2 * builtin-buildid-cache.c
4 * Builtin buildid-cache command: Manages build-id cache
6 * Copyright (C) 2010, Red Hat Inc.
7 * Copyright (C) 2010, Arnaldo Carvalho de Melo <acme@redhat.com>
16 #include "util/cache.h"
17 #include "util/debug.h"
18 #include "util/header.h"
19 #include <subcmd/parse-options.h>
20 #include "util/strlist.h"
21 #include "util/build-id.h"
22 #include "util/session.h"
23 #include "util/symbol.h"
25 static int build_id_cache__kcore_buildid(const char *proc_dir, char *sbuildid)
27 char root_dir[PATH_MAX];
30 strlcpy(root_dir, proc_dir, sizeof(root_dir));
32 p = strrchr(root_dir, '/');
36 return sysfs__sprintf_build_id(root_dir, sbuildid);
39 static int build_id_cache__kcore_dir(char *dir, size_t sz)
41 return fetch_current_timestamp(dir, sz);
44 static bool same_kallsyms_reloc(const char *from_dir, char *to_dir)
49 u64 addr1 = 0, addr2 = 0;
52 scnprintf(from, sizeof(from), "%s/kallsyms", from_dir);
53 scnprintf(to, sizeof(to), "%s/kallsyms", to_dir);
55 for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) {
56 addr1 = kallsyms__get_function_start(from, name);
62 addr2 = kallsyms__get_function_start(to, name);
64 return addr1 == addr2;
67 static int build_id_cache__kcore_existing(const char *from_dir, char *to_dir,
72 char to_subdir[PATH_MAX];
81 scnprintf(from, sizeof(from), "%s/modules", from_dir);
87 if (dent->d_type != DT_DIR)
89 scnprintf(to, sizeof(to), "%s/%s/modules", to_dir,
91 scnprintf(to_subdir, sizeof(to_subdir), "%s/%s",
92 to_dir, dent->d_name);
93 if (!compare_proc_modules(from, to) &&
94 same_kallsyms_reloc(from_dir, to_subdir)) {
95 strlcpy(to_dir, to_subdir, to_dir_sz);
106 static int build_id_cache__add_kcore(const char *filename, bool force)
108 char dir[32], sbuildid[SBUILD_ID_SIZE];
109 char from_dir[PATH_MAX], to_dir[PATH_MAX];
112 strlcpy(from_dir, filename, sizeof(from_dir));
114 p = strrchr(from_dir, '/');
115 if (!p || strcmp(p + 1, "kcore"))
119 if (build_id_cache__kcore_buildid(from_dir, sbuildid) < 0)
122 scnprintf(to_dir, sizeof(to_dir), "%s/%s/%s",
123 buildid_dir, DSO__NAME_KCORE, sbuildid);
126 !build_id_cache__kcore_existing(from_dir, to_dir, sizeof(to_dir))) {
127 pr_debug("same kcore found in %s\n", to_dir);
131 if (build_id_cache__kcore_dir(dir, sizeof(dir)))
134 scnprintf(to_dir, sizeof(to_dir), "%s/%s/%s/%s",
135 buildid_dir, DSO__NAME_KCORE, sbuildid, dir);
137 if (mkdir_p(to_dir, 0755))
140 if (kcore_copy(from_dir, to_dir)) {
141 /* Remove YYYYmmddHHMMSShh directory */
142 if (!rmdir(to_dir)) {
143 p = strrchr(to_dir, '/');
146 /* Try to remove buildid directory */
147 if (!rmdir(to_dir)) {
148 p = strrchr(to_dir, '/');
151 /* Try to remove [kernel.kcore] directory */
158 pr_debug("kcore added to build-id cache directory %s\n", to_dir);
163 static int build_id_cache__add_file(const char *filename)
165 char sbuild_id[SBUILD_ID_SIZE];
166 u8 build_id[BUILD_ID_SIZE];
169 if (filename__read_build_id(filename, &build_id, sizeof(build_id)) < 0) {
170 pr_debug("Couldn't read a build-id in %s\n", filename);
174 build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
175 err = build_id_cache__add_s(sbuild_id, filename,
177 pr_debug("Adding %s %s: %s\n", sbuild_id, filename,
178 err ? "FAIL" : "Ok");
182 static int build_id_cache__remove_file(const char *filename)
184 u8 build_id[BUILD_ID_SIZE];
185 char sbuild_id[SBUILD_ID_SIZE];
189 if (filename__read_build_id(filename, &build_id, sizeof(build_id)) < 0) {
190 pr_debug("Couldn't read a build-id in %s\n", filename);
194 build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
195 err = build_id_cache__remove_s(sbuild_id);
196 pr_debug("Removing %s %s: %s\n", sbuild_id, filename,
197 err ? "FAIL" : "Ok");
202 static int build_id_cache__purge_path(const char *pathname)
204 struct strlist *list;
205 struct str_node *pos;
208 err = build_id_cache__list_build_ids(pathname, &list);
212 strlist__for_each_entry(pos, list) {
213 err = build_id_cache__remove_s(pos->s);
214 pr_debug("Removing %s %s: %s\n", pos->s, pathname,
215 err ? "FAIL" : "Ok");
219 strlist__delete(list);
222 pr_debug("Purging %s: %s\n", pathname, err ? "FAIL" : "Ok");
227 static bool dso__missing_buildid_cache(struct dso *dso, int parm __maybe_unused)
229 char filename[PATH_MAX];
230 u8 build_id[BUILD_ID_SIZE];
232 if (dso__build_id_filename(dso, filename, sizeof(filename)) &&
233 filename__read_build_id(filename, build_id,
234 sizeof(build_id)) != sizeof(build_id)) {
