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author | Reid Kleckner <reid@kleckner.net> | 2009-07-23 21:46:56 +0000 |
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committer | Reid Kleckner <reid@kleckner.net> | 2009-07-23 21:46:56 +0000 |
commit | 10b4fc552f984dc978298d50c09c97c0764962fc (patch) | |
tree | 7176fba11d96f36811cc11aa39ce5bb23d217805 /include/llvm/ExecutionEngine/JITMemoryManager.h | |
parent | 50340f666b5b1fceb2c781464779b4a0f583db9a (diff) | |
download | llvm-10b4fc552f984dc978298d50c09c97c0764962fc.tar.gz llvm-10b4fc552f984dc978298d50c09c97c0764962fc.tar.bz2 llvm-10b4fc552f984dc978298d50c09c97c0764962fc.tar.xz |
Re-committing r76828 with the JIT memory manager changes now that the build
bots like the BumpPtrAllocator changes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76902 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include/llvm/ExecutionEngine/JITMemoryManager.h')
-rw-r--r-- | include/llvm/ExecutionEngine/JITMemoryManager.h | 69 |
1 files changed, 60 insertions, 9 deletions
diff --git a/include/llvm/ExecutionEngine/JITMemoryManager.h b/include/llvm/ExecutionEngine/JITMemoryManager.h index 02ec1c3a50..4539011571 100644 --- a/include/llvm/ExecutionEngine/JITMemoryManager.h +++ b/include/llvm/ExecutionEngine/JITMemoryManager.h @@ -15,9 +15,12 @@ #define LLVM_EXECUTION_ENGINE_JIT_MEMMANAGER_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 @@ -88,16 +91,19 @@ public: //===--------------------------------------------------------------------===// // Main Allocation Functions //===--------------------------------------------------------------------===// - - /// startFunctionBody - When we start JITing a function, the JIT calls this + + /// 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. The JIT doesn't know ahead of time how much space it will need to - /// emit the function, so it doesn't pass in the size. Instead, this method - /// is required to pass back a "valid size". The JIT will be careful to not - /// write more than the returned ActualSize bytes of memory. - virtual uint8_t *startFunctionBody(const Function *F, + /// 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 @@ -118,10 +124,12 @@ public: virtual void endFunctionBody(const Function *F, uint8_t *FunctionStart, uint8_t *FunctionEnd) = 0; - /// allocateSpace - Allocate a memory block of the given size. + /// 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; /// deallocateMemForFunction - Free JIT memory for the specified function. @@ -137,6 +145,49 @@ public: /// the exception table. virtual void endExceptionTable(const Function *F, uint8_t *TableStart, uint8_t *TableEnd, uint8_t* FrameRegister) = 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 &ErrorStr) { + 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. |