Masami Hiramatsu | 92f6c72 | 2015-07-15 18:14:07 +0900 | [diff] [blame] | 1 | /* |
| 2 | * probe-file.c : operate ftrace k/uprobe events files |
| 3 | * |
| 4 | * Written by Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | */ |
Masami Hiramatsu | dd97549 | 2016-06-15 12:28:30 +0900 | [diff] [blame] | 17 | #include <sys/uio.h> |
Masami Hiramatsu | 92f6c72 | 2015-07-15 18:14:07 +0900 | [diff] [blame] | 18 | #include "util.h" |
| 19 | #include "event.h" |
| 20 | #include "strlist.h" |
| 21 | #include "debug.h" |
| 22 | #include "cache.h" |
| 23 | #include "color.h" |
| 24 | #include "symbol.h" |
| 25 | #include "thread.h" |
Jiri Olsa | fbf9962 | 2015-09-02 09:56:45 +0200 | [diff] [blame] | 26 | #include <api/fs/tracing_path.h> |
Masami Hiramatsu | 92f6c72 | 2015-07-15 18:14:07 +0900 | [diff] [blame] | 27 | #include "probe-event.h" |
| 28 | #include "probe-file.h" |
| 29 | #include "session.h" |
| 30 | |
| 31 | #define MAX_CMDLEN 256 |
| 32 | |
| 33 | static void print_open_warning(int err, bool uprobe) |
| 34 | { |
| 35 | char sbuf[STRERR_BUFSIZE]; |
| 36 | |
| 37 | if (err == -ENOENT) { |
| 38 | const char *config; |
| 39 | |
| 40 | if (uprobe) |
| 41 | config = "CONFIG_UPROBE_EVENTS"; |
| 42 | else |
| 43 | config = "CONFIG_KPROBE_EVENTS"; |
| 44 | |
| 45 | pr_warning("%cprobe_events file does not exist" |
| 46 | " - please rebuild kernel with %s.\n", |
| 47 | uprobe ? 'u' : 'k', config); |
| 48 | } else if (err == -ENOTSUP) |
| 49 | pr_warning("Tracefs or debugfs is not mounted.\n"); |
| 50 | else |
| 51 | pr_warning("Failed to open %cprobe_events: %s\n", |
| 52 | uprobe ? 'u' : 'k', |
Arnaldo Carvalho de Melo | c8b5f2c | 2016-07-06 11:56:20 -0300 | [diff] [blame] | 53 | str_error_r(-err, sbuf, sizeof(sbuf))); |
Masami Hiramatsu | 92f6c72 | 2015-07-15 18:14:07 +0900 | [diff] [blame] | 54 | } |
| 55 | |
| 56 | static void print_both_open_warning(int kerr, int uerr) |
| 57 | { |
| 58 | /* Both kprobes and uprobes are disabled, warn it. */ |
| 59 | if (kerr == -ENOTSUP && uerr == -ENOTSUP) |
| 60 | pr_warning("Tracefs or debugfs is not mounted.\n"); |
| 61 | else if (kerr == -ENOENT && uerr == -ENOENT) |
| 62 | pr_warning("Please rebuild kernel with CONFIG_KPROBE_EVENTS " |
| 63 | "or/and CONFIG_UPROBE_EVENTS.\n"); |
| 64 | else { |
| 65 | char sbuf[STRERR_BUFSIZE]; |
| 66 | pr_warning("Failed to open kprobe events: %s.\n", |
Arnaldo Carvalho de Melo | c8b5f2c | 2016-07-06 11:56:20 -0300 | [diff] [blame] | 67 | str_error_r(-kerr, sbuf, sizeof(sbuf))); |
Masami Hiramatsu | 92f6c72 | 2015-07-15 18:14:07 +0900 | [diff] [blame] | 68 | pr_warning("Failed to open uprobe events: %s.\n", |
Arnaldo Carvalho de Melo | c8b5f2c | 2016-07-06 11:56:20 -0300 | [diff] [blame] | 69 | str_error_r(-uerr, sbuf, sizeof(sbuf))); |
Masami Hiramatsu | 92f6c72 | 2015-07-15 18:14:07 +0900 | [diff] [blame] | 70 | } |
| 71 | } |
| 72 | |
| 73 | static int open_probe_events(const char *trace_file, bool readwrite) |
| 74 | { |
| 75 | char buf[PATH_MAX]; |
Masami Hiramatsu | 92f6c72 | 2015-07-15 18:14:07 +0900 | [diff] [blame] | 76 | int ret; |
| 77 | |
Masami Hiramatsu | 04e1196 | 2016-08-24 14:57:58 +0900 | [diff] [blame] | 78 | ret = e_snprintf(buf, PATH_MAX, "%s/%s", |
| 79 | tracing_path, trace_file); |
Masami Hiramatsu | 92f6c72 | 2015-07-15 18:14:07 +0900 | [diff] [blame] | 80 | if (ret >= 0) { |
| 81 | pr_debug("Opening %s write=%d\n", buf, readwrite); |
| 82 | if (readwrite && !probe_event_dry_run) |
| 83 | ret = open(buf, O_RDWR | O_APPEND, 0); |
| 84 | else |
| 85 | ret = open(buf, O_RDONLY, 0); |
| 86 | |
| 87 | if (ret < 0) |
| 88 | ret = -errno; |
| 89 | } |
| 90 | return ret; |
| 91 | } |
| 92 | |
| 93 | static int open_kprobe_events(bool readwrite) |
| 94 | { |
| 95 | return open_probe_events("kprobe_events", readwrite); |
| 96 | } |
| 97 | |
| 98 | static int open_uprobe_events(bool readwrite) |
| 99 | { |
| 100 | return open_probe_events("uprobe_events", readwrite); |
| 101 | } |
| 102 | |
| 103 | int probe_file__open(int flag) |
| 104 | { |
| 105 | int fd; |
| 106 | |
| 107 | if (flag & PF_FL_UPROBE) |
| 108 | fd = open_uprobe_events(flag & PF_FL_RW); |
| 109 | else |
| 110 | fd = open_kprobe_events(flag & PF_FL_RW); |
| 111 | if (fd < 0) |
| 112 | print_open_warning(fd, flag & PF_FL_UPROBE); |
| 113 | |
| 114 | return fd; |
| 115 | } |
| 116 | |
| 117 | int probe_file__open_both(int *kfd, int *ufd, int flag) |
| 118 | { |
| 119 | if (!kfd || !ufd) |
| 120 | return -EINVAL; |
| 121 | |
| 122 | *kfd = open_kprobe_events(flag & PF_FL_RW); |
