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 addr1
= kallsyms__get_function_start(from
, name
);
64 addr2
= kallsyms__get_function_start(to
, name
);
66 return addr1
== addr2
;
69 static int build_id_cache__kcore_existing(const char *from_dir
, char *to_dir
,
74 char to_subdir
[PATH_MAX
];
83 scnprintf(from
, sizeof(from
), "%s/modules", from_dir
);
89 if (dent
->d_type
!= DT_DIR
)
91 scnprintf(to
, sizeof(to
), "%s/%s/modules", to_dir
,
93 scnprintf(to_subdir
, sizeof(to_subdir
), "%s/%s",
94 to_dir
, dent
->d_name
);
95 if (!compare_proc_modules(from
, to
) &&
96 same_kallsyms_reloc(from_dir
, to_subdir
)) {
97 strlcpy(to_dir
, to_subdir
, to_dir_sz
);
108 static int build_id_cache__add_kcore(const char *filename
, bool force
)
110 char dir
[32], sbuildid
[SBUILD_ID_SIZE
];
111 char from_dir
[PATH_MAX
], to_dir
[PATH_MAX
];
114 strlcpy(from_dir
, filename
, sizeof(from_dir
));
116 p
= strrchr(from_dir
, '/');
117 if (!p
|| strcmp(p
+ 1, "kcore"))
121 if (build_id_cache__kcore_buildid(from_dir
, sbuildid
) < 0)
124 scnprintf(to_dir
, sizeof(to_dir
), "%s/%s/%s",
125 buildid_dir
, DSO__NAME_KCORE
, sbuildid
);
128 !build_id_cache__kcore_existing(from_dir
, to_dir
, sizeof(to_dir
))) {
129 pr_debug("same kcore found in %s\n", to_dir
);
133 if (build_id_cache__kcore_dir(dir
, sizeof(dir
)))
136 scnprintf(to_dir
, sizeof(to_dir
), "%s/%s/%s/%s",
137 buildid_dir
, DSO__NAME_KCORE
, sbuildid
, dir
);
139 if (mkdir_p(to_dir
, 0755))
142 if (kcore_copy(from_dir
, to_dir
)) {
143 /* Remove YYYYmmddHHMMSShh directory */
144 if (!rmdir(to_dir
)) {
145 p
= strrchr(to_dir
, '/');
148 /* Try to remove buildid directory */
149 if (!rmdir(to_dir
)) {
150 p
= strrchr(to_dir
, '/');
153 /* Try to remove [kernel.kcore] directory */
160 pr_debug("kcore added to build-id cache directory %s\n", to_dir
);
165 static int build_id_cache__add_file(const char *filename
)
167 char sbuild_id
[SBUILD_ID_SIZE
];
168 u8 build_id
[BUILD_ID_SIZE
];
171 if (filename__read_build_id(filename
, &build_id
, sizeof(build_id
)) < 0) {
172 pr_debug("Couldn't read a build-id in %s\n", filename
);
176 build_id__sprintf(build_id
, sizeof(build_id
), sbuild_id
);
177 err
= build_id_cache__add_s(sbuild_id
, filename
,
179 pr_debug("Adding %s %s: %s\n", sbuild_id
, filename
,
180 err
? "FAIL" : "Ok");
184 static int build_id_cache__remove_file(const char *filename
)
186 u8 build_id
[BUILD_ID_SIZE
];
187 char sbuild_id
[SBUILD_ID_SIZE
];
191 if (filename__read_build_id(filename
, &build_id
, sizeof(build_id
)) < 0) {
192 pr_debug("Couldn't read a build-id in %s\n", filename
);
196 build_id__sprintf(build_id
, sizeof(build_id
), sbuild_id
);
197 err
= build_id_cache__remove_s(sbuild_id
);
198 pr_debug("Removing %s %s: %s\n", sbuild_id
, filename
,
199 err
? "FAIL" : "Ok");
204 static int build_id_cache__purge_path(const char *pathname
)
206 struct strlist
*list
;
207 struct str_node
*pos
;
210 err
= build_id_cache__list_build_ids(pathname
, &list
);
214 strlist__for_each_entry(pos
, list
) {
215 err
= build_id_cache__remove_s(pos
->s
);
216 pr_debug("Removing %s %s: %s\n", pos
->s
, pathname
,
217 err
? "FAIL" : "Ok");
221 strlist__delete(list
);
224 pr_debug("Purging %s: %s\n", pathname
, err
? "FAIL" : "Ok");
229 static bool dso__missing_buildid_cache(struct dso
*dso
, int parm __maybe_unused
)
231 char filename
[PATH_MAX
];
232 u8 build_id
[BUILD_ID_SIZE
];
234 if (dso__build_id_filename(dso
, filename
, sizeof(filename
)) &&
235 filename__read_build_id(filename
, build_id
,
236 sizeof(build_id
)) != sizeof(build_id
)) {
240 pr_warning("Problems with %s file, consider removing it from the cache\n",
242 } else if (memcmp(dso
->build_id
, build_id
, sizeof(dso
->build_id
))) {
243 pr_warning("Problems with %s file, consider removing it from the cache\n",
250 static int build_id_cache__fprintf_missing(struct perf_session
*session
, FILE *fp
)
252 perf_session__fprintf_dsos_buildid(session
, fp
, dso__missing_buildid_cache
, 0);
