src/hotspot/cpu/arm/gc/shared/modRefBarrierSetAssembler_arm.hpp

/*
 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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#ifndef CPU_ARM_GC_SHARED_MODREFBARRIERSETASSEMBLER_ARM_HPP
#define CPU_ARM_GC_SHARED_MODREFBARRIERSETASSEMBLER_ARM_HPP

#include "asm/macroAssembler.hpp"
#include "gc/shared/barrierSetAssembler.hpp"

// The ModRefBarrierSetAssembler filters away accesses on BasicTypes other
// than T_OBJECT/T_ARRAY (oops). The oop accesses call one of the protected
// accesses, which are overridden in the concrete BarrierSetAssembler.

class ModRefBarrierSetAssembler: public BarrierSetAssembler {
protected:
  virtual void gen_write_ref_array_pre_barrier(MacroAssembler* masm, DecoratorSet decorators,
                                               Register addr, Register count, int callee_saved_regs) {}
  virtual void gen_write_ref_array_post_barrier(MacroAssembler* masm, DecoratorSet decorators,
                                                Register addr, Register count, Register tmp) {}

  virtual void oop_store_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
                            Address obj, Register val, Register tmp1, Register tmp2, Register tmp3, bool is_null) = 0;

public:
  virtual void arraycopy_prologue(MacroAssembler* masm, DecoratorSet decorators, bool is_oop,
                                  Register addr, Register count, int callee_saved_regs);
  virtual void arraycopy_epilogue(MacroAssembler* masm, DecoratorSet decorators, bool is_oop,
                                  Register addr, Register count, Register tmp);
  virtual void store_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
                        Address obj, Register val, Register tmp1, Register tmp2, Register tmp3, bool is_null);
};

#endif // CPU_ARM_GC_SHARED_MODREFBARRIERSETASSEMBLER_ARM_HPP