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TOMOYO Linux Cross Reference
Linux/tools/perf/builtin-top.c

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  1 /*
  2  * builtin-top.c
  3  *
  4  * Builtin top command: Display a continuously updated profile of
  5  * any workload, CPU or specific PID.
  6  *
  7  * Copyright (C) 2008, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
  8  *               2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
  9  *
 10  * Improvements and fixes by:
 11  *
 12  *   Arjan van de Ven <arjan@linux.intel.com>
 13  *   Yanmin Zhang <yanmin.zhang@intel.com>
 14  *   Wu Fengguang <fengguang.wu@intel.com>
 15  *   Mike Galbraith <efault@gmx.de>
 16  *   Paul Mackerras <paulus@samba.org>
 17  *
 18  * Released under the GPL v2. (and only v2, not any later version)
 19  */
 20 #include "builtin.h"
 21 
 22 #include "perf.h"
 23 
 24 #include "util/annotate.h"
 25 #include "util/config.h"
 26 #include "util/color.h"
 27 #include "util/drv_configs.h"
 28 #include "util/evlist.h"
 29 #include "util/evsel.h"
 30 #include "util/event.h"
 31 #include "util/machine.h"
 32 #include "util/session.h"
 33 #include "util/symbol.h"
 34 #include "util/thread.h"
 35 #include "util/thread_map.h"
 36 #include "util/top.h"
 37 #include <linux/rbtree.h>
 38 #include <subcmd/parse-options.h>
 39 #include "util/parse-events.h"
 40 #include "util/cpumap.h"
 41 #include "util/xyarray.h"
 42 #include "util/sort.h"
 43 #include "util/term.h"
 44 #include "util/intlist.h"
 45 #include "util/parse-branch-options.h"
 46 #include "arch/common.h"
 47 
 48 #include "util/debug.h"
 49 
 50 #include <assert.h>
 51 #include <elf.h>
 52 #include <fcntl.h>
 53 
 54 #include <stdio.h>
 55 #include <termios.h>
 56 #include <unistd.h>
 57 #include <inttypes.h>
 58 
 59 #include <errno.h>
 60 #include <time.h>
 61 #include <sched.h>
 62 #include <signal.h>
 63 
 64 #include <sys/syscall.h>
 65 #include <sys/ioctl.h>
 66 #include <poll.h>
 67 #include <sys/prctl.h>
 68 #include <sys/wait.h>
 69 #include <sys/uio.h>
 70 #include <sys/utsname.h>
 71 #include <sys/mman.h>
 72 
 73 #include <linux/stringify.h>
 74 #include <linux/time64.h>
 75 #include <linux/types.h>
 76 
 77 #include "sane_ctype.h"
 78 
 79 static volatile int done;
 80 static volatile int resize;
 81 
 82 #define HEADER_LINE_NR  5
 83 
 84 static void perf_top__update_print_entries(struct perf_top *top)
 85 {
 86         top->print_entries = top->winsize.ws_row - HEADER_LINE_NR;
 87 }
 88 
 89 static void winch_sig(int sig __maybe_unused)
 90 {
 91         resize = 1;
 92 }
 93 
 94 static void perf_top__resize(struct perf_top *top)
 95 {
 96         get_term_dimensions(&top->winsize);
 97         perf_top__update_print_entries(top);
 98 }
 99 
100 static int perf_top__parse_source(struct perf_top *top, struct hist_entry *he)
101 {
102         struct perf_evsel *evsel = hists_to_evsel(he->hists);
103         struct symbol *sym;
104         struct annotation *notes;
105         struct map *map;
106         int err = -1;
107 
108         if (!he || !he->ms.sym)
109                 return -1;
110 
111         sym = he->ms.sym;
112         map = he->ms.map;
113 
114         /*
115          * We can't annotate with just /proc/kallsyms
116          */
117         if (map->dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS &&
118             !dso__is_kcore(map->dso)) {
119                 pr_err("Can't annotate %s: No vmlinux file was found in the "
120                        "path\n", sym->name);
121                 sleep(1);
122                 return -1;
123         }
124 
125         notes = symbol__annotation(sym);
126         pthread_mutex_lock(&notes->lock);
127 
128         if (!symbol__hists(sym, top->evlist->nr_entries)) {
129                 pthread_mutex_unlock(&notes->lock);
130                 pr_err("Not enough memory for annotating '%s' symbol!\n",
131                        sym->name);
132                 sleep(1);
133                 return err;
134         }
135 
136         err = symbol__annotate(sym, map, evsel, 0, &top->annotation_opts, NULL);
137         if (err == 0) {
138                 top->sym_filter_entry = he;
139         } else {
140                 char msg[BUFSIZ];
141                 symbol__strerror_disassemble(sym, map, err, msg, sizeof(msg));
142                 pr_err("Couldn't annotate %s: %s\n", sym->name, msg);
143         }
144 
145         pthread_mutex_unlock(&notes->lock);
146         return err;
147 }
148 
149 static void __zero_source_counters(struct hist_entry *he)
150 {
151         struct symbol *sym = he->ms.sym;
152         symbol__annotate_zero_histograms(sym);
153 }
154 
155 static void ui__warn_map_erange(struct map *map, struct symbol *sym, u64 ip)
156 {
157         struct utsname uts;
158         int err = uname(&uts);
159 
160         ui__warning("Out of bounds address found:\n\n"
161                     "Addr:   %" PRIx64 "\n"
162                     "DSO:    %s %c\n"
163                     "Map:    %" PRIx64 "-%" PRIx64 "\n"
164                     "Symbol: %" PRIx64 "-%" PRIx64 " %c %s\n"
165                     "Arch:   %s\n"
166                     "Kernel: %s\n"
167                     "Tools:  %s\n\n"
168                     "Not all samples will be on the annotation output.\n\n"
169                     "Please report to linux-kernel@vger.kernel.org\n",
170                     ip, map->dso->long_name, dso__symtab_origin(map->dso),
171                     map->start, map->end, sym->start, sym->end,
172                     sym->binding == STB_GLOBAL ? 'g' :
173                     sym->binding == STB_LOCAL  ? 'l' : 'w', sym->name,
174                     err ? "[unknown]" : uts.machine,
175                     err ? "[unknown]" : uts.release, perf_version_string);
176         if (use_browser <= 0)
177                 sleep(5);
178 
179         map->erange_warned = true;
180 }
181 
182 static void perf_top__record_precise_ip(struct perf_top *top,
183                                         struct hist_entry *he,
184                                         struct perf_sample *sample,
185                                         struct perf_evsel *evsel, u64 ip)
186 {
187         struct annotation *notes;
188         struct symbol *sym = he->ms.sym;
189         int err = 0;
190 
191         if (sym == NULL || (use_browser == 0 &&
192                             (top->sym_filter_entry == NULL ||
193                              top->sym_filter_entry->ms.sym != sym)))
194                 return;
195 
196         notes = symbol__annotation(sym);
197 
198         if (pthread_mutex_trylock(&notes->lock))
199                 return;
200 
201         err = hist_entry__inc_addr_samples(he, sample, evsel, ip);
202 
203         pthread_mutex_unlock(&notes->lock);
204 
205         if (unlikely(err)) {
206                 /*
207                  * This function is now called with he->hists->lock held.
