Crash in initstate_r()

Zeno McDohl · 01-27-2006, 07:39 PM

I'm trying to run Phantasia4 under Slackware. It compiled fine, but when I try to run it, it crashes.

Running under gdb, it seems to crash in /lib/libc.so.6 in the function initstate_r() which is not part of the source. Anyone know why it's crashing? I don't know where else to ask.

In the source, this is the line that calls initstate_r:

Code:

   /* seed the random number generator */
    initstate_r (time(NULL), (char *)&randomStateBuffer, STATELEN,
       (struct random_data *)&randData);

But the actual crash is in initstate_r...

Zeno McDohl · 01-28-2006, 06:53 AM

Could someone move this to the Slackware section? I believe this is a bug in Slackware, based on searches for initstate_r such as this result:
http://www.mail-archive.com/debian-g.../msg27848.html

dunric · 01-29-2006, 01:20 PM

How do you know it's bug in glibc ?! With which error/signal it crashes ? It may be a bug in mentioned application. Slackware's glibc is built with only a few patches just fixing known bugs. I even tried to create a small app using initstate glibc function and it worked without problems. Maybe Phantasia calls it with wrong parameters f.E. with uninitialized pointer or improper field size. You didn't gave enough informations to determine the source of the problem.

Zeno McDohl · 01-29-2006, 01:29 PM

Well considering it tells me nothing when it crashes in initstate_r (I can't even list in gdb when in the function), it doesn't seem normal. Also it works fine on RedHat.

The signal is SIGSEGV.

How do I find out what the parameters are? There is no man for initstate_r.

dunric · 01-29-2006, 03:22 PM

initstate_r is just a reentrant version of initstate.
SIGSEGV is raised by invalid memory reference.
Just for curiosity, what glibc version are you running on ? Quick search on google revealed some older versions of glibc may contained bug in this function.

Zeno McDohl · 01-29-2006, 03:46 PM

I'm using version 2.3.5, and as for initstate it doesn't match the parameters that initstate_r has... (so says the manual)

It must be the version I have is bugged? But I just downloaded Slackware days ago, yet it didn't include a new version of glibc?

dunric · 01-29-2006, 05:05 PM

I've make a short test and although my initstate_r has passed I can confirm phantasia server crashes with segment violation. I've no spare time now to do a deeper research but if it's no problem for you, upgrade your box to Slackware-current and it should work (glibc 2.3.6, gcc 3.4.5) - atleast it worked for me.

Zeno McDohl · 01-30-2006, 06:57 AM

*nod* I was updating yesterday, but ran into a problem and can't seen to update...

Zeno McDohl · 01-31-2006, 08:53 PM

Well I replaced all the _r functions (srandom_r, etc) with the normal version (srandom etc) and I got it running. If anyone could still tell me why it was crashing in the _r versions, that'd be great.