Commit | Line | Data |
---|---|---|
bf9e1876 IM |
1 | /* |
2 | * perf.c | |
3 | * | |
4 | * Performance analysis utility. | |
5 | * | |
6 | * This is the main hub from which the sub-commands (perf stat, | |
7 | * perf top, perf record, perf report, etc.) are started. | |
8 | */ | |
07800601 | 9 | #include "builtin.h" |
bf9e1876 | 10 | |
aa36ddd7 | 11 | #include "util/env.h" |
148be2c1 IM |
12 | #include "util/exec_cmd.h" |
13 | #include "util/cache.h" | |
14 | #include "util/quote.h" | |
15 | #include "util/run-command.h" | |
5beeded1 | 16 | #include "util/parse-events.h" |
7335399a | 17 | #include "util/parse-options.h" |
bbb2cea7 | 18 | #include "util/debug.h" |
592d5a6b | 19 | #include <api/fs/tracing_path.h> |
27683dc5 | 20 | #include <pthread.h> |
07800601 IM |
21 | |
22 | const char perf_usage_string[] = | |
78a1b503 | 23 | "perf [--version] [--help] [OPTIONS] COMMAND [ARGS]"; |
07800601 IM |
24 | |
25 | const char perf_more_info_string[] = | |
26 | "See 'perf help COMMAND' for more information on a specific command."; | |
27 | ||
5d06e691 | 28 | int use_browser = -1; |
07800601 | 29 | static int use_pager = -1; |
70cb4e96 | 30 | const char *input_name; |
5d06e691 | 31 | |
98a4179c FW |
32 | struct cmd_struct { |
33 | const char *cmd; | |
34 | int (*fn)(int, const char **, const char *); | |
35 | int option; | |
36 | }; | |
37 | ||
38 | static struct cmd_struct commands[] = { | |
39 | { "buildid-cache", cmd_buildid_cache, 0 }, | |
40 | { "buildid-list", cmd_buildid_list, 0 }, | |
41 | { "diff", cmd_diff, 0 }, | |
42 | { "evlist", cmd_evlist, 0 }, | |
43 | { "help", cmd_help, 0 }, | |
44 | { "list", cmd_list, 0 }, | |
45 | { "record", cmd_record, 0 }, | |
46 | { "report", cmd_report, 0 }, | |
47 | { "bench", cmd_bench, 0 }, | |
48 | { "stat", cmd_stat, 0 }, | |
49 | { "timechart", cmd_timechart, 0 }, | |
50 | { "top", cmd_top, 0 }, | |
51 | { "annotate", cmd_annotate, 0 }, | |
52 | { "version", cmd_version, 0 }, | |
53 | { "script", cmd_script, 0 }, | |
54 | { "sched", cmd_sched, 0 }, | |
89fe808a | 55 | #ifdef HAVE_LIBELF_SUPPORT |
98a4179c | 56 | { "probe", cmd_probe, 0 }, |
393be2e3 | 57 | #endif |
98a4179c FW |
58 | { "kmem", cmd_kmem, 0 }, |
59 | { "lock", cmd_lock, 0 }, | |
60 | { "kvm", cmd_kvm, 0 }, | |
61 | { "test", cmd_test, 0 }, | |
89fe808a | 62 | #ifdef HAVE_LIBAUDIT_SUPPORT |
514f1c67 | 63 | { "trace", cmd_trace, 0 }, |
4d29089c | 64 | #endif |
98a4179c | 65 | { "inject", cmd_inject, 0 }, |
028f12ee | 66 | { "mem", cmd_mem, 0 }, |
2245bf14 | 67 | { "data", cmd_data, 0 }, |
98a4179c FW |
68 | }; |
69 | ||
07800601 IM |
70 | struct pager_config { |
71 | const char *cmd; | |
72 | int val; | |
73 | }; | |
74 | ||
75 | static int pager_command_config(const char *var, const char *value, void *data) | |
76 | { | |
77 | struct pager_config *c = data; | |
78 | if (!prefixcmp(var, "pager.") && !strcmp(var + 6, c->cmd)) | |
79 | c->val = perf_config_bool(var, value); | |
80 | return 0; | |
81 | } | |
82 | ||
83 | /* returns 0 for "no pager", 1 for "use pager", and -1 for "not specified" */ | |
