🚀 go-pugleaf

Hi. My program core dumps with a Bus Error. gdb points to a call to
realfree() in libc.so as the point of failure. The call in my code
which leads to this problem is this instantiation of ostrstream inside
of a while() loop:

  ostrsream msg;

Below, I'm including a better listing of the code. The program has the
main thread plus another 2 threads. The above line is in the main
thread. The program ran for 3 hrs before it dumped.

My question is: am using the correct flags for multithreaded support?
Is anyone experiencing problems with iostream operations in a
multithreaded program?

These are the flags I'm using for compiling: -c -g -pthreads -Wall
-Wpointer-arith -O2 -fcheck-new -D_REENTRANT -D__STL_PTHREADS
-DBOOST_SMART_PTR_CONVERSION -DSMART_PTR_BH_ENHANCED

g++ -v is:
Configured with: ../configure --with-as=/usr/local/bin/as
--with-ld=/usr/local/bin/ld --enable-libgcj
Thread model: posix
gcc version 3.0.3 using libstdc++.so.3.0.2 


My version of UNIX is Solaris 8:
SunOS sybdev2 5.8 Generic_108528-07 sun4u sparc SUNW,Ultra-60

Here is a listing of the lines around the problem:

  while ( continueWorking() )  // returns true from 8am to 6pm
  {
    recvBuf[0] = '\x0';

    if ( (byteCnt = receiverSock->recv(recvBuf, 1024 * 4, senderAddr))
>= 0 )
    {
      if ( byteCnt > 0 )
      {
        recvBuf[byteCnt] = '\x0';

        // ... code locking a mutex and inserting recvBuf[] 
        // into a shared std::vector ...

        ostrstream msg;		<<<---- THIS IS WERE THE CORE ORIGINATES

        msg << "Received " << byteCnt << " bytes from ";
        msg << senderAddr.get_host_name();
        msg << ":" << senderAddr.get_port_number();
        msg << ". Data is: '" << recvBuf << "'";

        logger->log(msg);
      }
    }
  }

Here is the output from gdb when analyzing the core (Bus Error):

#0  0xff0c1ba0 in realfree () from /usr/lib/libc.so.1
#1  0xff0c23a4 in cleanfree () from /usr/lib/libc.so.1
#2  0xff0c14d8 in _malloc_unlocked () from /usr/lib/libc.so.1
#3  0xff0c13cc in malloc () from /usr/lib/libc.so.1
#4  0xff1e77c8 in _Znwj (sz=16)
    at ../../../../libstdc++-v3/libsupc++/new_op.cc:47
#5  0xff1e794c in _Znaj (sz=16)
    at ../../../../libstdc++-v3/libsupc++/new_opv.cc:36
#6  0xff1e47b8 in _ZNSt12strstreambuf8_M_allocEj (this=0xffbef464,
n=16)
    at ../../../../libstdc++-v3/src/strstream.cc:316
#7  0xff1e36dc in _ZNSt12strstreambufC1Ei (this=0xffbef464,
initial_capacity=0)
    at ../../../../libstdc++-v3/src/strstream.cc:69
#8  0xff1e533c in _ZNSt10ostrstreamC1Ev (__vtt_parm=0xffbef460)
    at ../../../../libstdc++-v3/src/strstream.cc:383
#9  0x1b6d0 in _ZN16PosSummaryServer8receiverEv (this=0xffbef7b0)
    at pss2.cpp:74
#10 0x1d22c in _ZN16PosSummaryServer4mainEiPPc (this=0xffbef7b0,
argc=223824,
    argv=0xffbef708) at pss2.cpp:282
#11 0x1ab4c in main (argc=2, argv=0xffbef944) at pss.cpp:59