2 * trace-event-perl. Feed perf script events to an embedded Perl interpreter.
4 * Copyright (C) 2009 Tom Zanussi <tzanussi@gmail.com>
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.
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.
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
32 #include "../../perf.h"
33 #include "../thread.h"
35 #include "../trace-event.h"
38 void boot_Perf__Trace__Context(pTHX_ CV *cv);
39 void boot_DynaLoader(pTHX_ CV *cv);
40 typedef PerlInterpreter * INTERP;
46 const char *file = __FILE__;
49 newXS("Perf::Trace::Context::bootstrap", boot_Perf__Trace__Context,
51 newXS("DynaLoader::boot_DynaLoader", boot_DynaLoader, file);
56 #define FTRACE_MAX_EVENT \
57 ((1 << (sizeof(unsigned short) * 8)) - 1)
59 struct event_format *events[FTRACE_MAX_EVENT];
61 extern struct scripting_context *scripting_context;
63 static char *cur_field_name;
64 static int zero_flag_atom;
66 static void define_symbolic_value(const char *ev_name,
67 const char *field_name,
68 const char *field_value,
69 const char *field_str)
71 unsigned long long value;
74 value = eval_flag(field_value);
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)));
86 if (get_cv("main::define_symbolic_value", 0))
87 call_pv("main::define_symbolic_value", G_SCALAR);
94 static void define_symbolic_values(struct print_flag_sym *field,
96 const char *field_name)
98 define_symbolic_value(ev_name, field_name, field->value, field->str);
100 define_symbolic_values(field->next, ev_name, field_name);
103 static void define_symbolic_field(const char *ev_name,
104 const char *field_name)
112 XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
113 XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
116 if (get_cv("main::define_symbolic_field", 0))
117 call_pv("main::define_symbolic_field", G_SCALAR);
124 static void define_flag_value(const char *ev_name,
125 const char *field_name,
126 const char *field_value,
127 const char *field_str)
129 unsigned long long value;
132 value = eval_flag(field_value);
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)));
144 if (get_cv("main::define_flag_value", 0))
145 call_pv("main::define_flag_value", G_SCALAR);
152 static void define_flag_values(struct print_flag_sym *field,
154 const char *field_name)
156 define_flag_value(ev_name, field_name, field->value, field->str);
158 define_flag_values(field->next, ev_name, field_name);
161 static void define_flag_field(const char *ev_name,
162 const char *field_name,
171 XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
172 XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
173 XPUSHs(sv_2mortal(newSVpv(delim, 0)));
176 if (get_cv("main::define_flag_field", 0))
177 call_pv("main::define_flag_field", G_SCALAR);
184 static void define_event_symbols(struct event_format *event,
186 struct print_arg *args)
188 switch (args->type) {
192 define_flag_value(ev_name, cur_field_name, "0",
198 free(cur_field_name);
199 cur_field_name = strdup(args->field.name);
202 define_event_symbols(event, ev_name, args->flags.field);
203 define_flag_field(ev_name, cur_field_name, args->flags.delim);
204 define_flag_values(args->flags.flags, ev_name, cur_field_name);