| 123 | *ufd = open_uprobe_events(flag & PF_FL_RW); |
| 124 | if (*kfd < 0 && *ufd < 0) { |
| 125 | print_both_open_warning(*kfd, *ufd); |
| 126 | return *kfd; |
| 127 | } |
| 128 | |
| 129 | return 0; |
| 130 | } |
| 131 | |
| 132 | /* Get raw string list of current kprobe_events or uprobe_events */ |
| 133 | struct strlist *probe_file__get_rawlist(int fd) |
| 134 | { |
Colin Ian King | 0325862 | 2016-08-12 22:44:56 +0100 | [diff] [blame] | 135 | int ret, idx, fddup; |
Masami Hiramatsu | 92f6c72 | 2015-07-15 18:14:07 +0900 | [diff] [blame] | 136 | FILE *fp; |
| 137 | char buf[MAX_CMDLEN]; |
| 138 | char *p; |
| 139 | struct strlist *sl; |
| 140 | |
Wang Nan | 421fd08 | 2015-11-06 09:50:15 +0000 | [diff] [blame] | 141 | if (fd < 0) |
| 142 | return NULL; |
| 143 | |
Masami Hiramatsu | 92f6c72 | 2015-07-15 18:14:07 +0900 | [diff] [blame] | 144 | sl = strlist__new(NULL, NULL); |
Arnaldo Carvalho de Melo | 60ebc15 | 2016-08-15 17:06:47 -0300 | [diff] [blame] | 145 | if (sl == NULL) |
| 146 | return NULL; |
Masami Hiramatsu | 92f6c72 | 2015-07-15 18:14:07 +0900 | [diff] [blame] | 147 | |
Colin Ian King | 0325862 | 2016-08-12 22:44:56 +0100 | [diff] [blame] | 148 | fddup = dup(fd); |
| 149 | if (fddup < 0) |
| 150 | goto out_free_sl; |
| 151 | |
| 152 | fp = fdopen(fddup, "r"); |
| 153 | if (!fp) |
| 154 | goto out_close_fddup; |
| 155 | |
Masami Hiramatsu | 92f6c72 | 2015-07-15 18:14:07 +0900 | [diff] [blame] | 156 | while (!feof(fp)) { |
| 157 | p = fgets(buf, MAX_CMDLEN, fp); |
| 158 | if (!p) |
| 159 | break; |
| 160 | |
| 161 | idx = strlen(p) - 1; |
| 162 | if (p[idx] == '\n') |
| 163 | p[idx] = '\0'; |
| 164 | ret = strlist__add(sl, buf); |
| 165 | if (ret < 0) { |
| 166 | pr_debug("strlist__add failed (%d)\n", ret); |
Arnaldo Carvalho de Melo | 60ebc15 | 2016-08-15 17:06:47 -0300 | [diff] [blame] | 167 | goto out_close_fp; |
Masami Hiramatsu | 92f6c72 | 2015-07-15 18:14:07 +0900 | [diff] [blame] | 168 | } |
| 169 | } |
| 170 | fclose(fp); |
| 171 | |
| 172 | return sl; |
Colin Ian King | 0325862 | 2016-08-12 22:44:56 +0100 | [diff] [blame] | 173 | |
Arnaldo Carvalho de Melo | 60ebc15 | 2016-08-15 17:06:47 -0300 | [diff] [blame] | 174 | out_close_fp: |
| 175 | fclose(fp); |
| 176 | goto out_free_sl; |
Colin Ian King | 0325862 | 2016-08-12 22:44:56 +0100 | [diff] [blame] | 177 | out_close_fddup: |
| 178 | close(fddup); |
| 179 | out_free_sl: |
| 180 | strlist__delete(sl); |
| 181 | return NULL; |
Masami Hiramatsu | 92f6c72 | 2015-07-15 18:14:07 +0900 | [diff] [blame] | 182 | } |
| 183 | |
| 184 | static struct strlist *__probe_file__get_namelist(int fd, bool include_group) |
| 185 | { |
| 186 | char buf[128]; |
| 187 | struct strlist *sl, *rawlist; |
| 188 | struct str_node *ent; |
| 189 | struct probe_trace_event tev; |
| 190 | int ret = 0; |
| 191 | |
| 192 | memset(&tev, 0, sizeof(tev)); |
| 193 | rawlist = probe_file__get_rawlist(fd); |
| 194 | if (!rawlist) |
| 195 | return NULL; |
| 196 | sl = strlist__new(NULL, NULL); |
Arnaldo Carvalho de Melo | 602a1f4 | 2016-06-23 11:31:20 -0300 | [diff] [blame] | 197 | strlist__for_each_entry(ent, rawlist) { |
Masami Hiramatsu | 92f6c72 | 2015-07-15 18:14:07 +0900 | [diff] [blame] | 198 | ret = parse_probe_trace_command(ent->s, &tev); |
| 199 | if (ret < 0) |
| 200 | break; |
| 201 | if (include_group) { |
| 202 | ret = e_snprintf(buf, 128, "%s:%s", tev.group, |
| 203 | tev.event); |
| 204 | if (ret >= 0) |
| 205 | ret = strlist__add(sl, buf); |
| 206 | } else |
| 207 | ret = strlist__add(sl, tev.event); |
| 208 | clear_probe_trace_event(&tev); |
| 209 | if (ret < 0) |
| 210 | break; |
| 211 | } |
| 212 | strlist__delete(rawlist); |
| 213 | |
| 214 | if (ret < 0) { |
| 215 | strlist__delete(sl); |
| 216 | return NULL; |
| 217 | } |
| 218 | return sl; |
| 219 | } |
| 220 | |
| 221 | /* Get current perf-probe event names */ |
| 222 | struct strlist *probe_file__get_namelist(int fd) |
| 223 | { |
| 224 | return __probe_file__get_namelist(fd, false); |
| 225 | } |
| 226 | |
| 227 | int probe_file__add_event(int fd, struct probe_trace_event *tev) |
| 228 | { |
| 229 | int ret = 0; |
| 230 | char *buf = synthesize_probe_trace_command(tev); |
| 231 | char sbuf[STRERR_BUFSIZE]; |
| 232 | |
| 233 | if (!buf) { |
| 234 | pr_debug("Failed to synthesize probe trace event.\n"); |
| 235 | return -EINVAL; |
| 236 | } |
| 237 | |
| 238 | pr_debug("Writing event: %s\n", buf); |
| 239 | if (!probe_event_dry_run) { |
Masami Hiramatsu | 6ed0720 | 2016-04-26 18:03:04 +0900 | [diff] [blame] | 240 | if (write(fd, buf, strlen(buf)) < (int)strlen(buf)) { |
