1 /*
2 * trace-event-perl. Feed perf script events to an embedded Perl interpreter.
3 *
4 * Copyright (C) 2009 Tom Zanussi <tzanussi@gmail.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22 #include <inttypes.h>
23 #include <stdio.h>
24 #include <stdlib.h>
25 #include <string.h>
26 #include <ctype.h>
27 #include <errno.h>
28 #include <linux/bitmap.h>
29 #include <linux/time64.h>
30 #include <traceevent/event-parse.h>
31
32 #include <stdbool.h>
33 /* perl needs the following define, right after including stdbool.h */
34 #define HAS_BOOL
35 #include <EXTERN.h>
36 #include <perl.h>
37
38 #include "../callchain.h"
39 #include "../dso.h"
40 #include "../machine.h"
41 #include "../map.h"
42 #include "../symbol.h"
43 #include "../thread.h"
44 #include "../event.h"
45 #include "../trace-event.h"
46 #include "../evsel.h"
47 #include "../debug.h"
48
49 void boot_Perf__Trace__Context(pTHX_ CV *cv);
50 void boot_DynaLoader(pTHX_ CV *cv);
51 typedef PerlInterpreter * INTERP;
52
53 void xs_init(pTHX);
54
xs_init(pTHX)55 void xs_init(pTHX)
56 {
57 const char *file = __FILE__;
58 dXSUB_SYS;
59
60 newXS("Perf::Trace::Context::bootstrap", boot_Perf__Trace__Context,
61 file);
62 newXS("DynaLoader::boot_DynaLoader", boot_DynaLoader, file);
63 }
64
65 INTERP my_perl;
66
67 #define TRACE_EVENT_TYPE_MAX \
68 ((1 << (sizeof(unsigned short) * 8)) - 1)
69
70 static DECLARE_BITMAP(events_defined, TRACE_EVENT_TYPE_MAX);
71
72 extern struct scripting_context *scripting_context;
73
74 static char *cur_field_name;
75 static int zero_flag_atom;
76
define_symbolic_value(const char * ev_name,const char * field_name,const char * field_value,const char * field_str)77 static void define_symbolic_value(const char *ev_name,
78 const char *field_name,
79 const char *field_value,
80 const char *field_str)
81 {
82 unsigned long long value;
83 dSP;
84
85 value = eval_flag(field_value);
86
87 ENTER;
88 SAVETMPS;
89 PUSHMARK(SP);
90
91 XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
92 XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
93 XPUSHs(sv_2mortal(newSVuv(value)));
94 XPUSHs(sv_2mortal(newSVpv(field_str, 0)));
95
96 PUTBACK;
97 if (get_cv("main::define_symbolic_value", 0))
98 call_pv("main::define_symbolic_value", G_SCALAR);
99 SPAGAIN;
100 PUTBACK;
101 FREETMPS;
102 LEAVE;
103 }
104
define_symbolic_values(struct tep_print_flag_sym * field,const char * ev_name,const char * field_name)105 static void define_symbolic_values(struct tep_print_flag_sym *field,
106 const char *ev_name,
107 const char *field_name)
108 {
109 define_symbolic_value(ev_name, field_name, field->value, field->str);
110 if (field->next)
111 define_symbolic_values(field->next, ev_name, field_name);
112 }
113
define_symbolic_field(const char * ev_name,const char * field_name)114 static void define_symbolic_field(const char *ev_name,
115 const char *field_name)
116 {
117 dSP;
118
119 ENTER;
120 SAVETMPS;
121 PUSHMARK(SP);
122
123 XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
124 XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
125
