(!zend_check_protected(zend_get_function_root_class(fbc), scope))) {
1368 if (zobj->ce->__call) {
1369 fbc = zend_get_user_call_function(zobj->ce, method_name);
1370 } else {
1371 zend_bad_method_call(fbc, method_name, scope);
1372 fbc = NULL;
1373 }
1374 }
1375 }
1376 }
1377
1378 exit:
1379 if (UNEXPECTED(!key)) {
1380 ZSTR_ALLOCA_FREE(lc_method_name, use_heap);
1381 }
1382 return fbc;
1383 }
1384 /* }}} */
1385
zend_get_user_callstatic_function(zend_class_entry *ce, zend_string *method_name)1386 static zend_always_inline zend_function *zend_get_user_callstatic_function(zend_class_entry *ce, zend_string *method_name) /* {{{ */
1387 {
1388 return zend_get_call_trampoline_func(ce, method_name, 1);
1389 }
1390 /* }}} */
1391
zend_std_get_static_method(zend_class_entry *ce, zend_string *function_name, const zval *key)1392 ZEND_API zend_function *zend_std_get_static_method(zend_class_entry *ce, zend_string *function_name, const zval *key) /* {{{ */
1393 {
1394 zend_function *fbc = NULL;
1395 zend_string *lc_function_name;
1396 zend_object *object;
1397 zend_class_entry *scope;
1398
1399 if (EXPECTED(key != NULL)) {
1400 lc_function_name = Z_STR_P(key);
1401 } else {
1402 lc_function_name = zend_string_tolower(function_name);
1403 }
1404
1405 do {
1406 zval *func = zend_hash_find(&ce->function_table, lc_function_name);
1407 if (EXPECTED(func != NULL)) {
1408 fbc = Z_FUNC_P(func);
1409 } else if (ce->constructor
1410 && ZSTR_LEN(lc_function_name) == ZSTR_LEN(ce->name)
1411 && zend_binary_strncasecmp(ZSTR_VAL(lc_function_name), ZSTR_LEN(lc_function_name), ZSTR_VAL(ce->name), ZSTR_LEN(lc_function_name), ZSTR_LEN(lc_function_name)) == 0
1412 /* Only change the method to the constructor if the constructor isn't called __construct
1413 * we check for __ so we can be binary safe for lowering, we should use ZEND_CONSTRUCTOR_FUNC_NAME
1414 */
1415 && (ZSTR_VAL(ce->constructor->common.function_name)[0] != '_'
1416 || ZSTR_VAL(ce->constructor->common.function_name)[1] != '_')) {
1417 fbc = ce->constructor;
1418 } else {
1419 if (UNEXPECTED(!key)) {
1420 zend_string_release_ex(lc_function_name, 0);
1421 }
1422 if (ce->__call &&
1423 (object = zend_get_this_object(EG(current_execute_data))) != NULL &&
1424 instanceof_function(object->ce, ce)) {
1425 /* Call the top-level defined __call().
