summaryrefslogtreecommitdiff
path: root/tools/perf/builtin-report.c
blob: da156a44cb150eece3d75f685402e6a73fc36a6e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
/*
 * builtin-report.c
 *
 * Builtin report command: Analyze the perf.data input file,
 * look up and read DSOs and symbol information and display
 * a histogram of results, along various sorting keys.
 */
#include "builtin.h"

#include "util/util.h"
#include "util/cache.h"

#include "util/annotate.h"
#include "util/color.h"
#include <linux/list.h>
#include <linux/rbtree.h>
#include "util/symbol.h"
#include "util/callchain.h"
#include "util/strlist.h"
#include "util/values.h"

#include "perf.h"
#include "util/debug.h"
#include "util/evlist.h"
#include "util/evsel.h"
#include "util/header.h"
#include "util/session.h"
#include "util/tool.h"

#include "util/parse-options.h"
#include "util/parse-events.h"

#include "util/thread.h"
#include "util/sort.h"
#include "util/hist.h"
#include "util/data.h"
#include "arch/common.h"

#include <dlfcn.h>
#include <linux/bitmap.h>

struct report {
	struct perf_tool	tool;
	struct perf_session	*session;
	bool			force, use_tui, use_gtk, use_stdio;
	bool			hide_unresolved;
	bool			dont_use_callchains;
	bool			show_full_info;
	bool			show_threads;
	bool			inverted_callchain;
	bool			mem_mode;
	bool			header;
	bool			header_only;
	int			max_stack;
	struct perf_read_values	show_threads_values;
	const char		*pretty_printing_style;
	const char		*cpu_list;
	const char		*symbol_filter_str;
	float			min_percent;
	DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
};

static int report__config(const char *var, const char *value, void *cb)
{
	if (!strcmp(var, "report.group")) {
		symbol_conf.event_group = perf_config_bool(var, value);
		return 0;
	}
	if (!strcmp(var, "report.percent-limit")) {
		struct report *rep = cb;
		rep->min_percent = strtof(value, NULL);
		return 0;
	}

	return perf_default_config(var, value, cb);
}

static int report__resolve_callchain(struct report *rep, struct symbol **parent,
				     struct perf_evsel *evsel, struct addr_location *al,
				     struct perf_sample *sample, struct machine *machine)
{
	if ((sort__has_parent || symbol_conf.use_callchain) && sample->callchain) {
		return machine__resolve_callchain(machine, evsel, al->thread, sample,
						  parent, al, rep->max_stack);
	}
	return 0;
}

static int hist_entry__append_callchain(struct hist_entry *he, struct perf_sample *sample)
{
	if (!symbol_conf.use_callchain)
		return 0;
	return callchain_append(he->callchain, &callchain_cursor, sample->period);
}

static int report__add_mem_hist_entry(struct perf_tool *tool, struct addr_location *al,
				      struct perf_sample *sample, struct perf_evsel *evsel,
				      struct machine *machine, union perf_event *event)
{
	struct report *rep = container_of(tool, struct report, tool);
	struct symbol *parent = NULL;
	u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
	struct hist_entry *he;
	struct mem_info *mi, *mx;
	uint64_t cost;
	int err = report__resolve_callchain(rep, &parent, evsel, al, sample, machine);

	if (err)
		return err;

	mi = machine__resolve_mem(machine, al->thread, sample, cpumode);
	if (!mi)
		return -ENOMEM;

	if (rep->hide_unresolved && !al->sym)
		return 0;

	cost = sample->weight;
	if (!cost)
		cost = 1;

