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" |
4b6ab94e | 12 | #include <subcmd/exec-cmd.h> |
148be2c1 IM |
13 | #include "util/cache.h" |
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"), | |
142 | OPT_ARGUMENT("perf-dir", "perf-dir"), | |
143 | OPT_ARGUMENT("work-tree", "work-tree"), | |
144 | OPT_ARGUMENT("debugfs-dir", "debugfs-dir"), | |
145 | OPT_ARGUMENT("buildid-dir", "buildid-dir"), | |
146 | OPT_ARGUMENT("list-cmds", "list-cmds"), | |
147 | OPT_ARGUMENT("list-opts", "list-opts"), | |
148 | OPT_ARGUMENT("debug", "debug"), | |
149 | OPT_END() | |
150 | }; | |
151 | ||
4c574159 | 152 | static int handle_options(const char ***argv, int *argc, int *envchanged) |
07800601 IM |
153 | { |
154 | int handled = 0; | |
155 | ||
156 | while (*argc > 0) { | |
157 | const char *cmd = (*argv)[0]; | |
158 | if (cmd[0] != '-') | |
159 | break; | |
160 | ||
161 | /* | |
162 | * For legacy reasons, the "version" and "help" | |
163 | * commands can be written with "--" prepended | |
164 | * to make them look like flags. | |
165 | */ | |
166 | if (!strcmp(cmd, "--help") || !strcmp(cmd, "--version")) | |
167 | break; | |
168 | ||
a1853e2c JO |
169 | /* |
170 | * Shortcut for '-h' and '-v' options to invoke help | |
171 | * and version command. | |
172 | */ | |
173 | if (!strcmp(cmd, "-h")) { | |
174 | (*argv)[0] = "--help"; | |
175 | break; | |
176 | } | |
177 | ||
178 | if (!strcmp(cmd, "-v")) { | |
179 | (*argv)[0] = "--version"; | |
180 | break; | |
181 | } | |
182 | ||
07800601 IM |
183 | /* |
184 | * Check remaining flags. | |
185 | */ | |
cfed95a6 VL |
186 | if (!prefixcmp(cmd, CMD_EXEC_PATH)) { |
187 | cmd += strlen(CMD_EXEC_PATH); | |
07800601 | 188 | if (*cmd == '=') |
46113a54 | 189 | set_argv_exec_path(cmd + 1); |
07800601 | 190 | else { |
46113a54 | 191 | puts(get_argv_exec_path()); |
07800601 IM |
192 | exit(0); |
193 | } | |
194 | } else if (!strcmp(cmd, "--html-path")) { | |
195 | puts(system_path(PERF_HTML_PATH)); | |
196 | exit(0); | |
197 | } else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) { | |
198 | use_pager = 1; | |
199 | } else if (!strcmp(cmd, "--no-pager")) { | |
200 | use_pager = 0; | |
201 | if (envchanged) | |
202 | *envchanged = 1; | |
203 | } else if (!strcmp(cmd, "--perf-dir")) { | |
204 | if (*argc < 2) { | |
4c574159 | 205 | fprintf(stderr, "No directory given for --perf-dir.\n"); |
07800601 IM |
206 | usage(perf_usage_string); |
207 | } | |
208 | setenv(PERF_DIR_ENVIRONMENT, (*argv)[1], 1); | |
209 | if (envchanged) | |
210 | *envchanged = 1; | |
211 | (*argv)++; | |
212 | (*argc)--; | |
213 | handled++; | |
cfed95a6 VL |
214 | } else if (!prefixcmp(cmd, CMD_PERF_DIR)) { |
215 | setenv(PERF_DIR_ENVIRONMENT, cmd + strlen(CMD_PERF_DIR), 1); | |
07800601 IM |
216 | if (envchanged) |
217 | *envchanged = 1; | |
218 | } else if (!strcmp(cmd, "--work-tree")) { | |
219 | if (*argc < 2) { | |
4c574159 | 220 | fprintf(stderr, "No directory given for --work-tree.\n"); |
07800601 IM |
221 | usage(perf_usage_string); |
222 | } | |