Masami Hiramatsu | 92f6c72 | 2015-07-15 18:14:07 +0900 | [diff] [blame] | 241 | ret = -errno; |
| 242 | pr_warning("Failed to write event: %s\n", |
Arnaldo Carvalho de Melo | c8b5f2c | 2016-07-06 11:56:20 -0300 | [diff] [blame] | 243 | str_error_r(errno, sbuf, sizeof(sbuf))); |
Masami Hiramatsu | 92f6c72 | 2015-07-15 18:14:07 +0900 | [diff] [blame] | 244 | } |
| 245 | } |
| 246 | free(buf); |
| 247 | |
| 248 | return ret; |
| 249 | } |
| 250 | |
| 251 | static int __del_trace_probe_event(int fd, struct str_node *ent) |
| 252 | { |
| 253 | char *p; |
| 254 | char buf[128]; |
| 255 | int ret; |
| 256 | |
| 257 | /* Convert from perf-probe event to trace-probe event */ |
| 258 | ret = e_snprintf(buf, 128, "-:%s", ent->s); |
| 259 | if (ret < 0) |
| 260 | goto error; |
| 261 | |
| 262 | p = strchr(buf + 2, ':'); |
| 263 | if (!p) { |
| 264 | pr_debug("Internal error: %s should have ':' but not.\n", |
| 265 | ent->s); |
| 266 | ret = -ENOTSUP; |
| 267 | goto error; |
| 268 | } |
| 269 | *p = '/'; |
| 270 | |
| 271 | pr_debug("Writing event: %s\n", buf); |
| 272 | ret = write(fd, buf, strlen(buf)); |
| 273 | if (ret < 0) { |
| 274 | ret = -errno; |
| 275 | goto error; |
| 276 | } |
| 277 | |
Masami Hiramatsu | 92f6c72 | 2015-07-15 18:14:07 +0900 | [diff] [blame] | 278 | return 0; |
| 279 | error: |
| 280 | pr_warning("Failed to delete event: %s\n", |
Arnaldo Carvalho de Melo | c8b5f2c | 2016-07-06 11:56:20 -0300 | [diff] [blame] | 281 | str_error_r(-ret, buf, sizeof(buf))); |
Masami Hiramatsu | 92f6c72 | 2015-07-15 18:14:07 +0900 | [diff] [blame] | 282 | return ret; |
| 283 | } |
| 284 | |
Namhyung Kim | e607f14 | 2015-09-04 21:16:03 +0900 | [diff] [blame] | 285 | int probe_file__get_events(int fd, struct strfilter *filter, |
| 286 | struct strlist *plist) |
Masami Hiramatsu | 92f6c72 | 2015-07-15 18:14:07 +0900 | [diff] [blame] | 287 | { |
| 288 | struct strlist *namelist; |
| 289 | struct str_node *ent; |
| 290 | const char *p; |
| 291 | int ret = -ENOENT; |
| 292 | |
Wang Nan | 421fd08 | 2015-11-06 09:50:15 +0000 | [diff] [blame] | 293 | if (!plist) |
| 294 | return -EINVAL; |
| 295 | |
Masami Hiramatsu | 92f6c72 | 2015-07-15 18:14:07 +0900 | [diff] [blame] | 296 | namelist = __probe_file__get_namelist(fd, true); |
| 297 | if (!namelist) |
| 298 | return -ENOENT; |
| 299 | |
Arnaldo Carvalho de Melo | 602a1f4 | 2016-06-23 11:31:20 -0300 | [diff] [blame] | 300 | strlist__for_each_entry(ent, namelist) { |
Masami Hiramatsu | 92f6c72 | 2015-07-15 18:14:07 +0900 | [diff] [blame] | 301 | p = strchr(ent->s, ':'); |
| 302 | if ((p && strfilter__compare(filter, p + 1)) || |
| 303 | strfilter__compare(filter, ent->s)) { |
Namhyung Kim | e7895e4 | 2015-09-04 21:16:02 +0900 | [diff] [blame] | 304 | strlist__add(plist, ent->s); |
| 305 | ret = 0; |
Masami Hiramatsu | 92f6c72 | 2015-07-15 18:14:07 +0900 | [diff] [blame] | 306 | } |
| 307 | } |
| 308 | strlist__delete(namelist); |
| 309 | |
| 310 | return ret; |
| 311 | } |
Namhyung Kim | e7895e4 | 2015-09-04 21:16:02 +0900 | [diff] [blame] | 312 | |
Namhyung Kim | e607f14 | 2015-09-04 21:16:03 +0900 | [diff] [blame] | 313 | int probe_file__del_strlist(int fd, struct strlist *namelist) |
Namhyung Kim | e7895e4 | 2015-09-04 21:16:02 +0900 | [diff] [blame] | 314 | { |
| 315 | int ret = 0; |
| 316 | struct str_node *ent; |
| 317 | |
Arnaldo Carvalho de Melo | 602a1f4 | 2016-06-23 11:31:20 -0300 | [diff] [blame] | 318 | strlist__for_each_entry(ent, namelist) { |
Namhyung Kim | e7895e4 | 2015-09-04 21:16:02 +0900 | [diff] [blame] | 319 | ret = __del_trace_probe_event(fd, ent); |
| 320 | if (ret < 0) |
| 321 | break; |
| 322 | } |
| 323 | return ret; |
| 324 | } |
| 325 | |
| 326 | int probe_file__del_events(int fd, struct strfilter *filter) |
| 327 | { |
| 328 | struct strlist *namelist; |
| 329 | int ret; |
| 330 | |
| 331 | namelist = strlist__new(NULL, NULL); |
| 332 | if (!namelist) |
| 333 | return -ENOMEM; |
| 334 | |
| 335 | ret = probe_file__get_events(fd, filter, namelist); |
| 336 | if (ret < 0) |
| 337 | return ret; |
| 338 | |
| 339 | ret = probe_file__del_strlist(fd, namelist); |
| 340 | strlist__delete(namelist); |
| 341 | |
| 342 | return ret; |
| 343 | } |
Masami Hiramatsu | dd97549 | 2016-06-15 12:28:30 +0900 | [diff] [blame] | 344 | |
| 345 | /* Caller must ensure to remove this entry from list */ |
| 346 | static void probe_cache_entry__delete(struct probe_cache_entry *entry) |
| 347 | { |
| 348 | if (entry) { |
