| /* |
| * Copyright (C) 2011, 2015 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS |
| * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
| * THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include <wtf/CheckedArithmetic.h> |
| |
| namespace TestWebKitAPI { |
| |
| class OverflowCrashLogger { |
| protected: |
| void overflowed() |
| { |
| m_overflowCount++; |
| } |
| |
| void clearOverflow() |
| { |
| m_overflowCount = 0; |
| } |
| |
| static void crash() |
| { |
| s_didCrash = true; |
| } |
| |
| public: |
| void reset() |
| { |
| m_overflowCount = 0; |
| s_didCrash = false; |
| } |
| |
| bool hasOverflowed() const { return m_overflowCount > 0; } |
| int overflowCount() const { return m_overflowCount; } |
| |
| bool didCrash() const { return s_didCrash; } |
| |
| private: |
| int m_overflowCount { 0 }; |
| static bool s_didCrash; |
| }; |
| |
| bool OverflowCrashLogger::s_didCrash = false; |
| |
| template <typename type> |
| static void resetOverflow(Checked<type, OverflowCrashLogger>& value) |
| { |
| value.reset(); |
| value = 100; |
| value *= std::numeric_limits<type>::max(); |
| } |
| |
| #define CheckedArithmeticTest(type, Coercer, MixedSignednessTester) \ |
| TEST(WTF, Checked_##type) \ |
| { \ |
| typedef Coercer<type> CoercerType; \ |
| typedef MixedSignednessTester<type, CoercerType> MixedSignednessTesterType; \ |
| CheckedArithmeticTester<type, CoercerType, MixedSignednessTesterType>::run(); \ |
| } |
| |
| #define coerceLiteral(x) Coercer::coerce(x) |
| |
| template <typename type, typename Coercer, typename MixedSignednessTester> |
| class CheckedArithmeticTester { |
| public: |
| static void run() |
| { |
| Checked<type, RecordOverflow> value; |
| EXPECT_EQ(coerceLiteral(0), value.unsafeGet()); |
| EXPECT_EQ(std::numeric_limits<type>::max(), (value + std::numeric_limits<type>::max()).unsafeGet()); |
| EXPECT_EQ(std::numeric_limits<type>::max(), (std::numeric_limits<type>::max() + value).unsafeGet()); |
| EXPECT_EQ(std::numeric_limits<type>::min(), (value + std::numeric_limits<type>::min()).unsafeGet()); |
| EXPECT_EQ(std::numeric_limits<type>::min(), (std::numeric_limits<type>::min() + value).unsafeGet()); |
| |
| EXPECT_EQ(coerceLiteral(0), (value * coerceLiteral(0)).unsafeGet()); |
| EXPECT_EQ(coerceLiteral(0), (coerceLiteral(0) * value).unsafeGet()); |
| EXPECT_EQ(coerceLiteral(0), (value * value).unsafeGet()); |
| EXPECT_EQ(coerceLiteral(0), (value - coerceLiteral(0)).unsafeGet()); |
| EXPECT_EQ(coerceLiteral(0), (coerceLiteral(0) - value).unsafeGet()); |
| EXPECT_EQ(coerceLiteral(0), (value - value).unsafeGet()); |
| EXPECT_EQ(coerceLiteral(0), (value++).unsafeGet()); |
| EXPECT_EQ(coerceLiteral(1), (value--).unsafeGet()); |
| EXPECT_EQ(coerceLiteral(1), (++value).unsafeGet()); |
| EXPECT_EQ(coerceLiteral(0), (--value).unsafeGet()); |
| EXPECT_EQ(coerceLiteral(10), (value += coerceLiteral(10)).unsafeGet()); |
| EXPECT_EQ(coerceLiteral(10), value.unsafeGet()); |
| EXPECT_EQ(coerceLiteral(100), (value *= coerceLiteral(10)).unsafeGet()); |
| EXPECT_EQ(coerceLiteral(100), value.unsafeGet()); |
| EXPECT_EQ(coerceLiteral(0), (value -= coerceLiteral(100)).unsafeGet()); |
| EXPECT_EQ(coerceLiteral(0), value.unsafeGet()); |
| value = 10; |
| EXPECT_EQ(coerceLiteral(10), value.unsafeGet()); |
| EXPECT_EQ(coerceLiteral(0), (value - coerceLiteral(10)).unsafeGet()); |
| EXPECT_EQ(coerceLiteral(10), value.unsafeGet()); |
| |
