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" |
c1a604df | 10 | #include "perf.h" |
bf9e1876 | 11 | |
4cb3c6d5 | 12 | #include "util/build-id.h" |
8520a98d | 13 | #include "util/cache.h" |
aa36ddd7 | 14 | #include "util/env.h" |
20f2be1d | 15 | #include <internal/lib.h> // page_size |
4b6ab94e | 16 | #include <subcmd/exec-cmd.h> |
41840d21 | 17 | #include "util/config.h" |
4b6ab94e | 18 | #include <subcmd/run-command.h> |
5beeded1 | 19 | #include "util/parse-events.h" |
4b6ab94e | 20 | #include <subcmd/parse-options.h> |
84c86ca1 | 21 | #include "util/bpf-loader.h" |
bbb2cea7 | 22 | #include "util/debug.h" |
5ab8c689 | 23 | #include "util/event.h" |
20f2be1d | 24 | #include "util/util.h" // usage() |
fa0d9846 | 25 | #include "ui/ui.h" |
91854f9a | 26 | #include "perf-sys.h" |
4cb93446 | 27 | #include <api/fs/fs.h> |
592d5a6b | 28 | #include <api/fs/tracing_path.h> |
20f2be1d | 29 | #include <perf/core.h> |
a43783ae | 30 | #include <errno.h> |
27683dc5 | 31 | #include <pthread.h> |
9607ad3a | 32 | #include <signal.h> |
14cbfbeb NK |
33 | #include <stdlib.h> |
34 | #include <time.h> | |
7a8ef4c4 ACM |
35 | #include <sys/types.h> |
36 | #include <sys/stat.h> | |
37 | #include <unistd.h> | |
877a7a11 | 38 | #include <linux/kernel.h> |
8520a98d | 39 | #include <linux/string.h> |
7f7c536f | 40 | #include <linux/zalloc.h> |
07800601 IM |
41 | |
42 | const char perf_usage_string[] = | |
78a1b503 | 43 | "perf [--version] [--help] [OPTIONS] COMMAND [ARGS]"; |
07800601 IM |
44 | |
45 | const char perf_more_info_string[] = | |
46 | "See 'perf help COMMAND' for more information on a specific command."; | |
47 | ||
48 | static int use_pager = -1; | |
70cb4e96 | 49 | const char *input_name; |
5d06e691 | 50 | |
98a4179c FW |
51 | struct cmd_struct { |
52 | const char *cmd; | |
b0ad8ea6 | 53 | int (*fn)(int, const char **); |
98a4179c FW |
54 | int option; |
55 | }; | |
56 | ||
57 | static struct cmd_struct commands[] = { | |
58 | { "buildid-cache", cmd_buildid_cache, 0 }, | |
59 | { "buildid-list", cmd_buildid_list, 0 }, | |
30862f2c | 60 | { "config", cmd_config, 0 }, |
7aef3bf3 | 61 | { "c2c", cmd_c2c, 0 }, |
98a4179c FW |
62 | { "diff", cmd_diff, 0 }, |
63 | { "evlist", cmd_evlist, 0 }, | |
64 | { "help", cmd_help, 0 }, | |
35563771 | 65 | { "kallsyms", cmd_kallsyms, 0 }, |
98a4179c FW |
66 | { "list", cmd_list, 0 }, |
67 | { "record", cmd_record, 0 }, | |
68 | { "report", cmd_report, 0 }, | |
69 | { "bench", cmd_bench, 0 }, | |
70 | { "stat", cmd_stat, 0 }, | |
71 | { "timechart", cmd_timechart, 0 }, | |
72 | { "top", cmd_top, 0 }, | |
73 | { "annotate", cmd_annotate, 0 }, | |
74 | { "version", cmd_version, 0 }, | |
75 | { "script", cmd_script, 0 }, | |
76 | { "sched", cmd_sched, 0 }, | |
89fe808a | 77 | #ifdef HAVE_LIBELF_SUPPORT |
98a4179c | 78 | { "probe", cmd_probe, 0 }, |
393be2e3 | 79 | #endif |
98a4179c FW |
80 | { "kmem", cmd_kmem, 0 }, |
81 | { "lock", cmd_lock, 0 }, | |
82 | { "kvm", cmd_kvm, 0 }, | |
83 | { "test", cmd_test, 0 }, | |
22e9af4e | 84 | #if defined(HAVE_LIBAUDIT_SUPPORT) || defined(HAVE_SYSCALL_TABLE_SUPPORT) |
514f1c67 | 85 | { "trace", cmd_trace, 0 }, |
4d29089c | 86 | #endif |
98a4179c | 87 | { "inject", cmd_inject, 0 }, |
028f12ee | 88 | { "mem", cmd_mem, 0 }, |
2245bf14 | 89 | { "data", cmd_data, 0 }, |
