Re: Garbage collector: Out of memory (when running AWT/SWING code on arm-linux)

ffileppo ffileppo@libero.it
Mon Jun 9 08:13:00 GMT 2008


> ffileppo wrote:
> >> Hi guys,
> >>
> >> I'm getting the following error:
> >>
> >> GC Warning: Out of Memory! Returning NIL!
> >>
> >> when I try to run any AWT/SWING code compiled with arm-linux-gcj on my embedded box (PXA270 - 128MB Ram). (Other code just runs fine)
> >>
> >> For example this code:
> >>
> >> import javax.swing.*;
> >>
> >> public class SimpleFrame {
> >>   public static void main(String args[]) {
> >>     System.out.println("Check 1");
> >>     JFrame f = new JFrame("Simple Frame");
> >>     System.out.println("Check 2");
> >>     f.setSize(200,100);
> >>     f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
> >>     f.setVisible(true);
> >>   }
> >> }
> >>
> >> gives out of memory error after printing "Check 1".
> >> Trying with some other code I can see that the first AWT/SWING call causes this error.
> >>
> >> Any idea to fix / debug this problem?
>
> I think I've found it.  The unwinder is infinitely looping 'til it runs out
> of memory.
>
> Some library somewhere has probably has invalid unwind information.
>
> Add this line to _Jv_StackTrace::UnwindTraceFn in stacktrace.cc:
>
> *** stacktrace.cc~      Tue Sep  4 19:00:31 2007
> --- stacktrace.cc       Fri Jun  6 17:42:25 2008
> ***************
> *** 110,115 ****
> --- 110,117 ----
>     // Check if the trace buffer needs to be extended.
>     if (pos == state->length)
>       {
> +       return _URC_END_OF_STACK;
> +
>         int newLength = state->length * 2;
>         void *newFrames = _Jv_AllocBytes (newLength * sizeof(_Jv_StackFrame));
>         memcpy (newFrames, state->frames, state->length * sizeof(_Jv_StackFrame));
>
> This will prevent more than 100 stack frames from being traced.
>
> Andrew.
>


I confirm it's working now.

Thank you Andrew, you saved me...again

Francesco



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