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 "../thread.h"
32 #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 case PRINT_DYNAMIC_ARRAY
:
217 define_event_symbols(event
, ev_name
, args
->typecast
.item
);
220 if (strcmp(args
->op
.op
, ":") == 0)
222 define_event_symbols(event
, ev_name
, args
->op
.left
);
223 define_event_symbols(event
, ev_name
, args
->op
.right
);
227 pr_err("Unsupported print arg type\n");
228 /* we should warn... */
233 define_event_symbols(event
, ev_name
, args
->next
);
236 static inline struct event_format
*find_cache_event(int type
)
238 static char ev_name
[256];
239 struct event_format
*event
;
244 events
[type
] = event
= trace_find_event(type
);
248 sprintf(ev_name
, "%s::%s", event
->system
, event
->name
);
250 define_event_symbols(event
, ev_name
, event
->print_fmt
.args
);
255 static void perl_process_tracepoint(union perf_event
*pevent __unused
,
256 struct perf_sample
*sample
,
257 struct perf_evsel
*evsel
,
258 struct machine
*machine __unused
,
259 struct thread
*thread
)
261 struct format_field
*field
;
262 static char handler
[256];
263 unsigned long long val
;
265 struct event_format
*event
;
268 int cpu
= sample
->cpu
;
269 void *data
= sample
->raw_data
;
270 unsigned long long nsecs
= sample
->time
;
271 char *comm
= thread
->comm
;
275 if (evsel
->attr
.type
!= PERF_TYPE_TRACEPOINT
)
278 type
= trace_parse_common_type(data
);
280 event
= find_cache_event(type
);
282 die("ug! no event found for type %d", type
);
284 pid
= trace_parse_common_pid(data
);
286 sprintf(handler
, "%s::%s", event
->system
, event
->name
);
288 s
= nsecs
/ NSECS_PER_SEC
;
289 ns
= nsecs
- s
* NSECS_PER_SEC
;
291 scripting_context
->event_data
= data
;
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)));
305 /* common fields other than pid can be accessed via xsub fns */
307 for (field
= event
->format
.fields
; field
; field
= field
->next
) {
308 if (field
->flags
& FIELD_IS_STRING
) {
310 if (field
->flags
& FIELD_IS_DYNAMIC
) {
311 offset
= *(int *)(data
+ field
->offset
);
314 offset
= field
->offset
;
315 XPUSHs(sv_2mortal(newSVpv((char *)data
+ offset
, 0)));
316 } else { /* FIELD_IS_NUMERIC */
317 val
= read_size(data
+ field
->offset
, field
->size
);
318 if (field
->flags
& FIELD_IS_SIGNED
) {
319 XPUSHs(sv_2mortal(newSViv(val
)));
321 XPUSHs(sv_2mortal(newSVuv(val
)));
328 if (get_cv(handler
, 0))
329 call_pv(handler
, G_SCALAR
);
330 else if (get_cv("main::trace_unhandled", 0)) {
331 XPUSHs(sv_2mortal(newSVpv(handler
, 0)));
332 XPUSHs(sv_2mortal(newSViv(PTR2IV(scripting_context
))));
333 XPUSHs(sv_2mortal(newSVuv(cpu
)));
334 XPUSHs(sv_2mortal(newSVuv(nsecs
)));
335 XPUSHs(sv_2mortal(newSViv(pid
)));
336 XPUSHs(sv_2mortal(newSVpv(comm
, 0)));
337 call_pv("main::trace_unhandled", G_SCALAR
);
345 static void perl_process_event_generic(union perf_event
*pevent __unused
,
346 struct perf_sample
*sample
,
347 struct perf_evsel
*evsel __unused
,
348 struct machine
*machine __unused
,
349 struct thread
*thread __unused
)
353 if (!get_cv("process_event", 0))
359 XPUSHs(sv_2mortal(newSVpvn((const char *)pevent
