Thank you, Steven. That little change saved my day. It seems to have fixed the crash problem.
Regards, Jim --- Steven Reddie <[EMAIL PROTECTED]> wrote: > Have you used the following functions to register > OpenSSL thread-safety > callbacks: > > CRYPTO_set_locking_callback(locking_function); > CRYPTO_set_id_callback(id_function); > > You need to supply your own locking_function() and > id_function(), samples of > which can be found in OpenSSL's mt/mttest.c, > crypto/threads/mttest.c and > crypto/threads/th-lock.c. > > Regards, > > Steven > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf > Of Jim Wang > Sent: Thursday, 25 September 2003 8:31 AM > To: [EMAIL PROTECTED] > Subject: OpenSSL Thread-safe Issue ? > > > Hi, > > I have a server program using OpenSSL. It works well > most of the time. However, when multiple clients > connect to the server simultaneously, the server > sometimes crashes with an access violation in the > following code: > > /* locked by SSL_CTX in the calling function */ > static void SSL_SESSION_list_remove(SSL_CTX *ctx, > SSL_SESSION *s) > { > if ((s->next == NULL) || (s->prev == NULL)) return; > > if (s->next == (SSL_SESSION > *)&(ctx->session_cache_tail)) > { /* last element in list */ > if (s->prev == (SSL_SESSION > *)&(ctx->session_cache_head)) > { /* only one element in list */ > ctx->session_cache_head=NULL; > ctx->session_cache_tail=NULL; > } > else > { > ctx->session_cache_tail=s->prev; > s->prev->next=(SSL_SESSION > *)&(ctx->session_cache_tail); > } > } > else > { > if (s->prev == (SSL_SESSION > *)&(ctx->session_cache_head)) > { /* first element in list */ > ctx->session_cache_head=s->next; > s->next->prev=(SSL_SESSION > *)&(ctx->session_cache_head); > } > else > { /* middle of list */ > at this line----> s->next->prev=s->prev; > s->prev->next=s->next; > } > } > s->prev=s->next=NULL; > } > > > I built the OpenSSL libraries as multi-threaded, and > in the server, I have a global SSL context, and > service each OpenSSL request by a separate thread. I > am wondering if I need to lock any global data in > order to handle many concurrent requests. The crash > appears to be thread-safty related. > > Thank you, and your help is greatly appreciated ! > > Jim > > ______________________________________________________________________ > OpenSSL Project > http://www.openssl.org > User Support Mailing List > [EMAIL PROTECTED] > Automated List Manager [EMAIL PROTECTED] __________________________________ Do you Yahoo!? The New Yahoo! Shopping - with improved product search http://shopping.yahoo.com ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List [EMAIL PROTECTED] Automated List Manager [EMAIL PROTECTED]
