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