8035150: ShouldNotReachHere() in ConstantPool::copy_entry_to

Reviewed-by: dcubed, mgronlun

hotspot/src/share/vm/oops/constantPool.cpp

@@ -1295,6 +1295,7 @@ void ConstantPool::copy_entry_to(constantPoolHandle from_cp, int from_i,
   } break;
 
   case JVM_CONSTANT_UnresolvedClass:
+  case JVM_CONSTANT_UnresolvedClassInError:
   {
     // Can be resolved after checking tag, so check the slot first.
     CPSlot entry = from_cp->slot_at(from_i);

hotspot/test/serviceability/jvmti/TestRedefineWithUnresolvedClass.java

@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2014, 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
+ * @summary Redefine a class with an UnresolvedClass reference in the constant pool.
+ * @bug 8035150
+ * @library /testlibrary
+ * @build UnresolvedClassAgent com.oracle.java.testlibrary.ProcessTools com.oracle.java.testlibrary.OutputAnalyzer
+ * @run main TestRedefineWithUnresolvedClass
+ */
+
+import java.io.File;
+import java.util.Arrays;
+
+import com.oracle.java.testlibrary.OutputAnalyzer;
+import com.oracle.java.testlibrary.ProcessTools;
+
+public class TestRedefineWithUnresolvedClass {
+
+    final static String slash = File.separator;
+    final static String testClasses = System.getProperty("test.classes") + slash;
+
+    public static void main(String... args) throws Throwable {
+        // delete this class to cause a NoClassDefFoundError
+        File unresolved = new File(testClasses, "MyUnresolvedClass.class");
+        if (unresolved.exists() && !unresolved.delete()) {
+            throw new Exception("Could not delete: " + unresolved);
+        }
+
+        // build the javaagent
+        buildJar("UnresolvedClassAgent");
+
+        // launch a VM with the javaagent
+        launchTest();
+    }
+
+    private static void buildJar(String jarName) throws Throwable {
+        String testSrc = System.getProperty("test.src", "?") + slash;
+
+        String jarPath = String.format("%s%s.jar", testClasses, jarName);
+        String manifestPath = String.format("%s%s.mf", testSrc, jarName);
+        String className = String.format("%s.class", jarName);
+
+        String[] args = new String[] {"-cfm", jarPath, manifestPath, "-C", testClasses, className};
+
+        System.out.println("Running jar " + Arrays.toString(args));
+        sun.tools.jar.Main jarTool = new sun.tools.jar.Main(System.out, System.err, "jar");
+        if (!jarTool.run(args)) {
+            throw new Exception("jar failed: args=" + Arrays.toString(args));
+        }
+    }
+
+    private static void launchTest() throws Throwable {
+        String[] args = {
+            "-javaagent:" + testClasses + "UnresolvedClassAgent.jar",
+            "-Dtest.classes=" + testClasses,
+            "UnresolvedClassAgent" };
+        OutputAnalyzer output = ProcessTools.executeTestJvm(args);
+        output.shouldHaveExitValue(0);
+    }
+}

hotspot/test/serviceability/jvmti/UnresolvedClassAgent.java

@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2014, 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.io.DataInputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.lang.instrument.ClassDefinition;
+import java.lang.instrument.Instrumentation;
+
+/*
+ * This class is present during compilation, but will be deleted before execution.
+ */
+class MyUnresolvedClass {
+    static void bar() {
+    }
+}
+
+class MyRedefinedClass {
+    static void foo() {
+        MyUnresolvedClass.bar();
+    }
+}
+
+public class UnresolvedClassAgent {
+    public static void main(String... args) {
+    }
+
+    public static void premain(String args, Instrumentation inst) throws Exception {
+        try {
+            MyRedefinedClass.foo();
+        } catch(NoClassDefFoundError err) {
+            System.out.println("NoClassDefFoundError (expected)");
+        }
+
+        File f = new File(System.getProperty("test.classes"), "MyRedefinedClass.class");
+        byte[] buf = new byte[(int)f.length()];
+        try (DataInputStream dis = new DataInputStream(new FileInputStream(f))) {
+            dis.readFully(buf);
+        }
+        ClassDefinition cd = new ClassDefinition(MyRedefinedClass.class, buf);
+        inst.redefineClasses(new ClassDefinition[] {cd});
+
+        try {
+            MyRedefinedClass.foo();
+        } catch(NoClassDefFoundError err) {
+            System.out.println("NoClassDefFoundError (expected again)");
+        }
+    }
+}

