Author: mjg
Date: Sat Dec 8 06:31:43 2018
New Revision: 341721
URL: https://svnweb.freebsd.org/changeset/base/341721
Log:
proc: handle sdt exit probe before taking the proc lock
Sponsored by: The FreeBSD Foundation
Modified:
head/sys/kern/kern_exit.c
Modified: head/sys/kern/kern_exit.c
==============================================================================
--- head/sys/kern/kern_exit.c Sat Dec 8 06:30:41 2018 (r341720)
+++ head/sys/kern/kern_exit.c Sat Dec 8 06:31:43 2018 (r341721)
@@ -556,6 +556,17 @@ exit1(struct thread *td, int rval, int signo)
PROC_UNLOCK(q);
}
+#ifdef KDTRACE_HOOKS
+ if (SDT_PROBES_ENABLED()) {
+ int reason = CLD_EXITED;
+ if (WCOREDUMP(signo))
+ reason = CLD_DUMPED;
+ else if (WIFSIGNALED(signo))
+ reason = CLD_KILLED;
+ SDT_PROBE1(proc, , , exit, reason);
+ }
+#endif
+
/* Save exit status. */
PROC_LOCK(p);
p->p_xthread = td;
@@ -573,15 +584,6 @@ exit1(struct thread *td, int rval, int signo)
* Notify interested parties of our demise.
*/
KNOTE_LOCKED(p->p_klist, NOTE_EXIT);
-
-#ifdef KDTRACE_HOOKS
- int reason = CLD_EXITED;
- if (WCOREDUMP(signo))
- reason = CLD_DUMPED;
- else if (WIFSIGNALED(signo))
- reason = CLD_KILLED;
- SDT_PROBE1(proc, , , exit, reason);
-#endif
/*
* If this is a process with a descriptor, we may not need to deliver
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