Mark Johnston 4f1b715c84 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 tracepoints. It is possible for the tracepoint to be removed by a different thread in between the breakpoint trap and the hash table lookup, in which case SIGTRAP gets delivered to the target process. Fix the problem by adding a per-process generation counter that gets incremented when a tracepoint belonging to that process is removed. Then, when a lookup fails, the trapping instruction is restarted if the thread's counter doesn't match that of the process. Reviewed by: cem MFC after: 2 weeks Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D19273		2019-02-21 22:54:17 +00:00
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dtmalloc	dtrace: depessimize dtmalloc when dtrace is active	2018-04-24 01:06:20 +00:00
dtrace	Fix a tracepoint lookup race in fasttrap_pid_probe().	2019-02-21 22:54:17 +00:00
fbt	DTrace/powerpc: Fix FBT return probes	2018-11-21 16:47:11 +00:00
profile	Revert r326083, it doesn't behave as expected.	2018-06-03 03:53:11 +00:00
sdt	lockstat: track lockstat just like sdt probes	2018-04-24 01:04:10 +00:00
systrace	systrace: track it like sdt probes	2018-04-27 15:16:34 +00:00
prototype.c	Use C99 initializers for DTrace provider methods.	2017-09-27 17:46:38 +00:00