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  1. JDK
  2. JDK-4326260

JDB runs incorrectly under the Hotspot VM

    Details

    • Subcomponent:
    • CPU:
      x86, sparc
    • OS:
      solaris_7, windows_nt

      Description



      Name: dkC59003 Date: 03/30/2000



      The JDB is called to run the very simple application
      (see java source below).
      Then the "stop in regresab45.main" and "run" JDB commands
      are given. After breakpoint the "cont" JDB command is
      given and JDB is expected to finish.

      But the further behaviour of the JDB is not correct -
      one more breakpoint happens.
      After this on Solaris the application hangs.
      On Win32 the application does not hang and the
      next "cont" JDB command after the second unexpected
      breakpoint completes the application and JDB.

      These failures happen with the following HotSpot VMs:
      Java HotSpot Client VM (build 1.3.0rc2-Y) on Solaris;
      Java HotSpot Server VM (build 2.0rc2-D) on Win32;
      Java HotSpot Client VM (build 1.3.0rc2-Y) on Win32;


      This bug prevents the regression test (testbase_nsk)
      nsk/regression/regresab45 to pass.

      Under the Classic VM the JDB runs well.
      The HotSpot Client VM (build 1.3.0rc1-T) on Win32 is OK too.


      See logs:

      on Solaris:

      % java -version
      java version "1.3.0rc2"
      Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0rc2-Y)
      Java HotSpot(TM) Client VM (build 1.3.0rc2-Y, interpreted mode)

      % jdb regresab45
      Initializing jdb...
      > stop in regresab45.main
      Deferring breakpoint regresab45.main.
      It will be set after the class is loaded.
      > run
      run regresab45
      Java HotSpot(TM) Client VM warning: Setting of property "java.compiler" is ignored

      VM Started: > Set deferred breakpoint regresab45.main

      Breakpoint hit: thread="main", regresab45.main(), line=7, bci=0
        7 System.out.println("===> started");

      main[1] cont

      Breakpoint hit: thread="main", regresab45.main(), line=7, bci=0
        7 System.out.println("===> started");

      main[1] > cont
      Nothing suspended.
      > exit
      %
       
      on Win32:

      $ java -version
      java version "1.3.0rc2"
      Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0rc2-Y)
      Java HotSpot(TM) Client VM (build 1.3.0rc2-Y, mixed mode)

      $ jdb regresab45
      Initializing jdb...
      > stop in regresab45.main
      Deferring breakpoint regresab45.main.
      It will be set after the class is loaded.
      > run
      run regresab45
      Java HotSpot(TM) Client VM warning: Setting of property "java.compiler" is ignored
      >
      VM Started: Set deferred breakpoint regresab45.main

      Breakpoint hit: thread="main", regresab45.main(), line=7, bci=0
        7 System.out.println("===> started");

      main[1] cont
      >
      Breakpoint hit: thread="main", regresab45.main(), line=7, bci=0
        7 System.out.println("===> started");

      main[1] cont
      ===> started
      ===> finished
      >
      The application exited


      Under HotSpot Client VM (build 1.3.0rc1-T):

      $ java -version
      java version "1.3.0rc1"
      Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0rc1-U)
      Java HotSpot(TM) Client VM (build 1.3.0rc1-T, mixed mode)

      $ jdb regresab45
      Initializing jdb...
      > stop in regresab45.main
      Deferring breakpoint regresab45.main.
      It will be set after the class is loaded.
      > run
      run regresab45
      Java HotSpot(TM) Client VM warning: Setting of property "java.compiler" is ignored
      >
      VM Started: Set deferred breakpoint regresab45.main

      Breakpoint hit: thread="main", regresab45.main(), line=7, bci=0
        7 System.out.println("===> started");

      main[1] cont
      > ===> started
      ===> finished

      The application exited


      See java source - regresab45.java:
      ------------------------------------------------------------
      // File: %Z%%M% %I% %E%
      // Copyright %G% Sun Microsystems, Inc. All Rights Reserved

      class regresab45 {

          public static void main(String args[]) {
              System.out.println("===> started");
              System.out.println("===> finished");
          }
      } // end of regresab45 class
      ------------------------------------------------------------

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

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              • Assignee:
                dcubed Daniel Daugherty
                Reporter:
                dkhukhrosunw Dmitry Khukhro (Inactive)
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                  Updated:
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