Java Code Examples for org.objectweb.asm.ClassWriter#visitField()

The following examples show how to use org.objectweb.asm.ClassWriter#visitField() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example 1

Source File: DynamicEntityGenerator.java From we-cmdb with Apache License 2.0

6 votes

private static void writeField(ClassWriter classWriter, FieldNode field) {
    FieldVisitor fieldVisitor;
    if (field.isJoinNode()) {
        if (EntityRelationship.ManyToOne.equals(field.getEntityRelationship())) {
            fieldVisitor = classWriter.visitField(ACC_PRIVATE, field.getName(), field.getTypeDesc(), null, null);
        } else { // OneToMany or ManyToMany
            fieldVisitor = classWriter.visitField(ACC_PRIVATE, field.getName(), "Ljava/util/Set;", getTypeSiganitureForOneToMany(field.getTypeDesc()), null);
        }
        // ignore join field for json
        AnnotationVisitor annotationVisitor0 = fieldVisitor.visitAnnotation("Lcom/fasterxml/jackson/annotation/JsonIgnore;", true);
        annotationVisitor0.visitEnd();
    } else {
        fieldVisitor = classWriter.visitField(ACC_PRIVATE, field.getName(), typeMap.get(field.getType()), null, null);
    }
    fieldVisitor.visitEnd();
}

Example 2

Source File: IntArrayFieldInitializer.java From bazel with Apache License 2.0

6 votes

@Override
public boolean writeFieldDefinition(
    ClassWriter cw, boolean isFinal, boolean annotateTransitiveFields) {
  int accessLevel = Opcodes.ACC_STATIC;
  if (visibility != Visibility.PRIVATE) {
    accessLevel |= Opcodes.ACC_PUBLIC;
  }
  if (isFinal) {
    accessLevel |= Opcodes.ACC_FINAL;
  }
  FieldVisitor fv = cw.visitField(accessLevel, fieldName, DESC, null, null);
  if (annotateTransitiveFields
      && dependencyInfo.dependencyType() == DependencyInfo.DependencyType.TRANSITIVE) {
    AnnotationVisitor av =
        fv.visitAnnotation(
            RClassGenerator.PROVENANCE_ANNOTATION_CLASS_DESCRIPTOR, /*visible=*/ true);
    av.visit(RClassGenerator.PROVENANCE_ANNOTATION_LABEL_KEY, dependencyInfo.label());
    av.visitEnd();
  }
  fv.visitEnd();
  return true;
}

Example 3

Source File: CallSiteGenerator.java From groovy with Apache License 2.0

6 votes

public static byte[] genStaticMetaMethodSite(CachedMethod cachedMethod, ClassWriter cw, String name) {
    String internalName = name.replace('.', '/');
    classHeader(cw, internalName, "org/codehaus/groovy/runtime/callsite/StaticMetaMethodSite");
    cw.visitField(Opcodes.ACC_PUBLIC + Opcodes.ACC_STATIC, "__constructor__", "Ljava/lang/reflect/Constructor;", null, null);

    genConstructor(cw, "org/codehaus/groovy/runtime/callsite/StaticMetaMethodSite", internalName);

    genCallXxxWithArray(cw, "", "org/codehaus/groovy/runtime/callsite/StaticMetaMethodSite", cachedMethod, "java/lang/Object");
    genCallXxxWithArray(cw, "Static", "org/codehaus/groovy/runtime/callsite/StaticMetaMethodSite", cachedMethod, "java/lang/Class");
    genCallWithFixedParams(cw, "", "org/codehaus/groovy/runtime/callsite/StaticMetaMethodSite", cachedMethod, "java/lang/Object");
    genCallWithFixedParams(cw, "Static", "org/codehaus/groovy/runtime/callsite/StaticMetaMethodSite", cachedMethod, "java/lang/Class");

    cw.visitEnd();

    return cw.toByteArray();
}

Example 4

Source File: InterfaceFieldClassGeneratorTest.java From AVM with MIT License

6 votes

public static byte[] getNestedInterfaceCalledFIELDSLevelOne() {
    ClassWriter classWriter = new ClassWriter(0);
    FieldVisitor fieldVisitor;

    classWriter.visit(V10, ACC_ABSTRACT | ACC_INTERFACE, "NestedInterfaces$FIELDS", null, "java/lang/Object", null);

    classWriter.visitSource("NestedInterfaces.java", null);

    classWriter.visitInnerClass("NestedInterfaces$FIELDS", "NestedInterfaces", "FIELDS", ACC_STATIC | ACC_ABSTRACT | ACC_INTERFACE);

    classWriter.visitInnerClass("NestedInterfaces$FIELDS$FIELDS", "NestedInterfaces$FIELDS", "FIELDS", ACC_PUBLIC | ACC_STATIC | ACC_ABSTRACT | ACC_INTERFACE);

