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Commit | Line | Data |
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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" |
4b6ab94e | 12 | #include <subcmd/exec-cmd.h> |
41840d21 | 13 | #include "util/config.h" |
148be2c1 | 14 | #include "util/quote.h" |
4b6ab94e | 15 | #include <subcmd/run-command.h> |
5beeded1 | 16 | #include "util/parse-events.h" |
4b6ab94e | 17 | #include <subcmd/parse-options.h> |
84c86ca1 | 18 | #include "util/bpf-loader.h" |
bbb2cea7 | 19 | #include "util/debug.h" |
4cb93446 | 20 | #include <api/fs/fs.h> |
592d5a6b | 21 | #include <api/fs/tracing_path.h> |
27683dc5 | 22 | #include <pthread.h> |
14cbfbeb NK |
23 | #include <stdlib.h> |
24 | #include <time.h> | |
07800601 IM |
25 | |
26 | const char perf_usage_string[] = | |
78a1b503 | 27 | "perf [--version] [--help] [OPTIONS] COMMAND [ARGS]"; |
07800601 IM |
28 | |
29 | const char perf_more_info_string[] = | |
30 | "See 'perf help COMMAND' for more information on a specific command."; | |
31 | ||
5d06e691 | 32 | int use_browser = -1; |
07800601 | 33 | static int use_pager = -1; |
70cb4e96 | 34 | const char *input_name; |
5d06e691 | 35 | |
98a4179c FW |
36 | struct cmd_struct { |
37 | const char *cmd; | |
38 | int (*fn)(int, const char **, const char *); | |
39 | int option; | |
40 | }; | |
41 | ||
42 | static struct cmd_struct commands[] = { | |
43 | { "buildid-cache", cmd_buildid_cache, 0 }, | |
44 | { "buildid-list", cmd_buildid_list, 0 }, | |
30862f2c | 45 | { "config", cmd_config, 0 }, |
98a4179c FW |
46 | { "diff", cmd_diff, 0 }, |
47 | { "evlist", cmd_evlist, 0 }, | |
48 | { "help", cmd_help, 0 }, | |
49 | { "list", cmd_list, 0 }, | |
50 | { "record", cmd_record, 0 }, | |
51 | { "report", cmd_report, 0 }, | |
52 | { "bench", cmd_bench, 0 }, | |
53 | { "stat", cmd_stat, 0 }, | |
54 | { "timechart", cmd_timechart, 0 }, | |
55 | { "top", cmd_top, 0 }, | |
56 | { "annotate", cmd_annotate, 0 }, | |
57 | { "version", cmd_version, 0 }, | |
58 | { "script", cmd_script, 0 }, | |
59 | { "sched", cmd_sched, 0 }, | |
89fe808a | 60 | #ifdef HAVE_LIBELF_SUPPORT |
98a4179c | 61 | { "probe", cmd_probe, 0 }, |
393be2e3 | 62 | #endif |
98a4179c FW |
63 | { "kmem", cmd_kmem, 0 }, |
64 | { "lock", cmd_lock, 0 }, | |
65 | { "kvm", cmd_kvm, 0 }, | |
66 | { "test", cmd_test, 0 }, | |
89fe808a | 67 | #ifdef HAVE_LIBAUDIT_SUPPORT |
514f1c67 | 68 | { "trace", cmd_trace, 0 }, |
4d29089c | 69 | #endif |
98a4179c | 70 | { "inject", cmd_inject, 0 }, |
028f12ee | 71 | { "mem", cmd_mem, 0 }, |
2245bf14 | 72 | { "data", cmd_data, 0 }, |
98a4179c FW |
73 | }; |
74 | ||
07800601 IM |
75 | struct pager_config { |
76 | const char *cmd; | |
77 | int val; | |
78 | }; | |
79 | ||
80 | static int pager_command_config(const char *var, const char *value, void *data) | |
81 | { | |
82 | struct pager_config *c = data; | |
83 | if (!prefixcmp(var, "pager.") && !strcmp(var + 6, c->cmd)) | |
84 | c->val = perf_config_bool(var, value); | |
85 | return 0; | |
86 | } | |
87 | ||
88 | /* returns 0 for "no pager", 1 for "use pager", and -1 for "not specified" */ | |
89 | int check_pager_config(const char *cmd) | |
