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Subject: [OMPI devel] MPI_Comm_create_group()
From: Lisandro Dalcin (dalcinl_at_[hidden])
Date: 2014-04-21 10:55:54


A very basic test for MPI_Comm_create_group() is failing for me. I'm
pasting the code, the failure, and output from valgrind.

[dalcinl_at_kw2060 openmpi]$ cat comm_create_group.c
#include <mpi.h>
int main(int argc, char *argv[])
{
  MPI_Group group;
  MPI_Comm comm;
  MPI_Init(&argc, &argv);
  MPI_Comm_group(MPI_COMM_WORLD, &group);
  MPI_Comm_create_group(MPI_COMM_WORLD, group, 0, &comm);
  MPI_Comm_free(&comm);
  MPI_Group_free(&group);
  MPI_Finalize();
  return 0;
}
[dalcinl_at_kw2060 openmpi]$ mpicc comm_create_group.c
[dalcinl_at_kw2060 openmpi]$ ./a.out
[kw2060:22673] *** An error occurred in MPI_Comm_create_group
[kw2060:22673] *** reported by process [140737483440129,140733193388032]
[kw2060:22673] *** on communicator MPI_COMM_WORLD
[kw2060:22673] *** MPI_ERR_UNKNOWN: unknown error
[kw2060:22673] *** MPI_ERRORS_ARE_FATAL (processes in this
communicator will now abort,
[kw2060:22673] *** and potentially your MPI job)

[dalcinl_at_kw2060 openmpi]$ valgrind -q ./a.out
==22675== Conditional jump or move depends on uninitialised value(s)
==22675== at 0x4C457D6: ompi_comm_nextcid (comm_cid.c:262)
==22675== by 0x4C42FA8: ompi_comm_create_group (comm.c:1109)
==22675== by 0x4C81E35: PMPI_Comm_create_group (pcomm_create_group.c:77)
==22675== by 0x4008FF: main (in /home/dalcinl/Devel/BUGS-MPI/openmpi/a.out)
==22675==
==22675== Conditional jump or move depends on uninitialised value(s)
==22675== at 0x4C42FB0: ompi_comm_create_group (comm.c:1116)
==22675== by 0x4C81E35: PMPI_Comm_create_group (pcomm_create_group.c:77)
==22675== by 0x4008FF: main (in /home/dalcinl/Devel/BUGS-MPI/openmpi/a.out)
==22675==
==22675== Conditional jump or move depends on uninitialised value(s)
==22675== at 0x4C81E46: PMPI_Comm_create_group (pcomm_create_group.c:79)
==22675== by 0x4008FF: main (in /home/dalcinl/Devel/BUGS-MPI/openmpi/a.out)
==22675==
==22675== Conditional jump or move depends on uninitialised value(s)
==22675== at 0x4C81BA0: ompi_errcode_get_mpi_code (errcode-internal.h:64)
==22675== by 0x4C81E51: PMPI_Comm_create_group (pcomm_create_group.c:79)
==22675== by 0x4008FF: main (in /home/dalcinl/Devel/BUGS-MPI/openmpi/a.out)
==22675==
==22675== Conditional jump or move depends on uninitialised value(s)
==22675== at 0x4C4AA14: opal_pointer_array_get_item
(opal_pointer_array.h:130)
==22675== by 0x4C4AA60: ompi_mpi_errnum_get_string (errcode.h:122)
==22675== by 0x4C4B0B4: backend_fatal_aggregate (errhandler_predefined.c:192)
==22675== by 0x4C4B657: backend_fatal (errhandler_predefined.c:334)
==22675== by 0x4C4AB7C: ompi_mpi_errors_are_fatal_comm_handler
(errhandler_predefined.c:69)
==22675== by 0x4C4A63E: ompi_errhandler_invoke (errhandler_invoke.c:53)
==22675== by 0x4C81E81: PMPI_Comm_create_group (pcomm_create_group.c:79)
==22675== by 0x4008FF: main (in /home/dalcinl/Devel/BUGS-MPI/openmpi/a.out)
==22675==
==22675== Use of uninitialised value of size 8
==22675== at 0x327BC47B9B: _itoa_word (in /usr/lib64/libc-2.18.so)
==22675== by 0x327BC48AD0: vfprintf (in /usr/lib64/libc-2.18.so)
==22675== by 0x327BC74D52: vasprintf (in /usr/lib64/libc-2.18.so)
==22675== by 0x52E6C4B: opal_show_help_vstring (show_help.c:309)
==22675== by 0x4FCFBB4: orte_show_help (show_help.c:591)
==22675== by 0x4C4B1B5: backend_fatal_aggregate (errhandler_predefined.c:201)
==22675== by 0x4C4B657: backend_fatal (errhandler_predefined.c:334)
==22675== by 0x4C4AB7C: ompi_mpi_errors_are_fatal_comm_handler
(errhandler_predefined.c:69)
