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From Jeff Trawick <traw...@gmail.com>
Subject Re: mod_fcgid does not appear to bound max processes
Date Fri, 29 Oct 2010 10:25:25 GMT
On Thu, Oct 28, 2010 at 9:07 PM, Edward Z. Yang <ezyang@mit.edu> wrote:
> Hello,
>
> Latest trunk segfaults for us.
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x00007f37938786f8 in pm_main () from /etc/httpd/modules/mod_fcgid.so
> (gdb) gcore /root/core.fcgid
> Saved corefile /root/core.fcgid
> (gdb) bt
> #0  0x00007f37938786f8 in pm_main () from /etc/httpd/modules/mod_fcgid.so
> #1  0x00007f379387a072 in procmgr_post_config () from /etc/httpd/modules/mod_fcgid.so
> #2  0x00007f3793873f7a in ?? () from /etc/httpd/modules/mod_fcgid.so
> #3  0x00007f379c8e7f09 in ap_run_post_config ()
> #4  0x00007f379c8d4267 in main ()

There's not much in pm_main(); perhaps some inlining is occurring?  I
see some code there that is dependent on addressability of the
server_rec in the fcgid daemon, which of course blows when server_rec
is created on the fly.  (This is unrelated to picking the right
process.)  We're getting further.

I have a patch to handle this additional case.  It is running fine
with my usual tests, but I'll try to create a simple module that makes
a copy of the server_rec for every request and run tests with that.

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