d01f4e8d | 90 | { "ftrace", cmd_ftrace, 0 }, |
d450bc50 | 91 | { "daemon", cmd_daemon, 0 }, |
98a4179c FW |
92 | }; |
93 | ||
07800601 IM |
94 | struct pager_config { |
95 | const char *cmd; | |
96 | int val; | |
97 | }; | |
98 | ||
99 | static int pager_command_config(const char *var, const char *value, void *data) | |
100 | { | |
101 | struct pager_config *c = data; | |
8e99b6d4 | 102 | if (strstarts(var, "pager.") && !strcmp(var + 6, c->cmd)) |
07800601 IM |
103 | c->val = perf_config_bool(var, value); |
104 | return 0; | |
105 | } | |
106 | ||
107 | /* returns 0 for "no pager", 1 for "use pager", and -1 for "not specified" */ | |
a3b70b3b | 108 | static int check_pager_config(const char *cmd) |
07800601 | 109 | { |
ecc4c561 | 110 | int err; |
07800601 IM |
111 | struct pager_config c; |
112 | c.cmd = cmd; | |
113 | c.val = -1; | |
ecc4c561 ACM |
114 | err = perf_config(pager_command_config, &c); |
115 | return err ?: c.val; | |
07800601 IM |
116 | } |
117 | ||
0020ce23 | 118 | static int browser_command_config(const char *var, const char *value, void *data) |
5d06e691 ACM |
119 | { |
120 | struct pager_config *c = data; | |
8e99b6d4 | 121 | if (strstarts(var, "tui.") && !strcmp(var + 4, c->cmd)) |
5d06e691 | 122 | c->val = perf_config_bool(var, value); |
8e99b6d4 | 123 | if (strstarts(var, "gtk.") && !strcmp(var + 4, c->cmd)) |
0020ce23 | 124 | c->val = perf_config_bool(var, value) ? 2 : 0; |
5d06e691 ACM |
125 | return 0; |
126 | } | |
127 | ||
0020ce23 NK |
128 | /* |
129 | * returns 0 for "no tui", 1 for "use tui", 2 for "use gtk", | |
130 | * and -1 for "not specified" | |
131 | */ | |
132 | static int check_browser_config(const char *cmd) | |
5d06e691 | 133 | { |
ecc4c561 | 134 | int err; |
5d06e691 ACM |
135 | struct pager_config c; |
136 | c.cmd = cmd; | |
137 | c.val = -1; | |
ecc4c561 ACM |
138 | err = perf_config(browser_command_config, &c); |
139 | return err ?: c.val; | |
5d06e691 ACM |
140 | } |
141 | ||
4c574159 TF |
142 | static void commit_pager_choice(void) |
143 | { | |
07800601 IM |
144 | switch (use_pager) { |
145 | case 0: | |
096d3558 | 146 | setenv(PERF_PAGER_ENVIRONMENT, "cat", 1); |
07800601 IM |
147 | break; |
148 | case 1: | |
149 | /* setup_pager(); */ | |
150 | break; | |
151 | default: | |
152 | break; | |
153 | } | |
154 | } | |
155 | ||
7335399a YS |
156 | struct option options[] = { |
157 | OPT_ARGUMENT("help", "help"), | |
158 | OPT_ARGUMENT("version", "version"), | |
159 | OPT_ARGUMENT("exec-path", "exec-path"), | |
160 | OPT_ARGUMENT("html-path", "html-path"), | |
161 | OPT_ARGUMENT("paginate", "paginate"), | |
162 | OPT_ARGUMENT("no-pager", "no-pager"), | |
7335399a YS |
163 | OPT_ARGUMENT("debugfs-dir", "debugfs-dir"), |
164 | OPT_ARGUMENT("buildid-dir", "buildid-dir"), | |
165 | OPT_ARGUMENT("list-cmds", "list-cmds"), | |
166 | OPT_ARGUMENT("list-opts", "list-opts"), | |
167 | OPT_ARGUMENT("debug", "debug"), | |
168 | OPT_END() | |
169 | }; | |
170 | ||
4c574159 | 171 | static int handle_options(const char ***argv, int *argc, int *envchanged) |
07800601 IM |
172 | { |
173 | int handled = 0; | |
174 | ||
175 | while (*argc > 0) { | |
176 | const char *cmd = (*argv)[0]; | |
177 | if (cmd[0] != '-') | |
178 | break; | |
179 | ||
180 | /* | |
181 | * For legacy reasons, the "version" and "help" | |
