| 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 | */ |
| 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 | |
| 33 | #include "perf.h" |
| 34 | #include "builtin.h" |
| 35 | #include "util/util.h" |
| 36 | #include "util/strlist.h" |
| 37 | #include "util/strfilter.h" |
| 38 | #include "util/symbol.h" |
| 39 | #include "util/debug.h" |
| 40 | #include <subcmd/parse-options.h> |
| 41 | #include "util/probe-finder.h" |
| 42 | #include "util/probe-event.h" |
| 43 | #include "util/probe-file.h" |
| 44 | |
| 45 | #define DEFAULT_VAR_FILTER "!__k???tab_* & !__crc_*" |
| 46 | #define DEFAULT_FUNC_FILTER "!_*" |
| 47 | #define DEFAULT_LIST_FILTER "*" |
| 48 | |
| 49 | /* Session management structure */ |
| 50 | static struct { |
| 51 | int command; /* Command short_name */ |
| 52 | bool list_events; |
| 53 | bool uprobes; |
| 54 | bool quiet; |
| 55 | bool target_used; |
| 56 | int nevents; |
| 57 | struct perf_probe_event events[MAX_PROBES]; |
| 58 | struct line_range line_range; |
| 59 | char *target; |
| 60 | struct strfilter *filter; |
| 61 | } params; |
| 62 | |
| 63 | /* Parse an event definition. Note that any error must die. */ |
| 64 | static int parse_probe_event(const char *str) |
| 65 | { |
| 66 | struct perf_probe_event *pev = ¶ms.events[params.nevents]; |
| 67 | int ret; |
| 68 | |
| 69 | pr_debug("probe-definition(%d): %s\n", params.nevents, str); |
| 70 | if (++params.nevents == MAX_PROBES) { |
| 71 | pr_err("Too many probes (> %d) were specified.", MAX_PROBES); |
| 72 | return -1; |
| 73 | } |
| 74 | |
| 75 | pev->uprobes = params.uprobes; |
| 76 | if (params.target) { |
| 77 | pev->target = strdup(params.target); |
| 78 | if (!pev->target) |
| 79 | return -ENOMEM; |
| 80 | params.target_used = true; |
| 81 | } |
| 82 | |
| 83 | /* Parse a perf-probe command into event */ |
| 84 | ret = parse_perf_probe_command(str, pev); |
| 85 | pr_debug("%d arguments\n", pev->nargs); |
| 86 | |
| 87 | return ret; |
| 88 | } |
| 89 | |
| 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 | |
| 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 == '/') { |
| 125 | params.target = strdup(ptr); |
| 126 | if (!params.target) |
| 127 | return -ENOMEM; |
| 128 | params.target_used = false; |
| 129 | |
| 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 | |
| 141 | static int parse_probe_event_argv(int argc, const char **argv) |
| 142 | { |
| 143 | int i, len, ret, found_target; |
| 144 | char *buf; |
| 145 | |
| 146 | found_target = set_target(argv[0]); |
| 147 | if (found_target < 0) |
| 148 | return found_target; |
| 149 | |
| 150 | if (found_target && argc == 1) |
| 151 | return 0; |
| 152 | |
| 153 | /* Bind up rest arguments */ |
| 154 | len = 0; |
| 155 | for (i = 0; i < argc; i++) { |
| 156 | if (i == 0 && found_target) |
| 157 | continue; |
| 158 | |
| 159 | len += strlen(argv[i]) + 1; |
| 160 | } |
| 161 | buf = zalloc(len + 1); |
| 162 | if (buf == NULL) |
| 163 | return -ENOMEM; |
| 164 | len = 0; |