	/*
	 * must pass period=weight in order to get the correct
	 * sorting from hists__collapse_resort() which is solely
	 * based on periods. We want sorting be done on nr_events * weight
	 * and this is indirectly achieved by passing period=weight here
	 * and the he_stat__add_period() function.
	 */
	he = __hists__add_entry(&evsel->hists, al, parent, NULL, mi,
				cost, cost, 0);
	if (!he)
		return -ENOMEM;

	err = hist_entry__inc_addr_samples(he, evsel->idx, al->addr);
	if (err)
		goto out;

	mx = he->mem_info;
	err = addr_map_symbol__inc_samples(&mx->daddr, evsel->idx);
	if (err)
		goto out;

	evsel->hists.stats.total_period += cost;
	hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE);
	err = hist_entry__append_callchain(he, sample);
out:
	return err;
}

static int report__add_branch_hist_entry(struct perf_tool *tool, struct addr_location *al,
					 struct perf_sample *sample, struct perf_evsel *evsel,
					 struct machine *machine)
{
	struct report *rep = container_of(tool, struct report, tool);
	struct symbol *parent = NULL;
	unsigned i;
	struct hist_entry *he;
	struct branch_info *bi, *bx;
	int err = report__resolve_callchain(rep, &parent, evsel, al, sample, machine);

	if (err)
		return err;

	bi = machine__resolve_bstack(machine, al->thread,
				     sample->branch_stack);
	if (!bi)
		return -ENOMEM;

	for (i = 0; i < sample->branch_stack->nr; i++) {
		if (rep->hide_unresolved && !(bi[i].from.sym && bi[i].to.sym))
			continue;

		err = -ENOMEM;

		/* overwrite the 'al' to branch-to info */
		al->map = bi[i].to.map;
		al->sym = bi[i].to.sym;
		al->addr = bi[i].to.addr;
		/*
		 * The report shows the percentage of total branches captured
		 * and not events sampled. Thus we use a pseudo period of 1.
		 */
		he = __hists__add_entry(&evsel->hists, al, parent, &bi[i], NULL,
					1, 1, 0);
		if (he) {
			bx = he->branch_info;
			err = addr_map_symbol__inc_samples(&bx->from, evsel->idx);
			if (err)
				goto out;

			err = addr_map_symbol__inc_samples(&bx->to, evsel->idx);
			if (err)
				goto out;

			evsel->hists.stats.total_period += 1;
			hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE);
		} else
			goto out;
	}
	err = 0;
out:
	free(bi);
	return err;
}

static int report__add_hist_entry(struct perf_tool *tool, struct perf_evsel *evsel,
				  struct addr_location *al, struct perf_sample *sample,
				  struct machine *machine)
{
	struct report *rep = container_of(tool, struct report, tool);
	struct symbol *parent = NULL;
	struct hist_entry *he;
	int err = report__resolve_callchain(rep, &parent, evsel, al, sample, machine);

	if (err)
		return err;

	he = __hists__add_entry(&evsel->hists, al, parent, NULL, NULL,
				sample->period, sample->weight,
				sample->transaction);
	if (he == NULL)
		return -ENOMEM;

	err = hist_entry__append_callchain(he, sample);
	if (err)
		goto out;

	err = hist_entry__inc_addr_samples(he, evsel->idx, al->addr);
	evsel->hists.stats.total_period += sample->period;
	hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE);
out:
	return err;
}


static int process_sample_event(struct perf_tool *tool,
				union perf_event *event,
				struct perf_sample *sample,
				struct perf_evsel *evsel,
				struct machine *machine)
{
	struct report *rep = container_of(tool, struct report, tool);
	struct addr_location al;
	int ret;

	if (perf_event__preprocess_sample(event, machine, &al, sample) < 0) {
		fprintf(stderr, "problem processing %d event, skipping it.\n",
			event->header.type);
		return -1;
	}

	if (al.filtered || (rep->hide_unresolved && al.sym == NULL))
		return 0;

	if (rep->cpu_list && !test_bit(sample->cpu, rep->cpu_bitmap))
		return 0;

