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 #define ZEND_INTENSIVE_DEBUGGING 0
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_ptr_stack.h"
31 #include "zend_constants.h"
32 #include "zend_extensions.h"
33 #include "zend_ini.h"
34 #include "zend_exceptions.h"
35 #include "zend_interfaces.h"
36 #include "zend_closures.h"
37 #include "zend_generators.h"
38 #include "zend_vm.h"
39 #include "zend_dtrace.h"
40 #include "zend_inheritance.h"
41 #include "zend_type_info.h"
42
43 /* Virtual current working directory support */
44 #include "zend_virtual_cwd.h"
45
46 #ifdef HAVE_GCC_GLOBAL_REGS
47 # if defined(__GNUC__) && ZEND_GCC_VERSION >= 4008 && defined(i386)
48 # define ZEND_VM_FP_GLOBAL_REG "%esi"
49 # define ZEND_VM_IP_GLOBAL_REG "%edi"
50 # elif defined(__GNUC__) && ZEND_GCC_VERSION >= 4008 && defined(__x86_64__)
51 # define ZEND_VM_FP_GLOBAL_REG "%r14"
52 # define ZEND_VM_IP_GLOBAL_REG "%r15"
53 # elif defined(__GNUC__) && ZEND_GCC_VERSION >= 4008 && defined(__powerpc64__)
54 # define ZEND_VM_FP_GLOBAL_REG "r14"
55 # define ZEND_VM_IP_GLOBAL_REG "r15"
56 # elif defined(__IBMC__) && ZEND_GCC_VERSION >= 4002 && defined(__powerpc64__)
57 # define ZEND_VM_FP_GLOBAL_REG "r14"
58 # define ZEND_VM_IP_GLOBAL_REG "r15"
59 # elif defined(__GNUC__) && ZEND_GCC_VERSION >= 4008 && defined(__aarch64__)
60 # define ZEND_VM_FP_GLOBAL_REG "x27"
61 # define ZEND_VM_IP_GLOBAL_REG "x28"
62 # endif
63 #endif
64
65 #if defined(ZEND_VM_FP_GLOBAL_REG) && ((ZEND_VM_KIND == ZEND_VM_KIND_CALL) || (ZEND_VM_KIND == ZEND_VM_KIND_HYBRID))
66 # pragma GCC diagnostic ignored "-Wvolatile-register-var"
67 register zend_execute_data* volatile execute_data __asm__(ZEND_VM_FP_GLOBAL_REG);
68 # pragma GCC diagnostic warning "-Wvolatile-register-var"
69 #endif
70
71 #if defined(ZEND_VM_FP_GLOBAL_REG) && ((ZEND_VM_KIND == ZEND_VM_KIND_CALL) || (ZEND_VM_KIND == ZEND_VM_KIND_HYBRID))
72 # define EXECUTE_DATA_D void
73 # define EXECUTE_DATA_C
74 # define EXECUTE_DATA_DC
75 # define EXECUTE_DATA_CC
76 # define NO_EXECUTE_DATA_CC
77 #else
78 # define EXECUTE_DATA_D zend_execute_data* execute_data
79 # define EXECUTE_DATA_C execute_data
80 # define EXECUTE_DATA_DC , EXECUTE_DATA_D
81 # define EXECUTE_DATA_CC , EXECUTE_DATA_C
82 # define NO_EXECUTE_DATA_CC , NULL
83 #endif
84
85 #if defined(ZEND_VM_FP_GLOBAL_REG) && ((ZEND_VM_KIND == ZEND_VM_KIND_CALL) || (ZEND_VM_KIND == ZEND_VM_KIND_HYBRID))
86 # define OPLINE_D void
87 # define OPLINE_C
88 # define OPLINE_DC
89 # define OPLINE_CC
90 #else
91 # define OPLINE_D const zend_op* opline
92 # define OPLINE_C opline
93 # define OPLINE_DC , OPLINE_D
94 # define OPLINE_CC , OPLINE_C
95 #endif
96
97 #if defined(ZEND_VM_IP_GLOBAL_REG) && ((ZEND_VM_KIND == ZEND_VM_KIND_CALL) || (ZEND_VM_KIND == ZEND_VM_KIND_HYBRID))
98 # pragma GCC diagnostic ignored "-Wvolatile-register-var"
99 register const zend_op* volatile opline __asm__(ZEND_VM_IP_GLOBAL_REG);
100 # pragma GCC diagnostic warning "-Wvolatile-register-var"
101 #else
102 #endif
103
104 #define _CONST_CODE 0
105 #define _TMP_CODE 1
106 #define _VAR_CODE 2
107 #define _UNUSED_CODE 3
108 #define _CV_CODE 4
109
110 typedef int (ZEND_FASTCALL *incdec_t)(zval *);
111
112 #define get_zval_ptr(op_type, node, should_free, type) _get_zval_ptr(op_type, node, should_free, type EXECUTE_DATA_CC OPLINE_CC)
113 #define get_zval_ptr_deref(op_type, node, should_free, type) _get_zval_ptr_deref(op_type, node, should_free, type EXECUTE_DATA_CC OPLINE_CC)
114 #define get_zval_ptr_undef(op_type, node, should_free, type) _get_zval_ptr_undef(op_type, node, should_free, type EXECUTE_DATA_CC OPLINE_CC)
115 #define get_op_data_zval_ptr_r(op_type, node, should_free) _get_op_data_zval_ptr_r(op_type, node, should_free EXECUTE_DATA_CC OPLINE_CC)
116 #define get_op_data_zval_ptr_deref_r(op_type, node, should_free) _get_op_data_zval_ptr_deref_r(op_type, node, should_free EXECUTE_DATA_CC OPLINE_CC)
117 #define get_zval_ptr_ptr(op_type, node, should_free, type) _get_zval_ptr_ptr(op_type, node, should_free, type EXECUTE_DATA_CC)
118 #define get_zval_ptr_ptr_undef(op_type, node, should_free, type) _get_zval_ptr_ptr(op_type, node, should_free, type EXECUTE_DATA_CC)
119 #define get_obj_zval_ptr(op_type, node, should_free, type) _get_obj_zval_ptr(op_type, node, should_free, type EXECUTE_DATA_CC OPLINE_CC)
120 #define get_obj_zval_ptr_undef(op_type, node, should_free, type) _get_obj_zval_ptr_undef(op_type, node, should_free, type EXECUTE_DATA_CC OPLINE_CC)
121 #define get_obj_zval_ptr_ptr(op_type, node, should_free, type) _get_obj_zval_ptr_ptr(op_type, node, should_free, type EXECUTE_DATA_CC)
122
123 #define RETURN_VALUE_USED(opline) ((opline)->result_type != IS_UNUSED)
124
ZEND_FUNCTION(pass)125 static ZEND_FUNCTION(pass)
126 {
127 }
128
129 ZEND_API const zend_internal_function zend_pass_function = {
130 ZEND_INTERNAL_FUNCTION, /* type */
131 {0, 0, 0}, /* arg_flags */
132 0, /* fn_flags */
133 NULL, /* name */
134 NULL, /* scope */
135 NULL, /* prototype */
136 0, /* num_args */
137 0, /* required_num_args */
138 NULL, /* arg_info */
139 ZEND_FN(pass), /* handler */
140 NULL, /* module */
141 {NULL,NULL,NULL,NULL} /* reserved */
142 };
143
144 #define FREE_VAR_PTR_AND_EXTRACT_RESULT_IF_NECESSARY(free_op, result) do { \
145 zval *__container_to_free = (free_op); \
146 if (UNEXPECTED(__container_to_free) \
147 && EXPECTED(Z_REFCOUNTED_P(__container_to_free))) { \
148 zend_refcounted *__ref = Z_COUNTED_P(__container_to_free); \
149 if (UNEXPECTED(!GC_DELREF(__ref))) { \
150 zval *__zv = (result); \
151 if (EXPECTED(Z_TYPE_P(__zv) == IS_INDIRECT)) { \
152 ZVAL_COPY(__zv, Z_INDIRECT_P(__zv)); \
153 } \
154 rc_dtor_func(__ref); \
155 } \
156 } \
157 } while (0)
158
159 #define FREE_OP(should_free) \
160 if (should_free) { \
161 zval_ptr_dtor_nogc(should_free); \
162 }
163
164 #define FREE_UNFETCHED_OP(type, var) \
165 if ((type) & (IS_TMP_VAR|IS_VAR)) { \
166 zval_ptr_dtor_nogc(EX_VAR(var)); \
167 }
168
169 #define FREE_OP_VAR_PTR(should_free) \
170 if (should_free) { \
171 zval_ptr_dtor_nogc(should_free); \
172 }
173
174 #define CV_DEF_OF(i) (EX(func)->op_array.vars[i])
175
176 #define ZEND_VM_STACK_PAGE_SLOTS (16 * 1024) /* should be a power of 2 */
177
178 #define ZEND_VM_STACK_PAGE_SIZE (ZEND_VM_STACK_PAGE_SLOTS * sizeof(zval))
179
180 #define ZEND_VM_STACK_PAGE_ALIGNED_SIZE(size, page_size) \
181 (((size) + ZEND_VM_STACK_HEADER_SLOTS * sizeof(zval) \
182 + ((page_size) - 1)) & ~((page_size) - 1))
183
zend_vm_stack_new_page(size_t size,zend_vm_stack prev)184 static zend_always_inline zend_vm_stack zend_vm_stack_new_page(size_t size, zend_vm_stack prev) {
185 zend_vm_stack page = (zend_vm_stack)emalloc(size);
186
187 page->top = ZEND_VM_STACK_ELEMENTS(page);
188 page->end = (zval*)((char*)page + size);
189 page->prev = prev;
190 return page;
191 }
192
zend_vm_stack_init(void)193 ZEND_API void zend_vm_stack_init(void)
194 {
195 EG(vm_stack_page_size) = ZEND_VM_STACK_PAGE_SIZE;
196 EG(vm_stack) = zend_vm_stack_new_page(ZEND_VM_STACK_PAGE_SIZE, NULL);
197 EG(vm_stack_top) = EG(vm_stack)->top;
198 EG(vm_stack_end) = EG(vm_stack)->end;
199 }
200
zend_vm_stack_init_ex(size_t page_size)201 ZEND_API void zend_vm_stack_init_ex(size_t page_size)
202 {
203 /* page_size must be a power of 2 */
204 ZEND_ASSERT(page_size > 0 && (page_size & (page_size - 1)) == 0);
205 EG(vm_stack_page_size) = page_size;
206 EG(vm_stack) = zend_vm_stack_new_page(page_size, NULL);
207 EG(vm_stack_top) = EG(vm_stack)->top;
208 EG(vm_stack_end) = EG(vm_stack)->end;
209 }
210
zend_vm_stack_destroy(void)211 ZEND_API void zend_vm_stack_destroy(void)
212 {
213 zend_vm_stack stack = EG(vm_stack);
214
215 while (stack != NULL) {
216 zend_vm_stack p = stack->prev;
217 efree(stack);
218 stack = p;
219 }
220 }
221
zend_vm_stack_extend(size_t size)222 ZEND_API void* zend_vm_stack_extend(size_t size)
223 {
224 zend_vm_stack stack;
225 void *ptr;
226
227 stack = EG(vm_stack);
228 stack->top = EG(vm_stack_top);
229 EG(vm_stack) = stack = zend_vm_stack_new_page(
230 EXPECTED(size < EG(vm_stack_page_size) - (ZEND_VM_STACK_HEADER_SLOTS * sizeof(zval))) ?
231 EG(vm_stack_page_size) : ZEND_VM_STACK_PAGE_ALIGNED_SIZE(size, EG(vm_stack_page_size)),
232 stack);
233 ptr = stack->top;
234 EG(vm_stack_top) = (void*)(((char*)ptr) + size);
235 EG(vm_stack_end) = stack->end;
236 return ptr;
237 }
238
zend_get_compiled_variable_value(const zend_execute_data * execute_data,uint32_t var)239 ZEND_API zval* zend_get_compiled_variable_value(const zend_execute_data *execute_data, uint32_t var)
240 {
241 return EX_VAR(var);
242 }
243
_get_zval_ptr_tmp(uint32_t var,zend_free_op * should_free EXECUTE_DATA_DC)244 static zend_always_inline zval *_get_zval_ptr_tmp(uint32_t var, zend_free_op *should_free EXECUTE_DATA_DC)
245 {
246 zval *ret = EX_VAR(var);
247 *should_free = ret;
248
249 ZEND_ASSERT(Z_TYPE_P(ret) != IS_REFERENCE);
250
251 return ret;
252 }
253
_get_zval_ptr_var(uint32_t var,zend_free_op * should_free EXECUTE_DATA_DC)254 static zend_always_inline zval *_get_zval_ptr_var(uint32_t var, zend_free_op *should_free EXECUTE_DATA_DC)
255 {
256 zval *ret = EX_VAR(var);
257
258 *should_free = ret;
259 return ret;
260 }
261
_get_zval_ptr_var_deref(uint32_t var,zend_free_op * should_free EXECUTE_DATA_DC)262 static zend_always_inline zval *_get_zval_ptr_var_deref(uint32_t var, zend_free_op *should_free EXECUTE_DATA_DC)
263 {
264 zval *ret = EX_VAR(var);
265
266 *should_free = ret;
267 ZVAL_DEREF(ret);
268 return ret;
269 }
270
zval_undefined_cv(uint32_t var EXECUTE_DATA_DC)271 static zend_never_inline ZEND_COLD zval* zval_undefined_cv(uint32_t var EXECUTE_DATA_DC)
272 {
273 if (EXPECTED(EG(exception) == NULL)) {
274 zend_string *cv = CV_DEF_OF(EX_VAR_TO_NUM(var));
275 zend_error(E_NOTICE, "Undefined variable: %s", ZSTR_VAL(cv));
276 }
277 return &EG(uninitialized_zval);
278 }
279
_zval_undefined_op1(EXECUTE_DATA_D)280 static zend_never_inline ZEND_COLD zval* ZEND_FASTCALL _zval_undefined_op1(EXECUTE_DATA_D)
281 {
282 return zval_undefined_cv(EX(opline)->op1.var EXECUTE_DATA_CC);
283 }
284
_zval_undefined_op2(EXECUTE_DATA_D)285 static zend_never_inline ZEND_COLD zval* ZEND_FASTCALL _zval_undefined_op2(EXECUTE_DATA_D)
286 {
287 return zval_undefined_cv(EX(opline)->op2.var EXECUTE_DATA_CC);
288 }
289
290 #define ZVAL_UNDEFINED_OP1() _zval_undefined_op1(EXECUTE_DATA_C)
291 #define ZVAL_UNDEFINED_OP2() _zval_undefined_op2(EXECUTE_DATA_C)
292
_get_zval_cv_lookup(zval * ptr,uint32_t var,int type EXECUTE_DATA_DC)293 static zend_never_inline ZEND_COLD zval *_get_zval_cv_lookup(zval *ptr, uint32_t var, int type EXECUTE_DATA_DC)
294 {
295 switch (type) {
296 case BP_VAR_R:
297 case BP_VAR_UNSET:
298 ptr = zval_undefined_cv(var EXECUTE_DATA_CC);
299 break;
300 case BP_VAR_IS:
301 ptr = &EG(uninitialized_zval);
302 break;
303 case BP_VAR_RW:
304 zval_undefined_cv(var EXECUTE_DATA_CC);
305 /* break missing intentionally */
306 case BP_VAR_W:
307 ZVAL_NULL(ptr);
308 break;
309 }
310 return ptr;
311 }
312
_get_zval_ptr_cv(uint32_t var,int type EXECUTE_DATA_DC)313 static zend_always_inline zval *_get_zval_ptr_cv(uint32_t var, int type EXECUTE_DATA_DC)
314 {
315 zval *ret = EX_VAR(var);
316
317 if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
318 if (type == BP_VAR_W) {
319 ZVAL_NULL(ret);
320 } else {
321 return _get_zval_cv_lookup(ret, var, type EXECUTE_DATA_CC);
322 }
323 }
324 return ret;
325 }
326
_get_zval_ptr_cv_deref(uint32_t var,int type EXECUTE_DATA_DC)327 static zend_always_inline zval *_get_zval_ptr_cv_deref(uint32_t var, int type EXECUTE_DATA_DC)
328 {
329 zval *ret = EX_VAR(var);
330
331 if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
332 if (type == BP_VAR_W) {
333 ZVAL_NULL(ret);
334 return ret;
335 } else {
336 return _get_zval_cv_lookup(ret, var, type EXECUTE_DATA_CC);
337 }
338 }
339 ZVAL_DEREF(ret);
340 return ret;
341 }
342
_get_zval_ptr_cv_BP_VAR_R(uint32_t var EXECUTE_DATA_DC)343 static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_R(uint32_t var EXECUTE_DATA_DC)
344 {
345 zval *ret = EX_VAR(var);
346
347 if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
348 return zval_undefined_cv(var EXECUTE_DATA_CC);
349 }
350 return ret;
351 }
352
_get_zval_ptr_cv_deref_BP_VAR_R(uint32_t var EXECUTE_DATA_DC)353 static zend_always_inline zval *_get_zval_ptr_cv_deref_BP_VAR_R(uint32_t var EXECUTE_DATA_DC)
354 {
355 zval *ret = EX_VAR(var);
356
357 if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
358 return zval_undefined_cv(var EXECUTE_DATA_CC);
359 }
360 ZVAL_DEREF(ret);
361 return ret;
362 }
363
_get_zval_ptr_cv_BP_VAR_IS(uint32_t var EXECUTE_DATA_DC)364 static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_IS(uint32_t var EXECUTE_DATA_DC)
365 {
366 zval *ret = EX_VAR(var);
367
368 return ret;
369 }
370
_get_zval_ptr_cv_BP_VAR_RW(uint32_t var EXECUTE_DATA_DC)371 static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_RW(uint32_t var EXECUTE_DATA_DC)
372 {
373 zval *ret = EX_VAR(var);
374
375 if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
376 ZVAL_NULL(ret);
377 zval_undefined_cv(var EXECUTE_DATA_CC);
378 return ret;
379 }
380 return ret;
381 }
382
_get_zval_ptr_cv_BP_VAR_W(uint32_t var EXECUTE_DATA_DC)383 static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_W(uint32_t var EXECUTE_DATA_DC)
384 {
385 zval *ret = EX_VAR(var);
386
387 if (Z_TYPE_P(ret) == IS_UNDEF) {
388 ZVAL_NULL(ret);
389 }
390 return ret;
391 }
392
_get_zval_ptr(int op_type,znode_op node,zend_free_op * should_free,int type EXECUTE_DATA_DC OPLINE_DC)393 static zend_always_inline zval *_get_zval_ptr(int op_type, znode_op node, zend_free_op *should_free, int type EXECUTE_DATA_DC OPLINE_DC)
394 {
395 if (op_type & (IS_TMP_VAR|IS_VAR)) {
396 if (!ZEND_DEBUG || op_type == IS_VAR) {
397 return _get_zval_ptr_var(node.var, should_free EXECUTE_DATA_CC);
398 } else {
399 ZEND_ASSERT(op_type == IS_TMP_VAR);
400 return _get_zval_ptr_tmp(node.var, should_free EXECUTE_DATA_CC);
401 }
402 } else {
403 *should_free = NULL;
404 if (op_type == IS_CONST) {
405 return RT_CONSTANT(opline, node);
406 } else if (op_type == IS_CV) {
407 return _get_zval_ptr_cv(node.var, type EXECUTE_DATA_CC);
408 } else {
409 return NULL;
410 }
411 }
412 }
413
_get_op_data_zval_ptr_r(int op_type,znode_op node,zend_free_op * should_free EXECUTE_DATA_DC OPLINE_DC)414 static zend_always_inline zval *_get_op_data_zval_ptr_r(int op_type, znode_op node, zend_free_op *should_free EXECUTE_DATA_DC OPLINE_DC)
415 {
416 if (op_type & (IS_TMP_VAR|IS_VAR)) {
417 if (!ZEND_DEBUG || op_type == IS_VAR) {
418 return _get_zval_ptr_var(node.var, should_free EXECUTE_DATA_CC);
419 } else {
420 ZEND_ASSERT(op_type == IS_TMP_VAR);
421 return _get_zval_ptr_tmp(node.var, should_free EXECUTE_DATA_CC);
422 }
423 } else {
424 *should_free = NULL;
425 if (op_type == IS_CONST) {
426 return RT_CONSTANT(opline + 1, node);
427 } else if (op_type == IS_CV) {
428 return _get_zval_ptr_cv_BP_VAR_R(node.var EXECUTE_DATA_CC);
429 } else {
430 return NULL;
431 }
432 }
433 }
434
_get_zval_ptr_deref(int op_type,znode_op node,zend_free_op * should_free,int type EXECUTE_DATA_DC OPLINE_DC)435 static zend_always_inline ZEND_ATTRIBUTE_UNUSED zval *_get_zval_ptr_deref(int op_type, znode_op node, zend_free_op *should_free, int type EXECUTE_DATA_DC OPLINE_DC)
436 {
437 if (op_type & (IS_TMP_VAR|IS_VAR)) {
438 if (op_type == IS_TMP_VAR) {
439 return _get_zval_ptr_tmp(node.var, should_free EXECUTE_DATA_CC);
440 } else {
441 ZEND_ASSERT(op_type == IS_VAR);
442 return _get_zval_ptr_var_deref(node.var, should_free EXECUTE_DATA_CC);
443 }
444 } else {
445 *should_free = NULL;
446 if (op_type == IS_CONST) {
447 return RT_CONSTANT(opline, node);
448 } else if (op_type == IS_CV) {
449 return _get_zval_ptr_cv_deref(node.var, type EXECUTE_DATA_CC);
450 } else {
451 return NULL;
452 }
453 }
454 }
455
_get_op_data_zval_ptr_deref_r(int op_type,znode_op node,zend_free_op * should_free EXECUTE_DATA_DC OPLINE_DC)456 static zend_always_inline ZEND_ATTRIBUTE_UNUSED zval *_get_op_data_zval_ptr_deref_r(int op_type, znode_op node, zend_free_op *should_free EXECUTE_DATA_DC OPLINE_DC)
457 {
458 if (op_type & (IS_TMP_VAR|IS_VAR)) {
459 if (op_type == IS_TMP_VAR) {
460 return _get_zval_ptr_tmp(node.var, should_free EXECUTE_DATA_CC);
461 } else {
462 ZEND_ASSERT(op_type == IS_VAR);
463 return _get_zval_ptr_var_deref(node.var, should_free EXECUTE_DATA_CC);
464 }
465 } else {
466 *should_free = NULL;
467 if (op_type == IS_CONST) {
468 return RT_CONSTANT(opline + 1, node);
469 } else if (op_type == IS_CV) {
470 return _get_zval_ptr_cv_deref_BP_VAR_R(node.var EXECUTE_DATA_CC);
471 } else {
472 return NULL;
473 }
474 }
475 }
476
_get_zval_ptr_undef(int op_type,znode_op node,zend_free_op * should_free,int type EXECUTE_DATA_DC OPLINE_DC)477 static zend_always_inline zval *_get_zval_ptr_undef(int op_type, znode_op node, zend_free_op *should_free, int type EXECUTE_DATA_DC OPLINE_DC)
478 {
479 if (op_type & (IS_TMP_VAR|IS_VAR)) {
480 if (!ZEND_DEBUG || op_type == IS_VAR) {
481 return _get_zval_ptr_var(node.var, should_free EXECUTE_DATA_CC);
482 } else {
483 ZEND_ASSERT(op_type == IS_TMP_VAR);
484 return _get_zval_ptr_tmp(node.var, should_free EXECUTE_DATA_CC);
485 }
486 } else {
487 *should_free = NULL;
488 if (op_type == IS_CONST) {
489 return RT_CONSTANT(opline, node);
490 } else if (op_type == IS_CV) {
491 return EX_VAR(node.var);
492 } else {
493 return NULL;
494 }
495 }
496 }
497
_get_zval_ptr_ptr_var(uint32_t var,zend_free_op * should_free EXECUTE_DATA_DC)498 static zend_always_inline zval *_get_zval_ptr_ptr_var(uint32_t var, zend_free_op *should_free EXECUTE_DATA_DC)
499 {
500 zval *ret = EX_VAR(var);
501
502 if (EXPECTED(Z_TYPE_P(ret) == IS_INDIRECT)) {
503 *should_free = NULL;
504 ret = Z_INDIRECT_P(ret);
505 } else {
506 *should_free = ret;
507 }
508 return ret;
509 }
510
_get_zval_ptr_ptr(int op_type,znode_op node,zend_free_op * should_free,int type EXECUTE_DATA_DC)511 static inline zval *_get_zval_ptr_ptr(int op_type, znode_op node, zend_free_op *should_free, int type EXECUTE_DATA_DC)
512 {
513 if (op_type == IS_CV) {
514 *should_free = NULL;
515 return _get_zval_ptr_cv(node.var, type EXECUTE_DATA_CC);
516 } else /* if (op_type == IS_VAR) */ {
517 ZEND_ASSERT(op_type == IS_VAR);
518 return _get_zval_ptr_ptr_var(node.var, should_free EXECUTE_DATA_CC);
519 }
520 }
521
_get_obj_zval_ptr(int op_type,znode_op op,zend_free_op * should_free,int type EXECUTE_DATA_DC OPLINE_DC)522 static inline ZEND_ATTRIBUTE_UNUSED zval *_get_obj_zval_ptr(int op_type, znode_op op, zend_free_op *should_free, int type EXECUTE_DATA_DC OPLINE_DC)
523 {
524 if (op_type == IS_UNUSED) {
525 *should_free = NULL;
526 return &EX(This);
527 }
528 return get_zval_ptr(op_type, op, should_free, type);
529 }
530
_get_obj_zval_ptr_undef(int op_type,znode_op op,zend_free_op * should_free,int type EXECUTE_DATA_DC OPLINE_DC)531 static inline ZEND_ATTRIBUTE_UNUSED zval *_get_obj_zval_ptr_undef(int op_type, znode_op op, zend_free_op *should_free, int type EXECUTE_DATA_DC OPLINE_DC)
532 {
533 if (op_type == IS_UNUSED) {
534 *should_free = NULL;
535 return &EX(This);
536 }
537 return get_zval_ptr_undef(op_type, op, should_free, type);
538 }
539
_get_obj_zval_ptr_ptr(int op_type,znode_op node,zend_free_op * should_free,int type EXECUTE_DATA_DC)540 static inline ZEND_ATTRIBUTE_UNUSED zval *_get_obj_zval_ptr_ptr(int op_type, znode_op node, zend_free_op *should_free, int type EXECUTE_DATA_DC)
541 {
542 if (op_type == IS_UNUSED) {
543 *should_free = NULL;
544 return &EX(This);
545 }
546 return get_zval_ptr_ptr(op_type, node, should_free, type);
547 }
548
zend_assign_to_variable_reference(zval * variable_ptr,zval * value_ptr)549 static inline void zend_assign_to_variable_reference(zval *variable_ptr, zval *value_ptr)
550 {
551 zend_reference *ref;
552
553 if (EXPECTED(!Z_ISREF_P(value_ptr))) {
554 ZVAL_NEW_REF(value_ptr, value_ptr);
555 } else if (UNEXPECTED(variable_ptr == value_ptr)) {
556 return;
557 }
558
559 ref = Z_REF_P(value_ptr);
560 GC_ADDREF(ref);
561 if (Z_REFCOUNTED_P(variable_ptr)) {
562 zend_refcounted *garbage = Z_COUNTED_P(variable_ptr);
563
564 if (GC_DELREF(garbage) == 0) {
565 ZVAL_REF(variable_ptr, ref);
566 rc_dtor_func(garbage);
567 return;
568 } else {
569 gc_check_possible_root(garbage);
570 }
571 }
572 ZVAL_REF(variable_ptr, ref);
573 }
574
zend_assign_to_typed_property_reference(zend_property_info * prop_info,zval * prop,zval * value_ptr EXECUTE_DATA_DC)575 static zend_never_inline zval* zend_assign_to_typed_property_reference(zend_property_info *prop_info, zval *prop, zval *value_ptr EXECUTE_DATA_DC)
576 {
577 if (!zend_verify_prop_assignable_by_ref(prop_info, value_ptr, EX_USES_STRICT_TYPES())) {
578 return &EG(uninitialized_zval);
579 }
580 if (Z_ISREF_P(prop)) {
581 ZEND_REF_DEL_TYPE_SOURCE(Z_REF_P(prop), prop_info);
582 }
583 zend_assign_to_variable_reference(prop, value_ptr);
584 ZEND_REF_ADD_TYPE_SOURCE(Z_REF_P(prop), prop_info);
585 return prop;
586 }
587
zend_wrong_assign_to_variable_reference(zval * variable_ptr,zval * value_ptr OPLINE_DC EXECUTE_DATA_DC)588 static zend_never_inline ZEND_COLD zval *zend_wrong_assign_to_variable_reference(zval *variable_ptr, zval *value_ptr OPLINE_DC EXECUTE_DATA_DC)
589 {
590 zend_error(E_NOTICE, "Only variables should be assigned by reference");
591 if (UNEXPECTED(EG(exception) != NULL)) {
592 return &EG(uninitialized_zval);
593 }
594
595 /* Use IS_TMP_VAR instead of IS_VAR to avoid ISREF check */
596 Z_TRY_ADDREF_P(value_ptr);
597 return zend_assign_to_variable(variable_ptr, value_ptr, IS_TMP_VAR, EX_USES_STRICT_TYPES());
598 }
599
zend_format_type(zend_type type,const char ** part1,const char ** part2)600 static void zend_format_type(zend_type type, const char **part1, const char **part2) {
601 *part1 = ZEND_TYPE_ALLOW_NULL(type) ? "?" : "";
602 if (ZEND_TYPE_IS_CLASS(type)) {
603 if (ZEND_TYPE_IS_CE(type)) {
604 *part2 = ZSTR_VAL(ZEND_TYPE_CE(type)->name);
605 } else {
606 *part2 = ZSTR_VAL(ZEND_TYPE_NAME(type));
607 }
608 } else {
609 *part2 = zend_get_type_by_const(ZEND_TYPE_CODE(type));
610 }
611 }
612
zend_throw_auto_init_in_prop_error(zend_property_info * prop,const char * type)613 static zend_never_inline ZEND_COLD void zend_throw_auto_init_in_prop_error(zend_property_info *prop, const char *type) {
614 const char *prop_type1, *prop_type2;
615 zend_format_type(prop->type, &prop_type1, &prop_type2);
616 zend_type_error(
617 "Cannot auto-initialize an %s inside property %s::$%s of type %s%s",
618 type,
619 ZSTR_VAL(prop->ce->name), zend_get_unmangled_property_name(prop->name),
620 prop_type1, prop_type2
621 );
622 }
623
zend_throw_auto_init_in_ref_error(zend_property_info * prop,const char * type)624 static zend_never_inline ZEND_COLD void zend_throw_auto_init_in_ref_error(zend_property_info *prop, const char *type) {
625 const char *prop_type1, *prop_type2;
626 zend_format_type(prop->type, &prop_type1, &prop_type2);
627 zend_type_error(
628 "Cannot auto-initialize an %s inside a reference held by property %s::$%s of type %s%s",
629 type,
630 ZSTR_VAL(prop->ce->name), zend_get_unmangled_property_name(prop->name),
631 prop_type1, prop_type2
632 );
633 }
634
zend_throw_access_uninit_prop_by_ref_error(zend_property_info * prop)635 static zend_never_inline ZEND_COLD void zend_throw_access_uninit_prop_by_ref_error(
636 zend_property_info *prop) {
637 zend_throw_error(NULL,
638 "Cannot access uninitialized non-nullable property %s::$%s by reference",
639 ZSTR_VAL(prop->ce->name),
640 zend_get_unmangled_property_name(prop->name));
641 }
642
643 static zend_never_inline zend_bool zend_verify_ref_stdClass_assignable(zend_reference *ref);
644 static zend_never_inline zend_bool zend_verify_ref_array_assignable(zend_reference *ref);
645
646 /* this should modify object only if it's empty */
make_real_object(zval * object,zval * property OPLINE_DC EXECUTE_DATA_DC)647 static zend_never_inline ZEND_COLD zval* ZEND_FASTCALL make_real_object(zval *object, zval *property OPLINE_DC EXECUTE_DATA_DC)
648 {
649 zend_object *obj;
650 zval *ref = NULL;
651 if (Z_ISREF_P(object)) {
652 ref = object;
653 object = Z_REFVAL_P(object);
654 }
655
656 if (UNEXPECTED(Z_TYPE_P(object) > IS_FALSE &&
657 (Z_TYPE_P(object) != IS_STRING || Z_STRLEN_P(object) != 0))) {
658 if (opline->op1_type != IS_VAR || EXPECTED(!Z_ISERROR_P(object))) {
659 zend_string *tmp_property_name;
660 zend_string *property_name = zval_get_tmp_string(property, &tmp_property_name);
661
