[mpich-devel] mpirun fails if there is a void environment variable

[Дмитрий]

Hello again,

env command output is like this

$ env

...
XDG_SESSION_PATH=/org/freedesktop/DisplayManager/Session0
=
DISTCC_SAVE_TEMPS=0
...



2016-02-18 20:05 GMT+03:00 Balaji, Pavan <balaji at anl.gov>:
>
> Does your environment not have anything in it?  What's the output of "env"?
>
>   -- Pavan
>
>> On Feb 18, 2016, at 9:08 AM, Дмитрий <dmitrodem at gmail.com> wrote:
>>
>> Hello,
>>
>> i've found that on my system mpirun /bin/hostname causes segmentation
>> fault. Inspecting it in gdb, i've seen the following stack trace:
>>
>> (gdb) run /bin/hostname
>> Starting program: /usr/bin/mpirun /bin/hostname
>> [Thread debugging using libthread_db enabled]
>> Using host libthread_db library "/lib64/libthread_db.so.1".
>>
>> Program received signal SIGSEGV, Segmentation fault.
>> 0x00007ffff69c484a in ?? () from /lib64/libc.so.6
>> (gdb) bt
>> #0  0x00007ffff69c484a in ?? () from /lib64/libc.so.6
>> #1  0x0000000000430455 in HYDTI_bscd_in_env_list (env_name=0x0,
>> env_list=env_list at entry=0x7fffffffd890) at
>> tools/bootstrap/external/external_common.c:27
>> #2  0x0000000000425ae4 in HYDT_bscd_ssh_query_env_inherit
>> (env_name=<optimized out>, ret=0x7fffffffd8e4) at
>> tools/bootstrap/external/ssh_env.c:17
>> #3  0x000000000042557c in HYDT_bsci_query_env_inherit
>> (env_name=<optimized out>, ret=ret at entry=0x7fffffffd8e4) at
>> tools/bootstrap/src/bsci_env.c:18
>> #4  0x00000000004208d3 in HYDU_list_inherited_env
>> (env_list=env_list at entry=0x66c680 <HYD_server_info+128>) at
>> utils/env/env.c:55
>> #5  0x000000000040404c in main (argc=<optimized out>, argv=<optimized
>> out>) at ui/mpich/mpiexec.c:258
>>
>> The problem seems to be in strcmp call, which compares NULL (empty
>> named environment variable) with something. env command shows string
>> "=" for me.
>>
>> So, I guess it would be nice to check env_name variable before passing
>> it to strcmp?
>>
>> --
>> Regards,
>>    Dmitriy
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-- 
Regards,
    Dmitriy