mirror of git://gcc.gnu.org/git/gcc.git
136 lines
4.2 KiB
Java
136 lines
4.2 KiB
Java
/* gnu.java.lang.MainThread
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Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
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2006, 2008 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.java.lang;
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import java.io.File;
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import java.util.jar.Attributes;
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import java.util.jar.JarFile;
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/**
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* MainThread is a Thread which uses the main() method of some class.
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*
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* @author John Keiser
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* @author Tom Tromey (tromey@redhat.com)
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*/
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final class MainThread extends Thread
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{
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// If the user links statically then we need to ensure that these
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// classes are linked in. Otherwise bootstrapping fails. These
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// classes are only referred to via Class.forName(), so we add an
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// explicit mention of them here.
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static final Class Kcert = java.security.cert.Certificate.class;
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static final Class Kfile = gnu.java.net.protocol.file.Handler.class;
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static final Class Khttp = gnu.java.net.protocol.http.Handler.class;
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static final Class Kjar = gnu.java.net.protocol.jar.Handler.class;
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// Private data.
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private Class klass;
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private String klass_name;
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private String[] args;
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private boolean is_jar;
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public MainThread(Class k, String[] args)
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{
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super(null, null, "main");
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klass = k;
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this.args = args;
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}
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public MainThread(String classname, String[] args, boolean is_jar)
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{
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super (null, null, "main");
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klass_name = classname;
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this.args = args;
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this.is_jar = is_jar;
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}
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public void run()
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{
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if (is_jar)
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klass_name = getMain(klass_name);
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if (klass == null)
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{
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try
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{
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ClassLoader cl = ClassLoader.getSystemClassLoader();
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// Permit main class name to be specified in file-system format.
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klass_name = klass_name.replace(File.separatorChar, '.');
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klass = cl.loadClass(klass_name);
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}
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catch (ClassNotFoundException x)
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{
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NoClassDefFoundError ncdfe = new NoClassDefFoundError(klass_name);
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ncdfe.initCause(x);
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throw ncdfe;
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}
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}
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call_main();
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}
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private String getMain(String name)
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{
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String mainName = null;
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try
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{
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JarFile j = new JarFile(name);
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Attributes a = j.getManifest().getMainAttributes();
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mainName = a.getValue(Attributes.Name.MAIN_CLASS);
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}
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catch (Exception e)
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{
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// Ignore.
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}
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if (mainName == null)
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{
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System.err.println("Failed to load Main-Class manifest attribute from "
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+ name);
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System.exit(1);
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}
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return mainName;
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}
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// Note: this function name is known to the stack tracing code.
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// You shouldn't change this without also updating stacktrace.cc.
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private native void call_main();
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}
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