List of usage examples for org.objectweb.asm Opcodes GETFIELD
int GETFIELD
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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.j a va2 s . co 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.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 . ja va2 s . co 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.impl.common.MessageConstraint.java
License:Open Source License
/** * Parse the given getHandle() call instruction and preceding instructions * into a WorkerData. This is a rather brittle pattern-matching job and * will fail on obfuscated bytecodes./*from w w w. j a va 2s .c om*/ * @param call * @return */ private static WorkerData dataFromCall(Class<?> klass, MethodInsnNode call) { //Latency is either an integer constant or a getfield on this. Field latencyField = null; int constantLatency = Integer.MIN_VALUE; AbstractInsnNode latencyInsn = call.getPrevious(); if (latencyInsn instanceof FieldInsnNode) { FieldInsnNode fieldInsn = (FieldInsnNode) latencyInsn; if (fieldInsn.getOpcode() != Opcodes.GETFIELD) throw new IllegalStreamGraphException("Unsupported getHandle() use in " + klass + ": latency field insn opcode " + fieldInsn.getOpcode()); if (!fieldInsn.desc.equals(Type.INT_TYPE.getDescriptor())) throw new IllegalStreamGraphException( "Unsupported getHandle() use in " + klass + ": latency field desc " + fieldInsn.desc); if (!fieldInsn.owner.equals(Type.getType(klass).getInternalName())) throw new IllegalStreamGraphException( "Unsupported getHandle() use in " + klass + ": latency field owner " + fieldInsn.owner); //Move latencyInsn to sync up with the other else-if branches. latencyInsn = latencyInsn.getPrevious(); //We must be loading from this. if (latencyInsn.getOpcode() != Opcodes.ALOAD) throw new IllegalStreamGraphException("Unsupported getHandle() use in " + klass + ": getfield subject opcode " + latencyInsn.getOpcode()); int varIdx = ((VarInsnNode) latencyInsn).var; if (varIdx != 0) throw new IllegalStreamGraphException( "Unsupported getHandle() use in " + klass + ": getfield not from this but from " + varIdx); //Check the field we're loading from is constant (final). //A static field is okay here since it isn't a reference parameter. try { latencyField = klass.getDeclaredField(fieldInsn.name); if (!Modifier.isFinal(latencyField.getModifiers())) throw new IllegalStreamGraphException("Unsupported getHandle() use in " + klass + ": latency field not final: " + latencyField.toGenericString()); } catch (NoSuchFieldException ex) { throw new IllegalStreamGraphException( "Unsupported getHandle() use in " + klass + ": getfield not from this but from " + varIdx); } } else if (latencyInsn instanceof LdcInsnNode) { Object constant = ((LdcInsnNode) latencyInsn).cst; if (!(constant instanceof Integer)) throw new IllegalStreamGraphException( "Unsupported getHandle() use in " + klass + ": ldc " + constant); constantLatency = ((Integer) constant); } else switch (latencyInsn.getOpcode()) { case Opcodes.ICONST_M1: constantLatency = -1; break; case Opcodes.ICONST_0: constantLatency = 0; break; case Opcodes.ICONST_1: constantLatency = 1; break; case Opcodes.ICONST_2: constantLatency = 2; break; case Opcodes.ICONST_3: constantLatency = 3; break; case Opcodes.ICONST_4: constantLatency = 4; break; case Opcodes.ICONST_5: constantLatency = 5; break; case Opcodes.BIPUSH: case Opcodes.SIPUSH: constantLatency = ((IntInsnNode) latencyInsn).operand; break; default: throw new IllegalStreamGraphException("Unsupported getHandle() use in " + klass + ": latencyInsn opcode " + latencyInsn.getOpcode()); } //Finally, we've parsed the latency parameter. //Next is an aload_0 for the sender parameter. AbstractInsnNode senderInsn = latencyInsn.getPrevious(); if (senderInsn.getOpcode() != Opcodes.ALOAD || ((VarInsnNode) senderInsn).var != 0) throw new IllegalStreamGraphException("Unsupported getHandle() use in " + klass + ": bad sender"); //Finally, a getfield of this for a final Portal instance field. AbstractInsnNode portalInsn = senderInsn.getPrevious(); if (!(portalInsn instanceof FieldInsnNode)) throw new IllegalStreamGraphException("Unsupported getHandle() use in " + klass + ": portal getfield opcode " + portalInsn.getOpcode()); FieldInsnNode fieldInsn = (FieldInsnNode) portalInsn; if (fieldInsn.getOpcode() != Opcodes.GETFIELD) throw new IllegalStreamGraphException("Unsupported getHandle() use in " + klass + ": portal field insn opcode " + fieldInsn.getOpcode()); if (!fieldInsn.desc.equals(Type.getType(Portal.class).getDescriptor())) throw new IllegalStreamGraphException( "Unsupported getHandle() use in " + klass + ": portal field desc " + fieldInsn.desc); if (!fieldInsn.owner.equals(Type.getType(klass).getInternalName())) throw new IllegalStreamGraphException( "Unsupported getHandle() use in " + klass + ": portal field owner " + fieldInsn.owner); portalInsn = portalInsn.getPrevious(); //We must be loading from this. if (portalInsn.getOpcode() != Opcodes.ALOAD) throw new IllegalStreamGraphException("Unsupported getHandle() use in " + klass + ": portal getfield subject opcode " + portalInsn.getOpcode()); int varIdx = ((VarInsnNode) portalInsn).var; if (varIdx != 0) throw new IllegalStreamGraphException("Unsupported getHandle() use in " + klass + ": portal getfield not from this but from " + varIdx); //Check the field we're loading from is constant (final) and nonstatic. Field portalField; try { portalField = klass.getDeclaredField(fieldInsn.name); if (!Modifier.isFinal(portalField.getModifiers())) throw new IllegalStreamGraphException("Unsupported getHandle() use in " + klass + ": portal field not final: " + portalField.toGenericString()); if (Modifier.isStatic(portalField.getModifiers())) throw new IllegalStreamGraphException("Unsupported getHandle() use in " + klass + ": portal field is static: " + portalField.toGenericString()); } catch (NoSuchFieldException ex) { throw new IllegalStreamGraphException("Unsupported getHandle() use in " + klass + ": portal getfield not from this but from " + varIdx); } return latencyField != null ? new WorkerData(portalField, latencyField) : new WorkerData(portalField, constantLatency); }
From source file:edu.mit.streamjit.util.bytecode.MethodResolver.java
License:Open Source License
private void interpret(FieldInsnNode insn, FrameState frame, BBInfo block) { Klass k = getKlassByInternalName(insn.owner); Field f = k.getField(insn.name); switch (insn.getOpcode()) { case Opcodes.GETSTATIC: LoadInst li = new LoadInst(f); block.block.instructions().add(li); frame.stack.push(li);/* w ww . j a v a 2 s. c o m*/ break; case Opcodes.GETFIELD: LoadInst li2 = new LoadInst(f, frame.stack.pop()); block.block.instructions().add(li2); frame.stack.push(li2); break; case Opcodes.PUTSTATIC: StoreInst si = new StoreInst(f, frame.stack.pop()); block.block.instructions().add(si); break; case Opcodes.PUTFIELD: StoreInst si2 = new StoreInst(f, frame.stack.pop(), frame.stack.pop()); block.block.instructions().add(si2); break; default: throw new UnsupportedOperationException("" + insn.getOpcode()); } }
From source file:edu.mit.streamjit.util.bytecode.MethodUnresolver.java
License:Open Source License
private void emit(LoadInst i, InsnList insns) { Value location = i.getLocation();// ww w . ja va 2 s. c om if (location instanceof LocalVariable) { load(location, insns); store(i, insns); } else { Field f = (Field) location; if (!f.isStatic()) load(i.getInstance(), insns); insns.add(new FieldInsnNode(f.isStatic() ? Opcodes.GETSTATIC : Opcodes.GETFIELD, internalName(f.getParent()), f.getName(), f.getType().getFieldType().getDescriptor())); 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 ww w . j a v a 2 s.c o 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:edu.umd.cs.findbugs.ba.XFactory.java
License:Open Source License
public static XField createReferencedXField(DismantleBytecode visitor) { int seen = visitor.getOpcode(); if (seen != Opcodes.GETFIELD && seen != Opcodes.GETSTATIC && seen != Opcodes.PUTFIELD && seen != Opcodes.PUTSTATIC) { throw new IllegalArgumentException("Not at a field reference"); }//from www .j av a 2 s . c o m return createXFieldUsingSlashedClassName(visitor.getClassConstantOperand(), visitor.getNameConstantOperand(), visitor.getSigConstantOperand(), visitor.getRefFieldIsStatic()); }
From source file:edu.umd.cs.guitar.testcase.plugin.edg.ClassDBVisitor.java
License:Open Source License
@Override public void visitFieldInsn(int opcode, String owner, String name, String desc) { currentMethod.setEmpty(false);/*w ww.ja v a 2s . com*/ Class c; Field f; switch (opcode) { case Opcodes.GETFIELD: case Opcodes.GETSTATIC: c = getClass(owner); f = getField(c, name); f.setDesc(desc); // read after write is not a real read // if (!currentMethod.hasWrite(f)){ currentMethod.addRead(f); labelReads.add(f); // } break; case Opcodes.PUTFIELD: case Opcodes.PUTSTATIC: c = getClass(owner); f = getField(c, name); f.setDesc(desc); currentMethod.addWrite(f); labelWrites.add(f); break; } }
From source file:erjang.ETuple.java
License:Apache License
private static void create_tuple_nth(int n_cells, ClassAdapter cw, String this_class_name) { MethodVisitor mv;/*from w ww.j a v a 2s . c om*/ mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "elm", "(I)" + ETERM_TYPE.getDescriptor(), null, null); mv.visitCode(); Label dflt = new Label(); Label[] labels = new Label[n_cells]; for (int i = 0; i < n_cells; i++) { labels[i] = new Label(); } mv.visitVarInsn(Opcodes.ILOAD, 1); mv.visitTableSwitchInsn(1, n_cells, dflt, labels); for (int zbase = 0; zbase < n_cells; zbase++) { mv.visitLabel(labels[zbase]); mv.visitVarInsn(Opcodes.ALOAD, 0); // load this String field = "elem" + (zbase + 1); mv.visitFieldInsn(Opcodes.GETFIELD, this_class_name, field, ETERM_TYPE.getDescriptor()); mv.visitInsn(Opcodes.ARETURN); } mv.visitLabel(dflt); mv.visitVarInsn(Opcodes.ALOAD, 0); mv.visitVarInsn(Opcodes.ILOAD, 1); mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, ETUPLE_NAME, "bad_nth", "(I)" + ETERM_TYPE.getDescriptor()); mv.visitInsn(Opcodes.ARETURN); // make compiler happy mv.visitMaxs(3, 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)// w w w.jav 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(); } }