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

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