84 | int check_pager_config(const char *cmd) | |
85 | { | |
86 | struct pager_config c; | |
87 | c.cmd = cmd; | |
88 | c.val = -1; | |
89 | perf_config(pager_command_config, &c); | |
90 | return c.val; | |
91 | } | |
92 | ||
0020ce23 | 93 | static int browser_command_config(const char *var, const char *value, void *data) |
5d06e691 ACM |
94 | { |
95 | struct pager_config *c = data; | |
96 | if (!prefixcmp(var, "tui.") && !strcmp(var + 4, c->cmd)) | |
97 | c->val = perf_config_bool(var, value); | |
0020ce23 NK |
98 | if (!prefixcmp(var, "gtk.") && !strcmp(var + 4, c->cmd)) |
99 | c->val = perf_config_bool(var, value) ? 2 : 0; | |
5d06e691 ACM |
100 | return 0; |
101 | } | |
102 | ||
0020ce23 NK |
103 | /* |
104 | * returns 0 for "no tui", 1 for "use tui", 2 for "use gtk", | |
105 | * and -1 for "not specified" | |
106 | */ | |
107 | static int check_browser_config(const char *cmd) | |
5d06e691 ACM |
108 | { |
109 | struct pager_config c; | |
110 | c.cmd = cmd; | |
111 | c.val = -1; | |
0020ce23 | 112 | perf_config(browser_command_config, &c); |
5d06e691 ACM |
113 | return c.val; |
114 | } | |
115 | ||
4c574159 TF |
116 | static void commit_pager_choice(void) |
117 | { | |
07800601 IM |
118 | switch (use_pager) { |
119 | case 0: | |
120 | setenv("PERF_PAGER", "cat", 1); | |
121 | break; | |
122 | case 1: | |
123 | /* setup_pager(); */ | |
124 | break; | |
125 | default: | |
126 | break; | |
127 | } | |
128 | } | |
129 | ||
7335399a YS |
130 | struct option options[] = { |
131 | OPT_ARGUMENT("help", "help"), | |
132 | OPT_ARGUMENT("version", "version"), | |
133 | OPT_ARGUMENT("exec-path", "exec-path"), | |
134 | OPT_ARGUMENT("html-path", "html-path"), | |
135 | OPT_ARGUMENT("paginate", "paginate"), | |
136 | OPT_ARGUMENT("no-pager", "no-pager"), | |
137 | OPT_ARGUMENT("perf-dir", "perf-dir"), | |
138 | OPT_ARGUMENT("work-tree", "work-tree"), | |
139 | OPT_ARGUMENT("debugfs-dir", "debugfs-dir"), | |
140 | OPT_ARGUMENT("buildid-dir", "buildid-dir"), | |
141 | OPT_ARGUMENT("list-cmds", "list-cmds"), | |
142 | OPT_ARGUMENT("list-opts", "list-opts"), | |
143 | OPT_ARGUMENT("debug", "debug"), | |
144 | OPT_END() | |
145 | }; | |
146 | ||
4c574159 | 147 | static int handle_options(const char ***argv, int *argc, int *envchanged) |
07800601 IM |
148 | { |
149 | int handled = 0; | |
150 | ||
151 | while (*argc > 0) { | |
152 | const char *cmd = (*argv)[0]; | |
153 | if (cmd[0] != '-') | |
154 | break; | |
155 | ||
156 | /* | |
157 | * For legacy reasons, the "version" and "help" | |
158 | * commands can be written with "--" prepended | |
159 | * to make them look like flags. | |
160 | */ | |
161 | if (!strcmp(cmd, "--help") || !strcmp(cmd, "--version")) | |
162 | break; | |
163 | ||
164 | /* | |
165 | * Check remaining flags. | |
166 | */ | |
cfed95a6 VL |
167 | if (!prefixcmp(cmd, CMD_EXEC_PATH)) { |
168 | cmd += strlen(CMD_EXEC_PATH); | |
07800601 IM |
169 | if (*cmd == '=') |
170 | perf_set_argv_exec_path(cmd + 1); | |
171 | else { | |
172 | puts(perf_exec_path()); | |
173 | exit(0); | |
174 | } | |
175 | } else if (!strcmp(cmd, "--html-path")) { | |
