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
27 #include <linux/bitmap.h>
33 #include "../../perf.h"
34 #include "../thread.h"
36 #include "../trace-event.h"
40 void boot_Perf__Trace__Context(pTHX_ CV
*cv
);
41 void boot_DynaLoader(pTHX_ CV
*cv
);
42 typedef PerlInterpreter
* INTERP
;
48 const char *file
= __FILE__
;
51 newXS("Perf::Trace::Context::bootstrap", boot_Perf__Trace__Context
,
53 newXS("DynaLoader::boot_DynaLoader", boot_DynaLoader
, file
);
58 #define TRACE_EVENT_TYPE_MAX \
59 ((1 << (sizeof(unsigned short) * 8)) - 1)
61 static DECLARE_BITMAP(events_defined
, TRACE_EVENT_TYPE_MAX
);
63 extern struct scripting_context
*scripting_context
;
65 static char *cur_field_name
;
66 static int zero_flag_atom
;
68 static void define_symbolic_value(const char *ev_name
,
69 const char *field_name
,
70 const char *field_value
,
71 const char *field_str
)
73 unsigned long long value
;
76 value
= eval_flag(field_value
);
82 XPUSHs(sv_2mortal(newSVpv(ev_name
, 0)));
83 XPUSHs(sv_2mortal(newSVpv(field_name
, 0)));
84 XPUSHs(sv_2mortal(newSVuv(value
)));
85 XPUSHs(sv_2mortal(newSVpv(field_str
, 0)));
88 if (get_cv("main::define_symbolic_value", 0))
89 call_pv("main::define_symbolic_value", G_SCALAR
);
96 static void define_symbolic_values(struct print_flag_sym
*field
,
98 const char *field_name
)
100 define_symbolic_value(ev_name
, field_name
, field
->value
, field
->str
);
102 define_symbolic_values(field
->next
, ev_name
, field_name
);
105 static void define_symbolic_field(const char *ev_name
,
106 const char *field_name
)
114 XPUSHs(sv_2mortal(newSVpv(ev_name
, 0)));
115 XPUSHs(sv_2mortal(newSVpv(field_name
, 0)));
118 if (get_cv("main::define_symbolic_field", 0))
119 call_pv("main::define_symbolic_field", G_SCALAR
);
126 static void define_flag_value(const char *ev_name
,
127 const char *field_name
,
128 const char *field_value
,
129 const char *field_str
)
131 unsigned long long value
;
134 value
= eval_flag(field_value
);
140 XPUSHs(sv_2mortal(newSVpv(ev_name
, 0)));
141 XPUSHs(sv_2mortal(newSVpv(field_name
, 0)));
142 XPUSHs(sv_2mortal(newSVuv(value
)));
143 XPUSHs(sv_2mortal(newSVpv(field_str
, 0)));
146 if (get_cv("main::define_flag_value", 0))
147 call_pv("main::define_flag_value", G_SCALAR
);
154 static void define_flag_values(struct print_flag_sym
*field
,
156 const char *field_name
)
158 define_flag_value(ev_name
, field_name
, field
->value
, field
->str
);
160 define_flag_values(field
->next
, ev_name
, field_name
);
163 static void define_flag_field(const char *ev_name
,
164 const char *field_name
,
173 XPUSHs(sv_2mortal(newSVpv(ev_name
, 0)));
174 XPUSHs(sv_2mortal(newSVpv(field_name
, 0)));
175 XPUSHs(sv_2mortal(newSVpv(delim
, 0)));
178 if (get_cv("main::define_flag_field", 0))
179 call_pv("main::define_flag_field", G_SCALAR
);
186 static void define_event_symbols(struct event_format
*event
,
188 struct print_arg
*args
)
193 switch (args
->type
) {
197 define_flag_value(ev_name
, cur_field_name
, "0",
202 free(cur_field_name
);
203 cur_field_name
= strdup(args
->field
.name
);
206 define_event_symbols(event
, ev_name
, args
->flags
.field
);
207 define_flag_field(ev_name
, cur_field_name
, args
->flags
.delim
);
208 define_flag_values(args
->flags
.flags
, ev_name
