tests: check if SSE registers are preserved on context switches

1 files changed, 7 insertions, 5 deletions

diff --git a/src/cmd/tests/tests.c b/src/cmd/tests/tests.c
index 2b66b43..debd095 100644
--- a/src/cmd/tests/tests.c
+++ b/src/cmd/tests/tests.c
@@ -21,7 +21,7 @@ void run_test_inner(void (*fn)(), const char *s) {
 		if (waitpid(pid, &status, 0) != pid) {
 			test_failf("%s", "waitpid returned something weird");
 		} else if (WEXITSTATUS(status) != 0) {
-			test_failf("%s exited with %d", s, WEXITSTATUS(status));
+			test_failf("%s exited with %d, pid %d", s, WEXITSTATUS(status), pid);
 		}
 	}
 }
@@ -62,13 +62,15 @@ int main(void) {
 		r_s_ringbuf();
 		exit(0);
 	} else {
-		for (;;) {
+		for (int i = 0; ; i++) {
 			char buf[128];
 			long ret = _sys_read(reader, buf, sizeof buf, 0);
 			if (ret < 0) break;
-			printf("\033[31mFAIL\033[0m ");
-			fwrite(buf, ret, 1, stdout);
-			printf("\n");
+			printf("\033[31mFAIL\033[0m %3d %.*s\n", i, (int)ret, buf);
+			if (i == 100) {
+				printf("quitting due to too many errors\n");
+				break;
+			}
 		}
 	}
 	return 0;