Commit | Line | Data |
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4ea42b18 MH |
1 | /* |
2 | * builtin-probe.c | |
3 | * | |
4 | * Builtin probe command: Set up probe events by C expression | |
5 | * | |
6 | * Written by Masami Hiramatsu <mhiramat@redhat.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
21 | * | |
22 | */ | |
4ea42b18 MH |
23 | #include <sys/utsname.h> |
24 | #include <sys/types.h> | |
25 | #include <sys/stat.h> | |
26 | #include <fcntl.h> | |
27 | #include <errno.h> | |
28 | #include <stdio.h> | |
29 | #include <unistd.h> | |
30 | #include <stdlib.h> | |
31 | #include <string.h> | |
32 | ||
4ea42b18 MH |
33 | #include "perf.h" |
34 | #include "builtin.h" | |
35 | #include "util/util.h" | |
fa28244d | 36 | #include "util/strlist.h" |
bd09d7b5 | 37 | #include "util/strfilter.h" |
e0faa8d3 | 38 | #include "util/symbol.h" |
89c69c0e | 39 | #include "util/debug.h" |
553873e1 | 40 | #include <api/fs/debugfs.h> |
4ea42b18 | 41 | #include "util/parse-options.h" |
4ea42b18 | 42 | #include "util/probe-finder.h" |
50656eec | 43 | #include "util/probe-event.h" |
4ea42b18 | 44 | |
bd09d7b5 | 45 | #define DEFAULT_VAR_FILTER "!__k???tab_* & !__crc_*" |
3c42258c | 46 | #define DEFAULT_FUNC_FILTER "!_*" |
b6a89643 | 47 | #define DEFAULT_LIST_FILTER "*:*" |
4ea42b18 MH |
48 | |
49 | /* Session management structure */ | |
50 | static struct { | |
b1019d5e | 51 | int command; /* Command short_name */ |
fac13fd5 | 52 | bool list_events; |
225466f1 | 53 | bool uprobes; |
5e17b28f | 54 | bool quiet; |
8cb0aa4c | 55 | bool target_used; |
4235b045 MH |
56 | int nevents; |
57 | struct perf_probe_event events[MAX_PROBES]; | |
631c9def | 58 | struct line_range line_range; |
e53b00d3 | 59 | char *target; |
bd09d7b5 | 60 | struct strfilter *filter; |
12a1fadb | 61 | } params; |
4ea42b18 | 62 | |
253977b0 | 63 | /* Parse an event definition. Note that any error must die. */ |
146a1439 | 64 | static int parse_probe_event(const char *str) |
4ea42b18 | 65 | { |
4235b045 | 66 | struct perf_probe_event *pev = ¶ms.events[params.nevents]; |
146a1439 | 67 | int ret; |
4ea42b18 | 68 | |
4235b045 | 69 | pr_debug("probe-definition(%d): %s\n", params.nevents, str); |
8a7ddad8 ACM |
70 | if (++params.nevents == MAX_PROBES) { |
71 | pr_err("Too many probes (> %d) were specified.", MAX_PROBES); | |
72 | return -1; | |
73 | } | |
4ea42b18 | 74 | |
225466f1 | 75 | pev->uprobes = params.uprobes; |
7afb3fab MH |
76 | if (params.target) { |
77 | pev->target = strdup(params.target); | |
78 | if (!pev->target) | |
79 | return -ENOMEM; | |
8cb0aa4c | 80 | params.target_used = true; |
7afb3fab | 81 | } |
225466f1 | 82 | |
4235b045 | 83 | /* Parse a perf-probe command into event */ |
146a1439 | 84 | ret = parse_perf_probe_command(str, pev); |
4235b045 | 85 | pr_debug("%d arguments\n", pev->nargs); |
146a1439 MH |
86 | |
87 | return ret; | |
46ab4926 MH |
88 | } |
89 | ||
b6a89643 MH |
90 | static int params_add_filter(const char *str) |
91 | { | |
92 | const char *err = NULL; | |
93 | int ret = 0; | |
94 | ||
95 | pr_debug2("Add filter: %s\n", str); | |
96 | if (!params.filter) { | |
97 | params.filter = strfilter__new(str, &err); | |
98 | if (!params.filter) | |
99 | ret = err ? -EINVAL : -ENOMEM; | |
100 | } else | |
101 | ret = strfilter__or(params.filter, str, &err); | |
