Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/utilities/ReversePtrs.java @ 6641:a9fed06c01d2
7154641: Servicability agent should work on platforms other than x86, sparc
Summary: Added capability to load support classes for other cpus
Reviewed-by: coleenp, bobv, sla
Contributed-by: Bill Pittore <bill.pittore@oracle.com>
author | bpittore |
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date | Thu, 30 Aug 2012 11:20:01 -0400 |
parents | c18cbe5936b8 |
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0 | 1 /* |
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2 * Copyright (c) 2002, 2006, Oracle and/or its affiliates. All rights reserved. |
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12 * version 2 for more details (a copy is included in the LICENSE file that | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 package sun.jvm.hotspot.utilities; | |
26 | |
27 import java.util.*; | |
28 import sun.jvm.hotspot.oops.*; | |
29 | |
30 /** ReversePtrs hashtable. */ | |
31 | |
32 public class ReversePtrs { | |
33 private HashMap rp; | |
34 | |
35 public ReversePtrs() { | |
36 rp = new HashMap(); | |
37 } | |
38 | |
39 public void put(LivenessPathElement from, Oop to) { | |
40 if (to == null) return; | |
41 ArrayList al = (ArrayList) rp.get((Object) to); | |
42 if (al == null) al = new ArrayList(); | |
43 // Inserting at the beginning is a hack to change the reported | |
44 // paths from LivenessAnalysis to look more like they used to; | |
45 // otherwise paths through the Finalizer queue to popular objects | |
46 // seem to be preferred | |
47 al.add(0, (Object) from); | |
48 rp.put((Object) to, (Object) al); | |
49 } | |
50 | |
51 /** Returns an ArrayList of the incoming references to this Oop if | |
52 it is alive, and null if it is dead according to the | |
53 ReversePtrsAnalysis. Currently not all roots are scanned so this | |
54 result is frequently inaccurate for JVM-internal objects, but is | |
55 usually correct for Java-level objects. */ | |
56 public ArrayList/*<LivenessPathElement>*/ get(Oop obj) { | |
57 return (ArrayList) rp.get((Object)obj); | |
58 } | |
59 } |