| /* |
| * Copyright (c) 2002, 2009, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| package sun.jvm.hotspot.jdi; |
| |
| import sun.jvm.hotspot.debugger.OopHandle; |
| import sun.jvm.hotspot.runtime.VMObject; |
| import sun.jvm.hotspot.runtime.JavaThread; |
| import sun.jvm.hotspot.runtime.OSThread; |
| //import sun.jvm.hotspot.runtime.StackFrameStream; |
| import sun.jvm.hotspot.runtime.JavaVFrame; |
| import sun.jvm.hotspot.runtime.JavaThreadState; |
| import sun.jvm.hotspot.runtime.MonitorInfo; |
| import sun.jvm.hotspot.runtime.ObjectMonitor; |
| import sun.jvm.hotspot.oops.Oop; |
| import sun.jvm.hotspot.oops.ObjectHeap; |
| import sun.jvm.hotspot.oops.Instance; |
| import sun.jvm.hotspot.oops.OopUtilities; |
| import sun.jvm.hotspot.oops.Klass; |
| import sun.jvm.hotspot.utilities.Assert; |
| import com.sun.jdi.*; |
| import java.util.*; |
| |
| public class ThreadReferenceImpl extends ObjectReferenceImpl |
| implements ThreadReference, /* imports */ JVMTIThreadState { |
| |
| private JavaThread myJavaThread; |
| private ArrayList frames; // StackFrames |
| private List ownedMonitors; // List<ObjectReferenceImpl> |
| private List ownedMonitorsInfo; // List<MonitorInfo> |
| private ObjectReferenceImpl currentContendingMonitor; |
| |
| ThreadReferenceImpl(VirtualMachine aVm, sun.jvm.hotspot.runtime.JavaThread aRef) { |
| // We are given a JavaThread and save it in our myJavaThread field. |
| // But, our parent class is an ObjectReferenceImpl so we need an Oop |
| // for it. JavaThread is a wrapper around a Thread Oop so we get |
| // that Oop and give it to our super. |
| // We can get it back again by calling ref(). |
| super(aVm, (Instance)aRef.getThreadObj()); |
| myJavaThread = aRef; |
| } |
| |
| ThreadReferenceImpl(VirtualMachine vm, Instance oRef) { |
| // Instance must be of type java.lang.Thread |
| super(vm, oRef); |
| |
| // 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. |
| myJavaThread = OopUtilities.threadOopGetJavaThread(oRef); |
| } |
| |
| // return value may be null. refer to the comment in constructor. |
| JavaThread getJavaThread() { |
| return myJavaThread; |
| } |
| |
| protected String description() { |
| return "ThreadReference " + uniqueID(); |
| } |
| |
| /** |
| * Note that we only cache the name string while suspended because |
| * it can change via Thread.setName arbitrarily |
| */ |
| public String name() { |
| return OopUtilities.threadOopGetName(ref()); |
| } |
| |
| public void suspend() { |
| vm.throwNotReadOnlyException("ThreadReference.suspend()"); |
| } |
| |
| public void resume() { |
| vm.throwNotReadOnlyException("ThreadReference.resume()"); |
| } |
| |
| public int suspendCount() { |
| // all threads are "suspended" when we attach to process or core. |
| // we interpret this as one suspend. |
| return 1; |
| } |
| |
| public void stop(ObjectReference throwable) throws InvalidTypeException { |
| vm.throwNotReadOnlyException("ThreadReference.stop()"); |
| } |
| |
| public void interrupt() { |
| vm.throwNotReadOnlyException("ThreadReference.interrupt()"); |
| } |
| |
| // refer to jvmtiEnv::GetThreadState |
| private int jvmtiGetThreadState() { |
| // get most state bits |
| int state = OopUtilities.threadOopGetThreadStatus(ref()); |
| // add more state bits |
| if (myJavaThread != null) { |
| JavaThreadState jts = myJavaThread.getThreadState(); |
| if (myJavaThread.isBeingExtSuspended()) { |
| state |= JVMTI_THREAD_STATE_SUSPENDED; |
| } |
| if (jts == JavaThreadState.IN_NATIVE) { |
| state |= JVMTI_THREAD_STATE_IN_NATIVE; |
| } |
| OSThread osThread = myJavaThread.getOSThread(); |
| if (osThread != null && osThread.interrupted()) { |
| state |= JVMTI_THREAD_STATE_INTERRUPTED; |
| } |
| } |
| return state; |
| } |
| |
| public int status() { |
| int state = jvmtiGetThreadState(); |
| int status = THREAD_STATUS_UNKNOWN; |
