001: /*
002: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003: *
004: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
005: *
006: * The contents of this file are subject to the terms of either the GNU
007: * General Public License Version 2 only ("GPL") or the Common
008: * Development and Distribution License("CDDL") (collectively, the
009: * "License"). You may not use this file except in compliance with the
010: * License. You can obtain a copy of the License at
011: * http://www.netbeans.org/cddl-gplv2.html
012: * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
013: * specific language governing permissions and limitations under the
014: * License. When distributing the software, include this License Header
015: * Notice in each file and include the License file at
016: * nbbuild/licenses/CDDL-GPL-2-CP. Sun designates this
017: * particular file as subject to the "Classpath" exception as provided
018: * by Sun in the GPL Version 2 section of the License file that
019: * accompanied this code. If applicable, add the following below the
020: * License Header, with the fields enclosed by brackets [] replaced by
021: * your own identifying information:
022: * "Portions Copyrighted [year] [name of copyright owner]"
023: *
024: * Contributor(s):
025: * The Original Software is NetBeans. The Initial Developer of the Original
026: * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
027: * Microsystems, Inc. All Rights Reserved.
028: *
029: * If you wish your version of this file to be governed by only the CDDL
030: * or only the GPL Version 2, indicate your decision by adding
031: * "[Contributor] elects to include this software in this distribution
032: * under the [CDDL or GPL Version 2] license." If you do not indicate a
033: * single choice of license, a recipient has the option to distribute
034: * your version of this file under either the CDDL, the GPL Version 2 or
035: * to extend the choice of license to its licensees as provided above.
036: * However, if you add GPL Version 2 code and therefore, elected the GPL
037: * Version 2 license, then the option applies only if the new code is
038: * made subject to such option by the copyright holder.
039: */
040:
041: package org.netbeans.lib.profiler.heap;
042:
043: import java.util.Map;
044:
045: /**
046: *
047: * @author Tomas Hurka
048: * @author Toms Hurka
049: */
050: class LoadClassSegment extends TagBounds {
051: //~ Instance fields ----------------------------------------------------------------------------------------------------------
052:
053: HprofHeap hprofHeap;
054: final int classIDOffset;
055: final int classSerialNumberOffset;
056: final int lengthOffset;
057: final int nameStringIDOffset;
058: final int stackTraceSerialOffset;
059: final int timeOffset;
060:
061: //~ Constructors -------------------------------------------------------------------------------------------------------------
062:
063: LoadClassSegment(HprofHeap heap, long start, long end) {
064: super (HprofHeap.LOAD_CLASS, start, end);
065:
066: int idSize = heap.dumpBuffer.getIDSize();
067: hprofHeap = heap;
068: timeOffset = 1;
069: lengthOffset = timeOffset + 4;
070: classSerialNumberOffset = lengthOffset + 4;
071: classIDOffset = classSerialNumberOffset + 4;
072: stackTraceSerialOffset = classIDOffset + idSize;
073: nameStringIDOffset = stackTraceSerialOffset + 4;
074: }
075:
076: //~ Methods ------------------------------------------------------------------------------------------------------------------
077:
078: LoadClass getClassByID(long classObjectID) {
079: long[] offset = new long[] { startOffset };
080:
081: while (offset[0] < endOffset) {
082: long start = offset[0];
083: long classID = readLoadClassTag(offset);
084:
085: if (classID == classObjectID) {
086: return new LoadClass(this , start);
087: }
088: }
089:
090: return null;
091: }
092:
093: void setLoadClassOffsets() {
094: ClassDumpSegment classDumpSegment = hprofHeap
095: .getClassDumpSegment();
096: long[] offset = new long[] { startOffset };
097:
098: while (offset[0] < endOffset) {
099: long start = offset[0];
100: long classID = readLoadClassTag(offset);
101: ClassDump classDump = classDumpSegment
102: .getClassDumpByID(classID);
103:
104: if (classDump != null) {
105: classDump.setClassLoadOffset(start);
106: }
107: }
108: }
109:
110: private HprofByteBuffer getDumpBuffer() {
111: HprofByteBuffer dumpBuffer = hprofHeap.dumpBuffer;
112:
113: return dumpBuffer;
114: }
115:
116: private long readLoadClassTag(long[] offset) {
117: long start = offset[0];
118:
119: if (hprofHeap.readTag(offset) != HprofHeap.LOAD_CLASS) {
120: return 0;
121: }
122:
123: return getDumpBuffer().getID(start + classIDOffset);
124: }
125: }
|