126 PUTBACK;
127 if (get_cv("main::define_symbolic_field", 0))
128 call_pv("main::define_symbolic_field", G_SCALAR);
129 SPAGAIN;
130 PUTBACK;
131 FREETMPS;
132 LEAVE;
133 }
134
define_flag_value(const char * ev_name,const char * field_name,const char * field_value,const char * field_str)135 static void define_flag_value(const char *ev_name,
136 const char *field_name,
137 const char *field_value,
138 const char *field_str)
139 {
140 unsigned long long value;
141 dSP;
142
143 value = eval_flag(field_value);
144
145 ENTER;
146 SAVETMPS;
147 PUSHMARK(SP);
148
149 XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
150 XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
151 XPUSHs(sv_2mortal(newSVuv(value)));
152 XPUSHs(sv_2mortal(newSVpv(field_str, 0)));
153
154 PUTBACK;
155 if (get_cv("main::define_flag_value", 0))
156 call_pv("main::define_flag_value", G_SCALAR);
157 SPAGAIN;
158 PUTBACK;
159 FREETMPS;
160 LEAVE;
161 }
162
define_flag_values(struct tep_print_flag_sym * field,const char * ev_name,const char * field_name)163 static void define_flag_values(struct tep_print_flag_sym *field,
164 const char *ev_name,
165 const char *field_name)
166 {
167 define_flag_value(ev_name, field_name, field->value, field->str);
168 if (field->next)
169 define_flag_values(field->next, ev_name, field_name);
170 }
171
define_flag_field(const char * ev_name,const char * field_name,const char * delim)172 static void define_flag_field(const char *ev_name,
173 const char *field_name,
174 const char *delim)
175 {
176 dSP;
177
178 ENTER;
179 SAVETMPS;
180 PUSHMARK(SP);
181
182 XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
183 XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
184 XPUSHs(sv_2mortal(newSVpv(delim, 0)));
185
186 PUTBACK;
187 if (get_cv("main::define_flag_field", 0))
188 call_pv("main::define_flag_field", G_SCALAR);
189 SPAGAIN;
190 PUTBACK;
191 FREETMPS;
192 LEAVE;
193 }
194
define_event_symbols(struct tep_event * event,const char * ev_name,struct tep_print_arg * args)195 static void define_event_symbols(struct tep_event *event,
196 const char *ev_name,
197 struct tep_print_arg *args)
198 {
199 if (args == NULL)
200 return;
201
202 switch (args->type) {
203 case TEP_PRINT_NULL:
204 break;
205 case TEP_PRINT_ATOM:
206 define_flag_value(ev_name, cur_field_name, "0",
207 args->atom.atom);
208 zero_flag_atom = 0;
209 break;
210 case TEP_PRINT_FIELD:
211 free(cur_field_name);
212 cur_field_name = strdup(args->field.name);
213 break;
214 case TEP_PRINT_FLAGS:
215 define_event_symbols(event, ev_name, args->flags.field);
216 define_flag_field(ev_name, cur_field_name, args->flags.delim);
217 define_flag_values(args->flags.flags, ev_name, cur_field_name);
218 break;
219 case TEP_PRINT_SYMBOL:
220 define_event_symbols(event, ev_name, args->symbol.field);
221 define_symbolic_field(ev_name, cur_field_name);
222 define_symbolic_values(args->symbol.symbols, ev_name,
223 cur_field_name);
224 break;
225 case TEP_PRINT_HEX:
226 case TEP_PRINT_HEX_STR:
227 define_event_symbols(event, ev_name, args->hex.field);