208                  * Release it before going to sleep.
209                  */
210                 pthread_mutex_unlock(&he->hists->lock);
211 
212                 if (err == -ERANGE && !he->ms.map->erange_warned)
213                         ui__warn_map_erange(he->ms.map, sym, ip);
214                 else if (err == -ENOMEM) {
215                         pr_err("Not enough memory for annotating '%s' symbol!\n",
216                                sym->name);
217                         sleep(1);
218                 }
219 
220                 pthread_mutex_lock(&he->hists->lock);
221         }
222 }
223 
224 static void perf_top__show_details(struct perf_top *top)
225 {
226         struct hist_entry *he = top->sym_filter_entry;
227         struct perf_evsel *evsel = hists_to_evsel(he->hists);
228         struct annotation *notes;
229         struct symbol *symbol;
230         int more;
231 
232         if (!he)
233                 return;
234 
235         symbol = he->ms.sym;
236         notes = symbol__annotation(symbol);
237 
238         pthread_mutex_lock(&notes->lock);
239 
240         symbol__calc_percent(symbol, evsel);
241 
242         if (notes->src == NULL)
243                 goto out_unlock;
244 
245         printf("Showing %s for %s\n", perf_evsel__name(top->sym_evsel), symbol->name);
246         printf("  Events  Pcnt (>=%d%%)\n", top->annotation_opts.min_pcnt);
247 
248         more = symbol__annotate_printf(symbol, he->ms.map, top->sym_evsel, &top->annotation_opts);
249 
250         if (top->evlist->enabled) {
251                 if (top->zero)
252                         symbol__annotate_zero_histogram(symbol, top->sym_evsel->idx);
253                 else
254                         symbol__annotate_decay_histogram(symbol, top->sym_evsel->idx);
255         }
256         if (more != 0)
257                 printf("%d lines not displayed, maybe increase display entries [e]\n", more);
258 out_unlock:
259         pthread_mutex_unlock(&notes->lock);
260 }
261 
262 static void perf_top__print_sym_table(struct perf_top *top)
263 {
264         char bf[160];
265         int printed = 0;
266         const int win_width = top->winsize.ws_col - 1;
267         struct perf_evsel *evsel = top->sym_evsel;
268         struct hists *hists = evsel__hists(evsel);
269 
270         puts(CONSOLE_CLEAR);
271 
272         perf_top__header_snprintf(top, bf, sizeof(bf));
273         printf("%s\n", bf);
274 
275         perf_top__reset_sample_counters(top);
276 
277         printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
278 
279         if (!top->record_opts.overwrite &&
280             (hists->stats.nr_lost_warned !=
281             hists->stats.nr_events[PERF_RECORD_LOST])) {
282                 hists->stats.nr_lost_warned =
283                               hists->stats.nr_events[PERF_RECORD_LOST];
284                 color_fprintf(stdout, PERF_COLOR_RED,
285                               "WARNING: LOST %d chunks, Check IO/CPU overload",
286                               hists->stats.nr_lost_warned);
287                 ++printed;
288         }
289 
290         if (top->sym_filter_entry) {
291                 perf_top__show_details(top);
292                 return;
293         }
294 
295         if (top->evlist->enabled) {
296                 if (top->zero) {
297                         hists__delete_entries(hists);
298                 } else {
299                         hists__decay_entries(hists, top->hide_user_symbols,
300                                              top->hide_kernel_symbols);
301                 }
302         }
303 
304         hists__collapse_resort(hists, NULL);
305         perf_evsel__output_resort(evsel, NULL);
306 
307         hists__output_recalc_col_len(hists, top->print_entries - printed);
308         putchar('\n');
309         hists__fprintf(hists, false, top->print_entries - printed, win_width,
310                        top->min_percent, stdout, !symbol_conf.use_callchain);
311 }
312 
313 static void prompt_integer(int *target, const char *msg)
314 {
315         char *buf = malloc(0), *p;
316         size_t dummy = 0;
317         int tmp;
318 
319         fprintf(stdout, "\n%s: ", msg);
320         if (getline(&buf, &dummy, stdin) < 0)
321                 return;
322 
323         p = strchr(buf, '\n');
324         if (p)
325                 *p = 0;
326 
327         p = buf;
328         while(*p) {
329                 if (!isdigit(*p))
330                         goto out_free;
331                 p++;
332         }
333         tmp = strtoul(buf, NULL, 10);
334         *target = tmp;
335 out_free:
336         free(buf);
337 }
338 
339 static void prompt_percent(int *target, const char *msg)
340 {
341         int tmp = 0;
342 
343         prompt_integer(&tmp, msg);
344         if (tmp >= 0 && tmp <= 100)
345                 *target = tmp;
346 }
347 
348 static void perf_top__prompt_symbol(struct perf_top *top, const char *msg)
349 {
350         char *buf = malloc(0), *p;
351         struct hist_entry *syme = top->sym_filter_entry, *n, *found = NULL;
352         struct hists *hists = evsel__hists(top->sym_evsel);
353         struct rb_node *next;
354         size_t dummy = 0;
355 
356         /* zero counters of active symbol */
357         if (syme) {
358                 __zero_source_counters(syme);
359                 top->sym_filter_entry = NULL;
360         }
361 
362         fprintf(stdout, "\n%s: ", msg);
363         if (getline(&buf, &dummy, stdin) < 0)
364                 goto out_free;
365 
366         p = strchr(buf, '\n');
367         if (p)
368                 *p = 0;
369 
370         next = rb_first(&hists->entries);
371         while (next) {
372                 n = rb_entry(next, struct hist_entry, rb_node);
373                 if (n->ms.sym && !strcmp(buf, n->ms.sym->name)) {
374                         found = n;
375                         break;
376                 }
377                 next = rb_next(&n->rb_node);
378         }
379 
380         if (!found) {
381                 fprintf(stderr, "Sorry, %s is not active.\n", buf);
382                 sleep(1);
383         } else
384                 perf_top__parse_source(top, found);
385 
386 out_free:
387         free(buf);
388 }
389 
390 static void perf_top__print_mapped_keys(struct perf_top *top)
391 {
392         char *name = NULL;
393 
394         if (top->sym_filter_entry) {
395                 struct symbol *sym = top->sym_filter_entry->ms.sym;
396                 name = sym->name;
397         }
398 
399         fprintf(stdout, "\nMapped keys:\n");
400         fprintf(stdout, "\t[d]     display refresh delay.             \t(%d)\n", top->delay_secs);
401         fprintf(stdout, "\t[e]     display entries (lines).           \t(%d)\n", top->print_entries);
402 
403         if (top->evlist->nr_entries > 1)
404                 fprintf(stdout, "\t[E]     active event counter.              \t(%s)\n", perf_evsel__name(top->sym_evsel));
405 
406         fprintf(stdout, "\t[f]     profile display filter (count).    \t(%d)\n", top->count_filter);
407 
408         fprintf(stdout, "\t[F]     annotate display filter (percent). \t(%d%%)\n", top->annotation_opts.min_pcnt);
409         fprintf(stdout, "\t[s]     annotate symbol.                   \t(%s)\n", name?: "NULL");
410         fprintf(stdout, "\t[S]     stop annotation.\n");
411 
412         fprintf(stdout,
413                 "\t[K]     hide kernel symbols.             \t(%s)\n",
414                 top->hide_kernel_symbols ? "yes" : "no");
415         fprintf(stdout,
416                 "\t[U]     hide user symbols.               \t(%s)\n",
