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perf annotate: Auto allocate symbol per addr hist buckets
[mirror_ubuntu-artful-kernel.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 static int __symbol__inc_addr_samples(struct symbol *sym, struct map *map,
468 struct annotation *notes, int evidx, u64 addr)
469 {
470 unsigned offset;
471 struct sym_hist *h;
472
473 pr_debug3("%s: addr=%#" PRIx64 "\n", __func__, map->unmap_ip(map, addr));
474
475 if (addr < sym->start || addr > sym->end)
476 return -ERANGE;
477
478 offset = addr - sym->start;
479 h = annotation__histogram(notes, evidx);
480 h->sum++;
481 h->addr[offset]++;
482
483 pr_debug3("%#" PRIx64 " %s: period++ [addr: %#" PRIx64 ", %#" PRIx64
484 ", evidx=%d] => %" PRIu64 "\n", sym->start, sym->name,
485 addr, addr - sym->start, evidx, h->addr[offset]);
486 return 0;
487 }
488
489 int symbol__inc_addr_samples(struct symbol *sym, struct map *map,
490 int evidx, u64 addr)
491 {
492 struct annotation *notes;
493
494 if (sym == NULL || use_browser != 1 || !sort__has_sym)
495 return 0;
496
497 notes = symbol__annotation(sym);
498 if (notes->src == NULL) {
499 if (symbol__alloc_hist(sym) < 0)
500 return -ENOMEM;
501 }
502
503 return __symbol__inc_addr_samples(sym, map, notes, evidx, addr);
504 }
505
506 static void disasm_line__init_ins(struct disasm_line *dl)
507 {
508 dl->ins = ins__find(dl->name);
509
510 if (dl->ins == NULL)
511 return;
512
513 if (!dl->ins->ops)
514 return;
515
516 if (dl->ins->ops->parse)
517 dl->ins->ops->parse(&dl->ops);
518 }
519
520 static int disasm_line__parse(char *line, char **namep, char **rawp)
521 {
522 char *name = line, tmp;
523
524 while (isspace(name[0]))
525 ++name;
526
527 if (name[0] == '\0')
528 return -1;
529
530 *rawp = name + 1;
531
532 while ((*rawp)[0] != '\0' && !isspace((*rawp)[0]))
533 ++*rawp;
534
535 tmp = (*rawp)[0];
536 (*rawp)[0] = '\0';
537 *namep = strdup(name);
538
539 if (*namep == NULL)
540 goto out_free_name;
541
542 (*rawp)[0] = tmp;
543
544 if ((*rawp)[0] != '\0') {
545 (*rawp)++;
546 while (isspace((*rawp)[0]))
547 ++(*rawp);
548 }
549
550 return 0;
551
552 out_free_name:
553 free(*namep);
554 *namep = NULL;
555 return -1;
556 }
557
558 static struct disasm_line *disasm_line__new(s64 offset, char *line, size_t privsize)
559 {
560 struct disasm_line *dl = zalloc(sizeof(*dl) + privsize);
561
562 if (dl != NULL) {
563 dl->offset = offset;
564 dl->line = strdup(line);
565 if (dl->line == NULL)
566 goto out_delete;
567
568 if (offset != -1) {
569 if (disasm_line__parse(dl->line, &dl->name, &dl->ops.raw) < 0)
570 goto out_free_line;
571
572 disasm_line__init_ins(dl);
573 }
574 }
575
576 return dl;
577
578 out_free_line:
579 free(dl->line);
580 out_delete:
581 free(dl);
582 return NULL;
583 }
584
585 void disasm_line__free(struct disasm_line *dl)
586 {
587 free(dl->line);
588 free(dl->name);
589 if (dl->ins && dl->ins->ops->free)
590 dl->ins->ops->free(&dl->ops);
591 else
592 ins__delete(&dl->ops);
593 free(dl);
594 }
595
596 int disasm_line__scnprintf(struct disasm_line *dl, char *bf, size_t size, bool raw)
597 {
598 if (raw || !dl->ins)
599 return scnprintf(bf, size, "%-6.6s %s", dl->name, dl->ops.raw);
600
601 return ins__scnprintf(dl->ins, bf, size, &dl->ops);
602 }
603
604 static void disasm__add(struct list_head *head, struct disasm_line *line)
605 {
606 list_add_tail(&line->node, head);
607 }
608
609 struct disasm_line *disasm__get_next_ip_line(struct list_head *head, struct disasm_line *pos)
610 {
611 list_for_each_entry_continue(pos, head, node)
612 if (pos->offset >= 0)
613 return pos;
614
615 return NULL;
616 }
617
618 double disasm__calc_percent(struct annotation *notes, int evidx, s64 offset,
619 s64 end, const char **path)
620 {
621 struct source_line *src_line = notes->src->lines;
622 double percent = 0.0;
623
624 if (src_line) {
625 size_t sizeof_src_line = sizeof(*src_line) +
