tools/perf/util/annotate.c

   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 "ui/ui.h"
  12 #include "sort.h"
  13 #include "build-id.h"
  14 #include "color.h"
  15 #include "cache.h"
  16 #include "symbol.h"
  17 #include "debug.h"
  18 #include "annotate.h"
  19 #include "evsel.h"
  20 #include "block-range.h"
  21 #include <regex.h>
  22 #include <pthread.h>
  23 #include <linux/bitops.h>
  24
  25 const char      *disassembler_style;
  26 const char      *objdump_path;
  27 static regex_t   file_lineno;
  28
  29 static struct ins *ins__find(const char *name);
  30 static int disasm_line__parse(char *line, char **namep, char **rawp);
  31
  32 static void ins__delete(struct ins_operands *ops)
  33 {
  34         if (ops == NULL)
  35                 return;
  36         zfree(&ops->source.raw);
  37         zfree(&ops->source.name);
  38         zfree(&ops->target.raw);
  39         zfree(&ops->target.name);
  40 }
  41
  42 static int ins__raw_scnprintf(struct ins *ins, char *bf, size_t size,
  43                               struct ins_operands *ops)
  44 {
  45         return scnprintf(bf, size, "%-6.6s %s", ins->name, ops->raw);
  46 }
  47
  48 int ins__scnprintf(struct ins *ins, char *bf, size_t size,
  49                   struct ins_operands *ops)
  50 {
  51         if (ins->ops->scnprintf)
  52                 return ins->ops->scnprintf(ins, bf, size, ops);
  53
  54         return ins__raw_scnprintf(ins, bf, size, ops);
  55 }
  56
  57 static int call__parse(struct ins_operands *ops, struct map *map)
  58 {
  59         char *endptr, *tok, *name;
  60
  61         ops->target.addr = strtoull(ops->raw, &endptr, 16);
  62
  63         name = strchr(endptr, '<');
  64         if (name == NULL)
  65                 goto indirect_call;
  66
  67         name++;
  68
  69 #ifdef __arm__
  70         if (strchr(name, '+'))
  71                 return -1;
  72 #endif
  73
  74         tok = strchr(name, '>');
  75         if (tok == NULL)
  76                 return -1;
  77
  78         *tok = '\0';
  79         ops->target.name = strdup(name);
  80         *tok = '>';
  81
  82         return ops->target.name == NULL ? -1 : 0;
  83
  84 indirect_call:
  85         tok = strchr(endptr, '*');
  86         if (tok == NULL) {
  87                 struct symbol *sym = map__find_symbol(map, map->map_ip(map, ops->target.addr));
  88                 if (sym != NULL)
  89                         ops->target.name = strdup(sym->name);
  90                 else
  91                         ops->target.addr = 0;
  92                 return 0;
  93         }
  94
  95         ops->target.addr = strtoull(tok + 1, NULL, 16);
  96         return 0;
  97 }
  98
  99 static int call__scnprintf(struct ins *ins, char *bf, size_t size,
 100                            struct ins_operands *ops)
 101 {
 102         if (ops->target.name)
 103                 return scnprintf(bf, size, "%-6.6s %s", ins->name, ops->target.name);
 104
 105         if (ops->target.addr == 0)
 106                 return ins__raw_scnprintf(ins, bf, size, ops);
 107
 108         return scnprintf(bf, size, "%-6.6s *%" PRIx64, ins->name, ops->target.addr);
 109 }
 110
 111 static struct ins_ops call_ops = {
 112         .parse     = call__parse,
 113         .scnprintf = call__scnprintf,
 114 };
 115
 116 bool ins__is_call(const struct ins *ins)
 117 {
 118         return ins->ops == &call_ops;
 119 }
 120
 121 static int jump__parse(struct ins_operands *ops, struct map *map __maybe_unused)
 122 {
 123         const char *s = strchr(ops->raw, '+');
 124
 125         ops->target.addr = strtoull(ops->raw, NULL, 16);
 126
 127         if (s++ != NULL)
 128                 ops->target.offset = strtoull(s, NULL, 16);
 129         else
 130                 ops->target.offset = UINT64_MAX;
 131
 132         return 0;
 133 }
 134
 135 static int jump__scnprintf(struct ins *ins, char *bf, size_t size,
 136                            struct ins_operands *ops)
 137 {
 138         return scnprintf(bf, size, "%-6.6s %" PRIx64, ins->name, ops->target.offset);
 139 }
 140
 141 static struct ins_ops jump_ops = {
 142         .parse     = jump__parse,
 143         .scnprintf = jump__scnprintf,
 144 };
 145
 146 bool ins__is_jump(const struct ins *ins)
 147 {
 148         return ins->ops == &jump_ops;
 149 }
 150
 151 static int comment__symbol(char *raw, char *comment, u64 *addrp, char **namep)
 152 {
 153         char *endptr, *name, *t;
 154
 155         if (strstr(raw, "(%rip)") == NULL)
 156                 return 0;
 157
 158         *addrp = strtoull(comment, &endptr, 16);
 159         name = strchr(endptr, '<');
 160         if (name == NULL)
 161                 return -1;
 162
 163         name++;
 164
 165         t = strchr(name, '>');
 166         if (t == NULL)
 167                 return 0;
 168
 169         *t = '\0';
 170         *namep = strdup(name);
 171         *t = '>';
 172
 173         return 0;
 174 }
 175
 176 static int lock__parse(struct ins_operands *ops, struct map *map)
 177 {
 178         char *name;
 179
 180         ops->locked.ops = zalloc(sizeof(*ops->locked.ops));
 181         if (ops->locked.ops == NULL)
 182                 return 0;
 183
 184         if (disasm_line__parse(ops->raw, &name, &ops->locked.ops->raw) < 0)
 185                 goto out_free_ops;
 186
 187         ops->locked.ins = ins__find(name);
 188         free(name);
 189
 190         if (ops->locked.ins == NULL)
 191                 goto out_free_ops;
 192
 193         if (!ops->locked.ins->ops)
 194                 return 0;
 195
 196         if (ops->locked.ins->ops->parse &&
 197             ops->locked.ins->ops->parse(ops->locked.ops, map) < 0)
 198                 goto out_free_ops;
 199
 200         return 0;
 201
 202 out_free_ops:
 203         zfree(&ops->locked.ops);
 204         return 0;
 205 }
 206
 207 static int lock__scnprintf(struct ins *ins, char *bf, size_t size,
 208                            struct ins_operands *ops)
 209 {
 210         int printed;
 211
 212         if (ops->locked.ins == NULL)
 213                 return ins__raw_scnprintf(ins, bf, size, ops);
 214
 215         printed = scnprintf(bf, size, "%-6.6s ", ins->name);
 216         return printed + ins__scnprintf(ops->locked.ins, bf + printed,
 217                                         size - printed, ops->locked.ops);
 218 }
 219
 220 static void lock__delete(struct ins_operands *ops)
 221 {
 222         struct ins *ins = ops->locked.ins;
 223
 224         if (ins && ins->ops->free)
 225                 ins->ops->free(ops->locked.ops);
 226         else
 227                 ins__delete(ops->locked.ops);
 228
 229         zfree(&ops->locked.ops);
 230         zfree(&ops->target.raw);
 231         zfree(&ops->target.name);
 232 }
 233
 234 static struct ins_ops lock_ops = {
 235         .free      = lock__delete,
 236         .parse     = lock__parse,
 237         .scnprintf = lock__scnprintf,
 238 };
 239
 240 static int mov__parse(struct ins_operands *ops, struct map *map __maybe_unused)
 241 {
 242         char *s = strchr(ops->raw, ','), *target, *comment, prev;
 243
 244         if (s == NULL)
 245                 return -1;
 246
 247         *s = '\0';
 248         ops->source.raw = strdup(ops->raw);
 249         *s = ',';
 250
 251         if (ops->source.raw == NULL)
 252                 return -1;
 253
 254         target = ++s;
 255 #ifdef __arm__
 256         comment = strchr(s, ';');
 257 #else
 258         comment = strchr(s, '#');
 259 #endif
 260
 261         if (comment != NULL)
 262                 s = comment - 1;
 263         else
 264                 s = strchr(s, '\0') - 1;
 265
 266         while (s > target && isspace(s[0]))
 267                 --s;
 268         s++;
 269         prev = *s;
 270         *s = '\0';
 271
 272         ops->target.raw = strdup(target);
 273         *s = prev;
 274
 275         if (ops->target.raw == NULL)
 276                 goto out_free_source;
 277
 278         if (comment == NULL)
 279                 return 0;
 280
 281         while (comment[0] != '\0' && isspace(comment[0]))
 282                 ++comment;
 283
 284         comment__symbol(ops->source.raw, comment, &ops->source.addr, &ops->source.name);
 285         comment__symbol(ops->target.raw, comment, &ops->target.addr, &ops->target.name);
 286
 287         return 0;
 288