223 | setenv(PERF_WORK_TREE_ENVIRONMENT, (*argv)[1], 1); | |
224 | if (envchanged) | |
225 | *envchanged = 1; | |
226 | (*argv)++; | |
227 | (*argc)--; | |
cfed95a6 VL |
228 | } else if (!prefixcmp(cmd, CMD_WORK_TREE)) { |
229 | setenv(PERF_WORK_TREE_ENVIRONMENT, cmd + strlen(CMD_WORK_TREE), 1); | |
07800601 IM |
230 | if (envchanged) |
231 | *envchanged = 1; | |
5beeded1 JB |
232 | } else if (!strcmp(cmd, "--debugfs-dir")) { |
233 | if (*argc < 2) { | |
234 | fprintf(stderr, "No directory given for --debugfs-dir.\n"); | |
235 | usage(perf_usage_string); | |
236 | } | |
65d4b265 | 237 | tracing_path_set((*argv)[1]); |
5beeded1 JB |
238 | if (envchanged) |
239 | *envchanged = 1; | |
240 | (*argv)++; | |
241 | (*argc)--; | |
99ce8e9f JO |
242 | } else if (!strcmp(cmd, "--buildid-dir")) { |
243 | if (*argc < 2) { | |
244 | fprintf(stderr, "No directory given for --buildid-dir.\n"); | |
245 | usage(perf_usage_string); | |
246 | } | |
247 | set_buildid_dir((*argv)[1]); | |
248 | if (envchanged) | |
249 | *envchanged = 1; | |
250 | (*argv)++; | |
251 | (*argc)--; | |
cfed95a6 | 252 | } else if (!prefixcmp(cmd, CMD_DEBUGFS_DIR)) { |
65d4b265 | 253 | tracing_path_set(cmd + strlen(CMD_DEBUGFS_DIR)); |
9f30fffc | 254 | fprintf(stderr, "dir: %s\n", tracing_path); |
5beeded1 JB |
255 | if (envchanged) |
256 | *envchanged = 1; | |
98a4179c FW |
257 | } else if (!strcmp(cmd, "--list-cmds")) { |
258 | unsigned int i; | |
259 | ||
260 | for (i = 0; i < ARRAY_SIZE(commands); i++) { | |
261 | struct cmd_struct *p = commands+i; | |
262 | printf("%s ", p->cmd); | |
263 | } | |
ed457520 | 264 | putchar('\n'); |
98a4179c | 265 | exit(0); |
7335399a YS |
266 | } else if (!strcmp(cmd, "--list-opts")) { |
267 | unsigned int i; | |
268 | ||
269 | for (i = 0; i < ARRAY_SIZE(options)-1; i++) { | |
270 | struct option *p = options+i; | |
271 | printf("--%s ", p->long_name); | |
272 | } | |
273 | putchar('\n'); | |
274 | exit(0); | |
bbb2cea7 JO |
275 | } else if (!strcmp(cmd, "--debug")) { |
276 | if (*argc < 2) { | |
277 | fprintf(stderr, "No variable specified for --debug.\n"); | |
278 | usage(perf_usage_string); | |
279 | } | |
280 | if (perf_debug_option((*argv)[1])) | |
281 | usage(perf_usage_string); | |
282 | ||
283 | (*argv)++; | |
284 | (*argc)--; | |
07800601 IM |
285 | } else { |
286 | fprintf(stderr, "Unknown option: %s\n", cmd); | |
287 | usage(perf_usage_string); | |
288 | } | |
289 | ||
290 | (*argv)++; | |
291 | (*argc)--; | |
292 | handled++; | |
293 | } | |
294 | return handled; | |
295 | } | |
296 | ||
297 | static int handle_alias(int *argcp, const char ***argv) | |
298 | { | |
299 | int envchanged = 0, ret = 0, saved_errno = errno; | |
300 | int count, option_count; | |
4c574159 | 301 | const char **new_argv; |
07800601 IM |
302 | const char *alias_command; |
303 | char *alias_string; | |
07800601 IM |
304 | |
305 | alias_command = (*argv)[0]; | |
306 | alias_string = alias_lookup(alias_command); | |
307 | if (alias_string) { | |
308 | if (alias_string[0] == '!') { | |
309 | if (*argcp > 1) { | |
310 | struct strbuf buf; | |