1426 * see: tests/classes/__call_004.phpt */
1427
1428 zend_class_entry *call_ce = object->ce;
1429
1430 while (!call_ce->__call) {
1431 call_ce = call_ce->parent;
1432 }
1433 return zend_get_user_call_function(call_ce, function_name);
1434 } else if (ce->__callstatic) {
1435 return zend_get_user_callstatic_function(ce, function_name);
1436 } else {
1437 return NULL;
1438 }
1439 }
1440 } while (0);
1441
1442 #if MBO_0
1443 /* right now this function is used for non static method lookup too */
1444 /* Is the function static */
1445 if (UNEXPECTED(!(fbc->common.fn_flags & ZEND_ACC_STATIC))) {
1446 zend_error_noreturn(E_ERROR, "Cannot call non static method %s::%s() without object", ZEND_FN_SCOPE_NAME(fbc), ZSTR_VAL(fbc->common.function_name));
1447 }
1448 #endif
1449 if (!(fbc->op_array.fn_flags & ZEND_ACC_PUBLIC)) {
1450 scope = zend_get_executed_scope();
1451 if (UNEXPECTED(fbc->common.scope != scope)) {
1452 if (UNEXPECTED(fbc->op_array.fn_flags & ZEND_ACC_PRIVATE)
1453 || UNEXPECTED(!zend_check_protected(zend_get_function_root_class(fbc), scope))) {
1454 if (ce->__callstatic) {
1455 fbc = zend_get_user_callstatic_function(ce, function_name);
1456 } else {
1457 zend_bad_method_call(fbc, function_name, scope);
1458 fbc = NULL;
1459 }
1460 }
1461 }
1462 }
1463
1464 if (UNEXPECTED(!key)) {
1465 zend_string_release_ex(lc_function_name, 0);
1466 }
1467
1468 return fbc;
1469 }
1470 /* }}} */
1471
zend_class_init_statics(zend_class_entry *class_type)1472 ZEND_API void zend_class_init_statics(zend_class_entry *class_type) /* {{{ */
1473 {
1474 int i;
1475 zval *p;
1476
1477 if (class_type->default_static_members_count && !CE_STATIC_MEMBERS(class_type)) {
1478 if (class_type->parent) {
1479 zend_class_init_statics(class_type->parent);
1480 }
1481
1482 ZEND_MAP_PTR_SET(class_type->static_members_table, emalloc(sizeof(zval) * class_type->default_static_members_count));
1483 for (i = 0; i < class_type->default_static_members_count; i++) {
1484 p = &class_type->default_static_members_table[i];
1485 if (Z_TYPE_P(p) == IS_INDIRECT) {
1486 zval *q = &CE_STATIC_MEMBERS(class_type->parent)[i];
1487 ZVAL_DEINDIRECT(q);
1488 ZVAL_INDIRECT(&CE_STATIC_MEMBERS(class_type)[i], q);
1489 } else {
1490 ZVAL_COPY_OR_DUP(&CE_STATIC_MEMBERS(class_type)[i], p);
1491 }
1492 }
1493 }
1494 } /* }}} */
1495
zend_std_get_static_property_with_info(zend_class_entry *ce, zend_string *property_name, int type, zend_property_info **property_info_ptr)1496 ZEND_API zval *zend_std_get_static_property_with_info(zend_class_entry *ce, zend_string *property_name, int type, zend_property_info **property_info_ptr) /* {{{ */
1497 {
1498 zval *ret;
1499 zend_class_entry *scope;
1500 zend_property_info *property_info = zend_hash_find_ptr(&ce->properties_info, property_name);
1501 *property_info_ptr = property_info;
1502
1503 if (UNEXPECTED(property_info == NULL)) {
1504 goto undeclared_property;
1505 }
1506
1507 if (!(property_info->flags & ZEND_ACC_PUBLIC)) {
1508 if (UNEXPECTED(EG(fake_scope))) {
1509 scope = EG(fake_scope);
1510 } else {
1511 scope = zend_get_executed_scope();
1512 }
1513 if (property_info->ce != scope) {
1514 if (UNEXPECTED(property_info->flags & ZEND_ACC_PRIVATE)
1515 || UNEXPECTED(!is_protected_compatible_scope(property_info->ce, scope))) {
1516 if (type != BP_VAR_IS) {
1517 zend_bad_property_access(property_info, ce, property_name);
1518 }
1519 return NULL;
1520 }
1521 }
1522 }
1523
1524 if (UNEXPECTED((property_info->flags & ZEND_ACC_STATIC) == 0)) {
1525 goto undeclared_property;
1526 }
1527
1528 if (UNEXPECTED(!(ce->ce_flags & ZEND_ACC_CONSTANTS_UPDATED))) {
1529 if (UNEXPECTED(zend_update_class_constants(ce)) != SUCCESS) {
1530 return NULL;
1531 }
1532 }
1533
1534 /* check if static properties were destroyed */
