xref: /openbmc/linux/tools/perf/builtin-report.c (revision ddc141e5)
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * builtin-report.c
4  *
5  * Builtin report command: Analyze the perf.data input file,
6  * look up and read DSOs and symbol information and display
7  * a histogram of results, along various sorting keys.
8  */
9 #include "builtin.h"
10 
11 #include "util/util.h"
12 #include "util/config.h"
13 
14 #include "util/annotate.h"
15 #include "util/color.h"
16 #include <linux/list.h>
17 #include <linux/rbtree.h>
18 #include <linux/err.h>
19 #include "util/symbol.h"
20 #include "util/callchain.h"
21 #include "util/values.h"
22 
23 #include "perf.h"
24 #include "util/debug.h"
25 #include "util/evlist.h"
26 #include "util/evsel.h"
27 #include "util/header.h"
28 #include "util/session.h"
29 #include "util/tool.h"
30 
31 #include <subcmd/parse-options.h>
32 #include <subcmd/exec-cmd.h>
33 #include "util/parse-events.h"
34 
35 #include "util/thread.h"
36 #include "util/sort.h"
37 #include "util/hist.h"
38 #include "util/data.h"
39 #include "arch/common.h"
40 #include "util/time-utils.h"
41 #include "util/auxtrace.h"
42 #include "util/units.h"
43 #include "util/branch.h"
44 
45 #include <dlfcn.h>
46 #include <errno.h>
47 #include <inttypes.h>
48 #include <regex.h>
49 #include <signal.h>
50 #include <linux/bitmap.h>
51 #include <linux/stringify.h>
52 #include <sys/types.h>
53 #include <sys/stat.h>
54 #include <unistd.h>
55 #include <linux/mman.h>
56 
57 struct report {
58 	struct perf_tool	tool;
59 	struct perf_session	*session;
60 	bool			use_tui, use_gtk, use_stdio;
61 	bool			show_full_info;
62 	bool			show_threads;
63 	bool			inverted_callchain;
64 	bool			mem_mode;
65 	bool			stats_mode;
66 	bool			tasks_mode;
67 	bool			mmaps_mode;
68 	bool			header;
69 	bool			header_only;
70 	bool			nonany_branch_mode;
71 	int			max_stack;
72 	struct perf_read_values	show_threads_values;
73 	const char		*pretty_printing_style;
74 	const char		*cpu_list;
75 	const char		*symbol_filter_str;
76 	const char		*time_str;
77 	struct perf_time_interval *ptime_range;
78 	int			range_size;
79 	int			range_num;
80 	float			min_percent;
81 	u64			nr_entries;
82 	u64			queue_size;
83 	int			socket_filter;
84 	DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
85 	struct branch_type_stat	brtype_stat;
86 };
87 
88 static int report__config(const char *var, const char *value, void *cb)
89 {
90 	struct report *rep = cb;
91 
92 	if (!strcmp(var, "report.group")) {
93 		symbol_conf.event_group = perf_config_bool(var, value);
94 		return 0;
95 	}
96 	if (!strcmp(var, "report.percent-limit")) {
97 		double pcnt = strtof(value, NULL);
98 
99 		rep->min_percent = pcnt;
100 		callchain_param.min_percent = pcnt;
101 		return 0;
102 	}
103 	if (!strcmp(var, "report.children")) {
104 		symbol_conf.cumulate_callchain = perf_config_bool(var, value);
105 		return 0;
106 	}
107 	if (!strcmp(var, "report.queue-size"))
108 		return perf_config_u64(&rep->queue_size, var, value);
109 
110 	if (!strcmp(var, "report.sort_order")) {
111 		default_sort_order = strdup(value);
112 		return 0;
113 	}
114 
115 	return 0;
116 }
117 
118 static int hist_iter__report_callback(struct hist_entry_iter *iter,
119 				      struct addr_location *al, bool single,
120 				      void *arg)
121 {
122 	int err = 0;
123 	struct report *rep = arg;
124 	struct hist_entry *he = iter->he;
125 	struct perf_evsel *evsel = iter->evsel;
126 	struct perf_sample *sample = iter->sample;
127 	struct mem_info *mi;
128 	struct branch_info *bi;
129 
130 	if (!ui__has_annotation())
131 		return 0;
132 
133 	hist__account_cycles(sample->branch_stack, al, sample,
134 			     rep->nonany_branch_mode);
135 
136 	if (sort__mode == SORT_MODE__BRANCH) {
137 		bi = he->branch_info;
138 		err = addr_map_symbol__inc_samples(&bi->from, sample, evsel->idx);
139 		if (err)
140 			goto out;
141 
142 		err = addr_map_symbol__inc_samples(&bi->to, sample, evsel->idx);
143 
144 	} else if (rep->mem_mode) {
145 		mi = he->mem_info;
146 		err = addr_map_symbol__inc_samples(&mi->daddr, sample, evsel->idx);
147 		if (err)
148 			goto out;
149 
150 		err = hist_entry__inc_addr_samples(he, sample, evsel->idx, al->addr);
151 
152 	} else if (symbol_conf.cumulate_callchain) {
153 		if (single)
154 			err = hist_entry__inc_addr_samples(he, sample, evsel->idx,
155 							   al->addr);
156 	} else {
157 		err = hist_entry__inc_addr_samples(he, sample, evsel->idx, al->addr);
158 	}
159 
160 out:
161 	return err;
162 }
163 
164 static int hist_iter__branch_callback(struct hist_entry_iter *iter,
165 				      struct addr_location *al __maybe_unused,
166 				      bool single __maybe_unused,
167 				      void *arg)
168 {
169 	struct hist_entry *he = iter->he;
170 	struct report *rep = arg;
171 	struct branch_info *bi;
172 	struct perf_sample *sample = iter->sample;
173 	struct perf_evsel *evsel = iter->evsel;
174 	int err;
175 
176 	if (!ui__has_annotation())
177 		return 0;
178 
179 	hist__account_cycles(sample->branch_stack, al, sample,
180 			     rep->nonany_branch_mode);
181 
182 	bi = he->branch_info;
183 	err = addr_map_symbol__inc_samples(&bi->from, sample, evsel->idx);
184 	if (err)
185 		goto out;
186 
187 	err = addr_map_symbol__inc_samples(&bi->to, sample, evsel->idx);
188 
189 	branch_type_count(&rep->brtype_stat, &bi->flags,
190 			  bi->from.addr, bi->to.addr);
191 
192 out:
193 	return err;
194 }
195 
196 static int process_sample_event(struct perf_tool *tool,
197 				union perf_event *event,
198 				struct perf_sample *sample,
199 				struct perf_evsel *evsel,
200 				struct machine *machine)
201 {
202 	struct report *rep = container_of(tool, struct report, tool);
203 	struct addr_location al;
204 	struct hist_entry_iter iter = {
205 		.evsel 			= evsel,
206 		.sample 		= sample,
207 		.hide_unresolved 	= symbol_conf.hide_unresolved,
208 		.add_entry_cb 		= hist_iter__report_callback,
209 	};
210 	int ret = 0;
211 
212 	if (perf_time__ranges_skip_sample(rep->ptime_range, rep->range_num,
213 					  sample->time)) {
214 		return 0;
215 	}
216 
217 	if (machine__resolve(machine, &al, sample) < 0) {
218 		pr_debug("problem processing %d event, skipping it.\n",
219 			 event->header.type);
220 		return -1;
221 	}
222 
223 	if (symbol_conf.hide_unresolved && al.sym == NULL)
224 		goto out_put;
225 
226 	if (rep->cpu_list && !test_bit(sample->cpu, rep->cpu_bitmap))
227 		goto out_put;
228 
229 	if (sort__mode == SORT_MODE__BRANCH) {
230 		/*
231 		 * A non-synthesized event might not have a branch stack if
232 		 * branch stacks have been synthesized (using itrace options).
