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//===- ObjectTransformLayer.h - Run all objects through functor -*- 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
//
//===----------------------------------------------------------------------===//
//
// Run all objects passed in through a user supplied functor.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_EXECUTIONENGINE_ORC_OBJECTTRANSFORMLAYER_H
#define LLVM_EXECUTIONENGINE_ORC_OBJECTTRANSFORMLAYER_H
#include "llvm/ExecutionEngine/JITSymbol.h"
#include "llvm/ExecutionEngine/Orc/Layer.h"
#include <algorithm>
#include <memory>
#include <string>
namespace llvm {
namespace orc {
class ObjectTransformLayer : public ObjectLayer {
public:
using TransformFunction =
std::function<Expected<std::unique_ptr<MemoryBuffer>>(
std::unique_ptr<MemoryBuffer>)>;
ObjectTransformLayer(ExecutionSession &ES, ObjectLayer &BaseLayer,
TransformFunction Transform);
void emit(MaterializationResponsibility R,
std::unique_ptr<MemoryBuffer> O) override;
private:
ObjectLayer &BaseLayer;
TransformFunction Transform;
};
/// Object mutating layer.
///
/// This layer accepts sets of ObjectFiles (via addObject). 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 LegacyObjectTransformLayer {
public:
/// Construct an ObjectTransformLayer with the given BaseLayer
LLVM_ATTRIBUTE_DEPRECATED(
LegacyObjectTransformLayer(BaseLayerT &BaseLayer,
TransformFtor Transform = TransformFtor()),
"ORCv1 layers (layers with the 'Legacy' prefix) are deprecated. Please "
"use "
"the ORCv2 ObjectTransformLayer instead");
/// Legacy layer constructor with deprecation acknowledgement.
LegacyObjectTransformLayer(ORCv1DeprecationAcknowledgement,
BaseLayerT &BaseLayer,
TransformFtor Transform = TransformFtor())
: BaseLayer(BaseLayer), Transform(std::move(Transform)) {}
/// 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 ObjectPtr> Error addObject(VModuleKey K, ObjectPtr Obj) {
return BaseLayer.addObject(std::move(K), Transform(std::move(Obj)));
}
/// Remove the object set associated with the VModuleKey K.
Error removeObject(VModuleKey K) { return BaseLayer.removeObject(K); }
/// 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);
}
/// Get the address of the given symbol in the context of the set of
/// objects represented by the VModuleKey K. This call is forwarded to
/// the base layer's implementation.
/// @param K The VModuleKey associated with 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(VModuleKey K, const std::string &Name,
bool ExportedSymbolsOnly) {
return BaseLayer.findSymbolIn(K, Name, ExportedSymbolsOnly);
}
/// Immediately emit and finalize the object set represented by the
/// given VModuleKey K.
Error emitAndFinalize(VModuleKey K) { return BaseLayer.emitAndFinalize(K); }
/// Map section addresses for the objects associated with the
/// VModuleKey K.
void mapSectionAddress(VModuleKey K, const void *LocalAddress,
JITTargetAddress TargetAddr) {
BaseLayer.mapSectionAddress(K, LocalAddress, TargetAddr);
}
/// Access the transform functor directly.
TransformFtor &getTransform() { return Transform; }
/// Access the mumate functor directly.
const TransformFtor &getTransform() const { return Transform; }
private:
BaseLayerT &BaseLayer;
TransformFtor Transform;
};
template <typename BaseLayerT, typename TransformFtor>
LegacyObjectTransformLayer<BaseLayerT, TransformFtor>::
LegacyObjectTransformLayer(BaseLayerT &BaseLayer, TransformFtor Transform)
: BaseLayer(BaseLayer), Transform(std::move(Transform)) {}
} // end namespace orc
} // end namespace llvm
#endif // LLVM_EXECUTIONENGINE_ORC_OBJECTTRANSFORMLAYER_H
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