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 case PRINT_HEX_STR: 221 define_event_symbols(event, ev_name, args->hex.field); 222 define_event_symbols(event, ev_name, args->hex.size); 223 break; 224 case PRINT_INT_ARRAY: 225 define_event_symbols(event, ev_name, args->int_array.field); 226 define_event_symbols(event, ev_name, args->int_array.count); 227 define_event_symbols(event, ev_name, args->int_array.el_size); 228 break; 229 case PRINT_BSTRING: 230 case PRINT_DYNAMIC_ARRAY: 231 case PRINT_DYNAMIC_ARRAY_LEN: 232 case PRINT_STRING: 233 case PRINT_BITMASK: 234 break; 235 case PRINT_TYPE: 236 define_event_symbols(event, ev_name, args->typecast.item); 237 break; 238 case PRINT_OP: 239 if (strcmp(args->op.op, ":") == 0) 240 zero_flag_atom = 1; 241 define_event_symbols(event, ev_name, args->op.left); 242 define_event_symbols(event, ev_name, args->op.right); 243 break; 244 case PRINT_FUNC: 245 default: 246 pr_err("Unsupported print arg type\n"); 247 /* we should warn... */ 248 return; 249 } 250 251 if (args->next) 252 define_event_symbols(event, ev_name, args->next); 253 } 254 255 static SV *perl_process_callchain(struct perf_sample *sample, 256 struct perf_evsel *evsel, 257 struct addr_location *al) 258 { 259 AV *list; 260 261 list = newAV(); 262 if (!list) 263 goto exit; 264 265 if (!symbol_conf.use_callchain || !sample->callchain) 266 goto exit; 267 268 if (thread__resolve_callchain(al->thread, &callchain_cursor, evsel, 269 sample, NULL, NULL, scripting_max_stack) != 0) { 270 pr_err("Failed to resolve callchain. Skipping\n"); 271 goto exit; 272 } 273 callchain_cursor_commit(&callchain_cursor); 274 275 276 while (1) { 277 HV *elem; 278 struct callchain_cursor_node *node; 279 node = callchain_cursor_current(&callchain_cursor); 280 if (!node) 281 break; 282 283 elem = newHV(); 284 if (!elem) 285 goto exit; 286 287 if (!hv_stores(elem, "ip", newSVuv(node->ip))) { 288 hv_undef(elem); 289 goto exit; 290 } 291 292 if (node->sym) { 293 HV *sym = newHV(); 294 if (!sym) { 295 hv_undef(elem); 296 goto exit; 297 } 298 if (!hv_stores(sym, "start", newSVuv(node->sym->start)) || 299 !hv_stores(sym, "end", newSVuv(node->sym->end)) || 300 !hv_stores(sym, "binding", newSVuv(node->sym->binding)) || 301 !hv_stores(sym, "name", newSVpvn(node->sym->name, 302 node->sym->namelen)) || 303 !hv_stores(elem, "sym", newRV_noinc((SV*)sym))) { 304 hv_undef(sym); 305 hv_undef(elem); 306 goto exit; 307 } 308 } 309 310 if (node->map) { 311 struct map *map = node->map; 312 const char *dsoname = "[unknown]"; 313 if (map && map->dso) { 314 if (symbol_conf.show_kernel_path && map->dso->long_name) 315 dsoname = map->dso->long_name; 316 else 317 dsoname = map->dso->name; 318 } 319 if (!hv_stores(elem, "dso", newSVpv(dsoname,0))) { 320 hv_undef(elem); 321 goto exit; 322 } 323 } 324 325 callchain_cursor_advance(&callchain_cursor); 