src/hotspot/share/gc/z/zObjectAllocator.cpp

@@ -61,19 +61,19 @@
 
 ZPage* ZObjectAllocator::alloc_page(uint8_t type, size_t size, ZAllocationFlags flags) {
   ZPage* const page = ZHeap::heap()->alloc_page(type, size, flags);
   if (page != NULL) {
     // Increment used bytes
-    Atomic::add(size, _used.addr());
+    Atomic::add(_used.addr(), size);
   }
 
   return page;
 }
 
 void ZObjectAllocator::undo_alloc_page(ZPage* page) {
   // Increment undone bytes
-  Atomic::add(page->size(), _undone.addr());
+  Atomic::add(_undone.addr(), page->size());
 
   ZHeap::heap()->undo_alloc_page(page);
 }
 
 uintptr_t ZObjectAllocator::alloc_object_in_shared_page(ZPage** shared_page,

@@ -95,11 +95,11 @@
       // Allocate object before installing the new page
       addr = new_page->alloc_object(size);
 
     retry:
       // Install new page
-      ZPage* const prev_page = Atomic::cmpxchg(new_page, shared_page, page);
+      ZPage* const prev_page = Atomic::cmpxchg(shared_page, page, new_page);
       if (prev_page != page) {
         if (prev_page == NULL) {
           // Previous page was retired, retry installing the new page
           page = prev_page;
           goto retry;