182 | * commands can be written with "--" prepended | |
183 | * to make them look like flags. | |
184 | */ | |
185 | if (!strcmp(cmd, "--help") || !strcmp(cmd, "--version")) | |
186 | break; | |
187 | ||
a1853e2c JO |
188 | /* |
189 | * Shortcut for '-h' and '-v' options to invoke help | |
190 | * and version command. | |
191 | */ | |
192 | if (!strcmp(cmd, "-h")) { | |
193 | (*argv)[0] = "--help"; | |
194 | break; | |
195 | } | |
196 | ||
197 | if (!strcmp(cmd, "-v")) { | |
198 | (*argv)[0] = "--version"; | |
199 | break; | |
200 | } | |
201 | ||
3aa94b10 JY |
202 | if (!strcmp(cmd, "-vv")) { |
203 | (*argv)[0] = "version"; | |
204 | version_verbose = 1; | |
205 | break; | |
206 | } | |
207 | ||
07800601 IM |
208 | /* |
209 | * Check remaining flags. | |
210 | */ | |
8e99b6d4 | 211 | if (strstarts(cmd, CMD_EXEC_PATH)) { |
cfed95a6 | 212 | cmd += strlen(CMD_EXEC_PATH); |
07800601 | 213 | if (*cmd == '=') |
46113a54 | 214 | set_argv_exec_path(cmd + 1); |
07800601 | 215 | else { |
46113a54 | 216 | puts(get_argv_exec_path()); |
07800601 IM |
217 | exit(0); |
218 | } | |
219 | } else if (!strcmp(cmd, "--html-path")) { | |
220 | puts(system_path(PERF_HTML_PATH)); | |
221 | exit(0); | |
222 | } else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) { | |
223 | use_pager = 1; | |
224 | } else if (!strcmp(cmd, "--no-pager")) { | |
225 | use_pager = 0; | |
226 | if (envchanged) | |
227 | *envchanged = 1; | |
5beeded1 JB |
228 | } else if (!strcmp(cmd, "--debugfs-dir")) { |
229 | if (*argc < 2) { | |
230 | fprintf(stderr, "No directory given for --debugfs-dir.\n"); | |
231 | usage(perf_usage_string); | |
232 | } | |
65d4b265 | 233 | tracing_path_set((*argv)[1]); |
5beeded1 JB |
234 | if (envchanged) |
235 | *envchanged = 1; | |
236 | (*argv)++; | |
237 | (*argc)--; | |
99ce8e9f JO |
238 | } else if (!strcmp(cmd, "--buildid-dir")) { |
239 | if (*argc < 2) { | |
240 | fprintf(stderr, "No directory given for --buildid-dir.\n"); | |
241 | usage(perf_usage_string); | |
242 | } | |
243 | set_buildid_dir((*argv)[1]); | |
244 | if (envchanged) | |
245 | *envchanged = 1; | |
246 | (*argv)++; | |
247 | (*argc)--; | |
8e99b6d4 | 248 | } else if (strstarts(cmd, CMD_DEBUGFS_DIR)) { |
65d4b265 | 249 | tracing_path_set(cmd + strlen(CMD_DEBUGFS_DIR)); |
17c257e8 | 250 | fprintf(stderr, "dir: %s\n", tracing_path_mount()); |
5beeded1 JB |
251 | if (envchanged) |
252 | *envchanged = 1; | |
98a4179c FW |
253 | } else if (!strcmp(cmd, "--list-cmds")) { |
254 | unsigned int i; | |
255 | ||
256 | for (i = 0; i < ARRAY_SIZE(commands); i++) { | |
257 | struct cmd_struct *p = commands+i; | |
258 | printf("%s ", p->cmd); | |
259 | } | |
ed457520 | 260 | putchar('\n'); |
98a4179c | 261 | exit(0); |
7335399a YS |
262 | } else if (!strcmp(cmd, "--list-opts")) { |
263 | unsigned int i; | |
264 | ||
265 | for (i = 0; i < ARRAY_SIZE(options)-1; i++) { | |
266 | struct option *p = options+i; | |
267 | printf("--%s ", p->long_name); | |
268 | } | |
269 | putchar('\n'); | |
270 | exit(0); | |
bbb2cea7 JO |
271 | } else if (!strcmp(cmd, "--debug")) { |
272 | if (*argc < 2) { | |
273 | fprintf(stderr, "No variable specified for --debug.\n"); | |
274 | usage(perf_usage_string); | |
275 | } | |
276 | if (perf_debug_option((*argv)[1])) | |
