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>
17 #include "util/cache.h"
18 #include "util/debug.h"
19 #include "util/header.h"
20 #include <subcmd/parse-options.h>
21 #include "util/strlist.h"
22 #include "util/build-id.h"
23 #include "util/session.h"
24 #include "util/symbol.h"
25 #include "util/time-utils.h"
27 static int build_id_cache__kcore_buildid(const char *proc_dir
, char *sbuildid
)
29 char root_dir
[PATH_MAX
];
32 strlcpy(root_dir
, proc_dir
, sizeof(root_dir
));
34 p
= strrchr(root_dir
, '/');
38 return sysfs__sprintf_build_id(root_dir
, sbuildid
);
41 static int build_id_cache__kcore_dir(char *dir
, size_t sz
)
43 return fetch_current_timestamp(dir
, sz
);
46 static bool same_kallsyms_reloc(const char *from_dir
, char *to_dir
)
51 u64 addr1
= 0, addr2
= 0;
54 scnprintf(from
, sizeof(from
), "%s/kallsyms", from_dir
);
55 scnprintf(to
, sizeof(to
), "%s/kallsyms", to_dir
);
57 for (i
= 0; (name
= ref_reloc_sym_names
[i
]) != NULL
; i
++) {
58 err
= kallsyms__get_function_start(from
, name
, &addr1
);
66 if (kallsyms__get_function_start(to
, name
, &addr2
))
69 return addr1
== addr2
;
72 static int build_id_cache__kcore_existing(const char *from_dir
, char *to_dir
,
77 char to_subdir
[PATH_MAX
];
86 scnprintf(from
, sizeof(from
), "%s/modules", from_dir
);
92 if (dent
->d_type
!= DT_DIR
)
94 scnprintf(to
, sizeof(to
), "%s/%s/modules", to_dir
,
96 scnprintf(to_subdir
, sizeof(to_subdir
), "%s/%s",
97 to_dir
, dent
->d_name
);
98 if (!compare_proc_modules(from
, to
) &&
99 same_kallsyms_reloc(from_dir
, to_subdir
)) {
100 strlcpy(to_dir
, to_subdir
, to_dir_sz
);
111 static int build_id_cache__add_kcore(const char *filename
, bool force
)
113 char dir
[32], sbuildid
[SBUILD_ID_SIZE
];
114 char from_dir
[PATH_MAX
], to_dir
[PATH_MAX
];
117 strlcpy(from_dir
, filename
, sizeof(from_dir
));
119 p
= strrchr(from_dir
, '/');
120 if (!p
|| strcmp(p
+ 1, "kcore"))
124 if (build_id_cache__kcore_buildid(from_dir
, sbuildid
) < 0)
127 scnprintf(to_dir
, sizeof(to_dir
), "%s/%s/%s",
128 buildid_dir
, DSO__NAME_KCORE
, sbuildid
);
131 !build_id_cache__kcore_existing(from_dir
, to_dir
, sizeof(to_dir
))) {
132 pr_debug("same kcore found in %s\n", to_dir
);
136 if (build_id_cache__kcore_dir(dir
, sizeof(dir
)))
139 scnprintf(to_dir
, sizeof(to_dir
), "%s/%s/%s/%s",
140 buildid_dir
, DSO__NAME_KCORE
, sbuildid
, dir
);
142 if (mkdir_p(to_dir
, 0755))
145 if (kcore_copy(from_dir
, to_dir
)) {
146 /* Remove YYYYmmddHHMMSShh directory */
147 if (!rmdir(to_dir
)) {
148 p
= strrchr(to_dir
, '/');
151 /* Try to remove buildid directory */
152 if (!rmdir(to_dir
)) {
153 p
= strrchr(to_dir
, '/');
156 /* Try to remove [kernel.kcore] directory */
163 pr_debug("kcore added to build-id cache directory %s\n", to_dir
);
168 static int build_id_cache__add_file(const char *filename
)
170 char sbuild_id
[SBUILD_ID_SIZE
];
171 u8 build_id
[BUILD_ID_SIZE
];
174 if (filename__read_build_id(filename
, &build_id
, sizeof(build_id
)) < 0) {
175 pr_debug("Couldn't read a build-id in %s\n", filename