| 165 | for (i = 0; i < argc; i++) { |
| 166 | if (i == 0 && found_target) |
| 167 | continue; |
| 168 | |
| 169 | len += sprintf(&buf[len], "%s ", argv[i]); |
| 170 | } |
| 171 | ret = parse_probe_event(buf); |
| 172 | free(buf); |
| 173 | return ret; |
| 174 | } |
| 175 | |
| 176 | static int opt_set_target(const struct option *opt, const char *str, |
| 177 | int unset __maybe_unused) |
| 178 | { |
| 179 | int ret = -ENOENT; |
| 180 | char *tmp; |
| 181 | |
| 182 | if (str) { |
| 183 | if (!strcmp(opt->long_name, "exec")) |
| 184 | params.uprobes = true; |
| 185 | else if (!strcmp(opt->long_name, "module")) |
| 186 | params.uprobes = false; |
| 187 | else |
| 188 | return ret; |
| 189 | |
| 190 | /* Expand given path to absolute path, except for modulename */ |
| 191 | if (params.uprobes || strchr(str, '/')) { |
| 192 | tmp = realpath(str, NULL); |
| 193 | if (!tmp) { |
| 194 | pr_warning("Failed to get the absolute path of %s: %m\n", str); |
| 195 | return ret; |
| 196 | } |
| 197 | } else { |
| 198 | tmp = strdup(str); |
| 199 | if (!tmp) |
| 200 | return -ENOMEM; |
| 201 | } |
| 202 | free(params.target); |
| 203 | params.target = tmp; |
| 204 | params.target_used = false; |
| 205 | ret = 0; |
| 206 | } |
| 207 | |
| 208 | return ret; |
| 209 | } |
| 210 | |
| 211 | /* Command option callbacks */ |
| 212 | |
| 213 | #ifdef HAVE_DWARF_SUPPORT |
| 214 | static int opt_show_lines(const struct option *opt, |
| 215 | const char *str, int unset __maybe_unused) |
| 216 | { |
| 217 | int ret = 0; |
| 218 | |
| 219 | if (!str) |
| 220 | return 0; |
| 221 | |
| 222 | if (params.command == 'L') { |
| 223 | pr_warning("Warning: more than one --line options are" |
| 224 | " detected. Only the first one is valid.\n"); |
| 225 | return 0; |
| 226 | } |
| 227 | |
| 228 | params.command = opt->short_name; |
| 229 | ret = parse_line_range_desc(str, ¶ms.line_range); |
| 230 | |
| 231 | return ret; |
| 232 | } |
| 233 | |
| 234 | static int opt_show_vars(const struct option *opt, |
| 235 | const char *str, int unset __maybe_unused) |
| 236 | { |
| 237 | struct perf_probe_event *pev = ¶ms.events[params.nevents]; |
| 238 | int ret; |
| 239 | |
| 240 | if (!str) |
| 241 | return 0; |
| 242 | |
| 243 | ret = parse_probe_event(str); |
| 244 | if (!ret && pev->nargs != 0) { |
| 245 | pr_err(" Error: '--vars' doesn't accept arguments.\n"); |
| 246 | return -EINVAL; |
| 247 | } |
| 248 | params.command = opt->short_name; |
| 249 | |
| 250 | return ret; |
| 251 | } |
| 252 | #else |
| 253 | # define opt_show_lines NULL |
| 254 | # define opt_show_vars NULL |
| 255 | #endif |
| 256 | static int opt_add_probe_event(const struct option *opt, |
| 257 | const char *str, int unset __maybe_unused) |
| 258 | { |
| 259 | if (str) { |
| 260 | params.command = opt->short_name; |
| 261 | return parse_probe_event(str); |
| 262 | } |
| 263 | |
| 264 | return 0; |
| 265 | } |
| 266 | |
| 267 | static int opt_set_filter_with_command(const struct option *opt, |
