diff options
Diffstat (limited to 'tools/perf/util/build-id.c')
| -rw-r--r-- | tools/perf/util/build-id.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/tools/perf/util/build-id.c b/tools/perf/util/build-id.c index e528c40739cc..33af67530d30 100644 --- a/tools/perf/util/build-id.c +++ b/tools/perf/util/build-id.c @@ -182,13 +182,17 @@ char *build_id_cache__origname(const char *sbuild_id) char buf[PATH_MAX]; char *ret = NULL, *p; size_t offs = 5; /* == strlen("../..") */ + ssize_t len; linkname = build_id_cache__linkname(sbuild_id, NULL, 0); if (!linkname) return NULL; - if (readlink(linkname, buf, PATH_MAX) < 0) + len = readlink(linkname, buf, sizeof(buf) - 1); + if (len <= 0) goto out; + buf[len] = '\0'; + /* The link should be "../..<origpath>/<sbuild_id>" */ p = strrchr(buf, '/'); /* Cut off the "/<sbuild_id>" */ if (p && (p > buf + offs)) { @@ -690,7 +694,7 @@ int build_id_cache__add_s(const char *sbuild_id, const char *name, err = 0; /* Update SDT cache : error is just warned */ - if (build_id_cache__add_sdt_cache(sbuild_id, realname) < 0) + if (realname && build_id_cache__add_sdt_cache(sbuild_id, realname) < 0) pr_debug4("Failed to update/scan SDT cache for %s\n", realname); out_free: |