List of usage examples for org.objectweb.asm MethodVisitor visitIntInsn
public void visitIntInsn(final int opcode, final int operand)
From source file:org.diorite.inject.impl.utils.AsmUtils.java
License:Open Source License
public static void storeInt(MethodVisitor mv, int i) { switch (i) {/* w w w . j ava 2s . c o m*/ case 0: mv.visitInsn(ICONST_0); break; case 1: mv.visitInsn(ICONST_1); break; case 2: mv.visitInsn(ICONST_2); break; case 3: mv.visitInsn(ICONST_3); break; case 4: mv.visitInsn(ICONST_4); break; default: mv.visitIntInsn(BIPUSH, i); break; } }
From source file:org.eclipse.m2m.atl.emftvm.jit.CodeBlockJIT.java
License:Open Source License
/** * Generates an optimised instruction for pushing a constant integer <code>value</code> * onto the stack.//from w w w . ja va 2 s. c om * @param value the constant integer value to push */ static void generatePushInt(final MethodVisitor mv, final int value) { if (value >= -1 && value <= 5) { switch (value) { case -1: mv.visitInsn(ICONST_M1); break; case 0: mv.visitInsn(ICONST_0); break; case 1: mv.visitInsn(ICONST_1); break; case 2: mv.visitInsn(ICONST_2); break; case 3: mv.visitInsn(ICONST_3); break; case 4: mv.visitInsn(ICONST_4); break; default: mv.visitInsn(ICONST_5); assert value == 5; break; } } else if (value < Byte.MAX_VALUE && value > Byte.MIN_VALUE) { mv.visitIntInsn(BIPUSH, value); } else if (value < Short.MAX_VALUE && value > Short.MIN_VALUE) { mv.visitIntInsn(SIPUSH, value); } else { mv.visitLdcInsn(value); } }
From source file:org.eclipse.objectteams.otredyn.bytecode.asm.AddImplicitActivationAdapter.java
License:Open Source License
@Override public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) { if (isCandidateForImplicitActivation(name, desc, access)) { final MethodVisitor methodVisitor = cv.visitMethod(access, name, desc, null, null); final String enclTeamDesc = clazz.isRole() ? 'L' + clazz.getEnclosingClass().getName().replace('.', '/') + ';' : null;//from w w w . j av a 2 s . c o m final int nesting = clazz.nestingDepth() - 1; return new AdviceAdapter(this.api, methodVisitor, access, name, desc) { @Override protected void onMethodEnter() { if (clazz.isTeam()) { methodVisitor.visitIntInsn(Opcodes.ALOAD, 0); methodVisitor.visitMethodInsn(INVOKEINTERFACE, TARGET_CLASS_NAME, IMPLICIT_ACTIVATE_METHOD_NAME, METHOD_DESC, true); } if (clazz.isRole()) { // TODO(SH): respect nesting depth (this$n) methodVisitor.visitIntInsn(Opcodes.ALOAD, 0); methodVisitor.visitFieldInsn(Opcodes.GETFIELD, clazz.getName().replace('.', '/'), "this$" + nesting, enclTeamDesc); methodVisitor.visitMethodInsn(INVOKEINTERFACE, TARGET_CLASS_NAME, IMPLICIT_ACTIVATE_METHOD_NAME, METHOD_DESC, true); } } @Override protected void onMethodExit(int opcode) { if (clazz.isTeam()) { methodVisitor.visitIntInsn(Opcodes.ALOAD, 0); methodVisitor.visitMethodInsn(INVOKEINTERFACE, TARGET_CLASS_NAME, IMPLICIT_DEACTIVATE_METHOD_NAME, METHOD_DESC, true); } if (clazz.isRole()) { // TODO(SH): respect nesting depth (this$n) methodVisitor.visitIntInsn(Opcodes.ALOAD, 0); methodVisitor.visitFieldInsn(Opcodes.GETFIELD, clazz.getName().replace('.', '/'), "this$" + nesting, enclTeamDesc); methodVisitor.visitMethodInsn(INVOKEINTERFACE, TARGET_CLASS_NAME, IMPLICIT_DEACTIVATE_METHOD_NAME, METHOD_DESC, true); } } @Override public void endMethod() { if (clazz.isTeam() || clazz.isRole()) methodVisitor.visitMaxs(0, 0); } }; } return null; }
