forked from php/php-src
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathzend_optimizer.c
1804 lines (1662 loc) · 57.6 KB
/
zend_optimizer.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
+----------------------------------------------------------------------+
| Zend OPcache |
+----------------------------------------------------------------------+
| Copyright (c) The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| https://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| [email protected] so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Andi Gutmans <[email protected]> |
| Zeev Suraski <[email protected]> |
| Stanislav Malyshev <[email protected]> |
| Dmitry Stogov <[email protected]> |
+----------------------------------------------------------------------+
*/
#include "Optimizer/zend_optimizer.h"
#include "Optimizer/zend_optimizer_internal.h"
#include "zend_API.h"
#include "zend_constants.h"
#include "zend_execute.h"
#include "zend_vm.h"
#include "zend_cfg.h"
#include "zend_func_info.h"
#include "zend_call_graph.h"
#include "zend_inference.h"
#include "zend_dump.h"
#include "php.h"
#ifndef ZEND_OPTIMIZER_MAX_REGISTERED_PASSES
# define ZEND_OPTIMIZER_MAX_REGISTERED_PASSES 32
#endif
struct {
zend_optimizer_pass_t pass[ZEND_OPTIMIZER_MAX_REGISTERED_PASSES];
int last;
} zend_optimizer_registered_passes = {{NULL}, 0};
void zend_optimizer_collect_constant(zend_optimizer_ctx *ctx, zval *name, zval* value)
{
if (!ctx->constants) {
ctx->constants = zend_arena_alloc(&ctx->arena, sizeof(HashTable));
zend_hash_init(ctx->constants, 16, NULL, zval_ptr_dtor_nogc, 0);
}
if (zend_hash_add(ctx->constants, Z_STR_P(name), value)) {
Z_TRY_ADDREF_P(value);
}
}
zend_result zend_optimizer_eval_binary_op(zval *result, uint8_t opcode, zval *op1, zval *op2) /* {{{ */
{
if (zend_binary_op_produces_error(opcode, op1, op2)) {
return FAILURE;
}
binary_op_type binary_op = get_binary_op(opcode);
return binary_op(result, op1, op2);
}
/* }}} */
zend_result zend_optimizer_eval_unary_op(zval *result, uint8_t opcode, zval *op1) /* {{{ */
{
unary_op_type unary_op = get_unary_op(opcode);
if (unary_op) {
if (zend_unary_op_produces_error(opcode, op1)) {
return FAILURE;
}
return unary_op(result, op1);
} else { /* ZEND_BOOL */
ZVAL_BOOL(result, zend_is_true(op1));
return SUCCESS;
}
}
/* }}} */
zend_result zend_optimizer_eval_cast(zval *result, uint32_t type, zval *op1) /* {{{ */
{
switch (type) {
case IS_NULL:
ZVAL_NULL(result);
return SUCCESS;
case _IS_BOOL:
ZVAL_BOOL(result, zval_is_true(op1));
return SUCCESS;
case IS_LONG:
ZVAL_LONG(result, zval_get_long(op1));
return SUCCESS;
case IS_DOUBLE:
ZVAL_DOUBLE(result, zval_get_double(op1));
return SUCCESS;
case IS_STRING:
/* Conversion from double to string takes into account run-time
'precision' setting and cannot be evaluated at compile-time */
if (Z_TYPE_P(op1) != IS_ARRAY && Z_TYPE_P(op1) != IS_DOUBLE) {
ZVAL_STR(result, zval_get_string(op1));
return SUCCESS;
}
break;
case IS_ARRAY:
ZVAL_COPY(result, op1);
convert_to_array(result);
return SUCCESS;
}
return FAILURE;
}
/* }}} */
zend_result zend_optimizer_eval_strlen(zval *result, const zval *op1) /* {{{ */
{
if (Z_TYPE_P(op1) != IS_STRING) {
return FAILURE;
}
ZVAL_LONG(result, Z_STRLEN_P(op1));
return SUCCESS;
}
/* }}} */
zend_result zend_optimizer_eval_special_func_call(
zval *result, zend_string *name, zend_string *arg) {
if (zend_string_equals_literal(name, "function_exists") ||
zend_string_equals_literal(name, "is_callable")) {
zend_string *lc_name = zend_string_tolower(arg);
zend_internal_function *func = zend_hash_find_ptr(EG(function_table), lc_name);