 289 out_free_source:
 290         zfree(&ops->source.raw);
 291         return -1;
 292 }
 293
 294 static int mov__scnprintf(struct ins *ins, char *bf, size_t size,
 295                            struct ins_operands *ops)
 296 {
 297         return scnprintf(bf, size, "%-6.6s %s,%s", ins->name,
 298                          ops->source.name ?: ops->source.raw,
 299                          ops->target.name ?: ops->target.raw);
 300 }
 301
 302 static struct ins_ops mov_ops = {
 303         .parse     = mov__parse,
 304         .scnprintf = mov__scnprintf,
 305 };
 306
 307 static int dec__parse(struct ins_operands *ops, struct map *map __maybe_unused)
 308 {
 309         char *target, *comment, *s, prev;
 310
 311         target = s = ops->raw;
 312
 313         while (s[0] != '\0' && !isspace(s[0]))
 314                 ++s;
 315         prev = *s;
 316         *s = '\0';
 317
 318         ops->target.raw = strdup(target);
 319         *s = prev;
 320
 321         if (ops->target.raw == NULL)
 322                 return -1;
 323
 324         comment = strchr(s, '#');
 325         if (comment == NULL)
 326                 return 0;
 327
 328         while (comment[0] != '\0' && isspace(comment[0]))
 329                 ++comment;
 330
 331         comment__symbol(ops->target.raw, comment, &ops->target.addr, &ops->target.name);
 332
 333         return 0;
 334 }
 335
 336 static int dec__scnprintf(struct ins *ins, char *bf, size_t size,
 337                            struct ins_operands *ops)
 338 {
 339         return scnprintf(bf, size, "%-6.6s %s", ins->name,
 340                          ops->target.name ?: ops->target.raw);
 341 }
 342
 343 static struct ins_ops dec_ops = {
 344         .parse     = dec__parse,
 345         .scnprintf = dec__scnprintf,
 346 };
 347
 348 static int nop__scnprintf(struct ins *ins __maybe_unused, char *bf, size_t size,
 349                           struct ins_operands *ops __maybe_unused)
 350 {
 351         return scnprintf(bf, size, "%-6.6s", "nop");
 352 }
 353
 354 static struct ins_ops nop_ops = {
 355         .scnprintf = nop__scnprintf,
 356 };
 357
 358 static struct ins_ops ret_ops = {
 359         .scnprintf = ins__raw_scnprintf,
 360 };
 361
 362 bool ins__is_ret(const struct ins *ins)
 363 {
 364         return ins->ops == &ret_ops;
 365 }
 366
 367 static struct ins instructions[] = {
 368         { .name = "add",   .ops  = &mov_ops, },
 369         { .name = "addl",  .ops  = &mov_ops, },
 370         { .name = "addq",  .ops  = &mov_ops, },
 371         { .name = "addw",  .ops  = &mov_ops, },
 372         { .name = "and",   .ops  = &mov_ops, },
 373 #ifdef __arm__
 374         { .name = "b",     .ops  = &jump_ops, }, // might also be a call
 375         { .name = "bcc",   .ops  = &jump_ops, },
 376         { .name = "bcs",   .ops  = &jump_ops, },
 377         { .name = "beq",   .ops  = &jump_ops, },
 378         { .name = "bge",   .ops  = &jump_ops, },
 379         { .name = "bgt",   .ops  = &jump_ops, },
 380         { .name = "bhi",   .ops  = &jump_ops, },
 381         { .name = "bl",    .ops  = &call_ops, },
 382         { .name = "bls",   .ops  = &jump_ops, },
 383         { .name = "blt",   .ops  = &jump_ops, },
 384         { .name = "blx",   .ops  = &call_ops, },
 385         { .name = "bne",   .ops  = &jump_ops, },
 386 #endif
 387         { .name = "bts",   .ops  = &mov_ops, },
 388         { .name = "call",  .ops  = &call_ops, },
 389         { .name = "callq", .ops  = &call_ops, },
 390         { .name = "cmp",   .ops  = &mov_ops, },
 391         { .name = "cmpb",  .ops  = &mov_ops, },
 392         { .name = "cmpl",  .ops  = &mov_ops, },
 393         { .name = "cmpq",  .ops  = &mov_ops, },
 394         { .name = "cmpw",  .ops  = &mov_ops, },
 395         { .name = "cmpxch", .ops  = &mov_ops, },
 396         { .name = "dec",   .ops  = &dec_ops, },
 397         { .name = "decl",  .ops  = &dec_ops, },
 398         { .name = "imul",  .ops  = &mov_ops, },
 399         { .name = "inc",   .ops  = &dec_ops, },
 400         { .name = "incl",  .ops  = &dec_ops, },
 401         { .name = "ja",    .ops  = &jump_ops, },
 402         { .name = "jae",   .ops  = &jump_ops, },
 403         { .name = "jb",    .ops  = &jump_ops, },
 404         { .name = "jbe",   .ops  = &jump_ops, },
 405         { .name = "jc",    .ops  = &jump_ops, },
 406         { .name = "jcxz",  .ops  = &jump_ops, },
 407         { .name = "je",    .ops  = &jump_ops, },
 408         { .name = "jecxz", .ops  = &jump_ops, },
 409         { .name = "jg",    .ops  = &jump_ops, },
 410         { .name = "jge",   .ops  = &jump_ops, },
 411         { .name = "jl",    .ops  = &jump_ops, },
 412         { .name = "jle",   .ops  = &jump_ops, },
 413         { .name = "jmp",   .ops  = &jump_ops, },
 414         { .name = "jmpq",  .ops  = &jump_ops, },
 415         { .name = "jna",   .ops  = &jump_ops, },
 416         { .name = "jnae",  .ops  = &jump_ops, },
 417         { .name = "jnb",   .ops  = &jump_ops, },
 418         { .name = "jnbe",  .ops  = &jump_ops, },
 419         { .name = "jnc",   .ops  = &jump_ops, },
 420         { .name = "jne",   .ops  = &jump_ops, },
 421         { .name = "jng",   .ops  = &jump_ops, },
 422         { .name = "jnge",  .ops  = &jump_ops, },
 423         { .name = "jnl",   .ops  = &jump_ops, },
 424         { .name = "jnle",  .ops  = &jump_ops, },
 425         { .name = "jno",   .ops  = &jump_ops, },
 426         { .name = "jnp",   .ops  = &jump_ops, },
 427         { .name = "jns",   .ops  = &jump_ops, },
 428         { .name = "jnz",   .ops  = &jump_ops, },
 429         { .name = "jo",    .ops  = &jump_ops, },
 430         { .name = "jp",    .ops  = &jump_ops, },
 431         { .name = "jpe",   .ops  = &jump_ops, },
 432         { .name = "jpo",   .ops  = &jump_ops, },
 433         { .name = "jrcxz", .ops  = &jump_ops, },
 434         { .name = "js",    .ops  = &jump_ops, },
 435         { .name = "jz",    .ops  = &jump_ops, },
 436         { .name = "lea",   .ops  = &mov_ops, },
 437         { .name = "lock",  .ops  = &lock_ops, },
 438         { .name = "mov",   .ops  = &mov_ops, },
 439         { .name = "movb",  .ops  = &mov_ops, },
 440         { .name = "movdqa",.ops  = &mov_ops, },
 441         { .name = "movl",  .ops  = &mov_ops, },
 442         { .name = "movq",  .ops  = &mov_ops, },
 443         { .name = "movslq", .ops  = &mov_ops, },
 444         { .name = "movzbl", .ops  = &mov_ops, },
 445         { .name = "movzwl", .ops  = &mov_ops, },
 446         { .name = "nop",   .ops  = &nop_ops, },
 447         { .name = "nopl",  .ops  = &nop_ops, },
 448         { .name = "nopw",  .ops  = &nop_ops, },
 449         { .name = "or",    .ops  = &mov_ops, },
 450         { .name = "orl",   .ops  = &mov_ops, },
 451         { .name = "test",  .ops  = &mov_ops, },
 452         { .name = "testb", .ops  = &mov_ops, },
 453         { .name = "testl", .ops  = &mov_ops, },
 454         { .name = "xadd",  .ops  = &mov_ops, },
 455         { .name = "xbeginl", .ops  = &jump_ops, },
 456         { .name = "xbeginq", .ops  = &jump_ops, },
 457         { .name = "retq",  .ops  = &ret_ops, },
 458 };
 459
 460 static int ins__key_cmp(const void *name, const void *insp)
 461 {
 462         const struct ins *ins = insp;
 463
 464         return strcmp(name, ins->name);
 465 }
 466
 467 static int ins__cmp(const void *a, const void *b)
 468 {
 469         const struct ins *ia = a;
 470         const struct ins *ib = b;
 471
 472         return strcmp(ia->name, ib->name);
 473 }
 474
 475 static void ins__sort(void)
 476 {
 477         const int nmemb = ARRAY_SIZE(instructions);
 478
 479         qsort(instructions, nmemb, sizeof(struct ins), ins__cmp);
 480 }
 481
 482 static struct ins *ins__find(const char *name)
 483 {
 484         const int nmemb = ARRAY_SIZE(instructions);
 485         static bool sorted;
 486
 487         if (!sorted) {
 488                 ins__sort();
 489                 sorted = true;
 490         }
 491
 492         return bsearch(name, instructions, nmemb, sizeof(struct ins), ins__key_cmp);
 493 }
 494
 495 int symbol__alloc_hist(struct symbol *sym)
 496 {
 497         struct annotation *notes = symbol__annotation(sym);
 498         size_t size = symbol__size(sym);
 499         size_t sizeof_sym_hist;
 500
 501         /*
 502          * Add buffer of one element for zero length symbol.
