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