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
|
/**********************************************************************
vm_trace.c -
$Author: ko1 $
created at: Tue Aug 14 19:37:09 2012
Copyright (C) 1993-2012 Yukihiro Matsumoto
**********************************************************************/
/*
* This file incldue two parts:
*
* (1) set_trace_func internal mechanisms
* and C level API
*
* (2) Ruby level API
* (2-1) set_trace_func API
* (2-2) TracePoint API (not yet)
*
*/
#include "ruby/ruby.h"
#include "ruby/encoding.h"
#include "internal.h"
#include "vm_core.h"
#include "eval_intern.h"
/* (1) trace mechanisms */
typedef enum {
RUBY_HOOK_FLAG_SAFE = 0x01,
RUBY_HOOK_FLAG_DELETED = 0x02,
RUBY_HOOK_FLAG_RAW_ARG = 0x04
} rb_hook_flag_t;
typedef struct rb_event_hook_struct {
rb_hook_flag_t hook_flags;
rb_event_flag_t events;
rb_event_hook_func_t func;
VALUE data;
struct rb_event_hook_struct *next;
} rb_event_hook_t;
typedef struct rb_trace_arg_struct {
rb_event_flag_t event;
rb_thread_t *th;
rb_control_frame_t *cfp;
VALUE self;
ID id;
VALUE klass;
} rb_trace_arg_t;
typedef void (*rb_event_hook_raw_arg_func_t)(VALUE data, const rb_trace_arg_t *arg);
#define MAX_EVENT_NUM 32
static int ruby_event_flag_count[MAX_EVENT_NUM] = {0};
/* Safe API. Callback will be called under PUSH_TAG() */
void rb_add_event_hook(rb_event_hook_func_t func, rb_event_flag_t events, VALUE data);
int rb_remove_event_hook(rb_event_hook_func_t func);
int rb_remove_event_hook_with_data(rb_event_hook_func_t func, VALUE data);
void rb_thread_add_event_hook(VALUE thval, rb_event_hook_func_t func, rb_event_flag_t events, VALUE data);
int rb_thread_remove_event_hook(VALUE thval, rb_event_hook_func_t func);
int rb_thread_remove_event_hook_with_data(VALUE thval, rb_event_hook_func_t func, VALUE data);
/* advanced version */
void rb_add_event_hook2(rb_event_hook_func_t func, rb_event_flag_t events, VALUE data, rb_hook_flag_t hook_flag);
void rb_thread_add_event_hook2(VALUE thval, rb_event_hook_func_t func, rb_event_flag_t events, VALUE data, rb_hook_flag_t hook_flag);
/* called from vm.c */
void
vm_trace_mark_event_hooks(rb_hook_list_t *hooks)
{
rb_event_hook_t *hook = hooks->hooks;
while (hook) {
rb_gc_mark(hook->data);
hook = hook->next;
}
}
/* ruby_vm_event_flags management */
static void
recalc_add_ruby_vm_event_flags(rb_event_flag_t events)
{
int i;
ruby_vm_event_flags = 0;
for (i=0; i<MAX_EVENT_NUM; i++) {
if (events & (1 << i)) {
ruby_event_flag_count[i]++;
}
ruby_vm_event_flags |= ruby_event_flag_count[i] ? (1<<i) : 0;
}
}
static void
recalc_remove_ruby_vm_event_flags(rb_event_flag_t events)
{
int i;
ruby_vm_event_flags = 0;
for (i=0; i<MAX_EVENT_NUM; i++) {
if (events & (1 << i)) {
ruby_event_flag_count[i]--;
}
ruby_vm_event_flags |= ruby_event_flag_count[i] ? (1<<i) : 0;
}
}
/* add/remove hooks */
static rb_thread_t *
thval2thread_t(VALUE thval)
{
rb_thread_t *th;
GetThreadPtr(thval, th);
return th;
}
static rb_event_hook_t *
alloc_event_hook(rb_event_hook_func_t func, rb_event_flag_t events, VALUE data, rb_hook_flag_t hook_flags)
{
rb_event_hook_t *hook = ALLOC(rb_event_hook_t);
hook->hook_flags = hook_flags;
hook->events = events;
hook->func = func;
hook->data = data;
return hook;
}
static void
connect_event_hook(rb_hook_list_t *list, rb_event_hook_t *hook)
{
