Name: akC57697 Date: 09/30/98




 The AWTEvent.freeNativeData() gets SEGV in JDK 1.2 FCS L.
 The example fails on :
   Solaris 2.5.1 without patch
   Solaris 2.5.1 patched (Patches: 103600-14,103640-08)
   Solaris 2.6 without patch
   (not tested under patched Solaris 2.6)
  Not reproducible under Win32.

 
The example to reproduce SEGV:
--------------------------------8-<---------------------------
import java.awt.event.*;
import java.awt.*;

public class Test {
  public static void main(String[] argv) {
    
  Component[] sources={new Canvas(), new Button("Stop")};
  
  /**
   * These values are used as parameters for InputEvent constructor
   */
  int[] ids={
  
             Integer.MIN_VALUE,
             Integer.MIN_VALUE+1,
             InputEvent.COMPONENT_FIRST-1,
             InputEvent.COMPONENT_FIRST,
             InputEvent.COMPONENT_MOVED,
             InputEvent.COMPONENT_RESIZED,
             InputEvent.COMPONENT_SHOWN,
             InputEvent.COMPONENT_HIDDEN,
             InputEvent.COMPONENT_LAST+1,
             Integer.MAX_VALUE-1,
             Integer.MAX_VALUE

            };
  

  /**
   * These values are used as parameters for InputEvent constructor
   */
  long[] whens={
             Long.MIN_VALUE,
             Long.MIN_VALUE+1,
             0,
             Long.MAX_VALUE
             
             };
  
  /**
   * These values are used as parameters for InputEvent constructor
   */
  int[] modifiers={
             Integer.MIN_VALUE,
             Integer.MIN_VALUE+1,
             InputEvent.SHIFT_MASK,
             InputEvent.CTRL_MASK ,
             InputEvent.META_MASK,
             InputEvent.ALT_MASK,
             InputEvent.BUTTON1_MASK+InputEvent.ALT_MASK,
             InputEvent.SHIFT_MASK+InputEvent.CTRL_MASK+InputEvent.ALT_MASK,
             InputEvent.CTRL_MASK+InputEvent.META_MASK,
             100,
             Integer.MAX_VALUE-1,
             Integer.MAX_VALUE
               
             };


     for (int s=0; s<sources.length; s++)
     for (int i=0; i<ids.length; i++)
     for (int w=0; w<whens.length; w++)
     for (int m=0; m<modifiers.length; m++) {
      // InputEvent is an abstract class with no public/protected
      // constructors, so using KeyEvent constructor
       
     System.out.println(s+" "+i+" "+w+" "+m);
       InputEvent ev=
         new KeyEvent(sources[s],ids[i],whens[w],modifiers[m],0,'c');
    }
     
    System.out.println("OKAY");
    System.exit(0);
  }
}
--------------------------------8-<---------------------------

java Test
 ......
SIGSEGV 11* segmentation violation
    si_signo [11]: SIGSEGV 11* segmentation violation
    si_errno [0]: Error 0
    si_code [1]: SEGV_MAPERR [addr: 0x0]

