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Correct stack height adjustment after returnsub.

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This commit is contained in:
chriseth 2017-05-31 13:06:51 +02:00
parent ba5ee71b7f
commit 0185f3cbf6
5 changed files with 6 additions and 6 deletions
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2
libjulia/backends/evm/AbstractAssembly.h
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@ -83,7 +83,7 @@ public:
/// Call a subroutine.
virtual void appendJumpsub(LabelID _label, int _arguments, int _returns) = 0;
/// Return from a subroutine.
virtual void appendReturnsub(int _returns) = 0;
virtual void appendReturnsub(int _returns, int _stackDiffAfter = 0) = 0;
};
enum class IdentifierContext { LValue, RValue };

4
libjulia/backends/evm/EVMAssembly.cpp
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@ -134,12 +134,12 @@ void EVMAssembly::appendJumpsub(AbstractAssembly::LabelID _labelId, int _argumen
m_stackHeight += _returns - _arguments;
}
void EVMAssembly::appendReturnsub(int _returns)
void EVMAssembly::appendReturnsub(int _returns, int _stackDiffAfter)
{
solAssert(m_evm15, "RETURNSUB used for EVM 1.0");
solAssert(_returns >= 0, "");
m_bytecode.push_back(byte(solidity::Instruction::RETURNSUB));
m_stackHeight -= _returns;
m_stackHeight += _stackDiffAfter - _returns;
}
eth::LinkerObject EVMAssembly::finalize()

2
libjulia/backends/evm/EVMAssembly.h
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@ -68,7 +68,7 @@ public:
/// Call a subroutine.
virtual void appendJumpsub(LabelID _label, int _arguments, int _returns) override;
/// Return from a subroutine.
virtual void appendReturnsub(int _returns) override;
virtual void appendReturnsub(int _returns, int _stackDiffAfter) override;
/// Resolves references inside the bytecode and returns the linker object.

2
libjulia/backends/evm/EVMCodeTransform.cpp
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@ -347,7 +347,7 @@ void CodeTransform::operator()(FunctionDefinition const& _function)
}
if (m_evm15)
m_assembly.appendReturnsub(_function.returns.size());
m_assembly.appendReturnsub(_function.returns.size(), stackHeightBefore);
else
m_assembly.appendJump(stackHeightBefore - _function.returns.size());
m_stackAdjustment -= localStackAdjustment;

2
libsolidity/inlineasm/AsmCodeGen.cpp
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@ -115,7 +115,7 @@ public:
}
/// Return from a subroutine.
virtual void appendReturnsub(int) override
virtual void appendReturnsub(int, int) override
{
// TODO we could emulate that, though
solAssert(false, "RETURNSUB not implemented for EVM 1.0");