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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
commit 0a580b313d
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test/jdk/com/sun/management/OperatingSystemMXBean/GetProcessCpuTime.java Normal file
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/*
* Copyright (c) 2003, 2025, 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.
*/
/*
* @test
* @bug 4858522
* @summary Basic unit test of OperatingSystemMXBean.getProcessCpuTime()
* @library /test/lib
* @author Steve Bohne
*/
/*
* This test is just a sanity check and does not check for the correct
* value. The correct value should be checked manually:
* Solaris/Linux:
* 1. In a shell, enter the command: "ps -ef"
* 2. The value (reported in seconds) is in the "TIME" column for the process
* Windows NT/XP/2000:
* 1. Hit Ctrl-Alt-Delete, select Task Manager, select Processes tab
* 2. The value (reported in seconds) is in the "CPU Time" column for the
* process. You may have to add this column via View menu-> Select
* Columns... item.
* Windows 98/ME:
* Not supported.
*/
import com.sun.management.OperatingSystemMXBean;
import java.lang.management.*;
import jdk.test.lib.Platform;
public class GetProcessCpuTime {
private static OperatingSystemMXBean mbean =
(com.sun.management.OperatingSystemMXBean)
ManagementFactory.getOperatingSystemMXBean();
// Careful with these values.
private static final long MIN_TIME_FOR_PASS = 1;
private static final long MAX_TIME_FOR_PASS = Long.MAX_VALUE / 10_000_000;
private static boolean trace = false;
public static void main(String args[]) throws Exception {
if (args.length > 0 && args[0].equals("trace")) {
trace = true;
}
// Consume cpu time
double sum=0;
for (int i=0; i <=2000000; i++) {
sum += i;
sum /= i;
}
long ns = mbean.getProcessCpuTime();
if (ns == -1 && Platform.isWindows()) {
// Some Windows 2019 systems can return -1 for the first few reads.
for (int i = 0; i < 10; i++) {
ns = mbean.getProcessCpuTime();
if (ns != -1) {
break;
}
try {
Thread.sleep(200);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
if (ns == -1) {
throw new RuntimeException("getProcessCpuTime() is not supported");
}
if (trace) {
System.out.println("Process CPU time in ns: " + ns);
}
if (ns < MIN_TIME_FOR_PASS || ns > MAX_TIME_FOR_PASS) {
throw new RuntimeException("Process CPU time " +
"illegal value: " + ns + " ns " +
"(MIN = " + MIN_TIME_FOR_PASS + "; " +
"MAX = " + MAX_TIME_FOR_PASS + ")");
}
System.out.println("Test passed.");
}
}