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authorIngo Molnar <mingo@elte.hu>2009-06-06 09:19:13 -0400
committerIngo Molnar <mingo@elte.hu>2009-06-06 12:58:30 -0400
commit8035e4288078cb806e7dd6bafe4d3e54d44cab3f (patch)
tree7b54e827020e9a9dbc2823009cb2815fc3e35fc9 /Documentation/perf_counter/builtin-annotate.c
parent6e6b754ffdb6415723686c733f13275397e44422 (diff)
perf_counter tools: Prepare for 'perf annotate'
Prepare for the 'perf annotate' implementation by splitting off builtin-annotate.c from builtin-report.c. ( We keep this commit separate to ease the later librarization of the facilities that perf-report and perf-annotate shares. ) Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'Documentation/perf_counter/builtin-annotate.c')
-rw-r--r--Documentation/perf_counter/builtin-annotate.c1291
1 files changed, 1291 insertions, 0 deletions
diff --git a/Documentation/perf_counter/builtin-annotate.c b/Documentation/perf_counter/builtin-annotate.c
new file mode 100644
index 000000000000..d656484ec983
--- /dev/null
+++ b/Documentation/perf_counter/builtin-annotate.c
@@ -0,0 +1,1291 @@
1/*
2 * builtin-annotate.c
3 *
4 * Builtin annotate command: Analyze the perf.data input file,
5 * look up and read DSOs and symbol information and display
6 * a histogram of results, along various sorting keys.
7 */
8#include "builtin.h"
9
10#include "util/util.h"
11
12#include "util/color.h"
13#include "util/list.h"
14#include "util/cache.h"
15#include "util/rbtree.h"
16#include "util/symbol.h"
17#include "util/string.h"
18
19#include "perf.h"
20
21#include "util/parse-options.h"
22#include "util/parse-events.h"
23
24#define SHOW_KERNEL 1
25#define SHOW_USER 2
26#define SHOW_HV 4
27
28static char const *input_name = "perf.data";
29static char *vmlinux = NULL;
30
31static char default_sort_order[] = "comm,dso";
32static char *sort_order = default_sort_order;
33
34static int input;
35static int show_mask = SHOW_KERNEL | SHOW_USER | SHOW_HV;
36
37static int dump_trace = 0;
38#define dprintf(x...) do { if (dump_trace) printf(x); } while (0)
39
40static int verbose;
41static int full_paths;
42
43static unsigned long page_size;
44static unsigned long mmap_window = 32;
45
46struct ip_event {
47 struct perf_event_header header;
48 __u64 ip;
49 __u32 pid, tid;
50};
51
52struct mmap_event {
53 struct perf_event_header header;
54 __u32 pid, tid;
55 __u64 start;
56 __u64 len;
57 __u64 pgoff;
58 char filename[PATH_MAX];
59};
60
61struct comm_event {
62 struct perf_event_header header;
63 __u32 pid, tid;
64 char comm[16];
65};
66
67struct fork_event {
68 struct perf_event_header header;
69 __u32 pid, ppid;
70};
71
72struct period_event {
73 struct perf_event_header header;
74 __u64 time;
75 __u64 id;
76 __u64 sample_period;
77};
78
79typedef union event_union {
80 struct perf_event_header header;
81 struct ip_event ip;
82 struct mmap_event mmap;
83 struct comm_event comm;
84 struct fork_event fork;
85 struct period_event period;
86} event_t;
87
88static LIST_HEAD(dsos);
89static struct dso *kernel_dso;
90static struct dso *vdso;
91
92static void dsos__add(struct dso *dso)
93{
94 list_add_tail(&dso->node, &dsos);
95}
96
97static struct dso *dsos__find(const char *name)
98{
99 struct dso *pos;
100
101 list_for_each_entry(pos, &dsos, node)
102 if (strcmp(pos->name, name) == 0)
103 return pos;
104 return NULL;
105}
106
107static struct dso *dsos__findnew(const char *name)
108{
109 struct dso *dso = dsos__find(name);
110 int nr;
111
112 if (dso)
113 return dso;
114
115 dso = dso__new(name, 0);
116 if (!dso)
117 goto out_delete_dso;
118
119 nr = dso__load(dso, NULL, verbose);
120 if (nr < 0) {
