Mercurial > hg > graal-jvmci-8

annotate src/share/vm/gc_implementation/g1/heapRegionSeq.inline.hpp @ 453:c96030fff130

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
6684579: SoftReference processing can be made more efficient Summary: For current soft-ref clearing policies, we can decide at marking time if a soft-reference will definitely not be cleared, postponing the decision of whether it will definitely be cleared to the final reference processing phase. This can be especially beneficial in the case of concurrent collectors where the marking is usually concurrent but reference processing is usually not. Reviewed-by: jmasa
author ysr
date Thu, 20 Nov 2008 16:56:09 -0800
parents 37f87013dfd8
children c18cbe5936b8
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1 /*
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2 * Copyright 2001-2007 Sun Microsystems, Inc. All Rights Reserved.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
5 * This code is free software; you can redistribute it and/or modify it
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
6 * under the terms of the GNU General Public License version 2 only, as
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
7 * published by the Free Software Foundation.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
8 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
9 * This code is distributed in the hope that it will be useful, but WITHOUT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
12 * version 2 for more details (a copy is included in the LICENSE file that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
13 * accompanied this code).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
14 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
15 * You should have received a copy of the GNU General Public License version
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
16 * 2 along with this work; if not, write to the Free Software Foundation,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
18 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
20 * CA 95054 USA or visit www.sun.com if you need additional information or
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
21 * have any questions.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
22 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
23 */
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
24
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
25 inline HeapRegion* HeapRegionSeq::addr_to_region(const void* addr) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
26 assert(_seq_bottom != NULL, "bad _seq_bottom in addr_to_region");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
27 if ((char*) addr >= _seq_bottom) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
28 size_t diff = (size_t) pointer_delta((HeapWord*) addr,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
29 (HeapWord*) _seq_bottom);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
30 int index = (int) (diff >> HeapRegion::LogOfHRGrainWords);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
31 assert(index >= 0, "invariant / paranoia");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
32 if (index < _regions.length()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
33 HeapRegion* hr = _regions.at(index);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
34 assert(hr->is_in_reserved(addr),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
35 "addr_to_region is wrong...");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
36 return hr;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
37 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
38 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
39 return NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
40 }