test/hotspot/jtreg/vmTestbase/vm/mlvm/cp/share/GenManyIndyIncorrectBootstrap.java - platform/libcore - Git at Google

 /*
  * Copyright (c) 2014, 2018, 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 vm.mlvm.cp.share;

 import jdk.internal.org.objectweb.asm.ClassWriter;
 import jdk.internal.org.objectweb.asm.ClassWriterExt;
 import jdk.internal.org.objectweb.asm.Handle;
 import jdk.internal.org.objectweb.asm.MethodVisitor;
 import jdk.internal.org.objectweb.asm.Opcodes;
 import jdk.internal.org.objectweb.asm.Type;
 import jdk.internal.org.objectweb.asm.Label;

 import vm.mlvm.share.ClassfileGenerator;
 import vm.mlvm.share.Env;

 public class GenManyIndyIncorrectBootstrap extends GenFullCP {

     /**
      * Generates a class file and writes it to a file
      * @see vm.mlvm.share.ClassfileGenerator
      * @param args Parameters for ClassfileGenerator.main() method
      */
     public static void main(String[] args) {
         ClassfileGenerator.main(args);
     }

     /**
      * Create class constructor, which
      * create a call site for target method
      * and puts it into static and instance fields
      * @param cw Class writer object
      */
     @Override
     protected void createInitMethod(ClassWriter cw) {
         MethodVisitor mw = cw.visitMethod(
                 Opcodes.ACC_PUBLIC,
                 INIT_METHOD_NAME, INIT_METHOD_SIGNATURE,
                 null,
                 new String[0]);

         mw.visitVarInsn(Opcodes.ALOAD, 0);
         mw.visitMethodInsn(Opcodes.INVOKESPECIAL, PARENT_CLASS_NAME,
                 INIT_METHOD_NAME, INIT_METHOD_SIGNATURE);

         // Create a call site for the target method and store it into bootstrap fields
         mw.visitVarInsn(Opcodes.ALOAD, 0);
         mw.visitTypeInsn(Opcodes.NEW, JLI_CONSTANTCALLSITE);
         mw.visitInsn(Opcodes.DUP);
         mw.visitMethodInsn(Opcodes.INVOKESTATIC, JLI_METHODHANDLES,
                 "lookup", "()" + fd(JLI_METHODHANDLES_LOOKUP));
         mw.visitLdcInsn(Type.getObjectType(fullClassName));
         mw.visitLdcInsn(TARGET_METHOD_NAME);
         mw.visitLdcInsn(TARGET_METHOD_SIGNATURE);
         mw.visitLdcInsn(Type.getObjectType(fullClassName));
         mw.visitMethodInsn(Opcodes.INVOKEVIRTUAL, JL_CLASS,
                 "getClassLoader", "()" + fd(JL_CLASSLOADER));
         mw.visitMethodInsn(Opcodes.INVOKESTATIC, JLI_METHODTYPE,
                 "fromMethodDescriptorString", "(" + fd(JL_STRING) + fd(JL_CLASSLOADER) + ")" + fd(JLI_METHODTYPE));
         mw.visitMethodInsn(Opcodes.INVOKEVIRTUAL, JLI_METHODHANDLES_LOOKUP,
                 "findStatic", "(" + fd(JL_CLASS) + fd(JL_STRING) + fd(JLI_METHODTYPE) + ")" + fd(JLI_METHODHANDLE));
         mw.visitMethodInsn(Opcodes.INVOKESPECIAL, JLI_CONSTANTCALLSITE,
                 INIT_METHOD_NAME, "(" + fd(JLI_METHODHANDLE) + ")V");
         mw.visitInsn(Opcodes.DUP);
         mw.visitFieldInsn(Opcodes.PUTSTATIC, fullClassName, STATIC_BOOTSTRAP_FIELD_NAME, STATIC_BOOTSTRAP_FIELD_SIGNATURE);
         mw.visitFieldInsn(Opcodes.PUTFIELD, fullClassName, INSTANCE_BOOTSTRAP_FIELD_NAME, INSTANCE_BOOTSTRAP_FIELD_SIGNATURE);

         finishMethodCode(mw);
     }

     /**
      * Creates a target method which always throw. It should not be called,
      * since all invokedynamic instructions have invalid bootstrap method types
      * @param cw Class writer object
      */
     @Override
     protected void createTargetMethod(ClassWriter cw) {
         createThrowRuntimeExceptionMethod(cw, true, TARGET_METHOD_NAME, TARGET_METHOD_SIGNATURE);
     }

