Re: reg: GDB's generate-core-file option

[Hui Zhu <teawater at gmail dot com>]

" (No space left on device)"

I think this is the reason.

Thanks,
Hui

On Tue, Sep 29, 2009 at 10:09, Aarthy <aarthy82@gmail.com> wrote:
> Hi there,
>
> I am currently working on a product which has many processes running
> in a multi threaded fashion. I run my product on a device which has
> 200 MB of hard disk space to write the core file. It doesn't have any
> swap memory as such. My requirement is that I need to collect the
> snapshot of each process at a particular time. So I used
> generate-core-file option after attaching each process to GDB. The
> problem is that for one process i get the following error.
>
> warning: Failed to write corefile contents (No space left on device).
> ../../gdb/utils.c:1058: internal-error: virtual memory exhausted:
> can't allocate 92123136 bytes.
> A problem internal to GDB has been detected,
> further debugging may prove unreliable.
>
> I would like to know what could be the reason. I have about 15
> processes running. everything except this process i was able to
> generate the forced core file.
> This is my ulimit -a output,
>
> Linux(debug)# ulimit -a
> core file size ? ? ? ?(blocks, -c) 73242
> data seg size ? ? ? ? (kbytes, -d) 62500
> file size ? ? ? ? ? ? (blocks, -f) unlimited
> max locked memory ? ? (kbytes, -l) unlimited
> max memory size ? ? ? (kbytes, -m) unlimited
> open files ? ? ? ? ? ? ? ? ? ?(-n) 1024
> pipe size ? ? ? ? ?(512 bytes, -p) 8
> stack size ? ? ? ? ? ?(kbytes, -s) unlimited
> cpu time ? ? ? ? ? ? (seconds, -t) unlimited
> max user processes ? ? ? ? ? ?(-u) 26624
> virtual memory ? ? ? ?(kbytes, -v) 125000
>
> If i change the virtual memory size to unlimited i was able to
> generate the core. Kindly let me know how exactly the
> generate-core-file works.
>
> Regards,
> Aarthy.
>