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 /*

  * 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.

  *

  */

 import java.lang.reflect.InvocationTargetException;

 import java.lang.reflect.Method;

 import java.util.ArrayList;

 import java.util.List;

 import jdk.internal.org.objectweb.asm.ClassWriter;

 import jdk.internal.org.objectweb.asm.Handle;

 import jdk.internal.org.objectweb.asm.MethodVisitor;

 import jdk.internal.org.objectweb.asm.Opcodes;

 import p.Dok;

 /**

  * @test @bug 8025260 8016839

  * @summary Ensure that AbstractMethodError and IllegalAccessError are thrown appropriately, not NullPointerException

  *

  * @compile -XDignore.symbol.file TestAMEnotNPE.java ByteClassLoader.java p/C.java p/Dok.java p/E.java p/F.java p/I.java p/Tdirect.java p/Treflect.java

  *

  * @run main/othervm TestAMEnotNPE

  * @run main/othervm -Xint TestAMEnotNPE

  * @run main/othervm -Xcomp TestAMEnotNPE

  */

 public class TestAMEnotNPE implements Opcodes {

     static boolean writeJarFiles = false;

     static boolean readJarFiles = false;

     /**

      * Optional command line parameter (any case-insensitive prefix of)

      * "writejarfiles" or "readjarfiles".

      *

      * "Writejarfiles" creates a jar file for each different set of tested classes.

      * "Readjarfiles" causes the classloader to use the copies of the classes

      * found in the corresponding jar files.

      *

      * Jarfilenames look something like pD_ext_pF (p.D extends p.F)

      * and qD_m_pp_imp_pI (q.D with package-private m implements p.I)

      *

      */

     public static void main(String args[]) throws Throwable {

         ArrayList<Throwable> lt = new ArrayList<Throwable>();

         if (args.length > 0) {

             String a0 = args[0].toLowerCase();

             if (a0.length() > 0) {

                 writeJarFiles = ("writejarfiles").startsWith(a0);

                 readJarFiles = ("readjarfiles").startsWith(a0);

             }

             if (!(writeJarFiles || readJarFiles)) {

                 throw new Error("Command line parameter (if any) should be prefix of writeJarFiles or readJarFiles");

             }

         }

         try {

             System.out.println("TRYING p.D.m PRIVATE interface-invoked as p.I.m, p.D extends p.F, p.F.m FINAL");

             tryAndCheckThrown(lt, bytesForDprivateSubWhat("p/F"),

                     "p.D extends p.F (p.F implements p.I, FINAL public m), private m",

                     IllegalAccessError.class, "pD_ext_pF");

             // We'll take either a VerifyError (pre 2013-11-30)

             // or an IllegalAccessError (post 2013-11-22)

         } catch (VerifyError ve) {

             System.out.println("Saw expected VerifyError " + ve);

         }

         System.out.println();

         System.out.println("TRYING p.D.m PRIVATE interface-invoked as p.I.m, p.D extends p.E");

         tryAndCheckThrown(lt, bytesForDprivateSubWhat("p/E"),

                 "p.D extends p.E (p.E implements p.I, public m), private m",

                 IllegalAccessError.class, "pD_ext_pE");

         System.out.println("TRYING p.D.m ABSTRACT interface-invoked as p.I.m");

         tryAndCheckThrown(lt, bytesForD(),

                 "D extends abstract C, no m",

                 AbstractMethodError.class, "pD_ext_pC");

         System.out.println("TRYING q.D.m PACKAGE interface-invoked as p.I.m");

         tryAndCheckThrown(lt, "q.D", bytesForDsomeAccess("q/D", 0),

                 "q.D implements p.I, protected m", IllegalAccessError.class,

                 "qD_m_pp_imp_pI");

         // Note jar file name is used in the plural-arg case.