256 static int build_id_cache__update_file(const char *filename
)
258 u8 build_id
[BUILD_ID_SIZE
];
259 char sbuild_id
[SBUILD_ID_SIZE
];
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 if (build_id_cache__cached(sbuild_id
))
270 err
= build_id_cache__remove_s(sbuild_id
);
273 err
= build_id_cache__add_s(sbuild_id
, filename
, false, false);
275 pr_debug("Updating %s %s: %s\n", sbuild_id
, filename
,
276 err
? "FAIL" : "Ok");
281 int cmd_buildid_cache(int argc
, const char **argv
)
283 struct strlist
*list
;
284 struct str_node
*pos
;
287 char const *add_name_list_str
= NULL
,
288 *remove_name_list_str
= NULL
,
289 *purge_name_list_str
= NULL
,
290 *missing_filename
= NULL
,
291 *update_name_list_str
= NULL
,
292 *kcore_filename
= NULL
;
293 char sbuf
[STRERR_BUFSIZE
];
295 struct perf_data_file file
= {
296 .mode
= PERF_DATA_MODE_READ
,
298 struct perf_session
*session
= NULL
;
300 const struct option buildid_cache_options
[] = {
301 OPT_STRING('a', "add", &add_name_list_str
,
302 "file list", "file(s) to add"),
303 OPT_STRING('k', "kcore", &kcore_filename
,
304 "file", "kcore file to add"),
305 OPT_STRING('r', "remove", &remove_name_list_str
, "file list",
306 "file(s) to remove"),
307 OPT_STRING('p', "purge", &purge_name_list_str
, "path list",
308 "path(s) to remove (remove old caches too)"),
309 OPT_STRING('M', "missing", &missing_filename
, "file",
310 "to find missing build ids in the cache"),
311 OPT_BOOLEAN('f', "force", &force
, "don't complain, do it"),
312 OPT_STRING('u', "update", &update_name_list_str
, "file list",
313 "file(s) to update"),
314 OPT_INCR('v', "verbose", &verbose
, "be more verbose"),
317 const char * const buildid_cache_usage
[] = {
318 "perf buildid-cache [<options>]",
322 argc
= parse_options(argc
, argv
, buildid_cache_options
,
323 buildid_cache_usage
, 0);
325 if (argc
|| (!add_name_list_str
&& !kcore_filename
&&
326 !remove_name_list_str
&& !purge_name_list_str
&&
327 !missing_filename
&& !update_name_list_str
))
328 usage_with_options(buildid_cache_usage
, buildid_cache_options
);
330 if (missing_filename
) {
331 file
.path
= missing_filename
;
334 session
= perf_session__new(&file
, false, NULL
);
339 if (symbol__init(session
? &session
->header
.env
: NULL
) < 0)
344 if (add_name_list_str
) {
345 list
= strlist__new(add_name_list_str
, NULL
);
347 strlist__for_each_entry(pos
, list
)
348 if (build_id_cache__add_file(pos
->s
)) {
349 if (errno
== EEXIST
) {
350 pr_debug("%s already in the cache\n",
354 pr_warning("Couldn't add %s: %s\n",
355 pos
->s
, str_error_r(errno
, sbuf
, sizeof(sbuf
)));
358 strlist__delete(list
);
362 if (remove_name_list_str
) {
363 list
= strlist__new(remove_name_list_str
, NULL
);
365 strlist__for_each_entry(pos
, list
)
366 if (build_id_cache__remove_file(pos
->s
)) {
367 if (errno
== ENOENT
) {
368 pr_debug("%s wasn't in the cache\n",
372 pr_warning("Couldn't remove %s: %s\n",
373 pos
->s
, str_error_r(errno
, sbuf
, sizeof(sbuf
)));
376 strlist__delete(list
);
380 if (purge_name_list_str
) {
381 list
= strlist__new(purge_name_list_str
, NULL
);
383 strlist__for_each_entry(pos
, list
)
384 if (build_id_cache__purge_path(pos
->s
)) {
385 if (errno
== ENOENT
) {
386 pr_debug("%s wasn't in the cache\n",
390 pr_warning("Couldn't remove %s: %s\n",
391 pos
->s
, str_error_r(errno
, sbuf
, sizeof(sbuf
)));
394 strlist__delete(list
);
398 if (missing_filename
)
399 ret
= build_id_cache__fprintf_missing(session
, stdout
);
401 if (update_name_list_str
) {
402 list
= strlist__new(update_name_list_str
, NULL
);
404 strlist__for_each_entry(pos
, list
)
405 if (build_id_cache__update_file(pos
->s
)) {
406 if (errno
== ENOENT
) {
407 pr_debug("%s wasn't in the cache\n",
411 pr_warning("Couldn't update %s: %s\n",
412 pos
->s
, str_error_r(errno
, sbuf
, sizeof(sbuf
)));
415 strlist__delete(list
);
419 if (kcore_filename
&& build_id_cache__add_kcore(kcore_filename
, force
))
420 pr_warning("Couldn't add %s\n", kcore_filename
);
423 perf_session__delete(session
);