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 extern struct scripting_context *scripting_context;
71
72 static char *cur_field_name;
73 static int zero_flag_atom;
74
define_symbolic_value(const char * ev_name,const char * field_name,const char * field_value,const char * field_str)75 static void define_symbolic_value(const char *ev_name,
76 const char *field_name,
77 const char *field_value,
78 const char *field_str)
79 {
80 unsigned long long value;
81 dSP;
82
83 value = eval_flag(field_value);
84
85 ENTER;
86 SAVETMPS;
87 PUSHMARK(SP);
88
89 XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
90 XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
91 XPUSHs(sv_2mortal(newSVuv(value)));
92 XPUSHs(sv_2mortal(newSVpv(field_str, 0)));
93
94 PUTBACK;
95 if (get_cv("main::define_symbolic_value", 0))
96 call_pv("main::define_symbolic_value", G_SCALAR);
97 SPAGAIN;
98 PUTBACK;
99 FREETMPS;
100 LEAVE;
101 }
102
define_symbolic_values(struct tep_print_flag_sym * field,const char * ev_name,const char * field_name)103 static void define_symbolic_values(struct tep_print_flag_sym *field,
104 const char *ev_name,
105 const char *field_name)
106 {
107 define_symbolic_value(ev_name, field_name, field->value, field->str);
108 if (field->next)
109 define_symbolic_values(field->next, ev_name, field_name);
110 }
111
define_symbolic_field(const char * ev_name,const char * field_name)112 static void define_symbolic_field(const char *ev_name,
113 const char *field_name)
114 {
115 dSP;
116
117 ENTER;
118 SAVETMPS;
119 PUSHMARK(SP);
120
121 XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
122 XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
123
124 PUTBACK;
125 if (get_cv("main::define_symbolic_field", 0))
126 call_pv("main::define_symbolic_field", G_SCALAR);
127 SPAGAIN;
128 PUTBACK;
129 FREETMPS;
130 LEAVE;
131 }
132
define_flag_value(const char * ev_name,const char * field_name,const char * field_value,const char * field_str)133 static void define_flag_value(const char *ev_name,
134 const char *field_name,
135 const char *field_value,
136 const char *field_str)
137 {
138 unsigned long long value;
139 dSP;
140
141 value = eval_flag(field_value);
142
143 ENTER;
144 SAVETMPS;
145 PUSHMARK(SP);
146
147 XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
148 XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
149 XPUSHs(sv_2mortal(newSVuv(value)));
150 XPUSHs(sv_2mortal(newSVpv(field_str, 0)));
151
152 PUTBACK;
153 if (get_cv("main::define_flag_value", 0))
154 call_pv("main::define_flag_value", G_SCALAR);
155 SPAGAIN;
156 PUTBACK;
157 FREETMPS;
158 LEAVE;
159 }
160
define_flag_values(struct tep_print_flag_sym * field,const char * ev_name,const char * field_name)161 static void define_flag_values(struct tep_print_flag_sym *field,
162 const char *ev_name,
163 const char *field_name)
164 {
165 define_flag_value(ev_name, field_name, field->value, field->str);
166 if (field->next)
167 define_flag_values(field->next, ev_name, field_name);
168 }
169
define_flag_field(const char * ev_name,const char * field_name,const char * delim)170 static void define_flag_field(const char *ev_name,
171 const char *field_name,
172 const char *delim)
173 {
174 dSP;
175
176 ENTER;
177 SAVETMPS;
178 PUSHMARK(SP);
179
180 XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
181 XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
