On Wed, 2016-06-22 at 03:01 -0400, Frediano Ziglio wrote:
> >
> >
> > Hi,
> >
> > On Mon, 2016-06-20 at 10:15 +0100, Frediano Ziglio wrote:
> > > Avoid multiple initializations of this library.
> > imo would be nice to mention that it is about threads
> > >
>
> What about
>
>
> Avoid multiple initializations of this library.
> Also initialize using thread safe code to avoid possible race conditions.
>
Yes, thank you
Pavel
>
> In theory one could allocate and use different SpiceServer structures
> so it's not only a thread issue. It's a pity that in 2016 a library
> is not able to initialize itself properly in a thread safe way.
> I don't know if LibreSSL fixed this.
>
> Frediano
>
> > > Signed-off-by: Frediano Ziglio <fziglio@xxxxxxxxxx>
> > > ---
> > > server/reds.c | 16 ++++++++++++----
> > > 1 file changed, 12 insertions(+), 4 deletions(-)
> > >
> > > diff --git a/server/reds.c b/server/reds.c
> > > index 0445623..c139d8d 100644
> > > --- a/server/reds.c
> > > +++ b/server/reds.c
> > > @@ -2801,8 +2801,19 @@ static void openssl_thread_setup(void)
> > > CRYPTO_set_locking_callback(pthreads_locking_callback);
> > > }
> > >
> > > +static gpointer openssl_global_init(gpointer arg)
> > the parameter can be marked as G_GNUC_UNUSED
> > > +{
> > > + SSL_library_init();
> > > + SSL_load_error_strings();
> > > +
> > > + openssl_thread_setup();
> > > +
> > > + return NULL;
> > > +}
> > > +
> > > static int reds_init_ssl(RedsState *reds)
> > > {
> > > + static GOnce openssl_once = G_ONCE_INIT;
> > > #if OPENSSL_VERSION_NUMBER >= 0x10000000L
> > > const SSL_METHOD *ssl_method;
> > > #else
> > > @@ -2814,8 +2825,7 @@ static int reds_init_ssl(RedsState *reds)
> > > long ssl_options = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3;
> > >
> > > /* Global system initialization*/
> > > - SSL_library_init();
> > > - SSL_load_error_strings();
> > > + g_once (&openssl_once, openssl_global_init, NULL);
> > extra space ^
> > >
> > > /* Create our context*/
> > > /* SSLv23_method() handles TLSv1.x in addition to SSLv2/v3 */
> > > @@ -2879,8 +2889,6 @@ static int reds_init_ssl(RedsState *reds)
> > > }
> > > }
> > >
> > > - openssl_thread_setup();
> > > -
> > > #ifndef SSL_OP_NO_COMPRESSION
> > > STACK *cmp_stack = SSL_COMP_get_compression_methods();
> > > sk_zero(cmp_stack);
> >
> > besides that ack,
> > Pavel
> >
> >
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