RE: hanging

[Fabio Roger <fabioroger at gmail dot com>]

but how can I get the stack trace? I try to run the thing in GDB, but
there is message on GDB or anything, the application stops and for GDB
it seems nothing happened..

and it is getting worst.. now it is hanging each one/two hours.

please, any idea?


On Mon, 2005-02-28 at 11:01 -0800, Boehm, Hans wrote:
> Can you get stack traces for the hung threads?  (I have no mingw
> experience.)  In my experience on other platforms,
> nothing is above suspicion for this sort of a problem.  But given
> stack traces and some idea what each thread is waiting for, it's
> usually not too hard to debug.
> 
> There are some general hints about GC debugging at
> 
> http://www.hpl.hp.com/personal/Hans_Boehm/gc/debugging.html
> 
> but I think that's not very applicable to this problem, at
> least not yet.
> 
> Hans
> 
> > -----Original Message-----
> > From: java-owner@gcc.gnu.org [mailto:java-owner@gcc.gnu.org] 
> > On Behalf Of Fabio Roger
> > Sent: Monday, February 28, 2005 4:01 AM
> > To: java@gcc.gnu.org
> > Subject: hanging
> > 
> > 
> > hi all,
> > 
> > I need help on how to debug this particular situation: 
> > 
> > I have an application with lots of threads and native methods 
> > for hardware handling and everything works fine.. all 
> > compiled to native with gcj 3.4.0 from 
> > http://www.thisiscool.com/gcc_mingw.htm:
> > 
> > Configured with: /datal/gcc/gcc/configure -- 
> > prefix=/datal/gcc/build/wingcc --build=i686-pc-linux-gnu 
> > --host=i686-pc- mingw32 --target=i686-pc-mingw32 
> > --enable-languages=c,c++,java --with- gcc --with-gnu-as 
> > --with-gnu-ld --with-as=i686-pc-mingw32-as --with- 
> > ld=i686-pc-mingw32-ld --enable-threads=win32 --disable-nls 
> > --disable- win32-registry --disable-shared --disable-debug 
> > --without-newlib -- enable-libgcj --disable-java-awt 
> > --without-x --enable-java-gc=boehm -- disable-libgcj-debug 
> > --enable-interpreter --enable-hash-synchronization 
> > --enable-sjlj-exceptions --enable-libgcj-multifile 
> > --enable-libgcj- mingw-osapi=ansi Thread model: win32 gcc 
> > version 3.4.0 20040316 (prerelease)
> > 
> > 
> > all works fine.. BUT sometimes (like once a day) the thing 
> > just hangs.. not even the threads waiting for tcp requests, 
> > replies.. (but the OS is still ok)
> > 
> > my issue is.. I have no idea what "might" be going wrong.. 
> > and no idea how to debug the thing either.. no error msg 
> > comes up.. no exception thrown, nothing.. it just hangs..
> > 
> > any idea of what kind of thing could it be or any direction?
> > 
> > btw, how to debug the garbage collector in a gcj-compiled executable?
> > 
> > thanks!
> > 
> > Fabio Roger
> > 
> > 
> >