]> git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - tools/perf/util/annotate.c
projects / mirror_ubuntu-jammy-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'perf/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/acme...
[mirror_ubuntu-jammy-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 <errno.h>
11 #include <inttypes.h>
12 #include "util.h"
13 #include "ui/ui.h"
14 #include "sort.h"
15 #include "build-id.h"
16 #include "color.h"
17 #include "cache.h"
18 #include "symbol.h"
19 #include "debug.h"
20 #include "annotate.h"
21 #include "evsel.h"
22 #include "block-range.h"
23 #include "string2.h"
24 #include "arch/common.h"
25 #include <regex.h>
26 #include <pthread.h>
27 #include <linux/bitops.h>
28 #include <linux/kernel.h>
29 #include <sys/utsname.h>
30
31 #include "sane_ctype.h"
32
33 const char *disassembler_style;
34 const char *objdump_path;
35 static regex_t file_lineno;
36
37 static struct ins_ops *ins__find(struct arch *arch, const char *name);
38 static void ins__sort(struct arch *arch);
39 static int disasm_line__parse(char *line, const char **namep, char **rawp);
40
41 struct arch {
42 const char *name;
43 struct ins *instructions;
44 size_t nr_instructions;
45 size_t nr_instructions_allocated;
46 struct ins_ops *(*associate_instruction_ops)(struct arch *arch, const char *name);
47 bool sorted_instructions;
48 bool initialized;
49 void *priv;
50 unsigned int model;
51 unsigned int family;
52 int (*init)(struct arch *arch, char *cpuid);
53 bool (*ins_is_fused)(struct arch *arch, const char *ins1,
54 const char *ins2);
55 struct {
56 char comment_char;
57 char skip_functions_char;
58 } objdump;
59 };
60
61 static struct ins_ops call_ops;
62 static struct ins_ops dec_ops;
63 static struct ins_ops jump_ops;
64 static struct ins_ops mov_ops;
65 static struct ins_ops nop_ops;
66 static struct ins_ops lock_ops;
67 static struct ins_ops ret_ops;
68
69 static int arch__grow_instructions(struct arch *arch)
70 {
71 struct ins *new_instructions;
72 size_t new_nr_allocated;
73
74 if (arch->nr_instructions_allocated == 0 && arch->instructions)
75 goto grow_from_non_allocated_table;
76
77 new_nr_allocated = arch->nr_instructions_allocated + 128;
78 new_instructions = realloc(arch->instructions, new_nr_allocated * sizeof(struct ins));
79 if (new_instructions == NULL)
80 return -1;
81
82 out_update_instructions:
83 arch->instructions = new_instructions;
84 arch->nr_instructions_allocated = new_nr_allocated;
85 return 0;
86
87 grow_from_non_allocated_table:
88 new_nr_allocated = arch->nr_instructions + 128;
89 new_instructions = calloc(new_nr_allocated, sizeof(struct ins));
90 if (new_instructions == NULL)
91 return -1;
92
93 memcpy(new_instructions, arch->instructions, arch->nr_instructions);
94 goto out_update_instructions;
95 }
96
97 static int arch__associate_ins_ops(struct arch* arch, const char *name, struct ins_ops *ops)
98 {
99 struct ins *ins;
100
101 if (arch->nr_instructions == arch->nr_instructions_allocated &&
102 arch__grow_instructions(arch))
103 return -1;
104
105 ins = &arch->instructions[arch->nr_instructions];
106 ins->name = strdup(name);
107 if (!ins->name)
108 return -1;
109
110 ins->ops = ops;
111 arch->nr_instructions++;
112
113 ins__sort(arch);
114 return 0;
115 }
116
117 #include "arch/arm/annotate/instructions.c"
118 #include "arch/arm64/annotate/instructions.c"
119 #include "arch/x86/annotate/instructions.c"
120 #include "arch/powerpc/annotate/instructions.c"
121 #include "arch/s390/annotate/instructions.c"
122
123 static struct arch architectures[] = {
124 {
125 .name = "arm",
126 .init = arm__annotate_init,
127 },
128 {
129 .name = "arm64",
130 .init = arm64__annotate_init,
131 },
132 {
133 .name = "x86",
134 .init = x86__annotate_init,
135 .instructions = x86__instructions,
136 .nr_instructions = ARRAY_SIZE(x86__instructions),
137 .ins_is_fused = x86__ins_is_fused,
138 .objdump = {
139 .comment_char = '#',
140 },
141 },
142 {
143 .name = "powerpc",
144 .init = powerpc__annotate_init,
145 },
146 {
147 .name = "s390",
148 .init = s390__annotate_init,
149 .objdump = {
150 .comment_char = '#',
151 },
152 },
153 };
154
155 static void ins__delete(struct ins_operands *ops)
156 {
157 if (ops == NULL)
158 return;
159 zfree(&ops->source.raw);
160 zfree(&ops->source.name);
161 zfree(&ops->target.raw);
162 zfree(&ops->target.name);
163 }
164
165 static int ins__raw_scnprintf(struct ins *ins, char *bf, size_t size,
166 struct ins_operands *ops)
167 {
168 return scnprintf(bf, size, "%-6s %s", ins->name, ops->raw);
169 }
170
171 int ins__scnprintf(struct ins *ins, char *bf, size_t size,
172 struct ins_operands *ops)
173 {
174 if (ins->ops->scnprintf)
175 return ins->ops->scnprintf(ins, bf, size, ops);
176
177 return ins__raw_scnprintf(ins, bf, size, ops);
178 }
179
180 bool ins__is_fused(struct arch *arch, const char *ins1, const char *ins2)
181 {
182 if (!arch || !arch->ins_is_fused)
183 return false;
184
185 return arch->ins_is_fused(arch, ins1, ins2);
186 }
187
188 static int call__parse(struct arch *arch, struct ins_operands *ops, struct map *map)
189 {
190 char *endptr, *tok, *name;
191
192 ops->target.addr = strtoull(ops->raw, &endptr, 16);
193
194 name = strchr(endptr, '<');
195 if (name == NULL)
196 goto indirect_call;
197
198 name++;
199
200 if (arch->objdump.skip_functions_char &&
201 strchr(name, arch->objdump.skip_functions_char))
202 return -1;
203
204 tok = strchr(name, '>');
205 if (tok == NULL)
206 return -1;
207
208 *tok = '\0';
209 ops->target.name = strdup(name);
210 *tok = '>';
211
212 return ops->target.name == NULL ? -1 : 0;
213
214 indirect_call:
215 tok = strchr(endptr, '*');
216 if (tok == NULL) {
217 struct symbol *sym = map__find_symbol(map, map->map_ip(map, ops->target.addr));
218 if (sym != NULL)
219 ops->target.name = strdup(sym->name);
220 else
221 ops->target.addr = 0;
222 return 0;
223 }
224
225 ops->target.addr = strtoull(tok + 1, NULL, 16);
226 return 0;
227 }
228
229 static int call__scnprintf(struct ins *ins, char *bf, size_t size,
230 struct ins_operands *ops)
231 {
232 if (ops->target.name)
233 return scnprintf(bf, size, "%-6s %s", ins->name, ops->target.name);
234
235 if (ops->target.addr == 0)
236 return ins__raw_scnprintf(ins, bf, size, ops);
237
238 return scnprintf(bf, size, "%-6s *%" PRIx64, ins->name, ops->target.addr);
239 }
240
241 static struct ins_ops call_ops = {
242 .parse = call__parse,
243 .scnprintf = call__scnprintf,
244 };
245
246 bool ins__is_call(const struct ins *ins)
247 {
248 return ins->ops == &call_ops;
249 }
250
251 static int jump__parse(struct arch *arch __maybe_unused, struct ins_operands *ops, struct map *map __maybe_unused)
252 {
253 const char *s = strchr(ops->raw, '+');
254 const char *c = strchr(ops->raw, ',');
255
256 /*
257 * skip over possible up to 2 operands to get to address, e.g.:
258 * tbnz w0, #26, ffff0000083cd190 <security_file_permission+0xd0>
259 */
260 if (c++ != NULL) {
261 ops->target.addr = strtoull(c, NULL, 16);
262 if (!ops->target.addr) {
263 c = strchr(c, ',');
264 if (c++ != NULL)
265 ops->target.addr = strtoull(c, NULL, 16);
266 }
267 } else {
268 ops->target.addr = strtoull(ops->raw, NULL, 16);
269 }
270
271 if (s++ != NULL) {
272 ops->target.offset = strtoull(s, NULL, 16);
273 ops->target.offset_avail = true;
274 } else {
275 ops->target.offset_avail = false;
276 }
277
278 return 0;
279 }
280
281 static int jump__scnprintf(struct ins *ins, char *bf, size_t size,
282 struct ins_operands *ops)
283 {
284 const char *c = strchr(ops->raw, ',');
285
286 if (!ops->target.addr || ops->target.offset < 0)
287 return ins__raw_scnprintf(ins, bf, size, ops);
288
289 if (c != NULL) {
