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//===- JITEventListener.h - Exposes events from JIT compilation -*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the JITEventListener interface, which lets users get
// callbacks when significant events happen during the JIT compilation process.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_EXECUTION_ENGINE_JIT_EVENTLISTENER_H
#define LLVM_EXECUTION_ENGINE_JIT_EVENTLISTENER_H
#include "llvm/Support/DataTypes.h"
#include "llvm/Support/DebugLoc.h"
#include <vector>
namespace llvm {
class Function;
class MachineFunction;
/// JITEvent_EmittedFunctionDetails - Helper struct for containing information
/// about a generated machine code function.
struct JITEvent_EmittedFunctionDetails {
struct LineStart {
/// The address at which the current line changes.
uintptr_t Address;
/// The new location information. These can be translated to DebugLocTuples
/// using MF->getDebugLocTuple().
DebugLoc Loc;
};
/// The machine function the struct contains information for.
const MachineFunction *MF;
/// The list of line boundary information, sorted by address.
std::vector<LineStart> LineStarts;
};
/// JITEventListener - Abstract interface for use by the JIT to notify clients
/// about significant events during compilation. For example, to notify
/// profilers and debuggers that need to know where functions have been emitted.
///
/// The default implementation of each method does nothing.
class JITEventListener {
public:
typedef JITEvent_EmittedFunctionDetails EmittedFunctionDetails;
public:
JITEventListener() {}
virtual ~JITEventListener();
/// NotifyFunctionEmitted - Called after a function has been successfully
/// emitted to memory. The function still has its MachineFunction attached,
/// if you should happen to need that.
virtual void NotifyFunctionEmitted(const Function &F,
void *Code, size_t Size,
const EmittedFunctionDetails &Details) {}
/// NotifyFreeingMachineCode - Called from freeMachineCodeForFunction(), after
/// the global mapping is removed, but before the machine code is returned to
/// the allocator.
///
/// OldPtr is the address of the machine code and will be the same as the Code
/// parameter to a previous NotifyFunctionEmitted call. The Function passed
/// to NotifyFunctionEmitted may have been destroyed by the time of the
/// matching NotifyFreeingMachineCode call.
virtual void NotifyFreeingMachineCode(void *OldPtr) {}
};
// This returns NULL if support isn't available.
JITEventListener *createOProfileJITEventListener();
} // end namespace llvm.
#endif
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