Build Warning on Solaris with the Forte C++ 6 Update 2

[Frank Fock]

Hi Nick,

It could be a too small stack size for the threads in
the main thread pool (I can remember that there was
a similar discussion lately).

Do you have tried to run it with a trace level for
DEBUG set to 0? Does the problem dissapear?
Also, are you using the latest AGENT++ version?

Best regards,
Frank

Nick Woods wrote:
> I have enclosed the following backtraces caused by a SIGSEGV (signal 11) that I seem to get on a pretty regular basis when starting up my process which uses agent++.  It does not happen every time but maybe one out of every 5 times.  When the machine has less processes running the problem seems to occur less frequently.  Has anyone seen a crash similar to this or know what I might doing wrong.  I have not yet gone through the agent++ code to examine the lines mentioned but will do that next.  I can also try to enclose the code I am using to set up the agent if that will help.  One more point that may be of interest is that I had been using the libraries without any problem for the last year or so with versions <= agent++v3.5h and snmp++v3.1.4a.  It seems like the problems began with more recent upgrades for me and I have not made any significant changes to the way I call those libraries for a long time.
> 
>>From gdb:
> 
> #4  0x4084cb53 in pthread_sighandler_rt (signo=11, si=0x411c2690, uc=0x411c2710) at signals.c:121
> #5  <signal handler called>
> #6  chunk_free (ar_ptr=0x40b6b300, p=0x80913c8) at malloc.c:3180
> #7  0x40ab73f4 in __libc_free (mem=0x80913d0) at malloc.c:3154
> #8  0x409f7346 in __builtin_delete (ptr=0x80913d0) at ../../gcc/cp/new2.cc:-1
> #9  0x409f736f in __builtin_vec_delete (ptr=0x80913d0) at ../../gcc/cp/new2.cc:-1
> #10 0x408d0186 in Agentpp::LogEntryImpl::~LogEntryImpl (this=0x80913c0, __in_chrg=3) at log.cpp:246
> #11 0x4092dd84 in Agentpp::DefaultLog::delete_log_entry () at ../include/log.h:558
> #12 0x408d161d in Agentpp::thread_starter (t=0x8091388) at threads.cpp:469
> #13 0x40849c6f in pthread_start_thread (arg=0x411c2be0) at manager.c:284
> 
>>From gcc backtrace_symbols call from within program:
> 
> /lib/i686/libpthread.so.0[0x4084cb53]
> /lib/i686/libc.so.6[0x40a64950]
> /lib/i686/libc.so.6(__libc_free+0xb4)[0x40ab73f4]
> /usr/lib/libstdc++-libc6.2-2.so.3(__builtin_delete+0x22)[0x409f7346]
> /usr/lib/libstdc++-libc6.2-2.so.3(__builtin_vec_delete+0x1b)[0x409f736f]
> /toolroot/lib/libagent++.so(Agentpp::LogEntryImpl::~LogEntryImpl(void)+0x36)[0x408d0186]
> /toolroot/lib/libagent++.so(Agentpp::DefaultLog::delete_log_entry(void)+0x48)[0x4092dd84]
> /toolroot/lib/libagent++.so(Agentpp::thread_starter(void *)+0x109)[0x408d161d]
> /lib/i686/libpthread.so.0[0x40849c6f]
> /lib/i686/libc.so.6(__clone+0x3a)[0x40b23b2a]
> 
> Thanks,
> 
> Nick
>