src/hotspot/share/gc/shenandoah/shenandoahTraversalGC.cpp

rev 57746 : 8240873: Shenandoah: Short-cut arraycopy barriers
Reviewed-by: shade

@@ -312,10 +312,11 @@
 void ShenandoahTraversalGC::prepare_regions() {
   size_t num_regions = _heap->num_regions();
   ShenandoahMarkingContext* const ctx = _heap->marking_context();
   for (size_t i = 0; i < num_regions; i++) {
     ShenandoahHeapRegion* region = _heap->get_region(i);
+    region->set_update_watermark(region->top());
     if (_heap->is_bitmap_slice_committed(region)) {
       if (_traversal_set.is_in(i)) {
         ctx->capture_top_at_mark_start(region);
         region->clear_live_data();
         assert(ctx->is_bitmap_clear_range(region->bottom(), region->end()), "bitmap for traversal regions must be cleared");