blob: 37b479f5558f67bf70dde9b092fafef7ce3e771a [file] [log] [blame]
//===-- 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 "src/fenv/feholdexcept.h"
#include "utils/FPUtil/FEnvUtils.h"
#include "utils/FPUtil/FPExceptMatcher.h"
#include "utils/UnitTest/Test.h"
#include <fenv.h>
TEST(LlvmLibcFEnvTest, RaiseAndCrash) {
int excepts[] = {FE_DIVBYZERO, FE_INVALID, FE_INEXACT, FE_OVERFLOW,
FE_UNDERFLOW};
for (int e : excepts) {
fenv_t env;
__llvm_libc::fputil::disableExcept(FE_ALL_EXCEPT);
__llvm_libc::fputil::enableExcept(e);
ASSERT_EQ(__llvm_libc::fputil::clearExcept(FE_ALL_EXCEPT), 0);
ASSERT_EQ(__llvm_libc::feholdexcept(&env), 0);
// feholdexcept should disable all excepts so raising an exception
// should not crash/invoke the exception handler.
ASSERT_EQ(__llvm_libc::fputil::raiseExcept(e), 0);
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.
__llvm_libc::fputil::setEnv(&env);
__llvm_libc::fputil::raiseExcept(e);
});
// Cleanup
__llvm_libc::fputil::disableExcept(FE_ALL_EXCEPT);
ASSERT_EQ(__llvm_libc::fputil::clearExcept(FE_ALL_EXCEPT), 0);
}
}