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.server;
042:
043: /**
044: * This class contains instrumentation methods for object allocation profiling.
045: *
046: * @author Misha Dmitriev
047: */
048: public class ProfilerRuntimeObjAlloc extends ProfilerRuntimeMemory {
049: //~ Static fields/initializers -----------------------------------------------------------------------------------------------
050:
051: protected static boolean objAllocProfilingDisabled = true;
052:
053: //~ Methods ------------------------------------------------------------------------------------------------------------------
054:
055: public static void enableProfiling(boolean v) {
056: if (!v) {
057: objAllocProfilingDisabled = true;
058: }
059:
060: if (v) {
061: createNewDataStructures();
062: ProfilerRuntimeMemory.enableProfiling(v);
063: } else {
064: ProfilerRuntimeMemory.enableProfiling(v);
065:
066: // Give the threads that are currently executing instrumentation enough time to finish
067: // before we nullify the data structures that are used in instrumentation code.
068: try {
069: Thread.sleep(100);
070: } catch (Exception ex) {
071: }
072:
073: clearDataStructures();
074: }
075:
076: if (v) {
077: objAllocProfilingDisabled = false;
078: }
079: }
080:
081: public static void traceObjAlloc(Object object, char classId) {
082: if (objAllocProfilingDisabled) {
083: return;
084: }
085:
086: if (ThreadInfo.profilingSuspended()
087: || ThreadInfo.isCurrentThreadProfilerServerThread()) {
088: // Avoid counting objects allocated by our own agent threads, or by this method's callees
089: return;
090: }
091:
092: ThreadInfo ti = ThreadInfo.getThreadInfo();
093:
094: if (ti.inProfilingRuntimeMethod > 0) {
095: return;
096: }
097:
098: if (!ti.isInitialized()) {
099: ti.initialize(true);
100: }
101:
102: ti.inProfilingRuntimeMethod++;
103:
104: // See comment marked with (***) in ProfilerRuntimeCPUFullInstr
105: classId = (char) ((int) classId);
106:
107: synchronized (allocatedInstancesCount) {
108: allocatedInstancesCount[classId]++;
109: }
110:
111: if (allocatedInstThreshold[classId] <= 0) {
112: long objSize = getCachedObjectSize(classId, object);
113: getAndSendCurrentStackTrace(classId, objSize);
114: allocatedInstThreshold[classId] = nextRandomizedInterval();
115: }
116:
117: allocatedInstThreshold[classId]--;
118: ti.inProfilingRuntimeMethod--;
119: }
120:
121: protected static void clearDataStructures() {
122: ProfilerRuntimeMemory.clearDataStructures();
123: }
124:
125: protected static void createNewDataStructures() {
126: ProfilerRuntimeMemory.createNewDataStructures();
127: }
128: }
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