arthas-master

core/src/main/java/com/taobao/arthas/core/advisor/ArthasMethod.java

+package com.taobao.arthas.core.advisor;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+import com.alibaba.deps.org.objectweb.asm.Type;
+import com.taobao.arthas.core.util.StringUtils;
+
+/**
+ * 
+ * 主要用于 tt 命令重放使用
+ * 
+ * @author vlinux on 15/5/24
+ * @author hengyunabc 2020-05-20
+ *
+ */
+public class ArthasMethod {
+    private final Class<?> clazz;
+    private final String methodName;
+    private final String methodDesc;
+
+    private Constructor<?> constructor;
+    private Method method;
+
+    private void initMethod() {
+        if (constructor != null || method != null) {
+            return;
+        }
+
+        try {
+            ClassLoader loader = this.clazz.getClassLoader();
+            final Type asmType = Type.getMethodType(methodDesc);
+
+            // to arg types
+            final Class<?>[] argsClasses = new Class<?>[asmType.getArgumentTypes().length];
+            for (int index = 0; index < argsClasses.length; index++) {
+                // asm class descriptor to jvm class
+                final Class<?> argumentClass;
+                final Type argumentAsmType = asmType.getArgumentTypes()[index];
+                switch (argumentAsmType.getSort()) {
+                case Type.BOOLEAN: {
+                    argumentClass = boolean.class;
+                    break;
+                }
+                case Type.CHAR: {
+                    argumentClass = char.class;
+                    break;
+                }
+                case Type.BYTE: {
+                    argumentClass = byte.class;
+                    break;
+                }
+                case Type.SHORT: {
+                    argumentClass = short.class;
+                    break;
+                }
+                case Type.INT: {
+                    argumentClass = int.class;
+                    break;
+                }
+                case Type.FLOAT: {
+                    argumentClass = float.class;
+                    break;
+                }
+                case Type.LONG: {
+                    argumentClass = long.class;
+                    break;
+                }
+                case Type.DOUBLE: {
+                    argumentClass = double.class;
+                    break;
+                }
+                case Type.ARRAY: {
+                    argumentClass = toClass(loader, argumentAsmType.getInternalName());
+                    break;
+                }
+                case Type.VOID: {
+                    argumentClass = void.class;
+                    break;
+                }
+                case Type.OBJECT:
+                case Type.METHOD:
+                default: {
+                    argumentClass = toClass(loader, argumentAsmType.getClassName());
+                    break;
+                }
+                }
+
+                argsClasses[index] = argumentClass;
+            }
+
+            if ("<init>".equals(this.methodName)) {
+                this.constructor = clazz.getDeclaredConstructor(argsClasses);
+            } else {
+                this.method = clazz.getDeclaredMethod(methodName, argsClasses);
+            }
+        } catch (Throwable e) {
+            throw new RuntimeException(e);
+        }
+
+    }
+
+    private Class<?> toClass(ClassLoader loader, String className) throws ClassNotFoundException {
+        return Class.forName(StringUtils.normalizeClassName(className), true, toClassLoader(loader));
+    }
+
+    private ClassLoader toClassLoader(ClassLoader loader) {
+        return null != loader ? loader : ArthasMethod.class.getClassLoader();
+    }
+
+    /**
+     * 获取方法名称
+     *
+     * @return 返回方法名称
+     */
+    public String getName() {
+        return this.methodName;
+    }
+
+    @Override
+    public String toString() {
+        initMethod();
+        if (constructor != null) {
+            return constructor.toString();
+        } else if (method != null) {
+            return method.toString();
+        }
+        return "ERROR_METHOD";
+    }
+
+    public boolean isAccessible() {
+        initMethod();