From source file:org.eclipse.objectteams.otredyn.bytecode.asm.AddThreadNotificationAdapter.java
License:Open Source License
@Override public MethodVisitor visitMethod(int access, String methodName, String desc, String signature, String[] exceptions) {//from ww w . ja va2 s.c om if (INIT.equals(methodName)) { // into each constructor ... final MethodVisitor methodVisitor = cv.visitMethod(access, methodName, desc, null, null); return new AdviceAdapter(this.api, methodVisitor, access, methodName, desc) { @Override public void invokeConstructor(Type type, Method method) { super.invokeConstructor(type, method); // ... that contains a super(..) call (rather than this(..)): if (type.getInternalName().equals(clazz.getInternalSuperClassName())) { // insert: // this._OT$creationThread = Thread.currentThread(); methodVisitor.visitIntInsn(Opcodes.ALOAD, 0); methodVisitor.visitMethodInsn(Opcodes.INVOKESTATIC, ClassNames.THREAD_SLASH, CURRENT_THREAD, CURRENT_THREAD_DESC, false); methodVisitor.visitFieldInsn(Opcodes.PUTFIELD, clazz.getInternalName(), CREATION_THREAD, THREAD_DESC); } } }; } else if (RUN.equals(methodName) && RUN_DESC.equals(desc)) { final MethodVisitor methodVisitor = cv.visitMethod(access, methodName, desc, null, null); return new AdviceAdapter(this.api, methodVisitor, access, methodName, desc) { Label start = new Label(); // start of method (scope of new local) Label end = new Label(); // end of method int isThreadStartIdx; // new local: boolean _OT$isThreadStart @Override protected void onMethodEnter() { methodVisitor.visitLabel(start); isThreadStartIdx = newLocal(Type.BOOLEAN_TYPE); methodVisitor.visitLocalVariable("_OT$isThreadStart", "Z", null, start, end, isThreadStartIdx); // TeamThreadManager.newThreadStarted(false, this._OT$creationThread) methodVisitor.visitInsn(Opcodes.ICONST_0); methodVisitor.visitIntInsn(Opcodes.ALOAD, 0); methodVisitor.visitFieldInsn(Opcodes.GETFIELD, clazz.getInternalName(), CREATION_THREAD, THREAD_DESC); methodVisitor.visitMethodInsn(Opcodes.INVOKESTATIC, ClassNames.TEAM_THREAD_MANAGER_SLASH, NEW_THREAD_STARTED, NEW_THREAD_STARTED_DESC, false); methodVisitor.visitIntInsn(Opcodes.ISTORE, isThreadStartIdx); // this._OT$creationThread = null; // avoid leak methodVisitor.visitIntInsn(Opcodes.ALOAD, 0); methodVisitor.visitInsn(Opcodes.ACONST_NULL); methodVisitor.visitFieldInsn(Opcodes.PUTFIELD, clazz.getInternalName(), CREATION_THREAD, THREAD_DESC); } @Override protected void onMethodExit(int opcode) { insertThreadEndedNotification(); } @Override public void endMethod() { methodVisitor.visitLabel(end); // insert another threadEnded notification as a handler for Throwable Label handler = new Label(); methodVisitor.visitLabel(handler); insertThreadEndedNotification(); methodVisitor.visitInsn(Opcodes.ATHROW); // rethrow