277 | usage(perf_usage_string); | |
278 | ||
279 | (*argv)++; | |
280 | (*argc)--; | |
07800601 IM |
281 | } else { |
282 | fprintf(stderr, "Unknown option: %s\n", cmd); | |
283 | usage(perf_usage_string); | |
284 | } | |
285 | ||
286 | (*argv)++; | |
287 | (*argc)--; | |
288 | handled++; | |
289 | } | |
290 | return handled; | |
291 | } | |
292 | ||
07800601 IM |
293 | #define RUN_SETUP (1<<0) |
294 | #define USE_PAGER (1<<1) | |
07800601 | 295 | |
07800601 IM |
296 | static int run_builtin(struct cmd_struct *p, int argc, const char **argv) |
297 | { | |
298 | int status; | |
299 | struct stat st; | |
b2348e1d | 300 | char sbuf[STRERR_BUFSIZE]; |
07800601 | 301 | |
5d06e691 | 302 | if (use_browser == -1) |
0020ce23 | 303 | use_browser = check_browser_config(p->cmd); |
5d06e691 | 304 | |
07800601 IM |
305 | if (use_pager == -1 && p->option & RUN_SETUP) |
306 | use_pager = check_pager_config(p->cmd); | |
307 | if (use_pager == -1 && p->option & USE_PAGER) | |
308 | use_pager = 1; | |
309 | commit_pager_choice(); | |
310 | ||
e4378f0c | 311 | perf_env__init(&perf_env); |
2bdb2c27 | 312 | perf_env__set_cmdline(&perf_env, argc, argv); |
b0ad8ea6 | 313 | status = p->fn(argc, argv); |
8a0a9c7e | 314 | perf_config__exit(); |
f3a1f0ea | 315 | exit_browser(status); |
aa36ddd7 | 316 | perf_env__exit(&perf_env); |
84c86ca1 | 317 | bpf__clear(); |
f3a1f0ea | 318 | |
07800601 IM |
319 | if (status) |
320 | return status & 0xff; | |
321 | ||
322 | /* Somebody closed stdout? */ | |
323 | if (fstat(fileno(stdout), &st)) | |
324 | return 0; | |
325 | /* Ignore write errors for pipes and sockets.. */ | |
326 | if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode)) | |
327 | return 0; | |
328 | ||
2a16bf8c | 329 | status = 1; |
07800601 | 330 | /* Check for ENOSPC and EIO errors.. */ |
2a16bf8c | 331 | if (fflush(stdout)) { |
b2348e1d | 332 | fprintf(stderr, "write failure on standard output: %s", |
c8b5f2c9 | 333 | str_error_r(errno, sbuf, sizeof(sbuf))); |
2a16bf8c ACM |
334 | goto out; |
335 | } | |
336 | if (ferror(stdout)) { | |
337 | fprintf(stderr, "unknown write failure on standard output"); | |
338 | goto out; | |
339 | } | |
340 | if (fclose(stdout)) { | |
b2348e1d | 341 | fprintf(stderr, "close failed on standard output: %s", |
c8b5f2c9 | 342 | str_error_r(errno, sbuf, sizeof(sbuf))); |
2a16bf8c ACM |
343 | goto out; |
344 | } | |
345 | status = 0; | |
346 | out: | |
347 | return status; | |
07800601 IM |
348 | } |
349 | ||
350 | static void handle_internal_command(int argc, const char **argv) | |
351 | { | |
352 | const char *cmd = argv[0]; | |
f37a291c | 353 | unsigned int i; |
07800601 IM |
354 | |
355 | /* Turn "perf cmd --help" into "perf help cmd" */ | |
356 | if (argc > 1 && !strcmp(argv[1], "--help")) { | |
357 | argv[1] = argv[0]; | |
358 | argv[0] = cmd = "help"; | |
359 | } | |
360 | ||
361 | for (i = 0; i < ARRAY_SIZE(commands); i++) { | |
362 | struct cmd_struct *p = commands+i; | |
363 | if (strcmp(p->cmd, cmd)) | |
364 | continue; | |
365 | exit(run_builtin(p, argc, argv)); | |
366 | } | |
367 | } | |
368 | ||
369 | static void execv_dashed_external(const char **argv) | |
370 | { | |
5104ffb2 | 371 | char *cmd; |
07800601 IM |
372 | const char *tmp; |
373 | int status; | |
374 | ||
5104ffb2 ACM |