| value = std::numeric_limits<type>::min(); |
| EXPECT_EQ(true, (Checked<type, RecordOverflow>(value - coerceLiteral(1))).hasOverflowed()); |
| EXPECT_EQ(true, !((value--).hasOverflowed())); |
| EXPECT_EQ(true, value.hasOverflowed()); |
| value = std::numeric_limits<type>::max(); |
| EXPECT_EQ(true, !value.hasOverflowed()); |
| EXPECT_EQ(true, (Checked<type, RecordOverflow>(value + coerceLiteral(1))).hasOverflowed()); |
| EXPECT_EQ(true, !(value++).hasOverflowed()); |
| EXPECT_EQ(true, value.hasOverflowed()); |
| value = std::numeric_limits<type>::max(); |
| EXPECT_EQ(true, (value += coerceLiteral(1)).hasOverflowed()); |
| EXPECT_EQ(true, value.hasOverflowed()); |
| |
| value = 10; |
| type _value = 0; |
| EXPECT_EQ(true, CheckedState::DidNotOverflow == (value * Checked<type, RecordOverflow>(0)).safeGet(_value)); |
| _value = 0; |
| EXPECT_EQ(true, CheckedState::DidNotOverflow == (Checked<type, RecordOverflow>(0) * value).safeGet(_value)); |
| _value = 0; |
| EXPECT_EQ(true, CheckedState::DidOverflow == (value * Checked<type, RecordOverflow>(std::numeric_limits<type>::max())).safeGet(_value)); |
| _value = 0; |
| EXPECT_EQ(true, CheckedState::DidOverflow == (Checked<type, RecordOverflow>(std::numeric_limits<type>::max()) * value).safeGet(_value)); |
| value = 0; |
| _value = 0; |
| EXPECT_EQ(true, CheckedState::DidNotOverflow == (value * Checked<type, RecordOverflow>(std::numeric_limits<type>::max())).safeGet(_value)); |
| _value = 0; |
| EXPECT_EQ(true, CheckedState::DidNotOverflow == (Checked<type, RecordOverflow>(std::numeric_limits<type>::max()) * value).safeGet(_value)); |
| value = 1; |
| _value = 0; |
| EXPECT_EQ(true, CheckedState::DidNotOverflow == (value * Checked<type, RecordOverflow>(std::numeric_limits<type>::max())).safeGet(_value)); |
| _value = 0; |
| EXPECT_EQ(true, CheckedState::DidNotOverflow == (Checked<type, RecordOverflow>(std::numeric_limits<type>::max()) * value).safeGet(_value)); |
| _value = 0; |
| value = 0; |
| EXPECT_EQ(true, CheckedState::DidNotOverflow == (value * Checked<type, RecordOverflow>(std::numeric_limits<type>::max())).safeGet(_value)); |
| _value = 0; |
| EXPECT_EQ(true, CheckedState::DidNotOverflow == (Checked<type, RecordOverflow>(std::numeric_limits<type>::max()) * (type)0).safeGet(_value)); |
| _value = 0; |
| value = 1; |
| EXPECT_EQ(true, CheckedState::DidNotOverflow == (value * Checked<type, RecordOverflow>(std::numeric_limits<type>::max())).safeGet(_value)); |
| _value = 0; |
| EXPECT_EQ(true, CheckedState::DidNotOverflow == (Checked<type, RecordOverflow>(std::numeric_limits<type>::max()) * (type)1).safeGet(_value)); |
| _value = 0; |
| value = 2; |
| EXPECT_EQ(true, CheckedState::DidOverflow == (value * Checked<type, RecordOverflow>(std::numeric_limits<type>::max())).safeGet(_value)); |
| _value = 0; |
| EXPECT_EQ(true, CheckedState::DidOverflow == (Checked<type, RecordOverflow>(std::numeric_limits<type>::max()) * (type)2).safeGet(_value)); |
| value = 10; |
| EXPECT_EQ(true, (value * Checked<type, RecordOverflow>(std::numeric_limits<type>::max())).hasOverflowed()); |
| |
| |
| Checked<type, OverflowCrashLogger> nvalue; // to hold a not overflowed value. |
| Checked<type, OverflowCrashLogger> ovalue; // to hold an overflowed value. |
| |
| bool unused; |
| UNUSED_PARAM(unused); |
| |
| _value = 75; |
| type _largeValue = 100; |
| type _smallValue = 50; |
| |
| value = _smallValue; |
| nvalue = _value; |
| ovalue = _value; |
| |