176 | puts(system_path(PERF_HTML_PATH)); | |
177 | exit(0); | |
178 | } else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) { | |
179 | use_pager = 1; | |
180 | } else if (!strcmp(cmd, "--no-pager")) { | |
181 | use_pager = 0; | |
182 | if (envchanged) | |
183 | *envchanged = 1; | |
184 | } else if (!strcmp(cmd, "--perf-dir")) { | |
185 | if (*argc < 2) { | |
4c574159 | 186 | fprintf(stderr, "No directory given for --perf-dir.\n"); |
07800601 IM |
187 | usage(perf_usage_string); |
188 | } | |
189 | setenv(PERF_DIR_ENVIRONMENT, (*argv)[1], 1); | |
190 | if (envchanged) | |
191 | *envchanged = 1; | |
192 | (*argv)++; | |
193 | (*argc)--; | |
194 | handled++; | |
cfed95a6 VL |
195 | } else if (!prefixcmp(cmd, CMD_PERF_DIR)) { |
196 | setenv(PERF_DIR_ENVIRONMENT, cmd + strlen(CMD_PERF_DIR), 1); | |
07800601 IM |
197 | if (envchanged) |
198 | *envchanged = 1; | |
199 | } else if (!strcmp(cmd, "--work-tree")) { | |
200 | if (*argc < 2) { | |
4c574159 | 201 | fprintf(stderr, "No directory given for --work-tree.\n"); |
07800601 IM |
202 | usage(perf_usage_string); |
203 | } | |
204 | setenv(PERF_WORK_TREE_ENVIRONMENT, (*argv)[1], 1); | |
205 | if (envchanged) | |
206 | *envchanged = 1; | |
207 | (*argv)++; | |
208 | (*argc)--; | |
cfed95a6 VL |
209 | } else if (!prefixcmp(cmd, CMD_WORK_TREE)) { |
210 | setenv(PERF_WORK_TREE_ENVIRONMENT, cmd + strlen(CMD_WORK_TREE), 1); | |
07800601 IM |
211 | if (envchanged) |
212 | *envchanged = 1; | |
5beeded1 JB |
213 | } else if (!strcmp(cmd, "--debugfs-dir")) { |
214 | if (*argc < 2) { | |
215 | fprintf(stderr, "No directory given for --debugfs-dir.\n"); | |
216 | usage(perf_usage_string); | |
217 | } | |
65d4b265 | 218 | tracing_path_set((*argv)[1]); |
5beeded1 JB |
219 | if (envchanged) |
220 | *envchanged = 1; | |
221 | (*argv)++; | |
222 | (*argc)--; | |
99ce8e9f JO |
223 | } else if (!strcmp(cmd, "--buildid-dir")) { |
224 | if (*argc < 2) { | |
225 | fprintf(stderr, "No directory given for --buildid-dir.\n"); | |
226 | usage(perf_usage_string); | |
227 | } | |
228 | set_buildid_dir((*argv)[1]); | |
229 | if (envchanged) | |
230 | *envchanged = 1; | |
231 | (*argv)++; | |
232 | (*argc)--; | |
cfed95a6 | 233 | } else if (!prefixcmp(cmd, CMD_DEBUGFS_DIR)) { |
65d4b265 | 234 | tracing_path_set(cmd + strlen(CMD_DEBUGFS_DIR)); |
9f30fffc | 235 | fprintf(stderr, "dir: %s\n", tracing_path); |
5beeded1 JB |
236 | if (envchanged) |
237 | *envchanged = 1; | |
98a4179c FW |
238 | } else if (!strcmp(cmd, "--list-cmds")) { |
239 | unsigned int i; | |
240 | ||
241 | for (i = 0; i < ARRAY_SIZE(commands); i++) { | |
242 | struct cmd_struct *p = commands+i; | |
243 | printf("%s ", p->cmd); | |
244 | } | |
ed457520 | 245 | putchar('\n'); |
98a4179c | 246 | exit(0); |
7335399a YS |
247 | } else if (!strcmp(cmd, "--list-opts")) { |
248 | unsigned int i; | |
249 | ||
250 | for (i = 0; i < ARRAY_SIZE(options)-1; i++) { | |
251 | struct option *p = options+i; | |
252 | printf("--%s ", p->long_name); | |
253 | } | |
254 | putchar('\n'); | |
255 | exit(0); | |
bbb2cea7 JO |
