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//===-- MCJITMemoryManager.h - Definition for the Memory Manager ---C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_EXECUTIONENGINE_MCJITMEMORYMANAGER_H
#define LLVM_LIB_EXECUTIONENGINE_MCJITMEMORYMANAGER_H
#include "llvm/Module.h"
#include "llvm/ExecutionEngine/JITMemoryManager.h"
#include "llvm/ExecutionEngine/RuntimeDyld.h"
#include <assert.h>
namespace llvm {
// The MCJIT memory manager is a layer between the standard JITMemoryManager
// and the RuntimeDyld interface that maps objects, by name, onto their
// matching LLVM IR counterparts in the module(s) being compiled.
class MCJITMemoryManager : public RTDyldMemoryManager {
virtual void anchor();
JITMemoryManager *JMM;
// FIXME: Multiple modules.
Module *M;
public:
MCJITMemoryManager(JITMemoryManager *jmm, Module *m) : JMM(jmm), M(m) {}
// We own the JMM, so make sure to delete it.
~MCJITMemoryManager() { delete JMM; }
// Allocate ActualSize bytes, or more, for the named function. Return
// a pointer to the allocated memory and update Size to reflect how much
// memory was acutally allocated.
uint8_t *startFunctionBody(const char *Name, uintptr_t &Size) {
// FIXME: This should really reference the MCAsmInfo to get the global
// prefix.
if (Name[0] == '_') ++Name;
Function *F = M->getFunction(Name);
// Some ObjC names have a prefixed \01 in the IR. If we failed to find
// the symbol and it's of the ObjC conventions (starts with "-" or
// "+"), try prepending a \01 and see if we can find it that way.
if (!F && (Name[0] == '-' || Name[0] == '+'))
F = M->getFunction((Twine("\1") + Name).str());
assert(F && "No matching function in JIT IR Module!");
return JMM->startFunctionBody(F, Size);
}
// Mark the end of the function, including how much of the allocated
// memory was actually used.
void endFunctionBody(const char *Name, uint8_t *FunctionStart,
uint8_t *FunctionEnd) {
// FIXME: This should really reference the MCAsmInfo to get the global
// prefix.
if (Name[0] == '_') ++Name;
Function *F = M->getFunction(Name);
// Some ObjC names have a prefixed \01 in the IR. If we failed to find
// the symbol and it's of the ObjC conventions (starts with "-" or
// "+"), try prepending a \01 and see if we can find it that way.
if (!F && (Name[0] == '-' || Name[0] == '+'))
F = M->getFunction((Twine("\1") + Name).str());
assert(F && "No matching function in JIT IR Module!");
JMM->endFunctionBody(F, FunctionStart, FunctionEnd);
}
};
} // End llvm namespace
#endif
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