1 /*
2 +----------------------------------------------------------------------+
3 | Zend Engine |
4 +----------------------------------------------------------------------+
5 | Copyright (c) 1998-2017 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@zend.com> |
16 | Zeev Suraski <zeev@zend.com> |
17 | Dmitry Stogov <dmitry@zend.com> |
18 +----------------------------------------------------------------------+
19 */
20
21 /* $Id$ */
22
23 #include <stdio.h>
24 #include <signal.h>
25
26 #include "zend.h"
27 #include "zend_compile.h"
28 #include "zend_execute.h"
29 #include "zend_API.h"
30 #include "zend_stack.h"
31 #include "zend_constants.h"
32 #include "zend_extensions.h"
33 #include "zend_exceptions.h"
34 #include "zend_closures.h"
35 #include "zend_generators.h"
36 #include "zend_vm.h"
37 #include "zend_float.h"
38 #ifdef HAVE_SYS_TIME_H
39 #include <sys/time.h>
40 #endif
41
42 ZEND_API void (*zend_execute_ex)(zend_execute_data *execute_data);
43 ZEND_API void (*zend_execute_internal)(zend_execute_data *execute_data, zval *return_value);
44
45 /* true globals */
46 ZEND_API const zend_fcall_info empty_fcall_info = { 0, NULL, {{0}, {{0}}, {0}}, NULL, NULL, NULL, NULL, 0, 0 };
47 ZEND_API const zend_fcall_info_cache empty_fcall_info_cache = { 0, NULL, NULL, NULL, NULL };
48
49 #ifdef ZEND_WIN32
50 ZEND_TLS HANDLE tq_timer = NULL;
51 #endif
52
53 #if 0&&ZEND_DEBUG
54 static void (*original_sigsegv_handler)(int);
55 static void zend_handle_sigsegv(int dummy) /* {{{ */
56 {
57 fflush(stdout);
58 fflush(stderr);
59 if (original_sigsegv_handler == zend_handle_sigsegv) {
60 signal(SIGSEGV, original_sigsegv_handler);
61 } else {
62 signal(SIGSEGV, SIG_DFL);
63 }
64 {
65
66 fprintf(stderr, "SIGSEGV caught on opcode %d on opline %d of %s() at %s:%d\n\n",
67 active_opline->opcode,
68 active_opline-EG(active_op_array)->opcodes,
69 get_active_function_name(),
70 zend_get_executed_filename(),
71 zend_get_executed_lineno());
72 /* See http://support.microsoft.com/kb/190351 */
73 #ifdef ZEND_WIN32
74 fflush(stderr);
75 #endif
76 }
77 if (original_sigsegv_handler!=zend_handle_sigsegv) {
78 original_sigsegv_handler(dummy);
79 }
80 }
81 /* }}} */
82 #endif
83
zend_extension_activator(zend_extension * extension)84 static void zend_extension_activator(zend_extension *extension) /* {{{ */
85 {
86 if (extension->activate) {
87 extension->activate();
88 }
89 }
90 /* }}} */
91
zend_extension_deactivator(zend_extension * extension)92 static void zend_extension_deactivator(zend_extension *extension) /* {{{ */
93 {
94 if (extension->deactivate) {
95 extension->deactivate();
96 }
97 }
98 /* }}} */
99
clean_non_persistent_function(zval * zv)100 static int clean_non_persistent_function(zval *zv) /* {{{ */
101 {
102 zend_function *function = Z_PTR_P(zv);
103 return (function->type == ZEND_INTERNAL_FUNCTION) ? ZEND_HASH_APPLY_STOP : ZEND_HASH_APPLY_REMOVE;
104 }
105 /* }}} */
106
clean_non_persistent_function_full(zval * zv)107 ZEND_API int clean_non_persistent_function_full(zval *zv) /* {{{ */
108 {
109 zend_function *function = Z_PTR_P(zv);
110 return (function->type == ZEND_INTERNAL_FUNCTION) ? ZEND_HASH_APPLY_KEEP : ZEND_HASH_APPLY_REMOVE;
111 }
112 /* }}} */
113
clean_non_persistent_class(zval * zv)114 static int clean_non_persistent_class(zval *zv) /* {{{ */
115 {
116 zend_class_entry *ce = Z_PTR_P(zv);
117 return (ce->type == ZEND_INTERNAL_CLASS) ? ZEND_HASH_APPLY_STOP : ZEND_HASH_APPLY_REMOVE;
118 }
119 /* }}} */
120
clean_non_persistent_class_full(zval * zv)121 ZEND_API int clean_non_persistent_class_full(zval *zv) /* {{{ */
122 {
123 zend_class_entry *ce = Z_PTR_P(zv);
124 return (ce->type == ZEND_INTERNAL_CLASS) ? ZEND_HASH_APPLY_KEEP : ZEND_HASH_APPLY_REMOVE;
125 }
126 /* }}} */
127
init_executor(void)128 void init_executor(void) /* {{{ */
129 {
130 zend_init_fpu();
131
132 ZVAL_NULL(&EG(uninitialized_zval));
133 ZVAL_NULL(&EG(error_zval));
134 /* destroys stack frame, therefore makes core dumps worthless */
135 #if 0&&ZEND_DEBUG
136 original_sigsegv_handler = signal(SIGSEGV, zend_handle_sigsegv);
137 #endif
138
139 EG(symtable_cache_ptr) = EG(symtable_cache) - 1;
140 EG(symtable_cache_limit) = EG(symtable_cache) + SYMTABLE_CACHE_SIZE - 1;
141 EG(no_extensions) = 0;
142
143 EG(function_table) = CG(function_table);
144 EG(class_table) = CG(class_table);
145
146 EG(in_autoload) = NULL;
147 EG(autoload_func) = NULL;
148 EG(error_handling) = EH_NORMAL;
149
150 zend_vm_stack_init();
151
152 zend_hash_init(&EG(symbol_table), 64, NULL, ZVAL_PTR_DTOR, 0);
153 EG(valid_symbol_table) = 1;
154
155 zend_llist_apply(&zend_extensions, (llist_apply_func_t) zend_extension_activator);
156
157 zend_hash_init(&EG(included_files), 8, NULL, NULL, 0);
158
159 EG(ticks_count) = 0;
160
161 ZVAL_UNDEF(&EG(user_error_handler));
162
163 EG(current_execute_data) = NULL;
164
165 zend_stack_init(&EG(user_error_handlers_error_reporting), sizeof(int));
166 zend_stack_init(&EG(user_error_handlers), sizeof(zval));
167 zend_stack_init(&EG(user_exception_handlers), sizeof(zval));
168
169 zend_objects_store_init(&EG(objects_store), 1024);
170
171 EG(full_tables_cleanup) = 0;
172 #ifdef ZEND_WIN32
173 EG(timed_out) = 0;
174 #endif
175
176 EG(exception) = NULL;
177 EG(prev_exception) = NULL;
178
179 EG(scope) = NULL;
180
181 EG(ht_iterators_count) = sizeof(EG(ht_iterators_slots)) / sizeof(HashTableIterator);
182 EG(ht_iterators_used) = 0;
183 EG(ht_iterators) = EG(ht_iterators_slots);
184 memset(EG(ht_iterators), 0, sizeof(EG(ht_iterators_slots)));
185
186 EG(active) = 1;
187 }
188 /* }}} */
189
zval_call_destructor(zval * zv)190 static int zval_call_destructor(zval *zv) /* {{{ */
191 {
192 if (Z_TYPE_P(zv) == IS_INDIRECT) {
193 zv = Z_INDIRECT_P(zv);
194 }
195 if (Z_TYPE_P(zv) == IS_OBJECT && Z_REFCOUNT_P(zv) == 1) {
196 return ZEND_HASH_APPLY_REMOVE;
197 } else {
198 return ZEND_HASH_APPLY_KEEP;
199 }
200 }
201 /* }}} */
202
zend_unclean_zval_ptr_dtor(zval * zv)203 static void zend_unclean_zval_ptr_dtor(zval *zv) /* {{{ */
204 {
205 if (Z_TYPE_P(zv) == IS_INDIRECT) {
206 zv = Z_INDIRECT_P(zv);
207 }
208 i_zval_ptr_dtor(zv ZEND_FILE_LINE_CC);
209 }
210 /* }}} */
211
zend_throw_or_error(int fetch_type,zend_class_entry * exception_ce,const char * format,...)212 static void zend_throw_or_error(int fetch_type, zend_class_entry *exception_ce, const char *format, ...) /* {{{ */
213 {
214 va_list va;
215 char *message = NULL;
216
217 va_start(va, format);
218 zend_vspprintf(&message, 0, format, va);
219
220 if (fetch_type & ZEND_FETCH_CLASS_EXCEPTION) {
221 zend_throw_error(exception_ce, "%s", message);
222 } else {
223 zend_error(E_ERROR, "%s", message);
224 }
225
226 efree(message);
227 va_end(va);
228 }
229 /* }}} */
230
shutdown_destructors(void)231 void shutdown_destructors(void) /* {{{ */
232 {
233 if (CG(unclean_shutdown)) {
234 EG(symbol_table).pDestructor = zend_unclean_zval_ptr_dtor;
235 }
236 zend_try {
237 uint32_t symbols;
238 do {
239 symbols = zend_hash_num_elements(&EG(symbol_table));
240 zend_hash_reverse_apply(&EG(symbol_table), (apply_func_t) zval_call_destructor);
241 } while (symbols != zend_hash_num_elements(&EG(symbol_table)));
242 zend_objects_store_call_destructors(&EG(objects_store));
243 } zend_catch {
244 /* if we couldn't destruct cleanly, mark all objects as destructed anyway */
245 zend_objects_store_mark_destructed(&EG(objects_store));
246 } zend_end_try();
247 }
248 /* }}} */
249
shutdown_executor(void)250 void shutdown_executor(void) /* {{{ */
251 {
252 zend_function *func;
253 zend_class_entry *ce;
254
255 zend_try {
256
257 /* Removed because this can not be safely done, e.g. in this situation:
