-
Notifications
You must be signed in to change notification settings - Fork 2
/
eval.c
2124 lines (1877 loc) · 53.4 KB
/
eval.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
/**********************************************************************
eval.c -
$Author$
created at: Thu Jun 10 14:22:17 JST 1993
Copyright (C) 1993-2007 Yukihiro Matsumoto
Copyright (C) 2000 Network Applied Communication Laboratory, Inc.
Copyright (C) 2000 Information-technology Promotion Agency, Japan
**********************************************************************/
#include "ruby/internal/config.h"
#ifdef HAVE_SYS_PRCTL_H
#include <sys/prctl.h>
#endif
#include "eval_intern.h"
#include "internal.h"
#include "internal/class.h"
#include "internal/cont.h"
#include "internal/error.h"
#include "internal/eval.h"
#include "internal/gc.h"
#include "internal/hash.h"
#include "internal/inits.h"
#include "internal/io.h"
#include "internal/object.h"
#include "internal/thread.h"
#include "internal/variable.h"
#include "ruby/fiber/scheduler.h"
#include "iseq.h"
#include "rjit.h"
#include "probes.h"
#include "probes_helper.h"
#include "ruby/vm.h"
#include "vm_core.h"
#include "ractor_core.h"
NORETURN(static void rb_raise_jump(VALUE, VALUE));
void rb_ec_clear_current_thread_trace_func(const rb_execution_context_t *ec);
void rb_ec_clear_all_trace_func(const rb_execution_context_t *ec);
static int rb_ec_cleanup(rb_execution_context_t *ec, enum ruby_tag_type ex);
static int rb_ec_exec_node(rb_execution_context_t *ec, void *n);
VALUE rb_eLocalJumpError;
VALUE rb_eSysStackError;
ID ruby_static_id_signo, ruby_static_id_status;
extern ID ruby_static_id_cause;
#define id_cause ruby_static_id_cause
#define exception_error GET_VM()->special_exceptions[ruby_error_reenter]
#include "eval_error.c"
#include "eval_jump.c"
#define CLASS_OR_MODULE_P(obj) \
(!SPECIAL_CONST_P(obj) && \
(BUILTIN_TYPE(obj) == T_CLASS || BUILTIN_TYPE(obj) == T_MODULE))
int
ruby_setup(void)
{
enum ruby_tag_type state;
if (GET_VM())
return 0;
/*
* Disable THP early before mallocs happen because we want this to
* affect as many future pages as possible for CoW-friendliness
*/
#if defined(__linux__) && defined(PR_SET_THP_DISABLE)
prctl(PR_SET_THP_DISABLE, 1, 0, 0, 0);
#endif
Init_BareVM();
Init_heap();
rb_vm_encoded_insn_data_table_init();
Init_vm_objects();
EC_PUSH_TAG(GET_EC());
if ((state = EC_EXEC_TAG()) == TAG_NONE) {
rb_call_inits();
ruby_prog_init();
GET_VM()->running = 1;
}
EC_POP_TAG();
return state;
}
void
ruby_init(void)
{
int state = ruby_setup();
if (state) {
if (RTEST(ruby_debug)) {
rb_execution_context_t *ec = GET_EC();
rb_ec_error_print(ec, ec->errinfo);
}
exit(EXIT_FAILURE);
}
}
void *
ruby_options(int argc, char **argv)
{
rb_execution_context_t *ec = GET_EC();
enum ruby_tag_type state;
void *volatile iseq = 0;
EC_PUSH_TAG(ec);
if ((state = EC_EXEC_TAG()) == TAG_NONE) {
iseq = ruby_process_options(argc, argv);
}
else {
rb_ec_clear_current_thread_trace_func(ec);
int exitcode = error_handle(ec, ec->errinfo, state);
