~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/tools/perf/util/scripting-engines/trace-event-perl.c

Version: ~ [ linux-5.12-rc1 ] ~ [ linux-5.11.2 ] ~ [ linux-5.10.19 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.101 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.177 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.222 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.258 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.258 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.18.140 ] ~ [ linux-3.16.85 ] ~ [ linux-3.14.79 ] ~ [ linux-3.12.74 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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 <inttypes.h>
 23 #include <stdio.h>
 24 #include <stdlib.h>
 25 #include <string.h>
 26 #include <ctype.h>
 27 #include <errno.h>
 28 #include <linux/bitmap.h>
 29 #include <linux/time64.h>
 30 
 31 #include <stdbool.h>
 32 /* perl needs the following define, right after including stdbool.h */
 33 #define HAS_BOOL
 34 #include <EXTERN.h>
 35 #include <perl.h>
 36 
 37 #include "../callchain.h"
 38 #include "../dso.h"
 39 #include "../machine.h"
 40 #include "../map.h"
 41 #include "../symbol.h"
 42 #include "../thread.h"
 43 #include "../event.h"
 44 #include "../trace-event.h"
 45 #include "../evsel.h"
 46 #include "../debug.h"
 47 
 48 void boot_Perf__Trace__Context(pTHX_ CV *cv);
 49 void boot_DynaLoader(pTHX_ CV *cv);
 50 typedef PerlInterpreter * INTERP;
 51 
 52 void xs_init(pTHX);
 53 
 54 void xs_init(pTHX)
 55 {
 56         const char *file = __FILE__;
 57         dXSUB_SYS;
 58 
 59         newXS("Perf::Trace::Context::bootstrap", boot_Perf__Trace__Context,
 60               file);
 61         newXS("DynaLoader::boot_DynaLoader", boot_DynaLoader, file);
 62 }
 63 
 64 INTERP my_perl;
 65 
 66 #define TRACE_EVENT_TYPE_MAX                            \
 67         ((1 << (sizeof(unsigned short) * 8)) - 1)
 68 
 69 static DECLARE_BITMAP(events_defined, TRACE_EVENT_TYPE_MAX);
 70 
 71 extern struct scripting_context *scripting_context;
 72 
 73 static char *cur_field_name;
 74 static int zero_flag_atom;
 75 
 76 static void define_symbolic_value(const char *ev_name,
 77                                   const char *field_name,
 78                                   const char *field_value,
 79                                   const char *field_str)
 80 {
 81         unsigned long long value;
 82         dSP;
 83 
 84         value = eval_flag(field_value);
 85 
 86         ENTER;
 87         SAVETMPS;
 88         PUSHMARK(SP);
 89 
 90         XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
 91         XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
 92         XPUSHs(sv_2mortal(newSVuv(value)));
 93         XPUSHs(sv_2mortal(newSVpv(field_str, 0)));
 94 
 95         PUTBACK;
 96         if (get_cv("main::define_symbolic_value", 0))
 97                 call_pv("main::define_symbolic_value", G_SCALAR);
 98         SPAGAIN;
 99         PUTBACK;
100         FREETMPS;
101         LEAVE;
102 }
103 
104 static void define_symbolic_values(struct tep_print_flag_sym *field,
105                                    const char *ev_name,
106                                    const char *field_name)
107 {
108         define_symbolic_value(ev_name, field_name, field->value, field->str);
109         if (field->next)
110                 define_symbolic_values(field->next, ev_name, field_name);
111 }
112 
113 static void define_symbolic_field(const char *ev_name,
114                                   const char *field_name)
115 {
116         dSP;
117 
118         ENTER;
119         SAVETMPS;
120         PUSHMARK(SP);
121 
122         XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
123         XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
124 
125         PUTBACK;
126         if (get_cv("main::define_symbolic_field", 0))
127                 call_pv("main::define_symbolic_field", G_SCALAR);
128         SPAGAIN;
129         PUTBACK;
130         FREETMPS;
131         LEAVE;
132 }
133 
134 static void define_flag_value(const char *ev_name,