258 Object 1 creates object 2
259 Object 3 holds reference to object 2.
260 Now when 1 and 2 are destroyed, 3 can still access 2 in its destructor, with
261 very problematic results */
262 /* zend_objects_store_call_destructors(&EG(objects_store)); */
263
264 /* Moved after symbol table cleaners, because some of the cleaners can call
265 destructors, which would use EG(symtable_cache_ptr) and thus leave leaks */
266 /* while (EG(symtable_cache_ptr)>=EG(symtable_cache)) {
267 zend_hash_destroy(*EG(symtable_cache_ptr));
268 efree(*EG(symtable_cache_ptr));
269 EG(symtable_cache_ptr)--;
270 }
271 */
272 zend_llist_apply(&zend_extensions, (llist_apply_func_t) zend_extension_deactivator);
273
274 if (CG(unclean_shutdown)) {
275 EG(symbol_table).pDestructor = zend_unclean_zval_ptr_dtor;
276 }
277 zend_hash_graceful_reverse_destroy(&EG(symbol_table));
278 } zend_end_try();
279 EG(valid_symbol_table) = 0;
280
281 zend_try {
282 zval *zeh;
283 /* remove error handlers before destroying classes and functions,
284 * so that if handler used some class, crash would not happen */
285 if (Z_TYPE(EG(user_error_handler)) != IS_UNDEF) {
286 zeh = &EG(user_error_handler);
287 zval_ptr_dtor(zeh);
288 ZVAL_UNDEF(&EG(user_error_handler));
289 }
290
291 if (Z_TYPE(EG(user_exception_handler)) != IS_UNDEF) {
292 zeh = &EG(user_exception_handler);
293 zval_ptr_dtor(zeh);
294 ZVAL_UNDEF(&EG(user_exception_handler));
295 }
296
297 zend_stack_clean(&EG(user_error_handlers_error_reporting), NULL, 1);
298 zend_stack_clean(&EG(user_error_handlers), (void (*)(void *))ZVAL_PTR_DTOR, 1);
299 zend_stack_clean(&EG(user_exception_handlers), (void (*)(void *))ZVAL_PTR_DTOR, 1);
300 } zend_end_try();
301
302 zend_try {
303 /* Cleanup static data for functions and arrays.
304 * We need a separate cleanup stage because of the following problem:
305 * Suppose we destroy class X, which destroys the class's function table,
306 * and in the function table we have function foo() that has static $bar.
307 * Now if an object of class X is assigned to $bar, its destructor will be
308 * called and will fail since X's function table is in mid-destruction.
309 * So we want first of all to clean up all data and then move to tables destruction.
310 * Note that only run-time accessed data need to be cleaned up, pre-defined data can
311 * not contain objects and thus are not probelmatic */
312 if (EG(full_tables_cleanup)) {
313 ZEND_HASH_FOREACH_PTR(EG(function_table), func) {
314 if (func->type == ZEND_USER_FUNCTION) {
315 zend_cleanup_op_array_data((zend_op_array *) func);
316 }
317 } ZEND_HASH_FOREACH_END();
318 ZEND_HASH_REVERSE_FOREACH_PTR(EG(class_table), ce) {
319 if (ce->type == ZEND_USER_CLASS) {
320 zend_cleanup_user_class_data(ce);
321 } else {
322 zend_cleanup_internal_class_data(ce);
323 }
324 } ZEND_HASH_FOREACH_END();
325 } else {
326 ZEND_HASH_REVERSE_FOREACH_PTR(EG(function_table), func) {
327 if (func->type != ZEND_USER_FUNCTION) {
328 break;
329 }
330 zend_cleanup_op_array_data((zend_op_array *) func);
331 } ZEND_HASH_FOREACH_END();
332 ZEND_HASH_REVERSE_FOREACH_PTR(EG(class_table), ce) {
333 if (ce->type != ZEND_USER_CLASS) {
334 break;
335 }
336 zend_cleanup_user_class_data(ce);
337 } ZEND_HASH_FOREACH_END();
338 zend_cleanup_internal_classes();
339 }
340 } zend_end_try();
341
342 zend_try {
343 zend_llist_destroy(&CG(open_files));
344 } zend_end_try();
345
346 zend_try {
347 clean_non_persistent_constants();
348 } zend_end_try();
349
350 zend_try {
351 zend_close_rsrc_list(&EG(regular_list));
352 } zend_end_try();
353
354 #if ZEND_DEBUG
355 if (GC_G(gc_enabled) && !CG(unclean_shutdown)) {
356 gc_collect_cycles();
357 }
358 #endif
359
360 zend_try {
361 zend_objects_store_free_object_storage(&EG(objects_store));
362
363 zend_vm_stack_destroy();
364
365 /* Destroy all op arrays */
366 if (EG(full_tables_cleanup)) {
367 zend_hash_reverse_apply(EG(function_table), clean_non_persistent_function_full);
368 zend_hash_reverse_apply(EG(class_table), clean_non_persistent_class_full);
369 } else {
370 zend_hash_reverse_apply(EG(function_table), clean_non_persistent_function);
371 zend_hash_reverse_apply(EG(class_table), clean_non_persistent_class);
372 }
373
374 while (EG(symtable_cache_ptr)>=EG(symtable_cache)) {
375 zend_hash_destroy(*EG(symtable_cache_ptr));
376 FREE_HASHTABLE(*EG(symtable_cache_ptr));
377 EG(symtable_cache_ptr)--;
378 }
379 } zend_end_try();
380
381 zend_try {
382 #if 0&&ZEND_DEBUG
383 signal(SIGSEGV, original_sigsegv_handler);
384 #endif
385
386 zend_hash_destroy(&EG(included_files));
387
388 zend_stack_destroy(&EG(user_error_handlers_error_reporting));
389 zend_stack_destroy(&EG(user_error_handlers));
390 zend_stack_destroy(&EG(user_exception_handlers));
391 zend_objects_store_destroy(&EG(objects_store));
392 if (EG(in_autoload)) {
393 zend_hash_destroy(EG(in_autoload));
394 FREE_HASHTABLE(EG(in_autoload));
395 }
396 } zend_end_try();
397
398 zend_shutdown_fpu();
399
400 #if ZEND_DEBUG
401 if (EG(ht_iterators_used) && !CG(unclean_shutdown)) {
402 zend_error(E_WARNING, "Leaked %" PRIu32 " hashtable iterators", EG(ht_iterators_used));
403 }
404 #endif
405
406 EG(ht_iterators_used) = 0;
407 if (EG(ht_iterators) != EG(ht_iterators_slots)) {
408 efree(EG(ht_iterators));
409 }
410
411 EG(active) = 0;
412 }
413 /* }}} */
414
415 /* return class name and "::" or "". */
get_active_class_name(const char ** space)416 ZEND_API const char *get_active_class_name(const char **space) /* {{{ */
417 {
418 zend_function *func;
419
420 if (!zend_is_executing()) {
421 if (space) {
