On Mon, May 11, 2015 at 12:28:35PM +0000, He Kuang wrote:
> WEXITSTATUS consists of the least significant 8 bits of the status
> argument, so we should convert the value to signed char if we have valid
> negative exit codes. And the return value of test->func() contains
> negative values:
>
> enum {
> TEST_OK = 0,
> TEST_FAIL = -1,
> TEST_SKIP = -2,
> };
>
> Before this patch:
>
> $ perf test -v 1
> ...
> test child finished with 254
> ---- end ----
> vmlinux symtab matches kallsyms: FAILED!
>
> After this patch:
>
> $ perf test -v 1
> ...
> test child finished with -2
> ---- end ----
> vmlinux symtab matches kallsyms: Skip
Acked-by: Jiri Olsa <jo...@kernel.org>
thanks,
jirka
>
> Signed-off-by: He Kuang <heku...@huawei.com>
> ---
> tools/perf/tests/builtin-test.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
> index 4f40981..f42af98 100644
> --- a/tools/perf/tests/builtin-test.c
> +++ b/tools/perf/tests/builtin-test.c
> @@ -219,7 +219,7 @@ static int run_test(struct test *test)
> wait(&status);
>
> if (WIFEXITED(status)) {
> - err = WEXITSTATUS(status);
> + err = (signed char)WEXITSTATUS(status);
> pr_debug("test child finished with %d\n", err);
> } else if (WIFSIGNALED(status)) {
> err = -1;
> --
> 1.8.5.2
>
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