	if (sort__mode == SORT_MODE__BRANCH) {
		ret = report__add_branch_hist_entry(tool, &al, sample, evsel, machine);
		if (ret < 0)
			pr_debug("problem adding lbr entry, skipping event\n");
	} else if (rep->mem_mode == 1) {
		ret = report__add_mem_hist_entry(tool, &al, sample, evsel, machine, event);
		if (ret < 0)
			pr_debug("problem adding mem entry, skipping event\n");
	} else {
		if (al.map != NULL)
			al.map->dso->hit = 1;

		ret = report__add_hist_entry(tool, evsel, &al, sample, machine);
		if (ret < 0)
			pr_debug("problem incrementing symbol period, skipping event\n");
	}
	return ret;
}

static int process_read_event(struct perf_tool *tool,
			      union perf_event *event,
			      struct perf_sample *sample __maybe_unused,
			      struct perf_evsel *evsel,
			      struct machine *machine __maybe_unused)
{
	struct report *rep = container_of(tool, struct report, tool);

	if (rep->show_threads) {
		const char *name = evsel ? perf_evsel__name(evsel) : "unknown";
		perf_read_values_add_value(&rep->show_threads_values,
					   event->read.pid, event->read.tid,
					   event->read.id,
					   name,
					   event->read.value);
	}

	dump_printf(": %d %d %s %" PRIu64 "\n", event->read.pid, event->read.tid,
		    evsel ? perf_evsel__name(evsel) : "FAIL",
		    event->read.value);

	return 0;
}

/* For pipe mode, sample_type is not currently set */
static int report__setup_sample_type(struct report *rep)
{
	struct perf_session *session = rep->session;
	u64 sample_type = perf_evlist__combined_sample_type(session->evlist);
	bool is_pipe = perf_data_file__is_pipe(session->file);

	if (!is_pipe && !(sample_type & PERF_SAMPLE_CALLCHAIN)) {
		if (sort__has_parent) {
			ui__error("Selected --sort parent, but no "
				    "callchain data. Did you call "
				    "'perf record' without -g?\n");
			return -EINVAL;
		}
		if (symbol_conf.use_callchain) {
			ui__error("Selected -g but no callchain data. Did "
				    "you call 'perf record' without -g?\n");
			return -1;
		}
	} else if (!rep->dont_use_callchains &&
		   callchain_param.mode != CHAIN_NONE &&
		   !symbol_conf.use_callchain) {
			symbol_conf.use_callchain = true;
			if (callchain_register_param(&callchain_param) < 0) {
				ui__error("Can't register callchain params.\n");
				return -EINVAL;
			}
	}

	if (sort__mode == SORT_MODE__BRANCH) {
		if (!is_pipe &&
		    !(sample_type & PERF_SAMPLE_BRANCH_STACK)) {
			ui__error("Selected -b but no branch data. "
				  "Did you call perf record without -b?\n");
			return -1;
		}
	}

	return 0;
}

static void sig_handler(int sig __maybe_unused)
{
	session_done = 1;
}

static size_t hists__fprintf_nr_sample_events(struct hists *hists, struct report *rep,
					      const char *evname, FILE *fp)
{
	size_t ret;
	char unit;
	unsigned long nr_samples = hists->stats.nr_events[PERF_RECORD_SAMPLE];
	u64 nr_events = hists->stats.total_period;
	struct perf_evsel *evsel = hists_to_evsel(hists);
	char buf[512];
	size_t size = sizeof(buf);

	if (perf_evsel__is_group_event(evsel)) {
		struct perf_evsel *pos;

		perf_evsel__group_desc(evsel, buf, size);
		evname = buf;

		for_each_group_member(pos, evsel) {
			nr_samples += pos->hists.stats.nr_events[PERF_RECORD_SAMPLE];
			nr_events += pos->hists.stats.total_period;
		}
	}

	nr_samples = convert_unit(nr_samples, &unit);
	ret = fprintf(fp, "# Samples: %lu%c", nr_samples, unit);
	if (evname != NULL)
		ret += fprintf(fp, " of event '%s'", evname);