233 		 */
234 		if (!sample->branch_stack)
235 			goto out_put;
236 
237 		iter.add_entry_cb = hist_iter__branch_callback;
238 		iter.ops = &hist_iter_branch;
239 	} else if (rep->mem_mode) {
240 		iter.ops = &hist_iter_mem;
241 	} else if (symbol_conf.cumulate_callchain) {
242 		iter.ops = &hist_iter_cumulative;
243 	} else {
244 		iter.ops = &hist_iter_normal;
245 	}
246 
247 	if (al.map != NULL)
248 		al.map->dso->hit = 1;
249 
250 	ret = hist_entry_iter__add(&iter, &al, rep->max_stack, rep);
251 	if (ret < 0)
252 		pr_debug("problem adding hist entry, skipping event\n");
253 out_put:
254 	addr_location__put(&al);
255 	return ret;
256 }
257 
258 static int process_read_event(struct perf_tool *tool,
259 			      union perf_event *event,
260 			      struct perf_sample *sample __maybe_unused,
261 			      struct perf_evsel *evsel,
262 			      struct machine *machine __maybe_unused)
263 {
264 	struct report *rep = container_of(tool, struct report, tool);
265 
266 	if (rep->show_threads) {
267 		const char *name = evsel ? perf_evsel__name(evsel) : "unknown";
268 		int err = perf_read_values_add_value(&rep->show_threads_values,
269 					   event->read.pid, event->read.tid,
270 					   evsel->idx,
271 					   name,
272 					   event->read.value);
273 
274 		if (err)
275 			return err;
276 	}
277 
278 	return 0;
279 }
280 
281 /* For pipe mode, sample_type is not currently set */
282 static int report__setup_sample_type(struct report *rep)
283 {
284 	struct perf_session *session = rep->session;
285 	u64 sample_type = perf_evlist__combined_sample_type(session->evlist);
286 	bool is_pipe = perf_data__is_pipe(session->data);
287 
288 	if (session->itrace_synth_opts->callchain ||
289 	    (!is_pipe &&
290 	     perf_header__has_feat(&session->header, HEADER_AUXTRACE) &&
291 	     !session->itrace_synth_opts->set))
292 		sample_type |= PERF_SAMPLE_CALLCHAIN;
293 
294 	if (session->itrace_synth_opts->last_branch)
295 		sample_type |= PERF_SAMPLE_BRANCH_STACK;
296 
297 	if (!is_pipe && !(sample_type & PERF_SAMPLE_CALLCHAIN)) {
298 		if (perf_hpp_list.parent) {
299 			ui__error("Selected --sort parent, but no "
300 				    "callchain data. Did you call "
301 				    "'perf record' without -g?\n");
302 			return -EINVAL;
303 		}
304 		if (symbol_conf.use_callchain &&
305 			!symbol_conf.show_branchflag_count) {
306 			ui__error("Selected -g or --branch-history.\n"
307 				  "But no callchain or branch data.\n"
308 				  "Did you call 'perf record' without -g or -b?\n");
309 			return -1;
310 		}
311 	} else if (!callchain_param.enabled &&
312 		   callchain_param.mode != CHAIN_NONE &&
313 		   !symbol_conf.use_callchain) {
314 			symbol_conf.use_callchain = true;
315 			if (callchain_register_param(&callchain_param) < 0) {
316 				ui__error("Can't register callchain params.\n");
317 				return -EINVAL;
318 			}
319 	}
320 
321 	if (symbol_conf.cumulate_callchain) {
322 		/* Silently ignore if callchain is missing */
323 		if (!(sample_type & PERF_SAMPLE_CALLCHAIN)) {
324 			symbol_conf.cumulate_callchain = false;
325 			perf_hpp__cancel_cumulate();
326 		}
327 	}
328 
329 	if (sort__mode == SORT_MODE__BRANCH) {
330 		if (!is_pipe &&
331 		    !(sample_type & PERF_SAMPLE_BRANCH_STACK)) {
332 			ui__error("Selected -b but no branch data. "
333 				  "Did you call perf record without -b?\n");
334 			return -1;
335 		}
336 	}
337 
338 	if (symbol_conf.use_callchain || symbol_conf.cumulate_callchain) {
339 		if ((sample_type & PERF_SAMPLE_REGS_USER) &&
340 		    (sample_type & PERF_SAMPLE_STACK_USER)) {
341 			callchain_param.record_mode = CALLCHAIN_DWARF;
342 			dwarf_callchain_users = true;
343 		} else if (sample_type & PERF_SAMPLE_BRANCH_STACK)
344 			callchain_param.record_mode = CALLCHAIN_LBR;
345 		else
346 			callchain_param.record_mode = CALLCHAIN_FP;
347 	}
348 
349 	/* ??? handle more cases than just ANY? */
350 	if (!(perf_evlist__combined_branch_type(session->evlist) &
351 				PERF_SAMPLE_BRANCH_ANY))
352 		rep->nonany_branch_mode = true;
353 
354 	return 0;
355 }
356 
357 static void sig_handler(int sig __maybe_unused)
358 {
359 	session_done = 1;
360 }
361 
362 static size_t hists__fprintf_nr_sample_events(struct hists *hists, struct report *rep,
363 					      const char *evname, FILE *fp)
364 {
365 	size_t ret;
366 	char unit;
367 	unsigned long nr_samples = hists->stats.nr_events[PERF_RECORD_SAMPLE];
368 	u64 nr_events = hists->stats.total_period;
369 	struct perf_evsel *evsel = hists_to_evsel(hists);
370 	char buf[512];
371 	size_t size = sizeof(buf);
372 	int socked_id = hists->socket_filter;
373 
374 	if (quiet)
375 		return 0;
376 
377 	if (symbol_conf.filter_relative) {
378 		nr_samples = hists->stats.nr_non_filtered_samples;
379 		nr_events = hists->stats.total_non_filtered_period;
380 	}
381 
382 	if (perf_evsel__is_group_event(evsel)) {
383 		struct perf_evsel *pos;
384 
385 		perf_evsel__group_desc(evsel, buf, size);
386 		evname = buf;
387 
388 		for_each_group_member(pos, evsel) {
