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