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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" | |
19 | #include "util/parse-options.h" | |
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]; | |
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 | ||
d3b70220 AH |
66 | static bool same_kallsyms_reloc(const char *from_dir, char *to_dir) |
67 | { | |
68 | char from[PATH_MAX]; | |
69 | char to[PATH_MAX]; | |
70 | const char *name; | |
71 | u64 addr1 = 0, addr2 = 0; | |
72 | int i; | |
73 | ||
74 | scnprintf(from, sizeof(from), "%s/kallsyms", from_dir); | |
75 | scnprintf(to, sizeof(to), "%s/kallsyms", to_dir); | |
76 | ||
77 | for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) { | |
78 | addr1 = kallsyms__get_function_start(from, name); | |
79 | if (addr1) | |
80 | break; | |
81 | } | |
82 | ||
83 | if (name) | |
84 | addr2 = kallsyms__get_function_start(to, name); | |
85 | ||
86 | return addr1 == addr2; | |
87 | } | |
88 | ||
fc1b691d AH |
89 | static int build_id_cache__kcore_existing(const char *from_dir, char *to_dir, |
90 | size_t to_dir_sz) | |
91 | { | |
92 | char from[PATH_MAX]; | |
93 | char to[PATH_MAX]; | |
d3b70220 | 94 | char to_subdir[PATH_MAX]; |
fc1b691d AH |
95 | struct dirent *dent; |
96 | int ret = -1; | |
97 | DIR *d; | |
98 | ||
99 | d = opendir(to_dir); | |
100 | if (!d) | |
101 | return -1; | |
102 | ||
103 | scnprintf(from, sizeof(from), "%s/modules", from_dir); | |
104 | ||
105 | while (1) { | |
106 | dent = readdir(d); | |
107 | if (!dent) | |
108 | break; | |
109 | if (dent->d_type != DT_DIR) | |
110 | continue; | |
111 | scnprintf(to, sizeof(to), "%s/%s/modules", to_dir, | |
112 | dent->d_name); | |
d3b70220 AH |
113 | scnprintf(to_subdir, sizeof(to_subdir), "%s/%s", |
114 | to_dir, dent->d_name); | |
115 | if (!compare_proc_modules(from, to) && | |
116 | same_kallsyms_reloc(from_dir, to_subdir)) { | |
117 | strlcpy(to_dir, to_subdir, to_dir_sz); | |
fc1b691d AH |
118 | ret = 0; |
119 | break; | |
120 | } | |
121 | } | |
122 | ||
123 | closedir(d); | |
124 | ||
125 | return ret; | |
126 | } | |
127 | ||
128 | static int build_id_cache__add_kcore(const char *filename, const char *debugdir) | |
129 | { | |
130 | char dir[32], sbuildid[BUILD_ID_SIZE * 2 + 1]; | |
131 | char from_dir[PATH_MAX], to_dir[PATH_MAX]; | |
132 | char *p; | |
133 | ||
134 | strlcpy(from_dir, filename, sizeof(from_dir)); | |
135 | ||
136 | p = strrchr(from_dir, '/'); | |
137 | if (!p || strcmp(p + 1, "kcore")) | |
138 | return -1; | |
139 | *p = '\0'; | |
140 | ||
141 | if (build_id_cache__kcore_buildid(from_dir, sbuildid)) | |
142 | return -1; | |
143 | ||
144 | scnprintf(to_dir, sizeof(to_dir), "%s/[kernel.kcore]/%s", | |
145 | debugdir, sbuildid); | |
146 | ||
147 | if (!build_id_cache__kcore_existing(from_dir, to_dir, sizeof(to_dir))) { | |
148 | pr_debug("same kcore found in %s\n", to_dir); | |
149 | return 0; | |
150 | } | |
151 | ||
152 | if (build_id_cache__kcore_dir(dir, sizeof(dir))) | |
153 | return -1; | |
154 | ||
155 | scnprintf(to_dir, sizeof(to_dir), "%s/[kernel.kcore]/%s/%s", | |
156 | debugdir, sbuildid, dir); | |
157 | ||
158 | if (mkdir_p(to_dir, 0755)) | |
159 | return -1; | |
160 | ||
161 | if (kcore_copy(from_dir, to_dir)) { | |
162 | /* Remove YYYYmmddHHMMSShh directory */ | |
163 | if (!rmdir(to_dir)) { | |
164 | p = strrchr(to_dir, '/'); | |
165 | if (p) | |
166 | *p = '\0'; | |
167 | /* Try to remove buildid directory */ | |
168 | if (!rmdir(to_dir)) { | |
169 | p = strrchr(to_dir, '/'); | |
170 | if (p) | |
171 | *p = '\0'; | |
172 | /* Try to remove [kernel.kcore] directory */ | |
173 | rmdir(to_dir); | |
174 | } | |
175 | } | |
176 | return -1; | |
177 | } | |
178 | ||
179 | pr_debug("kcore added to build-id cache directory %s\n", to_dir); | |
180 | ||
181 | return 0; | |
182 | } | |