| // Make sure the OverflowCrashLogger is working as expected. |
| EXPECT_EQ(false, (ovalue.hasOverflowed())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), ovalue.hasOverflowed())); |
| EXPECT_EQ(false, (resetOverflow(ovalue), ovalue.didCrash())); |
| EXPECT_EQ(true, (unused = (ovalue == ovalue), ovalue.didCrash())); |
| EXPECT_EQ(false, (resetOverflow(ovalue), ovalue.didCrash())); |
| |
| EXPECT_EQ(false, nvalue.hasOverflowed()); |
| EXPECT_EQ(false, nvalue.didCrash()); |
| |
| // Test operator== that should not overflow nor crash. |
| EXPECT_EQ(true, (nvalue == nvalue)); |
| EXPECT_EQ(true, (nvalue == Checked<type, OverflowCrashLogger>(_value))); |
| EXPECT_EQ(false, (nvalue == value)); |
| EXPECT_EQ(true, (nvalue == _value)); |
| EXPECT_EQ(false, (nvalue == Checked<type, OverflowCrashLogger>(std::numeric_limits<type>::max()))); |
| EXPECT_EQ(false, (nvalue == std::numeric_limits<type>::max())); |
| |
| EXPECT_EQ(false, nvalue.hasOverflowed()); |
| EXPECT_EQ(false, nvalue.didCrash()); |
| |
| // Test operator!= that should not overflow nor crash. |
| EXPECT_EQ(false, (nvalue != nvalue)); |
| EXPECT_EQ(false, (nvalue != Checked<type, OverflowCrashLogger>(_value))); |
| EXPECT_EQ(true, (nvalue != value)); |
| EXPECT_EQ(false, (nvalue != _value)); |
| EXPECT_EQ(true, (nvalue != Checked<type, OverflowCrashLogger>(std::numeric_limits<type>::max()))); |
| EXPECT_EQ(true, (nvalue != std::numeric_limits<type>::max())); |
| |
| EXPECT_EQ(false, nvalue.hasOverflowed()); |
| EXPECT_EQ(false, nvalue.didCrash()); |
| |
| // Test operator< that should not overflow nor crash. |
| EXPECT_EQ(false, (nvalue < nvalue)); |
| EXPECT_EQ(false, (nvalue < value)); |
| EXPECT_EQ(true, (nvalue < Checked<type, OverflowCrashLogger>(_largeValue))); |
| EXPECT_EQ(false, (nvalue < Checked<type, OverflowCrashLogger>(_value))); |
| EXPECT_EQ(false, (nvalue < Checked<type, OverflowCrashLogger>(_smallValue))); |
| EXPECT_EQ(true, (nvalue < _largeValue)); |
| EXPECT_EQ(false, (nvalue < _value)); |
| EXPECT_EQ(false, (nvalue < _smallValue)); |
| EXPECT_EQ(true, (nvalue < Checked<type, OverflowCrashLogger>(std::numeric_limits<type>::max()))); |
| EXPECT_EQ(true, (nvalue < std::numeric_limits<type>::max())); |
| |
| EXPECT_EQ(false, nvalue.hasOverflowed()); |
| EXPECT_EQ(false, nvalue.didCrash()); |
| |
| // Test operator<= that should not overflow nor crash. |
| EXPECT_EQ(true, (nvalue <= nvalue)); |
| EXPECT_EQ(false, (nvalue <= value)); |
| EXPECT_EQ(true, (nvalue <= Checked<type, OverflowCrashLogger>(_largeValue))); |
| EXPECT_EQ(true, (nvalue <= Checked<type, OverflowCrashLogger>(_value))); |
| EXPECT_EQ(false, (nvalue <= Checked<type, OverflowCrashLogger>(_smallValue))); |
| EXPECT_EQ(true, (nvalue <= _largeValue)); |
| EXPECT_EQ(true, (nvalue <= _value)); |
| EXPECT_EQ(false, (nvalue <= _smallValue)); |
| EXPECT_EQ(true, (nvalue <= Checked<type, OverflowCrashLogger>(std::numeric_limits<type>::max()))); |
| EXPECT_EQ(true, (nvalue <= std::numeric_limits<type>::max())); |
| |
| EXPECT_EQ(false, nvalue.hasOverflowed()); |
| EXPECT_EQ(false, nvalue.didCrash()); |
| |
| // Test operator> that should not overflow nor crash. |
| EXPECT_EQ(false, (nvalue > nvalue)); |
| EXPECT_EQ(true, (nvalue > value)); |
| EXPECT_EQ(false, (nvalue > Checked<type, OverflowCrashLogger>(_largeValue))); |
| EXPECT_EQ(false, (nvalue > Checked<type, OverflowCrashLogger>(_value))); |
| EXPECT_EQ(true, (nvalue > Checked<type, OverflowCrashLogger>(_smallValue))); |