hook->next = list->hooks;
list->hooks = hook;
recalc_add_ruby_vm_event_flags(hook->events);
list->events |= hook->events;
}
static void
rb_threadptr_add_event_hook(rb_thread_t *th, rb_event_hook_func_t func, rb_event_flag_t events, VALUE data, rb_hook_flag_t hook_flags)
{
rb_event_hook_t *hook = alloc_event_hook(func, events, data, hook_flags);
connect_event_hook(&th->event_hooks, hook);
}
void
rb_thread_add_event_hook(VALUE thval, rb_event_hook_func_t func, rb_event_flag_t events, VALUE data)
{
rb_threadptr_add_event_hook(thval2thread_t(thval), func, events, data, RUBY_HOOK_FLAG_SAFE);
}
void
rb_add_event_hook(rb_event_hook_func_t func, rb_event_flag_t events, VALUE data)
{
rb_event_hook_t *hook = alloc_event_hook(func, events, data, RUBY_HOOK_FLAG_SAFE);
connect_event_hook(&GET_VM()->event_hooks, hook);
}
void
rb_thread_add_event_hook2(VALUE thval, rb_event_hook_func_t func, rb_event_flag_t events, VALUE data, rb_hook_flag_t hook_flags)
{
rb_threadptr_add_event_hook(thval2thread_t(thval), func, events, data, hook_flags);
}
void
rb_add_event_hook2(rb_event_hook_func_t func, rb_event_flag_t events, VALUE data, rb_hook_flag_t hook_flags)
{
rb_event_hook_t *hook = alloc_event_hook(func, events, data, hook_flags);
connect_event_hook(&GET_VM()->event_hooks, hook);
}
/* if func is 0, then clear all funcs */
static int
remove_event_hook(rb_hook_list_t *list, rb_event_hook_func_t func, VALUE data)
{
int ret = 0;
rb_event_hook_t *hook = list->hooks;
while (hook) {
if (func == 0 || hook->func == func) {
if (data == Qundef || hook->data == data) {
hook->hook_flags |= RUBY_HOOK_FLAG_DELETED;
ret+=1;
list->need_clean++;
}
}
hook = hook->next;
}
return ret;
}
static int
rb_threadptr_remove_event_hook(rb_thread_t *th, rb_event_hook_func_t func, VALUE data)
{
return remove_event_hook(&th->event_hooks, func, data);
}
int
rb_thread_remove_event_hook(VALUE thval, rb_event_hook_func_t func)
{
return rb_threadptr_remove_event_hook(thval2thread_t(thval), func, Qundef);
}
int
rb_thread_remove_event_hook_with_data(VALUE thval, rb_event_hook_func_t func, VALUE data)
{
return rb_threadptr_remove_event_hook(thval2thread_t(thval), func, data);
}
int
rb_remove_event_hook(rb_event_hook_func_t func)
{
return remove_event_hook(&GET_VM()->event_hooks, func, Qundef);
}
int
rb_remove_event_hook_with_data(rb_event_hook_func_t func, VALUE data)
{
return remove_event_hook(&GET_VM()->event_hooks, func, data);
}
static int
clear_trace_func_i(st_data_t key, st_data_t val, st_data_t flag)
{
rb_thread_t *th;
GetThreadPtr((VALUE)key, th);
rb_threadptr_remove_event_hook(th, 0, Qundef);
return ST_CONTINUE;
}
void
rb_clear_trace_func(void)
{
st_foreach(GET_VM()->living_threads, clear_trace_func_i, (st_data_t) 0);
rb_remove_event_hook(0);
}
/* invoke hooks */
static void
clean_hooks(rb_hook_list_t *list)
{
rb_event_hook_t *hook, **nextp = &list->hooks;
list->events = 0;
list->need_clean = 0;
while ((hook = *nextp) != 0) {
if (hook->hook_flags & RUBY_HOOK_FLAG_DELETED) {
*nextp = hook->next;
recalc_remove_ruby_vm_event_flags(hook->events);
xfree(hook);
}
else {
list->events |= hook->events; /* update active events */
nextp = &hook->next;
}
}
}
static int
exec_hooks(rb_thread_t *th, rb_hook_list_t *list, const rb_trace_arg_t *trace_arg, int can_clean_hooks)
{
int state;
volatile int raised;
