#include <JITMemoryManager.h>
Public Member Functions | |
| JITMemoryManager () | |
| virtual | ~JITMemoryManager () |
| virtual void | setMemoryWritable ()=0 |
| virtual void | setMemoryExecutable ()=0 |
| virtual void | setPoisonMemory (bool poison)=0 |
| virtual void | AllocateGOT ()=0 |
| bool | isManagingGOT () const |
| isManagingGOT - Return true if the AllocateGOT method is called. | |
| virtual uint8_t * | getGOTBase () const =0 |
| virtual uint8_t * | startFunctionBody (const Function *F, uintptr_t &ActualSize)=0 |
| virtual uint8_t * | allocateStub (const GlobalValue *F, unsigned StubSize, unsigned Alignment)=0 |
| virtual void | endFunctionBody (const Function *F, uint8_t *FunctionStart, uint8_t *FunctionEnd)=0 |
| virtual uint8_t * | allocateSpace (intptr_t Size, unsigned Alignment)=0 |
| virtual uint8_t * | allocateGlobal (uintptr_t Size, unsigned Alignment)=0 |
| allocateGlobal - Allocate memory for a global. | |
| virtual void | deallocateFunctionBody (void *Body)=0 |
| virtual bool | CheckInvariants (std::string &) |
| virtual size_t | GetDefaultCodeSlabSize () |
| virtual size_t | GetDefaultDataSlabSize () |
| virtual size_t | GetDefaultStubSlabSize () |
| virtual unsigned | GetNumCodeSlabs () |
| virtual unsigned | GetNumDataSlabs () |
| virtual unsigned | GetNumStubSlabs () |
Static Public Member Functions | |
| static JITMemoryManager * | CreateDefaultMemManager () |
Protected Attributes | |
| bool | HasGOT |
Detailed Description
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.
Definition at line 26 of file JITMemoryManager.h.
Constructor & Destructor Documentation
| llvm::JITMemoryManager::JITMemoryManager | ( | ) | [inline] |
Definition at line 31 of file JITMemoryManager.h.
| JITMemoryManager::~JITMemoryManager | ( | ) | [virtual] |
Definition at line 46 of file JITMemoryManager.cpp.
Member Function Documentation
| virtual uint8_t* llvm::JITMemoryManager::allocateGlobal | ( | uintptr_t | Size, |
| unsigned | Alignment | ||
| ) | [pure virtual] |
allocateGlobal - Allocate memory for a global.
| virtual void llvm::JITMemoryManager::AllocateGOT | ( | ) | [pure virtual] |
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 uint8_t* llvm::JITMemoryManager::allocateSpace | ( | intptr_t | Size, |
| unsigned | Alignment | ||
| ) | [pure virtual] |
allocateSpace - Allocate a memory block of the given size. This method cannot be called between calls to startFunctionBody and endFunctionBody.
| virtual uint8_t* llvm::JITMemoryManager::allocateStub | ( | const GlobalValue * | F, |
| unsigned | StubSize, | ||
| unsigned | Alignment | ||
| ) | [pure virtual] |
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 bool llvm::JITMemoryManager::CheckInvariants | ( | std::string & | ) | [inline, virtual] |
CheckInvariants - For testing only. Return true if all internal invariants are preserved, or return false and set ErrorStr to a helpful error message.
Definition at line 121 of file JITMemoryManager.h.
| JITMemoryManager * JITMemoryManager::CreateDefaultMemManager | ( | ) | [static] |
CreateDefaultMemManager - This is used to create the default JIT Memory Manager if the client does not provide one to the JIT.
Definition at line 894 of file JITMemoryManager.cpp.
| virtual void llvm::JITMemoryManager::deallocateFunctionBody | ( | void * | Body | ) | [pure virtual] |
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 llvm::JITMemoryManager::endFunctionBody | ( | const Function * | F, |
| uint8_t * | FunctionStart, | ||
| uint8_t * | FunctionEnd | ||
| ) | [pure virtual] |
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 size_t llvm::JITMemoryManager::GetDefaultCodeSlabSize | ( | ) | [inline, virtual] |
GetDefaultCodeSlabSize - For testing only. Returns DefaultCodeSlabSize from DefaultJITMemoryManager.
Definition at line 127 of file JITMemoryManager.h.
| virtual size_t llvm::JITMemoryManager::GetDefaultDataSlabSize | ( | ) | [inline, virtual] |
GetDefaultDataSlabSize - For testing only. Returns DefaultCodeSlabSize from DefaultJITMemoryManager.
Definition at line 133 of file JITMemoryManager.h.
| virtual size_t llvm::JITMemoryManager::GetDefaultStubSlabSize | ( | ) | [inline, virtual] |
GetDefaultStubSlabSize - For testing only. Returns DefaultCodeSlabSize from DefaultJITMemoryManager.
Definition at line 139 of file JITMemoryManager.h.
| virtual uint8_t* llvm::JITMemoryManager::getGOTBase | ( | ) | const [pure virtual] |
getGOTBase - If this is managing a Global Offset Table, this method should return a pointer to its base.
| virtual unsigned llvm::JITMemoryManager::GetNumCodeSlabs | ( | ) | [inline, virtual] |
GetNumCodeSlabs - For testing only. Returns the number of MemoryBlocks allocated for code.
Definition at line 145 of file JITMemoryManager.h.
| virtual unsigned llvm::JITMemoryManager::GetNumDataSlabs | ( | ) | [inline, virtual] |
GetNumDataSlabs - For testing only. Returns the number of MemoryBlocks allocated for data.
Definition at line 151 of file JITMemoryManager.h.
| virtual unsigned llvm::JITMemoryManager::GetNumStubSlabs | ( | ) | [inline, virtual] |
GetNumStubSlabs - For testing only. Returns the number of MemoryBlocks allocated for function stubs.
Definition at line 157 of file JITMemoryManager.h.
| bool llvm::JITMemoryManager::isManagingGOT | ( | ) | const [inline] |
isManagingGOT - Return true if the AllocateGOT method is called.
Definition at line 61 of file JITMemoryManager.h.
References HasGOT.
| virtual void llvm::JITMemoryManager::setMemoryExecutable | ( | ) | [pure virtual] |
setMemoryExecutable - When code generation is done and we're ready to start execution, the code pages may need permissions changed.
| virtual void llvm::JITMemoryManager::setMemoryWritable | ( | ) | [pure virtual] |
setMemoryWritable - When code generation is in progress, the code pages may need permissions changed.
| virtual void llvm::JITMemoryManager::setPoisonMemory | ( | bool | poison | ) | [pure virtual] |
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 uint8_t* llvm::JITMemoryManager::startFunctionBody | ( | const Function * | F, |
| uintptr_t & | ActualSize | ||
| ) | [pure virtual] |
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.
Member Data Documentation
bool llvm::JITMemoryManager::HasGOT [protected] |
Definition at line 28 of file JITMemoryManager.h.
Referenced by isManagingGOT().
The documentation for this class was generated from the following files:
1.7.6.1