Thread safety problem (?)

Moritz Schulte mo at
Tue Apr 19 16:14:25 CEST 2005

On Mon, Apr 18, 2005 at 05:51:03PM +0200, Vincent Deffontaines wrote:

Hello Vincent,

> We experiment an occasionnal (hard to reproduce) crash which seems
> to always occur at the gnutls call : gnutls_handshake(). The crash
> is quite rare (and occurs in an often called loop), which leads us
> to believe this might be a thread safety problem.

Since your initialization in respect to the threading system looks
correct, there are two possibilities:

  1) the problem is indeed in Libgcrypt and thus you have found a new
  2) the problem is not in Libgcrypt.

I cannot exclude the one or the other.  You could try to do the
following: protect all calls into Libgcrypt by a shared lock; this
way, Libgcrypt would never be used by two threads at the same time.
If the problem keeps being reproducible, 1) should be excludable.


Moritz Schulte
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