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