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 SHARE_GC_G1_C1_G1BARRIERSETC1_HPP 26 #define SHARE_GC_G1_C1_G1BARRIERSETC1_HPP 27 28 #include "c1/c1_CodeStubs.hpp" 29 #include "gc/shared/c1/modRefBarrierSetC1.hpp" 30 31 class G1PreBarrierStub: public CodeStub { 32 friend class G1BarrierSetC1; 33 private: 34 bool _do_load; 35 LIR_Opr _addr; 36 LIR_Opr _pre_val; 37 LIR_PatchCode _patch_code; 38 CodeEmitInfo* _info; 39 40 public: 41 // Version that _does_ generate a load of the previous value from addr. 42 // addr (the address of the field to be read) must be a LIR_Address 43 // pre_val (a temporary register) must be a register; G1PreBarrierStub(LIR_Opr addr,LIR_Opr pre_val,LIR_PatchCode patch_code,CodeEmitInfo * info)44 G1PreBarrierStub(LIR_Opr addr, LIR_Opr pre_val, LIR_PatchCode patch_code, CodeEmitInfo* info) : 45 _do_load(true), _addr(addr), _pre_val(pre_val), 46 _patch_code(patch_code), _info(info) 47 { 48 assert(_pre_val->is_register(), "should be temporary register"); 49 assert(_addr->is_address(), "should be the address of the field"); 50 } 51 52 // Version that _does not_ generate load of the previous value; the 53 // previous value is assumed to have already been loaded into pre_val. G1PreBarrierStub(LIR_Opr pre_val)54 G1PreBarrierStub(LIR_Opr pre_val) : 55 _do_load(false), _addr(LIR_OprFact::illegalOpr), _pre_val(pre_val), 56 _patch_code(lir_patch_none), _info(NULL) 57 { 58 assert(_pre_val->is_register(), "should be a register"); 59 } 60 addr() const61 LIR_Opr addr() const { return _addr; } pre_val() const62 LIR_Opr pre_val() const { return _pre_val; } patch_code() const63 LIR_PatchCode patch_code() const { return _patch_code; } info() const64 CodeEmitInfo* info() const { return _info; } do_load() const65 bool do_load() const { return _do_load; } 66 67 virtual void emit_code(LIR_Assembler* e); visit(LIR_OpVisitState * visitor)68 virtual void visit(LIR_OpVisitState* visitor) { 69 if (_do_load) { 70 // don't pass in the code emit info since it's processed in the fast 71 // path 72 if (_info != NULL) 73 visitor->do_slow_case(_info); 74 else 75 visitor->do_slow_case(); 76 77 visitor->do_input(_addr); 78 visitor->do_temp(_pre_val); 79 } else { 80 visitor->do_slow_case(); 81 visitor->do_input(_pre_val); 82 } 83 } 84 #ifndef PRODUCT print_name(outputStream * out) const85 virtual void print_name(outputStream* out) const { out->print("G1PreBarrierStub"); } 86 #endif // PRODUCT 87 }; 88 89 class G1PostBarrierStub: public CodeStub { 90 friend class G1BarrierSetC1; 91 private: 92 LIR_Opr _addr; 93 LIR_Opr _new_val; 94 95 public: 96 // addr (the address of the object head) and new_val must be registers. G1PostBarrierStub(LIR_Opr addr,LIR_Opr new_val)97 G1PostBarrierStub(LIR_Opr addr, LIR_Opr new_val): _addr(addr), _new_val(new_val) { } 98 addr() const99 LIR_Opr addr() const { return _addr; } new_val() const100 LIR_Opr new_val() const { return _new_val; } 101 102 virtual void emit_code(LIR_Assembler* e); visit(LIR_OpVisitState * visitor)103 virtual void visit(LIR_OpVisitState* visitor) { 104 // don't pass in the code emit info since it's processed in the fast path 105 visitor->do_slow_case(); 106 visitor->do_input(_addr); 107 visitor->do_input(_new_val); 108 } 109 #ifndef PRODUCT print_name(outputStream * out) const110 virtual void print_name(outputStream* out) const { out->print("G1PostBarrierStub"); } 111 #endif // PRODUCT 112 }; 113 114 class CodeBlob; 115 116 class G1BarrierSetC1 : public ModRefBarrierSetC1 { 117 protected: 118 CodeBlob* _pre_barrier_c1_runtime_code_blob; 119 CodeBlob* _post_barrier_c1_runtime_code_blob; 120 121 virtual void pre_barrier(LIRAccess& access, LIR_Opr addr_opr, 122 LIR_Opr pre_val, CodeEmitInfo* info); 123 virtual void post_barrier(LIRAccess& access, LIR_OprDesc* addr, LIR_OprDesc* new_val); 124 125 virtual void load_at_resolved(LIRAccess& access, LIR_Opr result); 126 127 public: G1BarrierSetC1()128 G1BarrierSetC1() 129 : _pre_barrier_c1_runtime_code_blob(NULL), 130 _post_barrier_c1_runtime_code_blob(NULL) {} 131 pre_barrier_c1_runtime_code_blob()132 CodeBlob* pre_barrier_c1_runtime_code_blob() { return _pre_barrier_c1_runtime_code_blob; } post_barrier_c1_runtime_code_blob()133 CodeBlob* post_barrier_c1_runtime_code_blob() { return _post_barrier_c1_runtime_code_blob; } 134 135 virtual void generate_c1_runtime_stubs(BufferBlob* buffer_blob); 136 }; 137 138 #endif // SHARE_GC_G1_C1_G1BARRIERSETC1_HPP 139