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perf annotate: Handle ins parsing failures
[deliverable/linux.git] / 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 <regex.h>
21 #include <pthread.h>
22 #include <linux/bitops.h>
23
24 const char *disassembler_style;
25 const char *objdump_path;
26 static regex_t file_lineno;
27
28 static struct ins *ins__find(const char *name);
29 static int disasm_line__parse(char *line, char **namep, char **rawp);
30
31 static void ins__delete(struct ins_operands *ops)
32 {
33 zfree(&ops->source.raw);
34 zfree(&ops->source.name);
35 zfree(&ops->target.raw);
36 zfree(&ops->target.name);
37 }
38
39 static int ins__raw_scnprintf(struct ins *ins, char *bf, size_t size,
40 struct ins_operands *ops)
41 {
42 return scnprintf(bf, size, "%-6.6s %s", ins->name, ops->raw);
43 }
44
45 int ins__scnprintf(struct ins *ins, char *bf, size_t size,
46 struct ins_operands *ops)
47 {
48 if (ins->ops->scnprintf)
49 return ins->ops->scnprintf(ins, bf, size, ops);
50
51 return ins__raw_scnprintf(ins, bf, size, ops);
52 }
53
54 static int call__parse(struct ins_operands *ops)
55 {
56 char *endptr, *tok, *name;
57
58 ops->target.addr = strtoull(ops->raw, &endptr, 16);
59
60 name = strchr(endptr, '<');
61 if (name == NULL)
62 goto indirect_call;
63
64 name++;
65
66 tok = strchr(name, '>');
67 if (tok == NULL)
68 return -1;
69
70 *tok = '\0';
71 ops->target.name = strdup(name);
72 *tok = '>';
73
74 return ops->target.name == NULL ? -1 : 0;
75
76 indirect_call:
77 tok = strchr(endptr, '(');
78 if (tok != NULL) {
79 ops->target.addr = 0;
80 return 0;
81 }
82
83 tok = strchr(endptr, '*');
84 if (tok == NULL)
85 return -1;
86
87 ops->target.addr = strtoull(tok + 1, NULL, 16);
88 return 0;
89 }
90
91 static int call__scnprintf(struct ins *ins, char *bf, size_t size,
92 struct ins_operands *ops)
93 {
94 if (ops->target.name)
95 return scnprintf(bf, size, "%-6.6s %s", ins->name, ops->target.name);
96
97 if (ops->target.addr == 0)
98 return ins__raw_scnprintf(ins, bf, size, ops);
99
100 return scnprintf(bf, size, "%-6.6s *%" PRIx64, ins->name, ops->target.addr);
101 }
102
103 static struct ins_ops call_ops = {
104 .parse = call__parse,
105 .scnprintf = call__scnprintf,
106 };
107
108 bool ins__is_call(const struct ins *ins)
109 {
110 return ins->ops == &call_ops;
111 }
112
113 static int jump__parse(struct ins_operands *ops)
114 {
115 const char *s = strchr(ops->raw, '+');
116
117 ops->target.addr = strtoull(ops->raw, NULL, 16);
118
119 if (s++ != NULL)
120 ops->target.offset = strtoull(s, NULL, 16);
121 else
122 ops->target.offset = UINT64_MAX;
123
124 return 0;
125 }
126
127 static int jump__scnprintf(struct ins *ins, char *bf, size_t size,
128 struct ins_operands *ops)
129 {
130 return scnprintf(bf, size, "%-6.6s %" PRIx64, ins->name, ops->target.offset);
131 }
132
133 static struct ins_ops jump_ops = {
134 .parse = jump__parse,
135 .scnprintf = jump__scnprintf,
136 };
137
138 bool ins__is_jump(const struct ins *ins)
139 {
140 return ins->ops == &jump_ops;
141 }
142
143 static int comment__symbol(char *raw, char *comment, u64 *addrp, char **namep)
144 {
145 char *endptr, *name, *t;
146
147 if (strstr(raw, "(%rip)") == NULL)
148 return 0;
149
150 *addrp = strtoull(comment, &endptr, 16);
151 name = strchr(endptr, '<');
152 if (name == NULL)
153 return -1;
154
155 name++;
156
157 t = strchr(name, '>');
158 if (t == NULL)
159 return 0;
160
161 *t = '\0';
162 *namep = strdup(name);
163 *t = '>';
164
165 return 0;
166 }
167
168 static int lock__parse(struct ins_operands *ops)
169 {
170 char *name;
171
172 ops->locked.ops = zalloc(sizeof(*ops->locked.ops));
173 if (ops->locked.ops == NULL)
174 return 0;
175
176 if (disasm_line__parse(ops->raw, &name, &ops->locked.ops->raw) < 0)
177 goto out_free_ops;
178
179 ops->locked.ins = ins__find(name);
180 if (ops->locked.ins == NULL)
181 goto out_free_ops;
182
183 if (!ops->locked.ins->ops)
184 return 0;
185
186 if (ops->locked.ins->ops->parse &&
187 ops->locked.ins->ops->parse(ops->locked.ops) < 0)
188 goto out_free_ops;
189
190 return 0;
191
192 out_free_ops:
193 zfree(&ops->locked.ops);
194 return 0;
195 }
196
197 static int lock__scnprintf(struct ins *ins, char *bf, size_t size,
198 struct ins_operands *ops)
199 {
200 int printed;
201
202 if (ops->locked.ins == NULL)
203 return ins__raw_scnprintf(ins, bf, size, ops);
204
205 printed = scnprintf(bf, size, "%-6.6s ", ins->name);
206 return printed + ins__scnprintf(ops->locked.ins, bf + printed,
207 size - printed, ops->locked.ops);
208 }
209
210 static void lock__delete(struct ins_operands *ops)
211 {
212 zfree(&ops->locked.ops);
213 zfree(&ops->target.raw);
214 zfree(&ops->target.name);
215 }
216
217 static struct ins_ops lock_ops = {
218 .free = lock__delete,
219 .parse = lock__parse,
220 .scnprintf = lock__scnprintf,
221 };
222
223 static int mov__parse(struct ins_operands *ops)
