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
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23  */
24 
25 #ifndef SHARE_GC_SHARED_C1_MODREFBARRIERSETC1_HPP
26 #define SHARE_GC_SHARED_C1_MODREFBARRIERSETC1_HPP
27 
28 #include "gc/shared/c1/barrierSetC1.hpp"
29 
30 // The ModRefBarrierSetC1 filters away accesses on BasicTypes other
31 // than T_OBJECT/T_ARRAY (oops). The oop accesses call one of the protected
32 // accesses, which are overridden in the concrete BarrierSetAssembler.
33 
34 class ModRefBarrierSetC1 : public BarrierSetC1 {
35 protected:
36   virtual void pre_barrier(LIRAccess& access, LIR_Opr addr_opr,
37                            LIR_Opr pre_val, CodeEmitInfo* info) {}
38   virtual void post_barrier(LIRAccess& access, LIR_OprDesc* addr,
39                             LIR_OprDesc* new_val) {}
40 
41   virtual LIR_Opr resolve_address(LIRAccess& access, bool resolve_in_register);
42 
43   virtual void store_at_resolved(LIRAccess& access, LIR_Opr value);
44 
45   virtual LIR_Opr atomic_cmpxchg_resolved(LIRAccess& access, LIRItem& cmp_value, LIRItem& new_value);
46 
47   virtual LIR_Opr atomic_xchg_resolved(LIRAccess& access, LIRItem& value);
48 };
49 
50 #endif // SHARE_GC_SHARED_C1_MODREFBARRIERSETC1_HPP