Commit | Line | Data |
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ef12a141 ACM |
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 | */ | |
fc1b691d AH |
9 | #include <sys/types.h> |
10 | #include <sys/time.h> | |
11 | #include <time.h> | |
12 | #include <dirent.h> | |
13 | #include <unistd.h> | |
ef12a141 ACM |
14 | #include "builtin.h" |
15 | #include "perf.h" | |
16 | #include "util/cache.h" | |
17 | #include "util/debug.h" | |
18 | #include "util/header.h" | |
4b6ab94e | 19 | #include <subcmd/parse-options.h> |
ef12a141 | 20 | #include "util/strlist.h" |
ebb296c2 | 21 | #include "util/build-id.h" |
fbb6976c | 22 | #include "util/session.h" |
4383db88 | 23 | #include "util/symbol.h" |
ef12a141 | 24 | |
fc1b691d AH |
25 | static int build_id_cache__kcore_buildid(const char *proc_dir, char *sbuildid) |
26 | { | |
27 | char root_dir[PATH_MAX]; | |
fc1b691d AH |
28 | char *p; |
29 | ||
30 | strlcpy(root_dir, proc_dir, sizeof(root_dir)); | |
31 | ||
32 | p = strrchr(root_dir, '/'); | |
33 | if (!p) | |
34 | return -1; | |
35 | *p = '\0'; | |
0b5a7935 | 36 | return sysfs__sprintf_build_id(root_dir, sbuildid); |
fc1b691d AH |
37 | } |
38 | ||
39 | static int build_id_cache__kcore_dir(char *dir, size_t sz) | |
40 | { | |
37b20151 | 41 | return fetch_current_timestamp(dir, sz); |
fc1b691d AH |
42 | } |
43 | ||
d3b70220 AH |
44 | static bool same_kallsyms_reloc(const char *from_dir, char *to_dir) |
45 | { | |
46 | char from[PATH_MAX]; | |
47 | char to[PATH_MAX]; | |
48 | const char *name; | |
49 | u64 addr1 = 0, addr2 = 0; | |
50 | int i; | |
51 | ||
52 | scnprintf(from, sizeof(from), "%s/kallsyms", from_dir); | |
53 | scnprintf(to, sizeof(to), "%s/kallsyms", to_dir); | |
54 | ||
55 | for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) { | |
56 | addr1 = kallsyms__get_function_start(from, name); | |
57 | if (addr1) | |
58 | break; | |
59 | } | |
60 | ||
61 | if (name) | |
62 | addr2 = kallsyms__get_function_start(to, name); | |
63 | ||
64 | return addr1 == addr2; | |
65 | } | |
66 | ||
fc1b691d AH |
67 | static int build_id_cache__kcore_existing(const char *from_dir, char *to_dir, |
68 | size_t to_dir_sz) | |
69 | { | |
70 | char from[PATH_MAX]; | |
71 | char to[PATH_MAX]; | |
d3b70220 | 72 | char to_subdir[PATH_MAX]; |
fc1b691d AH |
73 | struct dirent *dent; |
74 | int ret = -1; | |
75 | DIR *d; | |
76 | ||
77 | d = opendir(to_dir); | |
78 | if (!d) | |
79 | return -1; | |
80 | ||
81 | scnprintf(from, sizeof(from), "%s/modules", from_dir); | |
82 | ||
83 | while (1) { | |
84 | dent = readdir(d); | |
85 | if (!dent) | |
86 | break; | |
87 | if (dent->d_type != DT_DIR) | |
88 | continue; | |
89 | scnprintf(to, sizeof(to), "%s/%s/modules", to_dir, | |
90 | dent->d_name); | |
d3b70220 AH |
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); | |
fc1b691d AH |
96 | ret = 0; |
97 | break; | |
98 | } | |
99 | } | |
100 | ||
101 | closedir(d); | |
102 | ||
103 | return ret; | |
104 | } | |
105 | ||
e35f7362 | 106 | static int build_id_cache__add_kcore(const char *filename, bool force) |
fc1b691d | 107 | { |
d77fac7f | 108 | char dir[32], sbuildid[SBUILD_ID_SIZE]; |
fc1b691d AH |
109 | char from_dir[PATH_MAX], to_dir[PATH_MAX]; |
110 | char *p; | |
111 | ||
112 | strlcpy(from_dir, filename, sizeof(from_dir)); | |
113 | ||
114 | p = strrchr(from_dir, '/'); | |
115 | if (!p || strcmp(p + 1, "kcore")) | |
116 | return -1; | |
117 | *p = '\0'; | |
118 | ||
0b5a7935 | 119 | if (build_id_cache__kcore_buildid(from_dir, sbuildid) < 0) |
fc1b691d AH |
120 | return -1; |
121 | ||
0a77582f MH |
