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/*
* Copyright (c) 2011, Denis Steckelmacher <steckdenis@yahoo.fr>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the copyright holder nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* \file cpu/program.h
* \brief CPU program
*/
#ifndef __CPU_PROGRAM_H__
#define __CPU_PROGRAM_H__
#include "../deviceinterface.h"
namespace llvm
{
class ExecutionEngine;
class Module;
}
namespace Coal
{
class CPUDevice;
class Program;
/**
* \brief CPU program
*
* This class implements the \c Coal::DeviceProgram interface for CPU
* acceleration.
*
* It's main purpose is to initialize a \c llvm::JIT object to run LLVM bitcode,
* in \c initJIT().
*/
class CPUProgram : public DeviceProgram
{
public:
/**
* \brief Constructor
* \param device CPU device to which this program is attached
* \param program \c Coal::Program that will be run
*/
CPUProgram(CPUDevice *device, Program *program);
~CPUProgram();
bool linkStdLib() const;
void createOptimizationPasses(llvm::PassManager *manager,
bool optimize, bool hasBarrier=false);
bool build(llvm::Module *module, std::string *binary_str);
/**
* \brief Initialize an LLVM JIT
*
* This function creates a \c llvm::JIT object to run this program on
* the CPU. A few implementation details :
*
* - The JIT is set not to resolve unknown symbols using \c dlsym().
* This way, a malicious kernel cannot execute arbitrary code on
* the host by declaring \c libc functions and calling them.
* - All the unknown function names are passed to \c getBuiltin() to
* get native built-in implementations.
*
* \return true if success, false otherwise
*/
bool initJIT();
llvm::ExecutionEngine *jit() const; /*!< \brief Current LLVM execution engine */
private:
CPUDevice *p_device;
Program *p_program;
llvm::ExecutionEngine *p_jit;
llvm::Module *p_module;
};
}
#endif
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