1 /*
   2  * Copyright (c) 2018, Red Hat, Inc. and/or its affiliates.
   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 ShenandoahWriteBarrierStub;
  33 class StubAssembler;
  34 class StubCodeGenerator;
  35 #endif
  36 
  37 class ShenandoahBarrierSetAssembler: public BarrierSetAssembler {
  38 private:
  39 
  40   static address _shenandoah_wb;
  41   static address _shenandoah_wb_C;
  42 
  43   void satb_write_barrier_pre(MacroAssembler* masm,
  44                               Register obj,
  45                               Register pre_val,
  46                               Register thread,
  47                               Register tmp,
  48                               bool tosca_live,
  49                               bool expand_call);
  50   void shenandoah_write_barrier_pre(MacroAssembler* masm,
  51                                     Register obj,
  52                                     Register pre_val,
  53                                     Register thread,
  54                                     Register tmp,
  55                                     bool tosca_live,
  56                                     bool expand_call);
  57 
  58   void read_barrier(MacroAssembler* masm, Register dst);
  59   void read_barrier_impl(MacroAssembler* masm, Register dst);
  60   void read_barrier_not_null(MacroAssembler* masm, Register dst);
  61   void read_barrier_not_null_impl(MacroAssembler* masm, Register dst);
  62   void write_barrier(MacroAssembler* masm, Register dst);
  63   void write_barrier_impl(MacroAssembler* masm, Register dst);
  64   void storeval_barrier(MacroAssembler* masm, Register dst, Register tmp);
  65   void asm_acmp_barrier(MacroAssembler* masm, Register op1, Register op2);
  66 
  67   address generate_shenandoah_wb(StubCodeGenerator* cgen, bool c_abi, bool do_cset_test);
  68 
  69 public:
  70   static address shenandoah_wb();
  71   static address shenandoah_wb_C();
  72 
  73   static bool is_shenandoah_wb_C_call(address call);
  74 
  75 #ifdef COMPILER1
  76   void gen_pre_barrier_stub(LIR_Assembler* ce, ShenandoahPreBarrierStub* stub);
  77   void gen_write_barrier_stub(LIR_Assembler* ce, ShenandoahWriteBarrierStub* stub);
  78   void generate_c1_pre_barrier_runtime_stub(StubAssembler* sasm);
  79 #endif
  80 
  81   virtual void arraycopy_prologue(MacroAssembler* masm, DecoratorSet decorators, bool is_oop,
  82                                   Register addr, Register count, RegSet saved_regs);
  83   virtual void arraycopy_epilogue(MacroAssembler* masm, DecoratorSet decorators, bool is_oop,
  84                                   Register start, Register end, Register tmp, RegSet saved_regs);
  85   virtual void load_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
  86                        Register dst, Address src, Register tmp1, Register tmp_thread);
  87   virtual void store_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
  88                         Address dst, Register val, Register tmp1, Register tmp2);
  89   virtual void obj_equals(MacroAssembler* masm, Register src1, Register src2);
  90   virtual void resolve(MacroAssembler* masm, DecoratorSet decorators, Register obj);
  91   virtual void tlab_allocate(MacroAssembler* masm, Register obj,
  92                              Register var_size_in_bytes,
  93                              int con_size_in_bytes,
  94                              Register t1,
  95                              Register t2,
  96                              Label& slow_case);
  97 
  98   void cmpxchg_oop(MacroAssembler* masm, Register addr, Register expected, Register new_val,
  99                    bool acquire, bool release, bool weak, bool encode,
 100                    Register tmp1, Register tmp2, Register tmp3 = rscratch2,
 101                    Register result = noreg);
 102 
 103   virtual bool needs_explicit_null_check(intptr_t offset);
 104 
 105   virtual void barrier_stubs_init();
 106 };
 107 
 108 #endif // CPU_AARCH64_GC_SHENANDOAH_SHENANDOAHBARRIERSETASSEMBLER_AARCH64_HPP