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 "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"
25 static int build_id_cache__kcore_buildid(const char *proc_dir
, char *sbuildid
)
27 char root_dir
[PATH_MAX
];
29 u8 build_id
[BUILD_ID_SIZE
];
32 strlcpy(root_dir
, proc_dir
, sizeof(root_dir
));
34 p
= strrchr(root_dir
, '/');
39 scnprintf(notes
, sizeof(notes
), "%s/sys/kernel/notes", root_dir
);
41 if (sysfs__read_build_id(notes
, build_id
, sizeof(build_id
)))
44 build_id__sprintf(build_id
, sizeof(build_id
), sbuildid
);
49 static int build_id_cache__kcore_dir(char *dir
, size_t sz
)
55 if (gettimeofday(&tv
, NULL
) || !localtime_r(&tv
.tv_sec
, &tm
))
58 if (!strftime(dt
, sizeof(dt
), "%Y%m%d%H%M%S", &tm
))
61 scnprintf(dir
, sz
, "%s%02u", dt
, (unsigned)tv
.tv_usec
/ 10000);
66 static bool same_kallsyms_reloc(const char *from_dir
, char *to_dir
)
71 u64 addr1
= 0, addr2
= 0;
74 scnprintf(from
, sizeof(from
), "%s/kallsyms", from_dir
);
75 scnprintf(to
, sizeof(to
), "%s/kallsyms", to_dir
);
77 for (i
= 0; (name
= ref_reloc_sym_names
[i
]) != NULL
; i
++) {
78 addr1
= kallsyms__get_function_start(from
, name
);
84 addr2
= kallsyms__get_function_start(to
, name
);
86 return addr1
== addr2
;
89 static int build_id_cache__kcore_existing(const char *from_dir
, char *to_dir
,
94 char to_subdir
[PATH_MAX
];
103 scnprintf(from
, sizeof(from
), "%s/modules", from_dir
);
109 if (dent
->d_type
!= DT_DIR
)
111 scnprintf(to
, sizeof(to
), "%s/%s/modules", to_dir
,
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
);
128 static int build_id_cache__add_kcore(const char *filename
, const char *debugdir
,
131 char dir
[32], sbuildid
[BUILD_ID_SIZE
* 2 + 1];
132 char from_dir
[PATH_MAX
], to_dir
[PATH_MAX
];
135 strlcpy(from_dir
, filename
, sizeof(from_dir
));
137 p
= strrchr(from_dir
, '/');
138 if (!p
|| strcmp(p
+ 1, "kcore"))
142 if (build_id_cache__kcore_buildid(from_dir
, sbuildid
))
145 scnprintf(to_dir
, sizeof(to_dir
), "%s/[kernel.kcore]/%s",
149 !build_id_cache__kcore_existing(from_dir
, to_dir
, sizeof(to_dir
))) {
150 pr_debug("same kcore found in %s\n", to_dir
);
154 if (build_id_cache__kcore_dir(dir
, sizeof(dir
)))
157 scnprintf(to_dir
, sizeof(to_dir
), "%s/[kernel.kcore]/%s/%s",
158 debugdir
, sbuildid
, dir
);
160 if (mkdir_p(to_dir
, 0755))
163 if (kcore_copy(from_dir
, to_dir
)) {
164 /* Remove YYYYmmddHHMMSShh directory */
165 if (!rmdir(to_dir
)) {
166 p
= strrchr(to_dir
, '/');
169 /* Try to remove buildid directory */
170 if (!rmdir(to_dir
)) {
171 p
= strrchr(to_dir
, '/');
174 /* Try to remove [kernel.kcore] directory */
181 pr_debug("kcore added to build-id cache directory %s\n", to_dir
);
186 static int build_id_cache__add_file(const char *filename
, const char *debugdir
)
188 char sbuild_id
[BUILD_ID_SIZE
* 2 + 1];
189 u8 build_id
[BUILD_ID_SIZE
];
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
);
197 build_id__sprintf(build_id
, sizeof(build_id
), sbuild_id
);
198 err
= build_id_cache__add_s(sbuild_id
, debugdir
, filename
,
201 pr_info("Adding %s %s: %s\n", sbuild_id
, filename
,
202 err
? "FAIL" : "Ok");
206 static int build_id_cache__remove_file(const char *filename
,
207 const char *debugdir
)
209 u8 build_id
[BUILD_ID_SIZE
];
210 char sbuild_id
[BUILD_ID_SIZE
* 2 + 1];
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
);
219 build_id__sprintf(build_id
, sizeof(build_id
), sbuild_id
);
220 err
= build_id_cache__remove_s(sbuild_id
, debugdir
);
222 pr_info("Removing %s %s: %s\n", sbuild_id
, filename
,
223 err
? "FAIL" : "Ok");
228 static bool dso__missing_buildid_cache(struct dso
*dso
, int parm __maybe_unused
)
230 char filename
[PATH_MAX
];
231 u8 build_id
[BUILD_ID_SIZE