 503          * When sample is taken from first instruction of
 504          * zero length symbol, perf still resolves it and
 505          * shows symbol name in perf report and allows to
 506          * annotate it.
 507          */
 508         if (size == 0)
 509                 size = 1;
 510
 511         /* Check for overflow when calculating sizeof_sym_hist */
 512         if (size > (SIZE_MAX - sizeof(struct sym_hist)) / sizeof(u64))
 513                 return -1;
 514
 515         sizeof_sym_hist = (sizeof(struct sym_hist) + size * sizeof(u64));
 516
 517         /* Check for overflow in zalloc argument */
 518         if (sizeof_sym_hist > (SIZE_MAX - sizeof(*notes->src))
 519                                 / symbol_conf.nr_events)
 520                 return -1;
 521
 522         notes->src = zalloc(sizeof(*notes->src) + symbol_conf.nr_events * sizeof_sym_hist);
 523         if (notes->src == NULL)
 524                 return -1;
 525         notes->src->sizeof_sym_hist = sizeof_sym_hist;
 526         notes->src->nr_histograms   = symbol_conf.nr_events;
 527         INIT_LIST_HEAD(&notes->src->source);
 528         return 0;
 529 }
 530
 531 /* The cycles histogram is lazily allocated. */
 532 static int symbol__alloc_hist_cycles(struct symbol *sym)
 533 {
 534         struct annotation *notes = symbol__annotation(sym);
 535         const size_t size = symbol__size(sym);
 536
 537         notes->src->cycles_hist = calloc(size, sizeof(struct cyc_hist));
 538         if (notes->src->cycles_hist == NULL)
 539                 return -1;
 540         return 0;
 541 }
 542
 543 void symbol__annotate_zero_histograms(struct symbol *sym)
 544 {
 545         struct annotation *notes = symbol__annotation(sym);
 546
 547         pthread_mutex_lock(&notes->lock);
 548         if (notes->src != NULL) {
 549                 memset(notes->src->histograms, 0,
 550                        notes->src->nr_histograms * notes->src->sizeof_sym_hist);
 551                 if (notes->src->cycles_hist)
 552                         memset(notes->src->cycles_hist, 0,
 553                                 symbol__size(sym) * sizeof(struct cyc_hist));
 554         }
 555         pthread_mutex_unlock(&notes->lock);
 556 }
 557
 558 static int __symbol__account_cycles(struct annotation *notes,
 559                                     u64 start,
 560                                     unsigned offset, unsigned cycles,
 561                                     unsigned have_start)
 562 {
 563         struct cyc_hist *ch;
 564
 565         ch = notes->src->cycles_hist;
 566         /*
 567          * For now we can only account one basic block per
 568          * final jump. But multiple could be overlapping.
 569          * Always account the longest one. So when
 570          * a shorter one has been already seen throw it away.
 571          *
 572          * We separately always account the full cycles.
 573          */
 574         ch[offset].num_aggr++;
 575         ch[offset].cycles_aggr += cycles;
 576
 577         if (!have_start && ch[offset].have_start)
 578                 return 0;
 579         if (ch[offset].num) {
 580                 if (have_start && (!ch[offset].have_start ||
 581                                    ch[offset].start > start)) {
 582                         ch[offset].have_start = 0;
 583                         ch[offset].cycles = 0;
 584                         ch[offset].num = 0;
 585                         if (ch[offset].reset < 0xffff)
 586                                 ch[offset].reset++;
 587                 } else if (have_start &&
 588                            ch[offset].start < start)
 589                         return 0;
 590         }
 591         ch[offset].have_start = have_start;
 592         ch[offset].start = start;
 593         ch[offset].cycles += cycles;
 594         ch[offset].num++;
 595         return 0;
 596 }
 597
 598 static int __symbol__inc_addr_samples(struct symbol *sym, struct map *map,
 599                                       struct annotation *notes, int evidx, u64 addr)
 600 {
 601         unsigned offset;
 602         struct sym_hist *h;
 603
 604         pr_debug3("%s: addr=%#" PRIx64 "\n", __func__, map->unmap_ip(map, addr));
 605
 606         if ((addr < sym->start || addr >= sym->end) &&
 607             (addr != sym->end || sym->start != sym->end)) {
 608                 pr_debug("%s(%d): ERANGE! sym->name=%s, start=%#" PRIx64 ", addr=%#" PRIx64 ", end=%#" PRIx64 "\n",
 609                        __func__, __LINE__, sym->name, sym->start, addr, sym->end);
 610                 return -ERANGE;
 611         }
 612
 613         offset = addr - sym->start;
 614         h = annotation__histogram(notes, evidx);
 615         h->sum++;
 616         h->addr[offset]++;
 617
 618         pr_debug3("%#" PRIx64 " %s: period++ [addr: %#" PRIx64 ", %#" PRIx64
 619                   ", evidx=%d] => %" PRIu64 "\n", sym->start, sym->name,
 620                   addr, addr - sym->start, evidx, h->addr[offset]);
 621         return 0;
 622 }
 623
 624 static struct annotation *symbol__get_annotation(struct symbol *sym, bool cycles)
 625 {
 626         struct annotation *notes = symbol__annotation(sym);
 627
 628         if (notes->src == NULL) {
 629                 if (symbol__alloc_hist(sym) < 0)
 630                         return NULL;
 631         }
 632         if (!notes->src->cycles_hist && cycles) {
 633                 if (symbol__alloc_hist_cycles(sym) < 0)
 634                         return NULL;
 635         }
 636         return notes;
 637 }
 638
 639 static int symbol__inc_addr_samples(struct symbol *sym, struct map *map,
 640                                     int evidx, u64 addr)
 641 {
 642         struct annotation *notes;
 643
 644         if (sym == NULL)
 645                 return 0;
 646         notes = symbol__get_annotation(sym, false);
 647         if (notes == NULL)
 648                 return -ENOMEM;
 649         return __symbol__inc_addr_samples(sym, map, notes, evidx, addr);
 650 }
 651
 652 static int symbol__account_cycles(u64 addr, u64 start,
 653                                   struct symbol *sym, unsigned cycles)
 654 {
 655         struct annotation *notes;
 656         unsigned offset;
 657
 658         if (sym == NULL)
 659                 return 0;
 660         notes = symbol__get_annotation(sym, true);
 661         if (notes == NULL)
 662                 return -ENOMEM;
 663         if (addr < sym->start || addr >= sym->end)
 664                 return -ERANGE;
 665
 666         if (start) {
 667                 if (start < sym->start || start >= sym->end)
 668                         return -ERANGE;
 669                 if (start >= addr)
 670                         start = 0;
 671         }
 672         offset = addr - sym->start;
 673         return __symbol__account_cycles(notes,
 674                                         start ? start - sym->start : 0,
 675                                         offset, cycles,
 676                                         !!start);
 677 }
 678
 679 int addr_map_symbol__account_cycles(struct addr_map_symbol *ams,
 680                                     struct addr_map_symbol *start,
 681                                     unsigned cycles)
 682 {
 683         u64 saddr = 0;
 684         int err;
 685
 686         if (!cycles)
 687                 return 0;
 688
 689         /*
 690          * Only set start when IPC can be computed. We can only
 691          * compute it when the basic block is completely in a single
 692          * function.
