projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'x86-reboot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[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 "build-id.h"
12 #include "color.h"
13 #include "cache.h"
14 #include "symbol.h"
15 #include "debug.h"
16 #include "annotate.h"
17 #include "evsel.h"
18 #include <pthread.h>
19 #include <linux/bitops.h>
20
21 const char *disassembler_style;
22 const char *objdump_path;
23
24 static struct ins *ins__find(const char *name);
25 static int disasm_line__parse(char *line, char **namep, char **rawp);
26
27 static void ins__delete(struct ins_operands *ops)
28 {
29 free(ops->source.raw);
30 free(ops->source.name);
31 free(ops->target.raw);
32 free(ops->target.name);
33 }
34
35 static int ins__raw_scnprintf(struct ins *ins, char *bf, size_t size,
36 struct ins_operands *ops)
37 {
38 return scnprintf(bf, size, "%-6.6s %s", ins->name, ops->raw);
39 }
40
41 int ins__scnprintf(struct ins *ins, char *bf, size_t size,
42 struct ins_operands *ops)
43 {
44 if (ins->ops->scnprintf)
45 return ins->ops->scnprintf(ins, bf, size, ops);
46
47 return ins__raw_scnprintf(ins, bf, size, ops);
48 }
49
50 static int call__parse(struct ins_operands *ops)
51 {
52 char *endptr, *tok, *name;
53
54 ops->target.addr = strtoull(ops->raw, &endptr, 16);
55
56 name = strchr(endptr, '<');
57 if (name == NULL)
58 goto indirect_call;
59
60 name++;
61
62 tok = strchr(name, '>');
63 if (tok == NULL)
64 return -1;
65
66 *tok = '\0';
67 ops->target.name = strdup(name);
68 *tok = '>';
69
70 return ops->target.name == NULL ? -1 : 0;
71
72 indirect_call:
73 tok = strchr(endptr, '(');
74 if (tok != NULL) {
75 ops->target.addr = 0;
76 return 0;
77 }
78
79 tok = strchr(endptr, '*');
80 if (tok == NULL)
81 return -1;
82
83 ops->target.addr = strtoull(tok + 1, NULL, 16);
84 return 0;
85 }
86
87 static int call__scnprintf(struct ins *ins, char *bf, size_t size,
88 struct ins_operands *ops)
89 {
90 if (ops->target.name)
91 return scnprintf(bf, size, "%-6.6s %s", ins->name, ops->target.name);
92
93 if (ops->target.addr == 0)
94 return ins__raw_scnprintf(ins, bf, size, ops);
95
96 return scnprintf(bf, size, "%-6.6s *%" PRIx64, ins->name, ops->target.addr);
97 }
98
99 static struct ins_ops call_ops = {
100 .parse = call__parse,
101 .scnprintf = call__scnprintf,
102 };
103
104 bool ins__is_call(const struct ins *ins)
105 {
106 return ins->ops == &call_ops;
107 }
108
109 static int jump__parse(struct ins_operands *ops)
110 {
111 const char *s = strchr(ops->raw, '+');
112
113 ops->target.addr = strtoull(ops->raw, NULL, 16);
114
115 if (s++ != NULL)
116 ops->target.offset = strtoull(s, NULL, 16);
117 else
118 ops->target.offset = UINT64_MAX;
119
120 return 0;
121 }
122
123 static int jump__scnprintf(struct ins *ins, char *bf, size_t size,
124 struct ins_operands *ops)
125 {
126 return scnprintf(bf, size, "%-6.6s %" PRIx64, ins->name, ops->target.offset);
127 }
128
129 static struct ins_ops jump_ops = {
130 .parse = jump__parse,
131 .scnprintf = jump__scnprintf,
132 };
133
134 bool ins__is_jump(const struct ins *ins)
135 {
136 return ins->ops == &jump_ops;
137 }
138
139 static int comment__symbol(char *raw, char *comment, u64 *addrp, char **namep)
140 {
141 char *endptr, *name, *t;
142
143 if (strstr(raw, "(%rip)") == NULL)
144 return 0;
145
146 *addrp = strtoull(comment, &endptr, 16);
147 name = strchr(endptr, '<');
148 if (name == NULL)
149 return -1;
150
151 name++;
152
153 t = strchr(name, '>');
154 if (t == NULL)
155 return 0;
156
157 *t = '\0';
158 *namep = strdup(name);
159 *t = '>';
160
161 return 0;
162 }
163
164 static int lock__parse(struct ins_operands *ops)
165 {
166 char *name;
167
168 ops->locked.ops = zalloc(sizeof(*ops->locked.ops));
169 if (ops->locked.ops == NULL)
170 return 0;
171
172 if (disasm_line__parse(ops->raw, &name, &ops->locked.ops->raw) < 0)
173 goto out_free_ops;
174
175 ops->locked.ins = ins__find(name);
176 if (ops->locked.ins == NULL)
177 goto out_free_ops;
178
179 if (!ops->locked.ins->ops)
180 return 0;
181
182 if (ops->locked.ins->ops->parse)
183 ops->locked.ins->ops->parse(ops->locked.ops);
184
185 return 0;
186
187 out_free_ops:
188 free(ops->locked.ops);
189 ops->locked.ops = NULL;
190 return 0;
191 }
192
193 static int lock__scnprintf(struct ins *ins, char *bf, size_t size,
194 struct ins_operands *ops)
195 {
196 int printed;
197
198 if (ops->locked.ins == NULL)
199 return ins__raw_scnprintf(ins, bf, size, ops);
200
201 printed = scnprintf(bf, size, "%-6.6s ", ins->name);
202 return printed + ins__scnprintf(ops->locked.ins, bf + printed,
203 size - printed, ops->locked.ops);
204 }
205
206 static void lock__delete(struct ins_operands *ops)