256 | } else if (!strcmp(cmd, "--debug")) { |
257 | if (*argc < 2) { | |
258 | fprintf(stderr, "No variable specified for --debug.\n"); | |
259 | usage(perf_usage_string); | |
260 | } | |
261 | if (perf_debug_option((*argv)[1])) | |
262 | usage(perf_usage_string); | |
263 | ||
264 | (*argv)++; | |
265 | (*argc)--; | |
07800601 IM |
266 | } else { |
267 | fprintf(stderr, "Unknown option: %s\n", cmd); | |
268 | usage(perf_usage_string); | |
269 | } | |
270 | ||
271 | (*argv)++; | |
272 | (*argc)--; | |
273 | handled++; | |
274 | } | |
275 | return handled; | |
276 | } | |
277 | ||
278 | static int handle_alias(int *argcp, const char ***argv) | |
279 | { | |
280 | int envchanged = 0, ret = 0, saved_errno = errno; | |
281 | int count, option_count; | |
4c574159 | 282 | const char **new_argv; |
07800601 IM |
283 | const char *alias_command; |
284 | char *alias_string; | |
07800601 IM |
285 | |
286 | alias_command = (*argv)[0]; | |
287 | alias_string = alias_lookup(alias_command); | |
288 | if (alias_string) { | |
289 | if (alias_string[0] == '!') { | |
290 | if (*argcp > 1) { | |
291 | struct strbuf buf; | |
292 | ||
293 | strbuf_init(&buf, PATH_MAX); | |
294 | strbuf_addstr(&buf, alias_string); | |
295 | sq_quote_argv(&buf, (*argv) + 1, PATH_MAX); | |
296 | free(alias_string); | |
297 | alias_string = buf.buf; | |
298 | } | |
299 | ret = system(alias_string + 1); | |
300 | if (ret >= 0 && WIFEXITED(ret) && | |
301 | WEXITSTATUS(ret) != 127) | |
302 | exit(WEXITSTATUS(ret)); | |
303 | die("Failed to run '%s' when expanding alias '%s'", | |
304 | alias_string + 1, alias_command); | |
305 | } | |
306 | count = split_cmdline(alias_string, &new_argv); | |
307 | if (count < 0) | |
308 | die("Bad alias.%s string", alias_command); | |
309 | option_count = handle_options(&new_argv, &count, &envchanged); | |
310 | if (envchanged) | |
311 | die("alias '%s' changes environment variables\n" | |
312 | "You can use '!perf' in the alias to do this.", | |
313 | alias_command); | |
314 | memmove(new_argv - option_count, new_argv, | |
315 | count * sizeof(char *)); | |
316 | new_argv -= option_count; | |
317 | ||
318 | if (count < 1) | |
319 | die("empty alias for %s", alias_command); | |
320 | ||
321 | if (!strcmp(alias_command, new_argv[0])) | |
322 | die("recursive alias: %s", alias_command); | |
323 | ||
4c574159 | 324 | new_argv = realloc(new_argv, sizeof(char *) * |
07800601 IM |
325 | (count + *argcp + 1)); |
326 | /* insert after command name */ | |
4c574159 TF |
327 | memcpy(new_argv + count, *argv + 1, sizeof(char *) * *argcp); |
328 | new_argv[count + *argcp] = NULL; | |
07800601 IM |
329 | |
330 | *argv = new_argv; | |
331 | *argcp += count - 1; | |
332 | ||
333 | ret = 1; | |
334 | } | |
335 | ||
336 | errno = saved_errno; | |
337 | ||
338 | return ret; | |
339 | } | |
340 | ||
341 | const char perf_version_string[] = PERF_VERSION; | |
342 | ||
343 | #define RUN_SETUP (1<<0) | |
344 | #define USE_PAGER (1<<1) | |
345 | /* | |
346 | * require working tree to be present -- anything uses this needs | |