182 XPUSHs(sv_2mortal(newSVpv(delim, 0)));
183
184 PUTBACK;
185 if (get_cv("main::define_flag_field", 0))
186 call_pv("main::define_flag_field", G_SCALAR);
187 SPAGAIN;
188 PUTBACK;
189 FREETMPS;
190 LEAVE;
191 }
192
define_event_symbols(struct tep_event * event,const char * ev_name,struct tep_print_arg * args)193 static void define_event_symbols(struct tep_event *event,
194 const char *ev_name,
195 struct tep_print_arg *args)
196 {
197 if (args == NULL)
198 return;
199
200 switch (args->type) {
201 case TEP_PRINT_NULL:
202 break;
203 case TEP_PRINT_ATOM:
204 define_flag_value(ev_name, cur_field_name, "0",
205 args->atom.atom);
206 zero_flag_atom = 0;
207 break;
208 case TEP_PRINT_FIELD:
209 free(cur_field_name);
210 cur_field_name = strdup(args->field.name);
211 break;
212 case TEP_PRINT_FLAGS:
213 define_event_symbols(event, ev_name, args->flags.field);
214 define_flag_field(ev_name, cur_field_name, args->flags.delim);
215 define_flag_values(args->flags.flags, ev_name, cur_field_name);
216 break;
217 case TEP_PRINT_SYMBOL:
218 define_event_symbols(event, ev_name, args->symbol.field);
219 define_symbolic_field(ev_name, cur_field_name);
220 define_symbolic_values(args->symbol.symbols, ev_name,
221 cur_field_name);
222 break;
223 case TEP_PRINT_HEX:
224 case TEP_PRINT_HEX_STR:
225 define_event_symbols(event, ev_name, args->hex.field);
226 define_event_symbols(event, ev_name, args->hex.size);
227 break;
228 case TEP_PRINT_INT_ARRAY:
229 define_event_symbols(event, ev_name, args->int_array.field);
230 define_event_symbols(event, ev_name, args->int_array.count);
231 define_event_symbols(event, ev_name, args->int_array.el_size);
232 break;
233 case TEP_PRINT_BSTRING:
234 case TEP_PRINT_DYNAMIC_ARRAY:
235 case TEP_PRINT_DYNAMIC_ARRAY_LEN:
236 case TEP_PRINT_STRING:
237 case TEP_PRINT_BITMASK:
238 break;
239 case TEP_PRINT_TYPE:
240 define_event_symbols(event, ev_name, args->typecast.item);
241 break;
242 case TEP_PRINT_OP:
243 if (strcmp(args->op.op, ":") == 0)
244 zero_flag_atom = 1;
245 define_event_symbols(event, ev_name, args->op.left);
246 define_event_symbols(event, ev_name, args->op.right);
247 break;
248 case TEP_PRINT_FUNC:
249 default:
250 pr_err("Unsupported print arg type\n");
251 /* we should warn... */
252 return;
253 }
254
255 if (args->next)
256 define_event_symbols(event, ev_name, args->next);
257 }
258
perl_process_callchain(struct perf_sample * sample,struct evsel * evsel,struct addr_location * al)259 static SV *perl_process_callchain(struct perf_sample *sample,
260 struct evsel *evsel,
261 struct addr_location *al)
262 {
263 struct callchain_cursor *cursor;
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 cursor = get_tls_callchain_cursor();
274
275 if (thread__resolve_callchain(al->thread, cursor, evsel,
276 sample, NULL, NULL, scripting_max_stack) != 0) {
277 pr_err("Failed to resolve callchain. Skipping\n");
278 goto exit;
279 }
280 callchain_cursor_commit(cursor);
281
282
283 while (1) {
284 HV *elem;
285 struct callchain_cursor_node *node;
286 node = callchain_cursor_current(cursor);
287 if (!node)
288 break;
289
290 elem = newHV();
291 if (!elem)
292 goto exit;
293
294 if (!hv_stores(elem, "ip", newSVuv(node->ip))) {
295 hv_undef(elem);
296 goto exit;
297 }
298
299 if (node->ms.sym) {
300 HV *sym = newHV();
301 if (!sym) {
