List of usage examples for org.objectweb.asm Opcodes CHECKCAST
int CHECKCAST
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From source file:bytecode.InstructionExporter.java
License:Apache License
/** * Outputs type casting instructions./* ww w. j ava 2s .c o m*/ * * @param instruction Check cast instruction. * @return <code>null</code>. */ @Override public Void visit(CheckCast instruction) { mv.visitTypeInsn(Opcodes.CHECKCAST, instruction.getType().getDescriptor()); return null; }
From source file:bytecode.MethodImporter.java
License:Apache License
/** * Imports instructions with a single type operand (allocation of reference * arrays, allocation of objects, casting and type checks). * * @param opcode Opcode.//from w ww. j a v a 2 s .c om * @param descriptor String descriptor of the type operand. */ @Override public void visitTypeInsn(final int opcode, final String descriptor) { Type type = Type.getObjectType(descriptor); switch (opcode) { // News case Opcodes.ANEWARRAY: ordered.add(stack.push(new NewArray(type, stack.pop()))); break; case Opcodes.NEW: ordered.add(stack.push(new NewObject(type))); break; // Type Checks case Opcodes.CHECKCAST: ordered.add(stack.push(new CheckCast(stack.pop(), type))); break; case Opcodes.INSTANCEOF: ordered.add(stack.push(new InstanceOf(stack.pop(), type))); break; } }
From source file:cn.annoreg.asm.DelegateGenerator.java
License:Open Source License
public static MethodVisitor generateStaticMethod(ClassVisitor parentClass, MethodVisitor parent, String className, String methodName, String desc, final Side side) { //This method is a little bit complicated. //We need to generate a delegate class implementing NetworkCallDelegate and a redirect //the code that originally generated here in parent, into the delegate class, //by returning a MethodVisitor under the ClassVisitor of the delegate class. //Besides, we should generate a call to NetworkCallManager into parent. //Above is the original method. Now it has a little bit change. To allow private call in //here, we need to generate the delegate method in this class instead of in a delegate class. //We make the delegate method public so that the delegate class can call it. //delegateName is a string used by both sides to identify a network-call delegate. final String delegateName = className + ":" + methodName + ":" + desc; final Type[] args = Type.getArgumentTypes(desc); final Type ret = Type.getReturnType(desc); //Check types for (Type t : args) { //TODO support these types if (!t.getDescriptor().startsWith("L") && !t.getDescriptor().startsWith("[")) { throw new RuntimeException("Unsupported argument type in network call. in method " + methodName + ", " + t.getDescriptor()); }/*w w w . j a va2s. com*/ } if (!ret.equals(Type.VOID_TYPE)) { throw new RuntimeException( "Unsupported return value type in network call. " + "Only void is supported."); } //Generate call to NetworkCallManager in parent. parent.visitCode(); //First parameter parent.visitLdcInsn(delegateName); //Second parameter: object array pushIntegerConst(parent, args.length); //array size parent.visitTypeInsn(Opcodes.ANEWARRAY, Type.getInternalName(Object.class)); for (int i = 0; i < args.length; ++i) { parent.visitInsn(Opcodes.DUP); pushIntegerConst(parent, i); parent.visitVarInsn(Opcodes.ALOAD, i); parent.visitInsn(Opcodes.AASTORE); } //Call cn.annoreg.mc.network.NetworkCallManager.onNetworkCall parent.visitMethodInsn(Opcodes.INVOKESTATIC, Type.getInternalName(NetworkCallManager.class), "onNetworkCall", Type.getMethodDescriptor(Type.VOID_TYPE, Type.getType(String.class), Type.getType(Object[].class))); parent.visitInsn(Opcodes.RETURN); parent.visitMaxs(5, args.length); parent.visitEnd(); //Create delegate object. final ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES | ClassWriter.COMPUTE_MAXS); final String delegateId = Integer.toString(delegateNextID++); final Type delegateClassType = Type.getType("cn/annoreg/asm/NetworkCallDelegate_" + delegateId); cw.visit(Opcodes.V1_5, Opcodes.ACC_PUBLIC, delegateClassType.getInternalName(), null, Type.getInternalName(Object.class), new String[] { Type.getInternalName(NetworkCallDelegate.class) }); //package cn.annoreg.asm; //class NetworkCallDelegate_? implements NetworkCallDelegate { { MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, null); mv.visitCode(); mv.visitVarInsn(Opcodes.ALOAD, 0); mv.visitMethodInsn(Opcodes.INVOKESPECIAL, Type.getInternalName(Object.class), "<init>", "()V"); mv.visitInsn(Opcodes.RETURN); mv.visitMaxs(1, 1); mv.visitEnd(); } //public NetworkCallDelegate_?() {} final String delegateFunctionName = methodName + "_delegate_" + delegateId; { MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "invoke", Type.getMethodDescriptor(Type.VOID_TYPE, Type.getType(Object[].class)), null, null); mv.visitCode(); for (int i = 0; i < args.length; ++i) { mv.visitVarInsn(Opcodes.ALOAD, 1); //0 is this pushIntegerConst(mv, i); mv.visitInsn(Opcodes.AALOAD); mv.visitTypeInsn(Opcodes.CHECKCAST, args[i].getInternalName()); } mv.visitMethodInsn(Opcodes.INVOKESTATIC, //delegateClassType.getInternalName(), //changed to original class className.replace('.', '/'), delegateFunctionName, desc); mv.visitInsn(Opcodes.RETURN); mv.visitMaxs(args.length + 2, 2); mv.visitEnd(); } //@Override public void invoke(Object[] args) { // xxxx.xxxx_delegated_xxx((Type0) args[0], (Type1) args[1], ...); //} //The returned MethodVisitor will visit the original version of the method, //including its annotation, where we can get StorageOptions. return new MethodVisitor(Opcodes.ASM4, parentClass.visitMethod(Opcodes.ACC_PUBLIC + Opcodes.ACC_STATIC, delegateFunctionName, desc, null, null)) { //Remember storage options for each argument StorageOption.Option[] options = new StorageOption.Option[args.length]; int targetIndex = -1; StorageOption.Target.RangeOption range = StorageOption.Target.RangeOption.SINGLE; double sendRange = -1; { for (int i = 0; i < options.length; ++i) { options[i] = StorageOption.Option.NULL; //set default value } } @Override public AnnotationVisitor visitParameterAnnotation(final int parameter, String desc, boolean visible) { Type type = Type.getType(desc); if (type.equals(Type.getType(StorageOption.Data.class))) { options[parameter] = StorageOption.Option.DATA; } else if (type.equals(Type.getType(StorageOption.Instance.class))) { //INSTANCE as defualt options[parameter] = StorageOption.Option.INSTANCE; //Change to NULLABLE_INSTANCE if nullable set to true return new AnnotationVisitor(this.api, super.visitParameterAnnotation(parameter, desc, visible)) { @Override public void visit(String name, Object value) { if (name.equals("nullable")) { if ((Boolean) value == true) { options[parameter] = StorageOption.Option.NULLABLE_INSTANCE; } } super.visit(name, value); } }; } else if (type.equals(Type.getType(StorageOption.Update.class))) { options[parameter] = StorageOption.Option.UPDATE; } else if (type.equals(Type.getType(StorageOption.Null.class))) { options[parameter] = StorageOption.Option.NULL; } else if (type.equals(Type.getType(StorageOption.Target.class))) { if (!args[parameter].equals(Type.getType(EntityPlayer.class))) { throw new RuntimeException("Target annotation can only be used on EntityPlayer."); } if (targetIndex != -1) { throw new RuntimeException("You can not specify multiple targets."); } options[parameter] = StorageOption.Option.INSTANCE; targetIndex = parameter; return new AnnotationVisitor(this.api, super.visitParameterAnnotation(parameter, desc, visible)) { @Override public void visitEnum(String name, String desc, String value) { super.visitEnum(name, desc, value); range = StorageOption.Target.RangeOption.valueOf(value); } }; } else if (type.equals(Type.getType(StorageOption.RangedTarget.class))) { if (targetIndex != -1) { throw new RuntimeException("You can not specify multiple targets."); } range = null; targetIndex = parameter; return new AnnotationVisitor(this.api, super.visitParameterAnnotation(parameter, desc, visible)) { @Override public void visit(String name, Object value) { super.visit(name, value); sendRange = (double) value; } }; } return super.visitParameterAnnotation(parameter, desc, visible); } @Override public void visitEnd() { super.visitEnd(); //This is the last method in the delegate class. //Finish the class and do the registration. cw.visitEnd(); try { Class<?> clazz = classLoader.defineClass(delegateClassType.getClassName(), cw.toByteArray()); NetworkCallDelegate delegateObj = (NetworkCallDelegate) clazz.newInstance(); if (side == Side.CLIENT) { NetworkCallManager.registerClientDelegateClass(delegateName, delegateObj, options, targetIndex, range, sendRange); } else { NetworkCallManager.registerServerDelegateClass(delegateName, delegateObj, options); } } catch (Throwable e) { throw new RuntimeException("Can not create delegate for network call.", e); } } }; //public static void delegated(Type0 arg0, Type1, arg1, ...) { // //Code generated by caller. //} //} }
From source file:cn.annoreg.asm.DelegateGenerator.java
License:Open Source License
public static MethodVisitor generateNonStaticMethod(ClassVisitor parentClass, MethodVisitor parent, String className, String methodName, String desc, final Side side) { //convert desc to a non-static method form String nonstaticDesc;//from ww w .j a va 2 s. c o m { Type staticType = Type.getMethodType(desc); Type retType = staticType.getReturnType(); Type[] argsType = staticType.getArgumentTypes(); Type[] argsTypeWithThis = new Type[argsType.length + 1]; argsTypeWithThis[0] = Type.getType('L' + className.replace('.', '/') + ';'); System.arraycopy(argsType, 0, argsTypeWithThis, 1, argsType.length); nonstaticDesc = Type.getMethodDescriptor(retType, argsTypeWithThis); } //delegateName is a string used by both sides to identify a network-call delegate. final String delegateName = className + ":" + methodName + ":" + desc; final Type[] args = Type.getArgumentTypes(nonstaticDesc); final Type ret = Type.getReturnType(nonstaticDesc); //Check types for (Type t : args) { //TODO support these types if (!t.getDescriptor().startsWith("L") && !t.getDescriptor().startsWith("[")) { throw new RuntimeException("Unsupported argument type in network call. "); } } if (!ret.equals(Type.VOID_TYPE)) { throw new RuntimeException( "Unsupported return value type in network call. " + "Only void is supported."); } //Generate call to NetworkCallManager in parent. parent.visitCode(); //First parameter parent.visitLdcInsn(delegateName); //Second parameter: object array pushIntegerConst(parent, args.length); //this (0) has been included parent.visitTypeInsn(Opcodes.ANEWARRAY, "java/lang/Object"); for (int i = 0; i < args.length; ++i) { parent.visitInsn(Opcodes.DUP); pushIntegerConst(parent, i); parent.visitVarInsn(Opcodes.ALOAD, i); parent.visitInsn(Opcodes.AASTORE); } //Call cn.annoreg.mc.network.NetworkCallManager.onNetworkCall parent.visitMethodInsn(Opcodes.INVOKESTATIC, Type.getInternalName(NetworkCallManager.class), "onNetworkCall", "(Ljava/lang/String;[Ljava/lang/Object;)V"); parent.visitInsn(Opcodes.RETURN); parent.visitMaxs(5, args.length); parent.visitEnd(); //Create delegate object. final ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES | ClassWriter.COMPUTE_MAXS); final String delegateId = Integer.toString(delegateNextID++); final Type delegateClassType = Type.getType("cn/annoreg/asm/NetworkCallDelegate_" + delegateId); cw.visit(Opcodes.V1_5, Opcodes.ACC_PUBLIC, delegateClassType.getInternalName(), null, Type.getInternalName(Object.class), new String[] { Type.getInternalName(NetworkCallDelegate.class) }); //package cn.annoreg.asm; //class NetworkCallDelegate_? implements NetworkCallDelegate { { MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, null); mv.visitCode(); mv.visitVarInsn(Opcodes.ALOAD, 0); mv.visitMethodInsn(Opcodes.INVOKESPECIAL, Type.getInternalName(Object.class), "<init>", "()V"); mv.visitInsn(Opcodes.RETURN); mv.visitMaxs(1, 1); mv.visitEnd(); } //public NetworkCallDelegate_?