, cur_field_name
);
211 define_event_symbols(event
, ev_name
, args
->symbol
.field
);
212 define_symbolic_field(ev_name
, cur_field_name
);
213 define_symbolic_values(args
->symbol
.symbols
, ev_name
,
217 define_event_symbols(event
, ev_name
, args
->hex
.field
);
218 define_event_symbols(event
, ev_name
, args
->hex
.size
);
220 case PRINT_INT_ARRAY
:
221 define_event_symbols(event
, ev_name
, args
->int_array
.field
);
222 define_event_symbols(event
, ev_name
, args
->int_array
.count
);
223 define_event_symbols(event
, ev_name
, args
->int_array
.el_size
);
226 case PRINT_DYNAMIC_ARRAY
:
227 case PRINT_DYNAMIC_ARRAY_LEN
:
232 define_event_symbols(event
, ev_name
, args
->typecast
.item
);
235 if (strcmp(args
->op
.op
, ":") == 0)
237 define_event_symbols(event
, ev_name
, args
->op
.left
);
238 define_event_symbols(event
, ev_name
, args
->op
.right
);
242 pr_err("Unsupported print arg type\n");
243 /* we should warn... */
248 define_event_symbols(event
, ev_name
, args
->next
);
251 static void perl_process_tracepoint(struct perf_sample
*sample
,
252 struct perf_evsel
*evsel
,
253 struct thread
*thread
)
255 struct event_format
*event
= evsel
->tp_format
;
256 struct format_field
*field
;
257 static char handler
[256];
258 unsigned long long val
;
261 int cpu
= sample
->cpu
;
262 void *data
= sample
->raw_data
;
263 unsigned long long nsecs
= sample
->time
;
264 const char *comm
= thread__comm_str(thread
);
268 if (evsel
->attr
.type
!= PERF_TYPE_TRACEPOINT
)
272 die("ug! no event found for type %" PRIu64
, (u64
)evsel
->attr
.config
);
274 pid
= raw_field_value(event
, "common_pid", data
);
276 sprintf(handler
, "%s::%s", event
->system
, event
->name
);
278 if (!test_and_set_bit(event
->id
, events_defined
))
279 define_event_symbols(event
, handler
, event
->print_fmt
.args
);
281 s
= nsecs
/ NSECS_PER_SEC
;
282 ns
= nsecs
- s
* NSECS_PER_SEC
;
284 scripting_context
->event_data
= data
;
285 scripting_context
->pevent
= evsel
->tp_format
->pevent
;
291 XPUSHs(sv_2mortal(newSVpv(handler
, 0)));
292 XPUSHs(sv_2mortal(newSViv(PTR2IV(scripting_context
))));
293 XPUSHs(sv_2mortal(newSVuv(cpu
)));
294 XPUSHs(sv_2mortal(newSVuv(s
)));
295 XPUSHs(sv_2mortal(newSVuv(ns
)));
296 XPUSHs(sv_2mortal(newSViv(pid
)));
297 XPUSHs(sv_2mortal(newSVpv(comm
, 0)));
299 /* common fields other than pid can be accessed via xsub fns */
301 for (field
= event
->format
.fields
; field
; field
= field
->next
) {
302 if (field
->flags
& FIELD_IS_STRING
) {
304 if (field
->flags
& FIELD_IS_DYNAMIC
) {
305 offset
= *(int *)(data
+ field
->offset
);
308 offset
= field
->offset
;
309 XPUSHs(sv_2mortal(newSVpv((char *)data
+ offset
, 0)));
310 } else { /* FIELD_IS_NUMERIC */
311 val
= read_size(event
, data
+ field
->offset
,
313 if (field
->flags
& FIELD_IS_SIGNED
) {
314 XPUSHs(sv_2mortal(newSViv(val
)));
316 XPUSHs(sv_2mortal(newSVuv(val
)));
323 if (get_cv(handler
, 0))
324 call_pv(handler
, G_SCALAR
);
325 else if (get_cv("main::trace_unhandled", 0)) {
326 XPUSHs(sv_2mortal(newSVpv(handler
, 0)));
327 XPUSHs(sv_2mortal(newSViv(PTR2IV(scripting_context
))));
328 XPUSHs(sv_2mortal(newSVuv(cpu
)));
329 XPUSHs(sv_2mortal(newSVuv(nsecs
)));
330 XPUSHs(sv_2mortal(newSViv(pid
)));
331 XPUSHs(sv_2mortal(newSVpv(comm