290 const char *c2 = strchr(c + 1, ',');
291
292 /* check for 3-op insn */
293 if (c2 != NULL)
294 c = c2;
295 c++;
296
297 /* mirror arch objdump's space-after-comma style */
298 if (*c == ' ')
299 c++;
300 }
301
302 return scnprintf(bf, size, "%-6s %.*s%" PRIx64,
303 ins->name, c ? c - ops->raw : 0, ops->raw,
304 ops->target.offset);
305 }
306
307 static struct ins_ops jump_ops = {
308 .parse = jump__parse,
309 .scnprintf = jump__scnprintf,
310 };
311
312 bool ins__is_jump(const struct ins *ins)
313 {
314 return ins->ops == &jump_ops;
315 }
316
317 static int comment__symbol(char *raw, char *comment, u64 *addrp, char **namep)
318 {
319 char *endptr, *name, *t;
320
321 if (strstr(raw, "(%rip)") == NULL)
322 return 0;
323
324 *addrp = strtoull(comment, &endptr, 16);
325 name = strchr(endptr, '<');
326 if (name == NULL)
327 return -1;
328
329 name++;
330
331 t = strchr(name, '>');
332 if (t == NULL)
333 return 0;
334
335 *t = '\0';
336 *namep = strdup(name);
337 *t = '>';
338
339 return 0;
340 }
341
342 static int lock__parse(struct arch *arch, struct ins_operands *ops, struct map *map)
343 {
344 ops->locked.ops = zalloc(sizeof(*ops->locked.ops));
345 if (ops->locked.ops == NULL)
346 return 0;
347
348 if (disasm_line__parse(ops->raw, &ops->locked.ins.name, &ops->locked.ops->raw) < 0)
349 goto out_free_ops;
350
351 ops->locked.ins.ops = ins__find(arch, ops->locked.ins.name);
352
353 if (ops->locked.ins.ops == NULL)
354 goto out_free_ops;
355
356 if (ops->locked.ins.ops->parse &&
357 ops->locked.ins.ops->parse(arch, ops->locked.ops, map) < 0)
358 goto out_free_ops;
359
360 return 0;
361
362 out_free_ops:
363 zfree(&ops->locked.ops);
364 return 0;
365 }
366
367 static int lock__scnprintf(struct ins *ins, char *bf, size_t size,
368 struct ins_operands *ops)
369 {
370 int printed;
371
372 if (ops->locked.ins.ops == NULL)
373 return ins__raw_scnprintf(ins, bf, size, ops);
374
375 printed = scnprintf(bf, size, "%-6s ", ins->name);
376 return printed + ins__scnprintf(&ops->locked.ins, bf + printed,
377 size - printed, ops->locked.ops);
378 }
379
380 static void lock__delete(struct ins_operands *ops)
381 {
382 struct ins *ins = &ops->locked.ins;
383
384 if (ins->ops && ins->ops->free)
385 ins->ops->free(ops->locked.ops);
386 else
387 ins__delete(ops->locked.ops);
388
389 zfree(&ops->locked.ops);
390 zfree(&ops->target.raw);
391 zfree(&ops->target.name);
392 }
393
394 static struct ins_ops lock_ops = {
395 .free = lock__delete,
396 .parse = lock__parse,
397 .scnprintf = lock__scnprintf,
398 };
399
400 static int mov__parse(struct arch *arch, struct ins_operands *ops, struct map *map __maybe_unused)
401 {
402 char *s = strchr(ops->raw, ','), *target, *comment, prev;
403
404 if (s == NULL)
405 return -1;
406
407 *s = '\0';
408 ops->source.raw = strdup(ops->raw);
409 *s = ',';
410
411 if (ops->source.raw == NULL)
412 return -1;
413
414 target = ++s;
415 comment = strchr(s, arch->objdump.comment_char);
416
417 if (comment != NULL)
418 s = comment - 1;
419 else
420 s = strchr(s, '\0') - 1;
421
422 while (s > target && isspace(s[0]))
423 --s;
424 s++;
425 prev = *s;
426 *s = '\0';
427
428 ops->target.raw = strdup(target);
429 *s = prev;
430
431 if (ops->target.raw == NULL)
432 goto out_free_source;
433
434 if (comment == NULL)
435 return 0;
436
437 comment = ltrim(comment);
438 comment__symbol(ops->source.raw, comment, &ops->source.addr, &ops->source.name);
439 comment__symbol(ops->target.raw, comment, &ops->target.addr, &ops->target.name);
440
441 return 0;
442
443 out_free_source:
444 zfree(&ops->source.raw);
445 return -1;
446 }
447
448 static int mov__scnprintf(struct ins *ins, char *bf, size_t size,
449 struct ins_operands *ops)
450 {
451 return scnprintf(bf, size, "%-6s %s,%s", ins->name,
452 ops->source.name ?: ops->source.raw,
453 ops->target.name ?: ops->target.raw);
454 }
455
456 static struct ins_ops mov_ops = {
457 .parse = mov__parse,
458 .scnprintf = mov__scnprintf,
459 };
460
461 static int dec__parse(struct arch *arch __maybe_unused, struct ins_operands *ops, struct map *map __maybe_unused)
462 {
463 char *target, *comment, *s, prev;
464
465 target = s = ops->raw;
466
467 while (s[0] != '\0' && !isspace(s[0]))
468 ++s;
469 prev = *s;
470 *s = '\0';
471
472 ops->target.raw = strdup(target);
473 *s = prev;
474
475 if (ops->target.raw == NULL)
476 return -1;
477
478 comment = strchr(s, arch->objdump.comment_char);
479 if (comment == NULL)
480 return 0;
481
482 comment = ltrim(comment);
483 comment__symbol(ops->target.raw, comment, &ops->target.addr, &ops->target.name);
484
485 return 0;
486 }
487
488 static int dec__scnprintf(struct ins *ins, char *bf, size_t size,
489 struct ins_operands *ops)
490 {
491 return scnprintf(bf, size, "%-6s %s", ins->name,
492 ops->target.name ?: ops->target.raw);
493 }
494
495 static struct ins_ops dec_ops = {
496 .parse = dec__parse,
497 .scnprintf = dec__scnprintf,
498 };
499
500 static int nop__scnprintf(struct ins *ins __maybe_unused, char *bf, size_t size,
501 struct ins_operands *ops __maybe_unused)
502 {
503 return scnprintf(bf, size, "%-6s", "nop");
504 }
505
506 static struct ins_ops nop_ops = {
507 .scnprintf = nop__scnprintf,
508 };
509
510 static struct ins_ops ret_ops = {
511 .scnprintf = ins__raw_scnprintf,
512 };
513
514 bool ins__is_ret(const struct ins *ins)
515 {
516 return ins->ops == &ret_ops;
517 }
518
519 bool ins__is_lock(const struct ins *ins)
520 {
521 return ins->ops == &lock_ops;
522 }
523
524 static int ins__key_cmp(const void *name, const void *insp)
525 {
526 const struct ins *ins = insp;
527
528 return strcmp(name, ins->name);
529 }
530
531 static int ins__cmp(const void *a, const void *b)
532 {
533 const struct ins *ia = a;
534 const struct ins *ib = b;
535
536 return strcmp(ia->name, ib->name);
537 }
538
539 static void ins__sort(struct arch *arch)
540 {
541 const int nmemb = arch->nr_instructions;
542
543 qsort(arch->instructions, nmemb, sizeof(struct ins), ins__cmp);
544 }
545
546 static struct ins_ops *__ins__find(struct arch *arch, const char *name)
547 {
548 struct ins *ins;
549 const int nmemb = arch->nr_instructions;
550
551 if (!arch->sorted_instructions) {
552 ins__sort(arch);
553 arch->sorted_instructions = true;
554 }
555
556 ins = bsearch(name, arch->instructions, nmemb, sizeof(struct ins), ins__key_cmp);
557 return ins ? ins->ops : NULL;
558 }
559
560 static struct ins_ops *ins__find(struct arch *arch, const char *name)
561 {
562 struct ins_ops *ops = __ins__find(arch, name);
563
564 if (!ops && arch->associate_instruction_ops)
565 ops = arch->associate_instruction_ops(arch, name);
566
567 return ops;
568 }
569
570 static int arch__key_cmp(const void *name, const void *archp)
571 {
572 const struct arch *arch = archp;
573
574 return strcmp(name, arch->name);
575 }
576
577 static int arch__cmp(const void *a, const void *b)
578 {
579 const struct arch *aa = a;
580 const struct arch *ab = b;
581
582 return strcmp(aa->name, ab->name);
583 }
584
585 static void arch__sort(void)
586 {
587 const int nmemb = ARRAY_SIZE(architectures);
588
589 qsort(architectures, nmemb, sizeof(struct arch), arch__cmp);
590 }
591
592 static struct arch *arch__find(const char *name)
593 {
594 const int nmemb = ARRAY_SIZE(architectures);
595 static bool sorted;
596
597 if (!sorted) {
598 arch__sort();
599 sorted = true;
600 }
601
602 return bsearch(name, architectures, nmemb, sizeof(struct arch), arch__key_cmp);
603 }
604
605 int symbol__alloc_hist(struct symbol *sym)
606 {
607 struct annotation *notes = symbol__annotation(sym);
608 size_t size = symbol__size(sym);
609 size_t sizeof_sym_hist;
610
611 /*
612 * Add buffer of one element for zero length symbol.
