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