662 if (opline->opcode == ZEND_PRE_INC_OBJ
663 || opline->opcode == ZEND_PRE_DEC_OBJ
664 || opline->opcode == ZEND_POST_INC_OBJ
665 || opline->opcode == ZEND_POST_DEC_OBJ) {
666 zend_error(E_WARNING, "Attempt to increment/decrement property '%s' of non-object", ZSTR_VAL(property_name));
667 } else if (opline->opcode == ZEND_FETCH_OBJ_W
668 || opline->opcode == ZEND_FETCH_OBJ_RW
669 || opline->opcode == ZEND_FETCH_OBJ_FUNC_ARG
670 || opline->opcode == ZEND_ASSIGN_OBJ_REF) {
671 zend_error(E_WARNING, "Attempt to modify property '%s' of non-object", ZSTR_VAL(property_name));
672 } else {
673 zend_error(E_WARNING, "Attempt to assign property '%s' of non-object", ZSTR_VAL(property_name));
674 }
675 zend_tmp_string_release(tmp_property_name);
676 }
677 if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
678 ZVAL_NULL(EX_VAR(opline->result.var));
679 }
680 return NULL;
681 }
682
683 if (ref && ZEND_REF_HAS_TYPE_SOURCES(Z_REF_P(ref))) {
684 if (UNEXPECTED(!zend_verify_ref_stdClass_assignable(Z_REF_P(ref)))) {
685 if (RETURN_VALUE_USED(opline)) {
686 ZVAL_UNDEF(EX_VAR(opline->result.var));
687 }
688 return NULL;
689 }
690 }
691
692 zval_ptr_dtor_nogc(object);
693 object_init(object);
694 Z_ADDREF_P(object);
695 obj = Z_OBJ_P(object);
696 zend_error(E_WARNING, "Creating default object from empty value");
697 if (GC_REFCOUNT(obj) == 1) {
698 /* the enclosing container was deleted, obj is unreferenced */
699 OBJ_RELEASE(obj);
700 if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
701 ZVAL_NULL(EX_VAR(opline->result.var));
702 }
703 return NULL;
704 }
705 Z_DELREF_P(object);
706 return object;
707 }
708
zend_verify_type_error_common(const zend_function * zf,const zend_arg_info * arg_info,const zend_class_entry * ce,zval * value,const char ** fname,const char ** fsep,const char ** fclass,const char ** need_msg,const char ** need_kind,const char ** need_or_null,const char ** given_msg,const char ** given_kind)709 static ZEND_COLD void zend_verify_type_error_common(
710 const zend_function *zf, const zend_arg_info *arg_info,
711 const zend_class_entry *ce, zval *value,
712 const char **fname, const char **fsep, const char **fclass,
713 const char **need_msg, const char **need_kind, const char **need_or_null,
714 const char **given_msg, const char **given_kind)
715 {
716 zend_bool is_interface = 0;
717 *fname = ZSTR_VAL(zf->common.function_name);
718 if (zf->common.scope) {
719 *fsep = "::";
720 *fclass = ZSTR_VAL(zf->common.scope->name);
721 } else {
722 *fsep = "";
723 *fclass = "";
724 }
725
726 if (ZEND_TYPE_IS_CLASS(arg_info->type)) {
727 if (ce) {
728 if (ce->ce_flags & ZEND_ACC_INTERFACE) {
729 *need_msg = "implement interface ";
730 is_interface = 1;
731 } else {
732 *need_msg = "be an instance of ";
733 }
734 *need_kind = ZSTR_VAL(ce->name);
735 } else {
736 /* We don't know whether it's a class or interface, assume it's a class */
737
738 *need_msg = "be an instance of ";
739 *need_kind = ZSTR_VAL(ZEND_TYPE_NAME(arg_info->type));
740 }
741 } else {
742 switch (ZEND_TYPE_CODE(arg_info->type)) {
743 case IS_OBJECT:
744 *need_msg = "be an ";
745 *need_kind = "object";
746 break;
747 case IS_CALLABLE:
748 *need_msg = "be callable";
749 *need_kind = "";
750 break;
751 case IS_ITERABLE:
752 *need_msg = "be iterable";
753 *need_kind = "";
754 break;
755 default:
756 *need_msg = "be of the type ";
757 *need_kind = zend_get_type_by_const(ZEND_TYPE_CODE(arg_info->type));
758 break;
759 }
760 }
761
762 if (ZEND_TYPE_ALLOW_NULL(arg_info->type)) {
763 *need_or_null = is_interface ? " or be null" : " or null";
764 } else {
765 *need_or_null = "";
766 }
767
768 if (value) {
769 if (ZEND_TYPE_IS_CLASS(arg_info->type) && Z_TYPE_P(value) == IS_OBJECT) {
770 *given_msg = "instance of ";
771 *given_kind = ZSTR_VAL(Z_OBJCE_P(value)->name);
772 } else {
773 *given_msg = zend_zval_type_name(value);
774 *given_kind = "";
775 }
776 } else {
777 *given_msg = "none";
778 *given_kind = "";
779 }
780 }
781
zend_verify_arg_error(const zend_function * zf,const zend_arg_info * arg_info,int arg_num,const zend_class_entry * ce,zval * value)782 static ZEND_COLD void zend_verify_arg_error(
783 const zend_function *zf, const zend_arg_info *arg_info,
784 int arg_num, const zend_class_entry *ce, zval *value)
785 {
786 zend_execute_data *ptr = EG(current_execute_data)->prev_execute_data;
787 const char *fname, *fsep, *fclass;
788 const char *need_msg, *need_kind, *need_or_null, *given_msg, *given_kind;
789
790 if (EG(exception)) {
791 /* The type verification itself might have already thrown an exception
792 * through a promoted warning. */
793 return;
794 }
795
796 if (value) {
797 zend_verify_type_error_common(
798 zf, arg_info, ce, value,
799 &fname, &fsep, &fclass, &need_msg, &need_kind, &need_or_null, &given_msg, &given_kind);
800
801 if (zf->common.type == ZEND_USER_FUNCTION) {
802 if (ptr && ptr->func && ZEND_USER_CODE(ptr->func->common.type)) {
803 zend_type_error("Argument %d passed to %s%s%s() must %s%s%s, %s%s given, called in %s on line %d",
804 arg_num, fclass, fsep, fname, need_msg, need_kind, need_or_null, given_msg, given_kind,
805 ZSTR_VAL(ptr->func->op_array.filename), ptr->opline->lineno);
806 } else {
807 zend_type_error("Argument %d passed to %s%s%s() must %s%s%s, %s%s given", arg_num, fclass, fsep, fname, need_msg, need_kind, need_or_null, given_msg, given_kind);
808 }
809 } else {
810 zend_type_error("Argument %d passed to %s%s%s() must %s%s%s, %s%s given", arg_num, fclass, fsep, fname, need_msg, need_kind, need_or_null, given_msg, given_kind);
811 }
812 } else {
813 zend_missing_arg_error(ptr);
814 }
815 }
816
is_null_constant(zend_class_entry * scope,zval * default_value)817 static int is_null_constant(zend_class_entry *scope, zval *default_value)
818 {
819 if (Z_TYPE_P(default_value) == IS_CONSTANT_AST) {
820 zval constant;
821
822 ZVAL_COPY(&constant, default_value);
823 if (UNEXPECTED(zval_update_constant_ex(&constant, scope) != SUCCESS)) {
824 return 0;
825 }
826 if (Z_TYPE(constant) == IS_NULL) {
827 return 1;
828 }
829 zval_ptr_dtor_nogc(&constant);
830 }
831 return 0;
832 }
833
zend_verify_weak_scalar_type_hint(zend_uchar type_hint,zval * arg)834 static zend_bool zend_verify_weak_scalar_type_hint(zend_uchar type_hint, zval *arg)
835 {
836 switch (type_hint) {
837 case _IS_BOOL: {
838 zend_bool dest;
839
840 if (!zend_parse_arg_bool_weak(arg, &dest)) {
841 return 0;
842 }
843 zval_ptr_dtor(arg);
844 ZVAL_BOOL(arg, dest);
845 return 1;
846 }
847 case IS_LONG: {
848 zend_long dest;
849
850 if (!zend_parse_arg_long_weak(arg, &dest)) {
851 return 0;
852 }
853 zval_ptr_dtor(arg);
854 ZVAL_LONG(arg, dest);
855 return 1;
856 }
857 case IS_DOUBLE: {
858 double dest;
859
860 if (!zend_parse_arg_double_weak(arg, &dest)) {
861 return 0;
862 }
863 zval_ptr_dtor(arg);
864 ZVAL_DOUBLE(arg, dest);
865 return 1;
866 }
867 case IS_STRING: {
868 zend_string *dest;
869
870 /* on success "arg" is converted to IS_STRING */
871 return zend_parse_arg_str_weak(arg, &dest);
872 }
873 default:
874 return 0;
875 }
876 }
877
zend_verify_scalar_type_hint(zend_uchar type_hint,zval * arg,zend_bool strict)878 static zend_bool zend_verify_scalar_type_hint(zend_uchar type_hint, zval *arg, zend_bool strict)
879 {
880 if (UNEXPECTED(strict)) {
881 /* SSTH Exception: IS_LONG may be accepted as IS_DOUBLE (converted) */
882 if (type_hint != IS_DOUBLE || Z_TYPE_P(arg) != IS_LONG) {
883 return 0;
884 }
885 } else if (UNEXPECTED(Z_TYPE_P(arg) == IS_NULL)) {
886 /* NULL may be accepted only by nullable hints (this is already checked) */
887 return 0;
888 }
889 return zend_verify_weak_scalar_type_hint(type_hint, arg);
890 }
891
zend_verify_property_type_error(zend_property_info * info,zval * property)892 ZEND_COLD zend_never_inline void zend_verify_property_type_error(zend_property_info *info, zval *property)
893 {
894 const char *prop_type1, *prop_type2;
895
896 /* we _may_ land here in case reading already errored and runtime cache thus has not been updated (i.e. it contains a valid but unrelated info) */
897 if (EG(exception)) {
898 return;
899 }
900
901 // TODO Switch to a more standard error message?
902 zend_format_type(info->type, &prop_type1, &prop_type2);
903 (void) prop_type1;
904 if (ZEND_TYPE_IS_CLASS(info->type)) {
905 zend_type_error("Typed property %s::$%s must be an instance of %s%s, %s used",
906 ZSTR_VAL(info->ce->name),
907 zend_get_unmangled_property_name(info->name),
908 prop_type2,
909 ZEND_TYPE_ALLOW_NULL(info->type) ? " or null" : "",
910 Z_TYPE_P(property) == IS_OBJECT ? ZSTR_VAL(Z_OBJCE_P(property)->name) : zend_get_type_by_const(Z_TYPE_P(property)));
911 } else {
912 zend_type_error("Typed property %s::$%s must be %s%s, %s used",
913 ZSTR_VAL(info->ce->name),
914 zend_get_unmangled_property_name(info->name),
915 prop_type2,
916 ZEND_TYPE_ALLOW_NULL(info->type) ? " or null" : "",
917 Z_TYPE_P(property) == IS_OBJECT ? ZSTR_VAL(Z_OBJCE_P(property)->name) : zend_get_type_by_const(Z_TYPE_P(property)));
918 }
919 }
920
zend_resolve_class_type(zend_type * type,zend_class_entry * self_ce)921 static zend_bool zend_resolve_class_type(zend_type *type, zend_class_entry *self_ce) {
922 zend_class_entry *ce;
923 zend_string *name = ZEND_TYPE_NAME(*type);
924 if (zend_string_equals_literal_ci(name, "self")) {
925 /* We need to explicitly check for this here, to avoid updating the type in the trait and
926 * later using the wrong "self" when the trait is used in a class. */
927 if (UNEXPECTED((self_ce->ce_flags & ZEND_ACC_TRAIT) != 0)) {
928 zend_throw_error(NULL, "Cannot write a%s value to a 'self' typed static property of a trait", ZEND_TYPE_ALLOW_NULL(*type) ? " non-null" : "");
929 return 0;
930 }
931 ce = self_ce;
932 } else if (zend_string_equals_literal_ci(name, "parent")) {
933 if (UNEXPECTED(!self_ce->parent)) {
934 zend_throw_error(NULL, "Cannot access parent:: when current class scope has no parent");
935 return 0;
936 }
937 ce = self_ce->parent;
938 } else {
939 ce = zend_lookup_class_ex(name, NULL, ZEND_FETCH_CLASS_NO_AUTOLOAD);
940 if (UNEXPECTED(!ce)) {
941 return 0;
942 }
943 }
944
945 zend_string_release(name);
946 *type = ZEND_TYPE_ENCODE_CE(ce, ZEND_TYPE_ALLOW_NULL(*type));
947 return 1;
948 }
949
950
i_zend_check_property_type(zend_property_info * info,zval * property,zend_bool strict)951 static zend_always_inline zend_bool i_zend_check_property_type(zend_property_info *info, zval *property, zend_bool strict)
952 {
953 ZEND_ASSERT(!Z_ISREF_P(property));
954 if (ZEND_TYPE_IS_CLASS(info->type)) {
955 if (UNEXPECTED(Z_TYPE_P(property) != IS_OBJECT)) {
956 return Z_TYPE_P(property) == IS_NULL && ZEND_TYPE_ALLOW_NULL(info->type);
957 }
958
959 if (UNEXPECTED(!ZEND_TYPE_IS_CE(info->type)) && UNEXPECTED(!zend_resolve_class_type(&info->type, info->ce))) {
960 return 0;
961 }
962
963 return instanceof_function(Z_OBJCE_P(property), ZEND_TYPE_CE(info->type));
964 }
965
966 ZEND_ASSERT(ZEND_TYPE_CODE(info->type) != IS_CALLABLE);
967 if (EXPECTED(ZEND_TYPE_CODE(info->type) == Z_TYPE_P(property))) {
968 return 1;
969 } else if (EXPECTED(Z_TYPE_P(property) == IS_NULL)) {
970 return ZEND_TYPE_ALLOW_NULL(info->type);
971 } else if (ZEND_TYPE_CODE(info->type) == _IS_BOOL && EXPECTED(Z_TYPE_P(property) == IS_FALSE || Z_TYPE_P(property) == IS_TRUE)) {
972 return 1;
973 } else if (ZEND_TYPE_CODE(info->type) == IS_ITERABLE) {
974 return zend_is_iterable(property);
975 } else {
976 return zend_verify_scalar_type_hint(ZEND_TYPE_CODE(info->type), property, strict);
977 }
978 }
979
i_zend_verify_property_type(zend_property_info * info,zval * property,zend_bool strict)980 static zend_bool zend_always_inline i_zend_verify_property_type(zend_property_info *info, zval *property, zend_bool strict)
981 {
982 if (i_zend_check_property_type(info, property, strict)) {
983 return 1;
984 }
985
986 zend_verify_property_type_error(info, property);
987 return 0;
988 }
989
zend_verify_property_type(zend_property_info * info,zval * property,zend_bool strict)990 zend_bool zend_never_inline zend_verify_property_type(zend_property_info *info, zval *property, zend_bool strict) {
991 return i_zend_verify_property_type(info, property, strict);
992 }
993
zend_assign_to_typed_prop(zend_property_info * info,zval * property_val,zval * value EXECUTE_DATA_DC)994 static zend_never_inline zval* zend_assign_to_typed_prop(zend_property_info *info, zval *property_val, zval *value EXECUTE_DATA_DC)
995 {
996 zval tmp;
997
998 ZVAL_DEREF(value);
999 ZVAL_COPY(&tmp, value);
1000
1001 if (UNEXPECTED(!i_zend_verify_property_type(info, &tmp, EX_USES_STRICT_TYPES()))) {
1002 zval_ptr_dtor(&tmp);
1003 return &EG(uninitialized_zval);
1004 }
1005
1006 return zend_assign_to_variable(property_val, &tmp, IS_TMP_VAR, EX_USES_STRICT_TYPES());
1007 }
1008
1009
zend_check_type(zend_type type,zval * arg,zend_class_entry ** ce,void ** cache_slot,zval * default_value,zend_class_entry * scope,zend_bool is_return_type)1010 static zend_always_inline zend_bool zend_check_type(
1011 zend_type type,
1012 zval *arg, zend_class_entry **ce, void **cache_slot,
1013 zval *default_value, zend_class_entry *scope,
1014 zend_bool is_return_type)
1015 {
1016 zend_reference *ref = NULL;
1017
1018 if (!ZEND_TYPE_IS_SET(type)) {
1019 return 1;
1020 }
1021
1022 if (UNEXPECTED(Z_ISREF_P(arg))) {
1023 ref = Z_REF_P(arg);
1024 arg = Z_REFVAL_P(arg);
1025 }
1026
1027 if (ZEND_TYPE_IS_CLASS(type)) {
1028 if (EXPECTED(*cache_slot)) {
1029 *ce = (zend_class_entry *) *cache_slot;
1030 } else {
1031 *ce = zend_fetch_class(ZEND_TYPE_NAME(type), (ZEND_FETCH_CLASS_AUTO | ZEND_FETCH_CLASS_NO_AUTOLOAD));
1032 if (UNEXPECTED(!*ce)) {
1033 return Z_TYPE_P(arg) == IS_NULL && (ZEND_TYPE_ALLOW_NULL(type) || (default_value && is_null_constant(scope, default_value)));
1034 }
1035 *cache_slot = (void *) *ce;
1036 }
1037 if (EXPECTED(Z_TYPE_P(arg) == IS_OBJECT)) {
1038 return instanceof_function(Z_OBJCE_P(arg), *ce);
1039 }
1040 return Z_TYPE_P(arg) == IS_NULL && (ZEND_TYPE_ALLOW_NULL(type) || (default_value && is_null_constant(scope, default_value)));
1041 } else if (EXPECTED(ZEND_TYPE_CODE(type) == Z_TYPE_P(arg))) {
1042 return 1;
1043 }
1044
1045 if (Z_TYPE_P(arg) == IS_NULL && (ZEND_TYPE_ALLOW_NULL(type) || (default_value && is_null_constant(scope, default_value)))) {
1046 /* Null passed to nullable type */
1047 return 1;
1048 }
1049
1050 if (ZEND_TYPE_CODE(type) == IS_CALLABLE) {
1051 return zend_is_callable(arg, IS_CALLABLE_CHECK_SILENT, NULL);
1052 } else if (ZEND_TYPE_CODE(type) == IS_ITERABLE) {
1053 return zend_is_iterable(arg);
1054 } else if (ZEND_TYPE_CODE(type) == _IS_BOOL &&
1055 EXPECTED(Z_TYPE_P(arg) == IS_FALSE || Z_TYPE_P(arg) == IS_TRUE)) {
1056 return 1;
1057 } else if (ref && ZEND_REF_HAS_TYPE_SOURCES(ref)) {
1058 return 0; /* we cannot have conversions for typed refs */
1059 } else {
1060 return zend_verify_scalar_type_hint(ZEND_TYPE_CODE(type), arg,
1061 is_return_type ? ZEND_RET_USES_STRICT_TYPES() : ZEND_ARG_USES_STRICT_TYPES());
1062 }
1063
1064 /* Special handling for IS_VOID is not necessary (for return types),
1065 * because this case is already checked at compile-time. */
1066 }
1067
zend_verify_arg_type(zend_function * zf,uint32_t arg_num,zval * arg,zval * default_value,void ** cache_slot)1068 static zend_always_inline int zend_verify_arg_type(zend_function *zf, uint32_t arg_num, zval *arg, zval *default_value, void **cache_slot)
1069 {
1070 zend_arg_info *cur_arg_info;
1071 zend_class_entry *ce;
1072
1073 if (EXPECTED(arg_num <= zf->common.num_args)) {
1074 cur_arg_info = &zf->common.arg_info[arg_num-1];
1075 } else if (UNEXPECTED(zf->common.fn_flags & ZEND_ACC_VARIADIC)) {
1076 cur_arg_info = &zf->common.arg_info[zf->common.num_args];
1077 } else {
1078 return 1;
1079 }
1080
1081 ce = NULL;
1082 if (UNEXPECTED(!zend_check_type(cur_arg_info->type, arg, &ce, cache_slot, default_value, zf->common.scope, 0))) {
1083 zend_verify_arg_error(zf, cur_arg_info, arg_num, ce, arg);
1084 return 0;
1085 }
1086
1087 return 1;
1088 }
1089
zend_verify_recv_arg_type(zend_function * zf,uint32_t arg_num,zval * arg,zval * default_value,void ** cache_slot)1090 static zend_always_inline int zend_verify_recv_arg_type(zend_function *zf, uint32_t arg_num, zval *arg, zval *default_value, void **cache_slot)
1091 {
1092 zend_arg_info *cur_arg_info = &zf->common.arg_info[arg_num-1];
1093 zend_class_entry *ce;
1094
1095 ZEND_ASSERT(arg_num <= zf->common.num_args);
1096 cur_arg_info = &zf->common.arg_info[arg_num-1];
1097
1098 ce = NULL;
1099 if (UNEXPECTED(!zend_check_type(cur_arg_info->type, arg, &ce, cache_slot, default_value, zf->common.scope, 0))) {
1100 zend_verify_arg_error(zf, cur_arg_info, arg_num, ce, arg);
1101 return 0;
1102 }
1103
1104 return 1;
1105 }
1106
zend_verify_variadic_arg_type(zend_function * zf,uint32_t arg_num,zval * arg,zval * default_value,void ** cache_slot)1107 static zend_always_inline int zend_verify_variadic_arg_type(zend_function *zf, uint32_t arg_num, zval *arg, zval *default_value, void **cache_slot)
1108 {
1109 zend_arg_info *cur_arg_info;
1110 zend_class_entry *ce;
1111
1112 ZEND_ASSERT(arg_num > zf->common.num_args);
1113 ZEND_ASSERT(zf->common.fn_flags & ZEND_ACC_VARIADIC);
1114 cur_arg_info = &zf->common.arg_info[zf->common.num_args];
1115
1116 ce = NULL;
1117 if (UNEXPECTED(!zend_check_type(cur_arg_info->type, arg, &ce, cache_slot, default_value, zf->common.scope, 0))) {
1118 zend_verify_arg_error(zf, cur_arg_info, arg_num, ce, arg);
1119 return 0;
1120 }
1121
1122 return 1;
1123 }
1124
zend_verify_internal_arg_types(zend_function * fbc,zend_execute_data * call)1125 static zend_never_inline int zend_verify_internal_arg_types(zend_function *fbc, zend_execute_data *call)
1126 {
1127 uint32_t i;
1128 uint32_t num_args = ZEND_CALL_NUM_ARGS(call);
1129 zval *p = ZEND_CALL_ARG(call, 1);
1130 void *dummy_cache_slot;
1131
1132 for (i = 0; i < num_args; ++i) {
1133 dummy_cache_slot = NULL;
1134 if (UNEXPECTED(!zend_verify_arg_type(fbc, i + 1, p, NULL, &dummy_cache_slot))) {
1135 EG(current_execute_data) = call->prev_execute_data;
1136 return 0;
1137 }
1138 p++;
1139 }
1140 return 1;
1141 }
1142
zend_missing_arg_error(zend_execute_data * execute_data)1143 ZEND_API ZEND_COLD void ZEND_FASTCALL zend_missing_arg_error(zend_execute_data *execute_data)
1144 {
1145 zend_execute_data *ptr = EX(prev_execute_data);
1146
1147 if (ptr && ptr->func && ZEND_USER_CODE(ptr->func->common.type)) {
1148 zend_throw_error(zend_ce_argument_count_error, "Too few arguments to function %s%s%s(), %d passed in %s on line %d and %s %d expected",
1149 EX(func)->common.scope ? ZSTR_VAL(EX(func)->common.scope->name) : "",
1150 EX(func)->common.scope ? "::" : "",
1151 ZSTR_VAL(EX(func)->common.function_name),
1152 EX_NUM_ARGS(),
1153 ZSTR_VAL(ptr->func->op_array.filename),
1154 ptr->opline->lineno,
1155 EX(func)->common.required_num_args == EX(func)->common.num_args ? "exactly" : "at least",
1156 EX(func)->common.required_num_args);
1157 } else {
1158 zend_throw_error(zend_ce_argument_count_error, "Too few arguments to function %s%s%s(), %d passed and %s %d expected",
1159 EX(func)->common.scope ? ZSTR_VAL(EX(func)->common.scope->name) : "",
1160 EX(func)->common.scope ? "::" : "",
1161 ZSTR_VAL(EX(func)->common.function_name),
1162 EX_NUM_ARGS(),
1163 EX(func)->common.required_num_args == EX(func)->common.num_args ? "exactly" : "at least",
1164 EX(func)->common.required_num_args);
1165 }
1166 }
1167
zend_verify_return_error(const zend_function * zf,const zend_class_entry * ce,zval * value)1168 static ZEND_COLD void zend_verify_return_error(
1169 const zend_function *zf, const zend_class_entry *ce, zval *value)
1170 {
1171 const zend_arg_info *arg_info = &zf->common.arg_info[-1];
1172 const char *fname, *fsep, *fclass;
1173 const char *need_msg, *need_kind, *need_or_null, *given_msg, *given_kind;
1174
1175 zend_verify_type_error_common(
1176 zf, arg_info, ce, value,
1177 &fname, &fsep, &fclass, &need_msg, &need_kind, &need_or_null, &given_msg, &given_kind);
1178
1179 zend_type_error("Return value of %s%s%s() must %s%s%s, %s%s returned",
1180 fclass, fsep, fname, need_msg, need_kind, need_or_null, given_msg, given_kind);
1181 }
1182
1183 #if ZEND_DEBUG
zend_verify_internal_return_error(const zend_function * zf,const zend_class_entry * ce,zval * value)1184 static ZEND_COLD void zend_verify_internal_return_error(
1185 const zend_function *zf, const zend_class_entry *ce, zval *value)
1186 {
1187 const zend_arg_info *arg_info = &zf->common.arg_info[-1];
1188 const char *fname, *fsep, *fclass;
1189 const char *need_msg, *need_kind, *need_or_null, *given_msg, *given_kind;
1190
1191 zend_verify_type_error_common(
1192 zf, arg_info, ce, value,
1193 &fname, &fsep, &fclass, &need_msg, &need_kind, &need_or_null, &given_msg, &given_kind);
1194
1195 zend_error_noreturn(E_CORE_ERROR, "Return value of %s%s%s() must %s%s%s, %s%s returned",
1196 fclass, fsep, fname, need_msg, need_kind, need_or_null, given_msg, given_kind);
1197 }
1198
zend_verify_void_return_error(const zend_function * zf,const char * returned_msg,const char * returned_kind)1199 static ZEND_COLD void zend_verify_void_return_error(const zend_function *zf, const char *returned_msg, const char *returned_kind)
1200 {
1201 const char *fname = ZSTR_VAL(zf->common.function_name);
1202 const char *fsep;
1203 const char *fclass;
1204
1205 if (zf->common.scope) {
1206 fsep = "::";
1207 fclass = ZSTR_VAL(zf->common.scope->name);
1208 } else {
1209 fsep = "";
1210 fclass = "";
1211 }
1212
1213 zend_type_error("%s%s%s() must not return a value, %s%s returned",
1214 fclass, fsep, fname, returned_msg, returned_kind);
1215 }
1216
zend_verify_internal_return_type(zend_function * zf,zval * ret)1217 static int zend_verify_internal_return_type(zend_function *zf, zval *ret)
1218 {
1219 zend_internal_arg_info *ret_info = zf->internal_function.arg_info - 1;
1220 zend_class_entry *ce = NULL;
1221 void *dummy_cache_slot = NULL;
1222
1223 if (ZEND_TYPE_CODE(ret_info->type) == IS_VOID) {
1224 if (UNEXPECTED(Z_TYPE_P(ret) != IS_NULL)) {
1225 zend_verify_void_return_error(zf, zend_zval_type_name(ret), "");
1226 return 0;
1227 }
1228 return 1;
1229 }
1230
1231 if (UNEXPECTED(!zend_check_type(ret_info->type, ret, &ce, &dummy_cache_slot, NULL, NULL, 1))) {
1232 zend_verify_internal_return_error(zf, ce, ret);
1233 return 0;
1234 }
1235
1236 return 1;
1237 }
1238 #endif
1239
zend_verify_return_type(zend_function * zf,zval * ret,void ** cache_slot)1240 static zend_always_inline void zend_verify_return_type(zend_function *zf, zval *ret, void **cache_slot)
1241 {
1242 zend_arg_info *ret_info = zf->common.arg_info - 1;
1243 zend_class_entry *ce = NULL;
1244
1245 if (UNEXPECTED(!zend_check_type(ret_info->type, ret, &ce, cache_slot, NULL, NULL, 1))) {
1246 zend_verify_return_error(zf, ce, ret);
1247 }
1248 }
1249
zend_verify_missing_return_type(const zend_function * zf,void ** cache_slot)1250 static ZEND_COLD int zend_verify_missing_return_type(const zend_function *zf, void **cache_slot)
1251 {
1252 zend_arg_info *ret_info = zf->common.arg_info - 1;
1253
1254 if (ZEND_TYPE_IS_SET(ret_info->type) && UNEXPECTED(ZEND_TYPE_CODE(ret_info->type) != IS_VOID)) {
1255 zend_class_entry *ce = NULL;
1256 if (ZEND_TYPE_IS_CLASS(ret_info->type)) {
1257 if (EXPECTED(*cache_slot)) {
1258 ce = (zend_class_entry*) *cache_slot;
1259 } else {
1260 ce = zend_fetch_class(ZEND_TYPE_NAME(ret_info->type), (ZEND_FETCH_CLASS_AUTO | ZEND_FETCH_CLASS_NO_AUTOLOAD));
1261 if (ce) {
1262 *cache_slot = (void*)ce;
1263 }
1264 }
1265 }
1266 zend_verify_return_error(zf, ce, NULL);
1267 return 0;
1268 }
1269 return 1;
1270 }
1271
zend_use_object_as_array(void)1272 static zend_never_inline ZEND_COLD void ZEND_FASTCALL zend_use_object_as_array(void)
1273 {
1274 zend_throw_error(NULL, "Cannot use object as array");
1275 }
1276
zend_illegal_offset(void)1277 static zend_never_inline ZEND_COLD void ZEND_FASTCALL zend_illegal_offset(void)
1278 {
1279 zend_error(E_WARNING, "Illegal offset type");
1280 }
1281
zend_assign_to_object_dim(zval * object,zval * dim,zval * value OPLINE_DC EXECUTE_DATA_DC)1282 static zend_never_inline void zend_assign_to_object_dim(zval *object, zval *dim, zval *value OPLINE_DC EXECUTE_DATA_DC)
1283 {
1284 Z_OBJ_HT_P(object)->write_dimension(object, dim, value);
1285
1286 if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
1287 ZVAL_COPY(EX_VAR(opline->result.var), value);
1288 }
1289 }
1290
