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 #include <event-parse.h> 31 32 #include <stdbool.h> 33 /* perl needs the following define, right after including stdbool.h */ 34 #define HAS_BOOL 35 #include <EXTERN.h> 36 #include <perl.h> 37 38 #include "../callchain.h" 39 #include "../dso.h" 40 #include "../machine.h" 41 #include "../map.h" 42 #include "../symbol.h" 43 #include "../thread.h" 44 #include "../event.h" 45 #include "../trace-event.h" 46 #include "../evsel.h" 47 #include "../debug.h" 48 49 void boot_Perf__Trace__Context(pTHX_ CV *cv); 50 void boot_DynaLoader(pTHX_ CV *cv); 51 typedef PerlInterpreter * INTERP; 52 53 void xs_init(pTHX); 54 55 void xs_init(pTHX) 56 { 57 const char *file = __FILE__; 58 dXSUB_SYS; 59 60 newXS("Perf::Trace::Context::bootstrap", boot_Perf__Trace__Context, 61 file); 62 newXS("DynaLoader::boot_DynaLoader", boot_DynaLoader, file); 63 } 64 65 INTERP my_perl; 66 67 #define TRACE_EVENT_TYPE_MAX \ 68 ((1 << (sizeof(unsigned short) * 8)) - 1) 69 70 extern struct scripting_context *scripting_context; 71 72 static char *cur_field_name; 73 static int zero_flag_atom; 74 75 static void define_symbolic_value(const char *ev_name, 76 const char *field_name, 77 const char *field_value, 78 const char *field_str) 79 { 80 unsigned long long value; 81 dSP; 82 83 value = eval_flag(field_value); 84 85 ENTER; 86 SAVETMPS; 87 PUSHMARK(SP); 88 89 XPUSHs(sv_2mortal(newSVpv(ev_name, 0))); 90 XPUSHs(sv_2mortal(newSVpv(field_name, 0))); 91 XPUSHs(sv_2mortal(newSVuv(value))); 92 XPUSHs(sv_2mortal(newSVpv(field_str, 0))); 93 94 PUTBACK; 95 if (get_cv("main::define_symbolic_value", 0)) 96 call_pv("main::define_symbolic_value", G_SCALAR); 97 SPAGAIN; 98 PUTBACK; 99 FREETMPS; 100 LEAVE; 101 } 102 103 static void define_symbolic_values(struct tep_print_flag_sym *field, 104 const char *ev_name, 105 const char *field_name) 106 { 107 define_symbolic_value(ev_name, field_name, field->value, field->str); 108 if (field->next) 109 define_symbolic_values(field->next, ev_name, field_name); 110 } 111 112 static void define_symbolic_field(const char *ev_name, 113 const char *field_name) 114 { 115 dSP; 116 117 ENTER; 118 SAVETMPS; 119 PUSHMARK(SP); 120 121 XPUSHs(sv_2mortal(newSVpv(ev_name, 0))); 122 XPUSHs(sv_2mortal(newSVpv(field_name, 0))); 123 124 PUTBACK; 125 if (get_cv("main::define_symbolic_field", 0)) 126 call_pv("main::define_symbolic_field", G_SCALAR); 127 SPAGAIN; 128 PUTBACK; 129 FREETMPS; 130 LEAVE; 131 } 132 133 static void define_flag_value(const char *ev_name, 134 const char *field_name, 135 const char *field_value, 136 const char *field_str) 137 { 138 unsigned long long value; 139 dSP; 140 141 value = eval_flag(field_value); 142 143 ENTER; 144 SAVETMPS; 145 PUSHMARK(SP); 146 147 XPUSHs(sv_2mortal(newSVpv(ev_name, 0))); 148 XPUSHs(sv_2mortal(newSVpv(field_name, 0))); 149 XPUSHs(sv_2mortal(newSVuv(value))); 150 XPUSHs(sv_2mortal(newSVpv(field_str, 0))); 151 152 PUTBACK; 153 if (get_cv("main::define_flag_value", 0)) 154 call_pv("main::define_flag_value", G_SCALAR); 155 SPAGAIN; 156 PUTBACK; 157 FREETMPS; 158 LEAVE; 159 } 160 161 static void define_flag_values(struct tep_print_flag_sym *field, 162 const char *ev_name, 163 const char *field_name) 164 { 165 define_flag_value(ev_name, field_name, field->value, field->str); 