1 /* 2 * Copyright (c) 2016, 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 25 /* 26 * @test ClassLoadUnloadTest 27 * @bug 8142506 28 * @library /testlibrary 29 * @run driver ClassLoadUnloadTest 30 */ 31 32 import jdk.test.lib.*; 33 import java.lang.ref.WeakReference; 34 import java.lang.reflect.Method; 35 36 public class ClassLoadUnloadTest { 37 private static OutputAnalyzer out; 38 private static ProcessBuilder pb; 39 private static class ClassUnloadTestMain { 40 41 static String klass = "public class Empty {" 42 + " public void bigLoop(){}" 43 + " public String toString() { return \"nothing\"; } }"; 44 45 public static volatile WeakReference<ByteCodeLoader> clweak; 46 public static byte[] garbage; 47 48 public static void main(String... args) throws Exception { 49 ByteCodeLoader cl = new ByteCodeLoader("Empty", InMemoryJavaCompiler.compile("Empty", klass)); 50 Class<?> c = cl.loadClass("Empty"); 51 Object o = c.newInstance(); 52 Method m = c.getMethod("bigLoop"); 53 54 for ( int i=0; i<10001; i++){ 55 m.invoke(o); 56 } 57 58 clweak = new WeakReference<>(cl); 59 cl = null; c = null; o = null; m = null; 60 while(clweak.get() != null) { 61 garbage = new byte[8192]; 62 System.gc(); 63 } 64 } 65 } 66 67 static void checkFor(String... outputStrings) throws Exception { 68 out = new OutputAnalyzer(pb.start()); 69 for (String s: outputStrings) { 70 out.shouldContain(s); 71 } 72 out.shouldHaveExitValue(0); 73 } 74 75 static void checkAbsent(String... outputStrings) throws Exception { 76 out = new OutputAnalyzer(pb.start()); 77 for (String s: outputStrings) { 78 out.shouldNotContain(s); 79 } 80 out.shouldHaveExitValue(0); 81 } 82 83 public static void main(String... args) throws Exception { 84 85 // (1) -Xlog:classunload=info 86 pb = ProcessTools.createJavaProcessBuilder( 87 "-Xlog:classunload=info", "-Xmx64m", ClassUnloadTestMain.class.getName() 88 ); 89 checkFor("[classunload]", "unloading class"); 90 91 // (2) -Xlog:classunload=trace 92 pb = ProcessTools.createJavaProcessBuilder( 93 "-Xlog:classunload=trace", "-Xmx64m", ClassUnloadTestMain.class.getName() 94 ); 95 checkFor("[classunload]", "making nmethod"); 96 97 // (3) -Xlog:classunload=off 98 pb = ProcessTools.createJavaProcessBuilder( 99 "-Xlog:classunload=off", "-Xmx64m", ClassUnloadTestMain.class.getName() 100 ); 101 checkAbsent("[classunload]"); 102 103 // (4) -XX:+TraceClassUnloading 104 pb = ProcessTools.createJavaProcessBuilder( 105 "-XX:+TraceClassUnloading", "-Xmx64m", ClassUnloadTestMain.class.getName() 106 ); 107 checkFor("[classunload]", "unloading class"); 108 109 // (5) -XX:-TraceClassUnloading 110 pb = ProcessTools.createJavaProcessBuilder( 111 "-XX:-TraceClassUnloading", "-Xmx64m", ClassUnloadTestMain.class.getName() 112 ); 113 checkAbsent("[classunload]"); 114 115 // (6) -Xlog:classload=info 116 pb = ProcessTools.createJavaProcessBuilder( 117 "-Xlog:classload=info", "-Xmx64m", ClassUnloadTestMain.class.getName() 118 ); 119 checkFor("[classload]", "java.lang.Object", "source:"); 120 121 // (7) -Xlog:classload=debug 122 pb = ProcessTools.createJavaProcessBuilder( 123 "-Xlog:classload=debug", "-Xmx64m", ClassUnloadTestMain.class.getName() 124 ); 125 checkFor("[classload]", "java.lang.Object", "source:", "klass:", "super:", "loader:", "bytes:"); 126 127 // (8) -Xlog:classload=off 128 pb = ProcessTools.createJavaProcessBuilder( 129 "-Xlog:classload=off", "-Xmx64m", ClassUnloadTestMain.class.getName() 130 ); 131 checkAbsent("[classload]"); 132 133 // (9) -XX:+TraceClassLoading 134 pb = ProcessTools.createJavaProcessBuilder( 135 "-XX:+TraceClassLoading", "-Xmx64m", ClassUnloadTestMain.class.getName() 136 ); 137 checkFor("[classload]", "java.lang.Object", "source:"); 138 139 // (10) -XX:-TraceClassLoading 140 pb = ProcessTools.createJavaProcessBuilder( 141 "-XX:-TraceClassLoading", "-Xmx64m", ClassUnloadTestMain.class.getName() 142 ); 143 checkAbsent("[classload]"); 144 145 // (11) -verbose:class 146 pb = ProcessTools.createJavaProcessBuilder( 147 "-verbose:class", "-Xmx64m", ClassUnloadTestMain.class.getName() 148 ); 149 checkFor("[classload]", "java.lang.Object", "source:"); 150 checkFor("[classunload]", "unloading class"); 151 152 // (12) -Xlog:classloaderdata=trace 153 pb = ProcessTools.createJavaProcessBuilder( 154 "-Xlog:classloaderdata=trace", "-Xmx64m", ClassUnloadTestMain.class.getName() 155 ); 156 checkFor("[classloaderdata]", "create class loader data"); 157 158 } 159 }