1535 if (UNEXPECTED(CE_STATIC_MEMBERS(ce) == NULL)) {
1536 if (ce->type == ZEND_INTERNAL_CLASS || (ce->ce_flags & (ZEND_ACC_IMMUTABLE|ZEND_ACC_PRELOADED))) {
1537 zend_class_init_statics(ce);
1538 } else {
1539 undeclared_property:
1540 if (type != BP_VAR_IS) {
1541 zend_throw_error(NULL, "Access to undeclared static property: %s::$%s", ZSTR_VAL(ce->name), ZSTR_VAL(property_name));
1542 }
1543 return NULL;
1544 }
1545 }
1546
1547 ret = CE_STATIC_MEMBERS(ce) + property_info->offset;
1548 ZVAL_DEINDIRECT(ret);
1549
1550 if (UNEXPECTED((type == BP_VAR_R || type == BP_VAR_RW)
1551 && Z_TYPE_P(ret) == IS_UNDEF && property_info->type != 0)) {
1552 zend_throw_error(NULL, "Typed static property %s::$%s must not be accessed before initialization",
1553 ZSTR_VAL(property_info->ce->name),
1554 zend_get_unmangled_property_name(property_name));
1555 return NULL;
1556 }
1557
1558 return ret;
1559 }
1560 /* }}} */
1561
zend_std_get_static_property(zend_class_entry *ce, zend_string *property_name, int type)1562 ZEND_API zval *zend_std_get_static_property(zend_class_entry *ce, zend_string *property_name, int type) /* {{{ */
1563 {
1564 zend_property_info *prop_info;
1565 return zend_std_get_static_property_with_info(ce, property_name, type, &prop_info);
1566 }
1567
zend_std_unset_static_property(zend_class_entry *ce, zend_string *property_name)1568 ZEND_API ZEND_COLD zend_bool zend_std_unset_static_property(zend_class_entry *ce, zend_string *property_name) /* {{{ */
1569 {
1570 zend_throw_error(NULL, "Attempt to unset static property %s::$%s", ZSTR_VAL(ce->name), ZSTR_VAL(property_name));
1571 return 0;
1572 }
1573 /* }}} */
1574
zend_bad_constructor_call(zend_function *constructor, zend_class_entry *scope)1575 static ZEND_COLD zend_never_inline void zend_bad_constructor_call(zend_function *constructor, zend_class_entry *scope) /* {{{ */
1576 {
1577 if (scope) {
1578 zend_throw_error(NULL, "Call to %s %s::%s() from context '%s'", zend_visibility_string(constructor->common.fn_flags), ZSTR_VAL(constructor->common.scope->name), ZSTR_VAL(constructor->common.function_name), ZSTR_VAL(scope->name));
1579 } else {
1580 zend_throw_error(NULL, "Call to %s %s::%s() from invalid context", zend_visibility_string(constructor->common.fn_flags), ZSTR_VAL(constructor->common.scope->name), ZSTR_VAL(constructor->common.function_name));
1581 }
1582 }
1583 /* }}} */
1584
zend_std_get_constructor(zend_object *zobj)1585 ZEND_API zend_function *zend_std_get_constructor(zend_object *zobj) /* {{{ */
1586 {
1587 zend_function *constructor = zobj->ce->constructor;
1588 zend_class_entry *scope;
1589
1590 if (constructor) {
1591 if (UNEXPECTED(!(constructor->op_array.fn_flags & ZEND_ACC_PUBLIC))) {
1592 if (UNEXPECTED(EG(fake_scope))) {
1593 scope = EG(fake_scope);
1594 } else {
1595 scope = zend_get_executed_scope();
1596 }
1597 if (UNEXPECTED(constructor->common.scope != scope)) {
1598 if (UNEXPECTED(constructor->op_array.fn_flags & ZEND_ACC_PRIVATE)
1599 || UNEXPECTED(!zend_check_protected(zend_get_function_root_class(constructor), scope))) {
1600 zend_bad_constructor_call(constructor, scope);
1601 constructor = NULL;
1602 }
1603 }
1604 }
1605 }
1606
1607 return constructor;
1608 }
1609 /* }}} */
1610
zend_std_compare_objects(zval *o1, zval *o2)1611 ZEND_API int zend_std_compare_objects(zval *o1, zval *o2) /* {{{ */
1612 {
1613 zend_object *zobj1, *zobj2;
1614
1615 zobj1 = Z_OBJ_P(o1);
1616 zobj2 = Z_OBJ_P(o2);
1617
1618 if (zobj1 == zobj2) {
1619 return 0; /* the same object */
1620 }
1621 if (zobj1->ce != zobj2->ce) {
1622 return 1; /* different classes */
1623 }
1624 if (!zobj1->properties && !zobj2->properties) {
1625 zend_property_info *info;
1626
1627 if (!zobj1->ce->default_properties_count) {
1628 return 0;
1629 }
1630
1631 /* It's enough to protect only one of the objects.
