Pandora Sourcecodes - pandora-kernel.git/blob

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

32 #include <linux/bitmap.h>

33

34 struct perf_annotate {

35 struct perf_tool tool;

36 char const *input_name;

37 bool force, use_tui, use_stdio;

38 bool full_paths;

39 bool print_line;

40 const char *sym_hist_filter;

41 const char *cpu_list;

42 DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);

43 };

44

45 static int perf_evsel__add_sample(struct perf_evsel *evsel,

46 struct perf_sample *sample,

47 struct addr_location *al,

48 struct perf_annotate *ann)

49 {

50 struct hist_entry *he;

51 int ret;

52

53 if (ann->sym_hist_filter != NULL &&

54 (al->sym == NULL ||

55 strcmp(ann->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 && symbol__alloc_hist(he->ms.sym) < 0)

73 return -ENOMEM;

74

75 ret = hist_entry__inc_addr_samples(he, evsel->idx, al->addr);

76 }

77

78 evsel->hists.stats.total_period += sample->period;

79 hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE);

80 return ret;

81 }

82

83 static int process_sample_event(struct perf_tool *tool,

84 union perf_event *event,

85 struct perf_sample *sample,

86 struct perf_evsel *evsel,

87 struct machine *machine)

88 {

89 struct perf_annotate *ann = container_of(tool, struct perf_annotate, tool);

90 struct addr_location al;

91

92 if (perf_event__preprocess_sample(event, machine, &al, sample,

93 symbol__annotate_init) < 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, int evidx,

112 struct perf_annotate *ann)

113 {

114 return symbol__tty_annotate(he->ms.sym, he->ms.map, evidx,

115 ann->print_line, ann->full_paths, 0, 0);

116 }

117

118 static void hists__find_annotations(struct hists *self, int evidx,

119 struct perf_annotate *ann)

120 {

121 struct rb_node *nd = rb_first(&self->entries), *next;

122 int key = K_RIGHT;

123

124 while (nd) {

125 struct hist_entry *he = rb_entry(nd, struct hist_entry, rb_node);

126 struct annotation *notes;

127

128 if (he->ms.sym == NULL || he->ms.map->dso->annotate_warned)

129 goto find_next;

130

131 notes = symbol__annotation(he->ms.sym);

132 if (notes->src == NULL) {

133 find_next:

134 if (key == K_LEFT)

135 nd = rb_prev(nd);

136 else

137 nd = rb_next(nd);

138 continue;

139 }

140

141 if (use_browser > 0) {

142 key = hist_entry__tui_annotate(he, evidx, NULL, NULL, 0);

143 switch (key) {

144 case K_RIGHT:

145 next = rb_next(nd);

146 break;

147 case K_LEFT:

148 next = rb_prev(nd);

149 break;

150 default:

151 return;

152 }

153

154 if (next != NULL)

155 nd = next;

156 } else {

157 hist_entry__tty_annotate(he, evidx, ann);

158 nd = rb_next(nd);

159 /*

160 * Since we have a hist_entry per IP for the same

161 * symbol, free he->ms.sym->src to signal we already

162 * processed this symbol.

163 */

164 free(notes->src);

165 notes->src = NULL;

166 }

167 }

168 }

169

170 static int __cmd_annotate(struct perf_annotate *ann)

171 {

172 int ret;

173 struct perf_session *session;

174 struct perf_evsel *pos;

175 u64 total_nr_samples;

176

177 session = perf_session__new(ann->input_name, O_RDONLY,

178 ann->force, false, &ann->tool);

179 if (session == NULL)

180 return -ENOMEM;

181

182 if (ann->cpu_list) {

183 ret = perf_session__cpu_bitmap(session, ann->cpu_list,

184 ann->cpu_bitmap);

185 if (ret)

186 goto out_delete;

187 }

188

189 ret = perf_session__process_events(session, &ann->tool);

190 if (ret)

191 goto out_delete;

192

193 if (dump_trace) {

194 perf_session__fprintf_nr_events(session, stdout);

195 goto out_delete;

196 }

197

198 if (verbose > 3)

199 perf_session__fprintf(session, stdout);

200

201 if (verbose > 2)

202 perf_session__fprintf_dsos(session, stdout);