	if (rep->mem_mode) {
		ret += fprintf(fp, "\n# Total weight : %" PRIu64, nr_events);
		ret += fprintf(fp, "\n# Sort order   : %s", sort_order);
	} else
		ret += fprintf(fp, "\n# Event count (approx.): %" PRIu64, nr_events);
	return ret + fprintf(fp, "\n#\n");
}

static int perf_evlist__tty_browse_hists(struct perf_evlist *evlist,
					 struct report *rep,
					 const char *help)
{
	struct perf_evsel *pos;

	list_for_each_entry(pos, &evlist->entries, node) {
		struct hists *hists = &pos->hists;
		const char *evname = perf_evsel__name(pos);

		if (symbol_conf.event_group &&
		    !perf_evsel__is_group_leader(pos))
			continue;

		hists__fprintf_nr_sample_events(hists, rep, evname, stdout);
		hists__fprintf(hists, true, 0, 0, rep->min_percent, stdout);
		fprintf(stdout, "\n\n");
	}

	if (sort_order == default_sort_order &&
	    parent_pattern == default_parent_pattern) {
		fprintf(stdout, "#\n# (%s)\n#\n", help);

		if (rep->show_threads) {
			bool style = !strcmp(rep->pretty_printing_style, "raw");
			perf_read_values_display(stdout, &rep->show_threads_values,
						 style);
			perf_read_values_destroy(&rep->show_threads_values);
		}
	}

	return 0;
}

static int __cmd_report(struct report *rep)
{
	int ret = -EINVAL;
	u64 nr_samples;
	struct perf_session *session = rep->session;
	struct perf_evsel *pos;
	struct map *kernel_map;
	struct kmap *kernel_kmap;
	const char *help = "For a higher level overview, try: perf report --sort comm,dso";
	struct ui_progress prog;
	struct perf_data_file *file = session->file;

	signal(SIGINT, sig_handler);

	if (rep->cpu_list) {
		ret = perf_session__cpu_bitmap(session, rep->cpu_list,
					       rep->cpu_bitmap);
		if (ret)
			return ret;
	}

	if (rep->show_threads)
		perf_read_values_init(&rep->show_threads_values);

	ret = report__setup_sample_type(rep);
	if (ret)
		return ret;

	ret = perf_session__process_events(session, &rep->tool);
	if (ret)
		return ret;

	kernel_map = session->machines.host.vmlinux_maps[MAP__FUNCTION];
	kernel_kmap = map__kmap(kernel_map);
	if (kernel_map == NULL ||
	    (kernel_map->dso->hit &&
	     (kernel_kmap->ref_reloc_sym == NULL ||
	      kernel_kmap->ref_reloc_sym->addr == 0))) {
		const char *desc =
		    "As no suitable kallsyms nor vmlinux was found, kernel samples\n"
		    "can't be resolved.";

		if (kernel_map) {
			const struct dso *kdso = kernel_map->dso;
			if (!RB_EMPTY_ROOT(&kdso->symbols[MAP__FUNCTION])) {
				desc = "If some relocation was applied (e.g. "
				       "kexec) symbols may be misresolved.";
			}
		}

		ui__warning(
"Kernel address maps (/proc/{kallsyms,modules}) were restricted.\n\n"
"Check /proc/sys/kernel/kptr_restrict before running 'perf record'.\n\n%s\n\n"
"Samples in kernel modules can't be resolved as well.\n\n",
		desc);
	}

	if (verbose > 3)
		perf_session__fprintf(session, stdout);

	if (verbose > 2)
		perf_session__fprintf_dsos(session, stdout);

	if (dump_trace) {
		perf_session__fprintf_nr_events(session, stdout);
		return 0;
	}

	nr_samples = 0;
	list_for_each_entry(pos, &session->evlist->entries, node)
		nr_samples += pos->hists.nr_entries;

	ui_progress__init(&prog, nr_samples, "Merging related events...");

	nr_samples = 0;
	list_for_each_entry(pos, &session->evlist->entries, node) {
		struct hists *hists = &pos->hists;

		if (pos->idx == 0)
			hists->symbol_filter_str = rep->symbol_filter_str;

		hists__collapse_resort(hists, &prog);
		nr_samples += hists->stats.nr_events[PERF_RECORD_SAMPLE];

