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
28 #include "../../perf.h"
30 #include "../trace-event.h"
35 void boot_Perf__Trace__Context(pTHX_ CV *cv);
36 void boot_DynaLoader(pTHX_ CV *cv);
37 typedef PerlInterpreter * INTERP;
43 const char *file = __FILE__;
46 newXS("Perf::Trace::Context::bootstrap", boot_Perf__Trace__Context,
48 newXS("DynaLoader::boot_DynaLoader", boot_DynaLoader, file);
53 #define FTRACE_MAX_EVENT \
54 ((1 << (sizeof(unsigned short) * 8)) - 1)
56 struct event *events[FTRACE_MAX_EVENT];
58 extern struct scripting_context *scripting_context;
60 static char *cur_field_name;
61 static int zero_flag_atom;
63 static void define_symbolic_value(const char *ev_name,
64 const char *field_name,
65 const char *field_value,
66 const char *field_str)
68 unsigned long long value;
71 value = eval_flag(field_value);
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)));
83 if (get_cv("main::define_symbolic_value", 0))
84 call_pv("main::define_symbolic_value", G_SCALAR);
91 static void define_symbolic_values(struct print_flag_sym *field,
93 const char *field_name)
95 define_symbolic_value(ev_name, field_name, field->value, field->str);
97 define_symbolic_values(field->next, ev_name, field_name);
100 static void define_symbolic_field(const char *ev_name,
101 const char *field_name)
109 XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
110 XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
113 if (get_cv("main::define_symbolic_field", 0))
114 call_pv("main::define_symbolic_field", G_SCALAR);
121 static void define_flag_value(const char *ev_name,
122 const char *field_name,
123 const char *field_value,
124 const char *field_str)
126 unsigned long long value;
129 value = eval_flag(field_value);
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)));
141 if (get_cv("main::define_flag_value", 0))
142 call_pv("main::define_flag_value", G_SCALAR);
149 static void define_flag_values(struct print_flag_sym *field,
151 const char *field_name)
153 define_flag_value(ev_name, field_name, field->value, field->str);
155 define_flag_values(field->next, ev_name, field_name);
158 static void define_flag_field(const char *ev_name,
159 const char *field_name,
168 XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
169 XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
170 XPUSHs(sv_2mortal(newSVpv(delim, 0)));
173 if (get_cv("main::define_flag_field", 0))
174 call_pv("main::define_flag_field", G_SCALAR);
181 static void define_event_symbols(struct event *event,
183 struct print_arg *args)
185 switch (args->type) {
189 define_flag_value(ev_name, cur_field_name, "0",
195 free(cur_field_name);
196 cur_field_name = strdup(args->field.name);
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);
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,
212 define_event_symbols(event, ev_name, args->typecast.item);
215 if (strcmp(args->op.op, ":") == 0)
217 define_event_symbols(event, ev_name, args->op.left);
218 define_event_symbols(event, ev_name, args->op.right);
221 /* we should warn... */
226 define_event_symbols(event, ev_name, args->next);
229 static inline struct event *find_cache_event(int type)
231 static char ev_name[256];
237 events[type] = event = trace_find_event(type);
241 sprintf(ev_name, "%s::%s", event->system, event->name);
243 define_event_symbols(event, ev_name, event->print_fmt.args);
