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Specify value for contract creation.

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This commit is contained in:
Christian 2015-01-13 18:12:19 +01:00
parent ec022783c4
commit b440d7e321
9 changed files with 85 additions and 85 deletions
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15
AST.cpp
View File

@ -309,20 +309,13 @@ bool FunctionCall::isTypeConversion() const
void NewExpression::checkTypeRequirements()
{
m_contractName->checkTypeRequirements();
for (ASTPointer<Expression> const& argument: m_arguments)
argument->checkTypeRequirements();
m_contract = dynamic_cast<ContractDefinition const*>(m_contractName->getReferencedDeclaration());
if (!m_contract)
BOOST_THROW_EXCEPTION(createTypeError("Identifier is not a contract."));
shared_ptr<ContractType const> type = make_shared<ContractType>(*m_contract);
m_type = type;
TypePointers const& parameterTypes = type->getConstructorType()->getParameterTypes();
if (parameterTypes.size() != m_arguments.size())
BOOST_THROW_EXCEPTION(createTypeError("Wrong argument count for constructor call."));
for (size_t i = 0; i < m_arguments.size(); ++i)
if (!m_arguments[i]->getType()->isImplicitlyConvertibleTo(*parameterTypes[i]))
BOOST_THROW_EXCEPTION(createTypeError("Invalid type for argument in constructor call."));
shared_ptr<ContractType const> contractType = make_shared<ContractType>(*m_contract);
TypePointers const& parameterTypes = contractType->getConstructorType()->getParameterTypes();
m_type = make_shared<FunctionType>(parameterTypes, TypePointers{contractType},
FunctionType::Location::CREATION);
}
void MemberAccess::checkTypeRequirements()

10
AST.h
View File

@ -790,26 +790,22 @@ private:
};
/**
* Expression that creates a new contract, e.g. "new SomeContract(1, 2)".
* Expression that creates a new contract, e.g. the "new SomeContract" part in "new SomeContract(1, 2)".
*/
class NewExpression: public Expression
{
public:
NewExpression(Location const& _location, ASTPointer<Identifier> const& _contractName,
std::vector<ASTPointer<Expression>> const& _arguments):
Expression(_location), m_contractName(_contractName), m_arguments(_arguments) {}
NewExpression(Location const& _location, ASTPointer<Identifier> const& _contractName):
Expression(_location), m_contractName(_contractName) {}
virtual void accept(ASTVisitor& _visitor) override;
virtual void accept(ASTConstVisitor& _visitor) const override;
virtual void checkTypeRequirements() override;
std::vector<ASTPointer<Expression const>> getArguments() const { return {m_arguments.begin(), m_arguments.end()}; }
/// Returns the referenced contract. Can only be called after type checking.
ContractDefinition const* getContract() const { solAssert(m_contract, ""); return m_contract; }
private:
ASTPointer<Identifier> m_contractName;
std::vector<ASTPointer<Expression>> m_arguments;
ContractDefinition const* m_contract = nullptr;
};

6
AST_accept.h
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@ -452,20 +452,14 @@ void FunctionCall::accept(ASTConstVisitor& _visitor) const
void NewExpression::accept(ASTVisitor& _visitor)
{
if (_visitor.visit(*this))
{
m_contractName->accept(_visitor);
listAccept(m_arguments, _visitor);
}
_visitor.endVisit(*this);
}
void NewExpression::accept(ASTConstVisitor& _visitor) const
{
if (_visitor.visit(*this))
{
m_contractName->accept(_visitor);
listAccept(m_arguments, _visitor);
}
_visitor.endVisit(*this);
}