121 if (verbose)
122 fprintf(stderr, "Failed to open: %s\n", name);
123 goto out_delete_dso;
124 }
125 if (!nr && verbose) {
126 fprintf(stderr,
127 "No symbols found in: %s, maybe install a debug package?\n",
128 name);
129 }
130
131 dsos__add(dso);
132
133 return dso;
134
135out_delete_dso:
136 dso__delete(dso);
137 return NULL;
138}
139
140static void dsos__fprintf(FILE *fp)
141{
142 struct dso *pos;
143
144 list_for_each_entry(pos, &dsos, node)
145 dso__fprintf(pos, fp);
146}
147
148static struct symbol *vdso__find_symbol(struct dso *dso, uint64_t ip)
149{
150 return dso__find_symbol(kernel_dso, ip);
151}
152
153static int load_kernel(void)
154{
155 int err;
156
157 kernel_dso = dso__new("[kernel]", 0);
158 if (!kernel_dso)
159 return -1;
160
161 err = dso__load_kernel(kernel_dso, vmlinux, NULL, verbose);
162 if (err) {
163 dso__delete(kernel_dso);
164 kernel_dso = NULL;
165 } else
166 dsos__add(kernel_dso);
167
168 vdso = dso__new("[vdso]", 0);
169 if (!vdso)
170 return -1;
171
172 vdso->find_symbol = vdso__find_symbol;
173
174 dsos__add(vdso);
175
176 return err;
177}
178
179static char __cwd[PATH_MAX];
180static char *cwd = __cwd;
181static int cwdlen;
182
183static int strcommon(const char *pathname)
184{
185 int n = 0;
186
187 while (pathname[n] == cwd[n] && n < cwdlen)
188 ++n;
189
190 return n;
191}
192
193struct map {
194 struct list_head node;
195 uint64_t start;
196 uint64_t end;
197 uint64_t pgoff;
198 uint64_t (*map_ip)(struct map *, uint64_t);
199 struct dso *dso;
200};
201
202static uint64_t map__map_ip(struct map *map, uint64_t ip)
203{
204 return ip - map->start + map->pgoff;
205}
206
207static uint64_t vdso__map_ip(struct map *map, uint64_t ip)
208{
209 return ip;
210}
211
212static struct map *map__new(struct mmap_event *event)
213{
214 struct map *self = malloc(sizeof(*self));
215
216 if (self != NULL) {
217 const char *filename = event->filename;
218 char newfilename[PATH_MAX];
219
220 if (cwd) {
221 int n = strcommon(filename);
222
223 if (n == cwdlen) {
224 snprintf(newfilename, sizeof(newfilename),
225 ".%s", filename + n);
226 filename = newfilename;
227 }
228 }
229
230 self->start = event->start;
231 self->end = event->start + event->len;
232 self->pgoff = event->pgoff;
233
234 self->dso = dsos__findnew(filename);
235 if (self->dso == NULL)
236 goto out_delete;
237
238 if (self->dso == vdso)
239 self->map_ip = vdso__map_ip;
240 else
241 self->map_ip = map__map_ip;
242 }
243 return self;
244out_delete:
245 free(self);
246 return NULL;
247}
248
249static struct map *map__clone(struct map *self)
250{
251 struct map *map = malloc(sizeof(*self));
252
253 if (!map)
254 return NULL;
255
256 memcpy(map, self, sizeof(*self));
257
258 return map;
259}
260
261static int map__overlap(struct map *l, struct map *r)
262{
263 if (l->start > r->start) {
264 struct map *t = l;
265 l = r;
266 r = t;
267 }
268
269 if (l->end > r->start)
270 return 1;
271
272 return 0;
273}
274
275static size_t map__fprintf(struct map *self, FILE *fp)
276{
277 return fprintf(fp, " %"PRIx64"-%"PRIx64" %"PRIx64" %s\n",
278 self->start, self->end, self->pgoff, self->dso->name);
279}
280
281
282struct thread {
283 struct rb_node rb_node;
284 struct list_head maps;
285 pid_t pid;
286 char *comm;
287};
288
289static struct thread *thread__new(pid_t pid)
290{
291 struct thread *self = malloc(sizeof(*self));
292
293 if (self != NULL) {
294 self->pid = pid;
295 self->comm = malloc(32);
296 if (self->comm)
297 snprintf(self->comm, 32, ":%d", self->pid);
298 INIT_LIST_HEAD(&self->maps);
299 }
300
301 return self;
302}
303
304static int thread__set_comm(struct thread *self, const char *comm)
