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Diffstat (limited to 'tools/perf/util/build-id.c')
-rw-r--r--tools/perf/util/build-id.c129
1 files changed, 103 insertions, 26 deletions
diff --git a/tools/perf/util/build-id.c b/tools/perf/util/build-id.c
index e0148b081bdf..c1a06fcd7e70 100644
--- a/tools/perf/util/build-id.c
+++ b/tools/perf/util/build-id.c
@@ -243,12 +243,15 @@ static bool build_id_cache__valid_id(char *sbuild_id)
return result;
}
-static const char *build_id_cache__basename(bool is_kallsyms, bool is_vdso)
+static const char *build_id_cache__basename(bool is_kallsyms, bool is_vdso,
+ bool is_debug)
{
- return is_kallsyms ? "kallsyms" : (is_vdso ? "vdso" : "elf");
+ return is_kallsyms ? "kallsyms" : (is_vdso ? "vdso" : (is_debug ?
+ "debug" : "elf"));
}
-char *dso__build_id_filename(const struct dso *dso, char *bf, size_t size)
+char *dso__build_id_filename(const struct dso *dso, char *bf, size_t size,
+ bool is_debug)
{
bool is_kallsyms = dso__is_kallsyms((struct dso *)dso);
bool is_vdso = dso__is_vdso((struct dso *)dso);
@@ -270,7 +273,8 @@ char *dso__build_id_filename(const struct dso *dso, char *bf, size_t size)
ret = asnprintf(&bf, size, "%s", linkname);
else
ret = asnprintf(&bf, size, "%s/%s", linkname,
- build_id_cache__basename(is_kallsyms, is_vdso));
+ build_id_cache__basename(is_kallsyms, is_vdso,
+ is_debug));
if (ret < 0 || (!alloc && size < (unsigned int)ret))
bf = NULL;
free(linkname);
@@ -285,7 +289,7 @@ char *dso__build_id_filename(const struct dso *dso, char *bf, size_t size)
else
static int write_buildid(const char *name, size_t name_len, u8 *build_id,
- pid_t pid, u16 misc, int fd)
+ pid_t pid, u16 misc, struct feat_fd *fd)
{
int err;
struct build_id_event b;
@@ -300,14 +304,15 @@ static int write_buildid(const char *name, size_t name_len, u8 *build_id,
b.header.misc = misc;
b.header.size = sizeof(b) + len;
- err = writen(fd, &b, sizeof(b));
+ err = do_write(fd, &b, sizeof(b));
if (err < 0)
return err;
return write_padded(fd, name, name_len + 1, len);
}
-static int machine__write_buildid_table(struct machine *machine, int fd)
+static int machine__write_buildid_table(struct machine *machine,
+ struct feat_fd *fd)
{
int err = 0;
char nm[PATH_MAX];
@@ -352,7 +357,8 @@ static int machine__write_buildid_table(struct machine *machine, int fd)
return err;
}
-int perf_session__write_buildid_table(struct perf_session *session, int fd)
+int perf_session__write_buildid_table(struct perf_session *session,
+ struct feat_fd *fd)
{
struct rb_node *nd;
int err = machine__write_buildid_table(&session->machines.host, fd);
@@ -534,13 +540,14 @@ char *build_id_cache__complement(const char *incomplete_sbuild_id)
}
char *build_id_cache__cachedir(const char *sbuild_id, const char *name,
- bool is_kallsyms, bool is_vdso)
+ struct nsinfo *nsi, bool is_kallsyms,
+ bool is_vdso)
{
char *realname = (char *)name, *filename;
bool slash = is_kallsyms || is_vdso;
if (!slash) {
- realname = realpath(name, NULL);
+ realname = nsinfo__realpath(name, nsi);
if (!realname)
return NULL;
}
@@ -556,13 +563,13 @@ char *build_id_cache__cachedir(const char *sbuild_id, const char *name,
return filename;
}
-int build_id_cache__list_build_ids(const char *pathname,
+int build_id_cache__list_build_ids(const char *pathname, struct nsinfo *nsi,
struct strlist **result)
{
char *dir_name;
int ret = 0;
- dir_name = build_id_cache__cachedir(NULL, pathname, false, false);
+ dir_name = build_id_cache__cachedir(NULL, pathname, nsi, false, false);
if (!dir_name)
return -ENOMEM;
@@ -576,16 +583,20 @@ int build_id_cache__list_build_ids(const char *pathname,
#if defined(HAVE_LIBELF_SUPPORT) && defined(HAVE_GELF_GETNOTE_SUPPORT)
static int build_id_cache__add_sdt_cache(const char *sbuild_id,
- const char *realname)
+ const char *realname,
+ struct nsinfo *nsi)
{
struct probe_cache *cache;
int ret;
+ struct nscookie nsc;
- cache = probe_cache__new(sbuild_id);
+ cache = probe_cache__new(sbuild_id, nsi);
if (!cache)
return -1;
+ nsinfo__mountns_enter(nsi, &nsc);
ret = probe_cache__scan_sdt(cache, realname);
+ nsinfo__mountns_exit(&nsc);
if (ret >= 0) {
pr_debug4("Found %d SDTs in %s\n", ret, realname);
if (probe_cache__commit(cache) < 0)
@@ -595,25 +606,56 @@ static int build_id_cache__add_sdt_cache(const char *sbuild_id,
return ret;
}
#else
-#define build_id_cache__add_sdt_cache(sbuild_id, realname) (0)
