jdk8-mips64-public/hotspot: test/testlibrary/ClassFileInstaller.java@6cfec782c42c (annotated)

test/testlibrary/ClassFileInstaller.java@6cfec782c42c (annotated)

test/testlibrary/ClassFileInstaller.java

Thu, 26 Jul 2018 06:16:09 -0400

author: vaibhav
date: Thu, 26 Jul 2018 06:16:09 -0400
changeset 9421: 6cfec782c42c
parent 5100: 43083e670adf
child 9448: 73d689add964
permissions: -rw-r--r--

8189762: [TESTBUG] Create tests for JDK-8146115 container awareness and resource configuration
Summary: Created tests for the feature
Reviewed-by: mseledtsov

 /*
  * Copyright (c) 2013, 2018, 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.
  */
 import java.io.ByteArrayInputStream;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.FileNotFoundException;
 import java.io.InputStream;
 import java.io.ByteArrayInputStream;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.nio.file.StandardCopyOption;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipOutputStream;
 /**
  * Dump a class file for a class on the class path in the current directory, or
  * in the specified JAR file. This class is usually used when you build a class
  * from a test library, but want to use this class in a sub-process.
  *
  * For example, to build the following library class:
  * test/lib/sun/hotspot/WhiteBox.java
  *
  * You would use the following tags:
  *
  * @library /test/lib
  * @build sun.hotspot.WhiteBox
  *
  * JTREG would build the class file under
  * ${JTWork}/classes/test/lib/sun/hotspot/WhiteBox.class
  *
  * With you run your main test class using "@run main MyMainClass", JTREG would setup the
  * -classpath to include "${JTWork}/classes/test/lib/", so MyMainClass would be able to
  * load the WhiteBox class.
  *
  * However, if you run a sub process, and do not wish to use the exact same -classpath,
  * You can use ClassFileInstaller to ensure that WhiteBox is available in the current
  * directory of your test:
  *
  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  *
  * Or, you can use the -jar option to store the class in the specified JAR file. If a relative
  * path name is given, the JAR file would be relative to the current directory of
  *
  * @run main ClassFileInstaller -jar myjar.jar sun.hotspot.WhiteBox
  */
 public class ClassFileInstaller {
     /**
      * You can enable debug tracing of ClassFileInstaller by running JTREG with
      * jtreg -DClassFileInstaller.debug=true ... <names of tests>
      */
     public static boolean DEBUG = Boolean.getBoolean("ClassFileInstaller.debug");
     /**
      * @param args The names of the classes to dump
      * @throws Exception
      */
     public static void main(String... args) throws Exception {
         if (args.length > 1 && args[0].equals("-jar")) {
             if (args.length < 2) {
                 throw new RuntimeException("Usage: ClassFileInstaller <options> <classes>\n" +
                                            "where possible options include:\n" +
                                            "  -jar <path>             Write to the JAR file <path>");
             }
             writeJar(args[1], null, args, 2, args.length);
         } else {
             if (DEBUG) {
                 System.out.println("ClassFileInstaller: Writing to " + System.getProperty("user.dir"));
             }
             for (String arg : args) {
                 writeClassToDisk(arg);
             }
         }
     }
     public static class Manifest {
         private InputStream in;
         private Manifest(InputStream in) {
             this.in = in;
         }
         static Manifest fromSourceFile(String fileName) throws Exception {
             String pathName = System.getProperty("test.src") + File.separator + fileName;
             return new Manifest(new FileInputStream(pathName));
         }
         // Example:
         //  String manifest = "Premain-Class: RedefineClassHelper\n" +
         //                "Can-Redefine-Classes: true\n";
         //  ClassFileInstaller.writeJar("redefineagent.jar",
         //    ClassFileInstaller.Manifest.fromString(manifest),
         //    "RedefineClassHelper");
         static Manifest fromString(String manifest) throws Exception {
             return new Manifest(new ByteArrayInputStream(manifest.getBytes()));
         }
         public InputStream getInputStream() {
             return in;
         }
     }
     private static void writeJar(String jarFile, Manifest manifest, String classes[], int from, int to) throws Exception {
         if (DEBUG) {
             System.out.println("ClassFileInstaller: Writing to " + getJarPath(jarFile));
         }
         (new File(jarFile)).delete();
         FileOutputStream fos = new FileOutputStream(jarFile);
         ZipOutputStream zos = new ZipOutputStream(fos);
         // The manifest must be the first or second entry. See comments in JarInputStream
         // constructor and JDK-5046178.
         if (manifest != null) {