() {} final String delegateMethodName = methodName + "_delegate_" + delegateId; { MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "invoke", Type.getMethodDescriptor(Type.VOID_TYPE, Type.getType(Object[].class)), null, null); mv.visitCode(); //check if this is null mv.visitVarInsn(Opcodes.ALOAD, 1); //0 is this pushIntegerConst(mv, 0); mv.visitInsn(Opcodes.AALOAD); Label lblEnd = new Label(); mv.visitJumpInsn(Opcodes.IFNULL, lblEnd); for (int i = 0; i < args.length; ++i) { mv.visitVarInsn(Opcodes.ALOAD, 1); //0 is this pushIntegerConst(mv, i); mv.visitInsn(Opcodes.AALOAD); mv.visitTypeInsn(Opcodes.CHECKCAST, args[i].getInternalName()); } mv.visitMethodInsn(Opcodes.INVOKESTATIC, //delegateClassType.getInternalName(), className.replace('.', '/'), delegateMethodName, nonstaticDesc); mv.visitLabel(lblEnd); mv.visitInsn(Opcodes.RETURN); mv.visitMaxs(args.length + 2, 2); mv.visitEnd(); } //@Override public void invoke(Object[] args) { // delegated((Type0) args[0], (Type1) args[1], ...); //} //The returned MethodVisitor will visit the original version of the method, //including its annotation, where we can get StorageOptions. return new MethodVisitor(Opcodes.ASM4, parentClass.visitMethod(Opcodes.ACC_PUBLIC + Opcodes.ACC_STATIC, delegateMethodName, nonstaticDesc, null, null)) { //Remember storage options for each argument StorageOption.Option[] options = new StorageOption.Option[args.length]; int targetIndex = -1; double sendRange = -1; StorageOption.Target.RangeOption range = StorageOption.Target.RangeOption.SINGLE; { for (int i = 0; i < options.length; ++i) { options[i] = StorageOption.Option.NULL; //set default value } options[0] = StorageOption.Option.INSTANCE; } @Override public AnnotationVisitor visitParameterAnnotation(int parameter_in_func, String desc, boolean visible) { final int parameter = parameter_in_func + 1; //skip this Type type = Type.getType(desc); if (type.equals(Type.getType(StorageOption.Data.class))) { options[parameter] = StorageOption.Option.DATA; } else if (type.equals(Type.getType(StorageOption.Instance.class))) { //INSTANCE as defualt options[parameter] = StorageOption.Option.INSTANCE; //Change to NULLABLE_INSTANCE if nullable set to true return new AnnotationVisitor(this.api, super.visitParameterAnnotation(parameter, desc, visible)) { @Override public void visit(String name, Object value) { if (name.equals("nullable")) { if ((Boolean) value == true) { options[parameter] = StorageOption.Option.NULLABLE_INSTANCE; } } super.visit(name, value); } }; } else if (type.equals(Type.getType(StorageOption.Update.class))) { options[parameter] = StorageOption.Option.UPDATE; } else if (type.equals(Type.getType(StorageOption.Null.class))) { options[parameter] = StorageOption.Option.NULL; } else if (type.equals(Type.getType(StorageOption.Target.class))) { if (!args[parameter].equals(Type.getType(EntityPlayer.class))) { throw new RuntimeException("Target annotation can only be used on EntityPlayer."); } if (targetIndex != -1) { throw new RuntimeException("You can not specify multiple targets."); } options[parameter] = StorageOption.Option.INSTANCE; targetIndex = parameter; return new AnnotationVisitor(this.api, super.visitParameterAnnotation(parameter, desc, visible)) { @Override