zend_string_release_ex(lc_name, 0);
if (func && func->type == ZEND_INTERNAL_FUNCTION
&& func->module->type == MODULE_PERSISTENT
#ifdef ZEND_WIN32
&& func->module->handle == NULL
#endif
) {
ZVAL_TRUE(result);
return SUCCESS;
}
return FAILURE;
}
if (zend_string_equals_literal(name, "extension_loaded")) {
zend_string *lc_name = zend_string_tolower(arg);
zend_module_entry *m = zend_hash_find_ptr(&module_registry, lc_name);
zend_string_release_ex(lc_name, 0);
if (!m) {
if (PG(enable_dl)) {
return FAILURE;
}
ZVAL_FALSE(result);
return SUCCESS;
}
if (m->type == MODULE_PERSISTENT
#ifdef ZEND_WIN32
&& m->handle == NULL
#endif
) {
ZVAL_TRUE(result);
return SUCCESS;
}
return FAILURE;
}
if (zend_string_equals_literal(name, "constant")) {
return zend_optimizer_get_persistent_constant(arg, result, 1) ? SUCCESS : FAILURE;
}
if (zend_string_equals_literal(name, "dirname")) {
if (!IS_ABSOLUTE_PATH(ZSTR_VAL(arg), ZSTR_LEN(arg))) {
return FAILURE;
}
zend_string *dirname = zend_string_init(ZSTR_VAL(arg), ZSTR_LEN(arg), 0);
ZSTR_LEN(dirname) = zend_dirname(ZSTR_VAL(dirname), ZSTR_LEN(dirname));
if (IS_ABSOLUTE_PATH(ZSTR_VAL(dirname), ZSTR_LEN(dirname))) {
ZVAL_STR(result, dirname);
return SUCCESS;
}
zend_string_release_ex(dirname, 0);
return FAILURE;
}
if (zend_string_equals_literal(name, "ini_get")) {
zend_ini_entry *ini_entry = zend_hash_find_ptr(EG(ini_directives), arg);
if (!ini_entry) {
if (PG(enable_dl)) {
return FAILURE;
}
ZVAL_FALSE(result);
} else if (ini_entry->modifiable != ZEND_INI_SYSTEM) {
return FAILURE;
} else if (ini_entry->value) {
ZVAL_STR_COPY(result, ini_entry->value);
} else {
ZVAL_EMPTY_STRING(result);
}
return SUCCESS;
}
return FAILURE;
}
bool zend_optimizer_get_collected_constant(HashTable *constants, zval *name, zval* value)
{
zval *val;
if ((val = zend_hash_find(constants, Z_STR_P(name))) != NULL) {
ZVAL_COPY(value, val);
return 1;
}
return 0;
}
void zend_optimizer_convert_to_free_op1(zend_op_array *op_array, zend_op *opline)
{
if (opline->op1_type == IS_CV) {
opline->opcode = ZEND_CHECK_VAR;
SET_UNUSED(opline->op2);
SET_UNUSED(opline->result);
opline->extended_value = 0;
} else if (opline->op1_type & (IS_TMP_VAR|IS_VAR)) {
opline->opcode = ZEND_FREE;
SET_UNUSED(opline->op2);
SET_UNUSED(opline->result);
opline->extended_value = 0;
} else {
ZEND_ASSERT(opline->op1_type == IS_CONST);
literal_dtor(&ZEND_OP1_LITERAL(opline));
MAKE_NOP(opline);
}
}
int zend_optimizer_add_literal(zend_op_array *op_array, const zval *zv)
{
int i = op_array->last_literal;
op_array->last_literal++;
op_array->literals = (zval*)erealloc(op_array->literals, op_array->last_literal * sizeof(zval));
ZVAL_COPY_VALUE(&op_array->literals[i], zv);
Z_EXTRA(op_array->literals[i]) = 0;
return i;
}
static inline int zend_optimizer_add_literal_string(zend_op_array *op_array, zend_string *str) {
zval zv;
ZVAL_STR(&zv, str);
zend_string_hash_val(str);
return zend_optimizer_add_literal(op_array, &zv);
}
static inline void drop_leading_backslash(zval *val) {
if (Z_STRVAL_P(val)[0] == '\\') {
zend_string *str = zend_string_init(Z_STRVAL_P(val) + 1, Z_STRLEN_P(val) - 1, 0);
zval_ptr_dtor_nogc(val);
ZVAL_STR(val, str);
}
}
static inline uint32_t alloc_cache_slots(zend_op_array *op_array, uint32_t num) {
uint32_t ret = op_array->cache_size;
op_array->cache_size += num * sizeof(void *);
return ret;
}
#define REQUIRES_STRING(val) do { \
if (Z_TYPE_P(val) != IS_STRING) { \
return 0; \
} \
} while (0)
#define TO_STRING_NOWARN(val) do { \
if (Z_TYPE_P(val) >= IS_ARRAY) { \
return 0; \
} \
convert_to_string(val); \
} while (0)
bool zend_optimizer_update_op1_const(zend_op_array *op_array,
zend_op *opline,