207 define_event_symbols(event, ev_name, args->symbol.field);
208 define_symbolic_field(ev_name, cur_field_name);
209 define_symbolic_values(args->symbol.symbols, ev_name,
213 define_event_symbols(event, ev_name, args->hex.field);
214 define_event_symbols(event, ev_name, args->hex.size);
217 case PRINT_DYNAMIC_ARRAY:
221 define_event_symbols(event, ev_name, args->typecast.item);
224 if (strcmp(args->op.op, ":") == 0)
226 define_event_symbols(event, ev_name, args->op.left);
227 define_event_symbols(event, ev_name, args->op.right);
231 pr_err("Unsupported print arg type\n");
232 /* we should warn... */
237 define_event_symbols(event, ev_name, args->next);
240 static inline struct event_format *find_cache_event(struct perf_evsel *evsel)
242 static char ev_name[256];
243 struct event_format *event;
244 int type = evsel->attr.config;
249 events[type] = event = evsel->tp_format;
253 sprintf(ev_name, "%s::%s", event->system, event->name);
255 define_event_symbols(event, ev_name, event->print_fmt.args);
260 static void perl_process_tracepoint(union perf_event *perf_event __maybe_unused,
261 struct perf_sample *sample,
262 struct perf_evsel *evsel,
263 struct machine *machine __maybe_unused,
264 struct addr_location *al)
266 struct format_field *field;
267 static char handler[256];
268 unsigned long long val;
270 struct event_format *event;
272 int cpu = sample->cpu;
273 void *data = sample->raw_data;
274 unsigned long long nsecs = sample->time;
275 struct thread *thread = al->thread;
276 char *comm = thread->comm;
280 if (evsel->attr.type != PERF_TYPE_TRACEPOINT)
283 event = find_cache_event(evsel);
285 die("ug! no event found for type %" PRIu64, evsel->attr.config);
287 pid = raw_field_value(event, "common_pid", data);
289 sprintf(handler, "%s::%s", event->system, event->name);
291 s = nsecs / NSECS_PER_SEC;
292 ns = nsecs - s * NSECS_PER_SEC;
294 scripting_context->event_data = data;
295 scripting_context->pevent = evsel->tp_format->pevent;
301 XPUSHs(sv_2mortal(newSVpv(handler, 0)));
302 XPUSHs(sv_2mortal(newSViv(PTR2IV(scripting_context))));
303 XPUSHs(sv_2mortal(newSVuv(cpu)));
304 XPUSHs(sv_2mortal(newSVuv(s)));
305 XPUSHs(sv_2mortal(newSVuv(ns)));
306 XPUSHs(sv_2mortal(newSViv(pid)));
307 XPUSHs(sv_2mortal(newSVpv(comm, 0)));
309 /* common fields other than pid can be accessed via xsub fns */
311 for (field = event->format.fields; field; field = field->next) {
312 if (field->flags & FIELD_IS_STRING) {
314 if (field->flags & FIELD_IS_DYNAMIC) {
315 offset = *(int *)(data + field->offset);
318 offset = field->offset;
319 XPUSHs(sv_2mortal(newSVpv((char *)data + offset, 0)));
320 } else { /* FIELD_IS_NUMERIC */
321 val = read_size(event, data + field->offset,
323 if (field->flags & FIELD_IS_SIGNED) {
324 XPUSHs(sv_2mortal(newSViv(val)));
326 XPUSHs(sv_2mortal(newSVuv(val)));
333 if (get_cv(handler, 0))
334 call_pv(handler, G_SCALAR);
335 else if (get_cv("main::trace_unhandled", 0)) {
336 XPUSHs(sv_2mortal(newSVpv(handler, 0)));
337 XPUSHs(sv_2mortal(newSViv(PTR2IV(scripting_context))));
338 XPUSHs(sv_2mortal(newSVuv(cpu)));
339 XPUSHs(sv_2mortal(newSVuv(nsecs)));
340 XPUSHs(sv_2mortal(newSViv(pid)));
341 XPUSHs(sv_2mortal(newSVpv(comm, 0)));