613 * When sample is taken from first instruction of
614 * zero length symbol, perf still resolves it and
615 * shows symbol name in perf report and allows to
616 * annotate it.
617 */
618 if (size == 0)
619 size = 1;
620
621 /* Check for overflow when calculating sizeof_sym_hist */
622 if (size > (SIZE_MAX - sizeof(struct sym_hist)) / sizeof(struct sym_hist_entry))
623 return -1;
624
625 sizeof_sym_hist = (sizeof(struct sym_hist) + size * sizeof(struct sym_hist_entry));
626
627 /* Check for overflow in zalloc argument */
628 if (sizeof_sym_hist > (SIZE_MAX - sizeof(*notes->src))
629 / symbol_conf.nr_events)
630 return -1;
631
632 notes->src = zalloc(sizeof(*notes->src) + symbol_conf.nr_events * sizeof_sym_hist);
633 if (notes->src == NULL)
634 return -1;
635 notes->src->sizeof_sym_hist = sizeof_sym_hist;
636 notes->src->nr_histograms = symbol_conf.nr_events;
637 INIT_LIST_HEAD(&notes->src->source);
638 return 0;
639 }
640
641 /* The cycles histogram is lazily allocated. */
642 static int symbol__alloc_hist_cycles(struct symbol *sym)
643 {
644 struct annotation *notes = symbol__annotation(sym);
645 const size_t size = symbol__size(sym);
646
647 notes->src->cycles_hist = calloc(size, sizeof(struct cyc_hist));
648 if (notes->src->cycles_hist == NULL)
649 return -1;
650 return 0;
651 }
652
653 void symbol__annotate_zero_histograms(struct symbol *sym)
654 {
655 struct annotation *notes = symbol__annotation(sym);
656
657 pthread_mutex_lock(&notes->lock);
658 if (notes->src != NULL) {
659 memset(notes->src->histograms, 0,
660 notes->src->nr_histograms * notes->src->sizeof_sym_hist);
661 if (notes->src->cycles_hist)
662 memset(notes->src->cycles_hist, 0,
663 symbol__size(sym) * sizeof(struct cyc_hist));
664 }
665 pthread_mutex_unlock(&notes->lock);
666 }
667
668 static int __symbol__account_cycles(struct annotation *notes,
669 u64 start,
670 unsigned offset, unsigned cycles,
671 unsigned have_start)
672 {
673 struct cyc_hist *ch;
674
675 ch = notes->src->cycles_hist;
676 /*
677 * For now we can only account one basic block per
678 * final jump. But multiple could be overlapping.
679 * Always account the longest one. So when
680 * a shorter one has been already seen throw it away.
681 *
682 * We separately always account the full cycles.
683 */
684 ch[offset].num_aggr++;
685 ch[offset].cycles_aggr += cycles;
686
687 if (!have_start && ch[offset].have_start)
688 return 0;
689 if (ch[offset].num) {
690 if (have_start && (!ch[offset].have_start ||
691 ch[offset].start > start)) {
692 ch[offset].have_start = 0;
693 ch[offset].cycles = 0;
694 ch[offset].num = 0;
695 if (ch[offset].reset < 0xffff)
696 ch[offset].reset++;
697 } else if (have_start &&
698 ch[offset].start < start)
699 return 0;
700 }
701 ch[offset].have_start = have_start;
702 ch[offset].start = start;
703 ch[offset].cycles += cycles;
704 ch[offset].num++;
705 return 0;
706 }
707
708 static int __symbol__inc_addr_samples(struct symbol *sym, struct map *map,
709 struct annotation *notes, int evidx, u64 addr,
710 struct perf_sample *sample)
711 {
712 unsigned offset;
713 struct sym_hist *h;
714
715 pr_debug3("%s: addr=%#" PRIx64 "\n", __func__, map->unmap_ip(map, addr));
716
717 if ((addr < sym->start || addr >= sym->end) &&
718 (addr != sym->end || sym->start != sym->end)) {
719 pr_debug("%s(%d): ERANGE! sym->name=%s, start=%#" PRIx64 ", addr=%#" PRIx64 ", end=%#" PRIx64 "\n",
720 __func__, __LINE__, sym->name, sym->start, addr, sym->end);
721 return -ERANGE;
722 }
723
724 offset = addr - sym->start;
725 h = annotation__histogram(notes, evidx);
726 h->nr_samples++;
727 h->addr[offset].nr_samples++;
728 h->period += sample->period;
729 h->addr[offset].period += sample->period;
730
731 pr_debug3("%#" PRIx64 " %s: period++ [addr: %#" PRIx64 ", %#" PRIx64
732 ", evidx=%d] => nr_samples: %" PRIu64 ", period: %" PRIu64 "\n",
733 sym->start, sym->name, addr, addr - sym->start, evidx,
734 h->addr[offset].nr_samples, h->addr[offset].period);
735 return 0;
736 }
737
738 static struct annotation *symbol__get_annotation(struct symbol *sym, bool cycles)
739 {
740 struct annotation *notes = symbol__annotation(sym);
741
742 if (notes->src == NULL) {
743 if (symbol__alloc_hist(sym) < 0)
744 return NULL;
745 }
746 if (!notes->src->cycles_hist && cycles) {
747 if (symbol__alloc_hist_cycles(sym) < 0)
748 return NULL;
749 }
750 return notes;
751 }
752
753 static int symbol__inc_addr_samples(struct symbol *sym, struct map *map,
754 int evidx, u64 addr,
755 struct perf_sample *sample)
756 {
757 struct annotation *notes;
758
759 if (sym == NULL)
760 return 0;
761 notes = symbol__get_annotation(sym, false);
762 if (notes == NULL)
763 return -ENOMEM;
764 return __symbol__inc_addr_samples(sym, map, notes, evidx, addr, sample);
765 }
766
767 static int symbol__account_cycles(u64 addr, u64 start,
768 struct symbol *sym, unsigned cycles)
769 {
770 struct annotation *notes;
771 unsigned offset;
772
773 if (sym == NULL)
774 return 0;
775 notes = symbol__get_annotation(sym, true);
776 if (notes == NULL)
777 return -ENOMEM;
778 if (addr < sym->start || addr >= sym->end)
779 return -ERANGE;
780
781 if (start) {
782 if (start < sym->start || start >= sym->end)
783 return -ERANGE;
784 if (start >= addr)
785 start = 0;
786 }
787 offset = addr - sym->start;
788 return __symbol__account_cycles(notes,
789 start ? start - sym->start : 0,
790 offset, cycles,
791 !!start);
792 }
793
794 int addr_map_symbol__account_cycles(struct addr_map_symbol *ams,
795 struct addr_map_symbol *start,
796 unsigned cycles)
797 {
798 u64 saddr = 0;
799 int err;
800
801 if (!cycles)
802 return 0;
803
804 /*
805 * Only set start when IPC can be computed. We can only
806 * compute it when the basic block is completely in a single
807 * function.