311 | ||
70a6898f MH |
312 | if (strbuf_init(&buf, PATH_MAX) < 0 || |
313 | strbuf_addstr(&buf, alias_string) < 0 || | |
314 | sq_quote_argv(&buf, (*argv) + 1, | |
315 | PATH_MAX) < 0) | |
316 | die("Failed to allocate memory."); | |
07800601 IM |
317 | free(alias_string); |
318 | alias_string = buf.buf; | |
319 | } | |
320 | ret = system(alias_string + 1); | |
321 | if (ret >= 0 && WIFEXITED(ret) && | |
322 | WEXITSTATUS(ret) != 127) | |
323 | exit(WEXITSTATUS(ret)); | |
324 | die("Failed to run '%s' when expanding alias '%s'", | |
325 | alias_string + 1, alias_command); | |
326 | } | |
327 | count = split_cmdline(alias_string, &new_argv); | |
328 | if (count < 0) | |
329 | die("Bad alias.%s string", alias_command); | |
330 | option_count = handle_options(&new_argv, &count, &envchanged); | |
331 | if (envchanged) | |
332 | die("alias '%s' changes environment variables\n" | |
333 | "You can use '!perf' in the alias to do this.", | |
334 | alias_command); | |
335 | memmove(new_argv - option_count, new_argv, | |
336 | count * sizeof(char *)); | |
337 | new_argv -= option_count; | |
338 | ||
339 | if (count < 1) | |
340 | die("empty alias for %s", alias_command); | |
341 | ||
342 | if (!strcmp(alias_command, new_argv[0])) | |
343 | die("recursive alias: %s", alias_command); | |
344 | ||
4c574159 | 345 | new_argv = realloc(new_argv, sizeof(char *) * |
07800601 IM |
346 | (count + *argcp + 1)); |
347 | /* insert after command name */ | |
4c574159 TF |
348 | memcpy(new_argv + count, *argv + 1, sizeof(char *) * *argcp); |
349 | new_argv[count + *argcp] = NULL; | |
07800601 IM |
350 | |
351 | *argv = new_argv; | |
352 | *argcp += count - 1; | |
353 | ||
354 | ret = 1; | |
355 | } | |
356 | ||
357 | errno = saved_errno; | |
358 | ||
359 | return ret; | |
360 | } | |
361 | ||
362 | const char perf_version_string[] = PERF_VERSION; | |
363 | ||
364 | #define RUN_SETUP (1<<0) | |
365 | #define USE_PAGER (1<<1) | |
366 | /* | |
367 | * require working tree to be present -- anything uses this needs | |
368 | * RUN_SETUP for reading from the configuration file. | |
369 | */ | |
370 | #define NEED_WORK_TREE (1<<2) | |
371 | ||
07800601 IM |
372 | static int run_builtin(struct cmd_struct *p, int argc, const char **argv) |
373 | { | |
374 | int status; | |
375 | struct stat st; | |
376 | const char *prefix; | |
b2348e1d | 377 | char sbuf[STRERR_BUFSIZE]; |
07800601 IM |
378 | |
379 | prefix = NULL; | |
380 | if (p->option & RUN_SETUP) | |
381 | prefix = NULL; /* setup_perf_directory(); */ | |
382 | ||
5d06e691 | 383 | if (use_browser == -1) |
0020ce23 | 384 | use_browser = check_browser_config(p->cmd); |
5d06e691 | 385 | |
07800601 IM |
386 | if (use_pager == -1 && p->option & RUN_SETUP) |
387 | use_pager = check_pager_config(p->cmd); | |
388 | if (use_pager == -1 && p->option & USE_PAGER) | |
389 | use_pager = 1; | |
390 | commit_pager_choice(); | |
391 | ||
2bdb2c27 | 392 | perf_env__set_cmdline(&perf_env, argc, argv); |
07800601 | 393 | status = p->fn(argc, argv, prefix); |
f3a1f0ea | 394 | exit_browser(status); |