zval *val)
{
switch (opline->opcode) {
case ZEND_OP_DATA:
switch ((opline-1)->opcode) {
case ZEND_ASSIGN_OBJ_REF:
case ZEND_ASSIGN_STATIC_PROP_REF:
return 0;
}
opline->op1.constant = zend_optimizer_add_literal(op_array, val);
break;
case ZEND_FREE:
case ZEND_CHECK_VAR:
MAKE_NOP(opline);
zval_ptr_dtor_nogc(val);
return 1;
case ZEND_SEND_VAR_EX:
case ZEND_SEND_FUNC_ARG:
case ZEND_FETCH_DIM_W:
case ZEND_FETCH_DIM_RW:
case ZEND_FETCH_DIM_FUNC_ARG:
case ZEND_FETCH_DIM_UNSET:
case ZEND_FETCH_LIST_W:
case ZEND_ASSIGN_DIM:
case ZEND_RETURN_BY_REF:
case ZEND_INSTANCEOF:
case ZEND_MAKE_REF:
case ZEND_SEPARATE:
case ZEND_SEND_VAR_NO_REF:
case ZEND_SEND_VAR_NO_REF_EX:
return 0;
case ZEND_CATCH:
REQUIRES_STRING(val);
drop_leading_backslash(val);
opline->op1.constant = zend_optimizer_add_literal(op_array, val);
opline->extended_value = alloc_cache_slots(op_array, 1) | (opline->extended_value & ZEND_LAST_CATCH);
zend_optimizer_add_literal_string(op_array, zend_string_tolower(Z_STR_P(val)));
break;
case ZEND_DEFINED:
REQUIRES_STRING(val);
drop_leading_backslash(val);
opline->op1.constant = zend_optimizer_add_literal(op_array, val);
opline->extended_value = alloc_cache_slots(op_array, 1);
zend_optimizer_add_literal_string(op_array, zend_string_tolower(Z_STR_P(val)));
break;
case ZEND_NEW:
REQUIRES_STRING(val);
drop_leading_backslash(val);
opline->op1.constant = zend_optimizer_add_literal(op_array, val);
opline->op2.num = alloc_cache_slots(op_array, 1);
zend_optimizer_add_literal_string(op_array, zend_string_tolower(Z_STR_P(val)));
break;
case ZEND_INIT_STATIC_METHOD_CALL:
REQUIRES_STRING(val);
drop_leading_backslash(val);
opline->op1.constant = zend_optimizer_add_literal(op_array, val);
if (opline->op2_type != IS_CONST) {
opline->result.num = alloc_cache_slots(op_array, 1);
}
zend_optimizer_add_literal_string(op_array, zend_string_tolower(Z_STR_P(val)));
break;
case ZEND_FETCH_CLASS_CONSTANT:
REQUIRES_STRING(val);
drop_leading_backslash(val);
opline->op1.constant = zend_optimizer_add_literal(op_array, val);
if (opline->op2_type != IS_CONST) {
opline->extended_value = alloc_cache_slots(op_array, 1);
}
zend_optimizer_add_literal_string(op_array, zend_string_tolower(Z_STR_P(val)));
break;
case ZEND_ASSIGN_OP:
case ZEND_ASSIGN_DIM_OP:
case ZEND_ASSIGN_OBJ_OP:
break;
case ZEND_ASSIGN_STATIC_PROP_OP:
case ZEND_ASSIGN_STATIC_PROP:
case ZEND_ASSIGN_STATIC_PROP_REF:
case ZEND_FETCH_STATIC_PROP_R:
case ZEND_FETCH_STATIC_PROP_W:
case ZEND_FETCH_STATIC_PROP_RW:
case ZEND_FETCH_STATIC_PROP_IS:
case ZEND_FETCH_STATIC_PROP_UNSET:
case ZEND_FETCH_STATIC_PROP_FUNC_ARG:
case ZEND_UNSET_STATIC_PROP:
case ZEND_ISSET_ISEMPTY_STATIC_PROP:
case ZEND_PRE_INC_STATIC_PROP:
case ZEND_PRE_DEC_STATIC_PROP:
case ZEND_POST_INC_STATIC_PROP:
case ZEND_POST_DEC_STATIC_PROP:
TO_STRING_NOWARN(val);
opline->op1.constant = zend_optimizer_add_literal(op_array, val);
if (opline->op2_type == IS_CONST && (opline->extended_value & ~ZEND_FETCH_OBJ_FLAGS) + sizeof(void*) == op_array->cache_size) {
op_array->cache_size += sizeof(void *);
} else {
opline->extended_value = alloc_cache_slots(op_array, 3) | (opline->extended_value & ZEND_FETCH_OBJ_FLAGS);
}
break;
case ZEND_SEND_VAR:
opline->opcode = ZEND_SEND_VAL;
opline->op1.constant = zend_optimizer_add_literal(op_array, val);
break;
case ZEND_CASE:
opline->opcode = ZEND_IS_EQUAL;
opline->op1.constant = zend_optimizer_add_literal(op_array, val);
break;
case ZEND_CASE_STRICT:
opline->opcode = ZEND_IS_IDENTICAL;
opline->op1.constant = zend_optimizer_add_literal(op_array, val);
break;
case ZEND_VERIFY_RETURN_TYPE:
/* This would require a non-local change.
