(Tried to open a bug, but I don't seem to have access...)
Environment:
Fedora Core 5 (actually I think any Linux will do)
OMPI 1.2b1 (./configure --with-devel-headers)
Symptom:
MPI_Init(&argc, &argv) corrupts the argc variable.
Repeat By:
1. Compile the following program using 'mpicc -g -o mpitest mpitest.c':
#include <mpi.h>
int main(int argc, char *argv[])
{
MPI_Init(&argc, &argv);
MPI_Finalize();
}
2. See corruption under gdb:
$ gdb mpitest
GNU gdb 6.5
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and
you are
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conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for
details.
This GDB was configured as "i686-pc-linux-gnu"...Using host
libthread_db library
"/lib/libthread_db.so.1".
(gdb) b main
Breakpoint 1 at 0x80485c5: file mpitest.c, line 6.
(gdb) r
Starting program: /home/greg/mpitest
[Thread debugging using libthread_db enabled]
[New Thread -1208936784 (LWP 11171)]
[Switching to Thread -1208936784 (LWP 11171)]
Breakpoint 1, main (argc=1, argv=0xbf81fae4) at mpitest.c:6
6 MPI_Init(&argc, &argv);
(gdb) p argc
$1 = 1
(gdb) n
7 MPI_Finalize();
(gdb) p argc
Cannot access memory at address 0x0
(gdb)