+        if (this.method != null) {
+            return method.isAccessible();
+        } else if (this.constructor != null) {
+            return constructor.isAccessible();
+        }
+        return false;
+    }
+
+    public void setAccessible(boolean accessFlag) {
+        initMethod();
+        if (constructor != null) {
+            constructor.setAccessible(accessFlag);
+        } else if (method != null) {
+            method.setAccessible(accessFlag);
+        }
+    }
+
+    public Object invoke(Object target, Object... args)
+            throws IllegalAccessException, InvocationTargetException, InstantiationException {
+        initMethod();
+        if (method != null) {
+            return method.invoke(target, args);
+        } else if (this.constructor != null) {
+            return constructor.newInstance(args);
+        }
+        return null;
+    }
+
+    public ArthasMethod(Class<?> clazz, String methodName, String methodDesc) {
+        this.clazz = clazz;
+        this.methodName = methodName;
+        this.methodDesc = methodDesc;
+    }
+}

core/src/main/java/com/taobao/arthas/core/advisor/Enhancer.java

+package com.taobao.arthas.core.advisor;
+
+import static com.taobao.arthas.core.util.ArthasCheckUtils.isEquals;
+import static java.lang.System.arraycopy;
+
+import java.arthas.SpyAPI;
+import java.io.File;
+import java.io.IOException;
+import java.lang.instrument.ClassFileTransformer;
+import java.lang.instrument.IllegalClassFormatException;
+import java.lang.instrument.Instrumentation;
+import java.lang.instrument.UnmodifiableClassException;
+import java.lang.reflect.Method;
+import java.security.ProtectionDomain;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.WeakHashMap;
+
+import com.alibaba.deps.org.objectweb.asm.ClassReader;
+import com.alibaba.deps.org.objectweb.asm.Opcodes;
+import com.alibaba.deps.org.objectweb.asm.Type;
+import com.alibaba.deps.org.objectweb.asm.tree.AbstractInsnNode;
+import com.alibaba.deps.org.objectweb.asm.tree.ClassNode;
+import com.alibaba.deps.org.objectweb.asm.tree.MethodInsnNode;
+import com.alibaba.deps.org.objectweb.asm.tree.MethodNode;
+import com.alibaba.arthas.deps.org.slf4j.Logger;
+import com.alibaba.arthas.deps.org.slf4j.LoggerFactory;
+import com.alibaba.bytekit.asm.MethodProcessor;
+import com.alibaba.bytekit.asm.interceptor.InterceptorProcessor;
+import com.alibaba.bytekit.asm.interceptor.parser.DefaultInterceptorClassParser;
+import com.alibaba.bytekit.asm.location.Location;
+import com.alibaba.bytekit.asm.location.LocationType;
+import com.alibaba.bytekit.asm.location.MethodInsnNodeWare;
+import com.alibaba.bytekit.asm.location.filter.GroupLocationFilter;
+import com.alibaba.bytekit.asm.location.filter.InvokeCheckLocationFilter;
+import com.alibaba.bytekit.asm.location.filter.InvokeContainLocationFilter;
+import com.alibaba.bytekit.asm.location.filter.LocationFilter;
+import com.alibaba.bytekit.utils.AsmOpUtils;
+import com.alibaba.bytekit.utils.AsmUtils;
+import com.taobao.arthas.common.Pair;
+import com.taobao.arthas.core.GlobalOptions;
+import com.taobao.arthas.core.advisor.SpyInterceptors.SpyInterceptor1;
+import com.taobao.arthas.core.advisor.SpyInterceptors.SpyInterceptor2;
+import com.taobao.arthas.core.advisor.SpyInterceptors.SpyInterceptor3;
+import com.taobao.arthas.core.advisor.SpyInterceptors.SpyTraceExcludeJDKInterceptor1;
+import com.taobao.arthas.core.advisor.SpyInterceptors.SpyTraceExcludeJDKInterceptor2;
+import com.taobao.arthas.core.advisor.SpyInterceptors.SpyTraceExcludeJDKInterceptor3;
+import com.taobao.arthas.core.advisor.SpyInterceptors.SpyTraceInterceptor1;
+import com.taobao.arthas.core.advisor.SpyInterceptors.SpyTraceInterceptor2;
+import com.taobao.arthas.core.advisor.SpyInterceptors.SpyTraceInterceptor3;
+import com.taobao.arthas.core.server.ArthasBootstrap;
+import com.taobao.arthas.core.util.ArthasCheckUtils;
+import com.taobao.arthas.core.util.ClassUtils;
+import com.taobao.arthas.core.util.FileUtils;
+import com.taobao.arthas.core.util.SearchUtils;
+import com.taobao.arthas.core.util.affect.EnhancerAffect;
+import com.taobao.arthas.core.util.matcher.Matcher;
+
+/**
+ * 对类进行通知增强 Created by vlinux on 15/5/17.