302 hv_undef(elem);
303 goto exit;
304 }
305 if (!hv_stores(sym, "start", newSVuv(node->ms.sym->start)) ||
306 !hv_stores(sym, "end", newSVuv(node->ms.sym->end)) ||
307 !hv_stores(sym, "binding", newSVuv(node->ms.sym->binding)) ||
308 !hv_stores(sym, "name", newSVpvn(node->ms.sym->name,
309 node->ms.sym->namelen)) ||
310 !hv_stores(elem, "sym", newRV_noinc((SV*)sym))) {
311 hv_undef(sym);
312 hv_undef(elem);
313 goto exit;
314 }
315 }
316
317 if (node->ms.map) {
318 struct map *map = node->ms.map;
319 struct dso *dso = map ? map__dso(map) : NULL;
320 const char *dsoname = "[unknown]";
321
322 if (dso) {
323 if (symbol_conf.show_kernel_path && dso->long_name)
324 dsoname = dso->long_name;
325 else
326 dsoname = dso->name;
327 }
328 if (!hv_stores(elem, "dso", newSVpv(dsoname,0))) {
329 hv_undef(elem);
330 goto exit;
331 }
332 }
333
334 callchain_cursor_advance(cursor);
335 av_push(list, newRV_noinc((SV*)elem));
336 }
337
338 exit:
339 return newRV_noinc((SV*)list);
340 }
341
perl_process_tracepoint(struct perf_sample * sample,struct evsel * evsel,struct addr_location * al)342 static void perl_process_tracepoint(struct perf_sample *sample,
343 struct evsel *evsel,
344 struct addr_location *al)
345 {
346 struct thread *thread = al->thread;
347 struct tep_event *event = evsel->tp_format;
348 struct tep_format_field *field;
349 static char handler[256];
350 unsigned long long val;
351 unsigned long s, ns;
352 int pid;
353 int cpu = sample->cpu;
354 void *data = sample->raw_data;
355 unsigned long long nsecs = sample->time;
356 const char *comm = thread__comm_str(thread);
357 DECLARE_BITMAP(events_defined, TRACE_EVENT_TYPE_MAX);
358
359 bitmap_zero(events_defined, TRACE_EVENT_TYPE_MAX);
360 dSP;
361
362 if (evsel->core.attr.type != PERF_TYPE_TRACEPOINT)
363 return;
364
365 if (!event) {
366 pr_debug("ug! no event found for type %" PRIu64, (u64)evsel->core.attr.config);
367 return;
368 }
369
370 pid = raw_field_value(event, "common_pid", data);
371
372 sprintf(handler, "%s::%s", event->system, event->name);
373
374 if (!__test_and_set_bit(event->id, events_defined))
375 define_event_symbols(event, handler, event->print_fmt.args);
376
377 s = nsecs / NSEC_PER_SEC;
378 ns = nsecs - s * NSEC_PER_SEC;
379
380 ENTER;
381 SAVETMPS;
382 PUSHMARK(SP);
383
384 XPUSHs(sv_2mortal(newSVpv(handler, 0)));
385 XPUSHs(sv_2mortal(newSViv(PTR2IV(scripting_context))));
386 XPUSHs(sv_2mortal(newSVuv(cpu)));
387 XPUSHs(sv_2mortal(newSVuv(s)));
388 XPUSHs(sv_2mortal(newSVuv(ns)));
389 XPUSHs(sv_2mortal(newSViv(pid)));
390 XPUSHs(sv_2mortal(newSVpv(comm, 0)));
391 XPUSHs(sv_2mortal(perl_process_callchain(sample, evsel, al)));
392
393 /* common fields other than pid can be accessed via xsub fns */
394
395 for (field = event->format.fields; field; field = field->next) {
396 if (field->flags & TEP_FIELD_IS_STRING) {
397 int offset;
398 if (field->flags & TEP_FIELD_IS_DYNAMIC) {
399 offset = *(int *)(data + field->offset);
400 offset &= 0xffff;
401 if (tep_field_is_relative(field->flags))
402 offset += field->offset + field->size;
403 } else
404 offset = field->offset;
405 XPUSHs(sv_2mortal(newSVpv((char *)data + offset, 0)));
406 } else { /* FIELD_IS_NUMERIC */
407 val = read_size(event, data + field->offset,
408 field->size);
409 if (field->flags & TEP_FIELD_IS_SIGNED) {
410 XPUSHs(sv_2mortal(newSViv(val)));
411 } else {
