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fb51095c4b
Summary: This is a utility for clients that want to insert a layer that modifies each ObjectFile and then passes it along to the next layer. Reviewers: lhames Reviewed By: lhames Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D10456 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240640 91177308-0d34-0410-b5e6-96231b3b80d8
113 lines
4.4 KiB
C++
113 lines
4.4 KiB
C++
//===- ObjectTransformLayer.h - Run all objects through functor -*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Run all objects passed in through a user supplied functor.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_EXECUTIONENGINE_ORC_OBJECTTRANSFORMLAYER_H
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#define LLVM_EXECUTIONENGINE_ORC_OBJECTTRANSFORMLAYER_H
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#include "JITSymbol.h"
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namespace llvm {
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namespace orc {
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/// @brief Object mutating layer.
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///
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/// This layer accepts sets of ObjectFiles (via addObjectSet). It
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/// immediately applies the user supplied functor to each object, then adds
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/// the set of transformed objects to the layer below.
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template <typename BaseLayerT, typename TransformFtor>
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class ObjectTransformLayer {
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public:
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/// @brief Handle to a set of added objects.
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typedef typename BaseLayerT::ObjSetHandleT ObjSetHandleT;
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/// @brief Construct an ObjectTransformLayer with the given BaseLayer
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ObjectTransformLayer(BaseLayerT &BaseLayer,
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TransformFtor Transform = TransformFtor())
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: BaseLayer(BaseLayer), Transform(std::move(Transform)) {}
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/// @brief Apply the transform functor to each object in the object set, then
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/// add the resulting set of objects to the base layer, along with the
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/// memory manager and symbol resolver.
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///
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/// @return A handle for the added objects.
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template <typename ObjSetT, typename MemoryManagerPtrT,
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typename SymbolResolverPtrT>
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ObjSetHandleT addObjectSet(ObjSetT &Objects, MemoryManagerPtrT MemMgr,
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SymbolResolverPtrT Resolver) {
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for (auto I = Objects.begin(), E = Objects.end(); I != E; ++I)
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*I = Transform(std::move(*I));
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return BaseLayer.addObjectSet(Objects, std::move(MemMgr),
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std::move(Resolver));
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}
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/// @brief Remove the object set associated with the handle H.
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void removeObjectSet(ObjSetHandleT H) { BaseLayer.removeObjectSet(H); }
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/// @brief Search for the given named symbol.
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/// @param Name The name of the symbol to search for.
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/// @param ExportedSymbolsOnly If true, search only for exported symbols.
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/// @return A handle for the given named symbol, if it exists.
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JITSymbol findSymbol(const std::string &Name, bool ExportedSymbolsOnly) {
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return BaseLayer.findSymbol(Name, ExportedSymbolsOnly);
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}
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/// @brief Get the address of the given symbol in the context of the set of
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/// objects represented by the handle H. This call is forwarded to the
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/// base layer's implementation.
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/// @param H The handle for the object set to search in.
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/// @param Name The name of the symbol to search for.
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/// @param ExportedSymbolsOnly If true, search only for exported symbols.
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/// @return A handle for the given named symbol, if it is found in the
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/// given object set.
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JITSymbol findSymbolIn(ObjSetHandleT H, const std::string &Name,
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bool ExportedSymbolsOnly) {
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return BaseLayer.findSymbolIn(H, Name, ExportedSymbolsOnly);
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}
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/// @brief Immediately emit and finalize the object set represented by the
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/// given handle.
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/// @param H Handle for object set to emit/finalize.
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void emitAndFinalize(ObjSetHandleT H) { BaseLayer.emitAndFinalize(H); }
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/// @brief Map section addresses for the objects associated with the handle H.
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void mapSectionAddress(ObjSetHandleT H, const void *LocalAddress,
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TargetAddress TargetAddr) {
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BaseLayer.mapSectionAddress(H, LocalAddress, TargetAddr);
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}
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// Ownership hack.
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// FIXME: Remove this as soon as RuntimeDyldELF can apply relocations without
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// referencing the original object.
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template <typename OwningMBSet>
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void takeOwnershipOfBuffers(ObjSetHandleT H, OwningMBSet MBs) {
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BaseLayer.takeOwnershipOfBuffers(H, std::move(MBs));
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}
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/// @brief Access the transform functor directly.
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TransformFtor &getTransform() { return Transform; }
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/// @brief Access the mumate functor directly.
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const TransformFtor &getTransform() const { return Transform; }
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private:
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BaseLayerT &BaseLayer;
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TransformFtor Transform;
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};
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} // End namespace orc.
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} // End namespace llvm.
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#endif // LLVM_EXECUTIONENGINE_ORC_OBJECTTRANSFORMLAYER_H
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