/*

 * Copyright (c) 2015, 2016, 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 8087342

 * @summary Test linkresolver search static, instance and overpass duplicates

 * @modules java.base/jdk.internal.org.objectweb.asm

 * @run main/othervm -Xverify:none TestStaticandInstance

 */

import java.util.*;

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

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

public class TestStaticandInstance {

  static final String stringC = "C";

  static final String stringD = "D";

  static final String stringI = "I";

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

    ClassLoader cl = new ClassLoader() {

      public Class<?> loadClass(String name) throws ClassNotFoundException {

        Class retClass;

        if ((retClass = findLoadedClass(name)) != null) {

           return retClass;

        }

        if (stringC.equals(name)) {

            byte[] classFile=dumpC();

            return defineClass(stringC, classFile, 0, classFile.length);

        }

        if (stringD.equals(name)) {

            byte[] classFile=dumpD();

            return defineClass(stringD, classFile, 0, classFile.length);

        }

        if (stringI.equals(name)) {

            byte[] classFile=dumpI();

            return defineClass(stringI, classFile, 0, classFile.length);

        }

        return super.loadClass(name);

      }

    };

    Class classC = cl.loadClass(stringC);

    Class classI = cl.loadClass(stringI);

    try {

      int staticret = (Integer)cl.loadClass(stringD).getDeclaredMethod("CallStatic").invoke(null);

      if (staticret != 1) {

        throw new RuntimeException("invokestatic failed to call correct method");

      }

      System.out.println("staticret: " + staticret); // should be 1

      int invokeinterfaceret = (Integer)cl.loadClass(stringD).getDeclaredMethod("CallInterface").invoke(null);

      if (invokeinterfaceret != 0) {

        throw new RuntimeException(String.format("Expected java.lang.AbstractMethodError, got %d", invokeinterfaceret));

      }

      System.out.println("invokeinterfaceret: AbstractMethodError");

      int invokevirtualret = (Integer)cl.loadClass(stringD).getDeclaredMethod("CallVirtual").invoke(null);

      if (invokevirtualret != 0) {

        throw new RuntimeException(String.format("Expected java.lang.IncompatibleClassChangeError, got %d", invokevirtualret));

      }

      System.out.println("invokevirtualret: IncompatibleClassChangeError");

    } catch (java.lang.Throwable e) {

      throw new RuntimeException("Unexpected exception: " + e.getMessage());

    }

  }

/*

interface I {

  public int m(); // abstract

  default int q() { return 3; } // trigger defmeth processing: C gets AME overpass

}

// C gets static, private and AME overpass m()I with -Xverify:none

class C implements I {

  static int m() { return 1;}  // javac with "n()" and patch to "m()"

  private int m() { return 2;} // javac with public and patch to private

}

public class D {

  public static int CallStatic() {

    int staticret = C.m();    // javac with "C.n" and patch to "C.m"

    return staticret;

  }

  public static int CallInterface() throws AbstractMethodError{

    try {

      I myI = new C();

      return myI.m();

    } catch (java.lang.AbstractMethodError e) {

      return 0; // for success

    }

  }

  public static int CallVirtual() {

    try {

      C myC = new C();

      return myC.m();

    } catch (java.lang.IncompatibleClassChangeError e) {

      return 0; // for success

    }

  }

}

*/

  public static byte[] dumpC() {

    ClassWriter cw = new ClassWriter(0);

    FieldVisitor fv;

    MethodVisitor mv;

    AnnotationVisitor av0;

    cw.visit(52, ACC_SUPER, "C", null, "java/lang/Object", new String[] { "I" });

    {

      mv = cw.visitMethod(0, "<init>", "()V", null, null);

      mv.visitCode();

      mv.visitVarInsn(ALOAD, 0);

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

      mv.visitInsn(RETURN);

      mv.visitMaxs(1, 1);

      mv.visitEnd();

    }

    {

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

      mv.visitCode();

      mv.visitInsn(ICONST_1);

      mv.visitInsn(IRETURN);

      mv.visitMaxs(1, 0);

      mv.visitEnd();