207 {
208 free(ops->locked.ops);
209 free(ops->target.raw);
210 free(ops->target.name);
211 }
212
213 static struct ins_ops lock_ops = {
214 .free = lock__delete,
215 .parse = lock__parse,
216 .scnprintf = lock__scnprintf,
217 };
218
219 static int mov__parse(struct ins_operands *ops)
220 {
221 char *s = strchr(ops->raw, ','), *target, *comment, prev;
222
223 if (s == NULL)
224 return -1;
225
226 *s = '\0';
227 ops->source.raw = strdup(ops->raw);
228 *s = ',';
229
230 if (ops->source.raw == NULL)
231 return -1;
232
233 target = ++s;
234
235 while (s[0] != '\0' && !isspace(s[0]))
236 ++s;
237 prev = *s;
238 *s = '\0';
239
240 ops->target.raw = strdup(target);
241 *s = prev;
242
243 if (ops->target.raw == NULL)
244 goto out_free_source;
245
246 comment = strchr(s, '#');
247 if (comment == NULL)
248 return 0;
249
250 while (comment[0] != '\0' && isspace(comment[0]))
251 ++comment;
252
253 comment__symbol(ops->source.raw, comment, &ops->source.addr, &ops->source.name);
254 comment__symbol(ops->target.raw, comment, &ops->target.addr, &ops->target.name);
255
256 return 0;
257
258 out_free_source:
259 free(ops->source.raw);
260 ops->source.raw = NULL;
261 return -1;
262 }
263
264 static int mov__scnprintf(struct ins *ins, char *bf, size_t size,
265 struct ins_operands *ops)
266 {
267 return scnprintf(bf, size, "%-6.6s %s,%s", ins->name,
268 ops->source.name ?: ops->source.raw,
269 ops->target.name ?: ops->target.raw);
270 }
271
272 static struct ins_ops mov_ops = {
273 .parse = mov__parse,
274 .scnprintf = mov__scnprintf,
275 };
276
277 static int dec__parse(struct ins_operands *ops)
278 {
279 char *target, *comment, *s, prev;
280
281 target = s = ops->raw;
282
283 while (s[0] != '\0' && !isspace(s[0]))
284 ++s;
285 prev = *s;
286 *s = '\0';
287
288 ops->target.raw = strdup(target);
289 *s = prev;
290
291 if (ops->target.raw == NULL)
292 return -1;
293
294 comment = strchr(s, '#');
295 if (comment == NULL)
296 return 0;
297
298 while (comment[0] != '\0' && isspace(comment[0]))
299 ++comment;
300
301 comment__symbol(ops->target.raw, comment, &ops->target.addr, &ops->target.name);
302
303 return 0;
304 }
305
306 static int dec__scnprintf(struct ins *ins, char *bf, size_t size,
307 struct ins_operands *ops)
308 {
309 return scnprintf(bf, size, "%-6.6s %s", ins->name,
310 ops->target.name ?: ops->target.raw);
311 }
312
313 static struct ins_ops dec_ops = {
314 .parse = dec__parse,
315 .scnprintf = dec__scnprintf,
316 };
317
318 static int nop__scnprintf(struct ins *ins __maybe_unused, char *bf, size_t size,
319 struct ins_operands *ops __maybe_unused)
320 {
321 return scnprintf(bf, size, "%-6.6s", "nop");
322 }
323
324 static struct ins_ops nop_ops = {
325 .scnprintf = nop__scnprintf,
326 };
327
328 /*
329 * Must be sorted by name!
330 */
331 static struct ins instructions[] = {
332 { .name = "add", .ops = &mov_ops, },
333 { .name = "addl", .ops = &mov_ops, },
334 { .name = "addq", .ops = &mov_ops, },
335 { .name = "addw", .ops = &mov_ops, },
336 { .name = "and", .ops = &mov_ops, },
337 { .name = "bts", .ops = &mov_ops, },
338 { .name = "call", .ops = &call_ops, },
339 { .name = "callq", .ops = &call_ops, },
340 { .name = "cmp", .ops = &mov_ops, },
341 { .name = "cmpb", .ops = &mov_ops, },
342 { .name = "cmpl", .ops = &mov_ops, },
343 { .name = "cmpq", .ops = &mov_ops, },
344 { .name = "cmpw", .ops = &mov_ops, },
345 { .name = "cmpxch", .ops = &mov_ops, },
346 { .name = "dec", .ops = &dec_ops, },
347 { .name = "decl", .ops = &dec_ops, },
348 { .name = "imul", .ops = &mov_ops, },
349 { .name = "inc", .ops = &dec_ops, },
350 { .name = "incl", .ops = &dec_ops, },
351 { .name = "ja", .ops = &jump_ops, },
352 { .name = "jae", .ops = &jump_ops, },
353 { .name = "jb", .ops = &jump_ops, },
354 { .name = "jbe", .ops = &jump_ops, },
355 { .name = "jc", .ops = &jump_ops, },
356 { .name = "jcxz", .ops = &jump_ops, },
357 { .name = "je", .ops = &jump_ops, },
358 { .name = "jecxz", .ops = &jump_ops, },
359 { .name = "jg", .ops = &jump_ops, },
360 { .name = "jge", .ops = &jump_ops, },
361 { .name = "jl", .ops = &jump_ops, },
362 { .name = "jle", .ops = &jump_ops, },
363 { .name = "jmp", .ops = &jump_ops, },
364 { .name = "jmpq", .ops = &jump_ops, },
365 { .name = "jna", .ops = &jump_ops, },
366 { .name = "jnae", .ops = &jump_ops, },
367 { .name = "jnb", .ops = &jump_ops, },
368 { .name = "jnbe", .ops = &jump_ops, },
369 { .name = "jnc", .ops = &jump_ops, },
370 { .name = "jne", .ops = &jump_ops, },
371 { .name = "jng", .ops = &jump_ops, },
372 { .name = "jnge", .ops = &jump_ops, },
373 { .name = "jnl", .ops = &jump_ops, },
374 { .name = "jnle", .ops = &jump_ops, },