228 define_event_symbols(event, ev_name, args->hex.size);
229 break;
230 case TEP_PRINT_INT_ARRAY:
231 define_event_symbols(event, ev_name, args->int_array.field);
232 define_event_symbols(event, ev_name, args->int_array.count);
233 define_event_symbols(event, ev_name, args->int_array.el_size);
234 break;
235 case TEP_PRINT_BSTRING:
236 case TEP_PRINT_DYNAMIC_ARRAY:
237 case TEP_PRINT_DYNAMIC_ARRAY_LEN:
238 case TEP_PRINT_STRING:
239 case TEP_PRINT_BITMASK:
240 break;
241 case TEP_PRINT_TYPE:
242 define_event_symbols(event, ev_name, args->typecast.item);
243 break;
244 case TEP_PRINT_OP:
245 if (strcmp(args->op.op, ":") == 0)
246 zero_flag_atom = 1;
247 define_event_symbols(event, ev_name, args->op.left);
248 define_event_symbols(event, ev_name, args->op.right);
249 break;
250 case TEP_PRINT_FUNC:
251 default:
252 pr_err("Unsupported print arg type\n");
253 /* we should warn... */
254 return;
255 }
256
257 if (args->next)
258 define_event_symbols(event, ev_name, args->next);
259 }
260
perl_process_callchain(struct perf_sample * sample,struct evsel * evsel,struct addr_location * al)261 static SV *perl_process_callchain(struct perf_sample *sample,
262 struct evsel *evsel,
263 struct addr_location *al)
264 {
265 AV *list;
266
267 list = newAV();
268 if (!list)
269 goto exit;
270
271 if (!symbol_conf.use_callchain || !sample->callchain)
272 goto exit;
273
274 if (thread__resolve_callchain(al->thread, &callchain_cursor, evsel,
275 sample, NULL, NULL, scripting_max_stack) != 0) {
276 pr_err("Failed to resolve callchain. Skipping\n");
277 goto exit;
278 }
279 callchain_cursor_commit(&callchain_cursor);
280
281
282 while (1) {
283 HV *elem;
284 struct callchain_cursor_node *node;
285 node = callchain_cursor_current(&callchain_cursor);
286 if (!node)
287 break;
288
289 elem = newHV();
290 if (!elem)
291 goto exit;
292
293 if (!hv_stores(elem, "ip", newSVuv(node->ip))) {
294 hv_undef(elem);
295 goto exit;
296 }
297
298 if (node->ms.sym) {
299 HV *sym = newHV();
300 if (!sym) {
301 hv_undef(elem);
302 goto exit;
303 }
304 if (!hv_stores(sym, "start", newSVuv(node->ms.sym->start)) ||
305 !hv_stores(sym, "end", newSVuv(node->ms.sym->end)) ||
306 !hv_stores(sym, "binding", newSVuv(node->ms.sym->binding)) ||
307 !hv_stores(sym, "name", newSVpvn(node->ms.sym->name,
308 node->ms.sym->namelen)) ||
309 !hv_stores(elem, "sym", newRV_noinc((SV*)sym))) {
310 hv_undef(sym);
311 hv_undef(elem);
312 goto exit;
313 }
314 }
315
316 if (node->ms.map) {
317 struct map *map = node->ms.map;
318 const char *dsoname = "[unknown]";
319 if (map && map->dso) {
320 if (symbol_conf.show_kernel_path && map->dso->long_name)
321 dsoname = map->dso->long_name;
322 else
323 dsoname = map->dso->name;
324 }
325 if (!hv_stores(elem, "dso", newSVpv(dsoname,0))) {
326 hv_undef(elem);
327 goto exit;
328 }
329 }
330
331 callchain_cursor_advance(&callchain_cursor);
332 av_push(list, newRV_noinc((SV*)elem));
333 }
334
335 exit:
336 return newRV_noinc((SV*)list);
337 }
338
