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Bare functions take single bytes argument.

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This commit is contained in:
chriseth 2018-05-18 18:03:41 +02:00 committed by Alex Beregszaszi
parent 0e66a1ddde
commit 23c4142005
5 changed files with 44 additions and 94 deletions
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8
libsolidity/analysis/GlobalContext.cpp
View File

@ -42,7 +42,7 @@ m_magicVariables(vector<shared_ptr<MagicVariableDeclaration const>>{
make_shared<MagicVariableDeclaration>("blockhash", make_shared<FunctionType>(strings{"uint256"}, strings{"bytes32"}, FunctionType::Kind::BlockHash, false, StateMutability::View)),
make_shared<MagicVariableDeclaration>("ecrecover", make_shared<FunctionType>(strings{"bytes32", "uint8", "bytes32", "bytes32"}, strings{"address"}, FunctionType::Kind::ECRecover, false, StateMutability::Pure)),
make_shared<MagicVariableDeclaration>("gasleft", make_shared<FunctionType>(strings(), strings{"uint256"}, FunctionType::Kind::GasLeft, false, StateMutability::View)),
make_shared<MagicVariableDeclaration>("keccak256", make_shared<FunctionType>(strings(), strings{"bytes32"}, FunctionType::Kind::SHA3, true, StateMutability::Pure)),
make_shared<MagicVariableDeclaration>("keccak256", make_shared<FunctionType>(strings{"bytes memory"}, strings{"bytes32"}, FunctionType::Kind::SHA3, false, StateMutability::Pure)),
make_shared<MagicVariableDeclaration>("log0", make_shared<FunctionType>(strings{"bytes32"}, strings{}, FunctionType::Kind::Log0)),
make_shared<MagicVariableDeclaration>("log1", make_shared<FunctionType>(strings{"bytes32", "bytes32"}, strings{}, FunctionType::Kind::Log1)),
make_shared<MagicVariableDeclaration>("log2", make_shared<FunctionType>(strings{"bytes32", "bytes32", "bytes32"}, strings{}, FunctionType::Kind::Log2)),
@ -55,10 +55,10 @@ m_magicVariables(vector<shared_ptr<MagicVariableDeclaration const>>{
make_shared<MagicVariableDeclaration>("require", make_shared<FunctionType>(strings{"bool", "string memory"}, strings{}, FunctionType::Kind::Require, false, StateMutability::Pure)),
make_shared<MagicVariableDeclaration>("revert", make_shared<FunctionType>(strings(), strings(), FunctionType::Kind::Revert, false, StateMutability::Pure)),
make_shared<MagicVariableDeclaration>("revert", make_shared<FunctionType>(strings{"string memory"}, strings(), FunctionType::Kind::Revert, false, StateMutability::Pure)),
make_shared<MagicVariableDeclaration>("ripemd160", make_shared<FunctionType>(strings(), strings{"bytes20"}, FunctionType::Kind::RIPEMD160, true, StateMutability::Pure)),
make_shared<MagicVariableDeclaration>("ripemd160", make_shared<FunctionType>(strings{"bytes memory"}, strings{"bytes20"}, FunctionType::Kind::RIPEMD160, false, StateMutability::Pure)),
make_shared<MagicVariableDeclaration>("selfdestruct", make_shared<FunctionType>(strings{"address"}, strings{}, FunctionType::Kind::Selfdestruct)),
make_shared<MagicVariableDeclaration>("sha256", make_shared<FunctionType>(strings(), strings{"bytes32"}, FunctionType::Kind::SHA256, true, StateMutability::Pure)),
make_shared<MagicVariableDeclaration>("sha3", make_shared<FunctionType>(strings(), strings{"bytes32"}, FunctionType::Kind::SHA3, true, StateMutability::Pure)),
make_shared<MagicVariableDeclaration>("sha256", make_shared<FunctionType>(strings{"bytes memory"}, strings{"bytes32"}, FunctionType::Kind::SHA256, false, StateMutability::Pure)),
make_shared<MagicVariableDeclaration>("sha3", make_shared<FunctionType>(strings{"bytes memory"}, strings{"bytes32"}, FunctionType::Kind::SHA3, false, StateMutability::Pure)),
make_shared<MagicVariableDeclaration>("suicide", make_shared<FunctionType>(strings{"address"}, strings{}, FunctionType::Kind::Selfdestruct)),
make_shared<MagicVariableDeclaration>("tx", make_shared<MagicType>(MagicType::Kind::Transaction))
})

