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/MonitorEventTest.java

@@ -0,0 +1,227 @@
+/*
+ * Copyright (c) 2005, 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.
+ */
+
+/**
+ * @test
+ * @bug 4401399
+ * @summary Simple basic test of jdi Monitor request and event.
+ * @author Swamy Venkataramanappa
+ *
+ * @run build TestScaffold VMConnection TargetListener TargetAdapter
+ * @run compile -g MonitorEventTest.java
+ * @run driver MonitorEventTest
+ */
+import com.sun.jdi.ReferenceType;
+import com.sun.jdi.ThreadReference;
+import com.sun.jdi.event.BreakpointEvent;
+import com.sun.jdi.event.MonitorContendedEnterEvent;
+import com.sun.jdi.event.MonitorContendedEnteredEvent;
+import com.sun.jdi.event.MonitorWaitEvent;
+import com.sun.jdi.event.MonitorWaitedEvent;
+import com.sun.jdi.request.EventRequest;
+import com.sun.jdi.request.MonitorContendedEnterRequest;
+import com.sun.jdi.request.MonitorContendedEnteredRequest;
+import com.sun.jdi.request.MonitorWaitRequest;
+import com.sun.jdi.request.MonitorWaitedRequest;
+
+/********** target program **********/
+
+class MonitorEventTestTarg {
+    public static Object endingMonitor;
+    public static Object startingMonitor;
+    public static final long timeout = 30 * 6000; // milliseconds
+
+    public static volatile boolean aboutEnterLock;
+
+    static void foo() {
+        System.out.println("Howdy!");
+    }
+
+    public static void main(String[] args){
+        endingMonitor = new Object();
+        startingMonitor = new Object();
+
+        Thread t1 = DebuggeeWrapper.newThread(new MyTask());
+        foo();
+        aboutEnterLock = false;
+
+        synchronized(endingMonitor) {
+
+            // run thread
+            try {
+                // start thread
+                synchronized (startingMonitor) {
+                    t1.start();
+                    startingMonitor.wait(timeout);
+                }
+            } catch (InterruptedException e) {
+                System.out.println("Interrupted exception " + e);
+            }
+
+            Thread.yield();
+            while(!(aboutEnterLock && t1.getState() == Thread.State.BLOCKED)) {
+                try {
+                    Thread.sleep(1000);
+                }catch(Exception x){
+                    System.out.println(x);
+                }
+            }
+        }
+        try {
+            t1.join(timeout);
+        } catch (Exception x){
+            System.out.println("Exception while thread.join :" + x);
+        }
+        System.out.println("Test exiting");
+    }
+}
+
+class MyTask implements Runnable {
+    public void run() {
+        synchronized(MonitorEventTestTarg.startingMonitor) {
+            MonitorEventTestTarg.startingMonitor.notify();
+        }
+
+        // contended enter wait until main thread release monitor
+        MonitorEventTestTarg.aboutEnterLock = true;
+        synchronized (MonitorEventTestTarg.endingMonitor) {
+        }
+    }
+}
+
+
+    /********** test program **********/
+
+public class MonitorEventTest extends TestScaffold {
+    ReferenceType targetClass;
+    ThreadReference mainThread;
+    MonitorContendedEnterRequest contendedEnterRequest;
+    MonitorWaitedRequest monitorWaitedRequest;
+    MonitorContendedEnteredRequest contendedEnteredRequest;
+    MonitorWaitRequest monitorWaitRequest;
+
+    static int actualWaitCount = 0;
+    static int actualWaitedCount = 0;
+    static int actualContendedEnterCount = 0;
+    static int actualContendedEnteredCount= 0;
+
+    MonitorEventTest (String args[]) {
+        super(args);
+    }
+
+    public static void main(String[] args)      throws Exception {
+        new MonitorEventTest(args).startTests();
+    }
+
+    /********** event handlers **********/
+
+    public void monitorContendedEnter(MonitorContendedEnterEvent event) {
+
+        actualContendedEnterCount++;
+    }
+
+    public void monitorContendedEntered(MonitorContendedEnteredEvent event) {
+
+        actualContendedEnteredCount++;
+
+    }
+
+    public void monitorWait(MonitorWaitEvent event) {
+
+        actualWaitCount++;
+
+    }
+    public void monitorWaited(MonitorWaitedEvent event) {
+
+        actualWaitedCount++;
+
+    }
+
+
+
+    /********** test core **********/
+
+    protected void runTests() throws Exception {
+        /*
+         * Get to the top of main()
+         * to determine targetClass and mainThread
+         */
+        BreakpointEvent bpe = startToMain("MonitorEventTestTarg");
+        targetClass = bpe.location().declaringType();
+        mainThread = bpe.thread();
+
+        if (vm().canRequestMonitorEvents()) {
+            contendedEnterRequest = eventRequestManager().createMonitorContendedEnterRequest();
+            contendedEnterRequest.setSuspendPolicy(EventRequest.SUSPEND_NONE);
+            contendedEnterRequest.enable();
+            contendedEnteredRequest = eventRequestManager().createMonitorContendedEnteredRequest();
+            contendedEnteredRequest.setSuspendPolicy(EventRequest.SUSPEND_NONE);
+            contendedEnteredRequest.enable();
+            monitorWaitRequest = eventRequestManager().createMonitorWaitRequest();
+            monitorWaitRequest.setSuspendPolicy(EventRequest.SUSPEND_NONE);
+            monitorWaitRequest.enable();
+            monitorWaitedRequest = eventRequestManager().createMonitorWaitedRequest();
+            monitorWaitedRequest.setSuspendPolicy(EventRequest.SUSPEND_NONE);
+            monitorWaitedRequest.enable();
+        } else {
+            System.out.println("request monitor events not supported " );
+        }
+
+
+        resumeTo("MonitorEventTestTarg", "foo", "()V");
+
+        /*
+         * resume until end
+         */
+        listenUntilVMDisconnect();
+
+        /*
+         * At least one of each type event should have recevied by this test.
+         */
+        if (vm().canRequestMonitorEvents()) {
+            if (actualContendedEnterCount == 0) {
+                failure("Did not receive any  contended enter event.");
+            }
+            if (actualContendedEnteredCount == 0) {
+                failure("Did not receive any contended entered event. ");
+            }
+            if (actualWaitCount == 0) {
+                failure("Did not receive any contended monitor wait event");
+            }
+            if (actualWaitedCount == 0) {
+                failure("Did not receive any contended monitor waited event");
+            }
+        }
+
+
+        /*
+         * deal with results of test
+         * if anything has called failure("foo") testFailed will be true
+         */
+        if (!testFailed) {
+            println("MonitorEventTest: passed");
+        } else {
+            throw new Exception("MonitorEventTest: failed");
+        }
+    }
+}