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 #include <linux/bitops.h> 19 20 const char *disassembler_style; 21 const char *objdump_path; 22 23 static struct ins *ins__find(const char *name); 24 static int disasm_line__parse(char *line, char **namep, char **rawp); 25 26 static void ins__delete(struct ins_operands *ops) 27 { 28 free(ops->source.raw); 29 free(ops->source.name); 30 free(ops->target.raw); 31 free(ops->target.name); 32 } 33 34 static int ins__raw_scnprintf(struct ins *ins, char *bf, size_t size, 35 struct ins_operands *ops) 36 { 37 return scnprintf(bf, size, "%-6.6s %s", ins->name, ops->raw); 38 } 39 40 int ins__scnprintf(struct ins *ins, char *bf, size_t size, 41 struct ins_operands *ops) 42 { 43 if (ins->ops->scnprintf) 44 return ins->ops->scnprintf(ins, bf, size, ops); 45 46 return ins__raw_scnprintf(ins, bf, size, ops); 47 } 48 49 static int call__parse(struct ins_operands *ops) 50 { 51 char *endptr, *tok, *name; 52 53 ops->target.addr = strtoull(ops->raw, &endptr, 16); 54 55 name = strchr(endptr, '<'); 56 if (name == NULL) 57 goto indirect_call; 58 59 name++; 60 61 tok = strchr(name, '>'); 62 if (tok == NULL) 63 return -1; 64 65 *tok = '\0'; 66 ops->target.name = strdup(name); 67 *tok = '>'; 68 69 return ops->target.name == NULL ? -1 : 0; 70 71 indirect_call: 72 tok = strchr(endptr, '('); 73 if (tok != NULL) { 74 ops->target.addr = 0; 75 return 0; 76 } 77 78 tok = strchr(endptr, '*'); 79 if (tok == NULL) 80 return -1; 81 82 ops->target.addr = strtoull(tok + 1, NULL, 16); 83 return 0; 84 } 85 86 static int call__scnprintf(struct ins *ins, char *bf, size_t size, 87 struct ins_operands *ops) 88 { 89 if (ops->target.name) 90 return scnprintf(bf, size, "%-6.6s %s", ins->name, ops->target.name); 91 92 if (ops->target.addr == 0) 93 return ins__raw_scnprintf(ins, bf, size, ops); 94 95 return scnprintf(bf, size, "%-6.6s *%" PRIx64, ins->name, ops->target.addr); 96 } 97 98 static struct ins_ops call_ops = { 99 .parse = call__parse, 100 .scnprintf = call__scnprintf, 101 }; 102 103 bool ins__is_call(const struct ins *ins) 104 { 105 return ins->ops == &call_ops; 106 } 107 108 static int jump__parse(struct ins_operands *ops) 109 { 110 const char *s = strchr(ops->raw, '+'); 111 112 ops->target.addr = strtoll(ops->raw, NULL, 16); 113 114 if (s++ != NULL) 115 ops->target.offset = strtoll(s, NULL, 16); 116 else 117 ops->target.offset = UINT64_MAX; 118 119 return 0; 120 } 121 122 static int jump__scnprintf(struct ins *ins, char *bf, size_t size, 123 struct ins_operands *ops) 124 { 125 return scnprintf(bf, size, "%-6.6s %" PRIx64, ins->name, ops->target.offset); 126 } 127 128 static struct ins_ops jump_ops = { 129 .parse = jump__parse, 130 .scnprintf = jump__scnprintf, 131 }; 132 133 bool ins__is_jump(const struct ins *ins) 134 { 135 return ins->ops == &jump_ops; 136 } 137 138 static int comment__symbol(char *raw, char *comment, u64 *addrp, char **namep) 139 { 140 char *endptr, *name, *t; 141 142 if (strstr(raw, "(%rip)") == NULL) 143 return 0; 144 145 *addrp = strtoull(comment, &endptr, 16); 146 name = strchr(endptr, '<'); 147 if (name == NULL) 148 return -1; 149 150 name++; 151 152 t = strchr(name, '>'); 153 if (t == NULL) 154 return 0; 155 156 *t = '\0'; 157 *namep = strdup(name); 158 *t = '>'; 159 160 return 0; 161 } 162 163 static int lock__parse(struct ins_operands *ops) 164 { 165 char *name; 166 167 ops->locked.ops = zalloc(sizeof(*ops->locked.ops)); 168 if (ops->locked.ops == NULL) 169 return 0; 170 171 if (disasm_line__parse(ops->raw, &name, &ops->locked.ops->raw) < 0) 172 goto out_free_ops; 173 174 ops->locked.ins = ins__find(name); 175 if (ops->locked.ins == NULL) 176 goto out_free_ops; 177 178 if (!ops->locked.ins->ops) 179 return 0; 180 181 if (ops->locked.ins->ops->parse) 182 ops->locked.ins->ops->parse(ops->locked.ops); 183 184 