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