Commit be82fddc authored by Ian Rogers's avatar Ian Rogers Committed by Arnaldo Carvalho de Melo
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libperf tests: Avoid uninitialized variable warning 



The variable 'bf' is read (for a write call) without being initialized
triggering a memory sanitizer warning. Use 'bf' in the read and switch
the write to reading from a string.

Signed-off-by: default avatarIan Rogers <irogers@google.com>
Acked-by: default avatarJiri Olsa <jolsa@redhat.com>
Acked-by: default avatarNamhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20210114212304.4018119-1-irogers@google.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent a042a82d

tools/lib/perf/tests/test-evlist.c

+2 −2
Original line number Diff line number Diff line
@@ -208,7 +208,6 @@ static int test_mmap_thread(void) 
	char path[PATH_MAX];

	int id, err, pid, go_pipe[2];

	union perf_event *event;

	char bf;

	int count = 0;



	snprintf(path, PATH_MAX, "%s/kernel/debug/tracing/events/syscalls/sys_enter_prctl/id",
@@ -229,6 +228,7 @@ static int test_mmap_thread(void) 
	pid = fork();

	if (!pid) {

		int i;

		char bf;



		read(go_pipe[0], &bf, 1);
@@ -266,7 +266,7 @@ static int test_mmap_thread(void) 
	perf_evlist__enable(evlist);



	/* kick the child and wait for it to finish */

	write(go_pipe[1], &bf, 1);

	write(go_pipe[1], "A", 1);

	waitpid(pid, NULL, 0);



	/*