224 {
225 char *s = strchr(ops->raw, ','), *target, *comment, prev;
226
227 if (s == NULL)
228 return -1;
229
230 *s = '\0';
231 ops->source.raw = strdup(ops->raw);
232 *s = ',';
233
234 if (ops->source.raw == NULL)
235 return -1;
236
237 target = ++s;
238 comment = strchr(s, '#');
239
240 if (comment != NULL)
241 s = comment - 1;
242 else
243 s = strchr(s, '\0') - 1;
244
245 while (s > target && isspace(s[0]))
246 --s;
247 s++;
248 prev = *s;
249 *s = '\0';
250
251 ops->target.raw = strdup(target);
252 *s = prev;
253
254 if (ops->target.raw == NULL)
255 goto out_free_source;
256
257 if (comment == NULL)
258 return 0;
259
260 while (comment[0] != '\0' && isspace(comment[0]))
261 ++comment;
262
263 comment__symbol(ops->source.raw, comment, &ops->source.addr, &ops->source.name);
264 comment__symbol(ops->target.raw, comment, &ops->target.addr, &ops->target.name);
265
266 return 0;
267
268 out_free_source:
269 zfree(&ops->source.raw);
270 return -1;
271 }
272
273 static int mov__scnprintf(struct ins *ins, char *bf, size_t size,
274 struct ins_operands *ops)
275 {
276 return scnprintf(bf, size, "%-6.6s %s,%s", ins->name,
277 ops->source.name ?: ops->source.raw,
278 ops->target.name ?: ops->target.raw);
279 }
280
281 static struct ins_ops mov_ops = {
282 .parse = mov__parse,
283 .scnprintf = mov__scnprintf,
284 };
285
286 static int dec__parse(struct ins_operands *ops)
287 {
288 char *target, *comment, *s, prev;
289
290 target = s = ops->raw;
291
292 while (s[0] != '\0' && !isspace(s[0]))
293 ++s;
294 prev = *s;
295 *s = '\0';
296
297 ops->target.raw = strdup(target);
298 *s = prev;
299
300 if (ops->target.raw == NULL)
301 return -1;
302
303 comment = strchr(s, '#');
304 if (comment == NULL)
305 return 0;
306
307 while (comment[0] != '\0' && isspace(comment[0]))
308 ++comment;
309
310 comment__symbol(ops->target.raw, comment, &ops->target.addr, &ops->target.name);
311
312 return 0;
313 }
314
315 static int dec__scnprintf(struct ins *ins, char *bf, size_t size,
316 struct ins_operands *ops)
317 {
318 return scnprintf(bf, size, "%-6.6s %s", ins->name,
319 ops->target.name ?: ops->target.raw);
320 }
321
322 static struct ins_ops dec_ops = {
323 .parse = dec__parse,
324 .scnprintf = dec__scnprintf,
325 };
326
327 static int nop__scnprintf(struct ins *ins __maybe_unused, char *bf, size_t size,
328 struct ins_operands *ops __maybe_unused)
329 {
330 return scnprintf(bf, size, "%-6.6s", "nop");
331 }
332
333 static struct ins_ops nop_ops = {
334 .scnprintf = nop__scnprintf,
335 };
336
337 /*
338 * Must be sorted by name!
339 */
340 static struct ins instructions[] = {
341 { .name = "add", .ops = &mov_ops, },
342 { .name = "addl", .ops = &mov_ops, },
343 { .name = "addq", .ops = &mov_ops, },
344 { .name = "addw", .ops = &mov_ops, },
345 { .name = "and", .ops = &mov_ops, },
346 { .name = "bts", .ops = &mov_ops, },
347 { .name = "call", .ops = &call_ops, },
348 { .name = "callq", .ops = &call_ops, },
349 { .name = "cmp", .ops = &mov_ops, },
350 { .name = "cmpb", .ops = &mov_ops, },
351 { .name = "cmpl", .ops = &mov_ops, },
352 { .name = "cmpq", .ops = &mov_ops, },
353 { .name = "cmpw", .ops = &mov_ops, },
354 { .name = "cmpxch", .ops = &mov_ops, },
355 { .name = "dec", .ops = &dec_ops, },
356 { .name = "decl", .ops = &dec_ops, },
357 { .name = "imul", .ops = &mov_ops, },
358 { .name = "inc", .ops = &dec_ops, },
359 { .name = "incl", .ops = &dec_ops, },
360 { .name = "ja", .ops = &jump_ops, },
361 { .name = "jae", .ops = &jump_ops, },
362 { .name = "jb", .ops = &jump_ops, },
363 { .name = "jbe", .ops = &jump_ops, },
364 { .name = "jc", .ops = &jump_ops, },
365 { .name = "jcxz", .ops = &jump_ops, },
366 { .name = "je", .ops = &jump_ops, },
367 { .name = "jecxz", .ops = &jump_ops, },
368 { .name = "jg", .ops = &jump_ops, },
369 { .name = "jge", .ops = &jump_ops, },
370 { .name = "jl", .ops = &jump_ops, },
371 { .name = "jle", .ops = &jump_ops, },
372 { .name = "jmp", .ops = &jump_ops, },
373 { .name = "jmpq", .ops = &jump_ops, },
374 { .name = "jna", .ops = &jump_ops, },
375 { .name = "jnae", .ops = &jump_ops, },
376 { .name = "jnb", .ops = &jump_ops, },
377 { .name = "jnbe", .ops = &jump_ops, },
378 { .name = "jnc", .ops = &jump_ops, },
379 { .name = "jne", .ops = &jump_ops, },
380 { .name = "jng", .ops = &jump_ops, },
381 { .name = "jnge", .ops = &jump_ops, },
382 { .name = "jnl", .ops = &jump_ops, },
383 { .name = "jnle", .ops = &jump_ops, },
384 { .name = "jno", .ops = &jump_ops, },
385 { .name = "jnp", .ops = &jump_ops, },
386 { .name = "jns", .ops = &jump_ops, },
387 { .name = "jnz", .ops = &jump_ops, },
388 { .name = "jo", .ops = &jump_ops, },
389 { .name = "jp", .ops = &jump_ops, },
390 { .name = "jpe", .ops = &jump_ops, },
391 { .name = "jpo", .ops = &jump_ops, },
392 { .name = "jrcxz", .ops = &jump_ops, },
393 { .name = "js", .ops = &jump_ops, },
394 { .name = "jz", .ops = &jump_ops, },
