List of usage examples for org.objectweb.asm Opcodes CHECKCAST
int CHECKCAST
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From source file:edu.illinois.nondex.instr.WeakHashMapShufflingAdder.java
License:Open Source License
public void addNextEntry() { MethodVisitor mv = super.visitMethod(Opcodes.ACC_PUBLIC, "nextEntry", "()Ljava/util/WeakHashMap$Entry;", "()Ljava/util/WeakHashMap$Entry<TK;TV;>;", null); mv.visitCode();//from ww w .ja v a 2s . c o m mv.visitVarInsn(Opcodes.ALOAD, 0); mv.visitFieldInsn(Opcodes.GETFIELD, "java/util/WeakHashMap$HashIterator", "this$0", "Ljava/util/WeakHashMap;"); mv.visitFieldInsn(Opcodes.GETFIELD, "java/util/WeakHashMap", "modCount", "I"); mv.visitVarInsn(Opcodes.ALOAD, 0); mv.visitFieldInsn(Opcodes.GETFIELD, "java/util/WeakHashMap$HashIterator", "expectedModCount", "I"); Label l0 = new Label(); mv.visitJumpInsn(Opcodes.IF_ICMPEQ, l0); mv.visitTypeInsn(Opcodes.NEW, "java/util/ConcurrentModificationException"); mv.visitInsn(Opcodes.DUP); mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/util/ConcurrentModificationException", "<init>", "()V", false); mv.visitInsn(Opcodes.ATHROW); mv.visitLabel(l0); mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null); mv.visitVarInsn(Opcodes.ALOAD, 0); mv.visitVarInsn(Opcodes.ALOAD, 0); mv.visitFieldInsn(Opcodes.GETFIELD, "java/util/WeakHashMap$HashIterator", "iter", "Ljava/util/Iterator;"); mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, "java/util/Iterator", "next", "()Ljava/lang/Object;", true); mv.visitTypeInsn(Opcodes.CHECKCAST, "java/util/WeakHashMap$Entry"); mv.visitFieldInsn(Opcodes.PUTFIELD, "java/util/WeakHashMap$HashIterator", "lastReturned", "Ljava/util/WeakHashMap$Entry;"); mv.visitVarInsn(Opcodes.ALOAD, 0); mv.visitVarInsn(Opcodes.ALOAD, 0); mv.visitFieldInsn(Opcodes.GETFIELD, "java/util/WeakHashMap$HashIterator", "lastReturned", "Ljava/util/WeakHashMap$Entry;"); mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/util/WeakHashMap$Entry", "get", "()Ljava/lang/Object;", false); mv.visitFieldInsn(Opcodes.PUTFIELD, "java/util/WeakHashMap$HashIterator", "currentKey", "Ljava/lang/Object;"); mv.visitVarInsn(Opcodes.ALOAD, 0); mv.visitFieldInsn(Opcodes.GETFIELD, "java/util/WeakHashMap$HashIterator", "lastReturned", "Ljava/util/WeakHashMap$Entry;"); mv.visitInsn(Opcodes.ARETURN); mv.visitMaxs(2, 1); mv.visitEnd(); }
From source file:edu.mit.streamjit.util.bytecode.MethodResolver.java
License:Open Source License
private void interpret(TypeInsnNode insn, FrameState frame, BBInfo block) { Klass k = getKlassByInternalName(insn.desc); ReferenceType t = typeFactory.getReferenceType(k); switch (insn.getOpcode()) { case Opcodes.NEW: UninitializedValue newValue = newValues.get(insn); assert newValue != null; assert newValue.getType().equals(t); frame.stack.push(newValue);//from w w w .j a v a 2s .com break; case Opcodes.CHECKCAST: CastInst c = new CastInst(t, frame.stack.pop()); block.block.instructions().add(c); frame.stack.push(c); break; case Opcodes.INSTANCEOF: InstanceofInst ioi = new InstanceofInst(t, frame.stack.pop()); block.block.instructions().add(ioi); frame.stack.push(ioi); break; case Opcodes.ANEWARRAY: ArrayType at = typeFactory.getArrayType(module.getArrayKlass(k, 1)); NewArrayInst nai = new NewArrayInst(at, frame.stack.pop()); block.block.instructions().add(nai); frame.stack.push(nai); break; default: throw new UnsupportedOperationException("" + insn.getOpcode()); } }
From source file:edu.mit.streamjit.util.bytecode.MethodUnresolver.java
License:Open Source License
private void emit(CastInst i, InsnList insns) { load(i.getOperand(0), insns);/*from w w w . j av a2 s. c om*/ if (i.getType() instanceof ReferenceType) { insns.add(new TypeInsnNode(Opcodes.CHECKCAST, internalName(((ReferenceType) i.getType()).getKlass()))); } else { PrimitiveType from = (PrimitiveType) i.getOperand(0).getType(); PrimitiveType to = (PrimitiveType) i.getType(); for (int op : from.getCastOpcode(to)) insns.add(new InsnNode(op)); } store(i, insns); }
From source file:edu.ubc.mirrors.holograms.HologramClassGenerator.java
License:Open Source License
