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1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
4ea42b18 MH |
2 | /* |
3 | * builtin-probe.c | |
4 | * | |
5 | * Builtin probe command: Set up probe events by C expression | |
6 | * | |
7 | * Written by Masami Hiramatsu <mhiramat@redhat.com> | |
4ea42b18 | 8 | */ |
4ea42b18 MH |
9 | #include <sys/utsname.h> |
10 | #include <sys/types.h> | |
11 | #include <sys/stat.h> | |
12 | #include <fcntl.h> | |
13 | #include <errno.h> | |
14 | #include <stdio.h> | |
15 | #include <unistd.h> | |
16 | #include <stdlib.h> | |
17 | #include <string.h> | |
18 | ||
4ea42b18 | 19 | #include "builtin.h" |
40f3b2d2 | 20 | #include "namespaces.h" |
b1d1b094 | 21 | #include "util/build-id.h" |
fa28244d | 22 | #include "util/strlist.h" |
bd09d7b5 | 23 | #include "util/strfilter.h" |
afce8c48 | 24 | #include "util/symbol_conf.h" |
89c69c0e | 25 | #include "util/debug.h" |
4b6ab94e | 26 | #include <subcmd/parse-options.h> |
4ea42b18 | 27 | #include "util/probe-finder.h" |
50656eec | 28 | #include "util/probe-event.h" |
e607f142 | 29 | #include "util/probe-file.h" |
8520a98d | 30 | #include <linux/string.h> |
7f7c536f | 31 | #include <linux/zalloc.h> |
4ea42b18 | 32 | |
bd09d7b5 | 33 | #define DEFAULT_VAR_FILTER "!__k???tab_* & !__crc_*" |
3c42258c | 34 | #define DEFAULT_FUNC_FILTER "!_*" |
1f3736c9 | 35 | #define DEFAULT_LIST_FILTER "*" |
4ea42b18 MH |
36 | |
37 | /* Session management structure */ | |
38 | static struct { | |
b1019d5e | 39 | int command; /* Command short_name */ |
fac13fd5 | 40 | bool list_events; |
225466f1 | 41 | bool uprobes; |
5e17b28f | 42 | bool quiet; |
8cb0aa4c | 43 | bool target_used; |
4235b045 MH |
44 | int nevents; |
45 | struct perf_probe_event events[MAX_PROBES]; | |
631c9def | 46 | struct line_range line_range; |
e53b00d3 | 47 | char *target; |
bd09d7b5 | 48 | struct strfilter *filter; |
544abd44 | 49 | struct nsinfo *nsi; |
12a1fadb | 50 | } params; |
4ea42b18 | 51 | |
253977b0 | 52 | /* Parse an event definition. Note that any error must die. */ |
146a1439 | 53 | static int parse_probe_event(const char *str) |
4ea42b18 | 54 | { |
4235b045 | 55 | struct perf_probe_event *pev = ¶ms.events[params.nevents]; |
146a1439 | 56 | int ret; |
4ea42b18 | 57 | |
4235b045 | 58 | pr_debug("probe-definition(%d): %s\n", params.nevents, str); |
8a7ddad8 ACM |
59 | if (++params.nevents == MAX_PROBES) { |
60 | pr_err("Too many probes (> %d) were specified.", MAX_PROBES); | |
61 | return -1; | |
62 | } | |
4ea42b18 | 63 | |
225466f1 | 64 | pev->uprobes = params.uprobes; |
7afb3fab MH |
65 | if (params.target) { |
66 | pev->target = strdup(params.target); | |
67 | if (!pev->target) | |
68 | return -ENOMEM; | |
8cb0aa4c | 69 | params.target_used = true; |
7afb3fab | 70 | } |
225466f1 | 71 | |
362379aa | 72 | pev->nsi = nsinfo__get(params.nsi); |
544abd44 | 73 | |
4235b045 | 74 | /* Parse a perf-probe command into event */ |
146a1439 | 75 | ret = parse_perf_probe_command(str, pev); |
4235b045 | 76 | pr_debug("%d arguments\n", pev->nargs); |
146a1439 MH |
77 | |
78 | return ret; | |
46ab4926 MH |
79 | } |
80 | ||
b6a89643 MH |
81 | static int params_add_filter(const char *str) |
82 | { | |
83 | const char *err = NULL; | |
84 | int ret = 0; | |
85 | ||
86 | pr_debug2("Add filter: %s\n", str); | |
87 | if (!params.filter) { | |
88 | params.filter = strfilter__new(str, &err); | |
89 | if (!params.filter) | |
90 | ret = err ? -EINVAL : -ENOMEM; | |
91 | } else | |