90 | { | |
91 | struct pager_config c; | |
92 | c.cmd = cmd; | |
93 | c.val = -1; | |
94 | perf_config(pager_command_config, &c); | |
95 | return c.val; | |
96 | } | |
97 | ||
0020ce23 | 98 | static int browser_command_config(const char *var, const char *value, void *data) |
5d06e691 ACM |
99 | { |
100 | struct pager_config *c = data; | |
101 | if (!prefixcmp(var, "tui.") && !strcmp(var + 4, c->cmd)) | |
102 | c->val = perf_config_bool(var, value); | |
0020ce23 NK |
103 | if (!prefixcmp(var, "gtk.") && !strcmp(var + 4, c->cmd)) |
104 | c->val = perf_config_bool(var, value) ? 2 : 0; | |
5d06e691 ACM |
105 | return 0; |
106 | } | |
107 | ||
0020ce23 NK |
108 | /* |
109 | * returns 0 for "no tui", 1 for "use tui", 2 for "use gtk", | |
110 | * and -1 for "not specified" | |
111 | */ | |
112 | static int check_browser_config(const char *cmd) | |
5d06e691 ACM |
113 | { |
114 | struct pager_config c; | |
115 | c.cmd = cmd; | |
116 | c.val = -1; | |
0020ce23 | 117 | perf_config(browser_command_config, &c); |
5d06e691 ACM |
118 | return c.val; |
119 | } | |
120 | ||
4c574159 TF |
121 | static void commit_pager_choice(void) |
122 | { | |
07800601 IM |
123 | switch (use_pager) { |
124 | case 0: | |
096d3558 | 125 | setenv(PERF_PAGER_ENVIRONMENT, "cat", 1); |
07800601 IM |
126 | break; |
127 | case 1: | |
128 | /* setup_pager(); */ | |
129 | break; | |
130 | default: | |
131 | break; | |
132 | } | |
133 | } | |
134 | ||
7335399a YS |
135 | struct option options[] = { |
136 | OPT_ARGUMENT("help", "help"), | |
137 | OPT_ARGUMENT("version", "version"), | |
138 | OPT_ARGUMENT("exec-path", "exec-path"), | |
139 | OPT_ARGUMENT("html-path", "html-path"), | |
140 | OPT_ARGUMENT("paginate", "paginate"), | |
141 | OPT_ARGUMENT("no-pager", "no-pager"), | |
7335399a YS |
142 | OPT_ARGUMENT("debugfs-dir", "debugfs-dir"), |
143 | OPT_ARGUMENT("buildid-dir", "buildid-dir"), | |
144 | OPT_ARGUMENT("list-cmds", "list-cmds"), | |
145 | OPT_ARGUMENT("list-opts", "list-opts"), | |
146 | OPT_ARGUMENT("debug", "debug"), | |
147 | OPT_END() | |
148 | }; | |
149 | ||
4c574159 | 150 | static int handle_options(const char ***argv, int *argc, int *envchanged) |
07800601 IM |
151 | { |
152 | int handled = 0; | |
153 | ||
154 | while (*argc > 0) { | |
155 | const char *cmd = (*argv)[0]; | |
156 | if (cmd[0] != '-') | |
157 | break; | |
158 | ||
159 | /* | |
160 | * For legacy reasons, the "version" and "help" | |
161 | * commands can be written with "--" prepended | |
162 | * to make them look like flags. | |
163 | */ | |
164 | if (!strcmp(cmd, "--help") || !strcmp(cmd, "--version")) | |
165 | break; | |
166 | ||
a1853e2c JO |
167 | /* |
168 | * Shortcut for '-h' and '-v' options to invoke help | |
169 | * and version command. | |
170 | */ | |
171 | if (!strcmp(cmd, "-h")) { | |
172 | (*argv)[0] = "--help"; | |
173 | break; | |
174 | } | |
175 | ||
176 | if (!strcmp(cmd, "-v")) { | |
177 | (*argv)[0] = "--version"; | |
178 | break; | |
179 | } | |
180 | ||
07800601 IM |
181 | /* |
182 | * Check remaining flags. | |
183 | */ | |
cfed95a6 VL |
184 | if (!prefixcmp(cmd, CMD_EXEC_PATH)) { |
185 | cmd += strlen(CMD_EXEC_PATH); | |
