tools/perf/util/scripting-engines/trace-event-perl.c

   1 /*
   2  * trace-event-perl.  Feed perf script events to an embedded Perl interpreter.
   3  *
   4  * Copyright (C) 2009 Tom Zanussi <[email protected]>
   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 evsel *evsel,
 261                                   struct addr_location *al)
 262 {
 263         struct callchain_cursor *cursor;
 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         cursor = get_tls_callchain_cursor();
 274
 275         if (thread__resolve_callchain(al->thread, cursor, evsel,
 276                                       sample, NULL, NULL, scripting_max_stack) != 0) {
 277                 pr_err("Failed to resolve callchain. Skipping\n");
 278                 goto exit;
 279         }
 280         callchain_cursor_commit(cursor);
 281
 282
 283         while (1) {
 284                 HV *elem;
 285                 struct callchain_cursor_node *node;
 286                 node = callchain_cursor_current(cursor);
 287                 if (!node)
 288                         break;
 289
 290                 elem = newHV();
 291                 if (!elem)
 292                         goto exit;
 293
 294                 if (!hv_stores(elem, "ip", newSVuv(node->ip))) {
 295                         hv_undef(elem);
 296                         goto exit;
 297                 }
 298
 299                 if (node->ms.sym) {
 300                         HV *sym = newHV();
 301                         if (!sym) {
 302                                 hv_undef(elem);
 303                                 goto exit;
 304                         }
 305                         if (!hv_stores(sym, "start",   newSVuv(node->ms.sym->start)) ||
 306                             !hv_stores(sym, "end",     newSVuv(node->ms.sym->end)) ||
 307                             !hv_stores(sym, "binding", newSVuv(node->ms.sym->binding)) ||
 308                             !hv_stores(sym, "name",    newSVpvn(node->ms.sym->name,
 309                                                                 node->ms.sym->namelen)) ||
 310                             !hv_stores(elem, "sym",    newRV_noinc((SV*)sym))) {
 311                                 hv_undef(sym);
 312                                 hv_undef(elem);
 313                                 goto exit;
 314                         }
 315                 }
 316
 317                 if (node->ms.map) {
 318                         struct map *map = node->ms.map;
 319                         struct dso *dso = map ? map__dso(map) : NULL;
 320                         const char *dsoname = "[unknown]";
 321
 322                         if (dso) {
 323                                 if (symbol_conf.show_kernel_path && dso__long_name(dso))
 324                                         dsoname = dso__long_name(dso);
 325                                 else
 326                                         dsoname = dso__name(dso);
 327                         }
 328                         if (!hv_stores(elem, "dso", newSVpv(dsoname,0))) {
 329                                 hv_undef(elem);
 330                                 goto exit;
 331                         }
 332                 }
 333
 334                 callchain_cursor_advance(cursor);
 335                 av_push(list, newRV_noinc((SV*)elem));
 336         }
 337
 338 exit:
 339         return newRV_noinc((SV*)list);
 340 }
 341
 342 static void perl_process_tracepoint(struct perf_sample *sample,
 343                                     struct evsel *evsel,
 344                                     struct addr_location *al)
 345 {
 346         struct thread *thread = al->thread;
 347         struct tep_event *event = evsel->tp_format;
 348         struct tep_format_field *field;
 349         static char handler[256];
 350         unsigned long long val;
 351         unsigned long s, ns;
 352         int pid;
 353         int cpu = sample->cpu;
 354         void *data = sample->raw_data;
 355         unsigned long long nsecs = sample->time;
 356         const char *comm = thread__comm_str(thread);
 357         DECLARE_BITMAP(events_defined, TRACE_EVENT_TYPE_MAX);
 358
 359         bitmap_zero(events_defined, TRACE_EVENT_TYPE_MAX);
 360         dSP;
 361
 362         if (evsel->core.attr.type != PERF_TYPE_TRACEPOINT)
 363                 return;
 364
