8025238: nsk/jvmti/scenarios/bcinstr/BI04/bi04t002 crashed with SIGSEGV

Summary: Redefined class in stack trace may not be found by method_idnum so handle null.
Reviewed-by: coleenp, dcubed, sspitsyn

test/java/lang/instrument/RedefineMethodInBacktrace.sh

@@ -62,6 +62,10 @@ cp "${TESTSRC}"/RedefineMethodInBacktraceTarget_2.java \
     RedefineMethodInBacktraceTarget.java
 "${JAVAC}" ${TESTJAVACOPTS} ${TESTTOOLVMOPTS} -d . RedefineMethodInBacktraceTarget.java
 
+cp "${TESTSRC}"/RedefineMethodInBacktraceTargetB_2.java \
+    RedefineMethodInBacktraceTargetB.java
+"${JAVAC}" ${TESTJAVACOPTS} ${TESTTOOLVMOPTS} -d . RedefineMethodInBacktraceTargetB.java
+
 "${JAVA}" ${TESTVMOPTS} -javaagent:RedefineMethodInBacktraceAgent.jar \
     -classpath "${TESTCLASSES}" RedefineMethodInBacktraceApp > output.log 2>&1
 RUN_RESULT=$?

test/java/lang/instrument/RedefineMethodInBacktraceApp.java

@@ -21,12 +21,17 @@
  * questions.
  */
 
+import com.sun.management.DiagnosticCommandMBean;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.InputStream;
 import java.lang.instrument.ClassDefinition;
+import java.lang.management.ManagementFactory;
+import java.lang.management.ThreadInfo;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
+import java.util.concurrent.CountDownLatch;
+import sun.management.ManagementFactoryHelper;
 
 /**
  * When an exception is thrown, the JVM collects just enough information
@@ -49,8 +54,12 @@ public class RedefineMethodInBacktraceApp {
         System.exit(0);
     }
 
+    public static CountDownLatch stop = new CountDownLatch(1);
+    public static CountDownLatch called = new CountDownLatch(1);
+
     private void doTest() throws Exception {
         doMethodInBacktraceTest();
+        doMethodInBacktraceTestB();
     }
 
     private void doMethodInBacktraceTest() throws Exception {
@@ -63,6 +72,36 @@ public class RedefineMethodInBacktraceApp {
         touchRedefinedMethodInBacktrace(t);
     }
 
+    private void doMethodInBacktraceTestB() throws Exception {
+        // Start a thread which blocks in method
+        Thread t = new Thread(RedefineMethodInBacktraceTargetB::methodToRedefine);
+        t.setDaemon(true);
+        t.start();
+
+        // Wait here until the new thread is in the method we want to redefine
+        called.await();
+
+        // Now redefine the class while the method is still on the stack of the new thread
+        doRedefine(RedefineMethodInBacktraceTargetB.class);
+
+        // Do thread dumps in two different ways (to exercise different code paths)
+        // while the old class is still on the stack
+
+        ThreadInfo[] tis = ManagementFactory.getThreadMXBean().dumpAllThreads(false, false);
+        for(ThreadInfo ti : tis) {
+            System.out.println(ti);
+        }
+
+        String[] threadPrintArgs = {};
+        Object[] dcmdArgs = {threadPrintArgs};
+        String[] signature = {String[].class.getName()};
+        DiagnosticCommandMBean dcmd = ManagementFactoryHelper.getDiagnosticCommandMBean();
+        System.out.println(dcmd.invoke("threadPrint", dcmdArgs, signature));
+
+        // release the thread
+        stop.countDown();
+    }
+
     private static Throwable getThrowableFromMethodToRedefine() throws Exception {
         Class<RedefineMethodInBacktraceTarget> c =
                 RedefineMethodInBacktraceTarget.class;

test/java/lang/instrument/RedefineMethodInBacktraceTargetB.java

+/*
+ * Copyright (c) 2013, 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.
+ */
+
+/**
+ * The first version of this class. The second version is in
+ * RedefineMethodInBacktraceTargetB_2.java.
+ */
+public class RedefineMethodInBacktraceTargetB {
+    public static void methodToRedefine() {
+        try {
+            // signal that we are here
+            RedefineMethodInBacktraceApp.called.countDown();
+
+            // wait until test is done
+            RedefineMethodInBacktraceApp.stop.await();
+        } catch (InterruptedException ex) {
+            // ignore, test will fail
+        }
+    }
+}

test/java/lang/instrument/RedefineMethodInBacktraceTargetB_2.java

+/*
+ * Copyright (c) 2013, 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.
+ */
+
+/**
+ * This is the second version of this class. The first version is in
+ * RedefineMethodInBacktraceTargetB.java.
+ */
+public class RedefineMethodInBacktraceTargetB {
+    public static void methodToRedefine() {
+    }
+}