perl_process_tracepoint(struct perf_sample * sample,struct evsel * evsel,struct addr_location * al)339 static void perl_process_tracepoint(struct perf_sample *sample,
340 struct evsel *evsel,
341 struct addr_location *al)
342 {
343 struct thread *thread = al->thread;
344 struct tep_event *event = evsel->tp_format;
345 struct tep_format_field *field;
346 static char handler[256];
347 unsigned long long val;
348 unsigned long s, ns;
349 int pid;
350 int cpu = sample->cpu;
351 void *data = sample->raw_data;
352 unsigned long long nsecs = sample->time;
353 const char *comm = thread__comm_str(thread);
354
355 dSP;
356
357 if (evsel->core.attr.type != PERF_TYPE_TRACEPOINT)
358 return;
359
360 if (!event) {
361 pr_debug("ug! no event found for type %" PRIu64, (u64)evsel->core.attr.config);
362 return;
363 }
364
365 pid = raw_field_value(event, "common_pid", data);
366
367 sprintf(handler, "%s::%s", event->system, event->name);
368
369 if (!__test_and_set_bit(event->id, events_defined))
370 define_event_symbols(event, handler, event->print_fmt.args);
371
372 s = nsecs / NSEC_PER_SEC;
373 ns = nsecs - s * NSEC_PER_SEC;
374
375 ENTER;
376 SAVETMPS;
377 PUSHMARK(SP);
378
379 XPUSHs(sv_2mortal(newSVpv(handler, 0)));
380 XPUSHs(sv_2mortal(newSViv(PTR2IV(scripting_context))));
381 XPUSHs(sv_2mortal(newSVuv(cpu)));
382 XPUSHs(sv_2mortal(newSVuv(s)));
383 XPUSHs(sv_2mortal(newSVuv(ns)));
384 XPUSHs(sv_2mortal(newSViv(pid)));
385 XPUSHs(sv_2mortal(newSVpv(comm, 0)));
386 XPUSHs(sv_2mortal(perl_process_callchain(sample, evsel, al)));
387
388 /* common fields other than pid can be accessed via xsub fns */
389
390 for (field = event->format.fields; field; field = field->next) {
391 if (field->flags & TEP_FIELD_IS_STRING) {
392 int offset;
393 if (field->flags & TEP_FIELD_IS_DYNAMIC) {
394 offset = *(int *)(data + field->offset);
395 offset &= 0xffff;
396 if (tep_field_is_relative(field->flags))
397 offset += field->offset + field->size;
398 } else
399 offset = field->offset;
400 XPUSHs(sv_2mortal(newSVpv((char *)data + offset, 0)));
401 } else { /* FIELD_IS_NUMERIC */
402 val = read_size(event, data + field->offset,
403 field->size);
404 if (field->flags & TEP_FIELD_IS_SIGNED) {
405 XPUSHs(sv_2mortal(newSViv(val)));
406 } else {
407 XPUSHs(sv_2mortal(newSVuv(val)));
408 }
409 }
410 }
411
412 PUTBACK;
413
414 if (get_cv(handler, 0))
415 call_pv(handler, G_SCALAR);
416 else if (get_cv("main::trace_unhandled", 0)) {
417 XPUSHs(sv_2mortal(newSVpv(handler, 0)));
418 XPUSHs(sv_2mortal(newSViv(PTR2IV(scripting_context))));
419 XPUSHs(sv_2mortal(newSVuv(cpu)));
420 XPUSHs(sv_2mortal(newSVuv(nsecs)));
421 XPUSHs(sv_2mortal(newSViv(pid)));
422 XPUSHs(sv_2mortal(newSVpv(comm, 0)));
423 XPUSHs(sv_2mortal(perl_process_callchain(sample, evsel, al)));
424 call_pv("main::trace_unhandled", G_SCALAR);
425 }
426 SPAGAIN;
427 PUTBACK;
428 FREETMPS;
429 LEAVE;
430 }
431
perl_process_event_generic(union perf_event * event,struct perf_sample * sample,struct evsel * evsel)432 static void perl_process_event_generic(union perf_event *event,
433 struct perf_sample *sample,
434 struct evsel *evsel)
435 {
436 dSP;
437
