Merge pull request #1697 from chriseth/sol_bytesInEvents

bytes parameters for events and sha3.

AST.cpp

@@ -450,14 +450,11 @@ void FunctionDefinition::checkTypeRequirements()
 	{
 		if (!var->getType()->canLiveOutsideStorage())
 			BOOST_THROW_EXCEPTION(var->createTypeError("Type is required to live outside storage."));
+		// todo delete when will be implemented arrays as parameter type in internal functions
+		if (getVisibility() == Visibility::Public && var->getType()->getCategory() == Type::Category::Array)
+			BOOST_THROW_EXCEPTION(var->createTypeError("Arrays only implemented for external functions."));
 		if (getVisibility() >= Visibility::Public && !(var->getType()->externalType()))
-		{
-			// todo delete when will be implemented arrays as parameter type in internal functions
-			if (getVisibility() == Visibility::Public && var->getType()->getCategory() == Type::Category::Array)
-				BOOST_THROW_EXCEPTION(var->createTypeError("Arrays only implemented for external functions."));
-			else
-				BOOST_THROW_EXCEPTION(var->createTypeError("Internal type is not allowed for public and external functions."));
-		}
+			BOOST_THROW_EXCEPTION(var->createTypeError("Internal type is not allowed for public and external functions."));
 	}
 	for (ASTPointer<ModifierInvocation> const& modifier: m_functionModifiers)
 		modifier->checkTypeRequirements(isConstructor() ?

CompilerUtils.cpp

@@ -155,6 +155,13 @@ void CompilerUtils::copyToStackTop(unsigned _stackDepth, unsigned _itemSize)
 		m_context << eth::dupInstruction(_stackDepth);
 }
 
+void CompilerUtils::moveToStackTop(unsigned _stackDepth)
+{
+	solAssert(_stackDepth <= 15, "Stack too deep.");
+	for (unsigned i = 0; i < _stackDepth; ++i)
+		m_context << eth::swapInstruction(1 + i);
+}
+
 void CompilerUtils::popStackElement(Type const& _type)
 {
 	popStackSlots(_type.getSizeOnStack());

CompilerUtils.h

@@ -77,6 +77,8 @@ public:
 	/// Copies an item that occupies @a _itemSize stack slots from a stack depth of @a _stackDepth
 	/// to the top of the stack.
 	void copyToStackTop(unsigned _stackDepth, unsigned _itemSize);
+	/// Moves a single stack element (with _stackDepth items on top of it) to the top of the stack.
+	void moveToStackTop(unsigned _stackDepth);
 	/// Removes the current value from the top of the stack.
 	void popStackElement(Type const& _type);
 	/// Removes element from the top of the stack _amount times.

ExpressionCompiler.cpp

@@ -531,9 +531,12 @@ bool ExpressionCompiler::visit(FunctionCall const& _functionCall)
 			break;
 		case Location::SHA3:
 		{
-			m_context << u256(0);
-			appendArgumentsCopyToMemory(arguments, TypePointers(), function.padArguments());
-			m_context << u256(0) << eth::Instruction::SHA3;
+			// we might compute a sha as part of argumentsAppendCopyToMemory, this is only a hack
+			// and should be removed once we have a real free memory pointer
+			m_context << u256(0x40);
+			appendArgumentsCopyToMemory(arguments, TypePointers(), function.padArguments(), false, true);
+			m_context << u256(0x40) << eth::Instruction::SWAP1 << eth::Instruction::SUB;
+			m_context << u256(0x40) << eth::Instruction::SHA3;
 			break;
 		}
 		case Location::Log0:
@@ -574,11 +577,19 @@ bool ExpressionCompiler::visit(FunctionCall const& _functionCall)
 			}
 			solAssert(numIndexed <= 4, "Too many indexed arguments.");
 			// Copy all non-indexed arguments to memory (data)
-			m_context << u256(0);
+			// Memory position is only a hack and should be removed once we have free memory pointer.
+			m_context << u256(0x40);
+			vector<ASTPointer<Expression const>> nonIndexedArgs;
+			TypePointers nonIndexedTypes;
 			for (unsigned arg = 0; arg < arguments.size(); ++arg)
 				if (!event.getParameters()[arg]->isIndexed())
-					appendExpressionCopyToMemory(*function.getParameterTypes()[arg], *arguments[arg]);
-			m_context << u256(0) << eth::logInstruction(numIndexed);
+				{
+					nonIndexedArgs.push_back(arguments[arg]);
+					nonIndexedTypes.push_back(function.getParameterTypes()[arg]);
+				}
+			appendArgumentsCopyToMemory(nonIndexedArgs, nonIndexedTypes);
+			m_context << u256(0x40) << eth::Instruction::SWAP1 << eth::Instruction::SUB;
+			m_context << u256(0x40) << eth::logInstruction(numIndexed);
 			break;
 		}
 		case Location::BlockHash:
@@ -1046,8 +1057,14 @@ void ExpressionCompiler::appendExternalFunctionCall(FunctionType const& _functio
 
