Date: Tue, 20 Feb 2018 20:39:34 +0000 (UTC) From: Mateusz Guzik <mjg@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r329666 - head/sys/kern Message-ID: <201802202039.w1KKdYXx058003@repo.freebsd.org>
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Author: mjg Date: Tue Feb 20 20:39:34 2018 New Revision: 329666 URL: https://svnweb.freebsd.org/changeset/base/329666 Log: mtx: add debug assertions to mtx_spin_wait_unlocked Modified: head/sys/kern/kern_mutex.c Modified: head/sys/kern/kern_mutex.c ============================================================================== --- head/sys/kern/kern_mutex.c Tue Feb 20 20:37:01 2018 (r329665) +++ head/sys/kern/kern_mutex.c Tue Feb 20 20:39:34 2018 (r329666) @@ -1231,6 +1231,14 @@ mtx_spin_wait_unlocked(struct mtx *m) { struct lock_delay_arg lda; + KASSERT(m->mtx_lock != MTX_DESTROYED, + ("%s() of destroyed mutex %p", __func__, m)); + KASSERT(LOCK_CLASS(&m->lock_object) == &lock_class_mtx_spin, + ("%s() of sleep mutex %p (%s)", __func__, m, + m->lock_object.lo_name)); + KASSERT(!mtx_owned(m), ("%s() waiting on myself on lock %p (%s)", __func__, m, + m->lock_object.lo_name)); + lda.spin_cnt = 0; while (atomic_load_acq_ptr(&m->mtx_lock) != MTX_UNOWNED) {
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