102 | ||
103 | if (ret == -EINVAL) { | |
104 | pr_err("Filter parse error at %td.\n", err - str + 1); | |
105 | pr_err("Source: \"%s\"\n", str); | |
106 | pr_err(" %*c\n", (int)(err - str + 1), '^'); | |
107 | } | |
108 | ||
109 | return ret; | |
110 | } | |
111 | ||
73eff9f5 SD |
112 | static int set_target(const char *ptr) |
113 | { | |
114 | int found = 0; | |
115 | const char *buf; | |
116 | ||
117 | /* | |
118 | * The first argument after options can be an absolute path | |
119 | * to an executable / library or kernel module. | |
120 | * | |
121 | * TODO: Support relative path, and $PATH, $LD_LIBRARY_PATH, | |
122 | * short module name. | |
123 | */ | |
124 | if (!params.target && ptr && *ptr == '/') { | |
e53b00d3 MH |
125 | params.target = strdup(ptr); |
126 | if (!params.target) | |
127 | return -ENOMEM; | |
8cb0aa4c | 128 | params.target_used = false; |
e53b00d3 | 129 | |
73eff9f5 SD |
130 | found = 1; |
131 | buf = ptr + (strlen(ptr) - 3); | |
132 | ||
133 | if (strcmp(buf, ".ko")) | |
134 | params.uprobes = true; | |
135 | ||
136 | } | |
137 | ||
138 | return found; | |
139 | } | |
140 | ||
146a1439 | 141 | static int parse_probe_event_argv(int argc, const char **argv) |
d1bde3f7 | 142 | { |
73eff9f5 | 143 | int i, len, ret, found_target; |
d1bde3f7 MH |
144 | char *buf; |
145 | ||
73eff9f5 | 146 | found_target = set_target(argv[0]); |
e53b00d3 MH |
147 | if (found_target < 0) |
148 | return found_target; | |
149 | ||
73eff9f5 SD |
150 | if (found_target && argc == 1) |
151 | return 0; | |
152 | ||
d1bde3f7 MH |
153 | /* Bind up rest arguments */ |
154 | len = 0; | |
73eff9f5 SD |
155 | for (i = 0; i < argc; i++) { |
156 | if (i == 0 && found_target) | |
157 | continue; | |
158 | ||
d1bde3f7 | 159 | len += strlen(argv[i]) + 1; |
73eff9f5 | 160 | } |
8a7ddad8 ACM |
161 | buf = zalloc(len + 1); |
162 | if (buf == NULL) | |
163 | return -ENOMEM; | |
d1bde3f7 | 164 | len = 0; |
73eff9f5 SD |
165 | for (i = 0; i < argc; i++) { |
166 | if (i == 0 && found_target) | |
167 | continue; | |
168 | ||
d1bde3f7 | 169 | len += sprintf(&buf[len], "%s ", argv[i]); |
73eff9f5 | 170 | } |
146a1439 | 171 | ret = parse_probe_event(buf); |
d1bde3f7 | 172 | free(buf); |
146a1439 | 173 | return ret; |
d1bde3f7 MH |
174 | } |
175 | ||
225466f1 | 176 | static int opt_set_target(const struct option *opt, const char *str, |
1d037ca1 | 177 | int unset __maybe_unused) |
225466f1 SD |
178 | { |
179 | int ret = -ENOENT; | |
8a613d40 | 180 | char *tmp; |
225466f1 | 181 | |
7afb3fab | 182 | if (str) { |
225466f1 SD |
183 | if (!strcmp(opt->long_name, "exec")) |
184 | params.uprobes = true; | |
89fe808a | 185 | #ifdef HAVE_DWARF_SUPPORT |
225466f1 SD |
186 | else if (!strcmp(opt->long_name, "module")) |
187 | params.uprobes = false; | |
188 | #endif | |
189 | else | |
190 | return ret; | |
191 | ||
8a613d40 MH |
192 | /* Expand given path to absolute path, except for modulename */ |
193 | if (params.uprobes || strchr(str, '/')) { | |
194 | tmp = realpath(str, NULL); | |
195 | if (!tmp) { | |
196 | pr_warning("Failed to get the absolute path of %s: %m\n", str); | |
197 | return ret; | |
198 | } | |
199 | } else { | |
200 | tmp = strdup(str); | |
201 | if (!tmp) | |
202 | return -ENOMEM; | |
203 | } | |
7afb3fab | 204 | free(params.target); |
8a613d40 | 205 | params.target = tmp; |
