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 #include "precompiled.hpp"

    26 #include "gc/g1/g1BarrierSet.inline.hpp"

    27 #include "gc/g1/g1BarrierSetRuntime.hpp"

    28 #include "gc/g1/g1ThreadLocalData.hpp"

    29 #include "runtime/interfaceSupport.inline.hpp"

    30 #include "utilities/macros.hpp"

    31 

    32 void G1BarrierSetRuntime::write_ref_array_pre_oop_entry(oop* dst, size_t length) {

    33   G1BarrierSet *bs = barrier_set_cast<G1BarrierSet>(BarrierSet::barrier_set());

    34   bs->write_ref_array_pre(dst, length, false);

    35 }

    36 

    37 void G1BarrierSetRuntime::write_ref_array_pre_narrow_oop_entry(narrowOop* dst, size_t length) {

    38   G1BarrierSet *bs = barrier_set_cast<G1BarrierSet>(BarrierSet::barrier_set());

    39   bs->write_ref_array_pre(dst, length, false);

    40 }

    41 

    42 void G1BarrierSetRuntime::write_ref_array_post_entry(HeapWord* dst, size_t length) {

    43   G1BarrierSet *bs = barrier_set_cast<G1BarrierSet>(BarrierSet::barrier_set());

    44   bs->G1BarrierSet::write_ref_array(dst, length);

    45 }

    46 

    47 // G1 pre write barrier slowpath

    48 JRT_LEAF(void, G1BarrierSetRuntime::write_ref_field_pre_entry(oopDesc* orig, JavaThread *thread))

    49   if (orig == NULL) {

    50     assert(false, "should be optimized out");

    51     return;

    52   }

    53   assert(oopDesc::is_oop(orig, true /* ignore mark word */), "Error");

    54   // store the original value that was in the field reference

    55   G1ThreadLocalData::satb_mark_queue(thread).enqueue(orig);

    56 JRT_END

    57 

    58 // G1 post write barrier slowpath

    59 JRT_LEAF(void, G1BarrierSetRuntime::write_ref_field_post_entry(void* card_addr, JavaThread* thread))

    60   G1ThreadLocalData::dirty_card_queue(thread).enqueue(card_addr);

    61 JRT_END