417                 top->hide_user_symbols ? "yes" : "no");
418         fprintf(stdout, "\t[z]     toggle sample zeroing.             \t(%d)\n", top->zero ? 1 : 0);
419         fprintf(stdout, "\t[qQ]    quit.\n");
420 }
421 
422 static int perf_top__key_mapped(struct perf_top *top, int c)
423 {
424         switch (c) {
425                 case 'd':
426                 case 'e':
427                 case 'f':
428                 case 'z':
429                 case 'q':
430                 case 'Q':
431                 case 'K':
432                 case 'U':
433                 case 'F':
434                 case 's':
435                 case 'S':
436                         return 1;
437                 case 'E':
438                         return top->evlist->nr_entries > 1 ? 1 : 0;
439                 default:
440                         break;
441         }
442 
443         return 0;
444 }
445 
446 static bool perf_top__handle_keypress(struct perf_top *top, int c)
447 {
448         bool ret = true;
449 
450         if (!perf_top__key_mapped(top, c)) {
451                 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
452                 struct termios save;
453 
454                 perf_top__print_mapped_keys(top);
455                 fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
456                 fflush(stdout);
457 
458                 set_term_quiet_input(&save);
459 
460                 poll(&stdin_poll, 1, -1);
461                 c = getc(stdin);
462 
463                 tcsetattr(0, TCSAFLUSH, &save);
464                 if (!perf_top__key_mapped(top, c))
465                         return ret;
466         }
467 
468         switch (c) {
469                 case 'd':
470                         prompt_integer(&top->delay_secs, "Enter display delay");
471                         if (top->delay_secs < 1)
472                                 top->delay_secs = 1;
473                         break;
474                 case 'e':
475                         prompt_integer(&top->print_entries, "Enter display entries (lines)");
476                         if (top->print_entries == 0) {
477                                 perf_top__resize(top);
478                                 signal(SIGWINCH, winch_sig);
479                         } else {
480                                 signal(SIGWINCH, SIG_DFL);
481                         }
482                         break;
483                 case 'E':
484                         if (top->evlist->nr_entries > 1) {
485                                 /* Select 0 as the default event: */
486                                 int counter = 0;
487 
488                                 fprintf(stderr, "\nAvailable events:");
489 
490                                 evlist__for_each_entry(top->evlist, top->sym_evsel)
491                                         fprintf(stderr, "\n\t%d %s", top->sym_evsel->idx, perf_evsel__name(top->sym_evsel));
492 
493                                 prompt_integer(&counter, "Enter details event counter");
494 
495                                 if (counter >= top->evlist->nr_entries) {
496                                         top->sym_evsel = perf_evlist__first(top->evlist);
497                                         fprintf(stderr, "Sorry, no such event, using %s.\n", perf_evsel__name(top->sym_evsel));
498                                         sleep(1);
499                                         break;
500                                 }
501                                 evlist__for_each_entry(top->evlist, top->sym_evsel)
502                                         if (top->sym_evsel->idx == counter)
503                                                 break;
504                         } else
505                                 top->sym_evsel = perf_evlist__first(top->evlist);
506                         break;
507                 case 'f':
508                         prompt_integer(&top->count_filter, "Enter display event count filter");
509                         break;
510                 case 'F':
511                         prompt_percent(&top->annotation_opts.min_pcnt,
512                                        "Enter details display event filter (percent)");
513                         break;
514                 case 'K':
515                         top->hide_kernel_symbols = !top->hide_kernel_symbols;
516                         break;
517                 case 'q':
518                 case 'Q':
519                         printf("exiting.\n");
520                         if (top->dump_symtab)
521                                 perf_session__fprintf_dsos(top->session, stderr);
522                         ret = false;
523                         break;
524                 case 's':
525                         perf_top__prompt_symbol(top, "Enter details symbol");
526                         break;
527                 case 'S':
528                         if (!top->sym_filter_entry)
529                                 break;
530                         else {
531                                 struct hist_entry *syme = top->sym_filter_entry;
532 
533                                 top->sym_filter_entry = NULL;
534                                 __zero_source_counters(syme);
535                         }
536                         break;
537                 case 'U':
538                         top->hide_user_symbols = !top->hide_user_symbols;
539                         break;
540                 case 'z':
541                         top->zero = !top->zero;
542                         break;
543                 default:
544                         break;
545         }
546 
547         return ret;
548 }
549 
550 static void perf_top__sort_new_samples(void *arg)
551 {
552         struct perf_top *t = arg;
553         struct perf_evsel *evsel = t->sym_evsel;
554         struct hists *hists;
555 
556         perf_top__reset_sample_counters(t);
557 
558         if (t->evlist->selected != NULL)
559                 t->sym_evsel = t->evlist->selected;
560 
561         hists = evsel__hists(evsel);
562 
563         if (t->evlist->enabled) {
564                 if (t->zero) {
565                         hists__delete_entries(hists);
566                 } else {
567                         hists__decay_entries(hists, t->hide_user_symbols,
568                                              t->hide_kernel_symbols);
569                 }
570         }
571 
572         hists__collapse_resort(hists, NULL);
573         perf_evsel__output_resort(evsel, NULL);
574 }
575 
576 static void *display_thread_tui(void *arg)
577 {
578         struct perf_evsel *pos;
579         struct perf_top *top = arg;
580         const char *help = "For a higher level overview, try: perf top --sort comm,dso";
581         struct hist_browser_timer hbt = {
582                 .timer          = perf_top__sort_new_samples,
583                 .arg            = top,
584                 .refresh        = top->delay_secs,
585         };
586 
587         /* In order to read symbols from other namespaces perf to  needs to call
588          * setns(2).  This isn't permitted if the struct_fs has multiple users.
589          * unshare(2) the fs so that we may continue to setns into namespaces
590          * that we're observing.
591          */
592         unshare(CLONE_FS);
593 
594         perf_top__sort_new_samples(top);
595 
596         /*
597          * Initialize the uid_filter_str, in the future the TUI will allow
598          * Zooming in/out UIDs. For now juse use whatever the user passed
599          * via --uid.