395 { .name = "lea", .ops = &mov_ops, },
396 { .name = "lock", .ops = &lock_ops, },
397 { .name = "mov", .ops = &mov_ops, },
398 { .name = "movb", .ops = &mov_ops, },
399 { .name = "movdqa",.ops = &mov_ops, },
400 { .name = "movl", .ops = &mov_ops, },
401 { .name = "movq", .ops = &mov_ops, },
402 { .name = "movslq", .ops = &mov_ops, },
403 { .name = "movzbl", .ops = &mov_ops, },
404 { .name = "movzwl", .ops = &mov_ops, },
405 { .name = "nop", .ops = &nop_ops, },
406 { .name = "nopl", .ops = &nop_ops, },
407 { .name = "nopw", .ops = &nop_ops, },
408 { .name = "or", .ops = &mov_ops, },
409 { .name = "orl", .ops = &mov_ops, },
410 { .name = "test", .ops = &mov_ops, },
411 { .name = "testb", .ops = &mov_ops, },
412 { .name = "testl", .ops = &mov_ops, },
413 { .name = "xadd", .ops = &mov_ops, },
414 { .name = "xbeginl", .ops = &jump_ops, },
415 { .name = "xbeginq", .ops = &jump_ops, },
416 };
417
418 static int ins__cmp(const void *name, const void *insp)
419 {
420 const struct ins *ins = insp;
421
422 return strcmp(name, ins->name);
423 }
424
425 static struct ins *ins__find(const char *name)
426 {
427 const int nmemb = ARRAY_SIZE(instructions);
428
429 return bsearch(name, instructions, nmemb, sizeof(struct ins), ins__cmp);
430 }
431
432 int symbol__annotate_init(struct map *map __maybe_unused, struct symbol *sym)
433 {
434 struct annotation *notes = symbol__annotation(sym);
435 pthread_mutex_init(&notes->lock, NULL);
436 return 0;
437 }
438
439 int symbol__alloc_hist(struct symbol *sym)
440 {
441 struct annotation *notes = symbol__annotation(sym);
442 const size_t size = symbol__size(sym);
443 size_t sizeof_sym_hist;
444
445 /* Check for overflow when calculating sizeof_sym_hist */
446 if (size > (SIZE_MAX - sizeof(struct sym_hist)) / sizeof(u64))
447 return -1;
448
449 sizeof_sym_hist = (sizeof(struct sym_hist) + size * sizeof(u64));
450
451 /* Check for overflow in zalloc argument */
452 if (sizeof_sym_hist > (SIZE_MAX - sizeof(*notes->src))
453 / symbol_conf.nr_events)
454 return -1;
455
456 notes->src = zalloc(sizeof(*notes->src) + symbol_conf.nr_events * sizeof_sym_hist);
457 if (notes->src == NULL)
458 return -1;
459 notes->src->sizeof_sym_hist = sizeof_sym_hist;
460 notes->src->nr_histograms = symbol_conf.nr_events;
461 INIT_LIST_HEAD(&notes->src->source);
462 return 0;
463 }
464
465 void symbol__annotate_zero_histograms(struct symbol *sym)
466 {
467 struct annotation *notes = symbol__annotation(sym);
468
469 pthread_mutex_lock(&notes->lock);
470 if (notes->src != NULL)
471 memset(notes->src->histograms, 0,
472 notes->src->nr_histograms * notes->src->sizeof_sym_hist);
473 pthread_mutex_unlock(&notes->lock);
474 }
475
476 static int __symbol__inc_addr_samples(struct symbol *sym, struct map *map,
477 struct annotation *notes, int evidx, u64 addr)
478 {
479 unsigned offset;
480 struct sym_hist *h;
481
482 pr_debug3("%s: addr=%#" PRIx64 "\n", __func__, map->unmap_ip(map, addr));
483
484 if (addr < sym->start || addr >= sym->end)
485 return -ERANGE;
486
487 offset = addr - sym->start;
488 h = annotation__histogram(notes, evidx);
489 h->sum++;
490 h->addr[offset]++;
491
492 pr_debug3("%#" PRIx64 " %s: period++ [addr: %#" PRIx64 ", %#" PRIx64
493 ", evidx=%d] => %" PRIu64 "\n", sym->start, sym->name,
494 addr, addr - sym->start, evidx, h->addr[offset]);
495 return 0;
496 }
497
498 static int symbol__inc_addr_samples(struct symbol *sym, struct map *map,
499 int evidx, u64 addr)
500 {
501 struct annotation *notes;
502
503 if (sym == NULL)
504 return 0;
505
506 notes = symbol__annotation(sym);
507 if (notes->src == NULL) {
508 if (symbol__alloc_hist(sym) < 0)
509 return -ENOMEM;
510 }
511
512 return __symbol__inc_addr_samples(sym, map, notes, evidx, addr);
513 }
514
515 int addr_map_symbol__inc_samples(struct addr_map_symbol *ams, int evidx)
516 {
517 return symbol__inc_addr_samples(ams->sym, ams->map, evidx, ams->al_addr);
518 }
519
520 int hist_entry__inc_addr_samples(struct hist_entry *he, int evidx, u64 ip)
521 {
522 return symbol__inc_addr_samples(he->ms.sym, he->ms.map, evidx, ip);
523 }
524
525 static void disasm_line__init_ins(struct disasm_line *dl)
526 {
527 dl->ins = ins__find(dl->name);
528
529 if (dl->ins == NULL)
530 return;
531
532 if (!dl->ins->ops)
533 return;
534
535 if (dl->ins->ops->parse && dl->ins->ops->parse(&dl->ops) < 0)
536 dl->ins = NULL;
537 }
538
539 static int disasm_line__parse(char *line, char **namep, char **rawp)
540 {
541 char *name = line, tmp;
542
543 while (isspace(name[0]))
544 ++name;
545
546 if (name[0] == '\0')
547 return -1;
548
549 *rawp = name + 1;
550
551 while ((*rawp)[0] != '\0' && !isspace((*rawp)[0]))
552 ++*rawp;
553
554 tmp = (*rawp)[0];
555 (*rawp)[0] = '\0';
556 *namep = strdup(name);
557
558 if (*namep == NULL)
559 goto out_free_name;
560
561 (*rawp)[0] = tmp;
562
563 if ((*rawp)[0] != '\0') {
564 (*rawp)++;
565 while (isspace((*rawp)[0]))