@Override public void visitEnd() { // Generate the static field used to store the corresponding ClassMirror int staticAccess = Opcodes.ACC_PUBLIC | Opcodes.ACC_FINAL | Opcodes.ACC_STATIC; super.visitField(staticAccess, "classMirror", classMirrorType.getDescriptor(), null, null); // Generate the constructor that takes a mirror instance as an Object parameter String constructorDesc = Type.getMethodDescriptor(Type.VOID_TYPE, Type.getType(Object.class)); if (name.equals(getHologramType(Type.getType(Throwable.class), true).getInternalName())) { // This doesn't extend ObjectHologram so we have to set the field directly super.visitField(Opcodes.ACC_PUBLIC, "mirror", objectMirrorType.getDescriptor(), null, null); MethodVisitor methodVisitor = super.visitMethod(Opcodes.ACC_PUBLIC, "<init>", constructorDesc, null, null);/*from w ww .j ava2 s . co m*/ methodVisitor.visitCode(); methodVisitor.visitVarInsn(Opcodes.ALOAD, 0); methodVisitor.visitMethodInsn(Opcodes.INVOKESPECIAL, superName, "<init>", Type.getMethodDescriptor(Type.VOID_TYPE)); methodVisitor.visitVarInsn(Opcodes.ALOAD, 0); methodVisitor.visitVarInsn(Opcodes.ALOAD, 1); methodVisitor.visitTypeInsn(Opcodes.CHECKCAST, objectMirrorType.getInternalName()); methodVisitor.visitFieldInsn(Opcodes.PUTFIELD, name, "mirror", Type.getDescriptor(ObjectMirror.class)); methodVisitor.visitInsn(Opcodes.RETURN); methodVisitor.visitMaxs(2, 2); methodVisitor.visitEnd(); methodVisitor = super.visitMethod(Opcodes.ACC_PUBLIC, "getMirror", Type.getMethodDescriptor(objectMirrorType), null, null); methodVisitor.visitCode(); methodVisitor.visitVarInsn(Opcodes.ALOAD, 0); methodVisitor.visitFieldInsn(Opcodes.GETFIELD, name, "mirror", Type.getDescriptor(ObjectMirror.class)); methodVisitor.visitInsn(Opcodes.ARETURN); methodVisitor.visitMaxs(1, 1); methodVisitor.visitEnd(); } else if (!isInterface) { MethodVisitor methodVisitor = super.visitMethod(Opcodes.ACC_PUBLIC, "<init>", constructorDesc, null, null); methodVisitor.visitCode(); methodVisitor.visitVarInsn(Opcodes.ALOAD, 0); methodVisitor.visitVarInsn(Opcodes.ALOAD, 1); methodVisitor.visitMethodInsn(Opcodes.INVOKESPECIAL, superName, "<init>", constructorDesc); methodVisitor.visitInsn(Opcodes.RETURN); methodVisitor.visitMaxs(2, 2); methodVisitor.visitEnd(); } // Add a class initialization method to initialize the static fields, // if one doesn't exist already. if (!hasClinit) { InstructionAdapter mv = new InstructionAdapter( super.visitMethod(Opcodes.ACC_PUBLIC | Opcodes.ACC_STATIC, "<clinit>", "()V", null, null)); mv.visitCode(); HologramMethodGenerator.initializeStaticFields(Type.getObjectType(this.name), mv); mv.areturn(Type.VOID_TYPE); mv.visitMaxs(2, 2); mv.visitEnd(); } super.visitEnd(); }
From source file:erjang.EFun.java
License:Apache License
private static void make_cast_method(ClassWriter cw, int n) { MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC | Opcodes.ACC_STATIC, "cast", "(" + EOBJECT_DESC + ")L" + EFUN_NAME + n + ";", null, null); mv.visitCode();/*from w w w .j av a 2 s . com*/ mv.visitVarInsn(Opcodes.ALOAD, 0); mv.visitTypeInsn(INSTANCEOF, EFUN_NAME + n); Label fail = new Label(); mv.visitJumpInsn(Opcodes.IFEQ, fail); mv.visitVarInsn(Opcodes.ALOAD, 0); mv.visitTypeInsn(Opcodes.CHECKCAST, EFUN_NAME + n); mv.visitInsn(Opcodes.ARETURN); mv.visitLabel(fail); mv.visitInsn(Opcodes.ACONST_NULL); mv.visitInsn(Opcodes.ARETURN); mv.visitMaxs(2, 2); mv.visitEnd(); }
From source file:erjang.ETuple.java
License:Apache License
private static void create_cast(ClassAdapter cw, int n) { MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC | Opcodes.ACC_STATIC, "cast", "(L" + ETUPLE_NAME + ";)L" + ETUPLE_NAME + n + ";", null, null); mv.visitCode();/* w w w .j av a 2s . c om*/ mv.visitVarInsn(Opcodes.ALOAD, 0); mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, ETUPLE_NAME, "arity", "()I"); if (n <= 5) { mv.visitInsn(Opcodes.ICONST_0 + n); } else { mv.visitLdcInsn(new Integer(n)); } Label fail = new Label(); mv.visitJumpInsn(Opcodes.IF_ICMPNE, fail); mv.visitVarInsn(Opcodes.ALOAD, 0); mv.visitTypeInsn(Opcodes.CHECKCAST, ETUPLE_NAME + n); mv.visitInsn(Opcodes.ARETURN); mv.visitLabel(fail); mv.visitInsn(Opcodes.ACONST_NULL); mv.visitInsn(Opcodes.ARETURN); mv.visitMaxs(2, 2); mv.visitEnd(); }
From source file:erjang.ETuple.java
License:Apache License
private static void create_cast2(ClassAdapter cw, int n) { MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC | Opcodes.ACC_STATIC, "cast", "(L" + Type.getInternalName(EObject.class) + ";)L" + ETUPLE_NAME + n + ";", null, null); mv.visitCode();/* w w w . jav a 2 s . co m*/ mv.visitVarInsn(Opcodes.ALOAD, 0); mv.visitInsn(Opcodes.DUP); mv.visitTypeInsn(Opcodes.INSTANCEOF, ETUPLE_NAME + n); Label fail = new Label(); mv.visitJumpInsn(Opcodes.IFEQ, fail); mv.visitVarInsn(Opcodes.ALOAD, 0); mv.visitTypeInsn(Opcodes.CHECKCAST, ETUPLE_NAME + n); mv.visitInsn(Opcodes.ARETURN); mv.visitLabel(fail); mv.visitInsn(Opcodes.ACONST_NULL); mv.visitInsn(Opcodes.ARETURN); mv.visitMaxs(2, 2); mv.visitEnd(); }
