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| author | chriseth <chris@ethereum.org> | 2016-08-17 22:43:13 +0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2016-08-17 22:43:13 +0800 |
| commit | d6579a0a5f99425eae95329b77e07ea072122924 (patch) | |
| tree | 210f3cf17b58c674060d834c6ae2dfe3ec3cd17a /libsolidity | |
| parent | 6baa982a6a95189af8199e719e62314b1073aa62 (diff) | |
| parent | 34f9a59f18dcf8601d910aef599b2589dc080e2d (diff) | |
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Merge pull request #888 from chriseth/throwOnDivZero
Throw on division by zero.
Diffstat (limited to 'libsolidity')
| -rw-r--r-- | libsolidity/codegen/ExpressionCompiler.cpp | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/libsolidity/codegen/ExpressionCompiler.cpp b/libsolidity/codegen/ExpressionCompiler.cpp index 1f93cf8c..4695ff96 100644 --- a/libsolidity/codegen/ExpressionCompiler.cpp +++ b/libsolidity/codegen/ExpressionCompiler.cpp @@ -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; |