135                               const char *field_name,
136                               const char *field_value,
137                               const char *field_str)
138 {
139         unsigned long long value;
140         dSP;
141 
142         value = eval_flag(field_value);
143 
144         ENTER;
145         SAVETMPS;
146         PUSHMARK(SP);
147 
148         XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
149         XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
150         XPUSHs(sv_2mortal(newSVuv(value)));
151         XPUSHs(sv_2mortal(newSVpv(field_str, 0)));
152 
153         PUTBACK;
154         if (get_cv("main::define_flag_value", 0))
155                 call_pv("main::define_flag_value", G_SCALAR);
156         SPAGAIN;
157         PUTBACK;
158         FREETMPS;
159         LEAVE;
160 }
161 
162 static void define_flag_values(struct tep_print_flag_sym *field,
163                                const char *ev_name,
164                                const char *field_name)
165 {
166         define_flag_value(ev_name, field_name, field->value, field->str);
167         if (field->next)
168                 define_flag_values(field->next, ev_name, field_name);
169 }
170 
171 static void define_flag_field(const char *ev_name,
172                               const char *field_name,
173                               const char *delim)
174 {
175         dSP;
176 
177         ENTER;
178         SAVETMPS;
179         PUSHMARK(SP);
180 
181         XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
182         XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
183         XPUSHs(sv_2mortal(newSVpv(delim, 0)));
184 
185         PUTBACK;
186         if (get_cv("main::define_flag_field", 0))
187                 call_pv("main::define_flag_field", G_SCALAR);
188         SPAGAIN;
189         PUTBACK;
190         FREETMPS;
191         LEAVE;
192 }
193 
194 static void define_event_symbols(struct tep_event *event,
195                                  const char *ev_name,
196                                  struct tep_print_arg *args)
197 {
198         if (args == NULL)
199                 return;
200 
201         switch (args->type) {
202         case TEP_PRINT_NULL:
203                 break;
204         case TEP_PRINT_ATOM:
205                 define_flag_value(ev_name, cur_field_name, "",
206                                   args->atom.atom);
207                 zero_flag_atom = 0;
208                 break;
209         case TEP_PRINT_FIELD:
210                 free(cur_field_name);
211                 cur_field_name = strdup(args->field.name);
212                 break;
213         case TEP_PRINT_FLAGS:
214                 define_event_symbols(event, ev_name, args->flags.field);
215                 define_flag_field(ev_name, cur_field_name, args->flags.delim);
216                 define_flag_values(args->flags.flags, ev_name, cur_field_name);
217                 break;
218         case TEP_PRINT_SYMBOL:
219                 define_event_symbols(event, ev_name, args->symbol.field);
220                 define_symbolic_field(ev_name, cur_field_name);
221                 define_symbolic_values(args->symbol.symbols, ev_name,
222                                        cur_field_name);
223                 break;
224         case TEP_PRINT_HEX:
225         case TEP_PRINT_HEX_STR:
226                 define_event_symbols(event, ev_name, args->hex.field);
227                 define_event_symbols(event, ev_name, args->hex.size);
228                 break;
229         case TEP_PRINT_INT_ARRAY:
230                 define_event_symbols(event, ev_name, args->int_array.field);
231                 define_event_symbols(event, ev_name, args->int_array.count);
232                 define_event_symbols(event, ev_name, args->int_array.el_size);
233                 break;
234         case TEP_PRINT_BSTRING:
235         case TEP_PRINT_DYNAMIC_ARRAY:
236         case TEP_PRINT_DYNAMIC_ARRAY_LEN:
237         case TEP_PRINT_STRING:
238         case TEP_PRINT_BITMASK:
239                 break;
240         case TEP_PRINT_TYPE:
