blob: 77d5cae54c6ac3dbed34267fd542303b4253079c [file] [log] [blame]
Arnaldo Carvalho de Meloef12a142010-01-20 15:28:45 -02001/*
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 */
Adrian Hunterfc1b6912013-10-14 16:57:29 +03009#include <sys/types.h>
10#include <sys/time.h>
11#include <time.h>
12#include <dirent.h>
13#include <unistd.h>
Arnaldo Carvalho de Meloef12a142010-01-20 15:28:45 -020014#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"
Jiri Olsaebb296c2012-10-27 23:18:28 +020021#include "util/build-id.h"
Arnaldo Carvalho de Melofbb69762012-12-07 16:28:27 -030022#include "util/session.h"
Jiri Olsa4383db82012-10-27 23:18:29 +020023#include "util/symbol.h"
Arnaldo Carvalho de Meloef12a142010-01-20 15:28:45 -020024
Adrian Hunterfc1b6912013-10-14 16:57:29 +030025static 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
49static 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
Adrian Hunterd3b70222014-01-29 16:14:44 +020066static 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
Adrian Hunterfc1b6912013-10-14 16:57:29 +030089static 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];
Adrian Hunterd3b70222014-01-29 16:14:44 +020094 char to_subdir[PATH_MAX];
Adrian Hunterfc1b6912013-10-14 16:57:29 +030095 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);
Adrian Hunterd3b70222014-01-29 16:14:44 +0200113 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);
Adrian Hunterfc1b6912013-10-14 16:57:29 +0300118 ret = 0;
119 break;
120 }
121 }
122
123 closedir(d);
124
125 return ret;
126}
127
Adrian Hunter5173fbb2014-07-14 13:02:38 +0300128static int build_id_cache__add_kcore(const char *filename, const char *debugdir,
129 bool force)
Adrian Hunterfc1b6912013-10-14 16:57:29 +0300130{
131 char dir[32], sbuildid[BUILD_ID_SIZE * 2 + 1];
132 char from_dir[PATH_MAX], to_dir[PATH_MAX];
133 char *p;
134
135 strlcpy(from_dir, filename, sizeof(from_dir));
136
137 p = strrchr(from_dir, '/');
138 if (!p || strcmp(p + 1, "kcore"))
139 return -1;
140 *p = '\0';
141
142 if (build_id_cache__kcore_buildid(from_dir, sbuildid))
143 return -1;
144
145 scnprintf(to_dir, sizeof(to_dir), "%s/[kernel.kcore]/%s",
146 debugdir, sbuildid);
147
Adrian Hunter5173fbb2014-07-14 13:02:38 +0300148 if (!force &&
149 !build_id_cache__kcore_existing(from_dir, to_dir, sizeof(to_dir))) {
Adrian Hunterfc1b6912013-10-14 16:57:29 +0300150 pr_debug("same kcore found in %s\n", to_dir);
151 return 0;
152 }
153
154 if (build_id_cache__kcore_dir(dir, sizeof(dir)))
155 return -1;
156
157 scnprintf(to_dir, sizeof(to_dir), "%s/[kernel.kcore]/%s/%s",
158 debugdir, sbuildid, dir);
159
160 if (mkdir_p(to_dir, 0755))
161 return -1;
162
163 if (kcore_copy(from_dir, to_dir)) {
164 /* Remove YYYYmmddHHMMSShh directory */
165 if (!rmdir(to_dir)) {
166 p = strrchr(to_dir, '/');
167 if (p)
168 *p = '\0';
169 /* Try to remove buildid directory */
170 if (!rmdir(to_dir)) {
171 p = strrchr(to_dir, '/');
172 if (p)
173 *p = '\0';
174 /* Try to remove [kernel.kcore] directory */
175 rmdir(to_dir);
176 }
177 }
178 return -1;
179 }
180
181 pr_debug("kcore added to build-id cache directory %s\n", to_dir);
182
183 return 0;
184}
185
Arnaldo Carvalho de Meloef12a142010-01-20 15:28:45 -0200186static int build_id_cache__add_file(const char *filename, const char *debugdir)
187{
188 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
189 u8 build_id[BUILD_ID_SIZE];
190 int err;
191
192 if (filename__read_build_id(filename, &build_id, sizeof(build_id)) < 0) {
193 pr_debug("Couldn't read a build-id in %s\n", filename);
194 return -1;
195 }
196
197 build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
Jiri Olsa7dbf4dc2012-09-10 18:50:19 +0200198 err = build_id_cache__add_s(sbuild_id, debugdir, filename,
199 false, false);
Arnaldo Carvalho de Meloef12a142010-01-20 15:28:45 -0200200 if (verbose)
201 pr_info("Adding %s %s: %s\n", sbuild_id, filename,
202 err ? "FAIL" : "Ok");
203 return err;
204}
205
Arnaldo Carvalho de Melo472cc832012-10-01 15:20:58 -0300206static int build_id_cache__remove_file(const char *filename,