aa36ddd7 | 395 | perf_env__exit(&perf_env); |
84c86ca1 | 396 | bpf__clear(); |
f3a1f0ea | 397 | |
07800601 IM |
398 | if (status) |
399 | return status & 0xff; | |
400 | ||
401 | /* Somebody closed stdout? */ | |
402 | if (fstat(fileno(stdout), &st)) | |
403 | return 0; | |
404 | /* Ignore write errors for pipes and sockets.. */ | |
405 | if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode)) | |
406 | return 0; | |
407 | ||
2a16bf8c | 408 | status = 1; |
07800601 | 409 | /* Check for ENOSPC and EIO errors.. */ |
2a16bf8c | 410 | if (fflush(stdout)) { |
b2348e1d MH |
411 | fprintf(stderr, "write failure on standard output: %s", |
412 | strerror_r(errno, sbuf, sizeof(sbuf))); | |
2a16bf8c ACM |
413 | goto out; |
414 | } | |
415 | if (ferror(stdout)) { | |
416 | fprintf(stderr, "unknown write failure on standard output"); | |
417 | goto out; | |
418 | } | |
419 | if (fclose(stdout)) { | |
b2348e1d MH |
420 | fprintf(stderr, "close failed on standard output: %s", |
421 | strerror_r(errno, sbuf, sizeof(sbuf))); | |
2a16bf8c ACM |
422 | goto out; |
423 | } | |
424 | status = 0; | |
425 | out: | |
426 | return status; | |
07800601 IM |
427 | } |
428 | ||
429 | static void handle_internal_command(int argc, const char **argv) | |
430 | { | |
431 | const char *cmd = argv[0]; | |
f37a291c | 432 | unsigned int i; |
07800601 IM |
433 | static const char ext[] = STRIP_EXTENSION; |
434 | ||
435 | if (sizeof(ext) > 1) { | |
436 | i = strlen(argv[0]) - strlen(ext); | |
437 | if (i > 0 && !strcmp(argv[0] + i, ext)) { | |
438 | char *argv0 = strdup(argv[0]); | |
439 | argv[0] = cmd = argv0; | |
440 | argv0[i] = '\0'; | |
441 | } | |
442 | } | |
443 | ||
444 | /* Turn "perf cmd --help" into "perf help cmd" */ | |
445 | if (argc > 1 && !strcmp(argv[1], "--help")) { | |
446 | argv[1] = argv[0]; | |
447 | argv[0] = cmd = "help"; | |
448 | } | |
449 | ||
450 | for (i = 0; i < ARRAY_SIZE(commands); i++) { | |
451 | struct cmd_struct *p = commands+i; | |
452 | if (strcmp(p->cmd, cmd)) | |
453 | continue; | |
454 | exit(run_builtin(p, argc, argv)); | |
455 | } | |
456 | } | |
457 | ||
458 | static void execv_dashed_external(const char **argv) | |
459 | { | |
5104ffb2 | 460 | char *cmd; |
07800601 IM |
461 | const char *tmp; |
462 | int status; | |
463 | ||
5104ffb2 ACM |
464 | if (asprintf(&cmd, "perf-%s", argv[0]) < 0) |
465 | goto do_die; | |
07800601 IM |
466 | |
467 | /* | |
468 | * argv[0] must be the perf command, but the argv array | |
469 | * belongs to the caller, and may be reused in | |
470 | * subsequent loop iterations. Save argv[0] and | |
471 | * restore it on error. | |
472 | */ | |
473 | tmp = argv[0]; | |
5104ffb2 | 474 | argv[0] = cmd; |
07800601 IM |
475 | |
476 | /* | |
477 | * if we fail because the command is not found, it is | |
478 | * OK to return. Otherwise, we just pass along the status code. | |
479 | */ | |
480 | status = run_command_v_opt(argv, 0); | |
481 | if (status != -ERR_RUN_COMMAND_EXEC) { | |
5104ffb2 ACM |
482 | if (IS_RUN_COMMAND_ERR(status)) { |