         System.out.println("TRYING p.D.m PRIVATE interface-invoked as p.I.m");

         tryAndCheckThrown(lt, bytesForDsomeAccess("p/D", ACC_PRIVATE),

                 "p.D implements p.I, private m",

                 IllegalAccessError.class, "pD_m_pri_imp_pI");

         // Plural-arg test.

         System.out.println("TRYING p.D.m PRIVATE MANY ARG interface-invoked as p.I.m");

         tryAndCheckThrownMany(lt, bytesForDsomeAccess("p/D", ACC_PRIVATE),

                 "p.D implements p.I, private m", IllegalAccessError.class);

         if (lt.size() > 0) {

             System.out.flush();

             Thread.sleep(250); // This de-interleaves output and error in Netbeans, sigh.

             for (Throwable th : lt)

               System.err.println(th);

             throw new Error("Test failed, there were " + lt.size() + " failures listed above");

         } else {

             System.out.println("ALL PASS, HOORAY!");

         }

     }

     /**

      * The bytes for D, a NOT abstract class extending abstract class C without

      * supplying an implementation for abstract method m. There is a default

      * method in the interface I, but it should lose to the abstract class.

      *

      * @return

      * @throws Exception

      */

     public static byte[] bytesForD() throws Exception {

         ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES

                 | ClassWriter.COMPUTE_MAXS);

         MethodVisitor mv;

         cw.visit(V1_8, ACC_PUBLIC + ACC_SUPER, "p/D", null, "p/C", null);

         {

             mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);

             mv.visitCode();

             mv.visitVarInsn(ALOAD, 0);

             mv.visitMethodInsn(INVOKESPECIAL, "p/C", "<init>", "()V");

             mv.visitInsn(RETURN);

             mv.visitMaxs(0, 0);

             mv.visitEnd();

         }

         cw.visitEnd();

         return cw.toByteArray();

     }

     /**

      * The bytes for D, implements I, does not extend C, declares m()I with

      * access method_acc.

      *

      * @param d_name Name of class defined

      * @param method_acc Accessibility of that class's method m.

      * @return

      * @throws Exception

      */

     public static byte[] bytesForDsomeAccess(String d_name, int method_acc) throws Exception {

         return bytesForSomeDsubSomethingSomeAccess(d_name, "java/lang/Object", method_acc);

     }

     /**

      * The bytes for D implements I, extends some class, declares m()I as

      * private.

      *

      * Invokeinterface of I.m applied to this D should throw IllegalAccessError

      *

      * @param sub_what The name of the class that D will extend.

      * @return

      * @throws Exception

      */

     public static byte[] bytesForDprivateSubWhat(String sub_what) throws Exception {

         return bytesForSomeDsubSomethingSomeAccess("p/D", sub_what, ACC_PRIVATE);

     }

     /**

      * Returns the bytes for a class with name d_name (presumably "D" in some

      * package), extending some class with name sub_what, implementing p.I,

      * and defining two methods m() and m(11args) with access method_acc.

      *

      * @param d_name      Name of class that is defined

      * @param sub_what    Name of class that it extends

      * @param method_acc  Accessibility of method(s) m in defined class.

      * @return

      * @throws Exception

      */

     public static byte[] bytesForSomeDsubSomethingSomeAccess

             (String d_name, String sub_what, int method_acc)

             throws Exception {

         ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES

                 | ClassWriter.COMPUTE_MAXS);

         MethodVisitor mv;

         String[] interfaces = {"p/I"};

         cw.visit(V1_8, ACC_PUBLIC + ACC_SUPER, d_name, null, sub_what, interfaces);

         {

             mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);

             mv.visitCode();

             mv.visitVarInsn(ALOAD, 0);

             mv.visitMethodInsn(INVOKESPECIAL, sub_what, "<init>", "()V");

             mv.visitInsn(RETURN);

             mv.visitMaxs(0, 0);

             mv.visitEnd();