caught exception methodVisitor.visitTryCatchBlock(start, end, handler, ClassNames.THROWABLE_SLASH); methodVisitor.visitMaxs(0, 0); } void insertThreadEndedNotification() { Label skip = new Label(); // insert: // if (_OT$isThreadStart) TeamThreadManager.threadEnded(); methodVisitor.visitIntInsn(Opcodes.ILOAD, isThreadStartIdx); methodVisitor.visitJumpInsn(Opcodes.IFEQ, skip); methodVisitor.visitMethodInsn(Opcodes.INVOKESTATIC, ClassNames.TEAM_THREAD_MANAGER_SLASH, THREAD_ENDED, THREAD_ENDED_DESC, false); methodVisitor.visitLabel(skip); } }; } return null; }
From source file:org.fabric3.implementation.bytecode.proxy.common.ProxyFactoryImpl.java
License:Open Source License
public <T, D extends ProxyDispatcher> T createProxy(URI classLoaderKey, Class<T> type, Method[] methods, Class<D> dispatcherInt, Class<? extends D> dispatcherTmpl, boolean wrapped) throws ProxyException { String className = type.getName() + "_Proxy_" + dispatcherInt.getSimpleName(); // ensure multiple dispatchers can be defined for the same interface // check if the proxy class has already been created BytecodeClassLoader generationLoader = getClassLoader(classLoaderKey); try {/* www . j a v a 2 s .c o m*/ Class<T> proxyClass = (Class<T>) generationLoader.loadClass(className); return proxyClass.newInstance(); } catch (ClassNotFoundException e) { // ignore } catch (InstantiationException e) { throw new ProxyException(e); } catch (IllegalAccessException e) { throw new ProxyException(e); } verifyTemplate(dispatcherTmpl); String classNameInternal = Type.getInternalName(type) + "_Proxy_" + dispatcherInt.getSimpleName(); String thisDescriptor = "L" + classNameInternal + ";"; String dispatcherIntName = Type.getInternalName(dispatcherInt); //Important to use class version of template class that will be copied. If class compiled with JDK 1.5 but copied //to class version 1.7 there will be errors since 1.7 enforces frame stackmaps which were not present in 1.5 int version = getClassVersion(generationLoader, dispatcherTmpl); ClassWriter cw = new ClassWriter(0); MethodVisitor mv; if (type.isInterface()) { String interfazeName = Type.getInternalName(type); cw.visit(version, ACC_PUBLIC + ACC_SUPER, classNameInternal, null, "java/lang/Object", new String[] { dispatcherIntName, interfazeName }); cw.visitSource(type.getName() + "Proxy.java", null); String baseName = Type.getInternalName(Object.class); // write the ctor writeConstructor(baseName, thisDescriptor, cw); } else { verifyBaseClass(type, methods); String baseTypeName = Type.getInternalName(type); cw.visit(version, ACC_PUBLIC + ACC_SUPER, classNameInternal, null, baseTypeName, new String[] { dispatcherIntName }); cw.visitSource(type.getName() + "Proxy.java", null); String baseName = Type.getInternalName(type); // write the ctor writeConstructor(baseName, thisDescriptor, cw); } copyTemplate(generationLoader, classNameInternal, dispatcherTmpl, cw); // write the methods int methodIndex = 0; for (Method method : methods) { //if the method is not overridable do not generate a bytecode method for it. This means