347 | * RUN_SETUP for reading from the configuration file. | |
348 | */ | |
349 | #define NEED_WORK_TREE (1<<2) | |
350 | ||
07800601 IM |
351 | static int run_builtin(struct cmd_struct *p, int argc, const char **argv) |
352 | { | |
353 | int status; | |
354 | struct stat st; | |
355 | const char *prefix; | |
b2348e1d | 356 | char sbuf[STRERR_BUFSIZE]; |
07800601 IM |
357 | |
358 | prefix = NULL; | |
359 | if (p->option & RUN_SETUP) | |
360 | prefix = NULL; /* setup_perf_directory(); */ | |
361 | ||
5d06e691 | 362 | if (use_browser == -1) |
0020ce23 | 363 | use_browser = check_browser_config(p->cmd); |
5d06e691 | 364 | |
07800601 IM |
365 | if (use_pager == -1 && p->option & RUN_SETUP) |
366 | use_pager = check_pager_config(p->cmd); | |
367 | if (use_pager == -1 && p->option & USE_PAGER) | |
368 | use_pager = 1; | |
369 | commit_pager_choice(); | |
370 | ||
07800601 | 371 | status = p->fn(argc, argv, prefix); |
f3a1f0ea | 372 | exit_browser(status); |
aa36ddd7 | 373 | perf_env__exit(&perf_env); |
f3a1f0ea | 374 | |
07800601 IM |
375 | if (status) |
376 | return status & 0xff; | |
377 | ||
378 | /* Somebody closed stdout? */ | |
379 | if (fstat(fileno(stdout), &st)) | |
380 | return 0; | |
381 | /* Ignore write errors for pipes and sockets.. */ | |
382 | if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode)) | |
383 | return 0; | |
384 | ||
2a16bf8c | 385 | status = 1; |
07800601 | 386 | /* Check for ENOSPC and EIO errors.. */ |
2a16bf8c | 387 | if (fflush(stdout)) { |
b2348e1d MH |
388 | fprintf(stderr, "write failure on standard output: %s", |
389 | strerror_r(errno, sbuf, sizeof(sbuf))); | |
2a16bf8c ACM |
390 | goto out; |
391 | } | |
392 | if (ferror(stdout)) { | |
393 | fprintf(stderr, "unknown write failure on standard output"); | |
394 | goto out; | |
395 | } | |
396 | if (fclose(stdout)) { | |
b2348e1d MH |
397 | fprintf(stderr, "close failed on standard output: %s", |
398 | strerror_r(errno, sbuf, sizeof(sbuf))); | |
2a16bf8c ACM |
399 | goto out; |
400 | } | |
401 | status = 0; | |
402 | out: | |
403 | return status; | |
07800601 IM |
404 | } |
405 | ||
406 | static void handle_internal_command(int argc, const char **argv) | |
407 | { | |
408 | const char *cmd = argv[0]; | |
f37a291c | 409 | unsigned int i; |
07800601 IM |
410 | static const char ext[] = STRIP_EXTENSION; |
411 | ||
412 | if (sizeof(ext) > 1) { | |
413 | i = strlen(argv[0]) - strlen(ext); | |
414 | if (i > 0 && !strcmp(argv[0] + i, ext)) { | |
415 | char *argv0 = strdup(argv[0]); | |
416 | argv[0] = cmd = argv0; | |
417 | argv0[i] = '\0'; | |
418 | } | |
419 | } | |
420 | ||
421 | /* Turn "perf cmd --help" into "perf help cmd" */ | |
422 | if (argc > 1 && !strcmp(argv[1], "--help")) { | |
423 | argv[1] = argv[0]; | |
424 | argv[0] = cmd = "help"; | |
425 | } | |
426 | ||
427 | for (i = 0; i < ARRAY_SIZE(commands); i++) { | |
428 | struct cmd_struct *p = commands+i; | |
429 | if (strcmp(p->cmd, cmd)) | |
430 | continue; | |
431 | exit(run_builtin(p, argc, argv)); | |
432 | } | |
433 | } | |
434 | ||
435 | static void execv_dashed_external(const char **argv) | |