         }

         // int m() {return 3;}

         {

             mv = cw.visitMethod(method_acc, "m", "()I", null, null);

             mv.visitCode();

             mv.visitLdcInsn(new Integer(3));

             mv.visitInsn(IRETURN);

             mv.visitMaxs(0, 0);

             mv.visitEnd();

         }

         // int m(11args) {return 3;}

         {

             mv = cw.visitMethod(method_acc, "m", "(BCSIJ"

                     + "Ljava/lang/Object;"

                     + "Ljava/lang/Object;"

                     + "Ljava/lang/Object;"

                     + "Ljava/lang/Object;"

                     + "Ljava/lang/Object;"

                     + "Ljava/lang/Object;"

                     + ")I", null, null);

             mv.visitCode();

             mv.visitLdcInsn(new Integer(3));

             mv.visitInsn(IRETURN);

             mv.visitMaxs(0, 0);

             mv.visitEnd();

         }

         cw.visitEnd();

         return cw.toByteArray();

     }

     /**

      * The bytecodes for a class p/T defining a methods test() and test(11args)

      * that contain an invokeExact of a particular methodHandle, I.m.

      *

      * Test will be passed values that may imperfectly implement I,

      * and thus may in turn throw exceptions.

      *

      * @return

      * @throws Exception

      */

     public static byte[] bytesForT() throws Exception {

         ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES

                 | ClassWriter.COMPUTE_MAXS);

         MethodVisitor mv;

         cw.visit(V1_8, ACC_PUBLIC + ACC_SUPER, "p/T", null, "java/lang/Object", null);

         {

             mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);

             mv.visitCode();

             mv.visitVarInsn(ALOAD, 0);

             mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V");

             mv.visitInsn(RETURN);

             mv.visitMaxs(0, 0);

             mv.visitEnd();

         }

         // static int test(I)

         {

             mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "test", "(Lp/I;)I", null, null);

             mv.visitCode();

             mv.visitLdcInsn(new Handle(Opcodes.H_INVOKEINTERFACE, "p/I", "m", "()I"));

             mv.visitVarInsn(ALOAD, 0);

             mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/invoke/MethodHandle",

                     "invokeExact", "(Lp/I;)I");

             mv.visitInsn(IRETURN);

             mv.visitMaxs(0, 0);

             mv.visitEnd();

         }

         // static int test(I,11args)

         {

             mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "test", "(Lp/I;BCSIJLjava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;)I", null, null);

             mv.visitCode();

             mv.visitLdcInsn(new Handle(Opcodes.H_INVOKEINTERFACE, "p/I", "m", "(BCSIJLjava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;)I"));

             mv.visitVarInsn(ALOAD, 0);

             mv.visitVarInsn(ILOAD, 1);

             mv.visitVarInsn(ILOAD, 2);

             mv.visitVarInsn(ILOAD, 3);

             mv.visitVarInsn(ILOAD, 4);

             mv.visitVarInsn(LLOAD, 5);

             mv.visitVarInsn(ALOAD, 7);

             mv.visitVarInsn(ALOAD, 8);

             mv.visitVarInsn(ALOAD, 9);

             mv.visitVarInsn(ALOAD, 10);

             mv.visitVarInsn(ALOAD, 11);

             mv.visitVarInsn(ALOAD, 12);

             mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/invoke/MethodHandle",

                     "invokeExact", "(Lp/I;BCSIJLjava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;)I");

             mv.visitInsn(IRETURN);

             mv.visitMaxs(0, 0);

             mv.visitEnd();

         }

         cw.visitEnd();

         return cw.toByteArray();

     }

     private static void tryAndCheckThrown(

             List<Throwable> lt, byte[] dBytes, String what, Class<?> expected, String jar_name)

             throws Throwable {

         tryAndCheckThrown(lt, "p.D", dBytes, what, expected, jar_name);

     }

     private static void tryAndCheckThrown(List<Throwable> lt, String d_name, byte[] dBytes, String what, Class<?> expected, String jar_name)

             throws Throwable {

         System.out.println("Methodhandle invokeExact I.m() for instance of " + what);

         ByteClassLoader bcl1 = new ByteClassLoader(jar_name, readJarFiles, writeJarFiles);

         try {

             Class<?> d1 = bcl1.loadBytes(d_name, dBytes);

             Class<?> t1 = bcl1.loadBytes("p.T", bytesForT());

             invokeTest(t1, d1, expected, lt);

         } finally {

             // Not necessary for others -- all class files are written in this call.

