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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 <stdio.h>
23#include <stdlib.h>
24#include <string.h>
25#include <ctype.h>
26#include <errno.h>
27#include <linux/bitmap.h>
28#include <linux/time64.h>
29
30#include "../util.h"
31#include <EXTERN.h>
32#include <perl.h>
33
34#include "../../perf.h"
35#include "../callchain.h"
36#include "../machine.h"
37#include "../thread.h"
38#include "../event.h"
39#include "../trace-event.h"
40#include "../evsel.h"
41#include "../debug.h"
42
43void boot_Perf__Trace__Context(pTHX_ CV *cv);
44void boot_DynaLoader(pTHX_ CV *cv);
45typedef PerlInterpreter * INTERP;
46
47void xs_init(pTHX);
48
49void xs_init(pTHX)
50{
51 const char *file = __FILE__;
52 dXSUB_SYS;
53
54 newXS("Perf::Trace::Context::bootstrap", boot_Perf__Trace__Context,
55 file);
56 newXS("DynaLoader::boot_DynaLoader", boot_DynaLoader, file);
57}
58
59INTERP my_perl;
60
61#define TRACE_EVENT_TYPE_MAX \
62 ((1 << (sizeof(unsigned short) * 8)) - 1)
63
64static DECLARE_BITMAP(events_defined, TRACE_EVENT_TYPE_MAX);
65
66extern struct scripting_context *scripting_context;
67
68static char *cur_field_name;
69static int zero_flag_atom;
70
71static void define_symbolic_value(const char *ev_name,
72 const char *field_name,
73 const char *field_value,
74 const char *field_str)
75{
76 unsigned long long value;
77 dSP;
78
79 value = eval_flag(field_value);
80
81 ENTER;
82 SAVETMPS;
83 PUSHMARK(SP);
84
85 XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
86 XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
87 XPUSHs(sv_2mortal(newSVuv(value)));
88 XPUSHs(sv_2mortal(newSVpv(field_str, 0)));
89
90 PUTBACK;
91 if (get_cv("main::define_symbolic_value", 0))
92 call_pv("main::define_symbolic_value", G_SCALAR);
93 SPAGAIN;
94 PUTBACK;
95 FREETMPS;
96 LEAVE;
97}
98
99static void define_symbolic_values(struct print_flag_sym *field,
100 const char *ev_name,
101 const char *field_name)
102{
103 define_symbolic_value(ev_name, field_name, field->value, field->str);
104 if (field->next)
105 define_symbolic_values(field->next, ev_name, field_name);
106}
107
108static void define_symbolic_field(const char *ev_name,
109 const char *field_name)
110{
111 dSP;
112
113 ENTER;
114 SAVETMPS;
115 PUSHMARK(SP);
116
117 XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
118 XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
119
120 PUTBACK;
121 if (get_cv("main::define_symbolic_field", 0))
122 call_pv("main::define_symbolic_field", G_SCALAR);
123 SPAGAIN;
124 PUTBACK;
125 FREETMPS;
126 LEAVE;
127}
128
129static void define_flag_value(const char *ev_name,
130 const char *field_name,
131 const char *field_value,
132 const char *field_str)
133{
134 unsigned long long value;
135 dSP;
136
137 value = eval_flag(field_value);
138
139 ENTER;
140 SAVETMPS;
141 PUSHMARK(SP);
142
143 XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
144 XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
145 XPUSHs(sv_2mortal(newSVuv(value)));
146 XPUSHs(sv_2mortal(newSVpv(field_str, 0)));
147
148 PUTBACK;
149 if (get_cv("main::define_flag_value", 0))
150 call_pv("main::define_flag_value", G_SCALAR);
151 SPAGAIN;
152 PUTBACK;
153 FREETMPS;
154 LEAVE;
155}
156
157static void define_flag_values(struct print_flag_sym *field,
158 const char *ev_name,
159 const char *field_name)
160{
161 define_flag_value(ev_name, field_name, field->value, field->str);
162 if (field->next)
163 define_flag_values(field->next, ev_name, field_name);
