jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/shared/liveRange.hpp@ba764ed4b6f2

6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
Summary: Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv
Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold

     1 /*

     2  * Copyright 2001-2003 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 // This is a shared helper class used during phase 3 and 4 to move all the objects

    26 // Dead regions in a Space are linked together to keep track of the live regions

    27 // so that the live data can be traversed quickly without having to look at each

    28 // object.

    30 class LiveRange: public MemRegion {

    31 public:

    32   LiveRange(HeapWord* bottom, HeapWord* top): MemRegion(bottom, top) {}

    34   void set_end(HeapWord* e) {

    35     assert(e >= start(), "should be a non-zero range");

    36     MemRegion::set_end(e);

    37   }

    38   void set_word_size(size_t ws) {

    39     assert(ws >= 0, "should be a non-zero range");

    40     MemRegion::set_word_size(ws);

    41   }

    43   LiveRange * next() { return (LiveRange *) end(); }

    45   void move_to(HeapWord* destination) {

    46     Copy::aligned_conjoint_words(start(), destination, word_size());

    47   }

    48 };

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

src/share/vm/gc_implementation/shared/liveRange.hpp@ba764ed4b6f2

src/share/vm/gc_implementation/shared/liveRange.hpp