808 * Special case the case when the jump is elsewhere, but
809 * it starts on the function start.
810 */
811 if (start &&
812 (start->sym == ams->sym ||
813 (ams->sym &&
814 start->addr == ams->sym->start + ams->map->start)))
815 saddr = start->al_addr;
816 if (saddr == 0)
817 pr_debug2("BB with bad start: addr %"PRIx64" start %"PRIx64" sym %"PRIx64" saddr %"PRIx64"\n",
818 ams->addr,
819 start ? start->addr : 0,
820 ams->sym ? ams->sym->start + ams->map->start : 0,
821 saddr);
822 err = symbol__account_cycles(ams->al_addr, saddr, ams->sym, cycles);
823 if (err)
824 pr_debug2("account_cycles failed %d\n", err);
825 return err;
826 }
827
828 int addr_map_symbol__inc_samples(struct addr_map_symbol *ams, struct perf_sample *sample,
829 int evidx)
830 {
831 return symbol__inc_addr_samples(ams->sym, ams->map, evidx, ams->al_addr, sample);
832 }
833
834 int hist_entry__inc_addr_samples(struct hist_entry *he, struct perf_sample *sample,
835 int evidx, u64 ip)
836 {
837 return symbol__inc_addr_samples(he->ms.sym, he->ms.map, evidx, ip, sample);
838 }
839
840 static void disasm_line__init_ins(struct disasm_line *dl, struct arch *arch, struct map *map)
841 {
842 dl->ins.ops = ins__find(arch, dl->ins.name);
843
844 if (!dl->ins.ops)
845 return;
846
847 if (dl->ins.ops->parse && dl->ins.ops->parse(arch, &dl->ops, map) < 0)
848 dl->ins.ops = NULL;
849 }
850
851 static int disasm_line__parse(char *line, const char **namep, char **rawp)
852 {
853 char tmp, *name = ltrim(line);
854
855 if (name[0] == '\0')
856 return -1;
857
858 *rawp = name + 1;
859
860 while ((*rawp)[0] != '\0' && !isspace((*rawp)[0]))
861 ++*rawp;
862
863 tmp = (*rawp)[0];
864 (*rawp)[0] = '\0';
865 *namep = strdup(name);
866
867 if (*namep == NULL)
868 goto out_free_name;
869
870 (*rawp)[0] = tmp;
871 *rawp = ltrim(*rawp);
872
873 return 0;
874
875 out_free_name:
876 free((void *)namep);
877 *namep = NULL;
878 return -1;
879 }
880
881 static struct disasm_line *disasm_line__new(s64 offset, char *line,
882 size_t privsize, int line_nr,
883 struct arch *arch,
884 struct map *map)
885 {
886 struct disasm_line *dl = zalloc(sizeof(*dl) + privsize);
887
888 if (dl != NULL) {
889 dl->offset = offset;
890 dl->line = strdup(line);
891 dl->line_nr = line_nr;
892 if (dl->line == NULL)
893 goto out_delete;
894
895 if (offset != -1) {
896 if (disasm_line__parse(dl->line, &dl->ins.name, &dl->ops.raw) < 0)
897 goto out_free_line;
898
899 disasm_line__init_ins(dl, arch, map);
900 }
901 }
902
903 return dl;
904
905 out_free_line:
906 zfree(&dl->line);
907 out_delete:
908 free(dl);
909 return NULL;
910 }
911
912 void disasm_line__free(struct disasm_line *dl)
913 {
914 zfree(&dl->line);
915 if (dl->ins.ops && dl->ins.ops->free)
916 dl->ins.ops->free(&dl->ops);
917 else
918 ins__delete(&dl->ops);
919 free((void *)dl->ins.name);
920 dl->ins.name = NULL;
921 free(dl);
922 }
923
924 int disasm_line__scnprintf(struct disasm_line *dl, char *bf, size_t size, bool raw)
925 {
926 if (raw || !dl->ins.ops)
927 return scnprintf(bf, size, "%-6s %s", dl->ins.name, dl->ops.raw);
928
929 return ins__scnprintf(&dl->ins, bf, size, &dl->ops);
930 }
931
932 static void disasm__add(struct list_head *head, struct disasm_line *line)
933 {
934 list_add_tail(&line->node, head);
935 }
936
937 struct disasm_line *disasm__get_next_ip_line(struct list_head *head, struct disasm_line *pos)
938 {
939 list_for_each_entry_continue(pos, head, node)
940 if (pos->offset >= 0)
941 return pos;
942
943 return NULL;
944 }
945
946 double disasm__calc_percent(struct annotation *notes, int evidx, s64 offset,
947 s64 end, const char **path, struct sym_hist_entry *sample)
948 {
949 struct source_line *src_line = notes->src->lines;
950 double percent = 0.0;
951
952 sample->nr_samples = sample->period = 0;
953
954 if (src_line) {
955 size_t sizeof_src_line = sizeof(*src_line) +
956 sizeof(src_line->samples) * (src_line->nr_pcnt - 1);
957
958 while (offset < end) {
959 src_line = (void *)notes->src->lines +
960 (sizeof_src_line * offset);
961
962 if (*path == NULL)
963 *path = src_line->path;
964
965 percent += src_line->samples[evidx].percent;
966 sample->nr_samples += src_line->samples[evidx].nr;
967 offset++;
968 }
969 } else {
970 struct sym_hist *h = annotation__histogram(notes, evidx);
971 unsigned int hits = 0;
972 u64 period = 0;
973
974 while (offset < end) {
975 hits += h->addr[offset].nr_samples;
976 period += h->addr[offset].period;
977 ++offset;
978 }
979
980 if (h->nr_samples) {
981 sample->period = period;
982 sample->nr_samples = hits;
983 percent = 100.0 * hits / h->nr_samples;
984 }
985 }
986
987 return percent;
988 }
989
990 static const char *annotate__address_color(struct block_range *br)
991 {
992 double cov = block_range__coverage(br);
993
994 if (cov >= 0) {
995 /* mark red for >75% coverage */
996 if (cov > 0.75)
997 return PERF_COLOR_RED;
998
999 /* mark dull for <1% coverage */
1000 if (cov < 0.01)
1001 return PERF_COLOR_NORMAL;
1002 }
1003
1004 return PERF_COLOR_MAGENTA;
1005 }
1006
1007 static const char *annotate__asm_color(struct block_range *br)
1008 {
1009 double cov = block_range__coverage(br);
1010
1011 if (cov >= 0) {
1012 /* mark dull for <1% coverage */
1013 if (cov < 0.01)
1014 return PERF_COLOR_NORMAL;
1015 }
1016
1017 return PERF_COLOR_BLUE;
1018 }
1019
1020 static void annotate__branch_printf(struct block_range *br, u64 addr)
1021 {
1022 bool emit_comment = true;
1023
1024 if (!br)
1025 return;
1026
1027 #if 1
1028 if (br->is_target && br->start == addr) {
1029 struct block_range *branch = br;
1030 double p;
1031
1032 /*
1033 * Find matching branch to our target.
1034 */
1035 while (!branch->is_branch)
1036 branch = block_range__next(branch);
1037
1038 p = 100 *(double)br->entry / branch->coverage;
1039
1040 if (p > 0.1) {
1041 if (emit_comment) {
1042 emit_comment = false;
1043 printf("\t#");
1044 }
1045
1046 /*
1047 * The percentage of coverage joined at this target in relation
1048 * to the next branch.