164}
165
166static void define_flag_field(const char *ev_name,
167 const char *field_name,
168 const char *delim)
169{
170 dSP;
171
172 ENTER;
173 SAVETMPS;
174 PUSHMARK(SP);
175
176 XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
177 XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
178 XPUSHs(sv_2mortal(newSVpv(delim, 0)));
179
180 PUTBACK;
181 if (get_cv("main::define_flag_field", 0))
182 call_pv("main::define_flag_field", G_SCALAR);
183 SPAGAIN;
184 PUTBACK;
185 FREETMPS;
186 LEAVE;
187}
188
189static void define_event_symbols(struct event_format *event,
190 const char *ev_name,
191 struct print_arg *args)
192{
193 if (args == NULL)
194 return;
195
196 switch (args->type) {
197 case PRINT_NULL:
198 break;
199 case PRINT_ATOM:
200 define_flag_value(ev_name, cur_field_name, "0",
201 args->atom.atom);
202 zero_flag_atom = 0;
203 break;
204 case PRINT_FIELD:
205 free(cur_field_name);
206 cur_field_name = strdup(args->field.name);
207 break;
208 case PRINT_FLAGS:
209 define_event_symbols(event, ev_name, args->flags.field);
210 define_flag_field(ev_name, cur_field_name, args->flags.delim);
211 define_flag_values(args->flags.flags, ev_name, cur_field_name);
212 break;
213 case PRINT_SYMBOL:
214 define_event_symbols(event, ev_name, args->symbol.field);
215 define_symbolic_field(ev_name, cur_field_name);
216 define_symbolic_values(args->symbol.symbols, ev_name,
217 cur_field_name);
218 break;
219 case PRINT_HEX:
220 define_event_symbols(event, ev_name, args->hex.field);
221 define_event_symbols(event, ev_name, args->hex.size);
222 break;
223 case PRINT_INT_ARRAY:
224 define_event_symbols(event, ev_name, args->int_array.field);
225 define_event_symbols(event, ev_name, args->int_array.count);
226 define_event_symbols(event, ev_name, args->int_array.el_size);
227 break;
228 case PRINT_BSTRING:
229 case PRINT_DYNAMIC_ARRAY:
230 case PRINT_DYNAMIC_ARRAY_LEN:
231 case PRINT_STRING:
232 case PRINT_BITMASK:
233 break;
234 case PRINT_TYPE:
235 define_event_symbols(event, ev_name, args->typecast.item);
236 break;
237 case PRINT_OP:
238 if (strcmp(args->op.op, ":") == 0)
239 zero_flag_atom = 1;
240 define_event_symbols(event, ev_name, args->op.left);
241 define_event_symbols(event, ev_name, args->op.right);
242 break;
243 case PRINT_FUNC:
244 default:
245 pr_err("Unsupported print arg type\n");
246 /* we should warn... */
247 return;
248 }
249
250 if (args->next)
251 define_event_symbols(event, ev_name, args->next);
252}
253
254static SV *perl_process_callchain(struct perf_sample *sample,
255 struct perf_evsel *evsel,
256 struct addr_location *al)
257{
258 AV *list;
259
260 list = newAV();
261 if (!list)
262 goto exit;
263
264 if (!symbol_conf.use_callchain || !sample->callchain)
265 goto exit;
266
267 if (thread__resolve_callchain(al->thread, &callchain_cursor, evsel,
268 sample, NULL, NULL, scripting_max_stack) != 0) {
269 pr_err("Failed to resolve callchain. Skipping\n");
270 goto exit;
271 }
272 callchain_cursor_commit(&callchain_cursor);
273
274
275 while (1) {
276 HV *elem;
277 struct callchain_cursor_node *node;
278 node = callchain_cursor_current(&callchain_cursor);
279 if (!node)
280 break;
281
282 elem = newHV();
283 if (!elem)
284 goto exit;
285
286 if (!hv_stores(elem, "ip", newSVuv(node->ip))) {
287 hv_undef(elem);
288 goto exit;
289 }
290
291 if (node->sym) {
292 HV *sym = newHV();
293 if (!sym) {
294 hv_undef(elem);
295 goto exit;
296 }
297 if (!hv_stores(sym, "start", newSVuv(node->sym->start)) ||