From source file:gnu.classpath.tools.rmic.ClassRmicCompiler.java
License:Open Source License
private void generateStub() throws IOException { stubname = fullclassname + "_Stub"; String stubclassname = classname + "_Stub"; File file = new File((destination == null ? "." : destination) + File.separator + stubname.replace('.', File.separatorChar) + ".class"); if (verbose)//from ww w . j av a 2 s . c om System.out.println("[Generating class " + stubname + "]"); final ClassWriter stub = new ClassWriter(true); classInternalName = stubname.replace('.', '/'); final String superInternalName = Type.getType(RemoteStub.class).getInternalName(); String[] remoteInternalNames = internalNameArray((Class[]) mRemoteInterfaces.toArray(new Class[] {})); stub.visit(Opcodes.V1_2, Opcodes.ACC_PUBLIC + Opcodes.ACC_FINAL, classInternalName, null, superInternalName, remoteInternalNames); if (need12Stubs) { stub.visitField(Opcodes.ACC_PRIVATE + Opcodes.ACC_STATIC + Opcodes.ACC_FINAL, "serialVersionUID", Type.LONG_TYPE.getDescriptor(), null, new Long(2L)); } if (need11Stubs) { stub.visitField(Opcodes.ACC_PRIVATE + Opcodes.ACC_STATIC + Opcodes.ACC_FINAL, "interfaceHash", Type.LONG_TYPE.getDescriptor(), null, new Long(RMIHashes.getInterfaceHash(clazz))); if (need12Stubs) { stub.visitField(Opcodes.ACC_PRIVATE + Opcodes.ACC_STATIC, "useNewInvoke", Type.BOOLEAN_TYPE.getDescriptor(), null, null); } stub.visitField(Opcodes.ACC_PRIVATE + Opcodes.ACC_STATIC + Opcodes.ACC_FINAL, "operations", Type.getDescriptor(Operation[].class), null, null); } // Set of method references. if (need12Stubs) { for (int i = 0; i < remotemethods.length; i++) { Method m = remotemethods[i].meth; String slotName = "$method_" + m.getName() + "_" + i; stub.visitField(Opcodes.ACC_PRIVATE + Opcodes.ACC_STATIC, slotName, Type.getDescriptor(Method.class), null, null); } } MethodVisitor clinit = stub.visitMethod(Opcodes.ACC_STATIC, "<clinit>", Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] {}), null, null); if (need11Stubs) { fillOperationArray(clinit); if (!need12Stubs) clinit.visitInsn(Opcodes.RETURN); } if (need12Stubs) { // begin of try Label begin = new Label(); // beginning of catch Label handler = new Label(); clinit.visitLabel(begin); // Initialize the methods references. if (need11Stubs) { /* * RemoteRef.class.getMethod("invoke", new Class[] { * Remote.class, Method.class, Object[].class, long.class }) */ generateClassConstant(clinit, RemoteRef.class); clinit.visitLdcInsn("invoke"); generateClassArray(clinit, new Class[] { Remote.class, Method.class, Object[].class, long.class }); clinit.visitMethodInsn(Opcodes.INVOKEVIRTUAL, Type.getInternalName(Class.class), "getMethod", Type.getMethodDescriptor(Type.getType(Method.class), new Type[] { Type.getType(String.class), Type.getType(Class[].class) })); // useNewInvoke = true clinit.visitInsn(Opcodes.ICONST_1); clinit.visitFieldInsn(Opcodes.PUTSTATIC, classInternalName, "useNewInvoke", Type.BOOLEAN_TYPE.getDescriptor()); } generateStaticMethodObjs(clinit); // jump past handler clinit.visitInsn(Opcodes.RETURN); clinit.visitLabel(handler); if (need11Stubs) { // useNewInvoke = false clinit.visitInsn(Opcodes.ICONST_0); clinit.visitFieldInsn(Opcodes.PUTSTATIC, classInternalName, "useNewInvoke", Type.BOOLEAN_TYPE.getDescriptor()); clinit.visitInsn(Opcodes.RETURN); } else { // throw NoSuchMethodError clinit.visitTypeInsn(Opcodes.NEW, typeArg(NoSuchMethodError.class)); clinit.visitInsn(Opcodes.DUP); clinit.visitLdcInsn("stub class initialization failed"); clinit.visitMethodInsn(Opcodes.INVOKESPECIAL, Type.getInternalName(NoSuchMethodError.class), "<init>", Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] { Type.getType(String.class) })); clinit.visitInsn(Opcodes.ATHROW); } clinit.visitTryCatchBlock(begin, handler, handler, Type.getInternalName(NoSuchMethodException.class)); } clinit.visitMaxs(-1, -1); generateClassForNamer(stub); // Constructors if (need11Stubs) { // no arg public constructor MethodVisitor code = stub.visitMethod(Opcodes.ACC_PUBLIC, "<init>", Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] {}), null, null); code.visitVarInsn(Opcodes.ALOAD, 