422 *space = "";
423 }
424 return "";
425 }
426
427 func = EG(current_execute_data)->func;
428 switch (func->type) {
429 case ZEND_USER_FUNCTION:
430 case ZEND_INTERNAL_FUNCTION:
431 {
432 zend_class_entry *ce = func->common.scope;
433
434 if (space) {
435 *space = ce ? "::" : "";
436 }
437 return ce ? ZSTR_VAL(ce->name) : "";
438 }
439 default:
440 if (space) {
441 *space = "";
442 }
443 return "";
444 }
445 }
446 /* }}} */
447
get_active_function_name(void)448 ZEND_API const char *get_active_function_name(void) /* {{{ */
449 {
450 zend_function *func;
451
452 if (!zend_is_executing()) {
453 return NULL;
454 }
455 func = EG(current_execute_data)->func;
456 switch (func->type) {
457 case ZEND_USER_FUNCTION: {
458 zend_string *function_name = func->common.function_name;
459
460 if (function_name) {
461 return ZSTR_VAL(function_name);
462 } else {
463 return "main";
464 }
465 }
466 break;
467 case ZEND_INTERNAL_FUNCTION:
468 return ZSTR_VAL(func->common.function_name);
469 break;
470 default:
471 return NULL;
472 }
473 }
474 /* }}} */
475
zend_get_executed_filename(void)476 ZEND_API const char *zend_get_executed_filename(void) /* {{{ */
477 {
478 zend_execute_data *ex = EG(current_execute_data);
479
480 while (ex && (!ex->func || !ZEND_USER_CODE(ex->func->type))) {
481 ex = ex->prev_execute_data;
482 }
483 if (ex) {
484 return ZSTR_VAL(ex->func->op_array.filename);
485 } else {
486 return "[no active file]";
487 }
488 }
489 /* }}} */
490
zend_get_executed_filename_ex(void)491 ZEND_API zend_string *zend_get_executed_filename_ex(void) /* {{{ */
492 {
493 zend_execute_data *ex = EG(current_execute_data);
494
495 while (ex && (!ex->func || !ZEND_USER_CODE(ex->func->type))) {
496 ex = ex->prev_execute_data;
497 }
498 if (ex) {
499 return ex->func->op_array.filename;
500 } else {
501 return NULL;
502 }
503 }
504 /* }}} */
505
zend_get_executed_lineno(void)506 ZEND_API uint zend_get_executed_lineno(void) /* {{{ */
507 {
508 zend_execute_data *ex = EG(current_execute_data);
509
510 while (ex && (!ex->func || !ZEND_USER_CODE(ex->func->type))) {
511 ex = ex->prev_execute_data;
512 }
513 if (ex) {
514 if (EG(exception) && ex->opline->opcode == ZEND_HANDLE_EXCEPTION &&
515 ex->opline->lineno == 0 && EG(opline_before_exception)) {
516 return EG(opline_before_exception)->lineno;
517 }
518 return ex->opline->lineno;
519 } else {
520 return 0;
521 }
522 }
523 /* }}} */
524
zend_is_executing(void)525 ZEND_API zend_bool zend_is_executing(void) /* {{{ */
526 {
527 return EG(current_execute_data) != 0;
528 }
529 /* }}} */
530
_zval_ptr_dtor(zval * zval_ptr ZEND_FILE_LINE_DC)531 ZEND_API void _zval_ptr_dtor(zval *zval_ptr ZEND_FILE_LINE_DC) /* {{{ */
532 {
533 i_zval_ptr_dtor(zval_ptr ZEND_FILE_LINE_RELAY_CC);
534 }
535 /* }}} */
536
_zval_internal_ptr_dtor(zval * zval_ptr ZEND_FILE_LINE_DC)537 ZEND_API void _zval_internal_ptr_dtor(zval *zval_ptr ZEND_FILE_LINE_DC) /* {{{ */
538 {
539 if (Z_REFCOUNTED_P(zval_ptr)) {
540 Z_DELREF_P(zval_ptr);
541 if (Z_REFCOUNT_P(zval_ptr) == 0) {
542 _zval_internal_dtor_for_ptr(zval_ptr ZEND_FILE_LINE_CC);
543 }
544 }
545 }
546 /* }}} */
547
548 #define IS_VISITED_CONSTANT 0x80
549 #define IS_CONSTANT_VISITED(p) (Z_TYPE_P(p) & IS_VISITED_CONSTANT)
550 #define MARK_CONSTANT_VISITED(p) Z_TYPE_INFO_P(p) |= IS_VISITED_CONSTANT
551 #define RESET_CONSTANT_VISITED(p) Z_TYPE_INFO_P(p) &= ~IS_VISITED_CONSTANT
552
zval_update_constant_ex(zval * p,zend_bool inline_change,zend_class_entry * scope)553 ZEND_API int zval_update_constant_ex(zval *p, zend_bool inline_change, zend_class_entry *scope) /* {{{ */
554 {
555 zval *const_value;
556 char *colon;
557
558 if (IS_CONSTANT_VISITED(p)) {
559 zend_throw_error(NULL, "Cannot declare self-referencing constant '%s'", Z_STRVAL_P(p));
560 return FAILURE;
561 } else if (Z_TYPE_P(p) == IS_CONSTANT) {
562
563 SEPARATE_ZVAL_NOREF(p);
564 MARK_CONSTANT_VISITED(p);
565 if (Z_CONST_FLAGS_P(p) & IS_CONSTANT_CLASS) {
566 ZEND_ASSERT(EG(current_execute_data));
567 if (inline_change) {
568 zend_string_release(Z_STR_P(p));
569 }
570 if (EG(scope) && EG(scope)->name) {
571 ZVAL_STR_COPY(p, EG(scope)->name);
572 } else {
573 ZVAL_EMPTY_STRING(p);
574 }
575 } else if (UNEXPECTED((const_value = zend_get_constant_ex(Z_STR_P(p), scope, Z_CONST_FLAGS_P(p))) == NULL)) {
576 if (UNEXPECTED(EG(exception))) {
577 RESET_CONSTANT_VISITED(p);
578 return FAILURE;
579 } else if ((colon = (char*)zend_memrchr(Z_STRVAL_P(p), ':', Z_STRLEN_P(p)))) {
580 zend_throw_error(NULL, "Undefined class constant '%s'", Z_STRVAL_P(p));
581 RESET_CONSTANT_VISITED(p);
582 return FAILURE;
583 } else {
584 zend_string *save = Z_STR_P(p);
585 if ((Z_CONST_FLAGS_P(p) & IS_CONSTANT_UNQUALIFIED) == 0) {
586 if (ZSTR_VAL(save)[0] == '\\') {
587 zend_throw_error(NULL, "Undefined constant '%s'", ZSTR_VAL(save) + 1);
588 } else {
589 zend_throw_error(NULL, "Undefined constant '%s'", ZSTR_VAL(save));
590 }
591 RESET_CONSTANT_VISITED(p);
592 return FAILURE;
593 } else {
594 char *actual = Z_STRVAL_P(p);
595 size_t actual_len = Z_STRLEN_P(p);
596 char *slash = (char *) zend_memrchr(actual, '\\', actual_len);
597 if (slash) {
598 actual = slash + 1;
599 actual_len -= (actual - Z_STRVAL_P(p));
600 }
601
602 zend_error(E_NOTICE, "Use of undefined constant %s - assumed '%s'", actual, actual);
603 if (EG(exception)) {
604 RESET_CONSTANT_VISITED(p);
605 return FAILURE;
606 }
607
608 if (!inline_change) {
609 ZVAL_STRINGL(p, actual, actual_len);
610 } else {
611 if (slash) {
612 ZVAL_STRINGL(p, actual, actual_len);
613 zend_string_release(save);