389 			const struct hists *pos_hists = evsel__hists(pos);
390 
391 			if (symbol_conf.filter_relative) {
392 				nr_samples += pos_hists->stats.nr_non_filtered_samples;
393 				nr_events += pos_hists->stats.total_non_filtered_period;
394 			} else {
395 				nr_samples += pos_hists->stats.nr_events[PERF_RECORD_SAMPLE];
396 				nr_events += pos_hists->stats.total_period;
397 			}
398 		}
399 	}
400 
401 	nr_samples = convert_unit(nr_samples, &unit);
402 	ret = fprintf(fp, "# Samples: %lu%c", nr_samples, unit);
403 	if (evname != NULL)
404 		ret += fprintf(fp, " of event '%s'", evname);
405 
406 	if (rep->time_str)
407 		ret += fprintf(fp, " (time slices: %s)", rep->time_str);
408 
409 	if (symbol_conf.show_ref_callgraph &&
410 	    strstr(evname, "call-graph=no")) {
411 		ret += fprintf(fp, ", show reference callgraph");
412 	}
413 
414 	if (rep->mem_mode) {
415 		ret += fprintf(fp, "\n# Total weight : %" PRIu64, nr_events);
416 		ret += fprintf(fp, "\n# Sort order   : %s", sort_order ? : default_mem_sort_order);
417 	} else
418 		ret += fprintf(fp, "\n# Event count (approx.): %" PRIu64, nr_events);
419 
420 	if (socked_id > -1)
421 		ret += fprintf(fp, "\n# Processor Socket: %d", socked_id);
422 
423 	return ret + fprintf(fp, "\n#\n");
424 }
425 
426 static int perf_evlist__tty_browse_hists(struct perf_evlist *evlist,
427 					 struct report *rep,
428 					 const char *help)
429 {
430 	struct perf_evsel *pos;
431 
432 	if (!quiet) {
433 		fprintf(stdout, "#\n# Total Lost Samples: %" PRIu64 "\n#\n",
434 			evlist->stats.total_lost_samples);
435 	}
436 
437 	evlist__for_each_entry(evlist, pos) {
438 		struct hists *hists = evsel__hists(pos);
439 		const char *evname = perf_evsel__name(pos);
440 
441 		if (symbol_conf.event_group &&
442 		    !perf_evsel__is_group_leader(pos))
443 			continue;
444 
445 		hists__fprintf_nr_sample_events(hists, rep, evname, stdout);
446 		hists__fprintf(hists, !quiet, 0, 0, rep->min_percent, stdout,
447 			       symbol_conf.use_callchain ||
448 			       symbol_conf.show_branchflag_count);
449 		fprintf(stdout, "\n\n");
450 	}
451 
452 	if (!quiet)
453 		fprintf(stdout, "#\n# (%s)\n#\n", help);
454 
455 	if (rep->show_threads) {
456 		bool style = !strcmp(rep->pretty_printing_style, "raw");
457 		perf_read_values_display(stdout, &rep->show_threads_values,
458 					 style);
459 		perf_read_values_destroy(&rep->show_threads_values);
460 	}
461 
462 	if (sort__mode == SORT_MODE__BRANCH)
463 		branch_type_stat_display(stdout, &rep->brtype_stat);
464 
465 	return 0;
466 }
467 
468 static void report__warn_kptr_restrict(const struct report *rep)
469 {
470 	struct map *kernel_map = machine__kernel_map(&rep->session->machines.host);
471 	struct kmap *kernel_kmap = kernel_map ? map__kmap(kernel_map) : NULL;
472 
473 	if (perf_evlist__exclude_kernel(rep->session->evlist))
474 		return;
475 
476 	if (kernel_map == NULL ||
477 	    (kernel_map->dso->hit &&
478 	     (kernel_kmap->ref_reloc_sym == NULL ||
479 	      kernel_kmap->ref_reloc_sym->addr == 0))) {
480 		const char *desc =
481 		    "As no suitable kallsyms nor vmlinux was found, kernel samples\n"
482 		    "can't be resolved.";
483 
484 		if (kernel_map) {
485 			const struct dso *kdso = kernel_map->dso;
486 			if (!RB_EMPTY_ROOT(&kdso->symbols[MAP__FUNCTION])) {
487 				desc = "If some relocation was applied (e.g. "
488 				       "kexec) symbols may be misresolved.";
489 			}
490 		}
491 
492 		ui__warning(
493 "Kernel address maps (/proc/{kallsyms,modules}) were restricted.\n\n"
494 "Check /proc/sys/kernel/kptr_restrict before running 'perf record'.\n\n%s\n\n"
495 "Samples in kernel modules can't be resolved as well.\n\n",
496 		desc);
497 	}
498 }
499 
500 static int report__gtk_browse_hists(struct report *rep, const char *help)
501 {
502 	int (*hist_browser)(struct perf_evlist *evlist, const char *help,
503 			    struct hist_browser_timer *timer, float min_pcnt);
504 
505 	hist_browser = dlsym(perf_gtk_handle, "perf_evlist__gtk_browse_hists");
506 
507 	if (hist_browser == NULL) {
508 		ui__error("GTK browser not found!\n");
509 		return -1;
510 	}
511 
512 	return hist_browser(rep->session->evlist, help, NULL, rep->min_percent);
513 }
514 
515 static int report__browse_hists(struct report *rep)
516 {
517 	int ret;
518 	struct perf_session *session = rep->session;
519 	struct perf_evlist *evlist = session->evlist;
520 	const char *help = perf_tip(system_path(TIPDIR));
521 
522 	if (help == NULL) {
523 		/* fallback for people who don't install perf ;-) */
524 		help = perf_tip(DOCDIR);
525 		if (help == NULL)
526 			help = "Cannot load tips.txt file, please install perf!";
527 	}
528 
529 	switch (use_browser) {
530 	case 1:
531 		ret = perf_evlist__tui_browse_hists(evlist, help, NULL,
532 						    rep->min_percent,
533 						    &session->header.env,
534 						    true);
535 		/*
536 		 * Usually "ret" is the last pressed key, and we only
537 		 * care if the key notifies us to switch data file.