412 XPUSHs(sv_2mortal(newSVuv(val)));
413 }
414 }
415 }
416
417 PUTBACK;
418
419 if (get_cv(handler, 0))
420 call_pv(handler, G_SCALAR);
421 else if (get_cv("main::trace_unhandled", 0)) {
422 XPUSHs(sv_2mortal(newSVpv(handler, 0)));
423 XPUSHs(sv_2mortal(newSViv(PTR2IV(scripting_context))));
424 XPUSHs(sv_2mortal(newSVuv(cpu)));
425 XPUSHs(sv_2mortal(newSVuv(nsecs)));
426 XPUSHs(sv_2mortal(newSViv(pid)));
427 XPUSHs(sv_2mortal(newSVpv(comm, 0)));
428 XPUSHs(sv_2mortal(perl_process_callchain(sample, evsel, al)));
429 call_pv("main::trace_unhandled", G_SCALAR);
430 }
431 SPAGAIN;
432 PUTBACK;
433 FREETMPS;
434 LEAVE;
435 }
436
perl_process_event_generic(union perf_event * event,struct perf_sample * sample,struct evsel * evsel)437 static void perl_process_event_generic(union perf_event *event,
438 struct perf_sample *sample,
439 struct evsel *evsel)
440 {
441 dSP;
442
443 if (!get_cv("process_event", 0))
444 return;
445
446 ENTER;
447 SAVETMPS;
448 PUSHMARK(SP);
449 XPUSHs(sv_2mortal(newSVpvn((const char *)event, event->header.size)));
450 XPUSHs(sv_2mortal(newSVpvn((const char *)&evsel->core.attr, sizeof(evsel->core.attr))));
451 XPUSHs(sv_2mortal(newSVpvn((const char *)sample, sizeof(*sample))));
452 XPUSHs(sv_2mortal(newSVpvn((const char *)sample->raw_data, sample->raw_size)));
453 PUTBACK;
454 call_pv("process_event", G_SCALAR);
455 SPAGAIN;
456 PUTBACK;
457 FREETMPS;
458 LEAVE;
459 }
460
perl_process_event(union perf_event * event,struct perf_sample * sample,struct evsel * evsel,struct addr_location * al,struct addr_location * addr_al)461 static void perl_process_event(union perf_event *event,
462 struct perf_sample *sample,
463 struct evsel *evsel,
464 struct addr_location *al,
465 struct addr_location *addr_al)
466 {
467 scripting_context__update(scripting_context, event, sample, evsel, al, addr_al);
468 perl_process_tracepoint(sample, evsel, al);
469 perl_process_event_generic(event, sample, evsel);
470 }
471
run_start_sub(void)472 static void run_start_sub(void)
473 {
474 dSP; /* access to Perl stack */
475 PUSHMARK(SP);
476
477 if (get_cv("main::trace_begin", 0))
478 call_pv("main::trace_begin", G_DISCARD | G_NOARGS);
479 }
480
481 /*
482 * Start trace script
483 */
perl_start_script(const char * script,int argc,const char ** argv,struct perf_session * session)484 static int perl_start_script(const char *script, int argc, const char **argv,
485 struct perf_session *session)
486 {
487 const char **command_line;
488 int i, err = 0;
489
490 scripting_context->session = session;
491
492 command_line = malloc((argc + 2) * sizeof(const char *));
493 command_line[0] = "";
494 command_line[1] = script;
495 for (i = 2; i < argc + 2; i++)
496 command_line[i] = argv[i - 2];
497
498 my_perl = perl_alloc();
499 perl_construct(my_perl);
500
501 if (perl_parse(my_perl, xs_init, argc + 2, (char **)command_line,
502 (char **)NULL)) {
503 err = -1;
504 goto error;
505 }
506
507 if (perl_run(my_perl)) {
508 err = -1;
509 goto error;
510 }
511
512 if (SvTRUE(ERRSV)) {
513 err = -1;
514 goto error;
515 }
516
517 run_start_sub();
518
519 free(command_line);
520 return 0;
521 error:
522 perl_free(my_perl);
523 free(command_line);
524
525 return err;
526 }
527
perl_flush_script(void)528 static int perl_flush_script(void)
529 {
530 return 0;
531 }
532
533 /*
534 * Stop trace script
535 */