92 | ret = strfilter__or(params.filter, str, &err); | |
93 | ||
94 | if (ret == -EINVAL) { | |
95 | pr_err("Filter parse error at %td.\n", err - str + 1); | |
96 | pr_err("Source: \"%s\"\n", str); | |
97 | pr_err(" %*c\n", (int)(err - str + 1), '^'); | |
98 | } | |
99 | ||
100 | return ret; | |
101 | } | |
102 | ||
73eff9f5 SD |
103 | static int set_target(const char *ptr) |
104 | { | |
105 | int found = 0; | |
106 | const char *buf; | |
107 | ||
108 | /* | |
109 | * The first argument after options can be an absolute path | |
110 | * to an executable / library or kernel module. | |
111 | * | |
112 | * TODO: Support relative path, and $PATH, $LD_LIBRARY_PATH, | |
113 | * short module name. | |
114 | */ | |
115 | if (!params.target && ptr && *ptr == '/') { | |
e53b00d3 MH |
116 | params.target = strdup(ptr); |
117 | if (!params.target) | |
118 | return -ENOMEM; | |
8cb0aa4c | 119 | params.target_used = false; |
e53b00d3 | 120 | |
73eff9f5 SD |
121 | found = 1; |
122 | buf = ptr + (strlen(ptr) - 3); | |
123 | ||
124 | if (strcmp(buf, ".ko")) | |
125 | params.uprobes = true; | |
126 | ||
127 | } | |
128 | ||
129 | return found; | |
130 | } | |
131 | ||
146a1439 | 132 | static int parse_probe_event_argv(int argc, const char **argv) |
d1bde3f7 | 133 | { |
73eff9f5 | 134 | int i, len, ret, found_target; |
d1bde3f7 MH |
135 | char *buf; |
136 | ||
73eff9f5 | 137 | found_target = set_target(argv[0]); |
e53b00d3 MH |
138 | if (found_target < 0) |
139 | return found_target; | |
140 | ||
73eff9f5 SD |
141 | if (found_target && argc == 1) |
142 | return 0; | |
143 | ||
d1bde3f7 MH |
144 | /* Bind up rest arguments */ |
145 | len = 0; | |
73eff9f5 SD |
146 | for (i = 0; i < argc; i++) { |
147 | if (i == 0 && found_target) | |
148 | continue; | |
149 | ||
d1bde3f7 | 150 | len += strlen(argv[i]) + 1; |
73eff9f5 | 151 | } |
8a7ddad8 ACM |
152 | buf = zalloc(len + 1); |
153 | if (buf == NULL) | |
154 | return -ENOMEM; | |
d1bde3f7 | 155 | len = 0; |
73eff9f5 SD |
156 | for (i = 0; i < argc; i++) { |
157 | if (i == 0 && found_target) | |
158 | continue; | |
159 | ||
d1bde3f7 | 160 | len += sprintf(&buf[len], "%s ", argv[i]); |
73eff9f5 | 161 | } |
146a1439 | 162 | ret = parse_probe_event(buf); |
d1bde3f7 | 163 | free(buf); |
146a1439 | 164 | return ret; |
d1bde3f7 MH |
165 | } |
166 | ||
225466f1 | 167 | static int opt_set_target(const struct option *opt, const char *str, |
1d037ca1 | 168 | int unset __maybe_unused) |
225466f1 SD |
169 | { |
170 | int ret = -ENOENT; | |
8a613d40 | 171 | char *tmp; |
225466f1 | 172 | |
7afb3fab | 173 | if (str) { |
225466f1 SD |
174 | if (!strcmp(opt->long_name, "exec")) |
175 | params.uprobes = true; | |
225466f1 SD |
176 | else if (!strcmp(opt->long_name, "module")) |
177 | params.uprobes = false; | |
225466f1 SD |
178 | else |
179 | return ret; | |
180 | ||
8a613d40 MH |
181 | /* Expand given path to absolute path, except for modulename */ |
182 | if (params.uprobes || strchr(str, '/')) { | |
544abd44 | 183 | tmp = nsinfo__realpath(str, params.nsi); |
8a613d40 MH |
184 | if (!tmp) { |
185 | pr_warning("Failed to get the absolute path of %s: %m\n", str); | |
186 | return ret; | |
187 | } | |
188 | } else { | |
189 | tmp = strdup(str); | |
190 | if (!tmp) | |
191 | return -ENOMEM; | |
192 | } | |
7afb3fab | 193 | free(params.target); |
8a613d40 | 194 | params.target = tmp; |
8cb0aa4c | 195 | params.target_used = false; |
225466f1 SD |
196 | ret = 0; |
197 | } | |
198 | ||
199 | return ret; | |
200 | } | |
201 | ||
544abd44 KJ |
