The --kernel option of perf buildid-list tool should show the running
kernel buildid. The functionality has been lost during other changes
of the related code. The build_id__sprintf() function should return
length of the build-id string, but it was the length of the build-id
raw data instead. Due to that, some return value checking caused that
the final string was not printed out.
With this patch the build_id__sprintf() returns the correct value, so
the --kernel option works again.
Before:
# perf buildid-list --kernel
#
After:
# perf buildid-list --kernel
972c1edab5bdc06cc224af45d510af662a3c6972
#
Signed-off-by: Michael Petlan <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Masami Hiramatsu <[email protected]>
---
tools/perf/util/build-id.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/perf/util/build-id.c b/tools/perf/util/build-id.c
index 217b5a6..6a7e273 100644
--- a/tools/perf/util/build-id.c
+++ b/tools/perf/util/build-id.c
@@ -91,7 +91,7 @@ int build_id__sprintf(const u8 *build_id, int len, char *bf)
bid += 2;
}
- return raw - build_id;
+ return (bid - bf) + 1;
}
int sysfs__sprintf_build_id(const char *root_dir, char *sbuild_id)
--
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