07800601 | 186 | if (*cmd == '=') |
46113a54 | 187 | set_argv_exec_path(cmd + 1); |
07800601 | 188 | else { |
46113a54 | 189 | puts(get_argv_exec_path()); |
07800601 IM |
190 | exit(0); |
191 | } | |
192 | } else if (!strcmp(cmd, "--html-path")) { | |
193 | puts(system_path(PERF_HTML_PATH)); | |
194 | exit(0); | |
195 | } else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) { | |
196 | use_pager = 1; | |
197 | } else if (!strcmp(cmd, "--no-pager")) { | |
198 | use_pager = 0; | |
199 | if (envchanged) | |
200 | *envchanged = 1; | |
5beeded1 JB |
201 | } else if (!strcmp(cmd, "--debugfs-dir")) { |
202 | if (*argc < 2) { | |
203 | fprintf(stderr, "No directory given for --debugfs-dir.\n"); | |
204 | usage(perf_usage_string); | |
205 | } | |
65d4b265 | 206 | tracing_path_set((*argv)[1]); |
5beeded1 JB |
207 | if (envchanged) |
208 | *envchanged = 1; | |
209 | (*argv)++; | |
210 | (*argc)--; | |
99ce8e9f JO |
211 | } else if (!strcmp(cmd, "--buildid-dir")) { |
212 | if (*argc < 2) { | |
213 | fprintf(stderr, "No directory given for --buildid-dir.\n"); | |
214 | usage(perf_usage_string); | |
215 | } | |
216 | set_buildid_dir((*argv)[1]); | |
217 | if (envchanged) | |
218 | *envchanged = 1; | |
219 | (*argv)++; | |
220 | (*argc)--; | |
cfed95a6 | 221 | } else if (!prefixcmp(cmd, CMD_DEBUGFS_DIR)) { |
65d4b265 | 222 | tracing_path_set(cmd + strlen(CMD_DEBUGFS_DIR)); |
9f30fffc | 223 | fprintf(stderr, "dir: %s\n", tracing_path); |
5beeded1 JB |
224 | if (envchanged) |
225 | *envchanged = 1; | |
98a4179c FW |
226 | } else if (!strcmp(cmd, "--list-cmds")) { |
227 | unsigned int i; | |
228 | ||
229 | for (i = 0; i < ARRAY_SIZE(commands); i++) { | |
230 | struct cmd_struct *p = commands+i; | |
231 | printf("%s ", p->cmd); | |
232 | } | |
ed457520 | 233 | putchar('\n'); |
98a4179c | 234 | exit(0); |
7335399a YS |
235 | } else if (!strcmp(cmd, "--list-opts")) { |
236 | unsigned int i; | |
237 | ||
238 | for (i = 0; i < ARRAY_SIZE(options)-1; i++) { | |
239 | struct option *p = options+i; | |
240 | printf("--%s ", p->long_name); | |
241 | } | |
242 | putchar('\n'); | |
243 | exit(0); | |
bbb2cea7 JO |
244 | } else if (!strcmp(cmd, "--debug")) { |
245 | if (*argc < 2) { | |
246 | fprintf(stderr, "No variable specified for --debug.\n"); | |
247 | usage(perf_usage_string); | |
248 | } | |
249 | if (perf_debug_option((*argv)[1])) | |
250 | usage(perf_usage_string); | |
251 | ||
252 | (*argv)++; | |
253 | (*argc)--; | |
07800601 IM |
254 | } else { |
255 | fprintf(stderr, "Unknown option: %s\n", cmd); | |
256 | usage(perf_usage_string); | |
257 | } | |
258 | ||
259 | (*argv)++; | |
260 | (*argc)--; | |
261 | handled++; | |
262 | } | |
263 | return handled; | |
264 | } | |
265 | ||
266 | static int handle_alias(int *argcp, const char ***argv) | |
267 | { | |
268 | int envchanged = 0, ret = 0, saved_errno = errno; | |
269 | int count, option_count; | |
4c574159 | 270 | const char **new_argv; |
07800601 IM |
271 | const char *alias_command; |
272 | char *alias_string; | |
07800601 IM |
273 | |
274 | alias_command = (*argv)[0]; | |
275 | alias_string = alias_lookup(alias_command); | |
276 | if (alias_string) { | |
