forked from ruby/ruby
-
Notifications
You must be signed in to change notification settings - Fork 0
/
vm.c
2276 lines (1951 loc) · 50.9 KB
/
vm.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
/**********************************************************************
vm.c -
$Author$
Copyright (C) 2004-2007 Koichi Sasada
**********************************************************************/
#include "ruby/ruby.h"
#include "ruby/vm.h"
#include "ruby/st.h"
#include "ruby/encoding.h"
#include "internal.h"
#include "gc.h"
#include "vm_core.h"
#include "iseq.h"
#include "eval_intern.h"
#include "vm_insnhelper.h"
#include "vm_insnhelper.c"
#include "vm_exec.h"
#include "vm_exec.c"
#include "vm_method.c"
#include "vm_eval.c"
#include <assert.h>
#define BUFSIZE 0x100
#define PROCDEBUG 0
VALUE rb_cRubyVM;
VALUE rb_cThread;
VALUE rb_cEnv;
VALUE rb_mRubyVMFrozenCore;
VALUE ruby_vm_const_missing_count = 0;
char ruby_vm_redefined_flag[BOP_LAST_];
rb_thread_t *ruby_current_thread = 0;
rb_vm_t *ruby_current_vm = 0;
static void thread_free(void *ptr);
void vm_analysis_operand(int insn, int n, VALUE op);
void vm_analysis_register(int reg, int isset);
void vm_analysis_insn(int insn);
void
rb_vm_change_state(void)
{
INC_VM_STATE_VERSION();
}
static void vm_clear_global_method_cache(void);
static void
vm_clear_all_inline_method_cache(void)
{
/* TODO: Clear all inline cache entries in all iseqs.
How to iterate all iseqs in sweep phase?
rb_objspace_each_objects() doesn't work at sweep phase.
*/
}
static void
vm_clear_all_cache()
{
vm_clear_global_method_cache();
vm_clear_all_inline_method_cache();
ruby_vm_global_state_version = 1;
}
void
rb_vm_inc_const_missing_count(void)
{
ruby_vm_const_missing_count +=1;
}
/* control stack frame */
static inline VALUE
rb_vm_set_finish_env(rb_thread_t * th)
{
vm_push_frame(th, 0, VM_FRAME_MAGIC_FINISH,
Qnil, th->cfp->lfp[0], 0,
th->cfp->sp, 0, 1);
th->cfp->pc = (VALUE *)&finish_insn_seq[0];
return Qtrue;
}
static void
vm_set_top_stack(rb_thread_t * th, VALUE iseqval)
{
rb_iseq_t *iseq;
GetISeqPtr(iseqval, iseq);
if (iseq->type != ISEQ_TYPE_TOP) {
rb_raise(rb_eTypeError, "Not a toplevel InstructionSequence");
}
/* for return */
rb_vm_set_finish_env(th);
CHECK_STACK_OVERFLOW(th->cfp, iseq->local_size + iseq->stack_max);
vm_push_frame(th, iseq, VM_FRAME_MAGIC_TOP,
th->top_self, 0, iseq->iseq_encoded,
th->cfp->sp, 0, iseq->local_size);
}
static void
vm_set_eval_stack(rb_thread_t * th, VALUE iseqval, const NODE *cref)
{
rb_iseq_t *iseq;
rb_block_t * const block = th->base_block;
GetISeqPtr(iseqval, iseq);
/* for return */
rb_vm_set_finish_env(th);
CHECK_STACK_OVERFLOW(th->cfp, iseq->local_size + iseq->stack_max);
vm_push_frame(th, iseq, VM_FRAME_MAGIC_EVAL, block->self,
GC_GUARDED_PTR(block->dfp), iseq->iseq_encoded,
th->cfp->sp, block->lfp, iseq->local_size);
if (cref) {
th->cfp->dfp[-1] = (VALUE)cref;
}
}
static void
vm_set_main_stack(rb_thread_t *th, VALUE iseqval)
{
VALUE toplevel_binding = rb_const_get(rb_cObject, rb_intern("TOPLEVEL_BINDING"));
