--- jsr166/src/jdk8/java/util/concurrent/ThreadPoolExecutor.java	2017/06/04 23:04:03	1.2
+++ jsr166/src/jdk8/java/util/concurrent/ThreadPoolExecutor.java	2017/07/24 15:09:05	1.3
@@ -6,6 +6,9 @@
 
 package java.util.concurrent;
 
+import java.security.AccessControlContext;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
 import java.util.ArrayList;
 import java.util.ConcurrentModificationException;
 import java.util.HashSet;
@@ -544,6 +547,9 @@ public class ThreadPoolExecutor extends
     private static final RuntimePermission shutdownPerm =
         new RuntimePermission("modifyThread");
 
+    /** The context to be used when executing the finalizer, or null. */
+    private final AccessControlContext acc;
+
     /**
      * Class Worker mainly maintains interrupt control state for
      * threads running tasks, along with other minor bookkeeping.
@@ -1279,6 +1285,9 @@ public class ThreadPoolExecutor extends
             throw new IllegalArgumentException();
         if (workQueue == null || threadFactory == null || handler == null)
             throw new NullPointerException();
+        this.acc = (System.getSecurityManager() == null)
+            ? null
+            : AccessController.getContext();
         this.corePoolSize = corePoolSize;
         this.maximumPoolSize = maximumPoolSize;
         this.workQueue = workQueue;
@@ -1448,9 +1457,18 @@ public class ThreadPoolExecutor extends
     /**
      * Invokes {@code shutdown} when this executor is no longer
      * referenced and it has no threads.
+     *
+     * <p>This method is invoked with privileges that are restricted by
+     * the security context of the caller that invokes the constructor.
      */
     protected void finalize() {
-        shutdown();
+        SecurityManager sm = System.getSecurityManager();
+        if (sm == null || acc == null) {
+            shutdown();
+        } else {
+            PrivilegedAction<Void> pa = () -> { shutdown(); return null; };
+            AccessController.doPrivileged(pa, acc);
+        }
     }
 
     /**