626 sizeof(src_line->p) * (src_line->nr_pcnt - 1);
627
628 while (offset < end) {
629 src_line = (void *)notes->src->lines +
630 (sizeof_src_line * offset);
631
632 if (*path == NULL)
633 *path = src_line->path;
634
635 percent += src_line->p[evidx].percent;
636 offset++;
637 }
638 } else {
639 struct sym_hist *h = annotation__histogram(notes, evidx);
640 unsigned int hits = 0;
641
642 while (offset < end)
643 hits += h->addr[offset++];
644
645 if (h->sum)
646 percent = 100.0 * hits / h->sum;
647 }
648
649 return percent;
650 }
651
652 static int disasm_line__print(struct disasm_line *dl, struct symbol *sym, u64 start,
653 struct perf_evsel *evsel, u64 len, int min_pcnt, int printed,
654 int max_lines, struct disasm_line *queue)
655 {
656 static const char *prev_line;
657 static const char *prev_color;
658
659 if (dl->offset != -1) {
660 const char *path = NULL;
661 double percent, max_percent = 0.0;
662 double *ppercents = &percent;
663 int i, nr_percent = 1;
664 const char *color;
665 struct annotation *notes = symbol__annotation(sym);
666 s64 offset = dl->offset;
667 const u64 addr = start + offset;
668 struct disasm_line *next;
669
670 next = disasm__get_next_ip_line(&notes->src->source, dl);
671
672 if (perf_evsel__is_group_event(evsel)) {
673 nr_percent = evsel->nr_members;
674 ppercents = calloc(nr_percent, sizeof(double));
675 if (ppercents == NULL)
676 return -1;
677 }
678
679 for (i = 0; i < nr_percent; i++) {
680 percent = disasm__calc_percent(notes,
681 notes->src->lines ? i : evsel->idx + i,
682 offset,
683 next ? next->offset : (s64) len,
684 &path);
685
686 ppercents[i] = percent;
687 if (percent > max_percent)
688 max_percent = percent;
689 }
690
691 if (max_percent < min_pcnt)
692 return -1;
693
694 if (max_lines && printed >= max_lines)
695 return 1;
696
697 if (queue != NULL) {
698 list_for_each_entry_from(queue, &notes->src->source, node) {
699 if (queue == dl)
700 break;
701 disasm_line__print(queue, sym, start, evsel, len,
702 0, 0, 1, NULL);
703 }
704 }
705
706 color = get_percent_color(max_percent);
707
708 /*
709 * Also color the filename and line if needed, with
710 * the same color than the percentage. Don't print it
711 * twice for close colored addr with the same filename:line
712 */
713 if (path) {
714 if (!prev_line || strcmp(prev_line, path)
715 || color != prev_color) {
716 color_fprintf(stdout, color, " %s", path);
717 prev_line = path;
718 prev_color = color;
719 }
720 }
721
722 for (i = 0; i < nr_percent; i++) {
723 percent = ppercents[i];
724 color = get_percent_color(percent);
725 color_fprintf(stdout, color, " %7.2f", percent);
726 }
727
728 printf(" : ");
729 color_fprintf(stdout, PERF_COLOR_MAGENTA, " %" PRIx64 ":", addr);
730 color_fprintf(stdout, PERF_COLOR_BLUE, "%s\n", dl->line);
731
732 if (ppercents != &percent)
733 free(ppercents);
734
735 } else if (max_lines && printed >= max_lines)
736 return 1;
737 else {
738 int width = 8;
739
740 if (queue)
741 return -1;
742
743 if (perf_evsel__is_group_event(evsel))
744 width *= evsel->nr_members;
745
746 if (!*dl->line)
747 printf(" %*s:\n", width, " ");
748 else
749 printf(" %*s: %s\n", width, " ", dl->line);
750 }
751
752 return 0;
753 }
754
755 /*
756 * symbol__parse_objdump_line() parses objdump output (with -d --no-show-raw)
757 * which looks like following
758 *
759 * 0000000000415500 <_init>:
760 * 415500: sub $0x8,%rsp
761 * 415504: mov 0x2f5ad5(%rip),%rax # 70afe0 <_DYNAMIC+0x2f8>
762 * 41550b: test %rax,%rax
763 * 41550e: je 415515 <_init+0x15>
764 * 415510: callq 416e70 <__gmon_start__@plt>
765 * 415515: add $0x8,%rsp
766 * 415519: retq
767 *
768 * it will be parsed and saved into struct disasm_line as
769 * <offset> <name> <ops.raw>
770 *
771 * The offset will be a relative offset from the start of the symbol and -1
772 * means that it's not a disassembly line so should be treated differently.