rb_binding_t *bind;
rb_iseq_t *iseq;
rb_env_t *env;
GetBindingPtr(toplevel_binding, bind);
GetEnvPtr(bind->env, env);
th->base_block = &env->block;
vm_set_eval_stack(th, iseqval, 0);
th->base_block = 0;
/* save binding */
GetISeqPtr(iseqval, iseq);
if (bind && iseq->local_size > 0) {
bind->env = rb_vm_make_env_object(th, th->cfp);
}
}
rb_control_frame_t *
rb_vm_get_ruby_level_next_cfp(rb_thread_t *th, rb_control_frame_t *cfp)
{
while (!RUBY_VM_CONTROL_FRAME_STACK_OVERFLOW_P(th, cfp)) {
if (RUBY_VM_NORMAL_ISEQ_P(cfp->iseq)) {
return cfp;
}
cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
}
return 0;
}
static rb_control_frame_t *
vm_get_ruby_level_caller_cfp(rb_thread_t *th, rb_control_frame_t *cfp)
{
if (RUBY_VM_NORMAL_ISEQ_P(cfp->iseq)) {
return cfp;
}
cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
while (!RUBY_VM_CONTROL_FRAME_STACK_OVERFLOW_P(th, cfp)) {
if (RUBY_VM_NORMAL_ISEQ_P(cfp->iseq)) {
return cfp;
}
if ((cfp->flag & VM_FRAME_FLAG_PASSED) == 0) {
break;
}
cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
}
return 0;
}
/* at exit */
void
ruby_vm_at_exit(void (*func)(rb_vm_t *))
{
rb_ary_push((VALUE)&GET_VM()->at_exit, (VALUE)func);
}
static void
ruby_vm_run_at_exit_hooks(rb_vm_t *vm)
{
VALUE hook = (VALUE)&vm->at_exit;
while (RARRAY_LEN(hook) > 0) {
typedef void rb_vm_at_exit_func(rb_vm_t*);
rb_vm_at_exit_func *func = (rb_vm_at_exit_func*)rb_ary_pop(hook);
(*func)(vm);
}
rb_ary_free(hook);
}
/* Env */
/*
env{
env[0] // special (block or prev env)
env[1] // env object
};
*/
#define ENV_IN_HEAP_P(th, env) \
(!((th)->stack < (env) && (env) < ((th)->stack + (th)->stack_size)))
#define ENV_VAL(env) ((env)[1])
static void
env_mark(void * const ptr)
{
RUBY_MARK_ENTER("env");
if (ptr) {
const rb_env_t * const env = ptr;
if (env->env) {
/* TODO: should mark more restricted range */
RUBY_GC_INFO("env->env\n");
rb_gc_mark_locations(env->env, env->env + env->env_size);
}
RUBY_GC_INFO("env->prev_envval\n");
RUBY_MARK_UNLESS_NULL(env->prev_envval);
RUBY_MARK_UNLESS_NULL(env->block.self);
RUBY_MARK_UNLESS_NULL(env->block.proc);
if (env->block.iseq) {
if (BUILTIN_TYPE(env->block.iseq) == T_NODE) {
RUBY_MARK_UNLESS_NULL((VALUE)env->block.iseq);
}
else {
RUBY_MARK_UNLESS_NULL(env->block.iseq->self);
}
}
}
RUBY_MARK_LEAVE("env");
}
static void
env_free(void * const ptr)
{
RUBY_FREE_ENTER("env");
if (ptr) {
rb_env_t *const env = ptr;
RUBY_FREE_UNLESS_NULL(env->env);
ruby_xfree(ptr);
}
RUBY_FREE_LEAVE("env");
}
static size_t
env_memsize(const void *ptr)
{
if (ptr) {
const rb_env_t * const env = ptr;
size_t size = sizeof(rb_env_t);
if (env->env) {
size += env->env_size * sizeof(VALUE);
}
return size;
}
return 0;
}
static const rb_data_type_t env_data_type = {
"VM/env",
{env_mark, env_free, env_memsize,},
};
static VALUE
env_alloc(void)
{
VALUE obj;
rb_env_t *env;
obj = TypedData_Make_Struct(rb_cEnv, rb_env_t, &env_data_type, env);
env->env = 0;
env->prev_envval = 0;
env->block.iseq = 0;
return obj;
}
static VALUE check_env_value(VALUE envval);