             // (unless the VM crashes first).

             bcl1.close();

         }

         System.out.println("Reflection invoke I.m() for instance of " + what);

         ByteClassLoader bcl3 = new ByteClassLoader(jar_name, readJarFiles, false);

         Class<?> d3 = bcl3.loadBytes(d_name, dBytes);

         Class<?> t3 = bcl3.loadClass("p.Treflect");

         invokeTest(t3, d3, expected, lt);

         System.out.println("Bytecode invokeInterface I.m() for instance of " + what);

         ByteClassLoader bcl2 = new ByteClassLoader(jar_name, readJarFiles, false);

         Class<?> d2 = bcl2.loadBytes(d_name, dBytes);

         Class<?> t2 = bcl2.loadClass("p.Tdirect");

         badGoodBadGood(t2, d2, expected, lt);

     }

     private static void invokeTest(Class<?> t, Class<?> d, Class<?> expected, List<Throwable> lt)

             throws Throwable {

         try {

             Method m = t.getMethod("test", p.I.class);

             Object o = d.newInstance();

             Object result = m.invoke(null, o);

             if (expected != null) {

                 System.out.println("FAIL, Expected " + expected.getName()

                         + " wrapped in InvocationTargetException, but nothing was thrown");

                 lt.add(new Error("Exception " + expected.getName() + " was not thrown"));

             } else {

                 System.out.println("PASS, saw expected return.");

             }

         } catch (InvocationTargetException e) {

             Throwable th = e.getCause();

             th.printStackTrace(System.out);

             if (expected != null) {

                 if (expected.isInstance(th)) {

                     System.out.println("PASS, saw expected exception (" + expected.getName() + ").");

                 } else {

                     System.out.println("FAIL, Expected " + expected.getName()

                             + " wrapped in InvocationTargetException, saw " + th);

                     lt.add(th);

                 }

             } else {

                 System.out.println("FAIL, expected no exception, saw " + th);

                 lt.add(th);

             }

         }

         System.out.println();

     }

     /* Many-arg versions of above */

     private static void tryAndCheckThrownMany(List<Throwable> lt, byte[] dBytes, String what, Class<?> expected)

             throws Throwable {

         System.out.println("Methodhandle invokeExact I.m(11params) for instance of " + what);

         ByteClassLoader bcl1 = new ByteClassLoader("p.D", readJarFiles, false);

         try {

             Class<?> d1 = bcl1.loadBytes("p.D", dBytes);

             Class<?> t1 = bcl1.loadBytes("p.T", bytesForT());

             invokeTestMany(t1, d1, expected, lt);

         } finally {

             bcl1.close(); // Not necessary for others -- all class files are written in this call.

         }

         {

             System.out.println("Bytecode invokeInterface I.m(11params) for instance of " + what);

             ByteClassLoader bcl2 = new ByteClassLoader("pD_m_pri_imp_pI", readJarFiles, false);

             Class<?> d2 = bcl2.loadBytes("p.D", dBytes);

             Class<?> t2 = bcl2.loadClass("p.Tdirect");

             badGoodBadGoodMany(t2, d2, expected, lt);

         }

         {

             System.out.println("Reflection invokeInterface I.m(11params) for instance of " + what);

             ByteClassLoader bcl2 = new ByteClassLoader("pD_m_pri_imp_pI", readJarFiles, false);

             Class<?> d2 = bcl2.loadBytes("p.D", dBytes);

