To see the problem in Jack, this example from the Jack project can do it: https://github.com/jackaudio/example-clients/blob/master/simple_client.c
Just add the "static __thread anything[8 * 1048576]" to it and previously-working code begins doing this instead: Cannot create thread res = 22 JackMessageBuffer::Create cannot start thread Cannot create message buffer Cannot create thread res = 22 Cannot start Jack client listener Cannot start channel JackShmReadWritePtr1::~JackShmReadWritePtr1 - Init not done for 4294967295, skipping unlock JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for 4294967295, skipping unlock JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for 4294967295, skipping unlock jack_client_open() failed, status = 0x21 At least on my system, to get that output, the size of the allocation must be at least 514025 bytes. Using one byte less, it successfully connects, but then segfaults later in a call to jack_activate(); -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1757517 Title: An unused thread-local memory allocation can cause library calls to segfault. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1757517/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
