1 /*
   2  * Copyright (c) 2020, 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 import java.io.ByteArrayOutputStream;
  25 import java.io.File;
  26 import java.io.FileInputStream;
  27 
  28 import java.lang.invoke.MethodHandles;
  29 import java.lang.invoke.MethodHandles.Lookup;
  30 
  31 import java.nio.file.Path;
  32 import java.nio.file.Paths;
  33 
  34 import jdk.test.lib.compiler.CompilerUtils;
  35 import jdk.test.lib.Utils;
  36 
  37 
  38 interface Test {
  39     void test();
  40 }
  41 
  42 public class HiddenClassApp {
  43     static void log(String str) { System.out.println(str); }
  44 
  45     static final String HCName = "HiddenClass.java";
  46     static final Path SRC_DIR = Paths.get(Utils.TEST_SRC, "hidden");
  47     static final Path CLASSES_DIR = Paths.get(Utils.TEST_CLASSES, "hidden");
  48 
  49     static void compileSources(String sourceFile) throws Throwable {
  50         boolean ok = CompilerUtils.compile(SRC_DIR.resolve(sourceFile), CLASSES_DIR,
  51                                            "-cp", Utils.TEST_CLASSES.toString());
  52         if (!ok){
  53             throw new RuntimeException("HiddenClassApp: Compilation of the test failed. ");
  54         }
  55     }
  56 
  57     static byte[] readClassFile(String classFileName) throws Exception {
  58         File classFile = new File(CLASSES_DIR + File.separator + classFileName);
  59         try (FileInputStream in = new FileInputStream(classFile);
  60              ByteArrayOutputStream out = new ByteArrayOutputStream())
  61         {
  62             int b;
  63             while ((b = in.read()) != -1) {
  64                 out.write(b);
  65             }
  66             return out.toByteArray();
  67         }
  68     }
  69 
  70     static Class<?> defineHiddenClass(String name) throws Exception {
  71         Lookup lookup = MethodHandles.lookup();
  72         byte[] bytes = readClassFile(name + ".class");
  73         Class<?> hc = lookup.defineHiddenClass(bytes, false).lookupClass();
  74         return hc;
  75     }
  76 
  77     public static void main(String args[]) throws Exception {
  78         log("HiddenClassApp: started");
  79         try {
  80             compileSources(HCName);
  81             log("HiddenClassApp: compiled " + HCName);
  82         } catch (Throwable t) {
  83             t.printStackTrace();
  84             throw new Exception("HiddenClassApp: Failed to compile " + HCName);
  85         }
  86 
  87         Class<?> c = defineHiddenClass("HiddenClass");
  88         log("HiddenClassApp: Defined HiddenClass with name: " + c.getName());
  89         HiddenClassAgent.setHiddenClassLoaded();
  90 
  91         Test t = (Test) c.newInstance();
  92         t.test();
  93         log("HiddenClassApp: Tested HiddenClass");
  94 
  95         if (!HiddenClassAgent.checkWaitForCompleteness()) {
  96             throw new Exception("HiddenClassApp: FAIL: HiddenClassAgent did not complete");
  97         }
  98         if (HiddenClassAgent.failed()) {
  99             throw new Exception("HiddenClassApp: FAIL: HiddenClassAgent failed");
 100         }
 101         log("HiddenClassApp: finished");
 102     }
 103 }