375 | if (asprintf(&cmd, "perf-%s", argv[0]) < 0) |
376 | goto do_die; | |
07800601 IM |
377 | |
378 | /* | |
379 | * argv[0] must be the perf command, but the argv array | |
380 | * belongs to the caller, and may be reused in | |
381 | * subsequent loop iterations. Save argv[0] and | |
382 | * restore it on error. | |
383 | */ | |
384 | tmp = argv[0]; | |
5104ffb2 | 385 | argv[0] = cmd; |
07800601 IM |
386 | |
387 | /* | |
388 | * if we fail because the command is not found, it is | |
389 | * OK to return. Otherwise, we just pass along the status code. | |
390 | */ | |
391 | status = run_command_v_opt(argv, 0); | |
392 | if (status != -ERR_RUN_COMMAND_EXEC) { | |
5104ffb2 ACM |
393 | if (IS_RUN_COMMAND_ERR(status)) { |
394 | do_die: | |
42774806 ACM |
395 | pr_err("FATAL: unable to run '%s'", argv[0]); |
396 | status = -128; | |
5104ffb2 | 397 | } |
07800601 IM |
398 | exit(-status); |
399 | } | |
400 | errno = ENOENT; /* as if we called execvp */ | |
401 | ||
402 | argv[0] = tmp; | |
5104ffb2 | 403 | zfree(&cmd); |
07800601 IM |
404 | } |
405 | ||
406 | static int run_argv(int *argcp, const char ***argv) | |
407 | { | |
c6867701 ACM |
408 | /* See if it's an internal command */ |
409 | handle_internal_command(*argcp, *argv); | |
07800601 | 410 | |
c6867701 ACM |
411 | /* .. then try the external ones */ |
412 | execv_dashed_external(*argv); | |
413 | return 0; | |
07800601 IM |
414 | } |
415 | ||
3af6e338 ACM |
416 | static void pthread__block_sigwinch(void) |
417 | { | |
418 | sigset_t set; | |
419 | ||
420 | sigemptyset(&set); | |
421 | sigaddset(&set, SIGWINCH); | |
422 | pthread_sigmask(SIG_BLOCK, &set, NULL); | |
423 | } | |
424 | ||
425 | void pthread__unblock_sigwinch(void) | |
426 | { | |
427 | sigset_t set; | |
428 | ||
429 | sigemptyset(&set); | |
430 | sigaddset(&set, SIGWINCH); | |
431 | pthread_sigmask(SIG_UNBLOCK, &set, NULL); | |
432 | } | |
433 | ||
428dab81 JO |
434 | static int libperf_print(enum libperf_print_level level, |
435 | const char *fmt, va_list ap) | |
436 | { | |
437 | return eprintf(level, verbose, fmt, ap); | |
438 | } | |
439 | ||
07800601 IM |
440 | int main(int argc, const char **argv) |
441 | { | |
ecc4c561 | 442 | int err; |
07800601 | 443 | const char *cmd; |
b2348e1d | 444 | char sbuf[STRERR_BUFSIZE]; |
07800601 | 445 | |
c59870e2 IR |
446 | perf_debug_setup(); |
447 | ||
096d3558 JP |
448 | /* libsubcmd init */ |
449 | exec_cmd_init("perf", PREFIX, PERF_EXEC_PATH, EXEC_PATH_ENVIRONMENT); | |
450 | pager_init(PERF_PAGER_ENVIRONMENT); | |
451 | ||
428dab81 | 452 | libperf_init(libperf_print); |
0c1fe6b2 | 453 | |
46113a54 | 454 | cmd = extract_argv0_path(argv[0]); |
07800601 IM |
455 | if (!cmd) |
456 | cmd = "perf-help"; | |
65d4b265 | 457 | |
14cbfbeb NK |
458 | srandom(time(NULL)); |
459 | ||
61a461fc ACM |
460 | /* Setting $PERF_CONFIG makes perf read _only_ the given config file. */ |
461 | config_exclusive_filename = getenv("PERF_CONFIG"); | |
462 | ||
ecc4c561 ACM |
463 | err = perf_config(perf_default_config, NULL); |
464 | if (err) | |
465 | return err; | |
58cb9d65 | 466 | set_buildid_dir(NULL); |
b8cbb349 | 467 | |
07800601 IM |
468 | /* |
469 | * "perf-xxxx" is the same as "perf xxxx", but we obviously: | |
470 | * | |
471 | * - cannot take flags in between the "perf" and the "xxxx". | |