| 349 | BUG_ON(!list_empty(&entry->node)); |
| 350 | |
| 351 | strlist__delete(entry->tevlist); |
| 352 | clear_perf_probe_event(&entry->pev); |
| 353 | zfree(&entry->spev); |
| 354 | free(entry); |
| 355 | } |
| 356 | } |
| 357 | |
| 358 | static struct probe_cache_entry * |
| 359 | probe_cache_entry__new(struct perf_probe_event *pev) |
| 360 | { |
| 361 | struct probe_cache_entry *entry = zalloc(sizeof(*entry)); |
| 362 | |
| 363 | if (entry) { |
| 364 | INIT_LIST_HEAD(&entry->node); |
| 365 | entry->tevlist = strlist__new(NULL, NULL); |
| 366 | if (!entry->tevlist) |
| 367 | zfree(&entry); |
| 368 | else if (pev) { |
| 369 | entry->spev = synthesize_perf_probe_command(pev); |
| 370 | if (!entry->spev || |
| 371 | perf_probe_event__copy(&entry->pev, pev) < 0) { |
| 372 | probe_cache_entry__delete(entry); |
| 373 | return NULL; |
| 374 | } |
| 375 | } |
| 376 | } |
| 377 | |
| 378 | return entry; |
| 379 | } |
| 380 | |
Masami Hiramatsu | 42bba26 | 2016-07-12 19:05:18 +0900 | [diff] [blame] | 381 | int probe_cache_entry__get_event(struct probe_cache_entry *entry, |
| 382 | struct probe_trace_event **tevs) |
| 383 | { |
| 384 | struct probe_trace_event *tev; |
| 385 | struct str_node *node; |
| 386 | int ret, i; |
| 387 | |
| 388 | ret = strlist__nr_entries(entry->tevlist); |
| 389 | if (ret > probe_conf.max_probes) |
| 390 | return -E2BIG; |
| 391 | |
| 392 | *tevs = zalloc(ret * sizeof(*tev)); |
| 393 | if (!*tevs) |
| 394 | return -ENOMEM; |
| 395 | |
| 396 | i = 0; |
| 397 | strlist__for_each_entry(node, entry->tevlist) { |
| 398 | tev = &(*tevs)[i++]; |
| 399 | ret = parse_probe_trace_command(node->s, tev); |
| 400 | if (ret < 0) |
| 401 | break; |
| 402 | } |
| 403 | return i; |
| 404 | } |
| 405 | |
| 406 | /* For the kernel probe caches, pass target = NULL or DSO__NAME_KALLSYMS */ |
Masami Hiramatsu | dd97549 | 2016-06-15 12:28:30 +0900 | [diff] [blame] | 407 | static int probe_cache__open(struct probe_cache *pcache, const char *target) |
| 408 | { |
| 409 | char cpath[PATH_MAX]; |
| 410 | char sbuildid[SBUILD_ID_SIZE]; |
Masami Hiramatsu | 1f3736c | 2016-07-01 17:03:26 +0900 | [diff] [blame] | 411 | char *dir_name = NULL; |
Masami Hiramatsu | 42bba26 | 2016-07-12 19:05:18 +0900 | [diff] [blame] | 412 | bool is_kallsyms = false; |
Masami Hiramatsu | dd97549 | 2016-06-15 12:28:30 +0900 | [diff] [blame] | 413 | int ret, fd; |
| 414 | |
Masami Hiramatsu | 1f3736c | 2016-07-01 17:03:26 +0900 | [diff] [blame] | 415 | if (target && build_id_cache__cached(target)) { |
| 416 | /* This is a cached buildid */ |
| 417 | strncpy(sbuildid, target, SBUILD_ID_SIZE); |
| 418 | dir_name = build_id_cache__linkname(sbuildid, NULL, 0); |
| 419 | goto found; |
| 420 | } |
| 421 | |
Masami Hiramatsu | 42bba26 | 2016-07-12 19:05:18 +0900 | [diff] [blame] | 422 | if (!target || !strcmp(target, DSO__NAME_KALLSYMS)) { |
Masami Hiramatsu | dd97549 | 2016-06-15 12:28:30 +0900 | [diff] [blame] | 423 | target = DSO__NAME_KALLSYMS; |
Masami Hiramatsu | 42bba26 | 2016-07-12 19:05:18 +0900 | [diff] [blame] | 424 | is_kallsyms = true; |
Masami Hiramatsu | dd97549 | 2016-06-15 12:28:30 +0900 | [diff] [blame] | 425 | ret = sysfs__sprintf_build_id("/", sbuildid); |
Masami Hiramatsu | 42bba26 | 2016-07-12 19:05:18 +0900 | [diff] [blame] | 426 | } else |
| 427 | ret = filename__sprintf_build_id(target, sbuildid); |
| 428 | |
Masami Hiramatsu | dd97549 | 2016-06-15 12:28:30 +0900 | [diff] [blame] | 429 | if (ret < 0) { |
| 430 | pr_debug("Failed to get build-id from %s.\n", target); |
| 431 | return ret; |
| 432 | } |
| 433 | |
| 434 | /* If we have no buildid cache, make it */ |
| 435 | if (!build_id_cache__cached(sbuildid)) { |
| 436 | ret = build_id_cache__add_s(sbuildid, target, |
| 437 | is_kallsyms, NULL); |
| 438 | if (ret < 0) { |
| 439 | pr_debug("Failed to add build-id cache: %s\n", target); |
| 440 | return ret; |
| 441 | } |
| 442 | } |
| 443 | |
| 444 | dir_name = build_id_cache__cachedir(sbuildid, target, is_kallsyms, |
| 445 | false); |
Masami Hiramatsu | 1f3736c | 2016-07-01 17:03:26 +0900 | [diff] [blame] | 446 | found: |
| 447 | if (!dir_name) { |
| 448 | pr_debug("Failed to get cache from %s\n", target); |
Masami Hiramatsu | dd97549 | 2016-06-15 12:28:30 +0900 | [diff] [blame] | 449 | return -ENOMEM; |
Masami Hiramatsu | 1f3736c | 2016-07-01 17:03:26 +0900 | [diff] [blame] | 450 | } |
Masami Hiramatsu | dd97549 | 2016-06-15 12:28:30 +0900 | [diff] [blame] | 451 | |
| 452 | snprintf(cpath, PATH_MAX, "%s/probes", dir_name); |