 693          * Special case the case when the jump is elsewhere, but
 694          * it starts on the function start.
 695          */
 696         if (start &&
 697                 (start->sym == ams->sym ||
 698                  (ams->sym &&
 699                    start->addr == ams->sym->start + ams->map->start)))
 700                 saddr = start->al_addr;
 701         if (saddr == 0)
 702                 pr_debug2("BB with bad start: addr %"PRIx64" start %"PRIx64" sym %"PRIx64" saddr %"PRIx64"\n",
 703                         ams->addr,
 704                         start ? start->addr : 0,
 705                         ams->sym ? ams->sym->start + ams->map->start : 0,
 706                         saddr);
 707         err = symbol__account_cycles(ams->al_addr, saddr, ams->sym, cycles);
 708         if (err)
 709                 pr_debug2("account_cycles failed %d\n", err);
 710         return err;
 711 }
 712
 713 int addr_map_symbol__inc_samples(struct addr_map_symbol *ams, int evidx)
 714 {
 715         return symbol__inc_addr_samples(ams->sym, ams->map, evidx, ams->al_addr);
 716 }
 717
 718 int hist_entry__inc_addr_samples(struct hist_entry *he, int evidx, u64 ip)
 719 {
 720         return symbol__inc_addr_samples(he->ms.sym, he->ms.map, evidx, ip);
 721 }
 722
 723 static void disasm_line__init_ins(struct disasm_line *dl, struct map *map)
 724 {
 725         dl->ins = ins__find(dl->name);
 726
 727         if (dl->ins == NULL)
 728                 return;
 729
 730         if (!dl->ins->ops)
 731                 return;
 732
 733         if (dl->ins->ops->parse && dl->ins->ops->parse(&dl->ops, map) < 0)
 734                 dl->ins = NULL;
 735 }
 736
 737 static int disasm_line__parse(char *line, char **namep, char **rawp)
 738 {
 739         char *name = line, tmp;
 740
 741         while (isspace(name[0]))
 742                 ++name;
 743
 744         if (name[0] == '\0')
 745                 return -1;
 746
 747         *rawp = name + 1;
 748
 749         while ((*rawp)[0] != '\0' && !isspace((*rawp)[0]))
 750                 ++*rawp;
 751
 752         tmp = (*rawp)[0];
 753         (*rawp)[0] = '\0';
 754         *namep = strdup(name);
 755
 756         if (*namep == NULL)
 757                 goto out_free_name;
 758
 759         (*rawp)[0] = tmp;
 760
 761         if ((*rawp)[0] != '\0') {
 762                 (*rawp)++;
 763                 while (isspace((*rawp)[0]))
 764                         ++(*rawp);
 765         }
 766
 767         return 0;
 768
 769 out_free_name:
 770         zfree(namep);
 771         return -1;
 772 }
 773
 774 static struct disasm_line *disasm_line__new(s64 offset, char *line,
 775                                             size_t privsize, int line_nr,
 776                                             struct map *map)
 777 {
 778         struct disasm_line *dl = zalloc(sizeof(*dl) + privsize);
 779
 780         if (dl != NULL) {
 781                 dl->offset = offset;
 782                 dl->line = strdup(line);
 783                 dl->line_nr = line_nr;
 784                 if (dl->line == NULL)
 785                         goto out_delete;
 786
 787                 if (offset != -1) {
 788                         if (disasm_line__parse(dl->line, &dl->name, &dl->ops.raw) < 0)
 789                                 goto out_free_line;
 790
 791                         disasm_line__init_ins(dl, map);
 792                 }
 793         }
 794
 795         return dl;
 796
 797 out_free_line:
 798         zfree(&dl->line);
 799 out_delete:
 800         free(dl);
 801         return NULL;
 802 }
 803
 804 void disasm_line__free(struct disasm_line *dl)
 805 {
 806         zfree(&dl->line);
 807         zfree(&dl->name);
 808         if (dl->ins && dl->ins->ops->free)
 809                 dl->ins->ops->free(&dl->ops);
 810         else
 811                 ins__delete(&dl->ops);
 812         free(dl);
 813 }
 814
 815 int disasm_line__scnprintf(struct disasm_line *dl, char *bf, size_t size, bool raw)
 816 {
 817         if (raw || !dl->ins)
 818                 return scnprintf(bf, size, "%-6.6s %s", dl->name, dl->ops.raw);
 819
 820         return ins__scnprintf(dl->ins, bf, size, &dl->ops);
 821 }
 822
 823 static void disasm__add(struct list_head *head, struct disasm_line *line)
 824 {
 825         list_add_tail(&line->node, head);
 826 }
 827
 828 struct disasm_line *disasm__get_next_ip_line(struct list_head *head, struct disasm_line *pos)
 829 {
 830         list_for_each_entry_continue(pos, head, node)
 831                 if (pos->offset >= 0)
 832                         return pos;
 833
 834         return NULL;
 835 }
 836
 837 double disasm__calc_percent(struct annotation *notes, int evidx, s64 offset,
 838                             s64 end, const char **path, u64 *nr_samples)
 839 {
 840         struct source_line *src_line = notes->src->lines;
 841         double percent = 0.0;
 842         *nr_samples = 0;
 843
 844         if (src_line) {
 845                 size_t sizeof_src_line = sizeof(*src_line) +
 846                                 sizeof(src_line->samples) * (src_line->nr_pcnt - 1);
 847
 848                 while (offset < end) {
 849                         src_line = (void *)notes->src->lines +
 850                                         (sizeof_src_line * offset);
 851
 852                         if (*path == NULL)
 853                                 *path = src_line->path;
 854
 855                         percent += src_line->samples[evidx].percent;
 856                         *nr_samples += src_line->samples[evidx].nr;
 857                         offset++;
 858                 }
 859         } else {
 860                 struct sym_hist *h = annotation__histogram(notes, evidx);
 861                 unsigned int hits = 0;
 862
 863                 while (offset < end)
 864                         hits += h->addr[offset++];
 865
 866                 if (h->sum) {
 867                         *nr_samples = hits;
 868                         percent = 100.0 * hits / h->sum;
 869                 }
 870         }
 871
 872         return percent;
 873 }
 874
 875 static const char *annotate__address_color(struct block_range *br)
 876 {
 877         double cov = block_range__coverage(br);
 878
 879         if (cov >= 0) {
 880                 /* mark red for >75% coverage */
 881                 if (cov > 0.75)
 882                         return PERF_COLOR_RED;
 883
 884                 /* mark dull for <1% coverage */
 885                 if (cov < 0.01)
 886                         return PERF_COLOR_NORMAL;
 887         }
 888
 889         return PERF_COLOR_MAGENTA;
 890 }
 891
 892 static const char *annotate__asm_color(struct block_range *br)
 893 {
 894         double cov = block_range__coverage(br);
 895
 896         if (cov >= 0) {
 897                 /* mark dull for <1% coverage */
 898                 if (cov < 0.01)
 899                         return PERF_COLOR_NORMAL;
 900         }
 901
 902         return PERF_COLOR_BLUE;
 903 }
 904
 905 static void annotate__branch_printf(struct block_range *br, u64 addr)
 906 {
 907         bool emit_comment = true;
 908
 909         if (!br)
 910                 return;
 911
 912 #if 1
 913         if (br->is_target && br->start == addr) {
 914                 struct block_range *branch = br;
 915                 double p;
 916
 917                 /*
 918                  * Find matching branch to our target.
