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//===-- Unittests for feraiseexcept with exceptions enabled ---------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#include "src/fenv/feclearexcept.h"
#include "src/fenv/feraiseexcept.h"
#include "src/fenv/fetestexcept.h"
#include "src/__support/FPUtil/FEnvImpl.h"
#include "src/__support/macros/properties/architectures.h"
#include "test/UnitTest/FEnvSafeTest.h"
#include "test/UnitTest/FPExceptMatcher.h"
#include "test/UnitTest/Test.h"
#include "hdr/fenv_macros.h"
#include <signal.h>
#include "excepts.h"
using LlvmLibcExceptionStatusTest = LIBC_NAMESPACE::testing::FEnvSafeTest;
// This test enables an exception and verifies that raising that exception
// triggers SIGFPE.
TEST_F(LlvmLibcExceptionStatusTest, RaiseAndCrash) {
// TODO: Install a floating point exception handler and verify that the
// the expected exception was raised. One will have to longjmp back from
// that exception handler, so such a testing can be done after we have
// longjmp implemented.
for (int e : EXCEPTS) {
LIBC_NAMESPACE::fputil::disable_except(FE_ALL_EXCEPT);
LIBC_NAMESPACE::fputil::enable_except(e);
ASSERT_EQ(LIBC_NAMESPACE::feclearexcept(FE_ALL_EXCEPT), 0);
// Raising all exceptions except |e| should not call the
// SIGFPE handler. They should set the exception flag though,
// so we verify that. Since other exceptions like FE_DIVBYZERO
// can raise FE_INEXACT as well, we don't verify the other
// exception flags when FE_INEXACT is enabled.
if (e != FE_INEXACT) {
int others = ALL_EXCEPTS & ~e;
ASSERT_EQ(LIBC_NAMESPACE::feraiseexcept(others), 0);
ASSERT_EQ(LIBC_NAMESPACE::fetestexcept(others), others);
}
#if defined(LIBC_TRAP_ON_RAISE_FP_EXCEPT) && defined(__SSE__)
ASSERT_RAISES_FP_EXCEPT([=] {
// In test frameworks like Fuchsia's zxtest, this translates to
// a death test which runs this closure in a different thread. So,
// we enable the exception again inside this closure so that the
// exception gets enabled for the thread running this closure.
LIBC_NAMESPACE::fputil::enable_except(e);
LIBC_NAMESPACE::feraiseexcept(e);
});
#endif // LIBC_TRAP_ON_RAISE_FP_EXCEPT
// Cleanup.
LIBC_NAMESPACE::fputil::disable_except(FE_ALL_EXCEPT);
ASSERT_EQ(LIBC_NAMESPACE::feclearexcept(FE_ALL_EXCEPT), 0);
}
}
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