obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
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files in the upstream repository.

1 files changed, 148 insertions, 0 deletions

diff --git a/libjava/classpath/java/security/SecureClassLoader.java b/libjava/classpath/java/security/SecureClassLoader.java
new file mode 100644
index 000000000..1480b7116
--- /dev/null
+++ b/libjava/classpath/java/security/SecureClassLoader.java
@@ -0,0 +1,148 @@
+/* SecureClassLoader.java --- A Secure Class Loader
+   Copyright (C) 1999, 2004, 2006  Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath 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
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package java.security;
+
+import java.nio.ByteBuffer;
+import java.util.HashMap;
+
+/**
+ * A Secure Class Loader for loading classes with additional
+ * support for specifying code source and permissions when
+ * they are retrieved by the system policy handler.
+ *
+ * @since 1.2
+ *
+ * @author Mark Benvenuto
+ */
+public class SecureClassLoader extends ClassLoader
+{
+  private final HashMap<CodeSource,ProtectionDomain> protectionDomainCache
+    = new HashMap<CodeSource, ProtectionDomain>();
+
+  protected SecureClassLoader(ClassLoader parent)
+  {
+    super(parent);
+  }
+
+  protected SecureClassLoader()
+  {
+  }
+
+  /**
+   * Creates a class using an array of bytes and a
+   * CodeSource.
+   *
+   * @param name the name to give the class.  null if unknown.
+   * @param b the data representing the classfile, in classfile format.
+   * @param off the offset into the data where the classfile starts.
+   * @param len the length of the classfile data in the array.
+   * @param cs the CodeSource for the class or null when unknown.
+   *
+   * @return the class that was defined and optional CodeSource.
+   *
+   * @exception ClassFormatError if the byte array is not in proper classfile format.
+   */
+  protected final Class<?> defineClass(String name, byte[] b, int off, int len,
+                                    CodeSource cs)
+  {
+    return super.defineClass(name, b, off, len, getProtectionDomain(cs));
+  }
+
+  /**
+   * Creates a class using an ByteBuffer and a
+   * CodeSource.
+   *
+   * @param name the name to give the class.  null if unknown.
+   * @param b the data representing the classfile, in classfile format.
+   * @param cs the CodeSource for the class or null when unknown.
+   *
+   * @return the class that was defined and optional CodeSource.
+   *
+   * @exception ClassFormatError if the byte array is not in proper classfile format.
+   *
+   * @since 1.5
+   */
+  protected final Class<?> defineClass(String name, ByteBuffer b, CodeSource cs)
+  {
+    return super.defineClass(name, b, getProtectionDomain(cs));
+  }
+
+  /* Lookup or create a protection domain for the CodeSource,
+   * if CodeSource is null it will return null. */
+  private ProtectionDomain getProtectionDomain(CodeSource cs)
+  {
+    ProtectionDomain protectionDomain = null;
+    if (cs != null)
+      {
+        synchronized (protectionDomainCache)
+          {
+            protectionDomain = protectionDomainCache.get(cs);
+          }
+
+        if (protectionDomain == null)
+          {
+            protectionDomain
+              = new ProtectionDomain(cs, getPermissions(cs), this, null);
+            synchronized (protectionDomainCache)
+              {
+                ProtectionDomain domain = protectionDomainCache.get(cs);
+                if (domain == null)
+                  protectionDomainCache.put(cs, protectionDomain);
+                else
+                  protectionDomain = domain;
+              }
+          }
+      }
+    return protectionDomain;
+  }
+
+  /**
+   * Returns a PermissionCollection for the specified CodeSource.
+   * The default implementation invokes
+   * java.security.Policy.getPermissions.
+   *
+   * This method is called by defineClass that takes a CodeSource
+   * argument to build a proper ProtectionDomain for the class
+   * being defined.
+   */
+  protected PermissionCollection getPermissions(CodeSource cs)
+  {
+    Policy policy = Policy.getCurrentPolicy();
+    return policy.getPermissions(cs);
+  }
+}