, pevent
->header
.size
)));
360 XPUSHs(sv_2mortal(newSVpvn((const char *)&evsel
->attr
, sizeof(evsel
->attr
))));
361 XPUSHs(sv_2mortal(newSVpvn((const char *)sample
, sizeof(*sample
))));
362 XPUSHs(sv_2mortal(newSVpvn((const char *)sample
->raw_data
, sample
->raw_size
)));
364 call_pv("process_event", G_SCALAR
);
371 static void perl_process_event(union perf_event
*pevent
,
372 struct perf_sample
*sample
,
373 struct perf_evsel
*evsel
,
374 struct machine
*machine
,
375 struct thread
*thread
)
377 perl_process_tracepoint(pevent
, sample
, evsel
, machine
, thread
);
378 perl_process_event_generic(pevent
, sample
, evsel
, machine
, thread
);
381 static void run_start_sub(void)
383 dSP
; /* access to Perl stack */
386 if (get_cv("main::trace_begin", 0))
387 call_pv("main::trace_begin", G_DISCARD
| G_NOARGS
);
393 static int perl_start_script(const char *script
, int argc
, const char **argv
)
395 const char **command_line
;
398 command_line
= malloc((argc
+ 2) * sizeof(const char *));
399 command_line
[0] = "";
400 command_line
[1] = script
;
401 for (i
= 2; i
< argc
+ 2; i
++)
402 command_line
[i
] = argv
[i
- 2];
404 my_perl
= perl_alloc();
405 perl_construct(my_perl
);
407 if (perl_parse(my_perl
, xs_init
, argc
+ 2, (char **)command_line
,
413 if (perl_run(my_perl
)) {
437 static int perl_stop_script(void)
439 dSP
; /* access to Perl stack */
442 if (get_cv("main::trace_end", 0))
443 call_pv("main::trace_end", G_DISCARD
| G_NOARGS
);
445 perl_destruct(my_perl
);
451 static int perl_generate_script(const char *outfile
)
453 struct event_format
*event
= NULL
;
454 struct format_field
*f
;
455 char fname
[PATH_MAX
];
456 int not_first
, count
;
459 sprintf(fname
, "%s.pl", outfile
);
460 ofp
= fopen(fname
, "w");
462 fprintf(stderr
, "couldn't open %s\n", fname
);
466 fprintf(ofp
, "# perf script event handlers, "
467 "generated by perf script -g perl\n");
469 fprintf(ofp
, "# Licensed under the terms of the GNU GPL"
470 " License version 2\n\n");
472 fprintf(ofp
, "# The common_* event handler fields are the most useful "
473 "fields common to\n");
475 fprintf(ofp
, "# all events. They don't necessarily correspond to "
476 "the 'common_*' fields\n");
478 fprintf(ofp
, "# in the format files. Those fields not available as "
479 "handler params can\n");
481 fprintf(ofp
, "# be retrieved using Perl functions of the form "
482 "common_*($context).\n");
484 fprintf(ofp
, "# See Context.pm for the list of available "
487 fprintf(ofp
, "use lib \"$ENV{'PERF_EXEC_PATH'}/scripts/perl/"
488 "Perf-Trace-Util/lib\";\n");
490 fprintf(ofp
, "use lib \"./Perf-Trace-Util/lib\";\n");
491 fprintf(ofp
, "use Perf::Trace::Core;\n");
492 fprintf(ofp
, "use Perf::Trace::Context;\n");
493 fprintf(ofp
, "use Perf::Trace::Util;\n\n");
495 fprintf(ofp
, "sub trace_begin\n{\n\t# optional\n}\n\n");
496 fprintf(ofp
, "sub trace_end\n{\n\t# optional\n}\n\n");
498 while ((event
= trace_find_next_event(event
))) {
499 fprintf(ofp
, "sub %s::%s\n{\n", event
->system
, event
->name
);
500 fprintf(ofp
, "\tmy (");
502 fprintf(ofp
, "$event_name, ");