483 | do_die: | |
07800601 | 484 | die("unable to run '%s'", argv[0]); |
5104ffb2 | 485 | } |
07800601 IM |
486 | exit(-status); |
487 | } | |
488 | errno = ENOENT; /* as if we called execvp */ | |
489 | ||
490 | argv[0] = tmp; | |
5104ffb2 | 491 | zfree(&cmd); |
07800601 IM |
492 | } |
493 | ||
494 | static int run_argv(int *argcp, const char ***argv) | |
495 | { | |
496 | int done_alias = 0; | |
497 | ||
498 | while (1) { | |
499 | /* See if it's an internal command */ | |
500 | handle_internal_command(*argcp, *argv); | |
501 | ||
502 | /* .. then try the external ones */ | |
503 | execv_dashed_external(*argv); | |
504 | ||
505 | /* It could be an alias -- this works around the insanity | |
506 | * of overriding "perf log" with "perf show" by having | |
507 | * alias.log = show | |
508 | */ | |
509 | if (done_alias || !handle_alias(argcp, argv)) | |
510 | break; | |
511 | done_alias = 1; | |
512 | } | |
513 | ||
514 | return done_alias; | |
515 | } | |
516 | ||
3af6e338 ACM |
517 | static void pthread__block_sigwinch(void) |
518 | { | |
519 | sigset_t set; | |
520 | ||
521 | sigemptyset(&set); | |
522 | sigaddset(&set, SIGWINCH); | |
523 | pthread_sigmask(SIG_BLOCK, &set, NULL); | |
524 | } | |
525 | ||
526 | void pthread__unblock_sigwinch(void) | |
527 | { | |
528 | sigset_t set; | |
529 | ||
530 | sigemptyset(&set); | |
531 | sigaddset(&set, SIGWINCH); | |
532 | pthread_sigmask(SIG_UNBLOCK, &set, NULL); | |
533 | } | |
534 | ||
07800601 IM |
535 | int main(int argc, const char **argv) |
536 | { | |
537 | const char *cmd; | |
b2348e1d | 538 | char sbuf[STRERR_BUFSIZE]; |
4cb93446 | 539 | int value; |
07800601 | 540 | |
096d3558 JP |
541 | /* libsubcmd init */ |
542 | exec_cmd_init("perf", PREFIX, PERF_EXEC_PATH, EXEC_PATH_ENVIRONMENT); | |
543 | pager_init(PERF_PAGER_ENVIRONMENT); | |
544 | ||
918512b4 | 545 | /* The page_size is placed in util object. */ |
0c1fe6b2 | 546 | page_size = sysconf(_SC_PAGE_SIZE); |
2b1b7100 | 547 | cacheline_size = sysconf(_SC_LEVEL1_DCACHE_LINESIZE); |
0c1fe6b2 | 548 | |
4cb93446 ACM |
549 | if (sysctl__read_int("kernel/perf_event_max_stack", &value) == 0) |
550 | sysctl_perf_event_max_stack = value; | |
551 | ||
a29d5c9b ACM |
552 | if (sysctl__read_int("kernel/perf_event_max_contexts_per_stack", &value) == 0) |
553 | sysctl_perf_event_max_contexts_per_stack = value; | |
554 | ||
46113a54 | 555 | cmd = extract_argv0_path(argv[0]); |
07800601 IM |
556 | if (!cmd) |
557 | cmd = "perf-help"; | |
65d4b265 | 558 | |
14cbfbeb NK |
559 | srandom(time(NULL)); |
560 | ||
b8cbb349 | 561 | perf_config(perf_default_config, NULL); |
58cb9d65 | 562 | set_buildid_dir(NULL); |
b8cbb349 | 563 | |
65d4b265 JO |
564 | /* get debugfs/tracefs mount point from /proc/mounts */ |
565 | tracing_path_mount(); | |
566 | ||
07800601 IM |
567 | /* |
568 | * "perf-xxxx" is the same as "perf xxxx", but we obviously: | |
569 | * | |
570 | * - cannot take flags in between the "perf" and the "xxxx". | |
571 | * - cannot execute it externally (since it would just do | |
