[parisc-linux] Feature request for parsic kernel hackers (2 mini-projects)

[parisc-linux] Feature request for parsic kernel hackers (2 mini-projects)

[Carlos O'Donell]

parisc,

I have two small kernel hacker projects.

1. Add cr27 printing to HPMC, this would let someone debug
   multi-threaded problems by examining the thread register.
   It would be even cooler to make this NPTL aware and dump
   the TCB and DTV.

2. Add some option that enables the user to print something
   like /proc/self/maps when a user process dies. This is 
   very usefull for translating a fault address into a quick
   estimate of which library function crashed.

Fame and glory? My gratitude? :)

Cheers,
Carlos.
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Re: [parisc-linux] Feature request for parsic kernel hackers (2 mini-projects)

[Randolph Chung]

> 2. Add some option that enables the user to print something
>    like /proc/self/maps when a user process dies. This is 
>    very usefull for translating a fault address into a quick
>    estimate of which library function crashed.

gdb?

randolph

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Re: [parisc-linux] Feature request for parsic kernel hackers (2 mini-projects)

[Carlos O'Donell]

On Mon, Aug 01, 2005 at 05:59:20PM +0800, Randolph Chung wrote:
> > 2. Add some option that enables the user to print something
> >    like /proc/self/maps when a user process dies. This is 
> >    very usefull for translating a fault address into a quick
> >    estimate of which library function crashed.
> 
> gdb?

If I can't reproduce the crash in the debugger? In particular the PA8800
crashes are so weird that I can't get the same thing under the debugger.

Also, when a process dies in gdb 6.x it throws away the process information
and I can't look at the maps anymore. I have to let it die, remember
where it died, start it again and then hope the DSO loading was
deterministic (e.g. No weird use of dlopen).

c.

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