llvm-6502/tools/lli/RemoteMemoryManager.h
2013-10-04 00:49:38 +00:00

106 lines
3.7 KiB
C++

//===- 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(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<const 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, const 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);
void *getPointerToNamedFunction(const std::string &Name,
bool AbortOnFailure = true);
void notifyObjectLoaded(ExecutionEngine *EE, const ObjectImage *Obj);
bool finalizeMemory(std::string *ErrMsg);
// 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