blob: aaee0a7827477810c5c0d2d82753545592d7f22f [file] [log] [blame]
Ingo Molnarbf9e1872009-06-02 23:37:05 +02001/*
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 */
Ingo Molnar07800602009-04-20 15:00:56 +02009#include "builtin.h"
Ingo Molnarbf9e1872009-06-02 23:37:05 +020010
Arnaldo Carvalho de Meloaa36ddd2015-09-09 10:37:01 -030011#include "util/env.h"
Josh Poimboeuf4b6ab942015-12-15 09:39:39 -060012#include <subcmd/exec-cmd.h>
Ingo Molnar148be2c2009-04-27 08:02:14 +020013#include "util/cache.h"
14#include "util/quote.h"
Josh Poimboeuf4b6ab942015-12-15 09:39:39 -060015#include <subcmd/run-command.h>
Jason Baron5beeded2009-07-21 14:16:29 -040016#include "util/parse-events.h"
Josh Poimboeuf4b6ab942015-12-15 09:39:39 -060017#include <subcmd/parse-options.h>
Wang Nan84c86ca2015-10-14 12:41:14 +000018#include "util/bpf-loader.h"
Jiri Olsabbb2cea2014-07-17 12:55:00 +020019#include "util/debug.h"
Jiri Olsa592d5a62015-09-02 09:56:34 +020020#include <api/fs/tracing_path.h>
Irina Tirdea27683dc2012-09-08 03:43:19 +030021#include <pthread.h>
Namhyung Kim14cbfbeb2016-01-07 20:41:53 +090022#include <stdlib.h>
23#include <time.h>
Ingo Molnar07800602009-04-20 15:00:56 +020024
25const char perf_usage_string[] =
Jiri Olsa78a1b502014-07-18 09:11:30 +020026 "perf [--version] [--help] [OPTIONS] COMMAND [ARGS]";
Ingo Molnar07800602009-04-20 15:00:56 +020027
28const char perf_more_info_string[] =
29 "See 'perf help COMMAND' for more information on a specific command.";
30
Arnaldo Carvalho de Melo5d06e692010-05-20 22:01:10 -030031int use_browser = -1;
Ingo Molnar07800602009-04-20 15:00:56 +020032static int use_pager = -1;
Feng Tang70cb4e92012-10-30 11:56:02 +080033const char *input_name;
Arnaldo Carvalho de Melo5d06e692010-05-20 22:01:10 -030034
Frederic Weisbecker98a41792012-08-09 16:31:51 +020035struct cmd_struct {
36 const char *cmd;
37 int (*fn)(int, const char **, const char *);
38 int option;
39};
40
41static struct cmd_struct commands[] = {
42 { "buildid-cache", cmd_buildid_cache, 0 },
43 { "buildid-list", cmd_buildid_list, 0 },
Taeung Song30862f22015-11-17 22:53:21 +090044 { "config", cmd_config, 0 },
Frederic Weisbecker98a41792012-08-09 16:31:51 +020045 { "diff", cmd_diff, 0 },
46 { "evlist", cmd_evlist, 0 },
47 { "help", cmd_help, 0 },
48 { "list", cmd_list, 0 },
49 { "record", cmd_record, 0 },
50 { "report", cmd_report, 0 },
51 { "bench", cmd_bench, 0 },
52 { "stat", cmd_stat, 0 },
53 { "timechart", cmd_timechart, 0 },
54 { "top", cmd_top, 0 },
55 { "annotate", cmd_annotate, 0 },
56 { "version", cmd_version, 0 },
57 { "script", cmd_script, 0 },
58 { "sched", cmd_sched, 0 },
Ingo Molnar89fe8082013-09-30 12:07:11 +020059#ifdef HAVE_LIBELF_SUPPORT
Frederic Weisbecker98a41792012-08-09 16:31:51 +020060 { "probe", cmd_probe, 0 },
Namhyung Kim393be2e2012-08-06 13:41:21 +090061#endif
Frederic Weisbecker98a41792012-08-09 16:31:51 +020062 { "kmem", cmd_kmem, 0 },
63 { "lock", cmd_lock, 0 },
64 { "kvm", cmd_kvm, 0 },
65 { "test", cmd_test, 0 },
Ingo Molnar89fe8082013-09-30 12:07:11 +020066#ifdef HAVE_LIBAUDIT_SUPPORT
Arnaldo Carvalho de Melo514f1c62012-09-26 20:05:56 -030067 { "trace", cmd_trace, 0 },
Namhyung Kim4d290892012-09-27 20:23:38 +090068#endif
Frederic Weisbecker98a41792012-08-09 16:31:51 +020069 { "inject", cmd_inject, 0 },