472 | * - cannot execute it externally (since it would just do | |
473 | * the same thing over again) | |
474 | * | |
3192f1ed MW |
475 | * So we just directly call the internal command handler. If that one |
476 | * fails to handle this, then maybe we just run a renamed perf binary | |
477 | * that contains a dash in its name. To handle this scenario, we just | |
478 | * fall through and ignore the "xxxx" part of the command string. | |
07800601 | 479 | */ |
8e99b6d4 | 480 | if (strstarts(cmd, "perf-")) { |
266dfb0b | 481 | cmd += 5; |
07800601 IM |
482 | argv[0] = cmd; |
483 | handle_internal_command(argc, argv); | |
3192f1ed MW |
484 | /* |
485 | * If the command is handled, the above function does not | |
486 | * return undo changes and fall through in such a case. | |
487 | */ | |
488 | cmd -= 5; | |
489 | argv[0] = cmd; | |
07800601 | 490 | } |
8e99b6d4 | 491 | if (strstarts(cmd, "trace")) { |
22e9af4e | 492 | #if defined(HAVE_LIBAUDIT_SUPPORT) || defined(HAVE_SYSCALL_TABLE_SUPPORT) |
b52bc234 ACM |
493 | setup_path(); |
494 | argv[0] = "trace"; | |
b0ad8ea6 | 495 | return cmd_trace(argc, argv); |
1b572622 ACM |
496 | #else |
497 | fprintf(stderr, | |
498 | "trace command not available: missing audit-libs devel package at build time.\n"); | |
499 | goto out; | |
b52bc234 | 500 | #endif |
1b572622 | 501 | } |
07800601 IM |
502 | /* Look for flags.. */ |
503 | argv++; | |
504 | argc--; | |
505 | handle_options(&argv, &argc, NULL); | |
506 | commit_pager_choice(); | |
45de34bb | 507 | |
07800601 | 508 | if (argc > 0) { |
8e99b6d4 | 509 | if (strstarts(argv[0], "--")) |
07800601 IM |
510 | argv[0] += 2; |
511 | } else { | |
512 | /* The user didn't specify a command; give them help */ | |
502fc5c7 | 513 | printf("\n usage: %s\n\n", perf_usage_string); |
07800601 | 514 | list_common_cmds_help(); |
502fc5c7 | 515 | printf("\n %s\n\n", perf_more_info_string); |
2a16bf8c | 516 | goto out; |
07800601 IM |
517 | } |
518 | cmd = argv[0]; | |
519 | ||
52502bf2 JO |
520 | test_attr__init(); |
521 | ||
07800601 IM |
522 | /* |
523 | * We use PATH to find perf commands, but we prepend some higher | |
659431fc | 524 | * precedence paths: the "--exec-path" option, the PERF_EXEC_PATH |
07800601 IM |
525 | * environment, and the $(perfexecdir) from the Makefile at build |
526 | * time. | |
527 | */ | |
528 | setup_path(); | |
3af6e338 ACM |
529 | /* |
530 | * Block SIGWINCH notifications so that the thread that wants it can | |
531 | * unblock and get syscalls like select interrupted instead of waiting | |
532 | * forever while the signal goes to some other non interested thread. | |
533 | */ | |
534 | pthread__block_sigwinch(); | |
07800601 IM |
535 | |
536 | while (1) { | |
4c574159 | 537 | static int done_help; |
c6867701 ACM |
538 | |
539 | run_argv(&argc, &argv); | |
8035e428 | 540 | |
07800601 IM |
541 | if (errno != ENOENT) |
542 | break; | |
8035e428 | 543 | |
07800601 IM |
544 | if (!done_help) { |
545 | cmd = argv[0] = help_unknown_cmd(cmd); | |
546 | done_help = 1; | |
547 | } else | |
548 | break; | |
549 | } | |
550 | ||
551 | fprintf(stderr, "Failed to run command '%s': %s\n", | |
c8b5f2c9 | 552 | cmd, str_error_r(errno, sbuf, sizeof(sbuf))); |
2a16bf8c | 553 | out: |
07800601 IM |
554 | return 1; |
555 | } |