tools/perf/builtin-annotate.c

   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 #include "util/tool.h"
  31 #include "arch/common.h"
  32
  33 #include <linux/bitmap.h>
  34
  35 struct perf_annotate {
  36         struct perf_tool tool;
  37         bool       force, use_tui, use_stdio, use_gtk;
  38         bool       full_paths;
  39         bool       print_line;
  40         bool       skip_missing;
  41         const char *sym_hist_filter;
  42         const char *cpu_list;
  43         DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
  44 };
  45
  46 static int perf_evsel__add_sample(struct perf_evsel *evsel,
  47                                   struct perf_sample *sample,
  48                                   struct addr_location *al,
  49                                   struct perf_annotate *ann)
  50 {
  51         struct hist_entry *he;
  52         int ret;
  53
  54         if (ann->sym_hist_filter != NULL &&
  55             (al->sym == NULL ||
  56              strcmp(ann->sym_hist_filter, al->sym->name) != 0)) {
  57                 /* We're only interested in a symbol named sym_hist_filter */
  58                 if (al->sym != NULL) {
  59                         rb_erase(&al->sym->rb_node,
  60                                  &al->map->dso->symbols[al->map->type]);
  61                         symbol__delete(al->sym);
  62                 }
  63                 return 0;
  64         }
  65
  66         he = __hists__add_entry(&evsel->hists, al, NULL, 1, 1);
  67         if (he == NULL)
  68                 return -ENOMEM;
  69
  70         ret = 0;
  71         if (he->ms.sym != NULL) {
  72                 struct annotation *notes = symbol__annotation(he->ms.sym);
  73                 if (notes->src == NULL && symbol__alloc_hist(he->ms.sym) < 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(struct perf_tool *tool,
  85                                 union perf_event *event,
  86                                 struct perf_sample *sample,
  87                                 struct perf_evsel *evsel,
  88                                 struct machine *machine)
  89 {
  90         struct perf_annotate *ann = container_of(tool, struct perf_annotate, tool);
  91         struct addr_location al;
  92
  93         if (perf_event__preprocess_sample(event, machine, &al, sample) < 0) {
  94                 pr_warning("problem processing %d event, skipping it.\n",
  95                            event->header.type);
  96                 return -1;
  97         }
  98
  99         if (ann->cpu_list && !test_bit(sample->cpu, ann->cpu_bitmap))
 100                 return 0;
 101
 102         if (!al.filtered && perf_evsel__add_sample(evsel, sample, &al, ann)) {
 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,
 112                                     struct perf_evsel *evsel,
 113                                     struct perf_annotate *ann)
 114 {
 115         return symbol__tty_annotate(he->ms.sym, he->ms.map, evsel,
 116                                     ann->print_line, ann->full_paths, 0, 0);
 117 }
 118
 119 static void hists__find_annotations(struct hists *self,
 120                                     struct perf_evsel *evsel,
 121                                     struct perf_annotate *ann)
 122 {
 123         struct rb_node *nd = rb_first(&self->entries), *next;
 124         int key = K_RIGHT;
 125
 126         while (nd) {
 127                 struct hist_entry *he = rb_entry(nd, struct hist_entry, rb_node);
 128                 struct annotation *notes;
 129
 130                 if (he->ms.sym == NULL || he->ms.map->dso->annotate_warned)
 131                         goto find_next;
 132
 133                 notes = symbol__annotation(he->ms.sym);
 134                 if (notes->src == NULL) {
 135 find_next:
 136                         if (key == K_LEFT)
 137                                 nd = rb_prev(nd);
 138                         else
 139                                 nd = rb_next(nd);
 140                         continue;
 141                 }
 142
 143                 if (use_browser == 2) {
 144                         int ret;
 145
 146                         ret = hist_entry__gtk_annotate(he, evsel, NULL);
 147                         if (!ret || !ann->skip_missing)
 148                                 return;
 149
 150                         /* skip missing symbols */
 151                         nd = rb_next(nd);
 152                 } else if (use_browser == 1) {
 153                         key = hist_entry__tui_annotate(he, evsel, NULL);
 154                         switch (key) {
 155                         case -1:
 156                                 if (!ann->skip_missing)
 157                                         return;
 158                                 /* fall through */
 159                         case K_RIGHT:
 160                                 next = rb_next(nd);
 161                                 break;
 162                         case K_LEFT:
 163                                 next = rb_prev(nd);
 164                                 break;
 165                         default:
 166                                 return;
 167                         }
 168
 169                         if (next != NULL)
 170                                 nd = next;
 171                 } else {
 172                         hist_entry__tty_annotate(he, evsel, ann);
 173                         nd = rb_next(nd);
 174                         /*
 175                          * Since we have a hist_entry per IP for the same
 176                          * symbol, free he->ms.sym->src to signal we already
 177                          * processed this symbol.
