jdk.internal.org.objectweb.asm.Handle Java Examples

@Override
public void visitInvokeDynamicInsn(
    String name,
    String desc,
    Handle bsm,
    Object... bsmArgs)
{
    mv.visitInvokeDynamicInsn(name, desc, bsm, bsmArgs);
    if (constructor) {
        Type[] types = Type.getArgumentTypes(desc);
        for (int i = 0; i < types.length; i++) {
            popValue();
            if (types[i].getSize() == 2) {
                popValue();
            }
        }

        Type returnType = Type.getReturnType(desc);
        if (returnType != Type.VOID_TYPE) {
            pushValue(OTHER);
            if (returnType.getSize() == 2) {
                pushValue(OTHER);
            }
        }
    }
}
 

@Override
public void visitInvokeDynamicInsn(String name, String desc, Handle bsm,
        Object... bsmArgs) {
    checkStartCode();
    checkEndCode();
    checkMethodIdentifier(version, name, "name");
    checkMethodDesc(desc);
    if (bsm.getTag() != Opcodes.H_INVOKESTATIC
            && bsm.getTag() != Opcodes.H_NEWINVOKESPECIAL) {
        throw new IllegalArgumentException("invalid handle tag "
                + bsm.getTag());
    }
    for (int i = 0; i < bsmArgs.length; i++) {
        checkLDCConstant(bsmArgs[i]);
    }
    super.visitInvokeDynamicInsn(name, desc, bsm, bsmArgs);
    ++insnCount;
}
 

@Override
public void visitInvokeDynamicInsn(String name, String desc, Handle bsm,
        Object... bsmArgs) {
    buf.setLength(0);
    buf.append(this.name).append(".visitInvokeDynamicInsn(");
    appendConstant(name);
    buf.append(", ");
    appendConstant(desc);
    buf.append(", ");
    appendConstant(bsm);
    buf.append(", new Object[]{");
    for (int i = 0; i < bsmArgs.length; ++i) {
        appendConstant(bsmArgs[i]);
        if (i != bsmArgs.length - 1) {
            buf.append(", ");
        }
    }
    buf.append("});\n");
    text.add(buf.toString());
}
 

void memberInfoArray(final String className, final List<MemberInfo> mis) {
    if (mis.isEmpty()) {
        pushNull();
        return;
    }

    int pos = 0;
    push(mis.size());
    newObjectArray(SPECIALIZATION_TYPE);
    for (final MemberInfo mi : mis) {
        dup();
        push(pos++);
        visitTypeInsn(NEW, SPECIALIZATION_TYPE);
        dup();
        visitLdcInsn(new Handle(H_INVOKESTATIC, className, mi.getJavaName(), mi.getJavaDesc()));
        final Type    linkLogicClass = mi.getLinkLogicClass();
        final boolean linkLogic      = !linkLogicIsEmpty(linkLogicClass);
        final String  ctor           = linkLogic ? SPECIALIZATION_INIT3 : SPECIALIZATION_INIT2;
        if (linkLogic) {
            visitLdcInsn(linkLogicClass);
        }
        visitInsn(mi.isOptimistic() ? ICONST_1 : ICONST_0);
        visitMethodInsn(INVOKESPECIAL, SPECIALIZATION_TYPE, INIT, ctor, false);
        arrayStore(TYPE_SPECIALIZATION);
    }
}
 

void memberInfoArray(final String className, final List<MemberInfo> mis) {
    if (mis.isEmpty()) {
        pushNull();
        return;
    }

    int pos = 0;
    push(mis.size());
    newObjectArray(METHODHANDLE_TYPE);
    for (final MemberInfo mi : mis) {
        dup();
        push(pos++);
        visitLdcInsn(new Handle(H_INVOKESTATIC, className, mi.getJavaName(), mi.getJavaDesc()));
        arrayStore(TYPE_METHODHANDLE);
    }
}
 

