1 /* 2 * Copyright (c) 2018, Red Hat, Inc. and/or its affiliates. 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