8cb0aa4c | 206 | params.target_used = false; |
225466f1 SD |
207 | ret = 0; |
208 | } | |
209 | ||
210 | return ret; | |
211 | } | |
212 | ||
b1019d5e MH |
213 | /* Command option callbacks */ |
214 | ||
89fe808a | 215 | #ifdef HAVE_DWARF_SUPPORT |
b1019d5e | 216 | static int opt_show_lines(const struct option *opt, |
1d037ca1 | 217 | const char *str, int unset __maybe_unused) |
0eda7385 | 218 | { |
146a1439 MH |
219 | int ret = 0; |
220 | ||
13e27d76 MH |
221 | if (!str) |
222 | return 0; | |
223 | ||
b1019d5e | 224 | if (params.command == 'L') { |
13e27d76 MH |
225 | pr_warning("Warning: more than one --line options are" |
226 | " detected. Only the first one is valid.\n"); | |
227 | return 0; | |
228 | } | |
229 | ||
b1019d5e | 230 | params.command = opt->short_name; |
13e27d76 | 231 | ret = parse_line_range_desc(str, ¶ms.line_range); |
146a1439 MH |
232 | |
233 | return ret; | |
0eda7385 | 234 | } |
cf6eb489 | 235 | |
b1019d5e | 236 | static int opt_show_vars(const struct option *opt, |
1d037ca1 | 237 | const char *str, int unset __maybe_unused) |
cf6eb489 MH |
238 | { |
239 | struct perf_probe_event *pev = ¶ms.events[params.nevents]; | |
240 | int ret; | |
241 | ||
242 | if (!str) | |
243 | return 0; | |
244 | ||
245 | ret = parse_probe_event(str); | |
246 | if (!ret && pev->nargs != 0) { | |
247 | pr_err(" Error: '--vars' doesn't accept arguments.\n"); | |
248 | return -EINVAL; | |
249 | } | |
b1019d5e | 250 | params.command = opt->short_name; |
cf6eb489 MH |
251 | |
252 | return ret; | |
253 | } | |
3c42258c | 254 | #endif |
b1019d5e MH |
255 | static int opt_add_probe_event(const struct option *opt, |
256 | const char *str, int unset __maybe_unused) | |
257 | { | |
258 | if (str) { | |
259 | params.command = opt->short_name; | |
260 | return parse_probe_event(str); | |
261 | } | |
262 | ||
263 | return 0; | |
264 | } | |
265 | ||
266 | static int opt_set_filter_with_command(const struct option *opt, | |
267 | const char *str, int unset) | |
9f7811d0 MH |
268 | { |
269 | if (!unset) | |
b1019d5e | 270 | params.command = opt->short_name; |
9f7811d0 MH |
271 | |
272 | if (str) | |
273 | return params_add_filter(str); | |
274 | ||
275 | return 0; | |
276 | } | |
bd09d7b5 | 277 | |
1d037ca1 IT |
278 | static int opt_set_filter(const struct option *opt __maybe_unused, |
279 | const char *str, int unset __maybe_unused) | |
bd09d7b5 | 280 | { |
b6a89643 MH |
281 | if (str) |
282 | return params_add_filter(str); | |
bd09d7b5 | 283 | |
b6a89643 | 284 | return 0; |
bd09d7b5 | 285 | } |
4ea42b18 | 286 | |
5a62257a | 287 | static int init_params(void) |
e53b00d3 | 288 | { |
5a62257a | 289 | return line_range__init(¶ms.line_range); |
e53b00d3 MH |
290 | } |
291 | ||
292 | static void cleanup_params(void) | |
293 | { | |
294 | int i; | |
295 | ||
296 | for (i = 0; i < params.nevents; i++) | |
297 | clear_perf_probe_event(params.events + i); | |
e53b00d3 MH |
298 | line_range__clear(¶ms.line_range); |
299 | free(params.target); | |
200802a4 | 300 | strfilter__delete(params.filter); |
e53b00d3 MH |
301 | memset(¶ms, 0, sizeof(params)); |
302 | } | |
303 | ||
b4bf1130 MH |
304 | static void pr_err_with_code(const char *msg, int err) |
305 | { | |
5f03cba4 MH |
306 | char sbuf[STRERR_BUFSIZE]; |
307 | ||
b4bf1130 | 308 | pr_err("%s", msg); |
5f03cba4 MH |
