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/concurrent/ExecutorCompletionService/ExecutorCompletionServiceLoops.java
+++ b/test/jdk/java/util/concurrent/ExecutorCompletionService/ExecutorCompletionServiceLoops.java
@ -0,0 +1,121 @@
+/*
+ * 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 file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * Written by Doug Lea with assistance from members of JCP JSR-166
+ * Expert Group and released to the public domain, as explained at
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+/*
+ * @test
+ * @bug 4965960
+ * @summary  Exercise ExecutorCompletionService
+ * @library /test/lib
+ */
+
+import static java.util.concurrent.TimeUnit.MILLISECONDS;
+
+import java.util.concurrent.Callable;
+import java.util.concurrent.ExecutorCompletionService;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import jdk.test.lib.Utils;
+
+public class ExecutorCompletionServiceLoops {
+    static final long LONG_DELAY_MS = Utils.adjustTimeout(10_000);
+    static final int POOLSIZE = 10;
+    static final ExecutorService pool =
+        Executors.newFixedThreadPool(POOLSIZE);
+    static final ExecutorCompletionService<Integer> ecs =
+        new ExecutorCompletionService<>(pool);
+    static boolean print = false;
+
+    public static void main(String[] args) throws Exception {
+        int max = 8;
+        int base = 2000;
+
+        if (args.length > 0)
+            max = Integer.parseInt(args[0]);
+
+        System.out.println("Warmup...");
+        oneTest(base);
+        print = true;
+
+        for (int i = 1; i <= max; i += (i+1) >>> 1) {
+            System.out.print("n: " + i * base);
+            oneTest(i * base);
+        }
+        pool.shutdown();
+        if (! pool.awaitTermination(LONG_DELAY_MS, MILLISECONDS))
+            throw new Error();
+   }
+
+    static class Task implements Callable<Integer> {
+        public Integer call() {
+            int s = 0;
+            int l = System.identityHashCode(this);
+            for (int i = 0; i < 5; ++i) {
+                l = LoopHelpers.compute2(l);
+                s += LoopHelpers.compute1(l);
+            }
+            return new Integer(s);
+        }
+    }
+
+    static class Producer implements Runnable {
+        final ExecutorCompletionService cs;
+        final int iters;
+        Producer(ExecutorCompletionService ecs, int i) {
+            cs = ecs;
+            iters = i;
+        }
+        public void run() {
+            for (int i = 0; i < iters; ++i)
+                ecs.submit(new Task());
+        }
+    }
+
+    static void oneTest(int iters) throws Exception {
+        long startTime = System.nanoTime();
+        new Thread(new Producer(ecs, iters)).start();
+
+        int r = 0;
+        for (int i = 0; i < iters; ++i)
+            r += ecs.take().get().intValue();
+
+        long elapsed = System.nanoTime() - startTime;
+        long tpi = elapsed/ iters;
+
+        if (print)
+            System.out.println("\t: " + LoopHelpers.rightJustify(tpi) + " ns per task");
+
+        if (r == 0) // avoid overoptimization
+            System.out.println("useless result: " + r);
+    }
+
+}