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  1. JDK
  2. JDK-4989580

JVMTI generates events even if corresponding capability is not added

    Details

    • Subcomponent:
    • Resolved In Build:
      b42
    • CPU:
      generic
    • OS:
      generic
    • Verification:
      Verified

      Description

      Summary:
      The JVMTI specs says that any needed capabilities must be possessed in order to get events, but does not indicate the error code returned in this case.
      See Suggested Fix.
      ###@###.### 2004-02-27

      ---------------------------------

      Name: vpR10197 Date: 02/05/2004


      --------------------------------------
      Test : nsk/jvmti/scenarios/events/EM07/em07t001
      VM : ClientVM, ServerVM
      Mode : all
      Platform : all
      OS : all
      JDK : 1.5.0-b36 and earlier
      ----------------------------------------

      The test doesn't set any capabilities and checks that no events of optional
      functionality will be sent.
      The test reveals that current implementation of JVMTI generates events even
      if corresponded capability is not added. It conflicts with Events/HandlingEvents
      section of JVMTI specification which says "...to receive any event the following
      three steps must be done:
         - if the event requires a capability, that capability must be added.
         - callback for the event must be set.
         - event must be enabled."

      Please note that at the same time such behaviour could be interpreted as legal
      according to EventManagement/SetEventCallbacks section which says:
      "...An event must be enabled and have a callback in order to be sent..."

      To reproduce the failure:
         cd /net/jano.sfbay/export/disk20/GammaBase/Bugs/<this bug number>
         sh build.sh $JAVA_HOME [-g]
         sh run.sh $JAVA_HOME [-g] [-v] [JAVA_OPTS]
      where
           -g - run test with java_g binaries
           -v - run test in verbose mode

      Here is test output:

      - jvmti_events.c, 122:
      - jvmti_events.c, 123: Possessed capabilities:
      - jvmti_events.c, 124: -----------------------
      - jvmti_events.c, 190:
      - em07t001.c, 219: Enable events
      debuggee> Timeout = 120000 msc.
      - em07t001.c, 322: Wait for debuggee to become ready
      # ERROR: em07t001.c, 258: Unexpected amount of events 366804 for
      JVMTI_EVENT_SINGLE_STEP
              expected value is 0
      # ERROR: em07t001.c, 258: Unexpected amount of events 201 for
      JVMTI_EVENT_NATIVE_METHOD_BIND
              expected value is 0
      # ERROR: em07t001.c, 258: Unexpected amount of events 13 for
      JVMTI_EVENT_COMPILED_METHOD_LOAD
              expected value is 0
      # ERROR: em07t001.c, 258: Unexpected amount of events 47 for
      JVMTI_EVENT_VM_OBJECT_ALLOC
              expected value is 0
      - em07t001.c, 33:
      - em07t001.c, 34: Event statistics
      - em07t001.c, 35: ----------------
      - em07t001.c, 40: JVMTI_EVENT_SINGLE_STEP 366804
      - em07t001.c, 40: JVMTI_EVENT_NATIVE_METHOD_BIND 201
      - em07t001.c, 40: JVMTI_EVENT_COMPILED_METHOD_LOAD 13
      - em07t001.c, 40: JVMTI_EVENT_VM_OBJECT_ALLOC 47
      - em07t001.c, 329: Let debuggee to finish
      # ERROR: debuggee> Test FAILED
      ======================================================================


      Name: vpR10197 Date: 02/29/2004


      The bug also affects the following tests:
          nsk/jvmti/scenarios/events/EM02/em02t001
          nsk/jvmti/scenarios/events/EM02/em02t002
          nsk/jvmti/scenarios/events/EM02/em02t003
          nsk/jvmti/scenarios/events/EM02/em02t004
      These tests will appear in the next r27 testbase release.

      ======================================================================

      Name: vpR10197 Date: 03/09/2004


      The bug also affects the following tests:
          nsk/jvmti/scenarios/events/EM02/em02t005
          nsk/jvmti/scenarios/events/EM02/em02t006
          nsk/jvmti/scenarios/events/EM02/em02t007
          nsk/jvmti/scenarios/events/EM02/em02t008
          nsk/jvmti/scenarios/events/EM02/em02t009
          nsk/jvmti/scenarios/events/EM02/em02t010
          nsk/jvmti/scenarios/events/EM02/em02t011
          nsk/jvmti/scenarios/events/EM02/em02t012
      These tests will appear in the next r27 testbase release.

      ======================================================================

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              • Assignee:
                rfield Robert Field
                Reporter:
                vitpsunw Vitp Vitp (Inactive)
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