773 * The ops.raw part will be parsed further according to type of the instruction.
774 */
775 static int symbol__parse_objdump_line(struct symbol *sym, struct map *map,
776 FILE *file, size_t privsize)
777 {
778 struct annotation *notes = symbol__annotation(sym);
779 struct disasm_line *dl;
780 char *line = NULL, *parsed_line, *tmp, *tmp2, *c;
781 size_t line_len;
782 s64 line_ip, offset = -1;
783
784 if (getline(&line, &line_len, file) < 0)
785 return -1;
786
787 if (!line)
788 return -1;
789
790 while (line_len != 0 && isspace(line[line_len - 1]))
791 line[--line_len] = '\0';
792
793 c = strchr(line, '\n');
794 if (c)
795 *c = 0;
796
797 line_ip = -1;
798 parsed_line = line;
799
800 /*
801 * Strip leading spaces:
802 */
803 tmp = line;
804 while (*tmp) {
805 if (*tmp != ' ')
806 break;
807 tmp++;
808 }
809
810 if (*tmp) {
811 /*
812 * Parse hexa addresses followed by ':'
813 */
814 line_ip = strtoull(tmp, &tmp2, 16);
815 if (*tmp2 != ':' || tmp == tmp2 || tmp2[1] == '\0')
816 line_ip = -1;
817 }
818
819 if (line_ip != -1) {
820 u64 start = map__rip_2objdump(map, sym->start),
821 end = map__rip_2objdump(map, sym->end);
822
823 offset = line_ip - start;
824 if ((u64)line_ip < start || (u64)line_ip > end)
825 offset = -1;
826 else
827 parsed_line = tmp2 + 1;
828 }
829
830 dl = disasm_line__new(offset, parsed_line, privsize);
831 free(line);
832
833 if (dl == NULL)
834 return -1;
835
836 if (dl->ops.target.offset == UINT64_MAX)
837 dl->ops.target.offset = dl->ops.target.addr -
838 map__rip_2objdump(map, sym->start);
839
840 /* kcore has no symbols, so add the call target name */
841 if (dl->ins && ins__is_call(dl->ins) && !dl->ops.target.name) {
842 struct addr_map_symbol target = {
843 .map = map,
844 .addr = dl->ops.target.addr,
845 };
846
847 if (!map_groups__find_ams(&target, NULL) &&
848 target.sym->start == target.al_addr)
849 dl->ops.target.name = strdup(target.sym->name);
850 }
851
852 disasm__add(&notes->src->source, dl);
853
854 return 0;
855 }
856
857 static void delete_last_nop(struct symbol *sym)
858 {
859 struct annotation *notes = symbol__annotation(sym);
860 struct list_head *list = &notes->src->source;
861 struct disasm_line *dl;
862
863 while (!list_empty(list)) {
864 dl = list_entry(list->prev, struct disasm_line, node);
865
866 if (dl->ins && dl->ins->ops) {
867 if (dl->ins->ops != &nop_ops)
868 return;
869 } else {
870 if (!strstr(dl->line, " nop ") &&
871 !strstr(dl->line, " nopl ") &&
872 !strstr(dl->line, " nopw "))
873 return;
874 }
875
876 list_del(&dl->node);
877 disasm_line__free(dl);
878 }
879 }
880
881 int symbol__annotate(struct symbol *sym, struct map *map, size_t privsize)
882 {
883 struct dso *dso = map->dso;
884 char *filename = dso__build_id_filename(dso, NULL, 0);
885 bool free_filename = true;
886 char command[PATH_MAX * 2];
887 FILE *file;
888 int err = 0;
889 char symfs_filename[PATH_MAX];
890 struct kcore_extract kce;
891 bool delete_extract = false;
892
893 if (filename) {
894 snprintf(symfs_filename, sizeof(symfs_filename), "%s%s",
895 symbol_conf.symfs, filename);
896 }
897
898 if (filename == NULL) {
899 if (dso->has_build_id) {
900 pr_err("Can't annotate %s: not enough memory\n",
901 sym->name);
902 return -ENOMEM;
903 }
904 goto fallback;
905 } else if (readlink(symfs_filename, command, sizeof(command)) < 0 ||
906 strstr(command, "[kernel.kallsyms]") ||
907 access(symfs_filename, R_OK)) {
908 free(filename);
909 fallback:
910 /*
911 * If we don't have build-ids or the build-id file isn't in the
912 * cache, or is just a kallsyms file, well, lets hope that this
913 * DSO is the same as when 'perf record' ran.
