[Pkg-openmpi-maintainers] Bug#848574: openmpi: frequent segfault in linker on mips64el

[YunQiang Su]

On Sun, 18 Dec 2016 13:44:32 +0000 Ansgar Burchardt <ansgar at debian.org> wrote:
> Package: libopenmpi-dev
> Version: 2.0.2~git.20161225-8
> Severity: important
>
> [ CC'ed debian-mips@ as a segfault in the linker might not be a bug in MPI ]
>
> OpenMPI crashed frequenly in the runtime linker on mips64el, even for a
> trivial program calling just MPI_Init and MPI_Finalize:
>
> +---
> | #include <mpi.h>
> |
> | int main(int argc, char** argv)
> | {
> |   MPI_Init(&argc, &argv);
> |   MPI_Finalize();
> |   return 0;
> | }
> +---[ test.cc ]
>
> After building with `mpic++ -o test test.cc`, I often get the following
> backtrace from the core file:
>
> +---
> | Core was generated by `./test'.
> | Program terminated with signal SIGSEGV, Segmentation fault.
> | #0  elf_machine_runtime_link_map (gpreg=<optimized out>, stub_pc=1099310712688)
> |     at ../sysdeps/mips/dl-trampoline.c:84
> | 84 ../sysdeps/mips/dl-trampoline.c: No such file or directory.
> | [Current thread is 1 (LWP 2837)]
> | (gdb) bt
> | #0  elf_machine_runtime_link_map (gpreg=<optimized out>, stub_pc=1099310712688)
> |     at ../sysdeps/mips/dl-trampoline.c:84
> | #1  __dl_runtime_resolve (sym_index=151, return_address=<optimized out>, old_gpreg=<optimized out>,
> |     stub_pc=1099310712688) at ../sysdeps/mips/dl-trampoline.c:125
> | #2  0x000000fff5e341ac in _dl_runtime_resolve () from /lib64/ld.so.1
> | Backtrace stopped: frame did not save the PC
> +---[ backtrace from `gdb ./test core` ]

It is quite strange that it won't fail if run with gdb.

>
> I noticed as src:dune-common/2.5.0-1 failed on mips64el even though the last
> upload build sucessfully.
>
> Ansgar
>
> -- System Information:
> Debian Release: stretch/sid
>   APT prefers unstable
>   APT policy: (500, 'unstable')
> Architecture: mips64el (mips64)
>
> Kernel: Linux 4.7.0-0.bpo.1-octeon (SMP w/4 CPU cores)
> Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)
> Shell: /bin/sh linked to /bin/dash
> Init: unable to detect
>
> Versions of packages libopenmpi-dev depends on:
> ii  libc6           2.24-8
> ii  libhwloc-dev    1.11.5-1
> ii  libhwloc5       1.11.5-1
> ii  libibverbs-dev  1.2.1-2