122 | scnprintf(to_dir, sizeof(to_dir), "%s/%s/%s", |
123 | buildid_dir, DSO__NAME_KCORE, sbuildid); | |
fc1b691d | 124 | |
5173fbb8 AH |
125 | if (!force && |
126 | !build_id_cache__kcore_existing(from_dir, to_dir, sizeof(to_dir))) { | |
fc1b691d AH |
127 | pr_debug("same kcore found in %s\n", to_dir); |
128 | return 0; | |
129 | } | |
130 | ||
131 | if (build_id_cache__kcore_dir(dir, sizeof(dir))) | |
132 | return -1; | |
133 | ||
0a77582f MH |
134 | scnprintf(to_dir, sizeof(to_dir), "%s/%s/%s/%s", |
135 | buildid_dir, DSO__NAME_KCORE, sbuildid, dir); | |
fc1b691d AH |
136 | |
137 | if (mkdir_p(to_dir, 0755)) | |
138 | return -1; | |
139 | ||
140 | if (kcore_copy(from_dir, to_dir)) { | |
141 | /* Remove YYYYmmddHHMMSShh directory */ | |
142 | if (!rmdir(to_dir)) { | |
143 | p = strrchr(to_dir, '/'); | |
144 | if (p) | |
145 | *p = '\0'; | |
146 | /* Try to remove buildid directory */ | |
147 | if (!rmdir(to_dir)) { | |
148 | p = strrchr(to_dir, '/'); | |
149 | if (p) | |
150 | *p = '\0'; | |
151 | /* Try to remove [kernel.kcore] directory */ | |
152 | rmdir(to_dir); | |
153 | } | |
154 | } | |
155 | return -1; | |
156 | } | |
157 | ||
158 | pr_debug("kcore added to build-id cache directory %s\n", to_dir); | |
159 | ||
160 | return 0; | |
161 | } | |
162 | ||
e35f7362 | 163 | static int build_id_cache__add_file(const char *filename) |
ef12a141 | 164 | { |
d77fac7f | 165 | char sbuild_id[SBUILD_ID_SIZE]; |
ef12a141 ACM |
166 | u8 build_id[BUILD_ID_SIZE]; |
167 | int err; | |
168 | ||
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); | |
171 | return -1; | |
172 | } | |
173 | ||
174 | build_id__sprintf(build_id, sizeof(build_id), sbuild_id); | |
e35f7362 | 175 | err = build_id_cache__add_s(sbuild_id, filename, |
7dbf4dcf | 176 | false, false); |
cc169c7c MH |
177 | pr_debug("Adding %s %s: %s\n", sbuild_id, filename, |
178 | err ? "FAIL" : "Ok"); | |
ef12a141 ACM |
179 | return err; |
180 | } | |
181 | ||
e35f7362 | 182 | static int build_id_cache__remove_file(const char *filename) |
ef12a141 ACM |
183 | { |
184 | u8 build_id[BUILD_ID_SIZE]; | |
d77fac7f | 185 | char sbuild_id[SBUILD_ID_SIZE]; |
ef12a141 ACM |
186 | |
187 | int err; | |
188 | ||
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); | |
191 | return -1; | |
192 | } | |
193 | ||
194 | build_id__sprintf(build_id, sizeof(build_id), sbuild_id); | |
e35f7362 | 195 | err = build_id_cache__remove_s(sbuild_id); |
cc169c7c MH |
196 | pr_debug("Removing %s %s: %s\n", sbuild_id, filename, |
197 | err ? "FAIL" : "Ok"); | |
ef12a141 ACM |
198 | |
199 | return err; | |
200 | } | |
201 | ||
8d8c8e4c MH |
202 | static int build_id_cache__purge_path(const char *pathname) |
203 | { | |
204 | struct strlist *list; | |
205 | struct str_node *pos; | |
206 | int err; | |
207 | ||
208 | err = build_id_cache__list_build_ids(pathname, &list); | |
209 | if (err) | |
210 | goto out; | |
211 | ||
212 | strlist__for_each(pos, list) { | |
213 | err = build_id_cache__remove_s(pos->s); | |
cc169c7c MH |
214 | pr_debug("Removing %s %s: %s\n", pos->s, pathname, |
215 | err ? "FAIL" : "Ok"); | |
8d8c8e4c MH |
216 | if (err) |
217 | break; | |
218 | } | |
219 | strlist__delete(list); | |
220 | ||
221 | out: | |
cc169c7c | 222 | pr_debug("Purging %s: %s\n", pathname, err ? "FAIL" : "Ok"); |
8d8c8e4c MH |
223 | |
224 | return err; | |
225 | } | |
226 | ||
fbb6976c ACM |
227 | static bool dso__missing_buildid_cache(struct dso *dso, int parm __maybe_unused) |
228 | { | |
229 | char filename[PATH_MAX]; | |
230 | u8 build_id[BUILD_ID_SIZE]; | |
231 | ||
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)) { | |