     /**
      * Creates a bootstrap method which always throw. It should not be called,
      * since all invokedynamic instructions have invalid bootstrap method types
      * @param cw Class writer object
      */
     @Override
     protected void createBootstrapMethod(ClassWriter cw) {
         createThrowRuntimeExceptionMethod(cw, true, BOOTSTRAP_METHOD_NAME, BOOTSTRAP_METHOD_SIGNATURE);
     }

     /**
      * Generates common data for class plus two fields that hold CallSite
      * and used as bootstrap targets
      * @param cw Class writer object
      */
     @Override
     protected void generateCommonData(ClassWriterExt cw) {
         cw.setCacheInvokeDynamic(false);

         cw.visitField(Opcodes.ACC_PUBLIC | Opcodes.ACC_STATIC,
                 STATIC_BOOTSTRAP_FIELD_NAME,
                 STATIC_BOOTSTRAP_FIELD_SIGNATURE, null, null);

         cw.visitField(Opcodes.ACC_PUBLIC,
                 INSTANCE_BOOTSTRAP_FIELD_NAME,
                 INSTANCE_BOOTSTRAP_FIELD_SIGNATURE, null, null);

         super.generateCommonData(cw);

         createThrowRuntimeExceptionMethod(cw, false, INSTANCE_BOOTSTRAP_METHOD_NAME, INSTANCE_BOOTSTRAP_METHOD_SIGNATURE);
     }

     Label throwMethodLabel;

     // The exception to expect that is wrapped in a BootstrapMethodError
     static final String WRAPPED_EXCEPTION = "java/lang/invoke/WrongMethodTypeException";

     // The error to expect that is not wrapped in a BootstrapMethodError and
     // is thrown directly
     static final String DIRECT_ERROR = "java/lang/IncompatibleClassChangeError";

     /**
      * Generates an invokedynamic instruction (plus CP entry)
      * which has invalid reference kind in the CP method handle entry for the bootstrap method
      * @param cw Class writer object
      * @param mw Method writer object
      */
     @Override
     protected void generateCPEntryData(ClassWriter cw, MethodVisitor mw) {
         HandleType[] types = HandleType.values();
         HandleType type = types[Env.getRNG().nextInt(types.length)];

         switch (type) {
             case GETFIELD:
             case PUTFIELD:
             case GETSTATIC:
             case PUTSTATIC:
             case INVOKESPECIAL:
             case INVOKEVIRTUAL:
             case INVOKEINTERFACE:
                 // Handle these cases
                 break;
             default:
                 // And don't generate code for all other cases
                 return;
         }

         Label indyThrowableBegin = new Label();
         Label indyThrowableEnd = new Label();
         Label catchThrowableLabel = new Label();

         Label indyBootstrapBegin = new Label();
         Label indyBootstrapEnd = new Label();
         Label catchBootstrapLabel = new Label();

         mw.visitTryCatchBlock(indyBootstrapBegin, indyBootstrapEnd, catchBootstrapLabel, JL_BOOTSTRAPMETHODERROR);
         mw.visitLabel(indyBootstrapBegin);

         mw.visitTryCatchBlock(indyThrowableBegin, indyThrowableEnd, catchThrowableLabel, JL_THROWABLE);
         mw.visitLabel(indyThrowableBegin);