298 !hv_stores(sym, "end", newSVuv(node->sym->end)) ||
299 !hv_stores(sym, "binding", newSVuv(node->sym->binding)) ||
300 !hv_stores(sym, "name", newSVpvn(node->sym->name,
301 node->sym->namelen)) ||
302 !hv_stores(elem, "sym", newRV_noinc((SV*)sym))) {
303 hv_undef(sym);
304 hv_undef(elem);
305 goto exit;
306 }
307 }
308
309 if (node->map) {
310 struct map *map = node->map;
311 const char *dsoname = "[unknown]";
312 if (map && map->dso && (map->dso->name || map->dso->long_name)) {
313 if (symbol_conf.show_kernel_path && map->dso->long_name)
314 dsoname = map->dso->long_name;
315 else if (map->dso->name)
316 dsoname = map->dso->name;
317 }
318 if (!hv_stores(elem, "dso", newSVpv(dsoname,0))) {
319 hv_undef(elem);
320 goto exit;
321 }
322 }
323
324 callchain_cursor_advance(&callchain_cursor);
325 av_push(list, newRV_noinc((SV*)elem));
326 }
327
328exit:
329 return newRV_noinc((SV*)list);
330}
331
332static void perl_process_tracepoint(struct perf_sample *sample,
333 struct perf_evsel *evsel,
334 struct addr_location *al)
335{
336 struct thread *thread = al->thread;
337 struct event_format *event = evsel->tp_format;
338 struct format_field *field;
339 static char handler[256];
340 unsigned long long val;
341 unsigned long s, ns;
342 int pid;
343 int cpu = sample->cpu;
344 void *data = sample->raw_data;
345 unsigned long long nsecs = sample->time;
346 const char *comm = thread__comm_str(thread);
347
348 dSP;
349
350 if (evsel->attr.type != PERF_TYPE_TRACEPOINT)
351 return;
352
353 if (!event)
354 die("ug! no event found for type %" PRIu64, (u64)evsel->attr.config);
355
356 pid = raw_field_value(event, "common_pid", data);
357
358 sprintf(handler, "%s::%s", event->system, event->name);
359
360 if (!test_and_set_bit(event->id, events_defined))
361 define_event_symbols(event, handler, event->print_fmt.args);
362
363 s = nsecs / NSEC_PER_SEC;
364 ns = nsecs - s * NSEC_PER_SEC;
365
366 scripting_context->event_data = data;
367 scripting_context->pevent = evsel->tp_format->pevent;
368
369 ENTER;
370 SAVETMPS;
371 PUSHMARK(SP);
372
373 XPUSHs(sv_2mortal(newSVpv(handler, 0)));
374 XPUSHs(sv_2mortal(newSViv(PTR2IV(scripting_context))));
375 XPUSHs(sv_2mortal(newSVuv(cpu)));
376 XPUSHs(sv_2mortal(newSVuv(s)));
377 XPUSHs(sv_2mortal(newSVuv(ns)));
378 XPUSHs(sv_2mortal(newSViv(pid)));
379 XPUSHs(sv_2mortal(newSVpv(comm, 0)));
380 XPUSHs(sv_2mortal(perl_process_callchain(sample, evsel, al)));
381
382 /* common fields other than pid can be accessed via xsub fns */
383
384 for (field = event->format.fields; field; field = field->next) {
385 if (field->flags & FIELD_IS_STRING) {
386 int offset;
387 if (field->flags & FIELD_IS_DYNAMIC) {
388 offset = *(int *)(data + field->offset);
389 offset &= 0xffff;
390 } else
391 offset = field->offset;
392 XPUSHs(sv_2mortal(newSVpv((char *)data + offset, 0)));
393 } else { /* FIELD_IS_NUMERIC */
394 val = read_size(event, data + field->offset,
395 field->size);
396 if (field->flags & FIELD_IS_SIGNED) {
397 XPUSHs(sv_2mortal(newSViv(val)));
398 } else {
399 XPUSHs(sv_2mortal(newSVuv(val)));
400 }
401 }
402 }
403
404 PUTBACK;
405
406 if (get_cv(handler, 0))
407 call_pv(handler, G_SCALAR);
408 else if (get_cv("main::trace_unhandled", 0)) {
409 XPUSHs(sv_2mortal(newSVpv(handler, 0)));
410 XPUSHs(sv_2mortal(newSViv(PTR2IV(scripting_context))));
411 XPUSHs(sv_2mortal(newSVuv(cpu)));
412 XPUSHs(sv_2mortal(newSVuv(nsecs)));
413 XPUSHs(sv_2mortal(newSViv(pid)));
414 XPUSHs(sv_2mortal(newSVpv(comm, 0)));
415 XPUSHs(sv_2mortal(perl_process_callchain(sample, evsel, al)));
