/*
* Copyright ( c ) 2019 , 2022 , Oracle and / or its affiliates . All rights reserved .
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
*
* This code is free software ; you can redistribute it and / or modify it
* under the terms of the GNU General Public License version 2 only , as
* published by the Free Software Foundation .
*
* This code 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
* version 2 for more details ( a copy is included in the LICENSE file that
* accompanied this code ) .
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work ; if not , write to the Free Software Foundation ,
* Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA .
*
* Please contact Oracle , 500 Oracle Parkway , Redwood Shores , CA 94065 USA
* or visit www . oracle . com if you need additional information or have any
* questions .
*/
package jdk.test.lib.util;
import java.io.File;
import java.io.IOException;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Map;
import java.util.HashMap;
import java.util.jar.Attributes;
import java.util.jar.Manifest;
import jdk.test.lib.Utils;
/**
* A builder for a common Java agent .
* Can be used directly from the jtreg test header to
* build a java agent before the test is executed .
*
* E . g . :
* @ run driver jdk . test . lib . util . JavaAgentBuilder
* jdk . jfr . javaagent . EventEmitterAgent EventEmitterAgent . jar
*
*/
public class JavaAgentBuilder {
/**
* Build a java agent jar file with a given agent class .
*
* @ param args [ 0 ] fully qualified name of an agent class
* @ param args [ 1 ] file name of the agent jar to be created
* @ throws IOException
*/
public static void main(String... args) throws Exception {
String agentClass = args[0 ];
String agentJar = args[1 ];
System.out.println("Building " + agentJar + " with agent class " + agentClass);
build(agentClass, agentJar, parseExtraAttrs(args));
}
private static Map<String,String> parseExtraAttrs(String[] args) throws Exception {
Map<String,String> attrs = new HashMap<>();
for (int i = 2 ; i < args.length; i++) {
String[] parts = args[i].split(":" );
if (parts.length != 2 ) {
throw new IllegalArgumentException("Extra attributes should be of format 'key:value'" );
}
attrs.put(parts[0 ],parts[1 ]);
}
return attrs;
}
/**
* Build a java agent jar file with a given agent class .
* The agent class will be added as both premain class and agent class .
*
* @ param agentClass fully qualified name of an agent class
* @ param agentJar file name of the agent jar to be created
* the file will be placed in a current work directory
* @ throws IOException
*/
public static void build(String agentClass, String agentJar) throws IOException {
build(agentClass, agentJar, new HashMap<String, String>());
}
/**
* Build a java agent jar file with a given agent class .
* The agent class will be added as both premain class and agent class .
*
* @ param agentClass fully qualified name of an agent class
* @ param agentJar file name of the agent jar to be created
* the file will be placed in a current work directory
* @ param extraAttrs additional manifest attributes
* @ throws IOException
*/
public static void build(String agentClass, String agentJar,
Map<String, String> extraAttrs) throws IOException {
Manifest mf = new Manifest();
Attributes attrs = mf.getMainAttributes();
attrs.put(Attributes.Name.MANIFEST_VERSION, "1.0" );
attrs.putValue("Can-Redefine-Classes" , "true" );
attrs.putValue("Can-Retransform-Classes" , "true" );
attrs.putValue("Premain-Class" , agentClass);
attrs.putValue("Agent-Class" , agentClass);
extraAttrs.forEach( (k,v) -> attrs.putValue(k,v));
Path jarFile = Paths.get("." , agentJar);
String testClasses = Utils.TEST_CLASSES;
String agentPath = agentClass.replace("." , File.separator) + ".class" ;
Path agentFile = Paths.get(testClasses, agentPath);
Path dir = Paths.get(testClasses);
JarUtils.createJarFile(jarFile, mf, dir, agentFile);
System.out.println("Agent built:" + jarFile.toAbsolutePath());
}
}
Messung V0.5 in Prozent C=95 H=91 G=92
¤ Dauer der Verarbeitung: 0.9 Sekunden
(vorverarbeitet am 2026-10-11)
¤
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