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Diffstat (limited to 'include/llvm/ExecutionEngine/JITMemoryManager.h')
-rw-r--r-- | include/llvm/ExecutionEngine/JITMemoryManager.h | 164 |
1 files changed, 0 insertions, 164 deletions
diff --git a/include/llvm/ExecutionEngine/JITMemoryManager.h b/include/llvm/ExecutionEngine/JITMemoryManager.h deleted file mode 100644 index b22d899..0000000 --- a/include/llvm/ExecutionEngine/JITMemoryManager.h +++ /dev/null @@ -1,164 +0,0 @@ -//===-- JITMemoryManager.h - Interface JIT uses to Allocate Mem -*- C++ -*-===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// - -#ifndef LLVM_EXECUTIONENGINE_JITMEMORYMANAGER_H -#define LLVM_EXECUTIONENGINE_JITMEMORYMANAGER_H - -#include "llvm/ExecutionEngine/RuntimeDyld.h" -#include "llvm/Support/DataTypes.h" -#include <string> - -namespace llvm { - - class Function; - class GlobalValue; - -/// JITMemoryManager - This interface is used by the JIT to allocate and manage -/// memory for the code generated by the JIT. This can be reimplemented by -/// clients that have a strong desire to control how the layout of JIT'd memory -/// works. -class JITMemoryManager : public RTDyldMemoryManager { -protected: - bool HasGOT; - -public: - JITMemoryManager() : HasGOT(false) {} - virtual ~JITMemoryManager(); - - /// CreateDefaultMemManager - This is used to create the default - /// JIT Memory Manager if the client does not provide one to the JIT. - static JITMemoryManager *CreateDefaultMemManager(); - - /// setMemoryWritable - When code generation is in progress, - /// the code pages may need permissions changed. - virtual void setMemoryWritable() = 0; - - /// setMemoryExecutable - When code generation is done and we're ready to - /// start execution, the code pages may need permissions changed. - virtual void setMemoryExecutable() = 0; - - /// setPoisonMemory - Setting this flag to true makes the memory manager - /// garbage values over freed memory. This is useful for testing and - /// debugging, and may be turned on by default in debug mode. - virtual void setPoisonMemory(bool poison) = 0; - - //===--------------------------------------------------------------------===// - // Global Offset Table Management - //===--------------------------------------------------------------------===// - - /// AllocateGOT - If the current table requires a Global Offset Table, this - /// method is invoked to allocate it. This method is required to set HasGOT - /// to true. - virtual void AllocateGOT() = 0; - - /// isManagingGOT - Return true if the AllocateGOT method is called. - bool isManagingGOT() const { - return HasGOT; - } - - /// getGOTBase - If this is managing a Global Offset Table, this method should - /// return a pointer to its base. - virtual uint8_t *getGOTBase() const = 0; - - //===--------------------------------------------------------------------===// - // Main Allocation Functions - //===--------------------------------------------------------------------===// - - /// startFunctionBody - When we start JITing a function, the JIT calls this - /// method to allocate a block of free RWX memory, which returns a pointer to - /// it. If the JIT wants to request a block of memory of at least a certain - /// size, it passes that value as ActualSize, and this method returns a block - /// with at least that much space. If the JIT doesn't know ahead of time how - /// much space it will need to emit the function, it passes 0 for the - /// ActualSize. In either case, this method is required to pass back the size - /// of the allocated block through ActualSize. The JIT will be careful to - /// not write more than the returned ActualSize bytes of memory. - virtual uint8_t *startFunctionBody(const Function *F, - uintptr_t &ActualSize) = 0; - - /// allocateStub - This method is called by the JIT to allocate space for a - /// function stub (used to handle limited branch displacements) while it is - /// JIT compiling a function. For example, if foo calls bar, and if bar - /// either needs to be lazily compiled or is a native function that exists too - /// far away from the call site to work, this method will be used to make a - /// thunk for it. The stub should be "close" to the current function body, - /// but should not be included in the 'actualsize' returned by - /// startFunctionBody. - virtual uint8_t *allocateStub(const GlobalValue* F, unsigned StubSize, - unsigned Alignment) = 0; - - /// endFunctionBody - This method is called when the JIT is done codegen'ing - /// the specified function. At this point we know the size of the JIT - /// compiled function. This passes in FunctionStart (which was returned by - /// the startFunctionBody method) and FunctionEnd which is a pointer to the - /// actual end of the function. This method should mark the space allocated - /// and remember where it is in case the client wants to deallocate it. - virtual void endFunctionBody(const Function *F, uint8_t *FunctionStart, - uint8_t *FunctionEnd) = 0; - - /// allocateSpace - Allocate a memory block of the given size. This method - /// cannot be called between calls to startFunctionBody and endFunctionBody. - virtual uint8_t *allocateSpace(intptr_t Size, unsigned Alignment) = 0; - - /// allocateGlobal - Allocate memory for a global. - virtual uint8_t *allocateGlobal(uintptr_t Size, unsigned Alignment) = 0; - - /// deallocateFunctionBody - Free the specified function body. The argument - /// must be the return value from a call to startFunctionBody() that hasn't - /// been deallocated yet. This is never called when the JIT is currently - /// emitting a function. - virtual void deallocateFunctionBody(void *Body) = 0; - - /// CheckInvariants - For testing only. Return true if all internal - /// invariants are preserved, or return false and set ErrorStr to a helpful - /// error message. - virtual bool CheckInvariants(std::string &) { - return true; - } - - /// GetDefaultCodeSlabSize - For testing only. Returns DefaultCodeSlabSize - /// from DefaultJITMemoryManager. - virtual size_t GetDefaultCodeSlabSize() { - return 0; - } - - /// GetDefaultDataSlabSize - For testing only. Returns DefaultCodeSlabSize - /// from DefaultJITMemoryManager. - virtual size_t GetDefaultDataSlabSize() { - return 0; - } - - /// GetDefaultStubSlabSize - For testing only. Returns DefaultCodeSlabSize - /// from DefaultJITMemoryManager. - virtual size_t GetDefaultStubSlabSize() { - return 0; - } - - /// GetNumCodeSlabs - For testing only. Returns the number of MemoryBlocks - /// allocated for code. - virtual unsigned GetNumCodeSlabs() { - return 0; - } - - /// GetNumDataSlabs - For testing only. Returns the number of MemoryBlocks - /// allocated for data. - virtual unsigned GetNumDataSlabs() { - return 0; - } - - /// GetNumStubSlabs - For testing only. Returns the number of MemoryBlocks - /// allocated for function stubs. - virtual unsigned GetNumStubSlabs() { - return 0; - } -}; - -} // end namespace llvm. - -#endif |