0); code.visitMethodInsn(Opcodes.INVOKESPECIAL, superInternalName, "<init>", Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] {})); code.visitInsn(Opcodes.RETURN); code.visitMaxs(-1, -1); } // public RemoteRef constructor MethodVisitor constructor = stub.visitMethod(Opcodes.ACC_PUBLIC, "<init>", Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] { Type.getType(RemoteRef.class) }), null, null); constructor.visitVarInsn(Opcodes.ALOAD, 0); constructor.visitVarInsn(Opcodes.ALOAD, 1); constructor.visitMethodInsn(Opcodes.INVOKESPECIAL, superInternalName, "<init>", Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] { Type.getType(RemoteRef.class) })); constructor.visitInsn(Opcodes.RETURN); constructor.visitMaxs(-1, -1); // Method implementations for (int i = 0; i < remotemethods.length; i++) { Method m = remotemethods[i].meth; Class[] sig = m.getParameterTypes(); Class returntype = m.getReturnType(); Class[] except = sortExceptions((Class[]) remotemethods[i].exceptions.toArray(new Class[0])); MethodVisitor code = stub.visitMethod(Opcodes.ACC_PUBLIC, m.getName(), Type.getMethodDescriptor(Type.getType(returntype), typeArray(sig)), null, internalNameArray(typeArray(except))); final Variables var = new Variables(); // this and parameters are the declared vars var.declare("this"); for (int j = 0; j < sig.length; j++) var.declare(param(m, j), size(sig[j])); Label methodTryBegin = new Label(); code.visitLabel(methodTryBegin); if (need12Stubs) { Label oldInvoke = new Label(); if (need11Stubs) { // if not useNewInvoke jump to old invoke code.visitFieldInsn(Opcodes.GETSTATIC, classInternalName, "useNewInvoke", Type.getDescriptor(boolean.class)); code.visitJumpInsn(Opcodes.IFEQ, oldInvoke); } // this.ref code.visitVarInsn(Opcodes.ALOAD, var.get("this")); code.visitFieldInsn(Opcodes.GETFIELD, Type.getInternalName(RemoteObject.class), "ref", Type.getDescriptor(RemoteRef.class)); // "this" is first arg to invoke code.visitVarInsn(Opcodes.ALOAD, var.get("this")); // method object is second arg to invoke String methName = "$method_" + m.getName() + "_" + i; code.visitFieldInsn(Opcodes.GETSTATIC, classInternalName, methName, Type.getDescriptor(Method.class)); // args to remote method are third arg to invoke if (sig.length == 0) code.visitInsn(Opcodes.ACONST_NULL); else { // create arg Object[] (with boxed primitives) and push it code.visitLdcInsn(new Integer(sig.length)); code.visitTypeInsn(Opcodes.ANEWARRAY, typeArg(Object.class)); var.allocate("argArray"); code.visitVarInsn(Opcodes.ASTORE, var.get("argArray")); for (int j = 0; j < sig.length; j++) { int size = size(sig[j]); int insn = loadOpcode(sig[j]); Class box = sig[j].isPrimitive() ? box(sig[j]) : null; code.visitVarInsn(Opcodes.ALOAD, var.get("argArray")); code.visitLdcInsn(new Integer(j)); // put argument on stack if (box != null) { code.visitTypeInsn(Opcodes.NEW, typeArg(box)); code.visitInsn(Opcodes.DUP); code.visitVarInsn(insn, var.get(param(m, j))); code.visitMethodInsn(Opcodes.INVOKESPECIAL, Type.getInternalName(box), "<init>", Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] { Type.getType(sig[j]) })); } else code.visitVarInsn(insn, var.get(param(m, j))); code.visitInsn(Opcodes.AASTORE); } code.visitVarInsn(Opcodes.ALOAD, var.deallocate("argArray")); } // push remote operation opcode code.visitLdcInsn(new Long(remotemethods[i].hash)); code.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(RemoteRef.class), "invoke", Type.getMethodDescriptor(Type.getType(Object.class), new Type[] { Type.getType(Remote.class), Type.getType(Method.class), Type.getType(Object[].class), Type.LONG_TYPE })); if (!returntype.equals(Void.TYPE)) { int retcode = returnOpcode(returntype); Class boxCls = returntype.isPrimitive() ? box(returntype) : null; code.visitTypeInsn(Opcodes.CHECKCAST, typeArg(boxCls == null ? returntype : boxCls)); if (returntype.isPrimitive()) { // unbox code.visitMethodInsn(Opcodes.INVOKEVIRTUAL, Type.getType(boxCls).getInternalName(), unboxMethod(returntype), Type.getMethodDescriptor(Type.getType(returntype), new Type[] {})); } code.visitInsn(retcode); } else code.visitInsn(Opcodes.RETURN); if (need11Stubs) code.visitLabel(oldInvoke); } if (need11Stubs) { // this.ref.newCall(this, operations, index, interfaceHash) code.visitVarInsn(Opcodes.ALOAD, var.get("this")); code.visitFieldInsn(Opcodes.GETFIELD, Type.getInternalName(RemoteObject.class), "ref", Type.getDescriptor(RemoteRef.class)); // "this" is first arg to newCall code.visitVarInsn(Opcodes.ALOAD, var.get("this")); // operations is second arg to newCall code.visitFieldInsn(Opcodes.GETSTATIC, classInternalName, "operations", Type.getDescriptor(Operation[].class)); // method index is third arg code.visitLdcInsn(new Integer(i)); // interface hash is fourth arg code.visitFieldInsn(Opcodes.GETSTATIC, classInternalName, "interfaceHash", Type.LONG_TYPE.getDescriptor()); code.