CodeMemory.hpp

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/* src/vm/jit/compiler2/CodeMemory.hpp - CodeMemory

   Copyright (C) 2013
   CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO

   This file is part of CACAO.

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License as
   published by the Free Software Foundation; either version 2, or (at
   your option) any later version.

   This program is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
   02110-1301, USA.

*/

#ifndef _JIT_COMPILER2_CODEMEMORY
#define _JIT_COMPILER2_CODEMEMORY

#include "vm/jit/compiler2/CodeSegment.hpp"
#include "vm/jit/compiler2/DataSegment.hpp"
#include "vm/types.hpp"

#include "vm/jit/compiler2/memory/Manager.hpp"
#include "vm/jit/compiler2/alloc/map.hpp"
#include "vm/jit/compiler2/alloc/vector.hpp"
#include <cassert>

MM_MAKE_NAME(CodeMemory)

namespace cacao {
namespace jit {
namespace compiler2 {

// forward declarations
class MachineInstruction;

/**
 * CodeMemory
 */
class CodeMemory : public memory::ManagerMixin<CodeMemory>  {
public:
    typedef std::pair<const MachineInstruction*,CodeFragment> ResolvePointTy;
private:
    typedef alloc::list<ResolvePointTy>::type LinkListTy;

    LinkListTy linklist;            ///< instructions that require linking

    CodeSegment cseg;               ///< code segment
    DataSegment dseg;               ///< data segment

public:
    /// constructor
    CodeMemory() : cseg(this), dseg(this) {}

    /// get CodeSegment
    const CodeSegment& get_CodeSegment() const { return cseg; }
    /// get CodeSegment
    CodeSegment& get_CodeSegment()             { return cseg; }
    /// get DataSegment
    const DataSegment& get_DataSegment() const { return dseg; }
    /// get DataSegment
    DataSegment& get_DataSegment()             { return dseg; }

    s4 get_offset(CodeSegment::IdxTy to, CodeSegment::IdxTy from) const;
    s4 get_offset(CodeSegment::IdxTy to, CodeFragment &CF) const {
        return get_offset(to, CF.get_end());
    }
    s4 get_offset(CodeSegment::IdxTy to) const {
        return get_offset(to, cseg.get_following_index());
    }
    /**
     * @deprecated this should be moved to FixedCodeMemory or so
     */
    s4 get_offset(DataSegment::IdxTy to, CodeSegment::IdxTy from) const;
    s4 get_offset(DataSegment::IdxTy to, CodeFragment &CF) const {
        return get_offset(to, CF.get_end());
    }
    /// Add a MachineInstruction that require linking
    void require_linking(const MachineInstruction*, CodeFragment CF);

    /**
     * Link instructions.
     *
     * @deprecated this should be moved to FixedCodeMemory or so
     */
    void link();

    /**
     * get a code fragment
     */
    CodeFragment get_CodeFragment(std::size_t size);

    /**
     * get an aligned code fragment
     *
     * @return A CodeFragment aligend to Target::alignment.
     */
    CodeFragment get_aligned_CodeFragment(std::size_t size);

};


} // end namespace compiler2
} // end namespace jit
} // end namespace cacao

#endif /* _JIT_COMPILER2_CODEMEMORY */


/*
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 * Please do not remove this and leave it at the end of the file, where
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