305{
306 if (self->comm)
307 free(self->comm);
308 self->comm = strdup(comm);
309 return self->comm ? 0 : -ENOMEM;
310}
311
312static size_t thread__fprintf(struct thread *self, FILE *fp)
313{
314 struct map *pos;
315 size_t ret = fprintf(fp, "Thread %d %s\n", self->pid, self->comm);
316
317 list_for_each_entry(pos, &self->maps, node)
318 ret += map__fprintf(pos, fp);
319
320 return ret;
321}
322
323
324static struct rb_root threads;
325static struct thread *last_match;
326
327static struct thread *threads__findnew(pid_t pid)
328{
329 struct rb_node **p = &threads.rb_node;
330 struct rb_node *parent = NULL;
331 struct thread *th;
332
333 /*
334 * Font-end cache - PID lookups come in blocks,
335 * so most of the time we dont have to look up
336 * the full rbtree:
337 */
338 if (last_match && last_match->pid == pid)
339 return last_match;
340
341 while (*p != NULL) {
342 parent = *p;
343 th = rb_entry(parent, struct thread, rb_node);
344
345 if (th->pid == pid) {
346 last_match = th;
347 return th;
348 }
349
350 if (pid < th->pid)
351 p = &(*p)->rb_left;
352 else
353 p = &(*p)->rb_right;
354 }
355
356 th = thread__new(pid);
357 if (th != NULL) {
358 rb_link_node(&th->rb_node, parent, p);
359 rb_insert_color(&th->rb_node, &threads);
360 last_match = th;
361 }
362
363 return th;
364}
365
366static void thread__insert_map(struct thread *self, struct map *map)
367{
368 struct map *pos, *tmp;
369
370 list_for_each_entry_safe(pos, tmp, &self->maps, node) {
371 if (map__overlap(pos, map)) {
372 list_del_init(&pos->node);
373 /* XXX leaks dsos */
374 free(pos);
375 }
376 }
377
378 list_add_tail(&map->node, &self->maps);
379}
380
381static int thread__fork(struct thread *self, struct thread *parent)
382{
383 struct map *map;
384
385 if (self->comm)
386 free(self->comm);
387 self->comm = strdup(parent->comm);
388 if (!self->comm)
389 return -ENOMEM;
390
391 list_for_each_entry(map, &parent->maps, node) {
392 struct map *new = map__clone(map);
393 if (!new)
394 return -ENOMEM;
395 thread__insert_map(self, new);
396 }
397
398 return 0;
399}
400
401static struct map *thread__find_map(struct thread *self, uint64_t ip)
402{
403 struct map *pos;
404
405 if (self == NULL)
406 return NULL;
407
408 list_for_each_entry(pos, &self->maps, node)
409 if (ip >= pos->start && ip <= pos->end)
410 return pos;
411
412 return NULL;
413}
414
415static size_t threads__fprintf(FILE *fp)
416{
417 size_t ret = 0;
418 struct rb_node *nd;
419
420 for (nd = rb_first(&threads); nd; nd = rb_next(nd)) {
421 struct thread *pos = rb_entry(nd, struct thread, rb_node);
422
423 ret += thread__fprintf(pos, fp);
424 }
425
426 return ret;
427}
428
429/*
430 * histogram, sorted on item, collects counts
431 */
432
433static struct rb_root hist;
434
435struct hist_entry {
436 struct rb_node rb_node;
437
438 struct thread *thread;
439 struct map *map;
440 struct dso *dso;
441 struct symbol *sym;
442 uint64_t ip;
443 char level;
444
445 uint32_t count;
446};
447
448/*
449 * configurable sorting bits
450 */
451
452struct sort_entry {
453 struct list_head list;
454
455 char *header;
456
457 int64_t (*cmp)(struct hist_entry *, struct hist_entry *);
458 int64_t (*collapse)(struct hist_entry *, struct hist_entry *);
459 size_t (*print)(FILE *fp, struct hist_entry *);
460};
461
462/* --sort pid */
463
464static int64_t
465sort__thread_cmp(struct hist_entry *left, struct hist_entry *right)
466{
467 return right->thread->pid - left->thread->pid;
468}
469
470static size_t
471sort__thread_print(FILE *fp, struct hist_entry *self)
472{
473 return fprintf(fp, "%16s:%5d", self->thread->comm ?: "", self->thread->pid);