29
libsolidity/analysis/TypeChecker.cpp
View File

@ -1750,35 +1750,6 @@ bool TypeChecker::visit(FunctionCall const& _functionCall)
}
}
if (functionType->takesSinglePackedBytesParameter())
{
if (
(arguments.size() > 1) ||
(arguments.size() == 1 && !type(*arguments.front())->isImplicitlyConvertibleTo(ArrayType(DataLocation::Memory)))
)
{
string msg =
"This function only accepts a single \"bytes\" argument. Please use "
"\"abi.encodePacked(...)\" or a similar function to encode the data.";
if (v050)
m_errorReporter.typeError(_functionCall.location(), msg);
else
m_errorReporter.warning(_functionCall.location(), msg);
}
if (arguments.size() == 1 && !type(*arguments.front())->isImplicitlyConvertibleTo(ArrayType(DataLocation::Memory)))
{
string msg =
"The provided argument of type " +
type(*arguments.front())->toString() +
" is not implicitly convertible to expected type bytes memory.";
if (v050)
m_errorReporter.typeError(_functionCall.location(), msg);
else
m_errorReporter.warning(_functionCall.location(), msg);
}
}
if (functionType->takesArbitraryParameters() && arguments.size() < parameterTypes.size())
{
solAssert(_functionCall.annotation().kind == FunctionCallKind::FunctionCall, "");

25
libsolidity/ast/Types.cpp
View File

@ -599,9 +599,9 @@ MemberList::MemberMap IntegerType::nativeMembers(ContractDefinition const*) cons
if (isAddress())
return {
{"balance", make_shared<IntegerType>(256)},
{"call", make_shared<FunctionType>(strings(), strings{"bool"}, FunctionType::Kind::BareCall, true, StateMutability::Payable)},
{"callcode", make_shared<FunctionType>(strings(), strings{"bool"}, FunctionType::Kind::BareCallCode, true, StateMutability::Payable)},
{"delegatecall", make_shared<FunctionType>(strings(), strings{"bool"}, FunctionType::Kind::BareDelegateCall, true)},
{"call", make_shared<FunctionType>(strings{"bytes memory"}, strings{"bool"}, FunctionType::Kind::BareCall, true, StateMutability::Payable)},
{"callcode", make_shared<FunctionType>(strings{"bytes memory"}, strings{"bool"}, FunctionType::Kind::BareCallCode, true, StateMutability::Payable)},
{"delegatecall", make_shared<FunctionType>(strings{"bytes memory"}, strings{"bool"}, FunctionType::Kind::BareDelegateCall, true)},
{"send", make_shared<FunctionType>(strings{"uint"}, strings{"bool"}, FunctionType::Kind::Send)},
{"transfer", make_shared<FunctionType>(strings{"uint"}, strings(), FunctionType::Kind::Transfer)}
};
@ -3001,6 +3001,25 @@ ASTPointer<ASTString> FunctionType::documentation() const
return ASTPointer<ASTString>();
}
bool FunctionType::padArguments() const
{
// No padding only for hash functions, low-level calls and the packed encoding function.
switch (m_kind)
{
case Kind::BareCall:
case Kind::BareCallCode:
case Kind::BareDelegateCall:
case Kind::SHA256:
case Kind::RIPEMD160:
case Kind::SHA3:
case Kind::ABIEncodePacked:
return false;
default:
return true;
}
return true;
}
string MappingType::richIdentifier() const
{
return "t_mapping" + identifierList(m_keyType, m_valueType);

5
libsolidity/ast/Types.h
View File

@ -1058,8 +1058,9 @@ public:
ASTPointer<ASTString> documentation() const;
/// true iff arguments are to be padded to multiples of 32 bytes for external calls
/// TODO should this be true in general for bareCall*?
bool padArguments() const { return !(m_kind == Kind::SHA3 || m_kind == Kind::SHA256 || m_kind == Kind::RIPEMD160 || m_kind == Kind::ABIEncodePacked); }
/// The only functions that do not pad are hash functions, the low-level call functions
/// and abi.encodePacked.
bool padArguments() const;
bool takesArbitraryParameters() const { return m_arbitraryParameters; }
/// true iff the function takes a single bytes parameter and it is passed on without padding.
bool takesSinglePackedBytesParameter() const