202 | static int opt_set_target_ns(const struct option *opt __maybe_unused, |
203 | const char *str, int unset __maybe_unused) | |
204 | { | |
205 | int ret = -ENOENT; | |
206 | pid_t ns_pid; | |
207 | struct nsinfo *nsip; | |
208 | ||
209 | if (str) { | |
210 | errno = 0; | |
211 | ns_pid = (pid_t)strtol(str, NULL, 10); | |
212 | if (errno != 0) { | |
213 | ret = -errno; | |
214 | pr_warning("Failed to parse %s as a pid: %s\n", str, | |
215 | strerror(errno)); | |
216 | return ret; | |
217 | } | |
218 | nsip = nsinfo__new(ns_pid); | |
219 | if (nsip && nsip->need_setns) | |
220 | params.nsi = nsinfo__get(nsip); | |
221 | nsinfo__put(nsip); | |
222 | ||
223 | ret = 0; | |
224 | } | |
225 | ||
226 | return ret; | |
227 | } | |
228 | ||
229 | ||
b1019d5e MH |
230 | /* Command option callbacks */ |
231 | ||
89fe808a | 232 | #ifdef HAVE_DWARF_SUPPORT |
b1019d5e | 233 | static int opt_show_lines(const struct option *opt, |
1d037ca1 | 234 | const char *str, int unset __maybe_unused) |
0eda7385 | 235 | { |
146a1439 MH |
236 | int ret = 0; |
237 | ||
13e27d76 MH |
238 | if (!str) |
239 | return 0; | |
240 | ||
b1019d5e | 241 | if (params.command == 'L') { |
13e27d76 MH |
242 | pr_warning("Warning: more than one --line options are" |
243 | " detected. Only the first one is valid.\n"); | |
244 | return 0; | |
245 | } | |
246 | ||
b1019d5e | 247 | params.command = opt->short_name; |
13e27d76 | 248 | ret = parse_line_range_desc(str, ¶ms.line_range); |
146a1439 MH |
249 | |
250 | return ret; | |
0eda7385 | 251 | } |
cf6eb489 | 252 | |
b1019d5e | 253 | static int opt_show_vars(const struct option *opt, |
1d037ca1 | 254 | const char *str, int unset __maybe_unused) |
cf6eb489 MH |
255 | { |
256 | struct perf_probe_event *pev = ¶ms.events[params.nevents]; | |
257 | int ret; | |
258 | ||
259 | if (!str) | |
260 | return 0; | |
261 | ||
262 | ret = parse_probe_event(str); | |
263 | if (!ret && pev->nargs != 0) { | |
264 | pr_err(" Error: '--vars' doesn't accept arguments.\n"); | |
265 | return -EINVAL; | |
266 | } | |
b1019d5e | 267 | params.command = opt->short_name; |
cf6eb489 MH |
268 | |
269 | return ret; | |
270 | } | |
48e1cab1 WN |
271 | #else |
272 | # define opt_show_lines NULL | |
273 | # define opt_show_vars NULL | |
3c42258c | 274 | #endif |
b1019d5e MH |
275 | static int opt_add_probe_event(const struct option *opt, |
276 | const char *str, int unset __maybe_unused) | |
277 | { | |
278 | if (str) { | |
279 | params.command = opt->short_name; | |
280 | return parse_probe_event(str); | |
281 | } | |
282 | ||
283 | return 0; | |
284 | } | |
285 | ||
286 | static int opt_set_filter_with_command(const struct option *opt, | |
287 | const char *str, int unset) | |
9f7811d0 MH |
288 | { |
289 | if (!unset) | |
b1019d5e | 290 | params.command = opt->short_name; |
9f7811d0 MH |
291 | |
292 | if (str) | |
293 | return params_add_filter(str); | |
294 | ||
295 | return 0; | |
296 | } | |
bd09d7b5 | 297 | |
1d037ca1 IT |
298 | static int opt_set_filter(const struct option *opt __maybe_unused, |
299 | const char *str, int unset __maybe_unused) | |
bd09d7b5 | 300 | { |
b6a89643 MH |
301 | if (str) |
302 | return params_add_filter(str); | |
bd09d7b5 | 303 | |
b6a89643 | 304 | return 0; |
bd09d7b5 | 305 | } |
4ea42b18 | 306 | |
5a62257a | 307 | static int init_params(void) |
e53b00d3 | 308 | { |
5a62257a | 309 | return line_range__init(¶ms.line_range); |
e53b00d3 MH |
310 | } |
311 | ||
312 | static void cleanup_params(void) | |
313 | { | |
314 | int i; | |
315 | ||
