Add tests for signal functions in os_calls.c

tests/common/test_os_calls_signals.c

@@ -0,0 +1,251 @@
+
+#if defined(HAVE_CONFIG_H)
+#include "config_ac.h"
+#endif
+
+#include <signal.h>
+
+#include "os_calls.h"
+
+#include "test_common.h"
+
+static tintptr g_wobj1 = 0;
+
+/******************************************************************************/
+void
+os_calls_signals_init(void)
+{
+    g_wobj1 = g_create_wait_obj("");
+}
+
+/******************************************************************************/
+void
+os_calls_signals_deinit(void)
+{
+    g_delete_wait_obj(g_wobj1);
+    g_wobj1 = 0;
+}
+
+/******************************************************************************/
+/**
+ * Set the global wait object g_wobj1
+ */
+static void
+set_wobj1(int signum)
+{
+    g_set_wait_obj(g_wobj1);
+}
+
+/******************************************************************************/
+/**
+ * Sends a number of signals to the process and checks they are all delivered
+ *
+ * @param sig Signal number
+ * @param count Number of signals to send
+ *
+ * The caller is expected to establish a signal handler before this call
+ * which sets the global g_wobj1 on signal delivery */
+
+static
+void send_multiple_signals(int sig, unsigned int count)
+{
+    while (count-- > 0)
+    {
+        g_reset_wait_obj(g_wobj1);
+        ck_assert_int_eq(g_is_wait_obj_set(g_wobj1), 0);
+        // Expect the signal to be delivered synchronously
+        raise(sig);
+        ck_assert_int_ne(g_is_wait_obj_set(g_wobj1), 0);
+    }
+}
+
+/******************************************************************************/
+START_TEST(test_g_set_alarm)
+{
+    g_reset_wait_obj(g_wobj1);
+    ck_assert_int_eq(g_is_wait_obj_set(g_wobj1), 0);
+
+    g_set_alarm(set_wobj1, 1);
+
+    g_obj_wait(&g_wobj1, 1, NULL, 0, 2000);
+
+    ck_assert_int_ne(g_is_wait_obj_set(g_wobj1), 0);
+
+    // Clean up
+    g_set_alarm(NULL, 0);
+}
+END_TEST
+
+/******************************************************************************/
+START_TEST(test_g_signal_child_stop_1)
+{
+    struct exit_status e;
+
+    g_reset_wait_obj(g_wobj1);
+    ck_assert_int_eq(g_is_wait_obj_set(g_wobj1), 0);
+
+    g_signal_child_stop(set_wobj1);
+
+    int pid = g_fork();
+
+    if (pid == 0)
+    {
+        g_exit(45);
+    }
+    ck_assert_int_ne(pid, 0);
+    g_obj_wait(&g_wobj1, 1, NULL, 0, 2000);
+    ck_assert_int_ne(g_is_wait_obj_set(g_wobj1), 0);
+
+    e = g_waitpid_status(pid);
+
+    ck_assert_int_eq(e.reason, E_XR_STATUS_CODE);
+    ck_assert_int_eq(e.val, 45);
+
+    // Try another one to make sure the signal handler is still in place.
+    // This one can generate a signal
+    g_reset_wait_obj(g_wobj1);
+
+    pid = g_fork();
+    if (pid == 0)
+    {
+        raise(SIGSEGV);
+    }
+    ck_assert_int_ne(pid, 0);
+    g_obj_wait(&g_wobj1, 1, NULL, 0, 2000);
+    ck_assert_int_ne(g_is_wait_obj_set(g_wobj1), 0);
+
+    e = g_waitpid_status(pid);
+
+    ck_assert_int_eq(e.reason, E_XR_SIGNAL);
+    ck_assert_int_eq(e.val, SIGSEGV);
+
+    // Clean up
+    g_signal_child_stop(NULL);
+}
+END_TEST
+
+/******************************************************************************/
+/* Checks that multiple children finishing do not interrupt
+ * g_waitpid_status() */
+START_TEST(test_g_signal_child_stop_2)
+{
+#define CHILD_COUNT 20
+    int pids[CHILD_COUNT];
+    unsigned int i;
+
+    struct exit_status e;
+
+    g_reset_wait_obj(g_wobj1);
+    ck_assert_int_eq(g_is_wait_obj_set(g_wobj1), 0);
+
+    g_signal_child_stop(set_wobj1);
+
+    for (i = 0 ; i < CHILD_COUNT; ++i)
+    {
+        int pid = g_fork();
+        if (pid == 0)
+        {
+            g_sleep((i + 1) * 100);
+            g_exit(i + 1);
+        }
+        ck_assert_int_ne(pid, 0);
+        pids[i] = pid;
+    }
+    g_obj_wait(&g_wobj1, 1, NULL, 0, 2000);
+    ck_assert_int_ne(g_is_wait_obj_set(g_wobj1), 0);
+
+    for (i = 0 ; i < CHILD_COUNT; ++i)
+    {
+        e = g_waitpid_status(pids[i]);
+        ck_assert_int_eq(e.reason, E_XR_STATUS_CODE);
+        ck_assert_int_eq(e.val, (i + 1));
+    }
+
+    // Clean up
+    g_signal_child_stop(NULL);
+#undef CHILD_COUNT
+}
+END_TEST
+
+
+/******************************************************************************/
+START_TEST(test_g_signal_segfault)
+{
+    g_signal_segfault(set_wobj1);
+
+    // Only one signal can be received in this way. After handling
+    // the signal the handler should be automatically reset.
+    send_multiple_signals(SIGSEGV, 1);
+
+    g_signal_segfault(NULL);
+}
+END_TEST
+
+/******************************************************************************/
+START_TEST(test_g_signal_hang_up)
+{
+    g_signal_hang_up(set_wobj1);
+
+    send_multiple_signals(SIGHUP, 5);
+
+    g_signal_hang_up(NULL);
+}
+
+/******************************************************************************/
+START_TEST(test_g_signal_user_interrupt)
+{
+    g_signal_user_interrupt(set_wobj1);
+
+    send_multiple_signals(SIGINT, 5);
+
+    g_signal_user_interrupt(NULL);
+}
+
+/******************************************************************************/
+START_TEST(test_g_signal_terminate)
+{
+    g_signal_terminate(set_wobj1);
+
+    send_multiple_signals(SIGTERM, 5);
+
+    g_signal_terminate(NULL);
+}
+
+/******************************************************************************/
+START_TEST(test_g_signal_pipe)
+{
+    g_signal_pipe(set_wobj1);
+
+    send_multiple_signals(SIGPIPE, 5);
+
+    g_signal_pipe(NULL);
+}
+
+/******************************************************************************/
+START_TEST(test_g_signal_usr1)
+{
+    g_signal_usr1(set_wobj1);
+
+    send_multiple_signals(SIGUSR1, 5);
+
+    g_signal_usr1(NULL);
+}
+
+/******************************************************************************/
+TCase *
+make_tcase_test_os_calls_signals(void)
+{
+    TCase *tc = tcase_create("oscalls-signals");
+
+    tcase_add_test(tc, test_g_set_alarm);
+    tcase_add_test(tc, test_g_signal_child_stop_1);
+    tcase_add_test(tc, test_g_signal_child_stop_2);
+    tcase_add_test(tc, test_g_signal_segfault);
+    tcase_add_test(tc, test_g_signal_hang_up);
+    tcase_add_test(tc, test_g_signal_user_interrupt);
+    tcase_add_test(tc, test_g_signal_terminate);
+    tcase_add_test(tc, test_g_signal_pipe);
+    tcase_add_test(tc, test_g_signal_usr1);
+
+    return tc;
+}