1 /* 2 * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> 3 * 4 * Parts came from builtin-annotate.c, see those files for further 5 * copyright notes. 6 * 7 * Released under the GPL v2. (and only v2, not any later version) 8 */ 9 10 #include "util.h" 11 #include "build-id.h" 12 #include "color.h" 13 #include "cache.h" 14 #include "symbol.h" 15 #include "debug.h" 16 #include "annotate.h" 17 #include <pthread.h> 18 19 const char *disassembler_style; 20 const char *objdump_path; 21 22 static struct ins *ins__find(const char *name); 23 static int disasm_line__parse(char *line, char **namep, char **rawp); 24 25 static void ins__delete(struct ins_operands *ops) 26 { 27 free(ops->source.raw); 28 free(ops->source.name); 29 free(ops->target.raw); 30 free(ops->target.name); 31 } 32 33 static int ins__raw_scnprintf(struct ins *ins, char *bf, size_t size, 34 struct ins_operands *ops) 35 { 36 return scnprintf(bf, size, "%-6.6s %s", ins->name, ops->raw); 37 } 38 39 int ins__scnprintf(struct ins *ins, char *bf, size_t size, 40 struct ins_operands *ops) 41 { 42 if (ins->ops->scnprintf) 43 return ins->ops->scnprintf(ins, bf, size, ops); 44 45 return ins__raw_scnprintf(ins, bf, size, ops); 46 } 47 48 static int call__parse(struct ins_operands *ops) 49 { 50 char *endptr, *tok, *name; 51 52 ops->target.addr = strtoull(ops->raw, &endptr, 16); 53 54 name = strchr(endptr, '<'); 55 if (name == NULL) 56 goto indirect_call; 57 58 name++; 59 60 tok = strchr(name, '>'); 61 if (tok == NULL) 62 return -1; 63 64 *tok = '\0'; 65 ops->target.name = strdup(name); 66 *tok = '>'; 67 68 return ops->target.name == NULL ? -1 : 0; 69 70 indirect_call: 71 tok = strchr(endptr, '('); 72 if (tok != NULL) { 73 ops->target.addr = 0; 74 return 0; 75 } 76 77 tok = strchr(endptr, '*'); 78 if (tok == NULL) 79 return -1; 80 81 ops->target.addr = strtoull(tok + 1, NULL, 16); 82 return 0; 83 } 84 85 static int call__scnprintf(struct ins *ins, char *bf, size_t size, 86 struct ins_operands *ops) 87 { 88 if (ops->target.name) 89 return scnprintf(bf, size, "%-6.6s %s", ins->name, ops->target.name); 90 91 if (ops->target.addr == 0) 92 return ins__raw_scnprintf(ins, bf, size, ops); 93 94 return scnprintf(bf, size, "%-6.6s *%" PRIx64, ins->name, ops->target.addr); 95 } 96 97 static struct ins_ops call_ops = { 98 .parse = call__parse, 99 .scnprintf = call__scnprintf, 100 }; 101 102 bool ins__is_call(const struct ins *ins) 103 { 104 return ins->ops == &call_ops; 105 } 106 107 static int jump__parse(struct ins_operands *ops) 108 { 109 const char *s = strchr(ops->raw, '+'); 110 111 ops->target.addr = strtoll(ops->raw, NULL, 16); 112 113 if (s++ != NULL) 114 ops->target.offset = strtoll(s, NULL, 16); 115 else 116 ops->target.offset = UINT64_MAX; 117 118 return 0; 119 } 120 121 static int jump__scnprintf(struct ins *ins, char *bf, size_t size, 122 struct ins_operands *ops) 123 { 124 return scnprintf(bf, size, "%-6.6s %" PRIx64, ins->name, ops->target.offset); 125 } 126 127 static struct ins_ops jump_ops = { 128 .parse = jump__parse, 129 .scnprintf = jump__scnprintf, 130 }; 131 132 bool ins__is_jump(const struct ins *ins) 133 { 134 return ins->ops == &jump_ops; 135 } 136 137 static int comment__symbol(char *raw, char *comment, u64 *addrp, char **namep) 138 { 139 char *endptr, *name, *t; 140 141 if (strstr(raw, "(%rip)") == NULL) 142 return 0; 143 144 *addrp = strtoull(comment, &endptr, 16); 145 name = strchr(endptr, '<'); 146 if (name == NULL) 147 return -1; 148 149 name++; 150 151 t = strchr(name, '>'); 152 if (t == NULL) 153 return 0; 154 155 *t = '\0'; 156 *namep = strdup(name); 157 *t = '>'; 158 159 return 0; 160 } 161 162 static int lock__parse(struct ins_operands *ops) 163 { 164 