241                 define_event_symbols(event, ev_name, args->typecast.item);
242                 break;
243         case TEP_PRINT_OP:
244                 if (strcmp(args->op.op, ":") == 0)
245                         zero_flag_atom = 1;
246                 define_event_symbols(event, ev_name, args->op.left);
247                 define_event_symbols(event, ev_name, args->op.right);
248                 break;
249         case TEP_PRINT_FUNC:
250         default:
251                 pr_err("Unsupported print arg type\n");
252                 /* we should warn... */
253                 return;
254         }
255 
256         if (args->next)
257                 define_event_symbols(event, ev_name, args->next);
258 }
259 
260 static SV *perl_process_callchain(struct perf_sample *sample,
261                                   struct evsel *evsel,
262                                   struct addr_location *al)
263 {
264         AV *list;
265 
266         list = newAV();
267         if (!list)
268                 goto exit;
269 
270         if (!symbol_conf.use_callchain || !sample->callchain)
271                 goto exit;
272 
273         if (thread__resolve_callchain(al->thread, &callchain_cursor, evsel,
274                                       sample, NULL, NULL, scripting_max_stack) != 0) {
275                 pr_err("Failed to resolve callchain. Skipping\n");
276                 goto exit;
277         }
278         callchain_cursor_commit(&callchain_cursor);
279 
280 
281         while (1) {
282                 HV *elem;
283                 struct callchain_cursor_node *node;
284                 node = callchain_cursor_current(&callchain_cursor);
285                 if (!node)
286                         break;
287 
288                 elem = newHV();
289                 if (!elem)
290                         goto exit;
291 
292                 if (!hv_stores(elem, "ip", newSVuv(node->ip))) {
293                         hv_undef(elem);
294                         goto exit;
295                 }
296 
297                 if (node->ms.sym) {
298                         HV *sym = newHV();
299                         if (!sym) {
300                                 hv_undef(elem);
301                                 goto exit;
302                         }
303                         if (!hv_stores(sym, "start",   newSVuv(node->ms.sym->start)) ||
304                             !hv_stores(sym, "end",     newSVuv(node->ms.sym->end)) ||
305                             !hv_stores(sym, "binding", newSVuv(node->ms.sym->binding)) ||
306                             !hv_stores(sym, "name",    newSVpvn(node->ms.sym->name,
307                                                                 node->ms.sym->namelen)) ||
308                             !hv_stores(elem, "sym",    newRV_noinc((SV*)sym))) {
309                                 hv_undef(sym);
310                                 hv_undef(elem);
311                                 goto exit;
312                         }
313                 }
314 
315                 if (node->ms.map) {
316                         struct map *map = node->ms.map;
317                         const char *dsoname = "[unknown]";
318                         if (map && map->dso) {
319                                 if (symbol_conf.show_kernel_path && map->dso->long_name)
320                                         dsoname = map->dso->long_name;
321                                 else
322                                         dsoname = map->dso->name;
323                         }
324                         if (!hv_stores(elem, "dso", newSVpv(dsoname,0))) {
325                                 hv_undef(elem);
326                                 goto exit;
327                         }
328                 }
329 
330                 callchain_cursor_advance(&callchain_cursor);
331                 av_push(list, newRV_noinc((SV*)elem));
332         }
333 
334 exit:
335         return newRV_noinc((SV*)list);
336 }
337 
338 static void perl_process_tracepoint(struct perf_sample *sample,
339                                     struct evsel *evsel,