return 0; 185 186 out_free_ops: 187 free(ops->locked.ops); 188 ops->locked.ops = NULL; 189 return 0; 190 } 191 192 static int lock__scnprintf(struct ins *ins, char *bf, size_t size, 193 struct ins_operands *ops) 194 { 195 int printed; 196 197 if (ops->locked.ins == NULL) 198 return ins__raw_scnprintf(ins, bf, size, ops); 199 200 printed = scnprintf(bf, size, "%-6.6s ", ins->name); 201 return printed + ins__scnprintf(ops->locked.ins, bf + printed, 202 size - printed, ops->locked.ops); 203 } 204 205 static void lock__delete(struct ins_operands *ops) 206 { 207 free(ops->locked.ops); 208 free(ops->target.raw); 209 free(ops->target.name); 210 } 211 212 static struct ins_ops lock_ops = { 213 .free = lock__delete, 214 .parse = lock__parse, 215 .scnprintf = lock__scnprintf, 216 }; 217 218 static int mov__parse(struct ins_operands *ops) 219 { 220 char *s = strchr(ops->raw, ','), *target, *comment, prev; 221 222 if (s == NULL) 223 return -1; 224 225 *s = '\0'; 226 ops->source.raw = strdup(ops->raw); 227 *s = ','; 228 229 if (ops->source.raw == NULL) 230 return -1; 231 232 target = ++s; 233 234 while (s[0] != '\0' && !isspace(s[0])) 235 ++s; 236 prev = *s; 237 *s = '\0'; 238 239 ops->target.raw = strdup(target); 240 *s = prev; 241 242 if (ops->target.raw == NULL) 243 goto out_free_source; 244 245 comment = strchr(s, '#'); 246 if (comment == NULL) 247 return 0; 248 249 while (comment[0] != '\0' && isspace(comment[0])) 250 ++comment; 251 252 comment__symbol(ops->source.raw, comment, &ops->source.addr, &ops->source.name); 253 comment__symbol(ops->target.raw, comment, &ops->target.addr, &ops->target.name); 254 255 return 0; 256 257 out_free_source: 258 free(ops->source.raw); 259 ops->source.raw = NULL; 260 return -1; 261 } 262 263 static int mov__scnprintf(struct ins *ins, char *bf, size_t size, 264 struct ins_operands *ops) 265 { 266 return scnprintf(bf, size, "%-6.6s %s,%s", ins->name, 267 ops->source.name ?: ops->source.raw, 268 ops->target.name ?: ops->target.raw); 269 } 270 271 static struct ins_ops mov_ops = { 272 .parse = mov__parse, 273 .scnprintf = mov__scnprintf, 274 }; 275 276 static int dec__parse(struct ins_operands *ops) 277 { 278 char *target, *comment, *s, prev; 279 280 target = s = ops->raw; 281 282 while (s[0] != '\0' && !isspace(s[0])) 283 ++s; 284 prev = *s; 285 *s = '\0'; 286 287 ops->target.raw = strdup(target); 288 *s = prev; 289 290 if (ops->target.raw == NULL) 291 return -1; 292 293 comment = strchr(s, '#'); 294 if (comment == NULL) 295 return 0; 296 297 while (comment[0] != '\0' && isspace(comment[0])) 298 ++comment; 299 300 comment__symbol(ops->target.raw, comment, &ops->target.addr, &ops->target.name); 301 302 return 0; 303 } 304 305 static int dec__scnprintf(struct ins *ins, char *bf, size_t size, 306 struct ins_operands *ops) 307 { 308 return scnprintf(bf, size, "%-6.6s %s", ins->name, 309 ops->target.name ?: ops->target.raw); 310 } 311 312 static struct ins_ops dec_ops = { 313 .parse = dec__parse, 314 .scnprintf = dec__scnprintf, 315 }; 316 317 static int nop__scnprintf(struct ins *ins __maybe_unused, char *bf, size_t size, 318 struct ins_operands *ops __maybe_unused) 319 { 320 return scnprintf(bf, size, "%-6.6s", "nop"); 321 } 322 323 static struct ins_ops nop_ops = { 324 .scnprintf = nop__scnprintf, 325 }; 326 327 /* 328 * Must be sorted by name! 329 */ 330 static struct ins instructions[] = { 331 { .name = "add", .ops = &mov_ops, }, 332 { .name = "addl", .ops = &mov_ops, }, 333 { .name = "addq", .ops = &mov_ops, }, 334 { .name = "addw", .ops = &mov_ops, }, 335 { .name = "and", .ops = &mov_ops, }, 336 { .name = "bts", .ops = &mov_ops, }, 337 { .name = "call", .ops = &call_ops, }, 338 { .name = "callq", .ops = &call_ops, }, 339 { .name = "cmp", .ops = &mov_ops, }, 340 { .name = "cmpb", .ops = &mov_ops, }, 341 { .name = "cmpl", .ops = &mov_ops, }, 342 { .name = "cmpq", .ops = &mov_ops, }, 343 { .name = "cmpw", .ops = &mov_ops, }, 344 { .name = "cmpxch", .ops = &mov_ops, }, 345 { .name = "dec", .ops = &dec_ops, }, 346 { .name = "decl", .ops = &dec_ops, }, 347 { .name = "imul", .ops = &mov_ops, }, 348 { .name = "inc", .ops = &dec_ops, }, 349 { .name = "incl", .ops = &dec_ops, }, 350 { .name = "ja", .ops = &jump_ops, }, 351 { .name = "jae", .ops = &jump_ops, }, 352 { .name = "jb", .ops = &jump_ops, }, 353 { .name = "jbe", .ops = &jump_ops, }, 354 { .name = "jc", .ops = &jump_ops, }, 355 { .name = "jcxz", .ops = &jump_ops, }, 356 { .name = "je", .ops = &jump_ops, }, 357 { .name = "jecxz", .ops = &jump_ops, }, 358 { .name = "jg", .ops = &jump_ops, }, 359 { .name = "jge", .ops = &jump_ops, }, 360 { .name = "jl", .ops = &jump_ops, }, 361 { .name = "jle", .ops = &jump_ops, }, 362 { .name = "jmp", .ops = &jump_ops, }, 363 { .name = "jmpq", .ops = &jump_ops, }, 364 { .name = "jna", .ops = &jump_ops, }, 365 { .name = "jnae", .ops = &jump_ops, }, 366 { .name = "jnb", .ops = &jump_ops, }, 367 { .name = "jnbe", .ops = &jump_ops, }, 368 { .name = "jnc", .ops = &jump_ops, }, 369 { .name = "jne", .ops = &jump_ops, }, 370 { .name = "jng", .ops = &jump_ops, }, 371 { .name = "jnge", .ops = &jump_ops, }, 372 { .name = "jnl", .ops = &jump_ops, }, 373 { .name = "jnle", .ops = &jump_ops, }, 374 { .name = "jno", .ops = &jump_ops, }, 375 { .name = "jnp", .ops = &jump_ops, }, 376 { .name = "jns", .ops = &jump_ops, }, 377 { .name = "jnz", .ops = &jump_ops, }, 378 { .name = "jo", .ops = &jump_ops, }, 379 { .name = "jp", .ops = &jump_ops, }, 380 { .name = "jpe", .ops = &jump_ops, }, 381 { .name = "jpo", .ops = &jump_ops, }, 382 { .name = "jrcxz", .ops = &jump_ops, }, 383 { .name = "js", .ops = &jump_ops, }, 384 { .name = "jz", .ops = &jump_ops, }, 385 { .name = "lea", .ops = &mov_ops, }, 386 { .name = "lock", .ops = &lock_ops, }, 387 { .name = "mov", .ops = &mov_ops, }, 388 { .name = "movb", .ops = &mov_ops, }, 389 { .name = "movdqa",.ops = &mov_ops, }, 390 { .name = "movl", .ops = &mov_ops, }, 391 { .name = "movq", .ops = &mov_ops, }, 392 { .name = "movslq", .ops = &mov_ops, }, 393 { .name = "movzbl", .ops = &mov_ops, }, 394 { .name = "movzwl", .ops = &mov_ops, }, 395 { .name = "nop", .ops = &nop_ops, }, 396 { .name = "nopl", .ops = &nop_ops, }, 397 { .name = "nopw", .ops = &nop_ops, }, 398 { .name = "or", .ops = &mov_ops, }, 399 { .name = "orl", .ops = &mov_ops, }, 400 { .name = "test", .ops = &mov_ops, }, 401 { .name = "testb", .ops = &mov_ops, }, 402 { .name = "testl", .ops = &mov_ops, }, 403 { .name = "xadd", .ops = &mov_ops, }, 404 { .name = "xbeginl", .ops = &jump_ops, }, 405 { .name = "xbeginq", .ops = &jump_ops, }, 406 }; 407 408 static int ins__cmp(const void *name, const void *insp) 409 { 410 const struct ins *ins = insp; 411 412 return strcmp(name, ins->name); 413 } 414 415 static struct ins *ins__find(const char *name) 416 { 417 const int nmemb = ARRAY_SIZE(instructions); 418 419 return bsearch(name, instructions, nmemb, sizeof(struct ins), ins__cmp); 420 } 421 422 int symbol__annotate_init(struct map *map __maybe_unused, struct symbol *sym) 423 { 424 struct annotation *notes = symbol__annotation(sym); 425 pthread_mutex_init(¬es->lock, NULL); 426 return 0; 427 } 428 429 int symbol__alloc_hist(struct symbol *sym) 430 { 431 struct annotation *notes = symbol__annotation(sym); 432 const size_t size = symbol__size(sym); 433 size_t sizeof_sym_hist; 434 435 /* Check for overflow when calculating sizeof_sym_hist */ 436 if (size > (SIZE_MAX - sizeof(struct sym_hist)) / sizeof(u64)) 437 return -1; 438 439 sizeof_sym_hist = (sizeof(struct sym_hist) + size * sizeof(u64)); 440 441 /* Check for overflow in zalloc argument */ 442 if (sizeof_sym_hist > (SIZE_MAX - sizeof(*notes->src)) 443 / symbol_conf.nr_events) 