 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, evsel, 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, evsel, 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,
 438                                        struct perf_sample *sample,
 439                                        struct evsel *evsel)
 440 {
 441         dSP;
 442
 443         if (!get_cv("process_event", 0))
 444                 return;
 445
 446         ENTER;
 447         SAVETMPS;
 448         PUSHMARK(SP);
 449         XPUSHs(sv_2mortal(newSVpvn((const char *)event, event->header.size)));
 450         XPUSHs(sv_2mortal(newSVpvn((const char *)&evsel->core.attr, sizeof(evsel->core.attr))));
 451         XPUSHs(sv_2mortal(newSVpvn((const char *)sample, sizeof(*sample))));
 452         XPUSHs(sv_2mortal(newSVpvn((const char *)sample->raw_data, sample->raw_size)));
 453         PUTBACK;
 454         call_pv("process_event", G_SCALAR);
 455         SPAGAIN;
 456         PUTBACK;
 457         FREETMPS;
 458         LEAVE;
 459 }
 460
 461 static void perl_process_event(union perf_event *event,
 462                                struct perf_sample *sample,
 463                                struct evsel *evsel,
 464                                struct addr_location *al,
 465                                struct addr_location *addr_al)
 466 {
 467         scripting_context__update(scripting_context, event, sample, evsel, al, addr_al);
 468         perl_process_tracepoint(sample, evsel, al);
 469         perl_process_event_generic(event, sample, evsel);
 470 }
 471
 472 static void run_start_sub(void)
 473 {
 474         dSP; /* access to Perl stack */
 475         PUSHMARK(SP);
 476
 477         if (get_cv("main::trace_begin", 0))
 478                 call_pv("main::trace_begin", G_DISCARD | G_NOARGS);
 479 }
 480
 481 /*
 482  * Start trace script
 483  */
 484 static int perl_start_script(const char *script, int argc, const char **argv,
 485                              struct perf_session *session)
 486 {
 487         const char **command_line;
 488         int i, err = 0;
 489
 490         scripting_context->session = session;
 491
 492         command_line = malloc((argc + 2) * sizeof(const char *));
 493         if (!command_line)
 494                 return -ENOMEM;
 495
 496         command_line[0] = "";
 497         command_line[1] = script;
 498         for (i = 2; i < argc + 2; i++)
 499                 command_line[i] = argv[i - 2];
 500
 501         my_perl = perl_alloc();
 502         perl_construct(my_perl);
 503
 504         if (perl_parse(my_perl, xs_init, argc + 2, (char **)command_line,
 505                        (char **)NULL)) {
 506                 err = -1;
 507                 goto error;
 508         }
 509
 510         if (perl_run(my_perl)) {
 511                 err = -1;
 512                 goto error;
 513         }
 514
 515         if (SvTRUE(ERRSV)) {
 516                 err = -1;
 517                 goto error;
 518         }
 519
 520         run_start_sub();
 521
 522         free(command_line);
 523         return 0;
 524 error:
 525         perl_free(my_perl);
 526         free(command_line);
 527
 528         return err;
 529 }
 530
 531 static int perl_flush_script(void)
 532 {
 533         return 0;
 534 }
 535
 536 /*
 537  * Stop trace script
 538  */
 539 static int perl_stop_script(void)
 540 {
 541         dSP; /* access to Perl stack */
 542         PUSHMARK(SP);
 543
 544         if (get_cv("main::trace_end", 0))
 545                 call_pv("main::trace_end", G_DISCARD | G_NOARGS);
 546
 547         perl_destruct(my_perl);
 548         perl_free(my_perl);
 549
 550         return 0;
 551 }
 552
 553 static int perl_generate_script(struct tep_handle *pevent, const char *outfile)
 554 {
 555         int i, not_first, count, nr_events;
 556         struct tep_event **all_events;
 557         struct tep_event *event = NULL;
 558         struct tep_format_field *f;
 559         char fname[PATH_MAX];
 560         FILE *ofp;
 561
 562         sprintf(fname, "%s.pl", outfile);
 563         ofp = fopen(fname, "w");
 564         if (ofp == NULL) {
 565                 fprintf(stderr, "couldn't open %s\n", fname);
 566                 return -1;
 567         }
 568
 569         fprintf(ofp, "# perf script event handlers, "
 570                 "generated by perf script -g perl\n");
 571
 572         fprintf(ofp, "# Licensed under the terms of the GNU GPL"