166 if (field->next) 167 define_flag_values(field->next, ev_name, field_name); 168 } 169 170 static void define_flag_field(const char *ev_name, 171 const char *field_name, 172 const char *delim) 173 { 174 dSP; 175 176 ENTER; 177 SAVETMPS; 178 PUSHMARK(SP); 179 180 XPUSHs(sv_2mortal(newSVpv(ev_name, 0))); 181 XPUSHs(sv_2mortal(newSVpv(field_name, 0))); 182 XPUSHs(sv_2mortal(newSVpv(delim, 0))); 183 184 PUTBACK; 185 if (get_cv("main::define_flag_field", 0)) 186 call_pv("main::define_flag_field", G_SCALAR); 187 SPAGAIN; 188 PUTBACK; 189 FREETMPS; 190 LEAVE; 191 } 192 193 static void define_event_symbols(struct tep_event *event, 194 const char *ev_name, 195 struct tep_print_arg *args) 196 { 197 if (args == NULL) 198 return; 199 200 switch (args->type) { 201 case TEP_PRINT_NULL: 202 break; 203 case TEP_PRINT_ATOM: 204 define_flag_value(ev_name, cur_field_name, "0", 205 args->atom.atom); 206 zero_flag_atom = 0; 207 break; 208 case TEP_PRINT_FIELD: 209 free(cur_field_name); 210 cur_field_name = strdup(args->field.name); 211 break; 212 case TEP_PRINT_FLAGS: 213 define_event_symbols(event, ev_name, args->flags.field); 214 define_flag_field(ev_name, cur_field_name, args->flags.delim); 215 define_flag_values(args->flags.flags, ev_name, cur_field_name); 216 break; 217 case TEP_PRINT_SYMBOL: 218 define_event_symbols(event, ev_name, args->symbol.field); 219 define_symbolic_field(ev_name, cur_field_name); 220 define_symbolic_values(args->symbol.symbols, ev_name, 221 cur_field_name); 222 break; 223 case TEP_PRINT_HEX: 224 case TEP_PRINT_HEX_STR: 225 define_event_symbols(event, ev_name, args->hex.field); 226 define_event_symbols(event, ev_name, args->hex.size); 227 break; 228 case TEP_PRINT_INT_ARRAY: 229 define_event_symbols(event, ev_name, args->int_array.field); 230 define_event_symbols(event, ev_name, args->int_array.count); 231 define_event_symbols(event, ev_name, args->int_array.el_size); 232 break; 233 case TEP_PRINT_BSTRING: 234 case TEP_PRINT_DYNAMIC_ARRAY: 235 case TEP_PRINT_DYNAMIC_ARRAY_LEN: 236 case TEP_PRINT_STRING: 237 case TEP_PRINT_BITMASK: 238 break; 239 case TEP_PRINT_TYPE: 240 define_event_symbols(event, ev_name, args->typecast.item); 241 break; 242 case TEP_PRINT_OP: 243 if (strcmp(args->op.op, ":") == 0) 244 zero_flag_atom = 1; 245 define_event_symbols(event, ev_name, args->op.left); 246 define_event_symbols(event, ev_name, args->op.right); 247 break; 248 case TEP_PRINT_FUNC: 249 default: 250 pr_err("Unsupported print arg type\n"); 251 /* we should warn... */ 252 return; 253 } 254 255 if (args->next) 256 define_event_symbols(event, ev_name, args->next); 257 } 258 259 static SV *perl_process_callchain(struct perf_sample *sample, 260 struct addr_location *al) 261 { 262 struct callchain_cursor *cursor; 263 AV *list; 264 265 list = newAV(); 266 if (!list) 267 goto exit; 268 269 if (!symbol_conf.use_callchain || !sample->callchain) 270 goto exit; 271 272 cursor = get_tls_callchain_cursor(); 273 274 if (thread__resolve_callchain(al->thread, cursor, 275 sample, NULL, NULL, scripting_max_stack) != 0) { 276 pr_err("Failed to resolve callchain. Skipping\n"); 277 goto exit; 278 } 279 callchain_cursor_commit(cursor); 280 281 282 while (1) { 283 HV *elem; 284 struct callchain_cursor_node *node; 285 node = callchain_cursor_current(cursor); 286 if (!node) 287 break; 288 289 elem = newHV(); 290 if (!elem) 291 goto exit; 292 293 if (!hv_stores(elem, "ip", newSVuv(node->ip))) { 294 hv_undef(elem); 295 goto exit; 296 } 297 298 if (node->ms.sym) { 299 HV *sym = newHV(); 300 if (!sym) { 301 hv_undef(elem); 302 goto exit; 303 } 304 if (!hv_stores(sym, "start", newSVuv(node->ms.sym->start)) || 305 !hv_stores(sym, "end", newSVuv(node->ms.sym->end)) || 306 !hv_stores(sym, "binding", newSVuv(symbol__binding(node->ms.sym))) || 307 !hv_stores(sym, "name", newSVpvn(node->ms.sym->name, 308 node->ms.sym->namelen)) || 309 !hv_stores(elem, "sym", newRV_noinc((SV*)sym))) { 310 hv_undef(sym); 311 hv_undef(elem); 312 goto exit; 313 } 314 } 315 316 if (node->ms.map) { 317 struct map *map = node->ms.map; 318 struct dso *dso = map ? map__dso(map) : NULL; 319 const char *dsoname = "[unknown]"; 320 321 if (dso) { 322 if (symbol_conf.show_kernel_path && dso__long_name(dso)) 323 dsoname = dso__long_name(dso); 324 else 325 dsoname = dso__name(dso); 326 } 327 if (!hv_stores(elem, "dso", newSVpv(dsoname,0))) { 328 hv_undef(elem); 329 goto exit; 330 } 331 } 332 333 callchain_cursor_advance(cursor); 334 av_push(list, newRV_noinc((SV*)elem)); 335 } 336 337 exit: 338 return newRV_noinc((SV*)list); 339 } 340 341 static void perl_process_tracepoint(struct perf_sample *sample, 342 struct addr_location *al) 343 { 344 struct thread *thread = al->thread; 345 struct tep_event *event; 346 struct tep_format_field *field; 347 static char handler[256]; 348 unsigned long long val; 349 unsigned long s, ns; 350 int pid; 351 int cpu = sample->cpu; 352 void *data = sample->raw_data; 353 unsigned long long nsecs = sample->time; 354 const char *comm = thread__comm_str(thread); 355 DECLARE_BITMAP(events_defined, TRACE_EVENT_TYPE_MAX); 356 struct evsel *evsel = sample->evsel; 357 358 bitmap_zero(events_defined, TRACE_EVENT_TYPE_MAX); 359 dSP; 360 361 if (evsel->core.attr.type != PERF_TYPE_TRACEPOINT) 362 return; 363 364 event = evsel__tp_format(evsel); 365 if (!event) { 366 pr_debug("ug! no event found for type %" PRIu64, (u64)evsel->core.attr.config); 367 return; 368 } 369 370 pid = raw_field_value(event, "common_pid", data); 371 372 sprintf(handler, "%s::%s", event->system, event->name); 373 374 if (!__test_and_set_bit(event->id, events_defined)) 375 define_event_symbols(event, handler, event->print_fmt.args); 376 377 s = nsecs / NSEC_PER_SEC; 378 ns = nsecs - s * NSEC_PER_SEC; 379 380 ENTER; 381 SAVETMPS; 382 PUSHMARK(SP); 383 384 XPUSHs(sv_2mortal(newSVpv(handler, 0))); 385 XPUSHs(sv_2mortal(newSViv(PTR2IV(scripting_context)))); 386 XPUSHs(sv_2mortal(newSVuv(cpu))); 387 XPUSHs(sv_2mortal(newSVuv(s))); 388 XPUSHs(sv_2mortal(newSVuv(ns))); 389 XPUSHs(sv_2mortal(newSViv(pid))); 390 XPUSHs(sv_2mortal(newSVpv(comm, 0))); 391 XPUSHs(sv_2mortal(perl_process_callchain(sample, al))); 392 393 /* common fields other than pid can be accessed via xsub fns */ 394 395 for (field = event->format.fields; field; field = field->next) { 396 if (field->flags & TEP_FIELD_IS_STRING) { 397 int offset; 398 if (field->flags & TEP_FIELD_IS_DYNAMIC) { 399 offset = *(int *)(data + field->offset); 400 offset &= 0xffff; 401 if (tep_field_is_relative(field->flags)) 402 offset += field->offset + field->size; 403 } else 404 offset = field->offset; 405 XPUSHs(sv_2mortal(newSVpv((char *)data + offset, 0))); 406 } else { /* FIELD_IS_NUMERIC */ 407 val = read_size(event, data + field->offset, 408 field->size); 409 if (field->flags & TEP_FIELD_IS_SIGNED) { 410 XPUSHs(sv_2mortal(newSViv(val))); 411 } else { 412 XPUSHs(sv_2mortal(newSVuv(val))); 413 } 414 } 415 } 416 417 PUTBACK; 418 419 if (get_cv(handler, 0)) 420 call_pv(handler, G_SCALAR); 421 else if (get_cv("main::trace_unhandled", 0)) { 422 XPUSHs(sv_2mortal(newSVpv(handler, 0))); 423 XPUSHs(sv_2mortal(newSViv(PTR2IV(scripting_context)))); 424 XPUSHs(sv_2mortal(newSVuv(cpu))); 425 XPUSHs(sv_2mortal(newSVuv(nsecs))); 426 XPUSHs(sv_2mortal(newSViv(pid))); 427 XPUSHs(sv_2mortal(newSVpv(comm, 0))); 428 XPUSHs(sv_2mortal(perl_process_callchain(sample, al))); 429 call_pv("main::trace_unhandled", G_SCALAR); 430 } 431 SPAGAIN; 432 PUTBACK; 433 FREETMPS; 434 LEAVE; 435 } 436 437 static void perl_process_event_generic(union perf_event *event, struct perf_sample *sample) 438 { 439 dSP; 440 441 if (!get_cv("process_event", 0)) 442 return; 443 444 ENTER; 445 SAVETMPS; 446 PUSHMARK(SP); 447 XPUSHs(sv_2mortal(newSVpvn((const char *)event, event->header.size))); 448 XPUSHs(sv_2mortal(newSVpvn((const char *)&sample->evsel->core.attr, 449 sizeof(sample->evsel->core.attr)))); 450 XPUSHs(sv_2mortal(newSVpvn((const char *)sample, sizeof(*sample)))); 451 XPUSHs(sv_2mortal(newSVpvn((const char *)sample->raw_data, sample->raw_size))); 452 PUTBACK; 453 call_pv("process_event", G_SCALAR); 454 SPAGAIN; 455 PUTBACK; 456 FREETMPS; 457 LEAVE; 458 } 459 460 static void perl_process_event(union perf_event *event, 461 struct perf_sample *sample, 462 struct addr_location *al, 463 struct addr_location *addr_al) 464 { 465 scripting_context__update(scripting_context, event, sample, al, addr_al); 466 perl_process_tracepoint(sample, al); 467 perl_process_event_generic(event, sample); 468 } 469 470 static void run_start_sub(void) 471 { 472 dSP; /* access to Perl stack */ 473 PUSHMARK(SP); 474 475 if (get_cv("main::trace_begin", 0)) 476 call_pv("main::trace_begin", G_DISCARD | G_NOARGS); 477 } 478 479 /* 480 * Start trace script 481 */ 482 static int perl_start_script(const char *script, int argc, const char **argv, 483 struct perf_session *session) 484 { 485 const char **command_line; 486 int i, err = 0; 487 488 scripting_context->session = session; 489 490 command_line = malloc((argc + 2) * sizeof(const char *)); 491 if (!command_line) 492 return -ENOMEM; 493 494 command_line[0] = ""; 495 command_line[1] = script; 496 for (i = 2; i < argc + 2; i++) 497 command_line[i] = argv[i - 2]; 498 499 my_perl = perl_alloc(); 500 perl_construct(my_perl); 501 502 if (perl_parse(my_perl, xs_init, argc + 2, (char **)command_line, 503 (char **)NULL)) { 504 err = -1; 505 goto error; 506 } 507 508 if (perl_run(my_perl)) { 509 err = -1; 510 goto error; 511 } 512 513 if (SvTRUE(ERRSV)) { 514 err = -1; 515 goto error; 516 } 517 518 run_start_sub(); 519 520 free(command_line); 521 return 0; 522 error: 523 perl_free(my_perl); 524 free(command_line); 525 526 return err; 527 } 528 529 static int perl_flush_script(void) 530 { 531 return 0; 532 } 533 534 /* 535 * Stop trace script 536 */ 537 static int perl_stop_script(void) 538 { 539 dSP; /* access