diff --git a/luni/src/test/java/libcore/java/security/PrivilegedActionExceptionTest.java b/luni/src/test/java/libcore/java/security/PrivilegedActionExceptionTest.java
new file mode 100644
index 0000000..0f965e5
--- /dev/null
+++ b/luni/src/test/java/libcore/java/security/PrivilegedActionExceptionTest.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package libcore.java.security;
+
+import junit.framework.TestCase;
+
+import java.security.PrivilegedActionException;
+
+public class PrivilegedActionExceptionTest extends TestCase {
+
+    /**
+     * PrivilegedActionException's constructor argument may be rethrown by getException() or
+     * getCause().
+     * b/31360928
+     */
+    public void testGetException() {
+        Exception e = new Exception();
+        PrivilegedActionException pae = new PrivilegedActionException(e);
+
+        assertSame(e, pae.getException());
+        assertSame(e, pae.getCause());
+    }
+}
diff --git a/ojluni/src/main/java/java/security/PrivilegedActionException.java b/ojluni/src/main/java/java/security/PrivilegedActionException.java
index af89fb5..83d855a 100755
--- a/ojluni/src/main/java/java/security/PrivilegedActionException.java
+++ b/ojluni/src/main/java/java/security/PrivilegedActionException.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1998, 2001, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1998, 2013, 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
@@ -27,11 +27,81 @@
 
 /**
  * Legacy security code; do not use.
+ *
+ * This exception is thrown by
+ * {@code doPrivileged(PrivilegedExceptionAction)} and
+ * {@code doPrivileged(PrivilegedExceptionAction,
+ * AccessControlContext context)} to indicate
+ * that the action being performed threw a checked exception.  The exception
+ * thrown by the action can be obtained by calling the
+ * {@code getException} method.  In effect, an
+ * {@code PrivilegedActionException} is a "wrapper"
+ * for an exception thrown by a privileged action.
+ *
+ * <p>As of release 1.4, this exception has been retrofitted to conform to
+ * the general purpose exception-chaining mechanism.  The "exception thrown
+ * by the privileged computation" that is provided at construction time and
+ * accessed via the {@link #getException()} method is now known as the
+ * <i>cause</i>, and may be accessed via the {@link Throwable#getCause()}
+ * method, as well as the aforementioned "legacy method."
+ *
+ * @see PrivilegedExceptionAction
+ * @see AccessController#doPrivileged(PrivilegedExceptionAction)
+ * @see AccessController#doPrivileged(PrivilegedExceptionAction,AccessControlContext)
  */
-
 public class PrivilegedActionException extends Exception {
+    // use serialVersionUID from JDK 1.2.2 for interoperability
+    private static final long serialVersionUID = 4724086851538908602L;
 
-    public PrivilegedActionException(Exception exception) { super(exception); }
+    /**
+     * @serial
+     */
+    private Exception exception;
 
-    public Exception getException() { return null; }
+    /**
+     * Constructs a new PrivilegedActionException &quot;wrapping&quot;
+     * the specific Exception.
+     *
+     * @param exception The exception thrown
+     */
+    public PrivilegedActionException(Exception exception) {
+        super((Throwable)null);  // Disallow initCause
+        this.exception = exception;
+    }
+
+    /**
+     * Returns the exception thrown by the privileged computation that
+     * resulted in this {@code PrivilegedActionException}.
+     *
+     * <p>This method predates the general-purpose exception chaining facility.
+     * The {@link Throwable#getCause()} method is now the preferred means of
+     * obtaining this information.
+     *
+     * @return the exception thrown by the privileged computation that
+     *         resulted in this {@code PrivilegedActionException}.
+     * @see PrivilegedExceptionAction
+     * @see AccessController#doPrivileged(PrivilegedExceptionAction)
+     * @see AccessController#doPrivileged(PrivilegedExceptionAction,
+     *                                            AccessControlContext)
+     */
+    public Exception getException() {
+        return exception;
+    }
+
+    /**
+     * Returns the cause of this exception (the exception thrown by
+     * the privileged computation that resulted in this
+     * {@code PrivilegedActionException}).
+     *
+     * @return  the cause of this exception.
+     * @since   1.4
+     */
+    public Throwable getCause() {
+        return exception;
+    }
+
+    public String toString() {
+        String s = getClass().getName();
+        return (exception != null) ? (s + ": " + exception.toString()) : s;
+    }
 }