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

@@ -61,11 +61,11 @@
   uint32_t refcount = Atomic::load(&_refcount);
 
   while (refcount > 0) {
     const uint32_t old_refcount = refcount;
     const uint32_t new_refcount = old_refcount + 1;
-    const uint32_t prev_refcount = Atomic::cmpxchg(new_refcount, &_refcount, old_refcount);
+    const uint32_t prev_refcount = Atomic::cmpxchg(&_refcount, old_refcount, new_refcount);
     if (prev_refcount == old_refcount) {
       return true;
     }
 
     refcount = prev_refcount;

@@ -137,11 +137,11 @@
 inline uintptr_t ZForwarding::insert(uintptr_t from_index, uintptr_t to_offset, ZForwardingCursor* cursor) {
   const ZForwardingEntry new_entry(from_index, to_offset);
   const ZForwardingEntry old_entry; // Empty
 
   for (;;) {
-    const ZForwardingEntry prev_entry = Atomic::cmpxchg(new_entry, entries() + *cursor, old_entry);
+    const ZForwardingEntry prev_entry = Atomic::cmpxchg(entries() + *cursor, old_entry, new_entry);
     if (!prev_entry.populated()) {
       // Success
       return to_offset;
     }