    {
        fieldVisitor = classWriter.visitField(ACC_PUBLIC | ACC_FINAL | ACC_STATIC, "a", "I", null, Integer.valueOf(101));
        fieldVisitor.visitEnd();
    }
    classWriter.visitEnd();

    return classWriter.toByteArray();
}

Example 5

Source File: WriteStyleablesProcessor.java From shrinker with Apache License 2.0

6 votes

@Override
public void proceed() {
    ClassWriter writer = new ClassWriter(ClassWriter.COMPUTE_MAXS);
    writer.visit(Opcodes.V1_6,
            Opcodes.ACC_PUBLIC | Opcodes.ACC_SYNTHETIC | Opcodes.ACC_SUPER,
            RSymbols.R_STYLEABLES_CLASS_NAME,
            null,
            "java/lang/Object",
            null);
    for (String name : symbols.getStyleables().keySet()) {
        writer.visitField(Opcodes.ACC_PUBLIC | Opcodes.ACC_STATIC | Opcodes.ACC_FINAL, name, "[I", null, null);
    }

    writeClinit(writer);
    writer.visitEnd();
    byte[] bytes = writer.toByteArray();
    try {
        if (!dir.isDirectory() && !dir.mkdirs()) {
            throw new RuntimeException("Cannot mkdir " + dir);
        }
        Files.write(dir.toPath().resolve(RSymbols.R_STYLEABLES_CLASS_NAME + ".class"), bytes);
    } catch (IOException e) {
        throw new UncheckedIOException(e);
    }
}

Example 6

Source File: CallSiteGenerator.java From groovy with Apache License 2.0

5 votes

public static byte[] genPojoMetaMethodSite(CachedMethod cachedMethod, ClassWriter cw, String name) {
    String internalName = name.replace('.', '/');
    classHeader(cw, internalName, "org/codehaus/groovy/runtime/callsite/PojoMetaMethodSite");
    cw.visitField(Opcodes.ACC_PUBLIC + Opcodes.ACC_STATIC, "__constructor__", "Ljava/lang/reflect/Constructor;", null, null);

    genConstructor(cw, "org/codehaus/groovy/runtime/callsite/PojoMetaMethodSite", internalName);

    genCallXxxWithArray(cw, "", "org/codehaus/groovy/runtime/callsite/PojoMetaMethodSite", cachedMethod, "java/lang/Object");
    genCallWithFixedParams(cw, "", "org/codehaus/groovy/runtime/callsite/PojoMetaMethodSite", cachedMethod, "java/lang/Object");

    cw.visitEnd();

    return cw.toByteArray();
}

Example 7

Source File: GroupClassGenerator.java From grappa with Apache License 2.0

5 votes

private static void generateFields(final InstructionGroup group,
    final ClassWriter cw)
{
    // TODO: fix the below comment; those "two members" should be split
    // CAUTION: the FieldNode has illegal access flags and an illegal
    // value field since these two members are reused for other
    // purposes, so we need to write out the field "manually" here
    // rather than just call "field.accept(cw)"
    for (final FieldNode field: group.getFields())
        cw.visitField(ACC_PUBLIC + ACC_SYNTHETIC, field.name, field.desc,
            null, null);

}

Example 8

Source File: DynamicClassFactory.java From caravan with Apache License 2.0

5 votes

private Class<?> createClass(ClassPair classPair) {
  String className = generateClassName(classPair);
  String classStr = className.replaceAll("\\.", "/");

  String keyClassType = Type.getDescriptor(classPair.keyClass);
  String valueClassType = Type.getDescriptor(classPair.valueClass);

  ClassWriter cw = new ClassWriter(0);
  cw.visit(V1_7, ACC_PUBLIC + ACC_SUPER, className, null, "java/lang/Object", new String[]{interfaceName});

  AnnotationVisitor anno = cw.visitAnnotation(Type.getDescriptor(JsonPropertyOrder.class), true);
  AnnotationVisitor aa = anno.visitArray("value");
  aa.visit("", "key");
  aa.visit("", "value");
  aa.visitEnd();
  anno.visitEnd();

  FieldVisitor keyField = cw.visitField(ACC_PRIVATE, "key", keyClassType, null, null);
  keyField.visitEnd();

  FieldVisitor valueField = cw.visitField(ACC_PRIVATE, "value", valueClassType, null, null);
  valueField.visitEnd();

  MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
  mv.visitMaxs(2, 1);
  mv.visitVarInsn(ALOAD, 0);
  mv.visitMethodInsn(INVOKESPECIAL, Type.getInternalName(Object.class), "<init>", "()V", false); // call the constructor of super class
  mv.visitInsn(RETURN);
  mv.visitEnd();

  addGetterSetter(classPair, className, classStr, keyClassType, valueClassType, cw);
  addKVPairMethods(classPair, className, classStr, keyClassType, valueClassType, cw);

  cw.visitEnd();

  return defineClass(className, cw.toByteArray());
}

Example 9

Source File: ClassGenerator.java From android-perftracking with MIT License

5 votes

/**
 * Creates AppPerformanceConfig.class file with a static boolean field AppPerformanceConfig#enabled in it.
 *
 * @param value Initializes the AppPerformanceConfig#enabled with value.
 * @return byte array of the class.
 */
public static byte[] generateConfigClass(boolean value) {

  ClassWriter cw = new ClassWriter(0);
  cw.visit(V1_6, ACC_FINAL + ACC_SUPER,
      "com/rakuten/tech/mobile/perf/runtime/internal/AppPerformanceConfig", null,
      "java/lang/Object", null);
  cw.visitField(ACC_PUBLIC + ACC_STATIC, "enabled", "Z", null, value);
  cw.visitEnd();
  return cw.toByteArray();
}

