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//===-- Unittests for feholdexcept 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 "hdr/types/fenv_t.h"
#include "src/fenv/feholdexcept.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 "excepts.h"
using LlvmLibcFEnvTest = LIBC_NAMESPACE::testing::FEnvSafeTest;
TEST_F(LlvmLibcFEnvTest, RaiseAndCrash) {
int excepts[] = {FE_DIVBYZERO, FE_INVALID, FE_INEXACT, FE_OVERFLOW,
FE_UNDERFLOW};
for (int e : excepts) {
fenv_t env;
LIBC_NAMESPACE::fputil::disable_except(FE_ALL_EXCEPT);
LIBC_NAMESPACE::fputil::enable_except(e);
ASSERT_EQ(LIBC_NAMESPACE::fputil::clear_except(FE_ALL_EXCEPT), 0);
ASSERT_EQ(LIBC_NAMESPACE::feholdexcept(&env), 0);
// feholdexcept should disable all excepts so raising an exception
// should not crash/invoke the exception handler.
ASSERT_EQ(LIBC_NAMESPACE::fputil::raise_except(e), 0);
#if defined(LIBC_TRAP_ON_RAISE_FP_EXCEPT) && defined(__SSE__)
ASSERT_RAISES_FP_EXCEPT([=] {
// When we put back the saved env, which has the exception enabled, it
// should crash with SIGFPE. Note that we set the old environment
// back inside this closure because in some test frameworks like Fuchsia's
// zxtest, this test translates to a death test in which this closure is
// run in a different thread. So, we set the old environment inside
// this closure so that the exception gets enabled for the thread running
// this closure.
LIBC_NAMESPACE::fputil::set_env(&env);
LIBC_NAMESPACE::fputil::raise_except(e);
});
#endif // LIBC_TRAP_ON_RAISE_FP_EXCEPT
// Cleanup
LIBC_NAMESPACE::fputil::disable_except(FE_ALL_EXCEPT);
ASSERT_EQ(LIBC_NAMESPACE::fputil::clear_except(FE_ALL_EXCEPT), 0);
}
}
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