3fb3939896
This CL adds a simple tool that let a unit test fail if a floating point exception occurs. It is possible to focus on specific exceptions. Note that FloatingPointExceptionObserver is only effective in debug mode. For this reason, the related unit tests only run in debug mode. Plus, due to some platform-specific limitations, not all the floating point exceptions are available on Android. Bug: webrtc:8948 Change-Id: I0956e27f2f3aa68771dd647169fba7968ccbd771 Reviewed-on: https://webrtc-review.googlesource.com/58097 Commit-Queue: Alessio Bazzica <alessiob@webrtc.org> Reviewed-by: Patrik Höglund <phoglund@webrtc.org> Cr-Commit-Position: refs/heads/master@{#22768}
61 lines
1.8 KiB
C++
61 lines
1.8 KiB
C++
/*
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* Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef TEST_FPE_OBSERVER_H_
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#define TEST_FPE_OBSERVER_H_
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#include <cfenv>
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#include "test/gtest.h"
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namespace webrtc {
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namespace test {
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// Class that let a unit test fail if floating point exceptions are signaled.
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// Usage:
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// {
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// FloatingPointExceptionObserver fpe_observer;
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// ...
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// }
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class FloatingPointExceptionObserver {
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public:
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FloatingPointExceptionObserver(int mask = FE_DIVBYZERO | FE_INVALID |
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FE_OVERFLOW | FE_UNDERFLOW)
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: mask_(mask) {
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#ifdef NDEBUG
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EXPECT_LE(0, mask_); // Avoid compile time errors in release mode.
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#else
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EXPECT_EQ(0, std::feclearexcept(mask_));
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#endif
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}
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~FloatingPointExceptionObserver() {
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#ifndef NDEBUG
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const int occurred = std::fetestexcept(mask_);
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EXPECT_FALSE(occurred & FE_INVALID)
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<< "Domain error occurred in a floating-point operation.";
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EXPECT_FALSE(occurred & FE_DIVBYZERO) << "Division by zero.";
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EXPECT_FALSE(occurred & FE_OVERFLOW)
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<< "The result of a floating-point operation was too large.";
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EXPECT_FALSE(occurred & FE_UNDERFLOW)
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<< "The result of a floating-point operation was subnormal with a loss "
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<< "of precision.";
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EXPECT_FALSE(occurred & FE_INEXACT)
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<< "Inexact result: rounding during a floating-point operation.";
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#endif
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}
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private:
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const int mask_;
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};
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} // namespace test
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} // namespace webrtc
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#endif // TEST_FPE_OBSERVER_H_
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