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/text/Format/DateFormat/Bug4407042.java
+++ b/test/jdk/java/text/Format/DateFormat/Bug4407042.java
@ -0,0 +1,129 @@
+/*
+ * Copyright (c) 2001, 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 4407042
+ * @summary Make sure that cloned SimpleDateFormat objects work
+ * independently in multiple threads.
+ * @library /java/text/testlib
+ * @run junit Bug4407042
+ */
+
+import org.junit.jupiter.api.Assumptions;
+import org.junit.jupiter.api.Test;
+
+import java.io.*;
+import java.text.*;
+import java.util.*;
+
+public class Bug4407042 {
+
+    static final String TIME_STRING = "2000/11/18 00:01:00";
+    static final long UTC_LONG = 974534460000L;
+    static SimpleDateFormat masterFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
+    static boolean runrun = true;
+    static int duration = 10;
+
+    @Test
+    void test() {
+        Locale locale = Locale.getDefault();
+        Assumptions.assumeTrue(TestUtils.usesAsciiDigits(locale),
+                locale + " does not use ASCII digits");
+        Assumptions.assumeTrue(TestUtils.usesGregorianCalendar(locale),
+                locale + " does not use a Gregorian calendar");
+
+        masterFormat.setTimeZone(TimeZone.getTimeZone("America/Los_Angeles"));
+        DateParseThread d1 = new DateParseThread();
+        DateFormatThread d2 = new DateFormatThread();
+        d1.start();
+        d2.start();
+        int n = Thread.activeCount();
+        boolean failed = false;
+
+        for (int i = 0; i < duration; i++) {
+            try {
+                Thread.sleep(1000);
+                if (Thread.activeCount() != n) {
+                    failed = true;
+                    break;
+                }
+            } catch (InterruptedException e) {
+            }
+        }
+        runrun = false;
+        try {
+            d1.join();
+            d2.join();
+        } catch (InterruptedException e) {
+        }
+        if (failed) {
+            throw new RuntimeException("Failed");
+        }
+    }
+
+    synchronized static SimpleDateFormat getFormatter() {
+        return (SimpleDateFormat) masterFormat.clone();
+    }
+
+    static class DateParseThread extends Thread {
+        public void run() {
+            SimpleDateFormat sdf = getFormatter();
+            Calendar cal = null;
+
+            try {
+                int i = 0;
+                while (runrun) {
+                    Date date =sdf.parse(TIME_STRING);
+                    long t = date.getTime();
+                    i++;
+                    if (t != UTC_LONG) {
+                        throw new RuntimeException("Parse Error: " + i +
+                                                   " (" + sdf.format(date) + ") " + t +
+                                                   " != " + UTC_LONG);
+                    }
+                }
+            } catch (ParseException e) {
+                e.printStackTrace();
+                throw new RuntimeException("Parse Error");
+            }
+        }
+    }
+
+    static class DateFormatThread extends Thread {
+        public  void run () {
+            SimpleDateFormat sdf = getFormatter();
+            Calendar cal = null;
+
+            int i = 0;
+            while (runrun) {
+                i++;
+                String s = sdf.format(new Date(UTC_LONG));
+                if (!s.equals(TIME_STRING)) {
+                    throw new RuntimeException("Format Error: " + i + " " +
+                                               s + " != " + TIME_STRING);
+                }
+            }
+        }
+    }
+}