| 268 | const char *str, int unset) |
| 269 | { |
| 270 | if (!unset) |
| 271 | params.command = opt->short_name; |
| 272 | |
| 273 | if (str) |
| 274 | return params_add_filter(str); |
| 275 | |
| 276 | return 0; |
| 277 | } |
| 278 | |
| 279 | static int opt_set_filter(const struct option *opt __maybe_unused, |
| 280 | const char *str, int unset __maybe_unused) |
| 281 | { |
| 282 | if (str) |
| 283 | return params_add_filter(str); |
| 284 | |
| 285 | return 0; |
| 286 | } |
| 287 | |
| 288 | static int init_params(void) |
| 289 | { |
| 290 | return line_range__init(¶ms.line_range); |
| 291 | } |
| 292 | |
| 293 | static void cleanup_params(void) |
| 294 | { |
| 295 | int i; |
| 296 | |
| 297 | for (i = 0; i < params.nevents; i++) |
| 298 | clear_perf_probe_event(params.events + i); |
| 299 | line_range__clear(¶ms.line_range); |
| 300 | free(params.target); |
| 301 | strfilter__delete(params.filter); |
| 302 | memset(¶ms, 0, sizeof(params)); |
| 303 | } |
| 304 | |
| 305 | static void pr_err_with_code(const char *msg, int err) |
| 306 | { |
| 307 | char sbuf[STRERR_BUFSIZE]; |
| 308 | |
| 309 | pr_err("%s", msg); |
| 310 | pr_debug(" Reason: %s (Code: %d)", |
| 311 | str_error_r(-err, sbuf, sizeof(sbuf)), err); |
| 312 | pr_err("\n"); |
| 313 | } |
| 314 | |
| 315 | static int perf_add_probe_events(struct perf_probe_event *pevs, int npevs) |
| 316 | { |
| 317 | int ret; |
| 318 | int i, k; |
| 319 | const char *event = NULL, *group = NULL; |
| 320 | |
| 321 | ret = init_probe_symbol_maps(pevs->uprobes); |
| 322 | if (ret < 0) |
| 323 | return ret; |
| 324 | |
| 325 | ret = convert_perf_probe_events(pevs, npevs); |
| 326 | if (ret < 0) |
| 327 | goto out_cleanup; |
| 328 | |
| 329 | ret = apply_perf_probe_events(pevs, npevs); |
| 330 | if (ret < 0) |
| 331 | goto out_cleanup; |
| 332 | |
| 333 | for (i = k = 0; i < npevs; i++) |
| 334 | k += pevs[i].ntevs; |
| 335 | |
| 336 | pr_info("Added new event%s\n", (k > 1) ? "s:" : ":"); |
| 337 | for (i = 0; i < npevs; i++) { |
| 338 | struct perf_probe_event *pev = &pevs[i]; |
| 339 | |
| 340 | for (k = 0; k < pev->ntevs; k++) { |
| 341 | struct probe_trace_event *tev = &pev->tevs[k]; |
| 342 | |
| 343 | /* We use tev's name for showing new events */ |
| 344 | show_perf_probe_event(tev->group, tev->event, pev, |
| 345 | tev->point.module, false); |
| 346 | |
| 347 | /* Save the last valid name */ |
| 348 | event = tev->event; |
| 349 | group = tev->group; |
| 350 | } |
| 351 | } |
| 352 | |
| 353 | /* Note that it is possible to skip all events because of blacklist */ |
| 354 | if (event) { |
| 355 | /* Show how to use the event. */ |
| 356 | pr_info("\nYou can now use it in all perf tools, such as:\n\n"); |
| 357 | pr_info("\tperf record -e %s:%s -aR sleep 1\n\n", group, event); |
| 358 | } |
| 359 | |
| 360 | out_cleanup: |
| 361 | cleanup_perf_probe_events(pevs, npevs); |
| 362 | exit_probe_symbol_maps(); |
| 363 | return ret; |
| 364 | } |
| 365 | |