public void visitEnum(String name, String desc, String value) { super.visitEnum(name, desc, value); range = StorageOption.Target.RangeOption.valueOf(value); } }; } else if (type.equals(Type.getType(StorageOption.RangedTarget.class))) { if (targetIndex != -1) { throw new RuntimeException("You can not specify multiple targets."); } targetIndex = parameter; range = null; return new AnnotationVisitor(this.api, super.visitParameterAnnotation(parameter, desc, visible)) { @Override public void visit(String name, Object value) { super.visit(name, value); sendRange = (double) value; } }; } return super.visitParameterAnnotation(parameter, desc, visible); } //TODO this option (from annotation) @Override public void visitEnd() { super.visitEnd(); //This is the last method in the delegate class. //Finish the class and do the registration. cw.visitEnd(); try { Class<?> clazz = classLoader.defineClass(delegateClassType.getClassName(), cw.toByteArray()); NetworkCallDelegate delegateObj = (NetworkCallDelegate) clazz.newInstance(); if (side == Side.CLIENT) { NetworkCallManager.registerClientDelegateClass(delegateName, delegateObj, options, targetIndex, range, sendRange); } else { NetworkCallManager.registerServerDelegateClass(delegateName, delegateObj, options); } } catch (Throwable e) { throw new RuntimeException("Can not create delegate for network call.", e); } } }; //public static void delegated(Type0 arg0, Type1, arg1, ...) { // //Code generated by caller. //} //} }
From source file:co.paralleluniverse.fibers.instrument.InstrumentMethod.java
License:Open Source License
private void emitRestoreValue(MethodVisitor mv, BasicValue v, int lvarStack, int idx, int lvar) { mv.visitVarInsn(Opcodes.ALOAD, lvarStack); emitConst(mv, idx);//from w w w . j ava 2 s.c om switch (v.getType().getSort()) { case Type.OBJECT: String internalName = v.getType().getInternalName(); mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, STACK_NAME, "getObject", "(I)Ljava/lang/Object;"); if (!internalName.equals("java/lang/Object")) // don't cast to Object ;) mv.visitTypeInsn(Opcodes.CHECKCAST, internalName); // println(mv, "RESTORE " + (lvar >= 0 ? ("VAR " + lvar + ": ") : "OPRND: ")); break; case Type.ARRAY: mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, STACK_NAME, "getObject", "(I)Ljava/lang/Object;"); mv.visitTypeInsn(Opcodes.CHECKCAST, v.getType().getDescriptor()); break; case Type.BYTE: mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, STACK_NAME, "getInt", "(I)I"); mv.visitInsn(Opcodes.I2B); break; case Type.SHORT: mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, STACK_NAME, "getInt", "(I)I"); mv.visitInsn(Opcodes.I2S); break; case Type.CHAR: mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, STACK_NAME, "getInt", "(I)I"); mv.visitInsn(Opcodes.I2C); break; case Type.BOOLEAN: case Type.INT: mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, STACK_NAME, "getInt", "(I)I"); break; case Type.FLOAT: mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, STACK_NAME, "getFloat", "(I)F"); break; case Type.LONG: mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, STACK_NAME, "getLong", "(I)J"); break; case Type.DOUBLE: mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, STACK_NAME, "getDouble", "(I)D"); break; default: throw new InternalError("Unexpected type: " + v.getType()); } }
From source file:com.android.build.gradle.internal.incremental.ConstructorArgsRedirection.java
License:Apache License