Example 10

Source File: InterfaceFieldClassGeneratorTest.java From AVM with MIT License

5 votes

public static byte[] getNestedInterfaceCalledFIELDSLevelTwo() {

        ClassWriter classWriter = new ClassWriter(0);
        FieldVisitor fieldVisitor;
        MethodVisitor methodVisitor;

        classWriter.visit(V10, ACC_PUBLIC | ACC_ABSTRACT | ACC_INTERFACE, "NestedInterfaces$FIELDS$FIELDS", null, "java/lang/Object", null);

        classWriter.visitSource("NestedInterfaces.java", null);

        classWriter.visitInnerClass("NestedInterfaces$FIELDS", "NestedInterfaces", "FIELDS", ACC_STATIC | ACC_ABSTRACT | ACC_INTERFACE);

        classWriter.visitInnerClass("NestedInterfaces$FIELDS$FIELDS", "NestedInterfaces$FIELDS", "FIELDS", ACC_PUBLIC | ACC_STATIC | ACC_ABSTRACT | ACC_INTERFACE);

        {
            fieldVisitor = classWriter.visitField(ACC_PUBLIC | ACC_FINAL | ACC_STATIC, "b", "I", null, null);
            fieldVisitor.visitEnd();
        }
        {
            methodVisitor = classWriter.visitMethod(ACC_STATIC, "<clinit>", "()V", null, null);
            methodVisitor.visitCode();
            Label label0 = new Label();
            methodVisitor.visitLabel(label0);
            methodVisitor.visitLineNumber(7, label0);
            methodVisitor.visitTypeInsn(NEW, "java/lang/Object");
            methodVisitor.visitInsn(DUP);
            methodVisitor.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
            methodVisitor.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Object", "hashCode", "()I", false);
            methodVisitor.visitFieldInsn(PUTSTATIC, "NestedInterfaces$FIELDS$FIELDS", "b", "I");
            methodVisitor.visitInsn(RETURN);
            methodVisitor.visitMaxs(2, 0);
            methodVisitor.visitEnd();
        }
        classWriter.visitEnd();

        return classWriter.toByteArray();
    }

Example 11

Source File: CrossCheckingSizeOfIT.java From sizeof with Apache License 2.0

5 votes

private static Class<?> generateClassHierarchy(List<List<Class<?>>> classes) {
  TestClassLoader loader = new TestClassLoader();

  String superClassDesc = "java/lang/Object";
  int classIndex = 0;
  
  for (List<Class<?>> fields : classes) {
    String classDesc = "A" + classIndex++;
    ClassWriter cw = new ClassWriter(COMPUTE_MAXS | COMPUTE_FRAMES);
    cw.visit(V1_6, ACC_PUBLIC, classDesc, null, superClassDesc, null);
    MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
    mv.visitCode();
    mv.visitVarInsn(ALOAD, 0);
    mv.visitMethodInsn(INVOKESPECIAL, superClassDesc, "<init>", "()V", false);
    mv.visitInsn(RETURN);
    mv.visitMaxs(1, 1);
    mv.visitEnd();

    int fieldIndex = 0;
    for (Class<?> field : fields) {
      cw.visitField(ACC_PUBLIC, "a" + fieldIndex++, Type.getDescriptor(field), null, null);
    }
    cw.visitEnd();
    loader.defineClass(classDesc, cw.toByteArray());
    superClassDesc = classDesc;
  }
  
  try {
    return loader.loadClass("A" + (classIndex - 1));
  } catch (ClassNotFoundException | NoClassDefFoundError e) {
    throw new AssertionError(e);
  }
}

Example 12

Source File: TestEnumForEclipseCompilerDump.java From AVM with MIT License

4 votes

public static byte[] generateBytecode() {
    ClassWriter classWriter = new ClassWriter(0);
    FieldVisitor fieldVisitor;
    MethodVisitor methodVisitor;

    classWriter.visit(V10, ACC_PUBLIC | ACC_FINAL | ACC_SUPER | ACC_ENUM, PACKAGE_NAME_INTERNAL + "/TestEnumForValues", "Ljava/lang/Enum<L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;>;", "java/lang/Enum", null);