444 return -1; 445 446 notes->src = zalloc(sizeof(*notes->src) + symbol_conf.nr_events * sizeof_sym_hist); 447 if (notes->src == NULL) 448 return -1; 449 notes->src->sizeof_sym_hist = sizeof_sym_hist; 450 notes->src->nr_histograms = symbol_conf.nr_events; 451 INIT_LIST_HEAD(¬es->src->source); 452 return 0; 453 } 454 455 void symbol__annotate_zero_histograms(struct symbol *sym) 456 { 457 struct annotation *notes = symbol__annotation(sym); 458 459 pthread_mutex_lock(¬es->lock); 460 if (notes->src != NULL) 461 memset(notes->src->histograms, 0, 462 notes->src->nr_histograms * notes->src->sizeof_sym_hist); 463 pthread_mutex_unlock(¬es->lock); 464 } 465 466 int symbol__inc_addr_samples(struct symbol *sym, struct map *map, 467 int evidx, u64 addr) 468 { 469 unsigned offset; 470 struct annotation *notes; 471 struct sym_hist *h; 472 473 notes = symbol__annotation(sym); 474 if (notes->src == NULL) 475 return -ENOMEM; 476 477 pr_debug3("%s: addr=%#" PRIx64 "\n", __func__, map->unmap_ip(map, addr)); 478 479 if (addr < sym->start || addr > sym->end) 480 return -ERANGE; 481 482 offset = addr - sym->start; 483 h = annotation__histogram(notes, evidx); 484 h->sum++; 485 h->addr[offset]++; 486 487 pr_debug3("%#" PRIx64 " %s: period++ [addr: %#" PRIx64 ", %#" PRIx64 488 ", evidx=%d] => %" PRIu64 "\n", sym->start, sym->name, 489 addr, addr - sym->start, evidx, h->addr[offset]); 490 return 0; 491 } 492 493 static void disasm_line__init_ins(struct disasm_line *dl) 494 { 495 dl->ins = ins__find(dl->name); 496 497 if (dl->ins == NULL) 498 return; 499 500 if (!dl->ins->ops) 501 return; 502 503 if (dl->ins->ops->parse) 504 dl->ins->ops->parse(&dl->ops); 505 } 506 507 static int disasm_line__parse(char *line, char **namep, char **rawp) 508 { 509 char *name = line, tmp; 510 511 while (isspace(name[0])) 512 ++name; 513 514 if (name[0] == '\0') 515 return -1; 516 517 *rawp = name + 1; 518 519 while ((*rawp)[0] != '\0' && !isspace((*rawp)[0])) 520 ++*rawp; 521 522 tmp = (*rawp)[0]; 523 (*rawp)[0] = '\0'; 524 *namep = strdup(name); 525 526 if (*namep == NULL) 527 goto out_free_name; 528 529 (*rawp)[0] = tmp; 530 531 if ((*rawp)[0] != '\0') { 532 (*rawp)++; 533 while (isspace((*rawp)[0])) 534 ++(*rawp); 535 } 536 537 return 0; 538 539 out_free_name: 540 free(*namep); 541 *namep = NULL; 542 return -1; 543 } 544 545 static struct disasm_line *disasm_line__new(s64 offset, char *line, size_t privsize) 546 { 547 struct disasm_line *dl = zalloc(sizeof(*dl) + privsize); 548 549 if (dl != NULL) { 550 dl->offset = offset; 551 dl->line = strdup(line); 552 if (dl->line == NULL) 553 goto out_delete; 554 555 if (offset != -1) { 556 if (disasm_line__parse(dl->line, &dl->name, &dl->ops.raw) < 0) 557 goto out_free_line; 558 559 disasm_line__init_ins(dl); 560 } 561 } 562 563 return dl; 564 565 out_free_line: 566 free(dl->line); 567 out_delete: 568 free(dl); 569 return NULL; 570 } 571 572 void disasm_line__free(struct disasm_line *dl) 573 { 574 free(dl->line); 575 free(dl->name); 576 if (dl->ins && dl->ins->ops->free) 577 dl->ins->ops->free(&dl->ops); 578 else 579 ins__delete(&dl->ops); 580 free(dl); 581 } 582 583 int disasm_line__scnprintf(struct disasm_line *dl, char *bf, size_t size, bool raw) 584 { 585 if (raw || !dl->ins) 586 return scnprintf(bf, size, "%-6.6s %s", dl->name, dl->ops.raw); 587 588 return ins__scnprintf(dl->ins, bf, size, &dl->ops); 589 } 590 591 static void disasm__add(struct list_head *head, struct disasm_line *line) 592 { 593 list_add_tail(&line->node, head); 594 } 595 596 struct disasm_line *disasm__get_next_ip_line(struct list_head *head, struct disasm_line *pos) 597 { 598 list_for_each_entry_continue(pos, head, node) 599 if (pos->offset >= 0) 600 return pos; 601 602 return NULL; 603 } 604 605 static int disasm_line__print(struct disasm_line *dl, struct symbol *sym, u64 