char *name; 165 166 ops->locked.ops = zalloc(sizeof(*ops->locked.ops)); 167 if (ops->locked.ops == NULL) 168 return 0; 169 170 if (disasm_line__parse(ops->raw, &name, &ops->locked.ops->raw) < 0) 171 goto out_free_ops; 172 173 ops->locked.ins = ins__find(name); 174 if (ops->locked.ins == NULL) 175 goto out_free_ops; 176 177 if (!ops->locked.ins->ops) 178 return 0; 179 180 if (ops->locked.ins->ops->parse) 181 ops->locked.ins->ops->parse(ops->locked.ops); 182 183 return 0; 184 185 out_free_ops: 186 free(ops->locked.ops); 187 ops->locked.ops = NULL; 188 return 0; 189 } 190 191 static int lock__scnprintf(struct ins *ins, char *bf, size_t size, 192 struct ins_operands *ops) 193 { 194 int printed; 195 196 if (ops->locked.ins == NULL) 197 return ins__raw_scnprintf(ins, bf, size, ops); 198 199 printed = scnprintf(bf, size, "%-6.6s ", ins->name); 200 return printed + ins__scnprintf(ops->locked.ins, bf + printed, 201 size - printed, ops->locked.ops); 202 } 203 204 static void lock__delete(struct ins_operands *ops) 205 { 206 free(ops->locked.ops); 207 free(ops->target.raw); 208 free(ops->target.name); 209 } 210 211 static struct ins_ops lock_ops = { 212 .free = lock__delete, 213 .parse = lock__parse, 214 .scnprintf = lock__scnprintf, 215 }; 216 217 static int mov__parse(struct ins_operands *ops) 218 { 219 char *s = strchr(ops->raw, ','), *target, *comment, prev; 220 221 if (s == NULL) 222 return -1; 223 224 *s = '\0'; 225 ops->source.raw = strdup(ops->raw); 226 *s = ','; 227 228 if (ops->source.raw == NULL) 229 return -1; 230 231 target = ++s; 232 233 while (s[0] != '\0' && !isspace(s[0])) 234 ++s; 235 prev = *s; 236 *s = '\0'; 237 238 ops->target.raw = strdup(target); 239 *s = prev; 240 241 if (ops->target.raw == NULL) 242 goto out_free_source; 243 244 comment = strchr(s, '#'); 245 if (comment == NULL) 246 return 0; 247 248 while (comment[0] != '\0' && isspace(comment[0])) 249 ++comment; 250 251 comment__symbol(ops->source.raw, comment, &ops->source.addr, &ops->source.name); 252 comment__symbol(ops->target.raw, comment, &ops->target.addr, &ops->target.name); 253 254 return 0; 255 256 out_free_source: 257 free(ops->source.raw); 258 ops->source.raw = NULL; 259 return -1; 260 } 261 262 static int mov__scnprintf(struct ins *ins, char *bf, size_t size, 263 struct ins_operands *ops) 264 { 265 return scnprintf(bf, size, "%-6.6s %s,%s", ins->name, 266 ops->source.name ?: ops->source.raw, 267 ops->target.name ?: ops->target.raw); 268 } 269 270 static struct ins_ops mov_ops = { 271 .parse = mov__parse, 272 .scnprintf = mov__scnprintf, 273 }; 274 275 static int dec__parse(struct ins_operands *ops) 276 { 277 char *target, *comment, *s, prev; 278 279 target = s = ops->raw; 280 281 while (s[0] != '\0' && !isspace(s[0])) 282 ++s; 283 prev = *s; 284 *s = '\0'; 285 286 ops->target.raw = strdup(target); 287 *s = prev; 288 289 if (ops->target.raw == NULL) 290 return -1; 291 292 comment = strchr(s, '#'); 293 if (comment == NULL) 294 return 0; 295 296 while (comment[0] != '\0' && isspace(comment[0])) 297 ++comment; 298 299 comment__symbol(ops->target.raw, comment, &ops->target.addr, &ops->target.name); 300 301 return 0; 302 } 303 304 static int dec__scnprintf(struct ins *ins, char *bf, size_t size, 305 struct ins_operands *ops) 306 { 307 return scnprintf(bf, size, "%-6.6s %s", ins->name, 308 ops->target.name ?: ops->target.raw); 309 } 310 311 static struct ins_ops dec_ops = { 312 .parse = dec__parse, 313 .scnprintf = dec__scnprintf, 314 }; 315 316 static int nop__scnprintf(struct ins *ins __maybe_unused, char *bf, size_t size, 317 struct ins_operands *ops __maybe_unused) 318 { 319 return scnprintf(bf, size, "%-6.6s", "nop"); 320 } 321 322 static struct