614 } else {
615 Z_TYPE_INFO_P(p) = Z_REFCOUNTED_P(p) ?
616 IS_STRING_EX : IS_INTERNED_STRING_EX;
617 }
618 }
619 }
620 }
621 } else {
622 if (inline_change) {
623 zend_string_release(Z_STR_P(p));
624 }
625 ZVAL_COPY_VALUE(p, const_value);
626 if (Z_OPT_CONSTANT_P(p)) {
627 if (UNEXPECTED(zval_update_constant_ex(p, 1, NULL) != SUCCESS)) {
628 RESET_CONSTANT_VISITED(p);
629 return FAILURE;
630 }
631 }
632 zval_opt_copy_ctor(p);
633 }
634 } else if (Z_TYPE_P(p) == IS_CONSTANT_AST) {
635 zval tmp;
636
637 if (UNEXPECTED(zend_ast_evaluate(&tmp, Z_ASTVAL_P(p), scope) != SUCCESS)) {
638 return FAILURE;
639 }
640 if (inline_change) {
641 zval_ptr_dtor(p);
642 }
643 ZVAL_COPY_VALUE(p, &tmp);
644 }
645 return SUCCESS;
646 }
647 /* }}} */
648
zval_update_constant(zval * pp,zend_bool inline_change)649 ZEND_API int zval_update_constant(zval *pp, zend_bool inline_change) /* {{{ */
650 {
651 return zval_update_constant_ex(pp, inline_change, NULL);
652 }
653 /* }}} */
654
call_user_function(HashTable * function_table,zval * object,zval * function_name,zval * retval_ptr,uint32_t param_count,zval params[])655 int call_user_function(HashTable *function_table, zval *object, zval *function_name, zval *retval_ptr, uint32_t param_count, zval params[]) /* {{{ */
656 {
657 return call_user_function_ex(function_table, object, function_name, retval_ptr, param_count, params, 1, NULL);
658 }
659 /* }}} */
660
call_user_function_ex(HashTable * function_table,zval * object,zval * function_name,zval * retval_ptr,uint32_t param_count,zval params[],int no_separation,zend_array * symbol_table)661 int call_user_function_ex(HashTable *function_table, zval *object, zval *function_name, zval *retval_ptr, uint32_t param_count, zval params[], int no_separation, zend_array *symbol_table) /* {{{ */
662 {
663 zend_fcall_info fci;
664
665 fci.size = sizeof(fci);
666 fci.function_table = function_table;
667 fci.object = object ? Z_OBJ_P(object) : NULL;
668 ZVAL_COPY_VALUE(&fci.function_name, function_name);
669 fci.retval = retval_ptr;
670 fci.param_count = param_count;
671 fci.params = params;
672 fci.no_separation = (zend_bool) no_separation;
673 fci.symbol_table = symbol_table;
674
675 return zend_call_function(&fci, NULL);
676 }
677 /* }}} */
678
zend_call_function(zend_fcall_info * fci,zend_fcall_info_cache * fci_cache)679 int zend_call_function(zend_fcall_info *fci, zend_fcall_info_cache *fci_cache) /* {{{ */
680 {
681 uint32_t i;
682 zend_class_entry *calling_scope = NULL;
683 zend_execute_data *call, dummy_execute_data;
684 zend_fcall_info_cache fci_cache_local;
685 zend_function *func;
686 zend_class_entry *orig_scope;
687
688 ZVAL_UNDEF(fci->retval);
689
690 if (!EG(active)) {
691 return FAILURE; /* executor is already inactive */
692 }
693
694 if (EG(exception)) {
695 return FAILURE; /* we would result in an instable executor otherwise */
696 }
697
698 switch (fci->size) {
699 case sizeof(zend_fcall_info):
700 break; /* nothing to do currently */
701 default:
702 zend_error_noreturn(E_CORE_ERROR, "Corrupted fcall_info provided to zend_call_function()");
703 break;
704 }
705
706 orig_scope = EG(scope);
707
708 /* Initialize execute_data */
709 if (!EG(current_execute_data)) {
710 /* This only happens when we're called outside any execute()'s
711 * It shouldn't be strictly necessary to NULL execute_data out,
712 * but it may make bugs easier to spot
713 */
714 memset(&dummy_execute_data, 0, sizeof(zend_execute_data));
715 EG(current_execute_data) = &dummy_execute_data;
716 } else if (EG(current_execute_data)->func &&
717 ZEND_USER_CODE(EG(current_execute_data)->func->common.type) &&
718 EG(current_execute_data)->opline->opcode != ZEND_DO_FCALL &&
719 EG(current_execute_data)->opline->opcode != ZEND_DO_ICALL &&
720 EG(current_execute_data)->opline->opcode != ZEND_DO_UCALL &&
721 EG(current_execute_data)->opline->opcode != ZEND_DO_FCALL_BY_NAME) {
722 /* Insert fake frame in case of include or magic calls */
723 dummy_execute_data = *EG(current_execute_data);
724 dummy_execute_data.prev_execute_data = EG(current_execute_data);
725 dummy_execute_data.call = NULL;
726 dummy_execute_data.opline = NULL;
727 dummy_execute_data.func = NULL;
728 EG(current_execute_data) = &dummy_execute_data;
729 }
730
731 if (!fci_cache || !fci_cache->initialized) {
732 zend_string *callable_name;
733 char *error = NULL;
734
735 if (!fci_cache) {
736 fci_cache = &fci_cache_local;
737 }
738
739 if (!zend_is_callable_ex(&fci->function_name, fci->object, IS_CALLABLE_CHECK_SILENT, &callable_name, fci_cache, &error)) {
740 if (error) {
741 zend_error(E_WARNING, "Invalid callback %s, %s", ZSTR_VAL(callable_name), error);
742 efree(error);
743 }
744 if (callable_name) {
745 zend_string_release(callable_name);
746 }
747 if (EG(current_execute_data) == &dummy_execute_data) {
748 EG(current_execute_data) = dummy_execute_data.prev_execute_data;
749 }
750 return FAILURE;
751 } else if (error) {
752 /* Capitalize the first latter of the error message */
753 if (error[0] >= 'a' && error[0] <= 'z') {
754 error[0] += ('A' - 'a');
755 }
756 zend_error(E_DEPRECATED, "%s", error);
757 efree(error);
758 if (UNEXPECTED(EG(exception))) {
759 if (callable_name) {
760 zend_string_release(callable_name);
761 }
762 if (EG(current_execute_data) == &dummy_execute_data) {
763 EG(current_execute_data) = dummy_execute_data.prev_execute_data;
764 }
765 return FAILURE;
766 }
767 }
768 zend_string_release(callable_name);
769 }
770
771 func = fci_cache->function_handler;
772 call = zend_vm_stack_push_call_frame(ZEND_CALL_TOP_FUNCTION,
773 func, fci->param_count, fci_cache->called_scope, fci_cache->object);
774 calling_scope = fci_cache->calling_scope;
775 fci->object = fci_cache->object;
776 if (fci->object &&
777 (!EG(objects_store).object_buckets ||
778 !IS_OBJ_VALID(EG(objects_store).object_buckets[fci->object->handle]))) {
779 if (EG(current_execute_data) == &dummy_execute_data) {
780 EG(current_execute_data) = dummy_execute_data.prev_execute_data;
781 }
782 return FAILURE;
783 }
784
785 if (func->common.fn_flags & (ZEND_ACC_ABSTRACT|ZEND_ACC_DEPRECATED)) {
786 if (func->common.fn_flags & ZEND_ACC_ABSTRACT) {
787 zend_throw_error(NULL, "Cannot call abstract method %s::%s()", ZSTR_VAL(func->common.scope->name), ZSTR_VAL(func->common.function_name));
788 if (EG(current_execute_data) == &dummy_execute_data) {
789 EG(current_execute_data) = dummy_execute_data.prev_execute_data;
790 }
791 return FAILURE;
792 }
793 if (func->common.fn_flags & ZEND_ACC_DEPRECATED) {
794 zend_error(E_DEPRECATED, "Function %s%s%s() is deprecated",
795 func->common.scope ? ZSTR_VAL(func->common.scope->name) : "",
796 func->common.scope ? "::" : "",
797 ZSTR_VAL(func->common.function_name));
798 }
799 }
800
801 for (i=0; i<fci->param_count; i++) {
802 zval *param;
803 zval *arg = &fci->params[i];
804
805 if (ARG_SHOULD_BE_SENT_BY_REF(func, i + 1)) {
806 if (UNEXPECTED(!Z_ISREF_P(arg))) {
807 if (fci->no_separation &&
808 !ARG_MAY_BE_SENT_BY_REF(func, i + 1)) {
809 if (i) {