1632 * The second one may be referenced from the first and this may cause
1633 * false recursion detection.
1634 */
1635 /* use bitwise OR to make only one conditional jump */
1636 if (UNEXPECTED(Z_IS_RECURSIVE_P(o1))) {
1637 zend_error_noreturn(E_ERROR, "Nesting level too deep - recursive dependency?");
1638 }
1639 Z_PROTECT_RECURSION_P(o1);
1640
1641 ZEND_HASH_FOREACH_PTR(&zobj1->ce->properties_info, info) {
1642 zval *p1 = OBJ_PROP(zobj1, info->offset);
1643 zval *p2 = OBJ_PROP(zobj2, info->offset);
1644
1645 if (info->flags & ZEND_ACC_STATIC) {
1646 continue;
1647 }
1648
1649 if (Z_TYPE_P(p1) != IS_UNDEF) {
1650 if (Z_TYPE_P(p2) != IS_UNDEF) {
1651 zval result;
1652
1653 if (compare_function(&result, p1, p2)==FAILURE) {
1654 Z_UNPROTECT_RECURSION_P(o1);
1655 return 1;
1656 }
1657 if (Z_LVAL(result) != 0) {
1658 Z_UNPROTECT_RECURSION_P(o1);
1659 return Z_LVAL(result);
1660 }
1661 } else {
1662 Z_UNPROTECT_RECURSION_P(o1);
1663 return 1;
1664 }
1665 } else {
1666 if (Z_TYPE_P(p2) != IS_UNDEF) {
1667 Z_UNPROTECT_RECURSION_P(o1);
1668 return 1;
1669 }
1670 }
1671 } ZEND_HASH_FOREACH_END();
1672
1673 Z_UNPROTECT_RECURSION_P(o1);
1674 return 0;
1675 } else {
1676 if (!zobj1->properties) {
1677 rebuild_object_properties(zobj1);
1678 }
1679 if (!zobj2->properties) {
1680 rebuild_object_properties(zobj2);
1681 }
1682 return zend_compare_symbol_tables(zobj1->properties, zobj2->properties);
1683 }
1684 }
1685 /* }}} */
1686
zend_std_has_property(zval *object, zval *member, int has_set_exists, void **cache_slot)1687 ZEND_API int zend_std_has_property(zval *object, zval *member, int has_set_exists, void **cache_slot) /* {{{ */
1688 {
1689 zend_object *zobj;
1690 int result;
1691 zval *value = NULL;
1692 zend_string *name, *tmp_name;
1693 uintptr_t property_offset;
1694 zend_property_info *prop_info = NULL;
1695
1696 zobj = Z_OBJ_P(object);
1697 name = zval_try_get_tmp_string(member, &tmp_name);
1698 if (UNEXPECTED(!name)) {
1699 return 0;
1700 }
1701
1702 property_offset = zend_get_property_offset(zobj->ce, name, 1, cache_slot, &prop_info);
1703
1704 if (EXPECTED(IS_VALID_PROPERTY_OFFSET(property_offset))) {
1705 value = OBJ_PROP(zobj, property_offset);
1706 if (Z_TYPE_P(value) != IS_UNDEF) {
1707 goto found;
1708 }
1709 if (UNEXPECTED(Z_PROP_FLAG_P(value) == IS_PROP_UNINIT)) {
1710 /* Skip __isset() for uninitialized typed properties */
1711 result = 0;
1712 goto exit;
1713 }
1714 } else if (EXPECTED(IS_DYNAMIC_PROPERTY_OFFSET(property_offset))) {
1715 if (EXPECTED(zobj->properties != NULL)) {