hotspot/test/serviceability/jvmti/UnresolvedClassAgent.mf

@@ -0,0 +1,3 @@
+Manifest-Version: 1.0
+Premain-Class: UnresolvedClassAgent
+Can-Redefine-Classes: true

hotspot/test/testlibrary/com/oracle/java/testlibrary/ProcessTools.java

@@ -163,10 +163,87 @@ public final class ProcessTools {
 
     // Reporting
     StringBuilder cmdLine = new StringBuilder();
-    for (String cmd : args)
-        cmdLine.append(cmd).append(' ');
+    for (String cmd : args) {
+      cmdLine.append(cmd).append(' ');
+    }
     System.out.println("Command line: [" + cmdLine.toString() + "]");
 
     return new ProcessBuilder(args.toArray(new String[args.size()]));
   }
+
+  /**
+   * Executes a test jvm process, waits for it to finish and returns the process output.
+   * The default jvm options from jtreg, test.vm.opts and test.java.opts, are added.
+   * The java from the test.jdk is used to execute the command.
+   *
+   * The command line will be like:
+   * {test.jdk}/bin/java {test.vm.opts} {test.java.opts} cmds
+   *
+   * @param cmds User specifed arguments.
+   * @return The output from the process.
+   */
+  public static OutputAnalyzer executeTestJvm(String... cmds) throws Throwable {
+    ProcessBuilder pb = createJavaProcessBuilder(Utils.addTestJavaOpts(cmds));
+    return executeProcess(pb);
+  }
+
+  /**
+   * Executes a process, waits for it to finish and returns the process output.
+   * @param pb The ProcessBuilder to execute.
+   * @return The output from the process.
+   */
+  public static OutputAnalyzer executeProcess(ProcessBuilder pb) throws Throwable {
+    OutputAnalyzer output = null;
+    try {
+      output = new OutputAnalyzer(pb.start());
+      return output;
+    } catch (Throwable t) {
+      System.out.println("executeProcess() failed: " + t);
+      throw t;
+    } finally {
+      System.out.println(getProcessLog(pb, output));
+    }
+  }
+
+  /**
+   * Executes a process, waits for it to finish and returns the process output.
+   * @param cmds The command line to execute.
+   * @return The output from the process.
+   */
+  public static OutputAnalyzer executeProcess(String... cmds) throws Throwable {
+    return executeProcess(new ProcessBuilder(cmds));
+  }
+
+  /**
+   * Used to log command line, stdout, stderr and exit code from an executed process.
+   * @param pb The executed process.
+   * @param output The output from the process.
+   */
+  public static String getProcessLog(ProcessBuilder pb, OutputAnalyzer output) {
+    String stderr = output == null ? "null" : output.getStderr();
+    String stdout = output == null ? "null" : output.getStdout();
+    String exitValue = output == null ? "null": Integer.toString(output.getExitValue());
+    StringBuilder logMsg = new StringBuilder();
+    final String nl = System.getProperty("line.separator");
+    logMsg.append("--- ProcessLog ---" + nl);
+    logMsg.append("cmd: " + getCommandLine(pb) + nl);
+    logMsg.append("exitvalue: " + exitValue + nl);
+    logMsg.append("stderr: " + stderr + nl);
+    logMsg.append("stdout: " + stdout + nl);
+    return logMsg.toString();
+  }
+
+  /**
+   * @return The full command line for the ProcessBuilder.
+   */
+  public static String getCommandLine(ProcessBuilder pb) {
+    if (pb == null) {
+      return "null";
+    }
+    StringBuilder cmd = new StringBuilder();
+    for (String s : pb.command()) {
+      cmd.append(s).append(" ");
+    }
+    return cmd.toString().trim();
+  }
 }

