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perf tools: Initialize output buffer in build_id__sprintf 

We display garbage for undefined build_id objects, because we don't
initialize the output buffer.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20201101233103.3537427-1-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2020-11-02 00:31:02 +01:00 committed by Arnaldo Carvalho de Melo
parent 86449b12f6
commit 6311951d4f
1 changed files with 2 additions and 0 deletions
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2
tools/perf/util/build-id.c
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@ -102,6 +102,8 @@ int build_id__sprintf(const struct build_id *build_id, char *bf)
const u8 *raw = build_id->data;
size_t i;
bf[0] = 0x0;
for (i = 0; i < build_id->size; ++i) {
sprintf(bid, "%02x", *raw);
++raw;