538 		 */
539 		if (ret != K_SWITCH_INPUT_DATA)
540 			ret = 0;
541 		break;
542 	case 2:
543 		ret = report__gtk_browse_hists(rep, help);
544 		break;
545 	default:
546 		ret = perf_evlist__tty_browse_hists(evlist, rep, help);
547 		break;
548 	}
549 
550 	return ret;
551 }
552 
553 static int report__collapse_hists(struct report *rep)
554 {
555 	struct ui_progress prog;
556 	struct perf_evsel *pos;
557 	int ret = 0;
558 
559 	ui_progress__init(&prog, rep->nr_entries, "Merging related events...");
560 
561 	evlist__for_each_entry(rep->session->evlist, pos) {
562 		struct hists *hists = evsel__hists(pos);
563 
564 		if (pos->idx == 0)
565 			hists->symbol_filter_str = rep->symbol_filter_str;
566 
567 		hists->socket_filter = rep->socket_filter;
568 
569 		ret = hists__collapse_resort(hists, &prog);
570 		if (ret < 0)
571 			break;
572 
573 		/* Non-group events are considered as leader */
574 		if (symbol_conf.event_group &&
575 		    !perf_evsel__is_group_leader(pos)) {
576 			struct hists *leader_hists = evsel__hists(pos->leader);
577 
578 			hists__match(leader_hists, hists);
579 			hists__link(leader_hists, hists);
580 		}
581 	}
582 
583 	ui_progress__finish();
584 	return ret;
585 }
586 
587 static void report__output_resort(struct report *rep)
588 {
589 	struct ui_progress prog;
590 	struct perf_evsel *pos;
591 
592 	ui_progress__init(&prog, rep->nr_entries, "Sorting events for output...");
593 
594 	evlist__for_each_entry(rep->session->evlist, pos)
595 		perf_evsel__output_resort(pos, &prog);
596 
597 	ui_progress__finish();
598 }
599 
600 static void stats_setup(struct report *rep)
601 {
602 	memset(&rep->tool, 0, sizeof(rep->tool));
603 	rep->tool.no_warn = true;
604 }
605 
606 static int stats_print(struct report *rep)
607 {
608 	struct perf_session *session = rep->session;
609 
610 	perf_session__fprintf_nr_events(session, stdout);
611 	return 0;
612 }
613 
614 static void tasks_setup(struct report *rep)
615 {
616 	memset(&rep->tool, 0, sizeof(rep->tool));
617 	if (rep->mmaps_mode) {
618 		rep->tool.mmap = perf_event__process_mmap;
619 		rep->tool.mmap2 = perf_event__process_mmap2;
620 	}
621 	rep->tool.comm = perf_event__process_comm;
622 	rep->tool.exit = perf_event__process_exit;
623 	rep->tool.fork = perf_event__process_fork;
624 	rep->tool.no_warn = true;
625 }
626 
627 struct task {
628 	struct thread		*thread;
629 	struct list_head	 list;
630 	struct list_head	 children;
631 };
632 
633 static struct task *tasks_list(struct task *task, struct machine *machine)
634 {
635 	struct thread *parent_thread, *thread = task->thread;
636 	struct task   *parent_task;
637 
638 	/* Already listed. */
639 	if (!list_empty(&task->list))
640 		return NULL;
641 
642 	/* Last one in the chain. */
643 	if (thread->ppid == -1)
644 		return task;
645 
646 	parent_thread = machine__find_thread(machine, -1, thread->ppid);
647 	if (!parent_thread)
648 		return ERR_PTR(-ENOENT);
649 
650 	parent_task = thread__priv(parent_thread);
651 	list_add_tail(&task->list, &parent_task->children);
652 	return tasks_list(parent_task, machine);
653 }
654 
655 static size_t maps__fprintf_task(struct maps *maps, int indent, FILE *fp)
656 {
657 	size_t printed = 0;
658 	struct rb_node *nd;
659 
660 	for (nd = rb_first(&maps->entries); nd; nd = rb_next(nd)) {
661 		struct map *map = rb_entry(nd, struct map, rb_node);
662 
663 		printed += fprintf(fp, "%*s  %" PRIx64 "-%" PRIx64 " %c%c%c%c %08" PRIx64 " %" PRIu64 " %s\n",
664 				   indent, "", map->start, map->end,
665 				   map->prot & PROT_READ ? 'r' : '-',
666 				   map->prot & PROT_WRITE ? 'w' : '-',
667 				   map->prot & PROT_EXEC ? 'x' : '-',
668 				   map->flags & MAP_SHARED ? 's' : 'p',
669 				   map->pgoff,
670 				   map->ino, map->dso->name);
671 	}
672 
673 	return printed;
674 }
675 
676 static int map_groups__fprintf_task(struct map_groups *mg, int indent, FILE *fp)
677 {
678 	int printed = 0, i;
679 	for (i = 0; i < MAP__NR_TYPES; ++i)
680 		printed += maps__fprintf_task(&mg->maps[i], indent, fp);
681 	return printed;
682 }
683 
684 static void task__print_level(struct task *task, FILE *fp, int level)
685 {
686 	struct thread *thread = task->thread;
687 	struct task *child;
688 	int comm_indent = fprintf(fp, "  %8d %8d %8d |%*s",
689 				  thread->pid_, thread->tid, thread->ppid,
690 				  level, "");
691 
692 	fprintf(fp, "%s\n", thread__comm_str(thread));
693 
694 	map_groups__fprintf_task(thread->mg, comm_indent, fp);
695 
696 	if (!list_empty(&task->children)) {
697 		list_for_each_entry(child, &task->children, list)
698 			task__print_level(child, fp, level + 1);
699 	}
700 }
701 
702 static int tasks_print(struct report *rep, FILE *fp)
703 {
704 	struct perf_session *session = rep->session;
705 	struct machine      *machine = &session->machines.host;
706 	struct task *tasks, *task;
707 	unsigned int nr = 0, itask = 0, i;
708 	struct rb_node *nd;
709 	LIST_HEAD(list);
710 
711 	/*
712 	 * No locking needed while accessing machine->threads,
713 	 * because --tasks is single threaded command.