         Handle bsm;
         switch (type) {
             case GETFIELD:
             case PUTFIELD:
                 bsm = new Handle(type.asmTag,
                         fullClassName,
                         INSTANCE_BOOTSTRAP_FIELD_NAME,
                         INSTANCE_BOOTSTRAP_FIELD_SIGNATURE);
                 break;
             case GETSTATIC:
             case PUTSTATIC:
                 bsm = new Handle(type.asmTag,
                         fullClassName,
                         STATIC_BOOTSTRAP_FIELD_NAME,
                         STATIC_BOOTSTRAP_FIELD_SIGNATURE);
                 break;
             case INVOKESPECIAL:
             case INVOKEVIRTUAL:
             case INVOKEINTERFACE:
                 bsm = new Handle(type.asmTag,
                         fullClassName,
                         INSTANCE_BOOTSTRAP_METHOD_NAME,
                         INSTANCE_BOOTSTRAP_METHOD_SIGNATURE);
                 break;
             default:
                 throw new Error("Unexpected handle type " + type);
         }

         mw.visitInvokeDynamicInsn(TARGET_METHOD_NAME,
                 TARGET_METHOD_SIGNATURE,
                 bsm);

         mw.visitLabel(indyBootstrapEnd);
         mw.visitLabel(indyThrowableEnd);

         // No exception at all, throw error
         Label throwLabel = new Label();
         mw.visitJumpInsn(Opcodes.GOTO, throwLabel);

         // JDK-8079697 workaround: we have to generate stackmaps manually
         mw.visitFrame(Opcodes.F_SAME1, 0, new Object[0], 1, new Object[] { JL_BOOTSTRAPMETHODERROR });

         // Got a bootstrapmethoderror as expected, check that it is wrapping what we expect
         mw.visitLabel(catchBootstrapLabel);

         // Save error in case we need to rethrow it
         mw.visitInsn(Opcodes.DUP);
         mw.visitVarInsn(Opcodes.ASTORE, 1);
         mw.visitMethodInsn(Opcodes.INVOKEVIRTUAL, JL_THROWABLE, "getCause", "()" + fd(JL_THROWABLE));

         // If it is the expected exception, goto next block
         mw.visitTypeInsn(Opcodes.INSTANCEOF, WRAPPED_EXCEPTION);
         Label nextBlockLabel = new Label();
         mw.visitJumpInsn(Opcodes.IFNE, nextBlockLabel);

         // Not the exception we were expectiong, throw error
         mw.visitVarInsn(Opcodes.ALOAD, 1); // Use full chain as cause
         createThrowRuntimeExceptionCodeWithCause(mw,
                 "invokedynamic got an unexpected wrapped exception (expected " + WRAPPED_EXCEPTION
                 + ", bootstrap type=" + type
                 + ", opcode=" + type.asmTag + ")!");

         // JDK-8079697 workaround: we have to generate stackmaps manually
         mw.visitFrame(Opcodes.F_SAME1, 0, new Object[0], 1, new Object[] { JL_THROWABLE });
         mw.visitLabel(catchThrowableLabel);

         // Save error in case we need to rethrow it
         mw.visitInsn(Opcodes.DUP);
         mw.visitVarInsn(Opcodes.ASTORE, 1);

         // If it is the expected exception, goto next block
         mw.visitTypeInsn(Opcodes.INSTANCEOF, DIRECT_ERROR);
         mw.visitJumpInsn(Opcodes.IFNE, nextBlockLabel);

         // Not the exception we were expectiong, throw error
         mw.visitVarInsn(Opcodes.ALOAD, 1); // Use full chain as cause
         createThrowRuntimeExceptionCodeWithCause(mw,
                 "invokedynamic got an unexpected exception (expected " + DIRECT_ERROR
                 + ", bootstrap type" + type
                 + ", opcode=" + type.asmTag + ")!");

         // JDK-8079697 workaround: we have to generate stackmaps manually
         mw.visitFrame(Opcodes.F_CHOP, 0, new Object[0], 0, new Object[0]);