474}
475
476static struct sort_entry sort_thread = {
477 .header = " Command: Pid",
478 .cmp = sort__thread_cmp,
479 .print = sort__thread_print,
480};
481
482/* --sort comm */
483
484static int64_t
485sort__comm_cmp(struct hist_entry *left, struct hist_entry *right)
486{
487 return right->thread->pid - left->thread->pid;
488}
489
490static int64_t
491sort__comm_collapse(struct hist_entry *left, struct hist_entry *right)
492{
493 char *comm_l = left->thread->comm;
494 char *comm_r = right->thread->comm;
495
496 if (!comm_l || !comm_r) {
497 if (!comm_l && !comm_r)
498 return 0;
499 else if (!comm_l)
500 return -1;
501 else
502 return 1;
503 }
504
505 return strcmp(comm_l, comm_r);
506}
507
508static size_t
509sort__comm_print(FILE *fp, struct hist_entry *self)
510{
511 return fprintf(fp, "%16s", self->thread->comm);
512}
513
514static struct sort_entry sort_comm = {
515 .header = " Command",
516 .cmp = sort__comm_cmp,
517 .collapse = sort__comm_collapse,
518 .print = sort__comm_print,
519};
520
521/* --sort dso */
522
523static int64_t
524sort__dso_cmp(struct hist_entry *left, struct hist_entry *right)
525{
526 struct dso *dso_l = left->dso;
527 struct dso *dso_r = right->dso;
528
529 if (!dso_l || !dso_r) {
530 if (!dso_l && !dso_r)
531 return 0;
532 else if (!dso_l)
533 return -1;
534 else
535 return 1;
536 }
537
538 return strcmp(dso_l->name, dso_r->name);
539}
540
541static size_t
542sort__dso_print(FILE *fp, struct hist_entry *self)
543{
544 if (self->dso)
545 return fprintf(fp, "%-25s", self->dso->name);
546
547 return fprintf(fp, "%016llx ", (__u64)self->ip);
548}
549
550static struct sort_entry sort_dso = {
551 .header = "Shared Object ",
552 .cmp = sort__dso_cmp,
553 .print = sort__dso_print,
554};
555
556/* --sort symbol */
557
558static int64_t
559sort__sym_cmp(struct hist_entry *left, struct hist_entry *right)
560{
561 uint64_t ip_l, ip_r;
562
563 if (left->sym == right->sym)
564 return 0;
565
566 ip_l = left->sym ? left->sym->start : left->ip;
567 ip_r = right->sym ? right->sym->start : right->ip;
568
569 return (int64_t)(ip_r - ip_l);
570}
571
572static size_t
573sort__sym_print(FILE *fp, struct hist_entry *self)
574{
575 size_t ret = 0;
576
577 if (verbose)
578 ret += fprintf(fp, "%#018llx ", (__u64)self->ip);
579
580 if (self->sym) {
581 ret += fprintf(fp, "[%c] %s",
582 self->dso == kernel_dso ? 'k' : '.', self->sym->name);
583 } else {
584 ret += fprintf(fp, "%#016llx", (__u64)self->ip);
585 }
586
587 return ret;
588}
589
590static struct sort_entry sort_sym = {
591 .header = "Symbol",
592 .cmp = sort__sym_cmp,
593 .print = sort__sym_print,
594};
595
596static int sort__need_collapse = 0;
597
598struct sort_dimension {
599 char *name;
600 struct sort_entry *entry;
601 int taken;
602};
603
604static struct sort_dimension sort_dimensions[] = {
605 { .name = "pid", .entry = &sort_thread, },
606 { .name = "comm", .entry = &sort_comm, },
607 { .name = "dso", .entry = &sort_dso, },
608 { .name = "symbol", .entry = &sort_sym, },
609};
610
611static LIST_HEAD(hist_entry__sort_list);
612
613static int sort_dimension__add(char *tok)
614{
615 int i;
616
617 for (i = 0; i < ARRAY_SIZE(sort_dimensions); i++) {
618 struct sort_dimension *sd = &sort_dimensions[i];
619
620 if (sd->taken)
621 continue;
622
623 if (strncasecmp(tok, sd->name, strlen(tok)))
624 continue;
625
626 if (sd->entry->collapse)
627 sort__need_collapse = 1;
628
629 list_add_tail(&sd->entry->list, &hist_entry__sort_list);
630 sd->taken = 1;
631
632 return 0;
633 }
634
635 return -ESRCH;
636}
637
638static int64_t
639hist_entry__cmp(struct hist_entry *left, struct hist_entry *right)