Stephane Eranian028f12e2013-01-24 16:10:38 +010070 { "mem", cmd_mem, 0 },
Jiri Olsa2245bf12015-02-20 23:16:59 +010071 { "data", cmd_data, 0 },
Frederic Weisbecker98a41792012-08-09 16:31:51 +020072};
73
Ingo Molnar07800602009-04-20 15:00:56 +020074struct pager_config {
75 const char *cmd;
76 int val;
77};
78
79static int pager_command_config(const char *var, const char *value, void *data)
80{
81 struct pager_config *c = data;
82 if (!prefixcmp(var, "pager.") && !strcmp(var + 6, c->cmd))
83 c->val = perf_config_bool(var, value);
84 return 0;
85}
86
87/* returns 0 for "no pager", 1 for "use pager", and -1 for "not specified" */
88int check_pager_config(const char *cmd)
89{
90 struct pager_config c;
91 c.cmd = cmd;
92 c.val = -1;
93 perf_config(pager_command_config, &c);
94 return c.val;
95}
96
Namhyung Kim0020ce22012-11-12 11:50:17 +090097static int browser_command_config(const char *var, const char *value, void *data)
Arnaldo Carvalho de Melo5d06e692010-05-20 22:01:10 -030098{
99 struct pager_config *c = data;
100 if (!prefixcmp(var, "tui.") && !strcmp(var + 4, c->cmd))
101 c->val = perf_config_bool(var, value);
Namhyung Kim0020ce22012-11-12 11:50:17 +0900102 if (!prefixcmp(var, "gtk.") && !strcmp(var + 4, c->cmd))
103 c->val = perf_config_bool(var, value) ? 2 : 0;
Arnaldo Carvalho de Melo5d06e692010-05-20 22:01:10 -0300104 return 0;
105}
106
Namhyung Kim0020ce22012-11-12 11:50:17 +0900107/*
108 * returns 0 for "no tui", 1 for "use tui", 2 for "use gtk",
109 * and -1 for "not specified"
110 */
111static int check_browser_config(const char *cmd)
Arnaldo Carvalho de Melo5d06e692010-05-20 22:01:10 -0300112{
113 struct pager_config c;
114 c.cmd = cmd;
115 c.val = -1;
Namhyung Kim0020ce22012-11-12 11:50:17 +0900116 perf_config(browser_command_config, &c);
Arnaldo Carvalho de Melo5d06e692010-05-20 22:01:10 -0300117 return c.val;
118}
119
Thiago Farina4c574152010-01-27 21:05:55 -0200120static void commit_pager_choice(void)
121{
Ingo Molnar07800602009-04-20 15:00:56 +0200122 switch (use_pager) {
123 case 0:
Josh Poimboeuf096d3552015-12-15 09:39:35 -0600124 setenv(PERF_PAGER_ENVIRONMENT, "cat", 1);
Ingo Molnar07800602009-04-20 15:00:56 +0200125 break;
126 case 1:
127 /* setup_pager(); */
128 break;
129 default:
130 break;
131 }
132}
133
Yunlong Song73353992015-02-27 18:21:31 +0800134struct option options[] = {
135 OPT_ARGUMENT("help", "help"),
136 OPT_ARGUMENT("version", "version"),
137 OPT_ARGUMENT("exec-path", "exec-path"),
138 OPT_ARGUMENT("html-path", "html-path"),
139 OPT_ARGUMENT("paginate", "paginate"),
140 OPT_ARGUMENT("no-pager", "no-pager"),
141 OPT_ARGUMENT("perf-dir", "perf-dir"),
142 OPT_ARGUMENT("work-tree", "work-tree"),
143 OPT_ARGUMENT("debugfs-dir", "debugfs-dir"),
144 OPT_ARGUMENT("buildid-dir", "buildid-dir"),
145 OPT_ARGUMENT("list-cmds", "list-cmds"),
146 OPT_ARGUMENT("list-opts", "list-opts"),
147 OPT_ARGUMENT("debug", "debug"),
148 OPT_END()
149};
150
Thiago Farina4c574152010-01-27 21:05:55 -0200151static int handle_options(const char ***argv, int *argc, int *envchanged)
Ingo Molnar07800602009-04-20 15:00:56 +0200152{
153 int handled = 0;
154
155 while (*argc > 0) {
156 const char *cmd = (*argv)[0];
157 if (cmd[0] != '-')
158 break;
159
160 /*
161 * For legacy reasons, the "version" and "help"
162 * commands can be written with "--" prepended
163 * to make them look like flags.