810 /* hack to clean up the stack */
811 ZEND_CALL_NUM_ARGS(call) = i;
812 zend_vm_stack_free_args(call);
813 }
814 zend_vm_stack_free_call_frame(call);
815
816 zend_error(E_WARNING, "Parameter %d to %s%s%s() expected to be a reference, value given",
817 i+1,
818 func->common.scope ? ZSTR_VAL(func->common.scope->name) : "",
819 func->common.scope ? "::" : "",
820 ZSTR_VAL(func->common.function_name));
821 if (EG(current_execute_data) == &dummy_execute_data) {
822 EG(current_execute_data) = dummy_execute_data.prev_execute_data;
823 }
824 return FAILURE;
825 }
826
827 ZVAL_NEW_REF(arg, arg);
828 }
829 Z_ADDREF_P(arg);
830 } else {
831 if (Z_ISREF_P(arg) &&
832 !(func->common.fn_flags & ZEND_ACC_CALL_VIA_TRAMPOLINE)) {
833 /* don't separate references for __call */
834 arg = Z_REFVAL_P(arg);
835 }
836 if (Z_OPT_REFCOUNTED_P(arg)) {
837 Z_ADDREF_P(arg);
838 }
839 }
840 param = ZEND_CALL_ARG(call, i+1);
841 ZVAL_COPY_VALUE(param, arg);
842 }
843
844 EG(scope) = calling_scope;
845 if (func->common.fn_flags & ZEND_ACC_STATIC) {
846 fci->object = NULL;
847 }
848 Z_OBJ(call->This) = fci->object;
849
850 if (UNEXPECTED(func->op_array.fn_flags & ZEND_ACC_CLOSURE)) {
851 ZEND_ASSERT(GC_TYPE((zend_object*)func->op_array.prototype) == IS_OBJECT);
852 GC_REFCOUNT((zend_object*)func->op_array.prototype)++;
853 ZEND_ADD_CALL_FLAG(call, ZEND_CALL_CLOSURE);
854 }
855
856 /* PHP-7 doesn't support symbol_table substitution for functions */
857 ZEND_ASSERT(fci->symbol_table == NULL);
858
859 if (func->type == ZEND_USER_FUNCTION) {
860 int call_via_handler = (func->common.fn_flags & ZEND_ACC_CALL_VIA_TRAMPOLINE) != 0;
861 EG(scope) = func->common.scope;
862 call->symbol_table = fci->symbol_table;
863 if (EXPECTED((func->op_array.fn_flags & ZEND_ACC_GENERATOR) == 0)) {
864 const zend_op *current_opline_before_exception = EG(opline_before_exception);
865
866 zend_init_execute_data(call, &func->op_array, fci->retval);
867 zend_execute_ex(call);
868 EG(opline_before_exception) = current_opline_before_exception;
869 } else {
870 zend_generator_create_zval(call, &func->op_array, fci->retval);
871 }
872 if (call_via_handler) {
873 /* We must re-initialize function again */
874 fci_cache->initialized = 0;
875 }
876 } else if (func->type == ZEND_INTERNAL_FUNCTION) {
877 int call_via_handler = (func->common.fn_flags & ZEND_ACC_CALL_VIA_TRAMPOLINE) != 0;
878 ZVAL_NULL(fci->retval);
879 if (func->common.scope) {
880 EG(scope) = func->common.scope;
881 }
882 call->prev_execute_data = EG(current_execute_data);
883 call->return_value = NULL; /* this is not a constructor call */
884 EG(current_execute_data) = call;
885 if (EXPECTED(zend_execute_internal == NULL)) {
886 /* saves one function call if zend_execute_internal is not used */
887 func->internal_function.handler(call, fci->retval);
888 } else {
889 zend_execute_internal(call, fci->retval);
890 }
891 EG(current_execute_data) = call->prev_execute_data;
892 zend_vm_stack_free_args(call);
893
894 /* We shouldn't fix bad extensions here,
895 because it can break proper ones (Bug #34045)
896 if (!EX(function_state).function->common.return_reference)
897 {
898 INIT_PZVAL(f->retval);
899 }*/
900 if (EG(exception)) {
901 zval_ptr_dtor(fci->retval);
902 ZVAL_UNDEF(fci->retval);
903 }
904
905 if (call_via_handler) {
906 /* We must re-initialize function again */
907 fci_cache->initialized = 0;
908 }
909 } else { /* ZEND_OVERLOADED_FUNCTION */
910 ZVAL_NULL(fci->retval);
911
912 /* Not sure what should be done here if it's a static method */
913 if (fci->object) {
914 call->prev_execute_data = EG(current_execute_data);
915 EG(current_execute_data) = call;
916 fci->object->handlers->call_method(func->common.function_name, fci->object, call, fci->retval);
917 EG(current_execute_data) = call->prev_execute_data;
918 } else {
919 zend_throw_error(NULL, "Cannot call overloaded function for non-object");
920 }
921
922 zend_vm_stack_free_args(call);
923
924 if (func->type == ZEND_OVERLOADED_FUNCTION_TEMPORARY) {
925 zend_string_release(func->common.function_name);
926 }
927 efree(func);
928
929 if (EG(exception)) {
930 zval_ptr_dtor(fci->retval);
931 ZVAL_UNDEF(fci->retval);
932 }
933 }
934
935 EG(scope) = orig_scope;
936 zend_vm_stack_free_call_frame(call);
937
938 if (EG(current_execute_data) == &dummy_execute_data) {
939 EG(current_execute_data) = dummy_execute_data.prev_execute_data;
940 }
941
942 if (EG(exception)) {
943 zend_throw_exception_internal(NULL);
944 }
945 return SUCCESS;
946 }
947 /* }}} */
948
zend_lookup_class_ex(zend_string * name,const zval * key,int use_autoload)949 ZEND_API zend_class_entry *zend_lookup_class_ex(zend_string *name, const zval *key, int use_autoload) /* {{{ */
950 {
951 zend_class_entry *ce = NULL;
952 zval args[1];
953 zval local_retval;
954 zend_string *lc_name;
955 zend_fcall_info fcall_info;
956 zend_fcall_info_cache fcall_cache;
957
958 if (key) {
959 lc_name = Z_STR_P(key);
960 } else {
961 if (name == NULL || !ZSTR_LEN(name)) {
962 return NULL;
963 }
964
965 if (ZSTR_VAL(name)[0] == '\\') {
966 lc_name = zend_string_alloc(ZSTR_LEN(name) - 1, 0);
967 zend_str_tolower_copy(ZSTR_VAL(lc_name), ZSTR_VAL(name) + 1, ZSTR_LEN(name) - 1);
968 } else {
969 lc_name = zend_string_tolower(name);
970 }
971 }
972
973 ce = zend_hash_find_ptr(EG(class_table), lc_name);
974 if (ce) {
975 if (!key) {
976 zend_string_release(lc_name);
977 }
978 return ce;
979 }
980
981 /* The compiler is not-reentrant. Make sure we __autoload() only during run-time
982 * (doesn't impact functionality of __autoload()
983 */
984 if (!use_autoload || zend_is_compiling()) {
985 if (!key) {
986 zend_string_release(lc_name);
987 }
988 return NULL;
989 }
990
991 if (!EG(autoload_func)) {
992 zend_function *func = zend_hash_str_find_ptr(EG(function_table), ZEND_AUTOLOAD_FUNC_NAME, sizeof(ZEND_AUTOLOAD_FUNC_NAME) - 1);
993 if (func) {
994 EG(autoload_func) = func;
995 } else {
996 if (!key) {
997 zend_string_release(lc_name);
998 }
999 return NULL;
1000 }
1001
1002 }
1003
1004 /* Verify class name before passing it to __autoload() */
1005 if (strspn(ZSTR_VAL(name), "0123456789_abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ\177\200\201\202\203\204\205\206\207\210\211\212\213\214\215\216\217\220\221\222\223\224\225\226\227\230\231\232\233\234\235\236\237\240\241\242\243\244\245\246\247\250\251\252\253\254\255\256\257\260\261\262\263\264\265\266\267\270\271\272\273\274\275\276\277\300\301\302\303\304\305\306\307\310\311\312\313\314\315\316\317\320\321\322\323\324\325\326\327\330\331\332\333\334\335\336\337\340\341\342\343\344\345\346\347\350\351\352\353\354\355\356\357\360\361\362\363\364\365\366\367\370\371\372\373\374\375\376\377\\") != ZSTR_LEN(name)) {
1006 if (!key) {
1007 zend_string_release(lc_name);
1008 }
1009 return NULL;
1010 }
1011
1012 if (EG(in_autoload) == NULL) {
1013 ALLOC_HASHTABLE(EG(in_autoload));
1014 zend_hash_init(EG(in_autoload), 8, NULL, NULL, 0);
1015 }
1016
1017 if (zend_hash_add_empty_element(EG(in_autoload), lc_name) == NULL) {
1018 if (!key) {