640{
641 struct sort_entry *se;
642 int64_t cmp = 0;
643
644 list_for_each_entry(se, &hist_entry__sort_list, list) {
645 cmp = se->cmp(left, right);
646 if (cmp)
647 break;
648 }
649
650 return cmp;
651}
652
653static int64_t
654hist_entry__collapse(struct hist_entry *left, struct hist_entry *right)
655{
656 struct sort_entry *se;
657 int64_t cmp = 0;
658
659 list_for_each_entry(se, &hist_entry__sort_list, list) {
660 int64_t (*f)(struct hist_entry *, struct hist_entry *);
661
662 f = se->collapse ?: se->cmp;
663
664 cmp = f(left, right);
665 if (cmp)
666 break;
667 }
668
669 return cmp;
670}
671
672static size_t
673hist_entry__fprintf(FILE *fp, struct hist_entry *self, uint64_t total_samples)
674{
675 struct sort_entry *se;
676 size_t ret;
677
678 if (total_samples) {
679 double percent = self->count * 100.0 / total_samples;
680 char *color = PERF_COLOR_NORMAL;
681
682 /*
683 * We color high-overhead entries in red, low-overhead
684 * entries in green - and keep the middle ground normal:
685 */
686 if (percent >= 5.0)
687 color = PERF_COLOR_RED;
688 if (percent < 0.5)
689 color = PERF_COLOR_GREEN;
690
691 ret = color_fprintf(fp, color, " %6.2f%%",
692 (self->count * 100.0) / total_samples);
693 } else
694 ret = fprintf(fp, "%12d ", self->count);
695
696 list_for_each_entry(se, &hist_entry__sort_list, list) {
697 fprintf(fp, " ");
698 ret += se->print(fp, self);
699 }
700
701 ret += fprintf(fp, "\n");
702
703 return ret;
704}
705
706/*
707 * collect histogram counts
708 */
709
710static int
711hist_entry__add(struct thread *thread, struct map *map, struct dso *dso,
712 struct symbol *sym, uint64_t ip, char level)
713{
714 struct rb_node **p = &hist.rb_node;
715 struct rb_node *parent = NULL;
716 struct hist_entry *he;
717 struct hist_entry entry = {
718 .thread = thread,
719 .map = map,
720 .dso = dso,
721 .sym = sym,
722 .ip = ip,
723 .level = level,
724 .count = 1,
725 };
726 int cmp;
727
728 while (*p != NULL) {
729 parent = *p;
730 he = rb_entry(parent, struct hist_entry, rb_node);
731
732 cmp = hist_entry__cmp(&entry, he);
733
734 if (!cmp) {
735 he->count++;
736 return 0;
737 }
738
739 if (cmp < 0)
740 p = &(*p)->rb_left;
741 else
742 p = &(*p)->rb_right;
743 }
744
745 he = malloc(sizeof(*he));
746 if (!he)
747 return -ENOMEM;
748 *he = entry;
749 rb_link_node(&he->rb_node, parent, p);
750 rb_insert_color(&he->rb_node, &hist);
751
752 return 0;
753}
754
755static void hist_entry__free(struct hist_entry *he)
756{
757 free(he);
758}
759
760/*
761 * collapse the histogram
762 */
763
764static struct rb_root collapse_hists;
765
766static void collapse__insert_entry(struct hist_entry *he)
767{
768 struct rb_node **p = &collapse_hists.rb_node;
769 struct rb_node *parent = NULL;
770 struct hist_entry *iter;
771 int64_t cmp;
772
773 while (*p != NULL) {
774 parent = *p;
775 iter = rb_entry(parent, struct hist_entry, rb_node);
776
777 cmp = hist_entry__collapse(iter, he);
778
779 if (!cmp) {
780 iter->count += he->count;
781 hist_entry__free(he);
782 return;
783 }
784
785 if (cmp < 0)
786 p = &(*p)->rb_left;
787 else
788 p = &(*p)->rb_right;
789 }
790
791 rb_link_node(&he->rb_node, parent, p);
792 rb_insert_color(&he->rb_node, &collapse_hists);
793}
794
795static void collapse__resort(void)
796{
797 struct rb_node *next;
798 struct hist_entry *n;
799
800 if (!sort__need_collapse)
801 return;
802
803 next = rb_first(&hist);
804 while (next) {
805 n = rb_entry(next, struct hist_entry, rb_node);
806 next = rb_next(&n->rb_node);
807
808 rb_erase(&n->rb_node, &hist);
809 collapse__insert_entry(n);
810 }
811}
812
813/*
814 * reverse the map, sort on count.