 	// For bare call, activate "4 byte pad exception": If the first argument has exactly 4 bytes,
 	// do not pad it to 32 bytes.
-	appendArgumentsCopyToMemory(_arguments, _functionType.getParameterTypes(),
-								_functionType.padArguments(), bare);
+	// If the function takes arbitrary parameters, copy dynamic length data in place.
+	appendArgumentsCopyToMemory(
+		_arguments,
+		_functionType.getParameterTypes(),
+		_functionType.padArguments(),
+		bare,
+		_functionType.takesArbitraryParameters()
+	);
 
 	// CALL arguments: outSize, outOff, inSize, (already present up to here)
 	// inOff, value, addr, gas (stack top)
@@ -1089,20 +1106,72 @@ void ExpressionCompiler::appendArgumentsCopyToMemory(
 	vector<ASTPointer<Expression const>> const& _arguments,
 	TypePointers const& _types,
 	bool _padToWordBoundaries,
-	bool _padExceptionIfFourBytes
+	bool _padExceptionIfFourBytes,
+	bool _copyDynamicDataInPlace
 )
 {
 	solAssert(_types.empty() || _types.size() == _arguments.size(), "");
+	TypePointers types = _types;
+	if (_types.empty())
+		for (ASTPointer<Expression const> const& argument: _arguments)
+			types.push_back(argument->getType()->getRealType());
+
+	vector<size_t> dynamicArguments;
+	unsigned stackSizeOfDynamicTypes = 0;
 	for (size_t i = 0; i < _arguments.size(); ++i)
 	{
 		_arguments[i]->accept(*this);
-		TypePointer const& expectedType = _types.empty() ? _arguments[i]->getType()->getRealType() : _types[i];
-		appendTypeConversion(*_arguments[i]->getType(), *expectedType, true);
+		TypePointer argType = types[i]->externalType();
+		solAssert(!!argType, "Externalable type expected.");
+		if (argType->isValueType())
+			appendTypeConversion(*_arguments[i]->getType(), *argType, true);
+		else
+			argType = _arguments[i]->getType()->getRealType()->externalType();
+		solAssert(!!argType, "Externalable type expected.");
 		bool pad = _padToWordBoundaries;
 		// Do not pad if the first argument has exactly four bytes
-		if (i == 0 && pad && _padExceptionIfFourBytes && expectedType->getCalldataEncodedSize(false) == 4)
+		if (i == 0 && pad && _padExceptionIfFourBytes && argType->getCalldataEncodedSize(false) == 4)
 			pad = false;
-		appendTypeMoveToMemory(*expectedType, pad);
+		if (!_copyDynamicDataInPlace && argType->isDynamicallySized())
+		{
+			solAssert(argType->getCategory() == Type::Category::Array, "Unknown dynamic type.");
+			auto const& arrayType = dynamic_cast<ArrayType const&>(*_arguments[i]->getType());
+			// move memory reference to top of stack
+			CompilerUtils(m_context).moveToStackTop(arrayType.getSizeOnStack());
+			if (arrayType.getLocation() == ArrayType::Location::CallData)
+				m_context << eth::Instruction::DUP2; // length is on stack
+			else if (arrayType.getLocation() == ArrayType::Location::Storage)
+				m_context << eth::Instruction::DUP3 << eth::Instruction::SLOAD;
+			else
+			{
+				solAssert(arrayType.getLocation() == ArrayType::Location::Memory, "");
+				m_context << eth::Instruction::DUP2 << eth::Instruction::MLOAD;
+			}
+			appendTypeMoveToMemory(IntegerType(256), true);
+			stackSizeOfDynamicTypes += arrayType.getSizeOnStack();
+			dynamicArguments.push_back(i);
+		}
+		else
+			appendTypeMoveToMemory(*argType, pad);
+	}
+
+	// copy dynamic values to memory
+	unsigned dynStackPointer = stackSizeOfDynamicTypes;
+	// stack layout: <dyn arg 1> ... <dyn arg m> <memory pointer>
+	for (size_t i: dynamicArguments)
+	{
+		auto const& arrayType = dynamic_cast<ArrayType const&>(*_arguments[i]->getType());
+		CompilerUtils(m_context).copyToStackTop(1 + dynStackPointer, arrayType.getSizeOnStack());
+		dynStackPointer -= arrayType.getSizeOnStack();
+		appendTypeMoveToMemory(arrayType, true);
+	}
+	solAssert(dynStackPointer == 0, "");
+
+	// remove dynamic values (and retain memory pointer)
+	if (stackSizeOfDynamicTypes > 0)
+	{
+		m_context << eth::swapInstruction(stackSizeOfDynamicTypes);
+		CompilerUtils(m_context).popStackSlots(stackSizeOfDynamicTypes);
 	}
 }
 
