1 /*
   2  * Copyright (c) 2018, 2019, Red Hat, Inc. All rights reserved.
   3  *
   4  * This code is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License version 2 only, as
   6  * published by the Free Software Foundation.
   7  *
   8  * This code is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  11  * version 2 for more details (a copy is included in the LICENSE file that
  12  * accompanied this code).
  13  *
  14  * You should have received a copy of the GNU General Public License version
  15  * 2 along with this work; if not, write to the Free Software Foundation,
  16  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  17  *
  18  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  19  * or visit www.oracle.com if you need additional information or have any
  20  * questions.
  21  *
  22  */
  23 
  24 #ifndef CPU_AARCH64_GC_SHENANDOAH_SHENANDOAHBARRIERSETASSEMBLER_AARCH64_HPP
  25 #define CPU_AARCH64_GC_SHENANDOAH_SHENANDOAHBARRIERSETASSEMBLER_AARCH64_HPP
  26 
  27 #include "asm/macroAssembler.hpp"
  28 #include "gc/shared/barrierSetAssembler.hpp"
  29 #ifdef COMPILER1
  30 class LIR_Assembler;
  31 class ShenandoahPreBarrierStub;
  32 class ShenandoahLoadReferenceBarrierStub;
  33 class StubAssembler;
  34 #endif
  35 class StubCodeGenerator;
  36 
  37 class ShenandoahBarrierSetAssembler: public BarrierSetAssembler {
  38 private:
  39 
  40   static address _shenandoah_lrb;
  41 
  42   void satb_write_barrier_pre(MacroAssembler* masm,
  43                               Register obj,
  44                               Register pre_val,
  45                               Register thread,
  46                               Register tmp,
  47                               bool tosca_live,
  48                               bool expand_call);
  49   void shenandoah_write_barrier_pre(MacroAssembler* masm,
  50                                     Register obj,
  51                                     Register pre_val,
  52                                     Register thread,
  53                                     Register tmp,
  54                                     bool tosca_live,
  55                                     bool expand_call);
  56 
  57   void resolve_forward_pointer(MacroAssembler* masm, Register dst, Register tmp = noreg);
  58   void resolve_forward_pointer_not_null(MacroAssembler* masm, Register dst, Register tmp = noreg);
  59   void load_reference_barrier(MacroAssembler* masm, Register dst, Register tmp);
  60   void load_reference_barrier_not_null(MacroAssembler* masm, Register dst, Register tmp);
  61   void load_reference_barrier_native(MacroAssembler* masm, Register dst, Register tmp);
  62 
  63   address generate_shenandoah_lrb(StubCodeGenerator* cgen);
  64 
  65   // Generate cset check. If obj is in cset, branch to in_cset label, otherwise fall through
  66   // obj: Register holding the oop, preserved
  67   // tmp1, tmp2: temp registers, trashed
  68   void gen_cset_check(MacroAssembler* masm, Register obj, Register tmp1, Register tmp2, Label& in_cset);
  69 
  70   // Generate check if object is resolved. Branch to not_resolved label, if not. Otherwise return resolved
  71   // object in obj register.
  72   // obj: object, resolved object on normal return
  73   // tmp1, tmp2: temp registers, trashed
  74   void gen_resolved_check(MacroAssembler* masm, Register obj, Register tmp1, Register tmp2, Label& resolved);
  75 
  76 public:
  77   static address shenandoah_lrb();
  78 
  79   void storeval_barrier(MacroAssembler* masm, Register dst, Register tmp);
  80 
  81 #ifdef COMPILER1
  82   void gen_pre_barrier_stub(LIR_Assembler* ce, ShenandoahPreBarrierStub* stub);
  83   void gen_load_reference_barrier_stub(LIR_Assembler* ce, ShenandoahLoadReferenceBarrierStub* stub);
  84   void generate_c1_pre_barrier_runtime_stub(StubAssembler* sasm);
  85   void generate_c1_load_reference_barrier_runtime_stub(StubAssembler* sasm);
  86 #endif
  87 
  88   virtual void arraycopy_prologue(MacroAssembler* masm, DecoratorSet decorators, bool is_oop,
  89                                   Register src, Register dst, Register count, RegSet saved_regs);
  90   virtual void arraycopy_epilogue(MacroAssembler* masm, DecoratorSet decorators, bool is_oop,
  91                                   Register start, Register count, Register tmp, RegSet saved_regs);
  92   virtual void load_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
  93                        Register dst, Address src, Register tmp1, Register tmp_thread);
  94   virtual void store_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
  95                         Address dst, Register val, Register tmp1, Register tmp2);
  96   void cmpxchg_oop(MacroAssembler* masm, Register addr, Register expected, Register new_val,
  97                    bool acquire, bool release, bool weak, bool is_cae, Register result);
  98 
  99   virtual void barrier_stubs_init();
 100 };
 101 
 102 #endif // CPU_AARCH64_GC_SHENANDOAH_SHENANDOAHBARRIERSETASSEMBLER_AARCH64_HPP