any invocation of the class will directly act upon the //the base class or proxy class but since these methods should not be visible anyway it shouldn't matter. The exception could be equals/hashcode/toString/clone if (!isOverridableMethod(method)) { methodIndex++; continue; } String methodSignature = Type.getMethodDescriptor(method); String[] exceptions = new String[method.getExceptionTypes().length]; for (int i = 0; i < exceptions.length; i++) { exceptions[i] = Type.getInternalName(method.getExceptionTypes()[i]); } int visibility = Modifier.isPublic(method.getModifiers()) ? ACC_PUBLIC : Modifier.isProtected(method.getModifiers()) ? ACC_PROTECTED : 0; mv = cw.visitMethod(visibility, method.getName(), methodSignature, null, exceptions); mv.visitCode(); List<Label> exceptionLabels = new ArrayList<Label>(); Label label2 = new Label(); Label label3 = new Label(); for (String exception : exceptions) { Label endLabel = new Label(); exceptionLabels.add(endLabel); mv.visitTryCatchBlock(label2, label3, endLabel, exception); } mv.visitLabel(label2); mv.visitVarInsn(ALOAD, 0); // set the method index used to dispatch on if (methodIndex >= 0 && methodIndex <= 5) { // use an integer constant if within range mv.visitInsn(Opcodes.ICONST_0 + methodIndex); } else { mv.visitIntInsn(Opcodes.BIPUSH, methodIndex); } methodIndex++; int[] index = new int[1]; index[0] = 0; int[] stack = new int[1]; stack[0] = 1; if (method.getParameterTypes().length == 0) { // no params, load null mv.visitInsn(Opcodes.ACONST_NULL); } else { if (wrapped) { emitWrappedParameters(method, mv, index, stack); } else { emitUnWrappedParameters(method, mv, index, stack); } } mv.visitMethodInsn(INVOKEVIRTUAL, classNameInternal, "_f3_invoke", "(ILjava/lang/Object;)Ljava/lang/Object;"); // handle return values writeReturn(method, label3, mv); // implement catch blocks index[0] = 0; for (String exception : exceptions) { Label endLabel = exceptionLabels.get(index[0]); mv.visitLabel(endLabel); mv.visitFrame(Opcodes.F_SAME1, 0, null, 1, new Object[] { exception }); mv.visitVarInsn(ASTORE, wrapped ? stack[0] : 1); Label label6 = new Label(); mv.visitLabel(label6); mv.visitVarInsn(ALOAD, wrapped ? stack[0] : 1); mv.visitInsn(ATHROW); index[0]++; } Label label7 = new Label(); mv.visitLabel(label7); mv.visitMaxs(7, 5); mv.visitEnd(); } cw.visitEnd(); byte[] data = cw.toByteArray(); //ClassReader classReader = new ClassReader(data); //classReader.accept(new org.objectweb.asm.util.TraceClassVisitor(null, new org.objectweb.asm.util.ASMifier(), new java.io.PrintWriter(System.out)), 0); Class<?> proxyClass = generationLoader.defineClass(className, data); try { return (T) proxyClass.newInstance(); } catch (InstantiationException e) { throw new ProxyException(e); } catch (IllegalAccessException e) { throw new ProxyException(e); } }
From source file:org.fabric3.implementation.bytecode.proxy.common.ProxyFactoryImpl.java
License:Open Source License