566 ++(*rawp);
567 }
568
569 return 0;
570
571 out_free_name:
572 zfree(namep);
573 return -1;
574 }
575
576 static struct disasm_line *disasm_line__new(s64 offset, char *line,
577 size_t privsize, int line_nr)
578 {
579 struct disasm_line *dl = zalloc(sizeof(*dl) + privsize);
580
581 if (dl != NULL) {
582 dl->offset = offset;
583 dl->line = strdup(line);
584 dl->line_nr = line_nr;
585 if (dl->line == NULL)
586 goto out_delete;
587
588 if (offset != -1) {
589 if (disasm_line__parse(dl->line, &dl->name, &dl->ops.raw) < 0)
590 goto out_free_line;
591
592 disasm_line__init_ins(dl);
593 }
594 }
595
596 return dl;
597
598 out_free_line:
599 zfree(&dl->line);
600 out_delete:
601 free(dl);
602 return NULL;
603 }
604
605 void disasm_line__free(struct disasm_line *dl)
606 {
607 zfree(&dl->line);
608 zfree(&dl->name);
609 if (dl->ins && dl->ins->ops->free)
610 dl->ins->ops->free(&dl->ops);
611 else
612 ins__delete(&dl->ops);
613 free(dl);
614 }
615
616 int disasm_line__scnprintf(struct disasm_line *dl, char *bf, size_t size, bool raw)
617 {
618 if (raw || !dl->ins)
619 return scnprintf(bf, size, "%-6.6s %s", dl->name, dl->ops.raw);
620
621 return ins__scnprintf(dl->ins, bf, size, &dl->ops);
622 }
623
624 static void disasm__add(struct list_head *head, struct disasm_line *line)
625 {
626 list_add_tail(&line->node, head);
627 }
628
629 struct disasm_line *disasm__get_next_ip_line(struct list_head *head, struct disasm_line *pos)
630 {
631 list_for_each_entry_continue(pos, head, node)
632 if (pos->offset >= 0)
633 return pos;
634
635 return NULL;
636 }
637
638 double disasm__calc_percent(struct annotation *notes, int evidx, s64 offset,
639 s64 end, const char **path)
640 {
641 struct source_line *src_line = notes->src->lines;
642 double percent = 0.0;
643
644 if (src_line) {
645 size_t sizeof_src_line = sizeof(*src_line) +
646 sizeof(src_line->p) * (src_line->nr_pcnt - 1);
647
648 while (offset < end) {
649 src_line = (void *)notes->src->lines +
650 (sizeof_src_line * offset);
651
652 if (*path == NULL)
653 *path = src_line->path;
654
655 percent += src_line->p[evidx].percent;
656 offset++;
657 }
658 } else {
659 struct sym_hist *h = annotation__histogram(notes, evidx);
660 unsigned int hits = 0;
661
662 while (offset < end)
663 hits += h->addr[offset++];
664
665 if (h->sum)
666 percent = 100.0 * hits / h->sum;
667 }
668
669 return percent;
670 }
671
672 static int disasm_line__print(struct disasm_line *dl, struct symbol *sym, u64 start,
673 struct perf_evsel *evsel, u64 len, int min_pcnt, int printed,
674 int max_lines, struct disasm_line *queue)
675 {
676 static const char *prev_line;
677 static const char *prev_color;
678
679 if (dl->offset != -1) {
680 const char *path = NULL;
681 double percent, max_percent = 0.0;
682 double *ppercents = &percent;
683 int i, nr_percent = 1;
684 const char *color;
685 struct annotation *notes = symbol__annotation(sym);
686 s64 offset = dl->offset;
687 const u64 addr = start + offset;
688 struct disasm_line *next;
689
690 next = disasm__get_next_ip_line(&notes->src->source, dl);
691
692 if (perf_evsel__is_group_event(evsel)) {
693 nr_percent = evsel->nr_members;
694 ppercents = calloc(nr_percent, sizeof(double));
695 if (ppercents == NULL)
696 return -1;
697 }
698
699 for (i = 0; i < nr_percent; i++) {
700 percent = disasm__calc_percent(notes,
701 notes->src->lines ? i : evsel->idx + i,
702 offset,
703 next ? next->offset : (s64) len,
704 &path);
705
706 ppercents[i] = percent;
707 if (percent > max_percent)
708 max_percent = percent;
709 }
710
711 if (max_percent < min_pcnt)
712 return -1;
713
714 if (max_lines && printed >= max_lines)
715 return 1;
716
717 if (queue != NULL) {
718 list_for_each_entry_from(queue, &notes->src->source, node) {
719 if (queue == dl)
720 break;
721 disasm_line__print(queue, sym, start, evsel, len,
722 0, 0, 1, NULL);
723 }
724 }
725
726 color = get_percent_color(max_percent);
727
728 /*
729 * Also color the filename and line if needed, with
730 * the same color than the percentage. Don't print it
731 * twice for close colored addr with the same filename:line
732 */
733 if (path) {
734 if (!prev_line || strcmp(prev_line, path)
735 || color != prev_color) {
736 color_fprintf(stdout, color, " %s", path);
737 prev_line = path;
738 prev_color = color;
739 }
740 }
741
742 for (i = 0; i < nr_percent; i++) {
743 percent = ppercents[i];
744 color = get_percent_color(percent);
745 color_fprintf(stdout, color, " %7.2f", percent);
746 }
747
748 printf(" : ");
749 color_fprintf(stdout, PERF_COLOR_MAGENTA, " %" PRIx64 ":", addr);
750 color_fprintf(stdout, PERF_COLOR_BLUE, "%s\n", dl->line);
751
752 if (ppercents != &percent)
753 free(ppercents);
754
755 } else if (max_lines && printed >= max_lines)
756 return 1;
757 else {
758 int width = 8;
759
760 if (queue)
761 return -1;
762
763 if (perf_evsel__is_group_event(evsel))
764 width *= evsel->nr_members;
