Re: Debugging a NullPointerException in fstack

[Ray Ruvinskiy <rruvinsk at sybase dot com>]

Phil,

Thank you very much for the tips. I have filed a bug with the debug  
logging output.

In general, I was wondering what the best way to debug gcj problems  
is. Is it possible to make it so that when a program compiled with gcj  
throws an exception, the stack trace is displayed, like it would be if  
a jar file is run with Sun's jre? Is there any hope in getting gdb to  
meaningfully debug gcj-compiled binaries?

Thanks,

Ray


On 10-Jun-08, at 3:20 AM, Phil Muldoon wrote:

> Ray Ruvinskiy wrote:
> > Hello,
>
> Hi Ray,
>
> Thanks for the report. The first thing I would do is to file a bug at:
>
> http://sourceware.org/bugzilla/enter_bug.cgi?product=frysk
>
> To track the issue. I would not worry too much about semantics of  
> the bug reports, or whether it is a duplicate. The report itself is  
> valuable even if it does already exist. Typically when I file a  
> report I'll put in whether I run Frysk from RPM, or built from  
> source. And what OS you are running it on. And just include all the  
> output of the tool. If fstack is failing with an NPE on some  
> processes not others, it is most certainly a programming error  
> somewhere.
>
> From a more in depth perspective, if you build from source, you can  
> test the sanity of your environment particular to your system by  
> running the Frysk testsuite. I normally cd into frysk-core/ and  
> run ./TestRunner. You can do this from each sub-component, or if you  
> like, run make check instead.
>
> Lastly if you want to jump straight in, fix the problem yourself,  
> and submit a patch, try turning debug logging on with something like:
>
> ./frysk/bindir/fstack -debug frysk=FINE 1234
>
> But even if you do try to hack on it yourself, please do file a bug  
> and assign it to yourself. We know who is hacking on what then.
>
> Best of luck and hope to see you on IRC!
>
> Regards
>
> Phil Muldoon
>
> >