375 { .name = "jno", .ops = &jump_ops, },
376 { .name = "jnp", .ops = &jump_ops, },
377 { .name = "jns", .ops = &jump_ops, },
378 { .name = "jnz", .ops = &jump_ops, },
379 { .name = "jo", .ops = &jump_ops, },
380 { .name = "jp", .ops = &jump_ops, },
381 { .name = "jpe", .ops = &jump_ops, },
382 { .name = "jpo", .ops = &jump_ops, },
383 { .name = "jrcxz", .ops = &jump_ops, },
384 { .name = "js", .ops = &jump_ops, },
385 { .name = "jz", .ops = &jump_ops, },
386 { .name = "lea", .ops = &mov_ops, },
387 { .name = "lock", .ops = &lock_ops, },
388 { .name = "mov", .ops = &mov_ops, },
389 { .name = "movb", .ops = &mov_ops, },
390 { .name = "movdqa",.ops = &mov_ops, },
391 { .name = "movl", .ops = &mov_ops, },
392 { .name = "movq", .ops = &mov_ops, },
393 { .name = "movslq", .ops = &mov_ops, },
394 { .name = "movzbl", .ops = &mov_ops, },
395 { .name = "movzwl", .ops = &mov_ops, },
396 { .name = "nop", .ops = &nop_ops, },
397 { .name = "nopl", .ops = &nop_ops, },
398 { .name = "nopw", .ops = &nop_ops, },
399 { .name = "or", .ops = &mov_ops, },
400 { .name = "orl", .ops = &mov_ops, },
401 { .name = "test", .ops = &mov_ops, },
402 { .name = "testb", .ops = &mov_ops, },
403 { .name = "testl", .ops = &mov_ops, },
404 { .name = "xadd", .ops = &mov_ops, },
405 { .name = "xbeginl", .ops = &jump_ops, },
406 { .name = "xbeginq", .ops = &jump_ops, },
407 };
408
409 static int ins__cmp(const void *name, const void *insp)
410 {
411 const struct ins *ins = insp;
412
413 return strcmp(name, ins->name);
414 }
415
416 static struct ins *ins__find(const char *name)
417 {
418 const int nmemb = ARRAY_SIZE(instructions);
419
420 return bsearch(name, instructions, nmemb, sizeof(struct ins), ins__cmp);
421 }
422
423 int symbol__annotate_init(struct map *map __maybe_unused, struct symbol *sym)
424 {
425 struct annotation *notes = symbol__annotation(sym);
426 pthread_mutex_init(&notes->lock, NULL);
427 return 0;
428 }
429
430 int symbol__alloc_hist(struct symbol *sym)
431 {
432 struct annotation *notes = symbol__annotation(sym);
433 const size_t size = symbol__size(sym);
434 size_t sizeof_sym_hist;
435
436 /* Check for overflow when calculating sizeof_sym_hist */
437 if (size > (SIZE_MAX - sizeof(struct sym_hist)) / sizeof(u64))
438 return -1;
439
440 sizeof_sym_hist = (sizeof(struct sym_hist) + size * sizeof(u64));
441
442 /* Check for overflow in zalloc argument */
443 if (sizeof_sym_hist > (SIZE_MAX - sizeof(*notes->src))
444 / symbol_conf.nr_events)
445 return -1;
446
447 notes->src = zalloc(sizeof(*notes->src) + symbol_conf.nr_events * sizeof_sym_hist);
448 if (notes->src == NULL)
449 return -1;
450 notes->src->sizeof_sym_hist = sizeof_sym_hist;
451 notes->src->nr_histograms = symbol_conf.nr_events;
452 INIT_LIST_HEAD(&notes->src->source);
453 return 0;
454 }
455
456 void symbol__annotate_zero_histograms(struct symbol *sym)
457 {
458 struct annotation *notes = symbol__annotation(sym);
459
460 pthread_mutex_lock(&notes->lock);
461 if (notes->src != NULL)
462 memset(notes->src->histograms, 0,
463 notes->src->nr_histograms * notes->src->sizeof_sym_hist);
464 pthread_mutex_unlock(&notes->lock);
465 }
466
467 int symbol__inc_addr_samples(struct symbol *sym, struct map *map,
468 int evidx, u64 addr)
469 {
470 unsigned offset;
471 struct annotation *notes;
472 struct sym_hist *h;
473
474 notes = symbol__annotation(sym);
475 if (notes->src == NULL)
476 return -ENOMEM;
477
478 pr_debug3("%s: addr=%#" PRIx64 "\n", __func__, map->unmap_ip(map, addr));
479
480 if (addr < sym->start || addr > sym->end)
481 return -ERANGE;
482
483 offset = addr - sym->start;
484 h = annotation__histogram(notes, evidx);
485 h->sum++;
486 h->addr[offset]++;
487
488 pr_debug3("%#" PRIx64 " %s: period++ [addr: %#" PRIx64 ", %#" PRIx64
489 ", evidx=%d] => %" PRIu64 "\n", sym->start, sym->name,
490 addr, addr - sym->start, evidx, h->addr[offset]);
491 return 0;
492 }
493
494 static void disasm_line__init_ins(struct disasm_line *dl)
495 {
496 dl->ins = ins__find(dl->name);
497
498 if (dl->ins == NULL)
499 return;
500
501 if (!dl->ins->ops)
502 return;
503
504 if (dl->ins->ops->parse)
505 dl->ins->ops->parse(&dl->ops);
506 }
507
508 static int disasm_line__parse(char *line, char **namep, char **rawp)
509 {
510 char *name = line, tmp;
511
512 while (isspace(name[0]))
513 ++name;
514
515 if (name[0] == '\0')
516 return -1;
517
518 *rawp = name + 1;
519
520 while ((*rawp)[0] != '\0' && !isspace((*rawp)[0]))
521 ++*rawp;
522
523 tmp = (*rawp)[0];
524 (*rawp)[0] = '\0';
525 *namep = strdup(name);
526
527 if (*namep == NULL)
528 goto out_free_name;
529
530 (*rawp)[0] = tmp;
531
532 if ((*rawp)[0] != '\0') {
533 (*rawp)++;
534 while (isspace((*rawp)[0]))