316 | for (i = 0; i < params.nevents; i++) | |
317 | clear_perf_probe_event(params.events + i); | |
e53b00d3 MH |
318 | line_range__clear(¶ms.line_range); |
319 | free(params.target); | |
200802a4 | 320 | strfilter__delete(params.filter); |
544abd44 | 321 | nsinfo__put(params.nsi); |
e53b00d3 MH |
322 | memset(¶ms, 0, sizeof(params)); |
323 | } | |
324 | ||
b4bf1130 MH |
325 | static void pr_err_with_code(const char *msg, int err) |
326 | { | |
5f03cba4 MH |
327 | char sbuf[STRERR_BUFSIZE]; |
328 | ||
b4bf1130 | 329 | pr_err("%s", msg); |
5f03cba4 | 330 | pr_debug(" Reason: %s (Code: %d)", |
c8b5f2c9 | 331 | str_error_r(-err, sbuf, sizeof(sbuf)), err); |
b4bf1130 MH |
332 | pr_err("\n"); |
333 | } | |
334 | ||
b02137cc NK |
335 | static int perf_add_probe_events(struct perf_probe_event *pevs, int npevs) |
336 | { | |
337 | int ret; | |
338 | int i, k; | |
339 | const char *event = NULL, *group = NULL; | |
340 | ||
9bae1e8c NK |
341 | ret = init_probe_symbol_maps(pevs->uprobes); |
342 | if (ret < 0) | |
343 | return ret; | |
344 | ||
b02137cc NK |
345 | ret = convert_perf_probe_events(pevs, npevs); |
346 | if (ret < 0) | |
347 | goto out_cleanup; | |
348 | ||
1c20b1d1 MH |
349 | if (params.command == 'D') { /* it shows definition */ |
350 | ret = show_probe_trace_events(pevs, npevs); | |
351 | goto out_cleanup; | |
352 | } | |
353 | ||
b02137cc NK |
354 | ret = apply_perf_probe_events(pevs, npevs); |
355 | if (ret < 0) | |
356 | goto out_cleanup; | |
357 | ||
358 | for (i = k = 0; i < npevs; i++) | |
359 | k += pevs[i].ntevs; | |
360 | ||
361 | pr_info("Added new event%s\n", (k > 1) ? "s:" : ":"); | |
362 | for (i = 0; i < npevs; i++) { | |
363 | struct perf_probe_event *pev = &pevs[i]; | |
364 | ||
365 | for (k = 0; k < pev->ntevs; k++) { | |
366 | struct probe_trace_event *tev = &pev->tevs[k]; | |
367 | ||
368 | /* We use tev's name for showing new events */ | |
369 | show_perf_probe_event(tev->group, tev->event, pev, | |
370 | tev->point.module, false); | |
371 | ||
372 | /* Save the last valid name */ | |
373 | event = tev->event; | |
374 | group = tev->group; | |
375 | } | |
376 | } | |
377 | ||
378 | /* Note that it is possible to skip all events because of blacklist */ | |
379 | if (event) { | |
380 | /* Show how to use the event. */ | |
381 | pr_info("\nYou can now use it in all perf tools, such as:\n\n"); | |
382 | pr_info("\tperf record -e %s:%s -aR sleep 1\n\n", group, event); | |
383 | } | |
384 | ||
385 | out_cleanup: | |
386 | cleanup_perf_probe_events(pevs, npevs); | |
9bae1e8c | 387 | exit_probe_symbol_maps(); |
b02137cc NK |
388 | return ret; |
389 | } | |
390 | ||
4a0f65c1 MH |
391 | static int del_perf_probe_caches(struct strfilter *filter) |
392 | { | |
393 | struct probe_cache *cache; | |
394 | struct strlist *bidlist; | |
395 | struct str_node *nd; | |
396 | int ret; | |
397 | ||
c3492a3a | 398 | bidlist = build_id_cache__list_all(false); |
4a0f65c1 MH |
399 | if (!bidlist) { |
400 | ret = -errno; | |
401 | pr_debug("Failed to get buildids: %d\n", ret); | |
402 | return ret ?: -ENOMEM; | |
403 | } | |
404 | ||
405 | strlist__for_each_entry(nd, bidlist) { | |
f045b8c4 | 406 | cache = probe_cache__new(nd->s, NULL); |
4a0f65c1 MH |
407 | if (!cache) |
408 | continue; | |
409 | if (probe_cache__filter_purge(cache, filter) < 0 || | |
410 | probe_cache__commit(cache) < 0) | |
411 | pr_warning("Failed to remove entries for %s\n", nd->s); | |
412 | probe_cache__delete(cache); | |
413 | } | |
414 | return 0; | |