start, 606 int evidx, u64 len, int min_pcnt, int printed, 607 int max_lines, struct disasm_line *queue) 608 { 609 static const char *prev_line; 610 static const char *prev_color; 611 612 if (dl->offset != -1) { 613 const char *path = NULL; 614 unsigned int hits = 0; 615 double percent = 0.0; 616 const char *color; 617 struct annotation *notes = symbol__annotation(sym); 618 struct source_line *src_line = notes->src->lines; 619 struct sym_hist *h = annotation__histogram(notes, evidx); 620 s64 offset = dl->offset; 621 const u64 addr = start + offset; 622 struct disasm_line *next; 623 624 next = disasm__get_next_ip_line(¬es->src->source, dl); 625 626 while (offset < (s64)len && 627 (next == NULL || offset < next->offset)) { 628 if (src_line) { 629 if (path == NULL) 630 path = src_line[offset].path; 631 percent += src_line[offset].percent; 632 } else 633 hits += h->addr[offset]; 634 635 ++offset; 636 } 637 638 if (src_line == NULL && h->sum) 639 percent = 100.0 * hits / h->sum; 640 641 if (percent < min_pcnt) 642 return -1; 643 644 if (max_lines && printed >= max_lines) 645 return 1; 646 647 if (queue != NULL) { 648 list_for_each_entry_from(queue, ¬es->src->source, node) { 649 if (queue == dl) 650 break; 651 disasm_line__print(queue, sym, start, evidx, len, 652 0, 0, 1, NULL); 653 } 654 } 655 656 color = get_percent_color(percent); 657 658 /* 659 * Also color the filename and line if needed, with 660 * the same color than the percentage. Don't print it 661 * twice for close colored addr with the same filename:line 662 */ 663 if (path) { 664 if (!prev_line || strcmp(prev_line, path) 665 || color != prev_color) { 666 color_fprintf(stdout, color, " %s", path); 667 prev_line = path; 668 prev_color = color; 669 } 670 } 671 672 color_fprintf(stdout, color, " %7.2f", percent); 673 printf(" : "); 674 color_fprintf(stdout, PERF_COLOR_MAGENTA, " %" PRIx64 ":", addr); 675 color_fprintf(stdout, PERF_COLOR_BLUE, "%s\n", dl->line); 676 } else if (max_lines && printed >= max_lines) 677 return 1; 678 else { 679 if (queue) 680 return -1; 681 682 if (!*dl->line) 683 printf(" :\n"); 684 else 685 printf(" : %s\n", dl->line); 686 } 687 688 return 0; 689 } 690 691 static int symbol__parse_objdump_line(struct symbol *sym, struct map *map, 692 FILE *file, size_t privsize) 693 { 694 struct annotation *notes = symbol__annotation(sym); 695 struct disasm_line *dl; 696 char *line = NULL, *parsed_line, *tmp, *tmp2, *c; 697 size_t line_len; 698 s64 line_ip, offset = -1; 699 700 if (getline(&line, &line_len, file) < 0) 701 return -1; 702 703 if (!line) 704 return -1; 705 706 while (line_len != 0 && isspace(line[line_len - 1])) 707 line[--line_len] = '\0'; 708 709 c = strchr(line, '\n'); 710 if (c) 711 *c = 0; 712 713 line_ip = -1; 714 parsed_line = line; 715 716 /* 717 * Strip leading spaces: 718 */ 719 tmp = line; 720 while (*tmp) { 721 if (*tmp != ' ') 722 break; 723 tmp++; 724 } 725 726 if (*tmp) { 727 /* 728 * Parse hexa addresses followed by ':' 729 */ 730 line_ip = strtoull(tmp, &tmp2, 16); 731 if (*tmp2 != ':' || tmp == tmp2 || tmp2[1] == '\0') 732 line_ip = -1; 733 } 734 735 if (line_ip != -1) { 736 u64 start = map__rip_2objdump(map, sym->start), 737 end = map__rip_2objdump(map, sym->end); 738 739 offset = line_ip - start; 740 if (offset < 0 || (u64)line_ip > end) 741 offset = -1; 742 else 743 parsed_line = tmp2 + 1; 744 } 745 746 dl = disasm_line__new(offset, parsed_line, privsize); 747 free(line); 748 749 if (dl == NULL) 750 return -1; 751 752 disasm__add(¬es->src->source, dl); 753 754 return 0; 755 } 756 757 int symbol__annotate(struct symbol *sym, struct map *map, size_t privsize) 758 { 759 struct dso *dso = map->dso; 760 char *filename = dso__build_id_filename(dso, NULL, 0); 761 bool free_filename = true; 762 char command[PATH_MAX * 2]; 763 FILE *file; 764 int err = 0; 765 