1 /* |
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2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 |
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24 /* |
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25 * @test |
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26 * |
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27 * @build ClassLoaderStatsTest DcmdUtil |
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28 * @run main ClassLoaderStatsTest |
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29 */ |
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30 |
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31 import java.io.BufferedReader; |
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32 import java.io.File; |
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33 import java.io.FileInputStream; |
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34 import java.io.IOException; |
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35 import java.io.StringReader; |
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36 import java.nio.ByteBuffer; |
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37 import java.nio.channels.FileChannel; |
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38 import java.util.regex.Matcher; |
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39 import java.util.regex.Pattern; |
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40 |
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41 public class ClassLoaderStatsTest { |
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42 |
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43 // ClassLoader Parent CLD* Classes ChunkSz BlockSz Type |
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44 // 0x00000007c0215928 0x0000000000000000 0x0000000000000000 0 0 0 org.eclipse.osgi.baseadaptor.BaseAdaptor$1 |
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45 // 0x00000007c0009868 0x0000000000000000 0x00007fc52aebcc80 1 6144 3768 sun.reflect.DelegatingClassLoader |
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46 // 0x00000007c0009868 0x0000000000000000 0x00007fc52b8916d0 1 6144 3688 sun.reflect.DelegatingClassLoader |
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47 // 0x00000007c0009868 0x00000007c0038ba8 0x00007fc52afb8760 1 6144 3688 sun.reflect.DelegatingClassLoader |
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48 // 0x00000007c0009868 0x0000000000000000 0x00007fc52afbb1a0 1 6144 3688 sun.reflect.DelegatingClassLoader |
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49 // 0x0000000000000000 0x0000000000000000 0x00007fc523416070 5019 30060544 29956216 <boot classloader> |
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50 // 455 1210368 672848 + unsafe anonymous classes |
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51 // 0x00000007c016b5c8 0x00000007c0038ba8 0x00007fc52a995000 5 8192 5864 org.netbeans.StandardModule$OneModuleClassLoader |
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52 // 0x00000007c0009868 0x00000007c016b5c8 0x00007fc52ac13640 1 6144 3896 sun.reflect.DelegatingClassLoader |
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53 // ... |
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54 |
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55 static Pattern clLine = Pattern.compile("0x\\p{XDigit}*\\s*0x\\p{XDigit}*\\s*0x\\p{XDigit}*\\s*(\\d*)\\s*(\\d*)\\s*(\\d*)\\s*(.*)"); |
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56 static Pattern anonLine = Pattern.compile("\\s*(\\d*)\\s*(\\d*)\\s*(\\d*)\\s*.*"); |
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57 |
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58 public static DummyClassLoader dummyloader; |
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59 |
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60 public static void main(String arg[]) throws Exception { |
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61 |
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62 // create a classloader and load our special class |
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63 dummyloader = new DummyClassLoader(); |
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64 Class<?> c = Class.forName("TestClass", true, dummyloader); |
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65 if (c.getClassLoader() != dummyloader) { |
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66 throw new RuntimeException("TestClass defined by wrong classloader: " + c.getClassLoader()); |
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67 } |
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68 |
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69 String result = DcmdUtil.executeDcmd("VM.classloader_stats"); |
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70 BufferedReader r = new BufferedReader(new StringReader(result)); |
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71 String line; |
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72 while((line = r.readLine()) != null) { |
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73 Matcher m = clLine.matcher(line); |
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74 if (m.matches()) { |
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75 // verify that DummyClassLoader has loaded 1 class and 1 anonymous class |
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76 if (m.group(4).equals("ClassLoaderStatsTest$DummyClassLoader")) { |
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77 System.out.println("line: " + line); |
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78 if (!m.group(1).equals("1")) { |
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79 throw new Exception("Should have loaded 1 class: " + line); |
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80 } |
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81 checkPositiveInt(m.group(2)); |
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82 checkPositiveInt(m.group(3)); |
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83 |
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84 String next = r.readLine(); |
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85 System.out.println("next: " + next); |
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86 Matcher m1 = anonLine.matcher(next); |
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87 m1.matches(); |
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88 if (!m1.group(1).equals("1")) { |
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89 throw new Exception("Should have loaded 1 anonymous class, but found : " + m1.group(1)); |
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90 } |
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91 checkPositiveInt(m1.group(2)); |
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92 checkPositiveInt(m1.group(3)); |
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93 } |
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94 } |
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95 } |
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96 } |
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97 |
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98 private static void checkPositiveInt(String s) throws Exception { |
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99 if (Integer.parseInt(s) <= 0) { |
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100 throw new Exception("Value should have been > 0: " + s); |
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101 } |
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102 } |
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103 |
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104 public static class DummyClassLoader extends ClassLoader { |
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105 |
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106 public static final String CLASS_NAME = "TestClass"; |
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107 |
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108 static ByteBuffer readClassFile(String name) |
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109 { |
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110 File f = new File(System.getProperty("test.classes", "."), |
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111 name); |
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112 try (FileInputStream fin = new FileInputStream(f); |
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113 FileChannel fc = fin.getChannel()) |
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114 { |
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115 return fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size()); |
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116 } catch (IOException e) { |
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117 throw new RuntimeException("Can't open file: " + name, e); |
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118 } |
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119 } |
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120 |
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121 protected Class<?> loadClass(String name, boolean resolve) |
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122 throws ClassNotFoundException |
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123 { |
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124 Class<?> c; |
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125 if (!"TestClass".equals(name)) { |
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126 c = super.loadClass(name, resolve); |
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127 } else { |
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128 // should not delegate to the system class loader |
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129 c = findClass(name); |
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130 if (resolve) { |
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131 resolveClass(c); |
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132 } |
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133 } |
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134 return c; |
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135 } |
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136 |
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137 protected Class<?> findClass(String name) |
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138 throws ClassNotFoundException |
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139 { |
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140 if (!"TestClass".equals(name)) { |
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141 throw new ClassNotFoundException("Unexpected class: " + name); |
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142 } |
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143 return defineClass(name, readClassFile(name + ".class"), null); |
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144 } |
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145 } /* DummyClassLoader */ |
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146 |
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147 } |
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148 |
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149 class TestClass { |
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150 static { |
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151 // force creation of anonymous class (for the lambdaform) |
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152 Runnable r = () -> System.out.println("Hello"); |
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153 r.run(); |
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154 } |
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155 } |
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