438 if (!get_cv("process_event", 0))
439 return;
440
441 ENTER;
442 SAVETMPS;
443 PUSHMARK(SP);
444 XPUSHs(sv_2mortal(newSVpvn((const char *)event, event->header.size)));
445 XPUSHs(sv_2mortal(newSVpvn((const char *)&evsel->core.attr, sizeof(evsel->core.attr))));
446 XPUSHs(sv_2mortal(newSVpvn((const char *)sample, sizeof(*sample))));
447 XPUSHs(sv_2mortal(newSVpvn((const char *)sample->raw_data, sample->raw_size)));
448 PUTBACK;
449 call_pv("process_event", G_SCALAR);
450 SPAGAIN;
451 PUTBACK;
452 FREETMPS;
453 LEAVE;
454 }
455
perl_process_event(union perf_event * event,struct perf_sample * sample,struct evsel * evsel,struct addr_location * al,struct addr_location * addr_al)456 static void perl_process_event(union perf_event *event,
457 struct perf_sample *sample,
458 struct evsel *evsel,
459 struct addr_location *al,
460 struct addr_location *addr_al)
461 {
462 scripting_context__update(scripting_context, event, sample, evsel, al, addr_al);
463 perl_process_tracepoint(sample, evsel, al);
464 perl_process_event_generic(event, sample, evsel);
465 }
466
run_start_sub(void)467 static void run_start_sub(void)
468 {
469 dSP; /* access to Perl stack */
470 PUSHMARK(SP);
471
472 if (get_cv("main::trace_begin", 0))
473 call_pv("main::trace_begin", G_DISCARD | G_NOARGS);
474 }
475
476 /*
477 * Start trace script
478 */
perl_start_script(const char * script,int argc,const char ** argv,struct perf_session * session)479 static int perl_start_script(const char *script, int argc, const char **argv,
480 struct perf_session *session)
481 {
482 const char **command_line;
483 int i, err = 0;
484
485 scripting_context->session = session;
486
487 command_line = malloc((argc + 2) * sizeof(const char *));
488 command_line[0] = "";
489 command_line[1] = script;
490 for (i = 2; i < argc + 2; i++)
491 command_line[i] = argv[i - 2];
492
493 my_perl = perl_alloc();
494 perl_construct(my_perl);
495
496 if (perl_parse(my_perl, xs_init, argc + 2, (char **)command_line,
497 (char **)NULL)) {
498 err = -1;
499 goto error;
500 }
501
502 if (perl_run(my_perl)) {
503 err = -1;
504 goto error;
505 }
506
507 if (SvTRUE(ERRSV)) {
508 err = -1;
509 goto error;
510 }
511
512 run_start_sub();
513
514 free(command_line);
515 return 0;
516 error:
517 perl_free(my_perl);
518 free(command_line);
519
520 return err;
521 }
522
perl_flush_script(void)523 static int perl_flush_script(void)
524 {
525 return 0;
526 }
527
528 /*
529 * Stop trace script
530 */
perl_stop_script(void)531 static int perl_stop_script(void)
532 {
533 dSP; /* access to Perl stack */
534 PUSHMARK(SP);
535
536 if (get_cv("main::trace_end", 0))
537 call_pv("main::trace_end", G_DISCARD | G_NOARGS);
538
539 perl_destruct(my_perl);
540 perl_free(my_perl);
541
542 return 0;
543 }
544
perl_generate_script(struct tep_handle * pevent,const char * outfile)545 static int perl_generate_script(struct tep_handle *pevent, const char *outfile)
546 {
547 int i, not_first, count, nr_events;
548 struct tep_event **all_events;
549 struct tep_event *event = NULL;
550 struct tep_format_field *f;