zend_binary_op(zval * ret,zval * op1,zval * op2 OPLINE_DC)1291 static zend_always_inline int zend_binary_op(zval *ret, zval *op1, zval *op2 OPLINE_DC)
1292 {
1293 static const binary_op_type zend_binary_ops[] = {
1294 add_function,
1295 sub_function,
1296 mul_function,
1297 div_function,
1298 mod_function,
1299 shift_left_function,
1300 shift_right_function,
1301 concat_function,
1302 bitwise_or_function,
1303 bitwise_and_function,
1304 bitwise_xor_function,
1305 pow_function
1306 };
1307 /* size_t cast makes GCC to better optimize 64-bit PIC code */
1308 size_t opcode = (size_t)opline->extended_value;
1309
1310 return zend_binary_ops[opcode - ZEND_ADD](ret, op1, op2);
1311 }
1312
zend_binary_assign_op_obj_dim(zval * object,zval * property OPLINE_DC EXECUTE_DATA_DC)1313 static zend_never_inline void zend_binary_assign_op_obj_dim(zval *object, zval *property OPLINE_DC EXECUTE_DATA_DC)
1314 {
1315 zend_free_op free_op_data1;
1316 zval *value;
1317 zval *z;
1318 zval rv, res;
1319
1320 value = get_op_data_zval_ptr_r((opline+1)->op1_type, (opline+1)->op1, &free_op_data1);
1321 if ((z = Z_OBJ_HT_P(object)->read_dimension(object, property, BP_VAR_R, &rv)) != NULL) {
1322
1323 if (Z_TYPE_P(z) == IS_OBJECT && Z_OBJ_HT_P(z)->get) {
1324 zval rv2;
1325 zval *value = Z_OBJ_HT_P(z)->get(z, &rv2);
1326
1327 if (z == &rv) {
1328 zval_ptr_dtor(&rv);
1329 }
1330 ZVAL_COPY_VALUE(z, value);
1331 }
1332 if (zend_binary_op(&res, z, value OPLINE_CC) == SUCCESS) {
1333 Z_OBJ_HT_P(object)->write_dimension(object, property, &res);
1334 }
1335 if (z == &rv) {
1336 zval_ptr_dtor(&rv);
1337 }
1338 if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
1339 ZVAL_COPY(EX_VAR(opline->result.var), &res);
1340 }
1341 zval_ptr_dtor(&res);
1342 } else {
1343 zend_use_object_as_array();
1344 if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
1345 ZVAL_NULL(EX_VAR(opline->result.var));
1346 }
1347 }
1348 FREE_OP(free_op_data1);
1349 }
1350
zend_binary_assign_op_typed_ref(zend_reference * ref,zval * value OPLINE_DC EXECUTE_DATA_DC)1351 static zend_never_inline void zend_binary_assign_op_typed_ref(zend_reference *ref, zval *value OPLINE_DC EXECUTE_DATA_DC)
1352 {
1353 zval z_copy;
1354
1355 /* Make sure that in-place concatenation is used if the LHS is a string. */
1356 if (opline->extended_value == ZEND_CONCAT && Z_TYPE(ref->val) == IS_STRING) {
1357 concat_function(&ref->val, &ref->val, value);
1358 ZEND_ASSERT(Z_TYPE(ref->val) == IS_STRING && "Concat should return string");
1359 return;
1360 }
1361
1362 zend_binary_op(&z_copy, &ref->val, value OPLINE_CC);
1363 if (EXPECTED(zend_verify_ref_assignable_zval(ref, &z_copy, EX_USES_STRICT_TYPES()))) {
1364 zval_ptr_dtor(&ref->val);
1365 ZVAL_COPY_VALUE(&ref->val, &z_copy);
1366 } else {
1367 zval_ptr_dtor(&z_copy);
1368 }
1369 }
1370
zend_binary_assign_op_typed_prop(zend_property_info * prop_info,zval * zptr,zval * value OPLINE_DC EXECUTE_DATA_DC)1371 static zend_never_inline void zend_binary_assign_op_typed_prop(zend_property_info *prop_info, zval *zptr, zval *value OPLINE_DC EXECUTE_DATA_DC)
1372 {
1373 zval z_copy;
1374
1375 /* Make sure that in-place concatenation is used if the LHS is a string. */
1376 if (opline->extended_value == ZEND_CONCAT && Z_TYPE_P(zptr) == IS_STRING) {
1377 concat_function(zptr, zptr, value);
1378 ZEND_ASSERT(Z_TYPE_P(zptr) == IS_STRING && "Concat should return string");
1379 return;
1380 }
1381
1382 zend_binary_op(&z_copy, zptr, value OPLINE_CC);
1383 if (EXPECTED(zend_verify_property_type(prop_info, &z_copy, EX_USES_STRICT_TYPES()))) {
1384 zval_ptr_dtor(zptr);
1385 ZVAL_COPY_VALUE(zptr, &z_copy);
1386 } else {
1387 zval_ptr_dtor(&z_copy);
1388 }
1389 }
1390
zend_check_string_offset(zval * dim,int type EXECUTE_DATA_DC)1391 static zend_never_inline zend_long zend_check_string_offset(zval *dim, int type EXECUTE_DATA_DC)
1392 {
1393 zend_long offset;
1394
1395 try_again:
1396 if (UNEXPECTED(Z_TYPE_P(dim) != IS_LONG)) {
1397 switch(Z_TYPE_P(dim)) {
1398 case IS_STRING:
1399 if (IS_LONG == is_numeric_string(Z_STRVAL_P(dim), Z_STRLEN_P(dim), NULL, NULL, -1)) {
1400 break;
1401 }
1402 if (type != BP_VAR_UNSET) {
1403 zend_error(E_WARNING, "Illegal string offset '%s'", Z_STRVAL_P(dim));
1404 }
1405 break;
1406 case IS_UNDEF:
1407 ZVAL_UNDEFINED_OP2();
1408 case IS_DOUBLE:
1409 case IS_NULL:
1410 case IS_FALSE:
1411 case IS_TRUE:
1412 zend_error(E_NOTICE, "String offset cast occurred");
1413 break;
1414 case IS_REFERENCE:
1415 dim = Z_REFVAL_P(dim);
1416 goto try_again;
1417 default:
1418 zend_illegal_offset();
1419 break;
1420 }
1421
1422 offset = zval_get_long_func(dim);
1423 } else {
1424 offset = Z_LVAL_P(dim);
1425 }
1426
1427 return offset;
1428 }
1429
zend_wrong_string_offset(EXECUTE_DATA_D)1430 static zend_never_inline ZEND_COLD void zend_wrong_string_offset(EXECUTE_DATA_D)
1431 {
1432 const char *msg = NULL;
1433 const zend_op *opline = EX(opline);
1434 const zend_op *end;
1435 uint32_t var;
1436
1437 if (UNEXPECTED(EG(exception) != NULL)) {
1438 return;
1439 }
1440
1441 switch (opline->opcode) {
1442 case ZEND_ASSIGN_OP:
1443 case ZEND_ASSIGN_DIM_OP:
1444 case ZEND_ASSIGN_OBJ_OP:
1445 case ZEND_ASSIGN_STATIC_PROP_OP:
1446 msg = "Cannot use assign-op operators with string offsets";
1447 break;
1448 case ZEND_FETCH_DIM_W:
1449 case ZEND_FETCH_DIM_RW:
1450 case ZEND_FETCH_DIM_FUNC_ARG:
1451 case ZEND_FETCH_DIM_UNSET:
1452 case ZEND_FETCH_LIST_W:
1453 /* TODO: Encode the "reason" into opline->extended_value??? */
1454 var = opline->result.var;
1455 opline++;
1456 end = EG(current_execute_data)->func->op_array.opcodes +
1457 EG(current_execute_data)->func->op_array.last;
1458 while (opline < end) {
1459 if (opline->op1_type == IS_VAR && opline->op1.var == var) {
1460 switch (opline->opcode) {
1461 case ZEND_FETCH_OBJ_W:
1462 case ZEND_FETCH_OBJ_RW:
1463 case ZEND_FETCH_OBJ_FUNC_ARG:
1464 case ZEND_FETCH_OBJ_UNSET:
1465 case ZEND_ASSIGN_OBJ:
1466 case ZEND_ASSIGN_OBJ_OP:
1467 case ZEND_ASSIGN_OBJ_REF:
1468 msg = "Cannot use string offset as an object";
1469 break;
1470 case ZEND_FETCH_DIM_W:
1471 case ZEND_FETCH_DIM_RW:
1472 case ZEND_FETCH_DIM_FUNC_ARG:
1473 case ZEND_FETCH_DIM_UNSET:
1474 case ZEND_FETCH_LIST_W:
1475 case ZEND_ASSIGN_DIM:
1476 case ZEND_ASSIGN_DIM_OP:
1477 msg = "Cannot use string offset as an array";
1478 break;
1479 case ZEND_ASSIGN_STATIC_PROP_OP:
1480 case ZEND_ASSIGN_OP:
1481 msg = "Cannot use assign-op operators with string offsets";
1482 break;
1483 case ZEND_PRE_INC_OBJ:
1484 case ZEND_PRE_DEC_OBJ:
1485 case ZEND_POST_INC_OBJ:
1486 case ZEND_POST_DEC_OBJ:
1487 case ZEND_PRE_INC:
1488 case ZEND_PRE_DEC:
1489 case ZEND_POST_INC:
1490 case ZEND_POST_DEC:
1491 msg = "Cannot increment/decrement string offsets";
1492 break;
1493 case ZEND_ASSIGN_REF:
1494 case ZEND_ADD_ARRAY_ELEMENT:
1495 case ZEND_INIT_ARRAY:
1496 case ZEND_MAKE_REF:
1497 msg = "Cannot create references to/from string offsets";
1498 break;
1499 case ZEND_RETURN_BY_REF:
1500 case ZEND_VERIFY_RETURN_TYPE:
1501 msg = "Cannot return string offsets by reference";
1502 break;
1503 case ZEND_UNSET_DIM:
1504 case ZEND_UNSET_OBJ:
1505 msg = "Cannot unset string offsets";
1506 break;
1507 case ZEND_YIELD:
1508 msg = "Cannot yield string offsets by reference";
1509 break;
1510 case ZEND_SEND_REF:
1511 case ZEND_SEND_VAR_EX:
1512 case ZEND_SEND_FUNC_ARG:
1513 msg = "Only variables can be passed by reference";
1514 break;
1515 case ZEND_FE_RESET_RW:
1516 msg = "Cannot iterate on string offsets by reference";
1517 break;
1518 EMPTY_SWITCH_DEFAULT_CASE();
1519 }
1520 break;
1521 }
1522 if (opline->op2_type == IS_VAR && opline->op2.var == var) {
1523 ZEND_ASSERT(opline->opcode == ZEND_ASSIGN_REF);
1524 msg = "Cannot create references to/from string offsets";
1525 break;
1526 }
1527 opline++;
1528 }
1529 break;
1530 EMPTY_SWITCH_DEFAULT_CASE();
1531 }
1532 ZEND_ASSERT(msg != NULL);
1533 zend_throw_error(NULL, "%s", msg);
1534 }
1535
zend_wrong_property_read(zval * property)1536 static zend_never_inline ZEND_COLD void ZEND_FASTCALL zend_wrong_property_read(zval *property)
1537 {
1538 zend_string *tmp_property_name;
1539 zend_string *property_name = zval_get_tmp_string(property, &tmp_property_name);
1540 zend_error(E_NOTICE, "Trying to get property '%s' of non-object", ZSTR_VAL(property_name));
1541 zend_tmp_string_release(tmp_property_name);
1542 }
1543
zend_deprecated_function(const zend_function * fbc)1544 static zend_never_inline ZEND_COLD void ZEND_FASTCALL zend_deprecated_function(const zend_function *fbc)
1545 {
1546 zend_error(E_DEPRECATED, "Function %s%s%s() is deprecated",
1547 fbc->common.scope ? ZSTR_VAL(fbc->common.scope->name) : "",
1548 fbc->common.scope ? "::" : "",
1549 ZSTR_VAL(fbc->common.function_name));
1550 }
1551
zend_abstract_method(const zend_function * fbc)1552 static zend_never_inline ZEND_COLD void ZEND_FASTCALL zend_abstract_method(const zend_function *fbc)
1553 {
1554 zend_throw_error(NULL, "Cannot call abstract method %s::%s()",
1555 ZSTR_VAL(fbc->common.scope->name), ZSTR_VAL(fbc->common.function_name));
1556 }
1557
zend_assign_to_string_offset(zval * str,zval * dim,zval * value OPLINE_DC EXECUTE_DATA_DC)1558 static zend_never_inline void zend_assign_to_string_offset(zval *str, zval *dim, zval *value OPLINE_DC EXECUTE_DATA_DC)
1559 {
1560 zend_uchar c;
1561 size_t string_len;
1562 zend_long offset;
1563
1564 offset = zend_check_string_offset(dim, BP_VAR_W EXECUTE_DATA_CC);
1565 if (UNEXPECTED(EG(exception) != NULL)) {
1566 if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
1567 ZVAL_UNDEF(EX_VAR(opline->result.var));
1568 }
1569 return;
1570 }
1571 if (offset < -(zend_long)Z_STRLEN_P(str)) {
1572 /* Error on negative offset */
1573 zend_error(E_WARNING, "Illegal string offset: " ZEND_LONG_FMT, offset);
1574 if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
1575 ZVAL_NULL(EX_VAR(opline->result.var));
1576 }
1577 return;
1578 }
1579
1580 if (Z_TYPE_P(value) != IS_STRING) {
1581 /* Convert to string, just the time to pick the 1st byte */
1582 zend_string *tmp = zval_try_get_string_func(value);
1583 if (UNEXPECTED(!tmp)) {
1584 if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
1585 ZVAL_UNDEF(EX_VAR(opline->result.var));
1586 }
1587 return;
1588 }
1589
1590 string_len = ZSTR_LEN(tmp);
1591 c = (zend_uchar)ZSTR_VAL(tmp)[0];
1592 zend_string_release_ex(tmp, 0);
1593 } else {
1594 string_len = Z_STRLEN_P(value);
1595 c = (zend_uchar)Z_STRVAL_P(value)[0];
1596 }
1597
1598 if (string_len == 0) {
1599 /* Error on empty input string */
1600 zend_error(E_WARNING, "Cannot assign an empty string to a string offset");
1601 if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
1602 ZVAL_NULL(EX_VAR(opline->result.var));
1603 }
1604 return;
1605 }
1606
1607 if (offset < 0) { /* Handle negative offset */
1608 offset += (zend_long)Z_STRLEN_P(str);
1609 }
1610
1611 if ((size_t)offset >= Z_STRLEN_P(str)) {
1612 /* Extend string if needed */
1613 zend_long old_len = Z_STRLEN_P(str);
1614 ZVAL_NEW_STR(str, zend_string_extend(Z_STR_P(str), offset + 1, 0));
1615 memset(Z_STRVAL_P(str) + old_len, ' ', offset - old_len);
1616 Z_STRVAL_P(str)[offset+1] = 0;
1617 } else if (!Z_REFCOUNTED_P(str)) {
1618 ZVAL_NEW_STR(str, zend_string_init(Z_STRVAL_P(str), Z_STRLEN_P(str), 0));
1619 } else if (Z_REFCOUNT_P(str) > 1) {
1620 Z_DELREF_P(str);
1621 ZVAL_NEW_STR(str, zend_string_init(Z_STRVAL_P(str), Z_STRLEN_P(str), 0));
1622 } else {
1623 zend_string_forget_hash_val(Z_STR_P(str));
1624 }
1625
1626 Z_STRVAL_P(str)[offset] = c;
1627
1628 if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
1629 /* Return the new character */
1630 ZVAL_INTERNED_STR(EX_VAR(opline->result.var), ZSTR_CHAR(c));
1631 }
1632 }
1633
zend_get_prop_not_accepting_double(zend_reference * ref)1634 static zend_property_info *zend_get_prop_not_accepting_double(zend_reference *ref)
1635 {
1636 zend_property_info *prop;
1637 ZEND_REF_FOREACH_TYPE_SOURCES(ref, prop) {
1638 if (ZEND_TYPE_CODE(prop->type) != IS_DOUBLE) {
1639 return prop;
1640 }
1641 } ZEND_REF_FOREACH_TYPE_SOURCES_END();
1642 return NULL;
1643 }
1644
zend_throw_incdec_ref_error(zend_reference * ref OPLINE_DC)1645 static ZEND_COLD zend_long zend_throw_incdec_ref_error(zend_reference *ref OPLINE_DC)
1646 {
1647 zend_property_info *error_prop = zend_get_prop_not_accepting_double(ref);
1648 /* Currently there should be no way for a typed reference to accept both int and double.
1649 * Generalize this and the related property code once this becomes possible. */
1650 ZEND_ASSERT(error_prop);
1651 if (ZEND_IS_INCREMENT(opline->opcode)) {
1652 zend_type_error(
1653 "Cannot increment a reference held by property %s::$%s of type %sint past its maximal value",
1654 ZSTR_VAL(error_prop->ce->name),
1655 zend_get_unmangled_property_name(error_prop->name),
1656 ZEND_TYPE_ALLOW_NULL(error_prop->type) ? "?" : "");
1657 return ZEND_LONG_MAX;
1658 } else {
1659 zend_type_error(
1660 "Cannot decrement a reference held by property %s::$%s of type %sint past its minimal value",
1661 ZSTR_VAL(error_prop->ce->name),
1662 zend_get_unmangled_property_name(error_prop->name),
1663 ZEND_TYPE_ALLOW_NULL(error_prop->type) ? "?" : "");
1664 return ZEND_LONG_MIN;
1665 }
1666 }
1667
zend_throw_incdec_prop_error(zend_property_info * prop OPLINE_DC)1668 static ZEND_COLD zend_long zend_throw_incdec_prop_error(zend_property_info *prop OPLINE_DC) {
1669 const char *prop_type1, *prop_type2;
1670 zend_format_type(prop->type, &prop_type1, &prop_type2);
1671 if (ZEND_IS_INCREMENT(opline->opcode)) {
1672 zend_type_error("Cannot increment property %s::$%s of type %s%s past its maximal value",
1673 ZSTR_VAL(prop->ce->name),
1674 zend_get_unmangled_property_name(prop->name),
1675 prop_type1, prop_type2);
1676 return ZEND_LONG_MAX;
1677 } else {
1678 zend_type_error("Cannot decrement property %s::$%s of type %s%s past its minimal value",
1679 ZSTR_VAL(prop->ce->name),
1680 zend_get_unmangled_property_name(prop->name),
1681 prop_type1, prop_type2);
1682 return ZEND_LONG_MIN;
1683 }
1684 }
1685
zend_incdec_typed_ref(zend_reference * ref,zval * copy OPLINE_DC EXECUTE_DATA_DC)1686 static void zend_incdec_typed_ref(zend_reference *ref, zval *copy OPLINE_DC EXECUTE_DATA_DC)
1687 {
1688 zval tmp;
1689 zval *var_ptr = &ref->val;
1690
1691 if (!copy) {
1692 copy = &tmp;
1693 }
1694
1695 ZVAL_COPY(copy, var_ptr);
1696
1697 if (ZEND_IS_INCREMENT(opline->opcode)) {
1698 increment_function(var_ptr);
1699 } else {
1700 decrement_function(var_ptr);
1701 }
1702
1703 if (UNEXPECTED(Z_TYPE_P(var_ptr) == IS_DOUBLE) && Z_TYPE_P(copy) == IS_LONG) {
1704 zend_long val = zend_throw_incdec_ref_error(ref OPLINE_CC);
1705 ZVAL_LONG(var_ptr, val);
1706 } else if (UNEXPECTED(!zend_verify_ref_assignable_zval(ref, var_ptr, EX_USES_STRICT_TYPES()))) {
1707 zval_ptr_dtor(var_ptr);
1708 ZVAL_COPY_VALUE(var_ptr, copy);
1709 ZVAL_UNDEF(copy);
1710 } else if (copy == &tmp) {
1711 zval_ptr_dtor(&tmp);
1712 }
1713 }
1714
zend_incdec_typed_prop(zend_property_info * prop_info,zval * var_ptr,zval * copy OPLINE_DC EXECUTE_DATA_DC)1715 static void zend_incdec_typed_prop(zend_property_info *prop_info, zval *var_ptr, zval *copy OPLINE_DC EXECUTE_DATA_DC)
1716 {
1717 zval tmp;
1718
1719 if (!copy) {
1720 copy = &tmp;
1721 }
1722
1723 ZVAL_COPY(copy, var_ptr);
1724
1725 if (ZEND_IS_INCREMENT(opline->opcode)) {
1726 increment_function(var_ptr);
1727 } else {
1728 decrement_function(var_ptr);
1729 }
1730
1731 if (UNEXPECTED(Z_TYPE_P(var_ptr) == IS_DOUBLE) && Z_TYPE_P(copy) == IS_LONG) {
1732 zend_long val = zend_throw_incdec_prop_error(prop_info OPLINE_CC);
1733 ZVAL_LONG(var_ptr, val);
1734 } else if (UNEXPECTED(!zend_verify_property_type(prop_info, var_ptr, EX_USES_STRICT_TYPES()))) {
1735 zval_ptr_dtor(var_ptr);
1736 ZVAL_COPY_VALUE(var_ptr, copy);
1737 ZVAL_UNDEF(copy);
1738 } else if (copy == &tmp) {
1739 zval_ptr_dtor(&tmp);
1740 }
1741 }
1742
zend_pre_incdec_property_zval(zval * prop,zend_property_info * prop_info OPLINE_DC EXECUTE_DATA_DC)1743 static void zend_pre_incdec_property_zval(zval *prop, zend_property_info *prop_info OPLINE_DC EXECUTE_DATA_DC)
1744 {
1745 if (EXPECTED(Z_TYPE_P(prop) == IS_LONG)) {
1746 if (ZEND_IS_INCREMENT(opline->opcode)) {
1747 fast_long_increment_function(prop);
1748 } else {
1749 fast_long_decrement_function(prop);
1750 }
1751 if (UNEXPECTED(Z_TYPE_P(prop) != IS_LONG) && UNEXPECTED(prop_info)) {
1752 zend_long val = zend_throw_incdec_prop_error(prop_info OPLINE_CC);
1753 ZVAL_LONG(prop, val);
1754 }
1755 } else {
1756 do {
1757 if (Z_ISREF_P(prop)) {
1758 zend_reference *ref = Z_REF_P(prop);
1759 prop = Z_REFVAL_P(prop);
1760 if (UNEXPECTED(ZEND_REF_HAS_TYPE_SOURCES(ref))) {
1761 zend_incdec_typed_ref(ref, NULL OPLINE_CC EXECUTE_DATA_CC);
1762 break;
1763 }
1764 }
1765
1766 if (UNEXPECTED(prop_info)) {
1767 zend_incdec_typed_prop(prop_info, prop, NULL OPLINE_CC EXECUTE_DATA_CC);
1768 } else if (ZEND_IS_INCREMENT(opline->opcode)) {
1769 increment_function(prop);
1770 } else {
1771 decrement_function(prop);
1772 }
1773 } while (0);
1774 }
1775 if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
1776 ZVAL_COPY(EX_VAR(opline->result.var), prop);
1777 }
1778 }
1779
zend_post_incdec_property_zval(zval * prop,zend_property_info * prop_info OPLINE_DC EXECUTE_DATA_DC)1780 static void zend_post_incdec_property_zval(zval *prop, zend_property_info *prop_info OPLINE_DC EXECUTE_DATA_DC)
1781 {
1782 if (EXPECTED(Z_TYPE_P(prop) == IS_LONG)) {
1783 ZVAL_LONG(EX_VAR(opline->result.var), Z_LVAL_P(prop));
1784 if (ZEND_IS_INCREMENT(opline->opcode)) {
1785 fast_long_increment_function(prop);
1786 } else {
1787 fast_long_decrement_function(prop);
1788 }
1789 if (UNEXPECTED(Z_TYPE_P(prop) != IS_LONG) && UNEXPECTED(prop_info)) {
1790 zend_long val = zend_throw_incdec_prop_error(prop_info OPLINE_CC);
1791 ZVAL_LONG(prop, val);
1792 }
1793 } else {
1794 if (Z_ISREF_P(prop)) {
1795 zend_reference *ref = Z_REF_P(prop);
1796 prop = Z_REFVAL_P(prop);
1797 if (ZEND_REF_HAS_TYPE_SOURCES(ref)) {
1798 zend_incdec_typed_ref(ref, EX_VAR(opline->result.var) OPLINE_CC EXECUTE_DATA_CC);
1799 return;
1800 }
1801 }
1802
1803 if (UNEXPECTED(prop_info)) {
1804 zend_incdec_typed_prop(prop_info, prop, EX_VAR(opline->result.var) OPLINE_CC EXECUTE_DATA_CC);
1805 } else {
1806 ZVAL_COPY(EX_VAR(opline->result.var), prop);
1807 if (ZEND_IS_INCREMENT(opline->opcode)) {
1808 increment_function(prop);
1809 } else {
1810 decrement_function(prop);
1811 }
1812 }
1813 }
1814 }
1815
zend_post_incdec_overloaded_property(zval * object,zval * property,void ** cache_slot OPLINE_DC EXECUTE_DATA_DC)1816 static zend_never_inline void zend_post_incdec_overloaded_property(zval *object, zval *property, void **cache_slot OPLINE_DC EXECUTE_DATA_DC)
1817 {
1818 zval rv, obj;
1819 zval *z;
1820 zval z_copy;
1821
1822 ZVAL_OBJ(&obj, Z_OBJ_P(object));
1823 Z_ADDREF(obj);
1824 z = Z_OBJ_HT(obj)->read_property(&obj, property, BP_VAR_R, cache_slot, &rv);
1825 if (UNEXPECTED(EG(exception))) {
1826 OBJ_RELEASE(Z_OBJ(obj));
1827 ZVAL_UNDEF(EX_VAR(opline->result.var));
1828 return;
1829 }
1830
1831 if (UNEXPECTED(Z_TYPE_P(z) == IS_OBJECT) && Z_OBJ_HT_P(z)->get) {
1832 zval rv2;
1833 zval *value = Z_OBJ_HT_P(z)->get(z, &rv2);
1834 if (z == &rv) {
1835 zval_ptr_dtor(&rv);
1836 }
1837 ZVAL_COPY_VALUE(z, value);
1838 }
1839
1840 ZVAL_COPY_DEREF(&z_copy, z);
1841 ZVAL_COPY(EX_VAR(opline->result.var), &z_copy);
1842 if (ZEND_IS_INCREMENT(opline->opcode)) {
1843 increment_function(&z_copy);
1844 } else {
1845 decrement_function(&z_copy);
1846 }
1847 Z_OBJ_HT(obj)->write_property(&obj, property, &z_copy, cache_slot);
1848 OBJ_RELEASE(Z_OBJ(obj));
1849 zval_ptr_dtor(&z_copy);
1850 zval_ptr_dtor(z);
1851 }
1852
zend_pre_incdec_overloaded_property(zval * object,zval * property,void ** cache_slot OPLINE_DC EXECUTE_DATA_DC)1853 static zend_never_inline void zend_pre_incdec_overloaded_property(zval *object, zval *property, void **cache_slot OPLINE_DC EXECUTE_DATA_DC)
1854 {
1855 zval rv;
1856 zval *z, obj;
1857 zval z_copy;
1858
1859 ZVAL_OBJ(&obj, Z_OBJ_P(object));
1860 Z_ADDREF(obj);
1861 z = Z_OBJ_HT(obj)->read_property(&obj, property, BP_VAR_R, cache_slot, &rv);
1862 if (UNEXPECTED(EG(exception))) {
1863 OBJ_RELEASE(Z_OBJ(obj));
1864 if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
1865 ZVAL_NULL(EX_VAR(opline->result.var));
1866 }
1867 return;
1868 }
1869
1870 if (UNEXPECTED(Z_TYPE_P(z) == IS_OBJECT) && Z_OBJ_HT_P(z)->get) {
1871 zval rv2;
1872 zval *value = Z_OBJ_HT_P(z)->get(z, &rv2);
1873
1874 if (z == &rv) {
1875 zval_ptr_dtor(&rv);
1876 }
1877 ZVAL_COPY_VALUE(z, value);
1878 }
1879 ZVAL_COPY_DEREF(&z_copy, z);
1880 if (ZEND_IS_INCREMENT(opline->opcode)) {
1881 increment_function(&z_copy);
1882 } else {
1883 decrement_function(&z_copy);
1884 }
1885 if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
1886 ZVAL_COPY(EX_VAR(opline->result.var), &z_copy);
1887 }
1888 Z_OBJ_HT(obj)->write_property(&obj, property, &z_copy, cache_slot);
1889 OBJ_RELEASE(Z_OBJ(obj));
1890 zval_ptr_dtor(&z_copy);
1891 zval_ptr_dtor(z);
1892 }
1893
zend_assign_op_overloaded_property(zval * object,zval * property,void ** cache_slot,zval * value OPLINE_DC EXECUTE_DATA_DC)1894 static zend_never_inline void zend_assign_op_overloaded_property(zval *object, zval *property, void **cache_slot, zval *value OPLINE_DC EXECUTE_DATA_DC)
1895 {
1896 zval *z;
1897 zval rv, obj, res;
1898
1899 ZVAL_OBJ(&obj, Z_OBJ_P(object));
1900 Z_ADDREF(obj);
1901 z = Z_OBJ_HT(obj)->read_property(&obj, property, BP_VAR_R, cache_slot, &rv);
1902 if (UNEXPECTED(EG(exception))) {
1903 OBJ_RELEASE(Z_OBJ(obj));
1904 if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
1905 ZVAL_UNDEF(EX_VAR(opline->result.var));
1906 }
1907 return;
1908 }
1909 if (Z_TYPE_P(z) == IS_OBJECT && Z_OBJ_HT_P(z)->get) {
1910 zval rv2;
1911 zval *value = Z_OBJ_HT_P(z)->get(z, &rv2);
1912
1913 if (z == &rv) {
1914 zval_ptr_dtor(&rv);
1915 }
1916 ZVAL_COPY_VALUE(z, value);
1917 }
1918 if (zend_binary_op(&res, z, value OPLINE_CC) == SUCCESS) {
1919 Z_OBJ_HT(obj)->write_property(&obj, property, &res, cache_slot);
1920 }
1921 if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
1922 ZVAL_COPY(EX_VAR(opline->result.var), &res);
1923 }
1924 zval_ptr_dtor(z);
1925 zval_ptr_dtor(&res);
1926 OBJ_RELEASE(Z_OBJ(obj));
1927 }
1928
1929 /* Utility Functions for Extensions */
zend_extension_statement_handler(const zend_extension * extension,zend_execute_data * frame)1930 static void zend_extension_statement_handler(const zend_extension *extension, zend_execute_data *frame)
1931 {
1932 if (extension->statement_handler) {
1933 extension->statement_handler(frame);
1934 }
1935 }
1936
1937
zend_extension_fcall_begin_handler(const zend_extension * extension,zend_execute_data * frame)1938 static void zend_extension_fcall_begin_handler(const zend_extension *extension, zend_execute_data *frame)
1939 {
1940 if (extension->fcall_begin_handler) {
1941 extension->fcall_begin_handler(frame);
1942 }
1943 }
1944
1945
zend_extension_fcall_end_handler(const zend_extension * extension,zend_execute_data * frame)1946 static void zend_extension_fcall_end_handler(const zend_extension *extension, zend_execute_data *frame)
1947 {
1948 if (extension->fcall_end_handler) {
1949 extension->fcall_end_handler(frame);
1950 }
1951 }
1952
1953
zend_get_target_symbol_table(int fetch_type EXECUTE_DATA_DC)1954 static zend_always_inline HashTable *zend_get_target_symbol_table(int fetch_type EXECUTE_DATA_DC)
1955 {
1956 HashTable *ht;
1957
1958 if (EXPECTED(fetch_type & (ZEND_FETCH_GLOBAL_LOCK | ZEND_FETCH_GLOBAL))) {
1959 ht = &EG(symbol_table);
1960 } else {
1961 ZEND_ASSERT(fetch_type & ZEND_FETCH_LOCAL);
1962 if (!(EX_CALL_INFO() & ZEND_CALL_HAS_SYMBOL_TABLE)) {
1963 zend_rebuild_symbol_table();
1964 }
1965 ht = EX(symbol_table);
1966 }
1967 return ht;
1968 }
1969
zend_undefined_offset(zend_long lval)1970 static zend_never_inline ZEND_COLD void ZEND_FASTCALL zend_undefined_offset(zend_long lval)
1971 {
1972 zend_error(E_NOTICE, "Undefined offset: " ZEND_LONG_FMT, lval);
1973 }
1974
zend_undefined_index(const zend_string * offset)1975 static zend_never_inline ZEND_COLD void ZEND_FASTCALL zend_undefined_index(const zend_string *offset)
1976 {
1977 zend_error(E_NOTICE, "Undefined index: %s", ZSTR_VAL(offset));
1978 }
1979
zend_undefined_offset_write(HashTable * ht,zend_long lval)1980 static zend_never_inline ZEND_COLD int ZEND_FASTCALL zend_undefined_offset_write(
1981 HashTable *ht, zend_long lval)
1982 {
1983 /* The array may be destroyed while throwing the notice.