 919                  */
 920                 while (!branch->is_branch)
 921                         branch = block_range__next(branch);
 922
 923                 p = 100 *(double)br->entry / branch->coverage;
 924
 925                 if (p > 0.1) {
 926                         if (emit_comment) {
 927                                 emit_comment = false;
 928                                 printf("\t#");
 929                         }
 930
 931                         /*
 932                          * The percentage of coverage joined at this target in relation
 933                          * to the next branch.
 934                          */
 935                         printf(" +%.2f%%", p);
 936                 }
 937         }
 938 #endif
 939         if (br->is_branch && br->end == addr) {
 940                 double p = 100*(double)br->taken / br->coverage;
 941
 942                 if (p > 0.1) {
 943                         if (emit_comment) {
 944                                 emit_comment = false;
 945                                 printf("\t#");
 946                         }
 947
 948                         /*
 949                          * The percentage of coverage leaving at this branch, and
 950                          * its prediction ratio.
 951                          */
 952                         printf(" -%.2f%% (p:%.2f%%)", p, 100*(double)br->pred  / br->taken);
 953                 }
 954         }
 955 }
 956
 957
 958 static int disasm_line__print(struct disasm_line *dl, struct symbol *sym, u64 start,
 959                       struct perf_evsel *evsel, u64 len, int min_pcnt, int printed,
 960                       int max_lines, struct disasm_line *queue)
 961 {
 962         static const char *prev_line;
 963         static const char *prev_color;
 964
 965         if (dl->offset != -1) {
 966                 const char *path = NULL;
 967                 u64 nr_samples;
 968                 double percent, max_percent = 0.0;
 969                 double *ppercents = &percent;
 970                 u64 *psamples = &nr_samples;
 971                 int i, nr_percent = 1;
 972                 const char *color;
 973                 struct annotation *notes = symbol__annotation(sym);
 974                 s64 offset = dl->offset;
 975                 const u64 addr = start + offset;
 976                 struct disasm_line *next;
 977                 struct block_range *br;
 978
 979                 next = disasm__get_next_ip_line(&notes->src->source, dl);
 980
 981                 if (perf_evsel__is_group_event(evsel)) {
 982                         nr_percent = evsel->nr_members;
 983                         ppercents = calloc(nr_percent, sizeof(double));
 984                         psamples = calloc(nr_percent, sizeof(u64));
 985                         if (ppercents == NULL || psamples == NULL) {
 986                                 return -1;
 987                         }
 988                 }
 989
 990                 for (i = 0; i < nr_percent; i++) {
 991                         percent = disasm__calc_percent(notes,
 992                                         notes->src->lines ? i : evsel->idx + i,
 993                                         offset,
 994                                         next ? next->offset : (s64) len,
 995                                         &path, &nr_samples);
 996
 997                         ppercents[i] = percent;
 998                         psamples[i] = nr_samples;
 999                         if (percent > max_percent)
1000                                 max_percent = percent;
1001                 }
1002
1003                 if (max_percent < min_pcnt)
1004                         return -1;
1005
1006                 if (max_lines && printed >= max_lines)
1007                         return 1;
1008
1009                 if (queue != NULL) {
1010                         list_for_each_entry_from(queue, &notes->src->source, node) {
1011                                 if (queue == dl)
1012                                         break;
1013                                 disasm_line__print(queue, sym, start, evsel, len,
1014                                                     0, 0, 1, NULL);
1015                         }
1016                 }
1017
1018                 color = get_percent_color(max_percent);
1019
1020                 /*
1021                  * Also color the filename and line if needed, with
1022                  * the same color than the percentage. Don't print it
1023                  * twice for close colored addr with the same filename:line
1024                  */
1025                 if (path) {
1026                         if (!prev_line || strcmp(prev_line, path)
1027                                        || color != prev_color) {
1028                                 color_fprintf(stdout, color, " %s", path);
1029                                 prev_line = path;
1030                                 prev_color = color;
1031                         }
1032                 }
1033
1034                 for (i = 0; i < nr_percent; i++) {
1035                         percent = ppercents[i];
1036                         nr_samples = psamples[i];
1037                         color = get_percent_color(percent);
1038
1039                         if (symbol_conf.show_total_period)
1040                                 color_fprintf(stdout, color, " %7" PRIu64,
1041                                               nr_samples);
1042                         else
1043                                 color_fprintf(stdout, color, " %7.2f", percent);
1044                 }
1045
1046                 printf(" :      ");
1047
1048                 br = block_range__find(addr);
1049                 color_fprintf(stdout, annotate__address_color(br), "  %" PRIx64 ":", addr);
1050                 color_fprintf(stdout, annotate__asm_color(br), "%s", dl->line);
1051                 annotate__branch_printf(br, addr);
1052                 printf("\n");
1053
1054                 if (ppercents != &percent)
1055                         free(ppercents);
1056
1057                 if (psamples != &nr_samples)
1058                         free(psamples);
1059
1060         } else if (max_lines && printed >= max_lines)
1061                 return 1;
1062         else {
1063                 int width = 8;
1064
1065                 if (queue)
1066                         return -1;
1067
1068                 if (perf_evsel__is_group_event(evsel))
1069                         width *= evsel->nr_members;
1070
1071                 if (!*dl->line)
1072                         printf(" %*s:\n", width, " ");
1073                 else
1074                         printf(" %*s:   %s\n", width, " ", dl->line);
1075         }
1076
1077         return 0;
1078 }
1079
1080 /*
1081  * symbol__parse_objdump_line() parses objdump output (with -d --no-show-raw)
1082  * which looks like following
1083  *
1084  *  0000000000415500 <_init>:
1085  *    415500:       sub    $0x8,%rsp
1086  *    415504:       mov    0x2f5ad5(%rip),%rax        # 70afe0 <_DYNAMIC+0x2f8>
1087  *    41550b:       test   %rax,%rax
1088  *    41550e:       je     415515 <_init+0x15>
1089  *    415510:       callq  416e70 <__gmon_start__@plt>
1090  *    415515:       add    $0x8,%rsp
1091  *    415519:       retq
1092  *
1093  * it will be parsed and saved into struct disasm_line as
1094  *  <offset>       <name>  <ops.raw>
1095  *
1096  * The offset will be a relative offset from the start of the symbol and -1
1097  * means that it's not a disassembly line so should be treated differently.
1098  * The ops.raw part will be parsed further according to type of the instruction.