600          */
601         evlist__for_each_entry(top->evlist, pos) {
602                 struct hists *hists = evsel__hists(pos);
603                 hists->uid_filter_str = top->record_opts.target.uid_str;
604         }
605 
606         perf_evlist__tui_browse_hists(top->evlist, help, &hbt,
607                                       top->min_percent,
608                                       &top->session->header.env,
609                                       !top->record_opts.overwrite,
610                                       &top->annotation_opts);
611 
612         done = 1;
613         return NULL;
614 }
615 
616 static void display_sig(int sig __maybe_unused)
617 {
618         done = 1;
619 }
620 
621 static void display_setup_sig(void)
622 {
623         signal(SIGSEGV, sighandler_dump_stack);
624         signal(SIGFPE, sighandler_dump_stack);
625         signal(SIGINT,  display_sig);
626         signal(SIGQUIT, display_sig);
627         signal(SIGTERM, display_sig);
628 }
629 
630 static void *display_thread(void *arg)
631 {
632         struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
633         struct termios save;
634         struct perf_top *top = arg;
635         int delay_msecs, c;
636 
637         /* In order to read symbols from other namespaces perf to  needs to call
638          * setns(2).  This isn't permitted if the struct_fs has multiple users.
639          * unshare(2) the fs so that we may continue to setns into namespaces
640          * that we're observing.
641          */
642         unshare(CLONE_FS);
643 
644         display_setup_sig();
645         pthread__unblock_sigwinch();
646 repeat:
647         delay_msecs = top->delay_secs * MSEC_PER_SEC;
648         set_term_quiet_input(&save);
649         /* trash return*/
650         getc(stdin);
651 
652         while (!done) {
653                 perf_top__print_sym_table(top);
654                 /*
655                  * Either timeout expired or we got an EINTR due to SIGWINCH,
656                  * refresh screen in both cases.
657                  */
658                 switch (poll(&stdin_poll, 1, delay_msecs)) {
659                 case 0:
660                         continue;
661                 case -1:
662                         if (errno == EINTR)
663                                 continue;
664                         __fallthrough;
665                 default:
666                         c = getc(stdin);
667                         tcsetattr(0, TCSAFLUSH, &save);
668 
669                         if (perf_top__handle_keypress(top, c))
670                                 goto repeat;
671                         done = 1;
672                 }
673         }
674 
675         tcsetattr(0, TCSAFLUSH, &save);
676         return NULL;
677 }
678 
679 static int hist_iter__top_callback(struct hist_entry_iter *iter,
680                                    struct addr_location *al, bool single,
681                                    void *arg)
682 {
683         struct perf_top *top = arg;
684         struct hist_entry *he = iter->he;
685         struct perf_evsel *evsel = iter->evsel;
686 
687         if (perf_hpp_list.sym && single)
688                 perf_top__record_precise_ip(top, he, iter->sample, evsel, al->addr);
689 
690         hist__account_cycles(iter->sample->branch_stack, al, iter->sample,
691                      !(top->record_opts.branch_stack & PERF_SAMPLE_BRANCH_ANY));
692         return 0;
693 }
694 
695 static void perf_event__process_sample(struct perf_tool *tool,
696                                        const union perf_event *event,
697                                        struct perf_evsel *evsel,
698                                        struct perf_sample *sample,
699                                        struct machine *machine)
700 {
701         struct perf_top *top = container_of(tool, struct perf_top, tool);
702         struct addr_location al;
703         int err;
704 
705         if (!machine && perf_guest) {
706                 static struct intlist *seen;
707 
708                 if (!seen)
709                         seen = intlist__new(NULL);
710 
711                 if (!intlist__has_entry(seen, sample->pid)) {
712                         pr_err("Can't find guest [%d]'s kernel information\n",
713                                 sample->pid);
714                         intlist__add(seen, sample->pid);
715                 }
716                 return;
717         }
718 
719         if (!machine) {
720                 pr_err("%u unprocessable samples recorded.\r",
721                        top->session->evlist->stats.nr_unprocessable_samples++);
722                 return;
723         }
724 
725         if (event->header.misc & PERF_RECORD_MISC_EXACT_IP)
726                 top->exact_samples++;
727 
728         if (machine__resolve(machine, &al, sample) < 0)
729                 return;
730 
731         if (!machine->kptr_restrict_warned &&
732             symbol_conf.kptr_restrict &&
733             al.cpumode == PERF_RECORD_MISC_KERNEL) {
734                 if (!perf_evlist__exclude_kernel(top->session->evlist)) {
735                         ui__warning(
736 "Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
737 "Check /proc/sys/kernel/kptr_restrict.\n\n"
738 "Kernel%s samples will not be resolved.\n",
739                           al.map && map__has_symbols(al.map) ?
740                           " modules" : "");
741                         if (use_browser <= 0)
742                                 sleep(5);
743                 }
744                 machine->kptr_restrict_warned = true;
745         }
746 
747         if (al.sym == NULL && al.map != NULL) {
748                 const char *msg = "Kernel samples will not be resolved.\n";
749                 /*
750                  * As we do lazy loading of symtabs we only will know if the
751                  * specified vmlinux file is invalid when we actually have a
752                  * hit in kernel space and then try to load it. So if we get
753                  * here and there are _no_ symbols in the DSO backing the
754                  * kernel map, bail out.
755                  *
756                  * We may never get here, for instance, if we use -K/
757                  * --hide-kernel-symbols, even if the user specifies an
758                  * invalid --vmlinux ;-)
759                  */
760                 if (!machine->kptr_restrict_warned && !top->vmlinux_warned &&
761                     __map__is_kernel(al.map) && map__has_symbols(al.map)) {
762                         if (symbol_conf.vmlinux_name) {
763                                 char serr[256];
764                                 dso__strerror_load(al.map->dso, serr, sizeof(serr));
765                                 ui__warning("The %s file can't be used: %s\n%s",
766                                             symbol_conf.vmlinux_name, serr, msg);
767                         } else {
768                                 ui__warning("A vmlinux file was not found.\n%s",
769                                             msg);
770                         }
771 
772                         if (use_browser <= 0)
773                                 sleep(5);
774                         top->vmlinux_warned = true;
775                 }
776         }
777 
778         if (al.sym == NULL || !al.sym->idle) {
779                 struct hists *hists = evsel__hists(evsel);
780                 struct hist_entry_iter iter = {
781                         .evsel          = evsel,
782                         .sample         = sample,
783                         .add_entry_cb   = hist_iter__top_callback,
784                 };
785 
786                 if (symbol_conf.cumulate_callchain)
787                         iter.ops = &hist_iter_cumulative;
788                 else
789                         iter.ops = &hist_iter_normal;
790 
791                 pthread_mutex_lock(&hists->lock);
792 
793                 err = hist_entry_iter__add(&iter, &al, top->max_stack, top);
794                 if (err < 0)
795                         pr_err("Problem incrementing symbol period, skipping event\n");
796 
797                 pthread_mutex_unlock(&hists->lock);
798         }
799 
800         addr_location__put(&al);
801 }
802 
803 static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
804 {
805         struct record_opts *opts = &top->record_opts;
806         struct perf_evlist *evlist = top->evlist;
807         struct perf_sample sample;
808         struct perf_evsel *evsel;
809         struct perf_mmap *md;
810         struct perf_session *session = top->session;
811         union perf_event *event;
812         struct machine *machine;
813         int ret;
814 
815         md = opts->overwrite ? &evlist->overwrite_mmap[idx] : &evlist->mmap[idx];
816         if (perf_mmap__read_init(md) < 0)
817                 return;
818 
819         while ((event = perf_mmap__read_event(md)) != NULL) {
820                 ret = perf_evlist__parse_sample(evlist, event, &sample);
821                 if (ret) {
822                         pr_err("Can't parse sample, err = %d\n", ret);
823                         goto next_event;
824                 }
825 
826                 evsel = perf_evlist__id2evsel(session->evlist, sample.id);
827                 assert(evsel != NULL);
828 
829                 if (event->header.type == PERF_RECORD_SAMPLE)
830                         ++top->samples;
831 
832                 switch (sample.cpumode) {
833                 case PERF_RECORD_MISC_USER:
834                         ++top->us_samples;
835                         if (top->hide_user_symbols)
836                                 goto next_event;
837                         machine = &session->machines.host;
838                         break;
839                 case PERF_RECORD_MISC_KERNEL:
840                         ++top->kernel_samples;
841                         if (top->hide_kernel_symbols)
842                                 goto next_event;
843                         machine = &session->machines.host;
844                         break;
845                 case PERF_RECORD_MISC_GUEST_KERNEL:
846                         ++top->guest_kernel_samples;
847                         machine = perf_session__find_machine(session,
848                                                              sample.pid);
849                         break;
850                 case PERF_RECORD_MISC_GUEST_USER:
851                         ++top->guest_us_samples;
852                         /*
853                          * TODO: we don't process guest user from host side
854                          * except simple counting.