		/* Non-group events are considered as leader */
		if (symbol_conf.event_group &&
		    !perf_evsel__is_group_leader(pos)) {
			struct hists *leader_hists = &pos->leader->hists;

			hists__match(leader_hists, hists);
			hists__link(leader_hists, hists);
		}
	}
	ui_progress__finish();

	if (session_done())
		return 0;

	if (nr_samples == 0) {
		ui__error("The %s file has no samples!\n", file->path);
		return 0;
	}

	list_for_each_entry(pos, &session->evlist->entries, node)
		hists__output_resort(&pos->hists);

	if (use_browser > 0) {
		if (use_browser == 1) {
			ret = perf_evlist__tui_browse_hists(session->evlist,
							help, NULL,
							rep->min_percent,
							&session->header.env);
			/*
			 * Usually "ret" is the last pressed key, and we only
			 * care if the key notifies us to switch data file.
			 */
			if (ret != K_SWITCH_INPUT_DATA)
				ret = 0;

		} else if (use_browser == 2) {
			int (*hist_browser)(struct perf_evlist *,
					    const char *,
					    struct hist_browser_timer *,
					    float min_pcnt);

			hist_browser = dlsym(perf_gtk_handle,
					     "perf_evlist__gtk_browse_hists");
			if (hist_browser == NULL) {
				ui__error("GTK browser not found!\n");
				return ret;
			}
			hist_browser(session->evlist, help, NULL,
				     rep->min_percent);
		}
	} else
		perf_evlist__tty_browse_hists(session->evlist, rep, help);

	return ret;
}

static int
parse_callchain_opt(const struct option *opt, const char *arg, int unset)
{
	struct report *rep = (struct report *)opt->value;
	char *tok, *tok2;
	char *endptr;

	/*
	 * --no-call-graph
	 */
	if (unset) {
		rep->dont_use_callchains = true;
		return 0;
	}

	symbol_conf.use_callchain = true;

	if (!arg)
		return 0;

	tok = strtok((char *)arg, ",");
	if (!tok)
		return -1;

	/* get the output mode */
	if (!strncmp(tok, "graph", strlen(arg)))
		callchain_param.mode = CHAIN_GRAPH_ABS;

	else if (!strncmp(tok, "flat", strlen(arg)))
		callchain_param.mode = CHAIN_FLAT;

	else if (!strncmp(tok, "fractal", strlen(arg)))
		callchain_param.mode = CHAIN_GRAPH_REL;

	else if (!strncmp(tok, "none", strlen(arg))) {
		callchain_param.mode = CHAIN_NONE;
		symbol_conf.use_callchain = false;

		return 0;
	}

	else
		return -1;

	/* get the min percentage */
	tok = strtok(NULL, ",");
	if (!tok)
		goto setup;

	callchain_param.min_percent = strtod(tok, &endptr);
	if (tok == endptr)
		return -1;

	/* get the print limit */
	tok2 = strtok(NULL, ",");
	if (!tok2)
		goto setup;

	if (tok2[0] != 'c') {
		callchain_param.print_limit = strtoul(tok2, &endptr, 0);
		tok2 = strtok(NULL, ",");
		if (!tok2)
			goto setup;
	}

	/* get the call chain order */
	if (!strncmp(tok2, "caller", strlen("caller")))
		callchain_param.order = ORDER_CALLER;
	else if (!strncmp(tok2, "callee", strlen("callee")))
		callchain_param.order = ORDER_CALLEE;
	else
		return -1;

