Examples of sun.jvm.hotspot.debugger.OopHandle

sun.jvm.hotspot.debugger.OopHandle

This is a tag interface (similar to Cloneable) which indicates that the contained address is "special" and is updated under the hood by the VM. The purpose is to support implementation of reflection on the current VM with these interfaces; if the Java code implementing parts of the VM requires proxies for objects in the heap, it must be the case that those proxies are updated if GC occurs. This is the level at which this updating is handled. The VM (and specifically the GC code) must have intimate knowledge of the VM-specific implementation of this interface.

Note that in the case of debugging a remote VM, it is not workable to handle the automatic updating of these handles. If the debugger allows the VM to resume running, it will have to look up once again any object references via the path they were found (i.e., the activation on the stack as the root, etc.)

            }
            // 'this' at index 0.
            if (values.get(0).getType() == BasicType.getTConflict()) {
              return null;
            }
            OopHandle handle = values.oopHandleAt(0);
            ObjectHeap heap = vm.saObjectHeap();
            thisObject = vm.objectMirror(heap.newOop(handle));
        }
        return thisObject;
    }

View Full Code Here

    }


    private ValueImpl getSlotValue(StackValueCollection values,
                       BasicType variableType, int ss) {
        ValueImpl valueImpl = null;
        OopHandle handle = null;
        ObjectHeap heap = vm.saObjectHeap();
        if (values.get(ss).getType() == BasicType.getTConflict()) {
          // Dead locals, so just represent them as a zero of the appropriate type
          if (variableType == BasicType.T_BOOLEAN) {
            valueImpl = (BooleanValueImpl) vm.mirrorOf(false);

View Full Code Here

    private int countLockedObjects(JavaThread jt, Oop obj) {
        int res = 0;
        JavaVFrame frame = jt.getLastJavaVFrameDbg();
        while (frame != null) {
            List monitors = frame.getMonitors();
            OopHandle givenHandle = obj.getHandle();
            for (Iterator itr = monitors.iterator(); itr.hasNext();) {
                MonitorInfo mi = (MonitorInfo) itr.next();
                if (mi.eliminated() && frame.isCompiledFrame()) continue; // skip eliminated monitor
                if (givenHandle.equals(mi.owner())) {
                    res++;
                }
            }
            frame = (JavaVFrame) frame.javaSender();
        }

View Full Code Here

        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) {

View Full Code Here

        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);

View Full Code Here

    }


    private ValueImpl getSlotValue(StackValueCollection values,
                       BasicType variableType, int ss) {
        ValueImpl valueImpl = null;
        OopHandle handle = null;
        ObjectHeap heap = vm.saObjectHeap();
        if (variableType == BasicType.T_BOOLEAN) {
            valueImpl = (BooleanValueImpl) vm.mirrorOf(values.booleanAt(ss));
        } else if (variableType == BasicType.T_CHAR) {
            valueImpl = (CharValueImpl) vm.mirrorOf(values.charAt(ss));

View Full Code Here

TOP

Related Classes of sun.jvm.hotspot.debugger.OopHandle

sun.jvm.hotspot.jdi.ObjectReferenceImpl

sun.jvm.hotspot.jdi.ThreadReferenceImpl

sun.jvm.hotspot.jdi.StackFrameImpl

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.