1716 if (!IS_UNKNOWN_DYNAMIC_PROPERTY_OFFSET(property_offset)) {
1717 uintptr_t idx = ZEND_DECODE_DYN_PROP_OFFSET(property_offset);
1718
1719 if (EXPECTED(idx < zobj->properties->nNumUsed * sizeof(Bucket))) {
1720 Bucket *p = (Bucket*)((char*)zobj->properties->arData + idx);
1721
1722 if (EXPECTED(Z_TYPE(p->val) != IS_UNDEF) &&
1723 (EXPECTED(p->key == name) ||
1724 (EXPECTED(p->h == ZSTR_H(name)) &&
1725 EXPECTED(p->key != NULL) &&
1726 EXPECTED(zend_string_equal_content(p->key, name))))) {
1727 value = &p->val;
1728 goto found;
1729 }
1730 }
1731 CACHE_PTR_EX(cache_slot + 1, (void*)ZEND_DYNAMIC_PROPERTY_OFFSET);
1732 }
1733 value = zend_hash_find(zobj->properties, name);
1734 if (value) {
1735 if (cache_slot) {
1736 uintptr_t idx = (char*)value - (char*)zobj->properties->arData;
1737 CACHE_PTR_EX(cache_slot + 1, (void*)ZEND_ENCODE_DYN_PROP_OFFSET(idx));
1738 }
1739 found:
1740 if (has_set_exists == ZEND_PROPERTY_NOT_EMPTY) {
1741 result = zend_is_true(value);
1742 } else if (has_set_exists < ZEND_PROPERTY_NOT_EMPTY) {
1743 ZEND_ASSERT(has_set_exists == ZEND_PROPERTY_ISSET);
1744 ZVAL_DEREF(value);
1745 result = (Z_TYPE_P(value) != IS_NULL);
1746 } else {
1747 ZEND_ASSERT(has_set_exists == ZEND_PROPERTY_EXISTS);
1748 result = 1;
1749 }
1750 goto exit;
1751 }
1752 }
1753 } else if (UNEXPECTED(EG(exception))) {
1754 result = 0;
1755 goto exit;
1756 }
1757
1758 result = 0;
1759 if ((has_set_exists != ZEND_PROPERTY_EXISTS) && zobj->ce->__isset) {
1760 uint32_t *guard = zend_get_property_guard(zobj, name);
1761
1762 if (!((*guard) & IN_ISSET)) {
1763 zval rv;
1764
1765 /* have issetter - try with it! */
1766 if (!tmp_name && !ZSTR_IS_INTERNED(name)) {
1767 tmp_name = zend_string_copy(name);
1768 }
1769 GC_ADDREF(zobj);
1770 (*guard) |= IN_ISSET; /* prevent circular getting */
1771 zend_std_call_issetter(zobj, name, &rv);
1772 result = zend_is_true(&rv);
1773 zval_ptr_dtor(&rv);
1774 if (has_set_exists == ZEND_PROPERTY_NOT_EMPTY && result) {
1775 if (EXPECTED(!EG(exception)) && zobj->ce->__get && !((*guard) & IN_GET)) {
1776 (*guard) |= IN_GET;
1777 zend_std_call_getter(zobj, name, &rv);
1778 (*guard) &= ~IN_GET;
1779 result = i_zend_is_true(&rv);
1780 zval_ptr_dtor(&rv);
1781 } else {
1782 result = 0;
1783 }
1784 }
1785 (*guard) &= ~IN_ISSET;
1786 OBJ_RELEASE(zobj);
1787 }
1788 }
1789
1790 exit:
1791 zend_tmp_string_release(tmp_name);
1792 return result;
1793 }
1794 /* }}} */
1795
zend_std_get_class_name(const zend_object *zobj)1796 ZEND_API zend_string *zend_std_get_class_name(const zend_object *zobj) /* {{{ */
