author | stefank |
Thu, 22 Feb 2018 18:37:23 +0100 | |
changeset 49049 | effb50eeea4e |
parent 47216 | 71c04702a3d5 |
child 49628 | 88478047bc8f |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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package sun.jvm.hotspot.gc.shared; |
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import java.io.*; |
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import java.util.*; |
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import sun.jvm.hotspot.debugger.*; |
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import sun.jvm.hotspot.runtime.*; |
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import sun.jvm.hotspot.types.*; |
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import sun.jvm.hotspot.utilities.*; |
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public class GenCollectedHeap extends CollectedHeap { |
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private static AddressField youngGenField; |
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private static AddressField oldGenField; |
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private static AddressField youngGenSpecField; |
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private static AddressField oldGenSpecField; |
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private static GenerationFactory genFactory; |
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static { |
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VM.registerVMInitializedObserver(new Observer() { |
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public void update(Observable o, Object data) { |
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initialize(VM.getVM().getTypeDataBase()); |
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} |
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}); |
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} |
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private static synchronized void initialize(TypeDataBase db) { |
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Type type = db.lookupType("GenCollectedHeap"); |
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youngGenField = type.getAddressField("_young_gen"); |
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oldGenField = type.getAddressField("_old_gen"); |
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youngGenSpecField = type.getAddressField("_young_gen_spec"); |
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oldGenSpecField = type.getAddressField("_old_gen_spec"); |
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genFactory = new GenerationFactory(); |
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} |
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public GenCollectedHeap(Address addr) { |
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super(addr); |
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} |
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public int nGens() { |
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return 2; // Young + Old |
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} |
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public Generation getGen(int i) { |
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if (Assert.ASSERTS_ENABLED) { |
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Assert.that((i == 0) || (i == 1), "Index " + i + |
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" out of range (should be 0 or 1)"); |
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} |
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switch (i) { |
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case 0: |
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return genFactory.newObject(youngGenField.getValue(addr)); |
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case 1: |
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return genFactory.newObject(oldGenField.getValue(addr)); |
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default: |
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// no generation for i, and assertions disabled. |
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return null; |
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} |
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} |
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public boolean isIn(Address a) { |
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for (int i = 0; i < nGens(); i++) { |
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Generation gen = getGen(i); |
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if (gen.isIn(a)) { |
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return true; |
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} |
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} |
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return false; |
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} |
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public long capacity() { |
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long capacity = 0; |
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for (int i = 0; i < nGens(); i++) { |
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capacity += getGen(i).capacity(); |
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} |
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return capacity; |
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} |
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public long used() { |
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long used = 0; |
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for (int i = 0; i < nGens(); i++) { |
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used += getGen(i).used(); |
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} |
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return used; |
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} |
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/** Package-private access to GenerationSpecs */ |
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GenerationSpec spec(int level) { |
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if (Assert.ASSERTS_ENABLED) { |
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Assert.that((level == 0) || (level == 1), "Index " + level + |
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" out of range (should be 0 or 1)"); |
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} |
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if ((level != 0) && (level != 1)) { |
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return null; |
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} |
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if (level == 0) { |
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return (GenerationSpec) |
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VMObjectFactory.newObject(GenerationSpec.class, |
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youngGenSpecField.getAddress()); |
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} else { |
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return (GenerationSpec) |
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VMObjectFactory.newObject(GenerationSpec.class, |
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oldGenSpecField.getAddress()); |
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} |
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} |
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public CollectedHeapName kind() { |
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return CollectedHeapName.GEN_COLLECTED_HEAP; |
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} |
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public void printOn(PrintStream tty) { |
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for (int i = 0; i < nGens(); i++) { |
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tty.print("Gen " + i + ": "); |
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getGen(i).printOn(tty); |
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tty.println("Invocations: " + getGen(i).invocations()); |
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tty.println(); |
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} |
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} |
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} |