765
766 if (!*dl->line)
767 printf(" %*s:\n", width, " ");
768 else
769 printf(" %*s: %s\n", width, " ", dl->line);
770 }
771
772 return 0;
773 }
774
775 /*
776 * symbol__parse_objdump_line() parses objdump output (with -d --no-show-raw)
777 * which looks like following
778 *
779 * 0000000000415500 <_init>:
780 * 415500: sub $0x8,%rsp
781 * 415504: mov 0x2f5ad5(%rip),%rax # 70afe0 <_DYNAMIC+0x2f8>
782 * 41550b: test %rax,%rax
783 * 41550e: je 415515 <_init+0x15>
784 * 415510: callq 416e70 <__gmon_start__@plt>
785 * 415515: add $0x8,%rsp
786 * 415519: retq
787 *
788 * it will be parsed and saved into struct disasm_line as
789 * <offset> <name> <ops.raw>
790 *
791 * The offset will be a relative offset from the start of the symbol and -1
792 * means that it's not a disassembly line so should be treated differently.
793 * The ops.raw part will be parsed further according to type of the instruction.
794 */
795 static int symbol__parse_objdump_line(struct symbol *sym, struct map *map,
796 FILE *file, size_t privsize,
797 int *line_nr)
798 {
799 struct annotation *notes = symbol__annotation(sym);
800 struct disasm_line *dl;
801 char *line = NULL, *parsed_line, *tmp, *tmp2, *c;
802 size_t line_len;
803 s64 line_ip, offset = -1;
804 regmatch_t match[2];
805
806 if (getline(&line, &line_len, file) < 0)
807 return -1;
808
809 if (!line)
810 return -1;
811
812 while (line_len != 0 && isspace(line[line_len - 1]))
813 line[--line_len] = '\0';
814
815 c = strchr(line, '\n');
816 if (c)
817 *c = 0;
818
819 line_ip = -1;
820 parsed_line = line;
821
822 /* /filename:linenr ? Save line number and ignore. */
823 if (regexec(&file_lineno, line, 2, match, 0) == 0) {
824 *line_nr = atoi(line + match[1].rm_so);
825 return 0;
826 }
827
828 /*
829 * Strip leading spaces:
830 */
831 tmp = line;
832 while (*tmp) {
833 if (*tmp != ' ')
834 break;
835 tmp++;
836 }
837
838 if (*tmp) {
839 /*
840 * Parse hexa addresses followed by ':'
841 */
842 line_ip = strtoull(tmp, &tmp2, 16);
843 if (*tmp2 != ':' || tmp == tmp2 || tmp2[1] == '\0')
844 line_ip = -1;
845 }
846
847 if (line_ip != -1) {
848 u64 start = map__rip_2objdump(map, sym->start),
849 end = map__rip_2objdump(map, sym->end);
850
851 offset = line_ip - start;
852 if ((u64)line_ip < start || (u64)line_ip >= end)
853 offset = -1;
854 else
855 parsed_line = tmp2 + 1;
856 }
857
858 dl = disasm_line__new(offset, parsed_line, privsize, *line_nr);
859 free(line);
860 (*line_nr)++;
861
862 if (dl == NULL)
863 return -1;
864
865 if (dl->ops.target.offset == UINT64_MAX)
866 dl->ops.target.offset = dl->ops.target.addr -
867 map__rip_2objdump(map, sym->start);
868
869 /* kcore has no symbols, so add the call target name */
870 if (dl->ins && ins__is_call(dl->ins) && !dl->ops.target.name) {
871 struct addr_map_symbol target = {
872 .map = map,
873 .addr = dl->ops.target.addr,
874 };
875
876 if (!map_groups__find_ams(&target, NULL) &&
877 target.sym->start == target.al_addr)
878 dl->ops.target.name = strdup(target.sym->name);
879 }
880
881 disasm__add(&notes->src->source, dl);
882
883 return 0;
884 }
885
886 static __attribute__((constructor)) void symbol__init_regexpr(void)
887 {
888 regcomp(&file_lineno, "^/[^:]+:([0-9]+)", REG_EXTENDED);
889 }
890
891 static void delete_last_nop(struct symbol *sym)
892 {
893 struct annotation *notes = symbol__annotation(sym);
894 struct list_head *list = &notes->src->source;
895 struct disasm_line *dl;
896
897 while (!list_empty(list)) {
898 dl = list_entry(list->prev, struct disasm_line, node);
899
900 if (dl->ins && dl->ins->ops) {
901 if (dl->ins->ops != &nop_ops)
902 return;
903 } else {
904 if (!strstr(dl->line, " nop ") &&
905 !strstr(dl->line, " nopl ") &&
906 !strstr(dl->line, " nopw "))
907 return;
908 }
909
910 list_del(&dl->node);
911 disasm_line__free(dl);
912 }
913 }
914
915 int symbol__annotate(struct symbol *sym, struct map *map, size_t privsize)
916 {
917 struct dso *dso = map->dso;
918 char *filename = dso__build_id_filename(dso, NULL, 0);
919 bool free_filename = true;
920 char command[PATH_MAX * 2];
921 FILE *file;
922 int err = 0;
923 char symfs_filename[PATH_MAX];
924 struct kcore_extract kce;
925 bool delete_extract = false;
926 int lineno = 0;
927
928 if (filename)
929 symbol__join_symfs(symfs_filename, filename);
930
931 if (filename == NULL) {
932 if (dso->has_build_id) {
933 pr_err("Can't annotate %s: not enough memory\n",
934 sym->name);
935 return -ENOMEM;
936 }
937 goto fallback;
938 } else if (dso__is_kcore(dso)) {
939 goto fallback;
940 } else if (readlink(symfs_filename, command, sizeof(command)) < 0 ||
941 strstr(command, "[kernel.kallsyms]") ||
942 access(symfs_filename, R_OK)) {
943 free(filename);
944 fallback:
945 /*
946 * If we don't have build-ids or the build-id file isn't in the
947 * cache, or is just a kallsyms file, well, lets hope that this
948 * DSO is the same as when 'perf record' ran.