277 | if (alias_string[0] == '!') { | |
278 | if (*argcp > 1) { | |
279 | struct strbuf buf; | |
280 | ||
70a6898f MH |
281 | if (strbuf_init(&buf, PATH_MAX) < 0 || |
282 | strbuf_addstr(&buf, alias_string) < 0 || | |
283 | sq_quote_argv(&buf, (*argv) + 1, | |
284 | PATH_MAX) < 0) | |
285 | die("Failed to allocate memory."); | |
07800601 IM |
286 | free(alias_string); |
287 | alias_string = buf.buf; | |
288 | } | |
289 | ret = system(alias_string + 1); | |
290 | if (ret >= 0 && WIFEXITED(ret) && | |
291 | WEXITSTATUS(ret) != 127) | |
292 | exit(WEXITSTATUS(ret)); | |
293 | die("Failed to run '%s' when expanding alias '%s'", | |
294 | alias_string + 1, alias_command); | |
295 | } | |
296 | count = split_cmdline(alias_string, &new_argv); | |
297 | if (count < 0) | |
298 | die("Bad alias.%s string", alias_command); | |
299 | option_count = handle_options(&new_argv, &count, &envchanged); | |
300 | if (envchanged) | |
301 | die("alias '%s' changes environment variables\n" | |
302 | "You can use '!perf' in the alias to do this.", | |
303 | alias_command); | |
304 | memmove(new_argv - option_count, new_argv, | |
305 | count * sizeof(char *)); | |
306 | new_argv -= option_count; | |
307 | ||
308 | if (count < 1) | |
309 | die("empty alias for %s", alias_command); | |
310 | ||
311 | if (!strcmp(alias_command, new_argv[0])) | |
312 | die("recursive alias: %s", alias_command); | |
313 | ||
4c574159 | 314 | new_argv = realloc(new_argv, sizeof(char *) * |
07800601 IM |
315 | (count + *argcp + 1)); |
316 | /* insert after command name */ | |
4c574159 TF |
317 | memcpy(new_argv + count, *argv + 1, sizeof(char *) * *argcp); |
318 | new_argv[count + *argcp] = NULL; | |
07800601 IM |
319 | |
320 | *argv = new_argv; | |
321 | *argcp += count - 1; | |
322 | ||
323 | ret = 1; | |
324 | } | |
325 | ||
326 | errno = saved_errno; | |
327 | ||
328 | return ret; | |
329 | } | |
330 | ||
331 | const char perf_version_string[] = PERF_VERSION; | |
332 | ||
333 | #define RUN_SETUP (1<<0) | |
334 | #define USE_PAGER (1<<1) | |
07800601 | 335 | |
07800601 IM |
336 | static int run_builtin(struct cmd_struct *p, int argc, const char **argv) |
337 | { | |
338 | int status; | |
339 | struct stat st; | |
340 | const char *prefix; | |
b2348e1d | 341 | char sbuf[STRERR_BUFSIZE]; |
07800601 IM |
342 | |
343 | prefix = NULL; | |
344 | if (p->option & RUN_SETUP) | |
345 | prefix = NULL; /* setup_perf_directory(); */ | |
346 | ||
5d06e691 | 347 | if (use_browser == -1) |
0020ce23 | 348 | use_browser = check_browser_config(p->cmd); |
5d06e691 | 349 | |
07800601 IM |
350 | if (use_pager == -1 && p->option & RUN_SETUP) |
351 | use_pager = check_pager_config(p->cmd); | |
352 | if (use_pager == -1 && p->option & USE_PAGER) | |
353 | use_pager = 1; | |
354 | commit_pager_choice(); | |
355 | ||
2bdb2c27 | 356 | perf_env__set_cmdline(&perf_env, argc, argv); |
07800601 | 357 | status = p->fn(argc, argv, prefix); |
8a0a9c7e | 358 | perf_config__exit(); |
f3a1f0ea | 359 | exit_browser(status); |
aa36ddd7 | 360 | perf_env__exit(&perf_env); |
84c86ca1 | 361 | bpf__clear(); |
f3a1f0ea | 362 | |
07800601 IM |
363 | if (status) |
364 | return status & 0xff; | |
