Re: [xml] libxml2 and pthreads

[Ben Greear <greearb candelatech com>]

Daniel Veillard wrote:

>  No. The dependancy is embedded in the shared library. The applications
> don't need to be recompiled to go from RH9 to FC2, so the ABI *was*
> preserved. The API was preserved too because no application needed to
> change their code either assuming they do what they are supposed to do 
> which is to call xmlInitParser() after checking the version (c.f. the
> examples)

Ok, so maybe I don't understand the subtlties of API v/s ABI etc.  However,
my programs won't even compile unless I add -lpthreads.  I don't particularly
mind if such changes occur between major releases, and was in fact using this
as an argument for adding external locking API.

>  Your application crashes because you're calling fork() in a signal
> handler. The fact that it broke is not related to libxml2, but the 
> interraction of the pthread memory allocator (my guess) and doing that
> very silly thing.

Yes, it is a deadlock in the pthread at_fork handler code.  It may or may not
be a bug in my use of fork().  Regardless, I am never happy seeing a pthread
backtrace when debugging my otherwise single threaded app :)

--
Ben Greear <greearb candelatech com>
Candela Technologies Inc  http://www.candelatech.com