326 av_push(list, newRV_noinc((SV*)elem)); 327 } 328 329 exit: 330 return newRV_noinc((SV*)list); 331 } 332 333 static void perl_process_tracepoint(struct perf_sample *sample, 334 struct perf_evsel *evsel, 335 struct addr_location *al) 336 { 337 struct thread *thread = al->thread; 338 struct event_format *event = evsel->tp_format; 339 struct format_field *field; 340 static char handler[256]; 341 unsigned long long val; 342 unsigned long s, ns; 343 int pid; 344 int cpu = sample->cpu; 345 void *data = sample->raw_data; 346 unsigned long long nsecs = sample->time; 347 const char *comm = thread__comm_str(thread); 348 349 dSP; 350 351 if (evsel->attr.type != PERF_TYPE_TRACEPOINT) 352 return; 353 354 if (!event) { 355 pr_debug("ug! no event found for type %" PRIu64, (u64)evsel->attr.config); 356 return; 357 } 358 359 pid = raw_field_value(event, "common_pid", data); 360 361 sprintf(handler, "%s::%s", event->system, event->name); 362 363 if (!test_and_set_bit(event->id, events_defined)) 364 define_event_symbols(event, handler, event->print_fmt.args); 365 366 s = nsecs / NSEC_PER_SEC; 367 ns = nsecs - s * NSEC_PER_SEC; 368 369 scripting_context->event_data = data; 370 scripting_context->pevent = evsel->tp_format->pevent; 371 372 ENTER; 373 SAVETMPS; 374 PUSHMARK(SP); 375 376 XPUSHs(sv_2mortal(newSVpv(handler, 0))); 377 XPUSHs(sv_2mortal(newSViv(PTR2IV(scripting_context)))); 378 XPUSHs(sv_2mortal(newSVuv(cpu))); 379 XPUSHs(sv_2mortal(newSVuv(s))); 380 XPUSHs(sv_2mortal(newSVuv(ns))); 381 XPUSHs(sv_2mortal(newSViv(pid))); 382 XPUSHs(sv_2mortal(newSVpv(comm, 0))); 383 XPUSHs(sv_2mortal(perl_process_callchain(sample, evsel, al))); 384 385 /* common fields other than pid can be accessed via xsub fns */ 386 387 for (field = event->format.fields; field; field = field->next) { 388 if (field->flags & FIELD_IS_STRING) { 389 int offset; 390 if (field->flags & FIELD_IS_DYNAMIC) { 391 offset = *(int *)(data + field->offset); 392 offset &= 0xffff; 393 } else 394 offset = field->offset; 395 XPUSHs(sv_2mortal(newSVpv((char *)data + offset, 0))); 396 } else { /* FIELD_IS_NUMERIC */ 397 val = read_size(event, data + field->offset, 398 field->size); 399 if (field->flags & FIELD_IS_SIGNED) { 400 XPUSHs(sv_2mortal(newSViv(val))); 401 } else { 402 XPUSHs(sv_2mortal(newSVuv(val))); 403 } 404 } 405 } 406 407 PUTBACK; 408 409 if (get_cv(handler, 0)) 410 call_pv(handler, G_SCALAR); 411 else if (get_cv("main::trace_unhandled", 0)) { 412 XPUSHs(sv_2mortal(newSVpv(handler, 0))); 413 XPUSHs(sv_2mortal(newSViv(PTR2IV(scripting_context)))); 414 XPUSHs(sv_2mortal(newSVuv(cpu))); 415 XPUSHs(sv_2mortal(newSVuv(nsecs))); 416 XPUSHs(sv_2mortal(newSViv(pid))); 417 XPUSHs(sv_2mortal(newSVpv(comm, 0))); 418 XPUSHs(sv_2mortal(perl_process_callchain(sample, evsel, al))); 419 call_pv("main::trace_unhandled", G_SCALAR); 420 } 421 SPAGAIN; 422 