@Override
public void visitInvokeDynamicInsn(
    String name,
    String desc,
    Handle bsm,
    Object... bsmArgs)
{
    buf.setLength(0);
    buf.append(this.name).append(".visitInvokeDynamicInsn(");
    appendConstant(name);
    buf.append(", ");
    appendConstant(desc);
    buf.append(", ");
    appendConstant(bsm);
    buf.append(", new Object[]{");
    for (int i = 0; i < bsmArgs.length; ++i) {
        appendConstant(bsmArgs[i]);
        if (i != bsmArgs.length - 1) {
            buf.append(", ");
        }
    }
    buf.append("});\n");
    text.add(buf.toString());
}
 

private Handle generateBootstrapMethod(Handle h) {
    String bootstrapName = "bootstrapMethod";
    MethodType bootstrapType = MethodType.methodType(CallSite.class, MethodHandles.Lookup.class, String.class, MethodType.class);

    MethodVisitor bmv = cv.visitMethod(ACC_PUBLIC | ACC_STATIC, bootstrapName, bootstrapType.toMethodDescriptorString(), null, null);
    bmv.visitCode();

    String constCallSite = "java/lang/invoke/ConstantCallSite";
    bmv.visitTypeInsn(NEW, constCallSite);
    bmv.visitInsn(DUP);

    bmv.visitLdcInsn(h);

    bmv.visitMethodInsn(INVOKESPECIAL, constCallSite, "<init>", "(Ljava/lang/invoke/MethodHandle;)V", false);
    bmv.visitInsn(ARETURN);

    bmv.visitMaxs(0,0);
    bmv.visitEnd();

    return new Handle(H_INVOKESTATIC, ownerClassName, bootstrapName, bootstrapType.toMethodDescriptorString());
}
 

@Override
public void visitInvokeDynamicInsn(String name, String desc, Handle bsm,
        Object... bsmArgs) {
    mv.visitInvokeDynamicInsn(name, desc, bsm, bsmArgs);
    if (constructor) {
        Type[] types = Type.getArgumentTypes(desc);
        for (int i = 0; i < types.length; i++) {
            popValue();
            if (types[i].getSize() == 2) {
                popValue();
            }
        }

        Type returnType = Type.getReturnType(desc);
        if (returnType != Type.VOID_TYPE) {
            pushValue(OTHER);
            if (returnType.getSize() == 2) {
                pushValue(OTHER);
            }
        }
    }
}
 

@Override
public void visitInvokeDynamicInsn(String name, String desc, Handle bsm,
        Object... bsmArgs) {
    buf.setLength(0);
    buf.append(this.name).append(".visitInvokeDynamicInsn(");
    appendConstant(name);
    buf.append(", ");
    appendConstant(desc);
    buf.append(", ");
    appendConstant(bsm);
    buf.append(", new Object[]{");
    for (int i = 0; i < bsmArgs.length; ++i) {
        appendConstant(bsmArgs[i]);
        if (i != bsmArgs.length - 1) {
            buf.append(", ");
        }
    }
    buf.append("});\n");
    text.add(buf.toString());
}
 

@Override
public void visitInvokeDynamicInsn(String name, String desc, Handle bsm,
        Object... bsmArgs) {
    buf.setLength(0);
    buf.append(this.name).append(".visitInvokeDynamicInsn(");
    appendConstant(name);
    buf.append(", ");
    appendConstant(desc);
    buf.append(", ");
    appendConstant(bsm);
    buf.append(", new Object[]{");
    for (int i = 0; i < bsmArgs.length; ++i) {
        appendConstant(bsmArgs[i]);
        if (i != bsmArgs.length - 1) {
            buf.append(", ");
        }
    }
    buf.append("});\n");
    text.add(buf.toString());
}
 

@Override
public void visitInvokeDynamicInsn(
        final String name,
        final String descriptor,
        final Handle bootstrapMethodHandle,
        final Object... bootstrapMethodArguments) {
    p.visitInvokeDynamicInsn(name, descriptor, bootstrapMethodHandle, bootstrapMethodArguments);
    super.visitInvokeDynamicInsn(name, descriptor, bootstrapMethodHandle, bootstrapMethodArguments);
}
 

