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_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_at_resolved(LIRAccess& access, LIRItem& cmp_value, LIRItem& new_value);

    46 

    47   virtual LIR_Opr atomic_xchg_at_resolved(LIRAccess& access, LIRItem& value);

    48 };

    49 

    50 #endif // SHARE_GC_SHARED_C1_MODREFBARRIERSETC1_HPP