855                          */
856                         goto next_event;
857                 default:
858                         if (event->header.type == PERF_RECORD_SAMPLE)
859                                 goto next_event;
860                         machine = &session->machines.host;
861                         break;
862                 }
863 
864 
865                 if (event->header.type == PERF_RECORD_SAMPLE) {
866                         perf_event__process_sample(&top->tool, event, evsel,
867                                                    &sample, machine);
868                 } else if (event->header.type < PERF_RECORD_MAX) {
869                         hists__inc_nr_events(evsel__hists(evsel), event->header.type);
870                         machine__process_event(machine, event, &sample);
871                 } else
872                         ++session->evlist->stats.nr_unknown_events;
873 next_event:
874                 perf_mmap__consume(md);
875         }
876 
877         perf_mmap__read_done(md);
878 }
879 
880 static void perf_top__mmap_read(struct perf_top *top)
881 {
882         bool overwrite = top->record_opts.overwrite;
883         struct perf_evlist *evlist = top->evlist;
884         unsigned long long start, end;
885         int i;
886 
887         start = rdclock();
888         if (overwrite)
889                 perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_DATA_PENDING);
890 
891         for (i = 0; i < top->evlist->nr_mmaps; i++)
892                 perf_top__mmap_read_idx(top, i);
893 
894         if (overwrite) {
895                 perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_EMPTY);
896                 perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_RUNNING);
897         }
898         end = rdclock();
899 
900         if ((end - start) > (unsigned long long)top->delay_secs * NSEC_PER_SEC)
901                 ui__warning("Too slow to read ring buffer.\n"
902                             "Please try increasing the period (-c) or\n"
903                             "decreasing the freq (-F) or\n"
904                             "limiting the number of CPUs (-C)\n");
905 }
906 
907 /*
908  * Check per-event overwrite term.
909  * perf top should support consistent term for all events.
910  * - All events don't have per-event term
911  *   E.g. "cpu/cpu-cycles/,cpu/instructions/"
912  *   Nothing change, return 0.
913  * - All events have same per-event term
914  *   E.g. "cpu/cpu-cycles,no-overwrite/,cpu/instructions,no-overwrite/
915  *   Using the per-event setting to replace the opts->overwrite if
916  *   they are different, then return 0.
917  * - Events have different per-event term
918  *   E.g. "cpu/cpu-cycles,overwrite/,cpu/instructions,no-overwrite/"
919  *   Return -1
920  * - Some of the event set per-event term, but some not.
921  *   E.g. "cpu/cpu-cycles/,cpu/instructions,no-overwrite/"
922  *   Return -1
923  */
924 static int perf_top__overwrite_check(struct perf_top *top)
925 {
926         struct record_opts *opts = &top->record_opts;
927         struct perf_evlist *evlist = top->evlist;
928         struct perf_evsel_config_term *term;
929         struct list_head *config_terms;
930         struct perf_evsel *evsel;
931         int set, overwrite = -1;
932 
933         evlist__for_each_entry(evlist, evsel) {
934                 set = -1;
935                 config_terms = &evsel->config_terms;
936                 list_for_each_entry(term, config_terms, list) {
937                         if (term->type == PERF_EVSEL__CONFIG_TERM_OVERWRITE)
938                                 set = term->val.overwrite ? 1 : 0;
939                 }
940 
941                 /* no term for current and previous event (likely) */
942                 if ((overwrite < 0) && (set < 0))
943                         continue;
944 
945                 /* has term for both current and previous event, compare */
946                 if ((overwrite >= 0) && (set >= 0) && (overwrite != set))
947                         return -1;
948 
949                 /* no term for current event but has term for previous one */
950                 if ((overwrite >= 0) && (set < 0))
951                         return -1;
952 
953                 /* has term for current event */
954                 if ((overwrite < 0) && (set >= 0)) {
955                         /* if it's first event, set overwrite */
956                         if (evsel == perf_evlist__first(evlist))
957                                 overwrite = set;
958                         else
959                                 return -1;
960                 }
961         }
962 
963         if ((overwrite >= 0) && (opts->overwrite != overwrite))
964                 opts->overwrite = overwrite;
965 
966         return 0;
967 }
968 
969 static int perf_top_overwrite_fallback(struct perf_top *top,
970                                        struct perf_evsel *evsel)
971 {
972         struct record_opts *opts = &top->record_opts;
973         struct perf_evlist *evlist = top->evlist;
974         struct perf_evsel *counter;
975 
976         if (!opts->overwrite)
977                 return 0;
978 
979         /* only fall back when first event fails */
980         if (evsel != perf_evlist__first(evlist))
981                 return 0;
982 
983         evlist__for_each_entry(evlist, counter)
984                 counter->attr.write_backward = false;
985         opts->overwrite = false;
986         pr_debug2("fall back to non-overwrite mode\n");
987         return 1;
988 }
989 
990 static int perf_top__start_counters(struct perf_top *top)
991 {
992         char msg[BUFSIZ];
993         struct perf_evsel *counter;
994         struct perf_evlist *evlist = top->evlist;
995         struct record_opts *opts = &top->record_opts;
996 
997         if (perf_top__overwrite_check(top)) {
998                 ui__error("perf top only support consistent per-event "
999                           "overwrite setting for all events\n");
1000                 goto out_err;
1001         }
1002 
1003         perf_evlist__config(evlist, opts, &callchain_param);
1004 
1005         evlist__for_each_entry(evlist, counter) {
1006 try_again:
1007                 if (perf_evsel__open(counter, top->evlist->cpus,
1008                                      top->evlist->threads) < 0) {
1009 
1010                         /*
1011                          * Specially handle overwrite fall back.