1797 {
1798 return zend_string_copy(zobj->ce->name);
1799 }
1800 /* }}} */
1801
zend_std_cast_object_tostring(zval *readobj, zval *writeobj, int type)1802 ZEND_API int zend_std_cast_object_tostring(zval *readobj, zval *writeobj, int type) /* {{{ */
1803 {
1804 zval retval;
1805 zend_class_entry *ce;
1806
1807 switch (type) {
1808 case IS_STRING:
1809 ce = Z_OBJCE_P(readobj);
1810 if (ce->__tostring) {
1811 zend_class_entry *fake_scope = EG(fake_scope);
1812 EG(fake_scope) = NULL;
1813 zend_call_method_with_0_params(readobj, ce, &ce->__tostring, "__tostring", &retval);
1814 EG(fake_scope) = fake_scope;
1815 if (EXPECTED(Z_TYPE(retval) == IS_STRING)) {
1816 ZVAL_COPY_VALUE(writeobj, &retval);
1817 return SUCCESS;
1818 }
1819 zval_ptr_dtor(&retval);
1820 if (!EG(exception)) {
1821 zend_throw_error(NULL, "Method %s::__toString() must return a string value", ZSTR_VAL(ce->name));
1822 }
1823 }
1824 return FAILURE;
1825 case _IS_BOOL:
1826 ZVAL_TRUE(writeobj);
1827 return SUCCESS;
1828 case IS_LONG:
1829 ce = Z_OBJCE_P(readobj);
1830 zend_error(E_NOTICE, "Object of class %s could not be converted to int", ZSTR_VAL(ce->name));
1831 ZVAL_LONG(writeobj, 1);
1832 return SUCCESS;
1833 case IS_DOUBLE:
1834 ce = Z_OBJCE_P(readobj);
1835 zend_error(E_NOTICE, "Object of class %s could not be converted to float", ZSTR_VAL(ce->name));
1836 ZVAL_DOUBLE(writeobj, 1);
1837 return SUCCESS;
1838 case _IS_NUMBER:
1839 ce = Z_OBJCE_P(readobj);
1840 zend_error(E_NOTICE, "Object of class %s could not be converted to number", ZSTR_VAL(ce->name));
1841 ZVAL_LONG(writeobj, 1);
1842 return SUCCESS;
1843 default:
1844 ZVAL_NULL(writeobj);
1845 break;
1846 }
1847 return FAILURE;
1848 }
1849 /* }}} */
1850
zend_std_get_closure(zval *obj, zend_class_entry **ce_ptr, zend_function **fptr_ptr, zend_object **obj_ptr)1851 ZEND_API int zend_std_get_closure(zval *obj, zend_class_entry **ce_ptr, zend_function **fptr_ptr, zend_object **obj_ptr) /* {{{ */
1852 {
1853 zval *func;
1854 zend_class_entry *ce = Z_OBJCE_P(obj);
1855
1856 if ((func = zend_hash_find_ex(&ce->function_table, ZSTR_KNOWN(ZEND_STR_MAGIC_INVOKE), 1)) == NULL) {
1857 return FAILURE;
1858 }
1859 *fptr_ptr = Z_FUNC_P(func);
1860
1861 *ce_ptr = ce;
1862 if ((*fptr_ptr)->common.fn_flags & ZEND_ACC_STATIC) {
1863 if (obj_ptr) {
1864 *obj_ptr = NULL;
1865 }
1866 } else {
1867 if (obj_ptr) {
1868 *obj_ptr = Z_OBJ_P(obj);
1869 }
1870 }
1871 return SUCCESS;
1872 }
1873 /* }}} */
1874