203

204 total_nr_samples = 0;

205 list_for_each_entry(pos, &session->evlist->entries, node) {

206 struct hists *hists = &pos->hists;

207 u32 nr_samples = hists->stats.nr_events[PERF_RECORD_SAMPLE];

208

209 if (nr_samples > 0) {

210 total_nr_samples += nr_samples;

211 hists__collapse_resort(hists);

212 hists__output_resort(hists);

213 hists__find_annotations(hists, pos->idx, ann);

214 }

215 }

216

217 if (total_nr_samples == 0) {

218 ui__warning("The %s file has no samples!\n", ann->input_name);

219 goto out_delete;

220 }

221 out_delete:

222 /*

223 * Speed up the exit process, for large files this can

224 * take quite a while.

225 *

226 * XXX Enable this when using valgrind or if we ever

227 * librarize this command.

228 *

229 * Also experiment with obstacks to see how much speed

230 * up we'll get here.

231 *

232 * perf_session__delete(session);

233 */

234 return ret;

235 }

236

237 static const char * const annotate_usage[] = {

238 "perf annotate [<options>] <command>",

239 NULL

240 };

241

242 int cmd_annotate(int argc, const char **argv, const char *prefix __used)

243 {

244 struct perf_annotate annotate = {

245 .tool = {

246 .sample = process_sample_event,

247 .mmap = perf_event__process_mmap,

248 .comm = perf_event__process_comm,

249 .fork = perf_event__process_task,

250 .ordered_samples = true,

251 .ordering_requires_timestamps = true,

252 },

253 .input_name = "perf.data",

254 };

255 const struct option options[] = {

256 OPT_STRING('i', "input", &annotate.input_name, "file",

257 "input file name"),

258 OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",

259 "only consider symbols in these dsos"),

260 OPT_STRING('s', "symbol", &annotate.sym_hist_filter, "symbol",

261 "symbol to annotate"),

262 OPT_BOOLEAN('f', "force", &annotate.force, "don't complain, do it"),

263 OPT_INCR('v', "verbose", &verbose,

264 "be more verbose (show symbol address, etc)"),

265 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,

266 "dump raw trace in ASCII"),

267 OPT_BOOLEAN(0, "tui", &annotate.use_tui, "Use the TUI interface"),

268 OPT_BOOLEAN(0, "stdio", &annotate.use_stdio, "Use the stdio interface"),

269 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,

270 "file", "vmlinux pathname"),

271 OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,

272 "load module symbols - WARNING: use only with -k and LIVE kernel"),

273 OPT_BOOLEAN('l', "print-line", &annotate.print_line,

274 "print matching source lines (may be slow)"),

275 OPT_BOOLEAN('P', "full-paths", &annotate.full_paths,

276 "Don't shorten the displayed pathnames"),

277 OPT_STRING('c', "cpu", &annotate.cpu_list, "cpu", "list of cpus to profile"),

278 OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",

279 "Look for files with symbols relative to this directory"),

280 OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src,

281 "Interleave source code with assembly code (default)"),

282 OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw,

283 "Display raw encoding of assembly instructions (default)"),

284 OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",

285 "Specify disassembler style (e.g. -M intel for intel syntax)"),

286 OPT_END()

287 };

288

289 argc = parse_options(argc, argv, options, annotate_usage, 0);

290

291 if (annotate.use_stdio)

292 use_browser = 0;

293 else if (annotate.use_tui)

294 use_browser = 1;

295

296 setup_browser(true);

297

298 symbol_conf.priv_size = sizeof(struct annotation);

299 symbol_conf.try_vmlinux_path = true;

300

301 if (symbol__init() < 0)

302 return -1;

303

304 setup_sorting(annotate_usage, options);

305

306 if (argc) {

307 /*

308 * Special case: if there's an argument left then assume tha

309 * it's a symbol filter:

310 */

311 if (argc > 1)

312 usage_with_options(annotate_usage, options);

313

314 annotate.sym_hist_filter = argv[0];

315 }

316

317 if (field_sep && *field_sep == '.') {

318 pr_err("'.' is the only non valid --field-separator argument\n");

319 return -1;

320 }

321

322 return __cmd_annotate(&annotate);

323 }