stackpointer=ef161248

Full thread dump Classic VM (JDK-1.2fcs-L, green threads):
    "Finalizer" (TID:0xebc98320, sys_thread_t:0x699f0, state:R) prio=8
at java.awt.AWTEvent.freeNativeData(Native Method)
at java.awt.AWTEvent.finalize(Compiled Code)
at java.lang.ref.Finalizer.invokeFinalizeMethod(Native Method)
at java.lang.ref.Finalizer.runFinalizer(Compiled Code)
at java.lang.ref.Finalizer.access$1(Compiled Code)
at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:175)
    "Reference Handler" (TID:0xebc983b0, sys_thread_t:0x650b8, state:CW) prio=10
at java.lang.Object.wait(Native Method)
at java.lang.Object.wait(Compiled Code)
at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:209)
    "Signal dispatcher" (TID:0xebc983e0, sys_thread_t:0x5e888, state:CW) prio=5
    "main" (TID:0xebc981e0, sys_thread_t:0x26668, state:R) prio=5
at java.lang.String.<init>(Compiled Code)
at java.lang.Integer.toString(Compiled Code)
at java.lang.Integer.toString(Compiled Code)
at java.lang.String.valueOf(Compiled Code)
at Test.main(Compiled Code)
Monitor Cache Dump:
    java.lang.ref.Reference$Lock@EBC983C0/EBCCDB20: <unowned>
Waiting to be notified:
"Reference Handler" (0x650b8)
Registered Monitor Dump:
    PCMap lock: <unowned>
    utf8 hash table: <unowned>
    JNI pinning lock: <unowned>
    JNI global reference lock: <unowned>
    BinClass lock: <unowned>
    Class linking lock: <unowned>
    System class loader lock: <unowned>
    Code rewrite lock: <unowned>
    Heap lock: <unowned>
    Monitor cache lock: owner "Finalizer" (0x699f0) 1 entry
    Dynamic loading lock: <unowned>
    Monitor IO lock: <unowned>
    User signal monitor: <unowned>
Waiting to be notified:
"Signal dispatcher" (0x5e888)
    Child death monitor: <unowned>
    I/O monitor: <unowned>
    Alarm monitor: <unowned>
Waiting to be notified:
<unknown thread> (0x2b958)
    Thread queue lock: owner "Finalizer" (0x699f0) 1 entry
    Monitor registry: owner "Finalizer" (0x699f0) 1 entry

SIGABRT 6* abort (generated by abort(3) routine)
    si_signo [6]: SIGABRT 6* abort (generated by abort(3) routine)
    si_errno [0]: Error 0
    si_code [0]: SI_USER [pid: 5754, uid: 302]
stackpointer=ef161248

Full thread dump Classic VM (JDK-1.2fcs-L, green threads):
    "Finalizer" (TID:0xebc98320, sys_thread_t:0x699f0, state:R) prio=8
at java.awt.AWTEvent.freeNativeData(Native Method)
at java.awt.AWTEvent.finalize(Compiled Code)
at java.lang.ref.Finalizer.invokeFinalizeMethod(Native Method)
at java.lang.ref.Finalizer.runFinalizer(Compiled Code)
at java.lang.ref.Finalizer.access$1(Compiled Code)
at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:175)
    "Reference Handler" (TID:0xebc983b0, sys_thread_t:0x650b8, state:CW) prio=10
at java.lang.Object.wait(Native Method)
at java.lang.Object.wait(Compiled Code)
at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:209)
    "Signal dispatcher" (TID:0xebc983e0, sys_thread_t:0x5e888, state:CW) prio=5
    "main" (TID:0xebc981e0, sys_thread_t:0x26668, state:R) prio=5
at java.lang.String.<init>(Compiled Code)
at java.lang.Integer.toString(Compiled Code)
at java.lang.Integer.toString(Compiled Code)
at java.lang.String.valueOf(Compiled Code)
at Test.main(Compiled Code)
Monitor Cache Dump:
    java.lang.ref.Reference$Lock@EBC983C0/EBCCDB20: <unowned>
Waiting to be notified:
"Reference Handler" (0x650b8)
Registered Monitor Dump:
    PCMap lock: <unowned>
    utf8 hash table: <unowned>
    JNI pinning lock: <unowned>
    JNI global reference lock: <unowned>
    BinClass lock: <unowned>
    Class linking lock: <unowned>
    System class loader lock: <unowned>
    Code rewrite lock: <unowned>
    Heap lock: <unowned>
    Monitor cache lock: owner "Finalizer" (0x699f0) 1 entry
    Dynamic loading lock: <unowned>
    Monitor IO lock: <unowned>
    User signal monitor: <unowned>
Waiting to be notified:
"Signal dispatcher" (0x5e888)
    Child death monitor: <unowned>
    I/O monitor: <unowned>
    Alarm monitor: <unowned>
Waiting to be notified:
<unknown thread> (0x2b958)
    Thread queue lock: owner "Finalizer" (0x699f0) 1 entry
    Monitor registry: owner "Finalizer" (0x699f0) 1 entry

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

----------------- stevef@eng 10/8/98 ----------
We are seeing a JCK test failure in our "singleJVM" test mode that looks
like the "AWTEvent.freeNativeData" problem. We see this repeatedly on "M".
We have quite a few test cases that create AWTEvents, so this may be
difficult for us to work around. "singleJVM" test mode tends to exercise
garbage collection.