164 */
165 if (!strcmp(cmd, "--help") || !strcmp(cmd, "--version"))
166 break;
167
168 /*
Jiri Olsaa1853e22015-10-05 20:06:09 +0200169 * Shortcut for '-h' and '-v' options to invoke help
170 * and version command.
171 */
172 if (!strcmp(cmd, "-h")) {
173 (*argv)[0] = "--help";
174 break;
175 }
176
177 if (!strcmp(cmd, "-v")) {
178 (*argv)[0] = "--version";
179 break;
180 }
181
182 /*
Ingo Molnar07800602009-04-20 15:00:56 +0200183 * Check remaining flags.
184 */
Vincent Legollcfed95a2009-10-13 10:18:16 +0200185 if (!prefixcmp(cmd, CMD_EXEC_PATH)) {
186 cmd += strlen(CMD_EXEC_PATH);
Ingo Molnar07800602009-04-20 15:00:56 +0200187 if (*cmd == '=')
Josh Poimboeuf46113a52015-12-15 09:39:37 -0600188 set_argv_exec_path(cmd + 1);
Ingo Molnar07800602009-04-20 15:00:56 +0200189 else {
Josh Poimboeuf46113a52015-12-15 09:39:37 -0600190 puts(get_argv_exec_path());
Ingo Molnar07800602009-04-20 15:00:56 +0200191 exit(0);
192 }
193 } else if (!strcmp(cmd, "--html-path")) {
194 puts(system_path(PERF_HTML_PATH));
195 exit(0);
196 } else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) {
197 use_pager = 1;
198 } else if (!strcmp(cmd, "--no-pager")) {
199 use_pager = 0;
200 if (envchanged)
201 *envchanged = 1;
202 } else if (!strcmp(cmd, "--perf-dir")) {
203 if (*argc < 2) {
Thiago Farina4c574152010-01-27 21:05:55 -0200204 fprintf(stderr, "No directory given for --perf-dir.\n");
Ingo Molnar07800602009-04-20 15:00:56 +0200205 usage(perf_usage_string);
206 }
207 setenv(PERF_DIR_ENVIRONMENT, (*argv)[1], 1);
208 if (envchanged)
209 *envchanged = 1;
210 (*argv)++;
211 (*argc)--;
212 handled++;
Vincent Legollcfed95a2009-10-13 10:18:16 +0200213 } else if (!prefixcmp(cmd, CMD_PERF_DIR)) {
214 setenv(PERF_DIR_ENVIRONMENT, cmd + strlen(CMD_PERF_DIR), 1);
Ingo Molnar07800602009-04-20 15:00:56 +0200215 if (envchanged)
216 *envchanged = 1;
217 } else if (!strcmp(cmd, "--work-tree")) {
218 if (*argc < 2) {
Thiago Farina4c574152010-01-27 21:05:55 -0200219 fprintf(stderr, "No directory given for --work-tree.\n");
Ingo Molnar07800602009-04-20 15:00:56 +0200220 usage(perf_usage_string);
221 }
222 setenv(PERF_WORK_TREE_ENVIRONMENT, (*argv)[1], 1);
223 if (envchanged)
224 *envchanged = 1;
225 (*argv)++;
226 (*argc)--;
Vincent Legollcfed95a2009-10-13 10:18:16 +0200227 } else if (!prefixcmp(cmd, CMD_WORK_TREE)) {
228 setenv(PERF_WORK_TREE_ENVIRONMENT, cmd + strlen(CMD_WORK_TREE), 1);
Ingo Molnar07800602009-04-20 15:00:56 +0200229 if (envchanged)
230 *envchanged = 1;
Jason Baron5beeded2009-07-21 14:16:29 -0400231 } else if (!strcmp(cmd, "--debugfs-dir")) {
232 if (*argc < 2) {
233 fprintf(stderr, "No directory given for --debugfs-dir.\n");
234 usage(perf_usage_string);
235 }
Jiri Olsa65d4b262015-09-02 09:56:33 +0200236 tracing_path_set((*argv)[1]);
Jason Baron5beeded2009-07-21 14:16:29 -0400237 if (envchanged)
238 *envchanged = 1;
