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.inline.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* src, oop* dst, size_t length) {
  32   ShenandoahBarrierSet *bs = ShenandoahBarrierSet::barrier_set();
  33   bs->arraycopy_pre(src, dst, length);
  34 }
  35 
  36 void ShenandoahRuntime::write_ref_array_pre_narrow_oop_entry(narrowOop* src, narrowOop* dst, size_t length) {
  37   ShenandoahBarrierSet *bs = ShenandoahBarrierSet::barrier_set();
  38   bs->arraycopy_pre(src, dst, length);
  39 }
  40 
  41 void ShenandoahRuntime::write_ref_array_pre_duinit_oop_entry(oop* src, oop* dst, size_t length) {
  42   ShenandoahBarrierSet *bs = ShenandoahBarrierSet::barrier_set();
  43   bs->arraycopy_update(src, length);
  44 }
  45 
  46 void ShenandoahRuntime::write_ref_array_pre_duinit_narrow_oop_entry(narrowOop* src, narrowOop* dst, size_t length) {
  47   ShenandoahBarrierSet *bs = ShenandoahBarrierSet::barrier_set();
  48   bs->arraycopy_update(src, length);
  49 }
  50 
  51 // Shenandoah pre write barrier slowpath
  52 JRT_LEAF(void, ShenandoahRuntime::write_ref_field_pre_entry(oopDesc* orig, JavaThread *thread))
  53   if (orig == NULL) {
  54     assert(false, "should be optimized out");
  55     return;
  56   }
  57   shenandoah_assert_correct(NULL, orig);
  58   // store the original value that was in the field reference
  59   assert(ShenandoahThreadLocalData::satb_mark_queue(thread).is_active(), "Shouldn't be here otherwise");
  60   ShenandoahThreadLocalData::satb_mark_queue(thread).enqueue_known_active(orig);
  61 JRT_END
  62 
  63 JRT_LEAF(oopDesc*, ShenandoahRuntime::load_reference_barrier(oopDesc* src))
  64   return ShenandoahBarrierSet::barrier_set()->load_reference_barrier_mutator(src, (oop*)NULL);
  65 JRT_END
  66 
  67 JRT_LEAF(oopDesc*, ShenandoahRuntime::load_reference_barrier_fixup(oopDesc* src, oop* load_addr))
  68   return ShenandoahBarrierSet::barrier_set()->load_reference_barrier_mutator(src, load_addr);
  69 JRT_END
  70 
  71 JRT_LEAF(oopDesc*, ShenandoahRuntime::load_reference_barrier_fixup_narrow(oopDesc* src, narrowOop* load_addr))
  72   return ShenandoahBarrierSet::barrier_set()->load_reference_barrier_mutator(src, load_addr);
  73 JRT_END
  74 
  75 // Shenandoah clone barrier: makes sure that references point to to-space
  76 // in cloned objects.
  77 JRT_LEAF(void, ShenandoahRuntime::shenandoah_clone_barrier(oopDesc* s, oopDesc* d, size_t length))
  78   oop src = oop(s);
  79   oop dst = oop(d);
  80   shenandoah_assert_correct(NULL, src);
  81   shenandoah_assert_correct(NULL, dst);
  82   ShenandoahBarrierSet::barrier_set()->clone_barrier(src);
  83   RawAccessBarrier<IS_NOT_NULL>::clone(src, dst, length);
  84 JRT_END
  85 
  86 JRT_LEAF(oopDesc*, ShenandoahRuntime::load_reference_barrier_native(oopDesc * src))
  87   return (oopDesc*) ShenandoahBarrierSet::barrier_set()->oop_load_from_native_barrier(oop(src));
  88 JRT_END
--- EOF ---