415 | } | |
416 | ||
e607f142 NK |
417 | static int perf_del_probe_events(struct strfilter *filter) |
418 | { | |
419 | int ret, ret2, ufd = -1, kfd = -1; | |
420 | char *str = strfilter__string(filter); | |
421 | struct strlist *klist = NULL, *ulist = NULL; | |
422 | struct str_node *ent; | |
423 | ||
424 | if (!str) | |
425 | return -EINVAL; | |
426 | ||
427 | pr_debug("Delete filter: \'%s\'\n", str); | |
428 | ||
4a0f65c1 MH |
429 | if (probe_conf.cache) |
430 | return del_perf_probe_caches(filter); | |
431 | ||
e607f142 NK |
432 | /* Get current event names */ |
433 | ret = probe_file__open_both(&kfd, &ufd, PF_FL_RW); | |
434 | if (ret < 0) | |
435 | goto out; | |
436 | ||
437 | klist = strlist__new(NULL, NULL); | |
0fb18553 MH |
438 | ulist = strlist__new(NULL, NULL); |
439 | if (!klist || !ulist) { | |
440 | ret = -ENOMEM; | |
441 | goto out; | |
442 | } | |
e607f142 NK |
443 | |
444 | ret = probe_file__get_events(kfd, filter, klist); | |
445 | if (ret == 0) { | |
602a1f4d | 446 | strlist__for_each_entry(ent, klist) |
e607f142 NK |
447 | pr_info("Removed event: %s\n", ent->s); |
448 | ||
449 | ret = probe_file__del_strlist(kfd, klist); | |
450 | if (ret < 0) | |
451 | goto error; | |
452 | } | |
453 | ||
454 | ret2 = probe_file__get_events(ufd, filter, ulist); | |
455 | if (ret2 == 0) { | |
602a1f4d | 456 | strlist__for_each_entry(ent, ulist) |
e607f142 NK |
457 | pr_info("Removed event: %s\n", ent->s); |
458 | ||
459 | ret2 = probe_file__del_strlist(ufd, ulist); | |
460 | if (ret2 < 0) | |
461 | goto error; | |
462 | } | |
463 | ||
464 | if (ret == -ENOENT && ret2 == -ENOENT) | |
70946723 KW |
465 | pr_warning("\"%s\" does not hit any event.\n", str); |
466 | else | |
467 | ret = 0; | |
e607f142 NK |
468 | |
469 | error: | |
470 | if (kfd >= 0) | |
471 | close(kfd); | |
472 | if (ufd >= 0) | |
473 | close(ufd); | |
474 | out: | |
475 | strlist__delete(klist); | |
476 | strlist__delete(ulist); | |
477 | free(str); | |
478 | ||
479 | return ret; | |
480 | } | |
481 | ||
1c20b1d1 MH |
482 | #ifdef HAVE_DWARF_SUPPORT |
483 | #define PROBEDEF_STR \ | |
484 | "[EVENT=]FUNC[@SRC][+OFF|%return|:RL|;PT]|SRC:AL|SRC;PT [[NAME=]ARG ...]" | |
485 | #else | |
486 | #define PROBEDEF_STR "[EVENT=]FUNC[+OFF|%return] [[NAME=]ARG ...]" | |
487 | #endif | |
488 | ||
489 | ||
e53b00d3 | 490 | static int |
b0ad8ea6 | 491 | __cmd_probe(int argc, const char **argv) |
11c4e4a3 ACM |
492 | { |
493 | const char * const probe_usage[] = { | |
494 | "perf probe [<options>] 'PROBEDEF' ['PROBEDEF' ...]", | |
495 | "perf probe [<options>] --add 'PROBEDEF' [--add 'PROBEDEF' ...]", | |
496 | "perf probe [<options>] --del '[GROUP:]EVENT' ...", | |
b6a89643 | 497 | "perf probe --list [GROUP:]EVENT ...", |
89fe808a | 498 | #ifdef HAVE_DWARF_SUPPORT |
11c4e4a3 ACM |
499 | "perf probe [<options>] --line 'LINEDESC'", |
500 | "perf probe [<options>] --vars 'PROBEPOINT'", | |
f3ab481c | 501 | #endif |
b3ac032b | 502 | "perf probe [<options>] --funcs", |
11c4e4a3 | 503 | NULL |
b6a89643 | 504 | }; |
13dcbbc0 | 505 | struct option options[] = { |
c0555642 | 506 | OPT_INCR('v', "verbose", &verbose, |
89c69c0e | 507 | "be more verbose (show parsed arguments, etc)"), |
5e17b28f | 508 | OPT_BOOLEAN('q', "quiet", ¶ms.quiet, |
0a95160e | 509 | "be quiet (do not show any messages)"), |
b6a89643 | 510 | OPT_CALLBACK_DEFAULT('l', "list", NULL, "[GROUP:]EVENT", |
b1019d5e MH |
511 | "list up probe events", |
512 | opt_set_filter_with_command, DEFAULT_LIST_FILTER), | |
