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/nio/file/Files/InterruptCopy.java

@@ -0,0 +1,166 @@
+/*
+ * Copyright (c) 2008, 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 4313887 6993267
+ * @summary Unit test for Sun-specific ExtendedCopyOption.INTERRUPTIBLE option
+ * @modules jdk.unsupported
+ * @library ..
+ */
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.nio.file.Files;
+import java.nio.file.FileStore;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
+import java.util.concurrent.Callable;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+import java.util.concurrent.ScheduledExecutorService;
+import com.sun.nio.file.ExtendedCopyOption;
+
+public class InterruptCopy {
+
+    private static final long FILE_SIZE_TO_COPY = 1024L * 1024L * 1024L;
+    private static final int INTERRUPT_DELAY_IN_MS = 50;
+    private static final int CANCEL_DELAY_IN_MS = 10;
+
+    public static void main(String[] args) throws Exception {
+        Path dir = TestUtil.createTemporaryDirectory();
+        try {
+            FileStore store = Files.getFileStore(dir);
+            System.out.format("Checking space (%s)\n", store);
+            long usableSpace = store.getUsableSpace();
+            if (usableSpace < 2*FILE_SIZE_TO_COPY) {
+                System.out.println("Insufficient disk space to run test.");
+                return;
+            }
+            doTest(dir);
+        } finally {
+            TestUtil.removeAll(dir);
+        }
+    }
+
+    static void doTest(Path dir) throws Exception {
+        final Path source = dir.resolve("foo");
+        final Path target = dir.resolve("bar");
+
+        // create source file (don't create it as sparse file because we
+        // require the copy to take a long time)
+        System.out.println("Creating source file...");
+        byte[] buf = new byte[32*1024];
+        long total = 0;
+        try (OutputStream out = Files.newOutputStream(source)) {
+            do {
+                out.write(buf);
+                total += buf.length;
+            } while (total < FILE_SIZE_TO_COPY);
+        }
+        System.out.println("Source file created.");
+
+        ScheduledExecutorService pool =
+            Executors.newSingleThreadScheduledExecutor();
+
+        try {
+            // copy source to target in main thread, interrupting it
+            // after a delay
+            final Thread me = Thread.currentThread();
+            final CountDownLatch interruptLatch = new CountDownLatch(1);
+            Future<?> wakeup = pool.submit(new Runnable() {
+                public void run() {
+                    try {
+                        interruptLatch.await();
+                        Thread.sleep(INTERRUPT_DELAY_IN_MS);
+                    } catch (InterruptedException ignore) {
+                    }
+                    System.out.printf("Interrupting at %d ms...%n",
+                        System.currentTimeMillis());
+                    me.interrupt();
+                }
+            });
+            try {
+                interruptLatch.countDown();
+                long theBeginning = System.currentTimeMillis();
+                System.out.printf("Copying file at %d ms...%n", theBeginning);
+                Files.copy(source, target, ExtendedCopyOption.INTERRUPTIBLE);
+                long theEnd = System.currentTimeMillis();
+                System.out.printf("Done copying at %d ms...%n", theEnd);
+                long duration = theEnd - theBeginning;
+
+                // If the copy was interrupted the target file should have been
+                // deleted, so if the file does not exist, then the copy must
+                // have been interrupted without throwing an exception; if the
+                // file exists, then the copy finished before being interrupted
+                // so not throwing an exception is not considered a failure
+                if (Files.notExists(target))
+                    throw new RuntimeException("Copy was not interrupted in " +
+                        duration + " ms");
+            } catch (IOException e) {
+                boolean interrupted = Thread.interrupted();
+                if (!interrupted)
+                    throw new RuntimeException("Interrupted status was not set");
+                System.out.println("Copy failed (this is expected).");
+            }
+            try {
+                wakeup.get();
+            } catch (InterruptedException ignore) { }
+            Thread.interrupted();
+
+            // copy source to target via task in thread pool, interrupting it
+            // after a delay using cancel(true)
+            CountDownLatch cancelLatch = new CountDownLatch(1);
+            Future<Void> result = pool.submit(new Callable<Void>() {
+                public Void call() throws IOException {
+                    cancelLatch.countDown();
+                    System.out.printf("Copying file at %d ms...%n",
+                        System.currentTimeMillis());
+                    Files.copy(source, target, ExtendedCopyOption.INTERRUPTIBLE,
+                        StandardCopyOption.REPLACE_EXISTING);
+                    System.out.printf("Done copying at %d ms...%n",
+                        System.currentTimeMillis());
+                    return null;
+                }
+            });
+            try {
+                cancelLatch.await();
+                Thread.sleep(CANCEL_DELAY_IN_MS);
+            } catch (InterruptedException ignore) {
+            }
+            if (result.isDone())
+                throw new RuntimeException("Copy finished before cancellation");
+            System.out.printf("Cancelling at %d ms...%n",
+                System.currentTimeMillis());
+            boolean cancelled  = result.cancel(true);
+            if (cancelled)
+                System.out.println("Copy cancelled.");
+            else {
+                result.get();
+                throw new RuntimeException("Copy was not cancelled");
+            }
+        } finally {
+            pool.shutdown();
+        }
+    }
+}