| 366 | static int del_perf_probe_caches(struct strfilter *filter) |
| 367 | { |
| 368 | struct probe_cache *cache; |
| 369 | struct strlist *bidlist; |
| 370 | struct str_node *nd; |
| 371 | int ret; |
| 372 | |
| 373 | bidlist = build_id_cache__list_all(false); |
| 374 | if (!bidlist) { |
| 375 | ret = -errno; |
| 376 | pr_debug("Failed to get buildids: %d\n", ret); |
| 377 | return ret ?: -ENOMEM; |
| 378 | } |
| 379 | |
| 380 | strlist__for_each_entry(nd, bidlist) { |
| 381 | cache = probe_cache__new(nd->s); |
| 382 | if (!cache) |
| 383 | continue; |
| 384 | if (probe_cache__filter_purge(cache, filter) < 0 || |
| 385 | probe_cache__commit(cache) < 0) |
| 386 | pr_warning("Failed to remove entries for %s\n", nd->s); |
| 387 | probe_cache__delete(cache); |
| 388 | } |
| 389 | return 0; |
| 390 | } |
| 391 | |
| 392 | static int perf_del_probe_events(struct strfilter *filter) |
| 393 | { |
| 394 | int ret, ret2, ufd = -1, kfd = -1; |
| 395 | char *str = strfilter__string(filter); |
| 396 | struct strlist *klist = NULL, *ulist = NULL; |
| 397 | struct str_node *ent; |
| 398 | |
| 399 | if (!str) |
| 400 | return -EINVAL; |
| 401 | |
| 402 | pr_debug("Delete filter: \'%s\'\n", str); |
| 403 | |
| 404 | if (probe_conf.cache) |
| 405 | return del_perf_probe_caches(filter); |
| 406 | |
| 407 | /* Get current event names */ |
| 408 | ret = probe_file__open_both(&kfd, &ufd, PF_FL_RW); |
| 409 | if (ret < 0) |
| 410 | goto out; |
| 411 | |
| 412 | klist = strlist__new(NULL, NULL); |
| 413 | ulist = strlist__new(NULL, NULL); |
| 414 | if (!klist || !ulist) { |
| 415 | ret = -ENOMEM; |
| 416 | goto out; |
| 417 | } |
| 418 | |
| 419 | ret = probe_file__get_events(kfd, filter, klist); |
| 420 | if (ret == 0) { |
| 421 | strlist__for_each_entry(ent, klist) |
| 422 | pr_info("Removed event: %s\n", ent->s); |
| 423 | |
| 424 | ret = probe_file__del_strlist(kfd, klist); |
| 425 | if (ret < 0) |
| 426 | goto error; |
| 427 | } |
| 428 | |
| 429 | ret2 = probe_file__get_events(ufd, filter, ulist); |
| 430 | if (ret2 == 0) { |
| 431 | strlist__for_each_entry(ent, ulist) |
| 432 | pr_info("Removed event: %s\n", ent->s); |
| 433 | |
| 434 | ret2 = probe_file__del_strlist(ufd, ulist); |
| 435 | if (ret2 < 0) |
| 436 | goto error; |
| 437 | } |
| 438 | |
| 439 | if (ret == -ENOENT && ret2 == -ENOENT) |
| 440 | pr_debug("\"%s\" does not hit any event.\n", str); |
| 441 | /* Note that this is silently ignored */ |
| 442 | ret = 0; |
| 443 | |
| 444 | error: |
| 445 | if (kfd >= 0) |
| 446 | close(kfd); |
| 447 | if (ufd >= 0) |
| 448 | close(ufd); |
| 449 | out: |
| 450 | strlist__delete(klist); |
| 451 | strlist__delete(ulist); |
| 452 | free(str); |
| 453 | |
| 454 | return ret; |
| 455 | } |
| 456 | |
| 457 | static int |
| 458 | __cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused) |
| 459 | { |
| 460 | const char * const probe_usage[] = { |
| 461 | "perf probe [<options>] 'PROBEDEF' ['PROBEDEF' ...]", |