235 | if (errno == ENOENT) | |
236 | return false; | |
237 | ||
48000a1a | 238 | pr_warning("Problems with %s file, consider removing it from the cache\n", |
fbb6976c ACM |
239 | filename); |
240 | } else if (memcmp(dso->build_id, build_id, sizeof(dso->build_id))) { | |
48000a1a | 241 | pr_warning("Problems with %s file, consider removing it from the cache\n", |
fbb6976c ACM |
242 | filename); |
243 | } | |
244 | ||
245 | return true; | |
246 | } | |
247 | ||
e3ed75bb | 248 | static int build_id_cache__fprintf_missing(struct perf_session *session, FILE *fp) |
fbb6976c | 249 | { |
fbb6976c | 250 | perf_session__fprintf_dsos_buildid(session, fp, dso__missing_buildid_cache, 0); |
fbb6976c ACM |
251 | return 0; |
252 | } | |
253 | ||
e35f7362 | 254 | static int build_id_cache__update_file(const char *filename) |
eeb49845 NK |
255 | { |
256 | u8 build_id[BUILD_ID_SIZE]; | |
d77fac7f | 257 | char sbuild_id[SBUILD_ID_SIZE]; |
eeb49845 | 258 | |
a50d11a1 | 259 | int err = 0; |
eeb49845 NK |
260 | |
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); | |
263 | return -1; | |
264 | } | |
265 | ||
266 | build_id__sprintf(build_id, sizeof(build_id), sbuild_id); | |
a50d11a1 MH |
267 | if (build_id_cache__cached(sbuild_id)) |
268 | err = build_id_cache__remove_s(sbuild_id); | |
269 | ||
e35f7362 MH |
270 | if (!err) |
271 | err = build_id_cache__add_s(sbuild_id, filename, false, false); | |
272 | ||
cc169c7c MH |
273 | pr_debug("Updating %s %s: %s\n", sbuild_id, filename, |
274 | err ? "FAIL" : "Ok"); | |
eeb49845 NK |
275 | |
276 | return err; | |
277 | } | |
278 | ||
472cc83c ACM |
279 | int cmd_buildid_cache(int argc, const char **argv, |
280 | const char *prefix __maybe_unused) | |
ef12a141 ACM |
281 | { |
282 | struct strlist *list; | |
283 | struct str_node *pos; | |
fbb6976c ACM |
284 | int ret = 0; |
285 | bool force = false; | |
472cc83c | 286 | char const *add_name_list_str = NULL, |
fbb6976c | 287 | *remove_name_list_str = NULL, |
8d8c8e4c | 288 | *purge_name_list_str = NULL, |
eeb49845 | 289 | *missing_filename = NULL, |
fc1b691d | 290 | *update_name_list_str = NULL, |
eec5a688 | 291 | *kcore_filename = NULL; |
340481ad | 292 | char sbuf[STRERR_BUFSIZE]; |
eeb49845 | 293 | |
e3ed75bb NK |
294 | struct perf_data_file file = { |
295 | .mode = PERF_DATA_MODE_READ, | |
296 | }; | |
297 | struct perf_session *session = NULL; | |
298 | ||
472cc83c ACM |
299 | const struct option buildid_cache_options[] = { |
300 | OPT_STRING('a', "add", &add_name_list_str, | |
301 | "file list", "file(s) to add"), | |
fc1b691d AH |
302 | OPT_STRING('k', "kcore", &kcore_filename, |
303 | "file", "kcore file to add"), | |
472cc83c ACM |
304 | OPT_STRING('r', "remove", &remove_name_list_str, "file list", |
305 | "file(s) to remove"), | |
8d8c8e4c MH |
306 | OPT_STRING('p', "purge", &purge_name_list_str, "path list", |
307 | "path(s) to remove (remove old caches too)"), | |
fbb6976c ACM |
308 | OPT_STRING('M', "missing", &missing_filename, "file", |
309 | "to find missing build ids in the cache"), | |
310 | OPT_BOOLEAN('f', "force", &force, "don't complain, do it"), | |
eeb49845 NK |
311 | OPT_STRING('u', "update", &update_name_list_str, "file list", |
312 | "file(s) to update"), | |
472cc83c ACM |
313 | OPT_INCR('v', "verbose", &verbose, "be more verbose"), |
314 | OPT_END() | |
315 | }; | |
316 | const char * const buildid_cache_usage[] = { | |
317 | "perf buildid-cache [<options>]", | |
318 | NULL | |
319 | }; | |
320 | ||
321 | argc = parse_options(argc, argv, buildid_cache_options, | |