207 const char *debugdir)
Arnaldo Carvalho de Meloef12a142010-01-20 15:28:45 -0200208{
209 u8 build_id[BUILD_ID_SIZE];
210 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
211
212 int err;
213
214 if (filename__read_build_id(filename, &build_id, sizeof(build_id)) < 0) {
215 pr_debug("Couldn't read a build-id in %s\n", filename);
216 return -1;
217 }
218
219 build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
220 err = build_id_cache__remove_s(sbuild_id, debugdir);
221 if (verbose)
222 pr_info("Removing %s %s: %s\n", sbuild_id, filename,
223 err ? "FAIL" : "Ok");
224
225 return err;
226}
227
Arnaldo Carvalho de Melofbb69762012-12-07 16:28:27 -0300228static bool dso__missing_buildid_cache(struct dso *dso, int parm __maybe_unused)
229{
230 char filename[PATH_MAX];
231 u8 build_id[BUILD_ID_SIZE];
232
233 if (dso__build_id_filename(dso, filename, sizeof(filename)) &&
234 filename__read_build_id(filename, build_id,
235 sizeof(build_id)) != sizeof(build_id)) {
236 if (errno == ENOENT)
237 return false;
238
239 pr_warning("Problems with %s file, consider removing it from the cache\n",
240 filename);
241 } else if (memcmp(dso->build_id, build_id, sizeof(dso->build_id))) {
242 pr_warning("Problems with %s file, consider removing it from the cache\n",
243 filename);
244 }
245
246 return true;
247}
248
Namhyung Kime3ed75b2014-08-12 15:40:36 +0900249static int build_id_cache__fprintf_missing(struct perf_session *session, FILE *fp)
Arnaldo Carvalho de Melofbb69762012-12-07 16:28:27 -0300250{
Arnaldo Carvalho de Melofbb69762012-12-07 16:28:27 -0300251 perf_session__fprintf_dsos_buildid(session, fp, dso__missing_buildid_cache, 0);
Arnaldo Carvalho de Melofbb69762012-12-07 16:28:27 -0300252 return 0;
253}
254
Namhyung Kimeeb49842013-02-07 18:02:11 +0900255static int build_id_cache__update_file(const char *filename,
256 const char *debugdir)
257{
258 u8 build_id[BUILD_ID_SIZE];
259 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
260
261 int err;
262
263 if (filename__read_build_id(filename, &build_id, sizeof(build_id)) < 0) {
264 pr_debug("Couldn't read a build-id in %s\n", filename);
265 return -1;
266 }
267
268 build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
269 err = build_id_cache__remove_s(sbuild_id, debugdir);
270 if (!err) {
271 err = build_id_cache__add_s(sbuild_id, debugdir, filename,
272 false, false);
273 }
274 if (verbose)
275 pr_info("Updating %s %s: %s\n", sbuild_id, filename,
276 err ? "FAIL" : "Ok");
277
278 return err;
279}
280
Arnaldo Carvalho de Melo472cc832012-10-01 15:20:58 -0300281int cmd_buildid_cache(int argc, const char **argv,
282 const char *prefix __maybe_unused)
Arnaldo Carvalho de Meloef12a142010-01-20 15:28:45 -0200283{
284 struct strlist *list;
285 struct str_node *pos;
Arnaldo Carvalho de Melofbb69762012-12-07 16:28:27 -0300286 int ret = 0;
287 bool force = false;
Arnaldo Carvalho de Melo472cc832012-10-01 15:20:58 -0300288 char const *add_name_list_str = NULL,
Arnaldo Carvalho de Melofbb69762012-12-07 16:28:27 -0300289 *remove_name_list_str = NULL,
Namhyung Kimeeb49842013-02-07 18:02:11 +0900290 *missing_filename = NULL,
Adrian Hunterfc1b6912013-10-14 16:57:29 +0300291 *update_name_list_str = NULL,
Jiri Olsaeec5a682014-12-01 20:06:27 +0100292 *kcore_filename = NULL;
Masami Hiramatsu340481ad2014-08-14 02:22:49 +0000293 char sbuf[STRERR_BUFSIZE];
Namhyung Kimeeb49842013-02-07 18:02:11 +0900294
Namhyung Kime3ed75b2014-08-12 15:40:36 +0900295 struct perf_data_file file = {
296 .mode = PERF_DATA_MODE_READ,
297 };
298 struct perf_session *session = NULL;
299
Arnaldo Carvalho de Melo472cc832012-10-01 15:20:58 -0300300 const struct option buildid_cache_options[] = {
301 OPT_STRING('a', "add", &add_name_list_str,
302 "file list", "file(s) to add"),
Adrian Hunterfc1b6912013-10-14 16:57:29 +0300303 OPT_STRING('k', "kcore", &kcore_filename,
304 "file", "kcore file to add"),
