From: Ammar Faizi <[email protected]>
Test the sigaction() function implementation. Test steps:
- Set a signal handler.
- Then send a signal to itself using the kill() syscall.
- The program has to survive and store the caught signal number in a
volatile global variable.
- Validate the volatile global variable value.
- Restore the original signal handler.
Signed-off-by: Ammar Faizi <[email protected]>
---
tools/testing/selftests/nolibc/nolibc-test.c | 127 +++++++++++++++++++
1 file changed, 127 insertions(+)
diff --git a/tools/testing/selftests/nolibc/nolibc-test.c b/tools/testing/selftests/nolibc/nolibc-test.c
index cb6ec9f71aae..946ed0132f93 100644
--- a/tools/testing/selftests/nolibc/nolibc-test.c
+++ b/tools/testing/selftests/nolibc/nolibc-test.c
@@ -515,6 +515,131 @@ static int test_fork(void)
return 0;
}
+static volatile int g_test_sig;
+
+static void test_signal_handler(int sig)
+{
+ g_test_sig = sig;
+}
+
+static int test_sigaction_sig(int sig)
+{
+ const struct sigaction new = {
+ .sa_handler = test_signal_handler
+ };
+ struct sigaction old;
+ int ret;
+
+ /*
+ * Set the signal handler.
+ */
+ ret = sigaction(sig, &new, &old);
+ if (ret) {
+ printf("test_sigaction_sig(%d): Failed to set a signal handler\n", sig);
+ return ret;
+ }
+
+ /*
+ * Test the signal handler.
+ */
+ g_test_sig = 0;
+ kill(getpid(), sig);
+
+ /*
+ * test_signal_handler() must set @g_test_sig to @sig.
+ */
+ if (g_test_sig != sig) {
+ printf("test_sigaction_sig(%d): Invalid g_test_sig value (%d != %d)\n", sig, g_test_sig, sig);
+ return -1;
+ }
+
+ /*
+ * Restore the original signal handler.
+ */
+ ret = sigaction(sig, &old, NULL);
+ if (ret) {
+ printf("test_sigaction_sig(%d): Failed to restore the signal handler\n", sig);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int test_signal_sig(int sig)
+{
+ sighandler_t old;
+
+ /*
+ * Set the signal handler.
+ */
+ old = signal(sig, test_signal_handler);
+ if (old == SIG_ERR) {
+ printf("test_signal_sig(%d): Failed to set a signal handler\n", sig);
+ return -1;
+ }
+
+ /*
+ * Test the signal handler.
+ */
+ g_test_sig = 0;
+ kill(getpid(), sig);
+
+ /*
+ * test_signal_handler() must set @g_test_sig to @sig.
+ */
+ if (g_test_sig != sig) {
+ printf("test_signal_sig(%d): Invalid g_test_sig value (%d != %d)\n", sig, g_test_sig, sig);
+ return -1;
+ }
+
+ /*
+ * Restore the original signal handler.
+ */
+ old = signal(sig, old);
+ if (old == SIG_ERR) {
+ printf("test_signal_sig(%d): Failed to restore the signal handler\n", sig);
+ return -1;
+ }
+
+ return 0;
+}
+
+static const int g_sig_to_test[] = {
+ SIGINT,
+ SIGHUP,
+ SIGTERM,
+ SIGQUIT,
+ SIGSEGV
+};
+
+static int test_sigaction(void)
+{
+ size_t i;
+ int ret;
+
+ for (i = 0; i < (sizeof(g_sig_to_test) / sizeof(g_sig_to_test[0])); i++) {
+ ret = test_sigaction_sig(g_sig_to_test[i]);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int test_signal(void)
+{
+ size_t i;
+ int ret;
+
+ for (i = 0; i < (sizeof(g_sig_to_test) / sizeof(g_sig_to_test[0])); i++) {
+ ret = test_signal_sig(g_sig_to_test[i]);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
/* Run syscall tests between IDs <min> and <max>.
* Return 0 on success, non-zero on failure.
*/
@@ -596,6 +721,8 @@ int run_syscall(int min, int max)
CASE_TEST(select_null); EXPECT_SYSZR(1, ({ struct timeval tv = { 0 }; select(0, NULL, NULL, NULL, &tv); })); break;
CASE_TEST(select_stdout); EXPECT_SYSNE(1, ({ fd_set fds; FD_ZERO(&fds); FD_SET(1, &fds); select(2, NULL, &fds, NULL, NULL); }), -1); break;
CASE_TEST(select_fault); EXPECT_SYSER(1, select(1, (void *)1, NULL, NULL, 0), -1, EFAULT); break;
+ CASE_TEST(sigaction); EXPECT_SYSZR(1, test_sigaction()); break;
+ CASE_TEST(signal); EXPECT_SYSZR(1, test_signal()); break;
CASE_TEST(stat_blah); EXPECT_SYSER(1, stat("/proc/self/blah", &stat_buf), -1, ENOENT); break;
CASE_TEST(stat_fault); EXPECT_SYSER(1, stat(NULL, &stat_buf), -1, EFAULT); break;
CASE_TEST(symlink_root); EXPECT_SYSER(1, symlink("/", "/"), -1, EEXIST); break;
--
Ammar Faizi