zend_std_get_properties_for(zval *obj, zend_prop_purpose purpose)1875 ZEND_API HashTable *zend_std_get_properties_for(zval *obj, zend_prop_purpose purpose) {
1876 HashTable *ht;
1877 switch (purpose) {
1878 case ZEND_PROP_PURPOSE_DEBUG:
1879 if (Z_OBJ_HT_P(obj)->get_debug_info) {
1880 int is_temp;
1881 ht = Z_OBJ_HT_P(obj)->get_debug_info(obj, &is_temp);
1882 if (ht && !is_temp && !(GC_FLAGS(ht) & GC_IMMUTABLE)) {
1883 GC_ADDREF(ht);
1884 }
1885 return ht;
1886 }
1887 /* break missing intentionally */
1888 case ZEND_PROP_PURPOSE_ARRAY_CAST:
1889 case ZEND_PROP_PURPOSE_SERIALIZE:
1890 case ZEND_PROP_PURPOSE_VAR_EXPORT:
1891 case ZEND_PROP_PURPOSE_JSON:
1892 case _ZEND_PROP_PURPOSE_ARRAY_KEY_EXISTS:
1893 ht = Z_OBJ_HT_P(obj)->get_properties(obj);
1894 if (ht && !(GC_FLAGS(ht) & GC_IMMUTABLE)) {
1895 GC_ADDREF(ht);
1896 }
1897 return ht;
1898 default:
1899 ZEND_ASSERT(0);
1900 return NULL;
1901 }
1902 }
1903
zend_get_properties_for(zval *obj, zend_prop_purpose purpose)1904 ZEND_API HashTable *zend_get_properties_for(zval *obj, zend_prop_purpose purpose) {
1905 if (Z_OBJ_HT_P(obj)->get_properties_for) {
1906 return Z_OBJ_HT_P(obj)->get_properties_for(obj, purpose);
1907 }
1908
1909 return zend_std_get_properties_for(obj, purpose);
1910 }
1911
1912 ZEND_API const zend_object_handlers std_object_handlers = {
1913 0, /* offset */
1914
1915 zend_object_std_dtor, /* free_obj */
1916 zend_objects_destroy_object, /* dtor_obj */
1917 zend_objects_clone_obj, /* clone_obj */
1918
1919 zend_std_read_property, /* read_property */
1920 zend_std_write_property, /* write_property */
1921 zend_std_read_dimension, /* read_dimension */
1922 zend_std_write_dimension, /* write_dimension */
1923 zend_std_get_property_ptr_ptr, /* get_property_ptr_ptr */
1924 NULL, /* get */
1925 NULL, /* set */
1926 zend_std_has_property, /* has_property */
1927 zend_std_unset_property, /* unset_property */
1928 zend_std_has_dimension, /* has_dimension */
1929 zend_std_unset_dimension, /* unset_dimension */
1930 zend_std_get_properties, /* get_properties */
1931 zend_std_get_method, /* get_method */
1932 NULL, /* call_method */
1933 zend_std_get_constructor, /* get_constructor */
1934 zend_std_get_class_name, /* get_class_name */
1935 zend_std_compare_objects, /* compare_objects */
1936 zend_std_cast_object_tostring, /* cast_object */
1937 NULL, /* count_elements */
1938 zend_std_get_debug_info, /* get_debug_info */
1939 zend_std_get_closure, /* get_closure */
1940 zend_std_get_gc, /* get_gc */
1941 NULL, /* do_operation */
1942 NULL, /* compare */
1943 NULL, /* get_properties_for */
1944 };
1945