1049 */
1050 printf(" +%.2f%%", p);
1051 }
1052 }
1053 #endif
1054 if (br->is_branch && br->end == addr) {
1055 double p = 100*(double)br->taken / br->coverage;
1056
1057 if (p > 0.1) {
1058 if (emit_comment) {
1059 emit_comment = false;
1060 printf("\t#");
1061 }
1062
1063 /*
1064 * The percentage of coverage leaving at this branch, and
1065 * its prediction ratio.
1066 */
1067 printf(" -%.2f%% (p:%.2f%%)", p, 100*(double)br->pred / br->taken);
1068 }
1069 }
1070 }
1071
1072
1073 static int disasm_line__print(struct disasm_line *dl, struct symbol *sym, u64 start,
1074 struct perf_evsel *evsel, u64 len, int min_pcnt, int printed,
1075 int max_lines, struct disasm_line *queue)
1076 {
1077 static const char *prev_line;
1078 static const char *prev_color;
1079
1080 if (dl->offset != -1) {
1081 const char *path = NULL;
1082 double percent, max_percent = 0.0;
1083 double *ppercents = &percent;
1084 struct sym_hist_entry sample;
1085 struct sym_hist_entry *psamples = &sample;
1086 int i, nr_percent = 1;
1087 const char *color;
1088 struct annotation *notes = symbol__annotation(sym);
1089 s64 offset = dl->offset;
1090 const u64 addr = start + offset;
1091 struct disasm_line *next;
1092 struct block_range *br;
1093
1094 next = disasm__get_next_ip_line(&notes->src->source, dl);
1095
1096 if (perf_evsel__is_group_event(evsel)) {
1097 nr_percent = evsel->nr_members;
1098 ppercents = calloc(nr_percent, sizeof(double));
1099 psamples = calloc(nr_percent, sizeof(struct sym_hist_entry));
1100 if (ppercents == NULL || psamples == NULL) {
1101 return -1;
1102 }
1103 }
1104
1105 for (i = 0; i < nr_percent; i++) {
1106 percent = disasm__calc_percent(notes,
1107 notes->src->lines ? i : evsel->idx + i,
1108 offset,
1109 next ? next->offset : (s64) len,
1110 &path, &sample);
1111
1112 ppercents[i] = percent;
1113 psamples[i] = sample;
1114 if (percent > max_percent)
1115 max_percent = percent;
1116 }
1117
1118 if (max_percent < min_pcnt)
1119 return -1;
1120
1121 if (max_lines && printed >= max_lines)
1122 return 1;
1123
1124 if (queue != NULL) {
1125 list_for_each_entry_from(queue, &notes->src->source, node) {
1126 if (queue == dl)
1127 break;
1128 disasm_line__print(queue, sym, start, evsel, len,
1129 0, 0, 1, NULL);
1130 }
1131 }
1132
1133 color = get_percent_color(max_percent);
1134
1135 /*
1136 * Also color the filename and line if needed, with
1137 * the same color than the percentage. Don't print it
1138 * twice for close colored addr with the same filename:line
1139 */
1140 if (path) {
1141 if (!prev_line || strcmp(prev_line, path)
1142 || color != prev_color) {
1143 color_fprintf(stdout, color, " %s", path);
1144 prev_line = path;
1145 prev_color = color;
1146 }
1147 }
1148
1149 for (i = 0; i < nr_percent; i++) {
1150 percent = ppercents[i];
1151 sample = psamples[i];
1152 color = get_percent_color(percent);
1153
1154 if (symbol_conf.show_total_period)
1155 color_fprintf(stdout, color, " %11" PRIu64,
1156 sample.period);
1157 else if (symbol_conf.show_nr_samples)
1158 color_fprintf(stdout, color, " %7" PRIu64,
1159 sample.nr_samples);
1160 else
1161 color_fprintf(stdout, color, " %7.2f", percent);
1162 }
1163
1164 printf(" : ");
1165
1166 br = block_range__find(addr);
1167 color_fprintf(stdout, annotate__address_color(br), " %" PRIx64 ":", addr);
1168 color_fprintf(stdout, annotate__asm_color(br), "%s", dl->line);
1169 annotate__branch_printf(br, addr);
1170 printf("\n");
1171
1172 if (ppercents != &percent)
1173 free(ppercents);
1174
1175 if (psamples != &sample)
1176 free(psamples);
1177
1178 } else if (max_lines && printed >= max_lines)
1179 return 1;
1180 else {
1181 int width = symbol_conf.show_total_period ? 12 : 8;
1182
1183 if (queue)
1184 return -1;
1185
1186 if (perf_evsel__is_group_event(evsel))
1187 width *= evsel->nr_members;
1188
1189 if (!*dl->line)
1190 printf(" %*s:\n", width, " ");
1191 else
1192 printf(" %*s: %s\n", width, " ", dl->line);
1193 }
1194
1195 return 0;
1196 }
1197
1198 /*
1199 * symbol__parse_objdump_line() parses objdump output (with -d --no-show-raw)
1200 * which looks like following
1201 *
1202 * 0000000000415500 <_init>:
1203 * 415500: sub $0x8,%rsp
1204 * 415504: mov 0x2f5ad5(%rip),%rax # 70afe0 <_DYNAMIC+0x2f8>
1205 * 41550b: test %rax,%rax
1206 * 41550e: je 415515 <_init+0x15>
1207 * 415510: callq 416e70 <__gmon_start__@plt>
1208 * 415515: add $0x8,%rsp
1209 * 415519: retq
1210 *
1211 * it will be parsed and saved into struct disasm_line as
1212 * <offset> <name> <ops.raw>
1213 *
1214 * The offset will be a relative offset from the start of the symbol and -1
1215 * means that it's not a disassembly line so should be treated differently.
1216 * The ops.raw part will be parsed further according to type of the instruction.
