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/***************************************************Project Mutator****************************************************/
//-*-c++-*-
/*first line intentionally left blank.*/
/*a second way of running the mutants. experimental.*/
/*Copyright (C) 2017 Farzad Sadeghi
This program 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.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.*/
/*code structure inspired by Eli Bendersky's tutorial on Rewriters.*/
/**********************************************************************************************************************/
/*inclusion guard*/
#ifndef ORC_MUTATION_H
#define ORC_MUTATION_H
//#if __clang_major__ >= 5
#if 0
/**********************************************************************************************************************/
/*included modules*/
/*project headers*/
/*standard library headers*/
#include <vector>
/*clang headers*/
/*llvm headers*/
#include "llvm/ExecutionEngine/SectionMemoryManager.h"
#include "llvm/ExecutionEngine/ExecutionEngine.h"
#include "llvm/ExecutionEngine/JITSymbol.h"
#include "llvm/ExecutionEngine/RTDyldMemoryManager.h"
#include "llvm/ExecutionEngine/SectionMemoryManager.h"
#include "llvm/ExecutionEngine/Orc/CompileUtils.h"
#include "llvm/ExecutionEngine/Orc/IRCompileLayer.h"
#include "llvm/ExecutionEngine/Orc/IRTransformLayer.h"
#include "llvm/ExecutionEngine/Orc/LambdaResolver.h"
#include "llvm/ExecutionEngine/Orc/RTDyldObjectLinkingLayer.h"
#include "llvm/ExecutionEngine/Orc/CompileOnDemandLayer.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/Mangler.h"
#include "llvm/IR/LegacyPassManager.h"
#include "llvm/Support/DynamicLibrary.h"
#include "llvm/Transforms/Scalar.h"
#include "llvm/Transforms/Scalar/GVN.h"
/**********************************************************************************************************************/
/*using*/
using namespace llvm;
/**********************************************************************************************************************/
/*globals*/
/**********************************************************************************************************************/
namespace mutatorjit{
class MutatorJIT
{
private:
std::unique_ptr<TargetMachine> TM;
const DataLayout DL;
std::unique_ptr<orc::JITCompileCallbackManager> CompileCallbackManager;
orc::RTDyldObjectLinkingLayer ObjectLayer;
orc::IRCompileLayer<decltype(ObjectLayer), orc::SimpleCompiler> CompileLayer;
using OptimizeFunction = std::function<std::shared_ptr<llvm::Module>(std::shared_ptr<llvm::Module>)>;
orc::IRTransformLayer<decltype(CompileLayer), OptimizeFunction> OptimizeLayer;
//orc::CompileOnDemandLayer<decltype(OptimizeLayer)> CODL;
public:
using ModuleHandle = decltype(OptimizeLayer)::ModuleHandleT;
MutatorJIT() : TM(EngineBuilder().selectTarget()), DL(TM->createDataLayout()), \
ObjectLayer([]() {return std::make_shared<SectionMemoryManager>();}),\
CompileLayer(ObjectLayer, orc::SimpleCompiler(*TM)), \
OptimizeLayer(CompileLayer, [this](std::shared_ptr<llvm::Module> M){return optimizeModule(std::move(M));})
{
llvm::sys::DynamicLibrary::LoadLibraryPermanently(nullptr);
}
TargetMachine &getTargetMachine()
{
return *TM;
}
ModuleHandle addModule(std::unique_ptr<llvm::Module> M)
{
auto Resolver = orc::createLambdaResolver
(
[&](const std::string &Name)
{
if (auto Sym = OptimizeLayer.findSymbol(Name, false))
{
return Sym;
}
else
{
return JITSymbol(nullptr);
}
},
[](const std::string &Name)
{
if (auto SymAddr = RTDyldMemoryManager::getSymbolAddressInProcess(Name))
{
return JITSymbol(SymAddr, JITSymbolFlags::Exported);
}
else
{
return JITSymbol(nullptr);
}
}
);
return cantFail(OptimizeLayer.addModule(std::move(M), std::move(Resolver)));
}
JITSymbol findSymbol(const std::string Name)
{
std::string MangledName;
raw_string_ostream MangledNameStream(MangledName);
Mangler::getNameWithPrefix(MangledNameStream, Name, DL);
return OptimizeLayer.findSymbol(MangledNameStream.str(), true);
}
void removeModule(ModuleHandle H)
{
cantFail(OptimizeLayer.removeModule(H));
}
private:
std::shared_ptr<llvm::Module> optimizeModule(std::shared_ptr<llvm::Module> M)
{
auto FPM = llvm::make_unique<legacy::FunctionPassManager>(M.get());
FPM->add(createInstructionCombiningPass());
FPM->add(createReassociatePass());
FPM->add(createGVNPass());
FPM->add(createCFGSimplificationPass());
FPM->doInitialization();
for (auto &F : *M)
{
FPM->run(F);
}
return M;
}
};
class runMainOnJit
{
#if 1
std::unique_ptr<llvm::Module> M = buildModule();
MutatorJIT jit;
Handle H = jit.addModule(*M);
int (*Main)(int, char*[]) =
(int(*)(int*, char*[]))jit.findSymbol("main").getSymbolAddressInProcess();
int result = Main();
jit.removeModule(H);
#endif
};
} //end of namespace mutatorjit
/**********************************************************************************************************************/
/**********************************************************************************************************************/
/**********************************************************************************************************************/
/**********************************************************************************************************************/
#endif
#endif
/*last line intentionally left blank*/
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