rev 52354 : 8213199: GC abstraction for Assembler::needs_explicit_null_check()

   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_SPARC_GC_SHARED_BARRIERSETASSEMBLER_SPARC_HPP
  26 #define CPU_SPARC_GC_SHARED_BARRIERSETASSEMBLER_SPARC_HPP
  27 
  28 #include "asm/macroAssembler.hpp"
  29 #include "memory/allocation.hpp"
  30 #include "oops/access.hpp"
  31 
  32 class InterpreterMacroAssembler;
  33 
  34 class BarrierSetAssembler: public CHeapObj<mtGC> {
  35 public:
  36   virtual void arraycopy_prologue(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
  37                                   Register src, Register dst, Register count) {}
  38   virtual void arraycopy_epilogue(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
  39                                   Register src, Register dst, Register count) {}
  40 
  41   virtual void store_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
  42                         Register src, Address dst, Register tmp);
  43 
  44   virtual void load_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
  45                        Address src, Register dst, Register tmp);
  46 
  47   // Support for jniFastGetField to try resolving a jobject/jweak in native
  48   virtual void try_resolve_jobject_in_native(MacroAssembler* masm, Register jni_env,
  49                                              Register obj, Register tmp, Label& slowpath);
  50 
  51   virtual void barrier_stubs_init() {}
  52 
  53   virtual bool needs_explicit_null_check(intptr_t offset) const;
  54 };
  55 
  56 #endif // CPU_SPARC_GC_SHARED_BARRIERSETASSEMBLER_SPARC_HPP
--- EOF ---