	/* Get the sort key */
	tok2 = strtok(NULL, ",");
	if (!tok2)
		goto setup;
	if (!strncmp(tok2, "function", strlen("function")))
		callchain_param.key = CCKEY_FUNCTION;
	else if (!strncmp(tok2, "address", strlen("address")))
		callchain_param.key = CCKEY_ADDRESS;
	else
		return -1;
setup:
	if (callchain_register_param(&callchain_param) < 0) {
		fprintf(stderr, "Can't register callchain params\n");
		return -1;
	}
	return 0;
}

int
report_parse_ignore_callees_opt(const struct option *opt __maybe_unused,
				const char *arg, int unset __maybe_unused)
{
	if (arg) {
		int err = regcomp(&ignore_callees_regex, arg, REG_EXTENDED);
		if (err) {
			char buf[BUFSIZ];
			regerror(err, &ignore_callees_regex, buf, sizeof(buf));
			pr_err("Invalid --ignore-callees regex: %s\n%s", arg, buf);
			return -1;
		}
		have_ignore_callees = 1;
	}

	return 0;
}

static int
parse_branch_mode(const struct option *opt __maybe_unused,
		  const char *str __maybe_unused, int unset)
{
	int *branch_mode = opt->value;

	*branch_mode = !unset;
	return 0;
}

static int
parse_percent_limit(const struct option *opt, const char *str,
		    int unset __maybe_unused)
{
	struct report *rep = opt->value;