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(RemoteRef.class), "newCall", Type.getMethodDescriptor(Type.getType(RemoteCall.class), new Type[] { Type.getType(RemoteObject.class), Type.getType(Operation[].class), Type.INT_TYPE, Type.LONG_TYPE })); // store call object on stack and leave copy on stack var.allocate("call"); code.visitInsn(Opcodes.DUP); code.visitVarInsn(Opcodes.ASTORE, var.get("call")); Label beginArgumentTryBlock = new Label(); code.visitLabel(beginArgumentTryBlock); // ObjectOutput out = call.getOutputStream(); code.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(RemoteCall.class), "getOutputStream", Type.getMethodDescriptor(Type.getType(ObjectOutput.class), new Type[] {})); for (int j = 0; j < sig.length; j++) { // dup the ObjectOutput code.visitInsn(Opcodes.DUP); // get j'th arg to remote method code.visitVarInsn(loadOpcode(sig[j]), var.get(param(m, j))); Class argCls = sig[j].isPrimitive() ? sig[j] : Object.class; // out.writeFoo code.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(ObjectOutput.class), writeMethod(sig[j]), Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] { Type.getType(argCls) })); } // pop ObjectOutput code.visitInsn(Opcodes.POP); Label iohandler = new Label(); Label endArgumentTryBlock = new Label(); code.visitJumpInsn(Opcodes.GOTO, endArgumentTryBlock); code.visitLabel(iohandler); // throw new MarshalException(msg, ioexception); code.visitVarInsn(Opcodes.ASTORE, var.allocate("exception")); code.visitTypeInsn(Opcodes.NEW, typeArg(MarshalException.class)); code.visitInsn(Opcodes.DUP); code.visitLdcInsn("error marshalling arguments"); code.visitVarInsn(Opcodes.ALOAD, var.deallocate("exception")); code.visitMethodInsn(Opcodes.INVOKESPECIAL, Type.getInternalName(MarshalException.class), "<init>", Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] { Type.getType(String.class), Type.getType(Exception.class) })); code.visitInsn(Opcodes.ATHROW); code.visitLabel(endArgumentTryBlock); code.visitTryCatchBlock(beginArgumentTryBlock, iohandler, iohandler, Type.getInternalName(IOException.class)); // this.ref.invoke(call) code.visitVarInsn(Opcodes.ALOAD, var.get("this")); code.visitFieldInsn(Opcodes.GETFIELD, Type.getInternalName(RemoteObject.class), "ref", Type.getDescriptor(RemoteRef.class)); code.visitVarInsn(Opcodes.ALOAD, var.get("call")); code.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(RemoteRef.class), "invoke", Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] { Type.getType(RemoteCall.class) })); // handle return value boolean needcastcheck = false; Label beginReturnTryCatch = new Label(); code.visitLabel(beginReturnTryCatch); int returncode = returnOpcode(returntype); if (!returntype.equals(Void.TYPE)) { // call.getInputStream() code.visitVarInsn(Opcodes.ALOAD, var.get("call")); code.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(RemoteCall.class), "getInputStream", Type.getMethodDescriptor(Type.getType(ObjectInput.class), new Type[] {})); Class readCls = returntype.isPrimitive() ? returntype : Object.class; code.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(ObjectInput.class), readMethod(returntype), Type.getMethodDescriptor(Type.getType(readCls), new Type[] {})); boolean castresult = false; if (!returntype.isPrimitive()) { if (!returntype.equals(Object.class)) castresult = true; else needcastcheck = true; } if (castresult) code.visitTypeInsn(Opcodes.CHECKCAST, typeArg(returntype)); // leave result on stack for return } // this.ref.done(call) code.visitVarInsn(Opcodes.ALOAD, var.get("this")); code.visitFieldInsn(Opcodes.GETFIELD, Type.getInternalName(RemoteObject.class), "ref", Type.getDescriptor(RemoteRef.class)); code.visitVarInsn(Opcodes.ALOAD, var.deallocate("call")); code.