97 lines
4.2 KiB
Java
97 lines
4.2 KiB
Java
/*
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* Copyright (c) 2018, 2021, 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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/*
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* @test
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* @summary Use a shared string allocated in a humongous G1 region.
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* @comment -- the following implies that G1 is used (by command-line or by default)
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* @requires vm.cds.write.archived.java.heap
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*
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* @library /test/hotspot/jtreg/runtime/cds/appcds /test/lib
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* @build HelloString
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* @build sun.hotspot.WhiteBox
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* @run driver jdk.test.lib.helpers.ClassFileInstaller sun.hotspot.WhiteBox
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* @run main/othervm -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:. SharedStringsHumongous
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*/
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.OutputStreamWriter;
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import java.io.PrintWriter;
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import sun.hotspot.WhiteBox;
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import jdk.test.lib.cds.CDSTestUtils;
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import jdk.test.lib.process.OutputAnalyzer;
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import jdk.test.lib.process.ProcessTools;
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import jdk.test.lib.Asserts;
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public class SharedStringsHumongous {
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static String sharedArchiveConfigFile = CDSTestUtils.getOutputDir() + File.separator + "SharedStringsHumongous_gen.txt";
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public static void main(String[] args) throws Exception {
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WhiteBox wb = WhiteBox.getWhiteBox();
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try (FileOutputStream fos = new FileOutputStream(sharedArchiveConfigFile)) {
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PrintWriter out = new PrintWriter(new OutputStreamWriter(fos));
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out.println("VERSION: 1.0");
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out.println("@SECTION: String");
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out.println("31: shared_test_string_unique_14325");
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int region_size = wb.g1RegionSize();
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char body[] = new char[region_size + region_size / 2];
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for (int i = 0; i < body.length; i++) {
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body[i] = 'x';
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}
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Asserts.assertTrue(wb.g1IsHumongous(body));
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String prefix = "generated_string (followed by " + body.length + " 'x') ";
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System.out.println("G1 region size: " + region_size);
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System.out.println("Using a humongous string: " + prefix);
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String s = prefix + new String(body);
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out.println(s.length() + ": " + s);
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out.close();
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}
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SharedStringsUtils.run(args, SharedStringsHumongous::test);
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}
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public static void test(String[] args) throws Exception {
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String vmOptionsPrefix[] = SharedStringsUtils.getChildVMOptionsPrefix();
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String appJar = JarBuilder.build("SharedStringsHumongous", "HelloString");
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OutputAnalyzer dumpOutput = TestCommon.dump(appJar, TestCommon.list("HelloString"),
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TestCommon.concat(vmOptionsPrefix,
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"-XX:SharedArchiveConfigFile=" + sharedArchiveConfigFile,
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"-Xlog:gc+region+cds",
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"-Xlog:gc+region=trace"));
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TestCommon.checkDump(dumpOutput, "extra interned string ignored; size too large");
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// Extra strings that are humongous are not kelp alive, so they should be GC'ed
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// before dumping the string table. That means the heap should contain no
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// humongous regions.
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dumpOutput.shouldNotMatch("gc,region,cds. HeapRegion 0x[0-9a-f]* HUM");
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OutputAnalyzer execOutput = TestCommon.exec(appJar,
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TestCommon.concat(vmOptionsPrefix, "HelloString"));
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TestCommon.checkExec(execOutput);
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}
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}
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