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Diffstat (limited to 'tools/lli/RemoteMemoryManager.h')
-rw-r--r-- | tools/lli/RemoteMemoryManager.h | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/tools/lli/RemoteMemoryManager.h b/tools/lli/RemoteMemoryManager.h new file mode 100644 index 0000000..5d0456f --- /dev/null +++ b/tools/lli/RemoteMemoryManager.h @@ -0,0 +1,114 @@ +//===- RemoteMemoryManager.h - LLI MCJIT recording memory manager ------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This memory manager allocates local storage and keeps a record of each +// allocation. Iterators are provided for all data and code allocations. +// +//===----------------------------------------------------------------------===// + +#ifndef REMOTEMEMORYMANAGER_H +#define REMOTEMEMORYMANAGER_H + +#include "llvm/ADT/DenseMap.h" +#include "llvm/ADT/SmallVector.h" +#include "llvm/ExecutionEngine/JITMemoryManager.h" +#include "llvm/Support/ErrorHandling.h" +#include "llvm/Support/Memory.h" +#include <utility> + +#include "RemoteTarget.h" + +namespace llvm { + +class RemoteMemoryManager : public JITMemoryManager { +public: + // Notice that this structure takes ownership of the memory allocated. + struct Allocation { + Allocation() {} + Allocation(sys::MemoryBlock mb, unsigned a, bool code) + : MB(mb), Alignment(a), IsCode(code) {} + + sys::MemoryBlock MB; + unsigned Alignment; + bool IsCode; + }; + +private: + // This vector contains Allocation objects for all sections which we have + // allocated. This vector effectively owns the memory associated with the + // allocations. + SmallVector<Allocation, 2> AllocatedSections; + + // This vector contains pointers to Allocation objects for any sections we + // have allocated locally but have not yet remapped for the remote target. + // When we receive notification of a completed module load, we will map + // these sections into the remote target. + SmallVector<Allocation, 2> UnmappedSections; + + // This map tracks the sections we have remapped for the remote target + // but have not yet copied to the target. + DenseMap<uint64_t, Allocation> MappedSections; + + // FIXME: This is part of a work around to keep sections near one another + // when MCJIT performs relocations after code emission but before + // the generated code is moved to the remote target. + sys::MemoryBlock Near; + sys::MemoryBlock allocateSection(uintptr_t Size); + + RemoteTarget *Target; + +public: + RemoteMemoryManager() : Target(NULL) {} + virtual ~RemoteMemoryManager(); + + uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment, + unsigned SectionID, StringRef SectionName); + + uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment, + unsigned SectionID, StringRef SectionName, + bool IsReadOnly); + + // For now, remote symbol resolution is not support in lli. The MCJIT + // interface does support this, but clients must provide their own + // mechanism for finding remote symbol addresses. MCJIT will resolve + // symbols from Modules it contains. + uint64_t getSymbolAddress(const std::string &Name) { return 0; } + + void notifyObjectLoaded(ExecutionEngine *EE, const ObjectImage *Obj); + + bool finalizeMemory(std::string *ErrMsg); + + // For now, remote EH frame registration isn't supported. Remote symbol + // resolution is a prerequisite to supporting remote EH frame registration. + void registerEHFrames(uint8_t *Addr, uint64_t LoadAddr, size_t Size) {} + void deregisterEHFrames(uint8_t *Addr, uint64_t LoadAddr, size_t Size) {} + + // This is a non-interface function used by lli + void setRemoteTarget(RemoteTarget *T) { Target = T; } + + // The following obsolete JITMemoryManager calls are stubbed out for + // this model. + void setMemoryWritable(); + void setMemoryExecutable(); + void setPoisonMemory(bool poison); + void AllocateGOT(); + uint8_t *getGOTBase() const; + uint8_t *startFunctionBody(const Function *F, uintptr_t &ActualSize); + uint8_t *allocateStub(const GlobalValue* F, unsigned StubSize, + unsigned Alignment); + void endFunctionBody(const Function *F, uint8_t *FunctionStart, + uint8_t *FunctionEnd); + uint8_t *allocateSpace(intptr_t Size, unsigned Alignment); + uint8_t *allocateGlobal(uintptr_t Size, unsigned Alignment); + void deallocateFunctionBody(void *Body); +}; + +} // end namespace llvm + +#endif |