add vm_sync debug counters

* vm_sync_lock
* vm_sync_lock_enter
* vm_sync_lock_enter_nb
* vm_sync_lock_enter_cr
* vm_sync_barrier

1 files changed, 2 insertions, 0 deletions

diff --git a/vm_sync.c b/vm_sync.c
index 22c2299162..d2ce727202 100644
--- a/vm_sync.c
+++ b/vm_sync.c
@@ -228,6 +228,8 @@ vm_barrier_finish_p(rb_vm_t *vm)
 void
 rb_vm_barrier(void)
 {
+    RB_DEBUG_COUNTER_INC(vm_sync_barrier);
+
     if (!rb_multi_ractor_p()) {
         // no other ractors
         return;