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//===--- IncrementalExecutor.cpp - Incremental Execution --------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file implements the class which performs incremental code execution.
//
//===----------------------------------------------------------------------===//
#include "IncrementalExecutor.h"
#include "clang/Basic/TargetInfo.h"
#include "clang/Basic/TargetOptions.h"
#include "clang/Interpreter/PartialTranslationUnit.h"
#include "llvm/ExecutionEngine/ExecutionEngine.h"
#include "llvm/ExecutionEngine/Orc/CompileUtils.h"
#include "llvm/ExecutionEngine/Orc/ExecutionUtils.h"
#include "llvm/ExecutionEngine/Orc/IRCompileLayer.h"
#include "llvm/ExecutionEngine/Orc/LLJIT.h"
#include "llvm/ExecutionEngine/Orc/RTDyldObjectLinkingLayer.h"
#include "llvm/ExecutionEngine/SectionMemoryManager.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/TargetSelect.h"
namespace clang {
IncrementalExecutor::IncrementalExecutor(llvm::orc::ThreadSafeContext &TSC,
llvm::Error &Err,
const clang::TargetInfo &TI)
: TSCtx(TSC) {
using namespace llvm::orc;
llvm::ErrorAsOutParameter EAO(&Err);
auto JTMB = JITTargetMachineBuilder(TI.getTriple());
JTMB.addFeatures(TI.getTargetOpts().Features);
if (auto JitOrErr = LLJITBuilder().setJITTargetMachineBuilder(JTMB).create())
Jit = std::move(*JitOrErr);
else {
Err = JitOrErr.takeError();
return;
}
const char Pref = Jit->getDataLayout().getGlobalPrefix();
// Discover symbols from the process as a fallback.
if (auto PSGOrErr = DynamicLibrarySearchGenerator::GetForCurrentProcess(Pref))
Jit->getMainJITDylib().addGenerator(std::move(*PSGOrErr));
else {
Err = PSGOrErr.takeError();
return;
}
}
IncrementalExecutor::~IncrementalExecutor() {}
llvm::Error IncrementalExecutor::addModule(PartialTranslationUnit &PTU) {
llvm::orc::ResourceTrackerSP RT =
Jit->getMainJITDylib().createResourceTracker();
ResourceTrackers[&PTU] = RT;
return Jit->addIRModule(RT, {std::move(PTU.TheModule), TSCtx});
}
llvm::Error IncrementalExecutor::removeModule(PartialTranslationUnit &PTU) {
llvm::orc::ResourceTrackerSP RT = std::move(ResourceTrackers[&PTU]);
if (!RT)
return llvm::Error::success();
ResourceTrackers.erase(&PTU);
if (llvm::Error Err = RT->remove())
return Err;
return llvm::Error::success();
}
llvm::Error IncrementalExecutor::runCtors() const {
return Jit->initialize(Jit->getMainJITDylib());
}
llvm::Expected<llvm::JITTargetAddress>
IncrementalExecutor::getSymbolAddress(llvm::StringRef Name,
SymbolNameKind NameKind) const {
auto Sym = (NameKind == LinkerName) ? Jit->lookupLinkerMangled(Name)
: Jit->lookup(Name);
if (!Sym)
return Sym.takeError();
return Sym->getValue();
}
} // end namespace clang