1 /* 2 * builtin-annotate.c 3 * 4 * Builtin annotate command: Analyze the perf.data input file, 5 * look up and read DSOs and symbol information and display 6 * a histogram of results, along various sorting keys. 7 */ 8 #include "builtin.h" 9 10 #include "util/util.h" 11 #include "util/color.h" 12 #include <linux/list.h> 13 #include "util/cache.h" 14 #include <linux/rbtree.h> 15 #include "util/symbol.h" 16 17 #include "perf.h" 18 #include "util/debug.h" 19 20 #include "util/evlist.h" 21 #include "util/evsel.h" 22 #include "util/annotate.h" 23 #include "util/event.h" 24 #include "util/parse-options.h" 25 #include "util/parse-events.h" 26 #include "util/thread.h" 27 #include "util/sort.h" 28 #include "util/hist.h" 29 #include "util/session.h" 30 31 #include <linux/bitmap.h> 32 33 static char const *input_name = "perf.data"; 34 35 static bool force, use_tui, use_stdio; 36 37 static bool full_paths; 38 39 static bool print_line; 40 41 static const char *sym_hist_filter; 42 43 static const char *cpu_list; 44 static DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS); 45 46 static int perf_evlist__add_sample(struct perf_evlist *evlist, 47 struct perf_sample *sample, 48 struct perf_evsel *evsel, 49 struct addr_location *al) 50 { 51 struct hist_entry *he; 52 int ret; 53 54 if (sym_hist_filter != NULL && 55 (al->sym == NULL || strcmp(sym_hist_filter, al->sym->name) != 0)) { 56 /* We're only interested in a symbol named sym_hist_filter */ 57 if (al->sym != NULL) { 58 rb_erase(&al->sym->rb_node, 59 &al->map->dso->symbols[al->map->type]); 60 symbol__delete(al->sym); 61 } 62 return 0; 63 } 64 65 he = __hists__add_entry(&evsel->hists, al, NULL, 1); 66 if (he == NULL) 67 return -ENOMEM; 68 69 ret = 0; 70 if (he->ms.sym != NULL) { 71 struct annotation *notes = symbol__annotation(he->ms.sym); 72 if (notes->src == NULL && 73 symbol__alloc_hist(he->ms.sym, evlist->nr_entries) < 0) 74 return -ENOMEM; 75 76 ret = hist_entry__inc_addr_samples(he, evsel->idx, al->addr); 77 } 78 79 evsel->hists.stats.total_period += sample->period; 80 hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE); 81 return ret; 82 } 83 84 static int process_sample_event(union perf_event *event, 85 struct perf_sample *sample, 86 struct perf_evsel *evsel, 87 struct perf_session *session) 88 { 89 struct addr_location al; 90 91 if (perf_event__preprocess_sample(event, session, &al, sample, 92 symbol__annotate_init) < 0) { 93 pr_warning("problem processing %d event, skipping it.\n", 94 event->header.type); 95 return -1; 96 } 97 98 if (cpu_list && !test_bit(sample->cpu, cpu_bitmap)) 99 return 0; 100 101 if (!al.filtered && 102 perf_evlist__add_sample(session->evlist, sample, evsel, &al)) { 103 pr_warning("problem incrementing symbol count, " 104 "skipping event\n"); 105 return -1; 106 } 107 108 return 0; 109 } 110 111 static int hist_entry__tty_annotate(struct hist_entry *he, int evidx) 112 { 113 return symbol__tty_annotate(he->ms.sym, he->ms.map, evidx, 114 print_line, full_paths, 0, 0); 115 } 116 117 static void hists__find_annotations(struct hists *self, int evidx) 118 { 119 struct rb_node *nd = rb_first(&self->entries), *next; 120 int key = KEY_RIGHT; 121 122 while (nd) { 123 struct hist_entry *he = rb_entry(nd, struct hist_entry, rb_node); 124 struct annotation *notes; 125 126 if (he->ms.sym == NULL || he->ms.map->dso->annotate_warned) 127 goto find_next; 128 129 notes = symbol__annotation(he->ms.sym); 130 if (notes->src == NULL) { 131 find_next: 132 if (key == KEY_LEFT) 133 nd = rb_prev(nd); 134 else 135 nd = rb_next(nd); 136 continue; 137 } 138 139 if (use_browser > 0) { 140 key = hist_entry__tui_annotate(he, evidx); 141 switch (key) { 142 case KEY_RIGHT: 143 next = rb_next(nd); 144 break; 145 case KEY_LEFT: 146 next = rb_prev(nd); 147 break; 148 default: 149 return; 150 } 151 152 if (next != NULL) 153 nd = next; 154 } else { 155 hist_entry__tty_annotate(he, evidx); 156 nd = rb_next(nd); 157 /* 158 * Since we have a hist_entry per IP for the same 159 * symbol, free he->ms.sym->src to signal we already 160 * processed this symbol. 