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_VM_GC_SHARED_BARRIERSET_INLINE_HPP

    25 #define SHARE_VM_GC_SHARED_BARRIERSET_INLINE_HPP

    26 

    27 #include "gc/shared/barrierSet.hpp"

    28 #include "oops/accessDecorators.hpp"

    29 #include "oops/arrayOop.hpp"

    30 #include "oops/compressedOops.inline.hpp"

    31 #include "oops/objArrayOop.inline.hpp"

    32 #include "oops/oop.hpp"

    33 

    34 template <DecoratorSet decorators, typename BarrierSetT>

    35 template <typename T>

    36 inline bool BarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_arraycopy_in_heap(arrayOop src_obj, size_t src_offset_in_bytes, T* src_raw,

    37                                                                                       arrayOop dst_obj, size_t dst_offset_in_bytes, T* dst_raw,

    38                                                                                       size_t length) {

    39   T* src = arrayOopDesc::obj_offset_to_raw(src_obj, src_offset_in_bytes, src_raw);

    40   T* dst = arrayOopDesc::obj_offset_to_raw(dst_obj, dst_offset_in_bytes, dst_raw);

    41 

    42   if (!HasDecorator<decorators, ARRAYCOPY_CHECKCAST>::value) {

    43     // Covariant, copy without checks

    44     return Raw::oop_arraycopy(NULL, 0, src, NULL, 0, dst, length);

    45   }

    46 

    47   // Copy each element with checking casts

    48   Klass* const dst_klass = objArrayOop(dst_obj)->element_klass();

    49   for (const T* const end = src + length; src < end; src++, dst++) {

    50     const T elem = *src;

    51     if (!oopDesc::is_instanceof_or_null(CompressedOops::decode(elem), dst_klass)) {

    52       return false;

    53     }

    54     *dst = elem;

    55   }

    56 

    57   return true;

    58 }

    59 

    60 #endif // SHARE_VM_GC_SHARED_BARRIERSET_INLINE_HPP