| EXPECT_EQ(false, (nvalue > _largeValue)); |
| EXPECT_EQ(false, (nvalue > _value)); |
| EXPECT_EQ(true, (nvalue > _smallValue)); |
| EXPECT_EQ(false, (nvalue > Checked<type, OverflowCrashLogger>(std::numeric_limits<type>::max()))); |
| EXPECT_EQ(false, (nvalue > std::numeric_limits<type>::max())); |
| |
| EXPECT_EQ(false, nvalue.hasOverflowed()); |
| EXPECT_EQ(false, nvalue.didCrash()); |
| |
| // Test operator>= that should not overflow nor crash. |
| EXPECT_EQ(true, (nvalue >= nvalue)); |
| EXPECT_EQ(true, (nvalue >= value)); |
| EXPECT_EQ(false, (nvalue >= Checked<type, OverflowCrashLogger>(_largeValue))); |
| EXPECT_EQ(true, (nvalue >= Checked<type, OverflowCrashLogger>(_value))); |
| EXPECT_EQ(true, (nvalue >= Checked<type, OverflowCrashLogger>(_smallValue))); |
| EXPECT_EQ(false, (nvalue >= _largeValue)); |
| EXPECT_EQ(true, (nvalue >= _value)); |
| EXPECT_EQ(true, (nvalue >= _smallValue)); |
| EXPECT_EQ(false, (nvalue >= Checked<type, OverflowCrashLogger>(std::numeric_limits<type>::max()))); |
| EXPECT_EQ(false, (nvalue >= std::numeric_limits<type>::max())); |
| |
| EXPECT_EQ(false, nvalue.hasOverflowed()); |
| EXPECT_EQ(false, nvalue.didCrash()); |
| |
| // Test operator== with an overflowed value. |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue == ovalue), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue == Checked<type, OverflowCrashLogger>(_value)), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue == value), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue == _value), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue == _value * std::numeric_limits<type>::max()), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue == Checked<type, OverflowCrashLogger>(std::numeric_limits<type>::max())), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue == std::numeric_limits<type>::max()), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue == nvalue), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (nvalue == ovalue), ovalue.didCrash())); |
| |
| EXPECT_EQ(false, nvalue.hasOverflowed()); |
| |
| // Test operator!= with an overflowed value. |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue != ovalue), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue != Checked<type, OverflowCrashLogger>(_value)), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue != value), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue != _value), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue != _value * std::numeric_limits<type>::max()), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue != Checked<type, OverflowCrashLogger>(std::numeric_limits<type>::max())), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue != std::numeric_limits<type>::max()), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue != nvalue), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (nvalue != ovalue), ovalue.didCrash())); |
| |
| EXPECT_EQ(false, nvalue.hasOverflowed()); |
| |