ec->errinfo = Qnil; /* just been handled */
iseq = (void *)INT2FIX(exitcode);
}
EC_POP_TAG();
return iseq;
}
static void
rb_ec_fiber_scheduler_finalize(rb_execution_context_t *ec)
{
enum ruby_tag_type state;
EC_PUSH_TAG(ec);
if ((state = EC_EXEC_TAG()) == TAG_NONE) {
rb_fiber_scheduler_set(Qnil);
}
else {
state = error_handle(ec, ec->errinfo, state);
}
EC_POP_TAG();
}
static void
rb_ec_teardown(rb_execution_context_t *ec)
{
// If the user code defined a scheduler for the top level thread, run it:
rb_ec_fiber_scheduler_finalize(ec);
EC_PUSH_TAG(ec);
if (EC_EXEC_TAG() == TAG_NONE) {
rb_vm_trap_exit(rb_ec_vm_ptr(ec));
}
EC_POP_TAG();
rb_ec_exec_end_proc(ec);
rb_ec_clear_all_trace_func(ec);
}
static void
rb_ec_finalize(rb_execution_context_t *ec)
{
ruby_sig_finalize();
ec->errinfo = Qnil;
rb_objspace_call_finalizer(rb_ec_vm_ptr(ec)->objspace);
}
void
ruby_finalize(void)
{
rb_execution_context_t *ec = GET_EC();
rb_ec_teardown(ec);
rb_ec_finalize(ec);
}
int
ruby_cleanup(int ex)
{
return rb_ec_cleanup(GET_EC(), (enum ruby_tag_type)ex);
}
static int
rb_ec_cleanup(rb_execution_context_t *ec, enum ruby_tag_type ex)
{
int state;
volatile VALUE save_error = Qundef;
volatile int sysex = EXIT_SUCCESS;
volatile int signaled = 0;
rb_thread_t *th = rb_ec_thread_ptr(ec);
rb_thread_t *const volatile th0 = th;
volatile int step = 0;
volatile VALUE message = Qnil;
VALUE buf;
rb_threadptr_interrupt(th);
rb_threadptr_check_signal(th);
EC_PUSH_TAG(ec);
if ((state = EC_EXEC_TAG()) == TAG_NONE) {
RUBY_VM_CHECK_INTS(ec);
step_0: step++;
save_error = ec->errinfo;
if (THROW_DATA_P(ec->errinfo)) ec->errinfo = Qnil;
/* exits with failure but silently when an exception raised
* here */
rb_ec_teardown(ec);
step_1: step++;
VALUE err = ec->errinfo;
volatile int mode0 = 0, mode1 = 0;
if (err != save_error && !NIL_P(err)) {
mode0 = exiting_split(err, &sysex, &signaled);
}
/* exceptions after here will be ignored */
/* build error message including causes */
err = ATOMIC_VALUE_EXCHANGE(save_error, Qnil);
if (!NIL_P(err) && !THROW_DATA_P(err)) {
mode1 = exiting_split(err, (mode0 & EXITING_WITH_STATUS) ? NULL : &sysex, &signaled);
if (mode1 & EXITING_WITH_MESSAGE) {
buf = rb_str_new(NULL, 0);
rb_ec_error_print_detailed(ec, err, buf, Qundef);
message = buf;
}
}
step_2: step++;
/* protect from Thread#raise */
th->status = THREAD_KILLED;
rb_ractor_terminate_all();
step_3: step++;
if (!NIL_P(buf = message)) {
warn_print_str(buf);
}
else if (!NIL_OR_UNDEF_P(err = save_error) ||
(ex != TAG_NONE && !((mode0|mode1) & EXITING_WITH_STATUS))) {
sysex = error_handle(ec, err, ex);
}
}
else {
th = th0;
switch (step) {
case 0: goto step_0;
case 1: goto step_1;
case 2: goto step_2;
case 3: goto step_3;
}
}
rb_ec_finalize(ec);
/* unlock again if finalizer took mutexes. */
rb_threadptr_unlock_all_locking_mutexes(th);
th = th0;
EC_POP_TAG();
th = th0;
rb_thread_stop_timer_thread();
ruby_vm_destruct(th->vm);
// For YJIT, call this after ruby_vm_destruct() frees jit_cont for the root fiber.
