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 && (map->dso->name || map->dso->long_name)) { 313 if (symbol_conf.show_kernel_path && map->dso->long_name) 314 dsoname = map->dso->long_name; 315 else if (map->dso->name) 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 die("ug! no event found for type %" PRIu64, (u64)evsel->attr.config); 355 356 pid = raw_field_value(event, "common_pid", data); 357 358 sprintf(handler, "%s::%s", event->system, event->name); 359 360 if (!test_and_set_bit(event->id, events_defined)) 361 define_event_symbols(event, handler, event->print_fmt.args); 362 363 s = nsecs / NSEC_PER_SEC; 364 ns = nsecs - s * NSEC_PER_SEC; 365 366 scripting_context->event_data = data; 367 scripting_context->pevent = evsel->tp_format->pevent; 368 369 ENTER; 370 SAVETMPS; 371 PUSHMARK(SP); 372 373 XPUSHs(sv_2mortal(newSVpv(handler, 0))); 374 XPUSHs(sv_2mortal(newSViv(PTR2IV(scripting_context)))); 375 XPUSHs(sv_2mortal(newSVuv(cpu))); 376 XPUSHs(sv_2mortal(newSVuv(s))); 377 XPUSHs(sv_2mortal(newSVuv(ns))); 378 XPUSHs(sv_2mortal(newSViv(pid))); 379 XPUSHs(sv_2mortal(newSVpv(comm, 0))); 380 XPUSHs(sv_2mortal(perl_process_callchain(sample, evsel, al))); 381 382 /* common fields other than pid can be accessed via xsub fns */ 383 384 for (field = event->format.fields; field; field = field->next) { 385 if (field->flags & FIELD_IS_STRING) { 386 int offset; 387 if (field->flags & FIELD_IS_DYNAMIC) { 388 offset = *(int *)(data + field->offset); 389 offset &= 0xffff; 390 } else 391 offset = field->offset; 392 XPUSHs(sv_2mortal(newSVpv((char *)data + offset, 0))); 393 } else { /* FIELD_IS_NUMERIC */ 394 val = read_size(event, data + field->offset, 395 field->size); 396 if (field->flags & FIELD_IS_SIGNED) { 397 XPUSHs(sv_2mortal(newSViv(val))); 398 } else { 399 XPUSHs(sv_2mortal(newSVuv(val))); 400 } 401 } 402 } 403 404 PUTBACK; 405 406 if (get_cv(handler, 0)) 407 call_pv(handler, G_SCALAR); 408 else if (get_cv("main::trace_unhandled", 0)) { 409 XPUSHs(sv_2mortal(newSVpv(handler, 0))); 410 XPUSHs(sv_2mortal(newSViv(PTR2IV(scripting_context)))); 411 XPUSHs(sv_2mortal(newSVuv(cpu))); 412 XPUSHs(sv_2mortal(newSVuv(nsecs))); 413 XPUSHs(sv_2mortal(newSViv(pid))); 414 XPUSHs(sv_2mortal(newSVpv(comm, 0))); 415 XPUSHs(sv_2mortal(perl_process_callchain(sample, evsel, al))); 416 call_pv("main::trace_unhandled", G_SCALAR); 417 } 418 SPAGAIN; 419 PUTBACK; 420 FREETMPS; 421 LEAVE; 422 } 423 424 static void perl_process_event_generic(union perf_event *event, 425 struct perf_sample *sample, 426 struct perf_evsel *evsel) 427 { 428 dSP; 429 430 if (!get_cv("process_event", 0)) 431 return; 432 433 ENTER; 434 SAVETMPS; 435 PUSHMARK(SP); 436 XPUSHs(sv_2mortal(newSVpvn((const char *)event, event->header.size))); 437 XPUSHs(sv_2mortal(newSVpvn((const char *)&evsel->attr, sizeof(evsel->attr)))); 438 XPUSHs(sv_2mortal(newSVpvn((const char *)sample, sizeof(*sample)))); 439 XPUSHs(sv_2mortal(newSVpvn((const char *)sample->raw_data, sample->raw_size))); 440 PUTBACK; 441 call_pv("process_event", G_SCALAR); 442 SPAGAIN; 443 PUTBACK; 444 FREETMPS; 445 LEAVE; 446 } 447 448 static void perl_process_event(union perf_event *event, 449 struct perf_sample *sample, 450 struct perf_evsel *evsel, 451 struct addr_location *al) 452 { 453 perl_process_tracepoint(sample, evsel, al); 454 perl_process_event_generic(event, sample, evsel); 455 } 456 457 static void run_start_sub(void) 458 { 459 dSP; /* access to Perl stack */ 460 PUSHMARK(SP); 461 462 if (get_cv("main::trace_begin", 0)) 463 call_pv("main::trace_begin", G_DISCARD | G_NOARGS); 464 } 465 466 /* 467 * Start trace script 468 */ 469 static int perl_start_script(const