char symfs_filename[PATH_MAX]; 766 767 if (filename) { 768 snprintf(symfs_filename, sizeof(symfs_filename), "%s%s", 769 symbol_conf.symfs, filename); 770 } 771 772 if (filename == NULL) { 773 if (dso->has_build_id) { 774 pr_err("Can't annotate %s: not enough memory\n", 775 sym->name); 776 return -ENOMEM; 777 } 778 goto fallback; 779 } else if (readlink(symfs_filename, command, sizeof(command)) < 0 || 780 strstr(command, "[kernel.kallsyms]") || 781 access(symfs_filename, R_OK)) { 782 free(filename); 783 fallback: 784 /* 785 * If we don't have build-ids or the build-id file isn't in the 786 * cache, or is just a kallsyms file, well, lets hope that this 787 * DSO is the same as when 'perf record' ran. 788 */ 789 filename = dso->long_name; 790 snprintf(symfs_filename, sizeof(symfs_filename), "%s%s", 791 symbol_conf.symfs, filename); 792 free_filename = false; 793 } 794 795 if (dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS) { 796 char bf[BUILD_ID_SIZE * 2 + 16] = " with build id "; 797 char *build_id_msg = NULL; 798 799 if (dso->annotate_warned) 800 goto out_free_filename; 801 802 if (dso->has_build_id) { 803 build_id__sprintf(dso->build_id, 804 sizeof(dso->build_id), bf + 15); 805 build_id_msg = bf; 806 } 807 err = -ENOENT; 808 dso->annotate_warned = 1; 809 pr_err("Can't annotate %s:\n\n" 810 "No vmlinux file%s\nwas found in the path.\n\n" 811 "Please use:\n\n" 812 " perf buildid-cache -av vmlinux\n\n" 813 "or:\n\n" 814 " --vmlinux vmlinux\n", 815 sym->name, build_id_msg ?: ""); 816 goto out_free_filename; 817 } 818 819 pr_debug("%s: filename=%s, sym=%s, start=%#" PRIx64 ", end=%#" PRIx64 "\n", __func__, 820 filename, sym->name, map->unmap_ip(map, sym->start), 821 map->unmap_ip(map, sym->end)); 822 823 pr_debug("annotating [%p] %30s : [%p] %30s\n", 824 dso, dso->long_name, sym, sym->name); 825 826 snprintf(command, sizeof(command), 827 "%s %s%s --start-address=0x%016" PRIx64 828 " --stop-address=0x%016" PRIx64 829 " -d %s %s -C %s|grep -v %s|expand", 830 objdump_path ? objdump_path : "objdump", 831 disassembler_style ? "-M " : "", 832 disassembler_style ? disassembler_style : "", 833 map__rip_2objdump(map, sym->start), 834 map__rip_2objdump(map, sym->end+1), 835 symbol_conf.annotate_asm_raw ? "" : "--no-show-raw", 836 symbol_conf.annotate_src ? "-S" : "", 837 symfs_filename, filename); 838 839 pr_debug("Executing: %s\n", command); 840 841 file = popen(command, "r"); 842 if (!file) 843 goto out_free_filename; 844 845 while (!feof(file)) 846 if (symbol__parse_objdump_line(sym, map, file, privsize) < 0) 847 break; 848 849 pclose(file); 850 out_free_filename: 851 if (free_filename) 852 free(filename); 853 return err; 854 } 855 856 static void insert_source_line(struct rb_root *root, struct source_line *src_line) 857 { 858 struct source_line *iter; 859 struct rb_node **p = &root->rb_node; 860 struct rb_node *parent = NULL; 861 int ret; 862 863 while (*p != NULL) { 864 parent = *p; 865 iter = rb_entry(parent, struct source_line, node); 866 867 ret = strcmp(iter->path, src_line->path); 868 if (ret == 0) { 869 iter->percent_sum += src_line->percent; 870 return; 871 } 872 873 if (ret < 0) 874 p = &(*p)->rb_left; 875 else 876 p = &(*p)->rb_right; 877 } 878 879 src_line->percent_sum = src_line->percent; 880 881 rb_link_node(&src_line->node, parent, p); 882 rb_insert_color(&src_line->node, root); 883 } 884 885 static void __resort_source_line(struct rb_root *root, struct source_line *src_line) 886 { 887 struct source_line *iter; 888 struct rb_node **p = &root->rb_node; 889 struct rb_node *parent = NULL; 890 891 while (*p != NULL) { 892 parent = *p; 893 iter = rb_entry(parent, struct source_line, node); 894 895 if (src_line->percent_sum > iter->percent_sum) 896 p = &(*p)->rb_left; 897 else 898 p = &(*p)->rb_right; 899 } 900 901 rb_link_node(&src_line->node, parent, p); 