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