to Perl stack */ 540 PUSHMARK(SP); 541 542 if (get_cv("main::trace_end", 0)) 543 call_pv("main::trace_end", G_DISCARD | G_NOARGS); 544 545 perl_destruct(my_perl); 546 perl_free(my_perl); 547 548 return 0; 549 } 550 551 static int perl_generate_script(struct tep_handle *pevent, const char *outfile) 552 { 553 int i, not_first, count, nr_events; 554 struct tep_event **all_events; 555 struct tep_event *event = NULL; 556 struct tep_format_field *f; 557 char fname[PATH_MAX]; 558 FILE *ofp; 559 560 sprintf(fname, "%s.pl", outfile); 561 ofp = fopen(fname, "w"); 562 if (ofp == NULL) { 563 fprintf(stderr, "couldn't open %s\n", fname); 564 return -1; 565 } 566 567 fprintf(ofp, "# perf script event handlers, " 568 "generated by perf script -g perl\n"); 569 570 fprintf(ofp, "# Licensed under the terms of the GNU GPL" 571 " License version 2\n\n"); 572 573 fprintf(ofp, "# The common_* event handler fields are the most useful " 574 "fields common to\n"); 575 576 fprintf(ofp, "# all events. They don't necessarily correspond to " 577 "the 'common_*' fields\n"); 578 579 fprintf(ofp, "# in the format files. Those fields not available as " 580 "handler params can\n"); 581 582 fprintf(ofp, "# be retrieved using Perl functions of the form " 583 "common_*($context).\n"); 584 585 fprintf(ofp, "# See Context.pm for the list of available " 586 "functions.\n\n"); 587 588 fprintf(ofp, "use lib \"$ENV{'PERF_EXEC_PATH'}/scripts/perl/" 589 "Perf-Trace-Util/lib\";\n"); 590 591 fprintf(ofp, "use lib \"./Perf-Trace-Util/lib\";\n"); 592 fprintf(ofp, "use Perf::Trace::Core;\n"); 593 fprintf(ofp, "use Perf::Trace::Context;\n"); 594 fprintf(ofp, "use Perf::Trace::Util;\n\n"); 595 596 fprintf(ofp, "sub trace_begin\n{\n\t# optional\n}\n\n"); 597 fprintf(ofp, "sub trace_end\n{\n\t# optional\n}\n"); 598 599 600 fprintf(ofp, "\n\ 601 sub print_backtrace\n\ 602 {\n\ 603 my $callchain = shift;\n\ 604 for my $node (@$callchain)\n\ 605 {\n\ 606 if(exists $node->{sym})\n\ 607 {\n\ 608 printf( \"\\t[\\%%x] \\%%s\\n\", $node->{ip}, $node->{sym}{name});\n\ 609 }\n\ 610 else\n\ 611 {\n\ 612 printf( \"\\t[\\%%x]\\n\", $node{ip});\n\ 613 }\n\ 614 }\n\ 615 }\n\n\ 616 "); 617 618 nr_events = tep_get_events_count(pevent); 619 all_events = tep_list_events(pevent, TEP_EVENT_SORT_ID); 620 621 for (i = 0; all_events && i < nr_events; i++) { 622 event = all_events[i]; 623 fprintf(ofp, "sub %s::%s\n{\n", event->system, event->name); 624 fprintf(ofp, "\tmy ("); 625 626 fprintf(ofp, "$event_name, "); 627 fprintf(ofp, "$context, "); 628 fprintf(ofp, "$common_cpu, "); 629 fprintf(ofp, "$common_secs, "); 630 fprintf(ofp, "$common_nsecs,\n"); 631 fprintf(ofp, "\t $common_pid, "); 632 fprintf(ofp, "$common_comm, "); 633 fprintf(ofp, "$common_callchain,\n\t "); 634 635 not_first = 0; 636 count = 0; 637 638 for (f = event->format.fields; f; f = f->next) { 639 if (not_first++) 640 fprintf(ofp, ", "); 641 if (++count % 5 == 0) 642 fprintf(ofp, "\n\t "); 643 644 fprintf(ofp, "$%s", f->name); 645 } 646 fprintf(ofp, ") = @_;\n\n"); 647 648 fprintf(ofp, "\tprint_header($event_name, $common_cpu, " 649 "$common_secs, $common_nsecs,\n\t " 650 "$common_pid, $common_comm, $common_callchain);\n\n"); 651 652 fprintf(ofp, "\tprintf(\""); 653 654 not_first = 0; 655 count = 0; 656 657 for (f = event->format.fields; f; f = f->next) { 658 if (not_first++) 659 fprintf(ofp, ", "); 660 if (count && count % 4 == 0) { 661 fprintf(ofp, "\".