    {
        fieldVisitor = classWriter.visitField(ACC_PUBLIC | ACC_FINAL | ACC_STATIC | ACC_ENUM, "TEST", "L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;", null, null);
        fieldVisitor.visitEnd();
    }
    {
        fieldVisitor = classWriter.visitField(ACC_PRIVATE | ACC_FINAL | ACC_STATIC | ACC_SYNTHETIC, "ENUM$VALUES", "[L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;", null, null);
        fieldVisitor.visitEnd();
    }
    {
        methodVisitor = classWriter.visitMethod(ACC_STATIC, "<clinit>", "()V", null, null);
        methodVisitor.visitCode();
        methodVisitor.visitTypeInsn(NEW, PACKAGE_NAME_INTERNAL + "/TestEnumForValues");
        methodVisitor.visitInsn(DUP);
        methodVisitor.visitLdcInsn("TEST");
        methodVisitor.visitInsn(ICONST_0);
        methodVisitor.visitMethodInsn(INVOKESPECIAL, PACKAGE_NAME_INTERNAL + "/TestEnumForValues", "<init>", "(Ljava/lang/String;I)V", false);
        methodVisitor.visitFieldInsn(PUTSTATIC, PACKAGE_NAME_INTERNAL + "/TestEnumForValues", "TEST", "L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;");
        methodVisitor.visitInsn(ICONST_1);
        methodVisitor.visitTypeInsn(ANEWARRAY, PACKAGE_NAME_INTERNAL + "/TestEnumForValues");
        methodVisitor.visitInsn(DUP);
        methodVisitor.visitInsn(ICONST_0);
        methodVisitor.visitFieldInsn(GETSTATIC, PACKAGE_NAME_INTERNAL + "/TestEnumForValues", "TEST", "L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;");
        methodVisitor.visitInsn(AASTORE);
        methodVisitor.visitFieldInsn(PUTSTATIC, PACKAGE_NAME_INTERNAL + "/TestEnumForValues", "ENUM$VALUES", "[L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;");
        methodVisitor.visitInsn(RETURN);
        methodVisitor.visitMaxs(4, 0);
        methodVisitor.visitEnd();
    }
    {
        methodVisitor = classWriter.visitMethod(ACC_PRIVATE, "<init>", "(Ljava/lang/String;I)V", null, null);
        methodVisitor.visitCode();
        methodVisitor.visitVarInsn(ALOAD, 0);
        methodVisitor.visitVarInsn(ALOAD, 1);
        methodVisitor.visitVarInsn(ILOAD, 2);
        methodVisitor.visitMethodInsn(INVOKESPECIAL, "java/lang/Enum", "<init>", "(Ljava/lang/String;I)V", false);
        methodVisitor.visitInsn(RETURN);
        methodVisitor.visitMaxs(3, 3);
        methodVisitor.visitEnd();
    }
    {
        methodVisitor = classWriter.visitMethod(ACC_PUBLIC | ACC_STATIC, "values", "()[L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;", null, null);
        methodVisitor.visitCode();
        methodVisitor.visitFieldInsn(GETSTATIC, PACKAGE_NAME_INTERNAL + "/TestEnumForValues", "ENUM$VALUES", "[L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;");
        methodVisitor.visitInsn(DUP);
        methodVisitor.visitVarInsn(ASTORE, 0);
        methodVisitor.visitInsn(ICONST_0);
        methodVisitor.visitVarInsn(ALOAD, 0);
        methodVisitor.visitInsn(ARRAYLENGTH);
        methodVisitor.visitInsn(DUP);
        methodVisitor.visitVarInsn(ISTORE, 1);
        methodVisitor.visitTypeInsn(ANEWARRAY, PACKAGE_NAME_INTERNAL + "/TestEnumForValues");
        methodVisitor.visitInsn(DUP);
        methodVisitor.visitVarInsn(ASTORE, 2);
        methodVisitor.visitInsn(ICONST_0);
        methodVisitor.visitVarInsn(ILOAD, 1);
        methodVisitor.visitMethodInsn(INVOKESTATIC, "java/lang/System", "arraycopy", "(Ljava/lang/Object;ILjava/lang/Object;II)V", false);
        methodVisitor.visitVarInsn(ALOAD, 2);
        methodVisitor.visitInsn(ARETURN);
        methodVisitor.visitMaxs(5, 3);
        methodVisitor.visitEnd();
    }
    {
        methodVisitor = classWriter.visitMethod(ACC_PUBLIC | ACC_STATIC, "valueOf", "(Ljava/lang/String;)L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;", null, null);
        methodVisitor.visitCode();
        methodVisitor.visitLdcInsn(Type.getType("L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;"));
        methodVisitor.visitVarInsn(ALOAD, 0);
        methodVisitor.visitMethodInsn(INVOKESTATIC, "java/lang/Enum", "valueOf", "(Ljava/lang/Class;Ljava/lang/String;)Ljava/lang/Enum;", false);
        methodVisitor.visitTypeInsn(CHECKCAST, PACKAGE_NAME_INTERNAL + "/TestEnumForValues");
        methodVisitor.visitInsn(ARETURN);
        methodVisitor.visitMaxs(2, 1);
        methodVisitor.visitEnd();
    }
    classWriter.visitEnd();

    return classWriter.toByteArray();
}

Example 13

Source File: AsmTest.java From atlas with Apache License 2.0

4 votes

@Test
public void test() throws Throwable {

    ClassReader cr = new ClassReader(Config.class.getName());
    ClassWriter cw = new ClassWriter(cr, ClassWriter.COMPUTE_MAXS);
    ClassVisitor cv = new MethodChangeClassAdapter(cw);
    cr.accept(cv, Opcodes.ASM5);

    //Add a new method
    MethodVisitor mw = cw.visitMethod(ACC_PUBLIC + ACC_STATIC,
                                      "add",
                                      "([Ljava/lang/String;)V",
                                      null,
                                      null);

    // pushes the 'out' field (of type PrintStream) of the System class
    mw.visitFieldInsn(GETSTATIC,
                      "java/lang/System",
                      "out",
                      "Ljava/io/PrintStream;");
    // pushes the "Hello World!" String constant
    mw.visitLdcInsn("this is add method print!");
    // invokes the 'println' method (defined in the PrintStream class)
    mw.visitMethodInsn(INVOKEVIRTUAL,
                       "java/io/PrintStream",
                       "println",
                       "(Ljava/lang/String;)V");
    mw.visitInsn(RETURN);
    // this code uses a maximum of two stack elements and two local
    // variables
    mw.visitMaxs(0, 0);
    mw.visitEnd();