@@ -1114,8 +1183,13 @@ void ExpressionCompiler::appendTypeMoveToMemory(Type const& _type, bool _padToWo
 void ExpressionCompiler::appendExpressionCopyToMemory(Type const& _expectedType, Expression const& _expression)
 {
 	_expression.accept(*this);
-	appendTypeConversion(*_expression.getType(), _expectedType, true);
-	appendTypeMoveToMemory(_expectedType);
+	if (_expectedType.isValueType())
+	{
+		appendTypeConversion(*_expression.getType(), _expectedType, true);
+		appendTypeMoveToMemory(_expectedType);
+	}
+	else
+		appendTypeMoveToMemory(*_expression.getType()->getRealType());
 }
 
 void ExpressionCompiler::setLValueFromDeclaration(Declaration const& _declaration, Expression const& _expression)

ExpressionCompiler.h

@@ -100,12 +100,18 @@ private:
 	/// Appends code to call a function of the given type with the given arguments.
 	void appendExternalFunctionCall(FunctionType const& _functionType, std::vector<ASTPointer<Expression const>> const& _arguments,
 									bool bare = false);
-	/// Appends code that evaluates the given arguments and moves the result to memory. The memory offset is
-	/// expected to be on the stack and is updated by this call.
-	void appendArgumentsCopyToMemory(std::vector<ASTPointer<Expression const>> const& _arguments,
-									 TypePointers const& _types = {},
-									 bool _padToWordBoundaries = true,
-									 bool _padExceptionIfFourBytes = false);
+	/// Appends code that evaluates the given arguments and moves the result to memory encoded as
+	/// specified by the ABI. The memory offset is expected to be on the stack and is updated by
+	/// this call. If @a _padToWordBoundaries is set to false, all values are concatenated without
+	/// padding. If @a _copyDynamicDataInPlace is set, dynamic types is stored (without length)
+	/// together with fixed-length data.
+	void appendArgumentsCopyToMemory(
+		std::vector<ASTPointer<Expression const>> const& _arguments,
+		TypePointers const& _types = {},
+		bool _padToWordBoundaries = true,
+		bool _padExceptionIfFourBytes = false,
+		bool _copyDynamicDataInPlace = false
+	);
 	/// Appends code that moves a stack element of the given type to memory. The memory offset is
 	/// expected below the stack element and is updated by this call.
 	void appendTypeMoveToMemory(Type const& _type, bool _padToWordBoundaries = true);

Types.cpp

@@ -745,8 +745,6 @@ string ArrayType::toString() const
 
 TypePointer ArrayType::externalType() const
 {
-	if (m_location != Location::CallData)
-		return TypePointer();
 	if (m_isByteArray)
 		return shared_from_this();
 	if (!m_baseType->externalType())
@@ -1218,7 +1216,9 @@ string FunctionType::externalSignature(std::string const& _name) const
 	}
 	string ret = funcName + "(";
 
-	TypePointers externalParameterTypes = externalFunctionType()->getParameterTypes();
+	FunctionTypePointer external = externalFunctionType();
+	solAssert(!!external, "External function type requested.");
+	TypePointers externalParameterTypes = external->getParameterTypes();
 	for (auto it = externalParameterTypes.cbegin(); it != externalParameterTypes.cend(); ++it)
 	{
 		solAssert(!!(*it), "Parameter should have external type");

Types.h

@@ -430,7 +430,7 @@ public:
 	virtual bool isExplicitlyConvertibleTo(Type const& _convertTo) const override;
 	virtual TypePointer unaryOperatorResult(Token::Value _operator) const override;
 	virtual bool operator==(Type const& _other) const override;
-	virtual unsigned getCalldataEncodedSize(bool _padded = true) const override
+	virtual unsigned getCalldataEncodedSize(bool _padded ) const override
 	{
 		return externalType()->getCalldataEncodedSize(_padded);
 	}
@@ -506,7 +506,7 @@ public:
 	explicit EnumType(EnumDefinition const& _enum): m_enum(_enum) {}
 	virtual TypePointer unaryOperatorResult(Token::Value _operator) const override;
 	virtual bool operator==(Type const& _other) const override;
-	virtual unsigned getCalldataEncodedSize(bool _padded = true) const override
+	virtual unsigned getCalldataEncodedSize(bool _padded) const override
 	{
 		return externalType()->getCalldataEncodedSize(_padded);
 	}
@@ -558,7 +558,7 @@ public:
 	/// appropriate external types of input/return parameters of current function.
 	/// Returns an empty shared pointer if one of the input/return parameters does not have an
 	/// external type.
-	virtual FunctionTypePointer externalFunctionType() const;
+	FunctionTypePointer externalFunctionType() const;
 	virtual TypePointer externalType() const override { return externalFunctionType(); }
 
 	explicit FunctionType(FunctionDefinition const& _function, bool _isInternal = true);