Name: mc57594 Date: 02/12/97


1) Run program and click on canvas to bring up dialog.
    Hit the "Cancel" button to destroy the dialog, java will
    core dump.
2)
 $ more my_dialog.java
 
import java.awt.TextField;
import java.awt.Button;
import java.awt.Component;
import java.awt.Panel;
import java.awt.Frame;
import java.awt.GridLayout;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.ScrollPane;
import java.awt.Label;
import java.awt.Event;
import java.awt.Dialog;
 
 
 
class my_dialog extends Dialog
{
 
  Button ok_, cancel_;
  TextField textField_;
 
 
  my_dialog(Frame parent, String title, boolean modal)
  {
    super(parent, title, modal);
 
    Panel p1 = new Panel();
    Panel main_ = new Panel();
    ScrollPane sp = new ScrollPane();
    sp.add(main_);
    p1.setLayout(new GridLayout(1,2));
    GridBagConstraints gbc_ = new GridBagConstraints();
    gbc_.fill = GridBagConstraints.NONE;


    GridBagLayout gbl_ = new GridBagLayout();
    main_.setLayout(gbl_);

    int x,y;
    
    for (int i = 0; i < 400; i++)
    {
      TextField t = new TextField("intpu", 10);
      x = i % 15;
      y = i % 500;
      
      System.out.println(x+" "+y);

      constrain(t, gbl_, gbc_, x, y, 5, 1);
      main_.add(t);
    }

    p1.add(sp);

    // Create dialog buttons
    ok_ = new Button("Ok");
    cancel_ = new Button("Cancel");
 
    // Create a panel to contain the dialog buttons
    Panel p2 = new Panel();
    // p2.setLayout(new GridLayout(1,2));
    p2.add(ok_);
    p2.add(cancel_);
 
    add("Center", p1 );
    add("South", p2 );
    pack();
  }
 
private void
constrain(Component c, GridBagLayout gbl, GridBagConstraints gbc,
  int x, int y, int w, int h)
{
  gbc.gridx = x;
  gbc.gridy = y;
  gbc.gridwidth = w;
  gbc.gridheight = h;
  gbl.setConstraints(c, gbc);
}
 
  public boolean
  action(Event evt, Object arg)
  {
    // System.out.println("action "+evt);
    if (evt.target == ok_) {
    }
    else if (evt.target == cancel_) {
      dispose();
    }
    // carriage return same as OK
    else if(evt.target instanceof TextField) {
      if (evt.target.equals(textField_)) {
      }
    }
    else return super.action(evt, arg);
    return true;
  }
 
}
 

 more client.java
 
 
import java.awt.Dialog;
import java.awt.Frame;
import java.awt.Event;
import my_dialog;
 
class client extends Frame
{
 
 
 
  client(String title)
  {
    super(title);
    this.resize(400,400);
    System.out.println("CLIENT: I'm here");
  }
 
 
   public boolean mouseUp(Event e, int x, int y)
   {
    Dialog d = new my_dialog(this, "test dialog", true);
        d.resize(400,400);
    d.show();
    return true;
   }
 
 
        public static void main(String args[])
        {
    new client("CLIENT").show();
        }
}


3)
SIGSEGV 11* segmentation violation
    si_signo [11]: SIGSEGV 11* segmentation violation
    si_errno [0]: Error 0
    si_code [1]: SEGV_ACCERR [addr: 0x24]

stackbase=EDF82000, stackpointer=EDF817E0

Full thread dump:
    "Screen Updater" (TID:0xee710040, sys_thread_t:0xedf21de0, state:CW) prio=3
java.lang.Object.wait(Object.java)
sun.awt.ScreenUpdater.nextEntry(ScreenUpdater.java:78)
sun.awt.ScreenUpdater.run(ScreenUpdater.java:100)
    "AWT-Dispatch-Proxy" (TID:0xee7100e8, sys_thread_t:0xedf81de0, state:R) prio=5 *current thread*
java.awt.Component.removeNotify(Component.java)
java.awt.TextComponent.removeNotify(TextComponent.java)
java.awt.Container.removeNotify(Container.java)
java.awt.Container.removeNotify(Container.java)
java.awt.Container.removeNotify(Container.java)
java.awt.Container.removeNotify(Container.java)
java.awt.Window.dispose(Window.java)
my_dialog.action(my_dialog.java:89)
java.awt.Component.handleEvent(Component.java)
java.awt.Window.postEvent(Window.java)
java.awt.Component.postEvent(Component.java)
java.awt.Component.postEvent(Component.java)
java.awt.Component.dispatchEvent(Component.java)
java.awt.EventDispatchThread.run(EventDispatchThread.java)
    "AWT-Motif" (TID:0xee7042a0, sys_thread_t:0xedfb1de0, state:CW) prio=5
java.lang.Thread.run(Thread.java)
    "AWT-Input" (TID:0xee704280, sys_thread_t:0xedfe1de0, state:CW) prio=5
    "AWT-EventQueue" (TID:0xee704250, sys_thread_t:0xee011de0, state:CW) prio=5
java.awt.EventQueue.getNextEvent(EventQueue.java)
java.awt.EventDispatchThread.run(EventDispatchThread.java)
    "Finalizer thread" (TID:0xee7002f8, sys_thread_t:0xee2c1de0, state:CW) prio=1
    "Async Garbage Collector" (TID:0xee7002b0, sys_thread_t:0xee2f1de0, state:CW) prio=1
    "Idle thread" (TID:0xee700268, sys_thread_t:0xee3c1de0, state:R) prio=0
    "Clock" (TID:0xee700180, sys_thread_t:0xee3f1de0, state:CW) prio=12
    "main" (TID:0xee700150, sys_thread_t:0x642d0, state:CW) prio=5
Monitor Cache Dump:
 unknown key (key=0xee2f1de0): unowned
Waiting to be notified:
    "Async Garbage Collector"
 java.awt.EventQueue@EE704238/EE751008 (key=0xee704238): unowned
Waiting to be notified:
    "AWT-EventQueue"
         sun.awt.motif.MToolkit@EE704220/EE74C220 (key=0xee704220): monitor owner edf81de0: "AWT-Dispatch-Proxy"
Waiting to be notified:
    "AWT-Motif"
 sun.awt.ScreenUpdater@EE710040/EE784330 (key=0xee710040): unowned
Waiting to be notified:
    "Screen Updater"
Registered Monitor Dump:
    Thread queue lock: unowned
Waiting to be notified:
    "main"
    Name and type hash table lock: unowned
    String intern lock: unowned
    JNI global reference lock: unowned
    BinClass lock: unowned
    Class loading lock: unowned
    Java stack lock: unowned
    Code rewrite lock: unowned
    Heap lock: unowned
    Has finalization queue lock: unowned
    Finalize me queue lock: unowned
        Waiting to be notified:
            "Finalizer thread"
    Monitor IO lock: unowned
    Child death monitor: unowned
    Event monitor: unowned
    I/O monitor: unowned
        Waiting to be notified:
            "AWT-Input"
    Alarm monitor: unowned
        Waiting to be notified:
            "Clock"
    Sbrk lock: unowned
    Monitor cache expansion lock: unowned
    Monitor registry: monitor owner edf81de0: "AWT-Dispatch-Proxy"
Thread Alarm Q:
    sys_thread_t 0xedfe1de0 [Timeout in 20 ms]
    sys_thread_t 0xee2f1de0 [Timeout in 291 ms]
Abort (core dumped)

4)
5) SunOS 5.5.1 Generic_103640-04 sun4u sparc SUNW,Ultra-1

company - Westinghouse , email - ###@###.###
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