365 | ||
366 | /* Somebody closed stdout? */ | |
367 | if (fstat(fileno(stdout), &st)) | |
368 | return 0; | |
369 | /* Ignore write errors for pipes and sockets.. */ | |
370 | if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode)) | |
371 | return 0; | |
372 | ||
2a16bf8c | 373 | status = 1; |
07800601 | 374 | /* Check for ENOSPC and EIO errors.. */ |
2a16bf8c | 375 | if (fflush(stdout)) { |
b2348e1d | 376 | fprintf(stderr, "write failure on standard output: %s", |
c8b5f2c9 | 377 | str_error_r(errno, sbuf, sizeof(sbuf))); |
2a16bf8c ACM |
378 | goto out; |
379 | } | |
380 | if (ferror(stdout)) { | |
381 | fprintf(stderr, "unknown write failure on standard output"); | |
382 | goto out; | |
383 | } | |
384 | if (fclose(stdout)) { | |
b2348e1d | 385 | fprintf(stderr, "close failed on standard output: %s", |
c8b5f2c9 | 386 | str_error_r(errno, sbuf, sizeof(sbuf))); |
2a16bf8c ACM |
387 | goto out; |
388 | } | |
389 | status = 0; | |
390 | out: | |
391 | return status; | |
07800601 IM |
392 | } |
393 | ||
394 | static void handle_internal_command(int argc, const char **argv) | |
395 | { | |
396 | const char *cmd = argv[0]; | |
f37a291c | 397 | unsigned int i; |
07800601 IM |
398 | static const char ext[] = STRIP_EXTENSION; |
399 | ||
400 | if (sizeof(ext) > 1) { | |
401 | i = strlen(argv[0]) - strlen(ext); | |
402 | if (i > 0 && !strcmp(argv[0] + i, ext)) { | |
403 | char *argv0 = strdup(argv[0]); | |
404 | argv[0] = cmd = argv0; | |
405 | argv0[i] = '\0'; | |
406 | } | |
407 | } | |
408 | ||
409 | /* Turn "perf cmd --help" into "perf help cmd" */ | |
410 | if (argc > 1 && !strcmp(argv[1], "--help")) { | |
411 | argv[1] = argv[0]; | |
412 | argv[0] = cmd = "help"; | |
413 | } | |
414 | ||
415 | for (i = 0; i < ARRAY_SIZE(commands); i++) { | |
416 | struct cmd_struct *p = commands+i; | |
417 | if (strcmp(p->cmd, cmd)) | |
418 | continue; | |
419 | exit(run_builtin(p, argc, argv)); | |
420 | } | |
421 | } | |
422 | ||
423 | static void execv_dashed_external(const char **argv) | |
424 | { | |
5104ffb2 | 425 | char *cmd; |
07800601 IM |
426 | const char *tmp; |
427 | int status; | |
428 | ||
5104ffb2 ACM |
429 | if (asprintf(&cmd, "perf-%s", argv[0]) < 0) |
430 | goto do_die; | |
07800601 IM |
431 | |
432 | /* | |
433 | * argv[0] must be the perf command, but the argv array | |
434 | * belongs to the caller, and may be reused in | |
435 | * subsequent loop iterations. Save argv[0] and | |
436 | * restore it on error. | |
437 | */ | |
438 | tmp = argv[0]; | |
5104ffb2 | 439 | argv[0] = cmd; |
07800601 IM |
440 | |
441 | /* | |
442 | * if we fail because the command is not found, it is | |
443 | * OK to return. Otherwise, we just pass along the status code. | |
444 | */ | |
445 | status = run_command_v_opt(argv, 0); | |
446 | if (status != -ERR_RUN_COMMAND_EXEC) { | |
5104ffb2 ACM |
447 | if (IS_RUN_COMMAND_ERR(status)) { |
448 | do_die: | |
07800601 | 449 | die("unable to run '%s'", argv[0]); |
5104ffb2 | 450 | } |
07800601 IM |
451 | exit(-status); |
452 | } | |
453 | errno = ENOENT; /* as if we called execvp */ | |
454 | ||
455 | argv[0] = tmp; | |
5104ffb2 | 456 | zfree(&cmd); |
07800601 IM |
