Mercurial > hg > graal-compiler
diff agent/src/share/classes/sun/jvm/hotspot/utilities/soql/JSJavaThread.java @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | b109e761e927 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/src/share/classes/sun/jvm/hotspot/utilities/soql/JSJavaThread.java Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,186 @@ +/* + * Copyright 2004-2007 Sun Microsystems, Inc. All Rights Reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +package sun.jvm.hotspot.utilities.soql; + +import java.util.*; +import sun.jvm.hotspot.debugger.*; +import sun.jvm.hotspot.oops.*; +import sun.jvm.hotspot.runtime.*; + +/** + * Wraps a JavaThread instance in the target VM. + */ +public class JSJavaThread extends JSJavaInstance { + public JSJavaThread(Instance threadOop, JSJavaFactory fac) { + super(threadOop, fac); + // JavaThread retrieved from java.lang.Thread instance may be null. + // This is the case for threads not-started and for zombies. Wherever + // appropriate, check for null instead of resulting in NullPointerException. + this.jthread = OopUtilities.threadOopGetJavaThread(threadOop); + } + + public JSJavaThread(JavaThread jt, JSJavaFactory fac) { + super((Instance) jt.getThreadObj(), fac); + this.jthread = jt; + } + + public String toString() { + String name = getName(); + StringBuffer buf = new StringBuffer(); + buf.append("Thread (address="); + buf.append(getOop().getHandle()); + buf.append(", name="); + if (name != null) { + buf.append(name); + } else { + buf.append("<unnamed>"); + } + buf.append(')'); + return buf.toString(); + } + + protected Object getFieldValue(String name) { + if (name.equals("name")) { + return getName(); + } else if (name.equals("frames")) { + return getFrames(); + } else if (name.equals("monitors")) { + return getOwnedMonitors(); + } else { + return super.getFieldValue(name); + } + } + + protected String[] getFieldNames() { + String[] flds = super.getFieldNames(); + String[] res = new String[flds.length + 2]; + System.arraycopy(flds, 0, res, 0, flds.length); + res[flds.length] = "frames"; + res[flds.length + 1] = "monitors"; + return res; + } + + protected boolean hasField(String name) { + if (name.equals("frames") || name.equals("monitors")) { + return true; + } else { + return super.hasField(name); + } + } + + //-- Internals only below this point + private String getName() { + return OopUtilities.threadOopGetName(getOop()); + } + + private synchronized JSList getFrames() { + if (framesCache == null) { + final List list = new ArrayList(0); + if (jthread != null) { + JavaVFrame jvf = jthread.getLastJavaVFrameDbg(); + while (jvf != null) { + list.add(jvf); + jvf = jvf.javaSender(); + } + } + framesCache = factory.newJSList(list); + } + return framesCache; + } + + private synchronized JSList getOwnedMonitors() { + if (monitorsCache == null) { + final List ownedMonitors = new ArrayList(0); + if (jthread != null) { + List lockedObjects = new ArrayList(); // List<OopHandle> + + ObjectMonitor waitingMonitor = jthread.getCurrentWaitingMonitor(); + OopHandle waitingObj = null; + if (waitingMonitor != null) { + // save object of current wait() call (if any) for later comparison + waitingObj = waitingMonitor.object(); + } + + ObjectMonitor pendingMonitor = jthread.getCurrentPendingMonitor(); + OopHandle pendingObj = null; + if (pendingMonitor != null) { + // save object of current enter() call (if any) for later comparison + pendingObj = pendingMonitor.object(); + } + + JavaVFrame frame = jthread.getLastJavaVFrameDbg(); + while (frame != null) { + List frameMonitors = frame.getMonitors(); // List<MonitorInfo> + for (Iterator miItr = frameMonitors.iterator(); miItr.hasNext(); ) { + MonitorInfo mi = (MonitorInfo) miItr.next(); + OopHandle obj = mi.owner(); + if (obj == null) { + // this monitor doesn't have an owning object so skip it + continue; + } + + if (obj.equals(waitingObj)) { + // the thread is waiting on this monitor so it isn't really owned + continue; + } + + if (obj.equals(pendingObj)) { + // the thread is pending on this monitor so it isn't really owned + continue; + } + + boolean found = false; + for (Iterator loItr = lockedObjects.iterator(); loItr.hasNext(); ) { + // check for recursive locks + if (obj.equals(loItr.next())) { + found = true; + break; + } + } + if (found) { + // already have this object so don't include it + continue; + } + // add the owning object to our list + lockedObjects.add(obj); + } + frame = (JavaVFrame) frame.javaSender(); + } + + // now convert List<OopHandle> to List<Oop> + ObjectHeap heap = VM.getVM().getObjectHeap(); + for (Iterator loItr = lockedObjects.iterator(); loItr.hasNext(); ) { + ownedMonitors.add(heap.newOop((OopHandle)loItr.next())); + } + } + monitorsCache = factory.newJSList(ownedMonitors); + } + return monitorsCache; + } + + private JavaThread jthread; + private JSList framesCache; + private JSList monitorsCache; +}