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perf annotate: Fix symbolic link of build-id cache

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The commit 6ebd2547dd ("perf annotate: Fix a bug following symbolic
link of a build-id file") changed to use dirname to follow the symlink.
But it only considers new-style build-id cache names so old names fail
on readlink() and force to use system path which might not available.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Taeung Song <treeze.taeung@gmail.com>
Cc: Wang Nan <wangnan0@huawei.com>
Cc: kernel-team@lge.com
Fixes: 6ebd2547dd ("perf annotate: Fix a bug following symbolic link of a build-id file")
Link: http://lkml.kernel.org/r/20170608073109.30699-2-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim 2017-06-08 16:31:01 +09:00 committed by Arnaldo Carvalho de Melo
parent 14fc42fa1b
commit 3619ef76b3
1 changed files with 9 additions and 1 deletions
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8
tools/perf/util/annotate.c
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@ -1321,6 +1321,7 @@ static int dso__disassemble_filename(struct dso *dso, char *filename, size_t fil
char linkname[PATH_MAX];
char *build_id_filename;
char *build_id_path = NULL;
char *pos;
if (dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS &&
!dso__is_kcore(dso))
@ -1340,6 +1341,13 @@ static int dso__disassemble_filename(struct dso *dso, char *filename, size_t fil
if (!build_id_path)
return -1;
/*
* old style build-id cache has name of XX/XXXXXXX.. while
* new style has XX/XXXXXXX../{elf,kallsyms,vdso}.
* extract the build-id part of dirname in the new style only.
*/
pos = strrchr(build_id_path, '/');
if (pos && strlen(pos) < SBUILD_ID_SIZE - 2)
dirname(build_id_path);
if (dso__is_kcore(dso) ||