if (UNLIKELY(list->need_clean > 0) && can_clean_hooks) {
clean_hooks(list);
}
raised = rb_threadptr_reset_raised(th);
/* TODO: Support !RUBY_HOOK_FLAG_SAFE hooks */
TH_PUSH_TAG(th);
if ((state = TH_EXEC_TAG()) == 0) {
rb_event_hook_t *hook;
for (hook = list->hooks; hook; hook = hook->next) {
if (LIKELY(!(hook->hook_flags & RUBY_HOOK_FLAG_DELETED)) && (trace_arg->event & hook->events)) {
if (!(hook->hook_flags & RUBY_HOOK_FLAG_RAW_ARG)) {
(*hook->func)(trace_arg->event, hook->data, trace_arg->self, trace_arg->id, trace_arg->klass);
}
else {
(*((rb_event_hook_raw_arg_func_t)hook->func))(hook->data, trace_arg);
}
}
}
}
TH_POP_TAG();
if (raised) {
rb_threadptr_set_raised(th);
}
return state;
}
void
rb_threadptr_exec_event_hooks(rb_thread_t *th, rb_event_flag_t event, VALUE self, ID id, VALUE klass)
{
if (th->trace_running == 0 &&
self != rb_mRubyVMFrozenCore /* skip special methods. TODO: remove it. */) {
int vm_tracing = th->vm->trace_running;
int state = 0;
int outer_state = th->state;
th->state = 0;
th->vm->trace_running = 1;
th->trace_running = 1;
{
const VALUE errinfo = th->errinfo;
rb_hook_list_t *list;
rb_trace_arg_t ta;
ta.event = event;
ta.th = th;
ta.cfp = th->cfp;
ta.self = self;
ta.id = id;
ta.klass = klass;
/* thread local traces */
list = &th->event_hooks;
if (list->events & event) {
state = exec_hooks(th, list, &ta, TRUE);
if (state) goto terminate;
}
/* vm global traces */
list = &th->vm->event_hooks;
if (list->events & event) {
state = exec_hooks(th, list, &ta, !vm_tracing);
if (state) goto terminate;
}
th->errinfo = errinfo;
}
terminate:
th->trace_running = 0;
th->vm->trace_running = vm_tracing;
if (state) {
TH_JUMP_TAG(th, state);
}
th->state = outer_state;
}
}
VALUE
rb_suppress_tracing(VALUE (*func)(VALUE), VALUE arg)
{
volatile int raised;
volatile int outer_state;
VALUE result = Qnil;
rb_thread_t *th = GET_THREAD();
int state;
int vm_tracing = th->vm->trace_running;
int tracing = th->trace_running;
th->vm->trace_running = 1;
th->trace_running = 1;
raised = rb_threadptr_reset_raised(th);
outer_state = th->state;
th->state = 0;
PUSH_TAG();
if ((state = EXEC_TAG()) == 0) {
result = (*func)(arg);
}
POP_TAG();
if (raised) {
rb_threadptr_set_raised(th);
}
th->trace_running = tracing;
th->vm->trace_running = vm_tracing;
if (state) {
JUMP_TAG(state);
}
th->state = outer_state;
return result;
}
static void call_trace_func(rb_event_flag_t, VALUE data, VALUE self, ID id, VALUE klass);
/* (2-1) set_trace_func (old API) */
/*
* call-seq:
* set_trace_func(proc) -> proc
* set_trace_func(nil) -> nil
*
* Establishes _proc_ as the handler for tracing, or disables
* tracing if the parameter is +nil+. _proc_ takes up
* to six parameters: an event name, a filename, a line number, an
* object id, a binding, and the name of a class. _proc_ is
* invoked whenever an event occurs. Events are: <code>c-call</code>
* (call a C-language routine), <code>c-return</code> (return from a
* C-language routine), <code>call</code> (call a Ruby method),
* <code>class</code> (start a class or module definition),
* <code>end</code> (finish a class or module definition),
* <code>line</code> (execute code on a new line), <code>raise</code>
* (raise an exception), and <code>return</code> (return from a Ruby
* method). Tracing is disabled within the context of _proc_.
