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//===----- RemoteTargetExternal.h - LLVM out-of-process JIT execution -----===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Definition of the RemoteTargetExternal class which executes JITed code in a
// separate process from where it was built.
//
//===----------------------------------------------------------------------===//
#ifndef LLI_REMOTETARGETEXTERNAL_H
#define LLI_REMOTETARGETEXTERNAL_H
#include "llvm/Config/config.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/DataTypes.h"
#include "llvm/Support/Memory.h"
#include <stdlib.h>
#include <string>
#include "RemoteTarget.h"
#include "RemoteTargetMessage.h"
namespace llvm {
class RemoteTargetExternal : public RemoteTarget {
public:
/// Allocate space in the remote target address space.
///
/// @param Size Amount of space, in bytes, to allocate.
/// @param Alignment Required minimum alignment for allocated space.
/// @param[out] Address Remote address of the allocated memory.
///
/// @returns False on success. On failure, ErrorMsg is updated with
/// descriptive text of the encountered error.
virtual bool allocateSpace(size_t Size,
unsigned Alignment,
uint64_t &Address);
/// Load data into the target address space.
///
/// @param Address Destination address in the target process.
/// @param Data Source address in the host process.
/// @param Size Number of bytes to copy.
///
/// @returns False on success. On failure, ErrorMsg is updated with
/// descriptive text of the encountered error.
virtual bool loadData(uint64_t Address, const void *Data, size_t Size);
/// Load code into the target address space and prepare it for execution.
///
/// @param Address Destination address in the target process.
/// @param Data Source address in the host process.
/// @param Size Number of bytes to copy.
///
/// @returns False on success. On failure, ErrorMsg is updated with
/// descriptive text of the encountered error.
virtual bool loadCode(uint64_t Address, const void *Data, size_t Size);
/// Execute code in the target process. The called function is required
/// to be of signature int "(*)(void)".
///
/// @param Address Address of the loaded function in the target
/// process.
/// @param[out] RetVal The integer return value of the called function.
///
/// @returns False on success. On failure, ErrorMsg is updated with
/// descriptive text of the encountered error.
virtual bool executeCode(uint64_t Address, int &RetVal);
/// Minimum alignment for memory permissions. Used to seperate code and
/// data regions to make sure data doesn't get marked as code or vice
/// versa.
///
/// @returns Page alignment return value. Default of 4k.
virtual unsigned getPageAlignment() { return 4096; }
/// Start the remote process.
virtual void create();
/// Terminate the remote process.
virtual void stop();
RemoteTargetExternal(std::string &Name) : RemoteTarget(), ChildName(Name) {}
virtual ~RemoteTargetExternal();
private:
std::string ChildName;
// This will get filled in as a point to an OS-specific structure.
void *ConnectionData;
void SendAllocateSpace(uint32_t Alignment, uint32_t Size);
void SendLoadSection(uint64_t Addr,
const void *Data,
uint32_t Size,
bool IsCode);
void SendExecute(uint64_t Addr);
void SendTerminate();
void Receive(LLIMessageType Msg);
void Receive(LLIMessageType Msg, int &Data);
void Receive(LLIMessageType Msg, uint64_t &Data);
int WriteBytes(const void *Data, size_t Size);
int ReadBytes(void *Data, size_t Size);
void Wait();
};
} // end namespace llvm
#endif // LLI_REMOTETARGETEXTERNAL_H
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