fa28244d | 513 | OPT_CALLBACK('d', "del", NULL, "[GROUP:]EVENT", "delete a probe event.", |
b1019d5e | 514 | opt_set_filter_with_command), |
1c20b1d1 | 515 | OPT_CALLBACK('a', "add", NULL, PROBEDEF_STR, |
4ea42b18 | 516 | "probe point definition, where\n" |
af663d75 MH |
517 | "\t\tGROUP:\tGroup name (optional)\n" |
518 | "\t\tEVENT:\tEvent name\n" | |
4ea42b18 | 519 | "\t\tFUNC:\tFunction name\n" |
2a9c8c36 | 520 | "\t\tOFF:\tOffset from function entry (in byte)\n" |
253977b0 | 521 | "\t\t%return:\tPut the probe at function return\n" |
89fe808a | 522 | #ifdef HAVE_DWARF_SUPPORT |
4ea42b18 | 523 | "\t\tSRC:\tSource code path\n" |
2a9c8c36 MH |
524 | "\t\tRL:\tRelative line number from function entry.\n" |
525 | "\t\tAL:\tAbsolute line number in file.\n" | |
526 | "\t\tPT:\tLazy expression of line code.\n" | |
4ea42b18 | 527 | "\t\tARG:\tProbe argument (local variable name or\n" |
50656eec | 528 | "\t\t\tkprobe-tracer argument format.)\n", |
4b4da7f7 MH |
529 | #else |
530 | "\t\tARG:\tProbe argument (kprobe-tracer argument format.)\n", | |
531 | #endif | |
253977b0 | 532 | opt_add_probe_event), |
1c20b1d1 MH |
533 | OPT_CALLBACK('D', "definition", NULL, PROBEDEF_STR, |
534 | "Show trace event definition of given traceevent for k/uprobe_events.", | |
535 | opt_add_probe_event), | |
ddb2f58f | 536 | OPT_BOOLEAN('f', "force", &probe_conf.force_add, "forcibly add events" |
d761b08b | 537 | " with existing name"), |
631c9def | 538 | OPT_CALLBACK('L', "line", NULL, |
085ea739 | 539 | "FUNC[:RLN[+NUM|-RLN2]]|SRC:ALN[+NUM|-ALN2]", |
631c9def | 540 | "Show source code lines.", opt_show_lines), |
cf6eb489 MH |
541 | OPT_CALLBACK('V', "vars", NULL, |
542 | "FUNC[@SRC][+OFF|%return|:RL|;PT]|SRC:AL|SRC;PT", | |
543 | "Show accessible variables on PROBEDEF", opt_show_vars), | |
ddb2f58f | 544 | OPT_BOOLEAN('\0', "externs", &probe_conf.show_ext_vars, |
fb8c5a56 | 545 | "Show external variables too (with --vars only)"), |
349e8d26 HK |
546 | OPT_BOOLEAN('\0', "range", &probe_conf.show_location_range, |
547 | "Show variables location range in scope (with --vars only)"), | |
4b4da7f7 MH |
548 | OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name, |
549 | "file", "vmlinux pathname"), | |
9ed7e1b8 CD |
550 | OPT_STRING('s', "source", &symbol_conf.source_prefix, |
551 | "directory", "path to kernel source"), | |
6cfd1f68 MH |
552 | OPT_BOOLEAN('\0', "no-inlines", &probe_conf.no_inlines, |
553 | "Don't search inlined functions"), | |
f4d7da49 | 554 | OPT__DRY_RUN(&probe_event_dry_run), |
ddb2f58f | 555 | OPT_INTEGER('\0', "max-probes", &probe_conf.max_probes, |
ef4a3565 | 556 | "Set how many probe points can be found for a probe."), |
9f7811d0 MH |
557 | OPT_CALLBACK_DEFAULT('F', "funcs", NULL, "[FILTER]", |
558 | "Show potential probe-able functions.", | |
b1019d5e | 559 | opt_set_filter_with_command, DEFAULT_FUNC_FILTER), |
3c42258c MH |
560 | OPT_CALLBACK('\0', "filter", NULL, |
561 | "[!]FILTER", "Set a filter (with --vars/funcs only)\n" | |
562 | "\t\t\t(default: \"" DEFAULT_VAR_FILTER "\" for --vars,\n" | |
563 | "\t\t\t \"" DEFAULT_FUNC_FILTER "\" for --funcs)", | |
564 | opt_set_filter), | |
225466f1 SD |
565 | OPT_CALLBACK('x', "exec", NULL, "executable|path", |
566 | "target executable name or path", opt_set_target), | |
1a8ac29c MH |
567 | OPT_CALLBACK('m', "module", NULL, "modname|path", |
568 | "target module name (for online) or path (for offline)", | |
569 | opt_set_target), | |
35e17b24 | 570 | OPT_BOOLEAN(0, "demangle", &symbol_conf.demangle, |