183 | ||
ef12a141 ACM |
184 | static int build_id_cache__add_file(const char *filename, const char *debugdir) |
185 | { | |
186 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
187 | u8 build_id[BUILD_ID_SIZE]; | |
188 | int err; | |
189 | ||
190 | if (filename__read_build_id(filename, &build_id, sizeof(build_id)) < 0) { | |
191 | pr_debug("Couldn't read a build-id in %s\n", filename); | |
192 | return -1; | |
193 | } | |
194 | ||
195 | build_id__sprintf(build_id, sizeof(build_id), sbuild_id); | |
7dbf4dcf JO |
196 | err = build_id_cache__add_s(sbuild_id, debugdir, filename, |
197 | false, false); | |
ef12a141 ACM |
198 | if (verbose) |
199 | pr_info("Adding %s %s: %s\n", sbuild_id, filename, | |
200 | err ? "FAIL" : "Ok"); | |
201 | return err; | |
202 | } | |
203 | ||
472cc83c ACM |
204 | static int build_id_cache__remove_file(const char *filename, |
205 | const char *debugdir) | |
ef12a141 ACM |
206 | { |
207 | u8 build_id[BUILD_ID_SIZE]; | |
208 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
209 | ||
210 | int err; | |
211 | ||
212 | if (filename__read_build_id(filename, &build_id, sizeof(build_id)) < 0) { | |
213 | pr_debug("Couldn't read a build-id in %s\n", filename); | |
214 | return -1; | |
215 | } | |
216 | ||
217 | build_id__sprintf(build_id, sizeof(build_id), sbuild_id); | |
218 | err = build_id_cache__remove_s(sbuild_id, debugdir); | |
219 | if (verbose) | |
220 | pr_info("Removing %s %s: %s\n", sbuild_id, filename, | |
221 | err ? "FAIL" : "Ok"); | |
222 | ||
223 | return err; | |
224 | } | |
225 | ||
fbb6976c ACM |
226 | static bool dso__missing_buildid_cache(struct dso *dso, int parm __maybe_unused) |
227 | { | |
228 | char filename[PATH_MAX]; | |
229 | u8 build_id[BUILD_ID_SIZE]; | |
230 | ||
231 | if (dso__build_id_filename(dso, filename, sizeof(filename)) && | |
232 | filename__read_build_id(filename, build_id, | |
233 | sizeof(build_id)) != sizeof(build_id)) { | |
234 | if (errno == ENOENT) | |
235 | return false; | |
236 | ||
237 | pr_warning("Problems with %s file, consider removing it from the cache\n", | |
238 | filename); | |
239 | } else if (memcmp(dso->build_id, build_id, sizeof(dso->build_id))) { | |
240 | pr_warning("Problems with %s file, consider removing it from the cache\n", | |
241 | filename); | |
242 | } | |
243 | ||
244 | return true; | |
245 | } | |
246 | ||
247 | static int build_id_cache__fprintf_missing(const char *filename, bool force, FILE *fp) | |
248 | { | |
f5fc1412 JO |
249 | struct perf_data_file file = { |
250 | .path = filename, | |
251 | .mode = PERF_DATA_MODE_READ, | |
252 | .force = force, | |
253 | }; | |
254 | struct perf_session *session = perf_session__new(&file, false, NULL); | |
fbb6976c ACM |
255 | if (session == NULL) |
256 | return -1; | |
257 | ||
258 | perf_session__fprintf_dsos_buildid(session, fp, dso__missing_buildid_cache, 0); | |
259 | perf_session__delete(session); | |
260 | ||
261 | return 0; | |
262 | } | |
263 | ||
eeb49845 NK |
264 | static int build_id_cache__update_file(const char *filename, |
265 | const char *debugdir) | |
266 | { | |
267 | u8 build_id[BUILD_ID_SIZE]; | |
268 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
269 | ||
270 | int err; | |
271 | ||
272 | if (filename__read_build_id(filename, &build_id, sizeof(build_id)) < 0) { | |
273 | pr_debug("Couldn't read a build-id in %s\n", filename); | |
274 | return -1; | |
275 | } | |
276 | ||
277 | build_id__sprintf(build_id, sizeof(build_id), sbuild_id); | |
278 | err = build_id_cache__remove_s(sbuild_id, debugdir); | |
279 | if (!err) { | |
280 | err = build_id_cache__add_s(sbuild_id, debugdir, filename, | |
281 | false, false); | |
282 | } | |
283 | if (verbose) | |
284 | pr_info("Updating %s %s: %s\n", sbuild_id, filename, | |
285 | err ? "FAIL" : "Ok"); | |
286 | ||