902 rb_insert_color(&src_line->node, root); 903 } 904 905 static void resort_source_line(struct rb_root *dest_root, struct rb_root *src_root) 906 { 907 struct source_line *src_line; 908 struct rb_node *node; 909 910 node = rb_first(src_root); 911 while (node) { 912 struct rb_node *next; 913 914 src_line = rb_entry(node, struct source_line, node); 915 next = rb_next(node); 916 rb_erase(node, src_root); 917 918 __resort_source_line(dest_root, src_line); 919 node = next; 920 } 921 } 922 923 static void symbol__free_source_line(struct symbol *sym, int len) 924 { 925 struct annotation *notes = symbol__annotation(sym); 926 struct source_line *src_line = notes->src->lines; 927 int i; 928 929 for (i = 0; i < len; i++) 930 free(src_line[i].path); 931 932 free(src_line); 933 notes->src->lines = NULL; 934 } 935 936 /* Get the filename:line for the colored entries */ 937 static int symbol__get_source_line(struct symbol *sym, struct map *map, 938 int evidx, struct rb_root *root, int len, 939 const char *filename) 940 { 941 u64 start; 942 int i; 943 char cmd[PATH_MAX * 2]; 944 struct source_line *src_line; 945 struct annotation *notes = symbol__annotation(sym); 946 struct sym_hist *h = annotation__histogram(notes, evidx); 947 struct rb_root tmp_root = RB_ROOT; 948 949 if (!h->sum) 950 return 0; 951 952 src_line = notes->src->lines = calloc(len, sizeof(struct source_line)); 953 if (!notes->src->lines) 954 return -1; 955 956 start = map__rip_2objdump(map, sym->start); 957 958 for (i = 0; i < len; i++) { 959 char *path = NULL; 960 size_t line_len; 961 u64 offset; 962 FILE *fp; 963 964 src_line[i].percent = 100.0 * h->addr[i] / h->sum; 965 if (src_line[i].percent <= 0.5) 966 continue; 967 968 offset = start + i; 969 sprintf(cmd, "addr2line -e %s %016" PRIx64, filename, offset); 970 fp = popen(cmd, "r"); 971 if (!fp) 972 continue; 973 974 if (getline(&path, &line_len, fp) < 0 || !line_len) 975 goto next; 976 977 src_line[i].path = malloc(sizeof(char) * line_len + 1); 978 if (!src_line[i].path) 979 goto next; 980 981 strcpy(src_line[i].path, path); 982 insert_source_line(&tmp_root, &src_line[i]); 983 984 next: 985 pclose(fp); 986 } 987 988 resort_source_line(root, &tmp_root); 989 return 0; 990 } 991 992 static void print_summary(struct rb_root *root, const char *filename) 993 { 994 struct source_line *src_line; 995 struct rb_node *node; 996 997 printf("\nSorted summary for file %s\n", filename); 998 printf("----------------------------------------------\n\n"); 999 1000 if (RB_EMPTY_ROOT(root)) { 1001 printf(" Nothing higher than %1.1f%%\n", MIN_GREEN); 1002 return; 1003 } 1004 1005 node = rb_first(root); 1006 while (node) { 1007 double percent; 1008 const char *color; 1009 char *path; 1010 1011 src_line = rb_entry(node, struct source_line, node); 1012 percent = src_line->percent_sum; 1013 color = get_percent_color(percent); 1014 path = src_line->path; 1015 1016 color_fprintf(stdout, color, " %7.2f %s", percent, path); 1017 node = rb_next(node); 1018 } 1019 } 1020 1021 static void symbol__annotate_hits(struct symbol *sym, int evidx) 1022 { 1023 struct annotation *notes = symbol__annotation(sym); 1024 struct sym_hist *h = annotation__histogram(notes, evidx); 1025 u64 len = symbol__size(sym), offset; 1026 1027 for (offset = 0; offset < len; ++offset) 1028 if (h->addr[offset] != 0) 1029 printf("%*" PRIx64 ": %" PRIu64 "\n", BITS_PER_LONG / 2, 1030 sym->start + offset, h->addr[offset]); 1031 printf("%*s: %" PRIu64 "\n", BITS_PER_LONG / 2, "h->sum", h->sum); 1032 } 1033 1034 int symbol__annotate_printf(struct symbol *sym, struct map *map, int evidx, 1035 bool full_paths, int min_pcnt, int max_lines, 1036 int context) 1037 { 1038 struct dso *dso = map->dso; 1039 char *filename; 1040 const char *d_filename; 1041 struct annotation *notes = symbol__annotation(sym); 