| /* |
| * Copyright (c) 2018, Red Hat, Inc. All rights reserved. |
| * |
| * 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 TestClassLoaderLeak |
| * @summary Test OOME in due to classloader leak |
| * @key gc |
| * @requires vm.gc.Shenandoah & !vm.graal.enabled |
| * @library /test/lib |
| * @run main TestClassLoaderLeak |
| */ |
| |
| import java.util.*; |
| import java.io.*; |
| import java.nio.*; |
| import java.nio.file.*; |
| |
| import jdk.test.lib.process.OutputAnalyzer; |
| import jdk.test.lib.process.ProcessTools; |
| |
| public class TestClassLoaderLeak { |
| |
| static final int SIZE = 1 * 1024 * 1024; |
| static final int COUNT = 128; |
| |
| static volatile Object sink; |
| |
| static class Dummy { |
| static final int[] PAYLOAD = new int[SIZE]; |
| } |
| |
| static class MyClassLoader extends ClassLoader { |
| final String path; |
| |
| MyClassLoader(String path) { |
| this.path = path; |
| } |
| |
| public Class<?> loadClass(String name) throws ClassNotFoundException { |
| try { |
| File f = new File(path, name + ".class"); |
| if (!f.exists()) { |
| return super.loadClass(name); |
| } |
| |
| Path path = Paths.get(f.getAbsolutePath()); |
| byte[] cls = Files.readAllBytes(path); |
| return defineClass(name, cls, 0, cls.length, null); |
| } catch (IOException e) { |
| throw new ClassNotFoundException(name); |
| } |
| } |
| } |
| |
| static void load(String path) throws Exception { |
| ClassLoader cl = new MyClassLoader(path); |
| Class<Dummy> c = (Class<Dummy>) Class.forName("TestClassLoaderLeak$Dummy", true, cl); |
| if (c.getClassLoader() != cl) { |
| throw new IllegalStateException("Should have loaded by target loader"); |
| } |
| sink = c; |
| } |
| |
| public static void passWith(String... args) throws Exception { |
| testWith(true, args); |
| } |
| |
| public static void failWith(String... args) throws Exception { |
| testWith(false, args); |
| } |
| |
| public static void testWith(boolean shouldPass, String... args) throws Exception { |
| List<String> pbArgs = new ArrayList<>(); |
| pbArgs.add("-Xmx128m"); |
| pbArgs.add("-XX:+UnlockExperimentalVMOptions"); |
| pbArgs.add("-XX:+UnlockDiagnosticVMOptions"); |
| pbArgs.add("-XX:+UseShenandoahGC"); |
| pbArgs.addAll(Arrays.asList(args)); |
| pbArgs.add(TestClassLoaderLeak.class.getName()); |
| pbArgs.add("test"); |
| |
| ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(pbArgs.toArray(new String[0])); |
| |
| OutputAnalyzer analyzer = new OutputAnalyzer(pb.start()); |
| |
| if (shouldPass) { |
| analyzer.shouldHaveExitValue(0); |
| analyzer.shouldNotContain("java.lang.OutOfMemoryError"); |
| analyzer.shouldContain("All good"); |
| } else { |
| analyzer.shouldHaveExitValue(1); |
| analyzer.shouldContain("java.lang.OutOfMemoryError"); |
| analyzer.shouldNotContain("All good"); |
| } |
| } |
| |
| public static void main(String[] args) throws Exception { |
| if (args.length > 0) { |
| String classDir = TestClassLoaderLeak.class.getProtectionDomain().getCodeSource().getLocation().getPath(); |
| for (int c = 0; c < COUNT; c++) { |
| load(classDir); |
| } |
| System.out.println("All good"); |
| return; |
| } |
| |
| String[][][] modeHeuristics = new String[][][] { |
| {{"satb"}, {"adaptive", "compact", "static", "aggressive"}}, |
| {{"iu"}, {"adaptive", "aggressive"}}, |
| {{"passive"}, {"passive"}} |
| }; |
| |
| for (String[][] mh : modeHeuristics) { |
| String mode = mh[0][0]; |
| String[] heuristics = mh[1]; |
| for (String h : heuristics) { |
| // Forceful enabling should work |
| passWith("-XX:ShenandoahGCMode=" + mode, "-XX:ShenandoahGCHeuristics=" + h, "-XX:+ClassUnloading"); |
| passWith("-XX:ShenandoahGCMode=" + mode, "-XX:ShenandoahGCHeuristics=" + h, "-XX:+ClassUnloadingWithConcurrentMark"); |
| |
| // Even when concurrent unloading is disabled, Full GC has to recover |
| passWith("-XX:ShenandoahGCMode=" + mode, "-XX:ShenandoahGCHeuristics=" + h, "-XX:+ClassUnloading", "-XX:-ClassUnloadingWithConcurrentMark"); |
| passWith("-XX:ShenandoahGCMode=" + mode, "-XX:ShenandoahGCHeuristics=" + h, "-XX:+ClassUnloading", "-XX:-ClassUnloadingWithConcurrentMark", "-XX:ShenandoahUnloadClassesFrequency=0"); |
| passWith("-XX:ShenandoahGCMode=" + mode, "-XX:ShenandoahGCHeuristics=" + h, "-XX:+ClassUnloading", "-XX:+ClassUnloadingWithConcurrentMark", "-XX:ShenandoahUnloadClassesFrequency=0"); |
| |
| // Should OOME when unloading forcefully disabled, even if local flags try to enable it back |
| failWith("-XX:ShenandoahGCMode=" + mode, "-XX:ShenandoahGCHeuristics=" + h, "-XX:-ClassUnloading"); |
| failWith("-XX:ShenandoahGCMode=" + mode, "-XX:ShenandoahGCHeuristics=" + h, "-XX:-ClassUnloading", "-XX:+ClassUnloadingWithConcurrentMark"); |
| failWith("-XX:ShenandoahGCMode=" + mode, "-XX:ShenandoahGCHeuristics=" + h, "-XX:-ClassUnloading", "-XX:+ClassUnloadingWithConcurrentMark", "-XX:ShenandoahUnloadClassesFrequency=1"); |
| failWith("-XX:ShenandoahGCMode=" + mode, "-XX:ShenandoahGCHeuristics=" + h, "-XX:-ClassUnloading", "-XX:-ClassUnloadingWithConcurrentMark", "-XX:ShenandoahUnloadClassesFrequency=1"); |
| } |
| } |
| } |
| } |