* zend_optimizer_replace_by_const() supports this. */
return 0;
case ZEND_COPY_TMP:
case ZEND_FETCH_CLASS_NAME:
return 0;
case ZEND_ECHO:
{
zval zv;
if (Z_TYPE_P(val) != IS_STRING && zend_optimizer_eval_cast(&zv, IS_STRING, val) == SUCCESS) {
zval_ptr_dtor_nogc(val);
val = &zv;
}
opline->op1.constant = zend_optimizer_add_literal(op_array, val);
if (Z_TYPE_P(val) == IS_STRING && Z_STRLEN_P(val) == 0) {
MAKE_NOP(opline);
return 1;
}
/* TODO: In a subsequent pass, *after* this step and compacting nops, combine consecutive ZEND_ECHOs using the block information from ssa->cfg */
/* (e.g. for ext/opcache/tests/opt/sccp_010.phpt) */
break;
}
case ZEND_CONCAT:
case ZEND_FAST_CONCAT:
case ZEND_FETCH_R:
case ZEND_FETCH_W:
case ZEND_FETCH_RW:
case ZEND_FETCH_IS:
case ZEND_FETCH_UNSET:
case ZEND_FETCH_FUNC_ARG:
case ZEND_ISSET_ISEMPTY_VAR:
case ZEND_UNSET_VAR:
TO_STRING_NOWARN(val);
if (opline->opcode == ZEND_CONCAT && opline->op2_type == IS_CONST) {
opline->opcode = ZEND_FAST_CONCAT;
}
ZEND_FALLTHROUGH;
default:
opline->op1.constant = zend_optimizer_add_literal(op_array, val);
break;
}
opline->op1_type = IS_CONST;
if (Z_TYPE(ZEND_OP1_LITERAL(opline)) == IS_STRING) {
zend_string_hash_val(Z_STR(ZEND_OP1_LITERAL(opline)));
}
return 1;
}
bool zend_optimizer_update_op2_const(zend_op_array *op_array,
zend_op *opline,
zval *val)
{
zval tmp;
switch (opline->opcode) {
case ZEND_ASSIGN_REF:
case ZEND_FAST_CALL:
return 0;
case ZEND_FETCH_CLASS:
case ZEND_INSTANCEOF:
REQUIRES_STRING(val);
drop_leading_backslash(val);
opline->op2.constant = zend_optimizer_add_literal(op_array, val);
zend_optimizer_add_literal_string(op_array, zend_string_tolower(Z_STR_P(val)));
opline->extended_value = alloc_cache_slots(op_array, 1);
break;
case ZEND_INIT_FCALL_BY_NAME:
REQUIRES_STRING(val);
drop_leading_backslash(val);
opline->op2.constant = zend_optimizer_add_literal(op_array, val);
zend_optimizer_add_literal_string(op_array, zend_string_tolower(Z_STR_P(val)));
opline->result.num = alloc_cache_slots(op_array, 1);
break;
case ZEND_ASSIGN_STATIC_PROP:
case ZEND_ASSIGN_STATIC_PROP_REF:
case ZEND_FETCH_STATIC_PROP_R:
case ZEND_FETCH_STATIC_PROP_W:
case ZEND_FETCH_STATIC_PROP_RW:
case ZEND_FETCH_STATIC_PROP_IS:
case ZEND_FETCH_STATIC_PROP_UNSET:
case ZEND_FETCH_STATIC_PROP_FUNC_ARG:
case ZEND_UNSET_STATIC_PROP:
case ZEND_ISSET_ISEMPTY_STATIC_PROP:
case ZEND_PRE_INC_STATIC_PROP:
case ZEND_PRE_DEC_STATIC_PROP:
case ZEND_POST_INC_STATIC_PROP:
case ZEND_POST_DEC_STATIC_PROP:
case ZEND_ASSIGN_STATIC_PROP_OP:
REQUIRES_STRING(val);
drop_leading_backslash(val);
opline->op2.constant = zend_optimizer_add_literal(op_array, val);
zend_optimizer_add_literal_string(op_array, zend_string_tolower(Z_STR_P(val)));
if (opline->op1_type != IS_CONST) {
opline->extended_value = alloc_cache_slots(op_array, 1) | (opline->extended_value & (ZEND_RETURNS_FUNCTION|ZEND_ISEMPTY|ZEND_FETCH_OBJ_FLAGS));
}
break;
case ZEND_INIT_FCALL:
REQUIRES_STRING(val);
if (Z_REFCOUNT_P(val) == 1) {
zend_str_tolower(Z_STRVAL_P(val), Z_STRLEN_P(val));
} else {
ZVAL_STR(&tmp, zend_string_tolower(Z_STR_P(val)));
zval_ptr_dtor_nogc(val);
val = &tmp;
}
opline->op2.constant = zend_optimizer_add_literal(op_array, val);
opline->result.num = alloc_cache_slots(op_array, 1);
break;
case ZEND_INIT_DYNAMIC_CALL:
if (Z_TYPE_P(val) == IS_STRING) {
if (zend_memrchr(Z_STRVAL_P(val), ':', Z_STRLEN_P(val))) {
return 0;
}
if (zend_optimizer_classify_function(Z_STR_P(val), opline->extended_value)) {
/* Dynamic call to various special functions must stay dynamic,
* otherwise would drop a warning */
return 0;
}
opline->opcode = ZEND_INIT_FCALL_BY_NAME;
drop_leading_backslash(val);
opline->op2.constant = zend_optimizer_add_literal(op_array, val);