Arnaldo Carvalho de Melo472cc832012-10-01 15:20:58 -0300305 OPT_STRING('r', "remove", &remove_name_list_str, "file list",
306 "file(s) to remove"),
Arnaldo Carvalho de Melofbb69762012-12-07 16:28:27 -0300307 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"),
Namhyung Kimeeb49842013-02-07 18:02:11 +0900310 OPT_STRING('u', "update", &update_name_list_str, "file list",
311 "file(s) to update"),
Arnaldo Carvalho de Melo472cc832012-10-01 15:20:58 -0300312 OPT_INCR('v', "verbose", &verbose, "be more verbose"),
313 OPT_END()
314 };
315 const char * const buildid_cache_usage[] = {
316 "perf buildid-cache [<options>]",
317 NULL
318 };
319
320 argc = parse_options(argc, argv, buildid_cache_options,
321 buildid_cache_usage, 0);
322
Namhyung Kime3ed75b2014-08-12 15:40:36 +0900323 if (missing_filename) {
324 file.path = missing_filename;
325 file.force = force;
326
327 session = perf_session__new(&file, false, NULL);
328 if (session == NULL)
329 return -1;
330 }
331
Namhyung Kim0a7e6d12014-08-12 15:40:45 +0900332 if (symbol__init(session ? &session->header.env : NULL) < 0)
Namhyung Kime3ed75b2014-08-12 15:40:36 +0900333 goto out;
Arnaldo Carvalho de Melo472cc832012-10-01 15:20:58 -0300334
335 setup_pager();
Arnaldo Carvalho de Meloef12a142010-01-20 15:28:45 -0200336
Arnaldo Carvalho de Meloef12a142010-01-20 15:28:45 -0200337 if (add_name_list_str) {
338 list = strlist__new(true, add_name_list_str);
339 if (list) {
340 strlist__for_each(pos, list)
Jiri Olsa498922a2014-12-01 20:06:23 +0100341 if (build_id_cache__add_file(pos->s, buildid_dir)) {
Arnaldo Carvalho de Meloef12a142010-01-20 15:28:45 -0200342 if (errno == EEXIST) {
343 pr_debug("%s already in the cache\n",
344 pos->s);
345 continue;
346 }
347 pr_warning("Couldn't add %s: %s\n",
Masami Hiramatsu340481ad2014-08-14 02:22:49 +0000348 pos->s, strerror_r(errno, sbuf, sizeof(sbuf)));
Arnaldo Carvalho de Meloef12a142010-01-20 15:28:45 -0200349 }
350
351 strlist__delete(list);
352 }
353 }
354
355 if (remove_name_list_str) {
356 list = strlist__new(true, remove_name_list_str);
357 if (list) {
358 strlist__for_each(pos, list)
Jiri Olsa498922a2014-12-01 20:06:23 +0100359 if (build_id_cache__remove_file(pos->s, buildid_dir)) {
Arnaldo Carvalho de Meloef12a142010-01-20 15:28:45 -0200360 if (errno == ENOENT) {
361 pr_debug("%s wasn't in the cache\n",
362 pos->s);
363 continue;
364 }
365 pr_warning("Couldn't remove %s: %s\n",
Masami Hiramatsu340481ad2014-08-14 02:22:49 +0000366 pos->s, strerror_r(errno, sbuf, sizeof(sbuf)));
Arnaldo Carvalho de Meloef12a142010-01-20 15:28:45 -0200367 }
368
369 strlist__delete(list);
370 }
371 }
372
Arnaldo Carvalho de Melofbb69762012-12-07 16:28:27 -0300373 if (missing_filename)
Namhyung Kime3ed75b2014-08-12 15:40:36 +0900374 ret = build_id_cache__fprintf_missing(session, stdout);
Arnaldo Carvalho de Melofbb69762012-12-07 16:28:27 -0300375
Namhyung Kimeeb49842013-02-07 18:02:11 +0900376 if (update_name_list_str) {
377 list = strlist__new(true, update_name_list_str);
378 if (list) {
379 strlist__for_each(pos, list)
Jiri Olsa498922a2014-12-01 20:06:23 +0100380 if (build_id_cache__update_file(pos->s, buildid_dir)) {
Namhyung Kimeeb49842013-02-07 18:02:11 +0900381 if (errno == ENOENT) {
382 pr_debug("%s wasn't in the cache\n",
383 pos->s);
384 continue;
385 }
386 pr_warning("Couldn't update %s: %s\n",
Masami Hiramatsu340481ad2014-08-14 02:22:49 +0000387 pos->s, strerror_r(errno, sbuf, sizeof(sbuf)));
Namhyung Kimeeb49842013-02-07 18:02:11 +0900388 }
389
390 strlist__delete(list);
391 }
392 }
393
Adrian Hunterfc1b6912013-10-14 16:57:29 +0300394 if (kcore_filename &&
Jiri Olsa498922a2014-12-01 20:06:23 +0100395 build_id_cache__add_kcore(kcore_filename, buildid_dir, force))
Adrian Hunterfc1b6912013-10-14 16:57:29 +0300396 pr_warning("Couldn't add %s\n", kcore_filename);
397
Namhyung Kime3ed75b2014-08-12 15:40:36 +0900398out:
399 if (session)
400 perf_session__delete(session);
401
Arnaldo Carvalho de Melofbb69762012-12-07 16:28:27 -0300402 return ret;
Arnaldo Carvalho de Meloef12a142010-01-20 15:28:45 -0200403}