1217 */
1218 static int symbol__parse_objdump_line(struct symbol *sym, struct map *map,
1219 struct arch *arch,
1220 FILE *file, size_t privsize,
1221 int *line_nr)
1222 {
1223 struct annotation *notes = symbol__annotation(sym);
1224 struct disasm_line *dl;
1225 char *line = NULL, *parsed_line, *tmp, *tmp2;
1226 size_t line_len;
1227 s64 line_ip, offset = -1;
1228 regmatch_t match[2];
1229
1230 if (getline(&line, &line_len, file) < 0)
1231 return -1;
1232
1233 if (!line)
1234 return -1;
1235
1236 line_ip = -1;
1237 parsed_line = rtrim(line);
1238
1239 /* /filename:linenr ? Save line number and ignore. */
1240 if (regexec(&file_lineno, parsed_line, 2, match, 0) == 0) {
1241 *line_nr = atoi(parsed_line + match[1].rm_so);
1242 return 0;
1243 }
1244
1245 tmp = ltrim(parsed_line);
1246 if (*tmp) {
1247 /*
1248 * Parse hexa addresses followed by ':'
1249 */
1250 line_ip = strtoull(tmp, &tmp2, 16);
1251 if (*tmp2 != ':' || tmp == tmp2 || tmp2[1] == '\0')
1252 line_ip = -1;
1253 }
1254
1255 if (line_ip != -1) {
1256 u64 start = map__rip_2objdump(map, sym->start),
1257 end = map__rip_2objdump(map, sym->end);
1258
1259 offset = line_ip - start;
1260 if ((u64)line_ip < start || (u64)line_ip >= end)
1261 offset = -1;
1262 else
1263 parsed_line = tmp2 + 1;
1264 }
1265
1266 dl = disasm_line__new(offset, parsed_line, privsize, *line_nr, arch, map);
1267 free(line);
1268 (*line_nr)++;
1269
1270 if (dl == NULL)
1271 return -1;
1272
1273 if (!disasm_line__has_offset(dl)) {
1274 dl->ops.target.offset = dl->ops.target.addr -
1275 map__rip_2objdump(map, sym->start);
1276 dl->ops.target.offset_avail = true;
1277 }
1278
1279 /* kcore has no symbols, so add the call target name */
1280 if (dl->ins.ops && ins__is_call(&dl->ins) && !dl->ops.target.name) {
1281 struct addr_map_symbol target = {
1282 .map = map,
1283 .addr = dl->ops.target.addr,
1284 };
1285
1286 if (!map_groups__find_ams(&target) &&
1287 target.sym->start == target.al_addr)
1288 dl->ops.target.name = strdup(target.sym->name);
1289 }
1290
1291 disasm__add(&notes->src->source, dl);
1292
1293 return 0;
1294 }
1295
1296 static __attribute__((constructor)) void symbol__init_regexpr(void)
1297 {
1298 regcomp(&file_lineno, "^/[^:]+:([0-9]+)", REG_EXTENDED);
1299 }
1300
1301 static void delete_last_nop(struct symbol *sym)
1302 {
1303 struct annotation *notes = symbol__annotation(sym);
1304 struct list_head *list = &notes->src->source;
1305 struct disasm_line *dl;
1306
1307 while (!list_empty(list)) {
1308 dl = list_entry(list->prev, struct disasm_line, node);
1309
1310 if (dl->ins.ops) {
1311 if (dl->ins.ops != &nop_ops)
1312 return;
1313 } else {
1314 if (!strstr(dl->line, " nop ") &&
1315 !strstr(dl->line, " nopl ") &&
1316 !strstr(dl->line, " nopw "))
1317 return;
1318 }
1319
1320 list_del(&dl->node);
1321 disasm_line__free(dl);
1322 }
1323 }
1324
1325 int symbol__strerror_disassemble(struct symbol *sym __maybe_unused, struct map *map,
1326 int errnum, char *buf, size_t buflen)
1327 {
1328 struct dso *dso = map->dso;
1329
1330 BUG_ON(buflen == 0);
1331
1332 if (errnum >= 0) {
1333 str_error_r(errnum, buf, buflen);
1334 return 0;
1335 }
1336
1337 switch (errnum) {
1338 case SYMBOL_ANNOTATE_ERRNO__NO_VMLINUX: {
1339 char bf[SBUILD_ID_SIZE + 15] = " with build id ";
1340 char *build_id_msg = NULL;
1341
1342 if (dso->has_build_id) {
1343 build_id__sprintf(dso->build_id,
1344 sizeof(dso->build_id), bf + 15);
1345 build_id_msg = bf;
1346 }
1347 scnprintf(buf, buflen,
1348 "No vmlinux file%s\nwas found in the path.\n\n"
1349 "Note that annotation using /proc/kcore requires CAP_SYS_RAWIO capability.\n\n"
1350 "Please use:\n\n"
1351 " perf buildid-cache -vu vmlinux\n\n"
1352 "or:\n\n"
1353 " --vmlinux vmlinux\n", build_id_msg ?: "");
1354 }
1355 break;
1356 default:
1357 scnprintf(buf, buflen, "Internal error: Invalid %d error code\n", errnum);
1358 break;
1359 }
1360
1361 return 0;
1362 }
1363
1364 static int dso__disassemble_filename(struct dso *dso, char *filename, size_t filename_size)
1365 {
1366 char linkname[PATH_MAX];
1367 char *build_id_filename;
1368 char *build_id_path = NULL;
1369 char *pos;
1370
1371 if (dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS &&
1372 !dso__is_kcore(dso))
1373 return SYMBOL_ANNOTATE_ERRNO__NO_VMLINUX;
1374
1375 build_id_filename = dso__build_id_filename(dso, NULL, 0, false);
1376 if (build_id_filename) {
1377 __symbol__join_symfs(filename, filename_size, build_id_filename);
1378 free(build_id_filename);
1379 } else {
1380 if (dso->has_build_id)
1381 return ENOMEM;
1382 goto fallback;
1383 }
1384
1385 build_id_path = strdup(filename);
1386 if (!build_id_path)
1387 return -1;
1388
1389 /*
1390 * old style build-id cache has name of XX/XXXXXXX.. while
1391 * new style has XX/XXXXXXX../{elf,kallsyms,vdso}.
1392 * extract the build-id part of dirname in the new style only.
1393 */
1394 pos = strrchr(build_id_path, '/');
1395 if (pos && strlen(pos) < SBUILD_ID_SIZE - 2)
1396 dirname(build_id_path);
1397
1398 if (dso__is_kcore(dso) ||
1399 readlink(build_id_path, linkname, sizeof(linkname)) < 0 ||
1400 strstr(linkname, DSO__NAME_KALLSYMS) ||
1401 access(filename, R_OK)) {
1402 fallback:
1403 /*
1404 * If we don't have build-ids or the build-id file isn't in the
1405 * cache, or is just a kallsyms file, well, lets hope that this
1406 * DSO is the same as when 'perf record' ran.
1407 */
1408 __symbol__join_symfs(filename, filename_size, dso->long_name);
1409 }
1410
1411 free(build_id_path);
1412 return 0;
1413 }
1414
1415 static const char *annotate__norm_arch(const char *arch_name)
1416 {
1417 struct utsname uts;
1418
1419 if (!arch_name) { /* Assume we are annotating locally. */
1420 if (uname(&uts) < 0)
1421 return NULL;
1422 arch_name = uts.machine;
1423 }
1424 return normalize_arch((char *)arch_name);
1425 }
1426
1427 int symbol__disassemble(struct symbol *sym, struct map *map,
1428 const char *arch_name, size_t privsize,
1429 struct arch **parch, char *cpuid)
1430 {
1431 struct dso *dso = map->dso;
1432 char command[PATH_MAX * 2];
1433 struct arch *arch = NULL;
1434 FILE *file;
1435 char symfs_filename[PATH_MAX];
1436 struct kcore_extract kce;
1437 bool delete_extract = false;
1438 int stdout_fd[2];
1439 int lineno = 0;
1440 int nline;
1441 pid_t pid;
1442 int err = dso__disassemble_filename(dso, symfs_filename, sizeof(symfs_filename));
1443
1444 if (err)
1445 return err;
1446
1447 arch_name = annotate__norm_arch(arch_name);
1448 if (!arch_name)
1449 return -1;
1450
1451 arch = arch__find(arch_name);
1452 if (arch == NULL)
1453 return -ENOTSUP;
1454
1455 if (parch)
1456 *parch = arch;
1457
1458 if (arch->init) {
1459 err = arch->init(arch, cpuid);
1460 if (err) {
1461 pr_err("%s: failed to initialize %s arch priv area\n", __func__, arch->name);
1462 return err;
1463 }
1464 }
1465
1466 pr_debug("%s: filename=%s, sym=%s, start=%#" PRIx64 ", end=%#" PRIx64 "\n", __func__,
1467 symfs_filename, sym->name, map->unmap_ip(map, sym->start),
1468 map->unmap_ip(map, sym->end));
1469
1470 pr_debug("annotating [%p] %30s : [%p] %30s\n",
1471 dso, dso->long_name, sym, sym->name);
1472
1473 if (dso__is_kcore(dso)) {
1474 kce.kcore_filename = symfs_filename;
1475 kce.addr = map__rip_2objdump(map, sym->start);
1476 kce.offs = sym->start;
1477 kce.len = sym->end - sym->start;
1478 if (!kcore_extract__create(&kce)) {
1479 delete_extract = true;
1480 strlcpy(symfs_filename, kce.extract_filename,
1481 sizeof(symfs_filename));
1482 }
1483 } else if (dso__needs_decompress(dso)) {
1484 char tmp[KMOD_DECOMP_LEN];
1485
1486 if (dso__decompress_kmodule_path(dso, symfs_filename,
1487 tmp, sizeof(tmp)) < 0)
1488 goto out;
1489
1490 strcpy(symfs_filename, tmp);
1491 }
1492
1493 snprintf(command, sizeof(command),
1494 "%s %s%s --start-address=0x%016" PRIx64
1495 " --stop-address=0x%016" PRIx64
1496 " -l -d %s %s -C \"%s\" 2>/dev/null|grep -v \"%s:\"|expand",
1497 objdump_path ? objdump_path : "objdump",
1498 disassembler_style ? "-M " : "",
1499 disassembler_style ? disassembler_style : "",
1500 map__rip_2objdump(map, sym->start),
1501 map__rip_2objdump(map, sym->end),
1502 symbol_conf.annotate_asm_raw ? "" : "--no-show-raw",
1503 symbol_conf.annotate_src ? "-S" : "",
1504 symfs_filename, symfs_filename);
1505
1506 pr_debug("Executing: %s\n", command);
1507
1508 err = -1;
1509 if (pipe(stdout_fd) < 0) {
1510 pr_err("Failure creating the pipe to run %s\n", command);
1511 goto out_remove_tmp;
1512 }
1513
1514 pid = fork();
1515 if (pid < 0) {
1516 pr_err("Failure forking to run %s\n", command);
1517 goto out_close_stdout;
1518 }
1519
1520 if (pid == 0) {
1521 close(stdout_fd[0]);
1522 dup2(stdout_fd[1], 1);
1523 close(stdout_fd[1]);
1524 execl("/bin/sh", "sh", "-c", command, NULL);
1525 perror(command);
1526 exit(-1);
1527 }
1528
1529 close(stdout_fd[1]);
1530
1531 file = fdopen(stdout_fd[0], "r");
1532 if (!file) {
1533 pr_err("Failure creating FILE stream for %s\n", command);
1534 /*
1535 * If we were using debug info should retry with
1536 * original binary.
