[Zope-dev] more on the segfault saga

[Leonardo Rochael Almeida]

I set MALLOC_CHECK_ to 1 and it said it was using the malloc debug
hooks, but didn't report anything else before the crashes, so no point
in setting it to 2...

On Wed, 2002-03-13 at 13:49, Shane Hathaway wrote:
> Leonardo Rochael Almeida wrote:
> > On Wed, 2002-03-13 at 13:04, Shane Hathaway wrote:
> > 
> >>I just found out about something that might help.  If you compiled 
> >>against the GNU C library, you can set the environment variable 
> >>MALLOC_CHECK_ to 1 to get malloc usage warnings printed to stderr, or 
> >>set it to 2 to cause an abort() as soon as an error is detected. 
> >>Assuming you're running in production, I'd start with 1 (making sure 
> >>stderr is connected to something), then if any warnings occur but they 
> >>aren't informative enough, switch to 2.
> >>
> >>I learned this here:
> >>
> >>http://www.gnu.org/manual/glibc-2.2.3/html_node/libc_32.html
> >>
> > 
> > Thanks Shane, I'll try that. But first I need a way to not supply -D and
> > still get the stderr redirected. This site uses cookie authentication
> > (exUserFolder) and even though the traceback ends up in a page that is
> > shortly redirected from, some of our client's customers can spot it
> > sometimes and they usually call complaining about "the Zope error they
> > saw imediatelly before the login page" so we had to disable '-D'.
> 
> -D is actually not related AFAIK.  The C library will output to stderr 
> regardless of whether -D is supplied, which means you need to use 
> standard redirection anyway, for example:
> 
> ./start >/var/local/log/zope_output 2>&1

-- 
Ideas don't stay in some minds very long because they don't like
solitary confinement.