| 462 | "perf probe [<options>] --add 'PROBEDEF' [--add 'PROBEDEF' ...]", |
| 463 | "perf probe [<options>] --del '[GROUP:]EVENT' ...", |
| 464 | "perf probe --list [GROUP:]EVENT ...", |
| 465 | #ifdef HAVE_DWARF_SUPPORT |
| 466 | "perf probe [<options>] --line 'LINEDESC'", |
| 467 | "perf probe [<options>] --vars 'PROBEPOINT'", |
| 468 | #endif |
| 469 | "perf probe [<options>] --funcs", |
| 470 | NULL |
| 471 | }; |
| 472 | struct option options[] = { |
| 473 | OPT_INCR('v', "verbose", &verbose, |
| 474 | "be more verbose (show parsed arguments, etc)"), |
| 475 | OPT_BOOLEAN('q', "quiet", ¶ms.quiet, |
| 476 | "be quiet (do not show any mesages)"), |
| 477 | OPT_CALLBACK_DEFAULT('l', "list", NULL, "[GROUP:]EVENT", |
| 478 | "list up probe events", |
| 479 | opt_set_filter_with_command, DEFAULT_LIST_FILTER), |
| 480 | OPT_CALLBACK('d', "del", NULL, "[GROUP:]EVENT", "delete a probe event.", |
| 481 | opt_set_filter_with_command), |
| 482 | OPT_CALLBACK('a', "add", NULL, |
| 483 | #ifdef HAVE_DWARF_SUPPORT |
| 484 | "[EVENT=]FUNC[@SRC][+OFF|%return|:RL|;PT]|SRC:AL|SRC;PT" |
| 485 | " [[NAME=]ARG ...]", |
| 486 | #else |
| 487 | "[EVENT=]FUNC[+OFF|%return] [[NAME=]ARG ...]", |
| 488 | #endif |
| 489 | "probe point definition, where\n" |
| 490 | "\t\tGROUP:\tGroup name (optional)\n" |
| 491 | "\t\tEVENT:\tEvent name\n" |
| 492 | "\t\tFUNC:\tFunction name\n" |
| 493 | "\t\tOFF:\tOffset from function entry (in byte)\n" |
| 494 | "\t\t%return:\tPut the probe at function return\n" |
| 495 | #ifdef HAVE_DWARF_SUPPORT |
| 496 | "\t\tSRC:\tSource code path\n" |
| 497 | "\t\tRL:\tRelative line number from function entry.\n" |
| 498 | "\t\tAL:\tAbsolute line number in file.\n" |
| 499 | "\t\tPT:\tLazy expression of line code.\n" |
| 500 | "\t\tARG:\tProbe argument (local variable name or\n" |
| 501 | "\t\t\tkprobe-tracer argument format.)\n", |
| 502 | #else |
| 503 | "\t\tARG:\tProbe argument (kprobe-tracer argument format.)\n", |
| 504 | #endif |
| 505 | opt_add_probe_event), |
| 506 | OPT_BOOLEAN('f', "force", &probe_conf.force_add, "forcibly add events" |
| 507 | " with existing name"), |
| 508 | OPT_CALLBACK('L', "line", NULL, |
| 509 | "FUNC[:RLN[+NUM|-RLN2]]|SRC:ALN[+NUM|-ALN2]", |
| 510 | "Show source code lines.", opt_show_lines), |
| 511 | OPT_CALLBACK('V', "vars", NULL, |
| 512 | "FUNC[@SRC][+OFF|%return|:RL|;PT]|SRC:AL|SRC;PT", |
| 513 | "Show accessible variables on PROBEDEF", opt_show_vars), |
| 514 | OPT_BOOLEAN('\0', "externs", &probe_conf.show_ext_vars, |
| 515 | "Show external variables too (with --vars only)"), |
| 516 | OPT_BOOLEAN('\0', "range", &probe_conf.show_location_range, |
| 517 | "Show variables location range in scope (with --vars only)"), |
| 518 | OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name, |
| 519 | "file", "vmlinux pathname"), |
| 520 | OPT_STRING('s', "source", &symbol_conf.source_prefix, |
| 521 | "directory", "path to kernel source"), |
| 522 | OPT_BOOLEAN('\0', "no-inlines", &probe_conf.no_inlines, |