535 ++(*rawp);
536 }
537
538 return 0;
539
540 out_free_name:
541 free(*namep);
542 *namep = NULL;
543 return -1;
544 }
545
546 static struct disasm_line *disasm_line__new(s64 offset, char *line, size_t privsize)
547 {
548 struct disasm_line *dl = zalloc(sizeof(*dl) + privsize);
549
550 if (dl != NULL) {
551 dl->offset = offset;
552 dl->line = strdup(line);
553 if (dl->line == NULL)
554 goto out_delete;
555
556 if (offset != -1) {
557 if (disasm_line__parse(dl->line, &dl->name, &dl->ops.raw) < 0)
558 goto out_free_line;
559
560 disasm_line__init_ins(dl);
561 }
562 }
563
564 return dl;
565
566 out_free_line:
567 free(dl->line);
568 out_delete:
569 free(dl);
570 return NULL;
571 }
572
573 void disasm_line__free(struct disasm_line *dl)
574 {
575 free(dl->line);
576 free(dl->name);
577 if (dl->ins && dl->ins->ops->free)
578 dl->ins->ops->free(&dl->ops);
579 else
580 ins__delete(&dl->ops);
581 free(dl);
582 }
583
584 int disasm_line__scnprintf(struct disasm_line *dl, char *bf, size_t size, bool raw)
585 {
586 if (raw || !dl->ins)
587 return scnprintf(bf, size, "%-6.6s %s", dl->name, dl->ops.raw);
588
589 return ins__scnprintf(dl->ins, bf, size, &dl->ops);
590 }
591
592 static void disasm__add(struct list_head *head, struct disasm_line *line)
593 {
594 list_add_tail(&line->node, head);
595 }
596
597 struct disasm_line *disasm__get_next_ip_line(struct list_head *head, struct disasm_line *pos)
598 {
599 list_for_each_entry_continue(pos, head, node)
600 if (pos->offset >= 0)
601 return pos;
602
603 return NULL;
604 }
605
606 double disasm__calc_percent(struct annotation *notes, int evidx, s64 offset,
607 s64 end, const char **path)
608 {
609 struct source_line *src_line = notes->src->lines;
610 double percent = 0.0;
611
612 if (src_line) {
613 size_t sizeof_src_line = sizeof(*src_line) +
614 sizeof(src_line->p) * (src_line->nr_pcnt - 1);
615
616 while (offset < end) {
617 src_line = (void *)notes->src->lines +
618 (sizeof_src_line * offset);
619
620 if (*path == NULL)
621 *path = src_line->path;
622
623 percent += src_line->p[evidx].percent;
624 offset++;
625 }
626 } else {
627 struct sym_hist *h = annotation__histogram(notes, evidx);
628 unsigned int hits = 0;
629
630 while (offset < end)
631 hits += h->addr[offset++];
632
633 if (h->sum)
634 percent = 100.0 * hits / h->sum;
635 }
636
637 return percent;
638 }
639
640 static int disasm_line__print(struct disasm_line *dl, struct symbol *sym, u64 start,
641 struct perf_evsel *evsel, u64 len, int min_pcnt, int printed,
642 int max_lines, struct disasm_line *queue)
643 {
644 static const char *prev_line;
645 static const char *prev_color;
646
647 if (dl->offset != -1) {
648 const char *path = NULL;
649 double percent, max_percent = 0.0;
650 double *ppercents = &percent;
651 int i, nr_percent = 1;
652 const char *color;
653 struct annotation *notes = symbol__annotation(sym);
654 s64 offset = dl->offset;
655 const u64 addr = start + offset;
656 struct disasm_line *next;
657
658 next = disasm__get_next_ip_line(&notes->src->source, dl);
659
660 if (perf_evsel__is_group_event(evsel)) {
661 nr_percent = evsel->nr_members;
662 ppercents = calloc(nr_percent, sizeof(double));
663 if (ppercents == NULL)
664 return -1;
665 }
666
667 for (i = 0; i < nr_percent; i++) {
668 percent = disasm__calc_percent(notes,
669 notes->src->lines ? i : evsel->idx + i,
670 offset,
671 next ? next->offset : (s64) len,
672 &path);
673
674 ppercents[i] = percent;
675 if (percent > max_percent)
676 max_percent = percent;
677 }
678
679 if (max_percent < min_pcnt)
680 return -1;
681
682 if (max_lines && printed >= max_lines)
683 return 1;
684
685 if (queue != NULL) {
686 list_for_each_entry_from(queue, &notes->src->source, node) {
687 if (queue == dl)
688 break;
689 disasm_line__print(queue, sym, start, evsel, len,
690 0, 0, 1, NULL);
691 }
692 }
693
694 color = get_percent_color(max_percent);
695
696 /*
697 * Also color the filename and line if needed, with
698 * the same color than the percentage. Don't print it
699 * twice for close colored addr with the same filename:line
700 */
701 if (path) {
702 if (!prev_line || strcmp(prev_line, path)
703 || color != prev_color) {
704 color_fprintf(stdout, color, " %s", path);
705 prev_line = path;
706 prev_color = color;
707 }
708 }
709
710 for (i = 0; i < nr_percent; i++) {
711 percent = ppercents[i];
712 color = get_percent_color(percent);
713 color_fprintf(stdout, color, " %7.2f", percent);
714 }
715
716 printf(" : ");
717 color_fprintf(stdout, PERF_COLOR_MAGENTA, " %" PRIx64 ":", addr);
718 color_fprintf(stdout, PERF_COLOR_BLUE, "%s\n", dl->line);
719
720 if (ppercents != &percent)
721 free(ppercents);
722