342 call_pv("main::trace_unhandled", G_SCALAR);
350 static void perl_process_event_generic(union perf_event *event,
351 struct perf_sample *sample,
352 struct perf_evsel *evsel,
353 struct machine *machine __maybe_unused,
354 struct addr_location *al __maybe_unused)
358 if (!get_cv("process_event", 0))
364 XPUSHs(sv_2mortal(newSVpvn((const char *)event, event->header.size)));
365 XPUSHs(sv_2mortal(newSVpvn((const char *)&evsel->attr, sizeof(evsel->attr))));
366 XPUSHs(sv_2mortal(newSVpvn((const char *)sample, sizeof(*sample))));
367 XPUSHs(sv_2mortal(newSVpvn((const char *)sample->raw_data, sample->raw_size)));
369 call_pv("process_event", G_SCALAR);
376 static void perl_process_event(union perf_event *event,
377 struct perf_sample *sample,
378 struct perf_evsel *evsel,
379 struct machine *machine,
380 struct addr_location *al)
382 perl_process_tracepoint(event, sample, evsel, machine, al);
383 perl_process_event_generic(event, sample, evsel, machine, al);
386 static void run_start_sub(void)
388 dSP; /* access to Perl stack */
391 if (get_cv("main::trace_begin", 0))
392 call_pv("main::trace_begin", G_DISCARD | G_NOARGS);
398 static int perl_start_script(const char *script, int argc, const char **argv)
400 const char **command_line;
403 command_line = malloc((argc + 2) * sizeof(const char *));
404 command_line[0] = "";
405 command_line[1] = script;
406 for (i = 2; i < argc + 2; i++)
407 command_line[i] = argv[i - 2];
409 my_perl = perl_alloc();
410 perl_construct(my_perl);
412 if (perl_parse(my_perl, xs_init, argc + 2, (char **)command_line,
418 if (perl_run(my_perl)) {
442 static int perl_stop_script(void)
444 dSP; /* access to Perl stack */
447 if (get_cv("main::trace_end", 0))
448 call_pv("main::trace_end", G_DISCARD | G_NOARGS);
450 perl_destruct(my_perl);
456 static int perl_generate_script(struct pevent *pevent, const char *outfile)
458 struct event_format *event = NULL;
459 struct format_field *f;
460 char fname[PATH_MAX];
461 int not_first, count;
464 sprintf(fname, "%s.pl", outfile);
465 ofp = fopen(fname, "w");
467 fprintf(stderr, "couldn't open %s\n", fname);
471 fprintf(ofp, "# perf script event handlers, "
472 "generated by perf script -g perl\n");
474 fprintf(ofp, "# Licensed under the terms of the GNU GPL"
475 " License version 2\n\n");
477 fprintf(ofp, "# The common_* event handler fields are the most useful "
478 "fields common to\n");
480 fprintf(ofp, "# all events. They don't necessarily correspond to "
481 "the 'common_*' fields\n");
483 fprintf(ofp, "# in the format files. Those fields not available as "
484 "handler params can\n");
486 fprintf(ofp, "# be retrieved using Perl functions of the form "
487 "common_*($context).\n");
489 fprintf(ofp, "# See Context.pm for the list of available "
492 fprintf(ofp, "use lib \"$ENV{'PERF_EXEC_PATH'}/scripts/perl/"
493 "Perf-Trace-Util/lib\";\n");
495 fprintf(ofp, "use lib \"./Perf-Trace-Util/lib\";\n");
496 fprintf(ofp, "use Perf::Trace::Core;\n");
497 fprintf(ofp, "use Perf::Trace::Context;\n");
498 fprintf(ofp, "use Perf::Trace::Util;\n\n");
500 fprintf(ofp, "sub trace_begin\n{\n\t# optional\n}\n\n");
501 fprintf(ofp, "sub trace_end\n{\n\t# optional\n}\n\n");