1984 * Temporarily increase the refcount to detect this situation. */
1985 if (!(GC_FLAGS(ht) & IS_ARRAY_IMMUTABLE)) {
1986 GC_ADDREF(ht);
1987 }
1988 zend_undefined_offset(lval);
1989 if (!(GC_FLAGS(ht) & IS_ARRAY_IMMUTABLE) && !GC_DELREF(ht)) {
1990 zend_array_destroy(ht);
1991 return FAILURE;
1992 }
1993 if (EG(exception)) {
1994 return FAILURE;
1995 }
1996 return SUCCESS;
1997 }
1998
zend_undefined_index_write(HashTable * ht,zend_string * offset)1999 static zend_never_inline ZEND_COLD int ZEND_FASTCALL zend_undefined_index_write(
2000 HashTable *ht, zend_string *offset)
2001 {
2002 /* The array may be destroyed while throwing the notice.
2003 * Temporarily increase the refcount to detect this situation. */
2004 if (!(GC_FLAGS(ht) & IS_ARRAY_IMMUTABLE)) {
2005 GC_ADDREF(ht);
2006 }
2007 zend_undefined_index(offset);
2008 if (!(GC_FLAGS(ht) & IS_ARRAY_IMMUTABLE) && !GC_DELREF(ht)) {
2009 zend_array_destroy(ht);
2010 return FAILURE;
2011 }
2012 if (EG(exception)) {
2013 return FAILURE;
2014 }
2015 return SUCCESS;
2016 }
2017
zend_undefined_method(const zend_class_entry * ce,const zend_string * method)2018 static zend_never_inline ZEND_COLD void ZEND_FASTCALL zend_undefined_method(const zend_class_entry *ce, const zend_string *method)
2019 {
2020 zend_throw_error(NULL, "Call to undefined method %s::%s()", ZSTR_VAL(ce->name), ZSTR_VAL(method));
2021 }
2022
zend_invalid_method_call(zval * object,zval * function_name)2023 static zend_never_inline ZEND_COLD void ZEND_FASTCALL zend_invalid_method_call(zval *object, zval *function_name)
2024 {
2025 zend_throw_error(NULL, "Call to a member function %s() on %s", Z_STRVAL_P(function_name), zend_get_type_by_const(Z_TYPE_P(object)));
2026 }
2027
zend_non_static_method_call(const zend_function * fbc)2028 static zend_never_inline ZEND_COLD void ZEND_FASTCALL zend_non_static_method_call(const zend_function *fbc)
2029 {
2030 if (fbc->common.fn_flags & ZEND_ACC_ALLOW_STATIC) {
2031 zend_error(E_DEPRECATED,
2032 "Non-static method %s::%s() should not be called statically",
2033 ZSTR_VAL(fbc->common.scope->name), ZSTR_VAL(fbc->common.function_name));
2034 } else {
2035 zend_throw_error(
2036 zend_ce_error,
2037 "Non-static method %s::%s() cannot be called statically",
2038 ZSTR_VAL(fbc->common.scope->name), ZSTR_VAL(fbc->common.function_name));
2039 }
2040 }
2041
zend_param_must_be_ref(const zend_function * func,uint32_t arg_num)2042 static zend_never_inline ZEND_COLD void ZEND_FASTCALL zend_param_must_be_ref(const zend_function *func, uint32_t arg_num)
2043 {
2044 zend_error(E_WARNING, "Parameter %d to %s%s%s() expected to be a reference, value given",
2045 arg_num,
2046 func->common.scope ? ZSTR_VAL(func->common.scope->name) : "",
2047 func->common.scope ? "::" : "",
2048 ZSTR_VAL(func->common.function_name));
2049 }
2050
zend_use_scalar_as_array(void)2051 static zend_never_inline ZEND_COLD void ZEND_FASTCALL zend_use_scalar_as_array(void)
2052 {
2053 zend_error(E_WARNING, "Cannot use a scalar value as an array");
2054 }
2055
zend_cannot_add_element(void)2056 static zend_never_inline ZEND_COLD void ZEND_FASTCALL zend_cannot_add_element(void)
2057 {
2058 zend_error(E_WARNING, "Cannot add element to the array as the next element is already occupied");
2059 }
2060
zend_use_resource_as_offset(const zval * dim)2061 static zend_never_inline ZEND_COLD void ZEND_FASTCALL zend_use_resource_as_offset(const zval *dim)
2062 {
2063 zend_error(E_NOTICE, "Resource ID#%d used as offset, casting to integer (%d)", Z_RES_HANDLE_P(dim), Z_RES_HANDLE_P(dim));
2064 }
2065
zend_use_new_element_for_string(void)2066 static zend_never_inline ZEND_COLD void ZEND_FASTCALL zend_use_new_element_for_string(void)
2067 {
2068 zend_throw_error(NULL, "[] operator not supported for strings");
2069 }
2070
zend_binary_assign_op_dim_slow(zval * container,zval * dim OPLINE_DC EXECUTE_DATA_DC)2071 static ZEND_COLD void zend_binary_assign_op_dim_slow(zval *container, zval *dim OPLINE_DC EXECUTE_DATA_DC)
2072 {
2073 if (UNEXPECTED(Z_TYPE_P(container) == IS_STRING)) {
2074 if (opline->op2_type == IS_UNUSED) {
2075 zend_use_new_element_for_string();
2076 } else {
2077 zend_check_string_offset(dim, BP_VAR_RW EXECUTE_DATA_CC);
2078 zend_wrong_string_offset(EXECUTE_DATA_C);
2079 }
2080 } else if (EXPECTED(!Z_ISERROR_P(container))) {
2081 zend_use_scalar_as_array();
2082 }
2083 }
2084
slow_index_convert(HashTable * ht,const zval * dim,zend_value * value EXECUTE_DATA_DC)2085 static zend_never_inline zend_uchar slow_index_convert(HashTable *ht, const zval *dim, zend_value *value EXECUTE_DATA_DC)
2086 {
2087 switch (Z_TYPE_P(dim)) {
2088 case IS_UNDEF: {
2089 /* The array may be destroyed while throwing the notice.
2090 * Temporarily increase the refcount to detect this situation. */
2091 if (!(GC_FLAGS(ht) & IS_ARRAY_IMMUTABLE)) {
2092 GC_ADDREF(ht);
2093 }
2094 ZVAL_UNDEFINED_OP2();
2095 if (!(GC_FLAGS(ht) & IS_ARRAY_IMMUTABLE) && !GC_DELREF(ht)) {
2096 zend_array_destroy(ht);
2097 return IS_NULL;
2098 }
2099 if (EG(exception)) {
2100 return IS_NULL;
2101 }
2102 /* break missing intentionally */
2103 }
2104 case IS_NULL:
2105 value->str = ZSTR_EMPTY_ALLOC();
2106 return IS_STRING;
2107 case IS_DOUBLE:
2108 value->lval = zend_dval_to_lval(Z_DVAL_P(dim));
2109 return IS_LONG;
2110 case IS_RESOURCE:
2111 zend_use_resource_as_offset(dim);
2112 value->lval = Z_RES_HANDLE_P(dim);
2113 return IS_LONG;
2114 case IS_FALSE:
2115 value->lval = 0;
2116 return IS_LONG;
2117 case IS_TRUE:
2118 value->lval = 1;
2119 return IS_LONG;
2120 default:
2121 zend_illegal_offset();
2122 return IS_NULL;
2123 }
2124 }
2125
zend_fetch_dimension_address_inner(HashTable * ht,const zval * dim,int dim_type,int type EXECUTE_DATA_DC)2126 static zend_always_inline zval *zend_fetch_dimension_address_inner(HashTable *ht, const zval *dim, int dim_type, int type EXECUTE_DATA_DC)
2127 {
2128 zval *retval = NULL;
2129 zend_string *offset_key;
2130 zend_ulong hval;
2131
2132 try_again:
2133 if (EXPECTED(Z_TYPE_P(dim) == IS_LONG)) {
2134 hval = Z_LVAL_P(dim);
2135 num_index:
2136 ZEND_HASH_INDEX_FIND(ht, hval, retval, num_undef);
2137 return retval;
2138 num_undef:
2139 switch (type) {
2140 case BP_VAR_R:
2141 zend_undefined_offset(hval);
2142 /* break missing intentionally */
2143 case BP_VAR_UNSET:
2144 case BP_VAR_IS:
2145 retval = &EG(uninitialized_zval);
2146 break;
2147 case BP_VAR_RW:
2148 if (UNEXPECTED(zend_undefined_offset_write(ht, hval) == FAILURE)) {
2149 return NULL;
2150 }
2151 /* break missing intentionally */
2152 case BP_VAR_W:
2153 retval = zend_hash_index_add_new(ht, hval, &EG(uninitialized_zval));
2154 break;
2155 }
2156 } else if (EXPECTED(Z_TYPE_P(dim) == IS_STRING)) {
2157 offset_key = Z_STR_P(dim);
2158 if (ZEND_CONST_COND(dim_type != IS_CONST, 1)) {
2159 if (ZEND_HANDLE_NUMERIC(offset_key, hval)) {
2160 goto num_index;
2161 }
2162 }
2163 str_index:
2164 retval = zend_hash_find_ex(ht, offset_key, ZEND_CONST_COND(dim_type == IS_CONST, 0));
2165 if (retval) {
2166 /* support for $GLOBALS[...] */
2167 if (UNEXPECTED(Z_TYPE_P(retval) == IS_INDIRECT)) {
2168 retval = Z_INDIRECT_P(retval);
2169 if (UNEXPECTED(Z_TYPE_P(retval) == IS_UNDEF)) {
2170 switch (type) {
2171 case BP_VAR_R:
2172 zend_undefined_index(offset_key);
2173 /* break missing intentionally */
2174 case BP_VAR_UNSET:
2175 case BP_VAR_IS:
2176 retval = &EG(uninitialized_zval);
2177 break;
2178 case BP_VAR_RW:
2179 if (UNEXPECTED(zend_undefined_index_write(ht, offset_key))) {
2180 return NULL;
2181 }
2182 /* break missing intentionally */
2183 case BP_VAR_W:
2184 ZVAL_NULL(retval);
2185 break;
2186 }
2187 }
2188 }
2189 } else {
2190 switch (type) {
2191 case BP_VAR_R:
2192 zend_undefined_index(offset_key);
2193 /* break missing intentionally */
2194 case BP_VAR_UNSET:
2195 case BP_VAR_IS:
2196 retval = &EG(uninitialized_zval);
2197 break;
2198 case BP_VAR_RW:
2199 /* Key may be released while throwing the undefined index warning. */
2200 zend_string_addref(offset_key);
2201 if (UNEXPECTED(zend_undefined_index_write(ht, offset_key) == FAILURE)) {
2202 zend_string_release(offset_key);
2203 return NULL;
2204 }
2205 retval = zend_hash_add_new(ht, offset_key, &EG(uninitialized_zval));
2206 zend_string_release(offset_key);
2207 break;
2208 case BP_VAR_W:
2209 retval = zend_hash_add_new(ht, offset_key, &EG(uninitialized_zval));
2210 break;
2211 }
2212 }
2213 } else if (EXPECTED(Z_TYPE_P(dim) == IS_REFERENCE)) {
2214 dim = Z_REFVAL_P(dim);
2215 goto try_again;
2216 } else {
2217 zend_value val;
2218 zend_uchar t = slow_index_convert(ht, dim, &val EXECUTE_DATA_CC);
2219
2220 if (t == IS_STRING) {
2221 offset_key = val.str;
2222 goto str_index;
2223 } else if (t == IS_LONG) {
2224 hval = val.lval;
2225 goto num_index;
2226 } else {
2227 retval = (type == BP_VAR_W || type == BP_VAR_RW) ?
2228 NULL : &EG(uninitialized_zval);
2229 }
2230 }
2231 return retval;
2232 }
2233
zend_fetch_dimension_address_inner_W(HashTable * ht,const zval * dim EXECUTE_DATA_DC)2234 static zend_never_inline zval* ZEND_FASTCALL zend_fetch_dimension_address_inner_W(HashTable *ht, const zval *dim EXECUTE_DATA_DC)
2235 {
2236 return zend_fetch_dimension_address_inner(ht, dim, IS_TMP_VAR, BP_VAR_W EXECUTE_DATA_CC);
2237 }
2238
zend_fetch_dimension_address_inner_W_CONST(HashTable * ht,const zval * dim EXECUTE_DATA_DC)2239 static zend_never_inline zval* ZEND_FASTCALL zend_fetch_dimension_address_inner_W_CONST(HashTable *ht, const zval *dim EXECUTE_DATA_DC)
2240 {
2241 return zend_fetch_dimension_address_inner(ht, dim, IS_CONST, BP_VAR_W EXECUTE_DATA_CC);
2242 }
2243
zend_fetch_dimension_address_inner_RW(HashTable * ht,const zval * dim EXECUTE_DATA_DC)2244 static zend_never_inline zval* ZEND_FASTCALL zend_fetch_dimension_address_inner_RW(HashTable *ht, const zval *dim EXECUTE_DATA_DC)
2245 {
2246 return zend_fetch_dimension_address_inner(ht, dim, IS_TMP_VAR, BP_VAR_RW EXECUTE_DATA_CC);
2247 }
2248
zend_fetch_dimension_address_inner_RW_CONST(HashTable * ht,const zval * dim EXECUTE_DATA_DC)2249 static zend_never_inline zval* ZEND_FASTCALL zend_fetch_dimension_address_inner_RW_CONST(HashTable *ht, const zval *dim EXECUTE_DATA_DC)
2250 {
2251 return zend_fetch_dimension_address_inner(ht, dim, IS_CONST, BP_VAR_RW EXECUTE_DATA_CC);
2252 }
2253
zend_fetch_dimension_address(zval * result,zval * container,zval * dim,int dim_type,int type EXECUTE_DATA_DC)2254 static zend_always_inline void zend_fetch_dimension_address(zval *result, zval *container, zval *dim, int dim_type, int type EXECUTE_DATA_DC)
2255 {
2256 zval *retval;
2257
2258 if (EXPECTED(Z_TYPE_P(container) == IS_ARRAY)) {
2259 try_array:
2260 SEPARATE_ARRAY(container);
2261 fetch_from_array:
2262 if (dim == NULL) {
2263 retval = zend_hash_next_index_insert(Z_ARRVAL_P(container), &EG(uninitialized_zval));
2264 if (UNEXPECTED(retval == NULL)) {
2265 zend_cannot_add_element();
2266 ZVAL_ERROR(result);
2267 return;
2268 }
2269 } else {
2270 retval = zend_fetch_dimension_address_inner(Z_ARRVAL_P(container), dim, dim_type, type EXECUTE_DATA_CC);
2271 if (UNEXPECTED(!retval)) {
2272 ZVAL_ERROR(result);
2273 return;
2274 }
2275 }
2276 ZVAL_INDIRECT(result, retval);
2277 return;
2278 } else if (EXPECTED(Z_TYPE_P(container) == IS_REFERENCE)) {
2279 zend_reference *ref = Z_REF_P(container);
2280 container = Z_REFVAL_P(container);
2281 if (EXPECTED(Z_TYPE_P(container) == IS_ARRAY)) {
2282 goto try_array;
2283 } else if (EXPECTED(Z_TYPE_P(container) <= IS_FALSE)) {
2284 if (type != BP_VAR_UNSET) {
2285 if (ZEND_REF_HAS_TYPE_SOURCES(ref)) {
2286 if (UNEXPECTED(!zend_verify_ref_array_assignable(ref))) {
2287 ZVAL_ERROR(result);
2288 return;
2289 }
2290 }
2291 array_init(container);
2292 goto fetch_from_array;
2293 } else {
2294 goto return_null;
2295 }
2296 }
2297 }
2298 if (UNEXPECTED(Z_TYPE_P(container) == IS_STRING)) {
2299 if (dim == NULL) {
2300 zend_use_new_element_for_string();
2301 } else {
2302 zend_check_string_offset(dim, type EXECUTE_DATA_CC);
2303 zend_wrong_string_offset(EXECUTE_DATA_C);
2304 }
2305 ZVAL_ERROR(result);
2306 } else if (EXPECTED(Z_TYPE_P(container) == IS_OBJECT)) {
2307 if (ZEND_CONST_COND(dim_type == IS_CV, dim != NULL) && UNEXPECTED(Z_TYPE_P(dim) == IS_UNDEF)) {
2308 dim = ZVAL_UNDEFINED_OP2();
2309 }
2310 if (dim_type == IS_CONST && Z_EXTRA_P(dim) == ZEND_EXTRA_VALUE) {
2311 dim++;
2312 }
2313 retval = Z_OBJ_HT_P(container)->read_dimension(container, dim, type, result);
2314
2315 if (UNEXPECTED(retval == &EG(uninitialized_zval))) {
2316 zend_class_entry *ce = Z_OBJCE_P(container);
2317
2318 ZVAL_NULL(result);
2319 zend_error(E_NOTICE, "Indirect modification of overloaded element of %s has no effect", ZSTR_VAL(ce->name));
2320 } else if (EXPECTED(retval && Z_TYPE_P(retval) != IS_UNDEF)) {
2321 if (!Z_ISREF_P(retval)) {
2322 if (result != retval) {
2323 ZVAL_COPY(result, retval);
2324 retval = result;
2325 }
2326 if (Z_TYPE_P(retval) != IS_OBJECT) {
2327 zend_class_entry *ce = Z_OBJCE_P(container);
2328 zend_error(E_NOTICE, "Indirect modification of overloaded element of %s has no effect", ZSTR_VAL(ce->name));
2329 }
2330 } else if (UNEXPECTED(Z_REFCOUNT_P(retval) == 1)) {
2331 ZVAL_UNREF(retval);
2332 }
2333 if (result != retval) {
2334 ZVAL_INDIRECT(result, retval);
2335 }
2336 } else {
2337 ZVAL_ERROR(result);
2338 }
2339 } else {
2340 if (EXPECTED(Z_TYPE_P(container) <= IS_FALSE)) {
2341 if (type != BP_VAR_W && UNEXPECTED(Z_TYPE_P(container) == IS_UNDEF)) {
2342 ZVAL_UNDEFINED_OP1();
2343 }
2344 if (type != BP_VAR_UNSET) {
2345 array_init(container);
2346 goto fetch_from_array;
2347 } else {
2348 return_null:
2349 /* for read-mode only */
2350 if (ZEND_CONST_COND(dim_type == IS_CV, dim != NULL) && UNEXPECTED(Z_TYPE_P(dim) == IS_UNDEF)) {
2351 ZVAL_UNDEFINED_OP2();
2352 }
2353 ZVAL_NULL(result);
2354 }
2355 } else if (EXPECTED(Z_ISERROR_P(container))) {
2356 ZVAL_ERROR(result);
2357 } else {
2358 if (type == BP_VAR_UNSET) {
2359 zend_error(E_WARNING, "Cannot unset offset in a non-array variable");
2360 ZVAL_NULL(result);
2361 } else {
2362 zend_use_scalar_as_array();
2363 ZVAL_ERROR(result);
2364 }
2365 }
2366 }
2367 }
2368
zend_fetch_dimension_address_W(zval * container_ptr,zval * dim,int dim_type OPLINE_DC EXECUTE_DATA_DC)2369 static zend_never_inline void ZEND_FASTCALL zend_fetch_dimension_address_W(zval *container_ptr, zval *dim, int dim_type OPLINE_DC EXECUTE_DATA_DC)
2370 {
2371 zval *result = EX_VAR(opline->result.var);
2372 zend_fetch_dimension_address(result, container_ptr, dim, dim_type, BP_VAR_W EXECUTE_DATA_CC);
2373 }
2374
zend_fetch_dimension_address_RW(zval * container_ptr,zval * dim,int dim_type OPLINE_DC EXECUTE_DATA_DC)2375 static zend_never_inline void ZEND_FASTCALL zend_fetch_dimension_address_RW(zval *container_ptr, zval *dim, int dim_type OPLINE_DC EXECUTE_DATA_DC)
2376 {
2377 zval *result = EX_VAR(opline->result.var);
2378 zend_fetch_dimension_address(result, container_ptr, dim, dim_type, BP_VAR_RW EXECUTE_DATA_CC);
2379 }
2380
zend_fetch_dimension_address_UNSET(zval * container_ptr,zval * dim,int dim_type OPLINE_DC EXECUTE_DATA_DC)2381 static zend_never_inline void ZEND_FASTCALL zend_fetch_dimension_address_UNSET(zval *container_ptr, zval *dim, int dim_type OPLINE_DC EXECUTE_DATA_DC)
2382 {
2383 zval *result = EX_VAR(opline->result.var);
2384 zend_fetch_dimension_address(result, container_ptr, dim, dim_type, BP_VAR_UNSET EXECUTE_DATA_CC);
2385 }
2386
zend_fetch_dimension_address_read(zval * result,zval * container,zval * dim,int dim_type,int type,int is_list,int slow EXECUTE_DATA_DC)2387 static zend_always_inline void zend_fetch_dimension_address_read(zval *result, zval *container, zval *dim, int dim_type, int type, int is_list, int slow EXECUTE_DATA_DC)
2388 {
2389 zval *retval;
2390
2391 if (!slow) {
2392 if (EXPECTED(Z_TYPE_P(container) == IS_ARRAY)) {
2393 try_array:
2394 retval = zend_fetch_dimension_address_inner(Z_ARRVAL_P(container), dim, dim_type, type EXECUTE_DATA_CC);
2395 ZVAL_COPY_DEREF(result, retval);
2396 return;
2397 } else if (EXPECTED(Z_TYPE_P(container) == IS_REFERENCE)) {
2398 container = Z_REFVAL_P(container);
2399 if (EXPECTED(Z_TYPE_P(container) == IS_ARRAY)) {
2400 goto try_array;
2401 }
2402 }
2403 }
2404 if (!is_list && EXPECTED(Z_TYPE_P(container) == IS_STRING)) {
2405 zend_long offset;
2406
2407 try_string_offset:
2408 if (UNEXPECTED(Z_TYPE_P(dim) != IS_LONG)) {
2409 switch (Z_TYPE_P(dim)) {
2410 /* case IS_LONG: */
2411 case IS_STRING:
2412 if (IS_LONG == is_numeric_string(Z_STRVAL_P(dim), Z_STRLEN_P(dim), NULL, NULL, -1)) {
2413 break;
2414 }
2415 if (type == BP_VAR_IS) {
2416 ZVAL_NULL(result);
2417 return;
2418 }
2419 zend_error(E_WARNING, "Illegal string offset '%s'", Z_STRVAL_P(dim));
2420 break;
2421 case IS_UNDEF:
2422 ZVAL_UNDEFINED_OP2();
2423 case IS_DOUBLE:
2424 case IS_NULL:
2425 case IS_FALSE:
2426 case IS_TRUE:
2427 if (type != BP_VAR_IS) {
2428 zend_error(E_NOTICE, "String offset cast occurred");
2429 }
2430 break;
2431 case IS_REFERENCE:
2432 dim = Z_REFVAL_P(dim);
2433 goto try_string_offset;
2434 default:
2435 zend_illegal_offset();
2436 break;
2437 }
2438
2439 offset = zval_get_long_func(dim);
2440 } else {
2441 offset = Z_LVAL_P(dim);
2442 }
2443
2444 if (UNEXPECTED(Z_STRLEN_P(container) < ((offset < 0) ? -(size_t)offset : ((size_t)offset + 1)))) {
2445 if (type != BP_VAR_IS) {
2446 zend_error(E_NOTICE, "Uninitialized string offset: " ZEND_LONG_FMT, offset);
2447 ZVAL_EMPTY_STRING(result);
2448 } else {
2449 ZVAL_NULL(result);
2450 }
2451 } else {
2452 zend_uchar c;
2453 zend_long real_offset;
2454
2455 real_offset = (UNEXPECTED(offset < 0)) /* Handle negative offset */
2456 ? (zend_long)Z_STRLEN_P(container) + offset : offset;
2457 c = (zend_uchar)Z_STRVAL_P(container)[real_offset];
2458
2459 ZVAL_INTERNED_STR(result, ZSTR_CHAR(c));
2460 }
2461 } else if (EXPECTED(Z_TYPE_P(container) == IS_OBJECT)) {
2462 if (ZEND_CONST_COND(dim_type == IS_CV, 1) && UNEXPECTED(Z_TYPE_P(dim) == IS_UNDEF)) {
2463 dim = ZVAL_UNDEFINED_OP2();
2464 }
2465 if (dim_type == IS_CONST && Z_EXTRA_P(dim) == ZEND_EXTRA_VALUE) {
2466 dim++;
2467 }
2468 retval = Z_OBJ_HT_P(container)->read_dimension(container, dim, type, result);
2469
2470 ZEND_ASSERT(result != NULL);
2471 if (retval) {
2472 if (result != retval) {
2473 ZVAL_COPY_DEREF(result, retval);
2474 } else if (UNEXPECTED(Z_ISREF_P(retval))) {
2475 zend_unwrap_reference(result);
2476 }
2477 } else {
2478 ZVAL_NULL(result);
2479 }
2480 } else {
2481 if (type != BP_VAR_IS && UNEXPECTED(Z_TYPE_P(container) == IS_UNDEF)) {
2482 container = ZVAL_UNDEFINED_OP1();
2483 }
2484 if (ZEND_CONST_COND(dim_type == IS_CV, 1) && UNEXPECTED(Z_TYPE_P(dim) == IS_UNDEF)) {
2485 ZVAL_UNDEFINED_OP2();
2486 }
2487 if (!is_list && type != BP_VAR_IS) {
2488 zend_error(E_NOTICE, "Trying to access array offset on value of type %s",
2489 zend_zval_type_name(container));
2490 }
2491 ZVAL_NULL(result);
2492 }
2493 }
2494
zend_fetch_dimension_address_read_R(zval * container,zval * dim,int dim_type OPLINE_DC EXECUTE_DATA_DC)2495 static zend_never_inline void ZEND_FASTCALL zend_fetch_dimension_address_read_R(zval *container, zval *dim, int dim_type OPLINE_DC EXECUTE_DATA_DC)
2496 {
2497 zval *result = EX_VAR(opline->result.var);
2498 zend_fetch_dimension_address_read(result, container, dim, dim_type, BP_VAR_R, 0, 0 EXECUTE_DATA_CC);
2499 }
2500
zend_fetch_dimension_address_read_R_slow(zval * container,zval * dim OPLINE_DC EXECUTE_DATA_DC)2501 static zend_never_inline void zend_fetch_dimension_address_read_R_slow(zval *container, zval *dim OPLINE_DC EXECUTE_DATA_DC)
2502 {
2503 zval *result = EX_VAR(opline->result.var);
2504 zend_fetch_dimension_address_read(result, container, dim, IS_CV, BP_VAR_R, 0, 1 EXECUTE_DATA_CC);
2505 }
2506
zend_fetch_dimension_address_read_IS(zval * container,zval * dim,int dim_type OPLINE_DC EXECUTE_DATA_DC)2507 static zend_never_inline void ZEND_FASTCALL zend_fetch_dimension_address_read_IS(zval *container, zval *dim, int dim_type OPLINE_DC EXECUTE_DATA_DC)
