2017-05-23 17:11:14 +00:00
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/*
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This file is part of solidity.
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solidity is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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solidity is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with solidity. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* Common code generator for translating Julia / inline assembly to EVM and EVM1.5.
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*/
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2017-05-24 16:34:19 +00:00
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#include <libjulia/backends/evm/EVMAssembly.h>
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2017-05-23 17:21:14 +00:00
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#include <libsolidity/inlineasm/AsmScope.h>
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2017-06-01 13:41:51 +00:00
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#include <libsolidity/inlineasm/AsmDataForward.h>
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2017-05-23 17:21:14 +00:00
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#include <boost/variant.hpp>
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2017-05-24 16:34:19 +00:00
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#include <boost/optional.hpp>
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2017-05-23 17:21:14 +00:00
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namespace dev
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{
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namespace solidity
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{
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2017-05-11 13:26:35 +00:00
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class ErrorReporter;
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2017-05-23 17:21:14 +00:00
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namespace assembly
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{
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struct AsmAnalysisInfo;
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}
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}
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namespace julia
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{
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2017-05-24 16:34:19 +00:00
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class EVMAssembly;
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class CodeTransform: public boost::static_visitor<>
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{
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public:
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/// Create the code transformer.
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2017-05-23 17:11:14 +00:00
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/// @param _identifierAccess used to resolve identifiers external to the inline assembly
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CodeTransform(
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julia::AbstractAssembly& _assembly,
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solidity::assembly::AsmAnalysisInfo& _analysisInfo,
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bool _evm15 = false,
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ExternalIdentifierAccess const& _identifierAccess = ExternalIdentifierAccess()
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2017-06-13 19:58:25 +00:00
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): CodeTransform(
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_assembly,
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_analysisInfo,
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_evm15,
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_identifierAccess,
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_assembly.stackHeight(),
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std::make_shared<Context>()
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)
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{
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}
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protected:
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2017-06-13 19:58:25 +00:00
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struct Context
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{
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2017-06-13 22:01:06 +00:00
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using Scope = solidity::assembly::Scope;
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std::map<Scope::Label const*, AbstractAssembly::LabelID> labelIDs;
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std::map<Scope::Function const*, AbstractAssembly::LabelID> functionEntryIDs;
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std::map<Scope::Variable const*, int> variableStackHeights;
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};
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2017-05-23 17:11:14 +00:00
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CodeTransform(
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julia::AbstractAssembly& _assembly,
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2017-05-23 17:21:14 +00:00
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solidity::assembly::AsmAnalysisInfo& _analysisInfo,
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bool _evm15,
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ExternalIdentifierAccess const& _identifierAccess,
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int _stackAdjustment,
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std::shared_ptr<Context> _context
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):
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m_assembly(_assembly),
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m_info(_analysisInfo),
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m_evm15(_evm15),
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m_identifierAccess(_identifierAccess),
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m_stackAdjustment(_stackAdjustment),
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m_context(_context)
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{}
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public:
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void operator()(solidity::assembly::Instruction const& _instruction);
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void operator()(solidity::assembly::Literal const& _literal);
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void operator()(solidity::assembly::Identifier const& _identifier);
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void operator()(solidity::assembly::FunctionalInstruction const& _instr);
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void operator()(solidity::assembly::FunctionCall const&);
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void operator()(solidity::assembly::Label const& _label);
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void operator()(solidity::assembly::StackAssignment const& _assignment);
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void operator()(solidity::assembly::Assignment const& _assignment);
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void operator()(solidity::assembly::VariableDeclaration const& _varDecl);
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void operator()(solidity::assembly::Switch const& _switch);
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void operator()(solidity::assembly::FunctionDefinition const&);
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2017-04-28 13:33:52 +00:00
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void operator()(solidity::assembly::ForLoop const&);
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void operator()(solidity::assembly::Block const& _block);
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2017-06-01 16:16:38 +00:00
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private:
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AbstractAssembly::LabelID labelFromIdentifier(solidity::assembly::Identifier const& _identifier);
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/// @returns the label ID corresponding to the given label, allocating a new one if
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/// necessary.
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AbstractAssembly::LabelID labelID(solidity::assembly::Scope::Label const& _label);
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AbstractAssembly::LabelID functionEntryID(solidity::assembly::Scope::Function const& _function);
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2017-05-24 16:34:19 +00:00
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/// Generates code for an expression that is supposed to return a single value.
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void visitExpression(solidity::assembly::Statement const& _expression);
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2017-05-23 17:11:14 +00:00
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2017-06-09 11:59:16 +00:00
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/// Pops all variables declared in the block and checks that the stack height is equal
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/// to @a _blackStartStackHeight.
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void finalizeBlock(solidity::assembly::Block const& _block, int _blockStartStackHeight);
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2017-06-06 13:37:43 +00:00
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void generateAssignment(solidity::assembly::Identifier const& _variableName);
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2017-05-23 17:11:14 +00:00
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2017-06-06 13:37:43 +00:00
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/// Determines the stack height difference to the given variables. Throws
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/// if it is not yet in scope or the height difference is too large. Returns
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/// the (positive) stack height difference otherwise.
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int variableHeightDiff(solidity::assembly::Scope::Variable const& _var, bool _forSwap);
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2017-05-23 17:11:14 +00:00
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2017-05-23 17:21:14 +00:00
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void expectDeposit(int _deposit, int _oldHeight);
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2017-05-23 17:11:14 +00:00
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2017-05-23 17:21:14 +00:00
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void checkStackHeight(void const* _astElement);
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julia::AbstractAssembly& m_assembly;
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solidity::assembly::AsmAnalysisInfo& m_info;
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2017-05-24 16:34:19 +00:00
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solidity::assembly::Scope* m_scope = nullptr;
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bool m_evm15 = false;
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2017-05-23 17:11:14 +00:00
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ExternalIdentifierAccess m_identifierAccess;
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2017-05-31 10:15:43 +00:00
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/// Adjustment between the stack height as determined during the analysis phase
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/// and the stack height in the assembly. This is caused by an initial stack being present
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/// for inline assembly and different stack heights depending on the EVM backend used
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/// (EVM 1.0 or 1.5).
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int m_stackAdjustment = 0;
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std::shared_ptr<Context> m_context;
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};
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}
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}
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