zend_optimizer_add_literal_string(op_array, zend_string_tolower(Z_STR_P(val)));
opline->result.num = alloc_cache_slots(op_array, 1);
} else {
opline->op2.constant = zend_optimizer_add_literal(op_array, val);
}
break;
case ZEND_INIT_METHOD_CALL:
REQUIRES_STRING(val);
opline->op2.constant = zend_optimizer_add_literal(op_array, val);
zend_optimizer_add_literal_string(op_array, zend_string_tolower(Z_STR_P(val)));
opline->result.num = alloc_cache_slots(op_array, 2);
break;
case ZEND_INIT_STATIC_METHOD_CALL:
REQUIRES_STRING(val);
opline->op2.constant = zend_optimizer_add_literal(op_array, val);
zend_optimizer_add_literal_string(op_array, zend_string_tolower(Z_STR_P(val)));
if (opline->op1_type != IS_CONST) {
opline->result.num = alloc_cache_slots(op_array, 2);
}
break;
case ZEND_ASSIGN_OBJ:
case ZEND_ASSIGN_OBJ_REF:
case ZEND_FETCH_OBJ_R:
case ZEND_FETCH_OBJ_W:
case ZEND_FETCH_OBJ_RW:
case ZEND_FETCH_OBJ_IS:
case ZEND_FETCH_OBJ_UNSET:
case ZEND_FETCH_OBJ_FUNC_ARG:
case ZEND_UNSET_OBJ:
case ZEND_PRE_INC_OBJ:
case ZEND_PRE_DEC_OBJ:
case ZEND_POST_INC_OBJ:
case ZEND_POST_DEC_OBJ:
TO_STRING_NOWARN(val);
opline->op2.constant = zend_optimizer_add_literal(op_array, val);
opline->extended_value = alloc_cache_slots(op_array, 3);
break;
case ZEND_ASSIGN_OBJ_OP:
TO_STRING_NOWARN(val);
opline->op2.constant = zend_optimizer_add_literal(op_array, val);
ZEND_ASSERT((opline + 1)->opcode == ZEND_OP_DATA);
(opline + 1)->extended_value = alloc_cache_slots(op_array, 3);
break;
case ZEND_ISSET_ISEMPTY_PROP_OBJ:
TO_STRING_NOWARN(val);
opline->op2.constant = zend_optimizer_add_literal(op_array, val);
opline->extended_value = alloc_cache_slots(op_array, 3) | (opline->extended_value & ZEND_ISEMPTY);
break;
case ZEND_ASSIGN_DIM_OP:
case ZEND_ISSET_ISEMPTY_DIM_OBJ:
case ZEND_ASSIGN_DIM:
case ZEND_UNSET_DIM:
case ZEND_FETCH_DIM_R:
case ZEND_FETCH_DIM_W:
case ZEND_FETCH_DIM_RW:
case ZEND_FETCH_DIM_IS:
case ZEND_FETCH_DIM_FUNC_ARG:
case ZEND_FETCH_DIM_UNSET:
case ZEND_FETCH_LIST_R:
case ZEND_FETCH_LIST_W:
if (Z_TYPE_P(val) == IS_STRING) {
zend_ulong index;
if (ZEND_HANDLE_NUMERIC(Z_STR_P(val), index)) {
ZVAL_LONG(&tmp, index);
opline->op2.constant = zend_optimizer_add_literal(op_array, &tmp);
zend_string_hash_val(Z_STR_P(val));
zend_optimizer_add_literal(op_array, val);
Z_EXTRA(op_array->literals[opline->op2.constant]) = ZEND_EXTRA_VALUE;
break;
}
}
opline->op2.constant = zend_optimizer_add_literal(op_array, val);
break;
case ZEND_ADD_ARRAY_ELEMENT:
case ZEND_INIT_ARRAY:
if (Z_TYPE_P(val) == IS_STRING) {
zend_ulong index;
if (ZEND_HANDLE_NUMERIC(Z_STR_P(val), index)) {
zval_ptr_dtor_nogc(val);
ZVAL_LONG(val, index);
}
}
opline->op2.constant = zend_optimizer_add_literal(op_array, val);
break;
case ZEND_ROPE_INIT:
case ZEND_ROPE_ADD:
case ZEND_ROPE_END:
case ZEND_CONCAT:
case ZEND_FAST_CONCAT:
TO_STRING_NOWARN(val);
if (opline->opcode == ZEND_CONCAT && opline->op1_type == IS_CONST) {
opline->opcode = ZEND_FAST_CONCAT;
}
ZEND_FALLTHROUGH;
default:
opline->op2.constant = zend_optimizer_add_literal(op_array, val);
break;
}
opline->op2_type = IS_CONST;
if (Z_TYPE(ZEND_OP2_LITERAL(opline)) == IS_STRING) {
zend_string_hash_val(Z_STR(ZEND_OP2_LITERAL(opline)));
}
return 1;
}
bool zend_optimizer_replace_by_const(zend_op_array *op_array,
zend_op *opline,
uint8_t type,
uint32_t var,
zval *val)
{
zend_op *end = op_array->opcodes + op_array->last;
while (opline < end) {
if (opline->op1_type == type &&
opline->op1.var == var) {
switch (opline->opcode) {
/* In most cases IS_TMP_VAR operand may be used only once.
* The operands are usually destroyed by the opcode handler.
* However, there are some exception which keep the operand alive. In that case
* we want to try to replace all uses of the temporary.
