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/langtools/jdk/jshell/StopExecutionTest.java

@@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 2015, 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 8171385
+ * @summary Test JShell#stop
+ * @modules jdk.jshell/jdk.internal.jshell.tool
+ * @build KullaTesting TestingInputStream
+ * @run junit StopExecutionTest
+ */
+
+import java.io.IOException;
+import java.io.PipedInputStream;
+import java.io.PipedOutputStream;
+import java.util.Random;
+import java.util.concurrent.CountDownLatch;
+import java.util.function.Consumer;
+
+import jdk.internal.jshell.tool.StopDetectingInputStream;
+import jdk.internal.jshell.tool.StopDetectingInputStream.State;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import org.junit.jupiter.api.Disabled;
+import org.junit.jupiter.api.Test;
+
+public class StopExecutionTest extends AbstractStopExecutionTest {
+
+    @Test // TODO 8129546
+    @Disabled
+    public void testStopLoop() throws InterruptedException {
+        scheduleStop("while (true) ;");
+    }
+
+    @Test // TODO 8129546
+    @Disabled
+    public void testStopASleep() throws InterruptedException {
+        scheduleStop("while (true) { try { Thread.sleep(100); } catch (InterruptedException ex) { } }");
+    }
+
+    @Test // TODO 8129546
+    @Disabled
+    public void testScriptCatchesStop() throws Exception {
+        scheduleStop("for (int i = 0; i < 30; i++) { try { Thread.sleep(100); } catch (Throwable ex) { } }");
+    }
+
+    @Test
+    public void testStopDetectingInputRandom() throws IOException {
+        long seed = System.nanoTime();
+        Random r = new Random(seed);
+
+        for (int m = 0; m < 10; m++) {
+            StopDetectingInputStream buffer = new StopDetectingInputStream(null, null);
+
+            buffer.setState(State.BUFFER);
+
+            for (int i = 0; i < 1000; i++) {
+                int chunkSize = r.nextInt(StopDetectingInputStream.INITIAL_SIZE * 3);
+
+                doChunk(buffer, chunkSize);
+            }
+        }
+    }
+
+    private void doChunk(StopDetectingInputStream buffer, int chunkSize) throws IOException {
+        for (int c = 0; c < chunkSize; c++) {
+            buffer.write(c);
+        }
+
+        for (int c = 0; c < chunkSize; c++) {
+            int read = buffer.read();
+
+            assertEquals(c, read);
+        }
+    }
+
+    @Test
+    public void testStopDetectingInputBufferWaitStop() throws Exception {
+        Runnable shouldNotHappenRun =
+                () -> { throw new AssertionError("Should not happen."); };
+        Consumer<Exception> shouldNotHappenExc =
+                exc -> { throw new AssertionError("Should not happen.", exc); };
+        StopDetectingInputStream sd = new StopDetectingInputStream(shouldNotHappenRun, shouldNotHappenExc);
+        CountDownLatch reading = new CountDownLatch(1);
+        PipedInputStream is = new PipedInputStream() {
+            @Override
+            public int read() throws IOException {
+                reading.countDown();
+                return super.read();
+            }
+        };
+        PipedOutputStream os = new PipedOutputStream(is);
+
+        sd.setInputStream(is);
+        sd.setState(State.BUFFER);
+        reading.await();
+        sd.setState(State.WAIT);
+        os.write(3);
+        int value = sd.read();
+
+        if (value != 3) {
+            throw new AssertionError();
+        }
+    }
+}