71
libsolidity/codegen/ExpressionCompiler.cpp
View File

@ -1837,39 +1837,12 @@ void ExpressionCompiler::appendExternalFunctionCall(
// Evaluate arguments.
TypePointers argumentTypes;
TypePointers parameterTypes = _functionType.parameterTypes();
// This can be removed (will always be false) with 0.5.0
bool manualFunctionId = false;
if (
(funKind == FunctionType::Kind::BareCall || funKind == FunctionType::Kind::BareCallCode || funKind == FunctionType::Kind::BareDelegateCall) &&
!_arguments.empty()
)
{
solAssert(_arguments.front()->annotation().type->mobileType(), "");
manualFunctionId =
_arguments.front()->annotation().type->mobileType()->calldataEncodedSize(false) ==
CompilerUtils::dataStartOffset;
}
if (manualFunctionId)
{
// If we have a Bare* and the first type has exactly 4 bytes, use it as
// function identifier.
_arguments.front()->accept(*this);
utils().convertType(
*_arguments.front()->annotation().type,
IntegerType(8 * CompilerUtils::dataStartOffset),
true
);
for (unsigned i = 0; i < gasValueSize; ++i)
m_context << swapInstruction(gasValueSize - i);
gasStackPos++;
valueStackPos++;
}
if (_functionType.bound())
{
argumentTypes.push_back(_functionType.selfType());
parameterTypes.insert(parameterTypes.begin(), _functionType.selfType());
}
for (size_t i = manualFunctionId ? 1 : 0; i < _arguments.size(); ++i)
for (size_t i = 0; i < _arguments.size(); ++i)
{
_arguments[i]->accept(*this);
argumentTypes.push_back(_arguments[i]->annotation().type);
@ -1905,36 +1878,22 @@ void ExpressionCompiler::appendExternalFunctionCall(
// Copy function identifier to memory.
utils().fetchFreeMemoryPointer();
if (!_functionType.isBareCall() || manualFunctionId)
if (!_functionType.isBareCall())
{
m_context << dupInstruction(2 + gasValueSize + CompilerUtils::sizeOnStack(argumentTypes));
utils().storeInMemoryDynamic(IntegerType(8 * CompilerUtils::dataStartOffset), false);
}
// This is a function that takes a single bytes parameter which is supposed to be passed
// on inline and without padding.
if (_functionType.takesSinglePackedBytesParameter() && v050 && argumentTypes.size() == 1)
{
utils().encodeToMemory(
argumentTypes,
TypePointers{make_shared<ArrayType>(DataLocation::Memory)},
false,
true
);
}
else
{
// If the function takes arbitrary parameters, copy dynamic length data in place.
// Move arguments to memory, will not update the free memory pointer (but will update the memory
// pointer on the stack).
utils().encodeToMemory(
argumentTypes,
parameterTypes,
_functionType.padArguments(),
_functionType.takesArbitraryParameters(),
isCallCode || isDelegateCall
);
}
// If the function takes arbitrary parameters or is a bare call, copy dynamic length data in place.
// Move arguments to memory, will not update the free memory pointer (but will update the memory
// pointer on the stack).
utils().encodeToMemory(
argumentTypes,
parameterTypes,
_functionType.padArguments(),
_functionType.takesArbitraryParameters() || _functionType.isBareCall(),
isCallCode || isDelegateCall
);
// Stack now:
// <stack top>
@ -2013,9 +1972,9 @@ void ExpressionCompiler::appendExternalFunctionCall(
unsigned remainsSize =
2 + // contract address, input_memory_end
_functionType.valueSet() +
_functionType.gasSet() +
(!_functionType.isBareCall() || manualFunctionId);
(_functionType.valueSet() ? 1 : 0) +
(_functionType.gasSet() ? 1 : 0) +
(!_functionType.isBareCall() ? 1 : 0);
if (returnSuccessCondition)
m_context << swapInstruction(remainsSize);