 573                 " License version 2\n\n");
 574
 575         fprintf(ofp, "# The common_* event handler fields are the most useful "
 576                 "fields common to\n");
 577
 578         fprintf(ofp, "# all events.  They don't necessarily correspond to "
 579                 "the 'common_*' fields\n");
 580
 581         fprintf(ofp, "# in the format files.  Those fields not available as "
 582                 "handler params can\n");
 583
 584         fprintf(ofp, "# be retrieved using Perl functions of the form "
 585                 "common_*($context).\n");
 586
 587         fprintf(ofp, "# See Context.pm for the list of available "
 588                 "functions.\n\n");
 589
 590         fprintf(ofp, "use lib \"$ENV{'PERF_EXEC_PATH'}/scripts/perl/"
 591                 "Perf-Trace-Util/lib\";\n");
 592
 593         fprintf(ofp, "use lib \"./Perf-Trace-Util/lib\";\n");
 594         fprintf(ofp, "use Perf::Trace::Core;\n");
 595         fprintf(ofp, "use Perf::Trace::Context;\n");
 596         fprintf(ofp, "use Perf::Trace::Util;\n\n");
 597
 598         fprintf(ofp, "sub trace_begin\n{\n\t# optional\n}\n\n");
 599         fprintf(ofp, "sub trace_end\n{\n\t# optional\n}\n");
 600
 601
 602         fprintf(ofp, "\n\
 603 sub print_backtrace\n\
 604 {\n\
 605         my $callchain = shift;\n\
 606         for my $node (@$callchain)\n\
 607         {\n\
 608                 if(exists $node->{sym})\n\
 609                 {\n\
 610                         printf( \"\\t[\\%%x] \\%%s\\n\", $node->{ip}, $node->{sym}{name});\n\
 611                 }\n\
 612                 else\n\
 613                 {\n\
 614                         printf( \"\\t[\\%%x]\\n\", $node{ip});\n\
 615                 }\n\
 616         }\n\
 617 }\n\n\
 618 ");
 619
 620         nr_events = tep_get_events_count(pevent);
 621         all_events = tep_list_events(pevent, TEP_EVENT_SORT_ID);
 622
 623         for (i = 0; all_events && i < nr_events; i++) {
 624                 event = all_events[i];
 625                 fprintf(ofp, "sub %s::%s\n{\n", event->system, event->name);
 626                 fprintf(ofp, "\tmy (");
 627
 628                 fprintf(ofp, "$event_name, ");
 629                 fprintf(ofp, "$context, ");
 630                 fprintf(ofp, "$common_cpu, ");
 631                 fprintf(ofp, "$common_secs, ");
 632                 fprintf(ofp, "$common_nsecs,\n");
 633                 fprintf(ofp, "\t    $common_pid, ");
 634                 fprintf(ofp, "$common_comm, ");
 635                 fprintf(ofp, "$common_callchain,\n\t    ");
 636
 637                 not_first = 0;
 638                 count = 0;
 639
 640                 for (f = event->format.fields; f; f = f->next) {
 641                         if (not_first++)
 642                                 fprintf(ofp, ", ");
 643                         if (++count % 5 == 0)
 644                                 fprintf(ofp, "\n\t    ");
 645
 646                         fprintf(ofp, "$%s", f->name);
 647                 }
 648                 fprintf(ofp, ") = @_;\n\n");
 649
 650                 fprintf(ofp, "\tprint_header($event_name, $common_cpu, "
 651                         "$common_secs, $common_nsecs,\n\t             "
 652                         "$common_pid, $common_comm, $common_callchain);\n\n");
 653
 654                 fprintf(ofp, "\tprintf(\"");
 655
 656                 not_first = 0;
 657                 count = 0;
 658
 659                 for (f = event->format.fields; f; f = f->next) {
 660                         if (not_first++)
 661                                 fprintf(ofp, ", ");
 662                         if (count && count % 4 == 0) {
 663                                 fprintf(ofp, "\".\n\t       \"");
 664                         }
 665                         count++;
 666
 667                         fprintf(ofp, "%s=", f->name);
 668                         if (f->flags & TEP_FIELD_IS_STRING ||
 669                             f->flags & TEP_FIELD_IS_FLAG ||
 670                             f->flags & TEP_FIELD_IS_SYMBOLIC)
 671                                 fprintf(ofp, "%%s");
 672                         else if (f->flags & TEP_FIELD_IS_SIGNED)
 673                                 fprintf(ofp, "%%d");
 674                         else
 675                                 fprintf(ofp, "%%u");
 676                 }
 677
 678                 fprintf(ofp, "\\n\",\n\t       ");