340                                     struct addr_location *al)
341 {
342         struct thread *thread = al->thread;
343         struct tep_event *event = evsel->tp_format;
344         struct tep_format_field *field;
345         static char handler[256];
346         unsigned long long val;
347         unsigned long s, ns;
348         int pid;
349         int cpu = sample->cpu;
350         void *data = sample->raw_data;
351         unsigned long long nsecs = sample->time;
352         const char *comm = thread__comm_str(thread);
353 
354         dSP;
355 
356         if (evsel->core.attr.type != PERF_TYPE_TRACEPOINT)
357                 return;
358 
359         if (!event) {
360                 pr_debug("ug! no event found for type %" PRIu64, (u64)evsel->core.attr.config);
361                 return;
362         }
363 
364         pid = raw_field_value(event, "common_pid", data);
365 
366         sprintf(handler, "%s::%s", event->system, event->name);
367 
368         if (!test_and_set_bit(event->id, events_defined))
369                 define_event_symbols(event, handler, event->print_fmt.args);
370 
371         s = nsecs / NSEC_PER_SEC;
372         ns = nsecs - s * NSEC_PER_SEC;
373 
374         scripting_context->event_data = data;
375         scripting_context->pevent = evsel->tp_format->tep;
376 
377         ENTER;
378         SAVETMPS;
379         PUSHMARK(SP);
380 
381         XPUSHs(sv_2mortal(newSVpv(handler, 0)));
382         XPUSHs(sv_2mortal(newSViv(PTR2IV(scripting_context))));
383         XPUSHs(sv_2mortal(newSVuv(cpu)));
384         XPUSHs(sv_2mortal(newSVuv(s)));
385         XPUSHs(sv_2mortal(newSVuv(ns)));
386         XPUSHs(sv_2mortal(newSViv(pid)));
387         XPUSHs(sv_2mortal(newSVpv(comm, 0)));
388         XPUSHs(sv_2mortal(perl_process_callchain(sample, evsel, al)));
389 
390         /* common fields other than pid can be accessed via xsub fns */
391 
392         for (field = event->format.fields; field; field = field->next) {
393                 if (field->flags & TEP_FIELD_IS_STRING) {
394                         int offset;
395                         if (field->flags & TEP_FIELD_IS_DYNAMIC) {
396                                 offset = *(int *)(data + field->offset);
397                                 offset &= 0xffff;
398                         } else
399                                 offset = field->offset;
400                         XPUSHs(sv_2mortal(newSVpv((char *)data + offset, 0)));
401                 } else { /* FIELD_IS_NUMERIC */
402                         val = read_size(event, data + field->offset,
403                                         field->size);
404                         if (field->flags & TEP_FIELD_IS_SIGNED) {
405                                 XPUSHs(sv_2mortal(newSViv(val)));
406                         } else {
407                                 XPUSHs(sv_2mortal(newSVuv(val)));
408                         }
409                 }
410         }
411 
412         PUTBACK;
413 
414         if (get_cv(handler, 0))
415                 call_pv(handler, G_SCALAR);
416         else if (get_cv("main::trace_unhandled", 0)) {
417                 XPUSHs(sv_2mortal(newSVpv(handler, 0)));
418                 XPUSHs(sv_2mortal(newSViv(PTR2IV(scripting_context))));
419                 XPUSHs(sv_2mortal(newSVuv(cpu)));
420                 XPUSHs(sv_2mortal(newSVuv(nsecs)));
421                 XPUSHs(sv_2mortal(newSViv(pid)));
422                 XPUSHs(sv_2mortal(newSVpv(comm, 0)));
423                 XPUSHs(sv_2mortal(perl_process_callchain(sample, evsel, al)));
424                 call_pv("main::trace_unhandled", G_SCALAR);
425         }
426         SPAGAIN;
427         PUTBACK;
428         FREETMPS;
429         LEAVE;
430 }
431 
432 static void perl_process_event_generic(union perf_event *event,
433                                        struct perf_sample *sample,
434                                        struct evsel *evsel)
435 {
436         dSP;
437 
438         if (!get_cv("process_event", 0))
439                 return;
440 
441         ENTER;