714 	 */
715 
716 	/* Count all the threads. */
717 	for (i = 0; i < THREADS__TABLE_SIZE; i++)
718 		nr += machine->threads[i].nr;
719 
720 	tasks = malloc(sizeof(*tasks) * nr);
721 	if (!tasks)
722 		return -ENOMEM;
723 
724 	for (i = 0; i < THREADS__TABLE_SIZE; i++) {
725 		struct threads *threads = &machine->threads[i];
726 
727 		for (nd = rb_first(&threads->entries); nd; nd = rb_next(nd)) {
728 			task = tasks + itask++;
729 
730 			task->thread = rb_entry(nd, struct thread, rb_node);
731 			INIT_LIST_HEAD(&task->children);
732 			INIT_LIST_HEAD(&task->list);
733 			thread__set_priv(task->thread, task);
734 		}
735 	}
736 
737 	/*
738 	 * Iterate every task down to the unprocessed parent
739 	 * and link all in task children list. Task with no
740 	 * parent is added into 'list'.
741 	 */
742 	for (itask = 0; itask < nr; itask++) {
743 		task = tasks + itask;
744 
745 		if (!list_empty(&task->list))
746 			continue;
747 
748 		task = tasks_list(task, machine);
749 		if (IS_ERR(task)) {
750 			pr_err("Error: failed to process tasks\n");
751 			free(tasks);
752 			return PTR_ERR(task);
753 		}
754 
755 		if (task)
756 			list_add_tail(&task->list, &list);
757 	}
758 
759 	fprintf(fp, "# %8s %8s %8s  %s\n", "pid", "tid", "ppid", "comm");
760 
761 	list_for_each_entry(task, &list, list)
762 		task__print_level(task, fp, 0);
763 
764 	free(tasks);
765 	return 0;
766 }
767 
768 static int __cmd_report(struct report *rep)
769 {
770 	int ret;
771 	struct perf_session *session = rep->session;
772 	struct perf_evsel *pos;
773 	struct perf_data *data = session->data;
774 
775 	signal(SIGINT, sig_handler);
776 
777 	if (rep->cpu_list) {
778 		ret = perf_session__cpu_bitmap(session, rep->cpu_list,
779 					       rep->cpu_bitmap);
780 		if (ret) {
781 			ui__error("failed to set cpu bitmap\n");
782 			return ret;
783 		}
784 		session->itrace_synth_opts->cpu_bitmap = rep->cpu_bitmap;
785 	}
786 
787 	if (rep->show_threads) {
788 		ret = perf_read_values_init(&rep->show_threads_values);
789 		if (ret)
790 			return ret;
791 	}
792 
793 	ret = report__setup_sample_type(rep);
794 	if (ret) {
795 		/* report__setup_sample_type() already showed error message */
796 		return ret;
797 	}
798 
799 	if (rep->stats_mode)
800 		stats_setup(rep);
801 
802 	if (rep->tasks_mode)
803 		tasks_setup(rep);
804 
805 	ret = perf_session__process_events(session);
806 	if (ret) {
807 		ui__error("failed to process sample\n");
808 		return ret;
809 	}
810 
811 	if (rep->stats_mode)
812 		return stats_print(rep);
813 
814 	if (rep->tasks_mode)
815 		return tasks_print(rep, stdout);
816 
817 	report__warn_kptr_restrict(rep);
818 
819 	evlist__for_each_entry(session->evlist, pos)
820 		rep->nr_entries += evsel__hists(pos)->nr_entries;
821 
822 	if (use_browser == 0) {
823 		if (verbose > 3)
824 			perf_session__fprintf(session, stdout);
825 
826 		if (verbose > 2)
827 			perf_session__fprintf_dsos(session, stdout);
828 
829 		if (dump_trace) {
830 			perf_session__fprintf_nr_events(session, stdout);
831 			perf_evlist__fprintf_nr_events(session->evlist, stdout);
832 			return 0;
833 		}
834 	}
835 
836 	ret = report__collapse_hists(rep);
837 	if (ret) {
838 		ui__error("failed to process hist entry\n");
839 		return ret;
840 	}
841 
842 	if (session_done())
843 		return 0;
844 
845 	/*
846 	 * recalculate number of entries after collapsing since it
847 	 * might be changed during the collapse phase.
848 	 */
849 	rep->nr_entries = 0;
850 	evlist__for_each_entry(session->evlist, pos)
851 		rep->nr_entries += evsel__hists(pos)->nr_entries;
852 
853 	if (rep->nr_entries == 0) {
854 		ui__error("The %s file has no samples!\n", data->file.path);
855 		return 0;
856 	}
857 
858 	report__output_resort(rep);
859 
860 	return report__browse_hists(rep);
861 }
862 
863 static int
864 report_parse_callchain_opt(const struct option *opt, const char *arg, int unset)
865 {
866 	struct callchain_param *callchain = opt->value;
867 
868 	callchain->enabled = !unset;
869 	/*
870 	 * --no-call-graph
871 	 */
872 	if (unset) {
873 		symbol_conf.use_callchain = false;
874 		callchain->mode = CHAIN_NONE;
875 		return 0;
876 	}
877 
878 	return parse_callchain_report_opt(arg);
879 }
880 
881 int
882 report_parse_ignore_callees_opt(const struct option *opt __maybe_unused,
883 				const char *arg, int unset __maybe_unused)
884 {
885 	if (arg) {
886 		int err = regcomp(&ignore_callees_regex, arg, REG_EXTENDED);
887 		if (err) {
888 			char buf[BUFSIZ];
889 			regerror(err, &ignore_callees_regex, buf, sizeof(buf));
890 			pr_err("Invalid --ignore-callees regex: %s\n%s", arg, buf);
891 			return -1;
892 		}
893 		have_ignore_callees = 1;
894 	}
895 
896 	return 0;
897 }
898 
899 static int
900 parse_branch_mode(const struct option *opt,
901 		  const char *str __maybe_unused, int unset)
902 {
903 	int *branch_mode = opt->value;
904 
905 	*branch_mode = !unset;
906 	return 0;
907 }
908 
909 static int
910 parse_percent_limit(const struct option *opt, const char *str,
911 		    int unset __maybe_unused)
912 {
913 	struct report *rep = opt->value;
914 	double pcnt = strtof(str, NULL);
915 
916 	rep->min_percent = pcnt;
917 	callchain_param.min_percent = pcnt;
918 	return 0;
919 }
920 
921 #define CALLCHAIN_DEFAULT_OPT  "graph,0.5,caller,function,percent"
922 
923 const char report_callchain_help[] = "Display call graph (stack chain/backtrace):\n\n"
924 				     CALLCHAIN_REPORT_HELP
925 				     "\n\t\t\t\tDefault: " CALLCHAIN_DEFAULT_OPT;
926 
927 int cmd_report(int argc, const char **argv)
928 {
929 	struct perf_session *session;
930 	struct itrace_synth_opts itrace_synth_opts = { .set = 0, };
931 	struct stat st;
932 	bool has_br_stack = false;
933 	int branch_mode = -1;
934 	bool branch_call_mode = false;
935 	char callchain_default_opt[] = CALLCHAIN_DEFAULT_OPT;