==22675== by 0x4C4A63E: ompi_errhandler_invoke (errhandler_invoke.c:53)
==22675== by 0x4C81E81: PMPI_Comm_create_group (pcomm_create_group.c:79)
==22675== by 0x4008FF: main (in /home/dalcinl/Devel/BUGS-MPI/openmpi/a.out)
==22675==
==22675== Conditional jump or move depends on uninitialised value(s)
==22675== at 0x327BC47BA5: _itoa_word (in /usr/lib64/libc-2.18.so)
==22675== by 0x327BC48AD0: vfprintf (in /usr/lib64/libc-2.18.so)
==22675== by 0x327BC74D52: vasprintf (in /usr/lib64/libc-2.18.so)
==22675== by 0x52E6C4B: opal_show_help_vstring (show_help.c:309)
==22675== by 0x4FCFBB4: orte_show_help (show_help.c:591)
==22675== by 0x4C4B1B5: backend_fatal_aggregate (errhandler_predefined.c:201)
==22675== by 0x4C4B657: backend_fatal (errhandler_predefined.c:334)
==22675== by 0x4C4AB7C: ompi_mpi_errors_are_fatal_comm_handler
(errhandler_predefined.c:69)
==22675== by 0x4C4A63E: ompi_errhandler_invoke (errhandler_invoke.c:53)
==22675== by 0x4C81E81: PMPI_Comm_create_group (pcomm_create_group.c:79)
==22675== by 0x4008FF: main (in /home/dalcinl/Devel/BUGS-MPI/openmpi/a.out)
==22675==
==22675== Conditional jump or move depends on uninitialised value(s)
==22675== at 0x327BC48B18: vfprintf (in /usr/lib64/libc-2.18.so)
==22675== by 0x327BC74D52: vasprintf (in /usr/lib64/libc-2.18.so)
==22675== by 0x52E6C4B: opal_show_help_vstring (show_help.c:309)
==22675== by 0x4FCFBB4: orte_show_help (show_help.c:591)
==22675== by 0x4C4B1B5: backend_fatal_aggregate (errhandler_predefined.c:201)
==22675== by 0x4C4B657: backend_fatal (errhandler_predefined.c:334)
==22675== by 0x4C4AB7C: ompi_mpi_errors_are_fatal_comm_handler
(errhandler_predefined.c:69)
==22675== by 0x4C4A63E: ompi_errhandler_invoke (errhandler_invoke.c:53)
==22675== by 0x4C81E81: PMPI_Comm_create_group (pcomm_create_group.c:79)
==22675== by 0x4008FF: main (in /home/dalcinl/Devel/BUGS-MPI/openmpi/a.out)
==22675==
==22675== Conditional jump or move depends on uninitialised value(s)
==22675== at 0x327BC48737: vfprintf (in /usr/lib64/libc-2.18.so)
==22675== by 0x327BC74D52: vasprintf (in /usr/lib64/libc-2.18.so)
==22675== by 0x52E6C4B: opal_show_help_vstring (show_help.c:309)
==22675== by 0x4FCFBB4: orte_show_help (show_help.c:591)
==22675== by 0x4C4B1B5: backend_fatal_aggregate (errhandler_predefined.c:201)
==22675== by 0x4C4B657: backend_fatal (errhandler_predefined.c:334)
==22675== by 0x4C4AB7C: ompi_mpi_errors_are_fatal_comm_handler
(errhandler_predefined.c:69)
==22675== by 0x4C4A63E: ompi_errhandler_invoke (errhandler_invoke.c:53)
==22675== by 0x4C81E81: PMPI_Comm_create_group (pcomm_create_group.c:79)
==22675== by 0x4008FF: main (in /home/dalcinl/Devel/BUGS-MPI/openmpi/a.out)
==22675==
==22675== Conditional jump or move depends on uninitialised value(s)
==22675== at 0x327BC487B7: vfprintf (in /usr/lib64/libc-2.18.so)
==22675== by 0x327BC74D52: vasprintf (in /usr/lib64/libc-2.18.so)
==22675== by 0x52E6C4B: opal_show_help_vstring (show_help.c:309)
==22675== by 0x4FCFBB4: orte_show_help (show_help.c:591)
==22675== by 0x4C4B1B5: backend_fatal_aggregate (errhandler_predefined.c:201)
==22675== by 0x4C4B657: backend_fatal (errhandler_predefined.c:334)
==22675== by 0x4C4AB7C: ompi_mpi_errors_are_fatal_comm_handler
(errhandler_predefined.c:69)
==22675== by 0x4C4A63E: ompi_errhandler_invoke (errhandler_invoke.c:53)
==22675== by 0x4C81E81: PMPI_Comm_create_group (pcomm_create_group.c:79)
==22675== by 0x4008FF: main (in /home/dalcinl/Devel/BUGS-MPI/openmpi/a.out)
==22675==
[kw2060:22675] *** An error occurred in MPI_Comm_create_group
[kw2060:22675] *** reported by process [68714692609,0]
[kw2060:22675] *** on communicator MPI_COMM_WORLD
[kw2060:22675] *** Unknown error (this should not happen!)