*/
case ZEND_FETCH_LIST_R:
case ZEND_CASE:
case ZEND_CASE_STRICT:
case ZEND_SWITCH_LONG:
case ZEND_SWITCH_STRING:
case ZEND_MATCH:
case ZEND_MATCH_ERROR:
case ZEND_JMP_NULL: {
zend_op *end = op_array->opcodes + op_array->last;
while (opline < end) {
if (opline->op1_type == type && opline->op1.var == var) {
/* If this opcode doesn't keep the operand alive, we're done. Check
* this early, because op replacement may modify the opline. */
bool is_last = opline->opcode != ZEND_FETCH_LIST_R
&& opline->opcode != ZEND_CASE
&& opline->opcode != ZEND_CASE_STRICT
&& opline->opcode != ZEND_SWITCH_LONG
&& opline->opcode != ZEND_SWITCH_STRING
&& opline->opcode != ZEND_MATCH
&& opline->opcode != ZEND_MATCH_ERROR
&& opline->opcode != ZEND_JMP_NULL
&& (opline->opcode != ZEND_FREE
|| opline->extended_value != ZEND_FREE_ON_RETURN);
Z_TRY_ADDREF_P(val);
if (!zend_optimizer_update_op1_const(op_array, opline, val)) {
zval_ptr_dtor(val);
return 0;
}
if (is_last) {
break;
}
}
opline++;
}
zval_ptr_dtor_nogc(val);
return 1;
}
case ZEND_VERIFY_RETURN_TYPE: {
zend_arg_info *ret_info = op_array->arg_info - 1;
if (!ZEND_TYPE_CONTAINS_CODE(ret_info->type, Z_TYPE_P(val))
|| (op_array->fn_flags & ZEND_ACC_RETURN_REFERENCE)) {
return 0;
}
MAKE_NOP(opline);
/* zend_handle_loops_and_finally may inserts other oplines */
do {
++opline;
} while (opline->opcode != ZEND_RETURN && opline->opcode != ZEND_RETURN_BY_REF);
ZEND_ASSERT(opline->op1.var == var);
break;
}
default:
break;
}
return zend_optimizer_update_op1_const(op_array, opline, val);
}
if (opline->op2_type == type &&
opline->op2.var == var) {
return zend_optimizer_update_op2_const(op_array, opline, val);
}
opline++;
}
return 1;
}
/* Update jump offsets after a jump was migrated to another opline */
void zend_optimizer_migrate_jump(zend_op_array *op_array, zend_op *new_opline, zend_op *opline) {
switch (new_opline->opcode) {
case ZEND_JMP:
case ZEND_FAST_CALL:
ZEND_SET_OP_JMP_ADDR(new_opline, new_opline->op1, ZEND_OP1_JMP_ADDR(opline));
break;
case ZEND_JMPZ:
case ZEND_JMPNZ:
case ZEND_JMPZ_EX:
case ZEND_JMPNZ_EX:
case ZEND_FE_RESET_R:
case ZEND_FE_RESET_RW:
case ZEND_JMP_SET:
case ZEND_COALESCE:
case ZEND_ASSERT_CHECK:
case ZEND_JMP_NULL:
case ZEND_BIND_INIT_STATIC_OR_JMP:
case ZEND_JMP_FRAMELESS:
ZEND_SET_OP_JMP_ADDR(new_opline, new_opline->op2, ZEND_OP2_JMP_ADDR(opline));
break;
case ZEND_FE_FETCH_R:
case ZEND_FE_FETCH_RW:
new_opline->extended_value = ZEND_OPLINE_NUM_TO_OFFSET(op_array, new_opline, ZEND_OFFSET_TO_OPLINE_NUM(op_array, opline, opline->extended_value));
break;
case ZEND_CATCH:
if (!(opline->extended_value & ZEND_LAST_CATCH)) {
ZEND_SET_OP_JMP_ADDR(new_opline, new_opline->op2, ZEND_OP2_JMP_ADDR(opline));
}
break;
case ZEND_SWITCH_LONG:
case ZEND_SWITCH_STRING:
case ZEND_MATCH:
{
HashTable *jumptable = Z_ARRVAL(ZEND_OP2_LITERAL(opline));
zval *zv;
ZEND_HASH_FOREACH_VAL(jumptable, zv) {
Z_LVAL_P(zv) = ZEND_OPLINE_NUM_TO_OFFSET(op_array, new_opline, ZEND_OFFSET_TO_OPLINE_NUM(op_array, opline, Z_LVAL_P(zv)));
} ZEND_HASH_FOREACH_END();
new_opline->extended_value = ZEND_OPLINE_NUM_TO_OFFSET(op_array, new_opline, ZEND_OFFSET_TO_OPLINE_NUM(op_array, opline, opline->extended_value));
break;
}
}
}
/* Shift jump offsets based on shiftlist */
void zend_optimizer_shift_jump(zend_op_array *op_array, zend_op *opline, uint32_t *shiftlist) {
switch (opline->opcode) {
case ZEND_JMP:
case ZEND_FAST_CALL:
ZEND_SET_OP_JMP_ADDR(opline, opline->op1, ZEND_OP1_JMP_ADDR(opline) - shiftlist[ZEND_OP1_JMP_ADDR(opline) - op_array->opcodes]);
break;
case ZEND_JMPZ:
case ZEND_JMPNZ:
case ZEND_JMPZ_EX:
case ZEND_JMPNZ_EX:
case ZEND_FE_RESET_R:
case ZEND_FE_RESET_RW:
case ZEND_JMP_SET:
case ZEND_COALESCE:
case ZEND_ASSERT_CHECK:
case ZEND_JMP_NULL:
case ZEND_BIND_INIT_STATIC_OR_JMP:
case ZEND_JMP_FRAMELESS:
ZEND_SET_OP_JMP_ADDR(opline, opline->op2, ZEND_OP2_JMP_ADDR(opline) - shiftlist[ZEND_OP2_JMP_ADDR(opline) - op_array->opcodes]);
break;
case ZEND_CATCH:
if (!(opline->extended_value & ZEND_LAST_CATCH)) {
