ANDROID: futex: Skip when futex_waitv/shmget not implemented

getshm and futex_waitv are not implemented in Android.  These rely on
System V shared memory functions which is disallowed by selinux.

Bug: 31590178
Bug: 189333904
Bug: 234151152
Change-Id: I9930a5b336fe1368afd6e5744d6246577cb4b7c8
Signed-off-by: Edward Liaw <edliaw@google.com>

tools/testing/selftests/futex/functional/futex_wait.c

@@ -96,6 +96,11 @@ int main(int argc, char *argv[])
 	/* Testing an anon page shared memory */
 	shm_id = shmget(IPC_PRIVATE, 4096, IPC_CREAT | 0666);
 	if (shm_id < 0) {
+		if (errno == ENOSYS) {
+			ksft_test_result_skip("shmget returned: %d %s\n",
+					      errno, strerror(errno));
+			goto skip_anon_page_shared_memory_test;
+		}
 		perror("shmget");
 		exit(1);
 	}
@@ -121,6 +126,7 @@ int main(int argc, char *argv[])
 		ksft_test_result_pass("futex_wake shared (page anon) succeeds\n");
 	}
 
+skip_anon_page_shared_memory_test:
 
 	/* Testing a file backed shared memory */
 	fd = open(SHM_PATH, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR);

tools/testing/selftests/futex/functional/futex_wait_timeout.c

@@ -64,9 +64,14 @@ void *get_pi_lock(void *arg)
 static void test_timeout(int res, int *ret, char *test_name, int err)
 {
 	if (!res || errno != err) {
-		ksft_test_result_fail("%s returned %d\n", test_name,
-				      res < 0 ? errno : res);
-		*ret = RET_FAIL;
+		if (errno == ENOSYS) {
+			ksft_test_result_skip("%s returned %d\n", test_name,
+					      errno);
+		} else {
+			ksft_test_result_fail("%s returned %d\n", test_name,
+					      res < 0 ? errno : res);
+			*ret = RET_FAIL;
+		}
 	} else {
 		ksft_test_result_pass("%s succeeds\n", test_name);
 	}

tools/testing/selftests/futex/functional/futex_wait_wouldblock.c

@@ -98,10 +98,15 @@ int main(int argc, char *argv[])
 	info("Calling futex_waitv on f1: %u @ %p with val=%u\n", f1, &f1, f1+1);
 	res = futex_waitv(&waitv, 1, 0, &to, CLOCK_MONOTONIC);
 	if (!res || errno != EWOULDBLOCK) {
-		ksft_test_result_pass("futex_waitv returned: %d %s\n",
-				      res ? errno : res,
-				      res ? strerror(errno) : "");
-		ret = RET_FAIL;
+		if (errno == ENOSYS) {
+			ksft_test_result_skip("futex_waitv returned %d\n",
+					      errno);
+		} else {
+			ksft_test_result_fail("futex_waitv returned: %d %s\n",
+					      res ? errno : res,
+					      res ? strerror(errno) : "");
+			ret = RET_FAIL;
+		}
 	} else {
 		ksft_test_result_pass("futex_waitv\n");
 	}