1019 zend_string_release(lc_name);
1020 }
1021 return NULL;
1022 }
1023
1024 ZVAL_UNDEF(&local_retval);
1025
1026 if (ZSTR_VAL(name)[0] == '\\') {
1027 ZVAL_STRINGL(&args[0], ZSTR_VAL(name) + 1, ZSTR_LEN(name) - 1);
1028 } else {
1029 ZVAL_STR_COPY(&args[0], name);
1030 }
1031
1032 fcall_info.size = sizeof(fcall_info);
1033 fcall_info.function_table = EG(function_table);
1034 ZVAL_STR_COPY(&fcall_info.function_name, EG(autoload_func)->common.function_name);
1035 fcall_info.symbol_table = NULL;
1036 fcall_info.retval = &local_retval;
1037 fcall_info.param_count = 1;
1038 fcall_info.params = args;
1039 fcall_info.object = NULL;
1040 fcall_info.no_separation = 1;
1041
1042 fcall_cache.initialized = 1;
1043 fcall_cache.function_handler = EG(autoload_func);
1044 fcall_cache.calling_scope = NULL;
1045 fcall_cache.called_scope = NULL;
1046 fcall_cache.object = NULL;
1047
1048 zend_exception_save();
1049 if ((zend_call_function(&fcall_info, &fcall_cache) == SUCCESS) && !EG(exception)) {
1050 ce = zend_hash_find_ptr(EG(class_table), lc_name);
1051 }
1052 zend_exception_restore();
1053
1054 zval_ptr_dtor(&args[0]);
1055 zval_dtor(&fcall_info.function_name);
1056
1057 zend_hash_del(EG(in_autoload), lc_name);
1058
1059 zval_ptr_dtor(&local_retval);
1060
1061 if (!key) {
1062 zend_string_release(lc_name);
1063 }
1064 return ce;
1065 }
1066 /* }}} */
1067
zend_lookup_class(zend_string * name)1068 ZEND_API zend_class_entry *zend_lookup_class(zend_string *name) /* {{{ */
1069 {
1070 return zend_lookup_class_ex(name, NULL, 1);
1071 }
1072 /* }}} */
1073
zend_get_called_scope(zend_execute_data * ex)1074 ZEND_API zend_class_entry *zend_get_called_scope(zend_execute_data *ex) /* {{{ */
1075 {
1076 while (ex) {
1077 if (ex->called_scope) {
1078 return ex->called_scope;
1079 } else if (ex->func) {
1080 if (ex->func->type != ZEND_INTERNAL_FUNCTION || ex->func->common.scope) {
1081 return ex->called_scope;
1082 }
1083 }
1084 ex = ex->prev_execute_data;
1085 }
1086 return NULL;
1087 }
1088 /* }}} */
1089
zend_get_this_object(zend_execute_data * ex)1090 ZEND_API zend_object *zend_get_this_object(zend_execute_data *ex) /* {{{ */
1091 {
1092 while (ex) {
1093 if (Z_OBJ(ex->This)) {
1094 return Z_OBJ(ex->This);
1095 } else if (ex->func) {
1096 if (ex->func->type != ZEND_INTERNAL_FUNCTION || ex->func->common.scope) {
1097 return Z_OBJ(ex->This);
1098 }
1099 }
1100 ex = ex->prev_execute_data;
1101 }
1102 return NULL;
1103 }
1104 /* }}} */
1105
zend_eval_stringl(char * str,size_t str_len,zval * retval_ptr,char * string_name)1106 ZEND_API int zend_eval_stringl(char *str, size_t str_len, zval *retval_ptr, char *string_name) /* {{{ */
1107 {
1108 zval pv;
1109 zend_op_array *new_op_array;
1110 uint32_t original_compiler_options;
1111 int retval;
1112
1113 if (retval_ptr) {
1114 ZVAL_NEW_STR(&pv, zend_string_alloc(str_len + sizeof("return ;")-1, 1));
1115 memcpy(Z_STRVAL(pv), "return ", sizeof("return ") - 1);
1116 memcpy(Z_STRVAL(pv) + sizeof("return ") - 1, str, str_len);
1117 Z_STRVAL(pv)[Z_STRLEN(pv) - 1] = ';';
1118 Z_STRVAL(pv)[Z_STRLEN(pv)] = '\0';
1119 } else {
1120 ZVAL_STRINGL(&pv, str, str_len);
1121 }
1122
1123 /*printf("Evaluating '%s'\n", pv.value.str.val);*/
1124
1125 original_compiler_options = CG(compiler_options);
1126 CG(compiler_options) = ZEND_COMPILE_DEFAULT_FOR_EVAL;
1127 new_op_array = zend_compile_string(&pv, string_name);
1128 CG(compiler_options) = original_compiler_options;
1129
1130 if (new_op_array) {
1131 zval local_retval;
1132
1133 EG(no_extensions)=1;
1134
1135 zend_try {
1136 ZVAL_UNDEF(&local_retval);
1137 zend_execute(new_op_array, &local_retval);
1138 } zend_catch {
1139 destroy_op_array(new_op_array);
1140 efree_size(new_op_array, sizeof(zend_op_array));
1141 zend_bailout();
1142 } zend_end_try();
1143
1144 if (Z_TYPE(local_retval) != IS_UNDEF) {
1145 if (retval_ptr) {
1146 ZVAL_COPY_VALUE(retval_ptr, &local_retval);
1147 } else {
1148 zval_ptr_dtor(&local_retval);
1149 }
1150 } else {
1151 if (retval_ptr) {
1152 ZVAL_NULL(retval_ptr);
1153 }
1154 }
1155
1156 EG(no_extensions)=0;
1157 destroy_op_array(new_op_array);
1158 efree_size(new_op_array, sizeof(zend_op_array));
1159 retval = SUCCESS;
1160 } else {
1161 retval = FAILURE;
1162 }
1163 zval_dtor(&pv);
1164 return retval;
1165 }
1166 /* }}} */
1167
zend_eval_string(char * str,zval * retval_ptr,char * string_name)1168 ZEND_API int zend_eval_string(char *str, zval *retval_ptr, char *string_name) /* {{{ */
1169 {
1170 return zend_eval_stringl(str, strlen(str), retval_ptr, string_name);
1171 }
1172 /* }}} */
1173
zend_eval_stringl_ex(char * str,size_t str_len,zval * retval_ptr,char * string_name,int handle_exceptions)1174 ZEND_API int zend_eval_stringl_ex(char *str, size_t str_len, zval *retval_ptr, char *string_name, int handle_exceptions) /* {{{ */
1175 {
1176 int result;
1177
1178 result = zend_eval_stringl(str, str_len, retval_ptr, string_name);
1179 if (handle_exceptions && EG(exception)) {
1180 zend_exception_error(EG(exception), E_ERROR);
1181 result = FAILURE;
1182 }
1183 return result;
1184 }
1185 /* }}} */
1186
zend_eval_string_ex(char * str,zval * retval_ptr,char * string_name,int handle_exceptions)1187 ZEND_API int zend_eval_string_ex(char *str, zval *retval_ptr, char *string_name, int handle_exceptions) /* {{{ */
1188 {
1189 return zend_eval_stringl_ex(str, strlen(str), retval_ptr, string_name, handle_exceptions);
1190 }
1191 /* }}} */
1192
zend_timeout(int dummy)1193 ZEND_API void zend_timeout(int dummy) /* {{{ */
1194 {
1195
1196 if (zend_on_timeout) {
1197 #ifdef ZEND_SIGNALS
1198 /*
1199 We got here because we got a timeout signal, so we are in a signal handler
1200 at this point. However, we want to be able to timeout any user-supplied
1201 shutdown functions, so pretend we are not in a signal handler while we are
1202 calling these
1203 */
1204 SIGG(running) = 0;
1205 #endif
1206 zend_on_timeout(EG(timeout_seconds));
1207 }
1208
1209 zend_error_noreturn(E_ERROR, "Maximum execution time of %pd second%s exceeded", EG(timeout_seconds), EG(timeout_seconds) == 1 ? "" : "s");
1210 }
1211 /* }}} */
1212
1213 #ifdef ZEND_WIN32
tq_timer_cb(PVOID arg,BOOLEAN timed_out)1214 VOID CALLBACK tq_timer_cb(PVOID arg, BOOLEAN timed_out)
1215 {
1216 zend_bool *php_timed_out;
1217
1218 /* The doc states it'll be always true, however it theoretically
1219 could be FALSE when the thread was signaled. */
1220 if (!timed_out) {
1221 return;
1222 }
1223
1224 php_timed_out = (zend_bool *)arg;
1225 *php_timed_out = 1;
1226 }
1227 #endif
1228
1229 /* This one doesn't exists on QNX */
1230 #ifndef SIGPROF
1231 #define SIGPROF 27
1232 #endif
1233
zend_set_timeout(zend_long seconds,int reset_signals)1234 void zend_set_timeout(zend_long seconds, int reset_signals) /* {{{ */
1235 {
1236
1237 EG(timeout_seconds) = seconds;
1238
1239 #ifdef ZEND_WIN32
1240 if(!seconds) {
1241 return;
1242 }
1243
1244 /* Don't use ChangeTimerQueueTimer() as it will not restart an expired
1245 timer, so we could end up with just an ignored timeout. Instead