102
ExpressionCompiler.cpp
View File

@ -235,6 +235,36 @@ bool ExpressionCompiler::visit(FunctionCall const& _functionCall)
_functionCall.getExpression().accept(*this);
appendExternalFunctionCall(function, arguments, function.getLocation() == Location::BARE);
break;
case Location::CREATION:
{
_functionCall.getExpression().accept(*this);
solAssert(!function.gasSet(), "Gas limit set for contract creation.");
solAssert(function.getReturnParameterTypes().size() == 1, "");
ContractDefinition const& contract = dynamic_cast<ContractType const&>(
*function.getReturnParameterTypes().front()).getContractDefinition();
// copy the contract's code into memory
bytes const& bytecode = m_context.getCompiledContract(contract);
m_context << u256(bytecode.size());
//@todo could be done by actually appending the Assembly, but then we probably need to compile
// multiple times. Will revisit once external fuctions are inlined.
m_context.appendData(bytecode);
//@todo copy to memory position 0, shift as soon as we use memory
m_context << u256(0) << eth::Instruction::CODECOPY;
unsigned length = bytecode.size();
length += appendArgumentCopyToMemory(function.getParameterTypes(), arguments, length);
// size, offset, endowment
m_context << u256(length) << u256(0);
if (function.valueSet())
m_context << eth::dupInstruction(3);
else
m_context << u256(0);
m_context << eth::Instruction::CREATE;
if (function.valueSet())
m_context << eth::swapInstruction(1) << eth::Instruction::POP;
return false;
break;
}
case Location::SET_GAS:
{
// stack layout: contract_address function_id [gas] [value]
@ -316,38 +346,7 @@ bool ExpressionCompiler::visit(FunctionCall const& _functionCall)
bool ExpressionCompiler::visit(NewExpression const& _newExpression)
{
ContractType const* type = dynamic_cast<ContractType const*>(_newExpression.getType().get());
solAssert(type, "");
TypePointers const& types = type->getConstructorType()->getParameterTypes();
vector<ASTPointer<Expression const>> arguments = _newExpression.getArguments();
solAssert(arguments.size() == types.size(), "");
// copy the contracts code into memory
bytes const& bytecode = m_context.getCompiledContract(*_newExpression.getContract());
m_context << u256(bytecode.size());
//@todo could be done by actually appending the Assembly, but then we probably need to compile
// multiple times. Will revisit once external fuctions are inlined.
m_context.appendData(bytecode);
//@todo copy to memory position 0, shift as soon as we use memory
m_context << u256(0) << eth::Instruction::CODECOPY;
unsigned dataOffset = bytecode.size();
for (unsigned i = 0; i < arguments.size(); ++i)
{
arguments[i]->accept(*this);
appendTypeConversion(*arguments[i]->getType(), *types[i], true);
unsigned const c_numBytes = types[i]->getCalldataEncodedSize();
if (c_numBytes > 32)
BOOST_THROW_EXCEPTION(CompilerError()
<< errinfo_sourceLocation(arguments[i]->getLocation())
<< errinfo_comment("Type " + types[i]->toString() + " not yet supported."));
bool const c_leftAligned = types[i]->getCategory() == Type::Category::STRING;
bool const c_padToWords = true;
dataOffset += CompilerUtils(m_context).storeInMemory(dataOffset, c_numBytes,
c_leftAligned, c_padToWords);
}
// size, offset, endowment
m_context << u256(dataOffset) << u256(0) << u256(0) << eth::Instruction::CREATE;
// code is created for the function call (CREATION) only
return false;
}
@ -680,21 +679,8 @@ void ExpressionCompiler::appendExternalFunctionCall(FunctionType const& _functio
}
unsigned dataOffset = bare ? 0 : CompilerUtils::dataStartOffset; // reserve 4 bytes for the function's hash identifier
for (unsigned i = 0; i < _arguments.size(); ++i)
{
_arguments[i]->accept(*this);
Type const& type = *_functionType.getParameterTypes()[i];
appendTypeConversion(*_arguments[i]->getType(), type, true);
unsigned const c_numBytes = type.getCalldataEncodedSize();
if (c_numBytes == 0 || c_numBytes > 32)
BOOST_THROW_EXCEPTION(CompilerError()
<< errinfo_sourceLocation(_arguments[i]->getLocation())
<< errinfo_comment("Type " + type.toString() + " not yet supported."));
bool const c_leftAligned = type.getCategory() == Type::Category::STRING;
bool const c_padToWords = true;
dataOffset += CompilerUtils(m_context).storeInMemory(dataOffset, c_numBytes,
c_leftAligned, c_padToWords);
}
dataOffset += appendArgumentCopyToMemory(_functionType.getParameterTypes(), _arguments, dataOffset);
//@todo only return the first return value for now
Type const* firstType = _functionType.getReturnParameterTypes().empty() ? nullptr :
_functionType.getReturnParameterTypes().front().get();
@ -728,6 +714,28 @@ void ExpressionCompiler::appendExternalFunctionCall(FunctionType const& _functio
}
}
unsigned ExpressionCompiler::appendArgumentCopyToMemory(TypePointers const& _types,
vector<ASTPointer<Expression const>> const& _arguments,
unsigned _memoryOffset)
{
unsigned length = 0;
for (unsigned i = 0; i < _arguments.size(); ++i)
{
_arguments[i]->accept(*this);
appendTypeConversion(*_arguments[i]->getType(), *_types[i], true);
unsigned const c_numBytes = _types[i]->getCalldataEncodedSize();
if (c_numBytes == 0 || c_numBytes > 32)
BOOST_THROW_EXCEPTION(CompilerError()
<< errinfo_sourceLocation(_arguments[i]->getLocation())
<< errinfo_comment("Type " + _types[i]->toString() + " not yet supported."));
bool const c_leftAligned = _types[i]->getCategory() == Type::Category::STRING;
bool const c_padToWords = true;
length += CompilerUtils(m_context).storeInMemory(_memoryOffset + length, c_numBytes,
c_leftAligned, c_padToWords);
}
return length;
}
ExpressionCompiler::LValue::LValue(CompilerContext& _compilerContext, LValueType _type, Type const& _dataType,
unsigned _baseStackOffset):
m_context(&_compilerContext), m_type(_type), m_baseStackOffset(_baseStackOffset),