1042 struct disasm_line *pos, *queue = NULL; 1043 u64 start = map__rip_2objdump(map, sym->start); 1044 int printed = 2, queue_len = 0; 1045 int more = 0; 1046 u64 len; 1047 1048 filename = strdup(dso->long_name); 1049 if (!filename) 1050 return -ENOMEM; 1051 1052 if (full_paths) 1053 d_filename = filename; 1054 else 1055 d_filename = basename(filename); 1056 1057 len = symbol__size(sym); 1058 1059 printf(" Percent | Source code & Disassembly of %s\n", d_filename); 1060 printf("------------------------------------------------\n"); 1061 1062 if (verbose) 1063 symbol__annotate_hits(sym, evidx); 1064 1065 list_for_each_entry(pos, ¬es->src->source, node) { 1066 if (context && queue == NULL) { 1067 queue = pos; 1068 queue_len = 0; 1069 } 1070 1071 switch (disasm_line__print(pos, sym, start, evidx, len, 1072 min_pcnt, printed, max_lines, 1073 queue)) { 1074 case 0: 1075 ++printed; 1076 if (context) { 1077 printed += queue_len; 1078 queue = NULL; 1079 queue_len = 0; 1080 } 1081 break; 1082 case 1: 1083 /* filtered by max_lines */ 1084 ++more; 1085 break; 1086 case -1: 1087 default: 1088 /* 1089 * Filtered by min_pcnt or non IP lines when 1090 * context != 0 1091 */ 1092 if (!context) 1093 break; 1094 if (queue_len == context) 1095 queue = list_entry(queue->node.next, typeof(*queue), node); 1096 else 1097 ++queue_len; 1098 break; 1099 } 1100 } 1101 1102 free(filename); 1103 1104 return more; 1105 } 1106 1107 void symbol__annotate_zero_histogram(struct symbol *sym, int evidx) 1108 { 1109 struct annotation *notes = symbol__annotation(sym); 1110 struct sym_hist *h = annotation__histogram(notes, evidx); 1111 1112 memset(h, 0, notes->src->sizeof_sym_hist); 1113 } 1114 1115 void symbol__annotate_decay_histogram(struct symbol *sym, int evidx) 1116 { 1117 struct annotation *notes = symbol__annotation(sym); 1118 struct sym_hist *h = annotation__histogram(notes, evidx); 1119 int len = symbol__size(sym), offset; 1120 1121 h->sum = 0; 1122 for (offset = 0; offset < len; ++offset) { 1123 h->addr[offset] = h->addr[offset] * 7 / 8; 1124 h->sum += h->addr[offset]; 1125 } 1126 } 1127 1128 void disasm__purge(struct list_head *head) 1129 { 1130 struct disasm_line *pos, *n; 1131 1132 list_for_each_entry_safe(pos, n, head, node) { 1133 list_del(&pos->node); 1134 disasm_line__free(pos); 1135 } 1136 } 1137 1138 static size_t disasm_line__fprintf(struct disasm_line *dl, FILE *fp) 1139 { 1140 size_t printed; 1141 1142 if (dl->offset == -1) 1143 return fprintf(fp, "%s\n", dl->line); 1144 1145 printed = fprintf(fp, "%#" PRIx64 " %s", dl->offset, dl->name); 1146 1147 if (dl->ops.raw[0] != '\0') { 1148 printed += fprintf(fp, "%.*s %s\n", 6 - (int)printed, " ", 1149 dl->ops.raw); 1150 } 1151 1152 return printed + fprintf(fp, "\n"); 1153 } 1154 1155 size_t disasm__fprintf(struct list_head *head, FILE *fp) 1156 { 1157 struct disasm_line *pos; 1158 size_t printed = 0; 1159 1160 list_for_each_entry(pos, head, node) 1161 printed += disasm_line__fprintf(pos, fp); 1162 1163 return printed; 1164 } 1165 1166 int symbol__tty_annotate(struct symbol *sym, struct map *map, int evidx, 1167 bool print_lines, bool full_paths, int min_pcnt, 1168 int max_lines) 1169 { 1170 struct dso *dso = map->dso; 1171 const char *filename = dso->long_name; 1172 struct rb_root source_line = RB_ROOT; 1173 u64 len; 1174 1175 if (symbol__annotate(sym, map, 0) < 0) 1176 return -1; 1177 1178 len = symbol__size(sym); 1179 1180 if (print_lines) { 1181 symbol__get_source_line(sym, map, evidx, &source_line, 1182 len, filename); 1183 print_summary(&source_line, filename); 1184 } 1185 1186 symbol__annotate_printf(sym, map, evidx, full_paths, 1187 min_pcnt, max_lines, 0); 1188 if (print_lines) 1189 symbol__free_source_line(sym, len); 1190 1191 disasm__purge(&symbol__annotation(sym)->src->source); 1192 1193 return 0; 1194 } 1195