309 | pr_debug(" Reason: %s (Code: %d)", |
310 | strerror_r(-err, sbuf, sizeof(sbuf)), err); | |
b4bf1130 MH |
311 | pr_err("\n"); |
312 | } | |
313 | ||
e53b00d3 MH |
314 | static int |
315 | __cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused) | |
11c4e4a3 ACM |
316 | { |
317 | const char * const probe_usage[] = { | |
318 | "perf probe [<options>] 'PROBEDEF' ['PROBEDEF' ...]", | |
319 | "perf probe [<options>] --add 'PROBEDEF' [--add 'PROBEDEF' ...]", | |
320 | "perf probe [<options>] --del '[GROUP:]EVENT' ...", | |
b6a89643 | 321 | "perf probe --list [GROUP:]EVENT ...", |
89fe808a | 322 | #ifdef HAVE_DWARF_SUPPORT |
11c4e4a3 ACM |
323 | "perf probe [<options>] --line 'LINEDESC'", |
324 | "perf probe [<options>] --vars 'PROBEPOINT'", | |
f3ab481c | 325 | #endif |
b3ac032b | 326 | "perf probe [<options>] --funcs", |
11c4e4a3 | 327 | NULL |
b6a89643 | 328 | }; |
13dcbbc0 | 329 | struct option options[] = { |
c0555642 | 330 | OPT_INCR('v', "verbose", &verbose, |
89c69c0e | 331 | "be more verbose (show parsed arguments, etc)"), |
5e17b28f MH |
332 | OPT_BOOLEAN('q', "quiet", ¶ms.quiet, |
333 | "be quiet (do not show any mesages)"), | |
b6a89643 | 334 | OPT_CALLBACK_DEFAULT('l', "list", NULL, "[GROUP:]EVENT", |
b1019d5e MH |
335 | "list up probe events", |
336 | opt_set_filter_with_command, DEFAULT_LIST_FILTER), | |
fa28244d | 337 | OPT_CALLBACK('d', "del", NULL, "[GROUP:]EVENT", "delete a probe event.", |
b1019d5e | 338 | opt_set_filter_with_command), |
46ab4926 | 339 | OPT_CALLBACK('a', "add", NULL, |
89fe808a | 340 | #ifdef HAVE_DWARF_SUPPORT |
32cb0dd5 | 341 | "[EVENT=]FUNC[@SRC][+OFF|%return|:RL|;PT]|SRC:AL|SRC;PT" |
48481938 | 342 | " [[NAME=]ARG ...]", |
4b4da7f7 | 343 | #else |
48481938 | 344 | "[EVENT=]FUNC[+OFF|%return] [[NAME=]ARG ...]", |
23e8ec0d | 345 | #endif |
4ea42b18 | 346 | "probe point definition, where\n" |
af663d75 MH |
347 | "\t\tGROUP:\tGroup name (optional)\n" |
348 | "\t\tEVENT:\tEvent name\n" | |
4ea42b18 | 349 | "\t\tFUNC:\tFunction name\n" |
2a9c8c36 | 350 | "\t\tOFF:\tOffset from function entry (in byte)\n" |
253977b0 | 351 | "\t\t%return:\tPut the probe at function return\n" |
89fe808a | 352 | #ifdef HAVE_DWARF_SUPPORT |
4ea42b18 | 353 | "\t\tSRC:\tSource code path\n" |
2a9c8c36 MH |
354 | "\t\tRL:\tRelative line number from function entry.\n" |
355 | "\t\tAL:\tAbsolute line number in file.\n" | |
356 | "\t\tPT:\tLazy expression of line code.\n" | |
4ea42b18 | 357 | "\t\tARG:\tProbe argument (local variable name or\n" |
50656eec | 358 | "\t\t\tkprobe-tracer argument format.)\n", |
4b4da7f7 MH |
359 | #else |
360 | "\t\tARG:\tProbe argument (kprobe-tracer argument format.)\n", | |
361 | #endif | |
253977b0 | 362 | opt_add_probe_event), |
ddb2f58f | 363 | OPT_BOOLEAN('f', "force", &probe_conf.force_add, "forcibly add events" |
d761b08b | 364 | " with existing name"), |
89fe808a | 365 | #ifdef HAVE_DWARF_SUPPORT |
631c9def | 366 | OPT_CALLBACK('L', "line", NULL, |
085ea739 | 367 | "FUNC[:RLN[+NUM|-RLN2]]|SRC:ALN[+NUM|-ALN2]", |
631c9def | 368 | "Show source code lines.", opt_show_lines), |
cf6eb489 MH |
369 | OPT_CALLBACK('V', "vars", NULL, |
370 | "FUNC[@SRC][+OFF|%return|:RL|;PT]|SRC:AL|SRC;PT", | |
371 | "Show accessible variables on PROBEDEF", opt_show_vars), | |
ddb2f58f | 372 | OPT_BOOLEAN('\0', "externs", &probe_conf.show_ext_vars, |
