Open source system call tests.

PiperOrigin-RevId: 224886231
Change-Id: I0fccb4d994601739d8b16b1d4e6b31f40297fb22

1 files changed, 33 insertions, 0 deletions

diff --git a/test/syscalls/linux/sigaltstack_check.cc b/test/syscalls/linux/sigaltstack_check.cc
new file mode 100644
index 000000000..b71f812a8
--- /dev/null
+++ b/test/syscalls/linux/sigaltstack_check.cc
@@ -0,0 +1,33 @@
+// Copyright 2018 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Checks that there is no alternate signal stack by default.
+//
+// Used by a test in sigaltstack.cc.
+#include <errno.h>
+#include <signal.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "test/util/logging.h"
+
+int main(int /* argc */, char** /* argv */) {
+  stack_t stack;
+  TEST_CHECK(sigaltstack(nullptr, &stack) >= 0);
+  TEST_CHECK(stack.ss_flags == SS_DISABLE);
+  TEST_CHECK(stack.ss_sp == 0);
+  TEST_CHECK(stack.ss_size == 0);
+  return 0;
+}