src/hotspot/share/gc/z/zPage.inline.hpp

*** 292,301 ****
--- 292,304 ----
    if (new_top != offset) {
      // Failed to undo allocation, not the last allocated object
      return false;
    }
  
+   // Clear memory
+   ZUtils::zero(addr, size);
+ 
    _top = new_top;
  
    // Success
    return true;
  }
*** 312,321 ****
--- 315,327 ----
      if (new_top != offset) {
        // Failed to undo allocation, not the last allocated object
        return false;
      }
  
+     // Clear memory
+     ZUtils::zero(addr, size);
+ 
      const uintptr_t prev_top = Atomic::cmpxchg(new_top, &_top, old_top);
      if (prev_top == old_top) {
        // Success
        return true;
      }