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undefect. CWE-407 — 63 sites patched across 27 ecosystems

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Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com

Patches, unit tests, benchmarks, whitepaper, and outreach briefs.
Public domain — no copyright claimed. Use freely.
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russell@unturf.com 2026-03-26 17:11:57 -04:00
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test/hotspot/jtreg/gc/TestAllocateHeapAtMultiple.java Normal file
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/*
* Copyright (c) 2017, 2024, 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
* questions.
*/
package gc;
/* @test TestAllocateHeapAtMultiple.java
* @summary Test to check allocation of Java Heap with AllocateHeapAt option. Has multiple sub-tests to cover different code paths.
* @library /test/lib
* @modules java.base/jdk.internal.misc
* @requires vm.bits == "64" & vm.gc != "Z" & os.family != "aix"
* @run driver/timeout=360 gc.TestAllocateHeapAtMultiple
*/
import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.process.OutputAnalyzer;
import java.util.ArrayList;
import java.util.Collections;
public class TestAllocateHeapAtMultiple {
public static void main(String args[]) throws Exception {
ArrayList<String> flags = new ArrayList<>();
String test_dir = System.getProperty("test.dir", ".");
// Extra flags for each of the sub-tests
String[][] extraFlagsList = new String[][] {
{"-Xmx32m", "-Xms32m", "-XX:+UseCompressedOops"}, // 1. With compressedoops enabled.
{"-Xmx32m", "-Xms32m", "-XX:-UseCompressedOops"}, // 2. With compressedoops disabled.
{"-Xmx32m", "-Xms32m", "-XX:HeapBaseMinAddress=3g"}, // 3. With user specified HeapBaseMinAddress.
{"-Xmx32m", "-Xms32m", "-XX:+UseLargePages"}, // 4. Set UseLargePages.
{"-Xmx32m", "-Xms32m", "-XX:+UseNUMA"} // 5. Set UseNUMA.
};
for (String[] extraFlags : extraFlagsList) {
flags.clear();
// Add extra flags specific to the sub-test.
Collections.addAll(flags, extraFlags);
// Add common flags
Collections.addAll(flags, new String[] {"-XX:AllocateHeapAt=" + test_dir,
"-Xlog:gc+heap=info",
"-version"});
OutputAnalyzer output = ProcessTools.executeTestJava(flags);
System.out.println("Output:\n" + output.getOutput());
output.shouldContain("Successfully allocated Java heap at location");
output.shouldHaveExitValue(0);
}
}
}