1 /* 2 * Copyright (c) 2018, 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 SHARE_GC_SHENANDOAH_C1_SHENANDOAHBARRIERSETC1_HPP 25 #define SHARE_GC_SHENANDOAH_C1_SHENANDOAHBARRIERSETC1_HPP 26 27 #include "c1/c1_CodeStubs.hpp" 28 #include "memory/allocation.hpp" 29 30 class LIRGenerator; 31 32 class ShenandoahLoadReferenceBarrierStub: public CodeStub { 33 friend class ShenandoahBarrierSetC1; 34 private: 35 LIR_Opr _obj; 36 LIR_Opr _result; 37 CodeEmitInfo* _info; 38 bool _needs_null_check; 39 40 public: 41 ShenandoahLoadReferenceBarrierStub(LIR_Opr obj, LIR_Opr result, CodeEmitInfo* info, bool needs_null_check) : 42 _obj(obj), _result(result), _info(info), _needs_null_check(needs_null_check) 43 { 44 assert(_obj->is_register(), "should be register"); 45 assert(_result->is_register(), "should be register"); 46 } 47 48 LIR_Opr obj() const { return _obj; } 49 LIR_Opr result() const { return _result; } 50 CodeEmitInfo* info() const { return _info; } 51 bool needs_null_check() const { return _needs_null_check; } 52 53 virtual void emit_code(LIR_Assembler* e); 54 virtual void visit(LIR_OpVisitState* visitor) { 55 visitor->do_slow_case(); 56 visitor->do_input(_obj); 57 visitor->do_temp(_result); 58 } 59 #ifndef PRODUCT 60 virtual void print_name(outputStream* out) const { out->print("ShenandoahLoadReferenceBarrierStub"); } 61 #endif // PRODUCT 62 }; 63 64 class ShenandoahBarrierSetC1 : public CHeapObj<mtGC>{ 65 public: 66 static ShenandoahBarrierSetC1* bsc1(); 67 68 LIR_Opr load_reference_barrier(LIRGenerator* gen, LIR_Opr obj, CodeEmitInfo* info, bool need_null_check); 69 private: 70 LIR_Opr load_reference_barrier_impl(LIRGenerator* gen, LIR_Opr obj, CodeEmitInfo* info, bool need_null_check); 71 LIR_Opr ensure_in_register(LIRGenerator* gen, LIR_Opr obj); 72 73 }; 74 75 #endif // SHARE_GC_SHENANDOAH_C1_SHENANDOAHBARRIERSETC1_HPP