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 #include "precompiled.hpp"

    25 #include "gc/shenandoah/shenandoahBarrierSet.hpp"

    26 #include "gc/shenandoah/shenandoahRuntime.hpp"

    27 #include "gc/shenandoah/shenandoahThreadLocalData.hpp"

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

    29 #include "oops/oop.inline.hpp"

    30 

    31 void ShenandoahRuntime::write_ref_array_pre_oop_entry(oop* dst, size_t length) {

    32   ShenandoahBarrierSet *bs = ShenandoahBarrierSet::barrier_set();

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

    34 }

    35 

    36 void ShenandoahRuntime::write_ref_array_pre_narrow_oop_entry(narrowOop* dst, size_t length) {

    37   ShenandoahBarrierSet *bs = ShenandoahBarrierSet::barrier_set();

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

    39 }

    40 

    41 void ShenandoahRuntime::write_ref_array_post_entry(HeapWord* dst, size_t length) {

    42   ShenandoahBarrierSet *bs = ShenandoahBarrierSet::barrier_set();

    43   bs->ShenandoahBarrierSet::write_ref_array(dst, length);

    44 }

    45 

    46 // Shenandoah pre write barrier slowpath

    47 JRT_LEAF(void, ShenandoahRuntime::write_ref_field_pre_entry(oopDesc* orig, JavaThread *thread))

    48   if (orig == NULL) {

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

    50     return;

    51   }

    52   shenandoah_assert_correct(NULL, orig);

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

    54   ShenandoahThreadLocalData::satb_mark_queue(thread).enqueue(orig);

    55 JRT_END

    56 

    57 JRT_LEAF(oopDesc*, ShenandoahRuntime::write_barrier_JRT(oopDesc* src))

    58   oop result = ShenandoahBarrierSet::barrier_set()->write_barrier_mutator(src);

    59   return (oopDesc*) result;

    60 JRT_END

    61 

    62 // Shenandoah clone barrier: makes sure that references point to to-space

    63 // in cloned objects.

    64 JRT_LEAF(void, ShenandoahRuntime::shenandoah_clone_barrier(oopDesc* obj))

    65   ShenandoahBarrierSet::barrier_set()->write_region(MemRegion((HeapWord*) obj, obj->size()));

    66 JRT_END