1012                          * Because perf top is the only tool which has
1013                          * overwrite mode by default, support
1014                          * both overwrite and non-overwrite mode, and
1015                          * require consistent mode for all events.
1016                          *
1017                          * May move it to generic code with more tools
1018                          * have similar attribute.
1019                          */
1020                         if (perf_missing_features.write_backward &&
1021                             perf_top_overwrite_fallback(top, counter))
1022                                 goto try_again;
1023 
1024                         if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
1025                                 if (verbose > 0)
1026                                         ui__warning("%s\n", msg);
1027                                 goto try_again;
1028                         }
1029 
1030                         perf_evsel__open_strerror(counter, &opts->target,
1031                                                   errno, msg, sizeof(msg));
1032                         ui__error("%s\n", msg);
1033                         goto out_err;
1034                 }
1035         }
1036 
1037         if (perf_evlist__mmap(evlist, opts->mmap_pages) < 0) {
1038                 ui__error("Failed to mmap with %d (%s)\n",
1039                             errno, str_error_r(errno, msg, sizeof(msg)));
1040                 goto out_err;
1041         }
1042 
1043         return 0;
1044 
1045 out_err:
1046         return -1;
1047 }
1048 
1049 static int callchain_param__setup_sample_type(struct callchain_param *callchain)
1050 {
1051         if (!perf_hpp_list.sym) {
1052                 if (callchain->enabled) {
1053                         ui__error("Selected -g but \"sym\" not present in --sort/-s.");
1054                         return -EINVAL;
1055                 }
1056         } else if (callchain->mode != CHAIN_NONE) {
1057                 if (callchain_register_param(callchain) < 0) {
1058                         ui__error("Can't register callchain params.\n");
1059                         return -EINVAL;
1060                 }
1061         }
1062 
1063         return 0;
1064 }
1065 
1066 static int __cmd_top(struct perf_top *top)
1067 {
1068         char msg[512];
1069         struct perf_evsel *pos;
1070         struct perf_evsel_config_term *err_term;
1071         struct perf_evlist *evlist = top->evlist;
1072         struct record_opts *opts = &top->record_opts;
1073         pthread_t thread;
1074         int ret;
1075 
1076         top->session = perf_session__new(NULL, false, NULL);
1077         if (top->session == NULL)
1078                 return -1;
1079 
1080         if (!top->annotation_opts.objdump_path) {
1081                 ret = perf_env__lookup_objdump(&top->session->header.env,
1082                                                &top->annotation_opts.objdump_path);
1083                 if (ret)
1084                         goto out_delete;
1085         }
1086 
1087         ret = callchain_param__setup_sample_type(&callchain_param);
1088         if (ret)
1089                 goto out_delete;
1090 
1091         if (perf_session__register_idle_thread(top->session) < 0)
1092                 goto out_delete;
1093 
1094         if (top->nr_threads_synthesize > 1)
1095                 perf_set_multithreaded();
1096 
1097         machine__synthesize_threads(&top->session->machines.host, &opts->target,
1098                                     top->evlist->threads, false,
1099                                     opts->proc_map_timeout,
1100                                     top->nr_threads_synthesize);
1101 
1102         if (top->nr_threads_synthesize > 1)
1103                 perf_set_singlethreaded();
1104 
1105         if (perf_hpp_list.socket) {
1106                 ret = perf_env__read_cpu_topology_map(&perf_env);
1107                 if (ret < 0)
1108                         goto out_err_cpu_topo;
1109         }
1110 
1111         ret = perf_top__start_counters(top);
1112         if (ret)
1113                 goto out_delete;
1114 
1115         ret = perf_evlist__apply_drv_configs(evlist, &pos, &err_term);
1116         if (ret) {
1117                 pr_err("failed to set config \"%s\" on event %s with %d (%s)\n",
1118                         err_term->val.drv_cfg, perf_evsel__name(pos), errno,
1119                         str_error_r(errno, msg, sizeof(msg)));
1120                 goto out_delete;
1121         }
1122 
1123         top->session->evlist = top->evlist;
1124         perf_session__set_id_hdr_size(top->session);
1125 
1126         /*
1127          * When perf is starting the traced process, all the events (apart from
1128          * group members) have enable_on_exec=1 set, so don't spoil it by
1129          * prematurely enabling them.
1130          *
1131          * XXX 'top' still doesn't start workloads like record, trace, but should,
1132          * so leave the check here.
1133          */
1134         if (!target__none(&opts->target))
1135                 perf_evlist__enable(top->evlist);
1136 
1137         ret = -1;
1138         if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui :
1139                                                             display_thread), top)) {
1140                 ui__error("Could not create display thread.\n");
1141                 goto out_delete;
1142         }
1143 
1144         if (top->realtime_prio) {
1145                 struct sched_param param;
1146 
1147                 param.sched_priority = top->realtime_prio;
1148                 if (sched_setscheduler(0, SCHED_FIFO, &param)) {
1149                         ui__error("Could not set realtime priority.\n");
1150                         goto out_join;
1151                 }
1152         }
1153 
1154         /* Wait for a minimal set of events before starting the snapshot */
1155         perf_evlist__poll(top->evlist, 100);
1156 
1157         perf_top__mmap_read(top);
1158 
1159         while (!done) {
1160                 u64 hits = top->samples;
1161 
1162                 perf_top__mmap_read(top);
1163 
1164                 if (opts->overwrite || (hits == top->samples))
1165                         ret = perf_evlist__poll(top->evlist, 100);
1166 
1167                 if (resize) {
1168                         perf_top__resize(top);
1169                         resize = 0;
1170                 }
1171         }
1172 
1173         ret = 0;
1174 out_join:
1175         pthread_join(thread, NULL);
1176 out_delete:
1177         perf_session__delete(top->session);
1178         top->session = NULL;
1179 
1180         return ret;
1181 
1182 out_err_cpu_topo: {
