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/ThreadLocal/TestThreadId.java

@@ -0,0 +1,93 @@
+/*
+ * Copyright (c) 2007, 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     6434084
+ * @summary Exercise ThreadLocal javadoc "demo" class ThreadId
+ * @author  Pete Soper
+ */
+
+public final class TestThreadId extends Thread {
+
+    // number of times to create threads and gather their ids
+    private static final int ITERATIONCOUNT = 50;
+
+    // Threads constructed per iteration. ITERATIONCOUNT=50 and
+    // THREADCOUNT=50 takes about one second on a sun Blade 1000 (2x750mhz)
+    private static final int THREADCOUNT = 50;
+
+    // The thread local storage object for holding per-thread ids
+    private static ThreadId id = new ThreadId();
+
+    // Holds the per-thread so main method thread can collect it. JMM
+    // guarantees this is valid after this thread joins main method thread.
+    private int value;
+
+    private synchronized int getIdValue() {
+        return value;
+    }
+
+    // Each child thread just publishes its id value for validation
+    public void run() {
+        value = id.get();
+    }
+
+    public static void main(String args[]) throws Throwable {
+
+        // holds true corresponding to a used id value
+        boolean check[] = new boolean[THREADCOUNT*ITERATIONCOUNT];
+
+        // the test threads
+        TestThreadId u[] = new TestThreadId[THREADCOUNT];
+
+        for (int i = 0; i < ITERATIONCOUNT; i++) {
+            // Create and start the threads
+            for (int t=0;t<THREADCOUNT;t++) {
+                u[t] = new TestThreadId();
+                u[t].start();
+            }
+            // Join with each thread and get/check its id
+            for (int t=0;t<THREADCOUNT;t++) {
+                try {
+                    u[t].join();
+                } catch (InterruptedException e) {
+                     throw new RuntimeException(
+                        "TestThreadId: Failed with unexpected exception" + e);
+                }
+                try {
+                    if (check[u[t].getIdValue()]) {
+                        throw new RuntimeException(
+                            "TestThreadId: Failed with duplicated id: " +
+                                u[t].getIdValue());
+                    } else {
+                        check[u[t].getIdValue()] = true;
+                    }
+                } catch (Exception e) {
+                    throw new RuntimeException(
+                        "TestThreadId: Failed with unexpected id value" + e);
+                }
+            }
+        }
+    } // main
+} // TestThreadId