| 453 | fd = open(cpath, O_CREAT | O_RDWR, 0644); |
| 454 | if (fd < 0) |
| 455 | pr_debug("Failed to open cache(%d): %s\n", fd, cpath); |
| 456 | free(dir_name); |
| 457 | pcache->fd = fd; |
| 458 | |
| 459 | return fd; |
| 460 | } |
| 461 | |
| 462 | static int probe_cache__load(struct probe_cache *pcache) |
| 463 | { |
| 464 | struct probe_cache_entry *entry = NULL; |
| 465 | char buf[MAX_CMDLEN], *p; |
Colin Ian King | 0325862 | 2016-08-12 22:44:56 +0100 | [diff] [blame] | 466 | int ret = 0, fddup; |
Masami Hiramatsu | dd97549 | 2016-06-15 12:28:30 +0900 | [diff] [blame] | 467 | FILE *fp; |
| 468 | |
Colin Ian King | 0325862 | 2016-08-12 22:44:56 +0100 | [diff] [blame] | 469 | fddup = dup(pcache->fd); |
| 470 | if (fddup < 0) |
| 471 | return -errno; |
| 472 | fp = fdopen(fddup, "r"); |
Arnaldo Carvalho de Melo | 60ebc15 | 2016-08-15 17:06:47 -0300 | [diff] [blame] | 473 | if (!fp) { |
| 474 | close(fddup); |
Masami Hiramatsu | dd97549 | 2016-06-15 12:28:30 +0900 | [diff] [blame] | 475 | return -EINVAL; |
Arnaldo Carvalho de Melo | 60ebc15 | 2016-08-15 17:06:47 -0300 | [diff] [blame] | 476 | } |
Masami Hiramatsu | dd97549 | 2016-06-15 12:28:30 +0900 | [diff] [blame] | 477 | |
| 478 | while (!feof(fp)) { |
| 479 | if (!fgets(buf, MAX_CMDLEN, fp)) |
| 480 | break; |
| 481 | p = strchr(buf, '\n'); |
| 482 | if (p) |
| 483 | *p = '\0'; |
Masami Hiramatsu | 6430a94 | 2016-07-01 17:04:10 +0900 | [diff] [blame] | 484 | /* #perf_probe_event or %sdt_event */ |
| 485 | if (buf[0] == '#' || buf[0] == '%') { |
Masami Hiramatsu | dd97549 | 2016-06-15 12:28:30 +0900 | [diff] [blame] | 486 | entry = probe_cache_entry__new(NULL); |
| 487 | if (!entry) { |
| 488 | ret = -ENOMEM; |
| 489 | goto out; |
| 490 | } |
Masami Hiramatsu | 6430a94 | 2016-07-01 17:04:10 +0900 | [diff] [blame] | 491 | if (buf[0] == '%') |
| 492 | entry->sdt = true; |
Masami Hiramatsu | dd97549 | 2016-06-15 12:28:30 +0900 | [diff] [blame] | 493 | entry->spev = strdup(buf + 1); |
| 494 | if (entry->spev) |
| 495 | ret = parse_perf_probe_command(buf + 1, |
| 496 | &entry->pev); |
| 497 | else |
| 498 | ret = -ENOMEM; |
| 499 | if (ret < 0) { |
| 500 | probe_cache_entry__delete(entry); |
| 501 | goto out; |
| 502 | } |
| 503 | list_add_tail(&entry->node, &pcache->entries); |
| 504 | } else { /* trace_probe_event */ |
| 505 | if (!entry) { |
| 506 | ret = -EINVAL; |
| 507 | goto out; |
| 508 | } |
| 509 | strlist__add(entry->tevlist, buf); |
| 510 | } |
| 511 | } |
| 512 | out: |
| 513 | fclose(fp); |
| 514 | return ret; |
| 515 | } |
| 516 | |
| 517 | static struct probe_cache *probe_cache__alloc(void) |
| 518 | { |
| 519 | struct probe_cache *pcache = zalloc(sizeof(*pcache)); |
| 520 | |
| 521 | if (pcache) { |
| 522 | INIT_LIST_HEAD(&pcache->entries); |
| 523 | pcache->fd = -EINVAL; |
| 524 | } |
| 525 | return pcache; |
| 526 | } |
| 527 | |
| 528 | void probe_cache__purge(struct probe_cache *pcache) |
| 529 | { |
| 530 | struct probe_cache_entry *entry, *n; |
| 531 | |
| 532 | list_for_each_entry_safe(entry, n, &pcache->entries, node) { |
| 533 | list_del_init(&entry->node); |
| 534 | probe_cache_entry__delete(entry); |
| 535 | } |
| 536 | } |
| 537 | |
| 538 | void probe_cache__delete(struct probe_cache *pcache) |
| 539 | { |
| 540 | if (!pcache) |
| 541 | return; |
| 542 | |
| 543 | probe_cache__purge(pcache); |
| 544 | if (pcache->fd > 0) |
| 545 | close(pcache->fd); |
| 546 | free(pcache); |
| 547 | } |
| 548 | |
| 549 | struct probe_cache *probe_cache__new(const char *target) |
| 550 | { |
| 551 | struct probe_cache *pcache = probe_cache__alloc(); |
| 552 | int ret; |
| 553 | |
| 554 | if (!pcache) |
| 555 | return NULL; |
| 556 | |
| 557 | ret = probe_cache__open(pcache, target); |
| 558 | if (ret < 0) { |
| 559 | pr_debug("Cache open error: %d\n", ret); |
| 560 | goto out_err; |
| 561 | } |
| 562 | |
| 563 | ret = probe_cache__load(pcache); |
| 564 | if (ret < 0) { |
| 565 | pr_debug("Cache read error: %d\n", ret); |
| 566 | goto out_err; |
| 567 | } |
| 568 | |
| 569 | return pcache; |
| 570 | |
| 571 | out_err: |
| 572 | probe_cache__delete(pcache); |
| 573 | return NULL; |
| 574 | } |
| 575 | |
| 576 | static bool streql(const char *a, const char *b) |
| 577 | { |
| 578 | if (a == b) |
| 579 | return true; |
| 580 | |
| 581 | if (!a || !b) |
| 582 | return false; |
| 583 | |
| 584 | return !strcmp(a, b); |
| 585 | } |
| 586 | |
Masami Hiramatsu | bc06223 | 2016-07-01 17:03:12 +0900 | [diff] [blame] | 587 | struct probe_cache_entry * |
