[Python-Dev] OpenSSL thread safety when reading files?

[Bill Janssen]

> I'm seeing a number of malloc (actully, free) errors, now that I'm
> pounding on the OpenSSL server/client setup with lots of server
> threads and client threads.  They all look like either

The issue seems to be that we assume OpenSSL is thread-safe (that is,
we call Py_BEGIN_ALLOW_THREADS / Py_END_ALLOW_THREADS), but the _ssl.c
code never did what was necessary to support that assumption.  See
http://www.openssl.org/docs/crypto/threads.html#DESCRIPTION.

My analysis is that we need to add lock and unlock functions to the
OpenSSL initialization code we currently use, which looks like this:

	/* Init OpenSSL */
	SSL_load_error_strings();
	SSLeay_add_ssl_algorithms();

Or, just not allow threads, which seems wrong.

Bill