@Override
public void visitInvokeDynamicInsn(String name, String desc, Handle bsm,
        Object... bsmArgs) {
    for (int i = 0; i < bsmArgs.length; i++) {
        bsmArgs[i] = remapper.mapValue(bsmArgs[i]);
    }
    super.visitInvokeDynamicInsn(
            remapper.mapInvokeDynamicMethodName(name, desc),
            remapper.mapMethodDesc(desc), (Handle) remapper.mapValue(bsm),
            bsmArgs);
}
 

void checkLDCConstant(final Object cst) {
    if (cst instanceof Type) {
        int s = ((Type) cst).getSort();
        if (s != Type.OBJECT && s != Type.ARRAY && s != Type.METHOD) {
            throw new IllegalArgumentException("Illegal LDC constant value");
        }
        if (s != Type.METHOD && (version & 0xFFFF) < Opcodes.V1_5) {
            throw new IllegalArgumentException(
                    "ldc of a constant class requires at least version 1.5");
        }
        if (s == Type.METHOD && (version & 0xFFFF) < Opcodes.V1_7) {
            throw new IllegalArgumentException(
                    "ldc of a method type requires at least version 1.7");
        }
    } else if (cst instanceof Handle) {
        if ((version & 0xFFFF) < Opcodes.V1_7) {
            throw new IllegalArgumentException(
                    "ldc of a handle requires at least version 1.7");
        }
        int tag = ((Handle) cst).getTag();
        if (tag < Opcodes.H_GETFIELD || tag > Opcodes.H_INVOKEINTERFACE) {
            throw new IllegalArgumentException("invalid handle tag " + tag);
        }
    } else {
        checkConstant(cst);
    }
}
 

@Override
public void visitInvokeDynamicInsn(String name, String desc, Handle bsm,
        Object... bsmArgs) {
    if (mv != null) {
        mv.visitInvokeDynamicInsn(name, desc, bsm, bsmArgs);
    }
    if (this.locals == null) {
        labels = null;
        return;
    }
    pop(desc);
    pushDesc(desc);
    labels = null;
}
 

@Override
public void visitInvokeDynamicInsn(String name, String desc, Handle bsm,
        Object... bsmArgs) {
    minSize += 5;
    maxSize += 5;
    if (mv != null) {
        mv.visitInvokeDynamicInsn(name, desc, bsm, bsmArgs);
    }
}
 

@Override
public void visitLdcInsn(final Object cst) {
    if (mv != null) {
        mv.visitLdcInsn(cst);
    }
    if (this.locals == null) {
        labels = null;
        return;
    }
    if (cst instanceof Integer) {
        push(Opcodes.INTEGER);
    } else if (cst instanceof Long) {
        push(Opcodes.LONG);
        push(Opcodes.TOP);
    } else if (cst instanceof Float) {
        push(Opcodes.FLOAT);
    } else if (cst instanceof Double) {
        push(Opcodes.DOUBLE);
        push(Opcodes.TOP);
    } else if (cst instanceof String) {
        push("java/lang/String");
    } else if (cst instanceof Type) {
        int sort = ((Type) cst).getSort();
        if (sort == Type.OBJECT || sort == Type.ARRAY) {
            push("java/lang/Class");
        } else if (sort == Type.METHOD) {
            push("java/lang/invoke/MethodType");
        } else {
            throw new IllegalArgumentException();
        }
    } else if (cst instanceof Handle) {
        push("java/lang/invoke/MethodHandle");
    } else {
        throw new IllegalArgumentException();
    }
    labels = null;
}
 

static void linkerAddGetterSetter(final MethodGenerator mi, final String className, final MemberInfo getter, final MemberInfo setter) {
    final String propertyName = getter.getName();
    // stack: Collection
    // dup of Collection instance
    mi.dup();

    // Load property name, converting to Symbol if it begins with "@@"
    loadPropertyKey(mi, propertyName);
    // setup flags
    mi.push(getter.getAttributes());
    // setup getter method handle
    mi.visitLdcInsn(new Handle(H_INVOKESTATIC, className,
            getter.getJavaName(), getter.getJavaDesc(), false));
    // setup setter method handle
    if (setter == null) {
        mi.pushNull();
    } else {
        mi.visitLdcInsn(new Handle(H_INVOKESTATIC, className,
                setter.getJavaName(), setter.getJavaDesc(), false));
    }
    // property = AccessorProperty.create(key, flags, getter, setter);
    mi.invokeStatic(ACCESSORPROPERTY_TYPE, ACCESSORPROPERTY_CREATE, ACCESSORPROPERTY_CREATE_DESC);
    // boolean Collection.add(property)
    mi.invokeInterface(COLLECTION_TYPE, COLLECTION_ADD, COLLECTION_ADD_DESC);
    // pop return value of Collection.add
    mi.pop();
    // stack: Collection
}
 

static void linkerAddGetterSetter(final MethodGenerator mi, final String className, final MemberInfo memInfo) {
    final String propertyName = memInfo.getName();
    // stack: Collection
    // dup of Collection instance
    mi.dup();

