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.

test/jdk/java/lang/Thread/StartOOMTest.java

@@ -0,0 +1,93 @@
+/*
+ * Copyright (c) 2007, 2011, 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.
+ */
+
+/*
+ * This test is relatively useful for verifying 6379235, but
+ * is too resource intensive, especially on 64 bit systems,
+ * to be run automatically, see 6721694.
+ *
+ * When run it should be typically be run with the server vm
+ * and a relatively small java heap, and a large stack size
+ * ( to provoke the OOM quicker ).
+ *    java -server -Xmx32m -Xms32m -Xss256m StartOOMTest
+ */
+
+import java.util.*;
+
+public class StartOOMTest
+{
+    public static void main(String[] args) throws Throwable {
+        Runnable r = new SleepRunnable();
+        ThreadGroup tg = new ThreadGroup("buggy");
+        List<Thread> threads = new ArrayList<Thread>();
+        Thread failedThread;
+        int i = 0;
+        for (i = 0; ; i++) {
+            Thread t = new Thread(tg, r);
+            try {
+                t.start();
+                threads.add(t);
+            } catch (Throwable x) {
+                failedThread = t;
+                System.out.println(x);
+                System.out.println(i);
+                break;
+            }
+        }
+
+        int j = 0;
+        for (Thread t : threads)
+            t.interrupt();
+
+        while (tg.activeCount() > i/2)
+            Thread.yield();
+        failedThread.start();
+        failedThread.interrupt();
+
+        for (Thread t : threads)
+            t.join();
+        failedThread.join();
+
+        try {
+            Thread.sleep(1000);
+        } catch (Throwable ignore) {
+        }
+
+        int activeCount = tg.activeCount();
+        System.out.println("activeCount = " + activeCount);
+
+        if (activeCount > 0) {
+            throw new RuntimeException("Failed: there  should be no active Threads in the group");
+        }
+    }
+
+    static class SleepRunnable implements Runnable
+    {
+        public void run() {
+            try {
+                Thread.sleep(60*1000);
+            } catch (Throwable t) {
+            }
+        }
+    }
+}