1099  */
1100 static int symbol__parse_objdump_line(struct symbol *sym, struct map *map,
1101                                       FILE *file, size_t privsize,
1102                                       int *line_nr)
1103 {
1104         struct annotation *notes = symbol__annotation(sym);
1105         struct disasm_line *dl;
1106         char *line = NULL, *parsed_line, *tmp, *tmp2, *c;
1107         size_t line_len;
1108         s64 line_ip, offset = -1;
1109         regmatch_t match[2];
1110
1111         if (getline(&line, &line_len, file) < 0)
1112                 return -1;
1113
1114         if (!line)
1115                 return -1;
1116
1117         while (line_len != 0 && isspace(line[line_len - 1]))
1118                 line[--line_len] = '\0';
1119
1120         c = strchr(line, '\n');
1121         if (c)
1122                 *c = 0;
1123
1124         line_ip = -1;
1125         parsed_line = line;
1126
1127         /* /filename:linenr ? Save line number and ignore. */
1128         if (regexec(&file_lineno, line, 2, match, 0) == 0) {
1129                 *line_nr = atoi(line + match[1].rm_so);
1130                 return 0;
1131         }
1132
1133         /*
1134          * Strip leading spaces:
1135          */
1136         tmp = line;
1137         while (*tmp) {
1138                 if (*tmp != ' ')
1139                         break;
1140                 tmp++;
1141         }
1142
1143         if (*tmp) {
1144                 /*
1145                  * Parse hexa addresses followed by ':'
1146                  */
1147                 line_ip = strtoull(tmp, &tmp2, 16);
1148                 if (*tmp2 != ':' || tmp == tmp2 || tmp2[1] == '\0')
1149                         line_ip = -1;
1150         }
1151
1152         if (line_ip != -1) {
1153                 u64 start = map__rip_2objdump(map, sym->start),
1154                     end = map__rip_2objdump(map, sym->end);
1155
1156                 offset = line_ip - start;
1157                 if ((u64)line_ip < start || (u64)line_ip >= end)
1158                         offset = -1;
1159                 else
1160                         parsed_line = tmp2 + 1;
1161         }
1162
1163         dl = disasm_line__new(offset, parsed_line, privsize, *line_nr, map);
1164         free(line);
1165         (*line_nr)++;
1166
1167         if (dl == NULL)
1168                 return -1;
1169
1170         if (dl->ops.target.offset == UINT64_MAX)
1171                 dl->ops.target.offset = dl->ops.target.addr -
1172                                         map__rip_2objdump(map, sym->start);
1173
1174         /* kcore has no symbols, so add the call target name */
1175         if (dl->ins && ins__is_call(dl->ins) && !dl->ops.target.name) {
1176                 struct addr_map_symbol target = {
1177                         .map = map,
1178                         .addr = dl->ops.target.addr,
1179                 };
1180
1181                 if (!map_groups__find_ams(&target) &&
1182                     target.sym->start == target.al_addr)
1183                         dl->ops.target.name = strdup(target.sym->name);
1184         }
1185
1186         disasm__add(&notes->src->source, dl);
1187
1188         return 0;
1189 }
1190
1191 static __attribute__((constructor)) void symbol__init_regexpr(void)
1192 {
1193         regcomp(&file_lineno, "^/[^:]+:([0-9]+)", REG_EXTENDED);
1194 }
1195
1196 static void delete_last_nop(struct symbol *sym)
1197 {
1198         struct annotation *notes = symbol__annotation(sym);
1199         struct list_head *list = &notes->src->source;
1200         struct disasm_line *dl;
1201
1202         while (!list_empty(list)) {
1203                 dl = list_entry(list->prev, struct disasm_line, node);
1204
1205                 if (dl->ins && dl->ins->ops) {
1206                         if (dl->ins->ops != &nop_ops)
1207                                 return;
1208                 } else {
1209                         if (!strstr(dl->line, " nop ") &&
1210                             !strstr(dl->line, " nopl ") &&
1211                             !strstr(dl->line, " nopw "))
1212                                 return;
1213                 }
1214
1215                 list_del(&dl->node);
1216                 disasm_line__free(dl);
1217         }
1218 }
1219
1220 int symbol__strerror_disassemble(struct symbol *sym __maybe_unused, struct map *map,
1221                               int errnum, char *buf, size_t buflen)
1222 {
1223         struct dso *dso = map->dso;
1224
1225         BUG_ON(buflen == 0);
1226
1227         if (errnum >= 0) {
1228                 str_error_r(errnum, buf, buflen);
1229                 return 0;
1230         }
1231
1232         switch (errnum) {
1233         case SYMBOL_ANNOTATE_ERRNO__NO_VMLINUX: {
1234                 char bf[SBUILD_ID_SIZE + 15] = " with build id ";
1235                 char *build_id_msg = NULL;
1236
1237                 if (dso->has_build_id) {
1238                         build_id__sprintf(dso->build_id,
1239                                           sizeof(dso->build_id), bf + 15);
1240                         build_id_msg = bf;
1241                 }
1242                 scnprintf(buf, buflen,
1243                           "No vmlinux file%s\nwas found in the path.\n\n"
1244                           "Note that annotation using /proc/kcore requires CAP_SYS_RAWIO capability.\n\n"
1245                           "Please use:\n\n"
1246                           "  perf buildid-cache -vu vmlinux\n\n"
1247                           "or:\n\n"
1248                           "  --vmlinux vmlinux\n", build_id_msg ?: "");
1249         }
1250                 break;
1251         default:
1252                 scnprintf(buf, buflen, "Internal error: Invalid %d error code\n", errnum);
1253                 break;
1254         }
1255
1256         return 0;
1257 }
1258
1259 static int dso__disassemble_filename(struct dso *dso, char *filename, size_t filename_size)
1260 {
1261         char linkname[PATH_MAX];
1262         char *build_id_filename;
1263         char *build_id_path = NULL;
1264
1265         if (dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS &&
1266             !dso__is_kcore(dso))
1267                 return SYMBOL_ANNOTATE_ERRNO__NO_VMLINUX;
1268
1269         build_id_filename = dso__build_id_filename(dso, NULL, 0);
1270         if (build_id_filename) {
1271                 __symbol__join_symfs(filename, filename_size, build_id_filename);
1272                 free(build_id_filename);
1273         } else {
1274                 if (dso->has_build_id)
1275                         return ENOMEM;
1276                 goto fallback;
1277         }
1278
1279         build_id_path = strdup(filename);
1280         if (!build_id_path)
1281                 return -1;
1282
1283         dirname(build_id_path);
1284
1285         if (dso__is_kcore(dso) ||
1286             readlink(build_id_path, linkname, sizeof(linkname)) < 0 ||
1287             strstr(linkname, DSO__NAME_KALLSYMS) ||
1288             access(filename, R_OK)) {
1289 fallback:
1290                 /*
1291                  * If we don't have build-ids or the build-id file isn't in the
1292                  * cache, or is just a kallsyms file, well, lets hope that this
1293                  * DSO is the same as when 'perf record' ran.
1294                  */
1295                 __symbol__join_symfs(filename, filename_size, dso->long_name);
1296         }
1297
1298         free(build_id_path);
1299         return 0;
1300 }
1301
1302 int symbol__disassemble(struct symbol *sym, struct map *map, size_t privsize)
1303 {
1304         struct dso *dso = map->dso;
1305         char *command;
1306         FILE *file;
1307         char symfs_filename[PATH_MAX];
1308         struct kcore_extract kce;
1309         bool delete_extract = false;
1310         int stdout_fd[2];
1311         int lineno = 0;
1312         int nline;
1313         pid_t pid;
1314         int err = dso__disassemble_filename(dso, symfs_filename, sizeof(symfs_filename));
1315
1316         if (err)
1317                 return err;
1318
1319         pr_debug("%s: filename=%s, sym=%s, start=%#" PRIx64 ", end=%#" PRIx64 "\n", __func__,
1320                  symfs_filename, sym->name, map->unmap_ip(map, sym->start),
1321                  map->unmap_ip(map, sym->end));
1322
1323         pr_debug("annotating [%p] %30s : [%p] %30s\n",
1324                  dso, dso->long_name, sym, sym->name);
1325
1326         if (dso__is_kcore(dso)) {
1327                 kce.kcore_filename = symfs_filename;
1328                 kce.addr = map__rip_2objdump(map, sym->start);
1329                 kce.offs = sym->start;
1330                 kce.len = sym->end - sym->start;
1331                 if (!kcore_extract__create(&kce)) {
1332                         delete_extract = true;
1333                         strlcpy(symfs_filename, kce.extract_filename,
1334                                 sizeof(symfs_filename));
1335                 }
1336         } else if (dso__needs_decompress(dso)) {
1337                 char tmp[PATH_MAX];
1338                 struct kmod_path m;
1339                 int fd;
1340                 bool ret;
1341
1342                 if (kmod_path__parse_ext(&m, symfs_filename))
1343                         goto out;
1344
1345                 snprintf(tmp, PATH_MAX, "/tmp/perf-kmod-XXXXXX");
1346
1347                 fd = mkstemp(tmp);
1348                 if (fd < 0) {
1349                         free(m.ext);
1350                         goto out;
1351                 }
1352
1353                 ret = decompress_to_file(m.ext, symfs_filename, fd);
1354
1355                 if (ret)
1356                         pr_err("Cannot decompress %s %s\n", m.ext, symfs_filename);
1357
1358                 free(m.ext);
1359                 close(fd);
1360
1361                 if (!ret)
1362                         goto out;
1363
1364                 strcpy(symfs_filename, tmp);
1365         }
1366
1367         err = asprintf(&command,
1368                  "%s %s%s --start-address=0x%016" PRIx64
1369                  " --stop-address=0x%016" PRIx64
1370                  " -l -d %s %s -C %s 2>/dev/null|grep -v %s|expand",
1371                  objdump_path ? objdump_path : "objdump",
1372                  disassembler_style ? "-M " : "",
1373                  disassembler_style ? disassembler_style : "",
1374                  map__rip_2objdump(map, sym->start),
1375                  map__rip_2objdump(map, sym->end),
1376                  symbol_conf.annotate_asm_raw ? "" : "--no-show-raw",
1377                  symbol_conf.annotate_src ? "-S" : "",
1378                  symfs_filename, symfs_filename);
1379
1380         if (err < 0) {
1381                 pr_err("Failure allocating memory for the command to run\n");
1382                 goto out_remove_tmp;
1383         }
1384
1385         pr_debug("Executing: %s\n", command);
1386
1387         err = -1;
1388         if (pipe(stdout_fd) < 0) {
1389                 pr_err("Failure creating the pipe to run %s\n", command);
1390                 goto out_free_command;
1391         }
1392
1393         pid = fork();
1394         if (pid < 0) {
1395                 pr_err("Failure forking to run %s\n", command);
1396                 goto out_close_stdout;
1397         }
1398
1399         if (pid == 0) {
1400                 close(stdout_fd[0]);
1401                 dup2(stdout_fd[1], 1);
1402                 close(stdout_fd[1]);
1403                 execl("/bin/sh", "sh", "-c", command, NULL);
1404                 perror(command);
1405                 exit(-1);
1406         }
1407
1408         close(stdout_fd[1]);
1409
1410         file = fdopen(stdout_fd[0], "r");
1411         if (!file) {
1412                 pr_err("Failure creating FILE stream for %s\n", command);
1413                 /*
1414                  * If we were using debug info should retry with
1415                  * original binary.
