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-rw-r--r--tools/perf/util/build-id.c19
1 files changed, 18 insertions, 1 deletions
diff --git a/tools/perf/util/build-id.c b/tools/perf/util/build-id.c
index 2aacc8b29f7e..4a391f13f40d 100644
--- a/tools/perf/util/build-id.c
+++ b/tools/perf/util/build-id.c
@@ -755,8 +755,25 @@ int build_id_cache__add_s(const char *sbuild_id, const char *name,
tmp = dir_name + strlen(buildid_dir) - 5;
memcpy(tmp, "../..", 5);
- if (symlink(tmp, linkname) == 0)
+ if (symlink(tmp, linkname) == 0) {
err = 0;
+ } else if (errno == EEXIST) {
+ char path[PATH_MAX];
+ ssize_t len;
+
+ len = readlink(linkname, path, sizeof(path) - 1);
+ if (len <= 0) {
+ pr_err("Cant read link: %s\n", linkname);
+ goto out_free;
+ }
+ path[len] = '\0';
+
+ if (strcmp(tmp, path)) {
+ pr_debug("build <%s> already linked to %s\n",
+ sbuild_id, linkname);
+ }
+ err = 0;
+ }
/* Update SDT cache : error is just warned */
if (realname &&