248 static void perl_process_event(union perf_event *pevent __unused,
249 struct perf_sample *sample,
250 struct perf_session *session __unused,
251 struct thread *thread)
253 struct format_field *field;
254 static char handler[256];
255 unsigned long long val;
260 int cpu = sample->cpu;
261 void *data = sample->raw_data;
262 unsigned long long nsecs = sample->time;
263 char *comm = thread->comm;
267 type = trace_parse_common_type(data);
269 event = find_cache_event(type);
271 die("ug! no event found for type %d", type);
273 pid = trace_parse_common_pid(data);
275 sprintf(handler, "%s::%s", event->system, event->name);
277 s = nsecs / NSECS_PER_SEC;
278 ns = nsecs - s * NSECS_PER_SEC;
280 scripting_context->event_data = data;
286 XPUSHs(sv_2mortal(newSVpv(handler, 0)));
287 XPUSHs(sv_2mortal(newSViv(PTR2IV(scripting_context))));
288 XPUSHs(sv_2mortal(newSVuv(cpu)));
289 XPUSHs(sv_2mortal(newSVuv(s)));
290 XPUSHs(sv_2mortal(newSVuv(ns)));
291 XPUSHs(sv_2mortal(newSViv(pid)));
292 XPUSHs(sv_2mortal(newSVpv(comm, 0)));
294 /* common fields other than pid can be accessed via xsub fns */
296 for (field = event->format.fields; field; field = field->next) {
297 if (field->flags & FIELD_IS_STRING) {
299 if (field->flags & FIELD_IS_DYNAMIC) {
300 offset = *(int *)(data + field->offset);
303 offset = field->offset;
304 XPUSHs(sv_2mortal(newSVpv((char *)data + offset, 0)));
305 } else { /* FIELD_IS_NUMERIC */
306 val = read_size(data + field->offset, field->size);
307 if (field->flags & FIELD_IS_SIGNED) {
308 XPUSHs(sv_2mortal(newSViv(val)));
310 XPUSHs(sv_2mortal(newSVuv(val)));
317 if (get_cv(handler, 0))
318 call_pv(handler, G_SCALAR);
319 else if (get_cv("main::trace_unhandled", 0)) {
320 XPUSHs(sv_2mortal(newSVpv(handler, 0)));
321 XPUSHs(sv_2mortal(newSViv(PTR2IV(scripting_context))));
322 XPUSHs(sv_2mortal(newSVuv(cpu)));
323 XPUSHs(sv_2mortal(newSVuv(nsecs)));
324 XPUSHs(sv_2mortal(newSViv(pid)));
325 XPUSHs(sv_2mortal(newSVpv(comm, 0)));
326 call_pv("main::trace_unhandled", G_SCALAR);
334 static void run_start_sub(void)
336 dSP; /* access to Perl stack */
339 if (get_cv("main::trace_begin", 0))
340 call_pv("main::trace_begin", G_DISCARD | G_NOARGS);
346 static int perl_start_script(const char *script, int argc, const char **argv)
348 const char **command_line;
351 command_line = malloc((argc + 2) * sizeof(const char *));
352 command_line[0] = "";
353 command_line[1] = script;
354 for (i = 2; i < argc + 2; i++)
355 command_line[i] = argv[i - 2];
357 my_perl = perl_alloc();
358 perl_construct(my_perl);
360 if (perl_parse(my_perl, xs_init, argc + 2, (char **)command_line,
366 if (perl_run(my_perl)) {
390 static int perl_stop_script(void)
392 dSP; /* access to Perl stack */
395 if (get_cv("main::trace_end", 0))
396 call_pv("main::trace_end", G_DISCARD | G_NOARGS);
398 perl_destruct(my_perl);
404 static int perl_generate_script(const char *outfile)
406 struct event *event = NULL;
407 struct format_field *f;
408 char fname[PATH_MAX];
409 int not_first, count;
412 sprintf(fname, "%s.pl", outfile);
413 ofp = fopen(fname, "w");
415 fprintf(stderr, "couldn't open %s\n", fname);
419 fprintf(ofp, "# perf script event handlers, "
420 "generated by perf script -g perl\n");
422 fprintf(ofp, "# Licensed under the terms of the GNU GPL"
423 " License version 2\n\n");
425 fprintf(ofp, "# The common_* event handler fields are the most useful "