2508 {
2509 zval *result = EX_VAR(opline->result.var);
2510 zend_fetch_dimension_address_read(result, container, dim, dim_type, BP_VAR_IS, 0, 0 EXECUTE_DATA_CC);
2511 }
2512
zend_fetch_dimension_address_LIST_r(zval * container,zval * dim,int dim_type OPLINE_DC EXECUTE_DATA_DC)2513 static zend_never_inline void ZEND_FASTCALL zend_fetch_dimension_address_LIST_r(zval *container, zval *dim, int dim_type OPLINE_DC EXECUTE_DATA_DC)
2514 {
2515 zval *result = EX_VAR(opline->result.var);
2516 zend_fetch_dimension_address_read(result, container, dim, dim_type, BP_VAR_R, 1, 0 EXECUTE_DATA_CC);
2517 }
2518
zend_fetch_dimension_const(zval * result,zval * container,zval * dim,int type)2519 ZEND_API void zend_fetch_dimension_const(zval *result, zval *container, zval *dim, int type)
2520 {
2521 zend_fetch_dimension_address_read(result, container, dim, IS_TMP_VAR, type, 0, 0 NO_EXECUTE_DATA_CC);
2522 }
2523
zend_find_array_dim_slow(HashTable * ht,zval * offset EXECUTE_DATA_DC)2524 static zend_never_inline zval* ZEND_FASTCALL zend_find_array_dim_slow(HashTable *ht, zval *offset EXECUTE_DATA_DC)
2525 {
2526 zend_ulong hval;
2527
2528 if (Z_TYPE_P(offset) == IS_DOUBLE) {
2529 hval = zend_dval_to_lval(Z_DVAL_P(offset));
2530 num_idx:
2531 return zend_hash_index_find(ht, hval);
2532 } else if (Z_TYPE_P(offset) == IS_NULL) {
2533 str_idx:
2534 return zend_hash_find_ex_ind(ht, ZSTR_EMPTY_ALLOC(), 1);
2535 } else if (Z_TYPE_P(offset) == IS_FALSE) {
2536 hval = 0;
2537 goto num_idx;
2538 } else if (Z_TYPE_P(offset) == IS_TRUE) {
2539 hval = 1;
2540 goto num_idx;
2541 } else if (Z_TYPE_P(offset) == IS_RESOURCE) {
2542 hval = Z_RES_HANDLE_P(offset);
2543 goto num_idx;
2544 } else if (/*OP2_TYPE == IS_CV &&*/ Z_TYPE_P(offset) == IS_UNDEF) {
2545 ZVAL_UNDEFINED_OP2();
2546 goto str_idx;
2547 } else {
2548 zend_error(E_WARNING, "Illegal offset type in isset or empty");
2549 return NULL;
2550 }
2551 }
2552
zend_isset_dim_slow(zval * container,zval * offset EXECUTE_DATA_DC)2553 static zend_never_inline int ZEND_FASTCALL zend_isset_dim_slow(zval *container, zval *offset EXECUTE_DATA_DC)
2554 {
2555 if (/*OP2_TYPE == IS_CV &&*/ UNEXPECTED(Z_TYPE_P(offset) == IS_UNDEF)) {
2556 offset = ZVAL_UNDEFINED_OP2();
2557 }
2558
2559 if (/*OP1_TYPE != IS_CONST &&*/ EXPECTED(Z_TYPE_P(container) == IS_OBJECT)) {
2560 return Z_OBJ_HT_P(container)->has_dimension(container, offset, 0);
2561 } else if (EXPECTED(Z_TYPE_P(container) == IS_STRING)) { /* string offsets */
2562 zend_long lval;
2563
2564 if (EXPECTED(Z_TYPE_P(offset) == IS_LONG)) {
2565 lval = Z_LVAL_P(offset);
2566 str_offset:
2567 if (UNEXPECTED(lval < 0)) { /* Handle negative offset */
2568 lval += (zend_long)Z_STRLEN_P(container);
2569 }
2570 if (EXPECTED(lval >= 0) && (size_t)lval < Z_STRLEN_P(container)) {
2571 return 1;
2572 } else {
2573 return 0;
2574 }
2575 } else {
2576 /*if (OP2_TYPE & (IS_CV|IS_VAR)) {*/
2577 ZVAL_DEREF(offset);
2578 /*}*/
2579 if (Z_TYPE_P(offset) < IS_STRING /* simple scalar types */
2580 || (Z_TYPE_P(offset) == IS_STRING /* or numeric string */
2581 && IS_LONG == is_numeric_string(Z_STRVAL_P(offset), Z_STRLEN_P(offset), NULL, NULL, 0))) {
2582 lval = zval_get_long(offset);
2583 goto str_offset;
2584 }
2585 return 0;
2586 }
2587 } else {
2588 return 0;
2589 }
2590 }
2591
zend_isempty_dim_slow(zval * container,zval * offset EXECUTE_DATA_DC)2592 static zend_never_inline int ZEND_FASTCALL zend_isempty_dim_slow(zval *container, zval *offset EXECUTE_DATA_DC)
2593 {
2594 if (/*OP2_TYPE == IS_CV &&*/ UNEXPECTED(Z_TYPE_P(offset) == IS_UNDEF)) {
2595 offset = ZVAL_UNDEFINED_OP2();
2596 }
2597
2598 if (/*OP1_TYPE != IS_CONST &&*/ EXPECTED(Z_TYPE_P(container) == IS_OBJECT)) {
2599 return !Z_OBJ_HT_P(container)->has_dimension(container, offset, 1);
2600 } else if (EXPECTED(Z_TYPE_P(container) == IS_STRING)) { /* string offsets */
2601 zend_long lval;
2602
2603 if (EXPECTED(Z_TYPE_P(offset) == IS_LONG)) {
2604 lval = Z_LVAL_P(offset);
2605 str_offset:
2606 if (UNEXPECTED(lval < 0)) { /* Handle negative offset */
2607 lval += (zend_long)Z_STRLEN_P(container);
2608 }
2609 if (EXPECTED(lval >= 0) && (size_t)lval < Z_STRLEN_P(container)) {
2610 return (Z_STRVAL_P(container)[lval] == '0');
2611 } else {
2612 return 1;
2613 }
2614 } else {
2615 /*if (OP2_TYPE & (IS_CV|IS_VAR)) {*/
2616 ZVAL_DEREF(offset);
2617 /*}*/
2618 if (Z_TYPE_P(offset) < IS_STRING /* simple scalar types */
2619 || (Z_TYPE_P(offset) == IS_STRING /* or numeric string */
2620 && IS_LONG == is_numeric_string(Z_STRVAL_P(offset), Z_STRLEN_P(offset), NULL, NULL, 0))) {
2621 lval = zval_get_long(offset);
2622 goto str_offset;
2623 }
2624 return 1;
2625 }
2626 } else {
2627 return 1;
2628 }
2629 }
2630
zend_array_key_exists_fast(HashTable * ht,zval * key OPLINE_DC EXECUTE_DATA_DC)2631 static zend_never_inline uint32_t ZEND_FASTCALL zend_array_key_exists_fast(HashTable *ht, zval *key OPLINE_DC EXECUTE_DATA_DC)
2632 {
2633 zend_string *str;
2634 zend_ulong hval;
2635
2636 try_again:
2637 if (EXPECTED(Z_TYPE_P(key) == IS_STRING)) {
2638 str = Z_STR_P(key);
2639 if (ZEND_HANDLE_NUMERIC(str, hval)) {
2640 goto num_key;
2641 }
2642 str_key:
2643 return zend_hash_find_ind(ht, str) != NULL ? IS_TRUE : IS_FALSE;
2644 } else if (EXPECTED(Z_TYPE_P(key) == IS_LONG)) {
2645 hval = Z_LVAL_P(key);
2646 num_key:
2647 return zend_hash_index_find(ht, hval) != NULL ? IS_TRUE : IS_FALSE;
2648 } else if (EXPECTED(Z_ISREF_P(key))) {
2649 key = Z_REFVAL_P(key);
2650 goto try_again;
2651 } else if (Z_TYPE_P(key) <= IS_NULL) {
2652 if (UNEXPECTED(Z_TYPE_P(key) == IS_UNDEF)) {
2653 ZVAL_UNDEFINED_OP1();
2654 }
2655 str = ZSTR_EMPTY_ALLOC();
2656 goto str_key;
2657 } else {
2658 zend_error(E_WARNING, "array_key_exists(): The first argument should be either a string or an integer");
2659 return IS_FALSE;
2660 }
2661 }
2662
zend_array_key_exists_slow(zval * subject,zval * key OPLINE_DC EXECUTE_DATA_DC)2663 static zend_never_inline uint32_t ZEND_FASTCALL zend_array_key_exists_slow(zval *subject, zval *key OPLINE_DC EXECUTE_DATA_DC)
2664 {
2665 if (EXPECTED(Z_TYPE_P(subject) == IS_OBJECT)) {
2666 zend_error(E_DEPRECATED, "array_key_exists(): "
2667 "Using array_key_exists() on objects is deprecated. "
2668 "Use isset() or property_exists() instead");
2669
2670 HashTable *ht = zend_get_properties_for(subject, ZEND_PROP_PURPOSE_ARRAY_CAST);
2671 uint32_t result = zend_array_key_exists_fast(ht, key OPLINE_CC EXECUTE_DATA_CC);
2672 zend_release_properties(ht);
2673 return result;
2674 } else {
2675 if (UNEXPECTED(Z_TYPE_P(key) == IS_UNDEF)) {
2676 ZVAL_UNDEFINED_OP1();
2677 }
2678 if (UNEXPECTED(Z_TYPE_INFO_P(subject) == IS_UNDEF)) {
2679 ZVAL_UNDEFINED_OP2();
2680 }
2681 zend_internal_type_error(EX_USES_STRICT_TYPES(), "array_key_exists() expects parameter 2 to be array, %s given", zend_get_type_by_const(Z_TYPE_P(subject)));
2682 return IS_NULL;
2683 }
2684 }
2685
promotes_to_array(zval * val)2686 static zend_always_inline zend_bool promotes_to_array(zval *val) {
2687 return Z_TYPE_P(val) <= IS_FALSE
2688 || (Z_ISREF_P(val) && Z_TYPE_P(Z_REFVAL_P(val)) <= IS_FALSE);
2689 }
2690
promotes_to_object(zval * val)2691 static zend_always_inline zend_bool promotes_to_object(zval *val) {
2692 ZVAL_DEREF(val);
2693 return Z_TYPE_P(val) <= IS_FALSE
2694 || (Z_TYPE_P(val) == IS_STRING && Z_STRLEN_P(val) == 0);
2695 }
2696
check_type_array_assignable(zend_type type)2697 static zend_always_inline zend_bool check_type_array_assignable(zend_type type) {
2698 if (!type) {
2699 return 1;
2700 }
2701 return ZEND_TYPE_IS_CODE(type)
2702 && (ZEND_TYPE_CODE(type) == IS_ARRAY || ZEND_TYPE_CODE(type) == IS_ITERABLE);
2703 }
2704
check_type_stdClass_assignable(zend_type type)2705 static zend_always_inline zend_bool check_type_stdClass_assignable(zend_type type) {
2706 if (!type) {
2707 return 1;
2708 }
2709 if (ZEND_TYPE_IS_CLASS(type)) {
2710 if (ZEND_TYPE_IS_CE(type)) {
2711 return ZEND_TYPE_CE(type) == zend_standard_class_def;
2712 } else {
2713 return zend_string_equals_literal_ci(ZEND_TYPE_NAME(type), "stdclass");
2714 }
2715 } else {
2716 return ZEND_TYPE_CODE(type) == IS_OBJECT;
2717 }
2718 }
2719
2720 /* Checks whether an array can be assigned to the reference. Returns conflicting property if
2721 * assignment is not possible, NULL otherwise. */
zend_verify_ref_array_assignable(zend_reference * ref)2722 static zend_never_inline zend_bool zend_verify_ref_array_assignable(zend_reference *ref) {
2723 zend_property_info *prop;
2724 ZEND_ASSERT(ZEND_REF_HAS_TYPE_SOURCES(ref));
2725 ZEND_REF_FOREACH_TYPE_SOURCES(ref, prop) {
2726 if (!check_type_array_assignable(prop->type)) {
2727 zend_throw_auto_init_in_ref_error(prop, "array");
2728 return 0;
2729 }
2730 } ZEND_REF_FOREACH_TYPE_SOURCES_END();
2731 return 1;
2732 }
2733
2734 /* Checks whether an stdClass can be assigned to the reference. Returns conflicting property if
2735 * assignment is not possible, NULL otherwise. */
zend_verify_ref_stdClass_assignable(zend_reference * ref)2736 static zend_never_inline zend_bool zend_verify_ref_stdClass_assignable(zend_reference *ref) {
2737 zend_property_info *prop;
2738 ZEND_ASSERT(ZEND_REF_HAS_TYPE_SOURCES(ref));
2739 ZEND_REF_FOREACH_TYPE_SOURCES(ref, prop) {
2740 if (!check_type_stdClass_assignable(prop->type)) {
2741 zend_throw_auto_init_in_ref_error(prop, "stdClass");
2742 return 0;
2743 }
2744 } ZEND_REF_FOREACH_TYPE_SOURCES_END();
2745 return 1;
2746 }
2747
zend_object_fetch_property_type_info(zend_object * obj,zval * slot)2748 static zend_property_info *zend_object_fetch_property_type_info(
2749 zend_object *obj, zval *slot)
2750 {
2751 if (EXPECTED(!ZEND_CLASS_HAS_TYPE_HINTS(obj->ce))) {
2752 return NULL;
2753 }
2754
2755 /* Not a declared property */
2756 if (UNEXPECTED(slot < obj->properties_table ||
2757 slot >= obj->properties_table + obj->ce->default_properties_count)) {
2758 return NULL;
2759 }
2760
2761 return zend_get_typed_property_info_for_slot(obj, slot);
2762 }
2763
zend_handle_fetch_obj_flags(zval * result,zval * ptr,zend_object * obj,zend_property_info * prop_info,uint32_t flags)2764 static zend_never_inline zend_bool zend_handle_fetch_obj_flags(
2765 zval *result, zval *ptr, zend_object *obj, zend_property_info *prop_info, uint32_t flags)
2766 {
2767 switch (flags) {
2768 case ZEND_FETCH_DIM_WRITE:
2769 if (promotes_to_array(ptr)) {
2770 if (!prop_info) {
2771 prop_info = zend_object_fetch_property_type_info(obj, ptr);
2772 if (!prop_info) {
2773 break;
2774 }
2775 }
2776 if (!check_type_array_assignable(prop_info->type)) {
2777 zend_throw_auto_init_in_prop_error(prop_info, "array");
2778 if (result) ZVAL_ERROR(result);
2779 return 0;
2780 }
2781 }
2782 break;
2783 case ZEND_FETCH_OBJ_WRITE:
2784 if (promotes_to_object(ptr)) {
2785 if (!prop_info) {
2786 prop_info = zend_object_fetch_property_type_info(obj, ptr);
2787 if (!prop_info) {
2788 break;
2789 }
2790 }
2791 if (!check_type_stdClass_assignable(prop_info->type)) {
2792 zend_throw_auto_init_in_prop_error(prop_info, "stdClass");
2793 if (result) ZVAL_ERROR(result);
2794 return 0;
2795 }
2796 }
2797 break;
2798 case ZEND_FETCH_REF:
2799 if (Z_TYPE_P(ptr) != IS_REFERENCE) {
2800 if (!prop_info) {
2801 prop_info = zend_object_fetch_property_type_info(obj, ptr);
2802 if (!prop_info) {
2803 break;
2804 }
2805 }
2806 if (Z_TYPE_P(ptr) == IS_UNDEF) {
2807 if (!ZEND_TYPE_ALLOW_NULL(prop_info->type)) {
2808 zend_throw_access_uninit_prop_by_ref_error(prop_info);
2809 if (result) ZVAL_ERROR(result);
2810 return 0;
2811 }
2812 ZVAL_NULL(ptr);
2813 }
2814
2815 ZVAL_NEW_REF(ptr, ptr);
2816 ZEND_REF_ADD_TYPE_SOURCE(Z_REF_P(ptr), prop_info);
2817 }
2818 break;
2819 EMPTY_SWITCH_DEFAULT_CASE()
2820 }
2821 return 1;
2822 }
2823
zend_fetch_property_address(zval * result,zval * container,uint32_t container_op_type,zval * prop_ptr,uint32_t prop_op_type,void ** cache_slot,int type,uint32_t flags,zend_bool init_undef OPLINE_DC EXECUTE_DATA_DC)2824 static zend_always_inline void zend_fetch_property_address(zval *result, zval *container, uint32_t container_op_type, zval *prop_ptr, uint32_t prop_op_type, void **cache_slot, int type, uint32_t flags, zend_bool init_undef OPLINE_DC EXECUTE_DATA_DC)
2825 {
2826 zval *ptr;
2827
2828 if (container_op_type != IS_UNUSED && UNEXPECTED(Z_TYPE_P(container) != IS_OBJECT)) {
2829 do {
2830 if (Z_ISREF_P(container) && Z_TYPE_P(Z_REFVAL_P(container)) == IS_OBJECT) {
2831 container = Z_REFVAL_P(container);
2832 break;
2833 }
2834
2835 if (container_op_type == IS_CV
2836 && type != BP_VAR_W
2837 && UNEXPECTED(Z_TYPE_P(container) == IS_UNDEF)) {
2838 ZVAL_UNDEFINED_OP1();
2839 }
2840
2841 /* this should modify object only if it's empty */
2842 if (type == BP_VAR_UNSET) {
2843 ZVAL_NULL(result);
2844 return;
2845 }
2846
2847 container = make_real_object(container, prop_ptr OPLINE_CC EXECUTE_DATA_CC);
2848 if (UNEXPECTED(!container)) {
2849 ZVAL_ERROR(result);
2850 return;
2851 }
2852 } while (0);
2853 }
2854 if (prop_op_type == IS_CONST &&
2855 EXPECTED(Z_OBJCE_P(container) == CACHED_PTR_EX(cache_slot))) {
2856 uintptr_t prop_offset = (uintptr_t)CACHED_PTR_EX(cache_slot + 1);
2857 zend_object *zobj = Z_OBJ_P(container);
2858
2859 if (EXPECTED(IS_VALID_PROPERTY_OFFSET(prop_offset))) {
2860 ptr = OBJ_PROP(zobj, prop_offset);
2861 if (EXPECTED(Z_TYPE_P(ptr) != IS_UNDEF)) {
2862 ZVAL_INDIRECT(result, ptr);
2863 if (flags) {
2864 zend_property_info *prop_info = CACHED_PTR_EX(cache_slot + 2);
2865 if (prop_info) {
2866 zend_handle_fetch_obj_flags(result, ptr, NULL, prop_info, flags);
2867 }
2868 }
2869 return;
2870 }
2871 } else if (EXPECTED(zobj->properties != NULL)) {
2872 if (UNEXPECTED(GC_REFCOUNT(zobj->properties) > 1)) {
2873 if (EXPECTED(!(GC_FLAGS(zobj->properties) & IS_ARRAY_IMMUTABLE))) {
2874 GC_DELREF(zobj->properties);
2875 }
2876 zobj->properties = zend_array_dup(zobj->properties);
2877 }
2878 ptr = zend_hash_find_ex(zobj->properties, Z_STR_P(prop_ptr), 1);
2879 if (EXPECTED(ptr)) {
2880 ZVAL_INDIRECT(result, ptr);
2881 return;
2882 }
2883 }
2884 }
2885 ptr = Z_OBJ_HT_P(container)->get_property_ptr_ptr(container, prop_ptr, type, cache_slot);
2886 if (NULL == ptr) {
2887 ptr = Z_OBJ_HT_P(container)->read_property(container, prop_ptr, type, cache_slot, result);
2888 if (ptr == result) {
2889 if (UNEXPECTED(Z_ISREF_P(ptr) && Z_REFCOUNT_P(ptr) == 1)) {
2890 ZVAL_UNREF(ptr);
2891 }
2892 return;
2893 }
2894 if (UNEXPECTED(EG(exception))) {
2895 ZVAL_ERROR(result);
2896 return;
2897 }
2898 } else if (UNEXPECTED(Z_ISERROR_P(ptr))) {
2899 ZVAL_ERROR(result);
2900 return;
2901 }
2902
2903 ZVAL_INDIRECT(result, ptr);
2904 if (flags) {
2905 zend_property_info *prop_info;
2906
2907 if (prop_op_type == IS_CONST) {
2908 prop_info = CACHED_PTR_EX(cache_slot + 2);
2909 if (prop_info) {
2910 if (UNEXPECTED(!zend_handle_fetch_obj_flags(result, ptr, NULL, prop_info, flags))) {
2911 return;
2912 }
2913 }
2914 } else {
2915 if (UNEXPECTED(!zend_handle_fetch_obj_flags(result, ptr, Z_OBJ_P(container), NULL, flags))) {
2916 return;
2917 }
2918 }
2919 }
2920 if (init_undef && UNEXPECTED(Z_TYPE_P(ptr) == IS_UNDEF)) {
2921 ZVAL_NULL(ptr);
2922 }
2923 }
2924
zend_assign_to_property_reference(zval * container,uint32_t container_op_type,zval * prop_ptr,uint32_t prop_op_type,zval * value_ptr OPLINE_DC EXECUTE_DATA_DC)2925 static zend_always_inline void zend_assign_to_property_reference(zval *container, uint32_t container_op_type, zval *prop_ptr, uint32_t prop_op_type, zval *value_ptr OPLINE_DC EXECUTE_DATA_DC)
2926 {
2927 zval variable, *variable_ptr = &variable;
2928 void **cache_addr = (prop_op_type == IS_CONST) ? CACHE_ADDR(opline->extended_value & ~ZEND_RETURNS_FUNCTION) : NULL;
2929
2930 zend_fetch_property_address(variable_ptr, container, container_op_type, prop_ptr, prop_op_type,
2931 cache_addr, BP_VAR_W, 0, 0 OPLINE_CC EXECUTE_DATA_CC);
2932
2933 if (Z_TYPE_P(variable_ptr) == IS_INDIRECT) {
2934 variable_ptr = Z_INDIRECT_P(variable_ptr);
2935 }
2936
2937 if (UNEXPECTED(Z_ISERROR_P(variable_ptr))) {
2938 variable_ptr = &EG(uninitialized_zval);
2939 } else if (UNEXPECTED(Z_TYPE(variable) != IS_INDIRECT)) {
2940 zend_throw_error(NULL, "Cannot assign by reference to overloaded object");
2941 zval_ptr_dtor(&variable);
2942 variable_ptr = &EG(uninitialized_zval);
2943 } else if (/*OP_DATA_TYPE == IS_VAR &&*/ UNEXPECTED(Z_ISERROR_P(value_ptr))) {
2944 variable_ptr = &EG(uninitialized_zval);
2945 } else if (/*OP_DATA_TYPE == IS_VAR &&*/
2946 (opline->extended_value & ZEND_RETURNS_FUNCTION) &&
2947 UNEXPECTED(!Z_ISREF_P(value_ptr))) {
2948
2949 variable_ptr = zend_wrong_assign_to_variable_reference(
2950 variable_ptr, value_ptr OPLINE_CC EXECUTE_DATA_CC);
2951 } else {
2952 zend_property_info *prop_info = NULL;
2953
2954 if (prop_op_type == IS_CONST) {
2955 prop_info = (zend_property_info *) CACHED_PTR_EX(cache_addr + 2);
2956 } else {
2957 ZVAL_DEREF(container);
2958 prop_info = zend_object_fetch_property_type_info(Z_OBJ_P(container), variable_ptr);
2959 }
2960
2961 if (UNEXPECTED(prop_info)) {
2962 variable_ptr = zend_assign_to_typed_property_reference(prop_info, variable_ptr, value_ptr EXECUTE_DATA_CC);
2963 } else {
2964 zend_assign_to_variable_reference(variable_ptr, value_ptr);
2965 }
2966 }
2967
2968 if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
2969 ZVAL_COPY(EX_VAR(opline->result.var), variable_ptr);
2970 }
2971 }
2972
zend_assign_to_property_reference_this_const(zval * container,zval * prop_ptr,zval * value_ptr OPLINE_DC EXECUTE_DATA_DC)2973 static zend_never_inline void zend_assign_to_property_reference_this_const(zval *container, zval *prop_ptr, zval *value_ptr OPLINE_DC EXECUTE_DATA_DC)
2974 {
2975 zend_assign_to_property_reference(container, IS_UNUSED, prop_ptr, IS_CONST, value_ptr
2976 OPLINE_CC EXECUTE_DATA_CC);
2977 }
2978
zend_assign_to_property_reference_var_const(zval * container,zval * prop_ptr,zval * value_ptr OPLINE_DC EXECUTE_DATA_DC)2979 static zend_never_inline void zend_assign_to_property_reference_var_const(zval *container, zval *prop_ptr, zval *value_ptr OPLINE_DC EXECUTE_DATA_DC)
2980 {
2981 zend_assign_to_property_reference(container, IS_VAR, prop_ptr, IS_CONST, value_ptr
2982 OPLINE_CC EXECUTE_DATA_CC);
2983 }
2984
zend_assign_to_property_reference_this_var(zval * container,zval * prop_ptr,zval * value_ptr OPLINE_DC EXECUTE_DATA_DC)2985 static zend_never_inline void zend_assign_to_property_reference_this_var(zval *container, zval *prop_ptr, zval *value_ptr OPLINE_DC EXECUTE_DATA_DC)
2986 {
2987 zend_assign_to_property_reference(container, IS_UNUSED, prop_ptr, IS_VAR, value_ptr
2988 OPLINE_CC EXECUTE_DATA_CC);
2989 }
2990
zend_assign_to_property_reference_var_var(zval * container,zval * prop_ptr,zval * value_ptr OPLINE_DC EXECUTE_DATA_DC)2991 static zend_never_inline void zend_assign_to_property_reference_var_var(zval *container, zval *prop_ptr, zval *value_ptr OPLINE_DC EXECUTE_DATA_DC)
2992 {
2993 zend_assign_to_property_reference(container, IS_VAR, prop_ptr, IS_VAR, value_ptr
2994 OPLINE_CC EXECUTE_DATA_CC);
2995 }
2996
zend_fetch_static_property_address_ex(zval ** retval,zend_property_info ** prop_info,uint32_t cache_slot,int fetch_type OPLINE_DC EXECUTE_DATA_DC)2997 static zend_never_inline int zend_fetch_static_property_address_ex(zval **retval, zend_property_info **prop_info, uint32_t cache_slot, int fetch_type OPLINE_DC EXECUTE_DATA_DC) {
2998 zend_free_op free_op1;
2999 zend_string *name, *tmp_name;
3000 zend_class_entry *ce;
3001 zend_property_info *property_info;
3002
3003 zend_uchar op1_type = opline->op1_type, op2_type = opline->op2_type;
3004
3005 if (EXPECTED(op2_type == IS_CONST)) {
3006 zval *class_name = RT_CONSTANT(opline, opline->op2);
3007
3008 ZEND_ASSERT(op1_type != IS_CONST || CACHED_PTR(cache_slot) == NULL);
3009
