gistfile1.diff

diff --git a/exception/src/main/java/java/lang/Exception.java b/exception/src/main/java/java/lang/Exception.java
index db67518..6ed84ea 100644
--- a/exception/src/main/java/java/lang/Exception.java
+++ b/exception/src/main/java/java/lang/Exception.java
@@ -30,7 +30,7 @@ package java.lang;
 public class Exception extends Throwable {
     private static final long serialVersionUID = -3387516993124229948L;
 
-    private transient Class[] classContext = sm.getThrowableContext(this);
+    private transient Class[] classContext = getSm().getThrowableContext(this);
 
     /**
      * Constructs a new {@code Exception} that includes the current stack trace.
@@ -78,9 +78,16 @@ public class Exception extends Throwable {
         return classContext;
     }
 
-    private static final SecurityManagerEx sm = new SecurityManagerEx();
+    private static volatile SecurityManagerEx sm;
 
-    static class SecurityManagerEx extends SecurityManager
+    private static SecurityManagerEx getSm() {
+        if (sm == null) {
+            sm = new SecurityManagerEx();
+        }
+        return sm;
+    }
+
+    private static class SecurityManagerEx extends SecurityManager
     {
         public Class[] getClassContext()
         {