+ * @author hengyunabc
+ */
+public class Enhancer implements ClassFileTransformer {
+
+    private static final Logger logger = LoggerFactory.getLogger(Enhancer.class);
+
+    private final AdviceListener listener;
+    private final boolean isTracing;
+    private final boolean skipJDKTrace;
+    private final Matcher classNameMatcher;
+    private final Matcher classNameExcludeMatcher;
+    private final Matcher methodNameMatcher;
+    private final EnhancerAffect affect;
+    private Set<Class<?>> matchingClasses = null;
+    private static final ClassLoader selfClassLoader = Enhancer.class.getClassLoader();
+
+    // 被增强的类的缓存
+    private final static Map<Class<?>/* Class */, Object> classBytesCache = new WeakHashMap<Class<?>, Object>();
+    private static SpyImpl spyImpl = new SpyImpl();
+
+    static {
+        SpyAPI.setSpy(spyImpl);
+    }
+
+    /**
+     * @param adviceId          通知编号
+     * @param isTracing         可跟踪方法调用
+     * @param skipJDKTrace      是否忽略对JDK内部方法的跟踪
+     * @param matchingClasses   匹配中的类
+     * @param methodNameMatcher 方法名匹配
+     * @param affect            影响统计
+     */
+    public Enhancer(AdviceListener listener, boolean isTracing, boolean skipJDKTrace, Matcher classNameMatcher,
+            Matcher classNameExcludeMatcher,
+            Matcher methodNameMatcher) {
+        this.listener = listener;
+        this.isTracing = isTracing;
+        this.skipJDKTrace = skipJDKTrace;
+        this.classNameMatcher = classNameMatcher;
+        this.classNameExcludeMatcher = classNameExcludeMatcher;
+        this.methodNameMatcher = methodNameMatcher;
+        this.affect = new EnhancerAffect();
+        affect.setListenerId(listener.id());
+    }
+
+    @Override
+    public byte[] transform(final ClassLoader inClassLoader, String className, Class<?> classBeingRedefined,
+            ProtectionDomain protectionDomain, byte[] classfileBuffer) throws IllegalClassFormatException {
+        try {
+            // 检查classloader能否加载到 SpyAPI，如果不能，则放弃增强
+            try {
+                if (inClassLoader != null) {
+                    inClassLoader.loadClass(SpyAPI.class.getName());
+                }
+            } catch (Throwable e) {
+                logger.error("the classloader can not load SpyAPI, ignore it. classloader: {}, className: {}",
+                        inClassLoader.getClass().getName(), className, e);
+                return null;
+            }
+
+            // 这里要再次过滤一次，为啥？因为在transform的过程中，有可能还会再诞生新的类
+            // 所以需要将之前需要转换的类集合传递下来，再次进行判断
+            if (matchingClasses != null && !matchingClasses.contains(classBeingRedefined)) {
+                return null;
+            }
+
+            //keep origin class reader for bytecode optimizations, avoiding JVM metaspace OOM.
+            ClassNode classNode = new ClassNode(Opcodes.ASM9);
+            ClassReader classReader = AsmUtils.toClassNode(classfileBuffer, classNode);
+            // remove JSR https://github.com/alibaba/arthas/issues/1304
+            classNode = AsmUtils.removeJSRInstructions(classNode);
+
+            // 生成增强字节码
+            DefaultInterceptorClassParser defaultInterceptorClassParser = new DefaultInterceptorClassParser();
+
+            final List<InterceptorProcessor> interceptorProcessors = new ArrayList<InterceptorProcessor>();
+
+            interceptorProcessors.addAll(defaultInterceptorClassParser.parse(SpyInterceptor1.class));
+            interceptorProcessors.addAll(defaultInterceptorClassParser.parse(SpyInterceptor2.class));
+            interceptorProcessors.addAll(defaultInterceptorClassParser.parse(SpyInterceptor3.class));
+
+            if (this.isTracing) {
+                if (!this.skipJDKTrace) {
+                    interceptorProcessors.addAll(defaultInterceptorClassParser.parse(SpyTraceInterceptor1.class));
+                    interceptorProcessors.addAll(defaultInterceptorClassParser.parse(SpyTraceInterceptor2.class));
+                    interceptorProcessors.addAll(defaultInterceptorClassParser.parse(SpyTraceInterceptor3.class));
+                } else {
+                    interceptorProcessors.addAll(defaultInterceptorClassParser.parse(SpyTraceExcludeJDKInterceptor1.class));