, 0)));
332 call_pv("main::trace_unhandled", G_SCALAR
);
340 static void perl_process_event_generic(union perf_event
*event
,
341 struct perf_sample
*sample
,
342 struct perf_evsel
*evsel
)
346 if (!get_cv("process_event", 0))
352 XPUSHs(sv_2mortal(newSVpvn((const char *)event
, event
->header
.size
)));
353 XPUSHs(sv_2mortal(newSVpvn((const char *)&evsel
->attr
, sizeof(evsel
->attr
))));
354 XPUSHs(sv_2mortal(newSVpvn((const char *)sample
, sizeof(*sample
))));
355 XPUSHs(sv_2mortal(newSVpvn((const char *)sample
->raw_data
, sample
->raw_size
)));
357 call_pv("process_event", G_SCALAR
);
364 static void perl_process_event(union perf_event
*event
,
365 struct perf_sample
*sample
,
366 struct perf_evsel
*evsel
,
367 struct addr_location
*al
)
369 perl_process_tracepoint(sample
, evsel
, al
->thread
);
370 perl_process_event_generic(event
, sample
, evsel
);
373 static void run_start_sub(void)
375 dSP
; /* access to Perl stack */
378 if (get_cv("main::trace_begin", 0))
379 call_pv("main::trace_begin", G_DISCARD
| G_NOARGS
);
385 static int perl_start_script(const char *script
, int argc
, const char **argv
)
387 const char **command_line
;
390 command_line
= malloc((argc
+ 2) * sizeof(const char *));
391 command_line
[0] = "";
392 command_line
[1] = script
;
393 for (i
= 2; i
< argc
+ 2; i
++)
394 command_line
[i
] = argv
[i
- 2];
396 my_perl
= perl_alloc();
397 perl_construct(my_perl
);
399 if (perl_parse(my_perl
, xs_init
, argc
+ 2, (char **)command_line
,
405 if (perl_run(my_perl
)) {
426 static int perl_flush_script(void)
434 static int perl_stop_script(void)
436 dSP
; /* access to Perl stack */
439 if (get_cv("main::trace_end", 0))
440 call_pv("main::trace_end", G_DISCARD
| G_NOARGS
);
442 perl_destruct(my_perl
);
448 static int perl_generate_script(struct pevent
*pevent
, const char *outfile
)
450 struct event_format
*event
= NULL
;
451 struct format_field
*f
;
452 char fname
[PATH_MAX
];
453 int not_first
, count
;
456 sprintf(fname
, "%s.pl", outfile
);
457 ofp
= fopen(fname
, "w");
459 fprintf(stderr
, "couldn't open %s\n", fname
);
463 fprintf(ofp
, "# perf script event handlers, "
464 "generated by perf script -g perl\n");
466 fprintf(ofp
, "# Licensed under the terms of the GNU GPL"
467 " License version 2\n\n");
469 fprintf(ofp
, "# The common_* event handler fields are the most useful "
470 "fields common to\n");
472 fprintf(ofp
, "# all events. They don't necessarily correspond to "
473 "the 'common_*' fields\n");
475 fprintf(ofp
, "# in the format files. Those fields not available as "
476 "handler params can\n");
478 fprintf(ofp
, "# be retrieved using Perl functions of the form "
479 "common_*($context).\n");
481 fprintf(ofp
, "# See Context.pm for the list of available "
484 fprintf(ofp
, "use lib \"$ENV{'PERF_EXEC_PATH'}/scripts/perl/"
485 "Perf-Trace-Util/lib\";\n");
487 fprintf(ofp
, "use lib \"./Perf-Trace-Util/lib\";\n");
488 fprintf(ofp
, "use Perf::Trace::Core;\n");
489 fprintf(ofp
, "use Perf::Trace::Context;\n");
490 fprintf(ofp
, "use Perf::Trace::Util;\n\n");
492 fprintf(ofp
, "sub trace_begin\n{\n\t# optional\n}\n\n");
493 fprintf(ofp
, "sub trace_end\n{\n\t# optional\n}\n\n");
495 while ((event
= trace_find_next_event(pevent
, event
))) {
496 fprintf(ofp