457 | } |
458 | ||
459 | static int run_argv(int *argcp, const char ***argv) | |
460 | { | |
461 | int done_alias = 0; | |
462 | ||
463 | while (1) { | |
464 | /* See if it's an internal command */ | |
465 | handle_internal_command(*argcp, *argv); | |
466 | ||
467 | /* .. then try the external ones */ | |
468 | execv_dashed_external(*argv); | |
469 | ||
470 | /* It could be an alias -- this works around the insanity | |
471 | * of overriding "perf log" with "perf show" by having | |
472 | * alias.log = show | |
473 | */ | |
474 | if (done_alias || !handle_alias(argcp, argv)) | |
475 | break; | |
476 | done_alias = 1; | |
477 | } | |
478 | ||
479 | return done_alias; | |
480 | } | |
481 | ||
3af6e338 ACM |
482 | static void pthread__block_sigwinch(void) |
483 | { | |
484 | sigset_t set; | |
485 | ||
486 | sigemptyset(&set); | |
487 | sigaddset(&set, SIGWINCH); | |
488 | pthread_sigmask(SIG_BLOCK, &set, NULL); | |
489 | } | |
490 | ||
491 | void pthread__unblock_sigwinch(void) | |
492 | { | |
493 | sigset_t set; | |
494 | ||
495 | sigemptyset(&set); | |
496 | sigaddset(&set, SIGWINCH); | |
497 | pthread_sigmask(SIG_UNBLOCK, &set, NULL); | |
498 | } | |
499 | ||
9a3dc28b ACM |
500 | #ifdef _SC_LEVEL1_DCACHE_LINESIZE |
501 | #define cache_line_size(cacheline_sizep) *cacheline_sizep = sysconf(_SC_LEVEL1_DCACHE_LINESIZE) | |
502 | #else | |
503 | static void cache_line_size(int *cacheline_sizep) | |
504 | { | |
505 | if (sysfs__read_int("devices/system/cpu/cpu0/cache/index0/coherency_line_size", cacheline_sizep)) | |
8811e8ea | 506 | pr_debug("cannot determine cache line size"); |
9a3dc28b ACM |
507 | } |
508 | #endif | |
509 | ||
07800601 IM |
510 | int main(int argc, const char **argv) |
511 | { | |
512 | const char *cmd; | |
b2348e1d | 513 | char sbuf[STRERR_BUFSIZE]; |
4cb93446 | 514 | int value; |
07800601 | 515 | |
096d3558 JP |
516 | /* libsubcmd init */ |
517 | exec_cmd_init("perf", PREFIX, PERF_EXEC_PATH, EXEC_PATH_ENVIRONMENT); | |
518 | pager_init(PERF_PAGER_ENVIRONMENT); | |
519 | ||
918512b4 | 520 | /* The page_size is placed in util object. */ |
0c1fe6b2 | 521 | page_size = sysconf(_SC_PAGE_SIZE); |
9a3dc28b | 522 | cache_line_size(&cacheline_size); |
0c1fe6b2 | 523 | |
4cb93446 ACM |
524 | if (sysctl__read_int("kernel/perf_event_max_stack", &value) == 0) |
525 | sysctl_perf_event_max_stack = value; | |
526 | ||
a29d5c9b ACM |
527 | if (sysctl__read_int("kernel/perf_event_max_contexts_per_stack", &value) == 0) |
528 | sysctl_perf_event_max_contexts_per_stack = value; | |
529 | ||
46113a54 | 530 | cmd = extract_argv0_path(argv[0]); |
07800601 IM |
531 | if (!cmd) |
532 | cmd = "perf-help"; | |
65d4b265 | 533 | |
14cbfbeb NK |
534 | srandom(time(NULL)); |
535 | ||
8a0a9c7e | 536 | perf_config__init(); |
b8cbb349 | 537 | perf_config(perf_default_config, NULL); |
58cb9d65 | 538 | set_buildid_dir(NULL); |
b8cbb349 | 539 | |
65d4b265 JO |
540 | /* get debugfs/tracefs mount point from /proc/mounts */ |
541 | tracing_path_mount(); | |
542 | ||
07800601 IM |
543 | /* |
544 | * "perf-xxxx" is the same as "perf xxxx", but we obviously: | |
545 | * | |
546 | * - cannot take flags in between the "perf" and the "xxxx". | |
