site_archiver@lists.apple.com Delivered-To: darwin-dev@lists.apple.com Hi, If i compile and run the program below with gcc -Wall -Werror -O0 -g -o pjoin pjoin.c or gcc -Wall -Werror -O0 -g -m64 -o pjoin pjoin.c However, if i compile with gcc -Wall -Werror -O0 -g -arch ppc pjoin pjoin.c the seg.fault does not occur. best regards, Stefan /***** program pjoin.c: *****/ #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <sys/time.h> #include <pthread.h> pthread_t wth, cth; static void msg(const char* s) { fprintf(stderr, "%s\n", s); fflush(stderr); } static void imsg(const char* s, int i) { fprintf(stderr, "%s %i\n", s, i); fflush(stderr); } void* worker(void* data) { while (1) { usleep(random()%100); msg("worker exit"); pthread_exit(NULL); } return NULL; } void* canceller(void* data) { usleep(random()%100); msg("canceller"); int e = pthread_cancel(wth); /* thread 2 */ if (!e) msg("cancel ok"); else imsg("cancel not ok", e); pthread_exit(NULL); return NULL; } int main() { int e = 0; int i = 0; while (1) { ++i; usleep(1000); msg("----------------------------"); fprintf(stderr," %i \n", i); pthread_create(&wth, NULL, worker, NULL); pthread_create(&cth, NULL, canceller, NULL); msg("about to join wth"); e = pthread_join(wth, NULL); imsg("join worker: ", e); msg("about to join cth"); pthread_join(cth, NULL); /* thread 1 */ imsg("joing canceller: ", e); } return 0; } _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.appl... I have a question regarding the pthread library. I already posted this question to the mt-smp mailing list, but it might have been the wrong list. Sorry for double-posting this question, if you are subscribed to both lists. I noticed that sometimes a pthread_cancel causes a segmentation fault if I try to cancel a thread that has been joined before. However, this behavior depends on the time passed between pthread_cancel and pthread_join. I get a segmentation fault after a couple of seconds. The gdb tells me, the seg.fault happens somewhere in ___spin_lock. I wonder if I misread the standard specifiying the pthread library, or if I ran into some other problem. The output of ` uname -pmrsv`: Darwin 9.6.0 Darwin Kernel Version 9.6.0: Mon Nov 24 17:37:00 PST 2008; root:xnu-1228.9.59~1/RELEASE_I386 i386 i386 This email sent to site_archiver@lists.apple.com