ZEND_SET_OP_JMP_ADDR(opline, opline->op2, ZEND_OP2_JMP_ADDR(opline) - shiftlist[ZEND_OP2_JMP_ADDR(opline) - op_array->opcodes]);
}
break;
case ZEND_FE_FETCH_R:
case ZEND_FE_FETCH_RW:
opline->extended_value = ZEND_OPLINE_NUM_TO_OFFSET(op_array, opline, ZEND_OFFSET_TO_OPLINE_NUM(op_array, opline, opline->extended_value) - shiftlist[ZEND_OFFSET_TO_OPLINE_NUM(op_array, opline, opline->extended_value)]);
break;
case ZEND_SWITCH_LONG:
case ZEND_SWITCH_STRING:
case ZEND_MATCH:
{
HashTable *jumptable = Z_ARRVAL(ZEND_OP2_LITERAL(opline));
zval *zv;
ZEND_HASH_FOREACH_VAL(jumptable, zv) {
Z_LVAL_P(zv) = ZEND_OPLINE_NUM_TO_OFFSET(op_array, opline, ZEND_OFFSET_TO_OPLINE_NUM(op_array, opline, Z_LVAL_P(zv)) - shiftlist[ZEND_OFFSET_TO_OPLINE_NUM(op_array, opline, Z_LVAL_P(zv))]);
} ZEND_HASH_FOREACH_END();
opline->extended_value = ZEND_OPLINE_NUM_TO_OFFSET(op_array, opline, ZEND_OFFSET_TO_OPLINE_NUM(op_array, opline, opline->extended_value) - shiftlist[ZEND_OFFSET_TO_OPLINE_NUM(op_array, opline, opline->extended_value)]);
break;
}
}
}
static bool zend_optimizer_ignore_class(zval *ce_zv, zend_string *filename)
{
zend_class_entry *ce = Z_PTR_P(ce_zv);
if (ce->ce_flags & ZEND_ACC_PRELOADED) {
Bucket *ce_bucket = (Bucket*)((uintptr_t)ce_zv - XtOffsetOf(Bucket, val));
size_t offset = ce_bucket - EG(class_table)->arData;
if (offset < EG(persistent_classes_count)) {
return false;
}
}
return ce->type == ZEND_USER_CLASS
&& (!ce->info.user.filename || ce->info.user.filename != filename);
}
static bool zend_optimizer_ignore_function(zval *fbc_zv, zend_string *filename)
{
zend_function *fbc = Z_PTR_P(fbc_zv);
if (fbc->type == ZEND_INTERNAL_FUNCTION) {
return false;
} else if (fbc->type == ZEND_USER_FUNCTION) {
if (fbc->op_array.fn_flags & ZEND_ACC_PRELOADED) {
Bucket *fbc_bucket = (Bucket*)((uintptr_t)fbc_zv - XtOffsetOf(Bucket, val));
size_t offset = fbc_bucket - EG(function_table)->arData;
if (offset < EG(persistent_functions_count)) {
return false;
}
}
return !fbc->op_array.filename || fbc->op_array.filename != filename;
} else {
ZEND_ASSERT(fbc->type == ZEND_EVAL_CODE);
return true;
}
}
zend_class_entry *zend_optimizer_get_class_entry(
const zend_script *script, const zend_op_array *op_array, zend_string *lcname) {
zend_class_entry *ce = script ? zend_hash_find_ptr(&script->class_table, lcname) : NULL;
if (ce) {
return ce;
}
zval *ce_zv = zend_hash_find(CG(class_table), lcname);
if (ce_zv && !zend_optimizer_ignore_class(ce_zv, op_array ? op_array->filename : NULL)) {
return Z_PTR_P(ce_zv);
}
if (op_array && op_array->scope && zend_string_equals_ci(op_array->scope->namespaced_name.name, lcname)) {
return op_array->scope;
}
return NULL;
}
zend_class_entry *zend_optimizer_get_class_entry_from_op1(
const zend_script *script, const zend_op_array *op_array, const zend_op *opline) {
if (opline->op1_type == IS_CONST) {
zval *op1 = CRT_CONSTANT(opline->op1);
if (Z_TYPE_P(op1) == IS_STRING) {
return zend_optimizer_get_class_entry(script, op_array, Z_STR_P(op1 + 1));
}
} else if (opline->op1_type == IS_UNUSED && op_array->scope
&& !(op_array->scope->ce_flags & ZEND_ACC_TRAIT)
&& ((opline->op1.num & ZEND_FETCH_CLASS_MASK) == ZEND_FETCH_CLASS_SELF
|| ((opline->op1.num & ZEND_FETCH_CLASS_MASK) == ZEND_FETCH_CLASS_STATIC
&& (op_array->scope->ce_flags & ZEND_ACC_FINAL)))) {
return op_array->scope;
}
return NULL;
}
const zend_class_constant *zend_fetch_class_const_info(
const zend_script *script, const zend_op_array *op_array, const zend_op *opline, bool *is_prototype) {
const zend_class_entry *ce = NULL;
bool is_static_reference = false;
if (!opline || !op_array || opline->op2_type != IS_CONST || Z_TYPE_P(CRT_CONSTANT(opline->op2)) != IS_STRING) {
return NULL;
}
if (opline->op1_type == IS_CONST) {
zval *op1 = CRT_CONSTANT(opline->op1);
if (Z_TYPE_P(op1) == IS_STRING) {
if (script) {
ce = zend_optimizer_get_class_entry(script, op_array, Z_STR_P(op1 + 1));
} else {
zval *ce_zv = zend_hash_find(EG(class_table), Z_STR_P(op1 + 1));
if (ce_zv && !zend_optimizer_ignore_class(ce_zv, op_array->filename)) {