+                    interceptorProcessors.addAll(defaultInterceptorClassParser.parse(SpyTraceExcludeJDKInterceptor2.class));
+                    interceptorProcessors.addAll(defaultInterceptorClassParser.parse(SpyTraceExcludeJDKInterceptor3.class));
+                }
+            }
+
+            List<MethodNode> matchedMethods = new ArrayList<MethodNode>();
+            for (MethodNode methodNode : classNode.methods) {
+                if (!isIgnore(methodNode, methodNameMatcher)) {
+                    matchedMethods.add(methodNode);
+                }
+            }
+
+            // https://github.com/alibaba/arthas/issues/1690
+            if (AsmUtils.isEnhancerByCGLIB(className)) {
+                for (MethodNode methodNode : matchedMethods) {
+                    if (AsmUtils.isConstructor(methodNode)) {
+                        AsmUtils.fixConstructorExceptionTable(methodNode);
+                    }
+                }
+            }
+
+            // 用于检查是否已插入了 spy函数，如果已有则不重复处理
+            GroupLocationFilter groupLocationFilter = new GroupLocationFilter();
+
+            LocationFilter enterFilter = new InvokeContainLocationFilter(Type.getInternalName(SpyAPI.class), "atEnter",
+                    LocationType.ENTER);
+            LocationFilter existFilter = new InvokeContainLocationFilter(Type.getInternalName(SpyAPI.class), "atExit",
+                    LocationType.EXIT);
+            LocationFilter exceptionFilter = new InvokeContainLocationFilter(Type.getInternalName(SpyAPI.class),
+                    "atExceptionExit", LocationType.EXCEPTION_EXIT);
+
+            groupLocationFilter.addFilter(enterFilter);
+            groupLocationFilter.addFilter(existFilter);
+            groupLocationFilter.addFilter(exceptionFilter);
+
+            LocationFilter invokeBeforeFilter = new InvokeCheckLocationFilter(Type.getInternalName(SpyAPI.class),
+                    "atBeforeInvoke", LocationType.INVOKE);
+            LocationFilter invokeAfterFilter = new InvokeCheckLocationFilter(Type.getInternalName(SpyAPI.class),
+                    "atInvokeException", LocationType.INVOKE_COMPLETED);
+            LocationFilter invokeExceptionFilter = new InvokeCheckLocationFilter(Type.getInternalName(SpyAPI.class),
+                    "atInvokeException", LocationType.INVOKE_EXCEPTION_EXIT);
+            groupLocationFilter.addFilter(invokeBeforeFilter);
+            groupLocationFilter.addFilter(invokeAfterFilter);
+            groupLocationFilter.addFilter(invokeExceptionFilter);
+
+            for (MethodNode methodNode : matchedMethods) {
+                if (AsmUtils.isNative(methodNode)) {
+                    logger.info("ignore native method: {}",
+                            AsmUtils.methodDeclaration(Type.getObjectType(classNode.name), methodNode));
+                    continue;
+                }
+                // 先查找是否有 atBeforeInvoke 函数，如果有，则说明已经有trace了，则直接不再尝试增强，直接插入 listener
+                if(AsmUtils.containsMethodInsnNode(methodNode, Type.getInternalName(SpyAPI.class), "atBeforeInvoke")) {
+                    for (AbstractInsnNode insnNode = methodNode.instructions.getFirst(); insnNode != null; insnNode = insnNode
+                            .getNext()) {
+                        if (insnNode instanceof MethodInsnNode) {
+                            final MethodInsnNode methodInsnNode = (MethodInsnNode) insnNode;
+                            if(this.skipJDKTrace) {
+                                if(methodInsnNode.owner.startsWith("java/")) {
+                                    continue;
+                                }
+                            }
+                            // 原始类型的box类型相关的都跳过
+                            if(AsmOpUtils.isBoxType(Type.getObjectType(methodInsnNode.owner))) {
+                                continue;
+                            }
+                            AdviceListenerManager.registerTraceAdviceListener(inClassLoader, className,
+                                    methodInsnNode.owner, methodInsnNode.name, methodInsnNode.desc, listener);