3010 if (EXPECTED((ce = CACHED_PTR(cache_slot)) == NULL)) {
3011 ce = zend_fetch_class_by_name(Z_STR_P(class_name), Z_STR_P(class_name + 1), ZEND_FETCH_CLASS_DEFAULT | ZEND_FETCH_CLASS_EXCEPTION);
3012 if (UNEXPECTED(ce == NULL)) {
3013 FREE_UNFETCHED_OP(op1_type, opline->op1.var);
3014 return FAILURE;
3015 }
3016 if (UNEXPECTED(op1_type != IS_CONST)) {
3017 CACHE_PTR(cache_slot, ce);
3018 }
3019 }
3020 } else {
3021 if (EXPECTED(op2_type == IS_UNUSED)) {
3022 ce = zend_fetch_class(NULL, opline->op2.num);
3023 if (UNEXPECTED(ce == NULL)) {
3024 FREE_UNFETCHED_OP(op1_type, opline->op1.var);
3025 return FAILURE;
3026 }
3027 } else {
3028 ce = Z_CE_P(EX_VAR(opline->op2.var));
3029 }
3030 if (EXPECTED(op1_type == IS_CONST) && EXPECTED(CACHED_PTR(cache_slot) == ce)) {
3031 *retval = CACHED_PTR(cache_slot + sizeof(void *));
3032 *prop_info = CACHED_PTR(cache_slot + sizeof(void *) * 2);
3033 return SUCCESS;
3034 }
3035 }
3036
3037 if (EXPECTED(op1_type == IS_CONST)) {
3038 name = Z_STR_P(RT_CONSTANT(opline, opline->op1));
3039 } else {
3040 zval *varname = get_zval_ptr_undef(opline->op1_type, opline->op1, &free_op1, BP_VAR_R);
3041 if (EXPECTED(Z_TYPE_P(varname) == IS_STRING)) {
3042 name = Z_STR_P(varname);
3043 tmp_name = NULL;
3044 } else {
3045 if (op1_type == IS_CV && UNEXPECTED(Z_TYPE_P(varname) == IS_UNDEF)) {
3046 zval_undefined_cv(opline->op1.var EXECUTE_DATA_CC);
3047 }
3048 name = zval_get_tmp_string(varname, &tmp_name);
3049 }
3050 }
3051
3052 *retval = zend_std_get_static_property_with_info(ce, name, fetch_type, &property_info);
3053
3054 if (UNEXPECTED(op1_type != IS_CONST)) {
3055 zend_tmp_string_release(tmp_name);
3056
3057 if (op1_type != IS_CV) {
3058 zval_ptr_dtor_nogc(free_op1);
3059 }
3060 }
3061
3062 if (UNEXPECTED(*retval == NULL)) {
3063 return FAILURE;
3064 }
3065
3066 *prop_info = property_info;
3067
3068 if (EXPECTED(op1_type == IS_CONST)) {
3069 CACHE_POLYMORPHIC_PTR(cache_slot, ce, *retval);
3070 CACHE_PTR(cache_slot + sizeof(void *) * 2, property_info);
3071 }
3072
3073 return SUCCESS;
3074 }
3075
3076
zend_fetch_static_property_address(zval ** retval,zend_property_info ** prop_info,uint32_t cache_slot,int fetch_type,int flags OPLINE_DC EXECUTE_DATA_DC)3077 static zend_always_inline int zend_fetch_static_property_address(zval **retval, zend_property_info **prop_info, uint32_t cache_slot, int fetch_type, int flags OPLINE_DC EXECUTE_DATA_DC) {
3078 int success;
3079 zend_property_info *property_info;
3080
3081 if (opline->op1_type == IS_CONST && (opline->op2_type == IS_CONST || (opline->op2_type == IS_UNUSED && (opline->op2.num == ZEND_FETCH_CLASS_SELF || opline->op2.num == ZEND_FETCH_CLASS_PARENT))) && EXPECTED(CACHED_PTR(cache_slot) != NULL)) {
3082 *retval = CACHED_PTR(cache_slot + sizeof(void *));
3083 property_info = CACHED_PTR(cache_slot + sizeof(void *) * 2);
3084
3085 if ((fetch_type == BP_VAR_R || fetch_type == BP_VAR_RW)
3086 && UNEXPECTED(Z_TYPE_P(*retval) == IS_UNDEF) && UNEXPECTED(property_info->type != 0)) {
3087 zend_throw_error(NULL, "Typed static property %s::$%s must not be accessed before initialization",
3088 ZSTR_VAL(property_info->ce->name),
3089 zend_get_unmangled_property_name(property_info->name));
3090 return FAILURE;
3091 }
3092 } else {
3093 success = zend_fetch_static_property_address_ex(retval, &property_info, cache_slot, fetch_type OPLINE_CC EXECUTE_DATA_CC);
3094 if (UNEXPECTED(success != SUCCESS)) {
3095 return FAILURE;
3096 }
3097 }
3098
3099 if (flags && property_info->type) {
3100 zend_handle_fetch_obj_flags(NULL, *retval, NULL, property_info, flags);
3101 }
3102
3103 if (prop_info) {
3104 *prop_info = property_info;
3105 }
3106
3107 return SUCCESS;
3108 }
3109
zend_throw_ref_type_error_type(zend_property_info * prop1,zend_property_info * prop2,zval * zv)3110 ZEND_API ZEND_COLD void zend_throw_ref_type_error_type(zend_property_info *prop1, zend_property_info *prop2, zval *zv) {
3111 const char *prop1_type1, *prop1_type2, *prop2_type1, *prop2_type2;
3112 zend_format_type(prop1->type, &prop1_type1, &prop1_type2);
3113 zend_format_type(prop2->type, &prop2_type1, &prop2_type2);
3114 zend_type_error("Reference with value of type %s held by property %s::$%s of type %s%s is not compatible with property %s::$%s of type %s%s",
3115 Z_TYPE_P(zv) == IS_OBJECT ? ZSTR_VAL(Z_OBJCE_P(zv)->name) : zend_get_type_by_const(Z_TYPE_P(zv)),
3116 ZSTR_VAL(prop1->ce->name),
3117 zend_get_unmangled_property_name(prop1->name),
3118 prop1_type1, prop1_type2,
3119 ZSTR_VAL(prop2->ce->name),
3120 zend_get_unmangled_property_name(prop2->name),
3121 prop2_type1, prop2_type2
3122 );
3123 }
3124
zend_throw_ref_type_error_zval(zend_property_info * prop,zval * zv)3125 ZEND_API ZEND_COLD void zend_throw_ref_type_error_zval(zend_property_info *prop, zval *zv) {
3126 const char *prop_type1, *prop_type2;
3127 zend_format_type(prop->type, &prop_type1, &prop_type2);
3128 zend_type_error("Cannot assign %s to reference held by property %s::$%s of type %s%s",
3129 Z_TYPE_P(zv) == IS_OBJECT ? ZSTR_VAL(Z_OBJCE_P(zv)->name) : zend_get_type_by_const(Z_TYPE_P(zv)),
3130 ZSTR_VAL(prop->ce->name),
3131 zend_get_unmangled_property_name(prop->name),
3132 prop_type1, prop_type2
3133 );
3134 }
3135
zend_throw_conflicting_coercion_error(zend_property_info * prop1,zend_property_info * prop2,zval * zv)3136 ZEND_API ZEND_COLD void zend_throw_conflicting_coercion_error(zend_property_info *prop1, zend_property_info *prop2, zval *zv) {
3137 const char *prop1_type1, *prop1_type2, *prop2_type1, *prop2_type2;
3138 zend_format_type(prop1->type, &prop1_type1, &prop1_type2);
3139 zend_format_type(prop2->type, &prop2_type1, &prop2_type2);
3140 zend_type_error("Cannot assign %s to reference held by property %s::$%s of type %s%s and property %s::$%s of type %s%s, as this would result in an inconsistent type conversion",
3141 Z_TYPE_P(zv) == IS_OBJECT ? ZSTR_VAL(Z_OBJCE_P(zv)->name) : zend_get_type_by_const(Z_TYPE_P(zv)),
3142 ZSTR_VAL(prop1->ce->name),
3143 zend_get_unmangled_property_name(prop1->name),
3144 prop1_type1, prop1_type2,
3145 ZSTR_VAL(prop2->ce->name),
3146 zend_get_unmangled_property_name(prop2->name),
3147 prop2_type1, prop2_type2
3148 );
3149 }
3150
3151 /* 1: valid, 0: invalid, -1: may be valid after type coercion */
i_zend_verify_type_assignable_zval(zend_type * type_ptr,zend_class_entry * self_ce,zval * zv,zend_bool strict)3152 static zend_always_inline int i_zend_verify_type_assignable_zval(
3153 zend_type *type_ptr, zend_class_entry *self_ce, zval *zv, zend_bool strict) {
3154 zend_type type = *type_ptr;
3155 zend_uchar type_code;
3156 zend_uchar zv_type = Z_TYPE_P(zv);
3157
3158 if (ZEND_TYPE_ALLOW_NULL(type) && zv_type == IS_NULL) {
3159 return 1;
3160 }
3161
3162 if (ZEND_TYPE_IS_CLASS(type)) {
3163 if (!ZEND_TYPE_IS_CE(type)) {
3164 if (!zend_resolve_class_type(type_ptr, self_ce)) {
3165 return 0;
3166 }
3167 type = *type_ptr;
3168 }
3169 return zv_type == IS_OBJECT && instanceof_function(Z_OBJCE_P(zv), ZEND_TYPE_CE(type));
3170 }
3171
3172 type_code = ZEND_TYPE_CODE(type);
3173 if (type_code == zv_type ||
3174 (type_code == _IS_BOOL && (zv_type == IS_FALSE || zv_type == IS_TRUE))) {
3175 return 1;
3176 }
3177
3178 if (type_code == IS_ITERABLE) {
3179 return zend_is_iterable(zv);
3180 }
3181
3182 /* SSTH Exception: IS_LONG may be accepted as IS_DOUBLE (converted) */
3183 if (strict) {
3184 if (type_code == IS_DOUBLE && zv_type == IS_LONG) {
3185 return -1;
3186 }
3187 return 0;
3188 }
3189
3190 /* No weak conversions for arrays and objects */
3191 if (type_code == IS_ARRAY || type_code == IS_OBJECT) {
3192 return 0;
3193 }
3194
3195 /* NULL may be accepted only by nullable hints (this is already checked) */
3196 if (zv_type == IS_NULL) {
3197 return 0;
3198 }
3199
3200 /* Coercion may be necessary, check separately */
3201 return -1;
3202 }
3203
zend_verify_ref_assignable_zval(zend_reference * ref,zval * zv,zend_bool strict)3204 ZEND_API zend_bool ZEND_FASTCALL zend_verify_ref_assignable_zval(zend_reference *ref, zval *zv, zend_bool strict)
3205 {
3206 zend_property_info *prop;
3207
3208 /* The value must satisfy each property type, and coerce to the same value for each property
3209 * type. Right now, the latter rule means that *if* coercion is necessary, then all types
3210 * must be the same (modulo nullability). To handle this, remember the first type we see and
3211 * compare against it when coercion becomes necessary. */
3212 zend_property_info *seen_prop = NULL;
3213 zend_uchar seen_type;
3214 zend_bool needs_coercion = 0;
3215
3216 ZEND_ASSERT(Z_TYPE_P(zv) != IS_REFERENCE);
3217 ZEND_REF_FOREACH_TYPE_SOURCES(ref, prop) {
3218 int result = i_zend_verify_type_assignable_zval(&prop->type, prop->ce, zv, strict);
3219 if (result == 0) {
3220 zend_throw_ref_type_error_zval(prop, zv);
3221 return 0;
3222 }
3223
3224 if (result < 0) {
3225 needs_coercion = 1;
3226 }
3227
3228 if (!seen_prop) {
3229 seen_prop = prop;
3230 seen_type = ZEND_TYPE_IS_CLASS(prop->type) ? IS_OBJECT : ZEND_TYPE_CODE(prop->type);
3231 } else if (needs_coercion && seen_type != ZEND_TYPE_CODE(prop->type)) {
3232 zend_throw_conflicting_coercion_error(seen_prop, prop, zv);
3233 return 0;
3234 }
3235 } ZEND_REF_FOREACH_TYPE_SOURCES_END();
3236
3237 if (UNEXPECTED(needs_coercion && !zend_verify_weak_scalar_type_hint(seen_type, zv))) {
3238 zend_throw_ref_type_error_zval(seen_prop, zv);
3239 return 0;
3240 }
3241
3242 return 1;
3243 }
3244
i_zval_ptr_dtor_noref(zval * zval_ptr)3245 static zend_always_inline void i_zval_ptr_dtor_noref(zval *zval_ptr) {
3246 if (Z_REFCOUNTED_P(zval_ptr)) {
3247 zend_refcounted *ref = Z_COUNTED_P(zval_ptr);
3248 ZEND_ASSERT(Z_TYPE_P(zval_ptr) != IS_REFERENCE);
3249 if (!GC_DELREF(ref)) {
3250 rc_dtor_func(ref);
3251 } else if (UNEXPECTED(GC_MAY_LEAK(ref))) {
3252 gc_possible_root(ref);
3253 }
3254 }
3255 }
3256
zend_assign_to_typed_ref(zval * variable_ptr,zval * orig_value,zend_uchar value_type,zend_bool strict,zend_refcounted * ref)3257 ZEND_API zval* zend_assign_to_typed_ref(zval *variable_ptr, zval *orig_value, zend_uchar value_type, zend_bool strict, zend_refcounted *ref)
3258 {
3259 zend_bool ret;
3260 zval value;
3261 ZVAL_COPY(&value, orig_value);
3262 ret = zend_verify_ref_assignable_zval(Z_REF_P(variable_ptr), &value, strict);
3263 variable_ptr = Z_REFVAL_P(variable_ptr);
3264 if (EXPECTED(ret)) {
3265 i_zval_ptr_dtor_noref(variable_ptr);
3266 ZVAL_COPY_VALUE(variable_ptr, &value);
3267 } else {
3268 zval_ptr_dtor_nogc(&value);
3269 }
3270 if (value_type & (IS_VAR|IS_TMP_VAR)) {
3271 if (UNEXPECTED(ref)) {
3272 if (UNEXPECTED(GC_DELREF(ref) == 0)) {
3273 zval_ptr_dtor(orig_value);
3274 efree_size(ref, sizeof(zend_reference));
3275 }
3276 } else {
3277 i_zval_ptr_dtor_noref(orig_value);
3278 }
3279 }
3280 return variable_ptr;
3281 }
3282
zend_verify_prop_assignable_by_ref(zend_property_info * prop_info,zval * orig_val,zend_bool strict)3283 ZEND_API zend_bool ZEND_FASTCALL zend_verify_prop_assignable_by_ref(zend_property_info *prop_info, zval *orig_val, zend_bool strict) {
3284 zval *val = orig_val;
3285 if (Z_ISREF_P(val) && ZEND_REF_HAS_TYPE_SOURCES(Z_REF_P(val))) {
3286 int result;
3287
3288 val = Z_REFVAL_P(val);
3289 result = i_zend_verify_type_assignable_zval(&prop_info->type, prop_info->ce, val, strict);
3290 if (result > 0) {
3291 return 1;
3292 }
3293
3294 if (result < 0) {
3295 zend_property_info *ref_prop = ZEND_REF_FIRST_SOURCE(Z_REF_P(orig_val));
3296 if (ZEND_TYPE_CODE(prop_info->type) != ZEND_TYPE_CODE(ref_prop->type)) {
3297 /* Invalid due to conflicting coercion */
3298 zend_throw_ref_type_error_type(ref_prop, prop_info, val);
3299 return 0;
3300 }
3301 if (zend_verify_weak_scalar_type_hint(ZEND_TYPE_CODE(prop_info->type), val)) {
3302 return 1;
3303 }
3304 }
3305 } else {
3306 ZVAL_DEREF(val);
3307 if (i_zend_check_property_type(prop_info, val, strict)) {
3308 return 1;
3309 }
3310 }
3311
3312 zend_verify_property_type_error(prop_info, val);
3313 return 0;
3314 }
3315
zend_ref_add_type_source(zend_property_info_source_list * source_list,zend_property_info * prop)3316 ZEND_API void ZEND_FASTCALL zend_ref_add_type_source(zend_property_info_source_list *source_list, zend_property_info *prop)
3317 {
3318 zend_property_info_list *list;
3319 if (source_list->ptr == NULL) {
3320 source_list->ptr = prop;
3321 return;
3322 }
3323
3324 list = ZEND_PROPERTY_INFO_SOURCE_TO_LIST(source_list->list);
3325 if (!ZEND_PROPERTY_INFO_SOURCE_IS_LIST(source_list->list)) {
3326 list = emalloc(sizeof(zend_property_info_list) + (4 - 1) * sizeof(zend_property_info *));
3327 list->ptr[0] = source_list->ptr;
3328 list->num_allocated = 4;
3329 list->num = 1;
3330 } else if (list->num_allocated == list->num) {
3331 list->num_allocated = list->num * 2;
3332 list = erealloc(list, sizeof(zend_property_info_list) + (list->num_allocated - 1) * sizeof(zend_property_info *));
3333 }
3334
3335 list->ptr[list->num++] = prop;
3336 source_list->list = ZEND_PROPERTY_INFO_SOURCE_FROM_LIST(list);
3337 }
3338
zend_ref_del_type_source(zend_property_info_source_list * source_list,zend_property_info * prop)3339 ZEND_API void ZEND_FASTCALL zend_ref_del_type_source(zend_property_info_source_list *source_list, zend_property_info *prop)
3340 {
3341 zend_property_info_list *list = ZEND_PROPERTY_INFO_SOURCE_TO_LIST(source_list->list);
3342 zend_property_info **ptr, **end;
3343
3344 if (!ZEND_PROPERTY_INFO_SOURCE_IS_LIST(source_list->list)) {
3345 ZEND_ASSERT(source_list->ptr == prop);
3346 source_list->ptr = NULL;
3347 return;
3348 }
3349
3350 if (list->num == 1) {
3351 ZEND_ASSERT(*list->ptr == prop);
3352 efree(list);
3353 source_list->ptr = NULL;
3354 return;
3355 }
3356
3357 /* Checking against end here to get a more graceful failure mode if we missed adding a type
3358 * source at some point. */
3359 ptr = list->ptr;
3360 end = ptr + list->num;
3361 while (ptr < end && *ptr != prop) {
3362 ptr++;
3363 }
3364 ZEND_ASSERT(*ptr == prop);
3365
3366 /* Copy the last list element into the deleted slot. */
3367 *ptr = list->ptr[--list->num];
3368
3369 if (list->num >= 4 && list->num * 4 == list->num_allocated) {
3370 list->num_allocated = list->num * 2;
3371 source_list->list = ZEND_PROPERTY_INFO_SOURCE_FROM_LIST(erealloc(list, sizeof(zend_property_info_list) + (list->num_allocated - 1) * sizeof(zend_property_info *)));
3372 }
3373 }
3374
zend_fetch_this_var(int type OPLINE_DC EXECUTE_DATA_DC)3375 static zend_never_inline void zend_fetch_this_var(int type OPLINE_DC EXECUTE_DATA_DC)
3376 {
3377 zval *result = EX_VAR(opline->result.var);
3378
3379 switch (type) {
3380 case BP_VAR_R:
3381 if (EXPECTED(Z_TYPE(EX(This)) == IS_OBJECT)) {
3382 ZVAL_OBJ(result, Z_OBJ(EX(This)));
3383 Z_ADDREF_P(result);
3384 } else {
3385 ZVAL_NULL(result);
3386 zend_error(E_NOTICE,"Undefined variable: this");
3387 }
3388 break;
3389 case BP_VAR_IS:
3390 if (EXPECTED(Z_TYPE(EX(This)) == IS_OBJECT)) {
3391 ZVAL_OBJ(result, Z_OBJ(EX(This)));
3392 Z_ADDREF_P(result);
3393 } else {
3394 ZVAL_NULL(result);
3395 }
3396 break;
3397 case BP_VAR_RW:
3398 case BP_VAR_W:
3399 ZVAL_UNDEF(result);
3400 zend_throw_error(NULL, "Cannot re-assign $this");
3401 break;
3402 case BP_VAR_UNSET:
3403 ZVAL_UNDEF(result);
3404 zend_throw_error(NULL, "Cannot unset $this");
3405 break;
3406 EMPTY_SWITCH_DEFAULT_CASE()
3407 }
3408 }
3409
zend_wrong_clone_call(zend_function * clone,zend_class_entry * scope)3410 static zend_never_inline ZEND_COLD void ZEND_FASTCALL zend_wrong_clone_call(zend_function *clone, zend_class_entry *scope)
3411 {
3412 zend_throw_error(NULL, "Call to %s %s::__clone() from context '%s'", zend_visibility_string(clone->common.fn_flags), ZSTR_VAL(clone->common.scope->name), scope ? ZSTR_VAL(scope->name) : "");
3413 }
3414
3415 #if ZEND_INTENSIVE_DEBUGGING
3416
3417 #define CHECK_SYMBOL_TABLES() \
3418 zend_hash_apply(&EG(symbol_table), zend_check_symbol); \
3419 if (&EG(symbol_table)!=EX(symbol_table)) { \
3420 zend_hash_apply(EX(symbol_table), zend_check_symbol); \
3421 }
3422
zend_check_symbol(zval * pz)3423 static int zend_check_symbol(zval *pz)
3424 {
3425 if (Z_TYPE_P(pz) == IS_INDIRECT) {
3426 pz = Z_INDIRECT_P(pz);
3427 }
3428 if (Z_TYPE_P(pz) > 10) {
3429 fprintf(stderr, "Warning! %x has invalid type!\n", *pz);
3430 /* See http://support.microsoft.com/kb/190351 */
3431 #ifdef ZEND_WIN32
3432 fflush(stderr);
3433 #endif
3434 } else if (Z_TYPE_P(pz) == IS_ARRAY) {
3435 zend_hash_apply(Z_ARRVAL_P(pz), zend_check_symbol);
3436 } else if (Z_TYPE_P(pz) == IS_OBJECT) {
3437 /* OBJ-TBI - doesn't support new object model! */
3438 zend_hash_apply(Z_OBJPROP_P(pz), zend_check_symbol);
3439 }
3440
3441 return 0;
3442 }
3443
3444
3445 #else
3446 #define CHECK_SYMBOL_TABLES()
3447 #endif
3448
execute_internal(zend_execute_data * execute_data,zval * return_value)3449 ZEND_API void execute_internal(zend_execute_data *execute_data, zval *return_value)
3450 {
3451 execute_data->func->internal_function.handler(execute_data, return_value);
3452 }
3453
zend_clean_and_cache_symbol_table(zend_array * symbol_table)3454 ZEND_API void zend_clean_and_cache_symbol_table(zend_array *symbol_table) /* {{{ */
3455 {
3456 /* Clean before putting into the cache, since clean could call dtors,
3457 * which could use the cached hash. Also do this before the check for
3458 * available cache slots, as those may be used by a dtor as well. */
3459 zend_symtable_clean(symbol_table);
3460 if (EG(symtable_cache_ptr) >= EG(symtable_cache_limit)) {
3461 zend_array_destroy(symbol_table);
3462 } else {
3463 *(EG(symtable_cache_ptr)++) = symbol_table;
3464 }
3465 }
3466 /* }}} */
3467
i_free_compiled_variables(zend_execute_data * execute_data)3468 static zend_always_inline void i_free_compiled_variables(zend_execute_data *execute_data) /* {{{ */
3469 {
3470 zval *cv = EX_VAR_NUM(0);
3471 int count = EX(func)->op_array.last_var;
3472 while (EXPECTED(count != 0)) {
3473 if (Z_REFCOUNTED_P(cv)) {
3474 zend_refcounted *r = Z_COUNTED_P(cv);
3475 if (!GC_DELREF(r)) {
3476 ZVAL_NULL(cv);
3477 rc_dtor_func(r);
3478 } else {
3479 gc_check_possible_root(r);
3480 }
3481 }
3482 cv++;
3483 count--;
3484 }
3485 }
3486 /* }}} */
3487
zend_free_compiled_variables(zend_execute_data * execute_data)3488 ZEND_API void zend_free_compiled_variables(zend_execute_data *execute_data) /* {{{ */
3489 {
3490 i_free_compiled_variables(execute_data);
3491 }
3492 /* }}} */
3493
3494 #define ZEND_VM_INTERRUPT_CHECK() do { \
3495 if (UNEXPECTED(EG(vm_interrupt))) { \
3496 ZEND_VM_INTERRUPT(); \
3497 } \
3498 } while (0)
3499
3500 #define ZEND_VM_LOOP_INTERRUPT_CHECK() do { \
3501 if (UNEXPECTED(EG(vm_interrupt))) { \
3502 ZEND_VM_LOOP_INTERRUPT(); \
3503 } \
3504 } while (0)
3505
3506 /*
3507 * Stack Frame Layout (the whole stack frame is allocated at once)
3508 * ==================
3509 *
3510 * +========================================+
3511 * EG(current_execute_data) -> | zend_execute_data |
3512 * +----------------------------------------+
3513 * EX_VAR_NUM(0) --------> | VAR[0] = ARG[1] |
3514 * | ... |
3515 * | VAR[op_array->num_args-1] = ARG[N] |
3516 * | ... |
3517 * | VAR[op_array->last_var-1] |
3518 * | VAR[op_array->last_var] = TMP[0] |
3519 * | ... |
3520 * | VAR[op_array->last_var+op_array->T-1] |
3521 * | ARG[N+1] (extra_args) |
3522 * | ... |
3523 * +----------------------------------------+
3524 */
3525
3526 /* zend_copy_extra_args is used when the actually passed number of arguments
3527 * (EX_NUM_ARGS) is greater than what the function defined (op_array->num_args).
3528 *
3529 * The extra arguments will be copied into the call frame after all the compiled variables.
3530 *
3531 * If there are extra arguments copied, a flag "ZEND_CALL_FREE_EXTRA_ARGS" will be set
3532 * on the zend_execute_data, and when the executor leaves the function, the
3533 * args will be freed in zend_leave_helper.
