1 /*
   2  * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef CPU_ARM_GC_SHARED_BARRIERSETASSEMBLER_ARM_HPP
  26 #define CPU_ARM_GC_SHARED_BARRIERSETASSEMBLER_ARM_HPP
  27 
  28 #include "asm/macroAssembler.hpp"
  29 #include "memory/allocation.hpp"
  30 #include "oops/access.hpp"
  31 
  32 class BarrierSetAssembler: public CHeapObj<mtGC> {
  33 private:
  34   void incr_allocated_bytes(MacroAssembler* masm,
  35     RegisterOrConstant size_in_bytes,
  36     Register           tmp
  37 );
  38 
  39 public:
  40   virtual void arraycopy_prologue(MacroAssembler* masm, DecoratorSet decorators, bool is_oop,
  41                                   Register addr, Register count, int callee_saved_regs) {}
  42   virtual void arraycopy_epilogue(MacroAssembler* masm, DecoratorSet decorators, bool is_oop,
  43                                   Register addr, Register count, Register tmp) {}
  44 
  45   virtual void load_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
  46                        Register dst, Address src, Register tmp1, Register tmp2, Register tmp3);
  47   virtual void store_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
  48                         Address obj, Register new_val, Register tmp1, Register tmp2, Register tmp3, bool is_null);
  49 
  50   virtual void obj_equals(MacroAssembler* masm,
  51                           Register obj1, Register obj2);
  52 
  53   virtual void eden_allocate(MacroAssembler* masm,
  54     Register           obj,              // result: pointer to object after successful allocation
  55     Register           obj_end,          // result: pointer to end of object after successful allocation
  56     Register           tmp1,             // temp register
  57     Register           tmp2,             // temp register
  58     RegisterOrConstant size_expression,  // size of object
  59     Label&             slow_case         // continuation point if fast allocation fails
  60   );
  61 
  62   virtual void tlab_allocate(MacroAssembler* masm,
  63     Register           obj,              // result: pointer to object after successful allocation
  64     Register           obj_end,          // result: pointer to end of object after successful allocation
  65     Register           tmp1,             // temp register
  66     RegisterOrConstant size_expression,  // size of object
  67     Label&             slow_case         // continuation point if fast allocation fails
  68   );
  69 
  70   virtual void barrier_stubs_init() {}
  71 
  72   virtual void resolve(MacroAssembler* masm, DecoratorSet decorators, Register obj) {
  73     // Default implementation does not need to do anything.
  74   }
  75 
  76   virtual bool needs_explicit_null_check(intptr_t offset) const;
  77 };
  78 
  79 #endif // CPU_ARM_GC_SHARED_BARRIERSETASSEMBLER_ARM_HPP
--- EOF ---