@SuppressWarnings("unchecked") public void emitWrappedParameters(Method method, MethodVisitor mv, int[] index, int[] stack) { int numberOfParameters = method.getParameterTypes().length; // create the Object[] used to pass the parameters to _f3_invoke and push it on the stack if (numberOfParameters >= 0 && numberOfParameters <= 5) { // use an integer constant if within range mv.visitInsn(Opcodes.ICONST_0 + numberOfParameters); } else {//from ww w.j av a 2 s.c o m mv.visitIntInsn(Opcodes.BIPUSH, numberOfParameters); } mv.visitTypeInsn(ANEWARRAY, "java/lang/Object"); mv.visitInsn(DUP); for (Class<?> param : method.getParameterTypes()) { if (Integer.TYPE.equals(param)) { mv.visitInsn(Opcodes.ICONST_0 + index[0]); mv.visitVarInsn(Opcodes.ILOAD, stack[0]); mv.visitMethodInsn(INVOKESTATIC, "java/lang/Integer", "valueOf", "(I)Ljava/lang/Integer;"); mv.visitInsn(AASTORE); if (index[0] < numberOfParameters - 1) { mv.visitInsn(DUP); } } else if (Float.TYPE.equals(param)) { mv.visitInsn(Opcodes.ICONST_0 + index[0]); mv.visitVarInsn(Opcodes.FLOAD, stack[0]); mv.visitMethodInsn(INVOKESTATIC, "java/lang/Float", "valueOf", "(F)Ljava/lang/Float;"); mv.visitInsn(AASTORE); if (index[0] < numberOfParameters - 1) { mv.visitInsn(DUP); } } else if (Boolean.TYPE.equals(param)) { mv.visitInsn(Opcodes.ICONST_0 + index[0]); mv.visitVarInsn(Opcodes.ILOAD, stack[0]); mv.visitMethodInsn(INVOKESTATIC, "java/lang/Boolean", "valueOf", "(Z)Ljava/lang/Boolean;"); mv.visitInsn(AASTORE); if (index[0] < numberOfParameters - 1) { mv.visitInsn(DUP); } } else if (Short.TYPE.equals(param)) { mv.visitInsn(Opcodes.ICONST_0 + index[0]); mv.visitVarInsn(Opcodes.ILOAD, stack[0]); mv.visitMethodInsn(INVOKESTATIC, "java/lang/Short", "valueOf", "(S)Ljava/lang/Short;"); mv.visitInsn(AASTORE); if (index[0] < numberOfParameters - 1) { mv.visitInsn(DUP); } } else if (Byte.TYPE.equals(param)) { mv.visitInsn(Opcodes.ICONST_0 + index[0]); mv.visitVarInsn(Opcodes.ILOAD, stack[0]); mv.visitMethodInsn(INVOKESTATIC, "java/lang/Byte", "valueOf", "(B)Ljava/lang/Byte;"); mv.visitInsn(AASTORE); if (index[0] < numberOfParameters - 1) { mv.visitInsn(DUP); } } else if (Double.TYPE.equals(param)) { mv.visitInsn(Opcodes.ICONST_0 + index[0]); mv.visitVarInsn(Opcodes.DLOAD, stack[0]); mv.visitMethodInsn(INVOKESTATIC, "java/lang/Double", "valueOf", "(D)Ljava/lang/Double;"); mv.visitInsn(AASTORE); if (index[0] < numberOfParameters - 1) { mv.visitInsn(DUP); } stack[0]++; // double occupies two positions } else if (Long.TYPE.equals(param)) { mv.visitInsn(Opcodes.ICONST_0 + index[0]); mv.visitVarInsn(Opcodes.LLOAD, stack[0]); mv.visitMethodInsn(INVOKESTATIC, "java/lang/Long", "valueOf", "(J)Ljava/lang/Long;"); mv.visitInsn(AASTORE); if (index[0] < numberOfParameters - 1) { mv.visitInsn(DUP); } stack[0]++; // long occupies two positions } else { // object type mv.visitInsn(Opcodes.ICONST_0 + index[0]); mv.visitVarInsn(ALOAD, stack[0]); mv.visitInsn(AASTORE); if (index[0] < numberOfParameters - 1) { mv.visitInsn(DUP); } } index[0]++; } // TODO other primitive types stack[0]++; }
From source file:org.fabric3.monitor.impl.proxy.BytecodeMonitorProxyService.java
License:Open Source License