 679
 680                 not_first = 0;
 681                 count = 0;
 682
 683                 for (f = event->format.fields; f; f = f->next) {
 684                         if (not_first++)
 685                                 fprintf(ofp, ", ");
 686
 687                         if (++count % 5 == 0)
 688                                 fprintf(ofp, "\n\t       ");
 689
 690                         if (f->flags & TEP_FIELD_IS_FLAG) {
 691                                 if ((count - 1) % 5 != 0) {
 692                                         fprintf(ofp, "\n\t       ");
 693                                         count = 4;
 694                                 }
 695                                 fprintf(ofp, "flag_str(\"");
 696                                 fprintf(ofp, "%s::%s\", ", event->system,
 697                                         event->name);
 698                                 fprintf(ofp, "\"%s\", $%s)", f->name,
 699                                         f->name);
 700                         } else if (f->flags & TEP_FIELD_IS_SYMBOLIC) {
 701                                 if ((count - 1) % 5 != 0) {
 702                                         fprintf(ofp, "\n\t       ");
 703                                         count = 4;
 704                                 }
 705                                 fprintf(ofp, "symbol_str(\"");
 706                                 fprintf(ofp, "%s::%s\", ", event->system,
 707                                         event->name);
 708                                 fprintf(ofp, "\"%s\", $%s)", f->name,
 709                                         f->name);
 710                         } else
 711                                 fprintf(ofp, "$%s", f->name);
 712                 }
 713
 714                 fprintf(ofp, ");\n\n");
 715
 716                 fprintf(ofp, "\tprint_backtrace($common_callchain);\n");
 717
 718                 fprintf(ofp, "}\n\n");
 719         }
 720
 721         fprintf(ofp, "sub trace_unhandled\n{\n\tmy ($event_name, $context, "
 722                 "$common_cpu, $common_secs, $common_nsecs,\n\t    "
 723                 "$common_pid, $common_comm, $common_callchain) = @_;\n\n");
 724
 725         fprintf(ofp, "\tprint_header($event_name, $common_cpu, "
 726                 "$common_secs, $common_nsecs,\n\t             $common_pid, "
 727                 "$common_comm, $common_callchain);\n");
 728         fprintf(ofp, "\tprint_backtrace($common_callchain);\n");
 729         fprintf(ofp, "}\n\n");
 730
 731         fprintf(ofp, "sub print_header\n{\n"
 732                 "\tmy ($event_name, $cpu, $secs, $nsecs, $pid, $comm) = @_;\n\n"
 733                 "\tprintf(\"%%-20s %%5u %%05u.%%09u %%8u %%-20s \",\n\t       "
 734                 "$event_name, $cpu, $secs, $nsecs, $pid, $comm);\n}\n");
 735
 736         fprintf(ofp,
 737                 "\n# Packed byte string args of process_event():\n"
 738                 "#\n"
 739                 "# $event:\tunion perf_event\tutil/event.h\n"
 740                 "# $attr:\tstruct perf_event_attr\tlinux/perf_event.h\n"
 741                 "# $sample:\tstruct perf_sample\tutil/event.h\n"
 742                 "# $raw_data:\tperf_sample->raw_data\tutil/event.h\n"
 743                 "\n"
 744                 "sub process_event\n"
 745                 "{\n"
 746                 "\tmy ($event, $attr, $sample, $raw_data) = @_;\n"
 747                 "\n"
 748                 "\tmy @event\t= unpack(\"LSS\", $event);\n"
 749                 "\tmy @attr\t= unpack(\"LLQQQQQLLQQ\", $attr);\n"
 750                 "\tmy @sample\t= unpack(\"QLLQQQQQLL\", $sample);\n"
 751                 "\tmy @raw_data\t= unpack(\"C*\", $raw_data);\n"
 752                 "\n"
 753                 "\tuse Data::Dumper;\n"
 754                 "\tprint Dumper \\@event, \\@attr, \\@sample, \\@raw_data;\n"
 755                 "}\n");
 756
 757         fclose(ofp);
 758
 759         fprintf(stderr, "generated Perl script: %s\n", fname);
 760
 761         return 0;
 762 }
 763
 764 struct scripting_ops perl_scripting_ops = {
 765         .name = "Perl",
 766         .dirname = "perl",
 767         .start_script = perl_start_script,
 768         .flush_script = perl_flush_script,
 769         .stop_script = perl_stop_script,
 770         .process_event = perl_process_event,
 771         .generate_script = perl_generate_script,
 772 };