60 lines
2.1 KiB
C++
60 lines
2.1 KiB
C++
//===- LazyObjectLinkingLayer.h - Link objects on first fn call -*- C++ -*-===//
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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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//
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// Link object files lazily on first call.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_EXECUTIONENGINE_ORC_LAZYOBJECTLINKINGLAYER_H
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#define LLVM_EXECUTIONENGINE_ORC_LAZYOBJECTLINKINGLAYER_H
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#include "llvm/ExecutionEngine/Orc/Core.h"
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#include "llvm/ExecutionEngine/Orc/Layer.h"
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#include "llvm/Support/Compiler.h"
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namespace llvm::orc {
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class ObjectLinkingLayer;
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class LazyReexportsManager;
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class RedirectableSymbolManager;
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/// LazyObjectLinkingLayer is an adapter for ObjectLinkingLayer that builds
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/// lazy reexports for all function symbols in objects that are/ added to defer
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/// linking until the first call to a function defined in the object.
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///
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/// Linking is performed by emitting the object file via the base
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/// ObjectLinkingLayer.
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///
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/// No partitioning is performed: The first call to any function in the object
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/// will trigger linking of the whole object.
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///
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/// References to data symbols are not lazy and will trigger immediate linking
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/// (same os ObjectlinkingLayer).
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class LLVM_ABI LazyObjectLinkingLayer : public ObjectLayer {
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public:
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LazyObjectLinkingLayer(ObjectLinkingLayer &BaseLayer,
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LazyReexportsManager &LRMgr);
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/// Add an object file to the JITDylib targeted by the given tracker.
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llvm::Error add(llvm::orc::ResourceTrackerSP RT,
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std::unique_ptr<MemoryBuffer> O,
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MaterializationUnit::Interface I) override;
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void emit(std::unique_ptr<MaterializationResponsibility> R,
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std::unique_ptr<MemoryBuffer> O) override;
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private:
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class RenamerPlugin;
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ObjectLinkingLayer &BaseLayer;
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LazyReexportsManager &LRMgr;
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};
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} // namespace llvm::orc
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#endif // LLVM_EXECUTIONENGINE_ORC_LAZYOBJECTLINKINGLAYER_H
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