815 */
816
817static struct rb_root output_hists;
818
819static void output__insert_entry(struct hist_entry *he)
820{
821 struct rb_node **p = &output_hists.rb_node;
822 struct rb_node *parent = NULL;
823 struct hist_entry *iter;
824
825 while (*p != NULL) {
826 parent = *p;
827 iter = rb_entry(parent, struct hist_entry, rb_node);
828
829 if (he->count > iter->count)
830 p = &(*p)->rb_left;
831 else
832 p = &(*p)->rb_right;
833 }
834
835 rb_link_node(&he->rb_node, parent, p);
836 rb_insert_color(&he->rb_node, &output_hists);
837}
838
839static void output__resort(void)
840{
841 struct rb_node *next;
842 struct hist_entry *n;
843 struct rb_root *tree = &hist;
844
845 if (sort__need_collapse)
846 tree = &collapse_hists;
847
848 next = rb_first(tree);
849
850 while (next) {
851 n = rb_entry(next, struct hist_entry, rb_node);
852 next = rb_next(&n->rb_node);
853
854 rb_erase(&n->rb_node, tree);
855 output__insert_entry(n);
856 }
857}
858
859static size_t output__fprintf(FILE *fp, uint64_t total_samples)
860{
861 struct hist_entry *pos;
862 struct sort_entry *se;
863 struct rb_node *nd;
864 size_t ret = 0;
865
866 fprintf(fp, "\n");
867 fprintf(fp, "#\n");
868 fprintf(fp, "# (%Ld samples)\n", (__u64)total_samples);
869 fprintf(fp, "#\n");
870
871 fprintf(fp, "# Overhead");
872 list_for_each_entry(se, &hist_entry__sort_list, list)
873 fprintf(fp, " %s", se->header);
874 fprintf(fp, "\n");
875
876 fprintf(fp, "# ........");
877 list_for_each_entry(se, &hist_entry__sort_list, list) {
878 int i;
879
880 fprintf(fp, " ");
881 for (i = 0; i < strlen(se->header); i++)
882 fprintf(fp, ".");
883 }
884 fprintf(fp, "\n");
885
886 fprintf(fp, "#\n");
887
888 for (nd = rb_first(&output_hists); nd; nd = rb_next(nd)) {
889 pos = rb_entry(nd, struct hist_entry, rb_node);
890 ret += hist_entry__fprintf(fp, pos, total_samples);
891 }
892
893 if (!strcmp(sort_order, default_sort_order)) {
894 fprintf(fp, "#\n");
895 fprintf(fp, "# (For more details, try: perf annotate --sort comm,dso,symbol)\n");
896 fprintf(fp, "#\n");
897 }
898 fprintf(fp, "\n");
899
900 return ret;
901}
902
903static void register_idle_thread(void)
904{
905 struct thread *thread = threads__findnew(0);
906
907 if (thread == NULL ||
908 thread__set_comm(thread, "[idle]")) {
909 fprintf(stderr, "problem inserting idle task.\n");
910 exit(-1);
911 }
912}
913
914static unsigned long total = 0,
915 total_mmap = 0,
916 total_comm = 0,
917 total_fork = 0,
918 total_unknown = 0;
919
920static int
921process_overflow_event(event_t *event, unsigned long offset, unsigned long head)
922{
923 char level;
924 int show = 0;
925 struct dso *dso = NULL;
926 struct thread *thread = threads__findnew(event->ip.pid);
927 uint64_t ip = event->ip.ip;
928 struct map *map = NULL;
929
930 dprintf("%p [%p]: PERF_EVENT (IP, %d): %d: %p\n",
931 (void *)(offset + head),
932 (void *)(long)(event->header.size),
933 event->header.misc,
934 event->ip.pid,
935 (void *)(long)ip);
936
937 dprintf(" ... thread: %s:%d\n", thread->comm, thread->pid);
938
939 if (thread == NULL) {
940 fprintf(stderr, "problem processing %d event, skipping it.\n",
941 event->header.type);
942 return -1;
943 }
944
945 if (event->header.misc & PERF_EVENT_MISC_KERNEL) {
946 show = SHOW_KERNEL;
947 level = 'k';
948
949 dso = kernel_dso;
950
951 dprintf(" ...... dso: %s\n", dso->name);
952
953 } else if (event->header.misc & PERF_EVENT_MISC_USER) {
954
955 show = SHOW_USER;
956 level = '.';
957
958 map = thread__find_map(thread, ip);
959 if (map != NULL) {
960 ip = map->map_ip(map, ip);
961 dso = map->dso;
962 } else {
963 /*
964 * If this is outside of all known maps,
965 * and is a negative address, try to look it
966 * up in the kernel dso, as it might be a
967 * vsyscall (which executes in user-mode):
968 */
969 if ((long long)ip < 0)
970 dso = kernel_dso;
971 }
972 dprintf(" ...... dso: %s\n", dso ? dso->name : "<not found>");
973
974 } else {
975 show = SHOW_HV;
976 level = 'H';