914 */
915 filename = (char *)dso->long_name;
916 snprintf(symfs_filename, sizeof(symfs_filename), "%s%s",
917 symbol_conf.symfs, filename);
918 free_filename = false;
919 }
920
921 if (dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS &&
922 !dso__is_kcore(dso)) {
923 char bf[BUILD_ID_SIZE * 2 + 16] = " with build id ";
924 char *build_id_msg = NULL;
925
926 if (dso->annotate_warned)
927 goto out_free_filename;
928
929 if (dso->has_build_id) {
930 build_id__sprintf(dso->build_id,
931 sizeof(dso->build_id), bf + 15);
932 build_id_msg = bf;
933 }
934 err = -ENOENT;
935 dso->annotate_warned = 1;
936 pr_err("Can't annotate %s:\n\n"
937 "No vmlinux file%s\nwas found in the path.\n\n"
938 "Please use:\n\n"
939 " perf buildid-cache -vu vmlinux\n\n"
940 "or:\n\n"
941 " --vmlinux vmlinux\n",
942 sym->name, build_id_msg ?: "");
943 goto out_free_filename;
944 }
945
946 pr_debug("%s: filename=%s, sym=%s, start=%#" PRIx64 ", end=%#" PRIx64 "\n", __func__,
947 filename, sym->name, map->unmap_ip(map, sym->start),
948 map->unmap_ip(map, sym->end));
949
950 pr_debug("annotating [%p] %30s : [%p] %30s\n",
951 dso, dso->long_name, sym, sym->name);
952
953 if (dso__is_kcore(dso)) {
954 kce.kcore_filename = symfs_filename;
955 kce.addr = map__rip_2objdump(map, sym->start);
956 kce.offs = sym->start;
957 kce.len = sym->end + 1 - sym->start;
958 if (!kcore_extract__create(&kce)) {
959 delete_extract = true;
960 strlcpy(symfs_filename, kce.extract_filename,
961 sizeof(symfs_filename));
962 if (free_filename) {
963 free(filename);
964 free_filename = false;
965 }
966 filename = symfs_filename;
967 }
968 }
969
970 snprintf(command, sizeof(command),
971 "%s %s%s --start-address=0x%016" PRIx64
972 " --stop-address=0x%016" PRIx64
973 " -d %s %s -C %s 2>/dev/null|grep -v %s|expand",
974 objdump_path ? objdump_path : "objdump",
975 disassembler_style ? "-M " : "",
976 disassembler_style ? disassembler_style : "",
977 map__rip_2objdump(map, sym->start),
978 map__rip_2objdump(map, sym->end+1),
979 symbol_conf.annotate_asm_raw ? "" : "--no-show-raw",
980 symbol_conf.annotate_src ? "-S" : "",
981 symfs_filename, filename);
982
983 pr_debug("Executing: %s\n", command);
984
985 file = popen(command, "r");
986 if (!file)
987 goto out_free_filename;
988
989 while (!feof(file))
990 if (symbol__parse_objdump_line(sym, map, file, privsize) < 0)
991 break;
992
993 /*
994 * kallsyms does not have symbol sizes so there may a nop at the end.
995 * Remove it.