3534 */
zend_copy_extra_args(EXECUTE_DATA_D)3535 static zend_never_inline void zend_copy_extra_args(EXECUTE_DATA_D)
3536 {
3537 zend_op_array *op_array = &EX(func)->op_array;
3538 uint32_t first_extra_arg = op_array->num_args;
3539 uint32_t num_args = EX_NUM_ARGS();
3540 zval *src;
3541 size_t delta;
3542 uint32_t count;
3543 uint32_t type_flags = 0;
3544
3545 if (EXPECTED((op_array->fn_flags & ZEND_ACC_HAS_TYPE_HINTS) == 0)) {
3546 /* Skip useless ZEND_RECV and ZEND_RECV_INIT opcodes */
3547 #if defined(ZEND_VM_IP_GLOBAL_REG) && ((ZEND_VM_KIND == ZEND_VM_KIND_CALL) || (ZEND_VM_KIND == ZEND_VM_KIND_HYBRID))
3548 opline += first_extra_arg;
3549 #else
3550 EX(opline) += first_extra_arg;
3551 #endif
3552
3553 }
3554
3555 /* move extra args into separate array after all CV and TMP vars */
3556 src = EX_VAR_NUM(num_args - 1);
3557 delta = op_array->last_var + op_array->T - first_extra_arg;
3558 count = num_args - first_extra_arg;
3559 if (EXPECTED(delta != 0)) {
3560 delta *= sizeof(zval);
3561 do {
3562 type_flags |= Z_TYPE_INFO_P(src);
3563 ZVAL_COPY_VALUE((zval*)(((char*)src) + delta), src);
3564 ZVAL_UNDEF(src);
3565 src--;
3566 } while (--count);
3567 if (Z_TYPE_INFO_REFCOUNTED(type_flags)) {
3568 ZEND_ADD_CALL_FLAG(execute_data, ZEND_CALL_FREE_EXTRA_ARGS);
3569 }
3570 } else {
3571 do {
3572 if (Z_REFCOUNTED_P(src)) {
3573 ZEND_ADD_CALL_FLAG(execute_data, ZEND_CALL_FREE_EXTRA_ARGS);
3574 break;
3575 }
3576 src--;
3577 } while (--count);
3578 }
3579 }
3580
zend_init_cvs(uint32_t first,uint32_t last EXECUTE_DATA_DC)3581 static zend_always_inline void zend_init_cvs(uint32_t first, uint32_t last EXECUTE_DATA_DC)
3582 {
3583 if (EXPECTED(first < last)) {
3584 uint32_t count = last - first;
3585 zval *var = EX_VAR_NUM(first);
3586
3587 do {
3588 ZVAL_UNDEF(var);
3589 var++;
3590 } while (--count);
3591 }
3592 }
3593
i_init_func_execute_data(zend_op_array * op_array,zval * return_value,zend_bool may_be_trampoline EXECUTE_DATA_DC)3594 static zend_always_inline void i_init_func_execute_data(zend_op_array *op_array, zval *return_value, zend_bool may_be_trampoline EXECUTE_DATA_DC) /* {{{ */
3595 {
3596 uint32_t first_extra_arg, num_args;
3597 ZEND_ASSERT(EX(func) == (zend_function*)op_array);
3598
3599 #if defined(ZEND_VM_IP_GLOBAL_REG) && ((ZEND_VM_KIND == ZEND_VM_KIND_CALL) || (ZEND_VM_KIND == ZEND_VM_KIND_HYBRID))
3600 opline = op_array->opcodes;
3601 #else
3602 EX(opline) = op_array->opcodes;
3603 #endif
3604 EX(call) = NULL;
3605 EX(return_value) = return_value;
3606
3607 /* Handle arguments */
3608 first_extra_arg = op_array->num_args;
3609 num_args = EX_NUM_ARGS();
3610 if (UNEXPECTED(num_args > first_extra_arg)) {
3611 if (!may_be_trampoline || EXPECTED(!(op_array->fn_flags & ZEND_ACC_CALL_VIA_TRAMPOLINE))) {
3612 zend_copy_extra_args(EXECUTE_DATA_C);
3613 }
3614 } else if (EXPECTED((op_array->fn_flags & ZEND_ACC_HAS_TYPE_HINTS) == 0)) {
3615 /* Skip useless ZEND_RECV and ZEND_RECV_INIT opcodes */
3616 #if defined(ZEND_VM_IP_GLOBAL_REG) && ((ZEND_VM_KIND == ZEND_VM_KIND_CALL) || (ZEND_VM_KIND == ZEND_VM_KIND_HYBRID))
3617 opline += num_args;
3618 #else
3619 EX(opline) += num_args;
3620 #endif
3621 }
3622
3623 /* Initialize CV variables (skip arguments) */
3624 zend_init_cvs(num_args, op_array->last_var EXECUTE_DATA_CC);
3625
3626 EX(run_time_cache) = RUN_TIME_CACHE(op_array);
3627
3628 EG(current_execute_data) = execute_data;
3629 }
3630 /* }}} */
3631
init_func_run_time_cache_i(zend_op_array * op_array)3632 static zend_always_inline void init_func_run_time_cache_i(zend_op_array *op_array) /* {{{ */
3633 {
3634 void **run_time_cache;
3635
3636 ZEND_ASSERT(RUN_TIME_CACHE(op_array) == NULL);
3637 run_time_cache = zend_arena_alloc(&CG(arena), op_array->cache_size);
3638 memset(run_time_cache, 0, op_array->cache_size);
3639 ZEND_MAP_PTR_SET(op_array->run_time_cache, run_time_cache);
3640 }
3641 /* }}} */
3642
init_func_run_time_cache(zend_op_array * op_array)3643 static zend_never_inline void ZEND_FASTCALL init_func_run_time_cache(zend_op_array *op_array) /* {{{ */
3644 {
3645 init_func_run_time_cache_i(op_array);
3646 }
3647 /* }}} */
3648
zend_fetch_function(zend_string * name)3649 ZEND_API zend_function * ZEND_FASTCALL zend_fetch_function(zend_string *name) /* {{{ */
3650 {
3651 zval *zv = zend_hash_find(EG(function_table), name);
3652
3653 if (EXPECTED(zv != NULL)) {
3654 zend_function *fbc = Z_FUNC_P(zv);
3655
3656 if (EXPECTED(fbc->type == ZEND_USER_FUNCTION) && UNEXPECTED(!RUN_TIME_CACHE(&fbc->op_array))) {
3657 init_func_run_time_cache_i(&fbc->op_array);
3658 }
3659 return fbc;
3660 }
3661 return NULL;
3662 } /* }}} */
3663
zend_fetch_function_str(const char * name,size_t len)3664 ZEND_API zend_function * ZEND_FASTCALL zend_fetch_function_str(const char *name, size_t len) /* {{{ */
3665 {
3666 zval *zv = zend_hash_str_find(EG(function_table), name, len);
3667
3668 if (EXPECTED(zv != NULL)) {
3669 zend_function *fbc = Z_FUNC_P(zv);
3670
3671 if (EXPECTED(fbc->type == ZEND_USER_FUNCTION) && UNEXPECTED(!RUN_TIME_CACHE(&fbc->op_array))) {
3672 init_func_run_time_cache_i(&fbc->op_array);
3673 }
3674 return fbc;
3675 }
3676 return NULL;
3677 } /* }}} */
3678
zend_init_func_run_time_cache(zend_op_array * op_array)3679 ZEND_API void ZEND_FASTCALL zend_init_func_run_time_cache(zend_op_array *op_array) /* {{{ */
3680 {
3681 if (!RUN_TIME_CACHE(op_array)) {
3682 init_func_run_time_cache_i(op_array);
3683 }
3684 } /* }}} */
3685
i_init_code_execute_data(zend_execute_data * execute_data,zend_op_array * op_array,zval * return_value)3686 static zend_always_inline void i_init_code_execute_data(zend_execute_data *execute_data, zend_op_array *op_array, zval *return_value) /* {{{ */
3687 {
3688 ZEND_ASSERT(EX(func) == (zend_function*)op_array);
3689
3690 EX(opline) = op_array->opcodes;
3691 EX(call) = NULL;
3692 EX(return_value) = return_value;
3693
3694 zend_attach_symbol_table(execute_data);
3695
3696 if (!ZEND_MAP_PTR(op_array->run_time_cache)) {
3697 void *ptr;
3698
3699 ZEND_ASSERT(op_array->fn_flags & ZEND_ACC_HEAP_RT_CACHE);
3700 ptr = emalloc(op_array->cache_size + sizeof(void*));
3701 ZEND_MAP_PTR_INIT(op_array->run_time_cache, ptr);
3702 ptr = (char*)ptr + sizeof(void*);
3703 ZEND_MAP_PTR_SET(op_array->run_time_cache, ptr);
3704 memset(ptr, 0, op_array->cache_size);
3705 }
3706 EX(run_time_cache) = RUN_TIME_CACHE(op_array);
3707
3708 EG(current_execute_data) = execute_data;
3709 }
3710 /* }}} */
3711
zend_init_func_execute_data(zend_execute_data * ex,zend_op_array * op_array,zval * return_value)3712 ZEND_API void zend_init_func_execute_data(zend_execute_data *ex, zend_op_array *op_array, zval *return_value) /* {{{ */
3713 {
3714 #if defined(ZEND_VM_FP_GLOBAL_REG) && ((ZEND_VM_KIND == ZEND_VM_KIND_CALL) || (ZEND_VM_KIND == ZEND_VM_KIND_HYBRID))
3715 zend_execute_data *orig_execute_data = execute_data;
3716 #endif
3717 #if defined(ZEND_VM_IP_GLOBAL_REG) && ((ZEND_VM_KIND == ZEND_VM_KIND_CALL) || (ZEND_VM_KIND == ZEND_VM_KIND_HYBRID))
3718 const zend_op *orig_opline = opline;
3719 #endif
3720 #if defined(ZEND_VM_FP_GLOBAL_REG) && ((ZEND_VM_KIND == ZEND_VM_KIND_CALL) || (ZEND_VM_KIND == ZEND_VM_KIND_HYBRID))
3721 execute_data = ex;
3722 #else
3723 zend_execute_data *execute_data = ex;
3724 #endif
3725
3726 EX(prev_execute_data) = EG(current_execute_data);
3727 if (!RUN_TIME_CACHE(op_array)) {
3728 init_func_run_time_cache(op_array);
3729 }
3730 i_init_func_execute_data(op_array, return_value, 1 EXECUTE_DATA_CC);
3731
3732 #if defined(ZEND_VM_IP_GLOBAL_REG) && ((ZEND_VM_KIND == ZEND_VM_KIND_CALL) || (ZEND_VM_KIND == ZEND_VM_KIND_HYBRID))
3733 EX(opline) = opline;
3734 opline = orig_opline;
3735 #endif
3736 #if defined(ZEND_VM_FP_GLOBAL_REG) && ((ZEND_VM_KIND == ZEND_VM_KIND_CALL) || (ZEND_VM_KIND == ZEND_VM_KIND_HYBRID))
3737 execute_data = orig_execute_data;
3738 #endif
3739 }
3740 /* }}} */
3741
zend_init_code_execute_data(zend_execute_data * execute_data,zend_op_array * op_array,zval * return_value)3742 ZEND_API void zend_init_code_execute_data(zend_execute_data *execute_data, zend_op_array *op_array, zval *return_value) /* {{{ */
3743 {
3744 EX(prev_execute_data) = EG(current_execute_data);
3745 i_init_code_execute_data(execute_data, op_array, return_value);
3746 }
3747 /* }}} */
3748
zend_init_execute_data(zend_execute_data * execute_data,zend_op_array * op_array,zval * return_value)3749 ZEND_API void zend_init_execute_data(zend_execute_data *execute_data, zend_op_array *op_array, zval *return_value) /* {{{ */
3750 {
3751 if (EX_CALL_INFO() & ZEND_CALL_HAS_SYMBOL_TABLE) {
3752 zend_init_code_execute_data(execute_data, op_array, return_value);
3753 } else {
3754 zend_init_func_execute_data(execute_data, op_array, return_value);
3755 }
3756 }
3757 /* }}} */
3758
zend_vm_stack_copy_call_frame(zend_execute_data * call,uint32_t passed_args,uint32_t additional_args)3759 static zend_execute_data *zend_vm_stack_copy_call_frame(zend_execute_data *call, uint32_t passed_args, uint32_t additional_args) /* {{{ */
3760 {
3761 zend_execute_data *new_call;
3762 int used_stack = (EG(vm_stack_top) - (zval*)call) + additional_args;
3763
3764 /* copy call frame into new stack segment */
3765 new_call = zend_vm_stack_extend(used_stack * sizeof(zval));
3766 *new_call = *call;
3767 ZEND_ADD_CALL_FLAG(new_call, ZEND_CALL_ALLOCATED);
3768
3769 if (passed_args) {
3770 zval *src = ZEND_CALL_ARG(call, 1);
3771 zval *dst = ZEND_CALL_ARG(new_call, 1);
3772 do {
3773 ZVAL_COPY_VALUE(dst, src);
3774 passed_args--;
3775 src++;
3776 dst++;
3777 } while (passed_args);
3778 }
3779
3780 /* delete old call_frame from previous stack segment */
3781 EG(vm_stack)->prev->top = (zval*)call;
3782
3783 /* delete previous stack segment if it became empty */
3784 if (UNEXPECTED(EG(vm_stack)->prev->top == ZEND_VM_STACK_ELEMENTS(EG(vm_stack)->prev))) {
3785 zend_vm_stack r = EG(vm_stack)->prev;
3786
3787 EG(vm_stack)->prev = r->prev;
3788 efree(r);
3789 }
3790
3791 return new_call;
3792 }
3793 /* }}} */
3794
zend_vm_stack_extend_call_frame(zend_execute_data ** call,uint32_t passed_args,uint32_t additional_args)3795 static zend_always_inline void zend_vm_stack_extend_call_frame(zend_execute_data **call, uint32_t passed_args, uint32_t additional_args) /* {{{ */
3796 {
3797 if (EXPECTED((uint32_t)(EG(vm_stack_end) - EG(vm_stack_top)) > additional_args)) {
3798 EG(vm_stack_top) += additional_args;
3799 } else {
3800 *call = zend_vm_stack_copy_call_frame(*call, passed_args, additional_args);
3801 }
3802 }
3803 /* }}} */
3804
zend_get_running_generator(EXECUTE_DATA_D)3805 static zend_always_inline zend_generator *zend_get_running_generator(EXECUTE_DATA_D) /* {{{ */
3806 {
3807 /* The generator object is stored in EX(return_value) */
3808 zend_generator *generator = (zend_generator *) EX(return_value);
3809 /* However control may currently be delegated to another generator.
3810 * That's the one we're interested in. */
3811 return generator;
3812 }
3813 /* }}} */
3814
cleanup_unfinished_calls(zend_execute_data * execute_data,uint32_t op_num)3815 static void cleanup_unfinished_calls(zend_execute_data *execute_data, uint32_t op_num) /* {{{ */
3816 {
3817 if (UNEXPECTED(EX(call))) {
3818 zend_execute_data *call = EX(call);
3819 zend_op *opline = EX(func)->op_array.opcodes + op_num;
3820 int level;
3821 int do_exit;
3822
3823 if (UNEXPECTED(opline->opcode == ZEND_INIT_FCALL ||
3824 opline->opcode == ZEND_INIT_FCALL_BY_NAME ||
3825 opline->opcode == ZEND_INIT_NS_FCALL_BY_NAME ||
3826 opline->opcode == ZEND_INIT_DYNAMIC_CALL ||
3827 opline->opcode == ZEND_INIT_USER_CALL ||
3828 opline->opcode == ZEND_INIT_METHOD_CALL ||
3829 opline->opcode == ZEND_INIT_STATIC_METHOD_CALL ||
3830 opline->opcode == ZEND_NEW)) {
3831 ZEND_ASSERT(op_num);
3832 opline--;
3833 }
3834
3835 do {
3836 /* If the exception was thrown during a function call there might be
3837 * arguments pushed to the stack that have to be dtor'ed. */
3838
3839 /* find the number of actually passed arguments */
3840 level = 0;
3841 do_exit = 0;
3842 do {
3843 switch (opline->opcode) {
3844 case ZEND_DO_FCALL:
3845 case ZEND_DO_ICALL:
3846 case ZEND_DO_UCALL:
3847 case ZEND_DO_FCALL_BY_NAME:
3848 level++;
3849 break;
3850 case ZEND_INIT_FCALL:
3851 case ZEND_INIT_FCALL_BY_NAME:
3852 case ZEND_INIT_NS_FCALL_BY_NAME:
3853 case ZEND_INIT_DYNAMIC_CALL:
3854 case ZEND_INIT_USER_CALL:
3855 case ZEND_INIT_METHOD_CALL:
3856 case ZEND_INIT_STATIC_METHOD_CALL:
3857 case ZEND_NEW:
3858 if (level == 0) {
3859 ZEND_CALL_NUM_ARGS(call) = 0;
3860 do_exit = 1;
3861 }
3862 level--;
3863 break;
3864 case ZEND_SEND_VAL:
3865 case ZEND_SEND_VAL_EX:
3866 case ZEND_SEND_VAR:
3867 case ZEND_SEND_VAR_EX:
3868 case ZEND_SEND_FUNC_ARG:
3869 case ZEND_SEND_REF:
3870 case ZEND_SEND_VAR_NO_REF:
3871 case ZEND_SEND_VAR_NO_REF_EX:
3872 case ZEND_SEND_USER:
3873 if (level == 0) {
3874 ZEND_CALL_NUM_ARGS(call) = opline->op2.num;
3875 do_exit = 1;
3876 }
3877 break;
3878 case ZEND_SEND_ARRAY:
3879 case ZEND_SEND_UNPACK:
3880 if (level == 0) {
3881 do_exit = 1;
3882 }
3883 break;
3884 }
3885 if (!do_exit) {
3886 opline--;
3887 }
3888 } while (!do_exit);
3889 if (call->prev_execute_data) {
3890 /* skip current call region */
3891 level = 0;
3892 do_exit = 0;
3893 do {
3894 switch (opline->opcode) {
3895 case ZEND_DO_FCALL:
3896 case ZEND_DO_ICALL:
3897 case ZEND_DO_UCALL:
3898 case ZEND_DO_FCALL_BY_NAME:
3899 level++;
3900 break;
3901 case ZEND_INIT_FCALL:
3902 case ZEND_INIT_FCALL_BY_NAME:
3903 case ZEND_INIT_NS_FCALL_BY_NAME:
3904 case ZEND_INIT_DYNAMIC_CALL:
3905 case ZEND_INIT_USER_CALL:
3906 case ZEND_INIT_METHOD_CALL:
3907 case ZEND_INIT_STATIC_METHOD_CALL:
3908 case ZEND_NEW:
3909 if (level == 0) {
3910 do_exit = 1;
3911 }
3912 level--;
3913 break;
3914 }
3915 opline--;
3916 } while (!do_exit);
3917 }
3918
3919 zend_vm_stack_free_args(EX(call));
3920
3921 if (ZEND_CALL_INFO(call) & ZEND_CALL_RELEASE_THIS) {
3922 OBJ_RELEASE(Z_OBJ(call->This));
3923 }
3924 if (call->func->common.fn_flags & ZEND_ACC_CLOSURE) {
3925 zend_object_release(ZEND_CLOSURE_OBJECT(call->func));
3926 } else if (call->func->common.fn_flags & ZEND_ACC_CALL_VIA_TRAMPOLINE) {
3927 zend_string_release_ex(call->func->common.function_name, 0);
3928 zend_free_trampoline(call->func);
3929 }
3930
3931 EX(call) = call->prev_execute_data;
3932 zend_vm_stack_free_call_frame(call);
3933 call = EX(call);
3934 } while (call);
3935 }
3936 }
3937 /* }}} */
3938
find_live_range(const zend_op_array * op_array,uint32_t op_num,uint32_t var_num)3939 static const zend_live_range *find_live_range(const zend_op_array *op_array, uint32_t op_num, uint32_t var_num) /* {{{ */
3940 {
3941 int i;
3942 for (i = 0; i < op_array->last_live_range; i++) {
3943 const zend_live_range *range = &op_array->live_range[i];
3944 if (op_num >= range->start && op_num < range->end
3945 && var_num == (range->var & ~ZEND_LIVE_MASK)) {
3946 return range;
3947 }
3948 }
3949 return NULL;
3950 }
3951 /* }}} */
3952
cleanup_live_vars(zend_execute_data * execute_data,uint32_t op_num,uint32_t catch_op_num)3953 static void cleanup_live_vars(zend_execute_data *execute_data, uint32_t op_num, uint32_t catch_op_num) /* {{{ */
3954 {
3955 int i;
3956
3957 for (i = 0; i < EX(func)->op_array.last_live_range; i++) {
3958 const zend_live_range *range = &EX(func)->op_array.live_range[i];
3959 if (range->start > op_num) {
3960 /* further blocks will not be relevant... */
3961 break;
3962 } else if (op_num < range->end) {
3963 if (!catch_op_num || catch_op_num >= range->end) {
3964 uint32_t kind = range->var & ZEND_LIVE_MASK;
3965 uint32_t var_num = range->var & ~ZEND_LIVE_MASK;
3966 zval *var = EX_VAR(var_num);
3967
3968 if (kind == ZEND_LIVE_TMPVAR) {
3969 zval_ptr_dtor_nogc(var);
3970 } else if (kind == ZEND_LIVE_NEW) {
3971 zend_object *obj;
3972 ZEND_ASSERT(Z_TYPE_P(var) == IS_OBJECT);
3973 obj = Z_OBJ_P(var);
3974 zend_object_store_ctor_failed(obj);
3975 OBJ_RELEASE(obj);
3976 } else if (kind == ZEND_LIVE_LOOP) {
3977 if (Z_TYPE_P(var) != IS_ARRAY && Z_FE_ITER_P(var) != (uint32_t)-1) {
3978 zend_hash_iterator_del(Z_FE_ITER_P(var));
3979 }
3980 zval_ptr_dtor_nogc(var);
3981 } else if (kind == ZEND_LIVE_ROPE) {
3982 zend_string **rope = (zend_string **)var;
3983 zend_op *last = EX(func)->op_array.opcodes + op_num;
3984 while ((last->opcode != ZEND_ROPE_ADD && last->opcode != ZEND_ROPE_INIT)
3985 || last->result.var != var_num) {
3986 ZEND_ASSERT(last >= EX(func)->op_array.opcodes);
3987 last--;
3988 }
3989 if (last->opcode == ZEND_ROPE_INIT) {
3990 zend_string_release_ex(*rope, 0);
3991 } else {
3992 int j = last->extended_value;
3993 do {
3994 zend_string_release_ex(rope[j], 0);
3995 } while (j--);
3996 }
3997 } else if (kind == ZEND_LIVE_SILENCE) {
3998 /* restore previous error_reporting value */
3999 if (!EG(error_reporting) && Z_LVAL_P(var) != 0) {
4000 EG(error_reporting) = Z_LVAL_P(var);
4001 }
4002 }
4003 }
4004 }
4005 }
4006 }
4007 /* }}} */
4008
zend_cleanup_unfinished_execution(zend_execute_data * execute_data,uint32_t op_num,uint32_t catch_op_num)4009 ZEND_API void zend_cleanup_unfinished_execution(zend_execute_data *execute_data, uint32_t op_num, uint32_t catch_op_num) {
4010 cleanup_unfinished_calls(execute_data, op_num);
4011 cleanup_live_vars(execute_data, op_num, catch_op_num);
4012 }
4013
4014 #if ZEND_VM_SPEC
zend_swap_operands(zend_op * op)4015 static void zend_swap_operands(zend_op *op) /* {{{ */
4016 {
4017 znode_op tmp;
4018 zend_uchar tmp_type;
4019
4020 tmp = op->op1;
4021 tmp_type = op->op1_type;
4022 op->op1 = op->op2;
4023 op->op1_type = op->op2_type;
4024 op->op2 = tmp;
4025 op->op2_type = tmp_type;
4026 }
4027 /* }}} */
4028 #endif
4029
zend_init_dynamic_call_string(zend_string * function,uint32_t num_args)4030 static zend_never_inline zend_execute_data *zend_init_dynamic_call_string(zend_string *function, uint32_t num_args) /* {{{ */
4031 {
4032 zend_function *fbc;
4033 zval *func;
4034 zend_class_entry *called_scope;
4035 zend_string *lcname;
4036 const char *colon;
4037
4038 if ((colon = zend_memrchr(ZSTR_VAL(function), ':', ZSTR_LEN(function))) != NULL &&
4039 colon > ZSTR_VAL(function) &&
4040 *(colon-1) == ':'
4041 ) {
4042 zend_string *mname;
4043 size_t cname_length = colon - ZSTR_VAL(function) - 1;
4044 size_t mname_length = ZSTR_LEN(function) - cname_length - (sizeof("::") - 1);
4045
4046 lcname = zend_string_init(ZSTR_VAL(function), cname_length, 0);
4047
4048 called_scope = zend_fetch_class_by_name(lcname, NULL, ZEND_FETCH_CLASS_DEFAULT | ZEND_FETCH_CLASS_EXCEPTION);
4049 if (UNEXPECTED(called_scope == NULL)) {
4050 zend_string_release_ex(lcname, 0);
4051 return NULL;
4052 }
4053
4054 mname = zend_string_init(ZSTR_VAL(function) + (cname_length + sizeof("::") - 1), mname_length, 0);
4055
4056 if (called_scope->get_static_method) {
4057 fbc = called_scope->get_static_method(called_scope, mname);
4058 } else {
4059 fbc = zend_std_get_static_method(called_scope, mname, NULL);
4060 }
4061 if (UNEXPECTED(fbc == NULL)) {
4062 if (EXPECTED(!EG(exception))) {
4063 zend_undefined_method(called_scope, mname);
4064 }
4065 zend_string_release_ex(lcname, 0);
4066 zend_string_release_ex(mname, 0);
4067 return NULL;
4068 }
4069
4070 zend_string_release_ex(lcname, 0);
4071 zend_string_release_ex(mname, 0);
4072
4073 if (UNEXPECTED(!(fbc->common.fn_flags & ZEND_ACC_STATIC))) {
4074 zend_non_static_method_call(fbc);
4075 if (UNEXPECTED(EG(exception) != NULL)) {
4076 return NULL;
4077 }
4078 }
4079 if (EXPECTED(fbc->type == ZEND_USER_FUNCTION) && UNEXPECTED(!RUN_TIME_CACHE(&fbc->op_array))) {
4080 init_func_run_time_cache(&fbc->op_array);
4081 }
4082 } else {
4083 if (ZSTR_VAL(function)[0] == '\\') {
4084 lcname = zend_string_alloc(ZSTR_LEN(function) - 1, 0);
4085 zend_str_tolower_copy(ZSTR_VAL(lcname), ZSTR_VAL(function) + 1, ZSTR_LEN(function) - 1);
4086 } else {
4087 lcname = zend_string_tolower(function);
4088 }
4089 if (UNEXPECTED((func = zend_hash_find(EG(function_table), lcname)) == NULL)) {
4090 zend_throw_error(NULL, "Call to undefined function %s()", ZSTR_VAL(function));
4091 zend_string_release_ex(lcname, 0);
4092 return NULL;
4093 }
4094 zend_string_release_ex(lcname, 0);
4095
4096 fbc = Z_FUNC_P(func);
4097 if (EXPECTED(fbc->type == ZEND_USER_FUNCTION) && UNEXPECTED(!RUN_TIME_CACHE(&fbc->op_array))) {
4098 init_func_run_time_cache(&fbc->op_array);
4099 }
4100 called_scope = NULL;
4101 }
4102
4103 return zend_vm_stack_push_call_frame(ZEND_CALL_NESTED_FUNCTION | ZEND_CALL_DYNAMIC,
4104 fbc, num_args, called_scope);
4105 }
4106 /* }}} */
4107
zend_init_dynamic_call_object(zval * function,uint32_t num_args)4108 static zend_never_inline zend_execute_data *zend_init_dynamic_call_object(zval *function, uint32_t num_args) /* {{{ */
4109 {
4110 zend_function *fbc;
4111 void *object_or_called_scope;
4112 zend_class_entry *called_scope;
4113 zend_object *object;
4114 uint32_t call_info = ZEND_CALL_NESTED_FUNCTION | ZEND_CALL_DYNAMIC;
4115
4116 if (EXPECTED(Z_OBJ_HANDLER_P(function, get_closure)) &&
4117 EXPECTED(Z_OBJ_HANDLER_P(function, get_closure)(function, &called_scope, &fbc, &object) == SUCCESS)) {
4118
4119 object_or_called_scope = called_scope;
4120 if (fbc->common.fn_flags & ZEND_ACC_CLOSURE) {
4121 /* Delay closure destruction until its invocation */
4122 GC_ADDREF(ZEND_CLOSURE_OBJECT(fbc));
4123 call_info |= ZEND_CALL_CLOSURE;
4124 if (fbc->common.fn_flags & ZEND_ACC_FAKE_CLOSURE) {
4125 call_info |= ZEND_CALL_FAKE_CLOSURE;
4126 }
4127 if (object) {
4128 call_info |= ZEND_CALL_HAS_THIS;
4129 object_or_called_scope = object;
4130 }
4131 } else if (object) {
4132 call_info |= ZEND_CALL_RELEASE_THIS | ZEND_CALL_HAS_THIS;
4133 GC_ADDREF(object); /* For $this pointer */
4134 object_or_called_scope = object;
4135 }
4136 } else {
4137 zend_throw_error(NULL, "Function name must be a string");
4138 return NULL;
4139 }
4140
4141 if (EXPECTED(fbc->type == ZEND_USER_FUNCTION) && UNEXPECTED(!RUN_TIME_CACHE(&fbc->op_array))) {
4142 init_func_run_time_cache(&fbc->op_array);
4143 }
4144
4145 return zend_vm_stack_push_call_frame(call_info,
4146 fbc, num_args, object_or_called_scope);
4147 }
4148 /* }}} */
4149
zend_init_dynamic_call_array(zend_array * function,uint32_t num_args)4150 static zend_never_inline zend_execute_data *zend_init_dynamic_call_array(zend_array *function, uint32_t num_args) /* {{{ */
4151 {
4152 zend_function *fbc;
4153 void *object_or_called_scope;
4154 uint32_t call_info = ZEND_CALL_NESTED_FUNCTION | ZEND_CALL_DYNAMIC;
4155
4156 if (zend_hash_num_elements(function) == 2) {
4157 zval *obj;
4158 zval *method;
4159 obj = zend_hash_index_find(function, 0);
4160 method = zend_hash_index_find(function, 1);
4161
4162 if (UNEXPECTED(!obj) || UNEXPECTED(!method)) {
4163 zend_throw_error(NULL, "Array callback has to contain indices 0 and 1");
4164 return NULL;
4165 }
4166
4167 ZVAL_DEREF(obj);
4168 if (UNEXPECTED(Z_TYPE_P(obj) != IS_STRING) && UNEXPECTED(Z_TYPE_P(obj) != IS_OBJECT)) {
4169 zend_throw_error(NULL, "First array member is not a valid class name or object");
4170 return NULL;
4171 }
4172
4173 ZVAL_DEREF(method);
4174 if (UNEXPECTED(Z_TYPE_P(method) != IS_STRING)) {
4175 zend_throw_error(NULL, "Second array member is not a valid method");
4176 return NULL;
4177 }
4178
4179 if (Z_TYPE_P(obj) == IS_STRING) {
4180 zend_class_entry *called_scope = zend_fetch_class_by_name(Z_STR_P(obj), NULL, ZEND_FETCH_CLASS_DEFAULT | ZEND_FETCH_CLASS_EXCEPTION);
4181
4182 if (UNEXPECTED(called_scope == NULL)) {
4183 return NULL;
4184 }
4185
4186 if (called_scope->get_static_method) {
4187 fbc = called_scope->get_static_method(called_scope, Z_STR_P(method));
4188 } else {
4189 fbc = zend_std_get_static_method(called_scope, Z_STR_P(method), NULL);
4190 }
4191 if (UNEXPECTED(fbc == NULL)) {
4192 if (EXPECTED(!EG(exception))) {
4193 zend_undefined_method(called_scope, Z_STR_P(method));
4194 }
4195 return NULL;
4196 }
4197 if (!(fbc->common.fn_flags & ZEND_ACC_STATIC)) {
4198 zend_non_static_method_call(fbc);
4199 if (UNEXPECTED(EG(exception) != NULL)) {
4200 return NULL;
4201 }
4202 }
4203 object_or_called_scope = called_scope;
4204 } else {
4205 zend_object *object = Z_OBJ_P(obj);
4206
4207 fbc = Z_OBJ_HT_P(obj)->get_method(&object, Z_STR_P(method), NULL);
4208 if (UNEXPECTED(fbc == NULL)) {
4209 if (EXPECTED(!EG(exception))) {
4210 zend_undefined_method(object->ce, Z_STR_P(method));
4211 }
4212 return NULL;
4213 }
4214
4215 if ((fbc->common.fn_flags & ZEND_ACC_STATIC) != 0) {
4216 object_or_called_scope = object->ce;
4217 } else {
4218 call_info |= ZEND_CALL_RELEASE_THIS | ZEND_CALL_HAS_THIS;
4219 GC_ADDREF(object); /* For $this pointer */
4220 object_or_called_scope = object;
4221 }
4222 }
4223 } else {
4224 zend_throw_error(NULL, "Function name must be a string");
4225 return NULL;
4226 }
4227
4228 if (EXPECTED(fbc->type == ZEND_USER_FUNCTION) && UNEXPECTED(!RUN_TIME_CACHE(&fbc->op_array))) {
4229 init_func_run_time_cache(&fbc->op_array);
4230 }
4231
4232 return zend_vm_stack_push_call_frame(call_info,
4233 fbc, num_args, object_or_called_scope);
4234 }
4235 /* }}} */
4236
4237 #define ZEND_FAKE_OP_ARRAY ((zend_op_array*)(zend_intptr_t)-1)
4238
zend_include_or_eval(zval * inc_filename,int type)4239 static zend_never_inline zend_op_array* ZEND_FASTCALL zend_include_or_eval(zval *inc_filename, int type) /* {{{ */
4240 {
4241 zend_op_array *new_op_array = NULL;
4242 zval tmp_inc_filename;
4243
4244 ZVAL_UNDEF(&tmp_inc_filename);
4245 if (Z_TYPE_P(inc_filename) != IS_STRING) {
4246 zend_string *tmp = zval_try_get_string_func(inc_filename);
4247
4248 if (UNEXPECTED(!tmp)) {
4249 return NULL;
4250 }
4251 ZVAL_STR(&tmp_inc_filename, tmp);
4252 inc_filename = &tmp_inc_filename;
4253 }
4254
4255 switch (type) {
4256 case ZEND_INCLUDE_ONCE:
4257 case ZEND_REQUIRE_ONCE: {
4258 zend_file_handle file_handle;
4259 zend_string *resolved_path;
4260
4261 resolved_path = zend_resolve_path(Z_STRVAL_P(inc_filename), Z_STRLEN_P(inc_filename));
4262 if (EXPECTED(resolved_path)) {
4263 if (zend_hash_exists(&EG(included_files), resolved_path)) {
4264 goto already_compiled;
4265 }
4266 } else if (UNEXPECTED(EG(exception))) {
4267 break;
4268 } else if (UNEXPECTED(strlen(Z_STRVAL_P(inc_filename)) != Z_STRLEN_P(inc_filename))) {
4269 zend_message_dispatcher(
4270 (type == ZEND_INCLUDE_ONCE) ?