416 call_pv("main::trace_unhandled", G_SCALAR);
417 }
418 SPAGAIN;
419 PUTBACK;
420 FREETMPS;
421 LEAVE;
422}
423
424static void perl_process_event_generic(union perf_event *event,
425 struct perf_sample *sample,
426 struct perf_evsel *evsel)
427{
428 dSP;
429
430 if (!get_cv("process_event", 0))
431 return;
432
433 ENTER;
434 SAVETMPS;
435 PUSHMARK(SP);
436 XPUSHs(sv_2mortal(newSVpvn((const char *)event, event->header.size)));
437 XPUSHs(sv_2mortal(newSVpvn((const char *)&evsel->attr, sizeof(evsel->attr))));
438 XPUSHs(sv_2mortal(newSVpvn((const char *)sample, sizeof(*sample))));
439 XPUSHs(sv_2mortal(newSVpvn((const char *)sample->raw_data, sample->raw_size)));
440 PUTBACK;
441 call_pv("process_event", G_SCALAR);
442 SPAGAIN;
443 PUTBACK;
444 FREETMPS;
445 LEAVE;
446}
447
448static void perl_process_event(union perf_event *event,
449 struct perf_sample *sample,
450 struct perf_evsel *evsel,
451 struct addr_location *al)
452{
453 perl_process_tracepoint(sample, evsel, al);
454 perl_process_event_generic(event, sample, evsel);
455}
456
457static void run_start_sub(void)
458{
459 dSP; /* access to Perl stack */
460 PUSHMARK(SP);
461
462 if (get_cv("main::trace_begin", 0))
463 call_pv("main::trace_begin", G_DISCARD | G_NOARGS);
464}
465
466/*
467 * Start trace script
468 */
469static int perl_start_script(const char *script, int argc, const char **argv)
470{
471 const char **command_line;
472 int i, err = 0;
473
474 command_line = malloc((argc + 2) * sizeof(const char *));
475 command_line[0] = "";
476 command_line[1] = script;
477 for (i = 2; i < argc + 2; i++)
478 command_line[i] = argv[i - 2];
479
480 my_perl = perl_alloc();
481 perl_construct(my_perl);
482
483 if (perl_parse(my_perl, xs_init, argc + 2, (char **)command_line,
484 (char **)NULL)) {
485 err = -1;
486 goto error;
487 }
488
489 if (perl_run(my_perl)) {
490 err = -1;
491 goto error;
492 }
493
494 if (SvTRUE(ERRSV)) {
495 err = -1;
496 goto error;
497 }
498
499 run_start_sub();
500
501 free(command_line);
502 return 0;
503error:
504 perl_free(my_perl);
505 free(command_line);
506
507 return err;
508}
509
510static int perl_flush_script(void)
511{
512 return 0;
513}
514
515/*
516 * Stop trace script
517 */
518static int perl_stop_script(void)
519{
520 dSP; /* access to Perl stack */
521 PUSHMARK(SP);
522
523 if (get_cv("main::trace_end", 0))
524 call_pv("main::trace_end", G_DISCARD | G_NOARGS);
525
526 perl_destruct(my_perl);
527 perl_free(my_perl);
528
529 return 0;
530}
531
532static int perl_generate_script(struct pevent *pevent, const char *outfile)
533{
534 struct event_format *event = NULL;
535 struct format_field *f;
536 char fname[PATH_MAX];
537 int not_first, count;
538 FILE *ofp;
539
540 sprintf(fname, "%s.pl", outfile);
541 ofp = fopen(fname, "w");
542 if (ofp == NULL) {
543 fprintf(stderr, "couldn't open %s\n", fname);
544 return -1;
545 }
546
547 fprintf(ofp, "# perf script event handlers, "
548 "generated by perf script -g perl\n");
549
550 fprintf(ofp, "# Licensed under the terms of the GNU GPL"
551 " License version 2\n\n");
552
553 fprintf(ofp, "# The common_* event handler fields are the most useful "
554 "fields common to\n");
555
556 fprintf(ofp, "# all events. They don't necessarily correspond to "
557 "the 'common_*' fields\n");
558
559 fprintf(ofp, "# in the format files. Those fields not available as "
560 "handler params can\n");
561
562 fprintf(ofp, "# be retrieved using Perl functions of the form "
563 "common_*($context).\n");
564