 178                          */
 179                         free(notes->src);
 180                         notes->src = NULL;
 181                 }
 182         }
 183 }
 184
 185 static int __cmd_annotate(struct perf_annotate *ann)
 186 {
 187         int ret;
 188         struct perf_session *session;
 189         struct perf_evsel *pos;
 190         u64 total_nr_samples;
 191
 192         session = perf_session__new(input_name, O_RDONLY,
 193                                     ann->force, false, &ann->tool);
 194         if (session == NULL)
 195                 return -ENOMEM;
 196
 197         machines__set_symbol_filter(&session->machines, symbol__annotate_init);
 198
 199         if (ann->cpu_list) {
 200                 ret = perf_session__cpu_bitmap(session, ann->cpu_list,
 201                                                ann->cpu_bitmap);
 202                 if (ret)
 203                         goto out_delete;
 204         }
 205
 206         if (!objdump_path) {
 207                 ret = perf_session_env__lookup_objdump(&session->header.env);
 208                 if (ret)
 209                         goto out_delete;
 210         }
 211
 212         ret = perf_session__process_events(session, &ann->tool);
 213         if (ret)
 214                 goto out_delete;
 215
 216         if (dump_trace) {
 217                 perf_session__fprintf_nr_events(session, stdout);
 218                 goto out_delete;
 219         }
 220
 221         if (verbose > 3)
 222                 perf_session__fprintf(session, stdout);
 223
 224         if (verbose > 2)
 225                 perf_session__fprintf_dsos(session, stdout);
 226
 227         total_nr_samples = 0;
 228         list_for_each_entry(pos, &session->evlist->entries, node) {
 229                 struct hists *hists = &pos->hists;
 230                 u32 nr_samples = hists->stats.nr_events[PERF_RECORD_SAMPLE];
 231
 232                 if (nr_samples > 0) {
 233                         total_nr_samples += nr_samples;
 234                         hists__collapse_resort(hists);
 235                         hists__output_resort(hists);
 236
 237                         if (symbol_conf.event_group &&
 238                             !perf_evsel__is_group_leader(pos))
 239                                 continue;
 240
 241                         hists__find_annotations(hists, pos, ann);
 242                 }
 243         }
 244
 245         if (total_nr_samples == 0) {
 246                 ui__error("The %s file has no samples!\n", session->filename);
 247                 goto out_delete;
 248         }
 249
 250         if (use_browser == 2)
 251                 perf_gtk__show_annotations();
 252
 253 out_delete:
 254         /*
 255          * Speed up the exit process, for large files this can
 256          * take quite a while.
 257          *
 258          * XXX Enable this when using valgrind or if we ever
 259          * librarize this command.
 260          *
 261          * Also experiment with obstacks to see how much speed
 262          * up we'll get here.