723 } else if (max_lines && printed >= max_lines)
724 return 1;
725 else {
726 int width = 8;
727
728 if (queue)
729 return -1;
730
731 if (perf_evsel__is_group_event(evsel))
732 width *= evsel->nr_members;
733
734 if (!*dl->line)
735 printf(" %*s:\n", width, " ");
736 else
737 printf(" %*s: %s\n", width, " ", dl->line);
738 }
739
740 return 0;
741 }
742
743 /*
744 * symbol__parse_objdump_line() parses objdump output (with -d --no-show-raw)
745 * which looks like following
746 *
747 * 0000000000415500 <_init>:
748 * 415500: sub $0x8,%rsp
749 * 415504: mov 0x2f5ad5(%rip),%rax # 70afe0 <_DYNAMIC+0x2f8>
750 * 41550b: test %rax,%rax
751 * 41550e: je 415515 <_init+0x15>
752 * 415510: callq 416e70 <__gmon_start__@plt>
753 * 415515: add $0x8,%rsp
754 * 415519: retq
755 *
756 * it will be parsed and saved into struct disasm_line as
757 * <offset> <name> <ops.raw>
758 *
759 * The offset will be a relative offset from the start of the symbol and -1
760 * means that it's not a disassembly line so should be treated differently.
761 * The ops.raw part will be parsed further according to type of the instruction.
762 */
763 static int symbol__parse_objdump_line(struct symbol *sym, struct map *map,
764 FILE *file, size_t privsize)
765 {
766 struct annotation *notes = symbol__annotation(sym);
767 struct disasm_line *dl;
768 char *line = NULL, *parsed_line, *tmp, *tmp2, *c;
769 size_t line_len;
770 s64 line_ip, offset = -1;
771
772 if (getline(&line, &line_len, file) < 0)
773 return -1;
774
775 if (!line)
776 return -1;
777
778 while (line_len != 0 && isspace(line[line_len - 1]))
779 line[--line_len] = '\0';
780
781 c = strchr(line, '\n');
782 if (c)
783 *c = 0;
784
785 line_ip = -1;
786 parsed_line = line;
787
788 /*
789 * Strip leading spaces:
790 */
791 tmp = line;
792 while (*tmp) {
793 if (*tmp != ' ')
794 break;
795 tmp++;
796 }
797
798 if (*tmp) {
799 /*
800 * Parse hexa addresses followed by ':'
801 */
802 line_ip = strtoull(tmp, &tmp2, 16);
803 if (*tmp2 != ':' || tmp == tmp2 || tmp2[1] == '\0')
804 line_ip = -1;
805 }
806
807 if (line_ip != -1) {
808 u64 start = map__rip_2objdump(map, sym->start),
809 end = map__rip_2objdump(map, sym->end);
810
811 offset = line_ip - start;
812 if ((u64)line_ip < start || (u64)line_ip > end)
813 offset = -1;
814 else
815 parsed_line = tmp2 + 1;
816 }
817
818 dl = disasm_line__new(offset, parsed_line, privsize);
819 free(line);
820
821 if (dl == NULL)
822 return -1;
823
824 if (dl->ops.target.offset == UINT64_MAX)
825 dl->ops.target.offset = dl->ops.target.addr -
826 map__rip_2objdump(map, sym->start);
827
828 /* kcore has no symbols, so add the call target name */
829 if (dl->ins && ins__is_call(dl->ins) && !dl->ops.target.name) {
830 struct addr_map_symbol target = {
831 .map = map,
832 .addr = dl->ops.target.addr,
833 };
834
835 if (!map_groups__find_ams(&target, NULL) &&
836 target.sym->start == target.al_addr)
837 dl->ops.target.name = strdup(target.sym->name);
838 }
839
840 disasm__add(&notes->src->source, dl);
841
842 return 0;
843 }
844
845 static void delete_last_nop(struct symbol *sym)
846 {
847 struct annotation *notes = symbol__annotation(sym);
848 struct list_head *list = &notes->src->source;
849 struct disasm_line *dl;
850
851 while (!list_empty(list)) {
852 dl = list_entry(list->prev, struct disasm_line, node);
853
854 if (dl->ins && dl->ins->ops) {
855 if (dl->ins->ops != &nop_ops)
856 return;
857 } else {
858 if (!strstr(dl->line, " nop ") &&
859 !strstr(dl->line, " nopl ") &&
860 !strstr(dl->line, " nopw "))
861 return;
862 }
863
864 list_del(&dl->node);
865 disasm_line__free(dl);
866 }
867 }
868
869 int symbol__annotate(struct symbol *sym, struct map *map, size_t privsize)
870 {
871 struct dso *dso = map->dso;
872 char *filename = dso__build_id_filename(dso, NULL, 0);
873 bool free_filename = true;
874 char command[PATH_MAX * 2];
875 FILE *file;
876 int err = 0;
877 char symfs_filename[PATH_MAX];
878 struct kcore_extract kce;
879 bool delete_extract = false;
880
881 if (filename) {
882 snprintf(symfs_filename, sizeof(symfs_filename), "%s%s",
883 symbol_conf.symfs, filename);
884 }
885
886 if (filename == NULL) {
887 if (dso->has_build_id) {
888 pr_err("Can't annotate %s: not enough memory\n",
889 sym->name);
890 return -ENOMEM;
891 }
892 goto fallback;
893 } else if (readlink(symfs_filename, command, sizeof(command)) < 0 ||
894 strstr(command, "[kernel.kallsyms]") ||
895 access(symfs_filename, R_OK)) {
896 free(filename);
897 fallback:
898 /*
899 * If we don't have build-ids or the build-id file isn't in the
900 * cache, or is just a kallsyms file, well, lets hope that this
901 * DSO is the same as when 'perf record' ran.
