mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
282 lines
8.3 KiB
C++
282 lines
8.3 KiB
C++
/*
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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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* Full assembly stack that can support EVM-assembly and Yul as input and EVM, EVM1.5 and
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* Ewasm as output.
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*/
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#include <libyul/AssemblyStack.h>
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#include <libyul/AsmAnalysis.h>
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#include <libyul/AsmAnalysisInfo.h>
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#include <libyul/AsmParser.h>
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#include <libyul/AsmPrinter.h>
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#include <libyul/backends/evm/AsmCodeGen.h>
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#include <libyul/backends/evm/EVMAssembly.h>
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#include <libyul/backends/evm/EVMCodeTransform.h>
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#include <libyul/backends/evm/EVMDialect.h>
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#include <libyul/backends/evm/EVMObjectCompiler.h>
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#include <libyul/backends/evm/EVMMetrics.h>
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#include <libyul/backends/wasm/WasmDialect.h>
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#include <libyul/backends/wasm/WasmObjectCompiler.h>
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#include <libyul/backends/wasm/EVMToEwasmTranslator.h>
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#include <libyul/optimiser/Metrics.h>
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#include <libyul/ObjectParser.h>
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#include <libyul/optimiser/Suite.h>
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#include <libsolidity/interface/OptimiserSettings.h>
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#include <libevmasm/Assembly.h>
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#include <liblangutil/Scanner.h>
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using namespace std;
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using namespace solidity;
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using namespace solidity::yul;
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using namespace solidity::langutil;
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namespace
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{
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Dialect const& languageToDialect(AssemblyStack::Language _language, EVMVersion _version)
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{
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switch (_language)
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{
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case AssemblyStack::Language::Assembly:
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case AssemblyStack::Language::StrictAssembly:
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return EVMDialect::strictAssemblyForEVMObjects(_version);
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case AssemblyStack::Language::Yul:
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return EVMDialectTyped::instance(_version);
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case AssemblyStack::Language::Ewasm:
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return WasmDialect::instance();
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}
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yulAssert(false, "");
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return Dialect::yulDeprecated();
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}
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}
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Scanner const& AssemblyStack::scanner() const
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{
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yulAssert(m_scanner, "");
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return *m_scanner;
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}
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bool AssemblyStack::parseAndAnalyze(std::string const& _sourceName, std::string const& _source)
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{
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m_errors.clear();
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m_analysisSuccessful = false;
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m_scanner = make_shared<Scanner>(CharStream(_source, _sourceName));
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m_parserResult = ObjectParser(m_errorReporter, languageToDialect(m_language, m_evmVersion)).parse(m_scanner, false);
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if (!m_errorReporter.errors().empty())
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return false;
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yulAssert(m_parserResult, "");
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yulAssert(m_parserResult->code, "");
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return analyzeParsed();
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}
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void AssemblyStack::optimize()
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{
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if (!m_optimiserSettings.runYulOptimiser)
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return;
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yulAssert(m_analysisSuccessful, "Analysis was not successful.");
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m_analysisSuccessful = false;
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yulAssert(m_parserResult, "");
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optimize(*m_parserResult, true);
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yulAssert(analyzeParsed(), "Invalid source code after optimization.");
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}
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void AssemblyStack::translate(AssemblyStack::Language _targetLanguage)
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{
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if (m_language == _targetLanguage)
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return;
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solAssert(
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m_language == Language::StrictAssembly && _targetLanguage == Language::Ewasm,
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"Invalid language combination"
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);
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*m_parserResult = EVMToEwasmTranslator(
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languageToDialect(m_language, m_evmVersion)
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).run(*parserResult());
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m_language = _targetLanguage;
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}
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bool AssemblyStack::analyzeParsed()
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{
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yulAssert(m_parserResult, "");
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m_analysisSuccessful = analyzeParsed(*m_parserResult);
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return m_analysisSuccessful;
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}
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bool AssemblyStack::analyzeParsed(Object& _object)
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{
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yulAssert(_object.code, "");
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_object.analysisInfo = make_shared<AsmAnalysisInfo>();
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AsmAnalyzer analyzer(
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*_object.analysisInfo,
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m_errorReporter,
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languageToDialect(m_language, m_evmVersion),
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{},
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_object.dataNames()
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);
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bool success = analyzer.analyze(*_object.code);
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for (auto& subNode: _object.subObjects)
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if (auto subObject = dynamic_cast<Object*>(subNode.get()))
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if (!analyzeParsed(*subObject))
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success = false;
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return success;
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}
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void AssemblyStack::compileEVM(AbstractAssembly& _assembly, bool _evm15, bool _optimize) const
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{
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EVMDialect const* dialect = nullptr;
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switch (m_language)
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{
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case Language::Assembly:
