diff options
author | John Baldwin <jhb@FreeBSD.org> | 2007-06-13 20:01:42 +0000 |
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committer | John Baldwin <jhb@FreeBSD.org> | 2007-06-13 20:01:42 +0000 |
commit | 34a9edafbc5a13fa5f16c5e4e9f9f5df7d04f262 (patch) | |
tree | 04c4626ae55b88c5f4812648c9e15bb1ef22b6fc /sys/kern | |
parent | ce0be646879c129805b2c182608f06c4ef97022b (diff) | |
download | src-34a9edafbc5a13fa5f16c5e4e9f9f5df7d04f262.tar.gz src-34a9edafbc5a13fa5f16c5e4e9f9f5df7d04f262.zip |
Notes
Diffstat (limited to 'sys/kern')
-rw-r--r-- | sys/kern/kern_exit.c | 42 | ||||
-rw-r--r-- | sys/kern/kern_ktrace.c | 2 |
2 files changed, 26 insertions, 18 deletions
diff --git a/sys/kern/kern_exit.c b/sys/kern/kern_exit.c index 7700a8f9271a..696a1017e16a 100644 --- a/sys/kern/kern_exit.c +++ b/sys/kern/kern_exit.c @@ -356,26 +356,32 @@ retry: mtx_unlock(&Giant); #ifdef KTRACE /* - * Drain any pending records on the thread and release the trace - * file. It might be better if drain-and-clear were atomic. + * Disable tracing, then drain any pending records and release + * the trace file. */ - ktrprocexit(td); - PROC_LOCK(p); - mtx_lock(&ktrace_mtx); - p->p_traceflag = 0; /* don't trace the vrele() */ - tracevp = p->p_tracevp; - p->p_tracevp = NULL; - tracecred = p->p_tracecred; - p->p_tracecred = NULL; - mtx_unlock(&ktrace_mtx); - PROC_UNLOCK(p); - if (tracevp != NULL) { - locked = VFS_LOCK_GIANT(tracevp->v_mount); - vrele(tracevp); - VFS_UNLOCK_GIANT(locked); + if (p->p_traceflag != 0) { + PROC_LOCK(p); + mtx_lock(&ktrace_mtx); + p->p_traceflag = 0; + mtx_unlock(&ktrace_mtx); + PROC_UNLOCK(p); + ktrprocexit(td); + PROC_LOCK(p); + mtx_lock(&ktrace_mtx); + tracevp = p->p_tracevp; + p->p_tracevp = NULL; + tracecred = p->p_tracecred; + p->p_tracecred = NULL; + mtx_unlock(&ktrace_mtx); + PROC_UNLOCK(p); + if (tracevp != NULL) { + locked = VFS_LOCK_GIANT(tracevp->v_mount); + vrele(tracevp); + VFS_UNLOCK_GIANT(locked); + } + if (tracecred != NULL) + crfree(tracecred); } - if (tracecred != NULL) - crfree(tracecred); #endif /* * Release reference to text vnode diff --git a/sys/kern/kern_ktrace.c b/sys/kern/kern_ktrace.c index 2b7ee33a9cd7..0ca4a3028fd5 100644 --- a/sys/kern/kern_ktrace.c +++ b/sys/kern/kern_ktrace.c @@ -444,6 +444,8 @@ void ktruserret(struct thread *td) { + if (STAILQ_EMPTY(&td->td_proc->p_ktr)) + return; ktrace_enter(td); sx_xlock(&ktrace_sx); ktr_drain(td); |