);
179 build_id__sprintf(build_id
, sizeof(build_id
), sbuild_id
);
180 err
= build_id_cache__add_s(sbuild_id
, filename
,
182 pr_debug("Adding %s %s: %s\n", sbuild_id
, filename
,
183 err
? "FAIL" : "Ok");
187 static int build_id_cache__remove_file(const char *filename
)
189 u8 build_id
[BUILD_ID_SIZE
];
190 char sbuild_id
[SBUILD_ID_SIZE
];
194 if (filename__read_build_id(filename
, &build_id
, sizeof(build_id
)) < 0) {
195 pr_debug("Couldn't read a build-id in %s\n", filename
);
199 build_id__sprintf(build_id
, sizeof(build_id
), sbuild_id
);
200 err
= build_id_cache__remove_s(sbuild_id
);
201 pr_debug("Removing %s %s: %s\n", sbuild_id
, filename
,
202 err
? "FAIL" : "Ok");
207 static int build_id_cache__purge_path(const char *pathname
)
209 struct strlist
*list
;
210 struct str_node
*pos
;
213 err
= build_id_cache__list_build_ids(pathname
, &list
);
217 strlist__for_each_entry(pos
, list
) {
218 err
= build_id_cache__remove_s(pos
->s
);
219 pr_debug("Removing %s %s: %s\n", pos
->s
, pathname
,
220 err
? "FAIL" : "Ok");
224 strlist__delete(list
);
227 pr_debug("Purging %s: %s\n", pathname
, err
? "FAIL" : "Ok");
232 static bool dso__missing_buildid_cache(struct dso
*dso
, int parm __maybe_unused
)
234 char filename
[PATH_MAX
];
235 u8 build_id
[BUILD_ID_SIZE
];
237 if (dso__build_id_filename(dso
, filename
, sizeof(filename
)) &&
238 filename__read_build_id(filename
, build_id
,
239 sizeof(build_id
)) != sizeof(build_id
)) {
243 pr_warning("Problems with %s file, consider removing it from the cache\n",
245 } else if (memcmp(dso
->build_id
, build_id
, sizeof(dso
->build_id
))) {
246 pr_warning("Problems with %s file, consider removing it from the cache\n",
253 static int build_id_cache__fprintf_missing(struct perf_session
*session
, FILE *fp
)
255 perf_session__fprintf_dsos_buildid(session
, fp
, dso__missing_buildid_cache
, 0);
259 static int build_id_cache__update_file(const char *filename
)
261 u8 build_id
[BUILD_ID_SIZE
];
262 char sbuild_id
[SBUILD_ID_SIZE
];
266 if (filename__read_build_id(filename
, &build_id
, sizeof(build_id
)) < 0) {
267 pr_debug("Couldn't read a build-id in %s\n", filename
);
271 build_id__sprintf(build_id
, sizeof(build_id
), sbuild_id
);
272 if (build_id_cache__cached(sbuild_id
))
273 err
= build_id_cache__remove_s(sbuild_id
);
276 err
= build_id_cache__add_s(sbuild_id
, filename
, false, false);
278 pr_debug("Updating %s %s: %s\n", sbuild_id
, filename
,
279 err
? "FAIL" : "Ok");
284 int cmd_buildid_cache(int argc
, const char **argv
)
286 struct strlist
*list
;
287 struct str_node
*pos
;
290 char const *add_name_list_str
= NULL
,
291 *remove_name_list_str
= NULL
,
292 *purge_name_list_str
= NULL
,
293 *missing_filename
= NULL
,
294 *update_name_list_str
= NULL
,
295 *kcore_filename
= NULL
;
296 char sbuf
[STRERR_BUFSIZE
];
298 struct perf_data_file file
= {
299 .mode
= PERF_DATA_MODE_READ
,
301 struct perf_session
*session
= NULL
;
303 const struct option buildid_cache_options
[] = {
304 OPT_STRING('a', "add", &add_name_list_str