239 (*argv)++;
240 (*argc)--;
Jiri Olsa99ce8e92014-12-01 20:06:24 +0100241 } else if (!strcmp(cmd, "--buildid-dir")) {
242 if (*argc < 2) {
243 fprintf(stderr, "No directory given for --buildid-dir.\n");
244 usage(perf_usage_string);
245 }
246 set_buildid_dir((*argv)[1]);
247 if (envchanged)
248 *envchanged = 1;
249 (*argv)++;
250 (*argc)--;
Vincent Legollcfed95a2009-10-13 10:18:16 +0200251 } else if (!prefixcmp(cmd, CMD_DEBUGFS_DIR)) {
Jiri Olsa65d4b262015-09-02 09:56:33 +0200252 tracing_path_set(cmd + strlen(CMD_DEBUGFS_DIR));
Jiri Olsa9f30fff2015-08-26 15:46:45 +0200253 fprintf(stderr, "dir: %s\n", tracing_path);
Jason Baron5beeded2009-07-21 14:16:29 -0400254 if (envchanged)
255 *envchanged = 1;
Frederic Weisbecker98a41792012-08-09 16:31:51 +0200256 } else if (!strcmp(cmd, "--list-cmds")) {
257 unsigned int i;
258
259 for (i = 0; i < ARRAY_SIZE(commands); i++) {
260 struct cmd_struct *p = commands+i;
261 printf("%s ", p->cmd);
262 }
Yunlong Songed457522015-02-27 18:21:29 +0800263 putchar('\n');
Frederic Weisbecker98a41792012-08-09 16:31:51 +0200264 exit(0);
Yunlong Song73353992015-02-27 18:21:31 +0800265 } else if (!strcmp(cmd, "--list-opts")) {
266 unsigned int i;
267
268 for (i = 0; i < ARRAY_SIZE(options)-1; i++) {
269 struct option *p = options+i;
270 printf("--%s ", p->long_name);
271 }
272 putchar('\n');
273 exit(0);
Jiri Olsabbb2cea2014-07-17 12:55:00 +0200274 } else if (!strcmp(cmd, "--debug")) {
275 if (*argc < 2) {
276 fprintf(stderr, "No variable specified for --debug.\n");
277 usage(perf_usage_string);
278 }
279 if (perf_debug_option((*argv)[1]))
280 usage(perf_usage_string);
281
282 (*argv)++;
283 (*argc)--;
Ingo Molnar07800602009-04-20 15:00:56 +0200284 } else {
285 fprintf(stderr, "Unknown option: %s\n", cmd);
286 usage(perf_usage_string);
287 }
288
289 (*argv)++;
290 (*argc)--;
291 handled++;
292 }
293 return handled;
294}
295
296static int handle_alias(int *argcp, const char ***argv)
297{
298 int envchanged = 0, ret = 0, saved_errno = errno;
299 int count, option_count;
Thiago Farina4c574152010-01-27 21:05:55 -0200300 const char **new_argv;
Ingo Molnar07800602009-04-20 15:00:56 +0200301 const char *alias_command;
302 char *alias_string;
Ingo Molnar07800602009-04-20 15:00:56 +0200303
304 alias_command = (*argv)[0];
305 alias_string = alias_lookup(alias_command);
306 if (alias_string) {
307 if (alias_string[0] == '!') {
308 if (*argcp > 1) {
309 struct strbuf buf;
310
311 strbuf_init(&buf, PATH_MAX);
312 strbuf_addstr(&buf, alias_string);
313 sq_quote_argv(&buf, (*argv) + 1, PATH_MAX);
314 free(alias_string);
315 alias_string = buf.buf;
316 }
317 ret = system(alias_string + 1);
318 if (ret >= 0 && WIFEXITED(ret) &&
319 WEXITSTATUS(ret) != 127)
320 exit(WEXITSTATUS(ret));
321 die("Failed to run '%s' when expanding alias '%s'",
322 alias_string + 1, alias_command);
