1 /*
   2  * Copyright (c) 2018, 2019, Red Hat, Inc. 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/shenandoah/shenandoahBarrierSet.inline.hpp"
  27 #include "gc/shenandoah/shenandoahBarrierSetClone.inline.hpp"
  28 #include "gc/shenandoah/shenandoahRuntime.hpp"
  29 #include "gc/shenandoah/shenandoahThreadLocalData.hpp"
  30 #include "runtime/interfaceSupport.inline.hpp"
  31 #include "oops/oop.inline.hpp"
  32 #include "utilities/copy.hpp"
  33 
  34 void ShenandoahRuntime::write_ref_array_pre_oop_entry(oop* src, oop* dst, size_t length) {
  35   ShenandoahBarrierSet *bs = ShenandoahBarrierSet::barrier_set();
  36   bs->arraycopy_pre(src, dst, length);
  37 }
  38 
  39 void ShenandoahRuntime::write_ref_array_pre_narrow_oop_entry(narrowOop* src, narrowOop* dst, size_t length) {
  40   ShenandoahBarrierSet *bs = ShenandoahBarrierSet::barrier_set();
  41   bs->arraycopy_pre(src, dst, length);
  42 }
  43 
  44 void ShenandoahRuntime::write_ref_array_pre_duinit_oop_entry(oop* src, oop* dst, size_t length) {
  45   ShenandoahBarrierSet *bs = ShenandoahBarrierSet::barrier_set();
  46   bs->arraycopy_update(src, length);
  47 }
  48 
  49 void ShenandoahRuntime::write_ref_array_pre_duinit_narrow_oop_entry(narrowOop* src, narrowOop* dst, size_t length) {
  50   ShenandoahBarrierSet *bs = ShenandoahBarrierSet::barrier_set();
  51   bs->arraycopy_update(src, length);
  52 }
  53 
  54 // Shenandoah pre write barrier slowpath
  55 JRT_LEAF(void, ShenandoahRuntime::write_ref_field_pre_entry(oopDesc* orig, JavaThread *thread))
  56   if (orig == NULL) {
  57     assert(false, "should be optimized out");
  58     return;
  59   }
  60   shenandoah_assert_correct(NULL, orig);
  61   // store the original value that was in the field reference
  62   assert(ShenandoahThreadLocalData::satb_mark_queue(thread).is_active(), "Shouldn't be here otherwise");
  63   ShenandoahThreadLocalData::satb_mark_queue(thread).enqueue_known_active(orig);
  64 JRT_END
  65 
  66 JRT_LEAF(oopDesc*, ShenandoahRuntime::load_reference_barrier(oopDesc* src, oop* load_addr))
  67   return ShenandoahBarrierSet::barrier_set()->load_reference_barrier_mutator(src, load_addr);
  68 JRT_END
  69 
  70 JRT_LEAF(oopDesc*, ShenandoahRuntime::load_reference_barrier_narrow(oopDesc* src, narrowOop* load_addr))
  71   return ShenandoahBarrierSet::barrier_set()->load_reference_barrier_mutator(src, load_addr);
  72 JRT_END
  73 
  74 // Shenandoah clone barrier: makes sure that references point to to-space
  75 // in cloned objects.
  76 JRT_LEAF(void, ShenandoahRuntime::shenandoah_clone_barrier(oopDesc* src))
  77   oop s = oop(src);
  78   shenandoah_assert_correct(NULL, s);
  79   ShenandoahBarrierSet::barrier_set()->clone_barrier(s);
  80 JRT_END
  81 
  82 JRT_LEAF(oopDesc*, ShenandoahRuntime::load_reference_barrier_native(oopDesc * src, oop* load_addr))
  83   return (oopDesc*) ShenandoahBarrierSet::barrier_set()->load_reference_barrier_native(oop(src), load_addr);
  84 JRT_END