161 */ 162 free(notes->src); 163 notes->src = NULL; 164 } 165 } 166 } 167 168 static struct perf_event_ops event_ops = { 169 .sample = process_sample_event, 170 .mmap = perf_event__process_mmap, 171 .comm = perf_event__process_comm, 172 .fork = perf_event__process_task, 173 .ordered_samples = true, 174 .ordering_requires_timestamps = true, 175 }; 176 177 static int __cmd_annotate(void) 178 { 179 int ret; 180 struct perf_session *session; 181 struct perf_evsel *pos; 182 u64 total_nr_samples; 183 184 session = perf_session__new(input_name, O_RDONLY, force, false, &event_ops); 185 if (session == NULL) 186 return -ENOMEM; 187 188 if (cpu_list) { 189 ret = perf_session__cpu_bitmap(session, cpu_list, cpu_bitmap); 190 if (ret) 191 goto out_delete; 192 } 193 194 ret = perf_session__process_events(session, &event_ops); 195 if (ret) 196 goto out_delete; 197 198 if (dump_trace) { 199 perf_session__fprintf_nr_events(session, stdout); 200 goto out_delete; 201 } 202 203 if (verbose > 3) 204 perf_session__fprintf(session, stdout); 205 206 if (verbose > 2) 207 perf_session__fprintf_dsos(session, stdout); 208 209 total_nr_samples = 0; 210 list_for_each_entry(pos, &session->evlist->entries, node) { 211 struct hists *hists = &pos->hists; 212 u32 nr_samples = hists->stats.nr_events[PERF_RECORD_SAMPLE]; 213 214 if (nr_samples > 0) { 215 total_nr_samples += nr_samples; 216 hists__collapse_resort(hists); 217 hists__output_resort(hists); 218 hists__find_annotations(hists, pos->idx); 219 } 220 } 221 222 if (total_nr_samples == 0) { 223 ui__warning("The %s file has no samples!\n", input_name); 224 goto out_delete; 225 } 226 out_delete: 227 /* 228 * Speed up the exit process, for large files this can 229 * take quite a while. 230 * 231 * XXX Enable this when using valgrind or if we ever 232 * librarize this command. 233 * 234 * Also experiment with obstacks to see how much speed 235 * up we'll get here. 236 * 237 * perf_session__delete(session); 238 */ 239 return ret; 240 } 241 242 static const char * const annotate_usage[] = { 243 "perf annotate [<options>] <command>", 244 NULL 245 }; 246 247 static const struct option options[] = { 248 OPT_STRING('i', "input", &input_name, "file", 249 "input file name"), 250 OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]", 251 "only consider symbols in these dsos"), 252 OPT_STRING('s', "symbol", &sym_hist_filter, "symbol", 253 "symbol to annotate"), 254 OPT_BOOLEAN('f', "force", &force, "don't complain, do it"), 255 OPT_INCR('v', "verbose", &verbose, 256 "be more verbose (show symbol address, etc)"), 257 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace, 258 "dump raw trace in ASCII"), 259 OPT_BOOLEAN(0, "tui", &use_tui, "Use the TUI interface"), 260 OPT_BOOLEAN(0, "stdio", &use_stdio, "Use the stdio interface"), 261 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name, 262 "file", "vmlinux pathname"), 263 OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules, 264 "load module symbols - WARNING: use only with -k and LIVE kernel"), 265 OPT_BOOLEAN('l', "print-line", &print_line, 266 "print matching source lines (may be slow)"), 267 OPT_BOOLEAN('P', "full-paths", &full_paths, 268 "Don't shorten the displayed pathnames"), 269 OPT_STRING('c', "cpu", &cpu_list, "cpu", "list of cpus to profile"), 270 OPT_END() 271 }; 272 273 int cmd_annotate(int argc, const char **argv, const char *prefix __used) 274 { 275 argc = parse_options(argc, argv, options, annotate_usage, 0); 276 277 if (use_stdio) 278 use_browser = 0; 279 else if (use_tui) 280 use_browser = 1; 281 282 setup_browser(true); 283 284 symbol_conf.priv_size = sizeof(struct annotation); 285 symbol_conf.try_vmlinux_path = true; 286 287 if (symbol__init() < 0) 288 return -1; 289 290 setup_sorting(annotate_usage, options); 291 292 if (argc) { 293 /* 294 * Special case: if there's an argument left then assume tha 295 * it's a symbol filter: 296 */ 297 if (argc > 1) 298 usage_with_options(annotate_usage, options); 299 300 sym_hist_filter = argv[0]; 301 } 302 303 if (field_sep && *field_sep == '.') { 304 pr_err("'.' is the only non valid --field-separator argument\n"); 305 return -1; 306 } 307 308 return __cmd_annotate(); 309 } 310