1246 delete and recreate. */
1247 if (NULL != tq_timer) {
1248 if (!DeleteTimerQueueTimer(NULL, tq_timer, NULL)) {
1249 EG(timed_out) = 0;
1250 tq_timer = NULL;
1251 zend_error_noreturn(E_ERROR, "Could not delete queued timer");
1252 return;
1253 }
1254 tq_timer = NULL;
1255 }
1256
1257 /* XXX passing NULL means the default timer queue provided by the system is used */
1258 if (!CreateTimerQueueTimer(&tq_timer, NULL, (WAITORTIMERCALLBACK)tq_timer_cb, (VOID*)&EG(timed_out), seconds*1000, 0, WT_EXECUTEONLYONCE)) {
1259 EG(timed_out) = 0;
1260 tq_timer = NULL;
1261 zend_error_noreturn(E_ERROR, "Could not queue new timer");
1262 return;
1263 }
1264 EG(timed_out) = 0;
1265 #else
1266 # ifdef HAVE_SETITIMER
1267 {
1268 struct itimerval t_r; /* timeout requested */
1269 int signo;
1270
1271 if(seconds) {
1272 t_r.it_value.tv_sec = seconds;
1273 t_r.it_value.tv_usec = t_r.it_interval.tv_sec = t_r.it_interval.tv_usec = 0;
1274
1275 # ifdef __CYGWIN__
1276 setitimer(ITIMER_REAL, &t_r, NULL);
1277 }
1278 signo = SIGALRM;
1279 # else
1280 setitimer(ITIMER_PROF, &t_r, NULL);
1281 }
1282 signo = SIGPROF;
1283 # endif
1284
1285 if (reset_signals) {
1286 # ifdef ZEND_SIGNALS
1287 zend_signal(signo, zend_timeout);
1288 # else
1289 sigset_t sigset;
1290
1291 signal(signo, zend_timeout);
1292 sigemptyset(&sigset);
1293 sigaddset(&sigset, signo);
1294 sigprocmask(SIG_UNBLOCK, &sigset, NULL);
1295 # endif
1296 }
1297 }
1298 # endif /* HAVE_SETITIMER */
1299 #endif
1300 }
1301 /* }}} */
1302
zend_unset_timeout(void)1303 void zend_unset_timeout(void) /* {{{ */
1304 {
1305 #ifdef ZEND_WIN32
1306 if (NULL != tq_timer) {
1307 if (!DeleteTimerQueueTimer(NULL, tq_timer, NULL)) {
1308 EG(timed_out) = 0;
1309 tq_timer = NULL;
1310 zend_error_noreturn(E_ERROR, "Could not delete queued timer");
1311 return;
1312 }
1313 tq_timer = NULL;
1314 }
1315 EG(timed_out) = 0;
1316 #else
1317 # ifdef HAVE_SETITIMER
1318 if (EG(timeout_seconds)) {
1319 struct itimerval no_timeout;
1320
1321 no_timeout.it_value.tv_sec = no_timeout.it_value.tv_usec = no_timeout.it_interval.tv_sec = no_timeout.it_interval.tv_usec = 0;
1322
1323 #ifdef __CYGWIN__
1324 setitimer(ITIMER_REAL, &no_timeout, NULL);
1325 #else
1326 setitimer(ITIMER_PROF, &no_timeout, NULL);
1327 #endif
1328 }
1329 # endif
1330 #endif
1331 }
1332 /* }}} */
1333
zend_fetch_class(zend_string * class_name,int fetch_type)1334 zend_class_entry *zend_fetch_class(zend_string *class_name, int fetch_type) /* {{{ */
1335 {
1336 zend_class_entry *ce;
1337 int fetch_sub_type = fetch_type & ZEND_FETCH_CLASS_MASK;
1338
1339 check_fetch_type:
1340 switch (fetch_sub_type) {
1341 case ZEND_FETCH_CLASS_SELF:
1342 if (UNEXPECTED(!EG(scope))) {
1343 zend_throw_or_error(fetch_type, NULL, "Cannot access self:: when no class scope is active");
1344 }
1345 return EG(scope);
1346 case ZEND_FETCH_CLASS_PARENT:
1347 if (UNEXPECTED(!EG(scope))) {
1348 zend_throw_or_error(fetch_type, NULL, "Cannot access parent:: when no class scope is active");
1349 return NULL;
1350 }
1351 if (UNEXPECTED(!EG(scope)->parent)) {
1352 zend_throw_or_error(fetch_type, NULL, "Cannot access parent:: when current class scope has no parent");
1353 }
1354 return EG(scope)->parent;
1355 case ZEND_FETCH_CLASS_STATIC:
1356 ce = zend_get_called_scope(EG(current_execute_data));
1357 if (UNEXPECTED(!ce)) {
1358 zend_throw_or_error(fetch_type, NULL, "Cannot access static:: when no class scope is active");
1359 return NULL;
1360 }
1361 return ce;
1362 case ZEND_FETCH_CLASS_AUTO: {
1363 fetch_sub_type = zend_get_class_fetch_type(class_name);
1364 if (UNEXPECTED(fetch_sub_type != ZEND_FETCH_CLASS_DEFAULT)) {
1365 goto check_fetch_type;
1366 }
1367 }
1368 break;
1369 }
1370
1371 if (fetch_type & ZEND_FETCH_CLASS_NO_AUTOLOAD) {
1372 return zend_lookup_class_ex(class_name, NULL, 0);
1373 } else if ((ce = zend_lookup_class_ex(class_name, NULL, 1)) == NULL) {
1374 if (!(fetch_type & ZEND_FETCH_CLASS_SILENT) && !EG(exception)) {
1375 if (fetch_sub_type == ZEND_FETCH_CLASS_INTERFACE) {
1376 zend_throw_or_error(fetch_type, NULL, "Interface '%s' not found", ZSTR_VAL(class_name));
1377 } else if (fetch_sub_type == ZEND_FETCH_CLASS_TRAIT) {
1378 zend_throw_or_error(fetch_type, NULL, "Trait '%s' not found", ZSTR_VAL(class_name));
1379 } else {
1380 zend_throw_or_error(fetch_type, NULL, "Class '%s' not found", ZSTR_VAL(class_name));
1381 }
1382 }
1383 return NULL;
1384 }
1385 return ce;
1386 }
1387 /* }}} */
1388
zend_fetch_class_by_name(zend_string * class_name,const zval * key,int fetch_type)1389 zend_class_entry *zend_fetch_class_by_name(zend_string *class_name, const zval *key, int fetch_type) /* {{{ */
1390 {
1391 zend_class_entry *ce;
1392
1393 if (fetch_type & ZEND_FETCH_CLASS_NO_AUTOLOAD) {
1394 return zend_lookup_class_ex(class_name, key, 0);
1395 } else if ((ce = zend_lookup_class_ex(class_name, key, 1)) == NULL) {
1396 if ((fetch_type & ZEND_FETCH_CLASS_SILENT) == 0 && !EG(exception)) {
1397 if ((fetch_type & ZEND_FETCH_CLASS_MASK) == ZEND_FETCH_CLASS_INTERFACE) {
1398 zend_throw_or_error(fetch_type, NULL, "Interface '%s' not found", ZSTR_VAL(class_name));
1399 } else if ((fetch_type & ZEND_FETCH_CLASS_MASK) == ZEND_FETCH_CLASS_TRAIT) {
1400 zend_throw_or_error(fetch_type, NULL, "Trait '%s' not found", ZSTR_VAL(class_name));
1401 } else {
1402 zend_throw_or_error(fetch_type, NULL, "Class '%s' not found", ZSTR_VAL(class_name));
1403 }
1404 }
1405 return NULL;
1406 }
1407 return ce;
1408 }
1409 /* }}} */
1410
1411 #define MAX_ABSTRACT_INFO_CNT 3
1412 #define MAX_ABSTRACT_INFO_FMT "%s%s%s%s"
1413 #define DISPLAY_ABSTRACT_FN(idx) \
1414 ai.afn[idx] ? ZEND_FN_SCOPE_NAME(ai.afn[idx]) : "", \
1415 ai.afn[idx] ? "::" : "", \
1416 ai.afn[idx] ? ZSTR_VAL(ai.afn[idx]->common.function_name) : "", \
1417 ai.afn[idx] && ai.afn[idx + 1] ? ", " : (ai.afn[idx] && ai.cnt > MAX_ABSTRACT_INFO_CNT ? ", ..." : "")
1418
1419 typedef struct _zend_abstract_info {
1420 zend_function *afn[MAX_ABSTRACT_INFO_CNT + 1];
1421 int cnt;
1422 int ctor;
1423 } zend_abstract_info;
1424
zend_verify_abstract_class_function(zend_function * fn,zend_abstract_info * ai)1425 static void zend_verify_abstract_class_function(zend_function *fn, zend_abstract_info *ai) /* {{{ */
1426 {
1427 if (fn->common.fn_flags & ZEND_ACC_ABSTRACT) {
1428 if (ai->cnt < MAX_ABSTRACT_INFO_CNT) {
1429 ai->afn[ai->cnt] = fn;
1430 }
1431 if (fn->common.fn_flags & ZEND_ACC_CTOR) {
1432 if (!ai->ctor) {
1433 ai->cnt++;
1434 ai->ctor = 1;
1435 } else {
1436 ai->afn[ai->cnt] = NULL;
1437 }
1438 } else {
1439 ai->cnt++;
1440 }
1441 }
1442 }
1443 /* }}} */
1444
zend_verify_abstract_class(zend_class_entry * ce)1445 void zend_verify_abstract_class(zend_class_entry *ce) /* {{{ */
1446 {
1447 zend_function *func;
1448 zend_abstract_info ai;
1449
1450 if ((ce->ce_flags & ZEND_ACC_IMPLICIT_ABSTRACT_CLASS) && !(ce->ce_flags & (ZEND_ACC_TRAIT | ZEND_ACC_EXPLICIT_ABSTRACT_CLASS))) {
1451 memset(&ai, 0, sizeof(ai));
1452
1453 ZEND_HASH_FOREACH_PTR(&ce->function_table, func) {
