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This patch replaces RuntimeDyld::SymbolInfo with JITSymbol: A symbol class that is capable of lazy materialization (i.e. the symbol definition needn't be emitted until the address is requested). This can be used to support common and weak symbols in the JIT (though this is not implemented in this patch). For consistency, RuntimeDyld::SymbolResolver is renamed to JITSymbolResolver. For space efficiency a new class, JITEvaluatedSymbol, is introduced that behaves like the old RuntimeDyld::SymbolInfo - i.e. it is just a pair of an address and symbol flags. Instances of JITEvaluatedSymbol can be used in symbol-tables to avoid paying the space cost of the materializer. llvm-svn: 277386
61 lines
1.9 KiB
C++
61 lines
1.9 KiB
C++
//===-- LambdaResolverMM - Redirect symbol lookup via a 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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// Defines a RuntimeDyld::SymbolResolver subclass that uses a user-supplied
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// functor for symbol resolution.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_EXECUTIONENGINE_ORC_LAMBDARESOLVER_H
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#define LLVM_EXECUTIONENGINE_ORC_LAMBDARESOLVER_H
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ExecutionEngine/RuntimeDyld.h"
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#include <memory>
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namespace llvm {
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namespace orc {
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template <typename DylibLookupFtorT, typename ExternalLookupFtorT>
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class LambdaResolver : public JITSymbolResolver {
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public:
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LambdaResolver(DylibLookupFtorT DylibLookupFtor,
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ExternalLookupFtorT ExternalLookupFtor)
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: DylibLookupFtor(DylibLookupFtor),
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ExternalLookupFtor(ExternalLookupFtor) {}
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JITSymbol findSymbolInLogicalDylib(const std::string &Name) final {
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return DylibLookupFtor(Name);
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}
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JITSymbol findSymbol(const std::string &Name) final {
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return ExternalLookupFtor(Name);
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}
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private:
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DylibLookupFtorT DylibLookupFtor;
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ExternalLookupFtorT ExternalLookupFtor;
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};
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template <typename DylibLookupFtorT,
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typename ExternalLookupFtorT>
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std::unique_ptr<LambdaResolver<DylibLookupFtorT, ExternalLookupFtorT>>
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createLambdaResolver(DylibLookupFtorT DylibLookupFtor,
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ExternalLookupFtorT ExternalLookupFtor) {
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typedef LambdaResolver<DylibLookupFtorT, ExternalLookupFtorT> LR;
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return make_unique<LR>(std::move(DylibLookupFtor),
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std::move(ExternalLookupFtor));
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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_LAMBDARESOLVER_H
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