@Override protected void restore(GeneratorAdapter mv, List<Type> args) { // At this point, init$args has been called and the result Object is on the stack. // The value of that Object is Object[] with exactly n + 1 elements. // The first element is a string with the qualified name of the constructor to call. // The remaining elements are the constructtor arguments. // Create a new local that holds the result of init$args call. mv.visitTypeInsn(Opcodes.CHECKCAST, "[Ljava/lang/Object;"); int constructorArgs = mv.newLocal(Type.getType("[Ljava/lang/Object;")); mv.storeLocal(constructorArgs);/*from w ww.j a v a 2 s .co m*/ // Reinstate local values mv.loadLocal(locals); int stackIndex = 0; for (int arrayIndex = 0; arrayIndex < args.size(); arrayIndex++) { Type arg = args.get(arrayIndex); // Do not restore "this" if (arrayIndex > 0) { // duplicates the array mv.dup(); // index in the array of objects to restore the boxed parameter. mv.push(arrayIndex); // get it from the array mv.arrayLoad(Type.getType(Object.class)); // unbox the argument ByteCodeUtils.unbox(mv, arg); // restore the argument mv.visitVarInsn(arg.getOpcode(Opcodes.ISTORE), stackIndex); } // stack index must progress according to the parameter type we just processed. stackIndex += arg.getSize(); } // pops the array mv.pop(); // Push a null for the marker parameter. mv.loadLocal(constructorArgs); mv.visitInsn(Opcodes.ACONST_NULL); // Invoke the constructor mv.visitMethodInsn(Opcodes.INVOKESPECIAL, thisClassName, "<init>", DISPATCHING_THIS_SIGNATURE, false); mv.goTo(end.getLabel()); }
From source file:com.android.build.gradle.internal.incremental.ConstructorRedirection.java
License:Apache License
@Override protected void doRedirect(GeneratorAdapter mv, int change) { mv.loadLocal(change);// ww w.jav a 2 s . co m mv.push("init$args." + constructor.args.desc); Type arrayType = Type.getType("[Ljava/lang/Object;"); // init$args args (including this) + locals mv.push(types.size() + 1); mv.newArray(Type.getType(Object.class)); int array = mv.newLocal(arrayType); mv.dup(); mv.storeLocal(array); // "this" is not ready yet, use null instead. mv.dup(); mv.push(0); mv.visitInsn(Opcodes.ACONST_NULL); mv.arrayStore(Type.getType(Object.class)); // Set the arguments in positions 1..(n-1); ByteCodeUtils.loadVariableArray(mv, ByteCodeUtils.toLocalVariables(types), 1); // Skip the this value // Add the locals array at the last position. mv.dup(); // The index of the last position of the array. mv.push(types.size()); // Create the array with all the local variables declared up to this point. ByteCodeUtils.newVariableArray(mv, constructor.variables.subList(0, constructor.localsAtLoadThis)); mv.arrayStore(Type.getType(Object.class)); mv.invokeInterface(IncrementalVisitor.CHANGE_TYPE, Method.getMethod("Object access$dispatch(String, Object[])")); mv.visitTypeInsn(Opcodes.CHECKCAST, "[Ljava/lang/Object;"); //// At this point, init$args has been called and the result Object is on the stack. //// The value of that Object is Object[] with exactly n + 2 elements. //// The first element is the resulting local variables //// The second element is a string with the qualified name of the constructor to call. //// The remaining elements are the constructor arguments. // Keep a reference to the new locals array mv.dup(); mv.push(0); mv.arrayLoad(Type.getType("[Ljava/lang/Object;")); mv.visitTypeInsn(Opcodes.CHECKCAST, "[Ljava/lang/Object;"); mv.storeLocal(array); // Call super constructor // Put this behind the returned array mv.visitVarInsn(Opcodes.ALOAD, 0); mv.swap(); // Push a null for the marker parameter. mv.visitInsn(Opcodes.ACONST_NULL); // Invoke the constructor mv.visitMethodInsn(Opcodes.INVOKESPECIAL, constructor.owner, "<init>", DISPATCHING_THIS_SIGNATURE, false); // Dispatch to init$body mv.loadLocal(change); mv.push("init$body." + constructor.body.desc); mv.loadLocal(array); // Now "this" can be set mv.dup(); mv.push(0); mv.visitVarInsn(Opcodes.ALOAD, 0); mv.arrayStore(Type.getType(Object.class)); mv.invokeInterface(IncrementalVisitor.CHANGE_TYPE, Method.getMethod("Object access$dispatch(String, Object[])")); mv.pop(); }