565 fprintf(ofp, "# See Context.pm for the list of available "
566 "functions.\n\n");
567
568 fprintf(ofp, "use lib \"$ENV{'PERF_EXEC_PATH'}/scripts/perl/"
569 "Perf-Trace-Util/lib\";\n");
570
571 fprintf(ofp, "use lib \"./Perf-Trace-Util/lib\";\n");
572 fprintf(ofp, "use Perf::Trace::Core;\n");
573 fprintf(ofp, "use Perf::Trace::Context;\n");
574 fprintf(ofp, "use Perf::Trace::Util;\n\n");
575
576 fprintf(ofp, "sub trace_begin\n{\n\t# optional\n}\n\n");
577 fprintf(ofp, "sub trace_end\n{\n\t# optional\n}\n");
578
579
580 fprintf(ofp, "\n\
581sub print_backtrace\n\
582{\n\
583 my $callchain = shift;\n\
584 for my $node (@$callchain)\n\
585 {\n\
586 if(exists $node->{sym})\n\
587 {\n\
588 printf( \"\\t[\\%%x] \\%%s\\n\", $node->{ip}, $node->{sym}{name});\n\
589 }\n\
590 else\n\
591 {\n\
592 printf( \"\\t[\\%%x]\\n\", $node{ip});\n\
593 }\n\
594 }\n\
595}\n\n\
596");
597
598
599 while ((event = trace_find_next_event(pevent, event))) {
600 fprintf(ofp, "sub %s::%s\n{\n", event->system, event->name);
601 fprintf(ofp, "\tmy (");
602
603 fprintf(ofp, "$event_name, ");
604 fprintf(ofp, "$context, ");
605 fprintf(ofp, "$common_cpu, ");
606 fprintf(ofp, "$common_secs, ");
607 fprintf(ofp, "$common_nsecs,\n");
608 fprintf(ofp, "\t $common_pid, ");
609 fprintf(ofp, "$common_comm, ");
610 fprintf(ofp, "$common_callchain,\n\t ");
611
612 not_first = 0;
613 count = 0;
614
615 for (f = event->format.fields; f; f = f->next) {
616 if (not_first++)
617 fprintf(ofp, ", ");
618 if (++count % 5 == 0)
619 fprintf(ofp, "\n\t ");
620
621 fprintf(ofp, "$%s", f->name);
622 }
623 fprintf(ofp, ") = @_;\n\n");
624
625 fprintf(ofp, "\tprint_header($event_name, $common_cpu, "
626 "$common_secs, $common_nsecs,\n\t "
627 "$common_pid, $common_comm, $common_callchain);\n\n");
628
629 fprintf(ofp, "\tprintf(\"");
630
631 not_first = 0;
632 count = 0;
633
634 for (f = event->format.fields; f; f = f->next) {
635 if (not_first++)
636 fprintf(ofp, ", ");
637 if (count && count % 4 == 0) {
638 fprintf(ofp, "\".\n\t \"");
639 }
640 count++;
641
642 fprintf(ofp, "%s=", f->name);
643 if (f->flags & FIELD_IS_STRING ||
644 f->flags & FIELD_IS_FLAG ||
645 f->flags & FIELD_IS_SYMBOLIC)
646 fprintf(ofp, "%%s");
647 else if (f->flags & FIELD_IS_SIGNED)
648 fprintf(ofp, "%%d");
649 else
650 fprintf(ofp, "%%u");
651 }
652
653 fprintf(ofp, "\\n\",\n\t ");
654
655 not_first = 0;
656 count = 0;
657
658 for (f = event->format.fields; f; f = f->next) {
659 if (not_first++)
660 fprintf(ofp, ", ");
661
662 if (++count % 5 == 0)
663 fprintf(ofp, "\n\t ");
664
665 if (f->flags & FIELD_IS_FLAG) {
666 if ((count - 1) % 5 != 0) {
667 fprintf(ofp, "\n\t ");
668 count = 4;
669 }
670 fprintf(ofp, "flag_str(\"");
671 fprintf(ofp, "%s::%s\", ", event->system,
672 event->name);
673 fprintf(ofp, "\"%s\", $%s)", f->name,
674 f->name);
675 } else if (f->flags & FIELD_IS_SYMBOLIC) {
676 if ((count - 1) % 5 != 0) {
677 fprintf(ofp, "\n\t ");
678 count = 4;
679 }
680 fprintf(ofp, "symbol_str(\"");
681 fprintf(ofp, "%s::%s\", ", event->system,
682 event->name);
683 fprintf(ofp, "\"%s\", $%s)", f->name,
684 f->name);
685 } else
686 fprintf(ofp, "$%s", f->name);
687 }
688
689 fprintf(ofp, ");\n\n");
690
691 fprintf(ofp, "\tprint_backtrace($common_callchain);\n");
692
693 fprintf(ofp, "}\n\n");
694 }
695
696 fprintf(ofp, "sub trace_unhandled\n{\n\tmy ($event_name, $context, "
697 "$common_cpu, $common_secs, $common_nsecs,\n\t "
698 "$common_pid, $common_comm, $common_callchain) = @_;\n\n");
699
