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+//===-- SectionMemoryManager.h - Memory allocator for MCJIT -----*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains the declaration of a section-based memory manager used by
+// the MCJIT execution engine.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_EXECUTION_ENGINE_SECTION_MEMORY_MANAGER_H
+#define LLVM_EXECUTION_ENGINE_SECTION_MEMORY_MANAGER_H
+
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ExecutionEngine/JITMemoryManager.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/Memory.h"
+
+namespace llvm {
+
+// Section-based memory manager for MCJIT
+class SectionMemoryManager : public JITMemoryManager {
+
+public:
+
+ SectionMemoryManager() { }
+ ~SectionMemoryManager();
+
+ virtual uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
+ unsigned SectionID);
+
+ virtual uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
+ unsigned SectionID);
+
+ virtual void *getPointerToNamedFunction(const std::string &Name,
+ bool AbortOnFailure = true);
+
+ // Invalidate instruction cache for code sections. Some platforms with
+ // separate data cache and instruction cache require explicit cache flush,
+ // otherwise JIT code manipulations (like resolved relocations) will get to
+ // the data cache but not to the instruction cache.
+ virtual void invalidateInstructionCache();
+
+private:
+
+ SmallVector<sys::MemoryBlock, 16> AllocatedDataMem;
+ SmallVector<sys::MemoryBlock, 16> AllocatedCodeMem;
+ SmallVector<sys::MemoryBlock, 16> FreeCodeMem;
+
+public:
+ ///
+ /// Functions below are not used by MCJIT, but must be implemented because
+ /// they are declared as pure virtuals in the base class.
+ ///
+
+ virtual void setMemoryWritable() {
+ llvm_unreachable("Unexpected call!");
+ }
+ virtual void setMemoryExecutable() {
+ llvm_unreachable("Unexpected call!");
+ }
+ virtual void setPoisonMemory(bool poison) {
+ llvm_unreachable("Unexpected call!");
+ }
+ virtual void AllocateGOT() {
+ llvm_unreachable("Unexpected call!");
+ }
+ virtual uint8_t *getGOTBase() const {
+ llvm_unreachable("Unexpected call!");
+ return 0;
+ }
+ virtual uint8_t *startFunctionBody(const Function *F,
+ uintptr_t &ActualSize){
+ llvm_unreachable("Unexpected call!");
+ return 0;
+ }
+ virtual uint8_t *allocateStub(const GlobalValue* F, unsigned StubSize,
+ unsigned Alignment) {
+ llvm_unreachable("Unexpected call!");
+ return 0;
+ }
+ virtual void endFunctionBody(const Function *F, uint8_t *FunctionStart,
+ uint8_t *FunctionEnd) {
+ llvm_unreachable("Unexpected call!");
+ }
+ virtual uint8_t *allocateSpace(intptr_t Size, unsigned Alignment) {
+ llvm_unreachable("Unexpected call!");
+ return 0;
+ }
+ virtual uint8_t *allocateGlobal(uintptr_t Size, unsigned Alignment) {
+ llvm_unreachable("Unexpected call!");
+ return 0;
+ }
+ virtual void deallocateFunctionBody(void *Body) {
+ llvm_unreachable("Unexpected call!");
+ }
+ virtual uint8_t *startExceptionTable(const Function *F,
+ uintptr_t &ActualSize) {
+ llvm_unreachable("Unexpected call!");
+ return 0;
+ }
+ virtual void endExceptionTable(const Function *F, uint8_t *TableStart,
+ uint8_t *TableEnd, uint8_t *FrameRegister) {
+ llvm_unreachable("Unexpected call!");
+ }
+ virtual void deallocateExceptionTable(void *ET) {
+ llvm_unreachable("Unexpected call!");
+ }
+};
+
+}
+
+#endif // LLVM_EXECUTION_ENGINE_SECTION_MEMORY_MANAGER_H