442         SAVETMPS;
443         PUSHMARK(SP);
444         XPUSHs(sv_2mortal(newSVpvn((const char *)event, event->header.size)));
445         XPUSHs(sv_2mortal(newSVpvn((const char *)&evsel->core.attr, sizeof(evsel->core.attr))));
446         XPUSHs(sv_2mortal(newSVpvn((const char *)sample, sizeof(*sample))));
447         XPUSHs(sv_2mortal(newSVpvn((const char *)sample->raw_data, sample->raw_size)));
448         PUTBACK;
449         call_pv("process_event", G_SCALAR);
450         SPAGAIN;
451         PUTBACK;
452         FREETMPS;
453         LEAVE;
454 }
455 
456 static void perl_process_event(union perf_event *event,
457                                struct perf_sample *sample,
458                                struct evsel *evsel,
459                                struct addr_location *al)
460 {
461         perl_process_tracepoint(sample, evsel, al);
462         perl_process_event_generic(event, sample, evsel);
463 }
464 
465 static void run_start_sub(void)
466 {
467         dSP; /* access to Perl stack */
468         PUSHMARK(SP);
469 
470         if (get_cv("main::trace_begin", 0))
471                 call_pv("main::trace_begin", G_DISCARD | G_NOARGS);
472 }
473 
474 /*
475  * Start trace script
476  */
477 static int perl_start_script(const char *script, int argc, const char **argv)
478 {
479         const char **command_line;
480         int i, err = 0;
481 
482         command_line = malloc((argc + 2) * sizeof(const char *));
483         command_line[0] = "";
484         command_line[1] = script;
485         for (i = 2; i < argc + 2; i++)
486                 command_line[i] = argv[i - 2];
487 
488         my_perl = perl_alloc();
489         perl_construct(my_perl);
490 
491         if (perl_parse(my_perl, xs_init, argc + 2, (char **)command_line,
492                        (char **)NULL)) {
493                 err = -1;
494                 goto error;
495         }
496 
497         if (perl_run(my_perl)) {
498                 err = -1;
499                 goto error;
500         }
501 
502         if (SvTRUE(ERRSV)) {
503                 err = -1;
504                 goto error;
505         }
506 
507         run_start_sub();
508 
509         free(command_line);
510         return 0;
511 error:
512         perl_free(my_perl);
513         free(command_line);
514 
515         return err;
516 }
517 
518 static int perl_flush_script(void)
519 {
520         return 0;
521 }
522 
523 /*
524  * Stop trace script
525  */
526 static int perl_stop_script(void)
527 {
528         dSP; /* access to Perl stack */
529         PUSHMARK(SP);
530 
531         if (get_cv("main::trace_end", 0))
532                 call_pv("main::trace_end", G_DISCARD | G_NOARGS);
533 
534         perl_destruct(my_perl);
535         perl_free(my_perl);
536 
537         return 0;
538 }
539 
540 static int perl_generate_script(struct tep_handle *pevent, const char *outfile)
541 {
542         int i, not_first, count, nr_events;
543         struct tep_event **all_events;
544         struct tep_event *event = NULL;
545         struct tep_format_field *f;
546         char fname[PATH_MAX];
547         FILE *ofp;
548 
549         sprintf(fname, "%s.pl", outfile);
550         ofp = fopen(fname, "w");
551         if (ofp == NULL) {
552                 fprintf(stderr, "couldn't open %s\n", fname);
553                 return -1;
554         }
555 
556         fprintf(ofp, "# perf script event handlers, "
557                 "generated by perf script -g perl\n");
558 
559         fprintf(ofp, "# Licensed under the terms of the GNU GPL"
560                 " License version 2\n\n");
561 
562         fprintf(ofp, "# The common_* event handler fields are the most useful "
563                 "fields common to\n");
564 
565         fprintf(ofp, "# all events.  They don't necessarily correspond to "
566                 "the 'common_*' fields\n");
567 
568         fprintf(ofp, "# in the format files.  Those fields not available as "
569                 "handler params can\n");
570 
571         fprintf(ofp, "# be retrieved using Perl functions of the form "
572                 "common_*($context).\n");
