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/shenandoahBarrierSetClone.inline.hpp"
  27 #include "gc/shenandoah/shenandoahRuntime.hpp"
  28 #include "gc/shenandoah/shenandoahThreadLocalData.hpp"
  29 #include "runtime/interfaceSupport.inline.hpp"
  30 #include "oops/oop.inline.hpp"
  31 #include "utilities/copy.hpp"
  32 
  33 void ShenandoahRuntime::arraycopy_barrier_oop_entry(oop* src, oop* dst, size_t length) {
  34   ShenandoahBarrierSet *bs = ShenandoahBarrierSet::barrier_set();
  35   bs->arraycopy_barrier(src, dst, length);
  36 }
  37 
  38 void ShenandoahRuntime::arraycopy_barrier_narrow_oop_entry(narrowOop* src, narrowOop* dst, size_t length) {
  39   ShenandoahBarrierSet *bs = ShenandoahBarrierSet::barrier_set();
  40   bs->arraycopy_barrier(src, dst, length);
  41 }
  42 
  43 // Shenandoah pre write barrier slowpath
  44 JRT_LEAF(void, ShenandoahRuntime::write_ref_field_pre_entry(oopDesc* orig, JavaThread *thread))
  45   assert(orig != NULL, "should be optimized out");
  46   shenandoah_assert_correct(NULL, orig);
  47   // store the original value that was in the field reference
  48   assert(ShenandoahThreadLocalData::satb_mark_queue(thread).is_active(), "Shouldn't be here otherwise");
  49   ShenandoahThreadLocalData::satb_mark_queue(thread).enqueue_known_active(orig);
  50 JRT_END
  51 
  52 JRT_LEAF(oopDesc*, ShenandoahRuntime::load_reference_barrier(oopDesc* src, oop* load_addr))
  53   return ShenandoahBarrierSet::barrier_set()->load_reference_barrier_mutator(src, load_addr);
  54 JRT_END
  55 
  56 JRT_LEAF(oopDesc*, ShenandoahRuntime::load_reference_barrier_narrow(oopDesc* src, narrowOop* load_addr))
  57   return ShenandoahBarrierSet::barrier_set()->load_reference_barrier_mutator(src, load_addr);
  58 JRT_END
  59 
  60 // Shenandoah clone barrier: makes sure that references point to to-space
  61 // in cloned objects.
  62 JRT_LEAF(void, ShenandoahRuntime::shenandoah_clone_barrier(oopDesc* src))
  63   oop s = oop(src);
  64   shenandoah_assert_correct(NULL, s);
  65   ShenandoahBarrierSet::barrier_set()->clone_barrier(s);
  66 JRT_END