4cdcc33d | 571 | "Enable symbol demangling"), |
763122ad AK |
572 | OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel, |
573 | "Enable kernel symbol demangling"), | |
2fd457a3 | 574 | OPT_BOOLEAN(0, "cache", &probe_conf.cache, "Manipulate probe cache"), |
d5c3a937 UKK |
575 | OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory", |
576 | "Look for files with symbols relative to this directory"), | |
544abd44 KJ |
577 | OPT_CALLBACK(0, "target-ns", NULL, "pid", |
578 | "target pid for namespace contexts", opt_set_target_ns), | |
4ea42b18 | 579 | OPT_END() |
11c4e4a3 | 580 | }; |
146a1439 MH |
581 | int ret; |
582 | ||
13dcbbc0 NK |
583 | set_option_flag(options, 'a', "add", PARSE_OPT_EXCLUSIVE); |
584 | set_option_flag(options, 'd', "del", PARSE_OPT_EXCLUSIVE); | |
1c20b1d1 | 585 | set_option_flag(options, 'D', "definition", PARSE_OPT_EXCLUSIVE); |
13dcbbc0 NK |
586 | set_option_flag(options, 'l', "list", PARSE_OPT_EXCLUSIVE); |
587 | #ifdef HAVE_DWARF_SUPPORT | |
588 | set_option_flag(options, 'L', "line", PARSE_OPT_EXCLUSIVE); | |
589 | set_option_flag(options, 'V', "vars", PARSE_OPT_EXCLUSIVE); | |
48e1cab1 WN |
590 | #else |
591 | # define set_nobuild(s, l, c) set_option_nobuild(options, s, l, "NO_DWARF=1", c) | |
592 | set_nobuild('L', "line", false); | |
593 | set_nobuild('V', "vars", false); | |
594 | set_nobuild('\0', "externs", false); | |
595 | set_nobuild('\0', "range", false); | |
596 | set_nobuild('k', "vmlinux", true); | |
597 | set_nobuild('s', "source", true); | |
598 | set_nobuild('\0', "no-inlines", true); | |
599 | # undef set_nobuild | |
13dcbbc0 | 600 | #endif |
b3ac032b | 601 | set_option_flag(options, 'F', "funcs", PARSE_OPT_EXCLUSIVE); |
13dcbbc0 | 602 | |
4ea42b18 | 603 | argc = parse_options(argc, argv, options, probe_usage, |
46ab4926 | 604 | PARSE_OPT_STOP_AT_NON_OPTION); |
ce11a603 MH |
605 | if (argc > 0) { |
606 | if (strcmp(argv[0], "-") == 0) { | |
c7118369 NK |
607 | usage_with_options_msg(probe_usage, options, |
608 | "'-' is not supported.\n"); | |
ce11a603 | 609 | } |
b1019d5e | 610 | if (params.command && params.command != 'a') { |
c7118369 NK |
611 | usage_with_options_msg(probe_usage, options, |
612 | "another command except --add is set.\n"); | |
b1019d5e | 613 | } |
146a1439 MH |
614 | ret = parse_probe_event_argv(argc, argv); |
615 | if (ret < 0) { | |
b4bf1130 | 616 | pr_err_with_code(" Error: Command Parse Error.", ret); |
146a1439 MH |
617 | return ret; |
618 | } | |
b1019d5e | 619 | params.command = 'a'; |
ce11a603 | 620 | } |
46ab4926 | 621 | |
5e17b28f MH |
622 | if (params.quiet) { |
623 | if (verbose != 0) { | |
624 | pr_err(" Error: -v and -q are exclusive.\n"); | |
625 | return -EINVAL; | |
626 | } | |
627 | verbose = -1; | |
628 | } | |
629 | ||
ddb2f58f MH |
630 | if (probe_conf.max_probes == 0) |
631 | probe_conf.max_probes = MAX_PROBES; | |
ef4a3565 | 632 | |
fd930ff9 FBH |
633 | /* |
634 | * Only consider the user's kernel image path if given. | |
635 | */ | |
636 | symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL); | |
637 | ||
e50243bb MH |
638 | /* |
639 | * Except for --list, --del and --add, other command doesn't depend | |
640 | * nor change running kernel. So if user gives offline vmlinux, | |
641 | * ignore its buildid. | |
642 | */ | |
643 | if (!strchr("lda", params.command) && symbol_conf.vmlinux_name) | |
644 | symbol_conf.ignore_vmlinux_buildid = true; | |
645 | ||
b1019d5e MH |
646 | switch (params.command) { |
647 | case 'l': | |
