6888149: AtomicReferenceArray causes SIGSEGV -> SEGV_MAPERR error

Summary: Avoid integer overflow by using long arithmetic
Reviewed-by: martin, dholmes

src/share/classes/java/util/concurrent/atomic/AtomicIntegerArray.java

@@ -57,7 +57,7 @@ public class AtomicIntegerArray implements java.io.Serializable {
     private long rawIndex(int i) {
         if (i < 0 || i >= array.length)
             throw new IndexOutOfBoundsException("index " + i);
-        return base + i * scale;
+        return base + (long) i * scale;
     }
 
     /**

src/share/classes/java/util/concurrent/atomic/AtomicLongArray.java

@@ -56,7 +56,7 @@ public class AtomicLongArray implements java.io.Serializable {
     private long rawIndex(int i) {
         if (i < 0 || i >= array.length)
             throw new IndexOutOfBoundsException("index " + i);
-        return base + i * scale;
+        return base + (long) i * scale;
     }
 
     /**

src/share/classes/java/util/concurrent/atomic/AtomicReferenceArray.java

@@ -57,7 +57,7 @@ public class AtomicReferenceArray<E> implements java.io.Serializable {
     private long rawIndex(int i) {
         if (i < 0 || i >= array.length)
             throw new IndexOutOfBoundsException("index " + i);
-        return base + i * scale;
+        return base + (long) i * scale;
     }
 
     /**