700 fprintf(ofp, "\tprint_header($event_name, $common_cpu, "
701 "$common_secs, $common_nsecs,\n\t $common_pid, "
702 "$common_comm, $common_callchain);\n");
703 fprintf(ofp, "\tprint_backtrace($common_callchain);\n");
704 fprintf(ofp, "}\n\n");
705
706 fprintf(ofp, "sub print_header\n{\n"
707 "\tmy ($event_name, $cpu, $secs, $nsecs, $pid, $comm) = @_;\n\n"
708 "\tprintf(\"%%-20s %%5u %%05u.%%09u %%8u %%-20s \",\n\t "
709 "$event_name, $cpu, $secs, $nsecs, $pid, $comm);\n}\n");
710
711 fprintf(ofp,
712 "\n# Packed byte string args of process_event():\n"
713 "#\n"
714 "# $event:\tunion perf_event\tutil/event.h\n"
715 "# $attr:\tstruct perf_event_attr\tlinux/perf_event.h\n"
716 "# $sample:\tstruct perf_sample\tutil/event.h\n"
717 "# $raw_data:\tperf_sample->raw_data\tutil/event.h\n"
718 "\n"
719 "sub process_event\n"
720 "{\n"
721 "\tmy ($event, $attr, $sample, $raw_data) = @_;\n"
722 "\n"
723 "\tmy @event\t= unpack(\"LSS\", $event);\n"
724 "\tmy @attr\t= unpack(\"LLQQQQQLLQQ\", $attr);\n"
725 "\tmy @sample\t= unpack(\"QLLQQQQQLL\", $sample);\n"
726 "\tmy @raw_data\t= unpack(\"C*\", $raw_data);\n"
727 "\n"
728 "\tuse Data::Dumper;\n"
729 "\tprint Dumper \\@event, \\@attr, \\@sample, \\@raw_data;\n"
730 "}\n");
731
732 fclose(ofp);
733
734 fprintf(stderr, "generated Perl script: %s\n", fname);
735
736 return 0;
737}
738
739struct scripting_ops perl_scripting_ops = {
740 .name = "Perl",
741 .start_script = perl_start_script,
742 .flush_script = perl_flush_script,
743 .stop_script = perl_stop_script,
744 .process_event = perl_process_event,
745 .generate_script = perl_generate_script,
746};
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 <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
49void boot_Perf__Trace__Context(pTHX_ CV *cv);
50void boot_DynaLoader(pTHX_ CV *cv);
51typedef PerlInterpreter * INTERP;
52
53void xs_init(pTHX);
54
55void 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
65INTERP my_perl;
66
67#define TRACE_EVENT_TYPE_MAX \
68 ((1 << (sizeof(unsigned short) * 8)) - 1)
69
70extern struct scripting_context *scripting_context;
71
72static char *cur_field_name;
73static int zero_flag_atom;
74
75static 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
103static 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
112static 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
133static 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
161static 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
170static 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
193static 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
259static 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(dso))
324 dsoname = dso__long_name(dso);
325 else
326 dsoname = dso__name(dso);
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
338exit:
339 return newRV_noinc((SV*)list);
340}
341
342static 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
437static 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
461static 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
472static 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 */
484static 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 if (!command_line)
494 return -ENOMEM;
495
496 command_line[0] = "";
497 command_line[1] = script;
498 for (i = 2; i < argc + 2; i++)
499 command_line[i] = argv[i - 2];
500
501 my_perl = perl_alloc();
502 perl_construct(my_perl);
503
504 if (perl_parse(my_perl, xs_init, argc + 2, (char **)command_line,
505 (char **)NULL)) {
506 err = -1;