rb_jit_cont_finish();
if (signaled) ruby_default_signal(signaled);
return sysex;
}
static int
rb_ec_exec_node(rb_execution_context_t *ec, void *n)
{
volatile int state;
rb_iseq_t *iseq = (rb_iseq_t *)n;
if (!n) return 0;
EC_PUSH_TAG(ec);
if ((state = EC_EXEC_TAG()) == TAG_NONE) {
rb_iseq_eval_main(iseq);
}
EC_POP_TAG();
return state;
}
void
ruby_stop(int ex)
{
exit(ruby_cleanup(ex));
}
int
ruby_executable_node(void *n, int *status)
{
VALUE v = (VALUE)n;
int s;
switch (v) {
case Qtrue: s = EXIT_SUCCESS; break;
case Qfalse: s = EXIT_FAILURE; break;
default:
if (!FIXNUM_P(v)) return TRUE;
s = FIX2INT(v);
}
if (status) *status = s;
return FALSE;
}
int
ruby_run_node(void *n)
{
rb_execution_context_t *ec = GET_EC();
int status;
if (!ruby_executable_node(n, &status)) {
rb_ec_cleanup(ec, (NIL_P(ec->errinfo) ? TAG_NONE : TAG_RAISE));
return status;
}
return rb_ec_cleanup(ec, rb_ec_exec_node(ec, n));
}
int
ruby_exec_node(void *n)
{
return rb_ec_exec_node(GET_EC(), n);
}
/*
* call-seq:
* Module.nesting -> array
*
* Returns the list of +Modules+ nested at the point of call.
*
* module M1
* module M2
* $a = Module.nesting
* end
* end
* $a #=> [M1::M2, M1]
* $a[0].name #=> "M1::M2"
*/
static VALUE
rb_mod_nesting(VALUE _)
{
VALUE ary = rb_ary_new();
const rb_cref_t *cref = rb_vm_cref();
while (cref && CREF_NEXT(cref)) {
VALUE klass = CREF_CLASS(cref);
if (!CREF_PUSHED_BY_EVAL(cref) &&
!NIL_P(klass)) {
rb_ary_push(ary, klass);
}
cref = CREF_NEXT(cref);
}
return ary;
}
/*
* call-seq:
* Module.constants -> array
* Module.constants(inherited) -> array
*
* In the first form, returns an array of the names of all
* constants accessible from the point of call.
* This list includes the names of all modules and classes
* defined in the global scope.
*
* Module.constants.first(4)
* # => [:ARGF, :ARGV, :ArgumentError, :Array]
*
* Module.constants.include?(:SEEK_SET) # => false
*
* class IO
* Module.constants.include?(:SEEK_SET) # => true
* end
*
* The second form calls the instance method +constants+.
*/
static VALUE
rb_mod_s_constants(int argc, VALUE *argv, VALUE mod)
{
const rb_cref_t *cref = rb_vm_cref();
VALUE klass;
VALUE cbase = 0;
void *data = 0;
if (argc > 0 || mod != rb_cModule) {
return rb_mod_constants(argc, argv, mod);
}
while (cref) {
klass = CREF_CLASS(cref);
if (!CREF_PUSHED_BY_EVAL(cref) &&
!NIL_P(klass)) {
data = rb_mod_const_at(CREF_CLASS(cref), data);
if (!cbase) {
cbase = klass;
}
}
cref = CREF_NEXT(cref);
}
if (cbase) {
data = rb_mod_const_of(cbase, data);
}
return rb_const_list(data);
}
/*!
* Asserts that \a klass is not a frozen class.
* \param[in] klass a \c Module object
* \exception RuntimeError if \a klass is not a class or frozen.
