1 /*
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  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
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 24 
 25 #ifndef CPU_AARCH64_GC_SHARED_BARRIERSETASSEMBLER_AARCH64_HPP
 26 #define CPU_AARCH64_GC_SHARED_BARRIERSETASSEMBLER_AARCH64_HPP
 27 
 28 #include "asm/macroAssembler.hpp"
 29 #include "gc/shared/barrierSet.hpp"
 30 #include "gc/shared/barrierSetNMethod.hpp"
 31 #include "memory/allocation.hpp"
 32 #include "oops/access.hpp"
 33 
 34 enum class NMethodPatchingType {
 35   stw_instruction_and_data_patch,
 36   conc_instruction_and_data_patch,
 37   conc_data_patch
 38 };
 39 
 40 class BarrierSetAssembler: public CHeapObj<mtGC> {
 41 private:
 42   void incr_allocated_bytes(MacroAssembler* masm,
 43                             Register var_size_in_bytes, int con_size_in_bytes,
 44                             Register t1 = noreg);
 45 
 46 public:
 47   virtual void arraycopy_prologue(MacroAssembler* masm, DecoratorSet decorators, bool is_oop,
 48                                   Register src, Register dst, Register count, RegSet saved_regs) {}
 49   virtual void arraycopy_epilogue(MacroAssembler* masm, DecoratorSet decorators, bool is_oop,
 50                                   Register start, Register count, Register tmp, RegSet saved_regs) {}
 51 
 52   virtual void copy_load_at(MacroAssembler* masm,
 53                             DecoratorSet decorators,
 54                             BasicType type,
 55                             size_t bytes,
 56                             Register dst1,
 57                             Register dst2,
 58                             Address src,
 59                             Register tmp);
 60 
 61   virtual void copy_store_at(MacroAssembler* masm,
 62                              DecoratorSet decorators,
 63                              BasicType type,
 64                              size_t bytes,
 65                              Address dst,
 66                              Register src1,
 67                              Register src2,
 68                              Register tmp1,
 69                              Register tmp2,
 70                              Register tmp3);
 71 
 72   virtual void copy_load_at(MacroAssembler* masm,
 73                             DecoratorSet decorators,
 74                             BasicType type,
 75                             size_t bytes,
 76                             FloatRegister dst1,
 77                             FloatRegister dst2,
 78                             Address src,
 79                             Register tmp1,
 80                             Register tmp2,
 81                             FloatRegister vec_tmp);
 82 
 83   virtual void copy_store_at(MacroAssembler* masm,
 84                              DecoratorSet decorators,
 85                              BasicType type,
 86                              size_t bytes,
 87                              Address dst,
 88                              FloatRegister src1,
 89                              FloatRegister src2,
 90                              Register tmp1,
 91                              Register tmp2,
 92                              Register tmp3,
 93                              FloatRegister vec_tmp1,
 94                              FloatRegister vec_tmp2,
 95                              FloatRegister vec_tmp3);
 96 
 97   virtual void load_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
 98                        Register dst, Address src, Register tmp1, Register tmp2);
 99   virtual void store_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
100                         Address dst, Register val, Register tmp1, Register tmp2, Register tmp3);
101 
102   virtual void value_copy(MacroAssembler* masm, DecoratorSet decorators,
103                           Register src, Register dst, Register value_klass);
104 
105   virtual void try_resolve_jobject_in_native(MacroAssembler* masm, Register jni_env,
106                                              Register obj, Register tmp, Label& slowpath);
107 
108   virtual void tlab_allocate(MacroAssembler* masm,
109     Register obj,                      // result: pointer to object after successful allocation
110     Register var_size_in_bytes,        // object size in bytes if unknown at compile time; invalid otherwise
111     int      con_size_in_bytes,        // object size in bytes if   known at compile time
112     Register t1,                       // temp register
113     Register t2,                       // temp register
114     Label&   slow_case                 // continuation point if fast allocation fails
115   );
116 
117   virtual void barrier_stubs_init() {}
118 
119   virtual NMethodPatchingType nmethod_patching_type() { return NMethodPatchingType::stw_instruction_and_data_patch; }
120 
121   virtual void nmethod_entry_barrier(MacroAssembler* masm, Label* slow_path, Label* continuation, Label* guard);
122   virtual void c2i_entry_barrier(MacroAssembler* masm);
123 
124   virtual void check_oop(MacroAssembler* masm, Register obj, Register tmp1, Register tmp2, Label& error);
125 
126   virtual bool supports_instruction_patching() {
127     NMethodPatchingType patching_type = nmethod_patching_type();
128     return patching_type == NMethodPatchingType::conc_instruction_and_data_patch ||
129             patching_type == NMethodPatchingType::stw_instruction_and_data_patch;
130   }
131 
132   static address patching_epoch_addr();
133   static void clear_patching_epoch();
134   static void increment_patching_epoch();
135 };
136 
137 #endif // CPU_AARCH64_GC_SHARED_BARRIERSETASSEMBLER_AARCH64_HPP