List of usage examples for org.objectweb.asm Opcodes IFEQ
int IFEQ
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From source file:edu.illinois.nondex.instr.WeakHashMapShufflingAdder.java
License:Open Source License
@Override public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) { if ("hasNext".equals(name)) { return super.visitMethod(access, "originalHasNext", desc, signature, exceptions); }//from w w w. j a va 2s. c o m if ("nextEntry".equals(name)) { return super.visitMethod(access, "originalNextEntry", desc, signature, exceptions); } if ("<init>".equals(name)) { return new MethodVisitor(Opcodes.ASM5, super.visitMethod(access, name, desc, signature, exceptions)) { @Override public void visitInsn(int opcode) { if (opcode == Opcodes.RETURN) { super.visitVarInsn(Opcodes.ALOAD, 0); super.visitVarInsn(Opcodes.ALOAD, 1); super.visitFieldInsn(Opcodes.PUTFIELD, "java/util/WeakHashMap$HashIterator", "this$0", "Ljava/util/WeakHashMap;"); super.visitVarInsn(Opcodes.ALOAD, 0); super.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false); super.visitVarInsn(Opcodes.ALOAD, 0); super.visitInsn(Opcodes.ACONST_NULL); super.visitFieldInsn(Opcodes.PUTFIELD, "java/util/WeakHashMap$HashIterator", "entry", "Ljava/util/WeakHashMap$Entry;"); super.visitVarInsn(Opcodes.ALOAD, 0); super.visitInsn(Opcodes.ACONST_NULL); super.visitFieldInsn(Opcodes.PUTFIELD, "java/util/WeakHashMap$HashIterator", "lastReturned", "Ljava/util/WeakHashMap$Entry;"); super.visitVarInsn(Opcodes.ALOAD, 0); super.visitVarInsn(Opcodes.ALOAD, 0); super.visitFieldInsn(Opcodes.GETFIELD, "java/util/WeakHashMap$HashIterator", "this$0", "Ljava/util/WeakHashMap;"); super.visitFieldInsn(Opcodes.GETFIELD, "java/util/WeakHashMap", "modCount", "I"); super.visitFieldInsn(Opcodes.PUTFIELD, "java/util/WeakHashMap$HashIterator", "expectedModCount", "I"); super.visitVarInsn(Opcodes.ALOAD, 0); super.visitInsn(Opcodes.ACONST_NULL); super.visitFieldInsn(Opcodes.PUTFIELD, "java/util/WeakHashMap$HashIterator", "nextKey", "Ljava/lang/Object;"); super.visitVarInsn(Opcodes.ALOAD, 0); super.visitInsn(Opcodes.ACONST_NULL); super.visitFieldInsn(Opcodes.PUTFIELD, "java/util/WeakHashMap$HashIterator", "currentKey", "Ljava/lang/Object;"); super.visitVarInsn(Opcodes.ALOAD, 0); super.visitInsn(Opcodes.ACONST_NULL); super.visitFieldInsn(Opcodes.PUTFIELD, "java/util/WeakHashMap$HashIterator", "iter", "Ljava/util/Iterator;"); super.visitVarInsn(Opcodes.ALOAD, 0); super.visitVarInsn(Opcodes.ALOAD, 1); super.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/util/WeakHashMap", "isEmpty", "()Z", false); Label l0 = new Label(); super.visitJumpInsn(Opcodes.IFEQ, l0); super.visitInsn(Opcodes.ICONST_0); Label l1 = new Label(); super.visitJumpInsn(Opcodes.GOTO, l1); super.visitLabel(l0); super.visitFrame(Opcodes.F_FULL, 2, new Object[] { "java/util/WeakHashMap$HashIterator", "java/util/WeakHashMap" }, 1, new Object[] { "java/util/WeakHashMap$HashIterator" }); super.visitVarInsn(Opcodes.ALOAD, 1); super.visitFieldInsn(Opcodes.GETFIELD, "java/util/WeakHashMap", "table", "[Ljava/util/WeakHashMap$Entry;"); super.visitInsn(Opcodes.ARRAYLENGTH); super.visitLabel(l1); super.visitFrame(Opcodes.F_FULL, 2, new Object[] { "java/util/WeakHashMap$HashIterator", "java/util/WeakHashMap" }, 2, new Object[] { "java/util/WeakHashMap$HashIterator", Opcodes.INTEGER }); super.visitFieldInsn(Opcodes.PUTFIELD, "java/util/WeakHashMap$HashIterator", "index", "I"); super.visitTypeInsn(Opcodes.NEW, "java/util/ArrayList"); super.visitInsn(Opcodes.DUP); super.