* \ingroup class
*/
void
rb_class_modify_check(VALUE klass)
{
if (SPECIAL_CONST_P(klass)) {
Check_Type(klass, T_CLASS);
}
if (RB_TYPE_P(klass, T_MODULE)) {
rb_module_set_initialized(klass);
}
if (OBJ_FROZEN(klass)) {
const char *desc;
if (RCLASS_SINGLETON_P(klass)) {
desc = "object";
klass = RCLASS_ATTACHED_OBJECT(klass);
if (!SPECIAL_CONST_P(klass)) {
switch (BUILTIN_TYPE(klass)) {
case T_MODULE:
case T_ICLASS:
desc = "Module";
break;
case T_CLASS:
desc = "Class";
break;
default:
break;
}
}
}
else {
switch (BUILTIN_TYPE(klass)) {
case T_MODULE:
case T_ICLASS:
desc = "module";
break;
case T_CLASS:
desc = "class";
break;
default:
Check_Type(klass, T_CLASS);
UNREACHABLE;
}
}
rb_frozen_error_raise(klass, "can't modify frozen %s: %"PRIsVALUE, desc, klass);
}
}
NORETURN(static void rb_longjmp(rb_execution_context_t *, int, volatile VALUE, VALUE));
static VALUE get_errinfo(void);
#define get_ec_errinfo(ec) rb_ec_get_errinfo(ec)
static VALUE
exc_setup_cause(VALUE exc, VALUE cause)
{
#if OPT_SUPPORT_JOKE
if (NIL_P(cause)) {
ID id_true_cause;
CONST_ID(id_true_cause, "true_cause");
cause = rb_attr_get(rb_eFatal, id_true_cause);
if (NIL_P(cause)) {
cause = rb_exc_new_cstr(rb_eFatal, "because using such Ruby");
rb_ivar_set(cause, id_cause, INT2FIX(42)); /* the answer */
OBJ_FREEZE(cause);
rb_ivar_set(rb_eFatal, id_true_cause, cause);
}
}
#endif
if (!NIL_P(cause) && cause != exc) {
rb_ivar_set(exc, id_cause, cause);
if (!rb_ivar_defined(cause, id_cause)) {
rb_ivar_set(cause, id_cause, Qnil);
}
}
return exc;
}
static inline VALUE
exc_setup_message(const rb_execution_context_t *ec, VALUE mesg, VALUE *cause)
{
int nocause = 0;
int nocircular = 0;
if (NIL_P(mesg)) {
mesg = ec->errinfo;
if (INTERNAL_EXCEPTION_P(mesg)) EC_JUMP_TAG(ec, TAG_FATAL);
nocause = 1;
}
if (NIL_P(mesg)) {
mesg = rb_exc_new(rb_eRuntimeError, 0, 0);
nocause = 0;
nocircular = 1;
}
if (UNDEF_P(*cause)) {
if (nocause) {
*cause = Qnil;
nocircular = 1;
}
else if (!rb_ivar_defined(mesg, id_cause)) {
*cause = get_ec_errinfo(ec);
}
else {
nocircular = 1;
}
}
else if (!NIL_P(*cause) && !rb_obj_is_kind_of(*cause, rb_eException)) {
rb_raise(rb_eTypeError, "exception object expected");
}
if (!nocircular && !NIL_P(*cause) && !UNDEF_P(*cause) && *cause != mesg) {
#if 0 /* maybe critical for some cases */
rb_exc_check_circular_cause(*cause);
#else
VALUE c = *cause;
while (!NIL_P(c = rb_attr_get(c, id_cause))) {
if (c == mesg) {
rb_raise(rb_eArgError, "circular causes");
}
}
#endif
}
return mesg;
}
static void
setup_exception(rb_execution_context_t *ec, int tag, volatile VALUE mesg, VALUE cause)
{
VALUE e;
int line;
const char *file = rb_source_location_cstr(&line);
const char *const volatile file0 = file;
if ((file && !NIL_P(mesg)) || !UNDEF_P(cause)) {
volatile int state = 0;
EC_PUSH_TAG(ec);