         // Unable to place this code once in the method epilog due to bug in ASM
         mw.visitLabel(throwLabel);
         createThrowRuntimeExceptionCode(mw,
                 "invokedynamic should always throw (bootstrap type" + type +", opcode=" + type.asmTag + ")!");

         mw.visitFrame(Opcodes.F_SAME, 0, new Object[0], 0, new Object[0]);
         mw.visitLabel(nextBlockLabel);
     }
 }
	/*
	* Copyright (c) 2014, 2018, 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 vm.mlvm.cp.share;

	import jdk.internal.org.objectweb.asm.ClassWriter;
	import jdk.internal.org.objectweb.asm.ClassWriterExt;
	import jdk.internal.org.objectweb.asm.Handle;
	import jdk.internal.org.objectweb.asm.MethodVisitor;
	import jdk.internal.org.objectweb.asm.Opcodes;
	import jdk.internal.org.objectweb.asm.Type;
	import jdk.internal.org.objectweb.asm.Label;

	import vm.mlvm.share.ClassfileGenerator;
	import vm.mlvm.share.Env;

	public class GenManyIndyIncorrectBootstrap extends GenFullCP {

	/**
	* Generates a class file and writes it to a file
	* @see vm.mlvm.share.ClassfileGenerator
	* @param args Parameters for ClassfileGenerator.main() method
	*/
	public static void main(String[] args) {
	ClassfileGenerator.main(args);
	}

	/**
	* Create class constructor, which
	* create a call site for target method
	* and puts it into static and instance fields
	* @param cw Class writer object
	*/
	@Override
	protected void createInitMethod(ClassWriter cw) {
	MethodVisitor mw = cw.visitMethod(
	Opcodes.ACC_PUBLIC,
	INIT_METHOD_NAME, INIT_METHOD_SIGNATURE,
	null,
	new String[0]);

	mw.visitVarInsn(Opcodes.ALOAD, 0);
	mw.visitMethodInsn(Opcodes.INVOKESPECIAL, PARENT_CLASS_NAME,
	INIT_METHOD_NAME, INIT_METHOD_SIGNATURE);

	// Create a call site for the target method and store it into bootstrap fields
	mw.visitVarInsn(Opcodes.ALOAD, 0);
	mw.visitTypeInsn(Opcodes.NEW, JLI_CONSTANTCALLSITE);
	mw.visitInsn(Opcodes.DUP);
	mw.visitMethodInsn(Opcodes.INVOKESTATIC, JLI_METHODHANDLES,
	"lookup", "()" + fd(JLI_METHODHANDLES_LOOKUP));
	mw.visitLdcInsn(Type.getObjectType(fullClassName));
	mw.visitLdcInsn(TARGET_METHOD_NAME);
	mw.visitLdcInsn(TARGET_METHOD_SIGNATURE);
	mw.visitLdcInsn(Type.getObjectType(fullClassName));
	mw.visitMethodInsn(Opcodes.INVOKEVIRTUAL, JL_CLASS,
	"getClassLoader", "()" + fd(JL_CLASSLOADER));
	mw.visitMethodInsn(Opcodes.INVOKESTATIC, JLI_METHODTYPE,
	"fromMethodDescriptorString", "(" + fd(JL_STRING) + fd(JL_CLASSLOADER) + ")" + fd(JLI_METHODTYPE));
	mw.visitMethodInsn(Opcodes.INVOKEVIRTUAL, JLI_METHODHANDLES_LOOKUP,
	"findStatic", "(" + fd(JL_CLASS) + fd(JL_STRING) + fd(JLI_METHODTYPE) + ")" + fd(JLI_METHODHANDLE));
	mw.visitMethodInsn(Opcodes.INVOKESPECIAL, JLI_CONSTANTCALLSITE,
	INIT_METHOD_NAME, "(" + fd(JLI_METHODHANDLE) + ")V");
	mw.visitInsn(Opcodes.DUP);
	mw.visitFieldInsn(Opcodes.PUTSTATIC, fullClassName, STATIC_BOOTSTRAP_FIELD_NAME, STATIC_BOOTSTRAP_FIELD_SIGNATURE);
	mw.visitFieldInsn(Opcodes.PUTFIELD, fullClassName, INSTANCE_BOOTSTRAP_FIELD_NAME, INSTANCE_BOOTSTRAP_FIELD_SIGNATURE);

	finishMethodCode(mw);
	}

	/**
	* Creates a target method which always throw. It should not be called,
	* since all invokedynamic instructions have invalid bootstrap method types
	* @param cw Class writer object
	*/
	@Override
	protected void createTargetMethod(ClassWriter cw) {
	createThrowRuntimeExceptionMethod(cw, true, TARGET_METHOD_NAME, TARGET_METHOD_SIGNATURE);
	}

