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Zdenek-

Yes, this is a known problem. I sent out a patch last month that
fixed this problem. Unfortunately, the patch caused some kernel
hangs that I just fixed today. I'm testing the fix now so expect
a new patch either this afternoon or tomorrow that will fix this.

On Wed, May 02, 2001 at 08:53:00PM +0000, Zdenek Kabelac wrote:
> Hello
>
> Looks to me like the latest 2.4.5-pre1 is not creating
> coredump for multithreaded aplications:
>
> ----
> $ ulimit -a
> core file size (blocks) unlimited
> data seg size (kbytes) unlimited
> file size (blocks) unlimited
> max locked memory (kbytes) unlimited
> max memory size (kbytes) unlimited
> open files 1024
> pipe size (512 bytes) 8
> stack size (kbytes) 8192
> cpu time (seconds) unlimited
> max user processes 6144
> virtual memory (kbytes) unlimited
>
> $ ./testcore
> Segmentation fault
>
>
> --- test program --
>
> #include <stdio.h>
> #include <pthread.h>
>
> #define TASKS 10
>
> void* thread(void* arg)
> {
> printf("yuk %s\n", 0xffff0000);
> return 0;
> }
>
> int main(int argc, char *argv[])
> {
> pthread_t task[TASKS];
> void* ret;
> int i = 0;
> for(i = 0; i < TASKS; i++)
> pthread_create(&task[i], NULL, thread, 0);
> for(i = 0; i < TASKS; i++)
> pthread_join(task[i], &ret);
>
> return 0;
> }
> ---
>
>
> for single threadad apps there is no problem:
> (just put printf after int i declaration)
> $ ./testcore
> Segmentation fault (core dumped)
>
> ---
>
> Am I doing something wrong ???
>
> Also for quite a long time Alan's AC patches were efictively locking
> my machine when threaded application was crashing - resolvin
> almost original behaviour solved this problem - but I like
> per-thread coredump - is there any special reason why this is still
> not present in the current 2.4.4 kernel as I can see this as quite
> usefull.
>
>
> bye
>
>
> kabi@i.am
>
> -
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--
Don Dugger
"Censeo Toto nos in Kansa esse decisse." - D. Gale
n0ano@valinux.com
Ph: 303/938-9838
-
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