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Merge pull request #888 from chriseth/throwOnDivZero

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Throw on division by zero.
This commit is contained in:
chriseth
2016-08-17 16:43:13 +02:00
committed by GitHub
parent 6baa982a6a 34f9a59f18
commit d6579a0a5f
4 changed files with 41 additions and 3 deletions
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libsolidity/codegen/ExpressionCompiler.cpp
+10 -3
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@@ -1324,11 +1324,18 @@ void ExpressionCompiler::appendArithmeticOperatorCode(Token::Value _operator, Ty
m_context << Instruction::MUL;
break;
case Token::Div:
m_context << (c_isSigned ? Instruction::SDIV : Instruction::DIV);
break;
case Token::Mod:
m_context << (c_isSigned ? Instruction::SMOD : Instruction::MOD);
{
// Test for division by zero
m_context << Instruction::DUP2 << Instruction::ISZERO;
m_context.appendConditionalJumpTo(m_context.errorTag());
if (_operator == Token::Div)
m_context << (c_isSigned ? Instruction::SDIV : Instruction::DIV);
else
m_context << (c_isSigned ? Instruction::SMOD : Instruction::MOD);
break;
}
case Token::Exp:
m_context << Instruction::EXP;
break;