322 | buildid_cache_usage, 0); | |
323 | ||
0497d0a8 MH |
324 | if (argc || (!add_name_list_str && !kcore_filename && |
325 | !remove_name_list_str && !purge_name_list_str && | |
326 | !missing_filename && !update_name_list_str)) | |
327 | usage_with_options(buildid_cache_usage, buildid_cache_options); | |
328 | ||
e3ed75bb NK |
329 | if (missing_filename) { |
330 | file.path = missing_filename; | |
331 | file.force = force; | |
332 | ||
333 | session = perf_session__new(&file, false, NULL); | |
334 | if (session == NULL) | |
335 | return -1; | |
336 | } | |
337 | ||
0a7e6d1b | 338 | if (symbol__init(session ? &session->header.env : NULL) < 0) |
e3ed75bb | 339 | goto out; |
472cc83c ACM |
340 | |
341 | setup_pager(); | |
ef12a141 | 342 | |
ef12a141 | 343 | if (add_name_list_str) { |
4a77e218 | 344 | list = strlist__new(add_name_list_str, NULL); |
ef12a141 ACM |
345 | if (list) { |
346 | strlist__for_each(pos, list) | |
e35f7362 | 347 | if (build_id_cache__add_file(pos->s)) { |
ef12a141 ACM |
348 | if (errno == EEXIST) { |
349 | pr_debug("%s already in the cache\n", | |
350 | pos->s); | |
351 | continue; | |
352 | } | |
353 | pr_warning("Couldn't add %s: %s\n", | |
340481ad | 354 | pos->s, strerror_r(errno, sbuf, sizeof(sbuf))); |
ef12a141 ACM |
355 | } |
356 | ||
357 | strlist__delete(list); | |
358 | } | |
359 | } | |
360 | ||
361 | if (remove_name_list_str) { | |
4a77e218 | 362 | list = strlist__new(remove_name_list_str, NULL); |
ef12a141 ACM |
363 | if (list) { |
364 | strlist__for_each(pos, list) | |
e35f7362 | 365 | if (build_id_cache__remove_file(pos->s)) { |
ef12a141 ACM |
366 | if (errno == ENOENT) { |
367 | pr_debug("%s wasn't in the cache\n", | |
368 | pos->s); | |
369 | continue; | |
370 | } | |
371 | pr_warning("Couldn't remove %s: %s\n", | |
340481ad | 372 | pos->s, strerror_r(errno, sbuf, sizeof(sbuf))); |
ef12a141 ACM |
373 | } |
374 | ||
375 | strlist__delete(list); | |
376 | } | |
377 | } | |
378 | ||
8d8c8e4c | 379 | if (purge_name_list_str) { |
4a77e218 | 380 | list = strlist__new(purge_name_list_str, NULL); |
8d8c8e4c MH |
381 | if (list) { |
382 | strlist__for_each(pos, list) | |
383 | if (build_id_cache__purge_path(pos->s)) { | |
384 | if (errno == ENOENT) { | |
385 | pr_debug("%s wasn't in the cache\n", | |
386 | pos->s); | |
387 | continue; | |
388 | } | |
389 | pr_warning("Couldn't remove %s: %s\n", | |
390 | pos->s, strerror_r(errno, sbuf, sizeof(sbuf))); | |
391 | } | |
392 | ||
393 | strlist__delete(list); | |
394 | } | |
395 | } | |
396 | ||
fbb6976c | 397 | if (missing_filename) |
e3ed75bb | 398 | ret = build_id_cache__fprintf_missing(session, stdout); |
fbb6976c | 399 | |
eeb49845 | 400 | if (update_name_list_str) { |
4a77e218 | 401 | list = strlist__new(update_name_list_str, NULL); |
eeb49845 NK |
402 | if (list) { |
403 | strlist__for_each(pos, list) | |
e35f7362 | 404 | if (build_id_cache__update_file(pos->s)) { |
eeb49845 NK |
405 | if (errno == ENOENT) { |
406 | pr_debug("%s wasn't in the cache\n", | |
407 | pos->s); | |
408 | continue; | |
409 | } | |
410 | pr_warning("Couldn't update %s: %s\n", | |
340481ad | 411 | pos->s, strerror_r(errno, sbuf, sizeof(sbuf))); |
eeb49845 NK |
412 | } |
413 | ||
414 | strlist__delete(list); | |
415 | } | |
416 | } | |
417 | ||
e35f7362 | 418 | if (kcore_filename && build_id_cache__add_kcore(kcore_filename, force)) |
fc1b691d AH |
419 | pr_warning("Couldn't add %s\n", kcore_filename); |
420 | ||
e3ed75bb NK |
421 | out: |
422 | if (session) | |
423 | perf_session__delete(session); | |
424 | ||
fbb6976c | 425 | return ret; |
ef12a141 | 426 | } |