902 */
903 filename = dso->long_name;
904 snprintf(symfs_filename, sizeof(symfs_filename), "%s%s",
905 symbol_conf.symfs, filename);
906 free_filename = false;
907 }
908
909 if (dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS &&
910 !dso__is_kcore(dso)) {
911 char bf[BUILD_ID_SIZE * 2 + 16] = " with build id ";
912 char *build_id_msg = NULL;
913
914 if (dso->annotate_warned)
915 goto out_free_filename;
916
917 if (dso->has_build_id) {
918 build_id__sprintf(dso->build_id,
919 sizeof(dso->build_id), bf + 15);
920 build_id_msg = bf;
921 }
922 err = -ENOENT;
923 dso->annotate_warned = 1;
924 pr_err("Can't annotate %s:\n\n"
925 "No vmlinux file%s\nwas found in the path.\n\n"
926 "Please use:\n\n"
927 " perf buildid-cache -vu vmlinux\n\n"
928 "or:\n\n"
929 " --vmlinux vmlinux\n",
930 sym->name, build_id_msg ?: "");
931 goto out_free_filename;
932 }
933
934 pr_debug("%s: filename=%s, sym=%s, start=%#" PRIx64 ", end=%#" PRIx64 "\n", __func__,
935 filename, sym->name, map->unmap_ip(map, sym->start),
936 map->unmap_ip(map, sym->end));
937
938 pr_debug("annotating [%p] %30s : [%p] %30s\n",
939 dso, dso->long_name, sym, sym->name);
940
941 if (dso__is_kcore(dso)) {
942 kce.kcore_filename = symfs_filename;
943 kce.addr = map__rip_2objdump(map, sym->start);
944 kce.offs = sym->start;
945 kce.len = sym->end + 1 - sym->start;
946 if (!kcore_extract__create(&kce)) {
947 delete_extract = true;
948 strlcpy(symfs_filename, kce.extract_filename,
949 sizeof(symfs_filename));
950 if (free_filename) {
951 free(filename);
952 free_filename = false;
953 }
954 filename = symfs_filename;
955 }
956 }
957
958 snprintf(command, sizeof(command),
959 "%s %s%s --start-address=0x%016" PRIx64
960 " --stop-address=0x%016" PRIx64
961 " -d %s %s -C %s 2>/dev/null|grep -v %s|expand",
962 objdump_path ? objdump_path : "objdump",
963 disassembler_style ? "-M " : "",
964 disassembler_style ? disassembler_style : "",
965 map__rip_2objdump(map, sym->start),
966 map__rip_2objdump(map, sym->end+1),
967 symbol_conf.annotate_asm_raw ? "" : "--no-show-raw",
968 symbol_conf.annotate_src ? "-S" : "",
969 symfs_filename, filename);
970
971 pr_debug("Executing: %s\n", command);
972
973 file = popen(command, "r");
974 if (!file)
975 goto out_free_filename;
976
977 while (!feof(file))
978 if (symbol__parse_objdump_line(sym, map, file, privsize) < 0)
979 break;
980
981 /*
982 * kallsyms does not have symbol sizes so there may a nop at the end.
983 * Remove it.
984 */
985 if (dso__is_kcore(dso))
986 delete_last_nop(sym);
987
988 pclose(file);
989 out_free_filename:
990 if (delete_extract)
991 kcore_extract__delete(&kce);
992 if (free_filename)
993 free(filename);
994 return err;
995 }
996
997 static void insert_source_line(struct rb_root *root, struct source_line *src_line)
998 {
999 struct source_line *iter;
1000 struct rb_node **p = &root->rb_node;
1001 struct rb_node *parent = NULL;
1002 int i, ret;
1003
1004 while (*p != NULL) {
1005 parent = *p;
1006 iter = rb_entry(parent, struct source_line, node);
1007
1008 ret = strcmp(iter->path, src_line->path);
1009 if (ret == 0) {
1010 for (i = 0; i < src_line->nr_pcnt; i++)
1011 iter->p[i].percent_sum += src_line->p[i].percent;
1012 return;
1013 }
1014
1015 if (ret < 0)
1016 p = &(*p)->rb_left;
1017 else
1018 p = &(*p)->rb_right;
1019 }
1020
1021 for (i = 0; i < src_line->nr_pcnt; i++)
1022 src_line->p[i].percent_sum = src_line->p[i].percent;
1023
1024 rb_link_node(&src_line->node, parent, p);
1025 rb_insert_color(&src_line->node, root);
1026 }
1027
1028 static int cmp_source_line(struct source_line *a, struct source_line *b)
1029 {
1030 int i;
1031
1032 for (i = 0; i < a->nr_pcnt; i++) {
1033 if (a->p[i].percent_sum == b->p[i].percent_sum)
1034 continue;
1035 return a->p[i].percent_sum > b->p[i].percent_sum;
1036 }
1037
1038 return 0;
1039 }
1040
1041 static void __resort_source_line(struct rb_root *root, struct source_line *src_line)
1042 {
1043 struct source_line *iter;
1044 struct rb_node **p = &root->rb_node;
1045 struct rb_node *parent = NULL;
1046
1047 while (*p != NULL) {
1048 parent = *p;
1049 iter = rb_entry(parent, struct source_line, node);
1050
1051 if (cmp_source_line(src_line, iter))
1052 p = &(*p)->rb_left;
1053 else
1054 p = &(*p)->rb_right;
1055 }
1056
1057 rb_link_node(&src_line->node, parent, p);
1058 rb_insert_color(&src_line->node, root);
1059 }
1060