,
305 "file list", "file(s) to add"),
306 OPT_STRING('k', "kcore", &kcore_filename
,
307 "file", "kcore file to add"),
308 OPT_STRING('r', "remove", &remove_name_list_str
, "file list",
309 "file(s) to remove"),
310 OPT_STRING('p', "purge", &purge_name_list_str
, "path list",
311 "path(s) to remove (remove old caches too)"),
312 OPT_STRING('M', "missing", &missing_filename
, "file",
313 "to find missing build ids in the cache"),
314 OPT_BOOLEAN('f', "force", &force
, "don't complain, do it"),
315 OPT_STRING('u', "update", &update_name_list_str
, "file list",
316 "file(s) to update"),
317 OPT_INCR('v', "verbose", &verbose
, "be more verbose"),
320 const char * const buildid_cache_usage
[] = {
321 "perf buildid-cache [<options>]",
325 argc
= parse_options(argc
, argv
, buildid_cache_options
,
326 buildid_cache_usage
, 0);
328 if (argc
|| (!add_name_list_str
&& !kcore_filename
&&
329 !remove_name_list_str
&& !purge_name_list_str
&&
330 !missing_filename
&& !update_name_list_str
))
331 usage_with_options(buildid_cache_usage
, buildid_cache_options
);
333 if (missing_filename
) {
334 file
.path
= missing_filename
;
337 session
= perf_session__new(&file
, false, NULL
);
342 if (symbol__init(session
? &session
->header
.env
: NULL
) < 0)
347 if (add_name_list_str
) {
348 list
= strlist__new(add_name_list_str
, NULL
);
350 strlist__for_each_entry(pos
, list
)
351 if (build_id_cache__add_file(pos
->s
)) {
352 if (errno
== EEXIST
) {
353 pr_debug("%s already in the cache\n",
357 pr_warning("Couldn't add %s: %s\n",
358 pos
->s
, str_error_r(errno
, sbuf
, sizeof(sbuf
)));
361 strlist__delete(list
);
365 if (remove_name_list_str
) {
366 list
= strlist__new(remove_name_list_str
, NULL
);
368 strlist__for_each_entry(pos
, list
)
369 if (build_id_cache__remove_file(pos
->s
)) {
370 if (errno
== ENOENT
) {
371 pr_debug("%s wasn't in the cache\n",
375 pr_warning("Couldn't remove %s: %s\n",
376 pos
->s
, str_error_r(errno
, sbuf
, sizeof(sbuf
)));
379 strlist__delete(list
);
383 if (purge_name_list_str
) {
384 list
= strlist__new(purge_name_list_str
, NULL
);
386 strlist__for_each_entry(pos
, list
)
387 if (build_id_cache__purge_path(pos
->s
)) {
388 if (errno
== ENOENT
) {
389 pr_debug("%s wasn't in the cache\n",
393 pr_warning("Couldn't remove %s: %s\n",
394 pos
->s
, str_error_r(errno
, sbuf
, sizeof(sbuf
)));
397 strlist__delete(list
);
401 if (missing_filename
)
402 ret
= build_id_cache__fprintf_missing(session
, stdout
);
404 if (update_name_list_str
) {
405 list
= strlist__new(update_name_list_str
, NULL
);
407 strlist__for_each_entry(pos
, list
)
408 if (build_id_cache__update_file(pos
->s
)) {
409 if (errno
== ENOENT
) {
410 pr_debug("%s wasn't in the cache\n",
414 pr_warning("Couldn't update %s: %s\n",
415 pos
->s
, str_error_r(errno
, sbuf
, sizeof(sbuf
)));
418 strlist__delete(list
);
422 if (kcore_filename
&& build_id_cache__add_kcore(kcore_filename
, force
))
423 pr_warning("Couldn't add %s\n", kcore_filename
);
426 perf_session__delete(session
);