323 }
324 count = split_cmdline(alias_string, &new_argv);
325 if (count < 0)
326 die("Bad alias.%s string", alias_command);
327 option_count = handle_options(&new_argv, &count, &envchanged);
328 if (envchanged)
329 die("alias '%s' changes environment variables\n"
330 "You can use '!perf' in the alias to do this.",
331 alias_command);
332 memmove(new_argv - option_count, new_argv,
333 count * sizeof(char *));
334 new_argv -= option_count;
335
336 if (count < 1)
337 die("empty alias for %s", alias_command);
338
339 if (!strcmp(alias_command, new_argv[0]))
340 die("recursive alias: %s", alias_command);
341
Thiago Farina4c574152010-01-27 21:05:55 -0200342 new_argv = realloc(new_argv, sizeof(char *) *
Ingo Molnar07800602009-04-20 15:00:56 +0200343 (count + *argcp + 1));
344 /* insert after command name */
Thiago Farina4c574152010-01-27 21:05:55 -0200345 memcpy(new_argv + count, *argv + 1, sizeof(char *) * *argcp);
346 new_argv[count + *argcp] = NULL;
Ingo Molnar07800602009-04-20 15:00:56 +0200347
348 *argv = new_argv;
349 *argcp += count - 1;
350
351 ret = 1;
352 }
353
354 errno = saved_errno;
355
356 return ret;
357}
358
359const char perf_version_string[] = PERF_VERSION;
360
361#define RUN_SETUP (1<<0)
362#define USE_PAGER (1<<1)
363/*
364 * require working tree to be present -- anything uses this needs
365 * RUN_SETUP for reading from the configuration file.
366 */
367#define NEED_WORK_TREE (1<<2)
368
Ingo Molnar07800602009-04-20 15:00:56 +0200369static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
370{
371 int status;
372 struct stat st;
373 const char *prefix;
Masami Hiramatsub2348e12014-08-14 02:22:32 +0000374 char sbuf[STRERR_BUFSIZE];
Ingo Molnar07800602009-04-20 15:00:56 +0200375
376 prefix = NULL;
377 if (p->option & RUN_SETUP)
378 prefix = NULL; /* setup_perf_directory(); */
379
Arnaldo Carvalho de Melo5d06e692010-05-20 22:01:10 -0300380 if (use_browser == -1)
Namhyung Kim0020ce22012-11-12 11:50:17 +0900381 use_browser = check_browser_config(p->cmd);
Arnaldo Carvalho de Melo5d06e692010-05-20 22:01:10 -0300382
Ingo Molnar07800602009-04-20 15:00:56 +0200383 if (use_pager == -1 && p->option & RUN_SETUP)
384 use_pager = check_pager_config(p->cmd);
385 if (use_pager == -1 && p->option & USE_PAGER)
386 use_pager = 1;
387 commit_pager_choice();
388
Josh Poimboeuf2bdb2c22015-12-07 22:21:46 -0600389 perf_env__set_cmdline(&perf_env, argc, argv);
Ingo Molnar07800602009-04-20 15:00:56 +0200390 status = p->fn(argc, argv, prefix);
Arnaldo Carvalho de Melof3a1f0e2010-03-22 13:10:25 -0300391 exit_browser(status);
Arnaldo Carvalho de Meloaa36ddd2015-09-09 10:37:01 -0300392 perf_env__exit(&perf_env);
Wang Nan84c86ca2015-10-14 12:41:14 +0000393 bpf__clear();
Arnaldo Carvalho de Melof3a1f0e2010-03-22 13:10:25 -0300394
Ingo Molnar07800602009-04-20 15:00:56 +0200395 if (status)
396 return status & 0xff;