char *script, int argc, const char **argv) 470 { 471 const char **command_line; 472 int i, err = 0; 473 474 command_line = malloc((argc + 2) * sizeof(const char *)); 475 command_line[0] = ""; 476 command_line[1] = script; 477 for (i = 2; i < argc + 2; i++) 478 command_line[i] = argv[i - 2]; 479 480 my_perl = perl_alloc(); 481 perl_construct(my_perl); 482 483 if (perl_parse(my_perl, xs_init, argc + 2, (char **)command_line, 484 (char **)NULL)) { 485 err = -1; 486 goto error; 487 } 488 489 if (perl_run(my_perl)) { 490 err = -1; 491 goto error; 492 } 493 494 if (SvTRUE(ERRSV)) { 495 err = -1; 496 goto error; 497 } 498 499 run_start_sub(); 500 501 free(command_line); 502 return 0; 503 error: 504 perl_free(my_perl); 505 free(command_line); 506 507 return err; 508 } 509 510 static int perl_flush_script(void) 511 { 512 return 0; 513 } 514 515 /* 516 * Stop trace script 517 */ 518 static int perl_stop_script(void) 519 { 520 dSP; /* access to Perl stack */ 521 PUSHMARK(SP); 522 523 if (get_cv("main::trace_end", 0)) 524 call_pv("main::trace_end", G_DISCARD | G_NOARGS); 525 526 perl_destruct(my_perl); 527 perl_free(my_perl); 528 529 return 0; 530 } 531 532 static int perl_generate_script(struct pevent *pevent, const char *outfile) 533 { 534 struct event_format *event = NULL; 535 struct format_field *f; 536 char fname[PATH_MAX]; 537 int not_first, count; 538 FILE *ofp; 539 540 sprintf(fname, "%s.pl", outfile); 541 ofp = fopen(fname, "w"); 542 if (ofp == NULL) { 543 fprintf(stderr, "couldn't open %s\n", fname); 544 return -1; 545 } 546 547 fprintf(ofp, "# perf script event handlers, " 548 "generated by perf script -g perl\n"); 549 550 fprintf(ofp, "# Licensed under the terms of the GNU GPL" 551 " License version 2\n\n"); 552 553 fprintf(ofp, "# The common_* event handler fields are the most useful " 554 "fields common to\n"); 555 556 fprintf(ofp, "# all events. They don't necessarily correspond to " 557 "the 'common_*' fields\n"); 558 559 fprintf(ofp, "# in the format files. Those fields not available as " 560 "handler params can\n"); 561 562 fprintf(ofp, "# be retrieved using Perl functions of the form " 563 "common_*($context).\n"); 564 565 fprintf(ofp, "# See Context.pm for the list of available " 566 "functions.\n\n"); 567 568 fprintf(ofp, "use lib \"$ENV{'PERF_EXEC_PATH'}/scripts/perl/" 569 "Perf-Trace-Util/lib\";\n"); 570 571 fprintf(ofp, "use lib \"./Perf-Trace-Util/lib\";\n"); 572 fprintf(ofp, "use Perf::Trace::Core;\n"); 573 fprintf(ofp, "use Perf::Trace::Context;\n"); 574 fprintf(ofp, "use Perf::Trace::Util;\n\n"); 575 576 fprintf(ofp, "sub trace_begin\n{\n\t# optional\n}\n\n"); 577 fprintf(ofp, "sub trace_end\n{\n\t# optional\n}\n"); 578 579 580 fprintf(ofp, "\n\ 581 sub print_backtrace\n\ 582 {\n\ 583 my $callchain = shift;\n\ 584 for my $node (@$callchain)\n\ 585 {\n\ 586 if(exists $node->{sym})\n\ 587 {\n\ 588 printf( \"\\t[\\%%x] \\%%s\\n\", $node->{ip}, $node->{sym}{name});\n\ 589 }\n\ 590 else\n\ 591 {\n\ 592 printf( \"\\t[\\%%x]\\n\", $node{ip});\n\ 593 }\n\ 594 }\n\ 595 }\n\n\ 596 "); 597 598 599 while ((event = trace_find_next_event(pevent, event))) { 600 fprintf(ofp, "sub %s::%s\n{\n", event->system, event->name); 601 fprintf(ofp, "\tmy ("); 602 603 fprintf(ofp, "$event_name, "); 604 fprintf(ofp, "$context, "); 605 fprintf(ofp, "$common_cpu, "); 606 fprintf(ofp, "$common_secs, "); 607 fprintf(ofp, "$common_nsecs,\n"); 608 fprintf(ofp, "\t $common_pid, "); 609 fprintf(ofp, "$common_comm, "); 610 fprintf(ofp, "$common_callchain,\n\t "); 611 612 not_first = 0; 613 count = 0; 614 615 for (f = event->format.fields; f; f = f->next) { 616 if (not_first++) 617 fprintf(ofp, ", "); 618 if (++count % 5 == 0) 619 fprintf(ofp, "\n\t "); 620 621 fprintf(ofp, "$%s", f->name); 622 } 623 fprintf(ofp, ") = @_;\n\n"); 624 625 fprintf(ofp, "\tprint_header($event_name, $common_cpu, " 626 "$common_secs, $common_nsecs,\n\t " 627 "$common_pid, $common_comm, $common_callchain);\n\n"); 628 629 fprintf(ofp, "\tprintf(\""); 630 631 not_first = 0; 632 count = 0; 633 634 for (f = event->format.fields; f; f = f->next) { 635 if (not_first++) 636 fprintf(ofp, ", "); 637 if (count && count % 4 == 0) { 638 fprintf(ofp, "\".