    //Type.getDescriptor(AdviceFlowOuterHolder.class)
    FieldVisitor fv = cw.visitField(ACC_PUBLIC + ACC_STATIC + ACC_FINAL,
                                     "age",
                                    Type.INT_TYPE.toString(),
                                     null,
                                     1);
    fv.visitEnd();

    FieldVisitor fv2 = cw.visitField(ACC_PUBLIC + ACC_STATIC + ACC_FINAL,
                                    "name2",
                                    Type.getDescriptor(String.class),
                                    null,
                                    "name2");
    fv2.visitEnd();


    ModifyClassVisiter cv2 = new ModifyClassVisiter(Opcodes.ASM5);
    cv2.addRemoveField("name");
    cr.accept(cv2, Opcodes.ASM5);

    FieldVisitor fv3 = cw.visitField(ACC_PUBLIC + ACC_STATIC + ACC_FINAL,
                                     "name",
                                     Type.getDescriptor(String.class),
                                     null,
                                     "name");
    fv3.visitEnd();




    byte[] code = cw.toByteArray();
    File file = new File("Config.class");
    System.out.println(file.getAbsolutePath());
    FileOutputStream fos = new FileOutputStream(file);
    fos.write(code);
    fos.close();

}

Example 14

Source File: TestEnumForJavacDump.java From AVM with MIT License

4 votes

public static byte[] generateBytecode() {
    ClassWriter classWriter = new ClassWriter(0);
    FieldVisitor fieldVisitor;
    MethodVisitor methodVisitor;

    classWriter.visit(V10, ACC_PUBLIC | ACC_FINAL | ACC_SUPER | ACC_ENUM, PACKAGE_NAME_INTERNAL + "/TestEnumForValues", "Ljava/lang/Enum<L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;>;", "java/lang/Enum", null);

    {
        fieldVisitor = classWriter.visitField(ACC_PUBLIC | ACC_FINAL | ACC_STATIC | ACC_ENUM, "TEST", "L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;", null, null);
        fieldVisitor.visitEnd();
    }
    {
        fieldVisitor = classWriter.visitField(ACC_PRIVATE | ACC_FINAL | ACC_STATIC | ACC_SYNTHETIC, "$VALUES", "[L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;", null, null);
        fieldVisitor.visitEnd();
    }
    {
        methodVisitor = classWriter.visitMethod(ACC_PUBLIC | ACC_STATIC, "values", "()[L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;", null, null);
        methodVisitor.visitCode();
        methodVisitor.visitFieldInsn(GETSTATIC, PACKAGE_NAME_INTERNAL + "/TestEnumForValues", "$VALUES", "[L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;");
        methodVisitor.visitMethodInsn(INVOKEVIRTUAL, "[L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;", "clone", "()Ljava/lang/Object;", false);
        methodVisitor.visitTypeInsn(CHECKCAST, "[L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;");
        methodVisitor.visitInsn(ARETURN);
        methodVisitor.visitMaxs(1, 0);
        methodVisitor.visitEnd();
    }
    {
        methodVisitor = classWriter.visitMethod(ACC_PUBLIC | ACC_STATIC, "valueOf", "(Ljava/lang/String;)L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;", null, null);
        methodVisitor.visitCode();
        methodVisitor.visitLdcInsn(Type.getType("L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;"));
        methodVisitor.visitVarInsn(ALOAD, 0);
        methodVisitor.visitMethodInsn(INVOKESTATIC, "java/lang/Enum", "valueOf", "(Ljava/lang/Class;Ljava/lang/String;)Ljava/lang/Enum;", false);
        methodVisitor.visitTypeInsn(CHECKCAST, PACKAGE_NAME_INTERNAL + "/TestEnumForValues");
        methodVisitor.visitInsn(ARETURN);
        methodVisitor.visitMaxs(2, 1);
        methodVisitor.visitEnd();
    }
    {
        methodVisitor = classWriter.visitMethod(ACC_PRIVATE, "<init>", "(Ljava/lang/String;I)V", "()V", null);
        methodVisitor.visitCode();
        methodVisitor.visitVarInsn(ALOAD, 0);
        methodVisitor.visitVarInsn(ALOAD, 1);
        methodVisitor.visitVarInsn(ILOAD, 2);
        methodVisitor.visitMethodInsn(INVOKESPECIAL, "java/lang/Enum", "<init>", "(Ljava/lang/String;I)V", false);
        methodVisitor.visitInsn(RETURN);
        methodVisitor.visitMaxs(3, 3);
        methodVisitor.visitEnd();
    }
    {
        methodVisitor = classWriter.visitMethod(ACC_STATIC, "<clinit>", "()V", null, null);
        methodVisitor.visitCode();
        methodVisitor.visitTypeInsn(NEW, PACKAGE_NAME_INTERNAL + "/TestEnumForValues");
        methodVisitor.visitInsn(DUP);
        methodVisitor.visitLdcInsn("TEST");
        methodVisitor.visitInsn(ICONST_0);
        methodVisitor.visitMethodInsn(INVOKESPECIAL, PACKAGE_NAME_INTERNAL + "/TestEnumForValues", "<init>", "(Ljava/lang/String;I)V", false);
        methodVisitor.visitFieldInsn(PUTSTATIC, PACKAGE_NAME_INTERNAL + "/TestEnumForValues", "TEST", "L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;");
        methodVisitor.visitInsn(ICONST_1);
        methodVisitor.visitTypeInsn(ANEWARRAY, PACKAGE_NAME_INTERNAL + "/TestEnumForValues");
        methodVisitor.visitInsn(DUP);
        methodVisitor.visitInsn(ICONST_0);
        methodVisitor.visitFieldInsn(GETSTATIC, PACKAGE_NAME_INTERNAL + "/TestEnumForValues", "TEST", "L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;");
        methodVisitor.visitInsn(AASTORE);
        methodVisitor.visitFieldInsn(PUTSTATIC, PACKAGE_NAME_INTERNAL + "/TestEnumForValues", "$VALUES", "[L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;");
        methodVisitor.visitInsn(RETURN);
        methodVisitor.visitMaxs(4, 0);
        methodVisitor.visitEnd();
    }
    classWriter.visitEnd();