949 */
950 filename = (char *)dso->long_name;
951 symbol__join_symfs(symfs_filename, filename);
952 free_filename = false;
953 }
954
955 if (dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS &&
956 !dso__is_kcore(dso)) {
957 char bf[BUILD_ID_SIZE * 2 + 16] = " with build id ";
958 char *build_id_msg = NULL;
959
960 if (dso->annotate_warned)
961 goto out_free_filename;
962
963 if (dso->has_build_id) {
964 build_id__sprintf(dso->build_id,
965 sizeof(dso->build_id), bf + 15);
966 build_id_msg = bf;
967 }
968 err = -ENOENT;
969 dso->annotate_warned = 1;
970 pr_err("Can't annotate %s:\n\n"
971 "No vmlinux file%s\nwas found in the path.\n\n"
972 "Please use:\n\n"
973 " perf buildid-cache -vu vmlinux\n\n"
974 "or:\n\n"
975 " --vmlinux vmlinux\n",
976 sym->name, build_id_msg ?: "");
977 goto out_free_filename;
978 }
979
980 pr_debug("%s: filename=%s, sym=%s, start=%#" PRIx64 ", end=%#" PRIx64 "\n", __func__,
981 filename, sym->name, map->unmap_ip(map, sym->start),
982 map->unmap_ip(map, sym->end));
983
984 pr_debug("annotating [%p] %30s : [%p] %30s\n",
985 dso, dso->long_name, sym, sym->name);
986
987 if (dso__is_kcore(dso)) {
988 kce.kcore_filename = symfs_filename;
989 kce.addr = map__rip_2objdump(map, sym->start);
990 kce.offs = sym->start;
991 kce.len = sym->end - sym->start;
992 if (!kcore_extract__create(&kce)) {
993 delete_extract = true;
994 strlcpy(symfs_filename, kce.extract_filename,
995 sizeof(symfs_filename));
996 if (free_filename) {
997 free(filename);
998 free_filename = false;
999 }
1000 filename = symfs_filename;
1001 }
1002 }
1003
1004 snprintf(command, sizeof(command),
1005 "%s %s%s --start-address=0x%016" PRIx64
1006 " --stop-address=0x%016" PRIx64
1007 " -l -d %s %s -C %s 2>/dev/null|grep -v %s|expand",
1008 objdump_path ? objdump_path : "objdump",
1009 disassembler_style ? "-M " : "",
1010 disassembler_style ? disassembler_style : "",
1011 map__rip_2objdump(map, sym->start),
1012 map__rip_2objdump(map, sym->end),
1013 symbol_conf.annotate_asm_raw ? "" : "--no-show-raw",
1014 symbol_conf.annotate_src ? "-S" : "",
1015 symfs_filename, filename);
1016
1017 pr_debug("Executing: %s\n", command);
1018
1019 file = popen(command, "r");
1020 if (!file)
1021 goto out_free_filename;
1022
1023 while (!feof(file))
1024 if (symbol__parse_objdump_line(sym, map, file, privsize,
1025 &lineno) < 0)
1026 break;
1027
1028 /*
1029 * kallsyms does not have symbol sizes so there may a nop at the end.
1030 * Remove it.
1031 */
1032 if (dso__is_kcore(dso))
1033 delete_last_nop(sym);
1034
1035 pclose(file);
1036 out_free_filename:
1037 if (delete_extract)
1038 kcore_extract__delete(&kce);
1039 if (free_filename)
1040 free(filename);
1041 return err;
1042 }
1043
1044 static void insert_source_line(struct rb_root *root, struct source_line *src_line)
1045 {
1046 struct source_line *iter;
1047 struct rb_node **p = &root->rb_node;
1048 struct rb_node *parent = NULL;
1049 int i, ret;
1050
1051 while (*p != NULL) {
1052 parent = *p;
1053 iter = rb_entry(parent, struct source_line, node);
1054
1055 ret = strcmp(iter->path, src_line->path);
1056 if (ret == 0) {
1057 for (i = 0; i < src_line->nr_pcnt; i++)
1058 iter->p[i].percent_sum += src_line->p[i].percent;
1059 return;
1060 }
1061
1062 if (ret < 0)
1063 p = &(*p)->rb_left;
1064 else
1065 p = &(*p)->rb_right;
1066 }
1067
1068 for (i = 0; i < src_line->nr_pcnt; i++)
1069 src_line->p[i].percent_sum = src_line->p[i].percent;
1070
1071 rb_link_node(&src_line->node, parent, p);
1072 rb_insert_color(&src_line->node, root);
1073 }
1074
1075 static int cmp_source_line(struct source_line *a, struct source_line *b)
1076 {
1077 int i;
1078
1079 for (i = 0; i < a->nr_pcnt; i++) {
1080 if (a->p[i].percent_sum == b->p[i].percent_sum)
1081 continue;
1082 return a->p[i].percent_sum > b->p[i].percent_sum;
1083 }
1084
1085 return 0;
1086 }
1087
1088 static void __resort_source_line(struct rb_root *root, struct source_line *src_line)
1089 {
1090 struct source_line *iter;
1091 struct rb_node **p = &root->rb_node;
1092 struct rb_node *parent = NULL;
1093
1094 while (*p != NULL) {
1095 parent = *p;
1096 iter = rb_entry(parent, struct source_line, node);
1097
1098 if (cmp_source_line(src_line, iter))
1099 p = &(*p)->rb_left;
1100 else
1101 p = &(*p)->rb_right;
1102 }
1103
1104 rb_link_node(&src_line->node, parent, p);
1105 rb_insert_color(&src_line->node, root);
1106 }
1107
1108 static void resort_source_line(struct rb_root *dest_root, struct rb_root *src_root)
1109 {
1110 struct source_line *src_line;
1111 struct rb_node *node;
