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/util/logging/LoggingDeadlock4.java
+++ b/test/jdk/java/util/logging/LoggingDeadlock4.java
@ -0,0 +1,107 @@
+/*
+ * Copyright (c) 2011, 2016, 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     6977677 8004928
+ * @summary Deadlock between LogManager.<clinit> and Logger.getLogger()
+ * @author  Daniel D. Daugherty
+ * @modules java.base/sun.util.logging
+ *          java.logging
+ * @compile -XDignore.symbol.file LoggingDeadlock4.java
+ * @run main/othervm/timeout=15 LoggingDeadlock4
+ */
+
+import java.util.concurrent.CountDownLatch;
+import java.util.logging.LogManager;
+import java.util.logging.Logger;
+
+public class LoggingDeadlock4 {
+    private static CountDownLatch barrier      = new CountDownLatch(1);
+    private static CountDownLatch lmIsRunning  = new CountDownLatch(1);
+    private static CountDownLatch logIsRunning = new CountDownLatch(1);
+
+    // Create a sun.util.logging.PlatformLogger$JavaLogger object
+    // that has to be redirected when the LogManager class
+    // is initialized. This can cause a deadlock between
+    // LogManager.<clinit> and Logger.getLogger().
+    private static final sun.util.logging.PlatformLogger log =
+        sun.util.logging.PlatformLogger.getLogger("java.util.logging");
+
+    public static void main(String[] args) {
+        System.out.println("main: LoggingDeadlock4 is starting.");
+
+        Thread lmThread = new Thread("LogManagerThread") {
+            public void run() {
+                // let main know LogManagerThread is running
+                lmIsRunning.countDown();
+
+                System.out.println(Thread.currentThread().getName()
+                    + ": is running.");
+
+                try {
+                    barrier.await();  // wait for race to start
+                } catch (InterruptedException e) {
+                }
+
+                LogManager.getLogManager();
+            }
+        };
+        lmThread.start();
+
+        Thread logThread = new Thread("LoggerThread") {
+            public void run() {
+                // let main know LoggerThread is running
+                logIsRunning.countDown();
+
+                System.out.println(Thread.currentThread().getName()
+                    + ": is running.");
+
+                try {
+                    barrier.await();  // wait for race to start
+                } catch (InterruptedException e) {
+                }
+
+                Logger.getLogger("foo logger");
+            }
+        };
+        logThread.start();
+
+        try {
+            // wait for LogManagerThread and LoggerThread to get going
+            lmIsRunning.await();
+            logIsRunning.await();
+        } catch (InterruptedException e) {
+        }
+
+        barrier.countDown();  // start the race
+
+        try {
+            lmThread.join();
+            logThread.join();
+        } catch (InterruptedException ie) {
+        }
+
+        System.out.println("main: LoggingDeadlock4 is done.");
+    }
+}