From: Ammar Faizi ammarfaizi2@gnuweeb.org
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 ammarfaizi2@gnuweeb.org --- 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;