1183         char errbuf[BUFSIZ];
1184         const char *err = str_error_r(-ret, errbuf, sizeof(errbuf));
1185 
1186         ui__error("Could not read the CPU topology map: %s\n", err);
1187         goto out_delete;
1188 }
1189 }
1190 
1191 static int
1192 callchain_opt(const struct option *opt, const char *arg, int unset)
1193 {
1194         symbol_conf.use_callchain = true;
1195         return record_callchain_opt(opt, arg, unset);
1196 }
1197 
1198 static int
1199 parse_callchain_opt(const struct option *opt, const char *arg, int unset)
1200 {
1201         struct callchain_param *callchain = opt->value;
1202 
1203         callchain->enabled = !unset;
1204         callchain->record_mode = CALLCHAIN_FP;
1205 
1206         /*
1207          * --no-call-graph
1208          */
1209         if (unset) {
1210                 symbol_conf.use_callchain = false;
1211                 callchain->record_mode = CALLCHAIN_NONE;
1212                 return 0;
1213         }
1214 
1215         return parse_callchain_top_opt(arg);
1216 }
1217 
1218 static int perf_top_config(const char *var, const char *value, void *cb __maybe_unused)
1219 {
1220         if (!strcmp(var, "top.call-graph")) {
1221                 var = "call-graph.record-mode";
1222                 return perf_default_config(var, value, cb);
1223         }
1224         if (!strcmp(var, "top.children")) {
1225                 symbol_conf.cumulate_callchain = perf_config_bool(var, value);
1226                 return 0;
1227         }
1228 
1229         return 0;
1230 }
1231 
1232 static int
1233 parse_percent_limit(const struct option *opt, const char *arg,
1234                     int unset __maybe_unused)
1235 {
1236         struct perf_top *top = opt->value;
1237 
1238         top->min_percent = strtof(arg, NULL);
1239         return 0;
1240 }
1241 
1242 const char top_callchain_help[] = CALLCHAIN_RECORD_HELP CALLCHAIN_REPORT_HELP
1243         "\n\t\t\t\tDefault: fp,graph,0.5,caller,function";
1244 
1245 int cmd_top(int argc, const char **argv)
1246 {
1247         char errbuf[BUFSIZ];
1248         struct perf_top top = {
1249                 .count_filter        = 5,
1250                 .delay_secs          = 2,
1251                 .record_opts = {
1252                         .mmap_pages     = UINT_MAX,
1253                         .user_freq      = UINT_MAX,
1254                         .user_interval  = ULLONG_MAX,
1255                         .freq           = 4000, /* 4 KHz */
1256                         .target         = {
1257                                 .uses_mmap   = true,
1258                         },
1259                         .proc_map_timeout    = 500,
1260                         /*
1261                          * FIXME: This will lose PERF_RECORD_MMAP and other metadata
1262                          * when we pause, fix that and reenable. Probably using a
1263                          * separate evlist with a dummy event, i.e. a non-overwrite
1264                          * ring buffer just for metadata events, while PERF_RECORD_SAMPLE
1265                          * stays in overwrite mode. -acme
1266                          * */
1267                         .overwrite      = 0,
1268                 },
1269                 .max_stack           = sysctl__max_stack(),
1270                 .annotation_opts     = annotation__default_options,
1271                 .nr_threads_synthesize = UINT_MAX,
1272         };
1273         struct record_opts *opts = &top.record_opts;
1274         struct target *target = &opts->target;
1275         const struct option options[] = {
1276         OPT_CALLBACK('e', "event", &top.evlist, "event",
1277                      "event selector. use 'perf list' to list available events",
1278                      parse_events_option),
1279         OPT_U64('c', "count", &opts->user_interval, "event period to sample"),
1280         OPT_STRING('p', "pid", &target->pid, "pid",
1281                     "profile events on existing process id"),
1282         OPT_STRING('t', "tid", &target->tid, "tid",
1283                     "profile events on existing thread id"),
1284         OPT_BOOLEAN('a', "all-cpus", &target->system_wide,
1285                             "system-wide collection from all CPUs"),
1286         OPT_STRING('C', "cpu", &target->cpu_list, "cpu",
1287                     "list of cpus to monitor"),
1288         OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1289                    "file", "vmlinux pathname"),
1290         OPT_BOOLEAN(0, "ignore-vmlinux", &symbol_conf.ignore_vmlinux,
1291                     "don't load vmlinux even if found"),
1292         OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols,
1293                     "hide kernel symbols"),
1294         OPT_CALLBACK('m', "mmap-pages", &opts->mmap_pages, "pages",
1295                      "number of mmap data pages",
1296                      perf_evlist__parse_mmap_pages),
1297         OPT_INTEGER('r', "realtime", &top.realtime_prio,
1298                     "collect data with this RT SCHED_FIFO priority"),
1299         OPT_INTEGER('d', "delay", &top.delay_secs,
1300                     "number of seconds to delay between refreshes"),
1301         OPT_BOOLEAN('D', "dump-symtab", &top.dump_symtab,
1302                             "dump the symbol table used for profiling"),
1303         OPT_INTEGER('f', "count-filter", &top.count_filter,
1304                     "only display functions with more events than this"),
1305         OPT_BOOLEAN(0, "group", &opts->group,
1306                             "put the counters into a counter group"),
1307         OPT_BOOLEAN('i', "no-inherit", &opts->no_inherit,
1308                     "child tasks do not inherit counters"),
1309         OPT_STRING(0, "sym-annotate", &top.sym_filter, "symbol name",
1310                     "symbol to annotate"),
1311         OPT_BOOLEAN('z', "zero", &top.zero, "zero history across updates"),
1312         OPT_CALLBACK('F', "freq", &top.record_opts, "freq or 'max'",
1313                      "profile at this frequency",
1314                       record__parse_freq),
1315         OPT_INTEGER('E', "entries", &top.print_entries,
1316                     "display this many functions"),
1317         OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols,
1318                     "hide user symbols"),
1319         OPT_BOOLEAN(0, "tui", &top.use_tui, "Use the TUI interface"),
1320         OPT_BOOLEAN(0, "stdio", &top.use_stdio, "Use the stdio interface"),
1321         OPT_INCR('v', "verbose", &verbose,
1322                     "be more verbose (show counter open errors, etc)"),
1323         OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1324                    "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline, ..."
