| /* |
| * Copyright (c) 2018, 2020, 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 |
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| */ |
| |
| /* |
| * @test TestHeapDumpOnOutOfMemoryError |
| * @summary Test verifies that -XX:HeapDumpOnOutOfMemoryError dump heap when OutOfMemory is thrown in heap |
| * @library /test/lib |
| * @run driver TestHeapDumpOnOutOfMemoryError run heap |
| */ |
| |
| import jdk.test.lib.Asserts; |
| import jdk.test.lib.Platform; |
| import jdk.test.lib.classloader.GeneratingClassLoader; |
| import jdk.test.lib.hprof.HprofParser; |
| import jdk.test.lib.process.ProcessTools; |
| import jdk.test.lib.process.OutputAnalyzer; |
| |
| import java.io.File; |
| |
| public class TestHeapDumpOnOutOfMemoryError { |
| |
| public static final String HEAP_OOME = "heap"; |
| public static final String METASPACE_OOME = "metaspace"; |
| |
| public static void main(String[] args) throws Exception { |
| if (args.length == 1) { |
| try { |
| if (args[0].equals(HEAP_OOME)) { |
| Object[] oa = new Object[Integer.MAX_VALUE]; |
| for(int i = 0; i < oa.length; i++) { |
| oa[i] = new Object[Integer.MAX_VALUE]; |
| } |
| } else { |
| GeneratingClassLoader loader = new GeneratingClassLoader(); |
| for (int i = 0; ; i++) { |
| loader.loadClass(loader.getClassName(i)); |
| } |
| } |
| throw new Error("OOME not triggered"); |
| } catch (OutOfMemoryError err) { |
| return; |
| } |
| } |
| test(args[1]); |
| } |
| |
| static void test(String type) throws Exception { |
| String heapdumpFilename = type + ".hprof"; |
| ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+HeapDumpOnOutOfMemoryError", |
| "-XX:HeapDumpPath=" + heapdumpFilename, |
| // Note: When trying to provoke a metaspace OOM we may generate a lot of classes. In debug VMs this |
| // can cause considerable wait times since: |
| // - Compiler Dependencies verification iterates the class tree |
| // - Before exit, the CLDG is checked. |
| // Both verifications show quadratic time or worse wrt to number of loaded classes. Therefore it |
| // makes sense to switch one or both off and limit the metaspace size to something sensible. |
| // Example numbers on a slow ppc64 machine: |
| // MaxMetaspaceSize=64M - ~60-70K classes - ~20min runtime with all verifications |
| // MaxMetaspaceSize=16M - ~12-15K classes - ~12sec runtime with all verifications |
| // MaxMetaspaceSize=16M - ~12-15K classes - VerifyDependencies off - ~3seconds on ppc |
| "-XX:MaxMetaspaceSize=16m", |
| Platform.isDebugBuild() ? "-XX:-VerifyDependencies" : "-Dx", |
| TestHeapDumpOnOutOfMemoryError.class.getName(), type); |
| |
| OutputAnalyzer output = new OutputAnalyzer(pb.start()); |
| output.stdoutShouldNotBeEmpty(); |
| output.shouldContain("Dumping heap to " + type + ".hprof"); |
| File dump = new File(heapdumpFilename); |
| Asserts.assertTrue(dump.exists() && dump.isFile(), |
| "Could not find dump file " + dump.getAbsolutePath()); |
| |
| HprofParser.parse(new File(heapdumpFilename)); |
| System.out.println("PASSED"); |
| } |
| |
| } |