ins_ops nop_ops = { 323 .scnprintf = nop__scnprintf, 324 }; 325 326 /* 327 * Must be sorted by name! 328 */ 329 static struct ins instructions[] = { 330 { .name = "add", .ops = &mov_ops, }, 331 { .name = "addl", .ops = &mov_ops, }, 332 { .name = "addq", .ops = &mov_ops, }, 333 { .name = "addw", .ops = &mov_ops, }, 334 { .name = "and", .ops = &mov_ops, }, 335 { .name = "bts", .ops = &mov_ops, }, 336 { .name = "call", .ops = &call_ops, }, 337 { .name = "callq", .ops = &call_ops, }, 338 { .name = "cmp", .ops = &mov_ops, }, 339 { .name = "cmpb", .ops = &mov_ops, }, 340 { .name = "cmpl", .ops = &mov_ops, }, 341 { .name = "cmpq", .ops = &mov_ops, }, 342 { .name = "cmpw", .ops = &mov_ops, }, 343 { .name = "cmpxch", .ops = &mov_ops, }, 344 { .name = "dec", .ops = &dec_ops, }, 345 { .name = "decl", .ops = &dec_ops, }, 346 { .name = "imul", .ops = &mov_ops, }, 347 { .name = "inc", .ops = &dec_ops, }, 348 { .name = "incl", .ops = &dec_ops, }, 349 { .name = "ja", .ops = &jump_ops, }, 350 { .name = "jae", .ops = &jump_ops, }, 351 { .name = "jb", .ops = &jump_ops, }, 352 { .name = "jbe", .ops = &jump_ops, }, 353 { .name = "jc", .ops = &jump_ops, }, 354 { .name = "jcxz", .ops = &jump_ops, }, 355 { .name = "je", .ops = &jump_ops, }, 356 { .name = "jecxz", .ops = &jump_ops, }, 357 { .name = "jg", .ops = &jump_ops, }, 358 { .name = "jge", .ops = &jump_ops, }, 359 { .name = "jl", .ops = &jump_ops, }, 360 { .name = "jle", .ops = &jump_ops, }, 361 { .name = "jmp", .ops = &jump_ops, }, 362 { .name = "jmpq", .ops = &jump_ops, }, 363 { .name = "jna", .ops = &jump_ops, }, 364 { .name = "jnae", .ops = &jump_ops, }, 365 { .name = "jnb", .ops = &jump_ops, }, 366 { .name = "jnbe", .ops = &jump_ops, }, 367 { .name = "jnc", .ops = &jump_ops, }, 368 { .name = "jne", .ops = &jump_ops, }, 369 { .name = "jng", .ops = &jump_ops, }, 370 { .name = "jnge", .ops = &jump_ops, }, 371 { .name = "jnl", .ops = &jump_ops, }, 372 { .name = "jnle", .ops = &jump_ops, }, 373 { .name = "jno", .ops = &jump_ops, }, 374 { .name = "jnp", .ops = &jump_ops, }, 375 { .name = "jns", .ops = &jump_ops, }, 376 { .name = "jnz", .ops = &jump_ops, }, 377 { .name = "jo", .ops = &jump_ops, }, 378 { .name = "jp", .ops = &jump_ops, }, 379 { .name = "jpe", .ops = &jump_ops, }, 380 { .name = "jpo", .ops = &jump_ops, }, 381 { .name = "jrcxz", .ops = &jump_ops, }, 382 { .name = "js", .ops = &jump_ops, }, 383 { .name = "jz", .ops = &jump_ops, }, 384 { .name = "lea", .ops = &mov_ops, }, 385 { .name = "lock", .ops = &lock_ops, }, 386 { .name = "mov", .ops = &mov_ops, }, 387 { .name = "movb", .ops = &mov_ops, }, 388 { .name = "movdqa",.ops = &mov_ops, }, 389 { .name = "movl", .ops = &mov_ops, }, 390 { .name = "movq", .ops = &mov_ops, }, 391 { .name = "movslq", .ops = &mov_ops, }, 392 { .name = "movzbl", .ops = &mov_ops, }, 393 { .name = "movzwl", .ops = &mov_ops, }, 394 { .name = "nop", .ops = &nop_ops, }, 395 { .name = "nopl", .ops = &nop_ops, }, 396 { .name = "nopw", .ops = &nop_ops, }, 397 { .name = "or", .ops = &mov_ops, }, 398 { .name = "orl", .ops = &mov_ops, }, 399 { .name = "test", .ops = &mov_ops, }, 400 { .name = "testb", .ops = &mov_ops, }, 401 { .name = "testl", .ops = &mov_ops, }, 402 { .name = "xadd", .ops = &mov_ops, }, 403 }; 404 405 static int ins__cmp(const void *name, const void *insp) 406 { 407 const struct ins *ins = insp; 408 409 return strcmp(name, ins->name); 410 } 411 412 static struct ins *ins__find(const char *name) 413 { 414 const int nmemb = ARRAY_SIZE(instructions); 415 416 return bsearch(name, instructions, nmemb, sizeof(struct ins), ins__cmp); 417 } 418 419 int symbol__annotate_init(struct map *map __maybe_unused, struct symbol *sym) 420 { 421 struct annotation *notes = symbol__annotation(sym); 422 pthread_mutex_init(¬es->lock, NULL); 423 return 0; 424 } 425 426 int symbol__alloc_hist(struct symbol *sym) 427 { 428 struct annotation *notes = symbol__annotation(sym); 429 const size_t size = symbol__size(sym); 430 size_t sizeof_sym_hist; 431 432 /* Check for overflow when calculating sizeof_sym_hist */ 433 if (size > (SIZE_MAX - sizeof(struct sym_hist)) / sizeof(u64)) 434 return -1; 435 436 sizeof_sym_hist = (sizeof(struct sym_hist) + size * sizeof(u64)); 437 438 /* Check for overflow in zalloc argument */ 439 if (sizeof_sym_hist > (SIZE_MAX - sizeof(*notes->src)) 440 / symbol_conf.nr_events) 441 return -1; 442 443 notes->src = zalloc(sizeof(*notes->src) + symbol_conf.nr_events * sizeof_sym_hist); 444 if (notes->src == NULL) 445 return -1; 446 notes->src->sizeof_sym_hist = sizeof_sym_hist; 447 notes->src->nr_histograms = symbol_conf.nr_events; 448 INIT_LIST_HEAD(¬es->src->source); 449 return 0; 450 } 451 452 void symbol__annotate_zero_histograms(struct symbol *sym) 453 { 454 struct annotation *notes = symbol__annotation(sym); 455 456 pthread_mutex_lock(¬es->lock); 457 if (notes->src != NULL) 458 memset(notes->src->histograms, 0, 459 notes->src->nr_histograms * notes->src->sizeof_sym_hist); 460 pthread_mutex_unlock(¬es->lock); 461 } 462 463 int symbol__inc_addr_samples(struct symbol *sym, struct map *map, 464 int evidx, u64 addr) 465 { 466 unsigned offset; 467 struct annotation *notes; 468 struct sym_hist *h; 469 470 notes = symbol__annotation(sym); 471 if (notes->src == NULL) 472 return -ENOMEM; 473 474 pr_debug3("%s: addr=%#" PRIx64 "\n", __func__, map->unmap_ip(map, addr)); 475 476 if (addr < sym->start || addr > sym->end) 477 return -ERANGE; 478 479 offset = addr - sym->start; 480 h = annotation__histogram(notes, evidx); 481 h->sum++; 482 h->addr[offset]++; 483 484 pr_debug3("%#" PRIx64 " %s: period++ [addr: %#" PRIx64 ", %#" PRIx64 485 ", evidx=%d] => %" PRIu64 "\n", sym->start, sym->name, 486 addr, addr - sym->start, evidx, h->addr[offset]); 487 return 0; 488 } 489 490 static void disasm_line__init_ins(struct disasm_line *dl) 491 { 492 dl->ins = ins__find(dl->name); 493 494 if (dl->ins == NULL) 495 return; 496 497 if (!dl->ins->ops) 498 return; 499 500 if (dl->ins->ops->parse) 501 dl->ins->ops->parse(&dl->ops); 502 } 503 504 static int disasm_line__parse(char *line, char **namep, char **rawp) 505 { 506 char *name = line, tmp; 507 508 while (isspace(name[0])) 509 ++name; 510 511 if (name[0] == '\0') 512 return -1; 513 514 *rawp = name + 1; 515 516 while ((*rawp)[0] != '\0' && !isspace((*rawp)[0])) 517 ++*rawp; 518 519 tmp = (*rawp)[0]; 520 (*rawp)[0] = '\0'; 521 *namep = strdup(name); 522 523 if (*namep == NULL) 524 goto out_free_name; 525 526 (*rawp)[0] = tmp; 527 528 if ((*rawp)[0] != '\0') { 529 (*rawp)++; 530 while (isspace((*rawp)[0])) 531 ++(*rawp); 532 } 533 534 return 0; 535 536 out_free_name: 537 free(*namep); 538 *namep = NULL; 539 return -1; 540 } 541 542 static struct disasm_line *disasm_line__new(s64 offset, char *line, size_t privsize) 543 { 544 struct disasm_line *dl = zalloc(sizeof(*dl) + privsize); 545 546 if (dl != NULL) { 547 dl->offset = offset; 548 dl->line = strdup(line); 549 if (dl->line == NULL) 550 goto out_delete; 551 552 if (offset != -1) { 553 if (disasm_line__parse(dl->line, &dl->name, &dl->ops.raw) < 0) 554 goto out_free_line; 555 556 disasm_line__init_ins(dl); 557 } 558 } 559 560 return dl; 561 562 out_free_line: 563 free(dl->line); 564 out_delete: 565 free(dl); 566 return NULL; 567 } 568 569 void disasm_line__free(struct disasm_line *dl) 570 { 571 free(dl->line); 572 free(dl->name); 573 if (dl->ins && dl->ins->ops->free) 574 dl->ins->ops->free(&dl->ops); 