1 files changed, 71 insertions, 0 deletions
diff --git a/libjava/java/lang/VMSecurityManager.java b/libjava/java/lang/VMSecurityManager.java
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+++ b/libjava/java/lang/VMSecurityManager.java
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+/*
+ * java.lang.SecurityManager: part of the Java Class Libraries project.
+ * Copyright (C) 1998, 2001 Free Software Foundation
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA  02111-1307, USA.
+ */
+
+package java.lang;
+
+import java.net.*;
+import java.util.*;
+import java.io.*;
+
+/**
+ ** VMSecurityManager is a helper class for SecurityManager the VM must
+ ** implement.
+ **
+ ** @author  John Keiser
+ ** @version 1.1.0, 31 May 1998
+ **/
+class VMSecurityManager
+{
+  /** Get a list of all the classes currently executing
+   ** methods on the Java stack.  getClassContext()[0] is
+   ** the currently executing method
+   ** <STRONG>Spec Note:</STRONG> does not say whether
+   ** the stack will include the getClassContext() call or
+   ** the one just before it.
+   **
+   ** @return an array containing all the methods on classes
+   **         on the Java execution stack.
+   **/
+  static Class[] getClassContext()
+  {
+    // FIXME: can't yet implement this for libgcj.
+    return new Class[0];
+  }
+
+  /** Get the current ClassLoader--the one nearest to the
+   ** top of the stack.
+   ** @return the current ClassLoader.
+   **/
+  static ClassLoader currentClassLoader()
+  {
+    // The docs above are wrong.  See the online docs.
+    // FIXME this implementation is a bit wrong too -- the docs say we
+    // must also consider ancestors of the system class loader.
+    Class[] classStack = getClassContext ();
+    for (int i = 0; i < classStack.length; i++)
+      {
+	ClassLoader loader = classStack[i].getClassLoader();
+	if (loader != null)
+	  return loader;
+      }
+
+    return null;
+  }
+}