1112
1113 node = rb_first(src_root);
1114 while (node) {
1115 struct rb_node *next;
1116
1117 src_line = rb_entry(node, struct source_line, node);
1118 next = rb_next(node);
1119 rb_erase(node, src_root);
1120
1121 __resort_source_line(dest_root, src_line);
1122 node = next;
1123 }
1124 }
1125
1126 static void symbol__free_source_line(struct symbol *sym, int len)
1127 {
1128 struct annotation *notes = symbol__annotation(sym);
1129 struct source_line *src_line = notes->src->lines;
1130 size_t sizeof_src_line;
1131 int i;
1132
1133 sizeof_src_line = sizeof(*src_line) +
1134 (sizeof(src_line->p) * (src_line->nr_pcnt - 1));
1135
1136 for (i = 0; i < len; i++) {
1137 free_srcline(src_line->path);
1138 src_line = (void *)src_line + sizeof_src_line;
1139 }
1140
1141 zfree(&notes->src->lines);
1142 }
1143
1144 /* Get the filename:line for the colored entries */
1145 static int symbol__get_source_line(struct symbol *sym, struct map *map,
1146 struct perf_evsel *evsel,
1147 struct rb_root *root, int len)
1148 {
1149 u64 start;
1150 int i, k;
1151 int evidx = evsel->idx;
1152 struct source_line *src_line;
1153 struct annotation *notes = symbol__annotation(sym);
1154 struct sym_hist *h = annotation__histogram(notes, evidx);
1155 struct rb_root tmp_root = RB_ROOT;
1156 int nr_pcnt = 1;
1157 u64 h_sum = h->sum;
1158 size_t sizeof_src_line = sizeof(struct source_line);
1159
1160 if (perf_evsel__is_group_event(evsel)) {
1161 for (i = 1; i < evsel->nr_members; i++) {
1162 h = annotation__histogram(notes, evidx + i);
1163 h_sum += h->sum;
1164 }
1165 nr_pcnt = evsel->nr_members;
1166 sizeof_src_line += (nr_pcnt - 1) * sizeof(src_line->p);
1167 }
1168
1169 if (!h_sum)
1170 return 0;
1171
1172 src_line = notes->src->lines = calloc(len, sizeof_src_line);
1173 if (!notes->src->lines)
1174 return -1;
1175
1176 start = map__rip_2objdump(map, sym->start);
1177
1178 for (i = 0; i < len; i++) {
1179 u64 offset;
1180 double percent_max = 0.0;
1181
1182 src_line->nr_pcnt = nr_pcnt;
1183
1184 for (k = 0; k < nr_pcnt; k++) {
1185 h = annotation__histogram(notes, evidx + k);
1186 src_line->p[k].percent = 100.0 * h->addr[i] / h->sum;
1187
1188 if (src_line->p[k].percent > percent_max)
1189 percent_max = src_line->p[k].percent;
1190 }
1191
1192 if (percent_max <= 0.5)
1193 goto next;
1194
1195 offset = start + i;
1196 src_line->path = get_srcline(map->dso, offset, NULL, false);
1197 insert_source_line(&tmp_root, src_line);
1198
1199 next:
1200 src_line = (void *)src_line + sizeof_src_line;
1201 }
1202
1203 resort_source_line(root, &tmp_root);
1204 return 0;
1205 }
1206
1207 static void print_summary(struct rb_root *root, const char *filename)
1208 {
1209 struct source_line *src_line;
1210 struct rb_node *node;
1211
1212 printf("\nSorted summary for file %s\n", filename);
1213 printf("----------------------------------------------\n\n");
1214
1215 if (RB_EMPTY_ROOT(root)) {
1216 printf(" Nothing higher than %1.1f%%\n", MIN_GREEN);
1217 return;
1218 }
1219
1220 node = rb_first(root);
1221 while (node) {
1222 double percent, percent_max = 0.0;
1223 const char *color;
1224 char *path;
1225 int i;
1226
1227 src_line = rb_entry(node, struct source_line, node);
1228 for (i = 0; i < src_line->nr_pcnt; i++) {
1229 percent = src_line->p[i].percent_sum;
1230 color = get_percent_color(percent);
1231 color_fprintf(stdout, color, " %7.2f", percent);
1232
1233 if (percent > percent_max)
1234 percent_max = percent;
1235 }
1236
1237 path = src_line->path;
1238 color = get_percent_color(percent_max);
1239 color_fprintf(stdout, color, " %s\n", path);
1240
1241 node = rb_next(node);
1242 }
1243 }
1244
1245 static void symbol__annotate_hits(struct symbol *sym, struct perf_evsel *evsel)
1246 {
1247 struct annotation *notes = symbol__annotation(sym);
1248 struct sym_hist *h = annotation__histogram(notes, evsel->idx);
1249 u64 len = symbol__size(sym), offset;
1250
1251 for (offset = 0; offset < len; ++offset)
1252 if (h->addr[offset] != 0)
1253 printf("%*" PRIx64 ": %" PRIu64 "\n", BITS_PER_LONG / 2,
1254 sym->start + offset, h->addr[offset]);
1255 printf("%*s: %" PRIu64 "\n", BITS_PER_LONG / 2, "h->sum", h->sum);
1256 }
1257
1258 int symbol__annotate_printf(struct symbol *sym, struct map *map,
1259 struct perf_evsel *evsel, bool full_paths,
1260 int min_pcnt, int max_lines, int context)
1261 {
1262 struct dso *dso = map->dso;
1263 char *filename;
1264 const char *d_filename;
1265 const char *evsel_name = perf_evsel__name(evsel);
1266 struct annotation *notes = symbol__annotation(sym);