static int
check_env(rb_env_t * const env)
{
fprintf(stderr, "---\n");
fprintf(stderr, "envptr: %p\n", (void *)&env->block.dfp[0]);
fprintf(stderr, "envval: %10p ", (void *)env->block.dfp[1]);
dp(env->block.dfp[1]);
fprintf(stderr, "lfp: %10p\n", (void *)env->block.lfp);
fprintf(stderr, "dfp: %10p\n", (void *)env->block.dfp);
if (env->prev_envval) {
fprintf(stderr, ">>\n");
check_env_value(env->prev_envval);
fprintf(stderr, "<<\n");
}
return 1;
}
static VALUE
check_env_value(VALUE envval)
{
rb_env_t *env;
GetEnvPtr(envval, env);
if (check_env(env)) {
return envval;
}
rb_bug("invalid env");
return Qnil; /* unreachable */
}
static VALUE
vm_make_env_each(rb_thread_t * const th, rb_control_frame_t * const cfp,
VALUE *envptr, VALUE * const endptr)
{
VALUE envval, penvval = 0;
rb_env_t *env;
VALUE *nenvptr;
int i, local_size;
if (ENV_IN_HEAP_P(th, envptr)) {
return ENV_VAL(envptr);
}
if (envptr != endptr) {
VALUE *penvptr = GC_GUARDED_PTR_REF(*envptr);
rb_control_frame_t *pcfp = cfp;
if (ENV_IN_HEAP_P(th, penvptr)) {
penvval = ENV_VAL(penvptr);
}
else {
while (pcfp->dfp != penvptr) {
pcfp++;
if (pcfp->dfp == 0) {
SDR();
rb_bug("invalid dfp");
}
}
penvval = vm_make_env_each(th, pcfp, penvptr, endptr);
cfp->lfp = pcfp->lfp;
*envptr = GC_GUARDED_PTR(pcfp->dfp);
}
}
/* allocate env */
envval = env_alloc();
GetEnvPtr(envval, env);
if (!RUBY_VM_NORMAL_ISEQ_P(cfp->iseq)) {
local_size = 2;
}
else {
local_size = cfp->iseq->local_size;
}
env->env_size = local_size + 1 + 1;
env->local_size = local_size;
env->env = ALLOC_N(VALUE, env->env_size);
env->prev_envval = penvval;
for (i = 0; i <= local_size; i++) {
env->env[i] = envptr[-local_size + i];
#if 0
fprintf(stderr, "%2d ", &envptr[-local_size + i] - th->stack); dp(env->env[i]);
if (RUBY_VM_NORMAL_ISEQ_P(cfp->iseq)) {
/* clear value stack for GC */
envptr[-local_size + i] = 0;
}
#endif
}
*envptr = envval; /* GC mark */
nenvptr = &env->env[i - 1];
nenvptr[1] = envval; /* frame self */
/* reset lfp/dfp in cfp */
cfp->dfp = nenvptr;
if (envptr == endptr) {
cfp->lfp = nenvptr;
}
/* as Binding */
env->block.self = cfp->self;
env->block.lfp = cfp->lfp;
env->block.dfp = cfp->dfp;
env->block.iseq = cfp->iseq;
if (!RUBY_VM_NORMAL_ISEQ_P(cfp->iseq)) {
/* TODO */
env->block.iseq = 0;
} else {
rb_vm_rewrite_dfp_in_errinfo(th, cfp);
}
return envval;
}
static int
collect_local_variables_in_iseq(rb_iseq_t *iseq, const VALUE ary)
{
int i;
if (!iseq) return 0;
for (i = 0; i < iseq->local_table_size; i++) {
ID lid = iseq->local_table[i];
if (rb_is_local_id(lid)) {
rb_ary_push(ary, ID2SYM(lid));
}
}
return 1;
}
static int
collect_local_variables_in_env(rb_env_t * env, const VALUE ary)
{
while (collect_local_variables_in_iseq(env->block.iseq, ary),
env->prev_envval) {
GetEnvPtr(env->prev_envval, env);
}
return 0;
}
static int
vm_collect_local_variables_in_heap(rb_thread_t *th, VALUE *dfp, VALUE ary)
{
if (ENV_IN_HEAP_P(th, dfp)) {
rb_env_t *env;
GetEnvPtr(ENV_VAL(dfp), env);
collect_local_variables_in_env(env, ary);
return 1;
}
