Thanks Mark!
Prior to this change, if you used userspace dtrace enough, eventually
you would get a spurious SIGTRAP on a process, which has the default
behavior of dumping core. Perhaps understandably, people balk at
random core files lying around. Or at dtrace killing their programs.
This
Author: markj
Date: Thu Feb 21 22:54:17 2019
New Revision: 344452
URL: https://svnweb.freebsd.org/changeset/base/344452
Log:
Fix a tracepoint lookup race in fasttrap_pid_probe().
fasttrap hooks the userspace breakpoint handler; the hook looks up the
breakpoint address in a hash table of