551 char fname[PATH_MAX];
552 FILE *ofp;
553
554 sprintf(fname, "%s.pl", outfile);
555 ofp = fopen(fname, "w");
556 if (ofp == NULL) {
557 fprintf(stderr, "couldn't open %s\n", fname);
558 return -1;
559 }
560
561 fprintf(ofp, "# perf script event handlers, "
562 "generated by perf script -g perl\n");
563
564 fprintf(ofp, "# Licensed under the terms of the GNU GPL"
565 " License version 2\n\n");
566
567 fprintf(ofp, "# The common_* event handler fields are the most useful "
568 "fields common to\n");
569
570 fprintf(ofp, "# all events. They don't necessarily correspond to "
571 "the 'common_*' fields\n");
572
573 fprintf(ofp, "# in the format files. Those fields not available as "
574 "handler params can\n");
575
576 fprintf(ofp, "# be retrieved using Perl functions of the form "
577 "common_*($context).\n");
578
579 fprintf(ofp, "# See Context.pm for the list of available "
580 "functions.\n\n");
581
582 fprintf(ofp, "use lib \"$ENV{'PERF_EXEC_PATH'}/scripts/perl/"
583 "Perf-Trace-Util/lib\";\n");
584
585 fprintf(ofp, "use lib \"./Perf-Trace-Util/lib\";\n");
586 fprintf(ofp, "use Perf::Trace::Core;\n");
587 fprintf(ofp, "use Perf::Trace::Context;\n");
588 fprintf(ofp, "use Perf::Trace::Util;\n\n");
589
590 fprintf(ofp, "sub trace_begin\n{\n\t# optional\n}\n\n");
591 fprintf(ofp, "sub trace_end\n{\n\t# optional\n}\n");
592
593
594 fprintf(ofp, "\n\
595 sub print_backtrace\n\
596 {\n\
597 my $callchain = shift;\n\
598 for my $node (@$callchain)\n\
599 {\n\
600 if(exists $node->{sym})\n\
601 {\n\
602 printf( \"\\t[\\%%x] \\%%s\\n\", $node->{ip}, $node->{sym}{name});\n\
603 }\n\
604 else\n\
605 {\n\
606 printf( \"\\t[\\%%x]\\n\", $node{ip});\n\
607 }\n\
608 }\n\
609 }\n\n\
610 ");
611
612 nr_events = tep_get_events_count(pevent);
613 all_events = tep_list_events(pevent, TEP_EVENT_SORT_ID);
614
615 for (i = 0; all_events && i < nr_events; i++) {
616 event = all_events[i];
617 fprintf(ofp, "sub %s::%s\n{\n", event->system, event->name);
618 fprintf(ofp, "\tmy (");
619
620 fprintf(ofp, "$event_name, ");
621 fprintf(ofp, "$context, ");
622 fprintf(ofp, "$common_cpu, ");
623 fprintf(ofp, "$common_secs, ");
624 fprintf(ofp, "$common_nsecs,\n");
625 fprintf(ofp, "\t $common_pid, ");
626 fprintf(ofp, "$common_comm, ");
627 fprintf(ofp, "$common_callchain,\n\t ");
628
629 not_first = 0;
630 count = 0;
631
632 for (f = event->format.fields; f; f = f->next) {
633 if (not_first++)
634 fprintf(ofp, ", ");
635 if (++count % 5 == 0)
636 fprintf(ofp, "\n\t ");
637
638 fprintf(ofp, "$%s", f->name);
639 }
640 fprintf(ofp, ") = @_;\n\n");
641
642 fprintf(ofp, "\tprint_header($event_name, $common_cpu, "
643 "$common_secs, $common_nsecs,\n\t "
644 "$common_pid, $common_comm, $common_callchain);\n\n");
645
646 fprintf(ofp, "\tprintf(\"");
647
648 not_first = 0;
649 count = 0;
650
651 for (f = event->format.fields; f; f = f->next) {
652 if (not_first++)
653 fprintf(ofp, ", ");
654 if (count && count % 4 == 0) {
655 fprintf(ofp, "\".\n\t \"");
656 }
657 count++;
658
659 fprintf(ofp, "%s=", f->name);
660 if (f->flags & TEP_FIELD_IS_STRING ||
