Mercurial > hg > graal-jvmci-8
comparison agent/src/share/classes/sun/jvm/hotspot/runtime/ThreadLocalAllocBuffer.java @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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-1:000000000000 | 0:a61af66fc99e |
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1 /* | |
2 * Copyright 2000-2006 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 */ | |
24 | |
25 package sun.jvm.hotspot.runtime; | |
26 | |
27 import java.io.*; | |
28 import java.util.*; | |
29 import sun.jvm.hotspot.debugger.*; | |
30 import sun.jvm.hotspot.types.*; | |
31 | |
32 /** <P> ThreadLocalAllocBuffer: a descriptor for thread-local storage | |
33 used by the threads for allocation. </P> | |
34 | |
35 <P> It is thread-private at any time, but maybe multiplexed over | |
36 time across multiple threads. </P> */ | |
37 | |
38 public class ThreadLocalAllocBuffer extends VMObject { | |
39 private static AddressField startField; | |
40 private static AddressField topField; | |
41 private static AddressField endField; | |
42 private static CIntegerField desired_sizeField; | |
43 | |
44 static { | |
45 VM.registerVMInitializedObserver(new Observer() { | |
46 public void update(Observable o, Object data) { | |
47 initialize(VM.getVM().getTypeDataBase()); | |
48 } | |
49 }); | |
50 } | |
51 | |
52 private static synchronized void initialize(TypeDataBase db) { | |
53 Type type = db.lookupType("ThreadLocalAllocBuffer"); | |
54 | |
55 startField = type.getAddressField("_start"); | |
56 topField = type.getAddressField("_top"); | |
57 endField = type.getAddressField("_end"); | |
58 desired_sizeField = type.getCIntegerField("_desired_size"); | |
59 } | |
60 | |
61 public ThreadLocalAllocBuffer(Address addr) { | |
62 super(addr); | |
63 } | |
64 | |
65 public Address start() { return startField.getValue(addr); } | |
66 public Address end() { return endField.getValue(addr); } | |
67 public Address top() { return topField.getValue(addr); } | |
68 | |
69 /** Support for iteration over heap -- not sure how this will | |
70 interact with GC in reflective system, but necessary for the | |
71 debugging mechanism */ | |
72 public OopHandle startAsOopHandle() { | |
73 return startField.getOopHandle(addr); | |
74 } | |
75 | |
76 /** Support for iteration over heap -- not sure how this will | |
77 interact with GC in reflective system, but necessary for the | |
78 debugging mechanism */ | |
79 public OopHandle nextOopHandle(OopHandle handle, long size) { | |
80 return handle.addOffsetToAsOopHandle(size); | |
81 } | |
82 | |
83 // public int size(); // FIXME: must adjust this to be in bytes | |
84 // public int availableSize(); // FIXME: must adjust this to be in bytes | |
85 public void print() { | |
86 printOn(System.out); | |
87 } | |
88 | |
89 public boolean contains(Address p) { | |
90 if (top() == null) { | |
91 return false; | |
92 } | |
93 return (start().lessThanOrEqual(p) && top().greaterThan(p)); | |
94 } | |
95 | |
96 public void printOn(PrintStream tty) { | |
97 tty.println(" [" + start() + "," + | |
98 top() + "," + end() + ")"); | |
99 } | |
100 } |