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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 "builtin.h"
10#include "perf.h"
11#include "util/cache.h"
12#include "util/debug.h"
13#include "util/header.h"
14#include "util/parse-options.h"
15#include "util/strlist.h"
16#include "util/symbol.h"
17
18static char const *add_name_list_str, *remove_name_list_str;
19
20static const char * const buildid_cache_usage[] = {
21 "perf buildid-cache [<options>]",
22 NULL
23};
24
25static const struct option buildid_cache_options[] = {
26 OPT_STRING('a', "add", &add_name_list_str,
27 "file list", "file(s) to add"),
28 OPT_STRING('r', "remove", &remove_name_list_str, "file list",
29 "file(s) to remove"),
30 OPT_INCR('v', "verbose", &verbose, "be more verbose"),
31 OPT_END()
32};
33
34static int build_id_cache__add_file(const char *filename, const char *debugdir)
35{
36 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
37 u8 build_id[BUILD_ID_SIZE];
38 int err;
39
40 if (filename__read_build_id(filename, &build_id, sizeof(build_id)) < 0) {
41 pr_debug("Couldn't read a build-id in %s\n", filename);
42 return -1;
43 }
44
45 build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
46 err = build_id_cache__add_s(sbuild_id, debugdir, filename, false);
47 if (verbose)
48 pr_info("Adding %s %s: %s\n", sbuild_id, filename,
49 err ? "FAIL" : "Ok");
50 return err;
51}
52
53static int build_id_cache__remove_file(const char *filename __used,
54 const char *debugdir __used)
55{
56 u8 build_id[BUILD_ID_SIZE];
57 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
58
59 int err;
60
61 if (filename__read_build_id(filename, &build_id, sizeof(build_id)) < 0) {
62 pr_debug("Couldn't read a build-id in %s\n", filename);
63 return -1;
64 }
65
66 build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
67 err = build_id_cache__remove_s(sbuild_id, debugdir);
68 if (verbose)
69 pr_info("Removing %s %s: %s\n", sbuild_id, filename,
70 err ? "FAIL" : "Ok");
71
72 return err;
73}
74
75static int __cmd_buildid_cache(void)
76{
77 struct strlist *list;
78 struct str_node *pos;
79 char debugdir[PATH_MAX];
80
81 snprintf(debugdir, sizeof(debugdir), "%s", buildid_dir);
82
83 if (add_name_list_str) {
84 list = strlist__new(true, add_name_list_str);
85 if (list) {
86 strlist__for_each(pos, list)
87 if (build_id_cache__add_file(pos->s, debugdir)) {
88 if (errno == EEXIST) {
89 pr_debug("%s already in the cache\n",
90 pos->s);
91 continue;
92 }
93 pr_warning("Couldn't add %s: %s\n",
94 pos->s, strerror(errno));
95 }
96
97 strlist__delete(list);
98 }
99 }
100
101 if (remove_name_list_str) {
102 list = strlist__new(true, remove_name_list_str);
103 if (list) {
104 strlist__for_each(pos, list)
105 if (build_id_cache__remove_file(pos->s, debugdir)) {
106 if (errno == ENOENT) {
107 pr_debug("%s wasn't in the cache\n",
108 pos->s);
109 continue;
110 }
111 pr_warning("Couldn't remove %s: %s\n",
112 pos->s, strerror(errno));
113 }
114
115 strlist__delete(list);
116 }
117 }
118
119 return 0;
120}
121
122int cmd_buildid_cache(int argc, const char **argv, const char *prefix __used)
123{
124 argc = parse_options(argc, argv, buildid_cache_options,
125 buildid_cache_usage, 0);
126
127 if (symbol__init() < 0)
128 return -1;
129
130 setup_pager();
131 return __cmd_buildid_cache();
132}
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
25static 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
66static 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
89static 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];
94 char to_subdir[PATH_MAX];
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);
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);
118 ret = 0;
119 break;
120 }
121 }
122
123 closedir(d);
124
125 return ret;
126}
127
128static 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
184static 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);
196 err = build_id_cache__add_s(sbuild_id, debugdir, filename,
197 false, false);
198 if (verbose)
199 pr_info("Adding %s %s: %s\n", sbuild_id, filename,
200 err ? "FAIL" : "Ok");
201 return err;
202}
203
204static int build_id_cache__remove_file(const char *filename,
205 const char *debugdir)
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
226static 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
247static int build_id_cache__fprintf_missing(const char *filename, bool force, FILE *fp)
248{
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);
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
264static 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
290int cmd_buildid_cache(int argc, const char **argv,
291 const char *prefix __maybe_unused)
292{
293 struct strlist *list;
294 struct str_node *pos;
295 int ret = 0;
296 bool force = false;
297 char debugdir[PATH_MAX];
298 char const *add_name_list_str = NULL,
299 *remove_name_list_str = NULL,
300 *missing_filename = NULL,
301 *update_name_list_str = NULL,
302 *kcore_filename;
303
304 const struct option buildid_cache_options[] = {
305 OPT_STRING('a', "add", &add_name_list_str,
306 "file list", "file(s) to add"),
307 OPT_STRING('k', "kcore", &kcore_filename,
308 "file", "kcore file to add"),
309 OPT_STRING('r', "remove", &remove_name_list_str, "file list",
310 "file(s) to remove"),
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"),
314 OPT_STRING('u', "update", &update_name_list_str, "file list",
315 "file(s) to update"),
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();
331
332 snprintf(debugdir, sizeof(debugdir), "%s", buildid_dir);
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
370 if (missing_filename)
371 ret = build_id_cache__fprintf_missing(missing_filename, force, stdout);
372
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
391 if (kcore_filename &&
392 build_id_cache__add_kcore(kcore_filename, debugdir))
393 pr_warning("Couldn't add %s\n", kcore_filename);
394
395 return ret;
396}