	rep->min_percent = strtof(str, NULL);
	return 0;
}

int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
{
	struct perf_session *session;
	struct stat st;
	bool has_br_stack = false;
	int branch_mode = -1;
	int ret = -1;
	char callchain_default_opt[] = "fractal,0.5,callee";
	const char * const report_usage[] = {
		"perf report [<options>]",
		NULL
	};
	struct report report = {
		.tool = {
			.sample		 = process_sample_event,
			.mmap		 = perf_event__process_mmap,
			.mmap2		 = perf_event__process_mmap2,
			.comm		 = perf_event__process_comm,
			.exit		 = perf_event__process_exit,
			.fork		 = perf_event__process_fork,
			.lost		 = perf_event__process_lost,
			.read		 = process_read_event,
			.attr		 = perf_event__process_attr,
			.tracing_data	 = perf_event__process_tracing_data,
			.build_id	 = perf_event__process_build_id,
			.ordered_samples = true,
			.ordering_requires_timestamps = true,
		},
		.max_stack		 = PERF_MAX_STACK_DEPTH,
		.pretty_printing_style	 = "normal",
	};
	const struct option options[] = {
	OPT_STRING('i', "input", &input_name, "file",
		    "input file name"),
	OPT_INCR('v', "verbose", &verbose,
		    "be more verbose (show symbol address, etc)"),
	OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
		    "dump raw trace in ASCII"),
	OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
		   "file", "vmlinux pathname"),
	OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
		   "file", "kallsyms pathname"),
	OPT_BOOLEAN('f', "force", &report.force, "don't complain, do it"),
	OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
		    "load module symbols - WARNING: use only with -k and LIVE kernel"),
	OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
		    "Show a column with the number of samples"),
	OPT_BOOLEAN('T', "threads", &report.show_threads,
		    "Show per-thread event counters"),
	OPT_STRING(0, "pretty", &report.pretty_printing_style, "key",
		   "pretty printing style key: normal raw"),
	OPT_BOOLEAN(0, "tui", &report.use_tui, "Use the TUI interface"),
	OPT_BOOLEAN(0, "gtk", &report.use_gtk, "Use the GTK2 interface"),
	OPT_BOOLEAN(0, "stdio", &report.use_stdio,
		    "Use the stdio interface"),
	OPT_BOOLEAN(0, "header", &report.header, "Show data header."),
	OPT_BOOLEAN(0, "header-only", &report.header_only,
		    "Show only data header."),
	OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
		   "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline,"
		   " dso_to, dso_from, symbol_to, symbol_from, mispredict,"
		   " weight, local_weight, mem, symbol_daddr, dso_daddr, tlb, "
		   "snoop, locked, abort, in_tx, transaction"),
	OPT_BOOLEAN(0, "showcpuutilization", &symbol_conf.show_cpu_utilization,
		    "Show sample percentage for different cpu modes"),
	OPT_STRING('p', "parent", &parent_pattern, "regex",
		   "regex filter to identify parent, see: '--sort parent'"),
	OPT_BOOLEAN('x', "exclude-other", &symbol_conf.exclude_other,
		    "Only display entries with parent-match"),
	OPT_CALLBACK_DEFAULT('g', "call-graph", &report, "output_type,min_percent[,print_limit],call_order",
		     "Display callchains using output_type (graph, flat, fractal, or none) , min percent threshold, optional print limit, callchain order, key (function or address). "
		     "Default: fractal,0.5,callee,function", &parse_callchain_opt, callchain_default_opt),
	OPT_INTEGER(0, "max-stack", &report.max_stack,
		    "Set the maximum stack depth when parsing the callchain, "
		    "anything beyond the specified depth will be ignored. "
		    "Default: " __stringify(PERF_MAX_STACK_DEPTH)),
	OPT_BOOLEAN('G', "inverted", &report.inverted_callchain,
		    "alias for inverted call graph"),
	OPT_CALLBACK(0, "ignore-callees", NULL, "regex",
		   "ignore callees of these functions in call graphs",
		   report_parse_ignore_callees_opt),
	OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
		   "only consider symbols in these dsos"),
	OPT_STRING('c', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
		   "only consider symbols in these comms"),
	OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
		   "only consider these symbols"),
	OPT_STRING(0, "symbol-filter", &report.symbol_filter_str, "filter",
		   "only show symbols that (partially) match with this filter"),
	OPT_STRING('w', "column-widths", &symbol_conf.col_width_list_str,
		   "width[,width...]",
		   "don't try to adjust column width, use these fixed values"),
	OPT_STRING('t', "field-separator", &symbol_conf.field_sep, "separator",
		   "separator for columns, no spaces will be added between "
		   "columns '.' is reserved."),
	OPT_BOOLEAN('U', "hide-unresolved", &report.hide_unresolved,
		    "Only display entries resolved to a symbol"),
	OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
		    "Look for files with symbols relative to this directory"),
	OPT_STRING('C', "cpu", &report.cpu_list, "cpu",
		   "list of cpus to profile"),
	OPT_BOOLEAN('I', "show-info", &report.show_full_info,
		    "Display extended information about perf.data file"),
	OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src,
		    "Interleave source code with assembly code (default)"),
	OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw,
		    "Display raw encoding of assembly instructions (default)"),
	OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
		   "Specify disassembler style (e.g. -M intel for intel syntax)"),
	OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
		    "Show a column with the sum of periods"),
	OPT_BOOLEAN(0, "group", &symbol_conf.event_group,
		    "Show event group information together"),
	OPT_CALLBACK_NOOPT('b', "branch-stack", &branch_mode, "",
		    "use branch records for histogram filling", parse_branch_mode),
	OPT_STRING(0, "objdump", &objdump_path, "path",
		   "objdump binary to use for disassembly and annotations"),
	OPT_BOOLEAN(0, "demangle", &symbol_conf.demangle,
		    "Disable symbol demangling"),
	OPT_BOOLEAN(0, "mem-mode", &report.mem_mode, "mem access profile"),
	OPT_CALLBACK(0, "percent-limit", &report, "percent",
		     "Don't show entries under that percent", parse_percent_limit),
	OPT_END()
	};
	struct perf_data_file file = {
		.mode  = PERF_DATA_MODE_READ,
	};

	perf_config(report__config, &report);

	argc = parse_options(argc, argv, options, report_usage, 0);

