//
//go:nowritebarrierrec
func (prof *mLockProfile) recordUnlock(l *mutex) {
	if uintptr(unsafe.Pointer(l)) == prof.pending {
		prof.captureStack()
	}
	if gp := getg(); gp.m.locks == 1 && gp.m.mLockProfile.cycles != 0 {
		prof.store()
	}
}

func (prof *mLockProfile) captureStack() {
	if debug.profstackdepth == 0 {
		// profstackdepth is set to 0 by the user, so mp.profStack is nil and we
		// can't record a stack trace.