1537 */
1538 goto out_remove_tmp;
1539 }
1540
1541 nline = 0;
1542 while (!feof(file)) {
1543 /*
1544 * The source code line number (lineno) needs to be kept in
1545 * accross calls to symbol__parse_objdump_line(), so that it
1546 * can associate it with the instructions till the next one.
1547 * See disasm_line__new() and struct disasm_line::line_nr.
1548 */
1549 if (symbol__parse_objdump_line(sym, map, arch, file, privsize,
1550 &lineno) < 0)
1551 break;
1552 nline++;
1553 }
1554
1555 if (nline == 0)
1556 pr_err("No output from %s\n", command);
1557
1558 /*
1559 * kallsyms does not have symbol sizes so there may a nop at the end.
1560 * Remove it.
1561 */
1562 if (dso__is_kcore(dso))
1563 delete_last_nop(sym);
1564
1565 fclose(file);
1566 err = 0;
1567 out_remove_tmp:
1568 close(stdout_fd[0]);
1569
1570 if (dso__needs_decompress(dso))
1571 unlink(symfs_filename);
1572
1573 if (delete_extract)
1574 kcore_extract__delete(&kce);
1575 out:
1576 return err;
1577
1578 out_close_stdout:
1579 close(stdout_fd[1]);
1580 goto out_remove_tmp;
1581 }
1582
1583 static void insert_source_line(struct rb_root *root, struct source_line *src_line)
1584 {
1585 struct source_line *iter;
1586 struct rb_node **p = &root->rb_node;
1587 struct rb_node *parent = NULL;
1588 int i, ret;
1589
1590 while (*p != NULL) {
1591 parent = *p;
1592 iter = rb_entry(parent, struct source_line, node);
1593
1594 ret = strcmp(iter->path, src_line->path);
1595 if (ret == 0) {
1596 for (i = 0; i < src_line->nr_pcnt; i++)
1597 iter->samples[i].percent_sum += src_line->samples[i].percent;
1598 return;
1599 }
1600
1601 if (ret < 0)
1602 p = &(*p)->rb_left;
1603 else
1604 p = &(*p)->rb_right;
1605 }
1606
1607 for (i = 0; i < src_line->nr_pcnt; i++)
1608 src_line->samples[i].percent_sum = src_line->samples[i].percent;
1609
1610 rb_link_node(&src_line->node, parent, p);
1611 rb_insert_color(&src_line->node, root);
1612 }
1613
1614 static int cmp_source_line(struct source_line *a, struct source_line *b)
1615 {
1616 int i;
1617
1618 for (i = 0; i < a->nr_pcnt; i++) {
1619 if (a->samples[i].percent_sum == b->samples[i].percent_sum)
1620 continue;
1621 return a->samples[i].percent_sum > b->samples[i].percent_sum;
1622 }
1623
1624 return 0;
1625 }
1626
1627 static void __resort_source_line(struct rb_root *root, struct source_line *src_line)
1628 {
1629 struct source_line *iter;
1630 struct rb_node **p = &root->rb_node;
1631 struct rb_node *parent = NULL;
1632
1633 while (*p != NULL) {
1634 parent = *p;
1635 iter = rb_entry(parent, struct source_line, node);
1636
1637 if (cmp_source_line(src_line, iter))
1638 p = &(*p)->rb_left;
1639 else
1640 p = &(*p)->rb_right;
1641 }
1642
1643 rb_link_node(&src_line->node, parent, p);
1644 rb_insert_color(&src_line->node, root);
1645 }
1646
1647 static void resort_source_line(struct rb_root *dest_root, struct rb_root *src_root)
1648 {
1649 struct source_line *src_line;
1650 struct rb_node *node;
1651
1652 node = rb_first(src_root);
1653 while (node) {
1654 struct rb_node *next;
1655
1656 src_line = rb_entry(node, struct source_line, node);
1657 next = rb_next(node);
1658 rb_erase(node, src_root);
1659
1660 __resort_source_line(dest_root, src_line);
1661 node = next;
1662 }
1663 }
1664
1665 static void symbol__free_source_line(struct symbol *sym, int len)
1666 {
1667 struct annotation *notes = symbol__annotation(sym);
1668 struct source_line *src_line = notes->src->lines;
1669 size_t sizeof_src_line;
1670 int i;
1671
1672 sizeof_src_line = sizeof(*src_line) +
1673 (sizeof(src_line->samples) * (src_line->nr_pcnt - 1));
1674
1675 for (i = 0; i < len; i++) {
1676 free_srcline(src_line->path);
1677 src_line = (void *)src_line + sizeof_src_line;
1678 }
1679
1680 zfree(&notes->src->lines);
1681 }
1682
1683 /* Get the filename:line for the colored entries */
1684 static int symbol__get_source_line(struct symbol *sym, struct map *map,
1685 struct perf_evsel *evsel,
1686 struct rb_root *root, int len)
1687 {
1688 u64 start;
1689 int i, k;
1690 int evidx = evsel->idx;
1691 struct source_line *src_line;
1692 struct annotation *notes = symbol__annotation(sym);
1693 struct sym_hist *h = annotation__histogram(notes, evidx);
1694 struct rb_root tmp_root = RB_ROOT;
1695 int nr_pcnt = 1;
1696 u64 nr_samples = h->nr_samples;
1697 size_t sizeof_src_line = sizeof(struct source_line);
1698
1699 if (perf_evsel__is_group_event(evsel)) {
1700 for (i = 1; i < evsel->nr_members; i++) {
1701 h = annotation__histogram(notes, evidx + i);
1702 nr_samples += h->nr_samples;
1703 }
1704 nr_pcnt = evsel->nr_members;
1705 sizeof_src_line += (nr_pcnt - 1) * sizeof(src_line->samples);
1706 }
1707
1708 if (!nr_samples)
1709 return 0;
1710
1711 src_line = notes->src->lines = calloc(len, sizeof_src_line);
1712 if (!notes->src->lines)
1713 return -1;
1714
1715 start = map__rip_2objdump(map, sym->start);
1716
1717 for (i = 0; i < len; i++) {
1718 u64 offset;
1719 double percent_max = 0.0;
1720
1721 src_line->nr_pcnt = nr_pcnt;
1722
1723 for (k = 0; k < nr_pcnt; k++) {
1724 double percent = 0.0;
1725
1726 h = annotation__histogram(notes, evidx + k);
1727 nr_samples = h->addr[i].nr_samples;
1728 if (h->nr_samples)
1729 percent = 100.0 * nr_samples / h->nr_samples;
1730
1731 if (percent > percent_max)
1732 percent_max = percent;
1733 src_line->samples[k].percent = percent;
1734 src_line->samples[k].nr = nr_samples;
1735 }
1736
1737 if (percent_max <= 0.5)
1738 goto next;
1739
1740 offset = start + i;
1741 src_line->path = get_srcline(map->dso, offset, NULL,
1742 false, true);
1743 insert_source_line(&tmp_root, src_line);
1744
1745 next:
1746 src_line = (void *)src_line + sizeof_src_line;
1747 }
1748
1749 resort_source_line(root, &tmp_root);
1750 return 0;
1751 }
1752
1753 static void print_summary(struct rb_root *root, const char *filename)
1754 {
1755 struct source_line *src_line;
1756 struct rb_node *node;
1757
1758 printf("\nSorted summary for file %s\n", filename);
1759 printf("----------------------------------------------\n\n");
1760
1761 if (RB_EMPTY_ROOT(root)) {
1762 printf(" Nothing higher than %1.1f%%\n", MIN_GREEN);
1763 return;
1764 }