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(RemoteRef.class), "done", Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] { Type.getType(RemoteCall.class) })); // return; or return result; code.visitInsn(returncode); // exception handler Label handler = new Label(); code.visitLabel(handler); code.visitVarInsn(Opcodes.ASTORE, var.allocate("exception")); // throw new UnmarshalException(msg, e) code.visitTypeInsn(Opcodes.NEW, typeArg(UnmarshalException.class)); code.visitInsn(Opcodes.DUP); code.visitLdcInsn("error unmarshalling return"); code.visitVarInsn(Opcodes.ALOAD, var.deallocate("exception")); code.visitMethodInsn(Opcodes.INVOKESPECIAL, Type.getInternalName(UnmarshalException.class), "<init>", Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] { Type.getType(String.class), Type.getType(Exception.class) })); code.visitInsn(Opcodes.ATHROW); Label endReturnTryCatch = new Label(); // catch IOException code.visitTryCatchBlock(beginReturnTryCatch, handler, handler, Type.getInternalName(IOException.class)); if (needcastcheck) { // catch ClassNotFoundException code.visitTryCatchBlock(beginReturnTryCatch, handler, handler, Type.getInternalName(ClassNotFoundException.class)); } } Label rethrowHandler = new Label(); code.visitLabel(rethrowHandler); // rethrow declared exceptions code.visitInsn(Opcodes.ATHROW); boolean needgeneral = true; for (int j = 0; j < except.length; j++) { if (except[j] == Exception.class) needgeneral = false; } for (int j = 0; j < except.length; j++) { code.visitTryCatchBlock(methodTryBegin, rethrowHandler, rethrowHandler, Type.getInternalName(except[j])); } if (needgeneral) { // rethrow unchecked exceptions code.visitTryCatchBlock(methodTryBegin, rethrowHandler, rethrowHandler, Type.getInternalName(RuntimeException.class)); Label generalHandler = new Label(); code.visitLabel(generalHandler); String msg = "undeclared checked exception"; // throw new java.rmi.UnexpectedException(msg, e) code.visitVarInsn(Opcodes.ASTORE, var.allocate("exception")); code.visitTypeInsn(Opcodes.NEW, typeArg(UnexpectedException.class)); code.visitInsn(Opcodes.DUP); code.visitLdcInsn(msg); code.visitVarInsn(Opcodes.ALOAD, var.deallocate("exception")); code.visitMethodInsn(Opcodes.INVOKESPECIAL, Type.getInternalName(UnexpectedException.class), "<init>", Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] { Type.getType(String.class), Type.getType(Exception.class) })); code.visitInsn(Opcodes.ATHROW); code.visitTryCatchBlock(methodTryBegin, rethrowHandler, generalHandler, Type.getInternalName(Exception.class)); } code.visitMaxs(-1, -1); } stub.visitEnd(); byte[] classData = stub.toByteArray(); if (!noWrite) { if (file.exists()) file.delete(); if (file.getParentFile() != null) file.getParentFile().mkdirs(); FileOutputStream fos = new FileOutputStream(file); fos.write(classData); fos.flush(); fos.close(); } }
From source file:gnu.classpath.tools.rmic.ClassRmicCompiler.java
License:Open Source License
private void generateSkel() throws IOException { skelname = fullclassname + "_Skel"; String skelclassname = classname + "_Skel"; File file = new File(destination == null ? "" : destination + File.separator + skelname.replace('.', File.separatorChar) + ".class"); if (verbose)//from w w w. j a va2 s . com System.out.println("[Generating class " + skelname + "]"); final ClassWriter skel = new ClassWriter(true); classInternalName = skelname.replace('.', '/'); skel.visit(Opcodes.V1_1, Opcodes.ACC_PUBLIC + Opcodes.ACC_FINAL, classInternalName, Type.getInternalName(Object.class), null, new String[] { Type.getType(Skeleton.class).getInternalName() }); skel.visitField(Opcodes.ACC_PRIVATE + Opcodes.ACC_STATIC + Opcodes.ACC_FINAL, "interfaceHash", Type.LONG_TYPE.getDescriptor(), null, new Long(RMIHashes.getInterfaceHash(clazz))); skel.visitField(Opcodes.ACC_PRIVATE + Opcodes.ACC_STATIC + Opcodes.ACC_FINAL, "operations", Type.getDescriptor(Operation[].class), null, null); MethodVisitor clinit = skel.visitMethod(Opcodes.ACC_STATIC, "<clinit>", Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] {}), null, null); fillOperationArray(clinit); clinit.visitInsn(Opcodes.RETURN); clinit.visitMaxs(-1, -1); // no arg public constructor MethodVisitor init = skel.visitMethod(Opcodes.ACC_PUBLIC, "<init>", Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] {}), null, null); init.visitVarInsn(Opcodes.ALOAD, 0); init.visitMethodInsn(Opcodes.INVOKESPECIAL, Type.getInternalName(Object.class), "<init>", Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] {})); init.visitInsn(Opcodes.RETURN); init.visitMaxs(-1, -1); /* * public Operation[] getOperations() * returns a clone of the operations array */ MethodVisitor getOp = skel.visitMethod(Opcodes.ACC_PUBLIC, "getOperations", Type.getMethodDescriptor(Type.getType(Operation[].class), new