             writeToDisk(zos, "META-INF/MANIFEST.MF", manifest.getInputStream());
         }
         for (int i=from; i<to; i++) {
             writeClassToDisk(zos, classes[i]);
         }
         zos.close();
         fos.close();
     }
     /*
      * You can call ClassFileInstaller.writeJar() from your main test class instead of
      * using "@run ClassFileInstaller -jar ...". E.g.,
      *
      * String jarPath = ClassFileInstaller.getJarPath("myjar.jar", "sun.hotspot.WhiteBox")
      *
      * If you call this API, make sure you build ClassFileInstaller with the following tags:
      *
      * @library testlibrary
      * @build ClassFileInstaller
      */
     public static String writeJar(String jarFile, String... classes) throws Exception {
         writeJar(jarFile, null, classes, 0, classes.length);
         return getJarPath(jarFile);
     }
     public static String writeJar(String jarFile, Manifest manifest, String... classes) throws Exception {
         writeJar(jarFile, manifest, classes, 0, classes.length);
         return getJarPath(jarFile);
     }
     /**
      * This returns the absolute path to the file specified in "@ClassFileInstaller -jar myjar.jar",
      * In your test program, instead of using the JAR file name directly:
      *
      * String jarPath = "myjar.jar";
      *
      * you should call this function, like:
      *
      * String jarPath = ClassFileInstaller.getJarPath("myjar.jar")
      *
      * The reasons are:
      * (1) Using absolute path makes it easy to cut-and-paste from the JTR file and rerun your
      *     test in any directory.
      * (2) In the future, we may make the JAR file name unique to avoid clobbering
      *     during parallel JTREG execution.
      *
      */
     public static String getJarPath(String jarFileName) {
         return new File(jarFileName).getAbsolutePath();
     }
     public static void writeClassToDisk(String className) throws Exception {
         writeClassToDisk((ZipOutputStream)null, className);
     }
     private static void writeClassToDisk(ZipOutputStream zos, String className) throws Exception {
         writeClassToDisk(zos, className, "");
     }
     public static void writeClassToDisk(String className, String prependPath) throws Exception {
         writeClassToDisk(null, className, prependPath);
     }
     private static void writeClassToDisk(ZipOutputStream zos, String className, String prependPath) throws Exception {
         ClassLoader cl = ClassFileInstaller.class.getClassLoader();
         // Convert dotted class name to a path to a class file
         String pathName = className.replace('.', '/').concat(".class");
         InputStream is = cl.getResourceAsStream(pathName);
         if (is == null) {
             throw new RuntimeException("Failed to find " + pathName);
         }
         if (prependPath.length() > 0) {
             pathName = prependPath + "/" + pathName;
         }
         writeToDisk(zos, pathName, is);
     }
     public static void writeClassToDisk(String className, byte[] bytecode) throws Exception {
         writeClassToDisk(null, className, bytecode);
     }
     private static void writeClassToDisk(ZipOutputStream zos, String className, byte[] bytecode) throws Exception {
         writeClassToDisk(zos, className, bytecode, "");
     }
     public static void writeClassToDisk(String className, byte[] bytecode, String prependPath) throws Exception {
         writeClassToDisk(null, className, bytecode, prependPath);
     }
     private static void writeClassToDisk(ZipOutputStream zos, String className, byte[] bytecode, String prependPath) throws Exception {
         // Convert dotted class name to a path to a class file
         String pathName = className.replace('.', '/').concat(".class");
         if (prependPath.length() > 0) {
             pathName = prependPath + "/" + pathName;
         }
         writeToDisk(zos, pathName, new ByteArrayInputStream(bytecode));
     }
     private static void writeToDisk(ZipOutputStream zos, String pathName, InputStream is) throws Exception {
         if (DEBUG) {
             System.out.println("ClassFileInstaller: Writing " + pathName);
         }
         if (zos != null) {
             ZipEntry ze = new ZipEntry(pathName);
             zos.putNextEntry(ze);
             byte[] buf = new byte[1024];
             int len;
             while ((len = is.read(buf))>0){
                 zos.write(buf, 0, len);
             }
         } else {
             // Create the class file's package directory
             Path p = Paths.get(pathName);
             if (pathName.contains("/")) {
                 Files.createDirectories(p.getParent());
             }
             // Create the class file
             Files.copy(is, p, StandardCopyOption.REPLACE_EXISTING);
         }
         is.close();
     }
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

test/testlibrary/ClassFileInstaller.java@6cfec782c42c (annotated)

test/testlibrary/ClassFileInstaller.java