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case Language::StrictAssembly:
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dialect = &EVMDialect::strictAssemblyForEVMObjects(m_evmVersion);
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break;
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case Language::Yul:
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dialect = &EVMDialectTyped::instance(m_evmVersion);
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break;
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default:
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solAssert(false, "Invalid language.");
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break;
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}
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EVMObjectCompiler::compile(*m_parserResult, _assembly, *dialect, _evm15, _optimize);
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}
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void AssemblyStack::optimize(Object& _object, bool _isCreation)
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{
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yulAssert(_object.code, "");
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yulAssert(_object.analysisInfo, "");
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for (auto& subNode: _object.subObjects)
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if (auto subObject = dynamic_cast<Object*>(subNode.get()))
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optimize(*subObject, false);
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Dialect const& dialect = languageToDialect(m_language, m_evmVersion);
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unique_ptr<GasMeter> meter;
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if (EVMDialect const* evmDialect = dynamic_cast<EVMDialect const*>(&dialect))
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meter = make_unique<GasMeter>(*evmDialect, _isCreation, m_optimiserSettings.expectedExecutionsPerDeployment);
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OptimiserSuite::run(
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dialect,
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meter.get(),
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_object,
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m_optimiserSettings.optimizeStackAllocation,
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m_optimiserSettings.yulOptimiserSteps
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);
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}
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MachineAssemblyObject AssemblyStack::assemble(Machine _machine) const
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{
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yulAssert(m_analysisSuccessful, "");
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yulAssert(m_parserResult, "");
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yulAssert(m_parserResult->code, "");
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yulAssert(m_parserResult->analysisInfo, "");
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switch (_machine)
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{
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case Machine::EVM:
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return assembleAndGuessRuntime().first;
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case Machine::EVM15:
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{
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MachineAssemblyObject object;
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EVMAssembly assembly(true);
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compileEVM(assembly, true, m_optimiserSettings.optimizeStackAllocation);
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object.bytecode = make_shared<evmasm::LinkerObject>(assembly.finalize());
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/// TODO: fill out text representation
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return object;
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}
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case Machine::Ewasm:
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{
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yulAssert(m_language == Language::Ewasm, "");
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Dialect const& dialect = languageToDialect(m_language, EVMVersion{});
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MachineAssemblyObject object;
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auto result = WasmObjectCompiler::compile(*m_parserResult, dialect);
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object.assembly = std::move(result.first);
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object.bytecode = make_shared<evmasm::LinkerObject>();
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object.bytecode->bytecode = std::move(result.second);
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return object;
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}
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}
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// unreachable
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return MachineAssemblyObject();
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}
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pair<MachineAssemblyObject, MachineAssemblyObject> AssemblyStack::assembleAndGuessRuntime() const
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{
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yulAssert(m_analysisSuccessful, "");
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yulAssert(m_parserResult, "");
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yulAssert(m_parserResult->code, "");
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yulAssert(m_parserResult->analysisInfo, "");
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evmasm::Assembly assembly;
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EthAssemblyAdapter adapter(assembly);
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compileEVM(adapter, false, m_optimiserSettings.optimizeStackAllocation);
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MachineAssemblyObject creationObject;
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creationObject.bytecode = make_shared<evmasm::LinkerObject>(assembly.assemble());
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yulAssert(creationObject.bytecode->immutableReferences.empty(), "Leftover immutables.");
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creationObject.assembly = assembly.assemblyString();
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creationObject.sourceMappings = make_unique<string>(
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evmasm::AssemblyItem::computeSourceMapping(
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assembly.items(),
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{{scanner().charStream() ? scanner().charStream()->name() : "", 0}}
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)
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);
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MachineAssemblyObject runtimeObject;
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// Heuristic: If there is a single sub-assembly, this is likely the runtime object.
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if (assembly.numSubs() == 1)
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{
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evmasm::Assembly& runtimeAssembly = assembly.sub(0);
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runtimeObject.bytecode = make_shared<evmasm::LinkerObject>(runtimeAssembly.assemble());
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runtimeObject.assembly = runtimeAssembly.assemblyString();
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runtimeObject.sourceMappings = make_unique<string>(
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evmasm::AssemblyItem::computeSourceMapping(
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runtimeAssembly.items(),
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{{scanner().charStream() ? scanner().charStream()->name() : "", 0}}
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)
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);
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}
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return {std::move(creationObject), std::move(runtimeObject)};
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}
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string AssemblyStack::print() const
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{
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yulAssert(m_parserResult, "");
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yulAssert(m_parserResult->code, "");
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return m_parserResult->toString(&languageToDialect(m_language, m_evmVersion)) + "\n";
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}
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shared_ptr<Object> AssemblyStack::parserResult() const
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{
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yulAssert(m_analysisSuccessful, "Analysis was not successful.");
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yulAssert(m_parserResult, "");
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yulAssert(m_parserResult->code, "");
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return m_parserResult;
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}
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