507 goto error;
508 }
509
510 if (perl_run(my_perl)) {
511 err = -1;
512 goto error;
513 }
514
515 if (SvTRUE(ERRSV)) {
516 err = -1;
517 goto error;
518 }
519
520 run_start_sub();
521
522 free(command_line);
523 return 0;
524error:
525 perl_free(my_perl);
526 free(command_line);
527
528 return err;
529}
530
531static int perl_flush_script(void)
532{
533 return 0;
534}
535
536/*
537 * Stop trace script
538 */
539static int perl_stop_script(void)
540{
541 dSP; /* access to Perl stack */
542 PUSHMARK(SP);
543
544 if (get_cv("main::trace_end", 0))
545 call_pv("main::trace_end", G_DISCARD | G_NOARGS);
546
547 perl_destruct(my_perl);
548 perl_free(my_perl);
549
550 return 0;
551}
552
553static int perl_generate_script(struct tep_handle *pevent, const char *outfile)
554{
555 int i, not_first, count, nr_events;
556 struct tep_event **all_events;
557 struct tep_event *event = NULL;
558 struct tep_format_field *f;
559 char fname[PATH_MAX];
560 FILE *ofp;
561
562 sprintf(fname, "%s.pl", outfile);
563 ofp = fopen(fname, "w");
564 if (ofp == NULL) {
565 fprintf(stderr, "couldn't open %s\n", fname);
566 return -1;
567 }
568
569 fprintf(ofp, "# perf script event handlers, "
570 "generated by perf script -g perl\n");
571
572 fprintf(ofp, "# Licensed under the terms of the GNU GPL"
573 " License version 2\n\n");
574
575 fprintf(ofp, "# The common_* event handler fields are the most useful "
576 "fields common to\n");
577
578 fprintf(ofp, "# all events. They don't necessarily correspond to "
579 "the 'common_*' fields\n");
580
581 fprintf(ofp, "# in the format files. Those fields not available as "
582 "handler params can\n");
583
584 fprintf(ofp, "# be retrieved using Perl functions of the form "
585 "common_*($context).\n");
586
587 fprintf(ofp, "# See Context.pm for the list of available "
588 "functions.\n\n");
589
590 fprintf(ofp, "use lib \"$ENV{'PERF_EXEC_PATH'}/scripts/perl/"
591 "Perf-Trace-Util/lib\";\n");
592
593 fprintf(ofp, "use lib \"./Perf-Trace-Util/lib\";\n");
594 fprintf(ofp, "use Perf::Trace::Core;\n");
595 fprintf(ofp, "use Perf::Trace::Context;\n");
596 fprintf(ofp, "use Perf::Trace::Util;\n\n");
597
598 fprintf(ofp, "sub trace_begin\n{\n\t# optional\n}\n\n");
599 fprintf(ofp, "sub trace_end\n{\n\t# optional\n}\n");
600
601
602 fprintf(ofp, "\n\
603sub print_backtrace\n\
604{\n\
605 my $callchain = shift;\n\
606 for my $node (@$callchain)\n\
607 {\n\
608 if(exists $node->{sym})\n\
609 {\n\
610 printf( \"\\t[\\%%x] \\%%s\\n\", $node->{ip}, $node->{sym}{name});\n\
611 }\n\
612 else\n\
613 {\n\
614 printf( \"\\t[\\%%x]\\n\", $node{ip});\n\
615 }\n\
616 }\n\
617}\n\n\
618");
619
620 nr_events = tep_get_events_count(pevent);
621 all_events = tep_list_events(pevent, TEP_EVENT_SORT_ID);
622
623 for (i = 0; all_events && i < nr_events; i++) {
624 event = all_events[i];
625 fprintf(ofp, "sub %s::%s\n{\n", event->system, event->name);
626 fprintf(ofp, "\tmy (");
627
628 fprintf(ofp, "$event_name, ");
629 fprintf(ofp, "$context, ");
630 fprintf(ofp, "$common_cpu, ");
631 fprintf(ofp, "$common_secs, ");
632 fprintf(ofp, "$common_nsecs,\n");
633 fprintf(ofp, "\t $common_pid, ");
634 fprintf(ofp, "$common_comm, ");
635 fprintf(ofp, "$common_callchain,\n\t ");
636
637 not_first = 0;
638 count = 0;
639
640 for (f = event->format.fields; f; f = f->next) {
641 if (not_first++)
642 fprintf(ofp, ", ");
643 if (++count % 5 == 0)
644 fprintf(ofp, "\n\t ");
645
646 fprintf(ofp, "$%s", f->name);
647 }
648 fprintf(ofp, ") = @_;\n\n");
649