436 | { | |
437 | struct strbuf cmd = STRBUF_INIT; | |
438 | const char *tmp; | |
439 | int status; | |
440 | ||
441 | strbuf_addf(&cmd, "perf-%s", argv[0]); | |
442 | ||
443 | /* | |
444 | * argv[0] must be the perf command, but the argv array | |
445 | * belongs to the caller, and may be reused in | |
446 | * subsequent loop iterations. Save argv[0] and | |
447 | * restore it on error. | |
448 | */ | |
449 | tmp = argv[0]; | |
450 | argv[0] = cmd.buf; | |
451 | ||
452 | /* | |
453 | * if we fail because the command is not found, it is | |
454 | * OK to return. Otherwise, we just pass along the status code. | |
455 | */ | |
456 | status = run_command_v_opt(argv, 0); | |
457 | if (status != -ERR_RUN_COMMAND_EXEC) { | |
458 | if (IS_RUN_COMMAND_ERR(status)) | |
459 | die("unable to run '%s'", argv[0]); | |
460 | exit(-status); | |
461 | } | |
462 | errno = ENOENT; /* as if we called execvp */ | |
463 | ||
464 | argv[0] = tmp; | |
465 | ||
466 | strbuf_release(&cmd); | |
467 | } | |
468 | ||
469 | static int run_argv(int *argcp, const char ***argv) | |
470 | { | |
471 | int done_alias = 0; | |
472 | ||
473 | while (1) { | |
474 | /* See if it's an internal command */ | |
475 | handle_internal_command(*argcp, *argv); | |
476 | ||
477 | /* .. then try the external ones */ | |
478 | execv_dashed_external(*argv); | |
479 | ||
480 | /* It could be an alias -- this works around the insanity | |
481 | * of overriding "perf log" with "perf show" by having | |
482 | * alias.log = show | |
483 | */ | |
484 | if (done_alias || !handle_alias(argcp, argv)) | |
485 | break; | |
486 | done_alias = 1; | |
487 | } | |
488 | ||
489 | return done_alias; | |
490 | } | |
491 | ||
3af6e338 ACM |
492 | static void pthread__block_sigwinch(void) |
493 | { | |
494 | sigset_t set; | |
495 | ||
496 | sigemptyset(&set); | |
497 | sigaddset(&set, SIGWINCH); | |
498 | pthread_sigmask(SIG_BLOCK, &set, NULL); | |
499 | } | |
500 | ||
501 | void pthread__unblock_sigwinch(void) | |
502 | { | |
503 | sigset_t set; | |
504 | ||
505 | sigemptyset(&set); | |
506 | sigaddset(&set, SIGWINCH); | |
507 | pthread_sigmask(SIG_UNBLOCK, &set, NULL); | |
508 | } | |
509 | ||
07800601 IM |
510 | int main(int argc, const char **argv) |
511 | { | |
512 | const char *cmd; | |
b2348e1d | 513 | char sbuf[STRERR_BUFSIZE]; |
07800601 | 514 | |
918512b4 | 515 | /* The page_size is placed in util object. */ |
0c1fe6b2 | 516 | page_size = sysconf(_SC_PAGE_SIZE); |
2b1b7100 | 517 | cacheline_size = sysconf(_SC_LEVEL1_DCACHE_LINESIZE); |
0c1fe6b2 | 518 | |
07800601 IM |
519 | cmd = perf_extract_argv0_path(argv[0]); |
520 | if (!cmd) | |
521 | cmd = "perf-help"; | |
65d4b265 JO |
522 | |
523 | /* get debugfs/tracefs mount point from /proc/mounts */ | |
524 | tracing_path_mount(); | |
525 | ||
07800601 IM |
526 | /* |
527 | * "perf-xxxx" is the same as "perf xxxx", but we obviously: | |
528 | * | |
529 | * - cannot take flags in between the "perf" and the "xxxx". | |
530 | * - cannot execute it externally (since it would just do | |
531 | * the same thing over again) | |
