1 /* 2 * Copyright (c) 2007, 2018, 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 * @test 26 * 27 * @summary converted from VM Testbase nsk/jdi/ObjectReference/referringObjects/referringObjects002. 28 * VM Testbase keywords: [quick, jpda, jdi, feature_jdk6_jpda, vm6] 29 * VM Testbase readme: 30 * DESCRIPTION 31 * Test check behaviour of ObjectReference.referringObjects, ObjectReference.disableCollection and 32 * ObjectReference.enableCollection for ClassObjectReference 33 * The test scenario is following: 34 * - Debugger VM 35 * - initiate in target VM loading of test class: 36 * - Debugee VM 37 * - create several instances of loaded class 38 * - create references of all possible types to loaded class 39 * - Debugger VM 40 * - check test class have correct number of referrers 41 * (class object referrers should include class instances and references with supported types: Strong, PhantomReference, SoftReference, WeakReference) 42 * - Debugger VM 43 * - initiate in debuggee removing of class instances and class object references 44 * - check test class have correct number of referrers 45 * - Debugger VM 46 * - prevent collection of class object using ObjectReference.disableCollection 47 * - initiate test class unloading in debugee VM 48 * - check class object was not collected 49 * - enable collection of class object using ObjectReference.enableCollection 50 * - check class object was collected 51 * 52 * @requires vm.opt.final.ClassUnloading 53 * @library /vmTestbase 54 * /test/lib 55 * @run driver jdk.test.lib.FileInstaller . . 56 * @build nsk.jdi.ObjectReference.referringObjects.referringObjects002.referringObjects002 57 * nsk.jdi.ObjectReference.referringObjects.referringObjects002.referringObjects002a 58 * nsk.share.jdi.TestClass1 59 * @run main/othervm/native PropertyResolvingWrapper 60 * nsk.jdi.ObjectReference.referringObjects.referringObjects002.referringObjects002 61 * -verbose 62 * -arch=${os.family}-${os.simpleArch} 63 * -waittime=5 64 * -debugee.vmkind=java 65 * -transport.address=dynamic 66 * "-debugee.vmkeys=-Xmx256M ${test.vm.opts} ${test.java.opts}" 67 * -testClassPath ${test.class.path} 68 */ 69 70 package nsk.jdi.ObjectReference.referringObjects.referringObjects002; 71 72 import java.io.PrintStream; 73 import com.sun.jdi.*; 74 import nsk.share.Consts; 75 import nsk.share.TestBug; 76 import nsk.share.jdi.HeapwalkingDebuggee; 77 import nsk.share.jdi.HeapwalkingDebugger; 78 79 public class referringObjects002 extends HeapwalkingDebugger { 80 main(String argv[])81 public static void main(String argv[]) { 82 System.exit(run(argv, System.out) + Consts.JCK_STATUS_BASE); 83 } 84 run(String argv[], PrintStream out)85 public static int run(String argv[], PrintStream out) { 86 return new referringObjects002().runIt(argv, out); 87 } 88 debuggeeClassName()89 protected String debuggeeClassName() { 90 if (classpath == null) { 91 throw new TestBug("Debugger requires 'testClassPath' parameter"); 92 } 93 94 return nsk.jdi.ObjectReference.referringObjects.referringObjects002.referringObjects002a.class.getName() + 95 " -testClassPath " + classpath; 96 } 97 checkClassObjectReferrersCount(ClassObjectReference classObjectReference, int expectedCount)98 public void checkClassObjectReferrersCount(ClassObjectReference classObjectReference, int expectedCount) { 99 int referrersCount = classObjectReference.referringObjects(0).size(); 100 101 if (referrersCount != expectedCount) { 102 setSuccess(false); 103 log.complain("Unexpected size of ClassLoaderReference.referringObjects: " + referrersCount + ", expected: " + expectedCount); 104 } 105 } 106 doTest()107 protected void doTest() { 108 String className = "nsk.share.jdi.TestClass1"; 109 110 int createInstances = 10; 111 112 pipe.println(HeapwalkingDebuggee.COMMAND_LOAD_CLASS + ":" + className + ":" + createInstances); 113 114 if (!isDebuggeeReady()) 115 return; 116 117 // each class instances has reference to class object + 118 // + 'includedIntoReferrersCountTypes.size()' referrers was additionally created 119 // +1 referrer is classloader 120 // +1 referrer is debugee class unloader 121 // +1 self-reference from this_class index 122 int expectedReferrersCount = createInstances + HeapwalkingDebuggee.includedIntoReferrersCountTypes.size() + 3; 123 124 ClassObjectReference classObjectReference = debuggee.classByName(className).classObject(); 125 126 checkClassObjectReferrersCount(classObjectReference, expectedReferrersCount); 127 128 pipe.println(referringObjects002a.COMMAND_DELETE_CLASS_OBJECT_REFERRERS); 129 130 if (!isDebuggeeReady()) 131 return; 132 133 // Only this referrers should left: 134 // 1 referrer is classloader 135 // 1 referrer is debugee class unloader 136 // 1 self-reference from this_class index 137 expectedReferrersCount = 3; 138 139 checkClassObjectReferrersCount(classObjectReference, expectedReferrersCount); 140 141 // disable collection and try unload class object 142 classObjectReference.disableCollection(); 143 144 pipe.println(HeapwalkingDebuggee.COMMAND_UNLOAD_CLASS + ":" + className + ":" + HeapwalkingDebuggee.UNLOAD_RESULT_FALSE); 145 146 if (!isDebuggeeReady()) 147 return; 148 149 try { 150 classObjectReference.referringObjects(0); 151 } catch (ObjectCollectedException e) { 152 setSuccess(false); 153 log.complain("Class object was collected after disableCollection"); 154 return; 155 } 156 157 // enable collection and try unload class object 158 classObjectReference.enableCollection(); 159 160 pipe.println(HeapwalkingDebuggee.COMMAND_UNLOAD_CLASS + ":" + className); 161 162 if (!isDebuggeeReady()) 163 return; 164 165 try { 166 classObjectReference.referringObjects(0); 167 } catch (ObjectCollectedException expectedException) { 168 // expected exception 169 return; 170 } 171 172 setSuccess(false); 173 log.complain("Class object was not collected after enableCollection"); 174 } 175 } 176