4271 ZMSG_FAILED_INCLUDE_FOPEN : ZMSG_FAILED_REQUIRE_FOPEN,
4272 Z_STRVAL_P(inc_filename));
4273 break;
4274 } else {
4275 resolved_path = zend_string_copy(Z_STR_P(inc_filename));
4276 }
4277
4278 if (SUCCESS == zend_stream_open(ZSTR_VAL(resolved_path), &file_handle)) {
4279
4280 if (!file_handle.opened_path) {
4281 file_handle.opened_path = zend_string_copy(resolved_path);
4282 }
4283
4284 if (zend_hash_add_empty_element(&EG(included_files), file_handle.opened_path)) {
4285 zend_op_array *op_array = zend_compile_file(&file_handle, (type==ZEND_INCLUDE_ONCE?ZEND_INCLUDE:ZEND_REQUIRE));
4286 zend_destroy_file_handle(&file_handle);
4287 zend_string_release_ex(resolved_path, 0);
4288 if (Z_TYPE(tmp_inc_filename) != IS_UNDEF) {
4289 zval_ptr_dtor_str(&tmp_inc_filename);
4290 }
4291 return op_array;
4292 } else {
4293 zend_file_handle_dtor(&file_handle);
4294 already_compiled:
4295 new_op_array = ZEND_FAKE_OP_ARRAY;
4296 }
4297 } else {
4298 zend_message_dispatcher(
4299 (type == ZEND_INCLUDE_ONCE) ?
4300 ZMSG_FAILED_INCLUDE_FOPEN : ZMSG_FAILED_REQUIRE_FOPEN,
4301 Z_STRVAL_P(inc_filename));
4302 }
4303 zend_string_release_ex(resolved_path, 0);
4304 }
4305 break;
4306 case ZEND_INCLUDE:
4307 case ZEND_REQUIRE:
4308 if (UNEXPECTED(strlen(Z_STRVAL_P(inc_filename)) != Z_STRLEN_P(inc_filename))) {
4309 zend_message_dispatcher(
4310 (type == ZEND_INCLUDE) ?
4311 ZMSG_FAILED_INCLUDE_FOPEN : ZMSG_FAILED_REQUIRE_FOPEN,
4312 Z_STRVAL_P(inc_filename));
4313 break;
4314 }
4315 new_op_array = compile_filename(type, inc_filename);
4316 break;
4317 case ZEND_EVAL: {
4318 char *eval_desc = zend_make_compiled_string_description("eval()'d code");
4319 new_op_array = zend_compile_string(inc_filename, eval_desc);
4320 efree(eval_desc);
4321 }
4322 break;
4323 EMPTY_SWITCH_DEFAULT_CASE()
4324 }
4325
4326 if (Z_TYPE(tmp_inc_filename) != IS_UNDEF) {
4327 zval_ptr_dtor_str(&tmp_inc_filename);
4328 }
4329 return new_op_array;
4330 }
4331 /* }}} */
4332
zend_do_fcall_overloaded(zend_execute_data * call,zval * ret)4333 static ZEND_COLD int ZEND_FASTCALL zend_do_fcall_overloaded(zend_execute_data *call, zval *ret) /* {{{ */
4334 {
4335 zend_function *fbc = call->func;
4336 zend_object *object;
4337
4338 /* Not sure what should be done here if it's a static method */
4339 if (UNEXPECTED(Z_TYPE(call->This) != IS_OBJECT)) {
4340 zend_vm_stack_free_args(call);
4341 if (fbc->type == ZEND_OVERLOADED_FUNCTION_TEMPORARY) {
4342 zend_string_release_ex(fbc->common.function_name, 0);
4343 }
4344 efree(fbc);
4345 zend_vm_stack_free_call_frame(call);
4346
4347 zend_throw_error(NULL, "Cannot call overloaded function for non-object");
4348 return 0;
4349 }
4350
4351 object = Z_OBJ(call->This);
4352
4353 ZVAL_NULL(ret);
4354
4355 EG(current_execute_data) = call;
4356 object->handlers->call_method(fbc->common.function_name, object, call, ret);
4357 EG(current_execute_data) = call->prev_execute_data;
4358
4359 zend_vm_stack_free_args(call);
4360
4361 if (fbc->type == ZEND_OVERLOADED_FUNCTION_TEMPORARY) {
4362 zend_string_release_ex(fbc->common.function_name, 0);
4363 }
4364 efree(fbc);
4365
4366 return 1;
4367 }
4368 /* }}} */
4369
zend_fe_reset_iterator(zval * array_ptr,int by_ref OPLINE_DC EXECUTE_DATA_DC)4370 static zend_never_inline zend_bool ZEND_FASTCALL zend_fe_reset_iterator(zval *array_ptr, int by_ref OPLINE_DC EXECUTE_DATA_DC) /* {{{ */
4371 {
4372 zend_class_entry *ce = Z_OBJCE_P(array_ptr);
4373 zend_object_iterator *iter = ce->get_iterator(ce, array_ptr, by_ref);
4374 zend_bool is_empty;
4375
4376 if (UNEXPECTED(!iter) || UNEXPECTED(EG(exception))) {
4377 if (iter) {
4378 OBJ_RELEASE(&iter->std);
4379 }
4380 if (!EG(exception)) {
4381 zend_throw_exception_ex(NULL, 0, "Object of type %s did not create an Iterator", ZSTR_VAL(ce->name));
4382 }
4383 ZVAL_UNDEF(EX_VAR(opline->result.var));
4384 return 1;
4385 }
4386
4387 iter->index = 0;
4388 if (iter->funcs->rewind) {
4389 iter->funcs->rewind(iter);
4390 if (UNEXPECTED(EG(exception) != NULL)) {
4391 OBJ_RELEASE(&iter->std);
4392 ZVAL_UNDEF(EX_VAR(opline->result.var));
4393 return 1;
4394 }
4395 }
4396
4397 is_empty = iter->funcs->valid(iter) != SUCCESS;
4398
4399 if (UNEXPECTED(EG(exception) != NULL)) {
4400 OBJ_RELEASE(&iter->std);
4401 ZVAL_UNDEF(EX_VAR(opline->result.var));
4402 return 1;
4403 }
4404 iter->index = -1; /* will be set to 0 before using next handler */
4405
4406 ZVAL_OBJ(EX_VAR(opline->result.var), &iter->std);
4407 Z_FE_ITER_P(EX_VAR(opline->result.var)) = (uint32_t)-1;
4408
4409 return is_empty;
4410 }
4411 /* }}} */
4412
_zend_quick_get_constant(const zval * key,uint32_t flags,int check_defined_only OPLINE_DC EXECUTE_DATA_DC)4413 static zend_always_inline int _zend_quick_get_constant(
4414 const zval *key, uint32_t flags, int check_defined_only OPLINE_DC EXECUTE_DATA_DC) /* {{{ */
4415 {
4416 zval *zv;
4417 const zval *orig_key = key;
4418 zend_constant *c = NULL;
4419
4420 zv = zend_hash_find_ex(EG(zend_constants), Z_STR_P(key), 1);
4421 if (zv) {
4422 c = (zend_constant*)Z_PTR_P(zv);
4423 } else {
4424 key++;
4425 zv = zend_hash_find_ex(EG(zend_constants), Z_STR_P(key), 1);
4426 if (zv && (ZEND_CONSTANT_FLAGS((zend_constant*)Z_PTR_P(zv)) & CONST_CS) == 0) {
4427 c = (zend_constant*)Z_PTR_P(zv);
4428 } else {
4429 if ((flags & (IS_CONSTANT_IN_NAMESPACE|IS_CONSTANT_UNQUALIFIED)) == (IS_CONSTANT_IN_NAMESPACE|IS_CONSTANT_UNQUALIFIED)) {
4430 key++;
4431 zv = zend_hash_find_ex(EG(zend_constants), Z_STR_P(key), 1);
4432 if (zv) {
4433 c = (zend_constant*)Z_PTR_P(zv);
4434 } else {
4435 key++;
4436 zv = zend_hash_find_ex(EG(zend_constants), Z_STR_P(key), 1);
4437 if (zv && (ZEND_CONSTANT_FLAGS((zend_constant*)Z_PTR_P(zv)) & CONST_CS) == 0) {
4438 c = (zend_constant*)Z_PTR_P(zv);
4439 }
4440 }
4441 }
4442 }
4443 }
4444
4445 if (!c) {
4446 if (!check_defined_only) {
4447 if ((opline->op1.num & IS_CONSTANT_UNQUALIFIED) != 0) {
4448 char *actual = (char *)zend_memrchr(Z_STRVAL_P(RT_CONSTANT(opline, opline->op2)), '\\', Z_STRLEN_P(RT_CONSTANT(opline, opline->op2)));
4449 if (!actual) {
4450 ZVAL_STR_COPY(EX_VAR(opline->result.var), Z_STR_P(RT_CONSTANT(opline, opline->op2)));
4451 } else {
4452 actual++;
4453 ZVAL_STRINGL(EX_VAR(opline->result.var),
4454 actual, Z_STRLEN_P(RT_CONSTANT(opline, opline->op2)) - (actual - Z_STRVAL_P(RT_CONSTANT(opline, opline->op2))));
4455 }
4456 /* non-qualified constant - allow text substitution */
4457 zend_error(E_WARNING, "Use of undefined constant %s - assumed '%s' (this will throw an Error in a future version of PHP)",
4458 Z_STRVAL_P(EX_VAR(opline->result.var)), Z_STRVAL_P(EX_VAR(opline->result.var)));
4459 } else {
4460 zend_throw_error(NULL, "Undefined constant '%s'", Z_STRVAL_P(RT_CONSTANT(opline, opline->op2)));
4461 ZVAL_UNDEF(EX_VAR(opline->result.var));
4462 }
4463 }
4464 return FAILURE;
4465 }
4466
4467 if (!check_defined_only) {
4468 ZVAL_COPY_OR_DUP(EX_VAR(opline->result.var), &c->value);
4469 if (!(ZEND_CONSTANT_FLAGS(c) & (CONST_CS|CONST_CT_SUBST))) {
4470 const char *ns_sep;
4471 size_t shortname_offset;
4472 size_t shortname_len;
4473 zend_bool is_deprecated;
4474
4475 if (flags & IS_CONSTANT_UNQUALIFIED) {
4476 const zval *access_key;
4477
4478 if (!(flags & IS_CONSTANT_IN_NAMESPACE)) {
4479 access_key = orig_key - 1;
4480 } else {
4481 if (key < orig_key + 2) {
4482 goto check_short_name;
4483 } else {
4484 access_key = orig_key + 2;
4485 }
4486 }
4487 is_deprecated = !zend_string_equals(c->name, Z_STR_P(access_key));
4488 } else {
4489 check_short_name:
4490 /* Namespaces are always case-insensitive. Only compare shortname. */
4491 ns_sep = zend_memrchr(ZSTR_VAL(c->name), '\\', ZSTR_LEN(c->name));
4492 if (ns_sep) {
4493 shortname_offset = ns_sep - ZSTR_VAL(c->name) + 1;
4494 shortname_len = ZSTR_LEN(c->name) - shortname_offset;
4495 } else {
4496 shortname_offset = 0;
4497 shortname_len = ZSTR_LEN(c->name);
4498 }
4499
4500 is_deprecated = memcmp(ZSTR_VAL(c->name) + shortname_offset, Z_STRVAL_P(orig_key - 1) + shortname_offset, shortname_len) != 0;
4501 }
4502
4503 if (is_deprecated) {
4504 zend_error(E_DEPRECATED,
4505 "Case-insensitive constants are deprecated. "
4506 "The correct casing for this constant is \"%s\"",
4507 ZSTR_VAL(c->name));
4508 return SUCCESS;
4509 }
4510 }
4511 }
4512
4513 CACHE_PTR(opline->extended_value, c);
4514 return SUCCESS;
4515 }
4516 /* }}} */
4517
zend_quick_get_constant(const zval * key,uint32_t flags OPLINE_DC EXECUTE_DATA_DC)4518 static zend_never_inline void ZEND_FASTCALL zend_quick_get_constant(
4519 const zval *key, uint32_t flags OPLINE_DC EXECUTE_DATA_DC) /* {{{ */
4520 {
4521 _zend_quick_get_constant(key, flags, 0 OPLINE_CC EXECUTE_DATA_CC);
4522 } /* }}} */
4523
zend_quick_check_constant(const zval * key OPLINE_DC EXECUTE_DATA_DC)4524 static zend_never_inline int ZEND_FASTCALL zend_quick_check_constant(
4525 const zval *key OPLINE_DC EXECUTE_DATA_DC) /* {{{ */
4526 {
4527 return _zend_quick_get_constant(key, 0, 1 OPLINE_CC EXECUTE_DATA_CC);
4528 } /* }}} */
4529
4530 #if defined(ZEND_VM_IP_GLOBAL_REG) && ((ZEND_VM_KIND == ZEND_VM_KIND_CALL) || (ZEND_VM_KIND == ZEND_VM_KIND_HYBRID))
4531 /* Special versions of functions that sets EX(opline) before calling zend_vm_stack_extend() */
_zend_vm_stack_push_call_frame_ex(uint32_t used_stack,uint32_t call_info,zend_function * func,uint32_t num_args,void * object_or_called_scope)4532 static zend_always_inline zend_execute_data *_zend_vm_stack_push_call_frame_ex(uint32_t used_stack, uint32_t call_info, zend_function *func, uint32_t num_args, void *object_or_called_scope) /* {{{ */
4533 {
4534 zend_execute_data *call = (zend_execute_data*)EG(vm_stack_top);
4535
4536 ZEND_ASSERT_VM_STACK_GLOBAL;
4537
4538 if (UNEXPECTED(used_stack > (size_t)(((char*)EG(vm_stack_end)) - (char*)call))) {
4539 EX(opline) = opline; /* this is the only difference */
4540 call = (zend_execute_data*)zend_vm_stack_extend(used_stack);
4541 ZEND_ASSERT_VM_STACK_GLOBAL;
4542 zend_vm_init_call_frame(call, call_info | ZEND_CALL_ALLOCATED, func, num_args, object_or_called_scope);
4543 return call;
4544 } else {
4545 EG(vm_stack_top) = (zval*)((char*)call + used_stack);
4546 zend_vm_init_call_frame(call, call_info, func, num_args, object_or_called_scope);
4547 return call;
4548 }
4549 } /* }}} */
4550
_zend_vm_stack_push_call_frame(uint32_t call_info,zend_function * func,uint32_t num_args,void * object_or_called_scope)4551 static zend_always_inline zend_execute_data *_zend_vm_stack_push_call_frame(uint32_t call_info, zend_function *func, uint32_t num_args, void *object_or_called_scope) /* {{{ */
4552 {
4553 uint32_t used_stack = zend_vm_calc_used_stack(num_args, func);
4554
4555 return _zend_vm_stack_push_call_frame_ex(used_stack, call_info,
4556 func, num_args, object_or_called_scope);
4557 } /* }}} */
4558 #else
4559 # define _zend_vm_stack_push_call_frame_ex zend_vm_stack_push_call_frame_ex
4560 # define _zend_vm_stack_push_call_frame zend_vm_stack_push_call_frame
4561 #endif
4562
4563 #ifdef ZEND_VM_TRACE_HANDLERS
4564 # include "zend_vm_trace_handlers.h"
4565 #elif defined(ZEND_VM_TRACE_MAP)
4566 # include "zend_vm_trace_map.h"
4567 #endif
4568
4569 #define ZEND_VM_NEXT_OPCODE_EX(check_exception, skip) \
4570 CHECK_SYMBOL_TABLES() \
4571 if (check_exception) { \
4572 OPLINE = EX(opline) + (skip); \
4573 } else { \
4574 ZEND_ASSERT(!EG(exception)); \
4575 OPLINE = opline + (skip); \
4576 } \
4577 ZEND_VM_CONTINUE()
4578
4579 #define ZEND_VM_NEXT_OPCODE_CHECK_EXCEPTION() \
4580 ZEND_VM_NEXT_OPCODE_EX(1, 1)
4581
4582 #define ZEND_VM_NEXT_OPCODE() \
4583 ZEND_VM_NEXT_OPCODE_EX(0, 1)
4584
4585 #define ZEND_VM_SET_NEXT_OPCODE(new_op) \
4586 CHECK_SYMBOL_TABLES() \
4587 OPLINE = new_op
4588
4589 #define ZEND_VM_SET_OPCODE(new_op) \
4590 CHECK_SYMBOL_TABLES() \
4591 OPLINE = new_op; \
4592 ZEND_VM_INTERRUPT_CHECK()
4593
4594 #define ZEND_VM_SET_RELATIVE_OPCODE(opline, offset) \
4595 ZEND_VM_SET_OPCODE(ZEND_OFFSET_TO_OPLINE(opline, offset))
4596
4597 #define ZEND_VM_JMP_EX(new_op, check_exception) do { \
4598 if (check_exception && UNEXPECTED(EG(exception))) { \
4599 HANDLE_EXCEPTION(); \
4600 } \
4601 ZEND_VM_SET_OPCODE(new_op); \
4602 ZEND_VM_CONTINUE(); \
4603 } while (0)
4604
4605 #define ZEND_VM_JMP(new_op) \
4606 ZEND_VM_JMP_EX(new_op, 1)
4607
4608 #define ZEND_VM_INC_OPCODE() \
4609 OPLINE++
4610
4611
4612 #ifndef VM_SMART_OPCODES
4613 # define VM_SMART_OPCODES 1
4614 #endif
4615
4616 #if VM_SMART_OPCODES
4617 # define ZEND_VM_REPEATABLE_OPCODE \
4618 do {
4619 # define ZEND_VM_REPEAT_OPCODE(_opcode) \
4620 } while (UNEXPECTED((++opline)->opcode == _opcode)); \
4621 OPLINE = opline; \
4622 ZEND_VM_CONTINUE()
4623 # define ZEND_VM_SMART_BRANCH(_result, _check) do { \
4624 if ((_check) && UNEXPECTED(EG(exception))) { \
4625 break; \
4626 } \
4627 if (EXPECTED((opline+1)->opcode == ZEND_JMPZ)) { \
4628 if (_result) { \
4629 ZEND_VM_SET_NEXT_OPCODE(opline + 2); \
4630 } else { \
4631 ZEND_VM_SET_OPCODE(OP_JMP_ADDR(opline + 1, (opline+1)->op2)); \
4632 } \
4633 } else if (EXPECTED((opline+1)->opcode == ZEND_JMPNZ)) { \
4634 if (!(_result)) { \
4635 ZEND_VM_SET_NEXT_OPCODE(opline + 2); \
4636 } else { \
4637 ZEND_VM_SET_OPCODE(OP_JMP_ADDR(opline + 1, (opline+1)->op2)); \
4638 } \
4639 } else { \
4640 break; \
4641 } \
4642 ZEND_VM_CONTINUE(); \
4643 } while (0)
4644 # define ZEND_VM_SMART_BRANCH_JMPZ(_result, _check) do { \
4645 if ((_check) && UNEXPECTED(EG(exception))) { \
4646 break; \
4647 } \
4648 if (_result) { \
4649 ZEND_VM_SET_NEXT_OPCODE(opline + 2); \
4650 } else { \
4651 ZEND_VM_SET_OPCODE(OP_JMP_ADDR(opline + 1, (opline+1)->op2)); \
4652 } \
4653 ZEND_VM_CONTINUE(); \
4654 } while (0)
4655 # define ZEND_VM_SMART_BRANCH_JMPNZ(_result, _check) do { \
4656 if ((_check) && UNEXPECTED(EG(exception))) { \
4657 break; \
4658 } \
4659 if (!(_result)) { \
4660 ZEND_VM_SET_NEXT_OPCODE(opline + 2); \
4661 } else { \
4662 ZEND_VM_SET_OPCODE(OP_JMP_ADDR(opline + 1, (opline+1)->op2)); \
4663 } \
4664 ZEND_VM_CONTINUE(); \
4665 } while (0)
4666 #define ZEND_VM_SMART_BRANCH_TRUE() do { \
4667 if (EXPECTED((opline+1)->opcode == ZEND_JMPNZ)) { \
4668 ZEND_VM_SET_OPCODE(OP_JMP_ADDR(opline + 1, (opline+1)->op2)); \
4669 ZEND_VM_CONTINUE(); \
4670 } else if (EXPECTED((opline+1)->opcode == ZEND_JMPZ)) { \
4671 ZEND_VM_SET_NEXT_OPCODE(opline + 2); \
4672 ZEND_VM_CONTINUE(); \
4673 } \
4674 } while (0)
4675 #define ZEND_VM_SMART_BRANCH_TRUE_JMPZ() do { \
4676 ZEND_VM_SET_NEXT_OPCODE(opline + 2); \
4677 ZEND_VM_CONTINUE(); \
4678 } while (0)
4679 #define ZEND_VM_SMART_BRANCH_TRUE_JMPNZ() do { \
4680 ZEND_VM_SET_OPCODE(OP_JMP_ADDR(opline + 1, (opline+1)->op2)); \
4681 ZEND_VM_CONTINUE(); \
4682 } while (0)
4683 #define ZEND_VM_SMART_BRANCH_FALSE() do { \
4684 if (EXPECTED((opline+1)->opcode == ZEND_JMPNZ)) { \
4685 ZEND_VM_SET_NEXT_OPCODE(opline + 2); \
4686 ZEND_VM_CONTINUE(); \
4687 } else if (EXPECTED((opline+1)->opcode == ZEND_JMPZ)) { \
4688 ZEND_VM_SET_OPCODE(OP_JMP_ADDR(opline + 1, (opline+1)->op2)); \
4689 ZEND_VM_CONTINUE(); \
4690 } \
4691 } while (0)
4692 #define ZEND_VM_SMART_BRANCH_FALSE_JMPZ() do { \
4693 ZEND_VM_SET_OPCODE(OP_JMP_ADDR(opline + 1, (opline+1)->op2)); \
4694 ZEND_VM_CONTINUE(); \
4695 } while (0)
4696 #define ZEND_VM_SMART_BRANCH_FALSE_JMPNZ() do { \
4697 ZEND_VM_SET_NEXT_OPCODE(opline + 2); \
4698 ZEND_VM_CONTINUE(); \
4699 } while (0)
4700 #else
4701 # define ZEND_VM_REPEATABLE_OPCODE
4702 # define ZEND_VM_REPEAT_OPCODE(_opcode)
4703 # define ZEND_VM_SMART_BRANCH(_result, _check)
4704 # define ZEND_VM_SMART_BRANCH_JMPZ(_result, _check)
4705 # define ZEND_VM_SMART_BRANCH_JMPNZ(_result, _check)
4706 # define ZEND_VM_SMART_BRANCH_TRUE()
4707 # define ZEND_VM_SMART_BRANCH_FALSE()
4708 #endif
4709
4710 #ifdef __GNUC__
4711 # define ZEND_VM_GUARD(name) __asm__("#" #name)
4712 #else
4713 # define ZEND_VM_GUARD(name)
4714 #endif
4715
4716 #define UNDEF_RESULT() do { \
4717 if (opline->result_type & (IS_VAR | IS_TMP_VAR)) { \
4718 ZVAL_UNDEF(EX_VAR(opline->result.var)); \
4719 } \
4720 } while (0)
4721
4722 #include "zend_vm_execute.h"
4723
zend_set_user_opcode_handler(zend_uchar opcode,user_opcode_handler_t handler)4724 ZEND_API int zend_set_user_opcode_handler(zend_uchar opcode, user_opcode_handler_t handler)
4725 {
4726 if (opcode != ZEND_USER_OPCODE) {
4727 if (handler == NULL) {
4728 /* restore the original handler */
4729 zend_user_opcodes[opcode] = opcode;
4730 } else {
4731 zend_user_opcodes[opcode] = ZEND_USER_OPCODE;
4732 }
4733 zend_user_opcode_handlers[opcode] = handler;
4734 return SUCCESS;
4735 }
4736 return FAILURE;
4737 }
4738
zend_get_user_opcode_handler(zend_uchar opcode)4739 ZEND_API user_opcode_handler_t zend_get_user_opcode_handler(zend_uchar opcode)
4740 {
4741 return zend_user_opcode_handlers[opcode];
4742 }
4743
zend_get_zval_ptr(const zend_op * opline,int op_type,const znode_op * node,const zend_execute_data * execute_data,zend_free_op * should_free,int type)4744 ZEND_API zval *zend_get_zval_ptr(const zend_op *opline, int op_type, const znode_op *node, const zend_execute_data *execute_data, zend_free_op *should_free, int type)
4745 {
4746 zval *ret;
4747
4748 switch (op_type) {
4749 case IS_CONST:
4750 ret = RT_CONSTANT(opline, *node);
4751 *should_free = NULL;
4752 break;
4753 case IS_TMP_VAR:
4754 case IS_VAR:
4755 ret = EX_VAR(node->var);
4756 *should_free = ret;
4757 break;
4758 case IS_CV:
4759 ret = EX_VAR(node->var);
4760 *should_free = NULL;
4761 break;
4762 default:
4763 ret = NULL;
4764 *should_free = ret;
4765 break;
4766 }
4767 return ret;
4768 }
4769