1 /* 2 * builtin-buildid-cache.c 3 * 4 * Builtin buildid-cache command: Manages build-id cache 5 * 6 * Copyright (C) 2010, Red Hat Inc. 7 * Copyright (C) 2010, Arnaldo Carvalho de Melo <acme@redhat.com> 8 */ 9 #include <sys/types.h> 10 #include <sys/time.h> 11 #include <time.h> 12 #include <dirent.h> 13 #include <unistd.h> 14 #include "builtin.h" 15 #include "perf.h" 16 #include "util/cache.h" 17 #include "util/debug.h" 18 #include "util/header.h" 19 #include "util/parse-options.h" 20 #include "util/strlist.h" 21 #include "util/build-id.h" 22 #include "util/session.h" 23 #include "util/symbol.h" 24 25 static int build_id_cache__kcore_buildid(const char *proc_dir, char *sbuildid) 26 { 27 char root_dir[PATH_MAX]; 28 char notes[PATH_MAX]; 29 u8 build_id[BUILD_ID_SIZE]; 30 char *p; 31 32 strlcpy(root_dir, proc_dir, sizeof(root_dir)); 33 34 p = strrchr(root_dir, '/'); 35 if (!p) 36 return -1; 37 *p = '\0'; 38 39 scnprintf(notes, sizeof(notes), "%s/sys/kernel/notes", root_dir); 40 41 if (sysfs__read_build_id(notes, build_id, sizeof(build_id))) 42 return -1; 43 44 build_id__sprintf(build_id, sizeof(build_id), sbuildid); 45 46 return 0; 47 } 48 49 static int build_id_cache__kcore_dir(char *dir, size_t sz) 50 { 51 struct timeval tv; 52 struct tm tm; 53 char dt[32]; 54 55 if (gettimeofday(&tv, NULL) || !localtime_r(&tv.tv_sec, &tm)) 56 return -1; 57 58 if (!strftime(dt, sizeof(dt), "%Y%m%d%H%M%S", &tm)) 59 return -1; 60 61 scnprintf(dir, sz, "%s%02u", dt, (unsigned)tv.tv_usec / 10000); 62 63 return 0; 64 } 65 66 static int build_id_cache__kcore_existing(const char *from_dir, char *to_dir, 67 size_t to_dir_sz) 68 { 69 char from[PATH_MAX]; 70 char to[PATH_MAX]; 71 struct dirent *dent; 72 int ret = -1; 73 DIR *d; 74 75 d = opendir(to_dir); 76 if (!d) 77 return -1; 78 79 scnprintf(from, sizeof(from), "%s/modules", from_dir); 80 81 while (1) { 82 dent = readdir(d); 83 if (!dent) 84 break; 85 if (dent->d_type != DT_DIR) 86 continue; 87 scnprintf(to, sizeof(to), "%s/%s/modules", to_dir, 88 dent->d_name); 89 if (!compare_proc_modules(from, to)) { 90 scnprintf(to, sizeof(to), "%s/%s", to_dir, 91 dent->d_name); 92 strlcpy(to_dir, to, to_dir_sz); 93 ret = 0; 94 break; 95 } 96 } 97 98 closedir(d); 99 100 return ret; 101 } 102 103 static int build_id_cache__add_kcore(const char *filename, const char *debugdir) 104 { 105 char dir[32], sbuildid[BUILD_ID_SIZE * 2 + 1]; 106 char from_dir[PATH_MAX], to_dir[PATH_MAX]; 107 char *p; 108 109 strlcpy(from_dir, filename, sizeof(from_dir)); 110 111 p = strrchr(from_dir, '/'); 112 if (!p || strcmp(p + 1, "kcore")) 113 return -1; 114 *p = '\0'; 115 116 if (build_id_cache__kcore_buildid(from_dir, sbuildid)) 117 return -1; 118 119 scnprintf(to_dir, sizeof(to_dir), "%s/[kernel.kcore]/%s", 120 debugdir, sbuildid); 121 122 if (!build_id_cache__kcore_existing(from_dir, to_dir, sizeof(to_dir))) { 123 pr_debug("same kcore found in %s\n", to_dir); 124 return 0; 125 } 126 127 if (build_id_cache__kcore_dir(dir, sizeof(dir))) 128 return -1; 129 130 scnprintf(to_dir, sizeof(to_dir), "%s/[kernel.kcore]/%s/%s", 131 debugdir, sbuildid, dir); 132 133 if (mkdir_p(to_dir, 0755)) 134 return -1; 135 136 if (kcore_copy(from_dir, to_dir)) { 137 /* Remove YYYYmmddHHMMSShh directory */ 138 if (!rmdir(to_dir)) { 139 p = strrchr(to_dir, '/'); 140 if (p) 141 *p = '\0'; 142 /* Try to remove buildid directory */ 143 if (!rmdir(to_dir)) { 144 p = strrchr(to_dir, '/'); 145 if (p) 146 *p = '\0'; 147 /* Try to remove [kernel.kcore] directory */ 148 rmdir(to_dir); 149 } 150 } 151 return -1; 152 } 153 154 pr_debug("kcore added to build-id cache directory %s\n", to_dir); 155 156 return 0; 157 } 158 159 static int build_id_cache__add_file(const char *filename, const char *debugdir) 160 { 161 char sbuild_id[BUILD_ID_SIZE * 2 + 1]; 162 u8 build_id[BUILD_ID_SIZE]; 163 int err; 164 165 if (filename__read_build_id(filename, &build_id, sizeof(build_id)) < 0) { 166 pr_debug("Couldn't read a build-id in %s\n", filename); 167 return -1; 168 } 169 170 build_id__sprintf(build_id, sizeof(build_id), sbuild_id); 171 err = build_id_cache__add_s(sbuild_id, debugdir, filename, 172 false, false); 173 if (verbose) 174 pr_info("Adding %s %s: %s\n", sbuild_id, filename, 175 err ? "FAIL" : "Ok"); 176 return err; 177 } 178 179 static int build_id_cache__remove_file(const char *filename, 180 const char *debugdir) 181 { 182 u8 build_id[BUILD_ID_SIZE]; 183 char sbuild_id[BUILD_ID_SIZE * 2 + 1]; 184 185 int err; 186 187 if (filename__read_build_id(filename, &build_id, sizeof(build_id)) < 0) { 188 pr_debug("Couldn't read a build-id in %s\n", filename); 189 return -1; 190 } 191 192 build_id__sprintf(build_id, sizeof(build_id), sbuild_id); 193 err = build_id_cache__remove_s(sbuild_id, debugdir); 194 if (verbose) 195 pr_info("Removing %s %s: %s\n", sbuild_id, filename, 196 err ? "FAIL" : "Ok"); 197 198 return err; 199 } 200 201 static bool dso__missing_buildid_cache(struct dso *dso, int parm __maybe_unused) 202 { 203 char filename[PATH_MAX]; 204 u8 build_id[BUILD_ID_SIZE]; 205 206 if (dso__build_id_filename(dso, filename, sizeof(filename)) && 207 filename__read_build_id(filename, build_id, 208 sizeof(build_id)) != sizeof(build_id)) { 209 if (errno == ENOENT) 210 return false; 211 212 pr_warning("Problems with %s file, consider removing it from the cache\n", 213 filename); 214 } else if (memcmp(dso->build_id, build_id, sizeof(dso->build_id))) { 215 pr_warning("Problems with %s file, consider removing it from the cache\n", 216 filename); 217 } 218 219 return true; 220 } 221 222 static int build_id_cache__fprintf_missing(const char *filename, bool force, FILE *fp) 223 { 224 struct perf_data_file file = { 225 .path = filename, 226 .mode = PERF_DATA_MODE_READ, 227 .force = force, 228 }; 229 struct perf_session *session = perf_session__new(&file, false, NULL); 230 if (session == NULL) 231 return -1; 232 233 perf_session__fprintf_dsos_buildid(session, fp, dso__missing_buildid_cache, 0); 234 perf_session__delete(session); 235 236 return 0; 237 } 238 239 static int build_id_cache__update_file(const char *filename, 240 const char *debugdir) 241 { 242 u8 build_id[BUILD_ID_SIZE]; 243 char sbuild_id[BUILD_ID_SIZE * 2 + 1]; 244 245 int err; 246 247 if (filename__read_build_id(filename, &build_id, sizeof(build_id)) < 0) { 248 pr_debug("Couldn't read a build-id in %s\n", filename); 249 return -1; 250 } 251 252 build_id__sprintf(build_id, sizeof(build_id), sbuild_id); 