575 else 576 ins__delete(&dl->ops); 577 free(dl); 578 } 579 580 int disasm_line__scnprintf(struct disasm_line *dl, char *bf, size_t size, bool raw) 581 { 582 if (raw || !dl->ins) 583 return scnprintf(bf, size, "%-6.6s %s", dl->name, dl->ops.raw); 584 585 return ins__scnprintf(dl->ins, bf, size, &dl->ops); 586 } 587 588 static void disasm__add(struct list_head *head, struct disasm_line *line) 589 { 590 list_add_tail(&line->node, head); 591 } 592 593 struct disasm_line *disasm__get_next_ip_line(struct list_head *head, struct disasm_line *pos) 594 { 595 list_for_each_entry_continue(pos, head, node) 596 if (pos->offset >= 0) 597 return pos; 598 599 return NULL; 600 } 601 602 static int disasm_line__print(struct disasm_line *dl, struct symbol *sym, u64 start, 603 int evidx, u64 len, int min_pcnt, int printed, 604 int max_lines, struct disasm_line *queue) 605 { 606 static const char *prev_line; 607 static const char *prev_color; 608 609 if (dl->offset != -1) { 610 const char *path = NULL; 611 unsigned int hits = 0; 612 double percent = 0.0; 613 const char *color; 614 struct annotation *notes = symbol__annotation(sym); 615 struct source_line *src_line = notes->src->lines; 616 struct sym_hist *h = annotation__histogram(notes, evidx); 617 s64 offset = dl->offset; 618 const u64 addr = start + offset; 619 struct disasm_line *next; 620 621 next = disasm__get_next_ip_line(¬es->src->source, dl); 622 623 while (offset < (s64)len && 624 (next == NULL || offset < next->offset)) { 625 if (src_line) { 626 if (path == NULL) 627 path = src_line[offset].path; 628 percent += src_line[offset].percent; 629 } else 630 hits += h->addr[offset]; 631 632 ++offset; 633 } 634 635 if (src_line == NULL && h->sum) 636 percent = 100.0 * hits / h->sum; 637 638 if (percent < min_pcnt) 639 return -1; 640 641 if (max_lines && printed >= max_lines) 642 return 1; 643 644 if (queue != NULL) { 645 list_for_each_entry_from(queue, ¬es->src->source, node) { 646 if (queue == dl) 647 break; 648 disasm_line__print(queue, sym, start, evidx, len, 649 0, 0, 1, NULL); 650 } 651 } 652 653 color = get_percent_color(percent); 654 655 /* 656 * Also color the filename and line if needed, with 657 * the same color than the percentage. Don't print it 658 * twice for close colored addr with the same filename:line 659 */ 660 if (path) { 661 if (!prev_line || strcmp(prev_line, path) 662 || color != prev_color) { 663 color_fprintf(stdout, color, " %s", path); 664 prev_line = path; 665 prev_color = color; 666 } 667 } 668 669 color_fprintf(stdout, color, " %7.2f", percent); 670 printf(" : "); 671 color_fprintf(stdout, PERF_COLOR_MAGENTA, " %" PRIx64 ":", addr); 672 color_fprintf(stdout, PERF_COLOR_BLUE, "%s\n", dl->line); 673 } else if (max_lines && printed >= max_lines) 674 return 1; 675 else { 676 if (queue) 677 return -1; 678 679 if (!*dl->line) 680 printf(" :\n"); 681 else 682 printf(" : %s\n", dl->line); 683 } 684 685 return 0; 686 } 687 688 static int symbol__parse_objdump_line(struct symbol *sym, struct map *map, 689 FILE *file, size_t privsize) 690 { 691 struct annotation *notes = symbol__annotation(sym); 692 struct disasm_line *dl; 693 char *line = NULL, *parsed_line, *tmp, *tmp2, *c; 694 size_t line_len; 695 s64 line_ip, offset = -1; 696 697 if (getline(&line, &line_len, file) < 0) 698 return -1; 699 700 if (!line) 701 return -1; 702 703 while (line_len != 0 && isspace(line[line_len - 1])) 704 line[--line_len] = '\0'; 705 706 c = strchr(line, '\n'); 707 if (c) 708 *c = 0; 709 710 line_ip = -1; 711 parsed_line = line; 712 713 /* 714 * Strip leading spaces: 715 */ 716 tmp = line; 717 while (*tmp) { 718 if (*tmp != ' ') 719 break; 720 tmp++; 721 } 722 723 if (*tmp) { 724 /* 725 * Parse hexa addresses followed by ':' 726 */ 727 line_ip = strtoull(tmp, &tmp2, 16); 728 if (*tmp2 != ':' || tmp == tmp2 || tmp2[1] == '\0') 729 line_ip = -1; 730 } 731 732 if (line_ip != -1) { 733 u64 start = map__rip_2objdump(map, sym->start), 734 end = map__rip_2objdump(map, sym->end); 735 736 offset = line_ip - start; 737 if (offset < 0 || (u64)line_ip > end) 738 offset = -1; 739 else 740 parsed_line = tmp2 + 1; 741 } 742 743 dl = disasm_line__new(offset, parsed_line, privsize); 744 free(line); 745 746 if (dl == NULL) 747 return -1; 748 749 disasm__add(¬es->src->source, dl); 750 751 return 0; 752 } 753 754 int symbol__annotate(struct symbol *sym, struct map *map, size_t privsize) 755 { 756 struct dso *dso = map->dso; 757 char *filename = dso__build_id_filename(dso, NULL, 0); 758 bool free_filename = true; 759 char command[PATH_MAX * 2]; 760 FILE *file; 761 int err = 0; 762 char symfs_filename[PATH_MAX]; 763 764 if (filename) { 765 snprintf(symfs_filename, sizeof(symfs_filename), "%s%s", 766 symbol_conf.symfs, filename); 767 } 768 769 if (filename == NULL) { 770 if (dso->has_build_id) { 771 pr_err("Can't annotate %s: not enough memory\n", 772 sym->name); 773 return -ENOMEM; 774 } 775 goto fallback; 776 } else if (readlink(symfs_filename, command, sizeof(command)) < 0 || 777 strstr(command, "[kernel.kallsyms]") || 778 access(symfs_filename, R_OK)) { 779 free(filename); 780 fallback: 781 /* 782 * If we don't have build-ids or the build-id file isn't in the 783 * cache, or is just a kallsyms file, well, lets hope that this 784 * DSO is the same as when 'perf record' ran. 785 */ 786 filename = dso->long_name; 787 snprintf(symfs_filename, sizeof(symfs_filename), "%s%s", 788 symbol_conf.symfs, filename); 789 free_filename = false; 790 } 791 792 if (dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS) { 793 char bf[BUILD_ID_SIZE * 2 + 16] = " with build id "; 794 char *build_id_msg = NULL; 795 796 if (dso->annotate_warned) 797 goto out_free_filename; 798 799 if (dso->has_build_id) { 800 build_id__sprintf(dso->build_id, 801 sizeof(dso->build_id), bf + 15); 802 build_id_msg = bf; 803 } 804 err = -ENOENT; 805 dso->annotate_warned = 1; 806 pr_err("Can't annotate %s:\n\n" 807 "No vmlinux file%s\nwas found in the path.\n\n" 808 "Please use:\n\n" 809 " perf buildid-cache -av vmlinux\n\n" 810 "or:\n\n" 811 " --vmlinux vmlinux\n", 812 sym->name, build_id_msg ?: ""); 813 goto out_free_filename; 814 } 815 816 pr_debug("%s: filename=%s, sym=%s, start=%#" PRIx64 ", end=%#" PRIx64 "\n", __func__, 817 filename, sym->name, map->unmap_ip(map, sym->start), 818 map->unmap_ip(map, sym->end)); 819 820 pr_debug("annotating [%p] %30s : [%p] %30s\n", 821 dso, dso->long_name, sym, sym->name); 822 823 snprintf(command, sizeof(command), 824 "%s %s%s --start-address=0x%016" PRIx64 825 " --stop-address=0x%016" PRIx64 826 " -d %s %s -C %s|grep -v %s|expand", 827 objdump_path ? objdump_path : "objdump", 828 disassembler_style ? "-M " : "", 829 disassembler_style ? disassembler_style : "", 830 map__rip_2objdump(map, sym->start), 831 map__rip_2objdump(map, sym->end+1), 832 symbol_conf.annotate_asm_raw ? "" : "--no-show-raw", 833 symbol_conf.annotate_src ? "-S" : "", 834 symfs_filename, filename); 835 836 pr_debug("Executing: %s\n", command); 837 838 file = popen(command, "r"); 839 if (!file) 840 goto out_free_filename; 841 842 while (!feof(file)) 843 if (symbol__parse_objdump_line(sym, map, file, privsize) < 0) 844 break; 845 846 pclose(file); 847 out_free_filename: 848 if (free_filename) 849 free(filename); 850 return err; 851 } 852 853 static void insert_source_line(struct rb_root *root, struct source_line *src_line) 854 { 855 struct source_line *iter; 856 