PUTBACK; 423 FREETMPS; 424 LEAVE; 425 } 426 427 static void perl_process_event_generic(union perf_event *event, 428 struct perf_sample *sample, 429 struct perf_evsel *evsel) 430 { 431 dSP; 432 433 if (!get_cv("process_event", 0)) 434 return; 435 436 ENTER; 437 SAVETMPS; 438 PUSHMARK(SP); 439 XPUSHs(sv_2mortal(newSVpvn((const char *)event, event->header.size))); 440 XPUSHs(sv_2mortal(newSVpvn((const char *)&evsel->attr, sizeof(evsel->attr)))); 441 XPUSHs(sv_2mortal(newSVpvn((const char *)sample, sizeof(*sample)))); 442 XPUSHs(sv_2mortal(newSVpvn((const char *)sample->raw_data, sample->raw_size))); 443 PUTBACK; 444 call_pv("process_event", G_SCALAR); 445 SPAGAIN; 446 PUTBACK; 447 FREETMPS; 448 LEAVE; 449 } 450 451 static void perl_process_event(union perf_event *event, 452 struct perf_sample *sample, 453 struct perf_evsel *evsel, 454 struct addr_location *al) 455 { 456 perl_process_tracepoint(sample, evsel, al); 457 perl_process_event_generic(event, sample, evsel); 458 } 459 460 static void run_start_sub(void) 461 { 462 dSP; /* access to Perl stack */ 463 PUSHMARK(SP); 464 465 if (get_cv("main::trace_begin", 0)) 466 call_pv("main::trace_begin", G_DISCARD | G_NOARGS); 467 } 468 469 /* 470 * Start trace script 471 */ 472 static int perl_start_script(const char *script, int argc, const char **argv) 473 { 474 const char **command_line; 475 int i, err = 0; 476 477 command_line = malloc((argc + 2) * sizeof(const char *)); 478 command_line[0] = ""; 479 command_line[1] = script; 480 for (i = 2; i < argc + 2; i++) 481 command_line[i] = argv[i - 2]; 482 483 my_perl = perl_alloc(); 484 perl_construct(my_perl); 485 486 if (perl_parse(my_perl, xs_init, argc + 2, (char **)command_line, 487 (char **)NULL)) { 488 err = -1; 489 goto error; 490 } 491 492 if (perl_run(my_perl)) { 493 err = -1; 494 goto error; 495 } 496 497 if (SvTRUE(ERRSV)) { 498 err = -1; 499 goto error; 500 } 501 502 run_start_sub(); 503 504 free(command_line); 505 return 0; 506 error: 507 perl_free(my_perl); 508 free(command_line); 509 510 return err; 511 } 512 513 static int perl_flush_script(void) 514 { 515 return 0; 516 } 517 518 /* 519 * Stop trace script 520 */ 521 static int perl_stop_script(void) 522 { 523 dSP; /* access to Perl stack */ 524 PUSHMARK(SP); 525 526 if (get_cv("main::trace_end", 0)) 527 call_pv("main::trace_end", G_DISCARD | G_NOARGS); 528 529 perl_destruct(my_perl); 530 perl_free(my_perl); 531 532 return 0; 533 } 534 535 static int perl_generate_script(struct pevent *pevent, const char *outfile) 536 { 537 struct event_format *event = NULL; 538 struct format_field *f; 539 char fname[PATH_MAX]; 540 int not_first, count; 541 FILE *ofp; 542 543 sprintf(fname, "%s.pl", outfile); 544 ofp = fopen(fname, "w"); 545 if (ofp == NULL) { 546 fprintf(stderr, "couldn't open %s\n", fname); 547 return -1; 548 } 549 550 fprintf(ofp, "# perf