*
* class Test
* def test
* a = 1
* b = 2
* end
* end
*
* set_trace_func proc { |event, file, line, id, binding, classname|
* printf "%8s %s:%-2d %10s %8s\n", event, file, line, id, classname
* }
* t = Test.new
* t.test
*
* line prog.rb:11 false
* c-call prog.rb:11 new Class
* c-call prog.rb:11 initialize Object
* c-return prog.rb:11 initialize Object
* c-return prog.rb:11 new Class
* line prog.rb:12 false
* call prog.rb:2 test Test
* line prog.rb:3 test Test
* line prog.rb:4 test Test
* return prog.rb:4 test Test
*/
static VALUE
set_trace_func(VALUE obj, VALUE trace)
{
rb_remove_event_hook(call_trace_func);
if (NIL_P(trace)) {
return Qnil;
}
if (!rb_obj_is_proc(trace)) {
rb_raise(rb_eTypeError, "trace_func needs to be Proc");
}
rb_add_event_hook(call_trace_func, RUBY_EVENT_ALL, trace);
return trace;
}
static void
thread_add_trace_func(rb_thread_t *th, VALUE trace)
{
if (!rb_obj_is_proc(trace)) {
rb_raise(rb_eTypeError, "trace_func needs to be Proc");
}
rb_threadptr_add_event_hook(th, call_trace_func, RUBY_EVENT_ALL, trace, RUBY_HOOK_FLAG_SAFE);
}
/*
* call-seq:
* thr.add_trace_func(proc) -> proc
*
* Adds _proc_ as a handler for tracing.
* See <code>Thread#set_trace_func</code> and +set_trace_func+.
*/
static VALUE
thread_add_trace_func_m(VALUE obj, VALUE trace)
{
rb_thread_t *th;
GetThreadPtr(obj, th);
thread_add_trace_func(th, trace);
return trace;
}
/*
* call-seq:
* thr.set_trace_func(proc) -> proc
* thr.set_trace_func(nil) -> nil
*
* Establishes _proc_ on _thr_ as the handler for tracing, or
* disables tracing if the parameter is +nil+.
* See +set_trace_func+.
*/
static VALUE
thread_set_trace_func_m(VALUE obj, VALUE trace)
{
rb_thread_t *th;
GetThreadPtr(obj, th);
rb_threadptr_remove_event_hook(th, call_trace_func, Qundef);
if (NIL_P(trace)) {
return Qnil;
}
thread_add_trace_func(th, trace);
return trace;
}
static const char *
get_event_name(rb_event_flag_t event)
{
switch (event) {
case RUBY_EVENT_LINE: return "line";
case RUBY_EVENT_CLASS: return "class";
case RUBY_EVENT_END: return "end";
case RUBY_EVENT_CALL: return "call";
case RUBY_EVENT_RETURN: return "return";
case RUBY_EVENT_C_CALL: return "c-call";
case RUBY_EVENT_C_RETURN: return "c-return";
case RUBY_EVENT_RAISE: return "raise";
default:
return "unknown";
}
}
static ID
get_event_id(rb_event_flag_t event)
{
ID id;
switch (event) {
#define C(name, NAME) case RUBY_EVENT_##NAME: CONST_ID(id, #name); return id;
C(line, LINE);
C(class, CLASS);
C(end, END);
C(call, CALL);
C(return, RETURN);
C(c_call, C_CALL);
C(c_return, C_RETURN);
C(raise, RAISE);
#undef C
default:
return 0;
}
}
static void
call_trace_func(rb_event_flag_t event, VALUE proc, VALUE self, ID id, VALUE klass)
{
const char *srcfile = rb_sourcefile();
VALUE eventname = rb_str_new2(get_event_name(event));
VALUE filename = srcfile ? rb_str_new2(srcfile) : Qnil;
VALUE argv[6];
int line = rb_sourceline();
rb_thread_t *th = GET_THREAD();
if (!klass) {
rb_thread_method_id_and_class(th, &id, &klass);
}
if (klass) {
if (RB_TYPE_P(klass, T_ICLASS)) {
klass = RBASIC(klass)->klass;
}
else if (FL_TEST(klass, FL_SINGLETON)) {
klass = rb_iv_get(klass, "__attached__");
}
}
argv[0] = eventname;
argv[1] = filename;
argv[2] = INT2FIX(line);
argv[3] = id ? ID2SYM(id) : Qnil;
argv[4] = (self && srcfile) ? rb_binding_new() : Qnil;