From source file:com.android.build.gradle.internal2.incremental.ConstructorRedirection.java
License:Apache License
@Override protected void doRedirect(GeneratorAdapter mv, int change) { mv.loadLocal(change);/*from ww w. ja va2 s .c o m*/ mv.push("init$args." + constructor.args.desc); Type arrayType = Type.getType("[Ljava/lang/Object;"); // init$args args (including this) + locals mv.push(types.size() + 1); mv.newArray(Type.getType(Object.class)); int array = mv.newLocal(arrayType); mv.dup(); mv.storeLocal(array); // "this" is not ready yet, use null instead. mv.dup(); mv.push(0); mv.visitInsn(Opcodes.ACONST_NULL); mv.arrayStore(Type.getType(Object.class)); // Set the arguments in positions 1..(n-1); ByteCodeUtils.loadVariableArray(mv, ByteCodeUtils.toLocalVariables(types), 1); // Skip the this value // Add the locals array at the last position. mv.dup(); // The index of the last position of the array. mv.push(types.size()); // Create the array with all the local variables declared up to this point. ByteCodeUtils.newVariableArray(mv, constructor.variables.subList(0, constructor.localsAtLoadThis)); mv.arrayStore(Type.getType(Object.class)); mv.invokeInterface(IncrementalVisitor.CHANGE_TYPE, Method.getMethod("Object access$dispatch(String, Object[])")); mv.visitTypeInsn(Opcodes.CHECKCAST, "[Ljava/lang/Object;"); //// At this point, init$args has been called and the result Object is on the stack. //// The value of that Object is Object[] with exactly n + 2 elements. //// The first element is the resulting local variables //// The second element is a string with the qualified name of the constructor to call. //// The remaining elements are the constructor arguments. // Keep a reference to the new locals array mv.dup(); mv.push(0); mv.arrayLoad(Type.getType("[Ljava/lang/Object;")); mv.visitTypeInsn(Opcodes.CHECKCAST, "[Ljava/lang/Object;"); mv.storeLocal(array); // Call super constructor // Put this behind the returned array mv.visitVarInsn(Opcodes.ALOAD, 0); mv.swap(); // Push a null for the marker parameter. mv.visitInsn(Opcodes.ACONST_NULL); // Invoke the constructor mv.visitMethodInsn(Opcodes.INVOKESPECIAL, constructor.owner, ByteCodeUtils.CONSTRUCTOR, DISPATCHING_THIS_SIGNATURE, false); // { // // FIXME: Opcodes.INVOKESPECIAL??????this?,????? // mv.visitVarInsn(Opcodes.ALOAD, 0); // // List<LocalVariable> variables = ByteCodeUtils.toLocalVariables(types); // for (int i = 1; i < variables.size(); i++) { // LocalVariable variable = variables.get(i); // // Duplicates the array on the stack; // mv.loadLocal(array); // // Sets up the index // mv.push(i + 1); // // Gets the Object value // mv.arrayLoad(Type.getType(Object.class)); // mv.unbox(variable.type); // } // mv.visitMethodInsn(Opcodes.INVOKESPECIAL, constructor.owner, ByteCodeUtils.CONSTRUCTOR, constructor.originConstructor.desc, false); // } // Dispatch to init$body mv.loadLocal(change); mv.push("init$body." + constructor.body.desc); mv.loadLocal(array); // Now "this" can be set mv.dup(); mv.push(0); mv.visitVarInsn(Opcodes.ALOAD, 0); mv.arrayStore(Type.getType(Object.class)); mv.invokeInterface(IncrementalVisitor.CHANGE_TYPE, Method.getMethod("Object access$dispatch(String, Object[])")); mv.pop(); }
From source file:com.android.tools.layoutlib.create.StubMethodAdapter.java
License:Apache License