+                        }
+                    }
+                }else {
+                    MethodProcessor methodProcessor = new MethodProcessor(classNode, methodNode, groupLocationFilter);
+                    for (InterceptorProcessor interceptor : interceptorProcessors) {
+                        try {
+                            List<Location> locations = interceptor.process(methodProcessor);
+                            for (Location location : locations) {
+                                if (location instanceof MethodInsnNodeWare) {
+                                    MethodInsnNodeWare methodInsnNodeWare = (MethodInsnNodeWare) location;
+                                    MethodInsnNode methodInsnNode = methodInsnNodeWare.methodInsnNode();
+
+                                    AdviceListenerManager.registerTraceAdviceListener(inClassLoader, className,
+                                            methodInsnNode.owner, methodInsnNode.name, methodInsnNode.desc, listener);
+                                }
+                            }
+
+                        } catch (Throwable e) {
+                            logger.error("enhancer error, class: {}, method: {}, interceptor: {}", classNode.name, methodNode.name, interceptor.getClass().getName(), e);
+                        }
+                    }
+                }
+
+                // enter/exist 总是要插入 listener
+                AdviceListenerManager.registerAdviceListener(inClassLoader, className, methodNode.name, methodNode.desc,
+                        listener);
+                affect.addMethodAndCount(inClassLoader, className, methodNode.name, methodNode.desc);
+            }
+
+            // https://github.com/alibaba/arthas/issues/1223 , V1_5 的major version是49
+            if (AsmUtils.getMajorVersion(classNode.version) < 49) {
+                classNode.version = AsmUtils.setMajorVersion(classNode.version, 49);
+            }
+
+            byte[] enhanceClassByteArray = AsmUtils.toBytes(classNode, inClassLoader, classReader);
+
+            // 增强成功，记录类
+            classBytesCache.put(classBeingRedefined, new Object());
+
+            // dump the class
+            dumpClassIfNecessary(className, enhanceClassByteArray, affect);
+
+            // 成功计数
+            affect.cCnt(1);
+
+            return enhanceClassByteArray;
+        } catch (Throwable t) {
+            logger.warn("transform loader[{}]:class[{}] failed.", inClassLoader, className, t);
+            affect.setThrowable(t);
+        }
+
+        return null;
+    }
+
+    /**
+     * 是否抽象属性
+     */
+    private boolean isAbstract(int access) {
+        return (Opcodes.ACC_ABSTRACT & access) == Opcodes.ACC_ABSTRACT;
+    }
+
+    /**
+     * 是否需要忽略
+     */
+    private boolean isIgnore(MethodNode methodNode, Matcher methodNameMatcher) {
+        return null == methodNode || isAbstract(methodNode.access) || !methodNameMatcher.matching(methodNode.name)
+                || ArthasCheckUtils.isEquals(methodNode.name, "<clinit>");
+    }
+
+    /**
+     * dump class to file
+     */
+    private static void dumpClassIfNecessary(String className, byte[] data, EnhancerAffect affect) {
+        if (!GlobalOptions.isDump) {
+            return;
+        }
+        final File dumpClassFile = new File("./arthas-class-dump/" + className + ".class");
+        final File classPath = new File(dumpClassFile.getParent());
+
+        // 创建类所在的包路径
+        if (!classPath.mkdirs() && !classPath.exists()) {
+            logger.warn("create dump classpath:{} failed.", classPath);
+            return;
+        }
+
+        // 将类字节码写入文件
+        try {
+            FileUtils.writeByteArrayToFile(dumpClassFile, data);
+            affect.addClassDumpFile(dumpClassFile);
+            if (GlobalOptions.verbose) {
+                logger.info("dump enhanced class: {}, path: {}", className, dumpClassFile);
+            }
+        } catch (IOException e) {
+            logger.warn("dump class:{} to file {} failed.", className, dumpClassFile, e);
+        }
+
+    }
+
+    /**
+     * 是否需要过滤的类
+     *
+     * @param classes 类集合
+     */
