linux-kernel - [PATCH 09/35] perf buildid-cache: Do not require purge files to also be in the file system

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Date:   Mon, 11 Jul 2022 12:31:52 +0300
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Jiri Olsa <jolsa@...hat.com>, Namhyung Kim <namhyung@...nel.org>,
        Ian Rogers <irogers@...gle.com>,
        Andi Kleen <ak@...ux.intel.com>, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org
Subject: [PATCH 09/35] perf buildid-cache: Do not require purge files to also be in the file system

realname() returns NULL if the file is not in the file system, but we can
still remove it from the build ID cache in that case, so continue and
attempt the purge with the name provided.

Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
---
 tools/perf/util/build-id.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/tools/perf/util/build-id.c b/tools/perf/util/build-id.c
index 7c9f441936ee..9e176146eb10 100644
--- a/tools/perf/util/build-id.c
+++ b/tools/perf/util/build-id.c
@@ -561,14 +561,11 @@ char *build_id_cache__cachedir(const char *sbuild_id, const char *name,
 	char *realname = (char *)name, *filename;
 	bool slash = is_kallsyms || is_vdso;
 
-	if (!slash) {
+	if (!slash)
 		realname = nsinfo__realpath(name, nsi);
-		if (!realname)
-			return NULL;
-	}
 
 	if (asprintf(&filename, "%s%s%s%s%s", buildid_dir, slash ? "/" : "",
-		     is_vdso ? DSO__NAME_VDSO : realname,
+		     is_vdso ? DSO__NAME_VDSO : (realname ? realname : name),
 		     sbuild_id ? "/" : "", sbuild_id ?: "") < 0)
 		filename = NULL;
 
-- 
2.25.1