RE: hanging

["Boehm, Hans" <hans dot boehm at hp dot com>]

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
> 
> 
>