532 | * | |
533 | * So we just directly call the internal command handler, and | |
534 | * die if that one cannot handle it. | |
535 | */ | |
536 | if (!prefixcmp(cmd, "perf-")) { | |
266dfb0b | 537 | cmd += 5; |
07800601 IM |
538 | argv[0] = cmd; |
539 | handle_internal_command(argc, argv); | |
2a16bf8c ACM |
540 | fprintf(stderr, "cannot handle %s internally", cmd); |
541 | goto out; | |
07800601 | 542 | } |
b52bc234 | 543 | if (!prefixcmp(cmd, "trace")) { |
1b572622 | 544 | #ifdef HAVE_LIBAUDIT_SUPPORT |
99ce8e9f | 545 | set_buildid_dir(NULL); |
b52bc234 ACM |
546 | setup_path(); |
547 | argv[0] = "trace"; | |
548 | return cmd_trace(argc, argv, NULL); | |
1b572622 ACM |
549 | #else |
550 | fprintf(stderr, | |
551 | "trace command not available: missing audit-libs devel package at build time.\n"); | |
552 | goto out; | |
b52bc234 | 553 | #endif |
1b572622 | 554 | } |
07800601 IM |
555 | /* Look for flags.. */ |
556 | argv++; | |
557 | argc--; | |
558 | handle_options(&argv, &argc, NULL); | |
559 | commit_pager_choice(); | |
99ce8e9f | 560 | set_buildid_dir(NULL); |
45de34bb | 561 | |
07800601 IM |
562 | if (argc > 0) { |
563 | if (!prefixcmp(argv[0], "--")) | |
564 | argv[0] += 2; | |
565 | } else { | |
566 | /* The user didn't specify a command; give them help */ | |
502fc5c7 | 567 | printf("\n usage: %s\n\n", perf_usage_string); |
07800601 | 568 | list_common_cmds_help(); |
502fc5c7 | 569 | printf("\n %s\n\n", perf_more_info_string); |
2a16bf8c | 570 | goto out; |
07800601 IM |
571 | } |
572 | cmd = argv[0]; | |
573 | ||
52502bf2 JO |
574 | test_attr__init(); |
575 | ||
07800601 IM |
576 | /* |
577 | * We use PATH to find perf commands, but we prepend some higher | |
659431fc | 578 | * precedence paths: the "--exec-path" option, the PERF_EXEC_PATH |
07800601 IM |
579 | * environment, and the $(perfexecdir) from the Makefile at build |
580 | * time. | |
581 | */ | |
582 | setup_path(); | |
3af6e338 ACM |
583 | /* |
584 | * Block SIGWINCH notifications so that the thread that wants it can | |
585 | * unblock and get syscalls like select interrupted instead of waiting | |
586 | * forever while the signal goes to some other non interested thread. | |
587 | */ | |
588 | pthread__block_sigwinch(); | |
07800601 IM |
589 | |
590 | while (1) { | |
4c574159 | 591 | static int done_help; |
b5ded713 | 592 | int was_alias = run_argv(&argc, &argv); |
8035e428 | 593 | |
07800601 IM |
594 | if (errno != ENOENT) |
595 | break; | |
8035e428 | 596 | |
07800601 IM |
597 | if (was_alias) { |
598 | fprintf(stderr, "Expansion of alias '%s' failed; " | |
599 | "'%s' is not a perf-command\n", | |
600 | cmd, argv[0]); | |
2a16bf8c | 601 | goto out; |
07800601 IM |
602 | } |
603 | if (!done_help) { | |
604 | cmd = argv[0] = help_unknown_cmd(cmd); | |
605 | done_help = 1; | |
606 | } else | |
607 | break; | |
608 | } | |
609 | ||
610 | fprintf(stderr, "Failed to run command '%s': %s\n", | |
b2348e1d | 611 | cmd, strerror_r(errno, sbuf, sizeof(sbuf))); |
2a16bf8c | 612 | out: |
07800601 IM |
613 | return 1; |
614 | } |