1267 struct disasm_line *pos, *queue = NULL;
1268 u64 start = map__rip_2objdump(map, sym->start);
1269 int printed = 2, queue_len = 0;
1270 int more = 0;
1271 u64 len;
1272 int width = 8;
1273 int namelen, evsel_name_len, graph_dotted_len;
1274
1275 filename = strdup(dso->long_name);
1276 if (!filename)
1277 return -ENOMEM;
1278
1279 if (full_paths)
1280 d_filename = filename;
1281 else
1282 d_filename = basename(filename);
1283
1284 len = symbol__size(sym);
1285 namelen = strlen(d_filename);
1286 evsel_name_len = strlen(evsel_name);
1287
1288 if (perf_evsel__is_group_event(evsel))
1289 width *= evsel->nr_members;
1290
1291 printf(" %-*.*s| Source code & Disassembly of %s for %s\n",
1292 width, width, "Percent", d_filename, evsel_name);
1293
1294 graph_dotted_len = width + namelen + evsel_name_len;
1295 printf("-%-*.*s-----------------------------------------\n",
1296 graph_dotted_len, graph_dotted_len, graph_dotted_line);
1297
1298 if (verbose)
1299 symbol__annotate_hits(sym, evsel);
1300
1301 list_for_each_entry(pos, &notes->src->source, node) {
1302 if (context && queue == NULL) {
1303 queue = pos;
1304 queue_len = 0;
1305 }
1306
1307 switch (disasm_line__print(pos, sym, start, evsel, len,
1308 min_pcnt, printed, max_lines,
1309 queue)) {
1310 case 0:
1311 ++printed;
1312 if (context) {
1313 printed += queue_len;
1314 queue = NULL;
1315 queue_len = 0;
1316 }
1317 break;
1318 case 1:
1319 /* filtered by max_lines */
1320 ++more;
1321 break;
1322 case -1:
1323 default:
1324 /*
1325 * Filtered by min_pcnt or non IP lines when
1326 * context != 0
1327 */
1328 if (!context)
1329 break;
1330 if (queue_len == context)
1331 queue = list_entry(queue->node.next, typeof(*queue), node);
1332 else
1333 ++queue_len;
1334 break;
1335 }
1336 }
1337
1338 free(filename);
1339
1340 return more;
1341 }
1342
1343 void symbol__annotate_zero_histogram(struct symbol *sym, int evidx)
1344 {
1345 struct annotation *notes = symbol__annotation(sym);
1346 struct sym_hist *h = annotation__histogram(notes, evidx);
1347
1348 memset(h, 0, notes->src->sizeof_sym_hist);
1349 }
1350
1351 void symbol__annotate_decay_histogram(struct symbol *sym, int evidx)
1352 {
1353 struct annotation *notes = symbol__annotation(sym);
1354 struct sym_hist *h = annotation__histogram(notes, evidx);
1355 int len = symbol__size(sym), offset;
1356
1357 h->sum = 0;
1358 for (offset = 0; offset < len; ++offset) {
1359 h->addr[offset] = h->addr[offset] * 7 / 8;
1360 h->sum += h->addr[offset];
1361 }
1362 }
1363
1364 void disasm__purge(struct list_head *head)
1365 {
1366 struct disasm_line *pos, *n;
1367
1368 list_for_each_entry_safe(pos, n, head, node) {
1369 list_del(&pos->node);
1370 disasm_line__free(pos);
1371 }
1372 }
1373
1374 static size_t disasm_line__fprintf(struct disasm_line *dl, FILE *fp)
1375 {
1376 size_t printed;
1377
1378 if (dl->offset == -1)
1379 return fprintf(fp, "%s\n", dl->line);
1380
1381 printed = fprintf(fp, "%#" PRIx64 " %s", dl->offset, dl->name);
1382
1383 if (dl->ops.raw[0] != '\0') {
1384 printed += fprintf(fp, "%.*s %s\n", 6 - (int)printed, " ",
1385 dl->ops.raw);
1386 }
1387
1388 return printed + fprintf(fp, "\n");
1389 }
1390
1391 size_t disasm__fprintf(struct list_head *head, FILE *fp)
1392 {
1393 struct disasm_line *pos;
1394 size_t printed = 0;
1395
1396 list_for_each_entry(pos, head, node)
1397 printed += disasm_line__fprintf(pos, fp);
1398
1399 return printed;
1400 }
1401
1402 int symbol__tty_annotate(struct symbol *sym, struct map *map,
1403 struct perf_evsel *evsel, bool print_lines,
1404 bool full_paths, int min_pcnt, int max_lines)
1405 {
1406 struct dso *dso = map->dso;
1407 struct rb_root source_line = RB_ROOT;
1408 u64 len;
1409
1410 if (symbol__annotate(sym, map, 0) < 0)
1411 return -1;
1412
1413 len = symbol__size(sym);
1414
1415 if (print_lines) {
1416 symbol__get_source_line(sym, map, evsel, &source_line, len);
1417 print_summary(&source_line, dso->long_name);
1418 }
1419
1420 symbol__annotate_printf(sym, map, evsel, full_paths,
1421 min_pcnt, max_lines, 0);
1422 if (print_lines)
1423 symbol__free_source_line(sym, len);
1424
1425 disasm__purge(&symbol__annotation(sym)->src->source);
1426
1427 return 0;
1428 }
1429
1430 int hist_entry__annotate(struct hist_entry *he, size_t privsize)
1431 {
1432 return symbol__annotate(he->ms.sym, he->ms.map, privsize);
1433 }
1434
1435 bool ui__has_annotation(void)
1436 {
1437 return use_browser == 1 && sort__has_sym;
1438 }
Linux kernel - Deliverables
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