    // property = AccessorProperty.create(key, flags, getter, setter);
    mi.loadLiteral(propertyName);
    // setup flags
    mi.push(memInfo.getAttributes());
    // setup getter method handle
    String javaName = GETTER_PREFIX + memInfo.getJavaName();
    mi.visitLdcInsn(new Handle(H_INVOKEVIRTUAL, className, javaName, getterDesc(memInfo)));
    // setup setter method handle
    if (memInfo.isFinal()) {
        mi.pushNull();
    } else {
        javaName = SETTER_PREFIX + memInfo.getJavaName();
        mi.visitLdcInsn(new Handle(H_INVOKEVIRTUAL, className, javaName, setterDesc(memInfo)));
    }
    mi.invokeStatic(ACCESSORPROPERTY_TYPE, ACCESSORPROPERTY_CREATE, ACCESSORPROPERTY_CREATE_DESC);
    // boolean Collection.add(property)
    mi.invokeInterface(COLLECTION_TYPE, COLLECTION_ADD, COLLECTION_ADD_DESC);
    // pop return value of Collection.add
    mi.pop();
    // stack: Collection
}
 

static void linkerAddGetterSetter(final MethodGenerator mi, final String className, final MemberInfo getter, final MemberInfo setter) {
    final String propertyName = getter.getName();
    // stack: Collection
    // dup of Collection instance
    mi.dup();

    // property = AccessorProperty.create(key, flags, getter, setter);
    mi.loadLiteral(propertyName);
    // setup flags
    mi.push(getter.getAttributes());
    // setup getter method handle
    mi.visitLdcInsn(new Handle(H_INVOKESTATIC, className,
            getter.getJavaName(), getter.getJavaDesc()));
    // setup setter method handle
    if (setter == null) {
        mi.pushNull();
    } else {
        mi.visitLdcInsn(new Handle(H_INVOKESTATIC, className,
                setter.getJavaName(), setter.getJavaDesc()));
    }
    mi.invokeStatic(ACCESSORPROPERTY_TYPE, ACCESSORPROPERTY_CREATE, ACCESSORPROPERTY_CREATE_DESC);
    // boolean Collection.add(property)
    mi.invokeInterface(COLLECTION_TYPE, COLLECTION_ADD, COLLECTION_ADD_DESC);
    // pop return value of Collection.add
    mi.pop();
    // stack: Collection
}
 

@Override
public void visitInvokeDynamicInsn(String name, String desc, Handle bsm,
        Object... bsmArgs) {
    if (mv != null) {
        mv.visitInvokeDynamicInsn(name, desc, bsm, bsmArgs);
    }
    if (this.locals == null) {
        labels = null;
        return;
    }
    pop(desc);
    pushDesc(desc);
    labels = null;
}
 

void checkLDCConstant(final Object cst) {
    if (cst instanceof Type) {
        int s = ((Type) cst).getSort();
        if (s != Type.OBJECT && s != Type.ARRAY && s != Type.METHOD) {
            throw new IllegalArgumentException("Illegal LDC constant value");
        }
        if (s != Type.METHOD && (version & 0xFFFF) < Opcodes.V1_5) {
            throw new IllegalArgumentException(
                    "ldc of a constant class requires at least version 1.5");
        }
        if (s == Type.METHOD && (version & 0xFFFF) < Opcodes.V1_7) {
            throw new IllegalArgumentException(
                    "ldc of a method type requires at least version 1.7");
        }
    } else if (cst instanceof Handle) {
        if ((version & 0xFFFF) < Opcodes.V1_7) {
            throw new IllegalArgumentException(
                    "ldc of a handle requires at least version 1.7");
        }
        int tag = ((Handle) cst).getTag();
        if (tag < Opcodes.H_GETFIELD || tag > Opcodes.H_INVOKEINTERFACE) {
            throw new IllegalArgumentException("invalid handle tag " + tag);
        }
    } else {
        checkConstant(cst);
    }
}
 