1325                    " Please refer the man page for the complete list."),
1326         OPT_STRING(0, "fields", &field_order, "key[,keys...]",
1327                    "output field(s): overhead, period, sample plus all of sort keys"),
1328         OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
1329                     "Show a column with the number of samples"),
1330         OPT_CALLBACK_NOOPT('g', NULL, &callchain_param,
1331                            NULL, "enables call-graph recording and display",
1332                            &callchain_opt),
1333         OPT_CALLBACK(0, "call-graph", &callchain_param,
1334                      "record_mode[,record_size],print_type,threshold[,print_limit],order,sort_key[,branch]",
1335                      top_callchain_help, &parse_callchain_opt),
1336         OPT_BOOLEAN(0, "children", &symbol_conf.cumulate_callchain,
1337                     "Accumulate callchains of children and show total overhead as well"),
1338         OPT_INTEGER(0, "max-stack", &top.max_stack,
1339                     "Set the maximum stack depth when parsing the callchain. "
1340                     "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
1341         OPT_CALLBACK(0, "ignore-callees", NULL, "regex",
1342                    "ignore callees of these functions in call graphs",
1343                    report_parse_ignore_callees_opt),
1344         OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
1345                     "Show a column with the sum of periods"),
1346         OPT_STRING(0, "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
1347                    "only consider symbols in these dsos"),
1348         OPT_STRING(0, "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1349                    "only consider symbols in these comms"),
1350         OPT_STRING(0, "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1351                    "only consider these symbols"),
1352         OPT_BOOLEAN(0, "source", &top.annotation_opts.annotate_src,
1353                     "Interleave source code with assembly code (default)"),
1354         OPT_BOOLEAN(0, "asm-raw", &top.annotation_opts.show_asm_raw,
1355                     "Display raw encoding of assembly instructions (default)"),
1356         OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
1357                     "Enable kernel symbol demangling"),
1358         OPT_STRING(0, "objdump", &top.annotation_opts.objdump_path, "path",
1359                     "objdump binary to use for disassembly and annotations"),
1360         OPT_STRING('M', "disassembler-style", &top.annotation_opts.disassembler_style, "disassembler style",
1361                    "Specify disassembler style (e.g. -M intel for intel syntax)"),
1362         OPT_STRING('u', "uid", &target->uid_str, "user", "user to profile"),
1363         OPT_CALLBACK(0, "percent-limit", &top, "percent",
1364                      "Don't show entries under that percent", parse_percent_limit),
1365         OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",
1366                      "How to display percentage of filtered entries", parse_filter_percentage),
1367         OPT_STRING('w', "column-widths", &symbol_conf.col_width_list_str,
1368                    "width[,width...]",
1369                    "don't try to adjust column width, use these fixed values"),
1370         OPT_UINTEGER(0, "proc-map-timeout", &opts->proc_map_timeout,
1371                         "per thread proc mmap processing timeout in ms"),
1372         OPT_CALLBACK_NOOPT('b', "branch-any", &opts->branch_stack,
1373                      "branch any", "sample any taken branches",
1374                      parse_branch_stack),
1375         OPT_CALLBACK('j', "branch-filter", &opts->branch_stack,
1376                      "branch filter mask", "branch stack filter modes",
1377                      parse_branch_stack),
1378         OPT_BOOLEAN(0, "raw-trace", &symbol_conf.raw_trace,
1379                     "Show raw trace event output (do not use print fmt or plugins)"),
1380         OPT_BOOLEAN(0, "hierarchy", &symbol_conf.report_hierarchy,
1381                     "Show entries in a hierarchy"),
1382         OPT_BOOLEAN(0, "overwrite", &top.record_opts.overwrite,
1383                     "Use a backward ring buffer, default: no"),
1384         OPT_BOOLEAN(0, "force", &symbol_conf.force, "don't complain, do it"),
1385         OPT_UINTEGER(0, "num-thread-synthesize", &top.nr_threads_synthesize,
1386                         "number of thread to run event synthesize"),
1387         OPT_END()
1388         };
1389         const char * const top_usage[] = {
1390                 "perf top [<options>]",
1391                 NULL
1392         };
1393         int status = hists__init();
1394 
1395         if (status < 0)
1396                 return status;
1397 
1398         top.annotation_opts.min_pcnt = 5;
1399         top.annotation_opts.context  = 4;
1400 
1401         top.evlist = perf_evlist__new();
1402         if (top.evlist == NULL)
1403                 return -ENOMEM;
1404 
1405         status = perf_config(perf_top_config, &top);
1406         if (status)
1407                 return status;
1408 
1409         argc = parse_options(argc, argv, options, top_usage, 0);
1410         if (argc)
1411                 usage_with_options(top_usage, options);
1412 
1413         if (!top.evlist->nr_entries &&
1414             perf_evlist__add_default(top.evlist) < 0) {
1415                 pr_err("Not enough memory for event selector list\n");
1416                 goto out_delete_evlist;
1417         }
1418 
1419         if (symbol_conf.report_hierarchy) {
1420                 /* disable incompatible options */
1421                 symbol_conf.event_group = false;
1422                 symbol_conf.cumulate_callchain = false;
1423 
1424                 if (field_order) {
1425                         pr_err("Error: --hierarchy and --fields options cannot be used together\n");
1426                         parse_options_usage(top_usage, options, "fields", 0);
1427                         parse_options_usage(NULL, options, "hierarchy", 0);
1428                         goto out_delete_evlist;
1429                 }
1430         }
1431 
1432         if (opts->branch_stack && callchain_param.enabled)
1433                 symbol_conf.show_branchflag_count = true;
1434 
1435         sort__mode = SORT_MODE__TOP;
1436         /* display thread wants entries to be collapsed in a different tree */
1437         perf_hpp_list.need_collapse = 1;
1438 
1439         if (top.use_stdio)
1440                 use_browser = 0;
1441         else if (top.use_tui)
1442                 use_browser = 1;
1443 
1444         setup_browser(false);
1445 
1446         if (setup_sorting(top.evlist) < 0) {
1447                 if (sort_order)
1448                         parse_options_usage(top_usage, options, "s", 1);
1449                 if (field_order)
1450                         parse_options_usage(sort_order ? NULL : top_usage,
1451                                             options, "fields", 0);
1452                 goto out_delete_evlist;
1453         }
1454 
1455         status = target__validate(target);
1456         if (status) {
1457                 target__strerror(target, status, errbuf, BUFSIZ);
1458                 ui__warning("%s\n", errbuf);
1459         }
1460 
1461         status = target__parse_uid(target);
1462         if (status) {
1463                 int saved_errno = errno;
1464 
1465                 target__strerror(target, status, errbuf, BUFSIZ);
1466                 ui__error("%s\n", errbuf);
1467 
1468                 status = -saved_errno;
1469                 goto out_delete_evlist;
1470         }
1471 
1472         if (target__none(target))
1473                 target->system_wide = true;
1474 
1475         if (perf_evlist__create_maps(top.evlist, target) < 0) {
1476                 ui__error("Couldn't create thread/CPU maps: %s\n",
1477                           errno == ENOENT ? "No such process" : str_error_r(errno, errbuf, sizeof(errbuf)));
1478                 goto out_delete_evlist;
1479         }
1480 
1481         if (top.delay_secs < 1)
1482                 top.delay_secs = 1;
1483 
1484         if (record_opts__config(opts)) {
1485                 status = -EINVAL;
1486                 goto out_delete_evlist;
1487         }
1488 
1489         top.sym_evsel = perf_evlist__first(top.evlist);
1490 
1491         if (!callchain_param.enabled) {
1492                 symbol_conf.cumulate_callchain = false;
1493                 perf_hpp__cancel_cumulate();
1494         }
1495 
1496         if (symbol_conf.cumulate_callchain && !callchain_param.order_set)
1497                 callchain_param.order = ORDER_CALLER;
1498 
1499         status = symbol__annotation_init();
1500         if (status < 0)
1501                 goto out_delete_evlist;
1502 
1503         annotation_config__init();
1504 
1505         symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
1506         if (symbol__init(NULL) < 0)
1507                 return -1;
1508 
1509         sort__setup_elide(stdout);
1510 
1511         get_term_dimensions(&top.winsize);
1512         if (top.print_entries == 0) {
1513                 perf_top__update_print_entries(&top);
1514                 signal(SIGWINCH, winch_sig);
1515         }
1516 
1517         status = __cmd_top(&top);
1518 
1519 out_delete_evlist:
1520         perf_evlist__delete(top.evlist);
1521 
1522         return status;
1523 }
1524 

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