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/util/ArrayList", "<init>", "()V", false); super.visitVarInsn(Opcodes.ASTORE, 2); Label l2 = new Label(); super.visitLabel(l2); super.visitFrame(Opcodes.F_APPEND, 1, new Object[] { "java/util/List" }, 0, null); super.visitVarInsn(Opcodes.ALOAD, 0); super.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/util/WeakHashMap$HashIterator", "originalHasNext", "()Z", false); Label l3 = new Label(); super.visitJumpInsn(Opcodes.IFEQ, l3); super.visitVarInsn(Opcodes.ALOAD, 2); super.visitVarInsn(Opcodes.ALOAD, 0); super.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/util/WeakHashMap$HashIterator", "originalNextEntry", "()Ljava/util/WeakHashMap$Entry;", false); super.visitMethodInsn(Opcodes.INVOKEINTERFACE, "java/util/List", "add", "(Ljava/lang/Object;)Z", true); super.visitInsn(Opcodes.POP); super.visitJumpInsn(Opcodes.GOTO, l2); super.visitLabel(l3); super.visitFrame(Opcodes.F_SAME, 0, null, 0, null); super.visitVarInsn(Opcodes.ALOAD, 2); super.visitMethodInsn(Opcodes.INVOKESTATIC, "edu/illinois/nondex/shuffling/ControlNondeterminism", "shuffle", "(Ljava/util/List;)Ljava/util/List;", false); super.visitVarInsn(Opcodes.ASTORE, 2); super.visitVarInsn(Opcodes.ALOAD, 0); super.visitVarInsn(Opcodes.ALOAD, 2); super.visitMethodInsn(Opcodes.INVOKEINTERFACE, "java/util/List", "iterator", "()Ljava/util/Iterator;", true); super.visitFieldInsn(Opcodes.PUTFIELD, "java/util/WeakHashMap$HashIterator", "iter", "Ljava/util/Iterator;"); super.visitVarInsn(Opcodes.ALOAD, 0); super.visitInsn(Opcodes.ACONST_NULL); super.visitFieldInsn(Opcodes.PUTFIELD, "java/util/WeakHashMap$HashIterator", "lastReturned", "Ljava/util/WeakHashMap$Entry;"); } super.visitInsn(opcode); } }; } return super.visitMethod(access, name, desc, signature, exceptions); }
From source file:edu.mit.streamjit.util.bytecode.MethodResolver.java
License:Open Source License
private void interpret(JumpInsnNode insn, FrameState frame, BBInfo block) { //All JumpInsnNodes have a target. Find it. BBInfo target = blockByInsn(insn.label); assert target != null; if (insn.getOpcode() == Opcodes.GOTO) { block.block.instructions().add(new JumpInst(target.block)); return;//from www . ja va 2 s. c om } else if (insn.getOpcode() == Opcodes.JSR) throw new UnsupportedOperationException("jsr not supported; upgrade to Java 6-era class files"); //Remaining opcodes are branches. BBInfo fallthrough = blocks.get(blocks.indexOf(block) + 1); BranchInst.Sense sense = OPCODE_TO_SENSE.get(insn.getOpcode()); //The second operand may come from the stack or may be a constant 0 or null. Value right; switch (insn.getOpcode()) { case Opcodes.IFEQ: case Opcodes.IFNE: case Opcodes.IFLT: case Opcodes.IFGE: case Opcodes.IFGT: case Opcodes.IFLE: right = module.constants().getConstant(0); break; case Opcodes.IFNULL: case Opcodes.IFNONNULL: right = module.constants().getNullConstant(); break; case Opcodes.IF_ICMPEQ: case Opcodes.IF_ICMPNE: case Opcodes.IF_ICMPLT: case Opcodes.IF_ICMPGE: case Opcodes.IF_ICMPGT: case Opcodes.IF_ICMPLE: case Opcodes.IF_ACMPEQ: case Opcodes.IF_ACMPNE: right = frame.stack.pop(); break; default: throw new AssertionError("Can't happen! Branch opcode missing? " + insn.getOpcode()); } //First operand always comes from the stack. Value left = frame.stack.pop(); block.block.instructions().add(new BranchInst(left, sense, right, target.block, fallthrough.block)); }