private void generateInvoke() { /* Generates the code: * OverrideMethod.invoke("signature", mIsNative ? true : false, null or this); */// w w w . j a v a 2 s. co m mParentVisitor.visitLdcInsn(mInvokeSignature); // push true or false mParentVisitor.visitInsn(mIsNative ? Opcodes.ICONST_1 : Opcodes.ICONST_0); // push null or this if (mIsStatic) { mParentVisitor.visitInsn(Opcodes.ACONST_NULL); } else { mParentVisitor.visitVarInsn(Opcodes.ALOAD, 0); } int sort = mReturnType != null ? mReturnType.getSort() : Type.VOID; switch (sort) { case Type.VOID: mParentVisitor.visitMethodInsn(Opcodes.INVOKESTATIC, "com/android/tools/layoutlib/create/OverrideMethod", "invokeV", "(Ljava/lang/String;ZLjava/lang/Object;)V"); mParentVisitor.visitInsn(Opcodes.RETURN); break; case Type.BOOLEAN: case Type.CHAR: case Type.BYTE: case Type.SHORT: case Type.INT: mParentVisitor.visitMethodInsn(Opcodes.INVOKESTATIC, "com/android/tools/layoutlib/create/OverrideMethod", "invokeI", "(Ljava/lang/String;ZLjava/lang/Object;)I"); switch (sort) { case Type.BOOLEAN: Label l1 = new Label(); mParentVisitor.visitJumpInsn(Opcodes.IFEQ, l1); mParentVisitor.visitInsn(Opcodes.ICONST_1); mParentVisitor.visitInsn(Opcodes.IRETURN); mParentVisitor.visitLabel(l1); mParentVisitor.visitInsn(Opcodes.ICONST_0); break; case Type.CHAR: mParentVisitor.visitInsn(Opcodes.I2C); break; case Type.BYTE: mParentVisitor.visitInsn(Opcodes.I2B); break; case Type.SHORT: mParentVisitor.visitInsn(Opcodes.I2S); break; } mParentVisitor.visitInsn(Opcodes.IRETURN); break; case Type.LONG: mParentVisitor.visitMethodInsn(Opcodes.INVOKESTATIC, "com/android/tools/layoutlib/create/OverrideMethod", "invokeL", "(Ljava/lang/String;ZLjava/lang/Object;)J"); mParentVisitor.visitInsn(Opcodes.LRETURN); break; case Type.FLOAT: mParentVisitor.visitMethodInsn(Opcodes.INVOKESTATIC, "com/android/tools/layoutlib/create/OverrideMethod", "invokeF", "(Ljava/lang/String;ZLjava/lang/Object;)F"); mParentVisitor.visitInsn(Opcodes.FRETURN); break; case Type.DOUBLE: mParentVisitor.visitMethodInsn(Opcodes.INVOKESTATIC, "com/android/tools/layoutlib/create/OverrideMethod", "invokeD", "(Ljava/lang/String;ZLjava/lang/Object;)D"); mParentVisitor.visitInsn(Opcodes.DRETURN); break; case Type.ARRAY: case Type.OBJECT: mParentVisitor.visitMethodInsn(Opcodes.INVOKESTATIC, "com/android/tools/layoutlib/create/OverrideMethod", "invokeA", "(Ljava/lang/String;ZLjava/lang/Object;)Ljava/lang/Object;"); mParentVisitor.visitTypeInsn(Opcodes.CHECKCAST, mReturnType.getInternalName()); mParentVisitor.visitInsn(Opcodes.ARETURN); break; } }
From source file:com.asakusafw.dag.compiler.builtin.FoldOperatorGenerator.java
License:Apache License
private ClassDescription generateCombinerClass(Context context, UserOperator operator, ClassDescription outer) { ClassDescription target = getCombinerName(outer); OperatorInput input = operator.getInput(0); ClassWriter writer = newWriter(target, Object.class, ObjectCombiner.class); writer.visitOuterClass(outer.getInternalName(), target.getInternalName(), null); FieldRef impl = defineOperatorField(writer, operator, target); defineEmptyConstructor(writer, Object.class, method -> { setOperatorField(method, operator, impl); });/* w w w .j a va 2 s. c om*/ defineBuildKey(context, writer, input.getDataType(), input.getGroup()); MethodVisitor method = writer.visitMethod(Opcodes.ACC_PUBLIC, "combine", Type.getMethodDescriptor(Type.VOID_TYPE, typeOf(Object.class), typeOf(Object.class)), null, null); List<ValueRef> arguments = new ArrayList<>(); arguments.add(impl); arguments.add(m -> { m.visitVarInsn(Opcodes.ALOAD, 1); m.visitTypeInsn(Opcodes.CHECKCAST, typeOf(input.getDataType()).getInternalName()); }); arguments.add(m -> { m.visitVarInsn(Opcodes.ALOAD, 2); m.visitTypeInsn(Opcodes.CHECKCAST, typeOf(input.getDataType()).getInternalName()); }); for (VertexElement dep : context.getDependencies(operator.getArguments())) { Invariants.require(dep.getElementKind() == ElementKind.VALUE); ValueDescription value = ((ValueElement) dep).getValue(); arguments.add(m -> { getConst(method, Invariants.safe(() -> value.resolve(context.getClassLoader()))); }); } invoke(method, context, operator, arguments); method.visitInsn(Opcodes.RETURN); method.visitMaxs(0, 0); method.visitEnd(); return context.addClassFile(new ClassData(target, writer::toByteArray)); }