1 /*
 2  * Copyright (c) 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 #ifndef SHARE_GC_SHARED_BARRIERSET_INLINE_HPP
25 #define SHARE_GC_SHARED_BARRIERSET_INLINE_HPP
26 
27 #include "gc/shared/barrierSet.hpp"
28 
29 #include "oops/accessDecorators.hpp"
30 #include "oops/arrayOop.hpp"
31 #include "oops/compressedOops.inline.hpp"
32 #include "oops/objArrayOop.inline.hpp"
33 #include "oops/oop.hpp"
34 
35 template <DecoratorSet decorators, typename BarrierSetT>
36 template <typename T>
37 inline bool BarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_arraycopy_in_heap(arrayOop src_obj, size_t src_offset_in_bytes, T* src_raw,
38                                                                                       arrayOop dst_obj, size_t dst_offset_in_bytes, T* dst_raw,
39                                                                                       size_t length) {
40   T* src = arrayOopDesc::obj_offset_to_raw(src_obj, src_offset_in_bytes, src_raw);
41   T* dst = arrayOopDesc::obj_offset_to_raw(dst_obj, dst_offset_in_bytes, dst_raw);
42 
43   if (!HasDecorator<decorators, ARRAYCOPY_CHECKCAST>::value) {
44     // Covariant, copy without checks
45     return Raw::oop_arraycopy(NULL, 0, src, NULL, 0, dst, length);
46   }
47 
48   // Copy each element with checking casts
49   Klass* const dst_klass = objArrayOop(dst_obj)->element_klass();
50   for (const T* const end = src + length; src < end; src++, dst++) {
51     const T elem = *src;
52     if (!oopDesc::is_instanceof_or_null(CompressedOops::decode(elem), dst_klass)) {
53       return false;
54     }
55     *dst = elem;
56   }
57 
58   return true;
59 }
60 
61 #endif // SHARE_GC_SHARED_BARRIERSET_INLINE_HPP