/** * Pushes an integer onto the stack//w w w . ja v a 2 s .c o m * * @param value the value to push * @param mv the method visitor */ private void pushInteger(int value, MethodVisitor mv) { if (value == 0) { mv.visitInsn(ICONST_0); } else if (value == 1) { mv.visitInsn(ICONST_1); } else if (value == 2) { mv.visitInsn(ICONST_2); } else if (value == 3) { mv.visitInsn(ICONST_3); } else if (value == 4) { mv.visitInsn(ICONST_4); } else if (value == 5) { mv.visitInsn(ICONST_5); } else { mv.visitIntInsn(BIPUSH, value); } }
From source file:org.glowroot.agent.advicegen.AdviceGenerator.java
License:Apache License
private void addCodeForOptionalTransactionAttributes(MethodVisitor mv) { if (!config.transactionType().isEmpty() && !config.isTransaction()) { mv.visitVarInsn(ALOAD, 0);//from w ww. j a va 2 s . co m mv.visitLdcInsn(config.transactionType()); mv.visitIntInsn(BIPUSH, Priority.USER_CONFIG); mv.visitMethodInsn(INVOKEINTERFACE, "org/glowroot/agent/plugin/api/ThreadContext", "setTransactionType", "(Ljava/lang/String;I)V", true); } if (!config.transactionNameTemplate().isEmpty() && !config.isTransaction()) { mv.visitVarInsn(ALOAD, 0); mv.visitVarInsn(ALOAD, 4); // methodMetaInternalName is non-null when transactionNameTemplate is non-empty checkNotNull(methodMetaInternalName); mv.visitMethodInsn(INVOKEVIRTUAL, methodMetaInternalName, "getTransactionNameTemplate", "()Lorg/glowroot/agent/advicegen/MessageTemplate;", false); mv.visitVarInsn(ALOAD, 1); mv.visitVarInsn(ALOAD, 2); mv.visitVarInsn(ALOAD, 3); mv.visitMethodInsn(INVOKESTATIC, "org/glowroot/agent/advicegen/GenericMessageSupplier", "create", "(Lorg/glowroot/agent/advicegen/MessageTemplate;Ljava/lang/Object;" + "Ljava/lang/String;[Ljava/lang/Object;)" + "Lorg/glowroot/agent/advicegen/GenericMessageSupplier;", false); mv.visitMethodInsn(INVOKEVIRTUAL, "org/glowroot/agent/advicegen/GenericMessageSupplier", "getMessageText", "()Ljava/lang/String;", false); mv.visitIntInsn(BIPUSH, Priority.USER_CONFIG); mv.visitMethodInsn(INVOKEINTERFACE, "org/glowroot/agent/plugin/api/ThreadContext", "setTransactionName", "(Ljava/lang/String;I)V", true); } if (!config.transactionUserTemplate().isEmpty()) { mv.visitVarInsn(ALOAD, 0); mv.visitVarInsn(ALOAD, 4); // methodMetaInternalName is non-null when transactionUserTemplate is non-empty checkNotNull(methodMetaInternalName); mv.visitMethodInsn(INVOKEVIRTUAL, methodMetaInternalName, "getTransactionUserTemplate", "()Lorg/glowroot/agent/advicegen/MessageTemplate;", false); mv.visitVarInsn(ALOAD, 1); mv.visitVarInsn(ALOAD, 2); mv.visitVarInsn(ALOAD, 3); mv.visitMethodInsn(INVOKESTATIC, "org/glowroot/agent/advicegen/GenericMessageSupplier", "create", "(Lorg/glowroot/agent/advicegen/MessageTemplate;Ljava/lang/Object;" + "Ljava/lang/String;[Ljava/lang/Object;)" + "Lorg/glowroot/agent/advicegen/GenericMessageSupplier;", false); mv.visitMethodInsn(INVOKEVIRTUAL, "org/glowroot/agent/advicegen/GenericMessageSupplier", "getMessageText", "()Ljava/lang/String;", false); mv.visitIntInsn(BIPUSH, Priority.USER_CONFIG); mv.visitMethodInsn(INVOKEINTERFACE, "org/glowroot/agent/plugin/api/ThreadContext", "setTransactionUser", "(Ljava/lang/String;I)V", true); } int