	if (report.use_stdio)
		use_browser = 0;
	else if (report.use_tui)
		use_browser = 1;
	else if (report.use_gtk)
		use_browser = 2;

	if (report.inverted_callchain)
		callchain_param.order = ORDER_CALLER;

	if (!input_name || !strlen(input_name)) {
		if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
			input_name = "-";
		else
			input_name = "perf.data";
	}

	file.path  = input_name;
	file.force = report.force;

repeat:
	session = perf_session__new(&file, false, &report.tool);
	if (session == NULL)
		return -ENOMEM;

	report.session = session;

	has_br_stack = perf_header__has_feat(&session->header,
					     HEADER_BRANCH_STACK);

	if (branch_mode == -1 && has_br_stack)
		sort__mode = SORT_MODE__BRANCH;

	/* sort__mode could be NORMAL if --no-branch-stack */
	if (sort__mode == SORT_MODE__BRANCH) {
		/*
		 * if no sort_order is provided, then specify
		 * branch-mode specific order
		 */
		if (sort_order == default_sort_order)
			sort_order = "comm,dso_from,symbol_from,"
				     "dso_to,symbol_to";

	}
	if (report.mem_mode) {
		if (sort__mode == SORT_MODE__BRANCH) {
			fprintf(stderr, "branch and mem mode incompatible\n");
			goto error;
		}
		sort__mode = SORT_MODE__MEMORY;

		/*
		 * if no sort_order is provided, then specify
		 * branch-mode specific order
		 */
		if (sort_order == default_sort_order)
			sort_order = "local_weight,mem,sym,dso,symbol_daddr,dso_daddr,snoop,tlb,locked";
	}

	if (setup_sorting() < 0) {
		parse_options_usage(report_usage, options, "s", 1);
		goto error;
	}

	if (parent_pattern != default_parent_pattern) {
		if (sort_dimension__add("parent") < 0)
			goto error;
	}

	/* Force tty output for header output. */
	if (report.header || report.header_only)
		use_browser = 0;

	if (strcmp(input_name, "-") != 0)
		setup_browser(true);
	else {
		use_browser = 0;
		perf_hpp__init();
	}

	if (report.header || report.header_only) {
		perf_session__fprintf_info(session, stdout,
					   report.show_full_info);
		if (report.header_only)
			return 0;
	} else if (use_browser == 0) {
		fputs("# To display the perf.data header info, please use --header/--header-only options.\n#\n",
		      stdout);
	}

	/*
	 * Only in the TUI browser we are doing integrated annotation,
	 * so don't allocate extra space that won't be used in the stdio
	 * implementation.
	 */
	if (use_browser == 1 && sort__has_sym) {
		symbol_conf.priv_size = sizeof(struct annotation);
		machines__set_symbol_filter(&session->machines,
					    symbol__annotate_init);
		/*
 		 * For searching by name on the "Browse map details".
 		 * providing it only in verbose mode not to bloat too
 		 * much struct symbol.
 		 */
		if (verbose) {
			/*
			 * XXX: Need to provide a less kludgy way to ask for
			 * more space per symbol, the u32 is for the index on
			 * the ui browser.
			 * See symbol__browser_index.
			 */
			symbol_conf.priv_size += sizeof(u32);
			symbol_conf.sort_by_name = true;
		}
	}

	if (symbol__init() < 0)
		goto error;

	if (argc) {
		/*
		 * Special case: if there's an argument left then assume that
		 * it's a symbol filter:
		 */
		if (argc > 1)
			usage_with_options(report_usage, options);

		report.symbol_filter_str = argv[0];
	}

	sort__setup_elide(stdout);

	ret = __cmd_report(&report);
	if (ret == K_SWITCH_INPUT_DATA) {
		perf_session__delete(session);
		goto repeat;
	} else
		ret = 0;

error:
	perf_session__delete(session);
	return ret;
}