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