397
398 /* Somebody closed stdout? */
399 if (fstat(fileno(stdout), &st))
400 return 0;
401 /* Ignore write errors for pipes and sockets.. */
402 if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode))
403 return 0;
404
Arnaldo Carvalho de Melo2a16bf82013-01-24 15:18:54 -0300405 status = 1;
Ingo Molnar07800602009-04-20 15:00:56 +0200406 /* Check for ENOSPC and EIO errors.. */
Arnaldo Carvalho de Melo2a16bf82013-01-24 15:18:54 -0300407 if (fflush(stdout)) {
Masami Hiramatsub2348e12014-08-14 02:22:32 +0000408 fprintf(stderr, "write failure on standard output: %s",
409 strerror_r(errno, sbuf, sizeof(sbuf)));
Arnaldo Carvalho de Melo2a16bf82013-01-24 15:18:54 -0300410 goto out;
411 }
412 if (ferror(stdout)) {
413 fprintf(stderr, "unknown write failure on standard output");
414 goto out;
415 }
416 if (fclose(stdout)) {
Masami Hiramatsub2348e12014-08-14 02:22:32 +0000417 fprintf(stderr, "close failed on standard output: %s",
418 strerror_r(errno, sbuf, sizeof(sbuf)));
Arnaldo Carvalho de Melo2a16bf82013-01-24 15:18:54 -0300419 goto out;
420 }
421 status = 0;
422out:
423 return status;
Ingo Molnar07800602009-04-20 15:00:56 +0200424}
425
426static void handle_internal_command(int argc, const char **argv)
427{
428 const char *cmd = argv[0];
Ingo Molnarf37a2912009-07-01 12:37:06 +0200429 unsigned int i;
Ingo Molnar07800602009-04-20 15:00:56 +0200430 static const char ext[] = STRIP_EXTENSION;
431
432 if (sizeof(ext) > 1) {
433 i = strlen(argv[0]) - strlen(ext);
434 if (i > 0 && !strcmp(argv[0] + i, ext)) {
435 char *argv0 = strdup(argv[0]);
436 argv[0] = cmd = argv0;
437 argv0[i] = '\0';
438 }
439 }
440
441 /* Turn "perf cmd --help" into "perf help cmd" */
442 if (argc > 1 && !strcmp(argv[1], "--help")) {
443 argv[1] = argv[0];
444 argv[0] = cmd = "help";
445 }
446
447 for (i = 0; i < ARRAY_SIZE(commands); i++) {
448 struct cmd_struct *p = commands+i;
449 if (strcmp(p->cmd, cmd))
450 continue;
451 exit(run_builtin(p, argc, argv));
452 }
453}
454
455static void execv_dashed_external(const char **argv)
456{
Arnaldo Carvalho de Melo5104ffb2016-02-25 10:14:50 -0300457 char *cmd;
Ingo Molnar07800602009-04-20 15:00:56 +0200458 const char *tmp;
459 int status;
460
Arnaldo Carvalho de Melo5104ffb2016-02-25 10:14:50 -0300461 if (asprintf(&cmd, "perf-%s", argv[0]) < 0)
462 goto do_die;
Ingo Molnar07800602009-04-20 15:00:56 +0200463
464 /*
465 * argv[0] must be the perf command, but the argv array
466 * belongs to the caller, and may be reused in
467 * subsequent loop iterations. Save argv[0] and
468 * restore it on error.
469 */
470 tmp = argv[0];
Arnaldo Carvalho de Melo5104ffb2016-02-25 10:14:50 -0300471 argv[0] = cmd;
Ingo Molnar07800602009-04-20 15:00:56 +0200472
473 /*
474 * if we fail because the command is not found, it is
475 * OK to return. Otherwise, we just pass along the status code.