| // refer to map2jdwpThreadStatus in util.c (back-end) |
| if (! ((state & JVMTI_THREAD_STATE_ALIVE) != 0) ) { |
| if ((state & JVMTI_THREAD_STATE_TERMINATED) != 0) { |
| status = THREAD_STATUS_ZOMBIE; |
| } else { |
| status = THREAD_STATUS_NOT_STARTED; |
| } |
| } else { |
| if ((state & JVMTI_THREAD_STATE_SLEEPING) != 0) { |
| status = THREAD_STATUS_SLEEPING; |
| } else if ((state & JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER) != 0) { |
| status = THREAD_STATUS_MONITOR; |
| } else if ((state & JVMTI_THREAD_STATE_WAITING) != 0) { |
| status = THREAD_STATUS_WAIT; |
| } else if ((state & JVMTI_THREAD_STATE_RUNNABLE) != 0) { |
| status = THREAD_STATUS_RUNNING; |
| } |
| } |
| return status; |
| } |
| |
| public boolean isSuspended() { //fixme jjh |
| // If we want to support doing this for a VM which was being |
| // debugged, then we need to fix this. |
| // In the meantime, we will say all threads are suspended, |
| // otherwise, some things won't work, like the jdb 'up' cmd. |
| return true; |
| } |
| |
| public boolean isAtBreakpoint() { //fixme jjh |
| // If we want to support doing this for a VM which was being |
| // debugged, then we need to fix this. |
| return false; |
| } |
| |
| public ThreadGroupReference threadGroup() { |
| return (ThreadGroupReferenceImpl)vm.threadGroupMirror( |
| (Instance)OopUtilities.threadOopGetThreadGroup(ref())); |
| } |
| |
| public int frameCount() throws IncompatibleThreadStateException { //fixme jjh |
| privateFrames(0, -1); |
| return frames.size(); |
| } |
| |
| public List frames() throws IncompatibleThreadStateException { |
| return privateFrames(0, -1); |
| } |
| |
| public StackFrame frame(int index) throws IncompatibleThreadStateException { |
| List list = privateFrames(index, 1); |
| return (StackFrame)list.get(0); |
| } |
| |
| public List frames(int start, int length) |
| throws IncompatibleThreadStateException { |
| if (length < 0) { |
| throw new IndexOutOfBoundsException( |
| "length must be greater than or equal to zero"); |
| } |
| return privateFrames(start, length); |
| } |
| |
| /** |
| * Private version of frames() allows "-1" to specify all |
| * remaining frames. |
| */ |
| |
| private List privateFrames(int start, int length) |
| throws IncompatibleThreadStateException { |
| if (myJavaThread == null) { |
| // for zombies and yet-to-be-started threads we need to throw exception |
| throw new IncompatibleThreadStateException(); |
| } |
| if (frames == null) { |
| frames = new ArrayList(10); |
| JavaVFrame myvf = myJavaThread.getLastJavaVFrameDbg(); |
| while (myvf != null) { |
| StackFrame myFrame = new StackFrameImpl(vm, this, myvf); |
| //fixme jjh null should be a Location |
| frames.add(myFrame); |
| myvf = (JavaVFrame)myvf.javaSender(); |
| } |
| } |
| |
| List retVal; |
| if (frames.size() == 0) { |
| retVal = new ArrayList(0); |
| } else { |
| int toIndex = start + length; |
| if (length == -1) { |
| toIndex = frames.size(); |
| } |
| retVal = frames.subList(start, toIndex); |
| } |
| return Collections.unmodifiableList(retVal); |
| } |
| |
| // refer to JvmtiEnvBase::get_owned_monitors |
| public List ownedMonitors() throws IncompatibleThreadStateException { |
| if (vm.canGetOwnedMonitorInfo() == false) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| if (myJavaThread == null) { |
| throw new IncompatibleThreadStateException(); |
| } |
| |
| if (ownedMonitors != null) { |
| return ownedMonitors; |
| } |
| |
| ownedMonitorsWithStackDepth(); |
| |
| for (Iterator omi = ownedMonitorsInfo.iterator(); omi.hasNext(); ) { |
| //FIXME : Change the MonitorInfoImpl cast to com.sun.jdi.MonitorInfo |
| // when hotspot start building with jdk1.6. |
| ownedMonitors.add(((MonitorInfoImpl)omi.next()).monitor()); |
| } |
| |
| return ownedMonitors; |
| } |
| |
| // new method since 1.6. |
| // Real body will be supplied later. |