996 */
997 if (dso__is_kcore(dso))
998 delete_last_nop(sym);
999
1000 pclose(file);
1001 out_free_filename:
1002 if (delete_extract)
1003 kcore_extract__delete(&kce);
1004 if (free_filename)
1005 free(filename);
1006 return err;
1007 }
1008
1009 static void insert_source_line(struct rb_root *root, struct source_line *src_line)
1010 {
1011 struct source_line *iter;
1012 struct rb_node **p = &root->rb_node;
1013 struct rb_node *parent = NULL;
1014 int i, ret;
1015
1016 while (*p != NULL) {
1017 parent = *p;
1018 iter = rb_entry(parent, struct source_line, node);
1019
1020 ret = strcmp(iter->path, src_line->path);
1021 if (ret == 0) {
1022 for (i = 0; i < src_line->nr_pcnt; i++)
1023 iter->p[i].percent_sum += src_line->p[i].percent;
1024 return;
1025 }
1026
1027 if (ret < 0)
1028 p = &(*p)->rb_left;
1029 else
1030 p = &(*p)->rb_right;
1031 }
1032
1033 for (i = 0; i < src_line->nr_pcnt; i++)
1034 src_line->p[i].percent_sum = src_line->p[i].percent;
1035
1036 rb_link_node(&src_line->node, parent, p);
1037 rb_insert_color(&src_line->node, root);
1038 }
1039
1040 static int cmp_source_line(struct source_line *a, struct source_line *b)
1041 {
1042 int i;
1043
1044 for (i = 0; i < a->nr_pcnt; i++) {
1045 if (a->p[i].percent_sum == b->p[i].percent_sum)
1046 continue;
1047 return a->p[i].percent_sum > b->p[i].percent_sum;
1048 }
1049
1050 return 0;
1051 }
1052
1053 static void __resort_source_line(struct rb_root *root, struct source_line *src_line)
1054 {
1055 struct source_line *iter;
1056 struct rb_node **p = &root->rb_node;
1057 struct rb_node *parent = NULL;
1058
1059 while (*p != NULL) {
1060 parent = *p;
1061 iter = rb_entry(parent, struct source_line, node);
1062
1063 if (cmp_source_line(src_line, iter))
1064 p = &(*p)->rb_left;
1065 else
1066 p = &(*p)->rb_right;
1067 }
1068
1069 rb_link_node(&src_line->node, parent, p);
1070 rb_insert_color(&src_line->node, root);
1071 }
1072
1073 static void resort_source_line(struct rb_root *dest_root, struct rb_root *src_root)
1074 {
1075 struct source_line *src_line;
1076 struct rb_node *node;
1077
1078 node = rb_first(src_root);
1079 while (node) {
1080 struct rb_node *next;
1081
1082 src_line = rb_entry(node, struct source_line, node);
1083 next = rb_next(node);
1084 rb_erase(node, src_root);
1085
1086 __resort_source_line(dest_root, src_line);
1087 node = next;
1088 }
1089 }
1090
1091 static void symbol__free_source_line(struct symbol *sym, int len)
1092 {
1093 struct annotation *notes = symbol__annotation(sym);
1094 struct source_line *src_line = notes->src->lines;
1095 size_t sizeof_src_line;
1096 int i;
1097
1098 sizeof_src_line = sizeof(*src_line) +
1099 (sizeof(src_line->p) * (src_line->nr_pcnt - 1));
1100
1101 for (i = 0; i < len; i++) {
1102 free_srcline(src_line->path);
1103 src_line = (void *)src_line + sizeof_src_line;
1104 }
1105
1106 free(notes->src->lines);
1107 notes->src->lines = NULL;
1108 }
1109
1110 /* Get the filename:line for the colored entries */
1111 static int symbol__get_source_line(struct symbol *sym, struct map *map,
1112 struct perf_evsel *evsel,
1113 struct rb_root *root, int len)
1114 {
1115 u64 start;
1116 int i, k;
1117 int evidx = evsel->idx;
1118 struct source_line *src_line;
1119 struct annotation *notes = symbol__annotation(sym);
1120 struct sym_hist *h = annotation__histogram(notes, evidx);
1121 struct rb_root tmp_root = RB_ROOT;
1122 int nr_pcnt = 1;
1123 u64 h_sum = h->sum;
1124 size_t sizeof_src_line = sizeof(struct source_line);
1125
1126 if (perf_evsel__is_group_event(evsel)) {