ce = Z_PTR_P(ce_zv);
}
}
}
} else if (opline->op1_type == IS_UNUSED
&& op_array->scope && !(op_array->scope->ce_flags & ZEND_ACC_TRAIT)
&& !(op_array->fn_flags & ZEND_ACC_TRAIT_CLONE)) {
int fetch_type = opline->op1.num & ZEND_FETCH_CLASS_MASK;
if (fetch_type == ZEND_FETCH_CLASS_SELF) {
ce = op_array->scope;
} else if (fetch_type == ZEND_FETCH_CLASS_STATIC) {
ce = op_array->scope;
is_static_reference = true;
} else if (fetch_type == ZEND_FETCH_CLASS_PARENT) {
if (op_array->scope->ce_flags & ZEND_ACC_LINKED) {
ce = op_array->scope->parent;
}
}
}
if (!ce || (ce->ce_flags & ZEND_ACC_TRAIT)) {
return NULL;
}
zend_class_constant *const_info = zend_hash_find_ptr(&ce->constants_table, Z_STR_P(CRT_CONSTANT(opline->op2)));
if (!const_info) {
return NULL;
}
if ((ZEND_CLASS_CONST_FLAGS(const_info) & ZEND_ACC_DEPRECATED)
|| ((ZEND_CLASS_CONST_FLAGS(const_info) & ZEND_ACC_PPP_MASK) != ZEND_ACC_PUBLIC && const_info->ce != op_array->scope)) {
return NULL;
}
*is_prototype = is_static_reference
&& !(const_info->ce->ce_flags & ZEND_ACC_FINAL) && !(ZEND_CLASS_CONST_FLAGS(const_info) & ZEND_ACC_FINAL);
return const_info;
}
zend_function *zend_optimizer_get_called_func(
zend_script *script, zend_op_array *op_array, zend_op *opline, bool *is_prototype)
{
*is_prototype = 0;
switch (opline->opcode) {
case ZEND_INIT_FCALL:
{
zend_string *function_name = Z_STR_P(CRT_CONSTANT(opline->op2));
zend_function *func;
zval *func_zv;
if (script && (func = zend_hash_find_ptr(&script->function_table, function_name)) != NULL) {
return func;
} else if ((func_zv = zend_hash_find(EG(function_table), function_name)) != NULL) {
if (!zend_optimizer_ignore_function(func_zv, op_array->filename)) {
return Z_PTR_P(func_zv);
}
}
break;
}
case ZEND_INIT_FCALL_BY_NAME:
case ZEND_INIT_NS_FCALL_BY_NAME:
if (opline->op2_type == IS_CONST && Z_TYPE_P(CRT_CONSTANT(opline->op2)) == IS_STRING) {
zval *function_name = CRT_CONSTANT(opline->op2) + 1;
zend_function *func;
zval *func_zv;
if (script && (func = zend_hash_find_ptr(&script->function_table, Z_STR_P(function_name)))) {
return func;
} else if ((func_zv = zend_hash_find(EG(function_table), Z_STR_P(function_name))) != NULL) {
if (!zend_optimizer_ignore_function(func_zv, op_array->filename)) {
return Z_PTR_P(func_zv);
}
}
}
break;
case ZEND_INIT_STATIC_METHOD_CALL:
if (opline->op2_type == IS_CONST && Z_TYPE_P(CRT_CONSTANT(opline->op2)) == IS_STRING) {
zend_class_entry *ce = zend_optimizer_get_class_entry_from_op1(
script, op_array, opline);
if (ce) {
zend_string *func_name = Z_STR_P(CRT_CONSTANT(opline->op2) + 1);
zend_function *fbc = zend_hash_find_ptr(&ce->function_table, func_name);
if (fbc) {
bool is_public = (fbc->common.fn_flags & ZEND_ACC_PUBLIC) != 0;
bool same_scope = fbc->common.scope == op_array->scope;
if (is_public || same_scope) {
return fbc;
}
}
}
}
break;
case ZEND_INIT_METHOD_CALL:
if (opline->op1_type == IS_UNUSED
&& opline->op2_type == IS_CONST && Z_TYPE_P(CRT_CONSTANT(opline->op2)) == IS_STRING
&& op_array->scope
&& !(op_array->fn_flags & ZEND_ACC_TRAIT_CLONE)
&& !(op_array->scope->ce_flags & ZEND_ACC_TRAIT)) {
zend_string *method_name = Z_STR_P(CRT_CONSTANT(opline->op2) + 1);
zend_function *fbc = zend_hash_find_ptr(
&op_array->scope->function_table, method_name);
if (fbc) {
bool is_private = (fbc->common.fn_flags & ZEND_ACC_PRIVATE) != 0;
if (is_private) {
/* Only use private method if in the same scope. We can't even use it
* as a prototype, as it may be overridden with changed signature. */
bool same_scope = fbc->common.scope == op_array->scope;
return same_scope ? fbc : NULL;
}
/* Prototype methods are potentially overridden. fbc still contains useful type information.
* Some optimizations may not be applied, like inlining or inferring the send-mode of superfluous args.
* A method cannot be overridden if the class or method is final. */
if ((fbc->common.fn_flags & ZEND_ACC_FINAL) == 0 &&
(fbc->common.scope->ce_flags & ZEND_ACC_FINAL) == 0) {
*is_prototype = true;
}
return fbc;
}
}
break;
case ZEND_INIT_PARENT_PROPERTY_HOOK_CALL: {