Test case. Build with: gcc bug23844.wr.c -lpthread -o bug23844wr
** Attachment added: "bug23844.wr.c" https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1864864/+attachment/5333068/+files/bug23844.wr.c ** Description changed: [Impact] - * pthread_rwlock_trywrlock and pthread_rwlock_tryrdlock before glibc + * pthread_rwlock_trywrlock and pthread_rwlock_tryrdlock before glibc 2.30 could hang: https://sourceware.org/bugzilla/show_bug.cgi?id=23844#c14 - * We are especially able to reproduce the problem with BIND 9.16.x when + * We are especially able to reproduce the problem with BIND 9.16.x when --with-pthread-rwlock configure option enabled - * But the impact is not limited to BIND 9.16, but any multithreaded + * But the impact is not limited to BIND 9.16, but any multithreaded application using phtread rwlocks [Test Case] - * There's three test cases included in the upstream bugzilla + * Fetch the source program and build it: + $ wget https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1864864/+attachment/5333068/+files/bug23844.wr.c + $ gcc bug23844.wr.c -lpthread -o bug23844wr + + * Run the resulting binary a few times. On affected systems, it should + hang in less then 10 attempts. + + $ ./bug23844rw + trylock_wr + 500000 + + (...) + + $ ./bug23844.wr + trylock_wr + <hangs> [Regression Potential] - * I don't believe there's a chance for regressions here + * I don't believe there's a chance for regressions here -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1864864 Title: [SRU] pthread_rwlock_trywrlock results in hang To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1864864/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