, "sub %s::%s\n{\n", event
->system
, event
->name
);
497 fprintf(ofp
, "\tmy (");
499 fprintf(ofp
, "$event_name, ");
500 fprintf(ofp
, "$context, ");
501 fprintf(ofp
, "$common_cpu, ");
502 fprintf(ofp
, "$common_secs, ");
503 fprintf(ofp
, "$common_nsecs,\n");
504 fprintf(ofp
, "\t $common_pid, ");
505 fprintf(ofp
, "$common_comm,\n\t ");
510 for (f
= event
->format
.fields
; f
; f
= f
->next
) {
513 if (++count
% 5 == 0)
514 fprintf(ofp
, "\n\t ");
516 fprintf(ofp
, "$%s", f
->name
);
518 fprintf(ofp
, ") = @_;\n\n");
520 fprintf(ofp
, "\tprint_header($event_name, $common_cpu, "
521 "$common_secs, $common_nsecs,\n\t "
522 "$common_pid, $common_comm);\n\n");
524 fprintf(ofp
, "\tprintf(\"");
529 for (f
= event
->format
.fields
; f
; f
= f
->next
) {
532 if (count
&& count
% 4 == 0) {
533 fprintf(ofp
, "\".\n\t \"");
537 fprintf(ofp
, "%s=", f
->name
);
538 if (f
->flags
& FIELD_IS_STRING
||
539 f
->flags
& FIELD_IS_FLAG
||
540 f
->flags
& FIELD_IS_SYMBOLIC
)
542 else if (f
->flags
& FIELD_IS_SIGNED
)
548 fprintf(ofp
, "\\n\",\n\t ");
553 for (f
= event
->format
.fields
; f
; f
= f
->next
) {
557 if (++count
% 5 == 0)
558 fprintf(ofp
, "\n\t ");
560 if (f
->flags
& FIELD_IS_FLAG
) {
561 if ((count
- 1) % 5 != 0) {
562 fprintf(ofp
, "\n\t ");
565 fprintf(ofp
, "flag_str(\"");
566 fprintf(ofp
, "%s::%s\", ", event
->system
,
568 fprintf(ofp
, "\"%s\", $%s)", f
->name
,
570 } else if (f
->flags
& FIELD_IS_SYMBOLIC
) {
571 if ((count
- 1) % 5 != 0) {
572 fprintf(ofp
, "\n\t ");
575 fprintf(ofp
, "symbol_str(\"");
576 fprintf(ofp
, "%s::%s\", ", event
->system
,
578 fprintf(ofp
, "\"%s\", $%s)", f
->name
,
581 fprintf(ofp
, "$%s", f
->name
);
584 fprintf(ofp
, ");\n");
585 fprintf(ofp
, "}\n\n");
588 fprintf(ofp
, "sub trace_unhandled\n{\n\tmy ($event_name, $context, "
589 "$common_cpu, $common_secs, $common_nsecs,\n\t "
590 "$common_pid, $common_comm) = @_;\n\n");
592 fprintf(ofp
, "\tprint_header($event_name, $common_cpu, "
593 "$common_secs, $common_nsecs,\n\t $common_pid, "
594 "$common_comm);\n}\n\n");
596 fprintf(ofp
, "sub print_header\n{\n"
597 "\tmy ($event_name, $cpu, $secs, $nsecs, $pid, $comm) = @_;\n\n"
598 "\tprintf(\"%%-20s %%5u %%05u.%%09u %%8u %%-20s \",\n\t "
599 "$event_name, $cpu, $secs, $nsecs, $pid, $comm);\n}\n");
602 "\n# Packed byte string args of process_event():\n"
604 "# $event:\tunion perf_event\tutil/event.h\n"
605 "# $attr:\tstruct perf_event_attr\tlinux/perf_event.h\n"
606 "# $sample:\tstruct perf_sample\tutil/event.h\n"
607 "# $raw_data:\tperf_sample->raw_data\tutil/event.h\n"
609 "sub process_event\n"
611 "\tmy ($event, $attr, $sample, $raw_data) = @_;\n"
613 "\tmy @event\t= unpack(\"LSS\", $event);\n"
614 "\tmy @attr\t= unpack(\"LLQQQQQLLQQ\", $attr);\n"
615 "\tmy @sample\t= unpack(\"QLLQQQQQLL\", $sample);\n"
616 "\tmy @raw_data\t= unpack(\"C*\", $raw_data);\n"
618 "\tuse Data::Dumper;\n"
619 "\tprint Dumper \\@event, \\@attr, \\@sample, \\@raw_data;\n"
624 fprintf(stderr
, "generated Perl script: %s\n", fname
);
629 struct scripting_ops perl_scripting_ops
= {
631 .start_script
= perl_start_script
,
632 .flush_script
= perl_flush_script
,
633 .stop_script
= perl_stop_script
,
634 .process_event
= perl_process_event
,
635 .generate_script
= perl_generate_script
,