perl_stop_script(void)536 static int perl_stop_script(void)
537 {
538 dSP; /* access to Perl stack */
539 PUSHMARK(SP);
540
541 if (get_cv("main::trace_end", 0))
542 call_pv("main::trace_end", G_DISCARD | G_NOARGS);
543
544 perl_destruct(my_perl);
545 perl_free(my_perl);
546
547 return 0;
548 }
549
perl_generate_script(struct tep_handle * pevent,const char * outfile)550 static int perl_generate_script(struct tep_handle *pevent, const char *outfile)
551 {
552 int i, not_first, count, nr_events;
553 struct tep_event **all_events;
554 struct tep_event *event = NULL;
555 struct tep_format_field *f;
556 char fname[PATH_MAX];
557 FILE *ofp;
558
559 sprintf(fname, "%s.pl", outfile);
560 ofp = fopen(fname, "w");
561 if (ofp == NULL) {
562 fprintf(stderr, "couldn't open %s\n", fname);
563 return -1;
564 }
565
566 fprintf(ofp, "# perf script event handlers, "
567 "generated by perf script -g perl\n");
568
569 fprintf(ofp, "# Licensed under the terms of the GNU GPL"
570 " License version 2\n\n");
571
572 fprintf(ofp, "# The common_* event handler fields are the most useful "
573 "fields common to\n");
574
575 fprintf(ofp, "# all events. They don't necessarily correspond to "
576 "the 'common_*' fields\n");
577
578 fprintf(ofp, "# in the format files. Those fields not available as "
579 "handler params can\n");
580
581 fprintf(ofp, "# be retrieved using Perl functions of the form "
582 "common_*($context).\n");
583
584 fprintf(ofp, "# See Context.pm for the list of available "
585 "functions.\n\n");
586
587 fprintf(ofp, "use lib \"$ENV{'PERF_EXEC_PATH'}/scripts/perl/"
588 "Perf-Trace-Util/lib\";\n");
589
590 fprintf(ofp, "use lib \"./Perf-Trace-Util/lib\";\n");
591 fprintf(ofp, "use Perf::Trace::Core;\n");
592 fprintf(ofp, "use Perf::Trace::Context;\n");
593 fprintf(ofp, "use Perf::Trace::Util;\n\n");
594
595 fprintf(ofp, "sub trace_begin\n{\n\t# optional\n}\n\n");
596 fprintf(ofp, "sub trace_end\n{\n\t# optional\n}\n");
597
598
599 fprintf(ofp, "\n\
600 sub print_backtrace\n\
601 {\n\
602 my $callchain = shift;\n\
603 for my $node (@$callchain)\n\
604 {\n\
605 if(exists $node->{sym})\n\
606 {\n\
607 printf( \"\\t[\\%%x] \\%%s\\n\", $node->{ip}, $node->{sym}{name});\n\
608 }\n\
609 else\n\
610 {\n\
611 printf( \"\\t[\\%%x]\\n\", $node{ip});\n\
612 }\n\
613 }\n\
614 }\n\n\
615 ");
616
617 nr_events = tep_get_events_count(pevent);
618 all_events = tep_list_events(pevent, TEP_EVENT_SORT_ID);
619
620 for (i = 0; all_events && i < nr_events; i++) {
621 event = all_events[i];
622 fprintf(ofp, "sub %s::%s\n{\n", event->system, event->name);
623 fprintf(ofp, "\tmy (");
624
625 fprintf(ofp, "$event_name, ");
626 fprintf(ofp, "$context, ");
627 fprintf(ofp, "$common_cpu, ");
628 fprintf(ofp, "$common_secs, ");
629 fprintf(ofp, "$common_nsecs,\n");
630 fprintf(ofp, "\t $common_pid, ");
631 fprintf(ofp, "$common_comm, ");
632 fprintf(ofp, "$common_callchain,\n\t ");
633
634 not_first = 0;
635 count = 0;
636
637 for (f = event->format.fields; f; f = f->next) {
638 if (not_first++)
639 fprintf(ofp, ", ");
640 if (++count % 5 == 0)
641 fprintf(ofp, "\n\t ");
642
643 fprintf(ofp, "$%s", f->name);
644 }
645 fprintf(ofp, ") = @_;\n\n");
646
647 fprintf(ofp, "\tprint_header($event_name, $common_cpu, "
648 "$common_secs, $common_nsecs,\n\t "
649 "$common_pid, $common_comm, $common_callchain);\n\n");
650
651 fprintf(ofp, "\tprintf(\"");