1454 zend_verify_abstract_class_function(func, &ai);
1455 } ZEND_HASH_FOREACH_END();
1456
1457 if (ai.cnt) {
1458 zend_error_noreturn(E_ERROR, "Class %s contains %d abstract method%s and must therefore be declared abstract or implement the remaining methods (" MAX_ABSTRACT_INFO_FMT MAX_ABSTRACT_INFO_FMT MAX_ABSTRACT_INFO_FMT ")",
1459 ZSTR_VAL(ce->name), ai.cnt,
1460 ai.cnt > 1 ? "s" : "",
1461 DISPLAY_ABSTRACT_FN(0),
1462 DISPLAY_ABSTRACT_FN(1),
1463 DISPLAY_ABSTRACT_FN(2)
1464 );
1465 }
1466 }
1467 }
1468 /* }}} */
1469
zend_delete_global_variable(zend_string * name)1470 ZEND_API int zend_delete_global_variable(zend_string *name) /* {{{ */
1471 {
1472 return zend_hash_del_ind(&EG(symbol_table), name);
1473 }
1474 /* }}} */
1475
zend_rebuild_symbol_table(void)1476 ZEND_API zend_array *zend_rebuild_symbol_table(void) /* {{{ */
1477 {
1478 zend_execute_data *ex;
1479 zend_array *symbol_table;
1480
1481 /* Search for last called user function */
1482 ex = EG(current_execute_data);
1483 while (ex && (!ex->func || !ZEND_USER_CODE(ex->func->common.type))) {
1484 ex = ex->prev_execute_data;
1485 }
1486 if (!ex) {
1487 return NULL;
1488 }
1489 if (ex->symbol_table) {
1490 return ex->symbol_table;
1491 }
1492
1493 if (EG(symtable_cache_ptr) >= EG(symtable_cache)) {
1494 /*printf("Cache hit! Reusing %x\n", symtable_cache[symtable_cache_ptr]);*/
1495 symbol_table = ex->symbol_table = *(EG(symtable_cache_ptr)--);
1496 if (!ex->func->op_array.last_var) {
1497 return symbol_table;
1498 }
1499 zend_hash_extend(symbol_table, ex->func->op_array.last_var, 0);
1500 } else {
1501 symbol_table = ex->symbol_table = emalloc(sizeof(zend_array));
1502 zend_hash_init(symbol_table, ex->func->op_array.last_var, NULL, ZVAL_PTR_DTOR, 0);
1503 if (!ex->func->op_array.last_var) {
1504 return symbol_table;
1505 }
1506 zend_hash_real_init(symbol_table, 0);
1507 /*printf("Cache miss! Initialized %x\n", EG(active_symbol_table));*/
1508 }
1509 if (EXPECTED(ex->func->op_array.last_var)) {
1510 zend_string **str = ex->func->op_array.vars;
1511 zend_string **end = str + ex->func->op_array.last_var;
1512 zval *var = ZEND_CALL_VAR_NUM(ex, 0);
1513
1514 do {
1515 _zend_hash_append_ind(symbol_table, *str, var);
1516 str++;
1517 var++;
1518 } while (str != end);
1519 }
1520 return symbol_table;
1521 }
1522 /* }}} */
1523
zend_attach_symbol_table(zend_execute_data * execute_data)1524 ZEND_API void zend_attach_symbol_table(zend_execute_data *execute_data) /* {{{ */
1525 {
1526 zend_op_array *op_array = &execute_data->func->op_array;
1527 HashTable *ht = execute_data->symbol_table;
1528
1529 /* copy real values from symbol table into CV slots and create
1530 INDIRECT references to CV in symbol table */
1531 if (EXPECTED(op_array->last_var)) {
1532 zend_string **str = op_array->vars;
1533 zend_string **end = str + op_array->last_var;
1534 zval *var = EX_VAR_NUM(0);
1535
1536 do {
1537 zval *zv = zend_hash_find(ht, *str);
1538
1539 if (zv) {
1540 if (Z_TYPE_P(zv) == IS_INDIRECT) {
1541 zval *val = Z_INDIRECT_P(zv);
1542
1543 ZVAL_COPY_VALUE(var, val);
1544 } else {
1545 ZVAL_COPY_VALUE(var, zv);
1546 }
1547 } else {
1548 ZVAL_UNDEF(var);
1549 zv = zend_hash_add_new(ht, *str, var);
1550 }
1551 ZVAL_INDIRECT(zv, var);
1552 str++;
1553 var++;
1554 } while (str != end);
1555 }
1556 }
1557 /* }}} */
1558
zend_detach_symbol_table(zend_execute_data * execute_data)1559 ZEND_API void zend_detach_symbol_table(zend_execute_data *execute_data) /* {{{ */
1560 {
1561 zend_op_array *op_array = &execute_data->func->op_array;
1562 HashTable *ht = execute_data->symbol_table;
1563
1564 /* copy real values from CV slots into symbol table */
1565 if (EXPECTED(op_array->last_var)) {
1566 zend_string **str = op_array->vars;
1567 zend_string **end = str + op_array->last_var;
1568 zval *var = EX_VAR_NUM(0);
1569
1570 do {
1571 if (Z_TYPE_P(var) == IS_UNDEF) {
1572 zend_hash_del(ht, *str);
1573 } else {
1574 zend_hash_update(ht, *str, var);
1575 ZVAL_UNDEF(var);
1576 }
1577 str++;
1578 var++;
1579 } while (str != end);
1580 }
1581 }
1582 /* }}} */
1583
zend_set_local_var(zend_string * name,zval * value,int force)1584 ZEND_API int zend_set_local_var(zend_string *name, zval *value, int force) /* {{{ */
1585 {
1586 zend_execute_data *execute_data = EG(current_execute_data);
1587
1588 while (execute_data && (!execute_data->func || !ZEND_USER_CODE(execute_data->func->common.type))) {
1589 execute_data = execute_data->prev_execute_data;
1590 }
1591
1592 if (execute_data) {
1593 if (!execute_data->symbol_table) {
1594 zend_ulong h = zend_string_hash_val(name);
1595 zend_op_array *op_array = &execute_data->func->op_array;
1596
1597 if (EXPECTED(op_array->last_var)) {
1598 zend_string **str = op_array->vars;
1599 zend_string **end = str + op_array->last_var;
1600
1601 do {
1602 if (ZSTR_H(*str) == h &&
1603 ZSTR_LEN(*str) == ZSTR_LEN(name) &&
1604 memcmp(ZSTR_VAL(*str), ZSTR_VAL(name), ZSTR_LEN(name)) == 0) {
1605 zval *var = EX_VAR_NUM(str - op_array->vars);
1606 ZVAL_COPY_VALUE(var, value);
1607 return SUCCESS;
1608 }
1609 str++;
1610 } while (str != end);
1611 }
1612 if (force) {
1613 zend_array *symbol_table = zend_rebuild_symbol_table();
1614 if (symbol_table) {
1615 return zend_hash_update(symbol_table, name, value) ? SUCCESS : FAILURE;;
1616 }
1617 }
1618 } else {
1619 return (zend_hash_update_ind(execute_data->symbol_table, name, value) != NULL) ? SUCCESS : FAILURE;
1620 }
1621 }
1622 return FAILURE;
1623 }
1624 /* }}} */
1625
zend_set_local_var_str(const char * name,size_t len,zval * value,int force)1626 ZEND_API int zend_set_local_var_str(const char *name, size_t len, zval *value, int force) /* {{{ */
1627 {
1628 zend_execute_data *execute_data = EG(current_execute_data);
1629
1630 while (execute_data && (!execute_data->func || !ZEND_USER_CODE(execute_data->func->common.type))) {
1631 execute_data = execute_data->prev_execute_data;
1632 }
1633
1634 if (execute_data) {
1635 if (!execute_data->symbol_table) {
1636 zend_ulong h = zend_hash_func(name, len);
1637 zend_op_array *op_array = &execute_data->func->op_array;
1638 if (EXPECTED(op_array->last_var)) {
1639 zend_string **str = op_array->vars;
1640 zend_string **end = str + op_array->last_var;
1641
1642 do {
1643 if (ZSTR_H(*str) == h &&
1644 ZSTR_LEN(*str) == len &&
1645 memcmp(ZSTR_VAL(*str), name, len) == 0) {
1646 zval *var = EX_VAR_NUM(str - op_array->vars);
1647 zval_ptr_dtor(var);
1648 ZVAL_COPY_VALUE(var, value);
1649 return SUCCESS;
1650 }
1651 str++;
1652 } while (str != end);
1653 }
1654 if (force) {
1655 zend_array *symbol_table = zend_rebuild_symbol_table();
1656 if (symbol_table) {
1657 return zend_hash_str_update(symbol_table, name, len, value) ? SUCCESS : FAILURE;;
1658 }
1659 }
1660 } else {
1661 return (zend_hash_str_update_ind(execute_data->symbol_table, name, len, value) != NULL) ? SUCCESS : FAILURE;
1662 }
1663 }
1664 return FAILURE;
1665 }
1666 /* }}} */
1667
1668 /*
1669 * Local variables:
1670 * tab-width: 4
1671 * c-basic-offset: 4
1672 * indent-tabs-mode: t
1673 * End:
1674 */
1675