1416                  */
1417                 goto out_free_command;
1418         }
1419
1420         nline = 0;
1421         while (!feof(file)) {
1422                 if (symbol__parse_objdump_line(sym, map, file, privsize,
1423                             &lineno) < 0)
1424                         break;
1425                 nline++;
1426         }
1427
1428         if (nline == 0)
1429                 pr_err("No output from %s\n", command);
1430
1431         /*
1432          * kallsyms does not have symbol sizes so there may a nop at the end.
1433          * Remove it.
1434          */
1435         if (dso__is_kcore(dso))
1436                 delete_last_nop(sym);
1437
1438         fclose(file);
1439         err = 0;
1440 out_free_command:
1441         free(command);
1442 out_remove_tmp:
1443         close(stdout_fd[0]);
1444
1445         if (dso__needs_decompress(dso))
1446                 unlink(symfs_filename);
1447
1448         if (delete_extract)
1449                 kcore_extract__delete(&kce);
1450 out:
1451         return err;
1452
1453 out_close_stdout:
1454         close(stdout_fd[1]);
1455         goto out_free_command;
1456 }
1457
1458 static void insert_source_line(struct rb_root *root, struct source_line *src_line)
1459 {
1460         struct source_line *iter;
1461         struct rb_node **p = &root->rb_node;
1462         struct rb_node *parent = NULL;
1463         int i, ret;
1464
1465         while (*p != NULL) {
1466                 parent = *p;
1467                 iter = rb_entry(parent, struct source_line, node);
1468
1469                 ret = strcmp(iter->path, src_line->path);
1470                 if (ret == 0) {
1471                         for (i = 0; i < src_line->nr_pcnt; i++)
1472                                 iter->samples[i].percent_sum += src_line->samples[i].percent;
1473                         return;
1474                 }
1475
1476                 if (ret < 0)
1477                         p = &(*p)->rb_left;
1478                 else
1479                         p = &(*p)->rb_right;
1480         }
1481
1482         for (i = 0; i < src_line->nr_pcnt; i++)
1483                 src_line->samples[i].percent_sum = src_line->samples[i].percent;
1484
1485         rb_link_node(&src_line->node, parent, p);
1486         rb_insert_color(&src_line->node, root);
1487 }
1488
1489 static int cmp_source_line(struct source_line *a, struct source_line *b)
1490 {
1491         int i;
1492
1493         for (i = 0; i < a->nr_pcnt; i++) {
1494                 if (a->samples[i].percent_sum == b->samples[i].percent_sum)
1495                         continue;
1496                 return a->samples[i].percent_sum > b->samples[i].percent_sum;
1497         }
1498
1499         return 0;
1500 }
1501
1502 static void __resort_source_line(struct rb_root *root, struct source_line *src_line)
1503 {
1504         struct source_line *iter;
1505         struct rb_node **p = &root->rb_node;
1506         struct rb_node *parent = NULL;
1507
1508         while (*p != NULL) {
1509                 parent = *p;
1510                 iter = rb_entry(parent, struct source_line, node);
1511
1512                 if (cmp_source_line(src_line, iter))
1513                         p = &(*p)->rb_left;
1514                 else
1515                         p = &(*p)->rb_right;
1516         }
1517
1518         rb_link_node(&src_line->node, parent, p);
1519         rb_insert_color(&src_line->node, root);
1520 }
1521
1522 static void resort_source_line(struct rb_root *dest_root, struct rb_root *src_root)
1523 {
1524         struct source_line *src_line;
1525         struct rb_node *node;
1526
1527         node = rb_first(src_root);
1528         while (node) {
1529                 struct rb_node *next;
1530
1531                 src_line = rb_entry(node, struct source_line, node);
1532                 next = rb_next(node);
1533                 rb_erase(node, src_root);
1534
1535                 __resort_source_line(dest_root, src_line);
1536                 node = next;
1537         }
1538 }
1539
1540 static void symbol__free_source_line(struct symbol *sym, int len)
1541 {
1542         struct annotation *notes = symbol__annotation(sym);
1543         struct source_line *src_line = notes->src->lines;
1544         size_t sizeof_src_line;
1545         int i;
1546
1547         sizeof_src_line = sizeof(*src_line) +
1548                           (sizeof(src_line->samples) * (src_line->nr_pcnt - 1));
1549
1550         for (i = 0; i < len; i++) {
1551                 free_srcline(src_line->path);
1552                 src_line = (void *)src_line + sizeof_src_line;
1553         }
1554
1555         zfree(&notes->src->lines);
1556 }
1557
1558 /* Get the filename:line for the colored entries */
1559 static int symbol__get_source_line(struct symbol *sym, struct map *map,
1560                                    struct perf_evsel *evsel,
1561                                    struct rb_root *root, int len)
1562 {
1563         u64 start;
1564         int i, k;
1565         int evidx = evsel->idx;
1566         struct source_line *src_line;
1567         struct annotation *notes = symbol__annotation(sym);
1568         struct sym_hist *h = annotation__histogram(notes, evidx);
1569         struct rb_root tmp_root = RB_ROOT;
1570         int nr_pcnt = 1;
1571         u64 h_sum = h->sum;
1572         size_t sizeof_src_line = sizeof(struct source_line);
1573
1574         if (perf_evsel__is_group_event(evsel)) {
1575                 for (i = 1; i < evsel->nr_members; i++) {
1576                         h = annotation__histogram(notes, evidx + i);
1577                         h_sum += h->sum;
1578                 }
1579                 nr_pcnt = evsel->nr_members;
1580                 sizeof_src_line += (nr_pcnt - 1) * sizeof(src_line->samples);
1581         }
1582
1583         if (!h_sum)
1584                 return 0;
1585
1586         src_line = notes->src->lines = calloc(len, sizeof_src_line);
1587         if (!notes->src->lines)
1588                 return -1;
1589
1590         start = map__rip_2objdump(map, sym->start);
1591
1592         for (i = 0; i < len; i++) {
1593                 u64 offset;
1594                 double percent_max = 0.0;
1595
1596                 src_line->nr_pcnt = nr_pcnt;
1597
1598                 for (k = 0; k < nr_pcnt; k++) {
1599                         h = annotation__histogram(notes, evidx + k);
1600                         src_line->samples[k].percent = 100.0 * h->addr[i] / h->sum;
1601
1602                         if (src_line->samples[k].percent > percent_max)
1603                                 percent_max = src_line->samples[k].percent;
1604                 }
1605
1606                 if (percent_max <= 0.5)
1607                         goto next;
1608
1609                 offset = start + i;
1610                 src_line->path = get_srcline(map->dso, offset, NULL, false);
1611                 insert_source_line(&tmp_root, src_line);
1612
1613         next:
1614                 src_line = (void *)src_line + sizeof_src_line;
1615         }
1616
1617         resort_source_line(root, &tmp_root);
1618         return 0;
1619 }
1620
1621 static void print_summary(struct rb_root *root, const char *filename)
1622 {
1623         struct source_line *src_line;
1624         struct rb_node *node;
1625
1626         printf("\nSorted summary for file %s\n", filename);
1627         printf("----------------------------------------------\n\n");
1628
1629         if (RB_EMPTY_ROOT(root)) {
1630                 printf(" Nothing higher than %1.1f%%\n", MIN_GREEN);
1631                 return;
1632         }
1633
1634         node = rb_first(root);
1635         while (node) {
1636                 double percent, percent_max = 0.0;
1637                 const char *color;
1638                 char *path;
