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075c1e2e1a
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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277386 91177308-0d34-0410-b5e6-96231b3b80d8
50 lines
1.4 KiB
C++
50 lines
1.4 KiB
C++
//===-- RuntimeDyldCOFF.h - Run-time dynamic linker for MC-JIT ---*- 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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// COFF support for MC-JIT runtime dynamic linker.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_RUNTIME_DYLD_COFF_H
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#define LLVM_RUNTIME_DYLD_COFF_H
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#include "RuntimeDyldImpl.h"
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#define DEBUG_TYPE "dyld"
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using namespace llvm;
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namespace llvm {
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// Common base class for COFF dynamic linker support.
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// Concrete subclasses for each target can be found in ./Targets.
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class RuntimeDyldCOFF : public RuntimeDyldImpl {
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public:
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std::unique_ptr<RuntimeDyld::LoadedObjectInfo>
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loadObject(const object::ObjectFile &Obj) override;
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bool isCompatibleFile(const object::ObjectFile &Obj) const override;
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static std::unique_ptr<RuntimeDyldCOFF>
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create(Triple::ArchType Arch, RuntimeDyld::MemoryManager &MemMgr,
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JITSymbolResolver &Resolver);
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protected:
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RuntimeDyldCOFF(RuntimeDyld::MemoryManager &MemMgr,
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JITSymbolResolver &Resolver)
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: RuntimeDyldImpl(MemMgr, Resolver) {}
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uint64_t getSymbolOffset(const SymbolRef &Sym);
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};
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} // end namespace llvm
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#undef DEBUG_TYPE
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#endif
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