struct rb_node **p = &root->rb_node; 857 struct rb_node *parent = NULL; 858 859 while (*p != NULL) { 860 parent = *p; 861 iter = rb_entry(parent, struct source_line, node); 862 863 if (src_line->percent > iter->percent) 864 p = &(*p)->rb_left; 865 else 866 p = &(*p)->rb_right; 867 } 868 869 rb_link_node(&src_line->node, parent, p); 870 rb_insert_color(&src_line->node, root); 871 } 872 873 static void symbol__free_source_line(struct symbol *sym, int len) 874 { 875 struct annotation *notes = symbol__annotation(sym); 876 struct source_line *src_line = notes->src->lines; 877 int i; 878 879 for (i = 0; i < len; i++) 880 free(src_line[i].path); 881 882 free(src_line); 883 notes->src->lines = NULL; 884 } 885 886 /* Get the filename:line for the colored entries */ 887 static int symbol__get_source_line(struct symbol *sym, struct map *map, 888 int evidx, struct rb_root *root, int len, 889 const char *filename) 890 { 891 u64 start; 892 int i; 893 char cmd[PATH_MAX * 2]; 894 struct source_line *src_line; 895 struct annotation *notes = symbol__annotation(sym); 896 struct sym_hist *h = annotation__histogram(notes, evidx); 897 898 if (!h->sum) 899 return 0; 900 901 src_line = notes->src->lines = calloc(len, sizeof(struct source_line)); 902 if (!notes->src->lines) 903 return -1; 904 905 start = map__rip_2objdump(map, sym->start); 906 907 for (i = 0; i < len; i++) { 908 char *path = NULL; 909 size_t line_len; 910 u64 offset; 911 FILE *fp; 912 913 src_line[i].percent = 100.0 * h->addr[i] / h->sum; 914 if (src_line[i].percent <= 0.5) 915 continue; 916 917 offset = start + i; 918 sprintf(cmd, "addr2line -e %s %016" PRIx64, filename, offset); 919 fp = popen(cmd, "r"); 920 if (!fp) 921 continue; 922 923 if (getline(&path, &line_len, fp) < 0 || !line_len) 924 goto next; 925 926 src_line[i].path = malloc(sizeof(char) * line_len + 1); 927 if (!src_line[i].path) 928 goto next; 929 930 strcpy(src_line[i].path, path); 931 insert_source_line(root, &src_line[i]); 932 933 next: 934 pclose(fp); 935 } 936 937 return 0; 938 } 939 940 static void print_summary(struct rb_root *root, const char *filename) 941 { 942 struct source_line *src_line; 943 struct rb_node *node; 944 945 printf("\nSorted summary for file %s\n", filename); 946 printf("----------------------------------------------\n\n"); 947 948 if (RB_EMPTY_ROOT(root)) { 949 printf(" Nothing higher than %1.1f%%\n", MIN_GREEN); 950 return; 951 } 952 953 node = rb_first(root); 954 while (node) { 955 double percent; 956 const char *color; 957 char *path; 958 959 src_line = rb_entry(node, struct source_line, node); 960 percent = src_line->percent; 961 color = get_percent_color(percent); 962 path = src_line->path; 963 964 color_fprintf(stdout, color, " %7.2f %s", percent, path); 965 node = rb_next(node); 966 } 967 } 968 969 static void symbol__annotate_hits(struct symbol *sym, int evidx) 970 { 971 struct annotation *notes = symbol__annotation(sym); 972 struct sym_hist *h = annotation__histogram(notes, evidx); 973 u64 len = symbol__size(sym), offset; 974 975 for (offset = 0; offset < len; ++offset) 976 if (h->addr[offset] != 0) 977 printf("%*" PRIx64 ": %" PRIu64 "\n", BITS_PER_LONG / 2, 978 sym->start + offset, h->addr[offset]); 979 printf("%*s: %" PRIu64 "\n", BITS_PER_LONG / 2, "h->sum", h->sum); 980 } 981 982 int symbol__annotate_printf(struct symbol *sym, struct map *map, int evidx, 983 bool full_paths, int min_pcnt, int max_lines, 984 int context) 985 { 986 struct dso *dso = map->dso; 987 char *filename; 988 const char *d_filename; 989 struct annotation *notes = symbol__annotation(sym); 990 struct disasm_line *pos, *queue = NULL; 991 u64 start = map__rip_2objdump(map, sym->start); 992 int printed = 