106 lines
3.7 KiB
C++
106 lines
3.7 KiB
C++
//===----- CompileOnDemandLayer.cpp - Lazily emit IR on first call --------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ExecutionEngine/Orc/CompileOnDemandLayer.h"
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#include "llvm/ExecutionEngine/Orc/Layer.h"
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#include "llvm/IR/Module.h"
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using namespace llvm;
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using namespace llvm::orc;
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CompileOnDemandLayer::CompileOnDemandLayer(
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ExecutionSession &ES, IRLayer &BaseLayer, LazyCallThroughManager &LCTMgr,
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IndirectStubsManagerBuilder BuildIndirectStubsManager)
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: IRLayer(ES, BaseLayer.getManglingOptions()), BaseLayer(BaseLayer),
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LCTMgr(LCTMgr),
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BuildIndirectStubsManager(std::move(BuildIndirectStubsManager)) {}
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void CompileOnDemandLayer::setImplMap(ImplSymbolMap *Imp) {
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this->AliaseeImpls = Imp;
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}
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void CompileOnDemandLayer::emit(
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std::unique_ptr<MaterializationResponsibility> R, ThreadSafeModule TSM) {
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assert(TSM && "Null module");
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auto &ES = getExecutionSession();
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// Sort the callables and non-callables, build re-exports and lodge the
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// actual module with the implementation dylib.
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auto &PDR = getPerDylibResources(R->getTargetJITDylib());
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SymbolAliasMap NonCallables;
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SymbolAliasMap Callables;
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for (auto &KV : R->getSymbols()) {
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auto &Name = KV.first;
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auto &Flags = KV.second;
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if (Flags.isCallable())
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Callables[Name] = SymbolAliasMapEntry(Name, Flags);
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else
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NonCallables[Name] = SymbolAliasMapEntry(Name, Flags);
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}
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// Lodge symbols with the implementation dylib.
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if (auto Err = PDR.getImplDylib().define(
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std::make_unique<BasicIRLayerMaterializationUnit>(
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BaseLayer, *getManglingOptions(), std::move(TSM)))) {
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ES.reportError(std::move(Err));
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R->failMaterialization();
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return;
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}
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if (!NonCallables.empty())
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if (auto Err =
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R->replace(reexports(PDR.getImplDylib(), std::move(NonCallables),
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JITDylibLookupFlags::MatchAllSymbols))) {
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getExecutionSession().reportError(std::move(Err));
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R->failMaterialization();
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return;
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}
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if (!Callables.empty()) {
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if (auto Err = R->replace(
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lazyReexports(LCTMgr, PDR.getISManager(), PDR.getImplDylib(),
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std::move(Callables), AliaseeImpls))) {
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getExecutionSession().reportError(std::move(Err));
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R->failMaterialization();
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return;
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}
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}
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}
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CompileOnDemandLayer::PerDylibResources &
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CompileOnDemandLayer::getPerDylibResources(JITDylib &TargetD) {
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std::lock_guard<std::mutex> Lock(CODLayerMutex);
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auto I = DylibResources.find(&TargetD);
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if (I == DylibResources.end()) {
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auto &ImplD =
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getExecutionSession().createBareJITDylib(TargetD.getName() + ".impl");
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JITDylibSearchOrder NewLinkOrder;
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TargetD.withLinkOrderDo([&](const JITDylibSearchOrder &TargetLinkOrder) {
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NewLinkOrder = TargetLinkOrder;
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});
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assert(!NewLinkOrder.empty() && NewLinkOrder.front().first == &TargetD &&
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NewLinkOrder.front().second ==
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JITDylibLookupFlags::MatchAllSymbols &&
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"TargetD must be at the front of its own search order and match "
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"non-exported symbol");
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NewLinkOrder.insert(std::next(NewLinkOrder.begin()),
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{&ImplD, JITDylibLookupFlags::MatchAllSymbols});
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ImplD.setLinkOrder(NewLinkOrder, false);
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TargetD.setLinkOrder(std::move(NewLinkOrder), false);
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PerDylibResources PDR(ImplD, BuildIndirectStubsManager());
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I = DylibResources.insert(std::make_pair(&TargetD, std::move(PDR))).first;
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}
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return I->second;
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}
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