| 523 | "Don't search inlined functions"), |
| 524 | OPT__DRY_RUN(&probe_event_dry_run), |
| 525 | OPT_INTEGER('\0', "max-probes", &probe_conf.max_probes, |
| 526 | "Set how many probe points can be found for a probe."), |
| 527 | OPT_CALLBACK_DEFAULT('F', "funcs", NULL, "[FILTER]", |
| 528 | "Show potential probe-able functions.", |
| 529 | opt_set_filter_with_command, DEFAULT_FUNC_FILTER), |
| 530 | OPT_CALLBACK('\0', "filter", NULL, |
| 531 | "[!]FILTER", "Set a filter (with --vars/funcs only)\n" |
| 532 | "\t\t\t(default: \"" DEFAULT_VAR_FILTER "\" for --vars,\n" |
| 533 | "\t\t\t \"" DEFAULT_FUNC_FILTER "\" for --funcs)", |
| 534 | opt_set_filter), |
| 535 | OPT_CALLBACK('x', "exec", NULL, "executable|path", |
| 536 | "target executable name or path", opt_set_target), |
| 537 | OPT_CALLBACK('m', "module", NULL, "modname|path", |
| 538 | "target module name (for online) or path (for offline)", |
| 539 | opt_set_target), |
| 540 | OPT_BOOLEAN(0, "demangle", &symbol_conf.demangle, |
| 541 | "Enable symbol demangling"), |
| 542 | OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel, |
| 543 | "Enable kernel symbol demangling"), |
| 544 | OPT_BOOLEAN(0, "cache", &probe_conf.cache, "Manipulate probe cache"), |
| 545 | OPT_END() |
| 546 | }; |
| 547 | int ret; |
| 548 | |
| 549 | set_option_flag(options, 'a', "add", PARSE_OPT_EXCLUSIVE); |
| 550 | set_option_flag(options, 'd', "del", PARSE_OPT_EXCLUSIVE); |
| 551 | set_option_flag(options, 'l', "list", PARSE_OPT_EXCLUSIVE); |
| 552 | #ifdef HAVE_DWARF_SUPPORT |
| 553 | set_option_flag(options, 'L', "line", PARSE_OPT_EXCLUSIVE); |
| 554 | set_option_flag(options, 'V', "vars", PARSE_OPT_EXCLUSIVE); |
| 555 | #else |
| 556 | # define set_nobuild(s, l, c) set_option_nobuild(options, s, l, "NO_DWARF=1", c) |
| 557 | set_nobuild('L', "line", false); |
| 558 | set_nobuild('V', "vars", false); |
| 559 | set_nobuild('\0', "externs", false); |
| 560 | set_nobuild('\0', "range", false); |
| 561 | set_nobuild('k', "vmlinux", true); |
| 562 | set_nobuild('s', "source", true); |
| 563 | set_nobuild('\0', "no-inlines", true); |
| 564 | # undef set_nobuild |
| 565 | #endif |
| 566 | set_option_flag(options, 'F', "funcs", PARSE_OPT_EXCLUSIVE); |
| 567 | |
| 568 | argc = parse_options(argc, argv, options, probe_usage, |
| 569 | PARSE_OPT_STOP_AT_NON_OPTION); |
| 570 | if (argc > 0) { |
| 571 | if (strcmp(argv[0], "-") == 0) { |
| 572 | usage_with_options_msg(probe_usage, options, |
| 573 | "'-' is not supported.\n"); |
| 574 | } |
| 575 | if (params.command && params.command != 'a') { |
| 576 | usage_with_options_msg(probe_usage, options, |
| 577 | "another command except --add is set.\n"); |
| 578 | } |
| 579 | ret = parse_probe_event_argv(argc, argv); |
| 580 | if (ret < 0) { |
| 581 | pr_err_with_code(" Error: Command Parse Error.", ret); |
| 582 | return ret; |
| 583 | } |
| 584 | params.command = 'a'; |
| 585 | } |
| 586 | |
| 587 | if (params.quiet) { |
| 588 | if (verbose != 0) { |
