perf tools: Change perf_mem__snp_scnprintf to return nb of displayed bytes
Moving strncat/strcpy calls into scnprintf to easily track number of
displayed bytes. It will be used in following patch.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1456303616-26926-12-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/mem-events.c b/tools/perf/util/mem-events.c
index 249250f..de981dd 100644
--- a/tools/perf/util/mem-events.c
+++ b/tools/perf/util/mem-events.c
@@ -194,7 +194,7 @@
"HitM",
};
-void perf_mem__snp_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
+int perf_mem__snp_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
{
size_t i, l = 0;
u64 m = PERF_MEM_SNOOP_NA;
@@ -212,12 +212,13 @@
strcat(out, " or ");
l += 4;
}
- strncat(out, snoop_access[i], sz - l);
- l += strlen(snoop_access[i]);
+ l += scnprintf(out + l, sz - l, snoop_access[i]);
}
if (*out == '\0')
- strcpy(out, "N/A");
+ l += scnprintf(out, sz - l, "N/A");
+
+ return l;
}
void perf_mem__lck_scnprintf(char *out, size_t sz __maybe_unused,