On Wed, 2004-12-01 at 13:17 -0500, Jim Shepherd wrote:
> received the same results. Here is the debug info:
>
> gdb /usr/bin/mpic++
> GNU gdb Red Hat Linux (6.1post-1.20040607.43rh)
> Copyright 2004 Free Software Foundation, Inc.
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> are
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> This GDB was configured as "i386-redhat-linux-gnu"...Using host
> libthread_db library "/lib/tls/libthread_db.so.1".
>
> (gdb) run
> Starting program: /usr/bin/mpic++
> [Thread debugging using libthread_db enabled]
> [New Thread -151066944 (LWP 22953)]
>
> Program received signal SIGSEGV, Segmentation fault.
> [Switching to Thread -151066944 (LWP 22953)]
> 0x0804ea6c in lam_wrap_split (str=@0xfefff594, c=32 ' ',
> out=@0xfefff698) at wrap_cxx.cc:512
> 512 while (i < size && str[i] == c)
> (gdb) where
> #0 0x0804ea6c in lam_wrap_split (str=@0xfefff594, c=32 ' ',
> out=@0xfefff698) at wrap_cxx.cc:512
> #1 0x0804c2ea in lam_wrap_get_compiler (env_list=@0xfefff7e8,
> default_comp=@0xfefff818, out=@0xfefff698)
> at wrap_cxx.cc:165
> #2 0x0804f778 in lam_wrap_engine (argc=1, argv=0xfefff944,
> env_vars=@0xfefff7e8, default_compiler=@0xfefff818,
> want_cxx_includes=true, want_cxx_libs=true, want_f77_includes=false,
> extra_args=@0xfefff820)
> at wrap_engine_cxx.cc:68
> #3 0x08049fa9 in main (argc=1, argv=0xfefff944) at mpicxx.cc:42
> #4 0x001d8e33 in __libc_start_main () from /lib/tls/libc.so.6
> #5 0x08049b0d in _start ()
> (gdb)
>
I set a breakpoint at the function where the segmentation fault occurs
and stepped through it until the segmentation fault. Here is the
output:
(gdb) run
The program being debugged has been started already.
Start it from the beginning? (y or n) y
Starting program: /usr/bin/mpic++
[Thread debugging using libthread_db enabled]
[New Thread -151066944 (LWP 22990)]
[Switching to Thread -151066944 (LWP 22990)]
Breakpoint 1, lam_wrap_split (str=@0xfefff594, c=32 ' ',
out=@0xfefff698) at wrap_cxx.cc:493
493 int start, i(0), size(str.size());
(gdb) step
494 out.clear();
(gdb) step
0x0804ac4a in std::vector<std::string, std::allocator<std::string>
>::clear (this=0xfefff698) at stl_vector.h:701
701 clear() { erase(begin(), end()); }
(gdb) step
0x0804a9d2 in std::vector<std::string, std::allocator<std::string>
>::begin (this=0xfefff698) at stl_vector.h:314
314 begin() { return iterator (this->_M_impl._M_start); }
(gdb) step
Program received signal SIGSEGV, Segmentation fault.
0x0804b169 in
_ZN9__gnu_cxx17__normal_iteratorIPSsSt6vectorISsSaISsEEEC9ERKS1_
(this=0xfefff4cc, __i=@0x1)
at stl_iterator.h:603
603 __normal_iterator(const _Iterator& __i) : _M_current(__i)
{ }
(gdb)
Hope this helps.
-Jim
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