fb8c5a56 | 373 | "Show external variables too (with --vars only)"), |
349e8d26 HK |
374 | OPT_BOOLEAN('\0', "range", &probe_conf.show_location_range, |
375 | "Show variables location range in scope (with --vars only)"), | |
4b4da7f7 MH |
376 | OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name, |
377 | "file", "vmlinux pathname"), | |
9ed7e1b8 CD |
378 | OPT_STRING('s', "source", &symbol_conf.source_prefix, |
379 | "directory", "path to kernel source"), | |
225466f1 SD |
380 | OPT_CALLBACK('m', "module", NULL, "modname|path", |
381 | "target module name (for online) or path (for offline)", | |
382 | opt_set_target), | |
6cfd1f68 MH |
383 | OPT_BOOLEAN('\0', "no-inlines", &probe_conf.no_inlines, |
384 | "Don't search inlined functions"), | |
631c9def | 385 | #endif |
f4d7da49 | 386 | OPT__DRY_RUN(&probe_event_dry_run), |
ddb2f58f | 387 | OPT_INTEGER('\0', "max-probes", &probe_conf.max_probes, |
ef4a3565 | 388 | "Set how many probe points can be found for a probe."), |
9f7811d0 MH |
389 | OPT_CALLBACK_DEFAULT('F', "funcs", NULL, "[FILTER]", |
390 | "Show potential probe-able functions.", | |
b1019d5e | 391 | opt_set_filter_with_command, DEFAULT_FUNC_FILTER), |
3c42258c MH |
392 | OPT_CALLBACK('\0', "filter", NULL, |
393 | "[!]FILTER", "Set a filter (with --vars/funcs only)\n" | |
394 | "\t\t\t(default: \"" DEFAULT_VAR_FILTER "\" for --vars,\n" | |
395 | "\t\t\t \"" DEFAULT_FUNC_FILTER "\" for --funcs)", | |
396 | opt_set_filter), | |
225466f1 SD |
397 | OPT_CALLBACK('x', "exec", NULL, "executable|path", |
398 | "target executable name or path", opt_set_target), | |
35e17b24 | 399 | OPT_BOOLEAN(0, "demangle", &symbol_conf.demangle, |
4cdcc33d | 400 | "Enable symbol demangling"), |
763122ad AK |
401 | OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel, |
402 | "Enable kernel symbol demangling"), | |
4ea42b18 | 403 | OPT_END() |
11c4e4a3 | 404 | }; |
146a1439 MH |
405 | int ret; |
406 | ||
13dcbbc0 NK |
407 | set_option_flag(options, 'a', "add", PARSE_OPT_EXCLUSIVE); |
408 | set_option_flag(options, 'd', "del", PARSE_OPT_EXCLUSIVE); | |
409 | set_option_flag(options, 'l', "list", PARSE_OPT_EXCLUSIVE); | |
410 | #ifdef HAVE_DWARF_SUPPORT | |
411 | set_option_flag(options, 'L', "line", PARSE_OPT_EXCLUSIVE); | |
412 | set_option_flag(options, 'V', "vars", PARSE_OPT_EXCLUSIVE); | |
413 | #endif | |
b3ac032b | 414 | set_option_flag(options, 'F', "funcs", PARSE_OPT_EXCLUSIVE); |
13dcbbc0 | 415 | |
4ea42b18 | 416 | argc = parse_options(argc, argv, options, probe_usage, |
46ab4926 | 417 | PARSE_OPT_STOP_AT_NON_OPTION); |
ce11a603 MH |
418 | if (argc > 0) { |
419 | if (strcmp(argv[0], "-") == 0) { | |
420 | pr_warning(" Error: '-' is not supported.\n"); | |
421 | usage_with_options(probe_usage, options); | |
422 | } | |
b1019d5e MH |
423 | if (params.command && params.command != 'a') { |
424 | pr_warning(" Error: another command except --add is set.\n"); | |
425 | usage_with_options(probe_usage, options); | |
426 | } | |
146a1439 MH |
427 | ret = parse_probe_event_argv(argc, argv); |
428 | if (ret < 0) { | |
b4bf1130 | 429 | pr_err_with_code(" Error: Command Parse Error.", ret); |
146a1439 MH |
430 | return ret; |
431 | } | |
b1019d5e | 432 | params.command = 'a'; |
ce11a603 | 433 | } |
46ab4926 | 434 | |
5e17b28f MH |