| // Test operator< with an overflowed value. |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue < ovalue), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue < value), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue < Checked<type, OverflowCrashLogger>(_largeValue)), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue < Checked<type, OverflowCrashLogger>(_value)), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue < Checked<type, OverflowCrashLogger>(_smallValue)), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue < _largeValue), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue < _value), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue < _smallValue), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue < Checked<type, OverflowCrashLogger>(std::numeric_limits<type>::max())), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue < std::numeric_limits<type>::max()), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue < nvalue), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (nvalue < ovalue), ovalue.didCrash())); |
| |
| EXPECT_EQ(false, nvalue.hasOverflowed()); |
| |
| // Test operator<= with an overflowed value. |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue <= ovalue), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue <= value), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue <= Checked<type, OverflowCrashLogger>(_largeValue)), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue <= Checked<type, OverflowCrashLogger>(_value)), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue <= Checked<type, OverflowCrashLogger>(_smallValue)), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue <= _largeValue), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue <= _value), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue <= _smallValue), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue <= Checked<type, OverflowCrashLogger>(std::numeric_limits<type>::max())), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue <= std::numeric_limits<type>::max()), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue <= nvalue), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (nvalue <= ovalue), ovalue.didCrash())); |
| |
| EXPECT_EQ(false, nvalue.hasOverflowed()); |
| |
| // Test operator> with an overflowed value. |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue > ovalue), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue > value), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue > Checked<type, OverflowCrashLogger>(_largeValue)), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue > Checked<type, OverflowCrashLogger>(_value)), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue > Checked<type, OverflowCrashLogger>(_smallValue)), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue > _largeValue), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue > _value), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue > _smallValue), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue > Checked<type, OverflowCrashLogger>(std::numeric_limits<type>::max())), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue > std::numeric_limits<type>::max()), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue > nvalue), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (nvalue > ovalue), ovalue.didCrash())); |
| |
| EXPECT_EQ(false, nvalue.hasOverflowed()); |
| |