    return classWriter.toByteArray();
}

Example 15

Source File: OnChangeAwaitBCGennerator.java From Concurnas with MIT License

4 votes

private void createStateObjectClass(String fileName, String fullname, FuncParams spliceInArgs, HashSet<String> stuffToNull, boolean isEvery, boolean isOnlyClosed){
	//YUCK!
	this.bytecodeVisitor.localvarStackSize.push(0);
	this.bytecodeVisitor.localvarStack.push(new HashMap<String, Pair<Type, Integer>>());

	ClassWriter cw = new ConcClassWriter(ClassWriter.COMPUTE_FRAMES | ClassWriter.COMPUTE_MAXS, bytecodeVisitor.typeDirectory);
	cw.visit(V1_8, ACC_PUBLIC + ACC_SUPER + ACC_SYNTHETIC, fullname, null, "java/lang/Object", null);
	
	{//Fields
		for(FuncParam o : spliceInArgs.params){
			Type fieldType = Utils.copyRemoveGenericUpperBound(o.getTaggedType());
			FieldVisitor fv = cw.visitField(ACC_PUBLIC, o.name, fieldType.getBytecodeType(), fieldType instanceof PrimativeType?null:fieldType.getGenericBytecodeType(), null);
			fv.visitEnd();
		}
		
		cw.visitField(ACC_PUBLIC, "$regSet", Const_RegSetType.getBytecodeType(), null, null).visitEnd();
		cw.visitField(ACC_PUBLIC, "refStateTracker$", Const_RefStateTracker.getBytecodeType(), null, null).visitEnd();
	}
	
	BytecodeOutputter boCasterHelpder = new BytecodeOutputter(cw, false);
	
	{//"<init>"
		ArrayList<Sixple<Type, String, Annotations, Boolean, Boolean, Boolean>> splicedInAsTypeAndStr = spliceInArgs.getAsTypesAndNames();
		ArrayList<Sixple<Type, String, Annotations, Boolean, Boolean, Boolean>> forMeth = Utils.filterOutNameFromtuples(splicedInAsTypeAndStr, stuffToNull);
		MethodVisitor mv = boCasterHelpder.enterMethod("<init>", forMeth, Const_PRIM_VOID, false, false, false, AccessModifier.PUBLIC, 0, fullname, null, false, null);

		mv.visitVarInsn(ALOAD, 0);
		mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
		//mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
		
		int cnt = 1;
		for(Sixple<Type, String, Annotations, Boolean, Boolean, Boolean> tAndName : splicedInAsTypeAndStr){
			mv.visitVarInsn(ALOAD, 0);//this
			Type tt =  tAndName.getA();
			if(stuffToNull.contains(tAndName.getB())){//just null ref it
				mv.visitInsn(Opcodes.ACONST_NULL);
			}
			else{
				Utils.applyLoad(boCasterHelpder, tt, cnt++);
				if (tt instanceof PrimativeType) {
					PrimativeTypeEnum tta = ((PrimativeType) tt).type;
					if (tta == PrimativeTypeEnum.DOUBLE || tta == PrimativeTypeEnum.LONG) {// double, long
						cnt++;
					}
				}
			}
			mv.visitFieldInsn(PUTFIELD, fullname, tAndName.getB(), tt.getBytecodeType());
		}
		
		
		{
			mv.visitVarInsn(ALOAD, 0);
			mv.visitTypeInsn(NEW, "com/concurnas/runtime/cps/IsoRegistrationSet");
			mv.visitInsn(DUP);
			
			mv.visitInsn(isEvery?ICONST_1:ICONST_0);
			mv.visitInsn(isOnlyClosed?ICONST_1:ICONST_0);
			
			mv.visitMethodInsn(INVOKESPECIAL, "com/concurnas/runtime/cps/IsoRegistrationSet", "<init>", "(ZZ)V", false);
			mv.visitFieldInsn(PUTFIELD, fullname, "$regSet", "Lcom/concurnas/runtime/cps/IsoRegistrationSet;");
		}
		
		{
			mv.visitVarInsn(ALOAD, 0);
			mv.visitTypeInsn(NEW, "com/concurnas/runtime/cps/RefStateTracker");
			mv.visitInsn(DUP);
			mv.visitMethodInsn(INVOKESPECIAL, "com/concurnas/runtime/cps/RefStateTracker", "<init>", "()V", false);
			mv.visitFieldInsn(PUTFIELD, fullname, "refStateTracker$", "Lcom/concurnas/runtime/cps/RefStateTracker;");
		}
		
