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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
36 lines
1.1 KiB
C++
36 lines
1.1 KiB
C++
//===------ NullResolver.h - Reject symbol lookup requests ------*- 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 rejects all symbol
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// resolution requests, for clients that have no cross-object fixups.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_EXECUTIONENGINE_ORC_NULLRESOLVER_H
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#define LLVM_EXECUTIONENGINE_ORC_NULLRESOLVER_H
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#include "llvm/ExecutionEngine/RuntimeDyld.h"
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namespace llvm {
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namespace orc {
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/// SymbolResolver impliementation that rejects all resolution requests.
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/// Useful for clients that have no cross-object fixups.
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class NullResolver : public JITSymbolResolver {
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public:
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JITSymbol findSymbol(const std::string &Name) final;
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JITSymbol findSymbolInLogicalDylib(const std::string &Name) final;
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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_NULLRESOLVER_H
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