+#define build_id_cache__add_sdt_cache(sbuild_id, realname, nsi) (0)
#endif
+static char *build_id_cache__find_debug(const char *sbuild_id,
+ struct nsinfo *nsi)
+{
+ char *realname = NULL;
+ char *debugfile;
+ struct nscookie nsc;
+ size_t len = 0;
+
+ debugfile = calloc(1, PATH_MAX);
+ if (!debugfile)
+ goto out;
+
+ len = __symbol__join_symfs(debugfile, PATH_MAX,
+ "/usr/lib/debug/.build-id/");
+ snprintf(debugfile + len, PATH_MAX - len, "%.2s/%s.debug", sbuild_id,
+ sbuild_id + 2);
+
+ nsinfo__mountns_enter(nsi, &nsc);
+ realname = realpath(debugfile, NULL);
+ if (realname && access(realname, R_OK))
+ zfree(&realname);
+ nsinfo__mountns_exit(&nsc);
+out:
+ free(debugfile);
+ return realname;
+}
+
int build_id_cache__add_s(const char *sbuild_id, const char *name,
- bool is_kallsyms, bool is_vdso)
+ struct nsinfo *nsi, bool is_kallsyms, bool is_vdso)
{
const size_t size = PATH_MAX;
char *realname = NULL, *filename = NULL, *dir_name = NULL,
*linkname = zalloc(size), *tmp;
+ char *debugfile = NULL;
int err = -1;
if (!is_kallsyms) {
- realname = realpath(name, NULL);
+ if (!is_vdso)
+ realname = nsinfo__realpath(name, nsi);
+ else
+ realname = realpath(name, NULL);
if (!realname)
goto out_free;
}
- dir_name = build_id_cache__cachedir(sbuild_id, name,
- is_kallsyms, is_vdso);
+ dir_name = build_id_cache__cachedir(sbuild_id, name, nsi, is_kallsyms,
+ is_vdso);
if (!dir_name)
goto out_free;
@@ -627,20 +669,52 @@ int build_id_cache__add_s(const char *sbuild_id, const char *name,
/* Save the allocated buildid dirname */
if (asprintf(&filename, "%s/%s", dir_name,
- build_id_cache__basename(is_kallsyms, is_vdso)) < 0) {
+ build_id_cache__basename(is_kallsyms, is_vdso,
+ false)) < 0) {
filename = NULL;
goto out_free;
}
if (access(filename, F_OK)) {
if (is_kallsyms) {
- if (copyfile("/proc/kallsyms", filename))
+ if (copyfile("/proc/kallsyms", filename))
+ goto out_free;
+ } else if (nsi && nsi->need_setns) {
+ if (copyfile_ns(name, filename, nsi))
goto out_free;
} else if (link(realname, filename) && errno != EEXIST &&
copyfile(name, filename))
goto out_free;
}
+ /* Some binaries are stripped, but have .debug files with their symbol
+ * table. Check to see if we can locate one of those, since the elf
+ * file itself may not be very useful to users of our tools without a
+ * symtab.
+ */
+ if (!is_kallsyms && !is_vdso &&
+ strncmp(".ko", name + strlen(name) - 3, 3)) {
+ debugfile = build_id_cache__find_debug(sbuild_id, nsi);
+ if (debugfile) {
+ zfree(&filename);
+ if (asprintf(&filename, "%s/%s", dir_name,
+ build_id_cache__basename(false, false, true)) < 0) {
+ filename = NULL;
+ goto out_free;
+ }
+ if (access(filename, F_OK)) {
+ if (nsi && nsi->need_setns) {
+ if (copyfile_ns(debugfile, filename,
+ nsi))
+ goto out_free;
+ } else if (link(debugfile, filename) &&
+ errno != EEXIST &&
+ copyfile(debugfile, filename))
+ goto out_free;
+ }
+ }
+ }
+
if (!build_id_cache__linkname(sbuild_id, linkname, size))
goto out_free;
tmp = strrchr(linkname, '/');
@@ -657,27 +731,30 @@ int build_id_cache__add_s(const char *sbuild_id, const char *name,
err = 0;
/* Update SDT cache : error is just warned */
- if (realname && build_id_cache__add_sdt_cache(sbuild_id, realname) < 0)
+ if (realname &&
+ build_id_cache__add_sdt_cache(sbuild_id, realname, nsi) < 0)
pr_debug4("Failed to update/scan SDT cache for %s\n", realname);
out_free:
if (!is_kallsyms)
free(realname);
free(filename);
+ free(debugfile);
free(dir_name);
free(linkname);
return err;
}
static int build_id_cache__add_b(const u8 *build_id, size_t build_id_size,
- const char *name, bool is_kallsyms,
- bool is_vdso)
+ const char *name, struct nsinfo *nsi,
+ bool is_kallsyms, bool is_vdso)
{
char sbuild_id[SBUILD_ID_SIZE];
build_id__sprintf(build_id, build_id_size, sbuild_id);
- return build_id_cache__add_s(sbuild_id, name, is_kallsyms, is_vdso);
+ return build_id_cache__add_s(sbuild_id, name, nsi, is_kallsyms,
+ is_vdso);
}
bool build_id_cache__cached(const char *sbuild_id)
@@ -743,7 +820,7 @@ static int dso__cache_build_id(struct dso *dso, struct machine *machine)
name = nm;
}
return build_id_cache__add_b(dso->build_id, sizeof(dso->build_id), name,
- is_kallsyms, is_vdso);
+ dso->nsinfo, is_kallsyms, is_vdso);
}
static int __dsos__cache_build_ids(struct list_head *head,
generated by cgit v1.2.3-70-g09d2 (git 2.51.1) at 2025-11-04 06:49:40 +0000