1127 for (i = 1; i < evsel->nr_members; i++) {
1128 h = annotation__histogram(notes, evidx + i);
1129 h_sum += h->sum;
1130 }
1131 nr_pcnt = evsel->nr_members;
1132 sizeof_src_line += (nr_pcnt - 1) * sizeof(src_line->p);
1133 }
1134
1135 if (!h_sum)
1136 return 0;
1137
1138 src_line = notes->src->lines = calloc(len, sizeof_src_line);
1139 if (!notes->src->lines)
1140 return -1;
1141
1142 start = map__rip_2objdump(map, sym->start);
1143
1144 for (i = 0; i < len; i++) {
1145 u64 offset;
1146 double percent_max = 0.0;
1147
1148 src_line->nr_pcnt = nr_pcnt;
1149
1150 for (k = 0; k < nr_pcnt; k++) {
1151 h = annotation__histogram(notes, evidx + k);
1152 src_line->p[k].percent = 100.0 * h->addr[i] / h->sum;
1153
1154 if (src_line->p[k].percent > percent_max)
1155 percent_max = src_line->p[k].percent;
1156 }
1157
1158 if (percent_max <= 0.5)
1159 goto next;
1160
1161 offset = start + i;
1162 src_line->path = get_srcline(map->dso, offset);
1163 insert_source_line(&tmp_root, src_line);
1164
1165 next:
1166 src_line = (void *)src_line + sizeof_src_line;
1167 }
1168
1169 resort_source_line(root, &tmp_root);
1170 return 0;
1171 }
1172
1173 static void print_summary(struct rb_root *root, const char *filename)
1174 {
1175 struct source_line *src_line;
1176 struct rb_node *node;
1177
1178 printf("\nSorted summary for file %s\n", filename);
1179 printf("----------------------------------------------\n\n");
1180
1181 if (RB_EMPTY_ROOT(root)) {
1182 printf(" Nothing higher than %1.1f%%\n", MIN_GREEN);
1183 return;
1184 }
1185
1186 node = rb_first(root);
1187 while (node) {
1188 double percent, percent_max = 0.0;
1189 const char *color;
1190 char *path;
1191 int i;
1192
1193 src_line = rb_entry(node, struct source_line, node);
1194 for (i = 0; i < src_line->nr_pcnt; i++) {
1195 percent = src_line->p[i].percent_sum;
1196 color = get_percent_color(percent);
1197 color_fprintf(stdout, color, " %7.2f", percent);
1198
1199 if (percent > percent_max)
1200 percent_max = percent;
1201 }
1202
1203 path = src_line->path;
1204 color = get_percent_color(percent_max);
1205 color_fprintf(stdout, color, " %s\n", path);
1206
1207 node = rb_next(node);
1208 }
1209 }
1210
1211 static void symbol__annotate_hits(struct symbol *sym, struct perf_evsel *evsel)
1212 {
1213 struct annotation *notes = symbol__annotation(sym);
1214 struct sym_hist *h = annotation__histogram(notes, evsel->idx);
1215 u64 len = symbol__size(sym), offset;
1216
1217 for (offset = 0; offset < len; ++offset)
1218 if (h->addr[offset] != 0)
1219 printf("%*" PRIx64 ": %" PRIu64 "\n", BITS_PER_LONG / 2,
1220 sym->start + offset, h->addr[offset]);
1221 printf("%*s: %" PRIu64 "\n", BITS_PER_LONG / 2, "h->sum", h->sum);
1222 }
1223
1224 int symbol__annotate_printf(struct symbol *sym, struct map *map,
1225 struct perf_evsel *evsel, bool full_paths,
1226 int min_pcnt, int max_lines, int context)
1227 {
1228 struct dso *dso = map->dso;
1229 char *filename;
1230 const char *d_filename;
1231 struct annotation *notes = symbol__annotation(sym);
1232 struct disasm_line *pos, *queue = NULL;
1233 u64 start = map__rip_2objdump(map, sym->start);
1234 int printed = 2, queue_len = 0;
1235 int more = 0;
1236 u64 len;
1237 int width = 8;
1238 int namelen;
1239
1240 filename = strdup(dso->long_name);
1241 if (!filename)
1242 return -ENOMEM;
1243
1244 if (full_paths)
1245 d_filename = filename;
1246 else
1247 d_filename = basename(filename);
1248
1249 len = symbol__size(sym);
1250 namelen = strlen(d_filename);
1251
1252 if (perf_evsel__is_group_event(evsel))