977 dprintf(" ...... dso: [hypervisor]\n");
978 }
979
980 if (show & show_mask) {
981 struct symbol *sym = NULL;
982
983 if (dso)
984 sym = dso->find_symbol(dso, ip);
985
986 if (hist_entry__add(thread, map, dso, sym, ip, level)) {
987 fprintf(stderr,
988 "problem incrementing symbol count, skipping event\n");
989 return -1;
990 }
991 }
992 total++;
993
994 return 0;
995}
996
997static int
998process_mmap_event(event_t *event, unsigned long offset, unsigned long head)
999{
1000 struct thread *thread = threads__findnew(event->mmap.pid);
1001 struct map *map = map__new(&event->mmap);
1002
1003 dprintf("%p [%p]: PERF_EVENT_MMAP %d: [%p(%p) @ %p]: %s\n",
1004 (void *)(offset + head),
1005 (void *)(long)(event->header.size),
1006 event->mmap.pid,
1007 (void *)(long)event->mmap.start,
1008 (void *)(long)event->mmap.len,
1009 (void *)(long)event->mmap.pgoff,
1010 event->mmap.filename);
1011
1012 if (thread == NULL || map == NULL) {
1013 dprintf("problem processing PERF_EVENT_MMAP, skipping event.\n");
1014 return 0;
1015 }
1016
1017 thread__insert_map(thread, map);
1018 total_mmap++;
1019
1020 return 0;
1021}
1022
1023static int
1024process_comm_event(event_t *event, unsigned long offset, unsigned long head)
1025{
1026 struct thread *thread = threads__findnew(event->comm.pid);
1027
1028 dprintf("%p [%p]: PERF_EVENT_COMM: %s:%d\n",
1029 (void *)(offset + head),
1030 (void *)(long)(event->header.size),
1031 event->comm.comm, event->comm.pid);
1032
1033 if (thread == NULL ||
1034 thread__set_comm(thread, event->comm.comm)) {
1035 dprintf("problem processing PERF_EVENT_COMM, skipping event.\n");
1036 return -1;
1037 }
1038 total_comm++;
1039
1040 return 0;
1041}
1042
1043static int
1044process_fork_event(event_t *event, unsigned long offset, unsigned long head)
1045{
1046 struct thread *thread = threads__findnew(event->fork.pid);
1047 struct thread *parent = threads__findnew(event->fork.ppid);
1048
1049 dprintf("%p [%p]: PERF_EVENT_FORK: %d:%d\n",
1050 (void *)(offset + head),
1051 (void *)(long)(event->header.size),
1052 event->fork.pid, event->fork.ppid);
1053
1054 if (!thread || !parent || thread__fork(thread, parent)) {
1055 dprintf("problem processing PERF_EVENT_FORK, skipping event.\n");
1056 return -1;
1057 }
1058 total_fork++;
1059
1060 return 0;
1061}
1062
1063static int
1064process_period_event(event_t *event, unsigned long offset, unsigned long head)
1065{
1066 dprintf("%p [%p]: PERF_EVENT_PERIOD: time:%Ld, id:%Ld: period:%Ld\n",
1067 (void *)(offset + head),
1068 (void *)(long)(event->header.size),
1069 event->period.time,
1070 event->period.id,
1071 event->period.sample_period);
1072
1073 return 0;
1074}
1075
1076static int
1077process_event(event_t *event, unsigned long offset, unsigned long head)
1078{
1079 if (event->header.misc & PERF_EVENT_MISC_OVERFLOW)
1080 return process_overflow_event(event, offset, head);
1081
1082 switch (event->header.type) {
1083 case PERF_EVENT_MMAP:
1084 return process_mmap_event(event, offset, head);
1085
1086 case PERF_EVENT_COMM:
1087 return process_comm_event(event, offset, head);
1088
1089 case PERF_EVENT_FORK:
1090 return process_fork_event(event, offset, head);
1091
1092 case PERF_EVENT_PERIOD:
1093 return process_period_event(event, offset, head);
1094 /*
1095 * We dont process them right now but they are fine:
1096 */
1097
1098 case PERF_EVENT_THROTTLE:
1099 case PERF_EVENT_UNTHROTTLE:
1100 return 0;
1101
1102 default:
1103 return -1;
1104 }
1105
1106 return 0;
1107}
1108
1109static int __cmd_annotate(void)
1110{
1111 int ret, rc = EXIT_FAILURE;
1112 unsigned long offset = 0;
1113 unsigned long head = 0;
1114 struct stat stat;
1115 event_t *event;
1116 uint32_t size;
1117 char *buf;
1118
1119 register_idle_thread();
1120
1121 input = open(input_name, O_RDONLY);
1122 if (input < 0) {
1123 perror("failed to open file");
1124 exit(-1);
1125 }
1126
1127 ret = fstat(input, &stat);
1128 if (ret < 0) {
1129 perror("failed to stat file");
1130 exit(-1);
1131 }
1132
