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

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.
2026-03-26 17:11:57 -04:00 · 2026-03-26 17:11:57 -04:00 · 0a580b313d
commit 0a580b313d
70422 changed files with 17213626 additions and 0 deletions
--- a/test/jdk/java/lang/management/ThreadMXBean/EnableTest.java
+++ b/test/jdk/java/lang/management/ThreadMXBean/EnableTest.java
@ -0,0 +1,138 @@
+/*
+ * Copyright (c) 2003, 2015, 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     4530538
+ * @summary Basic unit test of
+ *          ThreadMXBean.setThreadContentionMonitoringEnabled()
+ *          and ThreadMXBean.setThreadCpuTimeEnabled().
+ * @author  Mandy Chung
+ *
+ * @run main EnableTest
+ */
+
+import java.lang.management.*;
+
+public class EnableTest {
+    private static ThreadMXBean tm = ManagementFactory.getThreadMXBean();
+
+    private static void checkThreadContentionMonitoring(boolean expectedValue)
+        throws Exception {
+        boolean value = tm.isThreadContentionMonitoringEnabled();
+        if (value != expectedValue) {
+             throw new RuntimeException("TEST FAILED: " +
+                 "isThreadContentionMonitoringEnabled() returns " + value +
+                 " but expected to be " + expectedValue);
+        }
+
+    }
+
+    private static void testThreadContentionMonitoring()
+        throws Exception {
+        if (!tm.isThreadContentionMonitoringSupported()) return;
+
+        // Test setThreadContentionMonitoringEnabled()
+        checkThreadContentionMonitoring(false);
+
+        // Check enabled once
+        tm.setThreadContentionMonitoringEnabled(true);
+        checkThreadContentionMonitoring(true);
+
+        // Enable it two more times
+        tm.setThreadContentionMonitoringEnabled(true);
+        checkThreadContentionMonitoring(true);
+
+        tm.setThreadContentionMonitoringEnabled(true);
+
+        // Disable once will globally disable the thread contention monitoring
+        tm.setThreadContentionMonitoringEnabled(false);
+        checkThreadContentionMonitoring(false);
+
+        tm.setThreadContentionMonitoringEnabled(false);
+        checkThreadContentionMonitoring(false);
+
+        tm.setThreadContentionMonitoringEnabled(true);
+        checkThreadContentionMonitoring(true);
+    }
+
+    private static void checkThreadCpuTime(boolean expectedValue)
+        throws Exception {
+        boolean value = tm.isThreadCpuTimeEnabled();
+        if (value != expectedValue) {
+             throw new RuntimeException("TEST FAILED: " +
+                 "isThreadCpuTimeEnabled() returns " + value +
+                 " but expected to be " + expectedValue);
+        }
+    }
+
+    private static void testThreadCpuTime()
+        throws Exception {
+        if (!tm.isThreadCpuTimeSupported()) return;
+
+        // Test setThreadCpuTimeEnabled()
+        if (!tm.isThreadCpuTimeEnabled()) {
+            tm.setThreadCpuTimeEnabled(true);
+            checkThreadCpuTime(true);
+        }
+
+        tm.setThreadCpuTimeEnabled(false);
+        checkThreadCpuTime(false);
+
+        tm.setThreadCpuTimeEnabled(true);
+        checkThreadCpuTime(true);
+
+        tm.setThreadCpuTimeEnabled(true);
+        checkThreadCpuTime(true);
+
+        tm.setThreadCpuTimeEnabled(true);
+
+        // disable globally
+        tm.setThreadCpuTimeEnabled(false);
+        checkThreadCpuTime(false);
+
+        tm.setThreadCpuTimeEnabled(false);
+        checkThreadCpuTime(false);
+
+        tm.setThreadCpuTimeEnabled(true);
+        checkThreadCpuTime(true);
+    }
+
+    public static void main(String args[]) throws Exception {
+        try {
+            testThreadContentionMonitoring();
+            testThreadCpuTime();
+        } finally {
+            // restore the default
+            if (tm.isThreadContentionMonitoringSupported()) {
+                tm.setThreadContentionMonitoringEnabled(false);
+            }
+            if (tm.isThreadCpuTimeSupported()) {
+                tm.setThreadCpuTimeEnabled(false);
+            }
+        }
+
+
+        System.out.println("Test passed.");
+    }
+}