Masami Hiramatsu | dd97549 | 2016-06-15 12:28:30 +0900 | [diff] [blame] | 588 | probe_cache__find(struct probe_cache *pcache, struct perf_probe_event *pev) |
| 589 | { |
| 590 | struct probe_cache_entry *entry = NULL; |
| 591 | char *cmd = synthesize_perf_probe_command(pev); |
| 592 | |
| 593 | if (!cmd) |
| 594 | return NULL; |
| 595 | |
Masami Hiramatsu | 05bf2c8 | 2016-07-12 19:05:04 +0900 | [diff] [blame] | 596 | for_each_probe_cache_entry(entry, pcache) { |
Masami Hiramatsu | 36a009f | 2016-07-12 19:04:43 +0900 | [diff] [blame] | 597 | if (pev->sdt) { |
| 598 | if (entry->pev.event && |
| 599 | streql(entry->pev.event, pev->event) && |
| 600 | (!pev->group || |
| 601 | streql(entry->pev.group, pev->group))) |
| 602 | goto found; |
| 603 | |
| 604 | continue; |
| 605 | } |
Masami Hiramatsu | dd97549 | 2016-06-15 12:28:30 +0900 | [diff] [blame] | 606 | /* Hit if same event name or same command-string */ |
| 607 | if ((pev->event && |
| 608 | (streql(entry->pev.group, pev->group) && |
| 609 | streql(entry->pev.event, pev->event))) || |
| 610 | (!strcmp(entry->spev, cmd))) |
| 611 | goto found; |
| 612 | } |
| 613 | entry = NULL; |
| 614 | |
| 615 | found: |
| 616 | free(cmd); |
| 617 | return entry; |
| 618 | } |
| 619 | |
Masami Hiramatsu | bc06223 | 2016-07-01 17:03:12 +0900 | [diff] [blame] | 620 | struct probe_cache_entry * |
| 621 | probe_cache__find_by_name(struct probe_cache *pcache, |
| 622 | const char *group, const char *event) |
| 623 | { |
| 624 | struct probe_cache_entry *entry = NULL; |
| 625 | |
Masami Hiramatsu | 05bf2c8 | 2016-07-12 19:05:04 +0900 | [diff] [blame] | 626 | for_each_probe_cache_entry(entry, pcache) { |
Masami Hiramatsu | bc06223 | 2016-07-01 17:03:12 +0900 | [diff] [blame] | 627 | /* Hit if same event name or same command-string */ |
| 628 | if (streql(entry->pev.group, group) && |
| 629 | streql(entry->pev.event, event)) |
| 630 | goto found; |
| 631 | } |
| 632 | entry = NULL; |
| 633 | |
| 634 | found: |
| 635 | return entry; |
| 636 | } |
| 637 | |
Masami Hiramatsu | dd97549 | 2016-06-15 12:28:30 +0900 | [diff] [blame] | 638 | int probe_cache__add_entry(struct probe_cache *pcache, |
| 639 | struct perf_probe_event *pev, |
| 640 | struct probe_trace_event *tevs, int ntevs) |
| 641 | { |
| 642 | struct probe_cache_entry *entry = NULL; |
| 643 | char *command; |
| 644 | int i, ret = 0; |
| 645 | |
| 646 | if (!pcache || !pev || !tevs || ntevs <= 0) { |
| 647 | ret = -EINVAL; |
| 648 | goto out_err; |
| 649 | } |
| 650 | |
| 651 | /* Remove old cache entry */ |
| 652 | entry = probe_cache__find(pcache, pev); |
| 653 | if (entry) { |
| 654 | list_del_init(&entry->node); |
| 655 | probe_cache_entry__delete(entry); |
| 656 | } |
| 657 | |
| 658 | ret = -ENOMEM; |
| 659 | entry = probe_cache_entry__new(pev); |
| 660 | if (!entry) |
| 661 | goto out_err; |
| 662 | |
| 663 | for (i = 0; i < ntevs; i++) { |
| 664 | if (!tevs[i].point.symbol) |
| 665 | continue; |
| 666 | |
| 667 | command = synthesize_probe_trace_command(&tevs[i]); |
| 668 | if (!command) |
| 669 | goto out_err; |
| 670 | strlist__add(entry->tevlist, command); |
| 671 | free(command); |
| 672 | } |
| 673 | list_add_tail(&entry->node, &pcache->entries); |
| 674 | pr_debug("Added probe cache: %d\n", ntevs); |
| 675 | return 0; |
| 676 | |
| 677 | out_err: |
| 678 | pr_debug("Failed to add probe caches\n"); |
| 679 | probe_cache_entry__delete(entry); |
| 680 | return ret; |
| 681 | } |
| 682 | |
Arnaldo Carvalho de Melo | 1c1a3a4 | 2016-07-12 12:19:09 -0300 | [diff] [blame] | 683 | #ifdef HAVE_GELF_GETNOTE_SUPPORT |
Masami Hiramatsu | 6430a94 | 2016-07-01 17:04:10 +0900 | [diff] [blame] | 684 | static unsigned long long sdt_note__get_addr(struct sdt_note *note) |
| 685 | { |
| 686 | return note->bit32 ? (unsigned long long)note->addr.a32[0] |
| 687 | : (unsigned long long)note->addr.a64[0]; |
| 688 | } |
| 689 | |
| 690 | int probe_cache__scan_sdt(struct probe_cache *pcache, const char *pathname) |
| 691 | { |
| 692 | struct probe_cache_entry *entry = NULL; |
| 693 | struct list_head sdtlist; |
| 694 | struct sdt_note *note; |
| 695 | char *buf; |
| 696 | char sdtgrp[64]; |
| 697 | int ret; |
| 698 | |
| 699 | INIT_LIST_HEAD(&sdtlist); |
| 700 | ret = get_sdt_note_list(&sdtlist, pathname); |
| 701 | if (ret < 0) { |
Adrian Hunter | f965520 | 2016-09-23 17:38:40 +0300 | [diff] [blame] | 702 | pr_debug4("Failed to get sdt note: %d\n", ret); |
Masami Hiramatsu | 6430a94 | 2016-07-01 17:04:10 +0900 | [diff] [blame] | 703 | return ret; |
| 704 | } |
