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/io/Console/ReadWriteBlockingTest.java
+++ b/test/jdk/java/io/Console/ReadWriteBlockingTest.java
@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2026, 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 8340830
+ * @summary Check if writing to Console is not blocked by other thread's read.
+ *          This test relies on sleep(1000) to ensure that readLine() is
+ *          invoked before printf(), which may not always occur.
+ * @library /test/lib
+ * @requires (os.family == "linux" | os.family == "mac")
+ * @run junit ReadWriteBlockingTest
+ */
+
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+import jdk.test.lib.process.OutputAnalyzer;
+import jdk.test.lib.process.ProcessTools;
+
+import org.junit.jupiter.api.Assumptions;
+import org.junit.jupiter.api.condition.EnabledOnOs;
+import org.junit.jupiter.api.condition.OS;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.ValueSource;
+
+public class ReadWriteBlockingTest {
+
+    @ParameterizedTest
+    @ValueSource(strings = {"java.base", "jdk.internal.le"})
+    @EnabledOnOs({OS.LINUX, OS.MAC})
+    public void testReadWriteBlocking(String consoleModule) throws Exception {
+        // check "expect" command availability
+        var expect = Path.of("/usr/bin/expect");
+        if (!Files.exists(expect) || !Files.isExecutable(expect)) {
+            Assumptions.abort("'" + expect + "' not found");
+        }
+
+        // invoking "expect" command
+        var testSrc = System.getProperty("test.src", ".");
+        var testClasses = System.getProperty("test.classes", ".");
+        var jdkDir = System.getProperty("test.jdk");
+        OutputAnalyzer output = ProcessTools.executeProcess(
+            "/usr/bin/expect",
+            "-n",
+            testSrc + "/readWriteBlocking.exp",
+            jdkDir + "/bin/java",
+            "-classpath", testClasses,
+            "-Djdk.console=" + consoleModule,
+            "ReadWriteBlockingTest");
+        output.reportDiagnosticSummary();
+        output.shouldHaveExitValue(0);
+    }
+
+    public static void main(String... args) {
+        var con = System.console();
+        Thread.ofVirtual().start(() -> {
+            try {
+                // give some time for main thread to invoke readLine()
+                Thread.sleep(1000);
+            } catch (InterruptedException _) {}
+            con.printf("printf() invoked");
+        });
+        con.readLine("");
+    }
+}