1 /*

     2  * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 package jdk.test.lib.util;

    25 

    26 import java.io.File;

    27 import java.io.IOException;

    28 import java.nio.file.Path;

    29 import java.nio.file.Paths;

    30 import java.util.Arrays;

    31 import java.util.jar.Attributes;

    32 import java.util.jar.Manifest;

    33 

    34 import jdk.test.lib.Utils;

    35 import jdk.test.lib.util.JarUtils;

    36 

    37 /**

    38  * A builder for a common Java agent.

    39  * Can be used directly from the jtreg test header to

    40  * build a java agent before the test is executed.

    41  *

    42  * E.g.:

    43  * @run driver jdk.test.lib.util.JavaAgentBuilder

    44  *             jdk.jfr.javaagent.EventEmitterAgent EventEmitterAgent.jar

    45  *

    46  */

    47 public class JavaAgentBuilder {

    48 

    49     /**

    50      * Build a java agent jar file with a given agent class.

    51      *

    52      * @param args[0]    fully qualified name of an agent class

    53      * @param args[1]    file name of the agent jar to be created

    54      * @throws IOException

    55      */

    56     public static void main(String... args) throws IOException {

    57         String agentClass = args[0];

    58         String agentJar = args[1];

    59         System.out.println("Building " + agentJar + " with agent class " + agentClass);

    60         build(agentClass, agentJar);

    61     }

    62 

    63     /**

    64      * Build a java agent jar file with a given agent class.

    65      * The agent class will be added as both premain class and agent class.

    66      *

    67      * @param agentClass fully qualified name of an agent class

    68      * @param agentJar   file name of the agent jar to be created

    69      *                   the file will be placed in a current work directory

    70      * @throws IOException

    71      */

    72     public static void build(String agentClass, String agentJar) throws IOException {

    73         Manifest mf = new Manifest();

    74         Attributes attrs = mf.getMainAttributes();

    75         attrs.put(Attributes.Name.MANIFEST_VERSION, "1.0");

    76         attrs.putValue("Premain-Class", agentClass);

    77         attrs.putValue("Agent-Class", agentClass);

    78 

    79         Path jarFile = Paths.get(".", agentJar);

    80         String testClasses = Utils.TEST_CLASSES;

    81         String agentPath = agentClass.replace(".", File.separator) + ".class";

    82         Path agentFile = Paths.get(testClasses, agentPath);

    83         Path dir = Paths.get(testClasses);

    84         JarUtils.createJarFile(jarFile, mf, dir, agentFile);

    85         System.out.println("Agent built:" + jarFile.toAbsolutePath());

    86     }

    87 }