2, queue_len = 0; 993 int more = 0; 994 u64 len; 995 996 filename = strdup(dso->long_name); 997 if (!filename) 998 return -ENOMEM; 999 1000 if (full_paths) 1001 d_filename = filename; 1002 else 1003 d_filename = basename(filename); 1004 1005 len = symbol__size(sym); 1006 1007 printf(" Percent | Source code & Disassembly of %s\n", d_filename); 1008 printf("------------------------------------------------\n"); 1009 1010 if (verbose) 1011 symbol__annotate_hits(sym, evidx); 1012 1013 list_for_each_entry(pos, ¬es->src->source, node) { 1014 if (context && queue == NULL) { 1015 queue = pos; 1016 queue_len = 0; 1017 } 1018 1019 switch (disasm_line__print(pos, sym, start, evidx, len, 1020 min_pcnt, printed, max_lines, 1021 queue)) { 1022 case 0: 1023 ++printed; 1024 if (context) { 1025 printed += queue_len; 1026 queue = NULL; 1027 queue_len = 0; 1028 } 1029 break; 1030 case 1: 1031 /* filtered by max_lines */ 1032 ++more; 1033 break; 1034 case -1: 1035 default: 1036 /* 1037 * Filtered by min_pcnt or non IP lines when 1038 * context != 0 1039 */ 1040 if (!context) 1041 break; 1042 if (queue_len == context) 1043 queue = list_entry(queue->node.next, typeof(*queue), node); 1044 else 1045 ++queue_len; 1046 break; 1047 } 1048 } 1049 1050 free(filename); 1051 1052 return more; 1053 } 1054 1055 void symbol__annotate_zero_histogram(struct symbol *sym, int evidx) 1056 { 1057 struct annotation *notes = symbol__annotation(sym); 1058 struct sym_hist *h = annotation__histogram(notes, evidx); 1059 1060 memset(h, 0, notes->src->sizeof_sym_hist); 1061 } 1062 1063 void symbol__annotate_decay_histogram(struct symbol *sym, int evidx) 1064 { 1065 struct annotation *notes = symbol__annotation(sym); 1066 struct sym_hist *h = annotation__histogram(notes, evidx); 1067 int len = symbol__size(sym), offset; 1068 1069 h->sum = 0; 1070 for (offset = 0; offset < len; ++offset) { 1071 h->addr[offset] = h->addr[offset] * 7 / 8; 1072 h->sum += h->addr[offset]; 1073 } 1074 } 1075 1076 void disasm__purge(struct list_head *head) 1077 { 1078 struct disasm_line *pos, *n; 1079 1080 list_for_each_entry_safe(pos, n, head, node) { 1081 list_del(&pos->node); 1082 disasm_line__free(pos); 1083 } 1084 } 1085 1086 static size_t disasm_line__fprintf(struct disasm_line *dl, FILE *fp) 1087 { 1088 size_t printed; 1089 1090 if (dl->offset == -1) 1091 return fprintf(fp, "%s\n", dl->line); 1092 1093 printed = fprintf(fp, "%#" PRIx64 " %s", dl->offset, dl->name); 1094 1095 if (dl->ops.raw[0] != '\0') { 1096 printed += fprintf(fp, "%.*s %s\n", 6 - (int)printed, " ", 1097 dl->ops.raw); 1098 } 1099 1100 return printed + fprintf(fp, "\n"); 1101 } 1102 1103 size_t disasm__fprintf(struct list_head *head, FILE *fp) 1104 { 1105 struct disasm_line *pos; 1106 size_t printed = 0; 1107 1108 list_for_each_entry(pos, head, node) 1109 printed += disasm_line__fprintf(pos, fp); 1110 1111 return printed; 1112 } 1113 1114 int symbol__tty_annotate(struct symbol *sym, struct map *map, int evidx, 1115 bool print_lines, bool full_paths, int min_pcnt, 1116 int max_lines) 1117 { 1118 struct dso *dso = map->dso; 1119 const char *filename = dso->long_name; 1120 struct rb_root source_line = RB_ROOT; 1121 u64 len; 1122 1123 if (symbol__annotate(sym, map, 0) < 0) 1124 return -1; 1125 1126 len = symbol__size(sym); 1127 1128 if (print_lines) { 1129 symbol__get_source_line(sym, map, evidx, &source_line, 1130 len, filename); 1131 print_summary(&source_line, filename); 1132 } 1133 1134 symbol__annotate_printf(sym, map, evidx, full_paths, 1135 min_pcnt, max_lines, 0); 1136 if (print_lines) 1137 symbol__free_source_line(sym, len); 1138 1139 disasm__purge(&symbol__annotation(sym)->src->source); 1140 1141 return 0; 1142 } 1143