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Expose the RTDyldMemoryManager through the C API. This allows clients of

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the C API to provide their own way of allocating JIT memory (both code 
and data) and finalizing memory permissions (page protections, cache 
flush).



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182448 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Filip Pizlo
2013-05-22 02:46:43 +00:00
parent 67295357cc
commit 6cfed36338
6 changed files with 278 additions and 46 deletions
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28
include/llvm-c/ExecutionEngine.h
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@@ -40,12 +40,14 @@ void LLVMLinkInInterpreter(void);
typedef struct LLVMOpaqueGenericValue *LLVMGenericValueRef;
typedef struct LLVMOpaqueExecutionEngine *LLVMExecutionEngineRef;
typedef struct LLVMOpaqueMCJITMemoryManager *LLVMMCJITMemoryManagerRef;
struct LLVMMCJITCompilerOptions {
unsigned OptLevel;
LLVMCodeModel CodeModel;
LLVMBool NoFramePointerElim;
LLVMBool EnableFastISel;
LLVMMCJITMemoryManagerRef MCJMM;
};
/*===-- Operations on generic values --------------------------------------===*/
@@ -167,6 +169,32 @@ void LLVMAddGlobalMapping(LLVMExecutionEngineRef EE, LLVMValueRef Global,
void *LLVMGetPointerToGlobal(LLVMExecutionEngineRef EE, LLVMValueRef Global);
/*===-- Operations on memory managers -------------------------------------===*/
/**
* Create a simple custom MCJIT memory manager. This memory manager can
* intercept allocations in a module-oblivious way. This will return NULL
* if any of the passed functions are NULL.
*
* @param Opaque An opaque client object to pass back to the callbacks.
* @param AllocateCodeSection Allocate a block of memory for executable code.
* @param AllocateDataSection Allocate a block of memory for data.
* @param FinalizeMemory Set page permissions and flush cache. Return 0 on
* success, 1 on error.
*/
LLVMMCJITMemoryManagerRef LLVMCreateSimpleMCJITMemoryManager(
void *Opaque,
uint8_t *(*AllocateCodeSection)(void *Opaque,
uintptr_t Size, unsigned Alignment,
unsigned SectionID),
uint8_t *(*AllocateDataSection)(void *Opaque,
uintptr_t Size, unsigned Alignment,
unsigned SectionID, LLVMBool IsReadOnly),
LLVMBool (*FinalizeMemory)(void *Opaque, char **ErrMsg),
void (*Destroy)(void *Opaque));
void LLVMDisposeMCJITMemoryManager(LLVMMCJITMemoryManagerRef MM);
/**
* @}
*/