| public List ownedMonitorsAndFrames() throws IncompatibleThreadStateException { |
| if (!vm.canGetMonitorFrameInfo()) { |
| throw new UnsupportedOperationException( |
| "target does not support getting Monitor Frame Info"); |
| } |
| |
| if (myJavaThread == null) { |
| throw new IncompatibleThreadStateException(); |
| } |
| |
| if (ownedMonitorsInfo != null) { |
| return ownedMonitorsInfo; |
| } |
| |
| ownedMonitorsWithStackDepth(); |
| return ownedMonitorsInfo; |
| } |
| |
| private void ownedMonitorsWithStackDepth() { |
| |
| ownedMonitorsInfo = new ArrayList(); |
| List lockedObjects = new ArrayList(); // List<OopHandle> |
| List stackDepth = new ArrayList(); // List<int> |
| ObjectMonitor waitingMonitor = myJavaThread.getCurrentWaitingMonitor(); |
| ObjectMonitor pendingMonitor = myJavaThread.getCurrentPendingMonitor(); |
| OopHandle waitingObj = null; |
| if (waitingMonitor != null) { |
| // save object of current wait() call (if any) for later comparison |
| waitingObj = waitingMonitor.object(); |
| } |
| OopHandle pendingObj = null; |
| if (pendingMonitor != null) { |
| // save object of current enter() call (if any) for later comparison |
| pendingObj = pendingMonitor.object(); |
| } |
| |
| JavaVFrame frame = myJavaThread.getLastJavaVFrameDbg(); |
| int depth=0; |
| while (frame != null) { |
| List frameMonitors = frame.getMonitors(); // List<MonitorInfo> |
| for (Iterator miItr = frameMonitors.iterator(); miItr.hasNext(); ) { |
| sun.jvm.hotspot.runtime.MonitorInfo mi = (sun.jvm.hotspot.runtime.MonitorInfo) miItr.next(); |
| if (mi.eliminated() && frame.isCompiledFrame()) { |
| continue; // skip eliminated monitor |
| } |
| 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); |
| stackDepth.add(new Integer(depth)); |
| } |
| frame = (JavaVFrame) frame.javaSender(); |
| depth++; |
| } |
| |
| // now convert List<OopHandle> to List<ObjectReference> |
| ObjectHeap heap = vm.saObjectHeap(); |
| Iterator stk = stackDepth.iterator(); |
| for (Iterator loItr = lockedObjects.iterator(); loItr.hasNext(); ) { |
| Oop obj = heap.newOop((OopHandle)loItr.next()); |
| ownedMonitorsInfo.add(new MonitorInfoImpl(vm, vm.objectMirror(obj), this, |
| ((Integer)stk.next()).intValue())); |
| } |
| } |
| |
| // refer to JvmtiEnvBase::get_current_contended_monitor |
| public ObjectReference currentContendedMonitor() |
| throws IncompatibleThreadStateException { |
| if (vm.canGetCurrentContendedMonitor() == false) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| if (myJavaThread == null) { |
| throw new IncompatibleThreadStateException(); |
| } |
| ObjectMonitor mon = myJavaThread.getCurrentWaitingMonitor(); |
| if (mon == null) { |
| // thread is not doing an Object.wait() call |
| mon = myJavaThread.getCurrentPendingMonitor(); |
| if (mon != null) { |
| OopHandle handle = mon.object(); |
| // If obj == NULL, then ObjectMonitor is raw which doesn't count |
| // as contended for this API |
| return vm.objectMirror(vm.saObjectHeap().newOop(handle)); |
| } else { |
| // no contended ObjectMonitor |
| return null; |
| } |
| } else { |
| // thread is doing an Object.wait() call |
| OopHandle handle = mon.object(); |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(handle != null, "Object.wait() should have an object"); |
| } |
| Oop obj = vm.saObjectHeap().newOop(handle); |
| return vm.objectMirror(obj); |
| } |
| } |
| |
| |
| public void popFrames(StackFrame frame) throws IncompatibleThreadStateException { |
| vm.throwNotReadOnlyException("ThreadReference.popFrames()"); |
| } |
| |
| public void forceEarlyReturn(Value returnValue) throws IncompatibleThreadStateException { |
| vm.throwNotReadOnlyException("ThreadReference.forceEarlyReturn()"); |
| } |
| |
| public String toString() { |
| return "instance of " + referenceType().name() + |
| "(name='" + name() + "', " + "id=" + uniqueID() + ")"; |
| } |
| } |