476 */
477 status = run_command_v_opt(argv, 0);
478 if (status != -ERR_RUN_COMMAND_EXEC) {
Arnaldo Carvalho de Melo5104ffb2016-02-25 10:14:50 -0300479 if (IS_RUN_COMMAND_ERR(status)) {
480do_die:
Ingo Molnar07800602009-04-20 15:00:56 +0200481 die("unable to run '%s'", argv[0]);
Arnaldo Carvalho de Melo5104ffb2016-02-25 10:14:50 -0300482 }
Ingo Molnar07800602009-04-20 15:00:56 +0200483 exit(-status);
484 }
485 errno = ENOENT; /* as if we called execvp */
486
487 argv[0] = tmp;
Arnaldo Carvalho de Melo5104ffb2016-02-25 10:14:50 -0300488 zfree(&cmd);
Ingo Molnar07800602009-04-20 15:00:56 +0200489}
490
491static int run_argv(int *argcp, const char ***argv)
492{
493 int done_alias = 0;
494
495 while (1) {
496 /* See if it's an internal command */
497 handle_internal_command(*argcp, *argv);
498
499 /* .. then try the external ones */
500 execv_dashed_external(*argv);
501
502 /* It could be an alias -- this works around the insanity
503 * of overriding "perf log" with "perf show" by having
504 * alias.log = show
505 */
506 if (done_alias || !handle_alias(argcp, argv))
507 break;
508 done_alias = 1;
509 }
510
511 return done_alias;
512}
513
Arnaldo Carvalho de Melo3af6e332011-10-13 08:52:46 -0300514static void pthread__block_sigwinch(void)
515{
516 sigset_t set;
517
518 sigemptyset(&set);
519 sigaddset(&set, SIGWINCH);
520 pthread_sigmask(SIG_BLOCK, &set, NULL);
521}
522
523void pthread__unblock_sigwinch(void)
524{
525 sigset_t set;
526
527 sigemptyset(&set);
528 sigaddset(&set, SIGWINCH);
529 pthread_sigmask(SIG_UNBLOCK, &set, NULL);
530}
531
Ingo Molnar07800602009-04-20 15:00:56 +0200532int main(int argc, const char **argv)
533{
534 const char *cmd;
Masami Hiramatsub2348e12014-08-14 02:22:32 +0000535 char sbuf[STRERR_BUFSIZE];
Ingo Molnar07800602009-04-20 15:00:56 +0200536
Josh Poimboeuf096d3552015-12-15 09:39:35 -0600537 /* libsubcmd init */
538 exec_cmd_init("perf", PREFIX, PERF_EXEC_PATH, EXEC_PATH_ENVIRONMENT);
539 pager_init(PERF_PAGER_ENVIRONMENT);
540
Jiri Olsa918512b2013-09-12 18:39:35 +0200541 /* The page_size is placed in util object. */
Arnaldo Carvalho de Melo0c1fe6b2012-10-06 14:57:10 -0300542 page_size = sysconf(_SC_PAGE_SIZE);
Don Zickus2b1b7102014-05-30 16:10:05 -0400543 cacheline_size = sysconf(_SC_LEVEL1_DCACHE_LINESIZE);
Arnaldo Carvalho de Melo0c1fe6b2012-10-06 14:57:10 -0300544
Josh Poimboeuf46113a52015-12-15 09:39:37 -0600545 cmd = extract_argv0_path(argv[0]);
Ingo Molnar07800602009-04-20 15:00:56 +0200546 if (!cmd)
547 cmd = "perf-help";
Jiri Olsa65d4b262015-09-02 09:56:33 +0200548
Namhyung Kim14cbfbeb2016-01-07 20:41:53 +0900549 srandom(time(NULL));
550
Wang Nanb8cbb342016-02-26 09:31:51 +0000551 perf_config(perf_default_config, NULL);
552
Jiri Olsa65d4b262015-09-02 09:56:33 +0200553 /* get debugfs/tracefs mount point from /proc/mounts */
554 tracing_path_mount();
555
Ingo Molnar07800602009-04-20 15:00:56 +0200556 /*
557 * "perf-xxxx" is the same as "perf xxxx", but we obviously:
558 *
559 * - cannot take flags in between the "perf" and the "xxxx".
560 * - cannot execute it externally (since it would just do
561 * the same thing over again)
562 *
563 * So we just directly call the internal command handler, and
564 * die if that one cannot handle it.