else {
return 0;
}
}
VALUE
rb_vm_make_env_object(rb_thread_t * th, rb_control_frame_t *cfp)
{
VALUE envval;
if (VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_FINISH) {
/* for method_missing */
cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
}
envval = vm_make_env_each(th, cfp, cfp->dfp, cfp->lfp);
if (PROCDEBUG) {
check_env_value(envval);
}
return envval;
}
void
rb_vm_rewrite_dfp_in_errinfo(rb_thread_t *th, rb_control_frame_t *cfp)
{
/* rewrite dfp in errinfo to point to heap */
if (RUBY_VM_NORMAL_ISEQ_P(cfp->iseq) &&
(cfp->iseq->type == ISEQ_TYPE_RESCUE ||
cfp->iseq->type == ISEQ_TYPE_ENSURE)) {
VALUE errinfo = cfp->dfp[-2]; /* #$! */
if (RB_TYPE_P(errinfo, T_NODE)) {
VALUE *escape_dfp = GET_THROWOBJ_CATCH_POINT(errinfo);
if (! ENV_IN_HEAP_P(th, escape_dfp)) {
VALUE dfpval = *escape_dfp;
if (CLASS_OF(dfpval) == rb_cEnv) {
rb_env_t *dfpenv;
GetEnvPtr(dfpval, dfpenv);
SET_THROWOBJ_CATCH_POINT(errinfo, (VALUE)(dfpenv->env + dfpenv->local_size));
}
}
}
}
}
void
rb_vm_stack_to_heap(rb_thread_t *th)
{
rb_control_frame_t *cfp = th->cfp;
while ((cfp = rb_vm_get_ruby_level_next_cfp(th, cfp)) != 0) {
rb_vm_make_env_object(th, cfp);
cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
}
}
/* Proc */
static VALUE
vm_make_proc_from_block(rb_thread_t *th, rb_block_t *block)
{
if (!block->proc) {
block->proc = rb_vm_make_proc(th, block, rb_cProc);
}
return block->proc;
}
VALUE
rb_vm_make_proc(rb_thread_t *th, const rb_block_t *block, VALUE klass)
{
VALUE procval, envval, blockprocval = 0;
rb_proc_t *proc;
rb_control_frame_t *cfp = RUBY_VM_GET_CFP_FROM_BLOCK_PTR(block);
if (block->proc) {
rb_bug("rb_vm_make_proc: Proc value is already created.");
}
if (GC_GUARDED_PTR_REF(cfp->lfp[0])) {
rb_proc_t *p;
blockprocval = vm_make_proc_from_block(
th, (rb_block_t *)GC_GUARDED_PTR_REF(*cfp->lfp));
GetProcPtr(blockprocval, p);
*cfp->lfp = GC_GUARDED_PTR(&p->block);
}
envval = rb_vm_make_env_object(th, cfp);
if (PROCDEBUG) {
check_env_value(envval);
}
procval = rb_proc_alloc(klass);
GetProcPtr(procval, proc);
proc->blockprocval = blockprocval;
proc->block.self = block->self;
proc->block.lfp = block->lfp;
proc->block.dfp = block->dfp;
proc->block.iseq = block->iseq;
proc->block.proc = procval;
proc->envval = envval;
proc->safe_level = th->safe_level;
if (VMDEBUG) {
if (th->stack < block->dfp && block->dfp < th->stack + th->stack_size) {
rb_bug("invalid ptr: block->dfp");
}
if (th->stack < block->lfp && block->lfp < th->stack + th->stack_size) {
rb_bug("invalid ptr: block->lfp");
}
}
return procval;
}
/* C -> Ruby: block */
static inline VALUE
invoke_block_from_c(rb_thread_t *th, const rb_block_t *block,
VALUE self, int argc, const VALUE *argv,
const rb_block_t *blockptr, const NODE *cref)
{
if (SPECIAL_CONST_P(block->iseq))
return Qnil;
else if (BUILTIN_TYPE(block->iseq) != T_NODE) {
const rb_iseq_t *iseq = block->iseq;
const rb_control_frame_t *cfp;
rb_control_frame_t *ncfp;
int i, opt_pc, arg_size = iseq->arg_size;
int type = block_proc_is_lambda(block->proc) ?