| 589 | pr_err(" Error: -v and -q are exclusive.\n"); |
| 590 | return -EINVAL; |
| 591 | } |
| 592 | verbose = -1; |
| 593 | } |
| 594 | |
| 595 | if (probe_conf.max_probes == 0) |
| 596 | probe_conf.max_probes = MAX_PROBES; |
| 597 | |
| 598 | /* |
| 599 | * Only consider the user's kernel image path if given. |
| 600 | */ |
| 601 | symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL); |
| 602 | |
| 603 | switch (params.command) { |
| 604 | case 'l': |
| 605 | if (params.uprobes) { |
| 606 | pr_err(" Error: Don't use --list with --exec.\n"); |
| 607 | parse_options_usage(probe_usage, options, "l", true); |
| 608 | parse_options_usage(NULL, options, "x", true); |
| 609 | return -EINVAL; |
| 610 | } |
| 611 | ret = show_perf_probe_events(params.filter); |
| 612 | if (ret < 0) |
| 613 | pr_err_with_code(" Error: Failed to show event list.", ret); |
| 614 | return ret; |
| 615 | case 'F': |
| 616 | ret = show_available_funcs(params.target, params.filter, |
| 617 | params.uprobes); |
| 618 | if (ret < 0) |
| 619 | pr_err_with_code(" Error: Failed to show functions.", ret); |
| 620 | return ret; |
| 621 | #ifdef HAVE_DWARF_SUPPORT |
| 622 | case 'L': |
| 623 | ret = show_line_range(¶ms.line_range, params.target, |
| 624 | params.uprobes); |
| 625 | if (ret < 0) |
| 626 | pr_err_with_code(" Error: Failed to show lines.", ret); |
| 627 | return ret; |
| 628 | case 'V': |
| 629 | if (!params.filter) |
| 630 | params.filter = strfilter__new(DEFAULT_VAR_FILTER, |
| 631 | NULL); |
| 632 | |
| 633 | ret = show_available_vars(params.events, params.nevents, |
| 634 | params.filter); |
| 635 | if (ret < 0) |
| 636 | pr_err_with_code(" Error: Failed to show vars.", ret); |
| 637 | return ret; |
| 638 | #endif |
| 639 | case 'd': |
| 640 | ret = perf_del_probe_events(params.filter); |
| 641 | if (ret < 0) { |
| 642 | pr_err_with_code(" Error: Failed to delete events.", ret); |
| 643 | return ret; |
| 644 | } |
| 645 | break; |
| 646 | case 'a': |
| 647 | /* Ensure the last given target is used */ |
| 648 | if (params.target && !params.target_used) { |
| 649 | pr_err(" Error: -x/-m must follow the probe definitions.\n"); |
| 650 | parse_options_usage(probe_usage, options, "m", true); |
| 651 | parse_options_usage(NULL, options, "x", true); |
| 652 | return -EINVAL; |
| 653 | } |
| 654 | |
| 655 | ret = perf_add_probe_events(params.events, params.nevents); |
| 656 | if (ret < 0) { |
| 657 | pr_err_with_code(" Error: Failed to add events.", ret); |
| 658 | return ret; |
| 659 | } |
| 660 | break; |
| 661 | default: |
| 662 | usage_with_options(probe_usage, options); |
| 663 | } |
| 664 | return 0; |
| 665 | } |
| 666 | |
| 667 | int cmd_probe(int argc, const char **argv, const char *prefix) |
| 668 | { |
| 669 | int ret; |
| 670 | |
| 671 | ret = init_params(); |
| 672 | if (!ret) { |
| 673 | ret = __cmd_probe(argc, argv, prefix); |
| 674 | cleanup_params(); |
| 675 | } |
| 676 | |
| 677 | return ret < 0 ? ret : 0; |
| 678 | } |