1061 static void resort_source_line(struct rb_root *dest_root, struct rb_root *src_root)
1062 {
1063 struct source_line *src_line;
1064 struct rb_node *node;
1065
1066 node = rb_first(src_root);
1067 while (node) {
1068 struct rb_node *next;
1069
1070 src_line = rb_entry(node, struct source_line, node);
1071 next = rb_next(node);
1072 rb_erase(node, src_root);
1073
1074 __resort_source_line(dest_root, src_line);
1075 node = next;
1076 }
1077 }
1078
1079 static void symbol__free_source_line(struct symbol *sym, int len)
1080 {
1081 struct annotation *notes = symbol__annotation(sym);
1082 struct source_line *src_line = notes->src->lines;
1083 size_t sizeof_src_line;
1084 int i;
1085
1086 sizeof_src_line = sizeof(*src_line) +
1087 (sizeof(src_line->p) * (src_line->nr_pcnt - 1));
1088
1089 for (i = 0; i < len; i++) {
1090 free_srcline(src_line->path);
1091 src_line = (void *)src_line + sizeof_src_line;
1092 }
1093
1094 free(notes->src->lines);
1095 notes->src->lines = NULL;
1096 }
1097
1098 /* Get the filename:line for the colored entries */
1099 static int symbol__get_source_line(struct symbol *sym, struct map *map,
1100 struct perf_evsel *evsel,
1101 struct rb_root *root, int len)
1102 {
1103 u64 start;
1104 int i, k;
1105 int evidx = evsel->idx;
1106 struct source_line *src_line;
1107 struct annotation *notes = symbol__annotation(sym);
1108 struct sym_hist *h = annotation__histogram(notes, evidx);
1109 struct rb_root tmp_root = RB_ROOT;
1110 int nr_pcnt = 1;
1111 u64 h_sum = h->sum;
1112 size_t sizeof_src_line = sizeof(struct source_line);
1113
1114 if (perf_evsel__is_group_event(evsel)) {
1115 for (i = 1; i < evsel->nr_members; i++) {
1116 h = annotation__histogram(notes, evidx + i);
1117 h_sum += h->sum;
1118 }
1119 nr_pcnt = evsel->nr_members;
1120 sizeof_src_line += (nr_pcnt - 1) * sizeof(src_line->p);
1121 }
1122
1123 if (!h_sum)
1124 return 0;
1125
1126 src_line = notes->src->lines = calloc(len, sizeof_src_line);
1127 if (!notes->src->lines)
1128 return -1;
1129
1130 start = map__rip_2objdump(map, sym->start);
1131
1132 for (i = 0; i < len; i++) {
1133 u64 offset;
1134 double percent_max = 0.0;
1135
1136 src_line->nr_pcnt = nr_pcnt;
1137
1138 for (k = 0; k < nr_pcnt; k++) {
1139 h = annotation__histogram(notes, evidx + k);
1140 src_line->p[k].percent = 100.0 * h->addr[i] / h->sum;
1141
1142 if (src_line->p[k].percent > percent_max)
1143 percent_max = src_line->p[k].percent;
1144 }
1145
1146 if (percent_max <= 0.5)
1147 goto next;
1148
1149 offset = start + i;
1150 src_line->path = get_srcline(map->dso, offset);
1151 insert_source_line(&tmp_root, src_line);
1152
1153 next:
1154 src_line = (void *)src_line + sizeof_src_line;
1155 }
1156
1157 resort_source_line(root, &tmp_root);
1158 return 0;
1159 }
1160
1161 static void print_summary(struct rb_root *root, const char *filename)
1162 {
1163 struct source_line *src_line;
1164 struct rb_node *node;
1165
1166 printf("\nSorted summary for file %s\n", filename);
1167 printf("----------------------------------------------\n\n");
1168
1169 if (RB_EMPTY_ROOT(root)) {
1170 printf(" Nothing higher than %1.1f%%\n", MIN_GREEN);
1171 return;
1172 }
1173
1174 node = rb_first(root);
1175 while (node) {
1176 double percent, percent_max = 0.0;
1177 const char *color;
1178 char *path;
1179 int i;
1180
1181 src_line = rb_entry(node, struct source_line, node);
1182 for (i = 0; i < src_line->nr_pcnt; i++) {
1183 percent = src_line->p[i].percent_sum;
1184 color = get_percent_color(percent);
1185 color_fprintf(stdout, color, " %7.2f", percent);
1186
1187 if (percent > percent_max)
1188 percent_max = percent;
1189 }
1190
1191 path = src_line->path;
1192 color = get_percent_color(percent_max);
1193 color_fprintf(stdout, color, " %s\n", path);
1194
1195 node = rb_next(node);
1196 }
1197 }
1198
1199 static void symbol__annotate_hits(struct symbol *sym, struct perf_evsel *evsel)
1200 {
1201 struct annotation *notes = symbol__annotation(sym);
1202 struct sym_hist *h = annotation__histogram(notes, evsel->idx);
1203 u64 len = symbol__size(sym), offset;
1204
1205 for (offset = 0; offset < len; ++offset)
1206 if (h->addr[offset] != 0)
1207 printf("%*" PRIx64 ": %" PRIu64 "\n", BITS_PER_LONG / 2,
1208 sym->start + offset, h->addr[offset]);
1209 printf("%*s: %" PRIu64 "\n", BITS_PER_LONG / 2, "h->sum", h->sum);
1210 }
1211
1212 int symbol__annotate_printf(struct symbol *sym, struct map *map,