VM_FRAME_MAGIC_LAMBDA : VM_FRAME_MAGIC_BLOCK;
rb_vm_set_finish_env(th);
cfp = th->cfp;
CHECK_STACK_OVERFLOW(cfp, argc + iseq->stack_max);
for (i=0; i<argc; i++) {
cfp->sp[i] = argv[i];
}
opt_pc = vm_yield_setup_args(th, iseq, argc, cfp->sp, blockptr,
type == VM_FRAME_MAGIC_LAMBDA);
ncfp = vm_push_frame(th, iseq, type,
self, GC_GUARDED_PTR(block->dfp),
iseq->iseq_encoded + opt_pc, cfp->sp + arg_size, block->lfp,
iseq->local_size - arg_size);
ncfp->me = th->passed_me;
th->passed_me = 0;
th->passed_block = blockptr;
if (cref) {
th->cfp->dfp[-1] = (VALUE)cref;
}
return vm_exec(th);
}
else {
return vm_yield_with_cfunc(th, block, self, argc, argv, blockptr);
}
}
static inline const rb_block_t *
check_block(rb_thread_t *th)
{
const rb_block_t *blockptr = GC_GUARDED_PTR_REF(th->cfp->lfp[0]);
if (blockptr == 0) {
rb_vm_localjump_error("no block given", Qnil, 0);
}
return blockptr;
}
static inline VALUE
vm_yield_with_cref(rb_thread_t *th, int argc, const VALUE *argv, const NODE *cref)
{
const rb_block_t *blockptr = check_block(th);
return invoke_block_from_c(th, blockptr, blockptr->self, argc, argv, 0, cref);
}
static inline VALUE
vm_yield(rb_thread_t *th, int argc, const VALUE *argv)
{
const rb_block_t *blockptr = check_block(th);
return invoke_block_from_c(th, blockptr, blockptr->self, argc, argv, 0, 0);
}
VALUE
rb_vm_invoke_proc(rb_thread_t *th, rb_proc_t *proc, VALUE self,
int argc, const VALUE *argv, const rb_block_t * blockptr)
{
VALUE val = Qundef;
int state;
volatile int stored_safe = th->safe_level;
TH_PUSH_TAG(th);
if ((state = EXEC_TAG()) == 0) {
if (!proc->is_from_method) {
th->safe_level = proc->safe_level;
}
val = invoke_block_from_c(th, &proc->block, self, argc, argv, blockptr, 0);
}
TH_POP_TAG();
if (!proc->is_from_method) {
th->safe_level = stored_safe;
}
if (state) {
JUMP_TAG(state);
}
return val;
}
/* special variable */
static rb_control_frame_t *
vm_normal_frame(rb_thread_t *th, rb_control_frame_t *cfp)
{
while (cfp->pc == 0) {
cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
if (RUBY_VM_CONTROL_FRAME_STACK_OVERFLOW_P(th, cfp)) {
return 0;
}
}
return cfp;
}
static VALUE
vm_cfp_svar_get(rb_thread_t *th, rb_control_frame_t *cfp, VALUE key)
{
cfp = vm_normal_frame(th, cfp);
return lfp_svar_get(th, cfp ? cfp->lfp : 0, key);
}
static void
vm_cfp_svar_set(rb_thread_t *th, rb_control_frame_t *cfp, VALUE key, const VALUE val)
{
cfp = vm_normal_frame(th, cfp);
lfp_svar_set(th, cfp ? cfp->lfp : 0, key, val);
}
static VALUE
vm_svar_get(VALUE key)
{
rb_thread_t *th = GET_THREAD();
return vm_cfp_svar_get(th, th->cfp, key);
}
static void
vm_svar_set(VALUE key, VALUE val)
{
rb_thread_t *th = GET_THREAD();
vm_cfp_svar_set(th, th->cfp, key, val);
