| //========- unittests/Support/SignalsTest.cpp - Signal handling test =========// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #if !defined(_WIN32) |
| #include <unistd.h> |
| #include <sysexits.h> |
| #endif // !defined(_WIN32) |
| |
| #include "llvm/Support/Signals.h" |
| |
| #include "gtest/gtest.h" |
| |
| using namespace llvm; |
| |
| #if !defined(_WIN32) |
| TEST(SignalTest, IgnoreMultipleSIGPIPEs) { |
| // Ignore SIGPIPE. |
| signal(SIGPIPE, SIG_IGN); |
| |
| // Disable exit-on-SIGPIPE. |
| sys::SetPipeSignalFunction(nullptr); |
| |
| // Create unidirectional read/write pipes. |
| int fds[2]; |
| int err = pipe(fds); |
| if (err != 0) |
| return; // If we can't make pipes, this isn't testing anything. |
| |
| // Close the read pipe. |
| close(fds[0]); |
| |
| // Attempt to write to the write pipe. Currently we're asserting that the |
| // write fails, which isn't great. |
| // |
| // What we really want is a death test that checks that this block exits |
| // with a special exit "success" code, as opposed to unexpectedly exiting due |
| // to a kill-by-SIGNAL or due to the default SIGPIPE handler. |
| // |
| // Unfortunately llvm's unit tests aren't set up to support death tests well. |
| // For one, death tests are flaky in a multithreaded context. And sigactions |
| // inherited from llvm-lit interfere with what's being tested. |
| const void *buf = (const void *)&fds; |
| err = write(fds[1], buf, 1); |
| ASSERT_EQ(err, -1); |
| err = write(fds[1], buf, 1); |
| ASSERT_EQ(err, -1); |
| } |
| #endif // !defined(_WIN32) |