// Copyright 2018 The gVisor Authors. // // 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; }