@Override
public void visitInvokeDynamicInsn(String name, String desc, Handle bsm,
        Object... bsmArgs) {
    if (mv != null) {
        mv.visitInvokeDynamicInsn(name, desc, bsm, bsmArgs);
    }
    if (this.locals == null) {
        labels = null;
        return;
    }
    pop(desc);
    pushDesc(desc);
    labels = null;
}
 

@Override
public void visitLdcInsn(final Object cst) {
    if (mv != null) {
        mv.visitLdcInsn(cst);
    }
    if (this.locals == null) {
        labels = null;
        return;
    }
    if (cst instanceof Integer) {
        push(Opcodes.INTEGER);
    } else if (cst instanceof Long) {
        push(Opcodes.LONG);
        push(Opcodes.TOP);
    } else if (cst instanceof Float) {
        push(Opcodes.FLOAT);
    } else if (cst instanceof Double) {
        push(Opcodes.DOUBLE);
        push(Opcodes.TOP);
    } else if (cst instanceof String) {
        push("java/lang/String");
    } else if (cst instanceof Type) {
        int sort = ((Type) cst).getSort();
        if (sort == Type.OBJECT || sort == Type.ARRAY) {
            push("java/lang/Class");
        } else if (sort == Type.METHOD) {
            push("java/lang/invoke/MethodType");
        } else {
            throw new IllegalArgumentException();
        }
    } else if (cst instanceof Handle) {
        push("java/lang/invoke/MethodHandle");
    } else {
        throw new IllegalArgumentException();
    }
    labels = null;
}
 

private static void appendHandle(final StringBuilder sb, final Handle h) {
    switch (h.getTag()) {
    case Opcodes.H_GETFIELD:
        sb.append("getfield");
        break;
    case Opcodes.H_GETSTATIC:
        sb.append("getstatic");
        break;
    case Opcodes.H_PUTFIELD:
        sb.append("putfield");
        break;
    case Opcodes.H_PUTSTATIC:
        sb.append("putstatic");
        break;
    case Opcodes.H_INVOKEINTERFACE:
        sb.append("interface");
        break;
    case Opcodes.H_INVOKESPECIAL:
        sb.append("special");
        break;
    case Opcodes.H_INVOKESTATIC:
        sb.append("static");
        break;
    case Opcodes.H_INVOKEVIRTUAL:
        sb.append("virtual");
        break;
    case Opcodes.H_NEWINVOKESPECIAL:
        sb.append("new_special");
        break;
    default:
        assert false;
        break;
    }
    sb.append(" '");
    sb.append(h.getName());
    sb.append("'");
}
 

public Object mapValue(Object value) {
    if (value instanceof Type) {
        return mapType((Type) value);
    }
    if (value instanceof Handle) {
        Handle h = (Handle) value;
        return new Handle(h.getTag(), mapType(h.getOwner()), mapMethodName(
                h.getOwner(), h.getName(), h.getDesc()),
                mapMethodDesc(h.getDesc()));
    }
    return value;
}
 

static void linkerAddGetterSetter(final MethodGenerator mi, final String className, final MemberInfo memInfo) {
    final String propertyName = memInfo.getName();
    // stack: Collection
    // dup of Collection instance
    mi.dup();

    // property = AccessorProperty.create(key, flags, getter, setter);
    mi.loadLiteral(propertyName);
    // setup flags
    mi.push(memInfo.getAttributes());
    // setup getter method handle
    String javaName = GETTER_PREFIX + memInfo.getJavaName();
    mi.visitLdcInsn(new Handle(H_INVOKEVIRTUAL, className, javaName, getterDesc(memInfo)));
    // setup setter method handle
    if (memInfo.isFinal()) {
        mi.pushNull();
    } else {
        javaName = SETTER_PREFIX + memInfo.getJavaName();
        mi.visitLdcInsn(new Handle(H_INVOKEVIRTUAL, className, javaName, setterDesc(memInfo)));
    }
    mi.invokeStatic(ACCESSORPROPERTY_TYPE, ACCESSORPROPERTY_CREATE, ACCESSORPROPERTY_CREATE_DESC);
    // boolean Collection.add(property)
    mi.invokeInterface(COLLECTION_TYPE, COLLECTION_ADD, COLLECTION_ADD_DESC);
    // pop return value of Collection.add
    mi.pop();
    // stack: Collection
}
 

