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test/runtime/Metaspace/FragmentMetaspaceSimple.java@dbb05f6d93c4 (annotated)

test/runtime/Metaspace/FragmentMetaspaceSimple.java

Mon, 28 Jul 2014 15:06:38 -0700

author

fzhinkin

date

Mon, 28 Jul 2014 15:06:38 -0700

changeset 6997

dbb05f6d93c4

parent 0

f90c822e73f8

permissions

-rw-r--r--

8051344: JVM crashed in Compile::start() during method parsing w/ UseRTMDeopt turned on
Summary: call rtm_deopt() only if there were no compilation bailouts before.
Reviewed-by: kvn

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*/
aoqi@0	23
aoqi@0	24	/**
aoqi@0	25	* @test
aoqi@0	26	* @library /runtime/testlibrary
aoqi@0	27	* @library classes
aoqi@0	28	* @build test.Empty ClassUnloadCommon
aoqi@0	29	* @run main/othervm/timeout=200 FragmentMetaspaceSimple
aoqi@0	30	*/
aoqi@0	31
aoqi@0	32	import java.util.ArrayList;
aoqi@0	33
aoqi@0	34	/**
aoqi@0	35	* Test that tries to fragment the native memory used by class loaders.
aoqi@0	36	* Keeps every other class loader alive in order to fragment the memory space
aoqi@0	37	* used to store classes and meta data. Since the memory is probably allocated in
aoqi@0	38	* chunks per class loader this will cause a lot of fragmentation if not handled
aoqi@0	39	* properly since every other chunk will be unused.
aoqi@0	40	*/
aoqi@0	41	public class FragmentMetaspaceSimple {
aoqi@0	42	public static void main(String... args) {
aoqi@0	43	runSimple(Long.valueOf(System.getProperty("time", "80000")));
aoqi@0	44	System.gc();
aoqi@0	45	}
aoqi@0	46
aoqi@0	47	private static void runSimple(long time) {
aoqi@0	48	long startTime = System.currentTimeMillis();
aoqi@0	49	ArrayList<ClassLoader> cls = new ArrayList<>();
aoqi@0	50	for (int i = 0; System.currentTimeMillis() < startTime + time; ++i) {
aoqi@0	51	ClassLoader ldr = ClassUnloadCommon.newClassLoader();
aoqi@0	52	if (i % 1000 == 0) {
aoqi@0	53	cls.clear();
aoqi@0	54	}
aoqi@0	55	// only keep every other class loader alive
aoqi@0	56	if (i % 2 == 1) {
aoqi@0	57	cls.add(ldr);
aoqi@0	58	}
aoqi@0	59	Class<?> c = null;
aoqi@0	60	try {
aoqi@0	61	c = ldr.loadClass("test.Empty");
aoqi@0	62	} catch (ClassNotFoundException ex) {
aoqi@0	63	throw new RuntimeException(ex);
aoqi@0	64	}
aoqi@0	65	c = null;
aoqi@0	66	}
aoqi@0	67	cls = null;
aoqi@0	68	}
aoqi@0	69	}