		
		Label l2 = new Label();
		mv.visitLabel(l2);
		mv.visitInsn(RETURN);
		mv.visitMaxs(2, 2);
		mv.visitEnd();
	}
	
	cw.visitEnd();
	
	this.bytecodeVisitor.localvarStackSize.pop();
	this.bytecodeVisitor.localvarStack.pop();

	this.bytecodeVisitor.addNameBtyecode(fileName, cw.toByteArray());
	
}

Example 16

Source File: LowerTest.java From turbine with Apache License 2.0

4 votes

@Test
public void invalidConstants() throws Exception {
  Path lib = temporaryFolder.newFile("lib.jar").toPath();
  try (OutputStream os = Files.newOutputStream(lib);
      JarOutputStream jos = new JarOutputStream(os)) {
    jos.putNextEntry(new JarEntry("Lib.class"));

    ClassWriter cw = new ClassWriter(0);
    cw.visit(52, Opcodes.ACC_SUPER, "Lib", null, "java/lang/Object", null);
    cw.visitField(Opcodes.ACC_FINAL | Opcodes.ACC_STATIC, "ZCONST", "Z", null, Integer.MAX_VALUE);
    cw.visitField(Opcodes.ACC_FINAL | Opcodes.ACC_STATIC, "SCONST", "S", null, Integer.MAX_VALUE);
    jos.write(cw.toByteArray());
  }

  ImmutableMap<String, String> input =
      ImmutableMap.of(
          "Test.java",
          Joiner.on('\n')
              .join(
                  "class Test {",
                  "  static final short SCONST = Lib.SCONST + 0;",
                  "  static final boolean ZCONST = Lib.ZCONST || false;",
                  "}"));

  Map<String, byte[]> actual = IntegrationTestSupport.runTurbine(input, ImmutableList.of(lib));

  Map<String, Object> values = new LinkedHashMap<>();
  new ClassReader(actual.get("Test"))
      .accept(
          new ClassVisitor(Opcodes.ASM7) {
            @Override
            public FieldVisitor visitField(
                int access, String name, String desc, String signature, Object value) {
              values.put(name, value);
              return super.visitField(access, name, desc, signature, value);
            }
          },
          0);

  assertThat(values).containsEntry("SCONST", -1);
  assertThat(values).containsEntry("ZCONST", 1);
}

Example 17

Source File: ClassReaderTest.java From turbine with Apache License 2.0

4 votes

@Test
public void fields() {
  ClassWriter cw = new ClassWriter(0);
  cw.visit(
      52,
      Opcodes.ACC_PUBLIC + Opcodes.ACC_FINAL + Opcodes.ACC_SUPER,
      "test/Hello",
      "<X:Ljava/lang/Object;>Ljava/lang/Object;",
      "java/lang/Object",
      null);
  FieldVisitor fv = cw.visitField(Opcodes.ACC_PUBLIC, "x", "I", null, null);
  fv.visitAnnotation("Ljava/lang/Deprecated;", true);
  cw.visitField(
      Opcodes.ACC_PUBLIC + Opcodes.ACC_FINAL + Opcodes.ACC_STATIC,
      "y",
      "I",
      null,
      Integer.valueOf(42));
  cw.visitField(Opcodes.ACC_PUBLIC, "z", "Ljava/util/List;", "Ljava/util/List<TX;>;", null);
  cw.visitEnd();
  byte[] bytes = cw.toByteArray();

  ClassFile classFile = com.google.turbine.bytecode.ClassReader.read(null, bytes);

  assertThat(classFile.fields()).hasSize(3);

  ClassFile.FieldInfo x = classFile.fields().get(0);
  assertThat(x.access()).isEqualTo(TurbineFlag.ACC_PUBLIC);
  assertThat(x.name()).isEqualTo("x");
  assertThat(x.descriptor()).isEqualTo("I");
  assertThat(x.signature()).isNull();
  assertThat(x.value()).isNull();
  assertThat(x.annotations()).hasSize(1);
  ClassFile.AnnotationInfo annotation = Iterables.getOnlyElement(x.annotations());
  assertThat(annotation.typeName()).isEqualTo("Ljava/lang/Deprecated;");

  ClassFile.FieldInfo y = classFile.fields().get(1);
  assertThat(y.access())
      .isEqualTo(TurbineFlag.ACC_PUBLIC | TurbineFlag.ACC_STATIC | TurbineFlag.ACC_FINAL);
  assertThat(y.name()).isEqualTo("y");
  assertThat(y.descriptor()).isEqualTo("I");
  assertThat(y.value().constantTypeKind()).isEqualTo(TurbineConstantTypeKind.INT);
  assertThat(((Const.IntValue) y.value()).value()).isEqualTo(42);
  assertThat(y.annotations()).isEmpty();

  ClassFile.FieldInfo z = classFile.fields().get(2);
  assertThat(z.name()).isEqualTo("z");
  assertThat(z.descriptor()).isEqualTo("Ljava/util/List;");
  assertThat(z.signature()).isEqualTo("Ljava/util/List<TX;>;");
  assertThat(z.annotations()).isEmpty();
}

Example 18

Source File: MethodHandleFieldAssembler.java From spring-boot-netty with MIT License

