Ok, assuming the C code is this 3.7 VM code below I'll note that the  
backtrace shows some interesting memory addresses
> (s=0xb5aaa624,
>    buf=0xb5b3c3f4 "Content-Type:
> image/gif;\r\n\tname=\"orprxh.gif\"\r\nContent-ID:
> <orprxh.gif at 2D967531.ECA1AA47>\r\nContent-Transfer-Encoding:
> base64\r\n\r\nR0lGODlh+gHYAbMAAAAADoQAAACCAAAAfNNhDXyOxvj56/ 
> ALCgcN///2/w",
> 'A' <repeats 15 times>..., bufSize=2077)

which implies that buf is 0xb5b3c3f4. However with a 3.7 VM when   
object memory goes over the 0x80000000
you are hosed because of signed versus unsigned arithmetic issues  
with in the VM. In fact currently I'll bet this is
still an issue with even a 3.8 VM because I can't say I've seen any  
proof there has been a systematic effort to ensure memory
address doesn't accidentally become signed integers somewhere in the  
VM or platform specific files. This might be
the reason for your failures, if the VM loads object memory above the  
0x80000000 I would have thought the VM would crash immediately, if  
below and then grows to expand over the limit then crashing would  
occcur later.

On the other hand I'm not sure why you would get the SIGPIPE failure  
and why that would cause the VM to crash in libc.
That sounds like an operating system problem you should google on.


int sqSocketSendDataBufCount(SocketPtr s, int buf, int bufSize)
{
   int nsent= 0;

   if (!socketValid(s))
     return -1;

   if (UDPSocketType == s->socketType)
     {
       /* --- UDP --- */
       FPRINTF((stderr, "UDP sendData(%d, %d)\n", SOCKET(s), bufSize));
       if ((nsent= sendto(SOCKET(s), (void *)buf, bufSize, 0,
			 (struct sockaddr *)&SOCKETPEER(s),
			 sizeof(SOCKETPEER(s)))) <= 0)
	{
	  if (errno == EWOULDBLOCK)	/* asynchronous write in progress */
	    return 0;
	  FPRINTF((stderr, "UDP send failed\n"));
	  SOCKETERROR(s)= errno;
	  return 0;
	}
     }
   else
     {
       /* --- TCP --- */
       FPRINTF((stderr, "TCP sendData(%d, %d)\n", SOCKET(s), bufSize));
       if ((nsent= write(SOCKET(s), (char *)buf, bufSize)) <= 0)
	{
	  if ((nsent == -1) && (errno == EWOULDBLOCK))
	    {
	      FPRINTF((stderr, "TCP sendData(%d, %d) -> %d [blocked]",
		       SOCKET(s), bufSize, nsent));
	      return 0;
	    }
	  else
	    {
	      /* error: most likely "connection closed by peer" */
	      SOCKETSTATE(s)= OtherEndClosed;
	      SOCKETERROR(s)= errno;
	      FPRINTF((stderr, "TCP write failed -> %d", errno));
	      return 0;
	    }
	}
     }
   /* write completed synchronously */
   FPRINTF((stderr, "sendData(%d) done = %d\n", SOCKET(s), nsent));
   return nsent;
}


On 8-Nov-06, at 5:04 AM, squeakdev at reider.net wrote:

>> - Run the VM under gdb and let it crash. Try to investigate from  
>> there,
>> in particular try to print the call stacks (don't remember what the
>> magic invocation is). The VM implements both, printCallStack() to  
>> print
>> the active call stack and printAllStacks() which prints all the call
>> stacks (but I'm not sure which of those is supported in 3.7).
>
> It crashed in gdb but after only ~7 hours (so it's not clear this is
> the same issue). But here is the stack:
>
> Program received signal SIGPIPE, Broken pipe.
> 0xb7e8f2ce in __write_nocancel () from /lib/tls/libc.so.6
>
> gdb>backtrace
>
> #0  0xb7e8f2ce in __write_nocancel () from /lib/tls/libc.so.6
> #1  0x080e8936 in sqSocketSendDataBufCount (s=0xb5aaa624,
>    buf=0xb5b3c3f4 "Content-Type:
> image/gif;\r\n\tname=\"orprxh.gif\"\r\nContent-ID:
> <orprxh.gif at 2D967531.ECA1AA47>\r\nContent-Transfer-Encoding:
> base64\r\n\r\nR0lGODlh+gHYAbMAAAAADoQAAACCAAAAfNNhDXyOxvj56/ 
> ALCgcN///2/w",
> 'A' <repeats 15 times>..., bufSize=2077) at
> /home/ajr/Squeak-3.9-7/platforms/unix/plugins/SocketPlugin/ 
> sqUnixSocket.c:1067
> #2  0x080e661c in primitiveSocketSendDataBufCount ()
>    at /home/ajr/Squeak-3.9-7/platforms/unix/src/vm/intplugins/ 
> SocketPlugin/SocketPlugin.c:1046
> #3  0x0805bb77 in dispatchFunctionPointer (aFunctionPointer=0x80e64a0)
>    at /home/ajr/Squeak-3.9-7/platforms/unix/src/vm/interp.c:3949
> #4  0x08064305 in primitiveExternalCall () at
> /home/ajr/Squeak-3.9-7/platforms/unix/src/vm/interp.c:14208
> #5  0x0805bb77 in dispatchFunctionPointer (aFunctionPointer=0x8064230)
>    at /home/ajr/Squeak-3.9-7/platforms/unix/src/vm/interp.c:3949
> #6  0x0806d796 in interpret () at
> /home/ajr/Squeak-3.9-7/platforms/unix/src/vm/interp.c:7756
> #7  0x0805a5c9 in main (argc=1953394499, argv=0x0, envp=0x65707954)
>    at /home/ajr/Squeak-3.9-7/platforms/unix/vm/sqUnixMain.c:1388
>

--
======================================================================== 
===
John M. McIntosh <johnmci at smalltalkconsulting.com>
Corporate Smalltalk Consulting Ltd.  http://www.smalltalkconsulting.com
======================================================================== 
===