 263          *
 264          * perf_session__delete(session);
 265          */
 266         return ret;
 267 }
 268
 269 static const char * const annotate_usage[] = {
 270         "perf annotate [<options>]",
 271         NULL
 272 };
 273
 274 int cmd_annotate(int argc, const char **argv, const char *prefix __maybe_unused)
 275 {
 276         struct perf_annotate annotate = {
 277                 .tool = {
 278                         .sample = process_sample_event,
 279                         .mmap   = perf_event__process_mmap,
 280                         .comm   = perf_event__process_comm,
 281                         .exit   = perf_event__process_exit,
 282                         .fork   = perf_event__process_fork,
 283                         .ordered_samples = true,
 284                         .ordering_requires_timestamps = true,
 285                 },
 286         };
 287         const struct option options[] = {
 288         OPT_STRING('i', "input", &input_name, "file",
 289                     "input file name"),
 290         OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
 291                    "only consider symbols in these dsos"),
 292         OPT_STRING('s', "symbol", &annotate.sym_hist_filter, "symbol",
 293                     "symbol to annotate"),
 294         OPT_BOOLEAN('f', "force", &annotate.force, "don't complain, do it"),
 295         OPT_INCR('v', "verbose", &verbose,
 296                     "be more verbose (show symbol address, etc)"),
 297         OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
 298                     "dump raw trace in ASCII"),
 299         OPT_BOOLEAN(0, "gtk", &annotate.use_gtk, "Use the GTK interface"),
 300         OPT_BOOLEAN(0, "tui", &annotate.use_tui, "Use the TUI interface"),
 301         OPT_BOOLEAN(0, "stdio", &annotate.use_stdio, "Use the stdio interface"),
 302         OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
 303                    "file", "vmlinux pathname"),
 304         OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
 305                     "load module symbols - WARNING: use only with -k and LIVE kernel"),
 306         OPT_BOOLEAN('l', "print-line", &annotate.print_line,
 307                     "print matching source lines (may be slow)"),
 308         OPT_BOOLEAN('P', "full-paths", &annotate.full_paths,
 309                     "Don't shorten the displayed pathnames"),
 310         OPT_BOOLEAN(0, "skip-missing", &annotate.skip_missing,
 311                     "Skip symbols that cannot be annotated"),
 312         OPT_STRING('C', "cpu", &annotate.cpu_list, "cpu", "list of cpus to profile"),
 313         OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
 314                    "Look for files with symbols relative to this directory"),
 315         OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src,
 316                     "Interleave source code with assembly code (default)"),
 317         OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw,
 318                     "Display raw encoding of assembly instructions (default)"),
 319         OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
 320                    "Specify disassembler style (e.g. -M intel for intel syntax)"),
 321         OPT_STRING(0, "objdump", &objdump_path, "path",
 322                    "objdump binary to use for disassembly and annotations"),
 323         OPT_BOOLEAN(0, "group", &symbol_conf.event_group,
 324                     "Show event group information together"),
 325         OPT_END()
 326         };
 327
 328         argc = parse_options(argc, argv, options, annotate_usage, 0);
 329
 330         if (annotate.use_stdio)
 331                 use_browser = 0;
 332         else if (annotate.use_tui)
 333                 use_browser = 1;
 334         else if (annotate.use_gtk)
 335                 use_browser = 2;
 336
 337         setup_browser(true);
 338
 339         symbol_conf.priv_size = sizeof(struct annotation);
 340         symbol_conf.try_vmlinux_path = true;
 341
 342         if (symbol__init() < 0)
 343                 return -1;
 344
 345         if (setup_sorting() < 0)
 346                 usage_with_options(annotate_usage, options);
 347
 348         if (argc) {
 349                 /*
 350                  * Special case: if there's an argument left then assume tha
 351                  * it's a symbol filter:
 352                  */
 353                 if (argc > 1)
 354                         usage_with_options(annotate_usage, options);
 355
 356                 annotate.sym_hist_filter = argv[0];
 357         }
 358
 359         return __cmd_annotate(&annotate);
 360 }