238 pr_warning("Problems with %s file, consider removing it from the cache\n",
240 } else if (memcmp(dso->build_id, build_id, sizeof(dso->build_id))) {
241 pr_warning("Problems with %s file, consider removing it from the cache\n",
248 static int build_id_cache__fprintf_missing(struct perf_session *session, FILE *fp)
250 perf_session__fprintf_dsos_buildid(session, fp, dso__missing_buildid_cache, 0);
254 static int build_id_cache__update_file(const char *filename)
256 u8 build_id[BUILD_ID_SIZE];
257 char sbuild_id[SBUILD_ID_SIZE];
261 if (filename__read_build_id(filename, &build_id, sizeof(build_id)) < 0) {
262 pr_debug("Couldn't read a build-id in %s\n", filename);
266 build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
267 if (build_id_cache__cached(sbuild_id))
268 err = build_id_cache__remove_s(sbuild_id);
271 err = build_id_cache__add_s(sbuild_id, filename, false, false);
273 pr_debug("Updating %s %s: %s\n", sbuild_id, filename,
274 err ? "FAIL" : "Ok");
279 int cmd_buildid_cache(int argc, const char **argv)
281 struct strlist *list;
282 struct str_node *pos;
285 char const *add_name_list_str = NULL,
286 *remove_name_list_str = NULL,
287 *purge_name_list_str = NULL,
288 *missing_filename = NULL,
289 *update_name_list_str = NULL,
290 *kcore_filename = NULL;
291 char sbuf[STRERR_BUFSIZE];
293 struct perf_data_file file = {
294 .mode = PERF_DATA_MODE_READ,
296 struct perf_session *session = NULL;
298 const struct option buildid_cache_options[] = {
299 OPT_STRING('a', "add", &add_name_list_str,
300 "file list", "file(s) to add"),
301 OPT_STRING('k', "kcore", &kcore_filename,
302 "file", "kcore file to add"),
303 OPT_STRING('r', "remove", &remove_name_list_str, "file list",
304 "file(s) to remove"),
305 OPT_STRING('p', "purge", &purge_name_list_str, "path list",
306 "path(s) to remove (remove old caches too)"),
307 OPT_STRING('M', "missing", &missing_filename, "file",
308 "to find missing build ids in the cache"),
309 OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
310 OPT_STRING('u', "update", &update_name_list_str, "file list",
311 "file(s) to update"),
312 OPT_INCR('v', "verbose", &verbose, "be more verbose"),
315 const char * const buildid_cache_usage[] = {
316 "perf buildid-cache [<options>]",
320 argc = parse_options(argc, argv, buildid_cache_options,
321 buildid_cache_usage, 0);
323 if (argc || (!add_name_list_str && !kcore_filename &&
324 !remove_name_list_str && !purge_name_list_str &&
325 !missing_filename && !update_name_list_str))
326 usage_with_options(buildid_cache_usage, buildid_cache_options);
328 if (missing_filename) {
329 file.path = missing_filename;
332 session = perf_session__new(&file, false, NULL);
337 if (symbol__init(session ? &session->header.env : NULL) < 0)
342 if (add_name_list_str) {
343 list = strlist__new(add_name_list_str, NULL);
345 strlist__for_each_entry(pos, list)
346 if (build_id_cache__add_file(pos->s)) {
347 if (errno == EEXIST) {
348 pr_debug("%s already in the cache\n",
352 pr_warning("Couldn't add %s: %s\n",
353 pos->s, str_error_r(errno, sbuf, sizeof(sbuf)));
356 strlist__delete(list);
360 if (remove_name_list_str) {
361 list = strlist__new(remove_name_list_str, NULL);
363 strlist__for_each_entry(pos, list)
364 if (build_id_cache__remove_file(pos->s)) {
365 if (errno == ENOENT) {
366 pr_debug("%s wasn't in the cache\n",
370 pr_warning("Couldn't remove %s: %s\n",
371 pos->s, str_error_r(errno, sbuf, sizeof(sbuf)));
374 strlist__delete(list);
378 if (purge_name_list_str) {
379 list = strlist__new(purge_name_list_str, NULL);
381 strlist__for_each_entry(pos, list)
382 if (build_id_cache__purge_path(pos->s)) {
383 if (errno == ENOENT) {
384 pr_debug("%s wasn't in the cache\n",
388 pr_warning("Couldn't remove %s: %s\n",
389 pos->s, str_error_r(errno, sbuf, sizeof(sbuf)));
392 strlist__delete(list);
396 if (missing_filename)
397 ret = build_id_cache__fprintf_missing(session, stdout);
399 if (update_name_list_str) {
400 list = strlist__new(update_name_list_str, NULL);
402 strlist__for_each_entry(pos, list)
403 if (build_id_cache__update_file(pos->s)) {
404 if (errno == ENOENT) {
405 pr_debug("%s wasn't in the cache\n",
409 pr_warning("Couldn't update %s: %s\n",
410 pos->s, str_error_r(errno, sbuf, sizeof(sbuf)));
413 strlist__delete(list);
417 if (kcore_filename && build_id_cache__add_kcore(kcore_filename, force))
418 pr_warning("Couldn't add %s\n", kcore_filename);
421 perf_session__delete(session);