private void generateFinalizerOverride(final String finalizerDelegateName) {
    final InstructionAdapter mv = new InstructionAdapter(cw.visitMethod(ACC_PUBLIC, "finalize",
            VOID_NOARG_METHOD_DESCRIPTOR, null, null));
    // Overridden finalizer will take a MethodHandle to the finalizer delegating method, ...
    mv.aconst(new Handle(Opcodes.H_INVOKESTATIC, generatedClassName, finalizerDelegateName,
            Type.getMethodDescriptor(Type.VOID_TYPE, OBJECT_TYPE)));
    mv.visitVarInsn(ALOAD, 0);
    // ...and invoke it through JavaAdapterServices.invokeNoPermissions
    mv.invokestatic(SERVICES_CLASS_TYPE_NAME, "invokeNoPermissions",
            Type.getMethodDescriptor(METHOD_HANDLE_TYPE, OBJECT_TYPE), false);
    mv.visitInsn(RETURN);
    endMethod(mv);
}
 

@Override
public void visitInvokeDynamicInsn(String name, String desc, Handle bsm,
        Object... bsmArgs) {
    for (int i = 0; i < bsmArgs.length; i++) {
        bsmArgs[i] = remapper.mapValue(bsmArgs[i]);
    }
    super.visitInvokeDynamicInsn(
            remapper.mapInvokeDynamicMethodName(name, desc),
            remapper.mapMethodDesc(desc), (Handle) remapper.mapValue(bsm),
            bsmArgs);
}
 

private static void appendHandle(final StringBuilder sb, final Handle h) {
    switch (h.getTag()) {
    case Opcodes.H_GETFIELD:
        sb.append("getfield");
        break;
    case Opcodes.H_GETSTATIC:
        sb.append("getstatic");
        break;
    case Opcodes.H_PUTFIELD:
        sb.append("putfield");
        break;
    case Opcodes.H_PUTSTATIC:
        sb.append("putstatic");
        break;
    case Opcodes.H_INVOKEINTERFACE:
        sb.append("interface");
        break;
    case Opcodes.H_INVOKESPECIAL:
        sb.append("special");
        break;
    case Opcodes.H_INVOKESTATIC:
        sb.append("static");
        break;
    case Opcodes.H_INVOKEVIRTUAL:
        sb.append("virtual");
        break;
    case Opcodes.H_NEWINVOKESPECIAL:
        sb.append("new_special");
        break;
    default:
        assert false;
        break;
    }
    sb.append(" '");
    sb.append(h.getName());
    sb.append("'");
}
 

private byte[] loadClassData(String name) throws Exception {
  ClassWriter cw = new ClassWriter(0);
  MethodVisitor mv;

  if (name.equals("C")) {
    cw.visit(52, ACC_SUPER | ACC_PUBLIC, "C", null, "java/lang/Object", null);
    {
      mv = cw.visitMethod(ACC_PRIVATE | ACC_STATIC, "m", "()V", null, null);
      mv.visitCode();
      mv.visitInsn(RETURN);
      mv.visitMaxs(0, 1);
      mv.visitEnd();
    }
    cw.visitEnd();
    return cw.toByteArray();
  } else if (name.equals("Exec")) {
    cw.visit(52, ACC_SUPER | ACC_PUBLIC, "Exec", null, "java/lang/Object", null);
    {
      mv = cw.visitMethod(ACC_PUBLIC | ACC_STATIC, "invokeRef", "()V", null, null);
      mv.visitCode();
      Handle h = new Handle(H_INVOKESTATIC, "C", "m", "()V");
      mv.visitInvokeDynamicInsn("C", "()V", h);
      mv.visitInsn(RETURN);
      mv.visitMaxs(0, 0);
      mv.visitEnd();
    }
    cw.visitEnd();
    return cw.toByteArray();
  }
  return null;
}