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
31void 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
36void 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
41void 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
47JRT_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 assert(ShenandoahThreadLocalData::satb_mark_queue(thread).is_active(), "Shouldn't be here otherwise");
55 ShenandoahThreadLocalData::satb_mark_queue(thread).enqueue_known_active(orig);
56JRT_END
57
58JRT_LEAF(oopDesc*, ShenandoahRuntime::load_reference_barrier_JRT(oopDesc* src))
59 oop result = ShenandoahBarrierSet::barrier_set()->load_reference_barrier_mutator(src);
60 return (oopDesc*) result;
61JRT_END
62
63// Shenandoah clone barrier: makes sure that references point to to-space
64// in cloned objects.
65JRT_LEAF(void, ShenandoahRuntime::shenandoah_clone_barrier(oopDesc* obj))
66 ShenandoahBarrierSet::barrier_set()->write_region(MemRegion((HeapWord*) obj, obj->size()));
67JRT_END
68