if (EC_EXEC_TAG() == TAG_NONE && !(state = rb_ec_set_raised(ec))) {
VALUE bt = rb_get_backtrace(mesg);
if (!NIL_P(bt) || UNDEF_P(cause)) {
if (OBJ_FROZEN(mesg)) {
mesg = rb_obj_dup(mesg);
}
}
if (!UNDEF_P(cause) && !THROW_DATA_P(cause)) {
exc_setup_cause(mesg, cause);
}
if (NIL_P(bt)) {
VALUE at = rb_ec_backtrace_object(ec);
rb_ivar_set(mesg, idBt_locations, at);
set_backtrace(mesg, at);
}
rb_ec_reset_raised(ec);
}
EC_POP_TAG();
file = file0;
if (state) goto fatal;
}
if (!NIL_P(mesg)) {
ec->errinfo = mesg;
}
if (RTEST(ruby_debug) && !NIL_P(e = ec->errinfo) &&
!rb_obj_is_kind_of(e, rb_eSystemExit)) {
enum ruby_tag_type state;
mesg = e;
EC_PUSH_TAG(ec);
if ((state = EC_EXEC_TAG()) == TAG_NONE) {
ec->errinfo = Qnil;
e = rb_obj_as_string(mesg);
ec->errinfo = mesg;
if (file && line) {
e = rb_sprintf("Exception '%"PRIsVALUE"' at %s:%d - %"PRIsVALUE"\n",
rb_obj_class(mesg), file, line, e);
}
else if (file) {
e = rb_sprintf("Exception '%"PRIsVALUE"' at %s - %"PRIsVALUE"\n",
rb_obj_class(mesg), file, e);
}
else {
e = rb_sprintf("Exception '%"PRIsVALUE"' - %"PRIsVALUE"\n",
rb_obj_class(mesg), e);
}
warn_print_str(e);
}
EC_POP_TAG();
if (state == TAG_FATAL && ec->errinfo == exception_error) {
ec->errinfo = mesg;
}
else if (state) {
rb_ec_reset_raised(ec);
EC_JUMP_TAG(ec, state);
}
}
if (rb_ec_set_raised(ec)) {
goto fatal;
}
if (tag != TAG_FATAL) {
RUBY_DTRACE_HOOK(RAISE, rb_obj_classname(ec->errinfo));
EXEC_EVENT_HOOK(ec, RUBY_EVENT_RAISE, ec->cfp->self, 0, 0, 0, mesg);
}
return;
fatal:
ec->errinfo = exception_error;
rb_ec_reset_raised(ec);
EC_JUMP_TAG(ec, TAG_FATAL);
}
/*! \private */
void
rb_ec_setup_exception(const rb_execution_context_t *ec, VALUE mesg, VALUE cause)
{
if (UNDEF_P(cause)) {
cause = get_ec_errinfo(ec);
}
if (cause != mesg) {
if (THROW_DATA_P(cause)) {
cause = Qnil;
}
rb_ivar_set(mesg, id_cause, cause);
}
}
static void
rb_longjmp(rb_execution_context_t *ec, int tag, volatile VALUE mesg, VALUE cause)
{
mesg = exc_setup_message(ec, mesg, &cause);
setup_exception(ec, tag, mesg, cause);
rb_ec_raised_clear(ec);
EC_JUMP_TAG(ec, tag);
}
static VALUE make_exception(int argc, const VALUE *argv, int isstr);
NORETURN(static void rb_exc_exception(VALUE mesg, int tag, VALUE cause));
static void
rb_exc_exception(VALUE mesg, int tag, VALUE cause)
{
if (!NIL_P(mesg)) {
mesg = make_exception(1, &mesg, FALSE);
}
rb_longjmp(GET_EC(), tag, mesg, cause);
}
/*!
* Raises an exception in the current thread.
* \param[in] mesg an Exception class or an \c Exception object.
* \exception always raises an instance of the given exception class or
* the given \c Exception object.
* \ingroup exception
*/
void
rb_exc_raise(VALUE mesg)
{
rb_exc_exception(mesg, TAG_RAISE, Qundef);
}
/*!
* Raises a fatal error in the current thread.
*
* Same as rb_exc_raise() but raises a fatal error, which Ruby codes
* cannot rescue.