1765
1766 node = rb_first(root);
1767 while (node) {
1768 double percent, percent_max = 0.0;
1769 const char *color;
1770 char *path;
1771 int i;
1772
1773 src_line = rb_entry(node, struct source_line, node);
1774 for (i = 0; i < src_line->nr_pcnt; i++) {
1775 percent = src_line->samples[i].percent_sum;
1776 color = get_percent_color(percent);
1777 color_fprintf(stdout, color, " %7.2f", percent);
1778
1779 if (percent > percent_max)
1780 percent_max = percent;
1781 }
1782
1783 path = src_line->path;
1784 color = get_percent_color(percent_max);
1785 color_fprintf(stdout, color, " %s\n", path);
1786
1787 node = rb_next(node);
1788 }
1789 }
1790
1791 static void symbol__annotate_hits(struct symbol *sym, struct perf_evsel *evsel)
1792 {
1793 struct annotation *notes = symbol__annotation(sym);
1794 struct sym_hist *h = annotation__histogram(notes, evsel->idx);
1795 u64 len = symbol__size(sym), offset;
1796
1797 for (offset = 0; offset < len; ++offset)
1798 if (h->addr[offset].nr_samples != 0)
1799 printf("%*" PRIx64 ": %" PRIu64 "\n", BITS_PER_LONG / 2,
1800 sym->start + offset, h->addr[offset].nr_samples);
1801 printf("%*s: %" PRIu64 "\n", BITS_PER_LONG / 2, "h->nr_samples", h->nr_samples);
1802 }
1803
1804 int symbol__annotate_printf(struct symbol *sym, struct map *map,
1805 struct perf_evsel *evsel, bool full_paths,
1806 int min_pcnt, int max_lines, int context)
1807 {
1808 struct dso *dso = map->dso;
1809 char *filename;
1810 const char *d_filename;
1811 const char *evsel_name = perf_evsel__name(evsel);
1812 struct annotation *notes = symbol__annotation(sym);
1813 struct sym_hist *h = annotation__histogram(notes, evsel->idx);
1814 struct disasm_line *pos, *queue = NULL;
1815 u64 start = map__rip_2objdump(map, sym->start);
1816 int printed = 2, queue_len = 0;
1817 int more = 0;
1818 u64 len;
1819 int width = symbol_conf.show_total_period ? 12 : 8;
1820 int graph_dotted_len;
1821
1822 filename = strdup(dso->long_name);
1823 if (!filename)
1824 return -ENOMEM;
1825
1826 if (full_paths)
1827 d_filename = filename;
1828 else
1829 d_filename = basename(filename);
1830
1831 len = symbol__size(sym);
1832
1833 if (perf_evsel__is_group_event(evsel))
1834 width *= evsel->nr_members;
1835
1836 graph_dotted_len = printf(" %-*.*s| Source code & Disassembly of %s for %s (%" PRIu64 " samples)\n",
1837 width, width, symbol_conf.show_total_period ? "Period" :
1838 symbol_conf.show_nr_samples ? "Samples" : "Percent",
1839 d_filename, evsel_name, h->nr_samples);
1840
1841 printf("%-*.*s----\n",
1842 graph_dotted_len, graph_dotted_len, graph_dotted_line);
1843
1844 if (verbose > 0)
1845 symbol__annotate_hits(sym, evsel);
1846
1847 list_for_each_entry(pos, &notes->src->source, node) {
1848 if (context && queue == NULL) {
1849 queue = pos;
1850 queue_len = 0;
1851 }
1852
1853 switch (disasm_line__print(pos, sym, start, evsel, len,
1854 min_pcnt, printed, max_lines,
1855 queue)) {
1856 case 0:
1857 ++printed;
1858 if (context) {
1859 printed += queue_len;
1860 queue = NULL;
1861 queue_len = 0;
1862 }
1863 break;
1864 case 1:
1865 /* filtered by max_lines */
1866 ++more;
1867 break;
1868 case -1:
1869 default:
1870 /*
1871 * Filtered by min_pcnt or non IP lines when
1872 * context != 0
1873 */
1874 if (!context)
1875 break;
1876 if (queue_len == context)
1877 queue = list_entry(queue->node.next, typeof(*queue), node);
1878 else
1879 ++queue_len;
1880 break;
1881 }
1882 }
1883
1884 free(filename);
1885
1886 return more;
1887 }
1888
1889 void symbol__annotate_zero_histogram(struct symbol *sym, int evidx)
1890 {
1891 struct annotation *notes = symbol__annotation(sym);
1892 struct sym_hist *h = annotation__histogram(notes, evidx);
1893
1894 memset(h, 0, notes->src->sizeof_sym_hist);
1895 }
1896
1897 void symbol__annotate_decay_histogram(struct symbol *sym, int evidx)
1898 {
1899 struct annotation *notes = symbol__annotation(sym);
1900 struct sym_hist *h = annotation__histogram(notes, evidx);
1901 int len = symbol__size(sym), offset;
1902
1903 h->nr_samples = 0;
1904 for (offset = 0; offset < len; ++offset) {
1905 h->addr[offset].nr_samples = h->addr[offset].nr_samples * 7 / 8;
1906 h->nr_samples += h->addr[offset].nr_samples;
1907 }
1908 }
1909
1910 void disasm__purge(struct list_head *head)
1911 {
1912 struct disasm_line *pos, *n;
1913
1914 list_for_each_entry_safe(pos, n, head, node) {
1915 list_del(&pos->node);
1916 disasm_line__free(pos);
1917 }
1918 }
1919
1920 static size_t disasm_line__fprintf(struct disasm_line *dl, FILE *fp)
1921 {
1922 size_t printed;
1923
1924 if (dl->offset == -1)
1925 return fprintf(fp, "%s\n", dl->line);
1926
1927 printed = fprintf(fp, "%#" PRIx64 " %s", dl->offset, dl->ins.name);
1928
1929 if (dl->ops.raw[0] != '\0') {
1930 printed += fprintf(fp, "%.*s %s\n", 6 - (int)printed, " ",
1931 dl->ops.raw);
1932 }
1933
1934 return printed + fprintf(fp, "\n");
1935 }
1936
1937 size_t disasm__fprintf(struct list_head *head, FILE *fp)
1938 {
1939 struct disasm_line *pos;
1940 size_t printed = 0;
1941
1942 list_for_each_entry(pos, head, node)
1943 printed += disasm_line__fprintf(pos, fp);
1944
1945 return printed;
1946 }
1947
1948 int symbol__tty_annotate(struct symbol *sym, struct map *map,
1949 struct perf_evsel *evsel, bool print_lines,
1950 bool full_paths, int min_pcnt, int max_lines)
1951 {
1952 struct dso *dso = map->dso;
1953 struct rb_root source_line = RB_ROOT;
1954 u64 len;
1955
1956 if (symbol__disassemble(sym, map, perf_evsel__env_arch(evsel),
1957 0, NULL, NULL) < 0)
1958 return -1;
1959
1960 len = symbol__size(sym);
1961
1962 if (print_lines) {
1963 srcline_full_filename = full_paths;
1964 symbol__get_source_line(sym, map, evsel, &source_line, len);
1965 print_summary(&source_line, dso->long_name);
1966 }
1967
1968 symbol__annotate_printf(sym, map, evsel, full_paths,
1969 min_pcnt, max_lines, 0);
1970 if (print_lines)
1971 symbol__free_source_line(sym, len);
1972
1973 disasm__purge(&symbol__annotation(sym)->src->source);
1974
1975 return 0;
1976 }
1977
1978 bool ui__has_annotation(void)
1979 {
1980 return use_browser == 1 && perf_hpp_list.sym;
1981 }
Ubuntu Jammy Linux kernel mirror