             Class<?> t2 = bcl2.loadClass("p.Treflect");

             invokeTestMany(t2, d2, expected, lt);

         }

     }

     private static void invokeTestMany(Class<?> t, Class<?> d, Class<?> expected, List<Throwable> lt)

             throws Throwable {

         try {

             Method m = t.getMethod("test", p.I.class,

                     Byte.TYPE, Character.TYPE, Short.TYPE, Integer.TYPE, Long.TYPE,

                     Object.class, Object.class, Object.class,

                     Object.class, Object.class, Object.class);

             Object o = d.newInstance();

             Byte b = 1;

             Character c = 2;

             Short s = 3;

             Integer i = 4;

             Long j = 5L;

             Object o1 = b;

             Object o2 = c;

             Object o3 = s;

             Object o4 = i;

             Object o5 = j;

             Object o6 = "6";

             Object result = m.invoke(null, o, b, c, s, i, j,

                     o1, o2, o3, o4, o5, o6);

             if (expected != null) {

                 System.out.println("FAIL, Expected " + expected.getName()

                         + " wrapped in InvocationTargetException, but nothing was thrown");

                 lt.add(new Error("Exception " + expected.getName()

                         + " was not thrown"));

             } else {

                 System.out.println("PASS, saw expected return.");

             }

         } catch (InvocationTargetException e) {

             Throwable th = e.getCause();

             th.printStackTrace(System.out);

             if (expected != null) {

                 if (expected.isInstance(th)) {

                     System.out.println("PASS, saw expected exception ("

                             + expected.getName() + ").");

                 } else {

                     System.out.println("FAIL, Expected " + expected.getName()

                             + " wrapped in InvocationTargetException, saw " + th);

                     lt.add(th);

                 }

             } else {

                 System.out.println("FAIL, expected no exception, saw " + th);

                 lt.add(th);

             }

         }

         System.out.println();

     }

     /**

      * This tests a peculiar idiom for tickling the bug on older VMs that lack

      * methodhandles.  The bug (if not fixed) acts in the following way:

      *

      *  When a broken receiver is passed to the first execution of an invokeinterface

      * bytecode, the illegal access is detected before the effects of resolution are

      * cached for later use, and so repeated calls with a broken receiver will always

      * throw the correct error.

      *

      * If, however, a good receiver is passed to the invokeinterface, the effects of

      * resolution will be successfully cached.  A subsequent execution with a broken

      * receiver will reuse the cached information, skip the detailed resolution work,

      * and instead encounter a null pointer.  By convention, that is the encoding for a

      * missing abstract method, and an AbstractMethodError is thrown -- not the expected

      * IllegalAccessError.

      *

      * @param t2 Test invocation class

      * @param d2 Test receiver class

      * @param expected expected exception type

      * @param lt list of unexpected throwables seen

      */

     private static void badGoodBadGood(Class<?> t2, Class<?> d2, Class<?> expected, List<Throwable> lt)

             throws Throwable {

         System.out.println("  Error input 1st time");

         invokeTest(t2, d2, expected, lt);

         System.out.println("  Good input (instance of Dok)");

         invokeTest(t2, Dok.class, null, lt);

         System.out.println("  Error input 2nd time");

         invokeTest(t2, d2, expected, lt);

         System.out.println("  Good input (instance of Dok)");

         invokeTest(t2, Dok.class, null, lt);

     }

     private static void badGoodBadGoodMany(Class<?> t2, Class<?> d2, Class<?> expected, List<Throwable> lt)

             throws Throwable {

         System.out.println("  Error input 1st time");

         invokeTestMany(t2, d2, expected, lt);

         System.out.println("  Good input (instance of Dok)");

         invokeTestMany(t2, Dok.class, null, lt);

         System.out.println("  Error input 2nd time");

         invokeTestMany(t2, d2, expected, lt);

         System.out.println("  Good input (instance of Dok)");

         invokeTestMany(t2, Dok.class, null, lt);

     }

 }