hotspot/test/testlibrary/com/oracle/java/testlibrary/Utils.java

@@ -0,0 +1,263 @@
+/*
+ * 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.
+ */
+
+package com.oracle.java.testlibrary;
+
+import static com.oracle.java.testlibrary.Asserts.assertTrue;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileReader;
+import java.io.IOException;
+import java.net.InetAddress;
+import java.net.ServerSocket;
+import java.net.UnknownHostException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.regex.Pattern;
+import java.util.regex.Matcher;
+
+/**
+ * Common library for various test helper functions.
+ */
+public final class Utils {
+
+    /**
+     * Returns the sequence used by operating system to separate lines.
+     */
+    public static final String NEW_LINE = System.getProperty("line.separator");
+
+    /**
+     * Returns the value of 'test.vm.opts'system property.
+     */
+    public static final String VM_OPTIONS = System.getProperty("test.vm.opts", "").trim();
+
+    /**
+     * Returns the value of 'test.java.opts'system property.
+     */
+    public static final String JAVA_OPTIONS = System.getProperty("test.java.opts", "").trim();
+
+    /**
+    * Returns the value of 'test.timeout.factor' system property
+    * converted to {@code double}.
+    */
+    public static final double TIMEOUT_FACTOR;
+    static {
+        String toFactor = System.getProperty("test.timeout.factor", "1.0");
+        TIMEOUT_FACTOR = Double.parseDouble(toFactor);
+    }
+
+    private Utils() {
+        // Private constructor to prevent class instantiation
+    }
+
+    /**
+     * Returns the list of VM options.
+     *
+     * @return List of VM options
+     */
+    public static List<String> getVmOptions() {
+        return Arrays.asList(safeSplitString(VM_OPTIONS));
+    }
+
+    /**
+     * Returns the list of VM options with -J prefix.
+     *
+     * @return The list of VM options with -J prefix
+     */
+    public static List<String> getForwardVmOptions() {
+        String[] opts = safeSplitString(VM_OPTIONS);
+        for (int i = 0; i < opts.length; i++) {
+            opts[i] = "-J" + opts[i];
+        }
+        return Arrays.asList(opts);
+    }
+
+    /**
+     * Returns the default JTReg arguments for a jvm running a test.
+     * This is the combination of JTReg arguments test.vm.opts and test.java.opts.
+     * @return An array of options, or an empty array if no opptions.
+     */
+    public static String[] getTestJavaOpts() {
+        List<String> opts = new ArrayList<String>();
+        Collections.addAll(opts, safeSplitString(VM_OPTIONS));
+        Collections.addAll(opts, safeSplitString(JAVA_OPTIONS));
+        return opts.toArray(new String[0]);
+    }
+
+    /**
+     * Combines given arguments with default JTReg arguments for a jvm running a test.
+     * This is the combination of JTReg arguments test.vm.opts and test.java.opts
+     * @return The combination of JTReg test java options and user args.
+     */
+    public static String[] addTestJavaOpts(String... userArgs) {
+        List<String> opts = new ArrayList<String>();
+        Collections.addAll(opts, getTestJavaOpts());
+        Collections.addAll(opts, userArgs);
+        return opts.toArray(new String[0]);
+    }
+
+    /**
+     * Splits a string by white space.
+     * Works like String.split(), but returns an empty array
+     * if the string is null or empty.
+     */
+    private static String[] safeSplitString(String s) {
+        if (s == null || s.trim().isEmpty()) {
+            return new String[] {};
+        }
+        return s.trim().split("\\s+");
+    }
+
+    /**
+     * @return The full command line for the ProcessBuilder.
+     */
+    public static String getCommandLine(ProcessBuilder pb) {
+        StringBuilder cmd = new StringBuilder();
+        for (String s : pb.command()) {
+            cmd.append(s).append(" ");
+        }
+        return cmd.toString();
+    }
+
+    /**
+     * Returns the free port on the local host.
+     * The function will spin until a valid port number is found.
+     *