}
VALUE
rb_backref_get(void)
{
return vm_svar_get(1);
}
void
rb_backref_set(VALUE val)
{
vm_svar_set(1, val);
}
VALUE
rb_lastline_get(void)
{
return vm_svar_get(0);
}
void
rb_lastline_set(VALUE val)
{
vm_svar_set(0, val);
}
/* backtrace */
int
rb_vm_get_sourceline(const rb_control_frame_t *cfp)
{
int line_no = 0;
const rb_iseq_t *iseq = cfp->iseq;
if (RUBY_VM_NORMAL_ISEQ_P(iseq)) {
size_t pos = cfp->pc - cfp->iseq->iseq_encoded;
line_no = rb_iseq_line_no(iseq, pos);
}
return line_no;
}
static int
vm_backtrace_each(rb_thread_t *th, int lev, void (*init)(void *), rb_backtrace_iter_func *iter, void *arg)
{
const rb_control_frame_t *limit_cfp = th->cfp;
const rb_control_frame_t *cfp = (void *)(th->stack + th->stack_size);
VALUE file = Qnil;
int line_no = 0;
cfp -= 2;
while (lev-- >= 0) {
if (++limit_cfp > cfp) {
return FALSE;
}
}
if (init) (*init)(arg);
limit_cfp = RUBY_VM_NEXT_CONTROL_FRAME(limit_cfp);
if (th->vm->progname) file = th->vm->progname;
while (cfp > limit_cfp) {
if (cfp->iseq != 0) {
if (cfp->pc != 0) {
rb_iseq_t *iseq = cfp->iseq;
line_no = rb_vm_get_sourceline(cfp);
file = iseq->filename;
if ((*iter)(arg, file, line_no, iseq->name)) break;
}
}
else if (RUBYVM_CFUNC_FRAME_P(cfp)) {
ID id;
extern VALUE ruby_engine_name;
if (NIL_P(file)) file = ruby_engine_name;
if (cfp->me->def)
id = cfp->me->def->original_id;
else
id = cfp->me->called_id;
if (id != ID_ALLOCATOR && (*iter)(arg, file, line_no, rb_id2str(id)))
break;
}
cfp = RUBY_VM_NEXT_CONTROL_FRAME(cfp);
}
return TRUE;
}
static void
vm_backtrace_alloc(void *arg)
{
VALUE *aryp = arg;
*aryp = rb_ary_new();
}
static int
vm_backtrace_push(void *arg, VALUE file, int line_no, VALUE name)
{
VALUE *aryp = arg;
VALUE bt;
if (line_no) {
bt = rb_enc_sprintf(rb_enc_compatible(file, name), "%s:%d:in `%s'",
RSTRING_PTR(file), line_no, RSTRING_PTR(name));
}
else {
bt = rb_enc_sprintf(rb_enc_compatible(file, name), "%s:in `%s'",
RSTRING_PTR(file), RSTRING_PTR(name));
}
rb_ary_push(*aryp, bt);
return 0;
}
static inline VALUE
vm_backtrace(rb_thread_t *th, int lev)
{
VALUE ary = 0;
if (lev < 0) {
ary = rb_ary_new();
}
vm_backtrace_each(th, lev, vm_backtrace_alloc, vm_backtrace_push, &ary);
if (!ary) return Qnil;
return rb_ary_reverse(ary);
}
VALUE
rb_sourcefilename(void)
{
rb_thread_t *th = GET_THREAD();
rb_control_frame_t *cfp = rb_vm_get_ruby_level_next_cfp(th, th->cfp);
if (cfp) {
return cfp->iseq->filename;
}
else {
return Qnil;
}
}
const char *
rb_sourcefile(void)
{
rb_thread_t *th = GET_THREAD();
rb_control_frame_t *cfp = rb_vm_get_ruby_level_next_cfp(th, th->cfp);
if (cfp) {
return RSTRING_PTR(cfp->iseq->filename);
}
else {
return 0;
}
}
int
rb_sourceline(void)
{
