src/share/classes/java/util/ArrayList.java

rev 12533 : 8174109: Better queuing priorities
Reviewed-by: smarks

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this

@@ -26,10 +26,11 @@
 package java.util;
 
 import java.util.function.Consumer;
 import java.util.function.Predicate;
 import java.util.function.UnaryOperator;
+import sun.misc.SharedSecrets;
 
 /**
  * Resizable-array implementation of the <tt>List</tt> interface.  Implements
  * all optional list operations, and permits all elements, including
  * <tt>null</tt>.  In addition to implementing the <tt>List</tt> interface,

@@ -217,16 +218,19 @@
         if (minCapacity > minExpand) {
             ensureExplicitCapacity(minCapacity);
         }
     }
 
-    private void ensureCapacityInternal(int minCapacity) {
+    private static int calculateCapacity(Object[] elementData, int minCapacity) {
         if (elementData == DEFAULTCAPACITY_EMPTY_ELEMENTDATA) {
-            minCapacity = Math.max(DEFAULT_CAPACITY, minCapacity);
+            return Math.max(DEFAULT_CAPACITY, minCapacity);
+        }
+        return minCapacity;
         }
 
-        ensureExplicitCapacity(minCapacity);
+    private void ensureCapacityInternal(int minCapacity) {
+        ensureExplicitCapacity(calculateCapacity(elementData, minCapacity));
     }
 
     private void ensureExplicitCapacity(int minCapacity) {
         modCount++;
 

@@ -781,10 +785,12 @@
         // Read in capacity
         s.readInt(); // ignored
 
         if (size > 0) {
             // be like clone(), allocate array based upon size not capacity
+            int capacity = calculateCapacity(elementData, size);
+            SharedSecrets.getJavaOISAccess().checkArray(s, Object[].class, capacity);
             ensureCapacityInternal(size);
 
             Object[] a = elementData;
             // Read in all elements in the proper order.
             for (int i=0; i<size; i++) {