426 "fields common to\n");
428 fprintf(ofp, "# all events. They don't necessarily correspond to "
429 "the 'common_*' fields\n");
431 fprintf(ofp, "# in the format files. Those fields not available as "
432 "handler params can\n");
434 fprintf(ofp, "# be retrieved using Perl functions of the form "
435 "common_*($context).\n");
437 fprintf(ofp, "# See Context.pm for the list of available "
440 fprintf(ofp, "use lib \"$ENV{'PERF_EXEC_PATH'}/scripts/perl/"
441 "Perf-Trace-Util/lib\";\n");
443 fprintf(ofp, "use lib \"./Perf-Trace-Util/lib\";\n");
444 fprintf(ofp, "use Perf::Trace::Core;\n");
445 fprintf(ofp, "use Perf::Trace::Context;\n");
446 fprintf(ofp, "use Perf::Trace::Util;\n\n");
448 fprintf(ofp, "sub trace_begin\n{\n\t# optional\n}\n\n");
449 fprintf(ofp, "sub trace_end\n{\n\t# optional\n}\n\n");
451 while ((event = trace_find_next_event(event))) {
452 fprintf(ofp, "sub %s::%s\n{\n", event->system, event->name);
453 fprintf(ofp, "\tmy (");
455 fprintf(ofp, "$event_name, ");
456 fprintf(ofp, "$context, ");
457 fprintf(ofp, "$common_cpu, ");
458 fprintf(ofp, "$common_secs, ");
459 fprintf(ofp, "$common_nsecs,\n");
460 fprintf(ofp, "\t $common_pid, ");
461 fprintf(ofp, "$common_comm,\n\t ");
466 for (f = event->format.fields; f; f = f->next) {
469 if (++count % 5 == 0)
470 fprintf(ofp, "\n\t ");
472 fprintf(ofp, "$%s", f->name);
474 fprintf(ofp, ") = @_;\n\n");
476 fprintf(ofp, "\tprint_header($event_name, $common_cpu, "
477 "$common_secs, $common_nsecs,\n\t "
478 "$common_pid, $common_comm);\n\n");
480 fprintf(ofp, "\tprintf(\"");
485 for (f = event->format.fields; f; f = f->next) {
488 if (count && count % 4 == 0) {
489 fprintf(ofp, "\".\n\t \"");
493 fprintf(ofp, "%s=", f->name);
494 if (f->flags & FIELD_IS_STRING ||
495 f->flags & FIELD_IS_FLAG ||
496 f->flags & FIELD_IS_SYMBOLIC)
498 else if (f->flags & FIELD_IS_SIGNED)
504 fprintf(ofp, "\\n\",\n\t ");
509 for (f = event->format.fields; f; f = f->next) {
513 if (++count % 5 == 0)
514 fprintf(ofp, "\n\t ");
516 if (f->flags & FIELD_IS_FLAG) {
517 if ((count - 1) % 5 != 0) {
518 fprintf(ofp, "\n\t ");
521 fprintf(ofp, "flag_str(\"");
522 fprintf(ofp, "%s::%s\", ", event->system,
524 fprintf(ofp, "\"%s\", $%s)", f->name,
526 } else if (f->flags & FIELD_IS_SYMBOLIC) {
527 if ((count - 1) % 5 != 0) {
528 fprintf(ofp, "\n\t ");
531 fprintf(ofp, "symbol_str(\"");
532 fprintf(ofp, "%s::%s\", ", event->system,
534 fprintf(ofp, "\"%s\", $%s)", f->name,
537 fprintf(ofp, "$%s", f->name);
540 fprintf(ofp, ");\n");
541 fprintf(ofp, "}\n\n");
544 fprintf(ofp, "sub trace_unhandled\n{\n\tmy ($event_name, $context, "
545 "$common_cpu, $common_secs, $common_nsecs,\n\t "
546 "$common_pid, $common_comm) = @_;\n\n");
548 fprintf(ofp, "\tprint_header($event_name, $common_cpu, "
549 "$common_secs, $common_nsecs,\n\t $common_pid, "
550 "$common_comm);\n}\n\n");
552 fprintf(ofp, "sub print_header\n{\n"
553 "\tmy ($event_name, $cpu, $secs, $nsecs, $pid, $comm) = @_;\n\n"
554 "\tprintf(\"%%-20s %%5u %%05u.%%09u %%8u %%-20s \",\n\t "
555 "$event_name, $cpu, $secs, $nsecs, $pid, $comm);\n}");
559 fprintf(stderr, "generated Perl script: %s\n", fname);
564 struct scripting_ops perl_scripting_ops = {
566 .start_script = perl_start_script,
567 .stop_script = perl_stop_script,
568 .process_event = perl_process_event,
569 .generate_script = perl_generate_script,