253 err = build_id_cache__remove_s(sbuild_id, debugdir); 254 if (!err) { 255 err = build_id_cache__add_s(sbuild_id, debugdir, filename, 256 false, false); 257 } 258 if (verbose) 259 pr_info("Updating %s %s: %s\n", sbuild_id, filename, 260 err ? "FAIL" : "Ok"); 261 262 return err; 263 } 264 265 int cmd_buildid_cache(int argc, const char **argv, 266 const char *prefix __maybe_unused) 267 { 268 struct strlist *list; 269 struct str_node *pos; 270 int ret = 0; 271 bool force = false; 272 char debugdir[PATH_MAX]; 273 char const *add_name_list_str = NULL, 274 *remove_name_list_str = NULL, 275 *missing_filename = NULL, 276 *update_name_list_str = NULL, 277 *kcore_filename; 278 279 const struct option buildid_cache_options[] = { 280 OPT_STRING('a', "add", &add_name_list_str, 281 "file list", "file(s) to add"), 282 OPT_STRING('k', "kcore", &kcore_filename, 283 "file", "kcore file to add"), 284 OPT_STRING('r', "remove", &remove_name_list_str, "file list", 285 "file(s) to remove"), 286 OPT_STRING('M', "missing", &missing_filename, "file", 287 "to find missing build ids in the cache"), 288 OPT_BOOLEAN('f', "force", &force, "don't complain, do it"), 289 OPT_STRING('u', "update", &update_name_list_str, "file list", 290 "file(s) to update"), 291 OPT_INCR('v', "verbose", &verbose, "be more verbose"), 292 OPT_END() 293 }; 294 const char * const buildid_cache_usage[] = { 295 "perf buildid-cache [<options>]", 296 NULL 297 }; 298 299 argc = parse_options(argc, argv, buildid_cache_options, 300 buildid_cache_usage, 0); 301 302 if (symbol__init() < 0) 303 return -1; 304 305 setup_pager(); 306 307 snprintf(debugdir, sizeof(debugdir), "%s", buildid_dir); 308 309 if (add_name_list_str) { 310 list = strlist__new(true, add_name_list_str); 311 if (list) { 312 strlist__for_each(pos, list) 313 if (build_id_cache__add_file(pos->s, debugdir)) { 314 if (errno == EEXIST) { 315 pr_debug("%s already in the cache\n", 316 pos->s); 317 continue; 318 } 319 pr_warning("Couldn't add %s: %s\n", 320 pos->s, strerror(errno)); 321 } 322 323 strlist__delete(list); 324 } 325 } 326 327 if (remove_name_list_str) { 328 list = strlist__new(true, remove_name_list_str); 329 if (list) { 330 strlist__for_each(pos, list) 331 if (build_id_cache__remove_file(pos->s, debugdir)) { 332 if (errno == ENOENT) { 333 pr_debug("%s wasn't in the cache\n", 334 pos->s); 335 continue; 336 } 337 pr_warning("Couldn't remove %s: %s\n", 338 pos->s, strerror(errno)); 339 } 340 341 strlist__delete(list); 342 } 343 } 344 345 if (missing_filename) 346 ret = build_id_cache__fprintf_missing(missing_filename, force, stdout); 347 348 if (update_name_list_str) { 349 list = strlist__new(true, update_name_list_str); 350 if (list) { 351 strlist__for_each(pos, list) 352 if (build_id_cache__update_file(pos->s, debugdir)) { 353 if (errno == ENOENT) { 354 pr_debug("%s wasn't in the cache\n", 355 pos->s); 356 continue; 357 } 358 pr_warning("Couldn't update %s: %s\n", 359 pos->s, strerror(errno)); 360 } 361 362 strlist__delete(list); 363 } 364 } 365 366 if (kcore_filename && 367 build_id_cache__add_kcore(kcore_filename, debugdir)) 368 pr_warning("Couldn't add %s\n", kcore_filename); 369 370 return ret; 371 } 372