rb_thread_t *th = GET_THREAD();
rb_control_frame_t *cfp = rb_vm_get_ruby_level_next_cfp(th, th->cfp);
if (cfp) {
return rb_vm_get_sourceline(cfp);
}
else {
return 0;
}
}
NODE *
rb_vm_cref(void)
{
rb_thread_t *th = GET_THREAD();
rb_control_frame_t *cfp = rb_vm_get_ruby_level_next_cfp(th, th->cfp);
if (cfp == 0) {
rb_raise(rb_eRuntimeError, "Can't call on top of Fiber or Thread");
}
return vm_get_cref(cfp->iseq, cfp->lfp, cfp->dfp);
}
#if 0
void
debug_cref(NODE *cref)
{
while (cref) {
dp(cref->nd_clss);
printf("%ld\n", cref->nd_visi);
cref = cref->nd_next;
}
}
#endif
VALUE
rb_vm_cbase(void)
{
rb_thread_t *th = GET_THREAD();
rb_control_frame_t *cfp = rb_vm_get_ruby_level_next_cfp(th, th->cfp);
if (cfp == 0) {
rb_raise(rb_eRuntimeError, "Can't call on top of Fiber or Thread");
}
return vm_get_cbase(cfp->iseq, cfp->lfp, cfp->dfp);
}
/* jump */
static VALUE
make_localjump_error(const char *mesg, VALUE value, int reason)
{
extern VALUE rb_eLocalJumpError;
VALUE exc = rb_exc_new2(rb_eLocalJumpError, mesg);
ID id;
switch (reason) {
case TAG_BREAK:
CONST_ID(id, "break");
break;
case TAG_REDO:
CONST_ID(id, "redo");
break;
case TAG_RETRY:
CONST_ID(id, "retry");
break;
case TAG_NEXT:
CONST_ID(id, "next");
break;
case TAG_RETURN:
CONST_ID(id, "return");
break;
default:
CONST_ID(id, "noreason");
break;
}
rb_iv_set(exc, "@exit_value", value);
rb_iv_set(exc, "@reason", ID2SYM(id));
return exc;
}
void
rb_vm_localjump_error(const char *mesg, VALUE value, int reason)
{
VALUE exc = make_localjump_error(mesg, value, reason);
rb_exc_raise(exc);
}
VALUE
rb_vm_make_jump_tag_but_local_jump(int state, VALUE val)
{
VALUE result = Qnil;
if (val == Qundef) {
val = GET_THREAD()->tag->retval;
}
switch (state) {
case 0:
break;
case TAG_RETURN:
result = make_localjump_error("unexpected return", val, state);
break;
case TAG_BREAK:
result = make_localjump_error("unexpected break", val, state);
break;
case TAG_NEXT:
result = make_localjump_error("unexpected next", val, state);
break;
case TAG_REDO:
result = make_localjump_error("unexpected redo", Qnil, state);
break;
case TAG_RETRY:
result = make_localjump_error("retry outside of rescue clause", Qnil, state);
break;
default:
break;
}
return result;
}
void
rb_vm_jump_tag_but_local_jump(int state, VALUE val)
{
if (val != Qnil) {
VALUE exc = rb_vm_make_jump_tag_but_local_jump(state, val);
rb_exc_raise(exc);
}
JUMP_TAG(state);
}
NORETURN(static void vm_iter_break(rb_thread_t *th, VALUE val));
static void
vm_iter_break(rb_thread_t *th, VALUE val)
{
rb_control_frame_t *cfp = th->cfp;
VALUE *dfp = GC_GUARDED_PTR_REF(*cfp->dfp);
th->state = TAG_BREAK;
th->errinfo = (VALUE)NEW_THROW_OBJECT(val, (VALUE)dfp, TAG_BREAK);
TH_JUMP_TAG(th, TAG_BREAK);