1253 width *= evsel->nr_members;
1254
1255 printf(" %-*.*s| Source code & Disassembly of %s\n",
1256 width, width, "Percent", d_filename);
1257 printf("-%-*.*s-------------------------------------\n",
1258 width+namelen, width+namelen, graph_dotted_line);
1259
1260 if (verbose)
1261 symbol__annotate_hits(sym, evsel);
1262
1263 list_for_each_entry(pos, &notes->src->source, node) {
1264 if (context && queue == NULL) {
1265 queue = pos;
1266 queue_len = 0;
1267 }
1268
1269 switch (disasm_line__print(pos, sym, start, evsel, len,
1270 min_pcnt, printed, max_lines,
1271 queue)) {
1272 case 0:
1273 ++printed;
1274 if (context) {
1275 printed += queue_len;
1276 queue = NULL;
1277 queue_len = 0;
1278 }
1279 break;
1280 case 1:
1281 /* filtered by max_lines */
1282 ++more;
1283 break;
1284 case -1:
1285 default:
1286 /*
1287 * Filtered by min_pcnt or non IP lines when
1288 * context != 0
1289 */
1290 if (!context)
1291 break;
1292 if (queue_len == context)
1293 queue = list_entry(queue->node.next, typeof(*queue), node);
1294 else
1295 ++queue_len;
1296 break;
1297 }
1298 }
1299
1300 free(filename);
1301
1302 return more;
1303 }
1304
1305 void symbol__annotate_zero_histogram(struct symbol *sym, int evidx)
1306 {
1307 struct annotation *notes = symbol__annotation(sym);
1308 struct sym_hist *h = annotation__histogram(notes, evidx);
1309
1310 memset(h, 0, notes->src->sizeof_sym_hist);
1311 }
1312
1313 void symbol__annotate_decay_histogram(struct symbol *sym, int evidx)
1314 {
1315 struct annotation *notes = symbol__annotation(sym);
1316 struct sym_hist *h = annotation__histogram(notes, evidx);
1317 int len = symbol__size(sym), offset;
1318
1319 h->sum = 0;
1320 for (offset = 0; offset < len; ++offset) {
1321 h->addr[offset] = h->addr[offset] * 7 / 8;
1322 h->sum += h->addr[offset];
1323 }
1324 }
1325
1326 void disasm__purge(struct list_head *head)
1327 {
1328 struct disasm_line *pos, *n;
1329
1330 list_for_each_entry_safe(pos, n, head, node) {
1331 list_del(&pos->node);
1332 disasm_line__free(pos);
1333 }
1334 }
1335
1336 static size_t disasm_line__fprintf(struct disasm_line *dl, FILE *fp)
1337 {
1338 size_t printed;
1339
1340 if (dl->offset == -1)
1341 return fprintf(fp, "%s\n", dl->line);
1342
1343 printed = fprintf(fp, "%#" PRIx64 " %s", dl->offset, dl->name);
1344
1345 if (dl->ops.raw[0] != '\0') {
1346 printed += fprintf(fp, "%.*s %s\n", 6 - (int)printed, " ",
1347 dl->ops.raw);
1348 }
1349
1350 return printed + fprintf(fp, "\n");
1351 }
1352
1353 size_t disasm__fprintf(struct list_head *head, FILE *fp)
1354 {
1355 struct disasm_line *pos;
1356 size_t printed = 0;
1357
1358 list_for_each_entry(pos, head, node)
1359 printed += disasm_line__fprintf(pos, fp);
1360
1361 return printed;
1362 }
1363
1364 int symbol__tty_annotate(struct symbol *sym, struct map *map,
1365 struct perf_evsel *evsel, bool print_lines,
1366 bool full_paths, int min_pcnt, int max_lines)
1367 {
1368 struct dso *dso = map->dso;
1369 struct rb_root source_line = RB_ROOT;
1370 u64 len;
1371
1372 if (symbol__annotate(sym, map, 0) < 0)
1373 return -1;
1374
1375 len = symbol__size(sym);
1376
1377 if (print_lines) {
1378 symbol__get_source_line(sym, map, evsel, &source_line, len);
1379 print_summary(&source_line, dso->long_name);
1380 }
1381
1382 symbol__annotate_printf(sym, map, evsel, full_paths,
1383 min_pcnt, max_lines, 0);
1384 if (print_lines)
1385 symbol__free_source_line(sym, len);
1386
1387 disasm__purge(&symbol__annotation(sym)->src->source);
1388
1389 return 0;
1390 }
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