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Proxy.java (generate): Uncomment protection domain code.

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* java/lang/reflect/Proxy.java (generate): Uncomment protection
	domain code.
	* java/lang/natClassLoader.cc (defineClass): Added `loader'
	argument.
	(linkClass0): Now in VMClassLoader.
	(markClassErrorState0): Likewise.
	(getSystemClassLoaderInternal): New method.
	* java/lang/natClass.cc (initializeClass): Use
	VMClassLoader::resolveClass.
	* java/lang/ClassLoader.java: New version, from Classpath.
	* java/lang/Class.java (getProtectionDomain):
	protectionDomainPermission and unknownProtectionDomain now in
	VMClassLoader.
	* java/lang/Class.h: VMClassLoader now a friend class.
	* gnu/gcj/runtime/VMClassLoader.java (instance): Now
	package-private.
	* gcj/javaprims.h: Regenerated class list.
	* resolve.cc (_Jv_PrepareClass): Use VMClassLoader::resolveClass.
	* java/lang/VMClassLoader.java: New version from Classpath;
	modified for libgcj use.

From-SVN: r71765
This commit is contained in:
Tom Tromey 2003-09-25 07:46:19 +00:00 • committed by Tom Tromey
parent d70f15d251
commit b9f42bb060
11 changed files with 910 additions and 720 deletions
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299
libjava/java/lang/VMClassLoader.java
View file