4
ExpressionCompiler.h
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@ -90,6 +90,10 @@ 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 copies the given arguments to memory (with optional offset).
/// @returns the number of bytes copied to memory
unsigned appendArgumentCopyToMemory(TypePointers const& _functionType, std::vector<ASTPointer<Expression const>> const& _arguments,
unsigned _memoryOffset = 0);
/**
* Helper class to store and retrieve lvalues to and from various locations.

24
Parser.cpp
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@ -466,17 +466,7 @@ ASTPointer<Expression> Parser::parseUnaryExpression()
{
ASTNodeFactory nodeFactory(*this);
Token::Value token = m_scanner->getCurrentToken();
if (token == Token::NEW)
{
expectToken(Token::NEW);
ASTPointer<Identifier> contractName = ASTNodeFactory(*this).createNode<Identifier>(expectIdentifierToken());
expectToken(Token::LPAREN);
vector<ASTPointer<Expression>> arguments(parseFunctionCallArguments());
expectToken(Token::RPAREN);
nodeFactory.markEndPosition();
return nodeFactory.createNode<NewExpression>(contractName, arguments);
}
else if (Token::isUnaryOp(token) || Token::isCountOp(token))
if (Token::isUnaryOp(token) || Token::isCountOp(token))
{
// prefix expression
m_scanner->next();
@ -500,7 +490,17 @@ ASTPointer<Expression> Parser::parseUnaryExpression()
ASTPointer<Expression> Parser::parseLeftHandSideExpression()
{
ASTNodeFactory nodeFactory(*this);
ASTPointer<Expression> expression = parsePrimaryExpression();
ASTPointer<Expression> expression;
if (m_scanner->getCurrentToken() == Token::NEW)
{
expectToken(Token::NEW);
ASTPointer<Identifier> contractName = ASTNodeFactory(*this).createNode<Identifier>(expectIdentifierToken());
nodeFactory.markEndPosition();
expression = nodeFactory.createNode<NewExpression>(contractName);
}
else
expression = parsePrimaryExpression();
while (true)
{
switch (m_scanner->getCurrentToken())

3
Types.cpp
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@ -631,6 +631,7 @@ MemberList const& FunctionType::getMembers() const
switch (m_location)
{
case Location::EXTERNAL:
case Location::CREATION:
case Location::ECRECOVER:
case Location::SHA256:
case Location::RIPEMD160:
@ -644,6 +645,8 @@ MemberList const& FunctionType::getMembers() const
{"value", make_shared<FunctionType>(parseElementaryTypeVector({"uint"}),
TypePointers{copyAndSetGasOrValue(false, true)},
Location::SET_VALUE, m_gasSet, m_valueSet)}};
if (m_location == Location::CREATION)
members.erase("gas");
m_members.reset(new MemberList(members));
}
return *m_members;

4
Types.h
View File

@ -291,6 +291,8 @@ public:
virtual MemberList const& getMembers() const override;
ContractDefinition const& getContractDefinition() const { return m_contract; }
/// Returns the function type of the constructor. Note that the location part of the function type
/// is not used, as this type cannot be the type of a variable or expression.
std::shared_ptr<FunctionType const> const& getConstructorType() const;
@ -348,7 +350,7 @@ public:
/// INTERNAL: jump tag, EXTERNAL: contract address + function identifier,
/// BARE: contract address (non-abi contract call)
/// OTHERS: special virtual function, nothing on the stack
enum class Location { INTERNAL, EXTERNAL, SEND,
enum class Location { INTERNAL, EXTERNAL, CREATION, SEND,
SHA3, SUICIDE,
ECRECOVER, SHA256, RIPEMD160,
LOG0, LOG1, LOG2, LOG3, LOG4,

2
grammar.txt
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@ -33,7 +33,7 @@ Expression = Assignment | UnaryOperation | BinaryOperation | FunctionCall | NewE
// The expression syntax is actually much more complicated
Assignment = Expression (AssignmentOp Expression)
FunctionCall = Expression '(' Expression ( ',' Expression )* ')'
NewExpression = 'new' Identifier '(' ( Expression ( ',' Expression )* ) ')'
NewExpression = 'new' Identifier
MemberAccess = Expression '.' Identifier
IndexAccess = Expression '[' Expresison ']'
PrimaryExpression = Identifier | NumberLiteral | StringLiteral | ElementaryTypeName | '(' Expression ')'