936 	const char * const report_usage[] = {
937 		"perf report [<options>]",
938 		NULL
939 	};
940 	struct report report = {
941 		.tool = {
942 			.sample		 = process_sample_event,
943 			.mmap		 = perf_event__process_mmap,
944 			.mmap2		 = perf_event__process_mmap2,
945 			.comm		 = perf_event__process_comm,
946 			.namespaces	 = perf_event__process_namespaces,
947 			.exit		 = perf_event__process_exit,
948 			.fork		 = perf_event__process_fork,
949 			.lost		 = perf_event__process_lost,
950 			.read		 = process_read_event,
951 			.attr		 = perf_event__process_attr,
952 			.tracing_data	 = perf_event__process_tracing_data,
953 			.build_id	 = perf_event__process_build_id,
954 			.id_index	 = perf_event__process_id_index,
955 			.auxtrace_info	 = perf_event__process_auxtrace_info,
956 			.auxtrace	 = perf_event__process_auxtrace,
957 			.feature	 = perf_event__process_feature,
958 			.ordered_events	 = true,
959 			.ordering_requires_timestamps = true,
960 		},
961 		.max_stack		 = PERF_MAX_STACK_DEPTH,
962 		.pretty_printing_style	 = "normal",
963 		.socket_filter		 = -1,
964 	};
965 	const struct option options[] = {
966 	OPT_STRING('i', "input", &input_name, "file",
967 		    "input file name"),
968 	OPT_INCR('v', "verbose", &verbose,
969 		    "be more verbose (show symbol address, etc)"),
970 	OPT_BOOLEAN('q', "quiet", &quiet, "Do not show any message"),
971 	OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
972 		    "dump raw trace in ASCII"),
973 	OPT_BOOLEAN(0, "stats", &report.stats_mode, "Display event stats"),
974 	OPT_BOOLEAN(0, "tasks", &report.tasks_mode, "Display recorded tasks"),
975 	OPT_BOOLEAN(0, "mmaps", &report.mmaps_mode, "Display recorded tasks memory maps"),
976 	OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
977 		   "file", "vmlinux pathname"),
978 	OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
979 		   "file", "kallsyms pathname"),
980 	OPT_BOOLEAN('f', "force", &symbol_conf.force, "don't complain, do it"),
981 	OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
982 		    "load module symbols - WARNING: use only with -k and LIVE kernel"),
983 	OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
984 		    "Show a column with the number of samples"),
985 	OPT_BOOLEAN('T', "threads", &report.show_threads,
986 		    "Show per-thread event counters"),
987 	OPT_STRING(0, "pretty", &report.pretty_printing_style, "key",
988 		   "pretty printing style key: normal raw"),
989 	OPT_BOOLEAN(0, "tui", &report.use_tui, "Use the TUI interface"),
990 	OPT_BOOLEAN(0, "gtk", &report.use_gtk, "Use the GTK2 interface"),
991 	OPT_BOOLEAN(0, "stdio", &report.use_stdio,
992 		    "Use the stdio interface"),
993 	OPT_BOOLEAN(0, "header", &report.header, "Show data header."),
994 	OPT_BOOLEAN(0, "header-only", &report.header_only,
995 		    "Show only data header."),
996 	OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
997 		   "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline, ..."
998 		   " Please refer the man page for the complete list."),
999 	OPT_STRING('F', "fields", &field_order, "key[,keys...]",
1000 		   "output field(s): overhead, period, sample plus all of sort keys"),
1001 	OPT_BOOLEAN(0, "show-cpu-utilization", &symbol_conf.show_cpu_utilization,
1002 		    "Show sample percentage for different cpu modes"),
1003 	OPT_BOOLEAN_FLAG(0, "showcpuutilization", &symbol_conf.show_cpu_utilization,
1004 		    "Show sample percentage for different cpu modes", PARSE_OPT_HIDDEN),
1005 	OPT_STRING('p', "parent", &parent_pattern, "regex",
1006 		   "regex filter to identify parent, see: '--sort parent'"),
1007 	OPT_BOOLEAN('x', "exclude-other", &symbol_conf.exclude_other,
1008 		    "Only display entries with parent-match"),
1009 	OPT_CALLBACK_DEFAULT('g', "call-graph", &callchain_param,
1010 			     "print_type,threshold[,print_limit],order,sort_key[,branch],value",
1011 			     report_callchain_help, &report_parse_callchain_opt,
1012 			     callchain_default_opt),
1013 	OPT_BOOLEAN(0, "children", &symbol_conf.cumulate_callchain,
1014 		    "Accumulate callchains of children and show total overhead as well"),
1015 	OPT_INTEGER(0, "max-stack", &report.max_stack,
1016 		    "Set the maximum stack depth when parsing the callchain, "
1017 		    "anything beyond the specified depth will be ignored. "
1018 		    "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
1019 	OPT_BOOLEAN('G', "inverted", &report.inverted_callchain,
1020 		    "alias for inverted call graph"),
1021 	OPT_CALLBACK(0, "ignore-callees", NULL, "regex",
1022 		   "ignore callees of these functions in call graphs",
1023 		   report_parse_ignore_callees_opt),
1024 	OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
1025 		   "only consider symbols in these dsos"),
1026 	OPT_STRING('c', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1027 		   "only consider symbols in these comms"),
1028 	OPT_STRING(0, "pid", &symbol_conf.pid_list_str, "pid[,pid...]",
1029 		   "only consider symbols in these pids"),
1030 	OPT_STRING(0, "tid", &symbol_conf.tid_list_str, "tid[,tid...]",
1031 		   "only consider symbols in these tids"),
1032 	OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1033 		   "only consider these symbols"),
1034 	OPT_STRING(0, "symbol-filter", &report.symbol_filter_str, "filter",
1035 		   "only show symbols that (partially) match with this filter"),
1036 	OPT_STRING('w', "column-widths", &symbol_conf.col_width_list_str,
1037 		   "width[,width...]",
1038 		   "don't try to adjust column width, use these fixed values"),
1039 	OPT_STRING_NOEMPTY('t', "field-separator", &symbol_conf.field_sep, "separator",
1040 		   "separator for columns, no spaces will be added between "
1041 		   "columns '.' is reserved."),
1042 	OPT_BOOLEAN('U', "hide-unresolved", &symbol_conf.hide_unresolved,