From source file:edu.umd.cs.guitar.testcase.plugin.edg.ClassDBVisitor.java
License:Open Source License
@Override public void visitJumpInsn(int opcode, Label label) { currentMethod.setEmpty(false);//from w w w . j a v a 2 s . c o m currentMethod.setEmpty(false); switch (opcode) { case Opcodes.IFEQ: case Opcodes.IFNE: case Opcodes.IFLT: case Opcodes.IFGE: case Opcodes.IFGT: case Opcodes.IFLE: case Opcodes.IF_ICMPEQ: case Opcodes.IF_ICMPNE: case Opcodes.IF_ICMPLT: case Opcodes.IF_ICMPGE: case Opcodes.IF_ICMPGT: case Opcodes.IF_ICMPLE: case Opcodes.IF_ACMPEQ: case Opcodes.IF_ACMPNE: // case Opcodes.GOTO: // case Opcodes.JSR: case Opcodes.IFNULL: case Opcodes.IFNONNULL: // add all label reads/writes as condition reads/writes currentMethod.getConditionReads().addAll(labelReads); currentMethod.getConditionWrites().addAll(labelWrites); break; } }
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 www . jav a 2 s .c om 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_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 .j a va2s . c om*/ 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 w ww.j ava 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)/*w ww .ja v a2s . c o m*/ 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:io.syncframework.optimizer.OControllerClassVisitor.java
License:Apache License
/** * Generates _asActions() method as following: * // www . j av a 2 s .c o m * if(name.equals("upload")) * return upload(); * else if(name.equals("save")) * return save(); * else if(name.equals("main")) * return main(); * else if(name.equals("redir")) * return redir(); * else * throw new RuntimeException("no action named "+name); */ private void createActionMethod() { StringBuilder sb = new StringBuilder(); sb.append("(").append(Type.getType(String.class)).append(")").append(Type.getType(Result.class)); String desc = sb.toString(); MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PUBLIC, "_asAction", desc, null, null); Label start = new Label(); Label next = new Label(); Label variable = new Label(); boolean first = true; for (String name : reflector.getActions().keySet()) { Label l0 = null; Label l1 = new Label(); if (first) { l0 = new Label(); first = false; } else { l0 = next; next = new Label(); } mv.visitLabel(l0); if (!first) { mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null); } mv.visitVarInsn(Opcodes.ALOAD, 1); mv.visitLdcInsn(name); mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/String", "equals", "(Ljava/lang/Object;)Z", false); mv.visitJumpInsn(Opcodes.IFEQ, next); mv.visitLabel(l1); mv.visitVarInsn(Opcodes.ALOAD, 0); mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, reflector.getClazzInternalName(), name, "()" + Type.getType(Result.class), false); mv.visitInsn(Opcodes.ARETURN); } mv.visitLabel(next); mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null); mv.visitTypeInsn(Opcodes.NEW, "java/lang/NoSuchMethodException"); mv.visitInsn(Opcodes.DUP); mv.visitTypeInsn(Opcodes.NEW, "java/lang/StringBuilder"); mv.visitInsn(Opcodes.DUP); mv.visitLdcInsn("no @Action named "); mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/StringBuilder", "<init>", "(Ljava/lang/String;)V", false); mv.visitVarInsn(Opcodes.ALOAD, 1); mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(Ljava/lang/String;)Ljava/lang/StringBuilder;", false); mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/StringBuilder", "toString", "()Ljava/lang/String;", false); mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/NoSuchMethodException", "<init>", "(Ljava/lang/String;)V", false); mv.visitInsn(Opcodes.ATHROW); mv.visitLabel(variable); mv.visitLocalVariable("this", reflector.getClazzDescriptor(), null, start, next, 0); mv.visitLocalVariable("name", "Ljava/lang/String;", null, start, next, 1); mv.visitMaxs(5, 2); mv.visitEnd(); }