[kw2060:22675] *** MPI_ERRORS_ARE_FATAL (processes in this
communicator will now abort,
[kw2060:22675] *** and potentially your MPI job)
==22675== Conditional jump or move depends on uninitialised value(s)
==22675== at 0x4C606BE: ompi_mpi_abort (ompi_mpi_abort.c:96)
==22675== by 0x4C4B6AA: backend_fatal (errhandler_predefined.c:346)
==22675== by 0x4C4AB7C: ompi_mpi_errors_are_fatal_comm_handler
(errhandler_predefined.c:69)
==22675== by 0x4C4A63E: ompi_errhandler_invoke (errhandler_invoke.c:53)
==22675== by 0x4C81E81: PMPI_Comm_create_group (pcomm_create_group.c:79)
==22675== by 0x4008FF: main (in /home/dalcinl/Devel/BUGS-MPI/openmpi/a.out)
==22675==
==22675== Conditional jump or move depends on uninitialised value(s)
==22675== at 0x4C60498: opal_pointer_array_get_item
(opal_pointer_array.h:130)
==22675== by 0x4C6052C: ompi_mpi_errnum_get_string (errcode.h:122)
==22675== by 0x4C606EA: ompi_mpi_abort (ompi_mpi_abort.c:97)
==22675== by 0x4C4B6AA: backend_fatal (errhandler_predefined.c:346)
==22675== by 0x4C4AB7C: ompi_mpi_errors_are_fatal_comm_handler
(errhandler_predefined.c:69)
==22675== by 0x4C4A63E: ompi_errhandler_invoke (errhandler_invoke.c:53)
==22675== by 0x4C81E81: PMPI_Comm_create_group (pcomm_create_group.c:79)
==22675== by 0x4008FF: main (in /home/dalcinl/Devel/BUGS-MPI/openmpi/a.out)
==22675==
==22675== Conditional jump or move depends on uninitialised value(s)
==22675== at 0x4CF5382: ompi_rte_abort (rte_orte_module.c:77)
==22675== by 0x4C60B04: ompi_mpi_abort (ompi_mpi_abort.c:203)
==22675== by 0x4C4B6AA: backend_fatal (errhandler_predefined.c:346)
==22675== by 0x4C4AB7C: ompi_mpi_errors_are_fatal_comm_handler
(errhandler_predefined.c:69)
==22675== by 0x4C4A63E: ompi_errhandler_invoke (errhandler_invoke.c:53)
==22675== by 0x4C81E81: PMPI_Comm_create_group (pcomm_create_group.c:79)
==22675== by 0x4008FF: main (in /home/dalcinl/Devel/BUGS-MPI/openmpi/a.out)
==22675==
==22675== Conditional jump or move depends on uninitialised value(s)
==22675== at 0x4CF538E: ompi_rte_abort (rte_orte_module.c:77)
==22675== by 0x4C60B04: ompi_mpi_abort (ompi_mpi_abort.c:203)
==22675== by 0x4C4B6AA: backend_fatal (errhandler_predefined.c:346)
==22675== by 0x4C4AB7C: ompi_mpi_errors_are_fatal_comm_handler
(errhandler_predefined.c:69)
==22675== by 0x4C4A63E: ompi_errhandler_invoke (errhandler_invoke.c:53)
==22675== by 0x4C81E81: PMPI_Comm_create_group (pcomm_create_group.c:79)
==22675== by 0x4008FF: main (in /home/dalcinl/Devel/BUGS-MPI/openmpi/a.out)
==22675==
==22675== Syscall param exit_group(status) contains uninitialised byte(s)
==22675== at 0x327BCBCCF9: _Exit (in /usr/lib64/libc-2.18.so)
==22675== by 0x327BC3948A: __run_exit_handlers (in /usr/lib64/libc-2.18.so)
==22675== by 0x327BC39514: exit (in /usr/lib64/libc-2.18.so)
==22675== by 0x4FEF419: orte_ess_base_app_abort (ess_base_std_app.c:450)
==22675== by 0x4CF53C5: ompi_rte_abort (rte_orte_module.c:81)
==22675== by 0x4C60B04: ompi_mpi_abort (ompi_mpi_abort.c:203)
==22675== by 0x4C4B6AA: backend_fatal (errhandler_predefined.c:346)
==22675== by 0x4C4AB7C: ompi_mpi_errors_are_fatal_comm_handler
(errhandler_predefined.c:69)
==22675== by 0x4C4A63E: ompi_errhandler_invoke (errhandler_invoke.c:53)
==22675== by 0x4C81E81: PMPI_Comm_create_group (pcomm_create_group.c:79)
==22675== by 0x4008FF: main (in /home/dalcinl/Devel/BUGS-MPI/openmpi/a.out)
==22675==

-- 
Lisandro Dalcin
---------------
CIMEC (UNL/CONICET)
Predio CONICET-Santa Fe
Colectora RN 168 Km 472, Paraje El Pozo
3000 Santa Fe, Argentina
Tel: +54-342-4511594 (ext 1016)
Tel/Fax: +54-342-4511169