572 | * the same thing over again) | |
573 | * | |
574 | * So we just directly call the internal command handler, and | |
575 | * die if that one cannot handle it. | |
576 | */ | |
577 | if (!prefixcmp(cmd, "perf-")) { | |
266dfb0b | 578 | cmd += 5; |
07800601 IM |
579 | argv[0] = cmd; |
580 | handle_internal_command(argc, argv); | |
2a16bf8c ACM |
581 | fprintf(stderr, "cannot handle %s internally", cmd); |
582 | goto out; | |
07800601 | 583 | } |
b52bc234 | 584 | if (!prefixcmp(cmd, "trace")) { |
1b572622 | 585 | #ifdef HAVE_LIBAUDIT_SUPPORT |
b52bc234 ACM |
586 | setup_path(); |
587 | argv[0] = "trace"; | |
588 | return cmd_trace(argc, argv, NULL); | |
1b572622 ACM |
589 | #else |
590 | fprintf(stderr, | |
591 | "trace command not available: missing audit-libs devel package at build time.\n"); | |
592 | goto out; | |
b52bc234 | 593 | #endif |
1b572622 | 594 | } |
07800601 IM |
595 | /* Look for flags.. */ |
596 | argv++; | |
597 | argc--; | |
598 | handle_options(&argv, &argc, NULL); | |
599 | commit_pager_choice(); | |
45de34bb | 600 | |
07800601 IM |
601 | if (argc > 0) { |
602 | if (!prefixcmp(argv[0], "--")) | |
603 | argv[0] += 2; | |
604 | } else { | |
605 | /* The user didn't specify a command; give them help */ | |
502fc5c7 | 606 | printf("\n usage: %s\n\n", perf_usage_string); |
07800601 | 607 | list_common_cmds_help(); |
502fc5c7 | 608 | printf("\n %s\n\n", perf_more_info_string); |
2a16bf8c | 609 | goto out; |
07800601 IM |
610 | } |
611 | cmd = argv[0]; | |
612 | ||
52502bf2 JO |
613 | test_attr__init(); |
614 | ||
07800601 IM |
615 | /* |
616 | * We use PATH to find perf commands, but we prepend some higher | |
659431fc | 617 | * precedence paths: the "--exec-path" option, the PERF_EXEC_PATH |
07800601 IM |
618 | * environment, and the $(perfexecdir) from the Makefile at build |
619 | * time. | |
620 | */ | |
621 | setup_path(); | |
3af6e338 ACM |
622 | /* |
623 | * Block SIGWINCH notifications so that the thread that wants it can | |
624 | * unblock and get syscalls like select interrupted instead of waiting | |
625 | * forever while the signal goes to some other non interested thread. | |
626 | */ | |
627 | pthread__block_sigwinch(); | |
07800601 | 628 | |
dd629cc0 JO |
629 | perf_debug_setup(); |
630 | ||
07800601 | 631 | while (1) { |
4c574159 | 632 | static int done_help; |
b5ded713 | 633 | int was_alias = run_argv(&argc, &argv); |
8035e428 | 634 | |
07800601 IM |
635 | if (errno != ENOENT) |
636 | break; | |
8035e428 | 637 | |
07800601 IM |
638 | if (was_alias) { |
639 | fprintf(stderr, "Expansion of alias '%s' failed; " | |
640 | "'%s' is not a perf-command\n", | |
641 | cmd, argv[0]); | |
2a16bf8c | 642 | goto out; |
07800601 IM |
643 | } |
644 | if (!done_help) { | |
645 | cmd = argv[0] = help_unknown_cmd(cmd); | |
646 | done_help = 1; | |
647 | } else | |
648 | break; | |
649 | } | |
650 | ||
651 | fprintf(stderr, "Failed to run command '%s': %s\n", | |
b2348e1d | 652 | cmd, strerror_r(errno, sbuf, sizeof(sbuf))); |
2a16bf8c | 653 | out: |
07800601 IM |
654 | return 1; |
655 | } |