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0717be951f
This patch removes the old JIT memory manager (which does not provide any useful functionality now that the old JIT is gone), and migrates the few remaining clients over to SectionMemoryManager. http://llvm.org/PR20848 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218316 91177308-0d34-0410-b5e6-96231b3b80d8
101 lines
3.7 KiB
C++
101 lines
3.7 KiB
C++
//===- RemoteMemoryManager.h - LLI MCJIT recording memory manager ------===//
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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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// This memory manager allocates local storage and keeps a record of each
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// allocation. Iterators are provided for all data and code allocations.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TOOLS_LLI_REMOTEMEMORYMANAGER_H
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#define LLVM_TOOLS_LLI_REMOTEMEMORYMANAGER_H
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#include "RemoteTarget.h"
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ExecutionEngine/RTDyldMemoryManager.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/Memory.h"
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#include <utility>
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namespace llvm {
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class RemoteMemoryManager : public RTDyldMemoryManager {
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public:
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// Notice that this structure takes ownership of the memory allocated.
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struct Allocation {
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Allocation() {}
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Allocation(sys::MemoryBlock mb, unsigned a, bool code)
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: MB(mb), Alignment(a), IsCode(code) {}
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sys::MemoryBlock MB;
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unsigned Alignment;
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bool IsCode;
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};
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private:
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// This vector contains Allocation objects for all sections which we have
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// allocated. This vector effectively owns the memory associated with the
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// allocations.
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SmallVector<Allocation, 2> AllocatedSections;
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// This vector contains pointers to Allocation objects for any sections we
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// have allocated locally but have not yet remapped for the remote target.
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// When we receive notification of a completed module load, we will map
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// these sections into the remote target.
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SmallVector<Allocation, 2> UnmappedSections;
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// This map tracks the sections we have remapped for the remote target
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// but have not yet copied to the target.
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DenseMap<uint64_t, Allocation> MappedSections;
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// FIXME: This is part of a work around to keep sections near one another
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// when MCJIT performs relocations after code emission but before
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// the generated code is moved to the remote target.
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sys::MemoryBlock Near;
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sys::MemoryBlock allocateSection(uintptr_t Size);
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RemoteTarget *Target;
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public:
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RemoteMemoryManager() : Target(nullptr) {}
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virtual ~RemoteMemoryManager();
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uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
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unsigned SectionID,
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StringRef SectionName) override;
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uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
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unsigned SectionID, StringRef SectionName,
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bool IsReadOnly) override;
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// For now, remote symbol resolution is not support in lli. The MCJIT
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// interface does support this, but clients must provide their own
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// mechanism for finding remote symbol addresses. MCJIT will resolve
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// symbols from Modules it contains.
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uint64_t getSymbolAddress(const std::string &Name) override { return 0; }
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void notifyObjectLoaded(ExecutionEngine *EE, const ObjectImage *Obj) override;
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bool finalizeMemory(std::string *ErrMsg) override;
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// For now, remote EH frame registration isn't supported. Remote symbol
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// resolution is a prerequisite to supporting remote EH frame registration.
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void registerEHFrames(uint8_t *Addr, uint64_t LoadAddr,
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size_t Size) override {}
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void deregisterEHFrames(uint8_t *Addr, uint64_t LoadAddr,
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size_t Size) override {}
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// This is a non-interface function used by lli
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void setRemoteTarget(RemoteTarget *T) { Target = T; }
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};
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} // end namespace llvm
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#endif
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