From source file:io.syncframework.optimizer.OControllerClassVisitor.java
License:Apache License
/** * Generates this code://www. ja va2 s. c o m * * public boolean _asActionIsDefined(String name) { * if(_asActions.containsKey(name)) * return true; * return false; * } */ public void createActionIsDefinedMethod() { MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PUBLIC, "_asActionIsDefined", "(Ljava/lang/String;)Z", null, null); Label l0 = new Label(); Label l1 = new Label(); Label l2 = new Label(); Label l3 = new Label(); mv.visitLabel(l0); mv.visitFieldInsn(Opcodes.GETSTATIC, reflector.getClazzInternalName(), "_asActions", "Ljava/util/Map;"); mv.visitVarInsn(Opcodes.ALOAD, 1); mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, "java/util/Map", "containsKey", "(Ljava/lang/Object;)Z", true); mv.visitJumpInsn(Opcodes.IFEQ, l1); mv.visitLabel(l2); mv.visitInsn(Opcodes.ICONST_1); mv.visitInsn(Opcodes.IRETURN); mv.visitLabel(l1); mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null); mv.visitInsn(Opcodes.ICONST_0); mv.visitInsn(Opcodes.IRETURN); mv.visitLabel(l3); mv.visitLocalVariable("this", reflector.getClazzDescriptor(), null, l0, l3, 0); mv.visitLocalVariable("name", "Ljava/lang/String;", null, l0, l3, 1); mv.visitMaxs(2, 2); mv.visitEnd(); }
From source file:io.syncframework.optimizer.OControllerClassVisitor.java
License:Apache License
/** * Generates the _asParameter() getter as * /*from w w w . j av a 2 s. c o m*/ * public Object _asParameter(String name) { * if(name.equals("name")) * return getName(); * if(name.equals("date")) * return getDate(); * ... * return null; * } */ private void createParametersGetterMethod() { MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PUBLIC, "_asParameter", "(Ljava/lang/String;)Ljava/lang/Object;", null, null); Label start = new Label(); Label next = new Label(); Label variable = new Label(); boolean first = true; for (String name : reflector.getParameters().keySet()) { Label l0 = null; Label l1 = new Label(); if (first) { l0 = new Label(); first = false; } else { l0 = next; next = new Label(); } mv.visitLabel(l0); if (!first) mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null); mv.visitVarInsn(Opcodes.ALOAD, 1); mv.visitLdcInsn(name); mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/String", "equals", "(Ljava/lang/Object;)Z", false); mv.visitJumpInsn(Opcodes.IFEQ, next); String methodGetterName = reflector.getGetters().get(name).getName(); String methodGetterDesc = "()" + Type.getDescriptor(reflector.getParameters().get(name)); mv.visitLabel(l1); mv.visitVarInsn(Opcodes.ALOAD, 0); mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, reflector.getClazzInternalName(), methodGetterName, methodGetterDesc, false); mv.visitInsn(Opcodes.ARETURN); } mv.visitLabel(next); mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null); mv.visitInsn(Opcodes.ACONST_NULL); mv.visitInsn(Opcodes.ARETURN); mv.visitLabel(variable); mv.visitLocalVariable("this", reflector.getClazzDescriptor(), null, start, variable, 0); mv.visitLocalVariable("name", "Ljava/lang/String;", null, start, variable, 1); mv.visitMaxs(2, 2); mv.visitEnd(); }