[jianglai@ifarml1 ~ #64]$ gdb rootn.exe
GNU gdb 5.2.1
Copyright 2002 Free Software Foundation, Inc.
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This GDB was configured as "i686-pc-linux-gnu"...
(gdb) run
Starting program: /w/work1802/gzero/jianglai/ROOT/root/bin/rootn.exe 
[New Thread 1024 (LWP 9025)]
  *******************************************
  *                                         *
  *        W E L C O M E  to  R O O T       *
  *                                         *
  *   Version   3.05/07  17 November 2003   *
  *                                         *
  *  You are welcome to visit our Web site  *
  *          http://root.cern.ch            *
  *                                         *
  *******************************************

Compiled for linux with thread support.

CINT/ROOT C/C++ Interpreter version 5.15.94, June 30 2003
Type ? for help. Commands must be C++ statements.
Enclose multiple statements between { }.

Welcome to the ROOT tutorials


Type ".x demos.C" to get a toolbar from which to execute the demos

Type ".x demoshelp.C" to see the help window

root [0] .x hprod.cxx
Memory mapped file:   hsimple.map
Title:                Demo memory mapped file with histograms
Option:               CREATE
Mapped Memory region: 0x4125c000 - 0x41275000 (0.10 MB)
Current breakval:     0x41264000
Object               Class                Size      
hpx                  TH1F                 1024      

Program received signal SIGINT, Interrupt.
[Switching to Thread 1024 (LWP 7029)]
0x413f9b8e in __select () at __select:-1
-1	__select: No such file or directory.
	in __select
(gdb) bt
#0  0x413f9b8e in __select () at __select:-1
#1  0x405c88ac in __DTOR_END__ ()
   from /work/hallc/gzero/jianglai/ROOT/root/lib/libCore.so
#2  0x402ec6d8 in G__G__Base2_87_4_3(G__value*, char const*, G__param*, int) ()
   from /work/hallc/gzero/jianglai/ROOT/root/lib/libCore.so
#3  0x4072de29 in G__exec_asm ()
   from /work/hallc/gzero/jianglai/ROOT/root/lib/libCint.so
#4  0x407205b5 in G__exec_loop ()
   from /work/hallc/gzero/jianglai/ROOT/root/lib/libCint.so
#5  0x407207f7 in G__exec_while ()
   from /work/hallc/gzero/jianglai/ROOT/root/lib/libCint.so
#6  0x40722f7d in G__exec_statement ()
   from /work/hallc/gzero/jianglai/ROOT/root/lib/libCint.so
#7  0x406ae970 in G__exec_tempfile_core ()
   from /work/hallc/gzero/jianglai/ROOT/root/lib/libCint.so
#8  0x406aebe4 in G__exec_tempfile ()
   from /work/hallc/gzero/jianglai/ROOT/root/lib/libCint.so
#9  0x4072b9dc in G__process_cmd ()
   from /work/hallc/gzero/jianglai/ROOT/root/lib/libCint.so
#10 0x401a8430 in TCint::ProcessLine(char const*, TInterpreter::EErrorCode*) ()
   from /work/hallc/gzero/jianglai/ROOT/root/lib/libCore.so
#11 0x401a8533 in TCint::ProcessLineSynch(char const*, TInterpreter::EErrorCode*) () from /work/hallc/gzero/jianglai/ROOT/root/lib/libCore.so
#12 0x4012d0f8 in TApplication::ProcessFile(char const*, int*) ()
   from /work/hallc/gzero/jianglai/ROOT/root/lib/libCore.so
#13 0x4012c897 in TApplication::ProcessLine(char const*, bool, int*) ()
   from /work/hallc/gzero/jianglai/ROOT/root/lib/libCore.so
#14 0x41241622 in TRint::HandleTermInput() ()
   from /work/hallc/gzero/jianglai/ROOT/root/lib/libRint.so
#15 0x41240405 in TTermInputHandler::Notify() ()
   from /work/hallc/gzero/jianglai/ROOT/root/lib/libRint.so
#16 0x41264e3a in TTermInputHandler::ReadNotify() ()
    at /u/apps/gcc/3.2.3/BUILD/libstdc++-v3/src/stdexcept.cc:76
#17 0x401fcf99 in TUnixSystem::CheckDescriptors() ()
---Type <return> to continue, or q <return> to quit---