];
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
)) {
239 pr_warning("Problems with %s file, consider removing it from the cache\n",
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",
249 static int build_id_cache__fprintf_missing(struct perf_session
*session
, FILE *fp
)
251 perf_session__fprintf_dsos_buildid(session
, fp
, dso__missing_buildid_cache
, 0);
255 static int build_id_cache__update_file(const char *filename
,
256 const char *debugdir
)
258 u8 build_id
[BUILD_ID_SIZE
];
259 char sbuild_id
[BUILD_ID_SIZE
* 2 + 1];
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
);
268 build_id__sprintf(build_id
, sizeof(build_id
), sbuild_id
);
269 err
= build_id_cache__remove_s(sbuild_id
, debugdir
);
271 err
= build_id_cache__add_s(sbuild_id
, debugdir
, filename
,
275 pr_info("Updating %s %s: %s\n", sbuild_id
, filename
,
276 err
? "FAIL" : "Ok");
281 int cmd_buildid_cache(int argc
, const char **argv
,
282 const char *prefix __maybe_unused
)
284 struct strlist
*list
;
285 struct str_node
*pos
;
288 char debugdir
[PATH_MAX
];
289 char const *add_name_list_str
= NULL
,
290 *remove_name_list_str
= NULL
,
291 *missing_filename
= NULL
,
292 *update_name_list_str
= NULL
,
294 char sbuf
[STRERR_BUFSIZE
];
296 struct perf_data_file file
= {
297 .mode
= PERF_DATA_MODE_READ
,
299 struct perf_session
*session
= NULL
;
301 const struct option buildid_cache_options
[] = {
302 OPT_STRING('a', "add", &add_name_list_str
,
303 "file list", "file(s) to add"),
304 OPT_STRING('k', "kcore", &kcore_filename
,
305 "file", "kcore file to add"),
306 OPT_STRING('r', "remove", &remove_name_list_str
, "file list",
307 "file(s) to remove"),
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"),
311 OPT_STRING('u', "update", &update_name_list_str
, "file list",
312 "file(s) to update"),
313 OPT_INCR('v', "verbose", &verbose
, "be more verbose"),
316 const char * const buildid_cache_usage
[] = {
317 "perf buildid-cache [<options>]",
321 argc
= parse_options(argc
, argv
, buildid_cache_options
,
322 buildid_cache_usage
, 0);
324 if (missing_filename
) {
325 file
.path
= missing_filename
;
328 session
= perf_session__new(&file
, false, NULL
);
333 if (symbol__init(session
? &session
->header
.env
: NULL
) < 0)
338 snprintf(debugdir
, sizeof(debugdir
), "%s", buildid_dir
);
340 if (add_name_list_str
) {
341 list
= strlist__new(true, add_name_list_str
);
343 strlist__for_each(pos
, list
)
344 if (build_id_cache__add_file(pos
->s
, debugdir
)) {
345 if (errno
== EEXIST
) {
346 pr_debug("%s already in the cache\n",
350 pr_warning("Couldn't add %s: %s\n",
351 pos
->s
, strerror_r(errno
, sbuf
, sizeof(sbuf
)));
354 strlist__delete(list
);
358 if (remove_name_list_str
) {
359 list
= strlist__new(true, remove_name_list_str
);
361 strlist__for_each(pos
, list
)
362 if (build_id_cache__remove_file(pos
->s
, debugdir
)) {
363 if (errno
== ENOENT
) {
364 pr_debug("%s wasn't in the cache\n",
368 pr_warning("Couldn't remove %s: %s\n",
369 pos
->s
, strerror_r(errno
, sbuf
, sizeof(sbuf
)));
372 strlist__delete(list
);
376 if (missing_filename
)
377 ret
= build_id_cache__fprintf_missing(session
, stdout
);
379 if (update_name_list_str
) {
380 list
= strlist__new(true, update_name_list_str
);
382 strlist__for_each(pos
, list
)
383 if (build_id_cache__update_file(pos
->s
, debugdir
)) {
384 if (errno
== ENOENT
) {
385 pr_debug("%s wasn't in the cache\n",
389 pr_warning("Couldn't update %s: %s\n",
390 pos
->s
, strerror_r(errno
, sbuf
, sizeof(sbuf
)));
393 strlist__delete(list
);
397 if (kcore_filename
&&
398 build_id_cache__add_kcore(kcore_filename
, debugdir
, force
))
399 pr_warning("Couldn't add %s\n", kcore_filename
);
403 perf_session__delete(session
);