1 //===--- IncrementalExecutor.cpp - Incremental Execution --------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file implements the class which performs incremental code execution. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "IncrementalExecutor.h" 14 15 #include "llvm/ExecutionEngine/ExecutionEngine.h" 16 #include "llvm/ExecutionEngine/Orc/CompileUtils.h" 17 #include "llvm/ExecutionEngine/Orc/ExecutionUtils.h" 18 #include "llvm/ExecutionEngine/Orc/IRCompileLayer.h" 19 #include "llvm/ExecutionEngine/Orc/LLJIT.h" 20 #include "llvm/ExecutionEngine/Orc/RTDyldObjectLinkingLayer.h" 21 #include "llvm/ExecutionEngine/SectionMemoryManager.h" 22 #include "llvm/IR/Module.h" 23 #include "llvm/Support/ManagedStatic.h" 24 #include "llvm/Support/TargetSelect.h" 25 26 namespace clang { 27 28 IncrementalExecutor::IncrementalExecutor(llvm::orc::ThreadSafeContext &TSC, 29 llvm::Error &Err) 30 : TSCtx(TSC) { 31 using namespace llvm::orc; 32 llvm::ErrorAsOutParameter EAO(&Err); 33 34 if (auto JitOrErr = LLJITBuilder().create()) 35 Jit = std::move(*JitOrErr); 36 else { 37 Err = JitOrErr.takeError(); 38 return; 39 } 40 41 const char Pref = Jit->getDataLayout().getGlobalPrefix(); 42 // Discover symbols from the process as a fallback. 43 if (auto PSGOrErr = DynamicLibrarySearchGenerator::GetForCurrentProcess(Pref)) 44 Jit->getMainJITDylib().addGenerator(std::move(*PSGOrErr)); 45 else { 46 Err = PSGOrErr.takeError(); 47 return; 48 } 49 } 50 51 IncrementalExecutor::~IncrementalExecutor() {} 52 53 llvm::Error IncrementalExecutor::addModule(std::unique_ptr<llvm::Module> M) { 54 return Jit->addIRModule(llvm::orc::ThreadSafeModule(std::move(M), TSCtx)); 55 } 56 57 llvm::Error IncrementalExecutor::runCtors() const { 58 return Jit->initialize(Jit->getMainJITDylib()); 59 } 60 61 } // end namespace clang 62