	/**
	* Creates a bootstrap method which always throw. It should not be called,
	* since all invokedynamic instructions have invalid bootstrap method types
	* @param cw Class writer object
	*/
	@Override
	protected void createBootstrapMethod(ClassWriter cw) {
	createThrowRuntimeExceptionMethod(cw, true, BOOTSTRAP_METHOD_NAME, BOOTSTRAP_METHOD_SIGNATURE);
	}

	/**
	* Generates common data for class plus two fields that hold CallSite
	* and used as bootstrap targets
	* @param cw Class writer object
	*/
	@Override
	protected void generateCommonData(ClassWriterExt cw) {
	cw.setCacheInvokeDynamic(false);

	cw.visitField(Opcodes.ACC_PUBLIC \| Opcodes.ACC_STATIC,
	STATIC_BOOTSTRAP_FIELD_NAME,
	STATIC_BOOTSTRAP_FIELD_SIGNATURE, null, null);

	cw.visitField(Opcodes.ACC_PUBLIC,
	INSTANCE_BOOTSTRAP_FIELD_NAME,
	INSTANCE_BOOTSTRAP_FIELD_SIGNATURE, null, null);

	super.generateCommonData(cw);

	createThrowRuntimeExceptionMethod(cw, false, INSTANCE_BOOTSTRAP_METHOD_NAME, INSTANCE_BOOTSTRAP_METHOD_SIGNATURE);
	}

	Label throwMethodLabel;

	// The exception to expect that is wrapped in a BootstrapMethodError
	static final String WRAPPED_EXCEPTION = "java/lang/invoke/WrongMethodTypeException";

	// The error to expect that is not wrapped in a BootstrapMethodError and
	// is thrown directly
	static final String DIRECT_ERROR = "java/lang/IncompatibleClassChangeError";

	/**
	* Generates an invokedynamic instruction (plus CP entry)
	* which has invalid reference kind in the CP method handle entry for the bootstrap method
	* @param cw Class writer object
	* @param mw Method writer object
	*/
	@Override
	protected void generateCPEntryData(ClassWriter cw, MethodVisitor mw) {
	HandleType[] types = HandleType.values();
	HandleType type = types[Env.getRNG().nextInt(types.length)];

	switch (type) {
	case GETFIELD:
	case PUTFIELD:
	case GETSTATIC:
	case PUTSTATIC:
	case INVOKESPECIAL:
	case INVOKEVIRTUAL:
	case INVOKEINTERFACE:
	// Handle these cases
	break;
	default:
	// And don't generate code for all other cases
	return;
	}

	Label indyThrowableBegin = new Label();
	Label indyThrowableEnd = new Label();
	Label catchThrowableLabel = new Label();

	Label indyBootstrapBegin = new Label();
	Label indyBootstrapEnd = new Label();
	Label catchBootstrapLabel = new Label();

	mw.visitTryCatchBlock(indyBootstrapBegin, indyBootstrapEnd, catchBootstrapLabel, JL_BOOTSTRAPMETHODERROR);
	mw.visitLabel(indyBootstrapBegin);

	mw.visitTryCatchBlock(indyThrowableBegin, indyThrowableEnd, catchThrowableLabel, JL_THROWABLE);
	mw.visitLabel(indyThrowableBegin);