\n\t \""); 662 } 663 count++; 664 665 fprintf(ofp, "%s=", f->name); 666 if (f->flags & TEP_FIELD_IS_STRING || 667 f->flags & TEP_FIELD_IS_FLAG || 668 f->flags & TEP_FIELD_IS_SYMBOLIC) 669 fprintf(ofp, "%%s"); 670 else if (f->flags & TEP_FIELD_IS_SIGNED) 671 fprintf(ofp, "%%d"); 672 else 673 fprintf(ofp, "%%u"); 674 } 675 676 fprintf(ofp, "\\n\",\n\t "); 677 678 not_first = 0; 679 count = 0; 680 681 for (f = event->format.fields; f; f = f->next) { 682 if (not_first++) 683 fprintf(ofp, ", "); 684 685 if (++count % 5 == 0) 686 fprintf(ofp, "\n\t "); 687 688 if (f->flags & TEP_FIELD_IS_FLAG) { 689 if ((count - 1) % 5 != 0) { 690 fprintf(ofp, "\n\t "); 691 count = 4; 692 } 693 fprintf(ofp, "flag_str(\""); 694 fprintf(ofp, "%s::%s\", ", event->system, 695 event->name); 696 fprintf(ofp, "\"%s\", $%s)", f->name, 697 f->name); 698 } else if (f->flags & TEP_FIELD_IS_SYMBOLIC) { 699 if ((count - 1) % 5 != 0) { 700 fprintf(ofp, "\n\t "); 701 count = 4; 702 } 703 fprintf(ofp, "symbol_str(\""); 704 fprintf(ofp, "%s::%s\", ", event->system, 705 event->name); 706 fprintf(ofp, "\"%s\", $%s)", f->name, 707 f->name); 708 } else 709 fprintf(ofp, "$%s", f->name); 710 } 711 712 fprintf(ofp, ");\n\n"); 713 714 fprintf(ofp, "\tprint_backtrace($common_callchain);\n"); 715 716 fprintf(ofp, "}\n\n"); 717 } 718 719 fprintf(ofp, "sub trace_unhandled\n{\n\tmy ($event_name, $context, " 720 "$common_cpu, $common_secs, $common_nsecs,\n\t " 721 "$common_pid, $common_comm, $common_callchain) = @_;\n\n"); 722 723 fprintf(ofp, "\tprint_header($event_name, $common_cpu, " 724 "$common_secs, $common_nsecs,\n\t $common_pid, " 725 "$common_comm, $common_callchain);\n"); 726 fprintf(ofp, "\tprint_backtrace($common_callchain);\n"); 727 fprintf(ofp, "}\n\n"); 728 729 fprintf(ofp, "sub print_header\n{\n" 730 "\tmy ($event_name, $cpu, $secs, $nsecs, $pid, $comm) = @_;\n\n" 731 "\tprintf(\"%%-20s %%5u %%05u.%%09u %%8u %%-20s \",\n\t " 732 "$event_name, $cpu, $secs, $nsecs, $pid, $comm);\n}\n"); 733 734 fprintf(ofp, 735 "\n# Packed byte string args of process_event():\n" 736 "#\n" 737 "# $event:\tunion perf_event\tutil/event.h\n" 738 "# $attr:\tstruct perf_event_attr\tlinux/perf_event.h\n" 739 "# $sample:\tstruct perf_sample\tutil/event.h\n" 740 "# $raw_data:\tperf_sample->raw_data\tutil/event.h\n" 741 "\n" 742 "sub process_event\n" 743 "{\n" 744 "\tmy ($event, $attr, $sample, $raw_data) = @_;\n" 745 "\n" 746 "\tmy @event\t= unpack(\"LSS\", $event);\n" 747 "\tmy @attr\t= unpack(\"LLQQQQQLLQQ\", $attr);\n" 748 "\tmy @sample\t= unpack(\"QLLQQQQQLL\", $sample);\n" 749 "\tmy @raw_data\t= unpack(\"C*\", $raw_data);\n" 750 "\n" 751 "\tuse Data::Dumper;\n" 752 "\tprint Dumper \\@event, \\@attr, \\@sample, \\@raw_data;\n" 753 "}\n"); 754 755 fclose(ofp); 756 757 fprintf(stderr, "generated Perl script: %s\n", fname); 758 759 return 0; 760 } 761 762 struct scripting_ops perl_scripting_ops = { 763 .name = "Perl", 764 .dirname = "perl", 765 .start_script = perl_start_script, 766 .flush_script = perl_flush_script, 767 .stop_script = perl_stop_script, 768 .process_event = perl_process_event, 769 .generate_script = perl_generate_script, 770 }; 771