1 /* 2 * Copyright (c) 2017, 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 * @bug 8174749 8213307 27 * @summary MemberNameTable should reuse entries 28 * @requires vm.gc == "null" 29 * @library /test/lib 30 * @build sun.hotspot.WhiteBox 31 * @run driver ClassFileInstaller sun.hotspot.WhiteBox sun.hotspot.WhiteBox$WhiteBoxPermission 32 * @run main/othervm -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:. MemberNameLeak 33 */ 34 35 import java.lang.invoke.*; 36 import jdk.test.lib.process.OutputAnalyzer; 37 import jdk.test.lib.process.ProcessTools; 38 import sun.hotspot.WhiteBox; 39 import sun.hotspot.code.Compiler; 40 import sun.hotspot.gc.GC; 41 42 public class MemberNameLeak { 43 static class Leak { 44 public void callMe() { 45 } 46 47 public static void main(String[] args) throws Throwable { 48 Leak leak = new Leak(); 49 WhiteBox wb = WhiteBox.getWhiteBox(); 50 int removedCountOrig = wb.resolvedMethodRemovedCount(); 51 int removedCount; 52 53 for (int i = 0; i < 10; i++) { 54 MethodHandles.Lookup lookup = MethodHandles.lookup(); 55 MethodType mt = MethodType.fromMethodDescriptorString("()V", Leak.class.getClassLoader()); 56 // findSpecial leaks some native mem 57 MethodHandle mh = lookup.findSpecial(Leak.class, "callMe", mt, Leak.class); 58 mh.invokeExact(leak); 59 } 60 61 // Wait until ServiceThread cleans ResolvedMethod table 62 int cnt = 0; 63 while (true) { 64 if (cnt++ % 30 == 0) { 65 System.gc(); // make mh unused 66 } 67 removedCount = wb.resolvedMethodRemovedCount(); 68 if (removedCountOrig != removedCount) { 69 break; 70 } 71 Thread.sleep(100); 72 } 73 } 74 } 75 76 public static void test(String gc, boolean doConcurrent) throws Throwable { 77 // Run this Leak class with logging 78 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 79 "-Xlog:membername+table=trace", 80 "-XX:+UnlockExperimentalVMOptions", 81 "-XX:+UnlockDiagnosticVMOptions", 82 "-XX:+WhiteBoxAPI", 83 "-Xbootclasspath/a:.", 84 doConcurrent ? "-XX:+ExplicitGCInvokesConcurrent" : "-XX:-ExplicitGCInvokesConcurrent", 85 "-XX:+ClassUnloading", 86 "-XX:+ClassUnloadingWithConcurrentMark", 87 gc, Leak.class.getName()); 88 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 89 output.shouldContain("ResolvedMethod entry added for MemberNameLeak$Leak.callMe()V"); 90 output.shouldContain("ResolvedMethod entry found for MemberNameLeak$Leak.callMe()V"); 91 output.shouldContain("ResolvedMethod entry removed"); 92 output.shouldHaveExitValue(0); 93 } 94 95 public static void main(java.lang.String[] unused) throws Throwable { 96 test("-XX:+UseG1GC", false); 97 test("-XX:+UseG1GC", true); 98 99 test("-XX:+UseParallelGC", false); 100 test("-XX:+UseSerialGC", false); 101 if (!Compiler.isGraalEnabled()) { // Graal does not support CMS 102 test("-XX:+UseConcMarkSweepGC", false); 103 test("-XX:+UseConcMarkSweepGC", true); 104 if (GC.Shenandoah.isSupported()) { 105 test("-XX:+UseShenandoahGC", true); 106 test("-XX:+UseShenandoahGC", false); 107 } 108 } 109 } 110 }