* \ingroup exception
*/
void
rb_exc_fatal(VALUE mesg)
{
rb_exc_exception(mesg, TAG_FATAL, Qnil);
}
void
rb_interrupt(void)
{
rb_exc_raise(rb_exc_new(rb_eInterrupt, 0, 0));
}
enum {raise_opt_cause, raise_max_opt}; /*< \private */
static int
extract_raise_opts(int argc, VALUE *argv, VALUE *opts)
{
int i;
if (argc > 0) {
VALUE opt;
argc = rb_scan_args(argc, argv, "*:", NULL, &opt);
if (!NIL_P(opt)) {
if (!RHASH_EMPTY_P(opt)) {
ID keywords[1];
CONST_ID(keywords[0], "cause");
rb_get_kwargs(opt, keywords, 0, -1-raise_max_opt, opts);
if (!RHASH_EMPTY_P(opt)) argv[argc++] = opt;
return argc;
}
}
}
for (i = 0; i < raise_max_opt; ++i) {
opts[i] = Qundef;
}
return argc;
}
VALUE
rb_f_raise(int argc, VALUE *argv)
{
VALUE err;
VALUE opts[raise_max_opt], *const cause = &opts[raise_opt_cause];
argc = extract_raise_opts(argc, argv, opts);
if (argc == 0) {
if (!UNDEF_P(*cause)) {
rb_raise(rb_eArgError, "only cause is given with no arguments");
}
err = get_errinfo();
if (!NIL_P(err)) {
argc = 1;
argv = &err;
}
}
rb_raise_jump(rb_make_exception(argc, argv), *cause);
UNREACHABLE_RETURN(Qnil);
}
/*
* call-seq:
* raise
* raise(string, cause: $!)
* raise(exception [, string [, array]], cause: $!)
* fail
* fail(string, cause: $!)
* fail(exception [, string [, array]], cause: $!)
*
* With no arguments, raises the exception in <code>$!</code> or raises
* a RuntimeError if <code>$!</code> is +nil+. With a single +String+
* argument, raises a +RuntimeError+ with the string as a message. Otherwise,
* the first parameter should be an +Exception+ class (or another
* object that returns an +Exception+ object when sent an +exception+
* message). The optional second parameter sets the message associated with
* the exception (accessible via Exception#message), and the third parameter
* is an array of callback information (accessible via Exception#backtrace).
* The +cause+ of the generated exception (accessible via Exception#cause)
* is automatically set to the "current" exception (<code>$!</code>), if any.
* An alternative value, either an +Exception+ object or +nil+, can be
* specified via the +:cause+ argument.
*
* Exceptions are caught by the +rescue+ clause of
* <code>begin...end</code> blocks.
*
* raise "Failed to create socket"
* raise ArgumentError, "No parameters", caller
*/
static VALUE
f_raise(int c, VALUE *v, VALUE _)
{
return rb_f_raise(c, v);
}
static VALUE
make_exception(int argc, const VALUE *argv, int isstr)
{
VALUE mesg, exc;
mesg = Qnil;
switch (argc) {
case 0:
return Qnil;
case 1:
exc = argv[0];
if (isstr &&! NIL_P(exc)) {
mesg = rb_check_string_type(exc);
if (!NIL_P(mesg)) {
return rb_exc_new3(rb_eRuntimeError, mesg);
}
}
case 2:
case 3:
break;
default:
rb_error_arity(argc, 0, 3);
}
if (NIL_P(mesg)) {
mesg = rb_check_funcall(argv[0], idException, argc != 1, &argv[1]);
}
if (UNDEF_P(mesg)) {
rb_raise(rb_eTypeError, "exception class/object expected");
}
if (!rb_obj_is_kind_of(mesg, rb_eException)) {
rb_raise(rb_eTypeError, "exception object expected");
}
if (argc == 3) {
set_backtrace(mesg, argv[2]);
}
return mesg;
}
VALUE
rb_make_exception(int argc, const VALUE *argv)
{
return make_exception(argc, argv, TRUE);
}
/*! \private
*/
static void
rb_raise_jump(VALUE mesg, VALUE cause)
{
rb_execution_context_t *ec = GET_EC();
const rb_control_frame_t *cfp = ec->cfp;
const rb_callable_method_entry_t *me = rb_vm_frame_method_entry(cfp);
VALUE klass = me->owner;
VALUE self = cfp->self;
ID mid = me->called_id;
rb_vm_pop_frame(ec);
EXEC_EVENT_HOOK(ec, RUBY_EVENT_C_RETURN, self, me->def->original_id, mid, klass, Qnil);
rb_longjmp(ec, TAG_RAISE, mesg, cause);
}
void
rb_jump_tag(int tag)
{
if (UNLIKELY(tag < TAG_RETURN || tag > TAG_FATAL)) {
unknown_longjmp_status(tag);
}
EC_JUMP_TAG(GET_EC(), tag);
}
int
rb_block_given_p(void)
{
if (rb_vm_frame_block_handler(GET_EC()->cfp) == VM_BLOCK_HANDLER_NONE) {
return FALSE;
}
else {
return TRUE;
}
}
int rb_vm_cframe_keyword_p(const rb_control_frame_t *cfp);
int
rb_keyword_given_p(void)
{
return rb_vm_cframe_keyword_p(GET_EC()->cfp);
}
VALUE rb_eThreadError;
void
rb_need_block(void)
{
if (!rb_block_given_p()) {
rb_vm_localjump_error("no block given", Qnil, 0);
}
}
VALUE
rb_rescue2(VALUE (* b_proc) (VALUE), VALUE data1,
VALUE (* r_proc) (VALUE, VALUE), VALUE data2, ...)