+     * @return The port number
+     * @throws InterruptedException if any thread has interrupted the current thread
+     * @throws IOException if an I/O error occurs when opening the socket
+     */
+    public static int getFreePort() throws InterruptedException, IOException {
+        int port = -1;
+
+        while (port <= 0) {
+            Thread.sleep(100);
+
+            ServerSocket serverSocket = null;
+            try {
+                serverSocket = new ServerSocket(0);
+                port = serverSocket.getLocalPort();
+            } finally {
+                serverSocket.close();
+            }
+        }
+
+        return port;
+    }
+
+    /**
+     * Returns the name of the local host.
+     *
+     * @return The host name
+     * @throws UnknownHostException if IP address of a host could not be determined
+     */
+    public static String getHostname() throws UnknownHostException {
+        InetAddress inetAddress = InetAddress.getLocalHost();
+        String hostName = inetAddress.getHostName();
+
+        assertTrue((hostName != null && !hostName.isEmpty()),
+                "Cannot get hostname");
+
+        return hostName;
+    }
+
+    /**
+     * Uses "jcmd -l" to search for a jvm pid. This function will wait
+     * forever (until jtreg timeout) for the pid to be found.
+     * @param key Regular expression to search for
+     * @return The found pid.
+     */
+    public static int waitForJvmPid(String key) throws Throwable {
+        final long iterationSleepMillis = 250;
+        System.out.println("waitForJvmPid: Waiting for key '" + key + "'");
+        System.out.flush();
+        while (true) {
+            int pid = tryFindJvmPid(key);
+            if (pid >= 0) {
+                return pid;
+            }
+            Thread.sleep(iterationSleepMillis);
+        }
+    }
+
+    /**
+     * Searches for a jvm pid in the output from "jcmd -l".
+     *
+     * Example output from jcmd is:
+     * 12498 sun.tools.jcmd.JCmd -l
+     * 12254 /tmp/jdk8/tl/jdk/JTwork/classes/com/sun/tools/attach/Application.jar
+     *
+     * @param key A regular expression to search for.
+     * @return The found pid, or -1 if Enot found.
+     * @throws Exception If multiple matching jvms are found.
+     */
+    public static int tryFindJvmPid(String key) throws Throwable {
+        OutputAnalyzer output = null;
+        try {
+            JDKToolLauncher jcmdLauncher = JDKToolLauncher.create("jcmd");
+            jcmdLauncher.addToolArg("-l");
+            output = ProcessTools.executeProcess(jcmdLauncher.getCommand());
+            output.shouldHaveExitValue(0);
+
+            // Search for a line starting with numbers (pid), follwed by the key.
+            Pattern pattern = Pattern.compile("([0-9]+)\\s.*(" + key + ").*\\r?\\n");
+            Matcher matcher = pattern.matcher(output.getStdout());
+
+            int pid = -1;
+            if (matcher.find()) {
+                pid = Integer.parseInt(matcher.group(1));
+                System.out.println("findJvmPid.pid: " + pid);
+                if (matcher.find()) {
+                    throw new Exception("Found multiple JVM pids for key: " + key);
+                }
+            }
+            return pid;
+        } catch (Throwable t) {
+            System.out.println(String.format("Utils.findJvmPid(%s) failed: %s", key, t));
+            throw t;
+        }
+    }
+
+    /**
+     * Returns file content as a list of strings
+     *
+     * @param file File to operate on
+     * @return List of strings
+     * @throws IOException
+     */
+    public static List<String> fileAsList(File file) throws IOException {
+        assertTrue(file.exists() && file.isFile(),
+                file.getAbsolutePath() + " does not exist or not a file");
+        List<String> output = new ArrayList<>();
+        try (BufferedReader reader = new BufferedReader(new FileReader(file.getAbsolutePath()))) {
+            while (reader.ready()) {
+                output.add(reader.readLine().replace(NEW_LINE, ""));
+            }
+        }
+        return output;
+    }
+
+}