Type[] {}), null, null); getOp.visitFieldInsn(Opcodes.GETSTATIC, classInternalName, "operations", Type.getDescriptor(Operation[].class)); getOp.visitMethodInsn(Opcodes.INVOKEVIRTUAL, Type.getInternalName(Object.class), "clone", Type.getMethodDescriptor(Type.getType(Object.class), new Type[] {})); getOp.visitTypeInsn(Opcodes.CHECKCAST, typeArg(Operation[].class)); getOp.visitInsn(Opcodes.ARETURN); getOp.visitMaxs(-1, -1); // public void dispatch(Remote, RemoteCall, int opnum, long hash) MethodVisitor dispatch = skel.visitMethod(Opcodes.ACC_PUBLIC, "dispatch", Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] { Type.getType(Remote.class), Type.getType(RemoteCall.class), Type.INT_TYPE, Type.LONG_TYPE }), null, new String[] { Type.getInternalName(Exception.class) }); Variables var = new Variables(); var.declare("this"); var.declare("remoteobj"); var.declare("remotecall"); var.declare("opnum"); var.declareWide("hash"); /* * if opnum >= 0 * XXX it is unclear why there is handling of negative opnums */ dispatch.visitVarInsn(Opcodes.ILOAD, var.get("opnum")); Label nonNegativeOpnum = new Label(); Label opnumSet = new Label(); dispatch.visitJumpInsn(Opcodes.IFGE, nonNegativeOpnum); for (int i = 0; i < remotemethods.length; i++) { // assign opnum if hash matches supplied hash dispatch.visitVarInsn(Opcodes.LLOAD, var.get("hash")); dispatch.visitLdcInsn(new Long(remotemethods[i].hash)); Label notIt = new Label(); dispatch.visitInsn(Opcodes.LCMP); dispatch.visitJumpInsn(Opcodes.IFNE, notIt); // opnum = <opnum> dispatch.visitLdcInsn(new Integer(i)); dispatch.visitVarInsn(Opcodes.ISTORE, var.get("opnum")); dispatch.visitJumpInsn(Opcodes.GOTO, opnumSet); dispatch.visitLabel(notIt); } // throw new SkeletonMismatchException Label mismatch = new Label(); dispatch.visitJumpInsn(Opcodes.GOTO, mismatch); dispatch.visitLabel(nonNegativeOpnum); // if opnum is already set, check that the hash matches the interface dispatch.visitVarInsn(Opcodes.LLOAD, var.get("hash")); dispatch.visitFieldInsn(Opcodes.GETSTATIC, classInternalName, "interfaceHash", Type.LONG_TYPE.getDescriptor()); dispatch.visitInsn(Opcodes.LCMP); dispatch.visitJumpInsn(Opcodes.IFEQ, opnumSet); dispatch.visitLabel(mismatch); dispatch.visitTypeInsn(Opcodes.NEW, typeArg(SkeletonMismatchException.class)); dispatch.visitInsn(Opcodes.DUP); dispatch.visitLdcInsn("interface hash mismatch"); dispatch.visitMethodInsn(Opcodes.INVOKESPECIAL, Type.getInternalName(SkeletonMismatchException.class), "<init>", Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] { Type.getType(String.class) })); dispatch.visitInsn(Opcodes.ATHROW); // opnum has been set dispatch.visitLabel(opnumSet); dispatch.visitVarInsn(Opcodes.ALOAD, var.get("remoteobj")); dispatch.visitTypeInsn(Opcodes.CHECKCAST, typeArg(clazz)); dispatch.visitVarInsn(Opcodes.ASTORE, var.get("remoteobj")); Label deflt = new Label(); Label[] methLabels = new Label[remotemethods.length]; for (int i = 0; i < methLabels.length; i++) methLabels[i] = new Label(); // switch on opnum dispatch.visitVarInsn(Opcodes.ILOAD, var.get("opnum")); dispatch.visitTableSwitchInsn(0, remotemethods.length - 1, deflt, methLabels); // Method dispatch for (int i = 0; i < remotemethods.length; i++) { dispatch.visitLabel(methLabels[i]); Method m = remotemethods[i].meth; generateMethodSkel(dispatch, m, var); } dispatch.visitLabel(deflt); dispatch.visitTypeInsn(Opcodes.NEW, typeArg(UnmarshalException.class)); dispatch.visitInsn(Opcodes.DUP); dispatch.visitLdcInsn("invalid method number"); dispatch.visitMethodInsn(Opcodes.INVOKESPECIAL, Type.getInternalName(UnmarshalException.class), "<init>", Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] { Type.getType(String.class) })); dispatch.visitInsn(Opcodes.ATHROW); dispatch.visitMaxs(-1, -1); skel.visitEnd(); byte[] classData = skel.toByteArray(); if (!noWrite) { if (file.exists()) file.delete(); if (file.getParentFile() != null) file.getParentFile().mkdirs(); FileOutputStream fos = new FileOutputStream(file); fos.write(classData); fos.flush(); fos.close(); } }
From source file:gnu.classpath.tools.rmic.ClassRmicCompiler.java
License:Open Source License
