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/com/sun/jdi/DebuggeeWrapper.java

@@ -0,0 +1,123 @@
+/*
+ * Copyright (c) 2023, 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.
+ */
+
+import java.lang.reflect.InvocationTargetException;
+import java.util.concurrent.ThreadFactory;
+
+public class DebuggeeWrapper {
+
+    public static String PROPERTY_NAME = "test.thread.factory";
+
+    private static final String OLD_MAIN_THREAD_NAME = "old-m-a-i-n";
+
+    private static ThreadFactory threadFactory = r -> new Thread(r);
+
+    private static final String testThreadFactoryName = System.getProperty(PROPERTY_NAME);
+
+    public static String getTestThreadFactoryName() {
+        return testThreadFactoryName;
+    }
+
+    public static boolean isVirtual() {
+        return "Virtual".equals(testThreadFactoryName);
+    }
+
+    public static Thread newThread(Runnable task) {
+        return threadFactory.newThread(task);
+    }
+
+    public static Thread newThread(Runnable task, String name) {
+        Thread t = newThread(task);
+        t.setName(name);
+        return t;
+    }
+
+    public static void main(String[] args) throws Throwable {
+        String className = args[0];
+        String[] classArgs = new String[args.length - 1];
+        System.arraycopy(args, 1, classArgs, 0, args.length - 1);
+        Class c = Class.forName(className);
+        java.lang.reflect.Method mainMethod = c.getMethod("main", new Class[] { String[].class });
+        mainMethod.setAccessible(true);
+
+        if (isVirtual()) {
+            threadFactory = Thread.ofVirtual().factory();
+            MainThreadGroup tg = new MainThreadGroup();
+            Thread vthread = Thread.ofVirtual().unstarted(() -> {
+                try {
+                    mainMethod.invoke(null, new Object[] { classArgs });
+                } catch (InvocationTargetException e) {
+                    tg.uncaughtThrowable = e.getCause();
+                } catch (Throwable error) {
+                    tg.uncaughtThrowable = error;
+                }
+            });
+            Thread.currentThread().setName(OLD_MAIN_THREAD_NAME);
+            vthread.setName("main");
+            vthread.start();
+            vthread.join();
+            if (tg.uncaughtThrowable != null) {
+                // Note we cant just rethrow tg.uncaughtThrowable because there are tests
+                // that track ExceptionEvents, and they will complain about the extra
+                // exception. So instead mimic what happens when the main thread exits
+                // with an exception.
+                System.out.println("Uncaught Exception: " + tg.uncaughtThrowable);
+                tg.uncaughtThrowable.printStackTrace(System.out);
+                System.exit(1);
+            }
+        } else if (getTestThreadFactoryName().equals("Kernel")) {
+            MainThreadGroup tg = new MainThreadGroup();
+            Thread t = new Thread(tg, () -> {
+                try {
+                    mainMethod.invoke(null, new Object[] { classArgs });
+                } catch (InvocationTargetException e) {
+                    tg.uncaughtThrowable = e.getCause();
+                } catch (Throwable error) {
+                    tg.uncaughtThrowable = error;
+                }
+            });
+            t.start();
+            t.join();
+            if (tg.uncaughtThrowable != null) {
+                throw new RuntimeException(tg.uncaughtThrowable);
+            }
+        } else {
+            mainMethod.invoke(null, new Object[] { classArgs });
+        }
+    }
+
+    static class MainThreadGroup extends ThreadGroup {
+        MainThreadGroup() {
+            super("MainThreadGroup");
+        }
+
+        public void uncaughtException(Thread t, Throwable e) {
+            if (e instanceof ThreadDeath) {
+                return;
+            }
+            e.printStackTrace(System.err);
+            uncaughtThrowable = e;
+        }
+        Throwable uncaughtThrowable = null;
+    }
+}