| // Test operator>= with an overflowed value. |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue >= ovalue), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue >= value), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue >= Checked<type, OverflowCrashLogger>(_largeValue)), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue >= Checked<type, OverflowCrashLogger>(_value)), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue >= Checked<type, OverflowCrashLogger>(_smallValue)), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue >= _largeValue), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue >= _value), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue >= _smallValue), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue >= Checked<type, OverflowCrashLogger>(std::numeric_limits<type>::max())), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue >= std::numeric_limits<type>::max()), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (ovalue >= nvalue), ovalue.didCrash())); |
| EXPECT_EQ(true, (resetOverflow(ovalue), unused = (nvalue >= ovalue), ovalue.didCrash())); |
| |
| EXPECT_EQ(false, nvalue.hasOverflowed()); |
| |
| MixedSignednessTester::run(); |
| } |
| }; |
| |
| template <typename type, typename Coercer> |
| class AllowMixedSignednessTest { |
| public: |
| static void run() |
| { |
| Checked<type, RecordOverflow> value; |
| value = 10; |
| |
| EXPECT_EQ(coerceLiteral(0), (value + -10).unsafeGet()); |
| EXPECT_EQ(0U, (value - 10U).unsafeGet()); |
| EXPECT_EQ(coerceLiteral(0), (-10 + value).unsafeGet()); |
| EXPECT_EQ(0U, (10U - value).unsafeGet()); |
| value = std::numeric_limits<type>::min(); |
| EXPECT_EQ(true, (Checked<type, RecordOverflow>(value - 1)).hasOverflowed()); |
| EXPECT_EQ(true, !(value--).hasOverflowed()); |
| EXPECT_EQ(true, value.hasOverflowed()); |
| value = std::numeric_limits<type>::max(); |
| EXPECT_EQ(true, !value.hasOverflowed()); |
| EXPECT_EQ(true, (Checked<type, RecordOverflow>(value + 1)).hasOverflowed()); |
| EXPECT_EQ(true, !(value++).hasOverflowed()); |
| EXPECT_EQ(true, value.hasOverflowed()); |
| value = std::numeric_limits<type>::max(); |
| EXPECT_EQ(true, (value += 1).hasOverflowed()); |
| EXPECT_EQ(true, value.hasOverflowed()); |
| value = std::numeric_limits<type>::min(); |
| EXPECT_EQ(true, (value - 1U).hasOverflowed()); |
| EXPECT_EQ(true, !(value--).hasOverflowed()); |
| EXPECT_EQ(true, value.hasOverflowed()); |
| value = std::numeric_limits<type>::max(); |
| EXPECT_EQ(true, !value.hasOverflowed()); |
| EXPECT_EQ(true, (Checked<type, RecordOverflow>(value + 1U)).hasOverflowed()); |
| EXPECT_EQ(true, !(value++).hasOverflowed()); |
| EXPECT_EQ(true, value.hasOverflowed()); |
| value = std::numeric_limits<type>::max(); |
| EXPECT_EQ(true, (value += 1U).hasOverflowed()); |
| EXPECT_EQ(true, value.hasOverflowed()); |
| } |
| }; |
| |
| template <typename type, typename Coercer> |
| class IgnoreMixedSignednessTest { |
| public: |
| static void run() { } |
| }; |
| |
| template <typename type> class CoerceLiteralToUnsigned { |
| public: |
| static unsigned coerce(type x) { return static_cast<unsigned>(x); } |
| }; |
| |
| template <typename type> class CoerceLiteralNop { |
| public: |
| static type coerce(type x) { return x; } |
| }; |
| |
| CheckedArithmeticTest(int8_t, CoerceLiteralNop, IgnoreMixedSignednessTest) |
| CheckedArithmeticTest(int16_t, CoerceLiteralNop, IgnoreMixedSignednessTest) |
| CheckedArithmeticTest(int32_t, CoerceLiteralNop, AllowMixedSignednessTest) |
| CheckedArithmeticTest(uint32_t, CoerceLiteralToUnsigned, AllowMixedSignednessTest) |
| CheckedArithmeticTest(int64_t, CoerceLiteralNop, IgnoreMixedSignednessTest) |
| CheckedArithmeticTest(uint64_t, CoerceLiteralToUnsigned, IgnoreMixedSignednessTest) |
| |
| TEST(CheckedArithmeticTest, IsInBounds) |
| { |
| // bigger precision, signed, signed |
