Hmmm...how about that? Yeah, it doesn't work with the devel trunk either - I'd missed that point.
No idea why, I'm afraid - never tried it before. Are you sure it "crashes"? I'm still getting a child status of "0", but no message output. My guess is that the I/O is being lost for some reason. On Feb 21, 2013, at 4:09 PM, Geoffrey Irving <irv...@naml.us> wrote: > 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 > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users