1043 		    "Only display entries resolved to a symbol"),
1044 	OPT_CALLBACK(0, "symfs", NULL, "directory",
1045 		     "Look for files with symbols relative to this directory",
1046 		     symbol__config_symfs),
1047 	OPT_STRING('C', "cpu", &report.cpu_list, "cpu",
1048 		   "list of cpus to profile"),
1049 	OPT_BOOLEAN('I', "show-info", &report.show_full_info,
1050 		    "Display extended information about perf.data file"),
1051 	OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src,
1052 		    "Interleave source code with assembly code (default)"),
1053 	OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw,
1054 		    "Display raw encoding of assembly instructions (default)"),
1055 	OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
1056 		   "Specify disassembler style (e.g. -M intel for intel syntax)"),
1057 	OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
1058 		    "Show a column with the sum of periods"),
1059 	OPT_BOOLEAN(0, "group", &symbol_conf.event_group,
1060 		    "Show event group information together"),
1061 	OPT_CALLBACK_NOOPT('b', "branch-stack", &branch_mode, "",
1062 		    "use branch records for per branch histogram filling",
1063 		    parse_branch_mode),
1064 	OPT_BOOLEAN(0, "branch-history", &branch_call_mode,
1065 		    "add last branch records to call history"),
1066 	OPT_STRING(0, "objdump", &objdump_path, "path",
1067 		   "objdump binary to use for disassembly and annotations"),
1068 	OPT_BOOLEAN(0, "demangle", &symbol_conf.demangle,
1069 		    "Disable symbol demangling"),
1070 	OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
1071 		    "Enable kernel symbol demangling"),
1072 	OPT_BOOLEAN(0, "mem-mode", &report.mem_mode, "mem access profile"),
1073 	OPT_CALLBACK(0, "percent-limit", &report, "percent",
1074 		     "Don't show entries under that percent", parse_percent_limit),
1075 	OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",
1076 		     "how to display percentage of filtered entries", parse_filter_percentage),
1077 	OPT_CALLBACK_OPTARG(0, "itrace", &itrace_synth_opts, NULL, "opts",
1078 			    "Instruction Tracing options",
1079 			    itrace_parse_synth_opts),
1080 	OPT_BOOLEAN(0, "full-source-path", &srcline_full_filename,
1081 			"Show full source file name path for source lines"),
1082 	OPT_BOOLEAN(0, "show-ref-call-graph", &symbol_conf.show_ref_callgraph,
1083 		    "Show callgraph from reference event"),
1084 	OPT_INTEGER(0, "socket-filter", &report.socket_filter,
1085 		    "only show processor socket that match with this filter"),
1086 	OPT_BOOLEAN(0, "raw-trace", &symbol_conf.raw_trace,
1087 		    "Show raw trace event output (do not use print fmt or plugins)"),
1088 	OPT_BOOLEAN(0, "hierarchy", &symbol_conf.report_hierarchy,
1089 		    "Show entries in a hierarchy"),
1090 	OPT_CALLBACK_DEFAULT(0, "stdio-color", NULL, "mode",
1091 			     "'always' (default), 'never' or 'auto' only applicable to --stdio mode",
1092 			     stdio__config_color, "always"),
1093 	OPT_STRING(0, "time", &report.time_str, "str",
1094 		   "Time span of interest (start,stop)"),
1095 	OPT_BOOLEAN(0, "inline", &symbol_conf.inline_name,
1096 		    "Show inline function"),
1097 	OPT_END()
1098 	};
1099 	struct perf_data data = {
1100 		.mode  = PERF_DATA_MODE_READ,
1101 	};
1102 	int ret = hists__init();
1103 
1104 	if (ret < 0)
1105 		return ret;
1106 
1107 	ret = perf_config(report__config, &report);
1108 	if (ret)
1109 		return ret;
1110 
1111 	argc = parse_options(argc, argv, options, report_usage, 0);
1112 	if (argc) {
1113 		/*
1114 		 * Special case: if there's an argument left then assume that
1115 		 * it's a symbol filter:
1116 		 */
1117 		if (argc > 1)
1118 			usage_with_options(report_usage, options);
1119 
1120 		report.symbol_filter_str = argv[0];
1121 	}
1122 
1123 	if (report.mmaps_mode)
1124 		report.tasks_mode = true;
1125 
1126 	if (quiet)
1127 		perf_quiet_option();
1128 
1129 	if (symbol_conf.vmlinux_name &&
1130 	    access(symbol_conf.vmlinux_name, R_OK)) {
1131 		pr_err("Invalid file: %s\n", symbol_conf.vmlinux_name);
1132 		return -EINVAL;
1133 	}
1134 	if (symbol_conf.kallsyms_name &&
1135 	    access(symbol_conf.kallsyms_name, R_OK)) {
1136 		pr_err("Invalid file: %s\n", symbol_conf.kallsyms_name);
1137 		return -EINVAL;
1138 	}
1139 
1140 	if (report.inverted_callchain)
1141 		callchain_param.order = ORDER_CALLER;
1142 	if (symbol_conf.cumulate_callchain && !callchain_param.order_set)
1143 		callchain_param.order = ORDER_CALLER;
1144 
1145 	if (itrace_synth_opts.callchain &&
1146 	    (int)itrace_synth_opts.callchain_sz > report.max_stack)
1147 		report.max_stack = itrace_synth_opts.callchain_sz;
1148 
1149 	if (!input_name || !strlen(input_name)) {
1150 		if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
1151 			input_name = "-";
1152 		else
1153 			input_name = "perf.data";
1154 	}
1155 
1156 	data.file.path = input_name;
1157 	data.force     = symbol_conf.force;
1158 
1159 repeat:
1160 	session = perf_session__new(&data, false, &report.tool);
1161 	if (session == NULL)
1162 		return -1;
1163 
1164 	if (report.queue_size) {
1165 		ordered_events__set_alloc_size(&session->ordered_events,
1166 					       report.queue_size);
1167 	}
1168 
1169 	session->itrace_synth_opts = &itrace_synth_opts;
1170 
1171 	report.session = session;
1172 
1173 	has_br_stack = perf_header__has_feat(&session->header,
1174 					     HEADER_BRANCH_STACK);
1175 
1176 	if (itrace_synth_opts.last_branch)
1177 		has_br_stack = true;
1178 
1179 	if (has_br_stack && branch_call_mode)
1180 		symbol_conf.show_branchflag_count = true;
1181 
1182 	memset(&report.brtype_stat, 0, sizeof(struct branch_type_stat));
1183 
1184 	/*
1185 	 * Branch mode is a tristate:
1186 	 * -1 means default, so decide based on the file having branch data.