	Handle bsm;
	switch (type) {
	case GETFIELD:
	case PUTFIELD:
	bsm = new Handle(type.asmTag,
	fullClassName,
	INSTANCE_BOOTSTRAP_FIELD_NAME,
	INSTANCE_BOOTSTRAP_FIELD_SIGNATURE);
	break;
	case GETSTATIC:
	case PUTSTATIC:
	bsm = new Handle(type.asmTag,
	fullClassName,
	STATIC_BOOTSTRAP_FIELD_NAME,
	STATIC_BOOTSTRAP_FIELD_SIGNATURE);
	break;
	case INVOKESPECIAL:
	case INVOKEVIRTUAL:
	case INVOKEINTERFACE:
	bsm = new Handle(type.asmTag,
	fullClassName,
	INSTANCE_BOOTSTRAP_METHOD_NAME,
	INSTANCE_BOOTSTRAP_METHOD_SIGNATURE);
	break;
	default:
	throw new Error("Unexpected handle type " + type);
	}

	mw.visitInvokeDynamicInsn(TARGET_METHOD_NAME,
	TARGET_METHOD_SIGNATURE,
	bsm);

	mw.visitLabel(indyBootstrapEnd);
	mw.visitLabel(indyThrowableEnd);

	// No exception at all, throw error
	Label throwLabel = new Label();
	mw.visitJumpInsn(Opcodes.GOTO, throwLabel);

	// JDK-8079697 workaround: we have to generate stackmaps manually
	mw.visitFrame(Opcodes.F_SAME1, 0, new Object[0], 1, new Object[] { JL_BOOTSTRAPMETHODERROR });

	// Got a bootstrapmethoderror as expected, check that it is wrapping what we expect
	mw.visitLabel(catchBootstrapLabel);

	// Save error in case we need to rethrow it
	mw.visitInsn(Opcodes.DUP);
	mw.visitVarInsn(Opcodes.ASTORE, 1);
	mw.visitMethodInsn(Opcodes.INVOKEVIRTUAL, JL_THROWABLE, "getCause", "()" + fd(JL_THROWABLE));

	// If it is the expected exception, goto next block
	mw.visitTypeInsn(Opcodes.INSTANCEOF, WRAPPED_EXCEPTION);
	Label nextBlockLabel = new Label();
	mw.visitJumpInsn(Opcodes.IFNE, nextBlockLabel);

	// Not the exception we were expectiong, throw error
	mw.visitVarInsn(Opcodes.ALOAD, 1); // Use full chain as cause
	createThrowRuntimeExceptionCodeWithCause(mw,
	"invokedynamic got an unexpected wrapped exception (expected " + WRAPPED_EXCEPTION
	+ ", bootstrap type=" + type
	+ ", opcode=" + type.asmTag + ")!");

	// JDK-8079697 workaround: we have to generate stackmaps manually
	mw.visitFrame(Opcodes.F_SAME1, 0, new Object[0], 1, new Object[] { JL_THROWABLE });
	mw.visitLabel(catchThrowableLabel);

	// Save error in case we need to rethrow it
	mw.visitInsn(Opcodes.DUP);
	mw.visitVarInsn(Opcodes.ASTORE, 1);

	// If it is the expected exception, goto next block
	mw.visitTypeInsn(Opcodes.INSTANCEOF, DIRECT_ERROR);
	mw.visitJumpInsn(Opcodes.IFNE, nextBlockLabel);

	// Not the exception we were expectiong, throw error
	mw.visitVarInsn(Opcodes.ALOAD, 1); // Use full chain as cause
	createThrowRuntimeExceptionCodeWithCause(mw,
	"invokedynamic got an unexpected exception (expected " + DIRECT_ERROR
	+ ", bootstrap type" + type
	+ ", opcode=" + type.asmTag + ")!");

	// JDK-8079697 workaround: we have to generate stackmaps manually
	mw.visitFrame(Opcodes.F_CHOP, 0, new Object[0], 0, new Object[0]);

	// Unable to place this code once in the method epilog due to bug in ASM
	mw.visitLabel(throwLabel);
	createThrowRuntimeExceptionCode(mw,
	"invokedynamic should always throw (bootstrap type" + type +", opcode=" + type.asmTag + ")!");

	mw.visitFrame(Opcodes.F_SAME, 0, new Object[0], 0, new Object[0]);
	mw.visitLabel(nextBlockLabel);
	}
	}