287 | return err; | |
288 | } | |
289 | ||
472cc83c ACM |
290 | int cmd_buildid_cache(int argc, const char **argv, |
291 | const char *prefix __maybe_unused) | |
ef12a141 ACM |
292 | { |
293 | struct strlist *list; | |
294 | struct str_node *pos; | |
fbb6976c ACM |
295 | int ret = 0; |
296 | bool force = false; | |
ef12a141 | 297 | char debugdir[PATH_MAX]; |
472cc83c | 298 | char const *add_name_list_str = NULL, |
fbb6976c | 299 | *remove_name_list_str = NULL, |
eeb49845 | 300 | *missing_filename = NULL, |
fc1b691d AH |
301 | *update_name_list_str = NULL, |
302 | *kcore_filename; | |
eeb49845 | 303 | |
472cc83c ACM |
304 | const struct option buildid_cache_options[] = { |
305 | OPT_STRING('a', "add", &add_name_list_str, | |
306 | "file list", "file(s) to add"), | |
fc1b691d AH |
307 | OPT_STRING('k', "kcore", &kcore_filename, |
308 | "file", "kcore file to add"), | |
472cc83c ACM |
309 | OPT_STRING('r', "remove", &remove_name_list_str, "file list", |
310 | "file(s) to remove"), | |
fbb6976c ACM |
311 | OPT_STRING('M', "missing", &missing_filename, "file", |
312 | "to find missing build ids in the cache"), | |
313 | OPT_BOOLEAN('f', "force", &force, "don't complain, do it"), | |
eeb49845 NK |
314 | OPT_STRING('u', "update", &update_name_list_str, "file list", |
315 | "file(s) to update"), | |
472cc83c ACM |
316 | OPT_INCR('v', "verbose", &verbose, "be more verbose"), |
317 | OPT_END() | |
318 | }; | |
319 | const char * const buildid_cache_usage[] = { | |
320 | "perf buildid-cache [<options>]", | |
321 | NULL | |
322 | }; | |
323 | ||
324 | argc = parse_options(argc, argv, buildid_cache_options, | |
325 | buildid_cache_usage, 0); | |
326 | ||
327 | if (symbol__init() < 0) | |
328 | return -1; | |
329 | ||
330 | setup_pager(); | |
ef12a141 | 331 | |
45de34bb | 332 | snprintf(debugdir, sizeof(debugdir), "%s", buildid_dir); |
ef12a141 ACM |
333 | |
334 | if (add_name_list_str) { | |
335 | list = strlist__new(true, add_name_list_str); | |
336 | if (list) { | |
337 | strlist__for_each(pos, list) | |
338 | if (build_id_cache__add_file(pos->s, debugdir)) { | |
339 | if (errno == EEXIST) { | |
340 | pr_debug("%s already in the cache\n", | |
341 | pos->s); | |
342 | continue; | |
343 | } | |
344 | pr_warning("Couldn't add %s: %s\n", | |
345 | pos->s, strerror(errno)); | |
346 | } | |
347 | ||
348 | strlist__delete(list); | |
349 | } | |
350 | } | |
351 | ||
352 | if (remove_name_list_str) { | |
353 | list = strlist__new(true, remove_name_list_str); | |
354 | if (list) { | |
355 | strlist__for_each(pos, list) | |
356 | if (build_id_cache__remove_file(pos->s, debugdir)) { | |
357 | if (errno == ENOENT) { | |
358 | pr_debug("%s wasn't in the cache\n", | |
359 | pos->s); | |
360 | continue; | |
361 | } | |
362 | pr_warning("Couldn't remove %s: %s\n", | |
363 | pos->s, strerror(errno)); | |
364 | } | |
365 | ||
366 | strlist__delete(list); | |
367 | } | |
368 | } | |
369 | ||
fbb6976c ACM |
370 | if (missing_filename) |
371 | ret = build_id_cache__fprintf_missing(missing_filename, force, stdout); | |
372 | ||
eeb49845 NK |
373 | if (update_name_list_str) { |
374 | list = strlist__new(true, update_name_list_str); | |
375 | if (list) { | |
376 | strlist__for_each(pos, list) | |
377 | if (build_id_cache__update_file(pos->s, debugdir)) { | |
378 | if (errno == ENOENT) { | |
379 | pr_debug("%s wasn't in the cache\n", | |
380 | pos->s); | |
381 | continue; | |
382 | } | |
383 | pr_warning("Couldn't update %s: %s\n", | |
384 | pos->s, strerror(errno)); | |
385 | } | |
386 | ||
387 | strlist__delete(list); | |
388 | } | |
389 | } | |
390 | ||
fc1b691d AH |
391 | if (kcore_filename && |
392 | build_id_cache__add_kcore(kcore_filename, debugdir)) | |
393 | pr_warning("Couldn't add %s\n", kcore_filename); | |
394 | ||
fbb6976c | 395 | return ret; |
ef12a141 | 396 | } |