script event handlers, " 551 "generated by perf script -g perl\n"); 552 553 fprintf(ofp, "# Licensed under the terms of the GNU GPL" 554 " License version 2\n\n"); 555 556 fprintf(ofp, "# The common_* event handler fields are the most useful " 557 "fields common to\n"); 558 559 fprintf(ofp, "# all events. They don't necessarily correspond to " 560 "the 'common_*' fields\n"); 561 562 fprintf(ofp, "# in the format files. Those fields not available as " 563 "handler params can\n"); 564 565 fprintf(ofp, "# be retrieved using Perl functions of the form " 566 "common_*($context).\n"); 567 568 fprintf(ofp, "# See Context.pm for the list of available " 569 "functions.\n\n"); 570 571 fprintf(ofp, "use lib \"$ENV{'PERF_EXEC_PATH'}/scripts/perl/" 572 "Perf-Trace-Util/lib\";\n"); 573 574 fprintf(ofp, "use lib \"./Perf-Trace-Util/lib\";\n"); 575 fprintf(ofp, "use Perf::Trace::Core;\n"); 576 fprintf(ofp, "use Perf::Trace::Context;\n"); 577 fprintf(ofp, "use Perf::Trace::Util;\n\n"); 578 579 fprintf(ofp, "sub trace_begin\n{\n\t# optional\n}\n\n"); 580 fprintf(ofp, "sub trace_end\n{\n\t# optional\n}\n"); 581 582 583 fprintf(ofp, "\n\ 584 sub print_backtrace\n\ 585 {\n\ 586 my $callchain = shift;\n\ 587 for my $node (@$callchain)\n\ 588 {\n\ 589 if(exists $node->{sym})\n\ 590 {\n\ 591 printf( \"\\t[\\%%x] \\%%s\\n\", $node->{ip}, $node->{sym}{name});\n\ 592 }\n\ 593 else\n\ 594 {\n\ 595 printf( \"\\t[\\%%x]\\n\", $node{ip});\n\ 596 }\n\ 597 }\n\ 598 }\n\n\ 599 "); 600 601 602 while ((event = trace_find_next_event(pevent, event))) { 603 fprintf(ofp, "sub %s::%s\n{\n", event->system, event->name); 604 fprintf(ofp, "\tmy ("); 605 606 fprintf(ofp, "$event_name, "); 607 fprintf(ofp, "$context, "); 608 fprintf(ofp, "$common_cpu, "); 609 fprintf(ofp, "$common_secs, "); 610 fprintf(ofp, "$common_nsecs,\n"); 611 fprintf(ofp, "\t $common_pid, "); 612 fprintf(ofp, "$common_comm, "); 613 fprintf(ofp, "$common_callchain,\n\t "); 614 615 not_first = 0; 616 count = 0; 617 618 for (f = event->format.fields; f; f = f->next) { 619 if (not_first++) 620 fprintf(ofp, ", "); 621 if (++count % 5 == 0) 622 fprintf(ofp, "\n\t "); 623 624 fprintf(ofp, "$%s", f->name); 625 } 626 fprintf(ofp, ") = @_;\n\n"); 627 628 fprintf(ofp, "\tprint_header($event_name, $common_cpu, " 629 "$common_secs, $common_nsecs,\n\t " 630 "$common_pid, $common_comm, $common_callchain);\n\n"); 631 632 fprintf(ofp, "\tprintf(\""); 633 634 not_first = 0; 635 count = 0; 636 637 for (f = event->format.fields; f; f = f->next) { 638 if (not_first++) 639 fprintf(ofp, ", "); 640 if (count && count % 4 == 0) { 641 fprintf(ofp, "\".