573 
574         fprintf(ofp, "# See Context.pm for the list of available "
575                 "functions.\n\n");
576 
577         fprintf(ofp, "use lib \"$ENV{'PERF_EXEC_PATH'}/scripts/perl/"
578                 "Perf-Trace-Util/lib\";\n");
579 
580         fprintf(ofp, "use lib \"./Perf-Trace-Util/lib\";\n");
581         fprintf(ofp, "use Perf::Trace::Core;\n");
582         fprintf(ofp, "use Perf::Trace::Context;\n");
583         fprintf(ofp, "use Perf::Trace::Util;\n\n");
584 
585         fprintf(ofp, "sub trace_begin\n{\n\t# optional\n}\n\n");
586         fprintf(ofp, "sub trace_end\n{\n\t# optional\n}\n");
587 
588 
589         fprintf(ofp, "\n\
590 sub print_backtrace\n\
591 {\n\
592         my $callchain = shift;\n\
593         for my $node (@$callchain)\n\
594         {\n\
595                 if(exists $node->{sym})\n\
596                 {\n\
597                         printf( \"\\t[\\%%x] \\%%s\\n\", $node->{ip}, $node->{sym}{name});\n\
598                 }\n\
599                 else\n\
600                 {\n\
601                         printf( \"\\t[\\%%x]\\n\", $node{ip});\n\
602                 }\n\
603         }\n\
604 }\n\n\
605 ");
606 
607         nr_events = tep_get_events_count(pevent);
608         all_events = tep_list_events(pevent, TEP_EVENT_SORT_ID);
609 
610         for (i = 0; all_events && i < nr_events; i++) {
611                 event = all_events[i];
612                 fprintf(ofp, "sub %s::%s\n{\n", event->system, event->name);
613                 fprintf(ofp, "\tmy (");
614 
615                 fprintf(ofp, "$event_name, ");
616                 fprintf(ofp, "$context, ");
617                 fprintf(ofp, "$common_cpu, ");
618                 fprintf(ofp, "$common_secs, ");
619                 fprintf(ofp, "$common_nsecs,\n");
620                 fprintf(ofp, "\t    $common_pid, ");
621                 fprintf(ofp, "$common_comm, ");
622                 fprintf(ofp, "$common_callchain,\n\t    ");
623 
624                 not_first = 0;
625                 count = 0;
626 
627                 for (f = event->format.fields; f; f = f->next) {
628                         if (not_first++)
629                                 fprintf(ofp, ", ");
630                         if (++count % 5 == 0)
631                                 fprintf(ofp, "\n\t    ");
632 
633                         fprintf(ofp, "$%s", f->name);
634                 }
635                 fprintf(ofp, ") = @_;\n\n");
636 
637                 fprintf(ofp, "\tprint_header($event_name, $common_cpu, "
638                         "$common_secs, $common_nsecs,\n\t             "
639                         "$common_pid, $common_comm, $common_callchain);\n\n");
640 
641                 fprintf(ofp, "\tprintf(\"");
642 
643                 not_first = 0;
644                 count = 0;
645 
646                 for (f = event->format.fields; f; f = f->next) {
647                         if (not_first++)
648                                 fprintf(ofp, ", ");
649                         if (count && count % 4 == 0) {
650                                 fprintf(ofp, "\".\n\t       \"");
651                         }
652                         count++;
653 
654                         fprintf(ofp, "%s=", f->name);
655                         if (f->flags & TEP_FIELD_IS_STRING ||
656                             f->flags & TEP_FIELD_IS_FLAG ||
657                             f->flags & TEP_FIELD_IS_SYMBOLIC)
658                                 fprintf(ofp, "%%s");
659                         else if (f->flags & TEP_FIELD_IS_SIGNED)
660                                 fprintf(ofp, "%%d");
661                         else
662                                 fprintf(ofp, "%%u");
663                 }
664 
665                 fprintf(ofp, "\\n\",\n\t       ");
666 
667                 not_first = 0;
668                 count = 0;
669 
670                 for (f = event->format.fields; f; f = f->next) {
671                         if (not_first++)
672                                 fprintf(ofp, ", ");
673 