565 */
566 if (!prefixcmp(cmd, "perf-")) {
Peter Zijlstra266dfb02009-05-25 14:45:24 +0200567 cmd += 5;
Ingo Molnar07800602009-04-20 15:00:56 +0200568 argv[0] = cmd;
569 handle_internal_command(argc, argv);
Arnaldo Carvalho de Melo2a16bf82013-01-24 15:18:54 -0300570 fprintf(stderr, "cannot handle %s internally", cmd);
571 goto out;
Ingo Molnar07800602009-04-20 15:00:56 +0200572 }
Arnaldo Carvalho de Melob52bc232013-09-24 11:56:36 -0300573 if (!prefixcmp(cmd, "trace")) {
Arnaldo Carvalho de Melo1b5726222014-05-26 16:02:29 -0300574#ifdef HAVE_LIBAUDIT_SUPPORT
Jiri Olsa99ce8e92014-12-01 20:06:24 +0100575 set_buildid_dir(NULL);
Arnaldo Carvalho de Melob52bc232013-09-24 11:56:36 -0300576 setup_path();
577 argv[0] = "trace";
578 return cmd_trace(argc, argv, NULL);
Arnaldo Carvalho de Melo1b5726222014-05-26 16:02:29 -0300579#else
580 fprintf(stderr,
581 "trace command not available: missing audit-libs devel package at build time.\n");
582 goto out;
Arnaldo Carvalho de Melob52bc232013-09-24 11:56:36 -0300583#endif
Arnaldo Carvalho de Melo1b5726222014-05-26 16:02:29 -0300584 }
Ingo Molnar07800602009-04-20 15:00:56 +0200585 /* Look for flags.. */
586 argv++;
587 argc--;
588 handle_options(&argv, &argc, NULL);
589 commit_pager_choice();
Jiri Olsa99ce8e92014-12-01 20:06:24 +0100590 set_buildid_dir(NULL);
Stephane Eranian45de34b2010-06-01 21:25:01 +0200591
Ingo Molnar07800602009-04-20 15:00:56 +0200592 if (argc > 0) {
593 if (!prefixcmp(argv[0], "--"))
594 argv[0] += 2;
595 } else {
596 /* The user didn't specify a command; give them help */
Ingo Molnar502fc5c2009-03-13 03:20:49 +0100597 printf("\n usage: %s\n\n", perf_usage_string);
Ingo Molnar07800602009-04-20 15:00:56 +0200598 list_common_cmds_help();
Ingo Molnar502fc5c2009-03-13 03:20:49 +0100599 printf("\n %s\n\n", perf_more_info_string);
Arnaldo Carvalho de Melo2a16bf82013-01-24 15:18:54 -0300600 goto out;
Ingo Molnar07800602009-04-20 15:00:56 +0200601 }
602 cmd = argv[0];
603
Jiri Olsa52502bf2012-10-31 15:52:47 +0100604 test_attr__init();
605
Ingo Molnar07800602009-04-20 15:00:56 +0200606 /*
607 * We use PATH to find perf commands, but we prepend some higher
Uwe Kleine-König659431f2010-01-18 16:02:48 +0100608 * precedence paths: the "--exec-path" option, the PERF_EXEC_PATH
Ingo Molnar07800602009-04-20 15:00:56 +0200609 * environment, and the $(perfexecdir) from the Makefile at build
610 * time.
611 */
612 setup_path();
Arnaldo Carvalho de Melo3af6e332011-10-13 08:52:46 -0300613 /*
614 * Block SIGWINCH notifications so that the thread that wants it can
615 * unblock and get syscalls like select interrupted instead of waiting
616 * forever while the signal goes to some other non interested thread.
617 */
618 pthread__block_sigwinch();
Ingo Molnar07800602009-04-20 15:00:56 +0200619
Jiri Olsadd629cc2016-02-14 17:03:45 +0100620 perf_debug_setup();
621
Ingo Molnar07800602009-04-20 15:00:56 +0200622 while (1) {
Thiago Farina4c574152010-01-27 21:05:55 -0200623 static int done_help;
Arnaldo Carvalho de Melob5ded712013-03-27 11:00:07 -0300624 int was_alias = run_argv(&argc, &argv);
Ingo Molnar8035e422009-06-06 15:19:13 +0200625
Ingo Molnar07800602009-04-20 15:00:56 +0200626 if (errno != ENOENT)
627 break;
Ingo Molnar8035e422009-06-06 15:19:13 +0200628
Ingo Molnar07800602009-04-20 15:00:56 +0200629 if (was_alias) {
630 fprintf(stderr, "Expansion of alias '%s' failed; "
631 "'%s' is not a perf-command\n",
632 cmd, argv[0]);
Arnaldo Carvalho de Melo2a16bf82013-01-24 15:18:54 -0300633 goto out;
Ingo Molnar07800602009-04-20 15:00:56 +0200634 }
635 if (!done_help) {
636 cmd = argv[0] = help_unknown_cmd(cmd);
637 done_help = 1;
638 } else
639 break;
640 }
641
642 fprintf(stderr, "Failed to run command '%s': %s\n",
Masami Hiramatsub2348e12014-08-14 02:22:32 +0000643 cmd, strerror_r(errno, sbuf, sizeof(sbuf)));
Arnaldo Carvalho de Melo2a16bf82013-01-24 15:18:54 -0300644out:
Ingo Molnar07800602009-04-20 15:00:56 +0200645 return 1;
646}