@ -1,66 +1,237 @@
/*
* java.lang.ClassLoader: part of the Java Class Libraries project.
* Copyright (C) 1998, 2001, 2002 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.
*/
/* VMClassLoader.java -- Reference implementation of native interface
required by ClassLoader
Copyright (C) 1998, 2001, 2002, 2003 Free Software Foundation
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., 59 Temple Place, Suite 330, Boston, MA
02111-1307 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.lang;
import java.util.*;
import java.security.ProtectionDomain;
import java.net.URL;
import java.io.IOException;
import java.util.Enumeration;
import java.util.Map;
import java.util.HashMap;
import java.lang.reflect.Constructor;
import java.security.AllPermission;
import java.security.Permission;
import java.security.Permissions;
import java.security.ProtectionDomain;
import gnu.java.util.EmptyEnumeration;
/**
* java.lang.VMClassLoader is a package-private helper for VMs to implement
* on behalf of java.lang.ClassLoader.
*
* @author John Keiser
* @version 1.1.0, Sep 22 1998
* @since CP1.1
* @author Mark Wielaard <mark@klomp.org>
* @author Eric Blake <ebb9@email.byu.edu>
*/
final class VMClassLoader
{
// Protection Domain definitions
// FIXME: should there be a special protection domain used for native code?
// The permission required to check what a classes protection domain is.
static final Permission protectionDomainPermission
= new RuntimePermission("getProtectionDomain");
// The protection domain returned if we cannot determine it.
static ProtectionDomain unknownProtectionDomain;
class VMClassLoader {
static
{
Permissions permissions = new Permissions();
permissions.add(new AllPermission());
unknownProtectionDomain = new ProtectionDomain(null, permissions);
}
/**
* Helper to define a class using a string of bytes.
*
* @param name the name to give the class. null if unknown.
* @param data the data representing the classfile, in classfile format.
* @param offset the offset into the data where the classfile starts.
* @param len the length of the classfile data in the array.
* @return the class that was defined.
* @exception ClassFormatError if the byte array is not in proper classfile format.
*/
final static native Class defineClass(ClassLoader cl, String name,
byte[] data, int offset, int len)
throws ClassFormatError;
/**
* Helper to define a class using a string of bytes. This assumes that
* the security checks have already been performed, if necessary.
*
* <strong>For backward compatibility, this just ignores the protection
* domain; that is the wrong behavior, and you should directly implement
* this method natively if you can.</strong>
*
* @param name the name to give the class, or null if unknown
* @param data the data representing the classfile, in classfile format
* @param offset the offset into the data where the classfile starts
* @param len the length of the classfile data in the array
* @param pd the protection domain
* @return the class that was defined
* @throws ClassFormatError if data is not in proper classfile format
*/
static final native Class defineClass(ClassLoader cl, String name,
byte[] data, int offset, int len,
ProtectionDomain pd)
throws ClassFormatError;
/**
* Helper to resolve all references to other classes from this class.
* @param c the class to resolve.
*/
// Not yet needed for libgcj.
// final static native void resolveClass(Class c);
static final native void linkClass0 (Class klass);
static final native void markClassErrorState0 (Class klass);
/**
* Helper for java.lang.Integer, Byte, etc. to get the TYPE class
* at initialization time.
*
* @param type code for the primitive type.
*/
static native Class getPrimitiveClass(char type);
/**
* Helper to resolve all references to other classes from this class.
*
* @param c the class to resolve
*/
static final void resolveClass(Class clazz)
{
synchronized (clazz)
{
try
{
linkClass0 (clazz);
}
catch (Throwable x)
{
markClassErrorState0 (clazz);
LinkageError e;
if (x instanceof LinkageError)
e = (LinkageError) x;
else if (x instanceof ClassNotFoundException)
{
e = new NoClassDefFoundError("while resolving class: "
+ clazz.getName());
e.initCause (x);
}
else
{
e = new LinkageError ("unexpected exception during linking: "
+ clazz.getName());
e.initCause (x);
}
throw e;
}
}
}
/**
* Helper to load a class from the bootstrap class loader.
*
* In libgcj, this does nothing, as the default system loader knows
* how to find classes that have been linked in.
*
* @param name the class name to load
* @param resolve whether to resolve it
* @return the class, loaded by the bootstrap classloader or null
* if the class wasn't found. Returning null is equivalent to throwing
* a ClassNotFoundException (but a possible performance optimization).
*/
static final Class loadClass(String name, boolean resolve)
throws ClassNotFoundException
{
return null;
}
/**
* Helper to load a resource from the bootstrap class loader.
*
* In libgcj, this does nothing, as the default system loader knows
* how to find resources that have been linked in.
*
* @param name the resource to find
* @return the URL to the resource
*/
static URL getResource(String name)
{
return null;
}
/**
* Helper to get a list of resources from the bootstrap class loader.
*
* In libgcj, this does nothing, as the default system loader knows
* how to find resources that have been linked in.
*
* @param name the resource to find
* @return an enumeration of resources
* @throws IOException if one occurs
*/
static Enumeration getResources(String name) throws IOException
{
return EmptyEnumeration.getInstance();
}
/**
* Helper to get a package from the bootstrap class loader. The default
* implementation of returning null may be adequate, or you may decide
* that this needs some native help.
*
* @param name the name to find
* @return the named package, if it exists
*/
static Package getPackage(String name)
{
return null;
}
/**
* Helper to get all packages from the bootstrap class loader. The default
* implementation of returning an empty array may be adequate, or you may
* decide that this needs some native help.
*
* @return all named packages, if any exist
*/
static Package[] getPackages()
{
return new Package[0];
}
/**
* Helper for java.lang.Integer, Byte, etc to get the TYPE class
* at initialization time. The type code is one of the chars that
* represents the primitive type as in JNI.
*
* <ul>
* <li>'Z' - boolean</li>
* <li>'B' - byte</li>
* <li>'C' - char</li>
* <li>'D' - double</li>
* <li>'F' - float</li>
* <li>'I' - int</li>
* <li>'J' - long</li>
* <li>'S' - short</li>
* <li>'V' - void</li>
* </ul>
*
* @param type the primitive type
* @return a "bogus" class representing the primitive type
*/
static final native Class getPrimitiveClass(char type);
/**
* The system default for assertion status. This is used for all system
@ -104,4 +275,34 @@ class VMClassLoader {
{
return new HashMap();
}
static native ClassLoader getSystemClassLoaderInternal();
static ClassLoader getSystemClassLoader()
{
// This method is called as the initialization of systemClassLoader,
// so if there is a null value, this is the first call and we must check
// for java.system.class.loader.
String loader = System.getProperty("java.system.class.loader");
ClassLoader default_sys = getSystemClassLoaderInternal();
if (loader != null)
{
try
{
Class load_class = Class.forName(loader, true, default_sys);
Constructor c
= load_class.getConstructor(new Class[] { ClassLoader.class });
default_sys
= (ClassLoader) c.newInstance(new Object[] { default_sys });
}
catch (Exception e)
{
System.err.println("Requested system classloader "
+ loader + " failed, using "
+ "gnu.gcj.runtime.VMClassLoader");
e.printStackTrace();
}
}
return default_sys;
}
}