| 705 | list_for_each_entry(note, &sdtlist, note_list) { |
| 706 | ret = snprintf(sdtgrp, 64, "sdt_%s", note->provider); |
| 707 | if (ret < 0) |
| 708 | break; |
| 709 | /* Try to find same-name entry */ |
| 710 | entry = probe_cache__find_by_name(pcache, sdtgrp, note->name); |
| 711 | if (!entry) { |
| 712 | entry = probe_cache_entry__new(NULL); |
| 713 | if (!entry) { |
| 714 | ret = -ENOMEM; |
| 715 | break; |
| 716 | } |
| 717 | entry->sdt = true; |
| 718 | ret = asprintf(&entry->spev, "%s:%s=%s", sdtgrp, |
| 719 | note->name, note->name); |
| 720 | if (ret < 0) |
| 721 | break; |
| 722 | entry->pev.event = strdup(note->name); |
| 723 | entry->pev.group = strdup(sdtgrp); |
| 724 | list_add_tail(&entry->node, &pcache->entries); |
| 725 | } |
| 726 | ret = asprintf(&buf, "p:%s/%s %s:0x%llx", |
| 727 | sdtgrp, note->name, pathname, |
| 728 | sdt_note__get_addr(note)); |
| 729 | if (ret < 0) |
| 730 | break; |
| 731 | strlist__add(entry->tevlist, buf); |
| 732 | free(buf); |
| 733 | entry = NULL; |
| 734 | } |
| 735 | if (entry) { |
| 736 | list_del_init(&entry->node); |
| 737 | probe_cache_entry__delete(entry); |
| 738 | } |
| 739 | cleanup_sdt_note_list(&sdtlist); |
| 740 | return ret; |
| 741 | } |
Arnaldo Carvalho de Melo | 1c1a3a4 | 2016-07-12 12:19:09 -0300 | [diff] [blame] | 742 | #endif |
Masami Hiramatsu | 6430a94 | 2016-07-01 17:04:10 +0900 | [diff] [blame] | 743 | |
Masami Hiramatsu | dd97549 | 2016-06-15 12:28:30 +0900 | [diff] [blame] | 744 | static int probe_cache_entry__write(struct probe_cache_entry *entry, int fd) |
| 745 | { |
| 746 | struct str_node *snode; |
| 747 | struct stat st; |
| 748 | struct iovec iov[3]; |
Masami Hiramatsu | 6430a94 | 2016-07-01 17:04:10 +0900 | [diff] [blame] | 749 | const char *prefix = entry->sdt ? "%" : "#"; |
Masami Hiramatsu | dd97549 | 2016-06-15 12:28:30 +0900 | [diff] [blame] | 750 | int ret; |
| 751 | /* Save stat for rollback */ |
| 752 | ret = fstat(fd, &st); |
| 753 | if (ret < 0) |
| 754 | return ret; |
| 755 | |
Masami Hiramatsu | 6430a94 | 2016-07-01 17:04:10 +0900 | [diff] [blame] | 756 | pr_debug("Writing cache: %s%s\n", prefix, entry->spev); |
| 757 | iov[0].iov_base = (void *)prefix; iov[0].iov_len = 1; |
Masami Hiramatsu | dd97549 | 2016-06-15 12:28:30 +0900 | [diff] [blame] | 758 | iov[1].iov_base = entry->spev; iov[1].iov_len = strlen(entry->spev); |
| 759 | iov[2].iov_base = (void *)"\n"; iov[2].iov_len = 1; |
| 760 | ret = writev(fd, iov, 3); |
| 761 | if (ret < (int)iov[1].iov_len + 2) |
| 762 | goto rollback; |
| 763 | |
Arnaldo Carvalho de Melo | 602a1f4 | 2016-06-23 11:31:20 -0300 | [diff] [blame] | 764 | strlist__for_each_entry(snode, entry->tevlist) { |
Masami Hiramatsu | dd97549 | 2016-06-15 12:28:30 +0900 | [diff] [blame] | 765 | iov[0].iov_base = (void *)snode->s; |
| 766 | iov[0].iov_len = strlen(snode->s); |
| 767 | iov[1].iov_base = (void *)"\n"; iov[1].iov_len = 1; |
| 768 | ret = writev(fd, iov, 2); |
| 769 | if (ret < (int)iov[0].iov_len + 1) |
| 770 | goto rollback; |
| 771 | } |
| 772 | return 0; |
| 773 | |
| 774 | rollback: |
| 775 | /* Rollback to avoid cache file corruption */ |
| 776 | if (ret > 0) |
| 777 | ret = -1; |
| 778 | if (ftruncate(fd, st.st_size) < 0) |
| 779 | ret = -2; |
| 780 | |
| 781 | return ret; |
| 782 | } |
| 783 | |
| 784 | int probe_cache__commit(struct probe_cache *pcache) |
| 785 | { |
| 786 | struct probe_cache_entry *entry; |
| 787 | int ret = 0; |
| 788 | |
| 789 | /* TBD: if we do not update existing entries, skip it */ |
| 790 | ret = lseek(pcache->fd, 0, SEEK_SET); |
| 791 | if (ret < 0) |
| 792 | goto out; |
| 793 | |
| 794 | ret = ftruncate(pcache->fd, 0); |
| 795 | if (ret < 0) |
| 796 | goto out; |
| 797 | |
Masami Hiramatsu | 05bf2c8 | 2016-07-12 19:05:04 +0900 | [diff] [blame] | 798 | for_each_probe_cache_entry(entry, pcache) { |
Masami Hiramatsu | dd97549 | 2016-06-15 12:28:30 +0900 | [diff] [blame] | 799 | ret = probe_cache_entry__write(entry, pcache->fd); |
| 800 | pr_debug("Cache committed: %d\n", ret); |
| 801 | if (ret < 0) |
| 802 | break; |
| 803 | } |
| 804 | out: |
| 805 | return ret; |
| 806 | } |
Masami Hiramatsu | 1f3736c | 2016-07-01 17:03:26 +0900 | [diff] [blame] | 807 | |
Masami Hiramatsu | 4a0f65c | 2016-07-01 17:03:36 +0900 | [diff] [blame] | 808 | static bool probe_cache_entry__compare(struct probe_cache_entry *entry, |
| 809 | struct strfilter *filter) |
| 810 | { |
| 811 | char buf[128], *ptr = entry->spev; |
| 812 | |
| 813 | if (entry->pev.event) { |
| 814 | snprintf(buf, 128, "%s:%s", entry->pev.group, entry->pev.event); |