225466f1 | 648 | if (params.uprobes) { |
c7118369 NK |
649 | pr_err(" Error: Don't use --list with --exec.\n"); |
650 | parse_options_usage(probe_usage, options, "l", true); | |
651 | parse_options_usage(NULL, options, "x", true); | |
652 | return -EINVAL; | |
225466f1 | 653 | } |
b6a89643 | 654 | ret = show_perf_probe_events(params.filter); |
146a1439 | 655 | if (ret < 0) |
b4bf1130 | 656 | pr_err_with_code(" Error: Failed to show event list.", ret); |
146a1439 | 657 | return ret; |
b1019d5e | 658 | case 'F': |
544abd44 KJ |
659 | ret = show_available_funcs(params.target, params.nsi, |
660 | params.filter, params.uprobes); | |
e80711ca | 661 | if (ret < 0) |
b4bf1130 | 662 | pr_err_with_code(" Error: Failed to show functions.", ret); |
e80711ca | 663 | return ret; |
89fe808a | 664 | #ifdef HAVE_DWARF_SUPPORT |
b1019d5e | 665 | case 'L': |
2b394bc4 | 666 | ret = show_line_range(¶ms.line_range, params.target, |
544abd44 | 667 | params.nsi, params.uprobes); |
146a1439 | 668 | if (ret < 0) |
b4bf1130 | 669 | pr_err_with_code(" Error: Failed to show lines.", ret); |
146a1439 | 670 | return ret; |
b1019d5e | 671 | case 'V': |
bd09d7b5 MH |
672 | if (!params.filter) |
673 | params.filter = strfilter__new(DEFAULT_VAR_FILTER, | |
674 | NULL); | |
675 | ||
cf6eb489 | 676 | ret = show_available_vars(params.events, params.nevents, |
ddb2f58f | 677 | params.filter); |
cf6eb489 | 678 | if (ret < 0) |
b4bf1130 | 679 | pr_err_with_code(" Error: Failed to show vars.", ret); |
cf6eb489 | 680 | return ret; |
631c9def | 681 | #endif |
b1019d5e | 682 | case 'd': |
e607f142 | 683 | ret = perf_del_probe_events(params.filter); |
146a1439 | 684 | if (ret < 0) { |
b4bf1130 | 685 | pr_err_with_code(" Error: Failed to delete events.", ret); |
146a1439 MH |
686 | return ret; |
687 | } | |
b1019d5e | 688 | break; |
1c20b1d1 | 689 | case 'D': |
428aff82 MH |
690 | case 'a': |
691 | ||
8cb0aa4c MH |
692 | /* Ensure the last given target is used */ |
693 | if (params.target && !params.target_used) { | |
c7118369 NK |
694 | pr_err(" Error: -x/-m must follow the probe definitions.\n"); |
695 | parse_options_usage(probe_usage, options, "m", true); | |
696 | parse_options_usage(NULL, options, "x", true); | |
697 | return -EINVAL; | |
8cb0aa4c MH |
698 | } |
699 | ||
b02137cc | 700 | ret = perf_add_probe_events(params.events, params.nevents); |
146a1439 | 701 | if (ret < 0) { |
d95daf5a ACM |
702 | |
703 | /* | |
704 | * When perf_add_probe_events() fails it calls | |
705 | * cleanup_perf_probe_events(pevs, npevs), i.e. | |
706 | * cleanup_perf_probe_events(params.events, params.nevents), which | |
707 | * will call clear_perf_probe_event(), so set nevents to zero | |
708 | * to avoid cleanup_params() to call clear_perf_probe_event() again | |
709 | * on the same pevs. | |
710 | */ | |
711 | params.nevents = 0; | |
b4bf1130 | 712 | pr_err_with_code(" Error: Failed to add events.", ret); |
146a1439 MH |
713 | return ret; |
714 | } | |
b1019d5e MH |
715 | break; |
716 | default: | |
717 | usage_with_options(probe_usage, options); | |
146a1439 | 718 | } |
4ea42b18 MH |
719 | return 0; |
720 | } | |
e53b00d3 | 721 | |
b0ad8ea6 | 722 | int cmd_probe(int argc, const char **argv) |
e53b00d3 MH |
723 | { |
724 | int ret; | |
725 | ||
5a62257a MH |
726 | ret = init_params(); |
727 | if (!ret) { | |
b0ad8ea6 | 728 | ret = __cmd_probe(argc, argv); |
5a62257a MH |
729 | cleanup_params(); |
730 | } | |
e53b00d3 | 731 | |
9bc9f3b6 | 732 | return ret < 0 ? ret : 0; |
e53b00d3 | 733 | } |