547 | * - cannot execute it externally (since it would just do | |
548 | * the same thing over again) | |
549 | * | |
550 | * So we just directly call the internal command handler, and | |
551 | * die if that one cannot handle it. | |
552 | */ | |
553 | if (!prefixcmp(cmd, "perf-")) { | |
266dfb0b | 554 | cmd += 5; |
07800601 IM |
555 | argv[0] = cmd; |
556 | handle_internal_command(argc, argv); | |
2a16bf8c ACM |
557 | fprintf(stderr, "cannot handle %s internally", cmd); |
558 | goto out; | |
07800601 | 559 | } |
b52bc234 | 560 | if (!prefixcmp(cmd, "trace")) { |
1b572622 | 561 | #ifdef HAVE_LIBAUDIT_SUPPORT |
b52bc234 ACM |
562 | setup_path(); |
563 | argv[0] = "trace"; | |
564 | return cmd_trace(argc, argv, NULL); | |
1b572622 ACM |
565 | #else |
566 | fprintf(stderr, | |
567 | "trace command not available: missing audit-libs devel package at build time.\n"); | |
568 | goto out; | |
b52bc234 | 569 | #endif |
1b572622 | 570 | } |
07800601 IM |
571 | /* Look for flags.. */ |
572 | argv++; | |
573 | argc--; | |
574 | handle_options(&argv, &argc, NULL); | |
575 | commit_pager_choice(); | |
45de34bb | 576 | |
07800601 IM |
577 | if (argc > 0) { |
578 | if (!prefixcmp(argv[0], "--")) | |
579 | argv[0] += 2; | |
580 | } else { | |
581 | /* The user didn't specify a command; give them help */ | |
502fc5c7 | 582 | printf("\n usage: %s\n\n", perf_usage_string); |
07800601 | 583 | list_common_cmds_help(); |
502fc5c7 | 584 | printf("\n %s\n\n", perf_more_info_string); |
2a16bf8c | 585 | goto out; |
07800601 IM |
586 | } |
587 | cmd = argv[0]; | |
588 | ||
52502bf2 JO |
589 | test_attr__init(); |
590 | ||
07800601 IM |
591 | /* |
592 | * We use PATH to find perf commands, but we prepend some higher | |
659431fc | 593 | * precedence paths: the "--exec-path" option, the PERF_EXEC_PATH |
07800601 IM |
594 | * environment, and the $(perfexecdir) from the Makefile at build |
595 | * time. | |
596 | */ | |
597 | setup_path(); | |
3af6e338 ACM |
598 | /* |
599 | * Block SIGWINCH notifications so that the thread that wants it can | |
600 | * unblock and get syscalls like select interrupted instead of waiting | |
601 | * forever while the signal goes to some other non interested thread. | |
602 | */ | |
603 | pthread__block_sigwinch(); | |
07800601 | 604 | |
dd629cc0 JO |
605 | perf_debug_setup(); |
606 | ||
07800601 | 607 | while (1) { |
4c574159 | 608 | static int done_help; |
b5ded713 | 609 | int was_alias = run_argv(&argc, &argv); |
8035e428 | 610 | |
07800601 IM |
611 | if (errno != ENOENT) |
612 | break; | |
8035e428 | 613 | |
07800601 IM |
614 | if (was_alias) { |
615 | fprintf(stderr, "Expansion of alias '%s' failed; " | |
616 | "'%s' is not a perf-command\n", | |
617 | cmd, argv[0]); | |
2a16bf8c | 618 | goto out; |
07800601 IM |
619 | } |
620 | if (!done_help) { | |
621 | cmd = argv[0] = help_unknown_cmd(cmd); | |
622 | done_help = 1; | |
623 | } else | |
624 | break; | |
625 | } | |
626 | ||
627 | fprintf(stderr, "Failed to run command '%s': %s\n", | |
c8b5f2c9 | 628 | cmd, str_error_r(errno, sbuf, sizeof(sbuf))); |
2a16bf8c | 629 | out: |
07800601 IM |
630 | return 1; |
631 | } |