| 815 | ptr = buf; |
| 816 | } |
| 817 | return strfilter__compare(filter, ptr); |
| 818 | } |
| 819 | |
| 820 | int probe_cache__filter_purge(struct probe_cache *pcache, |
| 821 | struct strfilter *filter) |
| 822 | { |
| 823 | struct probe_cache_entry *entry, *tmp; |
| 824 | |
| 825 | list_for_each_entry_safe(entry, tmp, &pcache->entries, node) { |
| 826 | if (probe_cache_entry__compare(entry, filter)) { |
| 827 | pr_info("Removed cached event: %s\n", entry->spev); |
| 828 | list_del_init(&entry->node); |
| 829 | probe_cache_entry__delete(entry); |
| 830 | } |
| 831 | } |
| 832 | return 0; |
| 833 | } |
| 834 | |
Masami Hiramatsu | 1f3736c | 2016-07-01 17:03:26 +0900 | [diff] [blame] | 835 | static int probe_cache__show_entries(struct probe_cache *pcache, |
| 836 | struct strfilter *filter) |
| 837 | { |
| 838 | struct probe_cache_entry *entry; |
Masami Hiramatsu | 1f3736c | 2016-07-01 17:03:26 +0900 | [diff] [blame] | 839 | |
Masami Hiramatsu | 05bf2c8 | 2016-07-12 19:05:04 +0900 | [diff] [blame] | 840 | for_each_probe_cache_entry(entry, pcache) { |
Masami Hiramatsu | 4a0f65c | 2016-07-01 17:03:36 +0900 | [diff] [blame] | 841 | if (probe_cache_entry__compare(entry, filter)) |
Masami Hiramatsu | 1f3736c | 2016-07-01 17:03:26 +0900 | [diff] [blame] | 842 | printf("%s\n", entry->spev); |
| 843 | } |
| 844 | return 0; |
| 845 | } |
| 846 | |
| 847 | /* Show all cached probes */ |
| 848 | int probe_cache__show_all_caches(struct strfilter *filter) |
| 849 | { |
| 850 | struct probe_cache *pcache; |
| 851 | struct strlist *bidlist; |
| 852 | struct str_node *nd; |
| 853 | char *buf = strfilter__string(filter); |
| 854 | |
| 855 | pr_debug("list cache with filter: %s\n", buf); |
| 856 | free(buf); |
| 857 | |
Masami Hiramatsu | c3492a3 | 2016-07-12 19:04:54 +0900 | [diff] [blame] | 858 | bidlist = build_id_cache__list_all(true); |
Masami Hiramatsu | 1f3736c | 2016-07-01 17:03:26 +0900 | [diff] [blame] | 859 | if (!bidlist) { |
| 860 | pr_debug("Failed to get buildids: %d\n", errno); |
| 861 | return -EINVAL; |
| 862 | } |
| 863 | strlist__for_each_entry(nd, bidlist) { |
| 864 | pcache = probe_cache__new(nd->s); |
| 865 | if (!pcache) |
| 866 | continue; |
| 867 | if (!list_empty(&pcache->entries)) { |
| 868 | buf = build_id_cache__origname(nd->s); |
| 869 | printf("%s (%s):\n", buf, nd->s); |
| 870 | free(buf); |
| 871 | probe_cache__show_entries(pcache, filter); |
| 872 | } |
| 873 | probe_cache__delete(pcache); |
| 874 | } |
| 875 | strlist__delete(bidlist); |
| 876 | |
| 877 | return 0; |
| 878 | } |
Masami Hiramatsu | 180b206 | 2016-08-18 17:58:31 +0900 | [diff] [blame] | 879 | |
| 880 | static struct { |
| 881 | const char *pattern; |
| 882 | bool avail; |
| 883 | bool checked; |
| 884 | } probe_type_table[] = { |
| 885 | #define DEFINE_TYPE(idx, pat, def_avail) \ |
| 886 | [idx] = {.pattern = pat, .avail = (def_avail)} |
| 887 | DEFINE_TYPE(PROBE_TYPE_U, "* u8/16/32/64,*", true), |
| 888 | DEFINE_TYPE(PROBE_TYPE_S, "* s8/16/32/64,*", true), |
| 889 | DEFINE_TYPE(PROBE_TYPE_X, "* x8/16/32/64,*", false), |
| 890 | DEFINE_TYPE(PROBE_TYPE_STRING, "* string,*", true), |
| 891 | DEFINE_TYPE(PROBE_TYPE_BITFIELD, |
| 892 | "* b<bit-width>@<bit-offset>/<container-size>", true), |
| 893 | }; |
| 894 | |
| 895 | bool probe_type_is_available(enum probe_type type) |
| 896 | { |
| 897 | FILE *fp; |
| 898 | char *buf = NULL; |
| 899 | size_t len = 0; |
| 900 | bool target_line = false; |
| 901 | bool ret = probe_type_table[type].avail; |
| 902 | |
| 903 | if (type >= PROBE_TYPE_END) |
| 904 | return false; |
| 905 | /* We don't have to check the type which supported by default */ |
| 906 | if (ret || probe_type_table[type].checked) |
| 907 | return ret; |
| 908 | |
| 909 | if (asprintf(&buf, "%s/README", tracing_path) < 0) |
| 910 | return ret; |
| 911 | |
| 912 | fp = fopen(buf, "r"); |
| 913 | if (!fp) |
| 914 | goto end; |
| 915 | |
| 916 | zfree(&buf); |
| 917 | while (getline(&buf, &len, fp) > 0 && !ret) { |
| 918 | if (!target_line) { |
| 919 | target_line = !!strstr(buf, " type: "); |
| 920 | if (!target_line) |
| 921 | continue; |
| 922 | } else if (strstr(buf, "\t ") != buf) |
| 923 | break; |
| 924 | ret = strglobmatch(buf, probe_type_table[type].pattern); |
| 925 | } |
| 926 | /* Cache the result */ |
| 927 | probe_type_table[type].checked = true; |
| 928 | probe_type_table[type].avail = ret; |
| 929 | |
| 930 | fclose(fp); |
| 931 | end: |
| 932 | free(buf); |
| 933 | |
| 934 | return ret; |
| 935 | } |