| /* |
| * Copyright (c) 2007, 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. |
| */ |
| |
| /* |
| * @test |
| * |
| * @summary converted from VM Testbase nsk/jdi/ReferenceType/instances/instances003. |
| * VM Testbase keywords: [jpda, jdi, feature_jdk6_jpda, vm6] |
| * VM Testbase readme: |
| * DESCRIPTION |
| * The test scenario is following: |
| * - Debugger VM |
| * for refererence_type in <Strong, JNI_Local_Ref, JNI_Global_Ref, JNI_Weak_Ref, PhantomReference, SoftReference, WeakReference> |
| * - initiate creation test class instances of type 'refererence_type' in debuggee VM |
| * - prevent some instances from being garbage collected using ObjectReference.disableCollection |
| * - initiate GarbageCollection in Debuggee VM |
| * - check the number of instances is left is correct |
| * - enables Garbage Collection for instances for which it were previously disabled using ObjectReference.enableCollection |
| * - initiate GarbageCollection in Debuggee VM |
| * - check the number of instances is 0 |
| * done |
| * Test is executed for following sublcasses of ObjectReference: StringReference, ThreadReference, ClassLoaderReference |
| * |
| * @requires vm.gc != "Z" |
| * @library /vmTestbase |
| * /test/lib |
| * @run driver jdk.test.lib.FileInstaller . . |
| * @build nsk.jdi.ReferenceType.instances.instances003.instances003 |
| * @run main/othervm/native PropertyResolvingWrapper |
| * nsk.jdi.ReferenceType.instances.instances003.instances003 |
| * -verbose |
| * -arch=${os.family}-${os.simpleArch} |
| * -waittime=5 |
| * -debugee.vmkind=java |
| * -transport.address=dynamic |
| * "-debugee.vmkeys=-Xmx128M ${test.vm.opts} ${test.java.opts}" |
| * -testClassNames nsk.jdi.ReferenceType.instances.instances003.instances003$TestClassLoader:java.lang.String:java.lang.Thread |
| */ |
| |
| package nsk.jdi.ReferenceType.instances.instances003; |
| |
| import java.io.PrintStream; |
| import java.util.*; |
| |
| import com.sun.jdi.ObjectReference; |
| import com.sun.jdi.ReferenceType; |
| |
| import nsk.share.Consts; |
| import nsk.share.ObjectInstancesManager; |
| import nsk.share.TestBug; |
| import nsk.share.jdi.HeapwalkingDebuggee; |
| import nsk.share.jdi.HeapwalkingDebugger; |
| import nsk.share.jpda.AbstractDebuggeeTest; |
| |
| public class instances003 extends HeapwalkingDebugger { |
| // use subclass of java.lang.ClassLoader to be sure that there are no its instances in debuggee VM |
| public static class TestClassLoader extends ClassLoader { |
| |
| } |
| |
| private String testClasses[]; |
| |
| protected String[] doInit(String[] args, PrintStream out) { |
| args = super.doInit(args, out); |
| |
| ArrayList<String> standardArgs = new ArrayList<String>(); |
| |
| for (int i = 0; i < args.length; i++) { |
| if (args[i].equals("-testClassNames") && (i < args.length - 1)) { |
| testClasses = args[i + 1].split(":"); |
| |
| i++; |
| } else |
| standardArgs.add(args[i]); |
| } |
| |
| if ((testClasses == null) || (testClasses.length == 0)) |
| throw new TestBug("Test class names was not specified, use test parameter '-testClassNames'"); |
| |
| return standardArgs.toArray(new String[] {}); |
| } |
| |
| public static void main(String argv[]) { |
| System.exit(run(argv, System.out) + Consts.JCK_STATUS_BASE); |
| } |
| |
| public static int run(String argv[], PrintStream out) { |
| return new instances003().runIt(argv, out); |
| } |
| |
| protected String debuggeeClassName() { |
| return nsk.share.jdi.HeapwalkingDebuggee.class.getName(); |
| } |
| |
| protected void testClass(String className, String referrerType) { |
| final int createInstanceCount = 50; |
| final int referrerCount = 1; |
| |
| List<ObjectReference> objectsToFilter = HeapwalkingDebugger.getObjectReferences(className, vm); |
| |
| // create 'createInstanceCount' instances of test class |
| |
| // create temporary strong references to prevent the weakly referred instances being GCed |
| // during the time between creating them and disabling collection on them |
| pipe.println(HeapwalkingDebuggee.COMMAND_CREATE_INSTANCES + ":" + className + ":" + createInstanceCount + |
| ":" + referrerCount + ":" + referrerType + |
| (referrerType.equals(ObjectInstancesManager.WEAK_REFERENCE) ? "|" + ObjectInstancesManager.STRONG_REFERENCE : "")); |
| |
| // Note! This test is broken, in the sense that it incorrectly assumes |
| // that no GC can happen before it walks the heap. In practice, it seems |
| // to only affect this test when using ZGC. However, this test will also |
| // fail when using other GCs if an explicit GC is done here. |
| |
| // the instance counts should not be affected by creating multiple references |
| checkDebugeeAnswer_instanceCounts(className, createInstanceCount, objectsToFilter); |
| |
| ReferenceType referenceType = debuggee.classByName(className); |
| List<ObjectReference> instances = HeapwalkingDebugger.filterObjectReferrence(objectsToFilter, referenceType.instances(0)); |
| |
| for (ObjectReference or : instances) { |
| or.disableCollection(); |
| } |
| |
| // remove the temporary strong references so the weak references can be properly tested |
| if (referrerType.equals(ObjectInstancesManager.WEAK_REFERENCE)) { |
| pipe.println(HeapwalkingDebuggee.COMMAND_DELETE_REFERRERS + ":" + className + ":" + referrerCount + ":" + ObjectInstancesManager.STRONG_REFERENCE); |
| if (!isDebuggeeReady()) { |
| return; |
| } |
| } |
| |
| // prevent half of instances from GC, delete references and force GC |
| |
| int preventGCCount = createInstanceCount / 2; |
| |
| for (int i = 0; i < preventGCCount; i++) { |
| instances.get(i).enableCollection(); |
| } |
| |
| pipe.println(HeapwalkingDebuggee.COMMAND_DELETE_INSTANCES + ":" + className + ":" + createInstanceCount); |
| |
| if (!isDebuggeeReady()) |
| return; |
| |
| pipe.println(AbstractDebuggeeTest.COMMAND_FORCE_GC); |
| |
| checkDebugeeAnswer_instanceCounts(className, createInstanceCount - preventGCCount, objectsToFilter); |
| |
| // enable garbage collection for all instances and force GC |
| |
| for (ObjectReference reference : referenceType.instances(0)) { |
| reference.enableCollection(); |
| } |
| |
| pipe.println(AbstractDebuggeeTest.COMMAND_FORCE_GC); |
| |
| checkDebugeeAnswer_instanceCounts(className, 0, objectsToFilter); |
| } |
| |
| protected void doTest() { |
| for (String referenceType : HeapwalkingDebuggee.includedIntoInstancesCountTypes) { |
| for (String className : testClasses) |
| testClass(className, referenceType); |
| } |
| } |
| } |