author | ccheung |
Thu, 23 Aug 2018 09:35:09 -0700 | |
changeset 51507 | 3e3764f8fe36 |
parent 48138 | 78b2ecdd3c4b |
permissions | -rw-r--r-- |
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/* |
51507
3e3764f8fe36
8207211: [TESTBUG] Remove excessive output from CDS/AppCDS tests
ccheung
parents:
48138
diff
changeset
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* Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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import java.lang.instrument.ClassFileTransformer; |
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import java.lang.instrument.Instrumentation; |
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import java.lang.instrument.IllegalClassFormatException; |
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import java.security.ProtectionDomain; |
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public class GCDuringDumpTransformer implements ClassFileTransformer { |
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public byte[] transform(ClassLoader loader, String name, Class<?> classBeingRedefined, |
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ProtectionDomain pd, byte[] buffer) throws IllegalClassFormatException { |
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try { |
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makeGarbage(); |
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} catch (Throwable t) { |
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t.printStackTrace(); |
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try { |
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Thread.sleep(200); // let GC to have a chance to run |
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} catch (Throwable t2) {} |
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} |
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return null; |
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} |
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private static Instrumentation savedInstrumentation; |
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public static void premain(String agentArguments, Instrumentation instrumentation) { |
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System.out.println("ClassFileTransformer.premain() is called"); |
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instrumentation.addTransformer(new GCDuringDumpTransformer(), /*canRetransform=*/true); |
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savedInstrumentation = instrumentation; |
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} |
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public static Instrumentation getInstrumentation() { |
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return savedInstrumentation; |
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} |
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public static void agentmain(String args, Instrumentation inst) throws Exception { |
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premain(args, inst); |
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} |
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public static void makeGarbage() { |
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for (int x=0; x<10; x++) { |
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Object[] a = new Object[10000]; |
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} |
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} |
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} |