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Copy only expected arguments for constructor if statically sized.

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This commit is contained in:
chriseth 2015-06-24 00:23:10 +02:00
parent fd1a01bbce
commit 2d169748b7
1 changed files with 19 additions and 3 deletions
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16
Compiler.cpp
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@ -165,10 +165,26 @@ void Compiler::appendConstructor(FunctionDefinition const& _constructor)
// copy constructor arguments from code to memory and then to stack, they are supplied after the actual program
if (!_constructor.getParameters().empty())
{
unsigned argumentSize = 0;
for (ASTPointer<VariableDeclaration> const& var: _constructor.getParameters())
if (var->getType()->isDynamicallySized())
{
argumentSize = 0;
break;
}
else
argumentSize += var->getType()->getCalldataEncodedSize();
CompilerUtils(m_context).fetchFreeMemoryPointer();
if (argumentSize == 0)
{
// argument size is dynamic, use CODESIZE to determine it
m_context.appendProgramSize(); // program itself
// CODESIZE is program plus manually added arguments
m_context << eth::Instruction::CODESIZE << eth::Instruction::SUB;
}
else
m_context << u256(argumentSize);
// stack: <memptr> <argument size>
m_context << eth::Instruction::DUP1;
m_context.appendProgramSize();