1213 struct perf_evsel *evsel, bool full_paths,
1214 int min_pcnt, int max_lines, int context)
1215 {
1216 struct dso *dso = map->dso;
1217 char *filename;
1218 const char *d_filename;
1219 struct annotation *notes = symbol__annotation(sym);
1220 struct disasm_line *pos, *queue = NULL;
1221 u64 start = map__rip_2objdump(map, sym->start);
1222 int printed = 2, queue_len = 0;
1223 int more = 0;
1224 u64 len;
1225 int width = 8;
1226 int namelen;
1227
1228 filename = strdup(dso->long_name);
1229 if (!filename)
1230 return -ENOMEM;
1231
1232 if (full_paths)
1233 d_filename = filename;
1234 else
1235 d_filename = basename(filename);
1236
1237 len = symbol__size(sym);
1238 namelen = strlen(d_filename);
1239
1240 if (perf_evsel__is_group_event(evsel))
1241 width *= evsel->nr_members;
1242
1243 printf(" %-*.*s| Source code & Disassembly of %s\n",
1244 width, width, "Percent", d_filename);
1245 printf("-%-*.*s-------------------------------------\n",
1246 width+namelen, width+namelen, graph_dotted_line);
1247
1248 if (verbose)
1249 symbol__annotate_hits(sym, evsel);
1250
1251 list_for_each_entry(pos, &notes->src->source, node) {
1252 if (context && queue == NULL) {
1253 queue = pos;
1254 queue_len = 0;
1255 }
1256
1257 switch (disasm_line__print(pos, sym, start, evsel, len,
1258 min_pcnt, printed, max_lines,
1259 queue)) {
1260 case 0:
1261 ++printed;
1262 if (context) {
1263 printed += queue_len;
1264 queue = NULL;
1265 queue_len = 0;
1266 }
1267 break;
1268 case 1:
1269 /* filtered by max_lines */
1270 ++more;
1271 break;
1272 case -1:
1273 default:
1274 /*
1275 * Filtered by min_pcnt or non IP lines when
1276 * context != 0
1277 */
1278 if (!context)
1279 break;
1280 if (queue_len == context)
1281 queue = list_entry(queue->node.next, typeof(*queue), node);
1282 else
1283 ++queue_len;
1284 break;
1285 }
1286 }
1287
1288 free(filename);
1289
1290 return more;
1291 }
1292
1293 void symbol__annotate_zero_histogram(struct symbol *sym, int evidx)
1294 {
1295 struct annotation *notes = symbol__annotation(sym);
1296 struct sym_hist *h = annotation__histogram(notes, evidx);
1297
1298 memset(h, 0, notes->src->sizeof_sym_hist);
1299 }
1300
1301 void symbol__annotate_decay_histogram(struct symbol *sym, int evidx)
1302 {
1303 struct annotation *notes = symbol__annotation(sym);
1304 struct sym_hist *h = annotation__histogram(notes, evidx);
1305 int len = symbol__size(sym), offset;
1306
1307 h->sum = 0;
1308 for (offset = 0; offset < len; ++offset) {
1309 h->addr[offset] = h->addr[offset] * 7 / 8;
1310 h->sum += h->addr[offset];
1311 }
1312 }
1313
1314 void disasm__purge(struct list_head *head)
1315 {
1316 struct disasm_line *pos, *n;
1317
1318 list_for_each_entry_safe(pos, n, head, node) {
1319 list_del(&pos->node);
1320 disasm_line__free(pos);
1321 }
1322 }
1323
1324 static size_t disasm_line__fprintf(struct disasm_line *dl, FILE *fp)
1325 {
1326 size_t printed;
1327
1328 if (dl->offset == -1)
1329 return fprintf(fp, "%s\n", dl->line);
1330
1331 printed = fprintf(fp, "%#" PRIx64 " %s", dl->offset, dl->name);
1332
1333 if (dl->ops.raw[0] != '\0') {
1334 printed += fprintf(fp, "%.*s %s\n", 6 - (int)printed, " ",
1335 dl->ops.raw);
1336 }
1337
1338 return printed + fprintf(fp, "\n");
1339 }
1340
1341 size_t disasm__fprintf(struct list_head *head, FILE *fp)
1342 {
1343 struct disasm_line *pos;
1344 size_t printed = 0;
1345
1346 list_for_each_entry(pos, head, node)
1347 printed += disasm_line__fprintf(pos, fp);
1348
1349 return printed;
1350 }
1351
1352 int symbol__tty_annotate(struct symbol *sym, struct map *map,
1353 struct perf_evsel *evsel, bool print_lines,
1354 bool full_paths, int min_pcnt, int max_lines)
1355 {
1356 struct dso *dso = map->dso;
1357 struct rb_root source_line = RB_ROOT;
1358 u64 len;
1359
1360 if (symbol__annotate(sym, map, 0) < 0)
1361 return -1;
1362
1363 len = symbol__size(sym);
1364
1365 if (print_lines) {
1366 symbol__get_source_line(sym, map, evsel, &source_line, len);
1367 print_summary(&source_line, dso->long_name);
1368 }
1369
1370 symbol__annotate_printf(sym, map, evsel, full_paths,
1371 min_pcnt, max_lines, 0);
1372 if (print_lines)
1373 symbol__free_source_line(sym, len);
1374
1375 disasm__purge(&symbol__annotation(sym)->src->source);
1376
1377 return 0;
1378 }
Linux kernel - Deliverables
This page took 0.108221 seconds and 6 git commands to generate.