503 while ((event = trace_find_next_event(pevent, event))) {
504 fprintf(ofp, "sub %s::%s\n{\n", event->system, event->name);
505 fprintf(ofp, "\tmy (");
507 fprintf(ofp, "$event_name, ");
508 fprintf(ofp, "$context, ");
509 fprintf(ofp, "$common_cpu, ");
510 fprintf(ofp, "$common_secs, ");
511 fprintf(ofp, "$common_nsecs,\n");
512 fprintf(ofp, "\t $common_pid, ");
513 fprintf(ofp, "$common_comm,\n\t ");
518 for (f = event->format.fields; f; f = f->next) {
521 if (++count % 5 == 0)
522 fprintf(ofp, "\n\t ");
524 fprintf(ofp, "$%s", f->name);
526 fprintf(ofp, ") = @_;\n\n");
528 fprintf(ofp, "\tprint_header($event_name, $common_cpu, "
529 "$common_secs, $common_nsecs,\n\t "
530 "$common_pid, $common_comm);\n\n");
532 fprintf(ofp, "\tprintf(\"");
537 for (f = event->format.fields; f; f = f->next) {
540 if (count && count % 4 == 0) {
541 fprintf(ofp, "\".\n\t \"");
545 fprintf(ofp, "%s=", f->name);
546 if (f->flags & FIELD_IS_STRING ||
547 f->flags & FIELD_IS_FLAG ||
548 f->flags & FIELD_IS_SYMBOLIC)
550 else if (f->flags & FIELD_IS_SIGNED)
556 fprintf(ofp, "\\n\",\n\t ");
561 for (f = event->format.fields; f; f = f->next) {
565 if (++count % 5 == 0)
566 fprintf(ofp, "\n\t ");
568 if (f->flags & FIELD_IS_FLAG) {
569 if ((count - 1) % 5 != 0) {
570 fprintf(ofp, "\n\t ");
573 fprintf(ofp, "flag_str(\"");
574 fprintf(ofp, "%s::%s\", ", event->system,
576 fprintf(ofp, "\"%s\", $%s)", f->name,
578 } else if (f->flags & FIELD_IS_SYMBOLIC) {
579 if ((count - 1) % 5 != 0) {
580 fprintf(ofp, "\n\t ");
583 fprintf(ofp, "symbol_str(\"");
584 fprintf(ofp, "%s::%s\", ", event->system,
586 fprintf(ofp, "\"%s\", $%s)", f->name,
589 fprintf(ofp, "$%s", f->name);
592 fprintf(ofp, ");\n");
593 fprintf(ofp, "}\n\n");
596 fprintf(ofp, "sub trace_unhandled\n{\n\tmy ($event_name, $context, "
597 "$common_cpu, $common_secs, $common_nsecs,\n\t "
598 "$common_pid, $common_comm) = @_;\n\n");
600 fprintf(ofp, "\tprint_header($event_name, $common_cpu, "
601 "$common_secs, $common_nsecs,\n\t $common_pid, "
602 "$common_comm);\n}\n\n");
604 fprintf(ofp, "sub print_header\n{\n"
605 "\tmy ($event_name, $cpu, $secs, $nsecs, $pid, $comm) = @_;\n\n"
606 "\tprintf(\"%%-20s %%5u %%05u.%%09u %%8u %%-20s \",\n\t "
607 "$event_name, $cpu, $secs, $nsecs, $pid, $comm);\n}\n");
610 "\n# Packed byte string args of process_event():\n"
612 "# $event:\tunion perf_event\tutil/event.h\n"
613 "# $attr:\tstruct perf_event_attr\tlinux/perf_event.h\n"
614 "# $sample:\tstruct perf_sample\tutil/event.h\n"
615 "# $raw_data:\tperf_sample->raw_data\tutil/event.h\n"
617 "sub process_event\n"
619 "\tmy ($event, $attr, $sample, $raw_data) = @_;\n"
621 "\tmy @event\t= unpack(\"LSS\", $event);\n"
622 "\tmy @attr\t= unpack(\"LLQQQQQLLQQ\", $attr);\n"
623 "\tmy @sample\t= unpack(\"QLLQQQQQLL\", $sample);\n"
624 "\tmy @raw_data\t= unpack(\"C*\", $raw_data);\n"
626 "\tuse Data::Dumper;\n"
627 "\tprint Dumper \\@event, \\@attr, \\@sample, \\@raw_data;\n"
632 fprintf(stderr, "generated Perl script: %s\n", fname);
637 struct scripting_ops perl_scripting_ops = {
639 .start_script = perl_start_script,
640 .stop_script = perl_stop_script,
641 .process_event = perl_process_event,
642 .generate_script = perl_generate_script,