503 fprintf(ofp
, "$context, ");
504 fprintf(ofp
, "$common_cpu, ");
505 fprintf(ofp
, "$common_secs, ");
506 fprintf(ofp
, "$common_nsecs,\n");
507 fprintf(ofp
, "\t $common_pid, ");
508 fprintf(ofp
, "$common_comm,\n\t ");
513 for (f
= event
->format
.fields
; f
; f
= f
->next
) {
516 if (++count
% 5 == 0)
517 fprintf(ofp
, "\n\t ");
519 fprintf(ofp
, "$%s", f
->name
);
521 fprintf(ofp
, ") = @_;\n\n");
523 fprintf(ofp
, "\tprint_header($event_name, $common_cpu, "
524 "$common_secs, $common_nsecs,\n\t "
525 "$common_pid, $common_comm);\n\n");
527 fprintf(ofp
, "\tprintf(\"");
532 for (f
= event
->format
.fields
; f
; f
= f
->next
) {
535 if (count
&& count
% 4 == 0) {
536 fprintf(ofp
, "\".\n\t \"");
540 fprintf(ofp
, "%s=", f
->name
);
541 if (f
->flags
& FIELD_IS_STRING
||
542 f
->flags
& FIELD_IS_FLAG
||
543 f
->flags
& FIELD_IS_SYMBOLIC
)
545 else if (f
->flags
& FIELD_IS_SIGNED
)
551 fprintf(ofp
, "\\n\",\n\t ");
556 for (f
= event
->format
.fields
; f
; f
= f
->next
) {
560 if (++count
% 5 == 0)
561 fprintf(ofp
, "\n\t ");
563 if (f
->flags
& FIELD_IS_FLAG
) {
564 if ((count
- 1) % 5 != 0) {
565 fprintf(ofp
, "\n\t ");
568 fprintf(ofp
, "flag_str(\"");
569 fprintf(ofp
, "%s::%s\", ", event
->system
,
571 fprintf(ofp
, "\"%s\", $%s)", f
->name
,
573 } else if (f
->flags
& FIELD_IS_SYMBOLIC
) {
574 if ((count
- 1) % 5 != 0) {
575 fprintf(ofp
, "\n\t ");
578 fprintf(ofp
, "symbol_str(\"");
579 fprintf(ofp
, "%s::%s\", ", event
->system
,
581 fprintf(ofp
, "\"%s\", $%s)", f
->name
,
584 fprintf(ofp
, "$%s", f
->name
);
587 fprintf(ofp
, ");\n");
588 fprintf(ofp
, "}\n\n");
591 fprintf(ofp
, "sub trace_unhandled\n{\n\tmy ($event_name, $context, "
592 "$common_cpu, $common_secs, $common_nsecs,\n\t "
593 "$common_pid, $common_comm) = @_;\n\n");
595 fprintf(ofp
, "\tprint_header($event_name, $common_cpu, "
596 "$common_secs, $common_nsecs,\n\t $common_pid, "
597 "$common_comm);\n}\n\n");
599 fprintf(ofp
, "sub print_header\n{\n"
600 "\tmy ($event_name, $cpu, $secs, $nsecs, $pid, $comm) = @_;\n\n"
601 "\tprintf(\"%%-20s %%5u %%05u.%%09u %%8u %%-20s \",\n\t "
602 "$event_name, $cpu, $secs, $nsecs, $pid, $comm);\n}\n");
605 "\n# Packed byte string args of process_event():\n"
607 "# $event:\tunion perf_event\tutil/event.h\n"
608 "# $attr:\tstruct perf_event_attr\tlinux/perf_event.h\n"
609 "# $sample:\tstruct perf_sample\tutil/event.h\n"
610 "# $raw_data:\tperf_sample->raw_data\tutil/event.h\n"
612 "sub process_event\n"
614 "\tmy ($event, $attr, $sample, $raw_data) = @_;\n"
616 "\tmy @event\t= unpack(\"LSS\", $event);\n"
617 "\tmy @attr\t= unpack(\"LLQQQQQLLQQ\", $attr);\n"
618 "\tmy @sample\t= unpack(\"QLLQQQQQLL\", $sample);\n"
619 "\tmy @raw_data\t= unpack(\"C*\", $raw_data);\n"
621 "\tuse Data::Dumper;\n"
622 "\tprint Dumper \\@event, \\@attr, \\@sample, \\@raw_data;\n"
627 fprintf(stderr
, "generated Perl script: %s\n", fname
);
632 struct scripting_ops perl_scripting_ops
= {
634 .start_script
= perl_start_script
,
635 .stop_script
= perl_stop_script
,
636 .process_event
= perl_process_event
,
637 .generate_script
= perl_generate_script
,