652
653 not_first = 0;
654 count = 0;
655
656 for (f = event->format.fields; f; f = f->next) {
657 if (not_first++)
658 fprintf(ofp, ", ");
659 if (count && count % 4 == 0) {
660 fprintf(ofp, "\".\n\t \"");
661 }
662 count++;
663
664 fprintf(ofp, "%s=", f->name);
665 if (f->flags & TEP_FIELD_IS_STRING ||
666 f->flags & TEP_FIELD_IS_FLAG ||
667 f->flags & TEP_FIELD_IS_SYMBOLIC)
668 fprintf(ofp, "%%s");
669 else if (f->flags & TEP_FIELD_IS_SIGNED)
670 fprintf(ofp, "%%d");
671 else
672 fprintf(ofp, "%%u");
673 }
674
675 fprintf(ofp, "\\n\",\n\t ");
676
677 not_first = 0;
678 count = 0;
679
680 for (f = event->format.fields; f; f = f->next) {
681 if (not_first++)
682 fprintf(ofp, ", ");
683
684 if (++count % 5 == 0)
685 fprintf(ofp, "\n\t ");
686
687 if (f->flags & TEP_FIELD_IS_FLAG) {
688 if ((count - 1) % 5 != 0) {
689 fprintf(ofp, "\n\t ");
690 count = 4;
691 }
692 fprintf(ofp, "flag_str(\"");
693 fprintf(ofp, "%s::%s\", ", event->system,
694 event->name);
695 fprintf(ofp, "\"%s\", $%s)", f->name,
696 f->name);
697 } else if (f->flags & TEP_FIELD_IS_SYMBOLIC) {
698 if ((count - 1) % 5 != 0) {
699 fprintf(ofp, "\n\t ");
700 count = 4;
701 }
702 fprintf(ofp, "symbol_str(\"");
703 fprintf(ofp, "%s::%s\", ", event->system,
704 event->name);
705 fprintf(ofp, "\"%s\", $%s)", f->name,
706 f->name);
707 } else
708 fprintf(ofp, "$%s", f->name);
709 }
710
711 fprintf(ofp, ");\n\n");
712
713 fprintf(ofp, "\tprint_backtrace($common_callchain);\n");
714
715 fprintf(ofp, "}\n\n");
716 }
717
718 fprintf(ofp, "sub trace_unhandled\n{\n\tmy ($event_name, $context, "
719 "$common_cpu, $common_secs, $common_nsecs,\n\t "
720 "$common_pid, $common_comm, $common_callchain) = @_;\n\n");
721
722 fprintf(ofp, "\tprint_header($event_name, $common_cpu, "
723 "$common_secs, $common_nsecs,\n\t $common_pid, "
724 "$common_comm, $common_callchain);\n");
725 fprintf(ofp, "\tprint_backtrace($common_callchain);\n");
726 fprintf(ofp, "}\n\n");
727
728 fprintf(ofp, "sub print_header\n{\n"
729 "\tmy ($event_name, $cpu, $secs, $nsecs, $pid, $comm) = @_;\n\n"
730 "\tprintf(\"%%-20s %%5u %%05u.%%09u %%8u %%-20s \",\n\t "
731 "$event_name, $cpu, $secs, $nsecs, $pid, $comm);\n}\n");
732
733 fprintf(ofp,
734 "\n# Packed byte string args of process_event():\n"
735 "#\n"
736 "# $event:\tunion perf_event\tutil/event.h\n"
737 "# $attr:\tstruct perf_event_attr\tlinux/perf_event.h\n"
738 "# $sample:\tstruct perf_sample\tutil/event.h\n"
739 "# $raw_data:\tperf_sample->raw_data\tutil/event.h\n"
740 "\n"
741 "sub process_event\n"
742 "{\n"
743 "\tmy ($event, $attr, $sample, $raw_data) = @_;\n"
744 "\n"
745 "\tmy @event\t= unpack(\"LSS\", $event);\n"
746 "\tmy @attr\t= unpack(\"LLQQQQQLLQQ\", $attr);\n"
747 "\tmy @sample\t= unpack(\"QLLQQQQQLL\", $sample);\n"
748 "\tmy @raw_data\t= unpack(\"C*\", $raw_data);\n"
749 "\n"
750 "\tuse Data::Dumper;\n"
751 "\tprint Dumper \\@event, \\@attr, \\@sample, \\@raw_data;\n"
752 "}\n");
753
754 fclose(ofp);
755
756 fprintf(stderr, "generated Perl script: %s\n", fname);
757
758 return 0;
759 }
760
761 struct scripting_ops perl_scripting_ops = {
762 .name = "Perl",
763 .dirname = "perl",
764 .start_script = perl_start_script,
765 .flush_script = perl_flush_script,
766 .stop_script = perl_stop_script,
767 .process_event = perl_process_event,
768 .generate_script = perl_generate_script,
769 };
770