1639                 int i;
1640
1641                 src_line = rb_entry(node, struct source_line, node);
1642                 for (i = 0; i < src_line->nr_pcnt; i++) {
1643                         percent = src_line->samples[i].percent_sum;
1644                         color = get_percent_color(percent);
1645                         color_fprintf(stdout, color, " %7.2f", percent);
1646
1647                         if (percent > percent_max)
1648                                 percent_max = percent;
1649                 }
1650
1651                 path = src_line->path;
1652                 color = get_percent_color(percent_max);
1653                 color_fprintf(stdout, color, " %s\n", path);
1654
1655                 node = rb_next(node);
1656         }
1657 }
1658
1659 static void symbol__annotate_hits(struct symbol *sym, struct perf_evsel *evsel)
1660 {
1661         struct annotation *notes = symbol__annotation(sym);
1662         struct sym_hist *h = annotation__histogram(notes, evsel->idx);
1663         u64 len = symbol__size(sym), offset;
1664
1665         for (offset = 0; offset < len; ++offset)
1666                 if (h->addr[offset] != 0)
1667                         printf("%*" PRIx64 ": %" PRIu64 "\n", BITS_PER_LONG / 2,
1668                                sym->start + offset, h->addr[offset]);
1669         printf("%*s: %" PRIu64 "\n", BITS_PER_LONG / 2, "h->sum", h->sum);
1670 }
1671
1672 int symbol__annotate_printf(struct symbol *sym, struct map *map,
1673                             struct perf_evsel *evsel, bool full_paths,
1674                             int min_pcnt, int max_lines, int context)
1675 {
1676         struct dso *dso = map->dso;
1677         char *filename;
1678         const char *d_filename;
1679         const char *evsel_name = perf_evsel__name(evsel);
1680         struct annotation *notes = symbol__annotation(sym);
1681         struct sym_hist *h = annotation__histogram(notes, evsel->idx);
1682         struct disasm_line *pos, *queue = NULL;
1683         u64 start = map__rip_2objdump(map, sym->start);
1684         int printed = 2, queue_len = 0;
1685         int more = 0;
1686         u64 len;
1687         int width = 8;
1688         int graph_dotted_len;
1689
1690         filename = strdup(dso->long_name);
1691         if (!filename)
1692                 return -ENOMEM;
1693
1694         if (full_paths)
1695                 d_filename = filename;
1696         else
1697                 d_filename = basename(filename);
1698
1699         len = symbol__size(sym);
1700
1701         if (perf_evsel__is_group_event(evsel))
1702                 width *= evsel->nr_members;
1703
1704         graph_dotted_len = printf(" %-*.*s|     Source code & Disassembly of %s for %s (%" PRIu64 " samples)\n",
1705                width, width, "Percent", d_filename, evsel_name, h->sum);
1706
1707         printf("%-*.*s----\n",
1708                graph_dotted_len, graph_dotted_len, graph_dotted_line);
1709
1710         if (verbose)
1711                 symbol__annotate_hits(sym, evsel);
1712
1713         list_for_each_entry(pos, &notes->src->source, node) {
1714                 if (context && queue == NULL) {
1715                         queue = pos;
1716                         queue_len = 0;
1717                 }
1718
1719                 switch (disasm_line__print(pos, sym, start, evsel, len,
1720                                             min_pcnt, printed, max_lines,
1721                                             queue)) {
1722                 case 0:
1723                         ++printed;
1724                         if (context) {
1725                                 printed += queue_len;
1726                                 queue = NULL;
1727                                 queue_len = 0;
1728                         }
1729                         break;
1730                 case 1:
1731                         /* filtered by max_lines */
1732                         ++more;
1733                         break;
1734                 case -1:
1735                 default:
1736                         /*
1737                          * Filtered by min_pcnt or non IP lines when
1738                          * context != 0
1739                          */
1740                         if (!context)
1741                                 break;
1742                         if (queue_len == context)
1743                                 queue = list_entry(queue->node.next, typeof(*queue), node);
1744                         else
1745                                 ++queue_len;
1746                         break;
1747                 }
1748         }
1749
1750         free(filename);
1751
1752         return more;
1753 }
1754
1755 void symbol__annotate_zero_histogram(struct symbol *sym, int evidx)
1756 {
1757         struct annotation *notes = symbol__annotation(sym);
1758         struct sym_hist *h = annotation__histogram(notes, evidx);
1759
1760         memset(h, 0, notes->src->sizeof_sym_hist);
1761 }
1762
1763 void symbol__annotate_decay_histogram(struct symbol *sym, int evidx)
1764 {
1765         struct annotation *notes = symbol__annotation(sym);
1766         struct sym_hist *h = annotation__histogram(notes, evidx);
1767         int len = symbol__size(sym), offset;
1768
1769         h->sum = 0;
1770         for (offset = 0; offset < len; ++offset) {
1771                 h->addr[offset] = h->addr[offset] * 7 / 8;
1772                 h->sum += h->addr[offset];
1773         }
1774 }
1775
1776 void disasm__purge(struct list_head *head)
1777 {
1778         struct disasm_line *pos, *n;
1779
1780         list_for_each_entry_safe(pos, n, head, node) {
1781                 list_del(&pos->node);
1782                 disasm_line__free(pos);
1783         }
1784 }
1785
1786 static size_t disasm_line__fprintf(struct disasm_line *dl, FILE *fp)
1787 {
1788         size_t printed;
1789
1790         if (dl->offset == -1)
1791                 return fprintf(fp, "%s\n", dl->line);
1792
1793         printed = fprintf(fp, "%#" PRIx64 " %s", dl->offset, dl->name);
1794
1795         if (dl->ops.raw[0] != '\0') {
1796                 printed += fprintf(fp, "%.*s %s\n", 6 - (int)printed, " ",
1797                                    dl->ops.raw);
1798         }
1799
1800         return printed + fprintf(fp, "\n");
1801 }
1802
1803 size_t disasm__fprintf(struct list_head *head, FILE *fp)
1804 {
1805         struct disasm_line *pos;
1806         size_t printed = 0;
1807
1808         list_for_each_entry(pos, head, node)
1809                 printed += disasm_line__fprintf(pos, fp);
1810
1811         return printed;
1812 }
1813
1814 int symbol__tty_annotate(struct symbol *sym, struct map *map,
1815                          struct perf_evsel *evsel, bool print_lines,
1816                          bool full_paths, int min_pcnt, int max_lines)
1817 {
1818         struct dso *dso = map->dso;
1819         struct rb_root source_line = RB_ROOT;
1820         u64 len;
1821
1822         if (symbol__disassemble(sym, map, 0) < 0)
1823                 return -1;
1824
1825         len = symbol__size(sym);
1826
1827         if (print_lines) {
1828                 srcline_full_filename = full_paths;
1829                 symbol__get_source_line(sym, map, evsel, &source_line, len);
1830                 print_summary(&source_line, dso->long_name);
1831         }
1832
1833         symbol__annotate_printf(sym, map, evsel, full_paths,
1834                                 min_pcnt, max_lines, 0);
1835         if (print_lines)
1836                 symbol__free_source_line(sym, len);
1837
1838         disasm__purge(&symbol__annotation(sym)->src->source);
1839
1840         return 0;
1841 }
1842
1843 bool ui__has_annotation(void)
1844 {
1845         return use_browser == 1 && perf_hpp_list.sym;
1846 }