1187 	 * 0/1 means the user chose a mode.
1188 	 */
1189 	if (((branch_mode == -1 && has_br_stack) || branch_mode == 1) &&
1190 	    !branch_call_mode) {
1191 		sort__mode = SORT_MODE__BRANCH;
1192 		symbol_conf.cumulate_callchain = false;
1193 	}
1194 	if (branch_call_mode) {
1195 		callchain_param.key = CCKEY_ADDRESS;
1196 		callchain_param.branch_callstack = 1;
1197 		symbol_conf.use_callchain = true;
1198 		callchain_register_param(&callchain_param);
1199 		if (sort_order == NULL)
1200 			sort_order = "srcline,symbol,dso";
1201 	}
1202 
1203 	if (report.mem_mode) {
1204 		if (sort__mode == SORT_MODE__BRANCH) {
1205 			pr_err("branch and mem mode incompatible\n");
1206 			goto error;
1207 		}
1208 		sort__mode = SORT_MODE__MEMORY;
1209 		symbol_conf.cumulate_callchain = false;
1210 	}
1211 
1212 	if (symbol_conf.report_hierarchy) {
1213 		/* disable incompatible options */
1214 		symbol_conf.cumulate_callchain = false;
1215 
1216 		if (field_order) {
1217 			pr_err("Error: --hierarchy and --fields options cannot be used together\n");
1218 			parse_options_usage(report_usage, options, "F", 1);
1219 			parse_options_usage(NULL, options, "hierarchy", 0);
1220 			goto error;
1221 		}
1222 
1223 		perf_hpp_list.need_collapse = true;
1224 	}
1225 
1226 	if (report.use_stdio)
1227 		use_browser = 0;
1228 	else if (report.use_tui)
1229 		use_browser = 1;
1230 	else if (report.use_gtk)
1231 		use_browser = 2;
1232 
1233 	/* Force tty output for header output and per-thread stat. */
1234 	if (report.header || report.header_only || report.show_threads)
1235 		use_browser = 0;
1236 	if (report.header || report.header_only)
1237 		report.tool.show_feat_hdr = SHOW_FEAT_HEADER;
1238 	if (report.show_full_info)
1239 		report.tool.show_feat_hdr = SHOW_FEAT_HEADER_FULL_INFO;
1240 	if (report.stats_mode || report.tasks_mode)
1241 		use_browser = 0;
1242 	if (report.stats_mode && report.tasks_mode) {
1243 		pr_err("Error: --tasks and --mmaps can't be used together with --stats\n");
1244 		goto error;
1245 	}
1246 
1247 	if (strcmp(input_name, "-") != 0)
1248 		setup_browser(true);
1249 	else
1250 		use_browser = 0;
1251 
1252 	if (setup_sorting(session->evlist) < 0) {
1253 		if (sort_order)
1254 			parse_options_usage(report_usage, options, "s", 1);
1255 		if (field_order)
1256 			parse_options_usage(sort_order ? NULL : report_usage,
1257 					    options, "F", 1);
1258 		goto error;
1259 	}
1260 
1261 	if ((report.header || report.header_only) && !quiet) {
1262 		perf_session__fprintf_info(session, stdout,
1263 					   report.show_full_info);
1264 		if (report.header_only) {
1265 			ret = 0;
1266 			goto error;
1267 		}
1268 	} else if (use_browser == 0 && !quiet &&
1269 		   !report.stats_mode && !report.tasks_mode) {
1270 		fputs("# To display the perf.data header info, please use --header/--header-only options.\n#\n",
1271 		      stdout);
1272 	}
1273 
1274 	/*
1275 	 * Only in the TUI browser we are doing integrated annotation,
1276 	 * so don't allocate extra space that won't be used in the stdio
1277 	 * implementation.
1278 	 */
1279 	if (ui__has_annotation()) {
1280 		ret = symbol__annotation_init();
1281 		if (ret < 0)
1282 			goto error;
1283 		/*
1284  		 * For searching by name on the "Browse map details".
1285  		 * providing it only in verbose mode not to bloat too
1286  		 * much struct symbol.
1287  		 */
1288 		if (verbose > 0) {
1289 			/*
1290 			 * XXX: Need to provide a less kludgy way to ask for
1291 			 * more space per symbol, the u32 is for the index on
1292 			 * the ui browser.
1293 			 * See symbol__browser_index.
1294 			 */
1295 			symbol_conf.priv_size += sizeof(u32);
1296 			symbol_conf.sort_by_name = true;
1297 		}
1298 	}
1299 
1300 	if (symbol__init(&session->header.env) < 0)
1301 		goto error;
1302 
1303 	report.ptime_range = perf_time__range_alloc(report.time_str,
1304 						    &report.range_size);
1305 	if (!report.ptime_range) {
1306 		ret = -ENOMEM;
1307 		goto error;
1308 	}
1309 
1310 	if (perf_time__parse_str(report.ptime_range, report.time_str) != 0) {
1311 		if (session->evlist->first_sample_time == 0 &&
1312 		    session->evlist->last_sample_time == 0) {
1313 			pr_err("HINT: no first/last sample time found in perf data.\n"
1314 			       "Please use latest perf binary to execute 'perf record'\n"
1315 			       "(if '--buildid-all' is enabled, please set '--timestamp-boundary').\n");
1316 			ret = -EINVAL;
1317 			goto error;
1318 		}
1319 
1320 		report.range_num = perf_time__percent_parse_str(
1321 					report.ptime_range, report.range_size,
1322 					report.time_str,
1323 					session->evlist->first_sample_time,
1324 					session->evlist->last_sample_time);
1325 
1326 		if (report.range_num < 0) {
1327 			pr_err("Invalid time string\n");
1328 			ret = -EINVAL;
1329 			goto error;
1330 		}
1331 	} else {
1332 		report.range_num = 1;
1333 	}
1334 
1335 	sort__setup_elide(stdout);
1336 
1337 	ret = __cmd_report(&report);
1338 	if (ret == K_SWITCH_INPUT_DATA) {
1339 		perf_session__delete(session);
1340 		goto repeat;
1341 	} else
1342 		ret = 0;
1343 
1344 error:
1345 	zfree(&report.ptime_range);
1346 
1347 	perf_session__delete(session);
1348 	return ret;
1349 }
1350