i = 0; for (String attrName : config.transactionAttributeTemplates().keySet()) { mv.visitVarInsn(ALOAD, 0); mv.visitLdcInsn(attrName); mv.visitVarInsn(ALOAD, 4); // methodMetaInternalName is non-null when transactionAttributeTemplates is // non-empty checkNotNull(methodMetaInternalName); mv.visitMethodInsn(INVOKEVIRTUAL, methodMetaInternalName, "getTransactionAttributeTemplate" + i++, "()Lorg/glowroot/agent/advicegen/MessageTemplate;", false); mv.visitVarInsn(ALOAD, 1); mv.visitVarInsn(ALOAD, 2); mv.visitVarInsn(ALOAD, 3); mv.visitMethodInsn(INVOKESTATIC, "org/glowroot/agent/advicegen/GenericMessageSupplier", "create", "(Lorg/glowroot/agent/advicegen/MessageTemplate;" + "Ljava/lang/Object;Ljava/lang/String;[Ljava/lang/Object;)" + "Lorg/glowroot/agent/advicegen/GenericMessageSupplier;", false); mv.visitMethodInsn(INVOKEVIRTUAL, "org/glowroot/agent/advicegen/GenericMessageSupplier", "getMessageText", "()Ljava/lang/String;", false); mv.visitMethodInsn(INVOKEINTERFACE, "org/glowroot/agent/plugin/api/ThreadContext", "addTransactionAttribute", "(Ljava/lang/String;Ljava/lang/String;)V", true); } Integer slowThresholdMillis = config.transactionSlowThresholdMillis(); if (slowThresholdMillis != null) { mv.visitVarInsn(ALOAD, 0); mv.visitLdcInsn(slowThresholdMillis.longValue()); mv.visitFieldInsn(GETSTATIC, "java/util/concurrent/TimeUnit", "MILLISECONDS", "Ljava/util/concurrent/TimeUnit;"); mv.visitIntInsn(BIPUSH, Priority.USER_CONFIG); mv.visitMethodInsn(INVOKEINTERFACE, "org/glowroot/agent/plugin/api/ThreadContext", "setTransactionSlowThreshold", "(JLjava/util/concurrent/TimeUnit;I)V", true); } }
From source file:org.glowroot.agent.weaving.GenerateHackedConstructorBytecode.java
License:Apache License
static LazyDefinedClass generateHackedConstructorBytecode() throws Exception { ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS); MethodVisitor mv; cw.visit(V1_7, ACC_PUBLIC + ACC_SUPER, "HackedConstructorBytecode", null, Test.class.getName().replace('.', '/'), new String[] {}); {//from w ww .ja v a2 s .co m mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null); mv.visitCode(); mv.visitInsn(ICONST_1); mv.visitIntInsn(NEWARRAY, T_BOOLEAN); mv.visitVarInsn(ASTORE, 1); mv.visitVarInsn(ALOAD, 0); mv.visitMethodInsn(INVOKESPECIAL, Test.class.getName().replace('.', '/'), "<init>", "()V", false); mv.visitVarInsn(ALOAD, 1); mv.visitInsn(ICONST_0); mv.visitInsn(ICONST_1); mv.visitInsn(BASTORE); mv.visitInsn(RETURN); mv.visitMaxs(0, 0); mv.visitEnd(); } cw.visitEnd(); return ImmutableLazyDefinedClass.builder().type(Type.getObjectType("HackedConstructorBytecode")) .bytes(cw.toByteArray()).build(); }
From source file:org.glowroot.agent.weaving.WeavingClassVisitor.java
License:Apache License
@RequiresNonNull({ "type", "metaHolderInternalName", "loader" })
private void generateMetaHolder() throws Exception {
ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS + ClassWriter.COMPUTE_FRAMES);
cw.visit(V1_5, ACC_PUBLIC + ACC_SUPER, metaHolderInternalName, null, "java/lang/Object", null);
Type metaHolderType = Type.getObjectType(metaHolderInternalName);