661 f->flags & TEP_FIELD_IS_FLAG ||
662 f->flags & TEP_FIELD_IS_SYMBOLIC)
663 fprintf(ofp, "%%s");
664 else if (f->flags & TEP_FIELD_IS_SIGNED)
665 fprintf(ofp, "%%d");
666 else
667 fprintf(ofp, "%%u");
668 }
669
670 fprintf(ofp, "\\n\",\n\t ");
671
672 not_first = 0;
673 count = 0;
674
675 for (f = event->format.fields; f; f = f->next) {
676 if (not_first++)
677 fprintf(ofp, ", ");
678
679 if (++count % 5 == 0)
680 fprintf(ofp, "\n\t ");
681
682 if (f->flags & TEP_FIELD_IS_FLAG) {
683 if ((count - 1) % 5 != 0) {
684 fprintf(ofp, "\n\t ");
685 count = 4;
686 }
687 fprintf(ofp, "flag_str(\"");
688 fprintf(ofp, "%s::%s\", ", event->system,
689 event->name);
690 fprintf(ofp, "\"%s\", $%s)", f->name,
691 f->name);
692 } else if (f->flags & TEP_FIELD_IS_SYMBOLIC) {
693 if ((count - 1) % 5 != 0) {
694 fprintf(ofp, "\n\t ");
695 count = 4;
696 }
697 fprintf(ofp, "symbol_str(\"");
698 fprintf(ofp, "%s::%s\", ", event->system,
699 event->name);
700 fprintf(ofp, "\"%s\", $%s)", f->name,
701 f->name);
702 } else
703 fprintf(ofp, "$%s", f->name);
704 }
705
706 fprintf(ofp, ");\n\n");
707
708 fprintf(ofp, "\tprint_backtrace($common_callchain);\n");
709
710 fprintf(ofp, "}\n\n");
711 }
712
713 fprintf(ofp, "sub trace_unhandled\n{\n\tmy ($event_name, $context, "
714 "$common_cpu, $common_secs, $common_nsecs,\n\t "
715 "$common_pid, $common_comm, $common_callchain) = @_;\n\n");
716
717 fprintf(ofp, "\tprint_header($event_name, $common_cpu, "
718 "$common_secs, $common_nsecs,\n\t $common_pid, "
719 "$common_comm, $common_callchain);\n");
720 fprintf(ofp, "\tprint_backtrace($common_callchain);\n");
721 fprintf(ofp, "}\n\n");
722
723 fprintf(ofp, "sub print_header\n{\n"
724 "\tmy ($event_name, $cpu, $secs, $nsecs, $pid, $comm) = @_;\n\n"
725 "\tprintf(\"%%-20s %%5u %%05u.%%09u %%8u %%-20s \",\n\t "
726 "$event_name, $cpu, $secs, $nsecs, $pid, $comm);\n}\n");
727
728 fprintf(ofp,
729 "\n# Packed byte string args of process_event():\n"
730 "#\n"
731 "# $event:\tunion perf_event\tutil/event.h\n"
732 "# $attr:\tstruct perf_event_attr\tlinux/perf_event.h\n"
733 "# $sample:\tstruct perf_sample\tutil/event.h\n"
734 "# $raw_data:\tperf_sample->raw_data\tutil/event.h\n"
735 "\n"
736 "sub process_event\n"
737 "{\n"
738 "\tmy ($event, $attr, $sample, $raw_data) = @_;\n"
739 "\n"
740 "\tmy @event\t= unpack(\"LSS\", $event);\n"
741 "\tmy @attr\t= unpack(\"LLQQQQQLLQQ\", $attr);\n"
742 "\tmy @sample\t= unpack(\"QLLQQQQQLL\", $sample);\n"
743 "\tmy @raw_data\t= unpack(\"C*\", $raw_data);\n"
744 "\n"
745 "\tuse Data::Dumper;\n"
746 "\tprint Dumper \\@event, \\@attr, \\@sample, \\@raw_data;\n"
747 "}\n");
748
749 fclose(ofp);
750
751 fprintf(stderr, "generated Perl script: %s\n", fname);
752
753 return 0;
754 }
755
756 struct scripting_ops perl_scripting_ops = {
757 .name = "Perl",
758 .dirname = "perl",
759 .start_script = perl_start_script,
760 .flush_script = perl_flush_script,
761 .stop_script = perl_stop_script,
762 .process_event = perl_process_event,
763 .generate_script = perl_generate_script,
764 };
765