src/hotspot/share/runtime/os.cpp

@@ -853,11 +853,11 @@
 int os::random() {
   // Make updating the random seed thread safe.
   while (true) {
     unsigned int seed = _rand_seed;
     unsigned int rand = random_helper(seed);
-    if (Atomic::cmpxchg(rand, &_rand_seed, seed) == seed) {
+    if (Atomic::cmpxchg(&_rand_seed, seed, rand) == seed) {
       return static_cast<int>(rand);
     }
   }
 }
 

@@ -1802,11 +1802,11 @@
  * returns the state set after the method is complete
  */
 os::SuspendResume::State os::SuspendResume::switch_state(os::SuspendResume::State from,
                                                          os::SuspendResume::State to)
 {
-  os::SuspendResume::State result = Atomic::cmpxchg(to, &_state, from);
+  os::SuspendResume::State result = Atomic::cmpxchg(&_state, from, to);
   if (result == from) {
     // success
     return to;
   }
   return result;