650 fprintf(ofp, "\tprint_header($event_name, $common_cpu, "
651 "$common_secs, $common_nsecs,\n\t "
652 "$common_pid, $common_comm, $common_callchain);\n\n");
653
654 fprintf(ofp, "\tprintf(\"");
655
656 not_first = 0;
657 count = 0;
658
659 for (f = event->format.fields; f; f = f->next) {
660 if (not_first++)
661 fprintf(ofp, ", ");
662 if (count && count % 4 == 0) {
663 fprintf(ofp, "\".\n\t \"");
664 }
665 count++;
666
667 fprintf(ofp, "%s=", f->name);
668 if (f->flags & TEP_FIELD_IS_STRING ||
669 f->flags & TEP_FIELD_IS_FLAG ||
670 f->flags & TEP_FIELD_IS_SYMBOLIC)
671 fprintf(ofp, "%%s");
672 else if (f->flags & TEP_FIELD_IS_SIGNED)
673 fprintf(ofp, "%%d");
674 else
675 fprintf(ofp, "%%u");
676 }
677
678 fprintf(ofp, "\\n\",\n\t ");
679
680 not_first = 0;
681 count = 0;
682
683 for (f = event->format.fields; f; f = f->next) {
684 if (not_first++)
685 fprintf(ofp, ", ");
686
687 if (++count % 5 == 0)
688 fprintf(ofp, "\n\t ");
689
690 if (f->flags & TEP_FIELD_IS_FLAG) {
691 if ((count - 1) % 5 != 0) {
692 fprintf(ofp, "\n\t ");
693 count = 4;
694 }
695 fprintf(ofp, "flag_str(\"");
696 fprintf(ofp, "%s::%s\", ", event->system,
697 event->name);
698 fprintf(ofp, "\"%s\", $%s)", f->name,
699 f->name);
700 } else if (f->flags & TEP_FIELD_IS_SYMBOLIC) {
701 if ((count - 1) % 5 != 0) {
702 fprintf(ofp, "\n\t ");
703 count = 4;
704 }
705 fprintf(ofp, "symbol_str(\"");
706 fprintf(ofp, "%s::%s\", ", event->system,
707 event->name);
708 fprintf(ofp, "\"%s\", $%s)", f->name,
709 f->name);
710 } else
711 fprintf(ofp, "$%s", f->name);
712 }
713
714 fprintf(ofp, ");\n\n");
715
716 fprintf(ofp, "\tprint_backtrace($common_callchain);\n");
717
718 fprintf(ofp, "}\n\n");
719 }
720
721 fprintf(ofp, "sub trace_unhandled\n{\n\tmy ($event_name, $context, "
722 "$common_cpu, $common_secs, $common_nsecs,\n\t "
723 "$common_pid, $common_comm, $common_callchain) = @_;\n\n");
724
725 fprintf(ofp, "\tprint_header($event_name, $common_cpu, "
726 "$common_secs, $common_nsecs,\n\t $common_pid, "
727 "$common_comm, $common_callchain);\n");
728 fprintf(ofp, "\tprint_backtrace($common_callchain);\n");
729 fprintf(ofp, "}\n\n");
730
731 fprintf(ofp, "sub print_header\n{\n"
732 "\tmy ($event_name, $cpu, $secs, $nsecs, $pid, $comm) = @_;\n\n"
733 "\tprintf(\"%%-20s %%5u %%05u.%%09u %%8u %%-20s \",\n\t "
734 "$event_name, $cpu, $secs, $nsecs, $pid, $comm);\n}\n");
735
736 fprintf(ofp,
737 "\n# Packed byte string args of process_event():\n"
738 "#\n"
739 "# $event:\tunion perf_event\tutil/event.h\n"
740 "# $attr:\tstruct perf_event_attr\tlinux/perf_event.h\n"
741 "# $sample:\tstruct perf_sample\tutil/event.h\n"
742 "# $raw_data:\tperf_sample->raw_data\tutil/event.h\n"
743 "\n"
744 "sub process_event\n"
745 "{\n"
746 "\tmy ($event, $attr, $sample, $raw_data) = @_;\n"
747 "\n"
748 "\tmy @event\t= unpack(\"LSS\", $event);\n"
749 "\tmy @attr\t= unpack(\"LLQQQQQLLQQ\", $attr);\n"
750 "\tmy @sample\t= unpack(\"QLLQQQQQLL\", $sample);\n"
751 "\tmy @raw_data\t= unpack(\"C*\", $raw_data);\n"
752 "\n"
753 "\tuse Data::Dumper;\n"
754 "\tprint Dumper \\@event, \\@attr, \\@sample, \\@raw_data;\n"
755 "}\n");
756
757 fclose(ofp);
758
759 fprintf(stderr, "generated Perl script: %s\n", fname);
760
761 return 0;
762}
763
764struct scripting_ops perl_scripting_ops = {
765 .name = "Perl",
766 .dirname = "perl",
767 .start_script = perl_start_script,
768 .flush_script = perl_flush_script,
769 .stop_script = perl_stop_script,
770 .process_event = perl_process_event,
771 .generate_script = perl_generate_script,
772};