MethodVisitor mv = cw.visitMethod(ACC_STATIC, "<clinit>", "()V", null, null);
mv.visitCode();/* ww w . ja v a 2 s . c om*/
Label l0 = new Label();
Label l1 = new Label();
Label l2 = new Label();
mv.visitTryCatchBlock(l0, l1, l2, "java/lang/ClassNotFoundException");
mv.visitLabel(l0);
for (Type classMetaType : classMetaTypes) {
String classMetaInternalName = classMetaType.getInternalName();
String classMetaFieldName = "glowroot$class$meta$" + classMetaInternalName.replace('/', '$');
FieldVisitor fv = cw.visitField(ACC_PUBLIC + ACC_FINAL + ACC_STATIC, classMetaFieldName,
"L" + classMetaInternalName + ";", null, null);
fv.visitEnd();
mv.visitTypeInsn(NEW, classMetaInternalName);
mv.visitInsn(DUP);
loadType(mv, type, metaHolderType);
mv.visitMethodInsn(INVOKESPECIAL, classMetaInternalName, "<init>", "(Ljava/lang/Class;)V", false);
mv.visitFieldInsn(PUTSTATIC, metaHolderInternalName, classMetaFieldName,
"L" + classMetaInternalName + ";");
}
for (MethodMetaGroup methodMetaGroup : methodMetaGroups) {
for (Type methodMetaType : methodMetaGroup.methodMetaTypes()) {
String methodMetaInternalName = methodMetaType.getInternalName();
String methodMetaFieldName = "glowroot$method$meta$" + methodMetaGroup.uniqueNum() + '$'
+ methodMetaInternalName.replace('/', '$');
FieldVisitor fv = cw.visitField(ACC_PUBLIC + ACC_FINAL + ACC_STATIC, methodMetaFieldName,
"L" + methodMetaInternalName + ";", null, null);
fv.visitEnd();
mv.visitTypeInsn(NEW, methodMetaInternalName);
mv.visitInsn(DUP);
loadType(mv, type, metaHolderType);
mv.visitLdcInsn(methodMetaGroup.methodName());
mv.visitIntInsn(BIPUSH, methodMetaGroup.methodParameterTypes().size());
mv.visitTypeInsn(ANEWARRAY, "java/lang/Class");
for (int i = 0; i < methodMetaGroup.methodParameterTypes().size(); i++) {
mv.visitInsn(DUP);
mv.visitIntInsn(BIPUSH, i);
loadType(mv, methodMetaGroup.methodParameterTypes().get(i), metaHolderType);
mv.visitInsn(AASTORE);
}
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Class", "getDeclaredMethod",
"(Ljava/lang/String;[Ljava/lang/Class;)Ljava/lang/reflect/Method;", false);
mv.visitMethodInsn(INVOKESPECIAL, methodMetaInternalName, "<init>", "(Ljava/lang/reflect/Method;)V",
false);
mv.visitFieldInsn(PUTSTATIC, metaHolderInternalName, methodMetaFieldName,
"L" + methodMetaInternalName + ";");
}
}
// this is just try/catch ClassNotFoundException/re-throw AssertionError
mv.visitLabel(l1);
Label l3 = new Label();
mv.visitJumpInsn(GOTO, l3);
mv.visitLabel(l2);
mv.visitFrame(F_SAME1, 0, null, 1, new Object[] { "java/lang/ClassNotFoundException" });
mv.visitVarInsn(ASTORE, 0);
mv.visitTypeInsn(NEW, "java/lang/AssertionError");
mv.visitInsn(DUP);
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESPECIAL, "java/lang/AssertionError", "<init>", "(Ljava/lang/Object;)V", false);
mv.visitInsn(ATHROW);
mv.visitLabel(l3);
mv.visitFrame(F_SAME, 0, null, 0, null);
mv.visitInsn(RETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
cw.visitEnd();
byte[] bytes = cw.toByteArray();
ClassLoaders.defineClass(ClassNames.fromInternalName(metaHolderInternalName), bytes, loader);
}