674                         if (++count % 5 == 0)
675                                 fprintf(ofp, "\n\t       ");
676 
677                         if (f->flags & TEP_FIELD_IS_FLAG) {
678                                 if ((count - 1) % 5 != 0) {
679                                         fprintf(ofp, "\n\t       ");
680                                         count = 4;
681                                 }
682                                 fprintf(ofp, "flag_str(\"");
683                                 fprintf(ofp, "%s::%s\", ", event->system,
684                                         event->name);
685                                 fprintf(ofp, "\"%s\", $%s)", f->name,
686                                         f->name);
687                         } else if (f->flags & TEP_FIELD_IS_SYMBOLIC) {
688                                 if ((count - 1) % 5 != 0) {
689                                         fprintf(ofp, "\n\t       ");
690                                         count = 4;
691                                 }
692                                 fprintf(ofp, "symbol_str(\"");
693                                 fprintf(ofp, "%s::%s\", ", event->system,
694                                         event->name);
695                                 fprintf(ofp, "\"%s\", $%s)", f->name,
696                                         f->name);
697                         } else
698                                 fprintf(ofp, "$%s", f->name);
699                 }
700 
701                 fprintf(ofp, ");\n\n");
702 
703                 fprintf(ofp, "\tprint_backtrace($common_callchain);\n");
704 
705                 fprintf(ofp, "}\n\n");
706         }
707 
708         fprintf(ofp, "sub trace_unhandled\n{\n\tmy ($event_name, $context, "
709                 "$common_cpu, $common_secs, $common_nsecs,\n\t    "
710                 "$common_pid, $common_comm, $common_callchain) = @_;\n\n");
711 
712         fprintf(ofp, "\tprint_header($event_name, $common_cpu, "
713                 "$common_secs, $common_nsecs,\n\t             $common_pid, "
714                 "$common_comm, $common_callchain);\n");
715         fprintf(ofp, "\tprint_backtrace($common_callchain);\n");
716         fprintf(ofp, "}\n\n");
717 
718         fprintf(ofp, "sub print_header\n{\n"
719                 "\tmy ($event_name, $cpu, $secs, $nsecs, $pid, $comm) = @_;\n\n"
720                 "\tprintf(\"%%-20s %%5u %%05u.%%09u %%8u %%-20s \",\n\t       "
721                 "$event_name, $cpu, $secs, $nsecs, $pid, $comm);\n}\n");
722 
723         fprintf(ofp,
724                 "\n# Packed byte string args of process_event():\n"
725                 "#\n"
726                 "# $event:\tunion perf_event\tutil/event.h\n"
727                 "# $attr:\tstruct perf_event_attr\tlinux/perf_event.h\n"
728                 "# $sample:\tstruct perf_sample\tutil/event.h\n"
729                 "# $raw_data:\tperf_sample->raw_data\tutil/event.h\n"
730                 "\n"
731                 "sub process_event\n"
732                 "{\n"
733                 "\tmy ($event, $attr, $sample, $raw_data) = @_;\n"
734                 "\n"
735                 "\tmy @event\t= unpack(\"LSS\", $event);\n"
736                 "\tmy @attr\t= unpack(\"LLQQQQQLLQQ\", $attr);\n"
737                 "\tmy @sample\t= unpack(\"QLLQQQQQLL\", $sample);\n"
738                 "\tmy @raw_data\t= unpack(\"C*\", $raw_data);\n"
739                 "\n"
740                 "\tuse Data::Dumper;\n"
741                 "\tprint Dumper \\@event, \\@attr, \\@sample, \\@raw_data;\n"
742                 "}\n");
743 
744         fclose(ofp);
745 
746         fprintf(stderr, "generated Perl script: %s\n", fname);
747 
748         return 0;
749 }
750 
751 struct scripting_ops perl_scripting_ops = {
752         .name = "Perl",
753         .start_script = perl_start_script,
754         .flush_script = perl_flush_script,
755         .stop_script = perl_stop_script,
756         .process_event = perl_process_event,
757         .generate_script = perl_generate_script,
758 };
759 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp