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/nio/channels/Selector/SelectorLimit.java
+++ b/test/jdk/java/nio/channels/Selector/SelectorLimit.java
@ -0,0 +1,98 @@
+/*
+ * Copyright (c) 2002, 2013, 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 4777504 8024883
+ * @summary Ensure that a Selector can return at least 100 selected keys
+ * @author Mark Reinhold
+ * @library ..
+ * @build SelectorLimit
+ * @run main/othervm SelectorLimit
+ * @run main/othervm -Dsun.nio.ch.maxUpdateArraySize=128 SelectorLimit
+ */
+
+import java.io.*;
+import java.net.*;
+import java.nio.*;
+import java.nio.channels.*;
+import java.util.*;
+
+
+public class SelectorLimit {
+
+    static PrintStream log = System.err;
+
+    static class Listener
+        extends TestThread
+    {
+        volatile int count = 0;
+        private ServerSocketChannel ssc;
+
+        Listener(ServerSocketChannel ssc) {
+            super("Listener");
+            this.ssc = ssc;
+        }
+
+        void go() throws IOException {
+            for (;;) {
+                ssc.accept();
+                count++;
+            }
+        }
+
+    }
+
+    static final int N_KEYS = 500;
+    static final int MIN_KEYS = 100;
+
+    public static void main(String[] args) throws Exception {
+        ServerSocketChannel ssc = ServerSocketChannel.open();
+        TestUtil.bind(ssc);
+        Listener lth = new Listener(ssc);
+        lth.start();
+
+        Selector sel = Selector.open();
+        SocketChannel[] sca = new SocketChannel[N_KEYS];
+        for (int i = 0; i < N_KEYS; i++) {
+            SocketChannel sc = SocketChannel.open();
+            sc.configureBlocking(false);
+            sc.register(sel, SelectionKey.OP_CONNECT | SelectionKey.OP_WRITE);
+            sc.connect(ssc.socket().getLocalSocketAddress());
+        }
+
+        for (int i = 0; i < 10; i++) {
+            if (lth.count >= MIN_KEYS)
+                break;
+            Thread.sleep(1000);
+        }
+        log.println(lth.count + " connections accepted");
+        Thread.sleep(500);
+
+        int n = sel.select();
+        log.println(n + " keys selected");
+        if (n < MIN_KEYS)
+            throw new Exception("Only selected " + n + " keys");
+
+    }
+
+}