| EXPECT_TRUE(isInBounds<int32_t>(std::numeric_limits<int16_t>::max())); |
| EXPECT_TRUE(isInBounds<int32_t>(std::numeric_limits<int16_t>::min())); |
| |
| // bigger precision, unsigned, signed |
| EXPECT_TRUE(isInBounds<uint32_t>(std::numeric_limits<int32_t>::max())); |
| EXPECT_FALSE(isInBounds<uint32_t>(std::numeric_limits<int16_t>::min())); |
| |
| EXPECT_FALSE(isInBounds<uint32_t>((int32_t)-1)); |
| EXPECT_FALSE(isInBounds<uint16_t>((int32_t)-1)); |
| EXPECT_FALSE(isInBounds<unsigned long>((int)-1)); |
| |
| EXPECT_TRUE(isInBounds<uint32_t>((int32_t)1)); |
| EXPECT_TRUE(isInBounds<uint32_t>((int16_t)1)); |
| EXPECT_TRUE(isInBounds<unsigned>((int)1)); |
| |
| EXPECT_TRUE(isInBounds<uint32_t>((int32_t)0)); |
| EXPECT_TRUE(isInBounds<uint16_t>((int32_t)0)); |
| EXPECT_TRUE(isInBounds<uint32_t>((int16_t)0)); |
| EXPECT_TRUE(isInBounds<unsigned>((int)0)); |
| |
| EXPECT_TRUE(isInBounds<uint32_t>(std::numeric_limits<int32_t>::max())); |
| EXPECT_TRUE(isInBounds<uint32_t>(std::numeric_limits<int16_t>::max())); |
| EXPECT_TRUE(isInBounds<unsigned>(std::numeric_limits<int>::max())); |
| |
| // bigger precision, signed, unsigned |
| EXPECT_TRUE(isInBounds<int32_t>(std::numeric_limits<uint16_t>::max())); |
| EXPECT_FALSE(isInBounds<int32_t>(std::numeric_limits<uint32_t>::max())); |
| EXPECT_TRUE(isInBounds<int32_t>((uint32_t)0)); |
| |
| // bigger precision, unsigned, unsigned |
| EXPECT_TRUE(isInBounds<uint32_t>(std::numeric_limits<uint16_t>::max())); |
| EXPECT_TRUE(isInBounds<uint32_t>(std::numeric_limits<uint16_t>::min())); |
| |
| // lower precision, signed signed |
| EXPECT_FALSE(isInBounds<int16_t>(std::numeric_limits<int32_t>::max())); |
| EXPECT_FALSE(isInBounds<int16_t>(std::numeric_limits<int32_t>::min())); |
| EXPECT_TRUE(isInBounds<int16_t>((int32_t)-1)); |
| EXPECT_TRUE(isInBounds<int16_t>((int32_t)0)); |
| EXPECT_TRUE(isInBounds<int16_t>((int32_t)1)); |
| // lower precision, unsigned, signed |
| EXPECT_FALSE(isInBounds<uint16_t>(std::numeric_limits<int32_t>::max())); |
| EXPECT_FALSE(isInBounds<uint16_t>(std::numeric_limits<int32_t>::min())); |
| EXPECT_FALSE(isInBounds<uint16_t>((int32_t)-1)); |
| EXPECT_TRUE(isInBounds<uint16_t>((int32_t)0)); |
| EXPECT_TRUE(isInBounds<uint16_t>((int32_t)1)); |
| // lower precision, signed, unsigned |
| EXPECT_FALSE(isInBounds<int16_t>(std::numeric_limits<uint32_t>::max())); |
| EXPECT_TRUE(isInBounds<int16_t>((uint32_t)0)); |
| EXPECT_TRUE(isInBounds<int16_t>((uint32_t)1)); |
| // lower precision, unsigned, unsigned |
| EXPECT_FALSE(isInBounds<uint16_t>(std::numeric_limits<uint32_t>::max())); |
| EXPECT_TRUE(isInBounds<uint16_t>((uint32_t)0)); |
| EXPECT_TRUE(isInBounds<uint16_t>((uint32_t)1)); |
| } |
| |
| TEST(CheckedArithmeticTest, Division) |
| { |
| CheckedSize size = 100; |
| EXPECT_EQ(100U, size.unsafeGet()); |
| size /= 10U; |
| EXPECT_FALSE(size.hasOverflowed()); |
| EXPECT_EQ(10U, size.unsafeGet()); |
| |
| size /= 11U; |
| EXPECT_FALSE(size.hasOverflowed()); |
| EXPECT_EQ(0U, size.unsafeGet()); |
| |
| size = 100; |
| EXPECT_FALSE(size.hasOverflowed()); |
| |
| size /= 0U; |
| EXPECT_TRUE(size.hasOverflowed()); |
| |
| size = 100; |
| EXPECT_FALSE(size.hasOverflowed()); |
| EXPECT_EQ(100U, size.unsafeGet()); |
| |
| size /= 10.5; |
| EXPECT_FALSE(size.hasOverflowed()); |
| EXPECT_EQ(9U, size.unsafeGet()); |
| |
| size /= 0.0; |
| EXPECT_TRUE(size.hasOverflowed()); |
| } |
| |
| } // namespace TestWebKitAPI |
