mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
136 lines
4.6 KiB
C++
136 lines
4.6 KiB
C++
/*
|
|
This file is part of solidity.
|
|
|
|
solidity is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
solidity is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with solidity. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
/**
|
|
* Common code generator for translating Julia / inline assembly to EVM and EVM1.5.
|
|
*/
|
|
|
|
#include <libjulia/backends/evm/EVMAssembly.h>
|
|
|
|
#include <libsolidity/inlineasm/AsmScope.h>
|
|
|
|
#include <boost/variant.hpp>
|
|
#include <boost/optional.hpp>
|
|
|
|
namespace dev
|
|
{
|
|
namespace solidity
|
|
{
|
|
class ErrorReporter;
|
|
namespace assembly
|
|
{
|
|
struct Literal;
|
|
struct Block;
|
|
struct Switch;
|
|
struct Label;
|
|
struct FunctionalInstruction;
|
|
struct Assignment;
|
|
struct VariableDeclaration;
|
|
struct Instruction;
|
|
struct Identifier;
|
|
struct StackAssignment;
|
|
struct FunctionDefinition;
|
|
struct FunctionCall;
|
|
|
|
using Statement = boost::variant<Instruction, Literal, Label, StackAssignment, Identifier, Assignment, FunctionCall, FunctionalInstruction, VariableDeclaration, FunctionDefinition, Switch, Block>;
|
|
|
|
struct AsmAnalysisInfo;
|
|
}
|
|
}
|
|
namespace julia
|
|
{
|
|
class EVMAssembly;
|
|
|
|
class CodeTransform: public boost::static_visitor<>
|
|
{
|
|
public:
|
|
/// Create the code transformer.
|
|
/// @param _identifierAccess used to resolve identifiers external to the inline assembly
|
|
CodeTransform(
|
|
julia::AbstractAssembly& _assembly,
|
|
solidity::assembly::AsmAnalysisInfo& _analysisInfo,
|
|
bool _evm15 = false,
|
|
ExternalIdentifierAccess const& _identifierAccess = ExternalIdentifierAccess()
|
|
): CodeTransform(_assembly, _analysisInfo, _evm15, _identifierAccess, _assembly.stackHeight())
|
|
{
|
|
}
|
|
|
|
/// Processes the block and appends the resulting code to the assembly.
|
|
void run(solidity::assembly::Block const& _block);
|
|
|
|
protected:
|
|
CodeTransform(
|
|
julia::AbstractAssembly& _assembly,
|
|
solidity::assembly::AsmAnalysisInfo& _analysisInfo,
|
|
bool _evm15,
|
|
ExternalIdentifierAccess const& _identifierAccess,
|
|
int _stackAdjustment
|
|
):
|
|
m_assembly(_assembly),
|
|
m_info(_analysisInfo),
|
|
m_evm15(_evm15),
|
|
m_identifierAccess(_identifierAccess),
|
|
m_stackAdjustment(_stackAdjustment)
|
|
{}
|
|
|
|
public:
|
|
void operator()(solidity::assembly::Instruction const& _instruction);
|
|
void operator()(solidity::assembly::Literal const& _literal);
|
|
void operator()(solidity::assembly::Identifier const& _identifier);
|
|
void operator()(solidity::assembly::FunctionalInstruction const& _instr);
|
|
void operator()(solidity::assembly::FunctionCall const&);
|
|
void operator()(solidity::assembly::Label const& _label);
|
|
void operator()(solidity::assembly::StackAssignment const& _assignment);
|
|
void operator()(solidity::assembly::Assignment const& _assignment);
|
|
void operator()(solidity::assembly::VariableDeclaration const& _varDecl);
|
|
void operator()(solidity::assembly::Switch const& _switch);
|
|
void operator()(solidity::assembly::FunctionDefinition const&);
|
|
void operator()(solidity::assembly::Block const& _block);
|
|
|
|
private:
|
|
AbstractAssembly::LabelID labelFromIdentifier(solidity::assembly::Identifier const& _identifier);
|
|
/// Generates code for an expression that is supposed to return a single value.
|
|
void visitExpression(solidity::assembly::Statement const& _expression);
|
|
|
|
void generateAssignment(solidity::assembly::Identifier const& _variableName);
|
|
|
|
/// Determines the stack height difference to the given variables. Throws
|
|
/// if it is not yet in scope or the height difference is too large. Returns
|
|
/// the (positive) stack height difference otherwise.
|
|
int variableHeightDiff(solidity::assembly::Scope::Variable const& _var, bool _forSwap);
|
|
|
|
void expectDeposit(int _deposit, int _oldHeight);
|
|
|
|
void checkStackHeight(void const* _astElement);
|
|
|
|
/// Assigns the label's or function's id to a value taken from eth::Assembly if it has not yet been set.
|
|
void assignLabelIdIfUnset(boost::optional<AbstractAssembly::LabelID>& _labelId);
|
|
|
|
julia::AbstractAssembly& m_assembly;
|
|
solidity::assembly::AsmAnalysisInfo& m_info;
|
|
solidity::assembly::Scope* m_scope = nullptr;
|
|
bool m_evm15 = false;
|
|
ExternalIdentifierAccess m_identifierAccess;
|
|
/// Adjustment between the stack height as determined during the analysis phase
|
|
/// and the stack height in the assembly. This is caused by an initial stack being present
|
|
/// for inline assembly and different stack heights depending on the EVM backend used
|
|
/// (EVM 1.0 or 1.5).
|
|
int m_stackAdjustment = 0;
|
|
};
|
|
|
|
}
|
|
}
|