{
va_list ap;
va_start(ap, data2);
VALUE ret = rb_vrescue2(b_proc, data1, r_proc, data2, ap);
va_end(ap);
return ret;
}
VALUE
rb_vrescue2(VALUE (* b_proc) (VALUE), VALUE data1,
VALUE (* r_proc) (VALUE, VALUE), VALUE data2,
va_list args)
{
enum ruby_tag_type state;
rb_execution_context_t * volatile ec = GET_EC();
rb_control_frame_t *volatile cfp = ec->cfp;
volatile VALUE result = Qfalse;
volatile VALUE e_info = ec->errinfo;
EC_PUSH_TAG(ec);
if ((state = EC_EXEC_TAG()) == TAG_NONE) {
retry_entry:
result = (*b_proc) (data1);
}
else if (result) {
/* escape from r_proc */
if (state == TAG_RETRY) {
state = TAG_NONE;
ec->errinfo = Qnil;
result = Qfalse;
goto retry_entry;
}
}
else {
rb_vm_rewind_cfp(ec, cfp);
if (state == TAG_RAISE) {
int handle = FALSE;
VALUE eclass;
va_list ap;
result = Qnil;
/* reuses args when raised again after retrying in r_proc */
va_copy(ap, args);
while ((eclass = va_arg(ap, VALUE)) != 0) {
if (rb_obj_is_kind_of(ec->errinfo, eclass)) {
handle = TRUE;
break;
}
}
va_end(ap);
if (handle) {
state = TAG_NONE;
if (r_proc) {
result = (*r_proc) (data2, ec->errinfo);
}
ec->errinfo = e_info;
}
}
}
EC_POP_TAG();
if (state)
EC_JUMP_TAG(ec, state);
return result;
}
VALUE
rb_rescue(VALUE (* b_proc)(VALUE), VALUE data1,
VALUE (* r_proc)(VALUE, VALUE), VALUE data2)
{
return rb_rescue2(b_proc, data1, r_proc, data2, rb_eStandardError,
(VALUE)0);
}
VALUE
rb_protect(VALUE (* proc) (VALUE), VALUE data, int *pstate)
{
volatile VALUE result = Qnil;
volatile enum ruby_tag_type state;
rb_execution_context_t * volatile ec = GET_EC();
rb_control_frame_t *volatile cfp = ec->cfp;
EC_PUSH_TAG(ec);
if ((state = EC_EXEC_TAG()) == TAG_NONE) {
result = (*proc)(data);
}
else {
rb_vm_rewind_cfp(ec, cfp);
}
EC_POP_TAG();
if (pstate != NULL) *pstate = state;
return result;
}
VALUE
rb_ensure(VALUE (*b_proc)(VALUE), VALUE data1, VALUE (*e_proc)(VALUE), VALUE data2)
{
int state;
volatile VALUE result = Qnil;
VALUE errinfo;
rb_execution_context_t * volatile ec = GET_EC();
rb_ensure_list_t ensure_list;
ensure_list.entry.marker = 0;
ensure_list.entry.e_proc = e_proc;
ensure_list.entry.data2 = data2;
ensure_list.next = ec->ensure_list;
ec->ensure_list = &ensure_list;
EC_PUSH_TAG(ec);
if ((state = EC_EXEC_TAG()) == TAG_NONE) {
result = (*b_proc) (data1);