re PR libgcj/28340 (gij ignores -Djava.security.manager)

2006-08-07  Gary Benson  <gbenson@redhat.com>

	PR libgcj/28340:
	* java/lang/ClassLoader.java (clinit): Install a default
	security manager if java.security.manager is defined.
	(getParent, getSystemClassLoader): Use the correct stack
	frame during security checks.
	* java/net/URLClassLoader.java (findClass): Avoid calling
	this.toString() during VM initialization.
	(runtimeInitialized): New method.
	* java/net/natURLClassLoader.cc: New file.
	* Makefile.am (nat_source_files): Added the above.
	* Makefile.in: Rebuilt.

From-SVN: r115999

libjava/java/lang/ClassLoader.java

@@ -38,6 +38,7 @@ exception statement from your version. */
 
 package java.lang;
 
+import gnu.classpath.SystemProperties;
 import gnu.java.util.DoubleEnumeration;
 import gnu.java.util.EmptyEnumeration;
 
@@ -156,6 +157,39 @@ public abstract class ClassLoader
   static final ClassLoader systemClassLoader =
     VMClassLoader.getSystemClassLoader();
 
+  static
+  {
+    // Find out if we have to install a default security manager. Note
+    // that this is done here because we potentially need the system
+    // class loader to load the security manager and note also that we
+    // don't need the security manager until the system class loader
+    // is created.  If the runtime chooses to use a class loader that
+    // doesn't have the system class loader as its parent, it is
+    // responsible for setting up a security manager before doing so.
+    String secman = SystemProperties.getProperty("java.security.manager");
+    if (secman != null && SecurityManager.current == null)
+    {
+      if (secman.equals("") || secman.equals("default"))
+      {
+	SecurityManager.current = new SecurityManager();
+      }
+      else
+      {
+	try
+	{
+	  Class cl = Class.forName(secman, false, systemClassLoader);
+	  SecurityManager.current = (SecurityManager) cl.newInstance();
+	}
+	catch (Exception x)
+	{
+	  throw (InternalError)
+	    new InternalError("Unable to create SecurityManager")
+	        .initCause(x);
+	}
+      }
+    }
+  }
+
   /**
    * The default protection domain, used when defining a class with a null
    * paramter for the domain.
@@ -496,7 +530,7 @@ public abstract class ClassLoader
     SecurityManager sm = System.getSecurityManager();
     if (sm != null)
       {
-        Class c = VMSecurityManager.getClassContext(ClassLoader.class)[1];
+        Class c = VMSecurityManager.getClassContext(ClassLoader.class)[0];
         ClassLoader cl = c.getClassLoader();
 	if (cl != null && ! cl.isAncestorOf(this))
           sm.checkPermission(new RuntimePermission("getClassLoader"));
@@ -739,7 +773,7 @@ public abstract class ClassLoader
     SecurityManager sm = System.getSecurityManager();
     if (sm != null)
       {
-	Class c = VMSecurityManager.getClassContext(ClassLoader.class)[1];
+	Class c = VMSecurityManager.getClassContext(ClassLoader.class)[0];
 	ClassLoader cl = c.getClassLoader();
 	if (cl != null && cl != systemClassLoader)
 	  sm.checkPermission(new RuntimePermission("getClassLoader"));

libjava/java/net/URLClassLoader.java

@@ -1078,7 +1078,12 @@ public class URLClassLoader extends SecureClassLoader
 	resource = loader.getResource(resourceName);
       }
     if (resource == null)
-      throw new ClassNotFoundException(className + " not found in " + this);
+      {
+	String message = className + " not found";
+	if (runtimeInitialized())
+	  message += " in " + this;
+	throw new ClassNotFoundException(message);
+      }
 
     // Try to read the class data, create the CodeSource, Package and
     // construct the class (and watch out for those nasty IOExceptions)
@@ -1437,4 +1442,11 @@ public class URLClassLoader extends SecureClassLoader
         return loader;
       }
   }
+
+  /**
+   * Tell whether runtime initialization is complete.
+   *
+   * @return whether runtime initialization is complete.
+   */
+  private static native boolean runtimeInitialized();  
 }

libjava/java/net/natURLClassLoader.cc

@@ -0,0 +1,22 @@
+// natURLClassLoader.cc -- Native part of the URLClassLoader class.
+
+/* Copyright (C) 2006 Free Software Foundation, Inc.
+
+   This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+#include <config.h>
+
+#include <gcj/cni.h>
+#include <jvm.h>
+
+#include <java/net/URLClassLoader.h>
+
+jboolean
+java::net::URLClassLoader::runtimeInitialized ()
+{
+  return gcj::runtimeInitialized;
+}