private void generateMethodSkel(MethodVisitor cv, Method m, Variables var) { Class[] sig = m.getParameterTypes(); Label readArgs = new Label(); cv.visitLabel(readArgs);//from ww w.ja va 2 s . c o m boolean needcastcheck = false; // ObjectInput in = call.getInputStream(); cv.visitVarInsn(Opcodes.ALOAD, var.get("remotecall")); cv.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(RemoteCall.class), "getInputStream", Type.getMethodDescriptor(Type.getType(ObjectInput.class), new Type[] {})); cv.visitVarInsn(Opcodes.ASTORE, var.allocate("objectinput")); for (int i = 0; i < sig.length; i++) { // dup input stream cv.visitVarInsn(Opcodes.ALOAD, var.get("objectinput")); Class readCls = sig[i].isPrimitive() ? sig[i] : Object.class; // in.readFoo() cv.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(ObjectInput.class), readMethod(sig[i]), Type.getMethodDescriptor(Type.getType(readCls), new Type[] {})); if (!sig[i].isPrimitive() && !sig[i].equals(Object.class)) { needcastcheck = true; cv.visitTypeInsn(Opcodes.CHECKCAST, typeArg(sig[i])); } // store arg in variable cv.visitVarInsn(storeOpcode(sig[i]), var.allocate(param(m, i), size(sig[i]))); } var.deallocate("objectinput"); Label doCall = new Label(); Label closeInput = new Label(); cv.visitJumpInsn(Opcodes.JSR, closeInput); cv.visitJumpInsn(Opcodes.GOTO, doCall); // throw new UnmarshalException Label handler = new Label(); cv.visitLabel(handler); cv.visitVarInsn(Opcodes.ASTORE, var.allocate("exception")); cv.visitTypeInsn(Opcodes.NEW, typeArg(UnmarshalException.class)); cv.visitInsn(Opcodes.DUP); cv.visitLdcInsn("error unmarshalling arguments"); cv.visitVarInsn(Opcodes.ALOAD, var.deallocate("exception")); cv.visitMethodInsn(Opcodes.INVOKESPECIAL, Type.getInternalName(UnmarshalException.class), "<init>", Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] { Type.getType(String.class), Type.getType(Exception.class) })); cv.visitVarInsn(Opcodes.ASTORE, var.allocate("toThrow")); cv.visitJumpInsn(Opcodes.JSR, closeInput); cv.visitVarInsn(Opcodes.ALOAD, var.get("toThrow")); cv.visitInsn(Opcodes.ATHROW); cv.visitTryCatchBlock(readArgs, handler, handler, Type.getInternalName(IOException.class)); if (needcastcheck) { cv.visitTryCatchBlock(readArgs, handler, handler, Type.getInternalName(ClassCastException.class)); } // finally block cv.visitLabel(closeInput); cv.visitVarInsn(Opcodes.ASTORE, var.allocate("retAddress")); cv.visitVarInsn(Opcodes.ALOAD, var.get("remotecall")); cv.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(RemoteCall.class), "releaseInputStream", Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] {})); cv.visitVarInsn(Opcodes.RET, var.deallocate("retAddress")); var.deallocate("toThrow"); // do the call using args stored as variables cv.visitLabel(doCall); cv.visitVarInsn(Opcodes.ALOAD, var.get("remoteobj")); for (int i = 0; i < sig.length; i++) cv.visitVarInsn(loadOpcode(sig[i]), var.deallocate(param(m, i))); cv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, Type.getInternalName(clazz), m.getName(), Type.getMethodDescriptor(m)); Class returntype = m.getReturnType(); if (!returntype.equals(Void.TYPE)) { cv.visitVarInsn(storeOpcode(returntype), var.allocate("result", size(returntype))); } // write result to result stream Label writeResult = new Label(); cv.visitLabel(writeResult); cv.visitVarInsn(Opcodes.ALOAD, var.get("remotecall")); cv.visitInsn(Opcodes.ICONST_1); cv.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(RemoteCall.class), "getResultStream", Type.getMethodDescriptor(Type.getType(ObjectOutput.class), new Type[] { Type.BOOLEAN_TYPE })); if (!returntype.equals(Void.TYPE)) { // out.writeFoo(result) cv.visitVarInsn(loadOpcode(returntype), var.deallocate("result")); Class writeCls = returntype.isPrimitive() ? returntype : Object.class; cv.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(ObjectOutput.class), writeMethod(returntype), Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] { Type.getType(writeCls) })); } cv.visitInsn(Opcodes.RETURN); // throw new MarshalException Label marshalHandler = new Label(); cv.visitLabel(marshalHandler); cv.visitVarInsn(Opcodes.ASTORE, var.allocate("exception")); cv.visitTypeInsn(Opcodes.NEW, typeArg(MarshalException.class)); cv.visitInsn(Opcodes.DUP); cv.visitLdcInsn("error marshalling return"); cv.visitVarInsn(Opcodes.ALOAD, var.deallocate("exception")); cv.visitMethodInsn(Opcodes.INVOKESPECIAL, Type.getInternalName(MarshalException.class), "<init>", Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] { Type.getType(String.class), Type.getType(Exception.class) })); cv.visitInsn(Opcodes.ATHROW); cv.visitTryCatchBlock(writeResult, marshalHandler, marshalHandler, Type.getInternalName(IOException.class)); }