1133 if (!stat.st_size) {
1134 fprintf(stderr, "zero-sized file, nothing to do!\n");
1135 exit(0);
1136 }
1137
1138 if (load_kernel() < 0) {
1139 perror("failed to load kernel symbols");
1140 return EXIT_FAILURE;
1141 }
1142
1143 if (!full_paths) {
1144 if (getcwd(__cwd, sizeof(__cwd)) == NULL) {
1145 perror("failed to get the current directory");
1146 return EXIT_FAILURE;
1147 }
1148 cwdlen = strlen(cwd);
1149 } else {
1150 cwd = NULL;
1151 cwdlen = 0;
1152 }
1153remap:
1154 buf = (char *)mmap(NULL, page_size * mmap_window, PROT_READ,
1155 MAP_SHARED, input, offset);
1156 if (buf == MAP_FAILED) {
1157 perror("failed to mmap file");
1158 exit(-1);
1159 }
1160
1161more:
1162 event = (event_t *)(buf + head);
1163
1164 size = event->header.size;
1165 if (!size)
1166 size = 8;
1167
1168 if (head + event->header.size >= page_size * mmap_window) {
1169 unsigned long shift = page_size * (head / page_size);
1170 int ret;
1171
1172 ret = munmap(buf, page_size * mmap_window);
1173 assert(ret == 0);
1174
1175 offset += shift;
1176 head -= shift;
1177 goto remap;
1178 }
1179
1180 size = event->header.size;
1181
1182 dprintf("%p [%p]: event: %d\n",
1183 (void *)(offset + head),
1184 (void *)(long)event->header.size,
1185 event->header.type);
1186
1187 if (!size || process_event(event, offset, head) < 0) {
1188
1189 dprintf("%p [%p]: skipping unknown header type: %d\n",
1190 (void *)(offset + head),
1191 (void *)(long)(event->header.size),
1192 event->header.type);
1193
1194 total_unknown++;
1195
1196 /*
1197 * assume we lost track of the stream, check alignment, and
1198 * increment a single u64 in the hope to catch on again 'soon'.
1199 */
1200
1201 if (unlikely(head & 7))
1202 head &= ~7ULL;
1203
1204 size = 8;
1205 }
1206
1207 head += size;
1208
1209 if (offset + head < stat.st_size)
1210 goto more;
1211
1212 rc = EXIT_SUCCESS;
1213 close(input);
1214
1215 dprintf(" IP events: %10ld\n", total);
1216 dprintf(" mmap events: %10ld\n", total_mmap);
1217 dprintf(" comm events: %10ld\n", total_comm);
1218 dprintf(" fork events: %10ld\n", total_fork);
1219 dprintf(" unknown events: %10ld\n", total_unknown);
1220
1221 if (dump_trace)
1222 return 0;
1223
1224 if (verbose >= 3)
1225 threads__fprintf(stdout);
1226
1227 if (verbose >= 2)
1228 dsos__fprintf(stdout);
1229
1230 collapse__resort();
1231 output__resort();
1232 output__fprintf(stdout, total);
1233
1234 return rc;
1235}
1236
1237static const char * const annotate_usage[] = {
1238 "perf annotate [<options>] <command>",
1239 NULL
1240};
1241
1242static const struct option options[] = {
1243 OPT_STRING('i', "input", &input_name, "file",
1244 "input file name"),
1245 OPT_BOOLEAN('v', "verbose", &verbose,
1246 "be more verbose (show symbol address, etc)"),
1247 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1248 "dump raw trace in ASCII"),
1249 OPT_STRING('k', "vmlinux", &vmlinux, "file", "vmlinux pathname"),
1250 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1251 "sort by key(s): pid, comm, dso, symbol. Default: pid,symbol"),
1252 OPT_BOOLEAN('P', "full-paths", &full_paths,
1253 "Don't shorten the pathnames taking into account the cwd"),
1254 OPT_END()
1255};
1256
1257static void setup_sorting(void)
1258{
1259 char *tmp, *tok, *str = strdup(sort_order);
1260
1261 for (tok = strtok_r(str, ", ", &tmp);
1262 tok; tok = strtok_r(NULL, ", ", &tmp)) {
1263 if (sort_dimension__add(tok) < 0) {
1264 error("Unknown --sort key: `%s'", tok);
1265 usage_with_options(annotate_usage, options);
1266 }
1267 }
1268
1269 free(str);
1270}
1271
1272int cmd_annotate(int argc, const char **argv, const char *prefix)
1273{
1274 symbol__init();
1275
1276 page_size = getpagesize();
1277
1278 argc = parse_options(argc, argv, options, annotate_usage, 0);
1279
1280 setup_sorting();
1281
1282 /*
1283 * Any (unrecognized) arguments left?
1284 */
1285 if (argc)
1286 usage_with_options(annotate_usage, options);
1287
1288 setup_pager();
1289
1290 return __cmd_annotate();
1291}