Actually, I don't see it printing "We're an MPI program!" under gdb, which means it isn't working.
Geoffrey On Thu, Feb 21, 2013 at 4:07 PM, Ralph Castain <r...@open-mpi.org> wrote: > Hmmm...works with 1.6.4 for me on Mac 10.8.2: > > Ralphs-iMac:v1.6 rhc$ ./fork-bug > We're an MPI program! > child status = 0 > Ralphs-iMac:v1.6 rhc$ gdb ./fork-bug > GNU gdb 6.3.50-20050815 (Apple version gdb-1820) (Sat Jun 16 02:40:11 UTC > 2012) > Copyright 2004 Free Software Foundation, Inc. > GDB is free software, covered by the GNU General Public License, and you are > welcome to change it and/or distribute copies of it under certain 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 "x86_64-apple-darwin"...Reading symbols for shared > libraries ... done > > (gdb) r > Starting program: /Volumes/RHCHD/rhc/openmpi/v1.6/fork-bug > Reading symbols for shared libraries ++............................. done > child status = 0 > > Program exited normally. > (gdb) > > Afraid I have no idea why you might be hitting the problem, though... > > > On Feb 21, 2013, at 3:50 PM, Geoffrey Irving <irv...@naml.us> wrote: > >> The singleton fork/exec itself is fine, since normal MPI programs work >> under gdb (e.g., fork-bug.c without the fork). gdb is has >> follow-fork-mode set to parent, so it's odd that gdb is looking at the >> child process's trickery at all. >> >> I've confirmed that it's still broken under 1.6.4, unfortunately. >> >> Geoffrey >> >> On Thu, Feb 21, 2013 at 3:36 PM, Ralph Castain <r...@open-mpi.org> wrote: >>> Singletons fork/exec a daemon to support them - my guess is that gdb may >>> not like it on your machine? >>> >>> FWIW - it runs fine for me using the developer's trunk. You might try with >>> 1.6.4 in case it's a bug in 1.6.0 >>> >>> >>> On Feb 21, 2013, at 3:18 PM, Geoffrey Irving <irv...@naml.us> wrote: >>> >>>> The attached program illustrates the problem. It forks, and the child >>>> calls MPI_Init. This works fine unless I'm inside gdb. Inside gdb, >>>> MPI_Init silently crashes. >>>> >>>> I'm using OpenMPI 1.6.0 on Mac 10.8.2. I'm running the program >>>> directly, not through mpirun. >>>> >>>> Any ideas what might be wrong? >>>> >>>> Thanks, >>>> Geoffrey >>>> >>>> cone:scratch% /usr/local/bin/mpicc -o fork-bug fork-bug.c >>>> cone:scratch% ./fork-bug >>>> We're an MPI program! >>>> child status = 0 >>>> cone:scratch% gdb ./fork-bug >>>> gdb ./fork-bug >>>> GNU gdb 6.3.50-20050815 (Apple version gdb-1824) (Thu Nov 15 10:42:43 UTC >>>> 2012) >>>> Copyright 2004 Free Software Foundation, Inc. >>>> GDB is free software, covered by the GNU General Public License, and you >>>> are >>>> welcome to change it and/or distribute copies of it under certain >>>> 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 "x86_64-apple-darwin"...Reading symbols for >>>> shared libraries ... done >>>> >>>> (gdb) run >>>> Reading symbols for shared libraries ++............................. done >>>> child status = 5 >>>> >>>> Program exited normally. >>>> (gdb) cone:scratch% >>>> <fork-bug.c>_______________________________________________ >>>> users mailing list >>>> us...@open-mpi.org >>>> http://www.open-mpi.org/mailman/listinfo.cgi/users >>> >>> >>> _______________________________________________ >>> users mailing list >>> us...@open-mpi.org >>> http://www.open-mpi.org/mailman/listinfo.cgi/users >> _______________________________________________ >> users mailing list >> us...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/users > > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users