argv[5] = klass ? klass : Qnil;
rb_proc_call_with_block(proc, 6, argv, Qnil);
}
/* (2-2) TracePoint API */
static VALUE rb_cTracePoint;
typedef struct rb_tp_struct {
rb_event_flag_t events;
rb_thread_t *target_th;
VALUE proc;
rb_trace_arg_t *trace_arg;
int tracing;
} rb_tp_t;
static void
tp_mark(void *ptr)
{
if (ptr) {
rb_tp_t *tp = (rb_tp_t *)ptr;
rb_gc_mark(tp->proc);
if (tp->target_th) rb_gc_mark(tp->target_th->self);
}
}
static void
tp_free(void *ptr)
{
/* do nothing */
}
static size_t
tp_memsize(const void *ptr)
{
return sizeof(rb_tp_t);
}
static const rb_data_type_t tp_data_type = {
"tracepoint",
{tp_mark, tp_free, tp_memsize,},
};
static VALUE
tp_alloc(VALUE klass)
{
rb_tp_t *tp;
return TypedData_Make_Struct(klass, rb_tp_t, &tp_data_type, tp);
}
static rb_event_flag_t
symbol2event_flag(VALUE v)
{
static ID id;
VALUE sym = rb_convert_type(v, T_SYMBOL, "Symbol", "to_sym");
#define C(name, NAME) CONST_ID(id, #name); if (sym == ID2SYM(id)) return RUBY_EVENT_##NAME
C(line, LINE);
C(class, CLASS);
C(end, END);
C(call, CALL);
C(return, RETURN);
C(c_call, C_CALL);
C(c_return, C_RETURN);
C(raise, RAISE);
#undef C
rb_raise(rb_eArgError, "unknown event: %s", rb_id2name(SYM2ID(sym)));
}
static rb_tp_t *
tpptr(VALUE tpval)
{
rb_tp_t *tp;
TypedData_Get_Struct(tpval, rb_tp_t, &tp_data_type, tp);
return tp;
}
static void
tp_attr_check_active(rb_tp_t *tp)
{
if (tp->trace_arg == 0) {
rb_raise(rb_eRuntimeError, "access from outside");
}
}
static VALUE
tp_attr_event_m(VALUE tpval)
{
rb_tp_t *tp = tpptr(tpval);
tp_attr_check_active(tp);
return ID2SYM(get_event_id(tp->trace_arg->event));
}
rb_control_frame_t *rb_vm_get_ruby_level_next_cfp(rb_thread_t *th, rb_control_frame_t *cfp);
int rb_vm_control_frame_id_and_class(rb_control_frame_t *cfp, ID *idp, VALUE *klassp);
VALUE rb_binding_new_with_cfp(rb_thread_t *th, rb_control_frame_t *src_cfp);
static VALUE
tp_attr_line_m(VALUE tpval)
{
rb_tp_t *tp = tpptr(tpval);
rb_control_frame_t *cfp;
tp_attr_check_active(tp);
cfp = rb_vm_get_ruby_level_next_cfp(tp->trace_arg->th, tp->trace_arg->cfp);
if (cfp) {
return INT2FIX(rb_vm_get_sourceline(cfp));
}
else {
return INT2FIX(0);
}
}
static VALUE
tp_attr_file_m(VALUE tpval)
{
rb_tp_t *tp = tpptr(tpval);
rb_control_frame_t *cfp;
tp_attr_check_active(tp);
cfp = rb_vm_get_ruby_level_next_cfp(tp->trace_arg->th, tp->trace_arg->cfp);
if (cfp) {
return cfp->iseq->location.path;
}
else {
return Qnil;
}
}
static void
fill_id_and_klass(rb_trace_arg_t *trace_arg)
{
if (!trace_arg->klass)
rb_vm_control_frame_id_and_class(trace_arg->cfp, &trace_arg->id, &trace_arg->klass);
if (trace_arg->klass) {
if (RB_TYPE_P(trace_arg->klass, T_ICLASS)) {
trace_arg->klass = RBASIC(trace_arg->klass)->klass;
}
else if (FL_TEST(trace_arg->klass, FL_SINGLETON)) {
trace_arg->klass = rb_iv_get(trace_arg->klass, "__attached__");
}
}
}
static VALUE
tp_attr_id_m(VALUE tpval)
{
rb_tp_t *tp = tpptr(tpval);
tp_attr_check_active(tp);
fill_id_and_klass(tp->trace_arg);
if (tp->trace_arg->id) {
return ID2SYM(tp->trace_arg->id);
}
else {
return Qnil;
}
}
static VALUE
tp_attr_klass_m(VALUE tpval)
{
rb_tp_t *tp = tpptr(tpval);
tp_attr_check_active(tp);
fill_id_and_klass(tp->trace_arg);
if (tp->trace_arg->klass) {
return tp->trace_arg->klass;
}
else {
return Qnil;
}
}
static VALUE
tp_attr_binding_m(VALUE tpval)
{