\n\t \""); 642 } 643 count++; 644 645 fprintf(ofp, "%s=", f->name); 646 if (f->flags & FIELD_IS_STRING || 647 f->flags & FIELD_IS_FLAG || 648 f->flags & FIELD_IS_SYMBOLIC) 649 fprintf(ofp, "%%s"); 650 else if (f->flags & FIELD_IS_SIGNED) 651 fprintf(ofp, "%%d"); 652 else 653 fprintf(ofp, "%%u"); 654 } 655 656 fprintf(ofp, "\\n\",\n\t "); 657 658 not_first = 0; 659 count = 0; 660 661 for (f = event->format.fields; f; f = f->next) { 662 if (not_first++) 663 fprintf(ofp, ", "); 664 665 if (++count % 5 == 0) 666 fprintf(ofp, "\n\t "); 667 668 if (f->flags & FIELD_IS_FLAG) { 669 if ((count - 1) % 5 != 0) { 670 fprintf(ofp, "\n\t "); 671 count = 4; 672 } 673 fprintf(ofp, "flag_str(\""); 674 fprintf(ofp, "%s::%s\", ", event->system, 675 event->name); 676 fprintf(ofp, "\"%s\", $%s)", f->name, 677 f->name); 678 } else if (f->flags & FIELD_IS_SYMBOLIC) { 679 if ((count - 1) % 5 != 0) { 680 fprintf(ofp, "\n\t "); 681 count = 4; 682 } 683 fprintf(ofp, "symbol_str(\""); 684 fprintf(ofp, "%s::%s\", ", event->system, 685 event->name); 686 fprintf(ofp, "\"%s\", $%s)", f->name, 687 f->name); 688 } else 689 fprintf(ofp, "$%s", f->name); 690 } 691 692 fprintf(ofp, ");\n\n"); 693 694 fprintf(ofp, "\tprint_backtrace($common_callchain);\n"); 695 696 fprintf(ofp, "}\n\n"); 697 } 698 699 fprintf(ofp, "sub trace_unhandled\n{\n\tmy ($event_name, $context, " 700 "$common_cpu, $common_secs, $common_nsecs,\n\t " 701 "$common_pid, $common_comm, $common_callchain) = @_;\n\n"); 702 703 fprintf(ofp, "\tprint_header($event_name, $common_cpu, " 704 "$common_secs, $common_nsecs,\n\t $common_pid, " 705 "$common_comm, $common_callchain);\n"); 706 fprintf(ofp, "\tprint_backtrace($common_callchain);\n"); 707 fprintf(ofp, "}\n\n"); 708 709 fprintf(ofp, "sub print_header\n{\n" 710 "\tmy ($event_name, $cpu, $secs, $nsecs, $pid, $comm) = @_;\n\n" 711 "\tprintf(\"%%-20s %%5u %%05u.%%09u %%8u %%-20s \",\n\t " 712 "$event_name, $cpu, $secs, $nsecs, $pid, $comm);\n}\n"); 713 714 fprintf(ofp, 715 "\n# Packed byte string args of process_event():\n" 716 "#\n" 717 "# $event:\tunion perf_event\tutil/event.h\n" 718 "# $attr:\tstruct perf_event_attr\tlinux/perf_event.h\n" 719 "# $sample:\tstruct perf_sample\tutil/event.h\n" 720 "# $raw_data:\tperf_sample->raw_data\tutil/event.h\n" 721 "\n" 722 "sub process_event\n" 723 "{\n" 724 "\tmy ($event, $attr, $sample, $raw_data) = @_;\n" 725 "\n" 726 "\tmy @event\t= unpack(\"LSS\", $event);\n" 727 "\tmy @attr\t= unpack(\"LLQQQQQLLQQ\", $attr);\n" 728 "\tmy @sample\t= unpack(\"QLLQQQQQLL\", $sample);\n" 729 "\tmy @raw_data\t= unpack(\"C*\", $raw_data);\n" 730 "\n" 731 "\tuse Data::Dumper;\n" 732 "\tprint Dumper \\@event, \\@attr, \\@sample, \\@raw_data;\n" 733 "}\n"); 734 735 fclose(ofp); 736 737 fprintf(stderr, "generated Perl script: %s\n", fname); 738 739 return 0; 740 } 741 742 struct scripting_ops perl_scripting_ops = { 743 .name = "Perl", 744 .start_script = perl_start_script, 745 .flush_script = perl_flush_script, 746 .stop_script = perl_stop_script, 747 .process_event = perl_process_event, 748 .generate_script = perl_generate_script, 749 }; 750