* java/lang/natClassLoader.cc (_Jv_RegisterInitiatingLoader):

	Check loading constraints.
	(_Jv_CheckOrCreateLoadingConstraint): New function.
	* java/lang/ClassLoader.java (loadingConstraints): New field.
	* link.cc (_Jv_Linker::find_field): Use
	_Jv_CheckOrCreateLoadingConstraint.
	(_Jv_Linker::check_loading_constraints): New function.
	(_Jv_Linker::resolve_method_entry): Use
	check_loading_constraints.
	(_Jv_Linker::append_partial_itable): Likewise.
	(_Jv_Linker::layout_vtable_methods): Likewise.
	* include/jvm.h (_Jv_Linker::check_loading_constraints): Declare.
	(_Jv_CheckOrCreateLoadingConstraint): Declare.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@133172 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 11 insertions, 1 deletions

diff --git a/libjava/java/lang/ClassLoader.java b/libjava/java/lang/ClassLoader.java
index 4682dbbf010..e0463ac2af6 100644
--- a/libjava/java/lang/ClassLoader.java
+++ b/libjava/java/lang/ClassLoader.java
@@ -1,5 +1,5 @@
 /* ClassLoader.java -- responsible for loading classes into the VM
-   Copyright (C) 1998, 1999, 2001, 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
+   Copyright (C) 1998, 1999, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
 
 This file is part of GNU Classpath.
 
@@ -45,6 +45,7 @@ import gnu.java.util.EmptyEnumeration;
 
 import java.io.IOException;
 import java.io.InputStream;
+import java.lang.ref.WeakReference;
 import java.net.URL;
 import java.nio.ByteBuffer;
 import java.security.CodeSource;
@@ -130,6 +131,15 @@ public abstract class ClassLoader
   final HashMap loadedClasses = new HashMap();
 
   /**
+   * Loading constraints registered with this classloader.  This maps
+   * a class name to a weak reference to a class.  When the reference
+   * is non-null, it means that a reference to the name must resolve
+   * to the indicated class.
+   */
+  final HashMap<String, WeakReference<Class>> loadingConstraints
+    = new HashMap<String, WeakReference<Class>>();
+
+  /**
    * All packages defined by this classloader. It is not private in order to
    * allow native code (and trusted subclasses) access to this field.
    */