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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/Debugging/DebuggerSupport.h"
#include "llvm/ExecutionEngine/Orc/ExecutionUtils.h"
#include "llvm/ExecutionEngine/Orc/IRCompileLayer.h"
#include "llvm/ExecutionEngine/Orc/JITTargetMachineBuilder.h"
#include "llvm/ExecutionEngine/Orc/LLJIT.h"
#include "llvm/ExecutionEngine/Orc/RTDyldObjectLinkingLayer.h"
#include "llvm/ExecutionEngine/Orc/TargetProcess/JITLoaderGDB.h"
#include "llvm/ExecutionEngine/SectionMemoryManager.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/TargetSelect.h"
// Force linking some of the runtimes that helps attaching to a debugger.
LLVM_ATTRIBUTE_USED void linkComponents() {
llvm::errs() << (void *)&llvm_orc_registerJITLoaderGDBWrapper
<< (void *)&llvm_orc_registerJITLoaderGDBAllocAction;
}
namespace clang {
IncrementalExecutor::IncrementalExecutor(llvm::orc::ThreadSafeContext &TSC)
: TSCtx(TSC) {}
llvm::Expected<std::unique_ptr<llvm::orc::LLJITBuilder>>
IncrementalExecutor::createDefaultJITBuilder(
llvm::orc::JITTargetMachineBuilder JTMB) {
auto JITBuilder = std::make_unique<llvm::orc::LLJITBuilder>();
JITBuilder->setJITTargetMachineBuilder(std::move(JTMB));
JITBuilder->setPrePlatformSetup([](llvm::orc::LLJIT &J) {
// Try to enable debugging of JIT'd code (only works with JITLink for
// ELF and MachO).
consumeError(llvm::orc::enableDebuggerSupport(J));
return llvm::Error::success();
});
return std::move(JITBuilder);
}
IncrementalExecutor::IncrementalExecutor(llvm::orc::ThreadSafeContext &TSC,
llvm::orc::LLJITBuilder &JITBuilder,
llvm::Error &Err)
: TSCtx(TSC) {
using namespace llvm::orc;
llvm::ErrorAsOutParameter EAO(&Err);
if (auto JitOrErr = JITBuilder.create())
Jit = std::move(*JitOrErr);
else {
Err = JitOrErr.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();
}
// Clean up the JIT instance.
llvm::Error IncrementalExecutor::cleanUp() {
// This calls the global dtors of registered modules.
return Jit->deinitialize(Jit->getMainJITDylib());
}
llvm::Error IncrementalExecutor::runCtors() const {
return Jit->initialize(Jit->getMainJITDylib());
}
llvm::Expected<llvm::orc::ExecutorAddr>
IncrementalExecutor::getSymbolAddress(llvm::StringRef Name,
SymbolNameKind NameKind) const {
using namespace llvm::orc;
auto SO = makeJITDylibSearchOrder({&Jit->getMainJITDylib(),
Jit->getPlatformJITDylib().get(),
Jit->getProcessSymbolsJITDylib().get()});
ExecutionSession &ES = Jit->getExecutionSession();
auto SymOrErr =
ES.lookup(SO, (NameKind == LinkerName) ? ES.intern(Name)
: Jit->mangleAndIntern(Name));
if (auto Err = SymOrErr.takeError())
return std::move(Err);
return SymOrErr->getAddress();
}
} // namespace clang
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