SA-JDI: ThreadReference.name() and status() throw NPE for not running threads

Name: ipR10196 Date: 03/02/2004


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Test : nsk/sajdi/ThreadReference/status/status001
VM : ClientVM, ServerVM
Mode : all
Platform : generic
OS : generic
JDK : 1.5.0-beta2-b40 and earlier
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This test checks if ThreadReference methods such as
name(), status(), isSuspended(), suspendCount(), toString()
are working correctly for not running threads (i.e,, not
started or already finished threads).

With SA-JDI connectors name(), status() and toString() throw
NullPointerException for not running threads. With legacy
JDI connectors these functions are working well.

Here is typical test output:
------------------------------------------------------------------
    thread #0
    java.lang.NullPointerException
        at sun.jvm.hotspot.jdi.ThreadReferenceImpl.name(ThreadReferenceImpl.java:73)
        at nsk.sajdi.ThreadReference.status.status001.checkThread(status001.java:174)
        at nsk.sajdi.ThreadReference.status.status001.runIt(status001.java:146)
        at nsk.sajdi.ThreadReference.status.status001.run(status001.java:26)
        at nsk.sajdi.ThreadReference.status.status001.main(status001.java:21)
# ERROR: ThreadReference.name() throws unexpected exception:
# ERROR: thread nom: 0
# ERROR: thread name: threadFinished
# ERROR: exception: java.lang.NullPointerException
    java.lang.NullPointerException
        at sun.jvm.hotspot.jdi.ThreadReferenceImpl.status(ThreadReferenceImpl.java:99)
        at nsk.sajdi.ThreadReference.status.status001.checkThread(status001.java:188)
        at nsk.sajdi.ThreadReference.status.status001.runIt(status001.java:146)
        at nsk.sajdi.ThreadReference.status.status001.run(status001.java:26)
        at nsk.sajdi.ThreadReference.status.status001.main(status001.java:21)
# ERROR: ThreadReference.status() throws unexpected exception:
# ERROR: thread nom: 0
# ERROR: thread name: threadFinished
# ERROR: exception: java.lang.NullPointerException
      suspendCount: 0
      isSuspended: true
      isAtBreakpnt: false
      class type: class nsk.sajdi.ThreadReference.status.status001aThreadFinished
                    (loaded by instance of sun.misc.Launcher$AppClassLoader(id=0))
      class name: nsk.sajdi.ThreadReference.status.status001aThreadFinished
    java.lang.NullPointerException
        at sun.jvm.hotspot.jdi.ThreadReferenceImpl.name(ThreadReferenceImpl.java:73)
        at sun.jvm.hotspot.jdi.ThreadReferenceImpl.toString(ThreadReferenceImpl.java:304)
        at nsk.sajdi.ThreadReference.status.status001.checkThread(status001.java:265)
        at nsk.sajdi.ThreadReference.status.status001.runIt(status001.java:146)
        at nsk.sajdi.ThreadReference.status.status001.run(status001.java:26)
        at nsk.sajdi.ThreadReference.status.status001.main(status001.java:21)
# ERROR: ThreadReference.toString() throws unexpected exception:
# ERROR: thread nom: 0
# ERROR: thread name: threadFinished
# ERROR: exception: java.lang.NullPointerException
      virtMachine: JVM version 1.5.0-beta2 (Java HotSpot(TM) Client VM, mixed mode)
------------------------------------------------------------------

To reproduce this failure:
  cd /net/jano.sfbay/export/disk20/GammaBase/Bugs/<this bug number>
  sh build.sh $JAVA_HOME
  sh run.sh [-pid | -core | -socket] [-g] [-v] $JAVA_HOME [JAVA_OPTS]
where:
    -pid - run test with SA-JDI pid attaching connector (default)
    -core - run test with SA-JDI core attaching connector
    -socket - run test with JDI socket attaching connector
    -g - run test with java_g binaries
    -v - run test in verbose mode

This test will appear in the next r27 testbase release.
Running on Linux this test may fail due to known bug:
4996081 SA-JDI: SAPIDAttachingConnector.attach() throws IOEception on RH AS2.1

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Name: ipR10196 Date: 03/03/2004


ThreadReference.frameCount() also throws NullPointerException
for not running threads and the following test failed:

  nsk/sajdi/ThreadReference/frames/frames001

java.lang.NullPointerException
        at sun.jvm.hotspot.jdi.ThreadReferenceImpl.privateFrames(ThreadReferenceImpl.java:183)
        at sun.jvm.hotspot.jdi.ThreadReferenceImpl.frameCount(ThreadReferenceImpl.java:152)
        at nsk.sajdi.ThreadReference.frames.frames001.checkThread(frames001.java:190)
        at nsk.sajdi.ThreadReference.frames.frames001.runIt(frames001.java:146)
        at nsk.sajdi.ThreadReference.frames.frames001.run(frames001.java:26)
        at nsk.sajdi.ThreadReference.frames.frames001.main(frames001.java:21)
# ERROR: ThreadReference.frameCount() throws unexpected exception:
# ERROR: thread nom: 0
# ERROR: thread name: threadFinished
# ERROR: exception: java.lang.NullPointerException
# ERROR: ThreadReference.frameCount() throws unexpected exception:
# ERROR: thread nom: 1
# ERROR: thread name: threadNotStarted
# ERROR: exception: java.lang.NullPointerException


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