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| author | Namhyung Kim <namhyung@kernel.org> | 2017-06-08 10:31:01 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2017-06-08 21:38:41 +0300 |
| commit | 3619ef76b37d4803bc9daee9d03d82c8526db378 (patch) | |
| tree | f56d049b9c428c4b2c2c1b9dd64399548272dd58 | |
| parent | 14fc42fa1b3e7ea5160c84d0e686a3a0c1ffe619 (diff) | |
| download | linux-3619ef76b37d4803bc9daee9d03d82c8526db378.tar.xz | |
perf annotate: Fix symbolic link of build-id cache
The commit 6ebd2547dd24 ("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: 6ebd2547dd24 ("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>
| -rw-r--r-- | tools/perf/util/annotate.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c index 1367d7e35242..df4486c3a2fa 100644 --- a/tools/perf/util/annotate.c +++ b/tools/perf/util/annotate.c @@ -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)) @@ -1340,7 +1341,14 @@ static int dso__disassemble_filename(struct dso *dso, char *filename, size_t fil if (!build_id_path) return -1; - dirname(build_id_path); + /* + * 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) || readlink(build_id_path, linkname, sizeof(linkname)) < 0 || |