1 /* 2 * Copyright (c) 2018, 2022, 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_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