4 votes

public static void assembleMethodHandleField(final ClassWriter cw, final Method targetMethod, final String invokerName) {
    final String desc = Type.getDescriptor(MethodHandle.class);
    cw.visitField(ACC_PRIVATE | ACC_FINAL + ACC_STATIC, "HANDLE", desc, null, null);
    cw.visitEnd();

    final MethodVisitor ctor = cw.visitMethod(ACC_STATIC, "<clinit>", "()V", null, null);
    final Label cs = createLabel();
    final Label ce = createLabel();

    ctor.visitCode();
    ctor.visitLabel(cs);

    final String clName = targetMethod.getDeclaringClass().getCanonicalName();
    final String targetMethodName = targetMethod.getName();
    ctor.visitLdcInsn(clName);
    ctor.visitLdcInsn(targetMethodName);

    final Parameter[] parameters = targetMethod.getParameters();
    ctor.visitLdcInsn(parameters.length);

    final Type classType = Type.getType(Class.class);
    final String descriptor = classType.getInternalName();
    ctor.visitTypeInsn(ANEWARRAY, descriptor);

    for (int i = 0; i < parameters.length; i++) {
        ctor.visitInsn(DUP);
        ctor.visitLdcInsn(i);

        final Class<?> paramClass = parameters[i].getType();
        if (paramClass.isPrimitive()) {
            final Class<?> wrapper = Primitives.wrap(paramClass);
            final String holderName = Type.getType(wrapper).getInternalName();

            ctor.visitFieldInsn(GETSTATIC, holderName, "TYPE", CL_DESCRIPTOR);
        } else {
            final Type parameterType = Type.getType(paramClass);
            ctor.visitLdcInsn(parameterType);
        }

        ctor.visitInsn(AASTORE);
    }

    ctor.visitMethodInsn(INVOKESTATIC, MHC_INTERNAL_NAME, "createUniversal",
            '(' + STR_DESCRIPTOR + STR_DESCRIPTOR + CLA_DESCRIPTOR + ')' + MH_DESCRIPTOR, false);
    ctor.visitFieldInsn(PUTSTATIC, invokerName, "HANDLE", MH_DESCRIPTOR);
    ctor.visitInsn(RETURN);

    ctor.visitLabel(ce);
    ctor.visitEnd();

    ctor.visitMaxs(0, 0);
}

Example 19

Source File: ClassWithCredentialsDumper.java From openpojo with Apache License 2.0

4 votes

static byte[] dump() {

    ClassWriter cw = new ClassWriter(0);
    FieldVisitor fv;
    MethodVisitor mv;
    AnnotationVisitor av0;

    cw.visit(52, ACC_FINAL + ACC_SUPER, CLASS_PACKAGE, null, "java/lang/Object", null);

    {
      fv = cw.visitField(ACC_PRIVATE, "credentials", "L" + SUN_SECURITY_KRB_5_CREDENTIALS + ";", null, null);
      fv.visitEnd();
    }
    {
      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_PUBLIC, "getCredentials", "()L" + SUN_SECURITY_KRB_5_CREDENTIALS + ";", null, null);
      mv.visitCode();
      mv.visitVarInsn(ALOAD, 0);
      mv.visitFieldInsn(GETFIELD, CLASS_PACKAGE, "credentials", "L" + SUN_SECURITY_KRB_5_CREDENTIALS + ";");
      mv.visitInsn(ARETURN);
      mv.visitMaxs(1, 1);
      mv.visitEnd();
    }
    {
      mv = cw.visitMethod(ACC_PUBLIC, "setCredentials", "(L" + SUN_SECURITY_KRB_5_CREDENTIALS + ";)V", null, null);
      mv.visitCode();
      mv.visitVarInsn(ALOAD, 0);
      mv.visitVarInsn(ALOAD, 1);
      mv.visitFieldInsn(PUTFIELD, CLASS_PACKAGE, "credentials", "L" + SUN_SECURITY_KRB_5_CREDENTIALS + ";");
      mv.visitInsn(RETURN);
      mv.visitMaxs(2, 2);
      mv.visitEnd();
    }
    cw.visitEnd();

    return cw.toByteArray();
  }

Example 20

Source File: CallSiteGenerator.java From groovy with Apache License 2.0

4 votes

public static byte[] genPogoMetaMethodSite(CachedMethod cachedMethod, ClassWriter cw, String name) {
    String internalName = name.replace('.', '/');
    classHeader(cw, internalName, "org/codehaus/groovy/runtime/callsite/PogoMetaMethodSite");
    cw.visitField(Opcodes.ACC_PUBLIC + Opcodes.ACC_STATIC, "__constructor__", "Ljava/lang/reflect/Constructor;", null, null);

    genConstructor(cw, "org/codehaus/groovy/runtime/callsite/PogoMetaMethodSite", internalName);

    genCallXxxWithArray(cw, "Current", "org/codehaus/groovy/runtime/callsite/PogoMetaMethodSite", cachedMethod, "groovy/lang/GroovyObject");
    genCallXxxWithArray(cw, "", "org/codehaus/groovy/runtime/callsite/PogoMetaMethodSite", cachedMethod, "java/lang/Object");

    genCallWithFixedParams(cw, "Current", "org/codehaus/groovy/runtime/callsite/PogoMetaMethodSite", cachedMethod, "groovy/lang/GroovyObject");
    genCallWithFixedParams(cw, "", "org/codehaus/groovy/runtime/callsite/PogoMetaMethodSite", cachedMethod, "java/lang/Object");


    cw.visitEnd();

    return cw.toByteArray();
}