    }

    {

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

      mv.visitCode();

      mv.visitInsn(ICONST_2);

      mv.visitInsn(IRETURN);

      mv.visitMaxs(1, 1);

      mv.visitEnd();

    }

    cw.visitEnd();

    return cw.toByteArray();

  }

  public static byte[] dumpD () {

    ClassWriter cw = new ClassWriter(0);

    FieldVisitor fv;

    MethodVisitor mv;

    AnnotationVisitor av0;

    cw.visit(52, ACC_PUBLIC + ACC_SUPER, "D", 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", false);

      mv.visitInsn(RETURN);

      mv.visitMaxs(1, 1);

      mv.visitEnd();

    }

    {

      mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "CallStatic", "()I", null, null);

      mv.visitCode();

      mv.visitMethodInsn(INVOKESTATIC, "C", "m", "()I", false);

      mv.visitVarInsn(ISTORE, 0);

      mv.visitVarInsn(ILOAD, 0);

      mv.visitInsn(IRETURN);

      mv.visitMaxs(1, 1);

      mv.visitEnd();

    }

    {

      mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "CallInterface", "()I", null, new String[] { "java/lang/AbstractMethodError" });

      mv.visitCode();

      Label l0 = new Label();

      Label l1 = new Label();

      Label l2 = new Label();

      mv.visitTryCatchBlock(l0, l1, l2, "java/lang/AbstractMethodError");

      mv.visitLabel(l0);

      mv.visitTypeInsn(NEW, "C");

      mv.visitInsn(DUP);

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

      mv.visitVarInsn(ASTORE, 0);

      mv.visitVarInsn(ALOAD, 0);

      mv.visitMethodInsn(INVOKEINTERFACE, "I", "m", "()I", true);

      mv.visitLabel(l1);

      mv.visitInsn(IRETURN);

      mv.visitLabel(l2);

      mv.visitFrame(Opcodes.F_SAME1, 0, null, 1, new Object[] {"java/lang/AbstractMethodError"});

      mv.visitVarInsn(ASTORE, 0);

      mv.visitInsn(ICONST_0);

      mv.visitInsn(IRETURN);

      mv.visitMaxs(2, 1);

      mv.visitEnd();

    }

    {

      mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "CallVirtual", "()I", null, null);

      mv.visitCode();

      Label l0 = new Label();

      Label l1 = new Label();

      Label l2 = new Label();

      mv.visitTryCatchBlock(l0, l1, l2, "java/lang/IncompatibleClassChangeError");

      mv.visitLabel(l0);

      mv.visitTypeInsn(NEW, "C");

      mv.visitInsn(DUP);

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

      mv.visitVarInsn(ASTORE, 0);

      mv.visitVarInsn(ALOAD, 0);

      mv.visitMethodInsn(INVOKEVIRTUAL, "C", "m", "()I", false);

      mv.visitLabel(l1);

      mv.visitInsn(IRETURN);

      mv.visitLabel(l2);

      mv.visitFrame(Opcodes.F_SAME1, 0, null, 1, new Object[] {"java/lang/IncompatibleClassChangeError"});

      mv.visitVarInsn(ASTORE, 0);

      mv.visitInsn(ICONST_0);

      mv.visitInsn(IRETURN);

      mv.visitMaxs(2, 1);

      mv.visitEnd();

    }

    cw.visitEnd();

    return cw.toByteArray();

  }

  public static byte[] dumpI() {

    ClassWriter cw = new ClassWriter(0);

    FieldVisitor fv;

    MethodVisitor mv;

    AnnotationVisitor av0;

    cw.visit(52, ACC_ABSTRACT + ACC_INTERFACE, "I", null, "java/lang/Object", null);

    {

      mv = cw.visitMethod(ACC_PUBLIC + ACC_ABSTRACT, "m", "()I", null, null);

      mv.visitEnd();

    }

    {

      mv = cw.visitMethod(ACC_PUBLIC, "q", "()I", null, null);

      mv.visitCode();

      mv.visitInsn(ICONST_3);

      mv.visitInsn(IRETURN);

      mv.visitMaxs(1, 1);

      mv.visitEnd();

    }

    cw.visitEnd();

    return cw.toByteArray();

  }

}