435 | if (params.quiet) { |
436 | if (verbose != 0) { | |
437 | pr_err(" Error: -v and -q are exclusive.\n"); | |
438 | return -EINVAL; | |
439 | } | |
440 | verbose = -1; | |
441 | } | |
442 | ||
ddb2f58f MH |
443 | if (probe_conf.max_probes == 0) |
444 | probe_conf.max_probes = MAX_PROBES; | |
ef4a3565 | 445 | |
fd930ff9 FBH |
446 | /* |
447 | * Only consider the user's kernel image path if given. | |
448 | */ | |
449 | symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL); | |
450 | ||
b1019d5e MH |
451 | switch (params.command) { |
452 | case 'l': | |
225466f1 SD |
453 | if (params.uprobes) { |
454 | pr_warning(" Error: Don't use --list with --exec.\n"); | |
455 | usage_with_options(probe_usage, options); | |
456 | } | |
b6a89643 | 457 | ret = show_perf_probe_events(params.filter); |
146a1439 | 458 | if (ret < 0) |
b4bf1130 | 459 | pr_err_with_code(" Error: Failed to show event list.", ret); |
146a1439 | 460 | return ret; |
b1019d5e | 461 | case 'F': |
225466f1 SD |
462 | ret = show_available_funcs(params.target, params.filter, |
463 | params.uprobes); | |
e80711ca | 464 | if (ret < 0) |
b4bf1130 | 465 | pr_err_with_code(" Error: Failed to show functions.", ret); |
e80711ca | 466 | return ret; |
89fe808a | 467 | #ifdef HAVE_DWARF_SUPPORT |
b1019d5e | 468 | case 'L': |
2b394bc4 MH |
469 | ret = show_line_range(¶ms.line_range, params.target, |
470 | params.uprobes); | |
146a1439 | 471 | if (ret < 0) |
b4bf1130 | 472 | pr_err_with_code(" Error: Failed to show lines.", ret); |
146a1439 | 473 | return ret; |
b1019d5e | 474 | case 'V': |
bd09d7b5 MH |
475 | if (!params.filter) |
476 | params.filter = strfilter__new(DEFAULT_VAR_FILTER, | |
477 | NULL); | |
478 | ||
cf6eb489 | 479 | ret = show_available_vars(params.events, params.nevents, |
ddb2f58f | 480 | params.filter); |
cf6eb489 | 481 | if (ret < 0) |
b4bf1130 | 482 | pr_err_with_code(" Error: Failed to show vars.", ret); |
cf6eb489 | 483 | return ret; |
631c9def | 484 | #endif |
b1019d5e | 485 | case 'd': |
307a464b | 486 | ret = del_perf_probe_events(params.filter); |
146a1439 | 487 | if (ret < 0) { |
b4bf1130 | 488 | pr_err_with_code(" Error: Failed to delete events.", ret); |
146a1439 MH |
489 | return ret; |
490 | } | |
b1019d5e MH |
491 | break; |
492 | case 'a': | |
8cb0aa4c MH |
493 | /* Ensure the last given target is used */ |
494 | if (params.target && !params.target_used) { | |
495 | pr_warning(" Error: -x/-m must follow the probe definitions.\n"); | |
496 | usage_with_options(probe_usage, options); | |
497 | } | |
498 | ||
ddb2f58f | 499 | ret = add_perf_probe_events(params.events, params.nevents); |
146a1439 | 500 | if (ret < 0) { |
b4bf1130 | 501 | pr_err_with_code(" Error: Failed to add events.", ret); |
146a1439 MH |
502 | return ret; |
503 | } | |
b1019d5e MH |
504 | break; |
505 | default: | |
506 | usage_with_options(probe_usage, options); | |
146a1439 | 507 | } |
4ea42b18 MH |
508 | return 0; |
509 | } | |
e53b00d3 MH |
510 | |
511 | int cmd_probe(int argc, const char **argv, const char *prefix) | |
512 | { | |
513 | int ret; | |
514 | ||
5a62257a MH |
515 | ret = init_params(); |
516 | if (!ret) { | |
517 | ret = __cmd_probe(argc, argv, prefix); | |
518 | cleanup_params(); | |
519 | } | |
e53b00d3 | 520 | |
9bc9f3b6 | 521 | return ret < 0 ? ret : 0; |
e53b00d3 | 522 | } |