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

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

llvm-svn: 182408

1 files changed, 28 insertions, 0 deletions

diff --git a/llvm/include/llvm-c/ExecutionEngine.h b/llvm/include/llvm-c/ExecutionEngine.h
index 8fae77d..50fdb6b 100644
--- a/llvm/include/llvm-c/ExecutionEngine.h
+++ b/llvm/include/llvm-c/ExecutionEngine.h
@@ -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);
+
 /**
  * @}
  */