rb_tp_t *tp = tpptr(tpval);
rb_control_frame_t *cfp;
tp_attr_check_active(tp);
cfp = rb_vm_get_ruby_level_next_cfp(tp->trace_arg->th, tp->trace_arg->cfp);
if (cfp) {
return rb_binding_new_with_cfp(tp->trace_arg->th, cfp);
}
else {
return Qnil;
}
}
static VALUE
tp_attr_self_m(VALUE tpval)
{
rb_tp_t *tp = tpptr(tpval);
tp_attr_check_active(tp);
return tp->trace_arg->self;
}
static void
tp_call_trace(VALUE tpval, rb_trace_arg_t *trace_arg)
{
rb_tp_t *tp = tpptr(tpval);
rb_thread_t *th = GET_THREAD();
int state;
tp->trace_arg = trace_arg;
TH_PUSH_TAG(th);
if ((state = TH_EXEC_TAG()) == 0) {
rb_proc_call_with_block(tp->proc, 1, &tpval, Qnil);
}
TH_POP_TAG();
tp->trace_arg = 0;
if (state) {
TH_JUMP_TAG(th, state);
}
}
static VALUE
tp_set_trace(VALUE tpval)
{
rb_tp_t *tp = tpptr(tpval);
if (tp->tracing) {
/* already tracing */
/* TODO: raise error? */
}
else {
if (tp->target_th) {
rb_thread_add_event_hook2(tp->target_th->self, (rb_event_hook_func_t)tp_call_trace, tp->events, tpval, RUBY_HOOK_FLAG_SAFE | RUBY_HOOK_FLAG_RAW_ARG);
}
else {
rb_add_event_hook2((rb_event_hook_func_t)tp_call_trace, tp->events, tpval, RUBY_HOOK_FLAG_SAFE | RUBY_HOOK_FLAG_RAW_ARG);
}
tp->tracing = 1;
}
return tpval;
}
static VALUE
tp_unset_trace(VALUE tpval)
{
rb_tp_t *tp = tpptr(tpval);
if (!tp->tracing) {
/* not tracing */
/* TODO: raise error? */
}
else {
if (tp->target_th) {
rb_thread_remove_event_hook_with_data(tp->target_th->self, (rb_event_hook_func_t)tp_call_trace, tpval);
}
else {
rb_remove_event_hook_with_data((rb_event_hook_func_t)tp_call_trace, tpval);
}
tp->tracing = 0;
}
return tpval;
}
static VALUE
tp_initialize(rb_thread_t *target_th, rb_event_flag_t events, VALUE proc)
{
VALUE tpval = tp_alloc(rb_cTracePoint);
rb_tp_t *tp;
TypedData_Get_Struct(tpval, rb_tp_t, &tp_data_type, tp);
tp->proc = proc;
tp->events = events;
tp_set_trace(tpval);
return tpval;
}
static VALUE
tp_trace_s(int argc, VALUE *argv)
{
rb_event_flag_t events = 0;
int i;
if (argc > 0) {
for (i=0; i<argc; i++) {
events |= symbol2event_flag(argv[i]);
}
}
else {
events = RUBY_EVENT_ALL;
}
if (!rb_block_given_p()) {
rb_raise(rb_eThreadError, "must be called with a block");
}
return tp_initialize(0, events, rb_block_proc());
}
/* This function is called from inits.c */
void
Init_vm_trace(void)
{
/* trace_func */
rb_define_global_function("set_trace_func", set_trace_func, 1);
rb_define_method(rb_cThread, "set_trace_func", thread_set_trace_func_m, 1);
rb_define_method(rb_cThread, "add_trace_func", thread_add_trace_func_m, 1);
/* TracePoint */
rb_cTracePoint = rb_define_class("TracePoint", rb_cObject);
rb_undef_alloc_func(rb_cTracePoint);
rb_undef_method(CLASS_OF(rb_cTracePoint), "new");
rb_define_singleton_method(rb_cTracePoint, "trace", tp_trace_s, -1);
rb_define_method(rb_cTracePoint, "retrace", tp_set_trace, 0);
rb_define_method(rb_cTracePoint, "untrace", tp_unset_trace, 0);
rb_define_method(rb_cTracePoint, "event", tp_attr_event_m, 0);
rb_define_method(rb_cTracePoint, "line", tp_attr_line_m, 0);
rb_define_method(rb_cTracePoint, "file", tp_attr_file_m, 0);
rb_define_method(rb_cTracePoint, "id", tp_attr_id_m, 0);
rb_define_method(rb_cTracePoint, "klass", tp_attr_klass_m, 0);
rb_define_method(rb_cTracePoint, "binding", tp_attr_binding_m, 0);
rb_define_method(rb_cTracePoint, "self", tp_attr_self_m, 0);
}
|