\n\t \""); 639 } 640 count++; 641 642 fprintf(ofp, "%s=", f->name); 643 if (f->flags & FIELD_IS_STRING || 644 f->flags & FIELD_IS_FLAG || 645 f->flags & FIELD_IS_SYMBOLIC) 646 fprintf(ofp, "%%s"); 647 else if (f->flags & FIELD_IS_SIGNED) 648 fprintf(ofp, "%%d"); 649 else 650 fprintf(ofp, "%%u"); 651 } 652 653 fprintf(ofp, "\\n\",\n\t "); 654 655 not_first = 0; 656 count = 0; 657 658 for (f = event->format.fields; f; f = f->next) { 659 if (not_first++) 660 fprintf(ofp, ", "); 661 662 if (++count % 5 == 0) 663 fprintf(ofp, "\n\t "); 664 665 if (f->flags & FIELD_IS_FLAG) { 666 if ((count - 1) % 5 != 0) { 667 fprintf(ofp, "\n\t "); 668 count = 4; 669 } 670 fprintf(ofp, "flag_str(\""); 671 fprintf(ofp, "%s::%s\", ", event->system, 672 event->name); 673 fprintf(ofp, "\"%s\", $%s)", f->name, 674 f->name); 675 } else if (f->flags & FIELD_IS_SYMBOLIC) { 676 if ((count - 1) % 5 != 0) { 677 fprintf(ofp, "\n\t "); 678 count = 4; 679 } 680 fprintf(ofp, "symbol_str(\""); 681 fprintf(ofp, "%s::%s\", ", event->system, 682 event->name); 683 fprintf(ofp, "\"%s\", $%s)", f->name, 684 f->name); 685 } else 686 fprintf(ofp, "$%s", f->name); 687 } 688 689 fprintf(ofp, ");\n\n"); 690 691 fprintf(ofp, "\tprint_backtrace($common_callchain);\n"); 692 693 fprintf(ofp, "}\n\n"); 694 } 695 696 fprintf(ofp, "sub trace_unhandled\n{\n\tmy ($event_name, $context, " 697 "$common_cpu, $common_secs, $common_nsecs,\n\t " 698 "$common_pid, $common_comm, $common_callchain) = @_;\n\n"); 699 700 fprintf(ofp, "\tprint_header($event_name, $common_cpu, " 701 "$common_secs, $common_nsecs,\n\t $common_pid, " 702 "$common_comm, $common_callchain);\n"); 703 fprintf(ofp, "\tprint_backtrace($common_callchain);\n"); 704 fprintf(ofp, "}\n\n"); 705 706 fprintf(ofp, "sub print_header\n{\n" 707 "\tmy ($event_name, $cpu, $secs, $nsecs, $pid, $comm) = @_;\n\n" 708 "\tprintf(\"%%-20s %%5u %%05u.%%09u %%8u %%-20s \",\n\t " 709 "$event_name, $cpu, $secs, $nsecs, $pid, $comm);\n}\n"); 710 711 fprintf(ofp, 712 "\n# Packed byte string args of process_event():\n" 713 "#\n" 714 "# $event:\tunion perf_event\tutil/event.h\n" 715 "# $attr:\tstruct perf_event_attr\tlinux/perf_event.h\n" 716 "# $sample:\tstruct perf_sample\tutil/event.h\n" 717 "# $raw_data:\tperf_sample->raw_data\tutil/event.h\n" 718 "\n" 719 "sub process_event\n" 720 "{\n" 721 "\tmy ($event, $attr, $sample, $raw_data) = @_;\n" 722 "\n" 723 "\tmy @event\t= unpack(\"LSS\", $event);\n" 724 "\tmy @attr\t= unpack(\"LLQQQQQLLQQ\", $attr);\n" 725 "\tmy @sample\t= unpack(\"QLLQQQQQLL\", $sample);\n" 726 "\tmy @raw_data\t= unpack(\"C*\", $raw_data);\n" 727 "\n" 728 "\tuse Data::Dumper;\n" 729 "\tprint Dumper \\@event, \\@attr, \\@sample, \\@raw_data;\n" 730 "}\n"); 731 732 fclose(ofp); 733 734 fprintf(stderr, "generated Perl script: %s\n", fname); 735 736 return 0; 737 } 738 739 struct scripting_ops perl_scripting_ops = { 740 .name = "Perl", 741 .start_script = perl_start_script, 742 .flush_script = perl_flush_script, 743 .stop_script = perl_stop_script, 744 .process_event = perl_process_event, 745 .generate_script = perl_generate_script, 746 }; 747