jdk8-mips64-public/hotspot: src/share/vm/oops/objArrayOop.hpp@94b6d06fd759

6860920: serialize.cpp shouldn't use objArrayOopDesc::base_offset_in_bytes(T_BYTE)
Summary: serialize.cpp currently uses objArrayOopDesc::base_offset_in_bytes(T_BYTE), which seems to be wrong.
Reviewed-by: coleenp, kvn

     1 /*

     2  * Copyright 1997-2008 Sun Microsystems, 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  *

    23  */

    25 // An objArrayOop is an array containing oops.

    26 // Evaluating "String arg[10]" will create an objArrayOop.

    28 class objArrayOopDesc : public arrayOopDesc {

    29   friend class objArrayKlass;

    30   friend class Runtime1;

    31   friend class psPromotionManager;

    32   friend class CSMarkOopClosure;

    33   friend class G1ParScanPartialArrayClosure;

    35   template <class T> T* obj_at_addr(int index) const {

    36     assert(is_within_bounds(index), "index out of bounds");

    37     return &((T*)base())[index];

    38   }

    40  public:

    41   // Returns the offset of the first element.

    42   static int base_offset_in_bytes() {

    43     return arrayOopDesc::base_offset_in_bytes(T_OBJECT);

    44   }

    46   // base is the address following the header.

    47   HeapWord* base() const      { return (HeapWord*) arrayOopDesc::base(T_OBJECT); }

    49   // Accessing

    50   oop obj_at(int index) const {

    51     // With UseCompressedOops decode the narrow oop in the objArray to an

    52     // uncompressed oop.  Otherwise this is simply a "*" operator.

    53     if (UseCompressedOops) {

    54       return load_decode_heap_oop(obj_at_addr<narrowOop>(index));

    55     } else {

    56       return load_decode_heap_oop(obj_at_addr<oop>(index));

    57     }

    58   }

    60   void obj_at_put(int index, oop value) {

    61     if (UseCompressedOops) {

    62       oop_store(obj_at_addr<narrowOop>(index), value);

    63     } else {

    64       oop_store(obj_at_addr<oop>(index), value);

    65     }

    66   }

    67   // Sizing

    68   static int header_size()    { return arrayOopDesc::header_size(T_OBJECT); }

    69   int object_size()           { return object_size(length()); }

    70   int array_size()            { return array_size(length()); }

    72   static int object_size(int length) {

    73     // This returns the object size in HeapWords.

    74     return align_object_size(header_size() + array_size(length));

    75   }

    77   // Give size of objArrayOop in HeapWords minus the header

    78   static int array_size(int length) {

    79     // Without UseCompressedOops, this is simply:

    80     // oop->length() * HeapWordsPerOop;

    81     // With narrowOops, HeapWordsPerOop is 1/2 or equal 0 as an integer.

    82     // The oop elements are aligned up to wordSize

    83     const int HeapWordsPerOop = heapOopSize/HeapWordSize;

    84     if (HeapWordsPerOop > 0) {

    85       return length * HeapWordsPerOop;

    86     } else {

    87       const int OopsPerHeapWord = HeapWordSize/heapOopSize;

    88       int word_len = align_size_up(length, OopsPerHeapWord)/OopsPerHeapWord;

    89       return word_len;

    90     }

    91   }

    93   // special iterators for index ranges, returns size of object

    94 #define ObjArrayOop_OOP_ITERATE_DECL(OopClosureType, nv_suffix)     \

    95   int oop_iterate_range(OopClosureType* blk, int start, int end);

    97   ALL_OOP_OOP_ITERATE_CLOSURES_1(ObjArrayOop_OOP_ITERATE_DECL)

    98   ALL_OOP_OOP_ITERATE_CLOSURES_2(ObjArrayOop_OOP_ITERATE_DECL)

    99 };

Mercurial > jdk8-mips64-public > hotspot / file revision

src/share/vm/oops/objArrayOop.hpp@94b6d06fd759

src/share/vm/oops/objArrayOop.hpp