Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/memory/Space.java @ 3972:4f93f0d00802
7059019: G1: add G1 support to the SA
Summary: Extend the SA to recognize the G1CollectedHeap and implement any code that's needed by our serviceability tools (jmap, jinfo, jstack, etc.) that depend on the SA.
Reviewed-by: never, poonam, johnc
| author | tonyp |
|---|---|
| date | Tue, 20 Sep 2011 09:59:59 -0400 |
| parents | c18cbe5936b8 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
2 * Copyright (c) 2000, 2003, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.memory; | |
| 26 | |
| 27 import java.io.*; | |
| 28 import java.util.*; | |
| 29 import sun.jvm.hotspot.debugger.*; | |
| 30 import sun.jvm.hotspot.types.*; | |
| 31 import sun.jvm.hotspot.runtime.*; | |
| 32 | |
| 33 /** <P> A Space describes a heap area. Class Space is an abstract base | |
| 34 class. </P> | |
| 35 | |
| 36 <P> Space supports allocation, size computation and GC support is | |
| 37 provided. </P> | |
| 38 | |
| 39 <P> Invariant: bottom() and end() are on page_size boundaries and: </P> | |
| 40 | |
| 41 <P> bottom() <= top() <= end() </P> | |
| 42 | |
| 43 <P> top() is inclusive and end() is exclusive. </P> */ | |
| 44 | |
| 45 public abstract class Space extends VMObject { | |
| 46 private static AddressField bottomField; | |
| 47 private static AddressField endField; | |
| 48 | |
| 49 static { | |
| 50 VM.registerVMInitializedObserver(new Observer() { | |
| 51 public void update(Observable o, Object data) { | |
| 52 initialize(VM.getVM().getTypeDataBase()); | |
| 53 } | |
| 54 }); | |
| 55 } | |
| 56 | |
| 57 private static synchronized void initialize(TypeDataBase db) { | |
| 58 Type type = db.lookupType("Space"); | |
| 59 | |
| 60 bottomField = type.getAddressField("_bottom"); | |
| 61 endField = type.getAddressField("_end"); | |
| 62 } | |
| 63 | |
| 64 public Space(Address addr) { | |
| 65 super(addr); | |
| 66 } | |
| 67 | |
| 68 public Address bottom() { return bottomField.getValue(addr); } | |
| 69 public Address end() { return endField.getValue(addr); } | |
| 70 | |
| 71 /** Returns a subregion of the space containing all the objects in | |
| 72 the space. */ | |
| 73 public MemRegion usedRegion() { | |
| 74 return new MemRegion(bottom(), end()); | |
| 75 } | |
| 76 | |
| 77 /** Support for iteration over heap -- not sure how this will | |
| 78 interact with GC in reflective system, but necessary for the | |
| 79 debugging mechanism */ | |
| 80 public OopHandle bottomAsOopHandle() { | |
| 81 return bottomField.getOopHandle(addr); | |
| 82 } | |
| 83 | |
| 84 /** Support for iteration over heap -- not sure how this will | |
| 85 interact with GC in reflective system, but necessary for the | |
| 86 debugging mechanism */ | |
| 87 public OopHandle nextOopHandle(OopHandle handle, long size) { | |
| 88 return handle.addOffsetToAsOopHandle(size); | |
| 89 } | |
| 90 | |
| 91 /** returns all MemRegions where live objects are */ | |
| 92 public abstract List/*<MemRegion>*/ getLiveRegions(); | |
| 93 | |
| 94 /** Returned value is in bytes */ | |
| 95 public long capacity() { return end().minus(bottom()); } | |
| 96 /** Returned value is in bytes */ | |
| 97 public abstract long used(); | |
| 98 /** Returned value is in bytes */ | |
| 99 public abstract long free(); | |
| 100 | |
| 101 /** Testers */ | |
| 102 public boolean contains(Address p) { | |
| 103 return (bottom().lessThanOrEqual(p) && end().greaterThan(p)); | |
| 104 } | |
| 105 | |
| 106 public void print() { printOn(System.out); } | |
| 107 public void printOn(PrintStream tty) { | |
| 108 tty.print(" space capacity = "); | |
| 109 tty.print(capacity()); | |
| 110 tty.print(", "); | |
| 111 tty.print((double) used() * 100.0/ capacity()); | |
| 112 tty.print(" used"); | |
| 113 } | |
| 114 } |