+    private List<Pair<Class<?>, String>> filter(Set<Class<?>> classes) {
+        List<Pair<Class<?>, String>> filteredClasses = new ArrayList<Pair<Class<?>, String>>();
+        final Iterator<Class<?>> it = classes.iterator();
+        while (it.hasNext()) {
+            final Class<?> clazz = it.next();
+            boolean removeFlag = false;
+            if (null == clazz) {
+                removeFlag = true;
+            } else if (isSelf(clazz)) {
+                filteredClasses.add(new Pair<Class<?>, String>(clazz, "class loaded by arthas itself"));
+                removeFlag = true;
+            } else if (isUnsafeClass(clazz)) {
+                filteredClasses.add(new Pair<Class<?>, String>(clazz, "class loaded by Bootstrap Classloader, try to execute `options unsafe true`"));
+                removeFlag = true;
+            } else if (isExclude(clazz)) {
+                filteredClasses.add(new Pair<Class<?>, String>(clazz, "class is excluded"));
+                removeFlag = true;
+            } else {
+                Pair<Boolean, String> unsupportedResult = isUnsupportedClass(clazz);
+                if (unsupportedResult.getFirst()) {
+                    filteredClasses.add(new Pair<Class<?>, String>(clazz, unsupportedResult.getSecond()));
+                    removeFlag = true;
+                }
+            }
+            if (removeFlag) {
+                it.remove();
+            }
+        }
+        return filteredClasses;
+    }
+
+    private boolean isExclude(Class<?> clazz) {
+        if (this.classNameExcludeMatcher != null) {
+            return classNameExcludeMatcher.matching(clazz.getName());
+        }
+        return false;
+    }
+
+    /**
+     * 是否过滤Arthas加载的类
+     */
+    private static boolean isSelf(Class<?> clazz) {
+        return null != clazz && isEquals(clazz.getClassLoader(), selfClassLoader);
+    }
+
+    /**
+     * 是否过滤unsafe类
+     */
+    private static boolean isUnsafeClass(Class<?> clazz) {
+        return !GlobalOptions.isUnsafe && clazz.getClassLoader() == null;
+    }
+
+    /**
+     * 是否过滤目前暂不支持的类
+     */
+    private static Pair<Boolean, String> isUnsupportedClass(Class<?> clazz) {
+        if (ClassUtils.isLambdaClass(clazz)) {
+            return new Pair<Boolean, String>(Boolean.TRUE, "class is lambda");
+        }
+
+        if (clazz.isInterface() && !GlobalOptions.isSupportDefaultMethod) {
+            return new Pair<Boolean, String>(Boolean.TRUE, "class is interface");
+        }
+
+        if (clazz.equals(Integer.class)) {
+            return new Pair<Boolean, String>(Boolean.TRUE, "class is java.lang.Integer");
+        }
+
+        if (clazz.equals(Class.class)) {
+            return new Pair<Boolean, String>(Boolean.TRUE, "class is java.lang.Class");
+        }
+
+        if (clazz.equals(Method.class)) {
+            return new Pair<Boolean, String>(Boolean.TRUE, "class is java.lang.Method");
+        }
+
+        if (clazz.isArray()) {
+            return new Pair<Boolean, String>(Boolean.TRUE, "class is array");
+        }
+        return new Pair<Boolean, String>(Boolean.FALSE, "");
+    }
+
+    /**
+     * 对象增强
+     *
+     * @param inst              inst
+     * @param adviceId          通知ID
+     * @param isTracing         可跟踪方法调用
+     * @param skipJDKTrace      是否忽略对JDK内部方法的跟踪
+     * @param classNameMatcher  类名匹配
+     * @param methodNameMatcher 方法名匹配
+     * @return 增强影响范围
+     * @throws UnmodifiableClassException 增强失败
+     */
+    public synchronized EnhancerAffect enhance(final Instrumentation inst) throws UnmodifiableClassException {
+        // 获取需要增强的类集合
+        this.matchingClasses = GlobalOptions.isDisableSubClass
+                ? SearchUtils.searchClass(inst, classNameMatcher)
+                : SearchUtils.searchSubClass(inst, SearchUtils.searchClass(inst, classNameMatcher));
+
+        // 过滤掉无法被增强的类
+        List<Pair<Class<?>, String>> filtedList = filter(matchingClasses);
+        if (!filtedList.isEmpty()) {
+            for (Pair<Class<?>, String> filted : filtedList) {
+                logger.info("ignore class: {}, reason: {}", filted.getFirst().getName(), filted.getSecond());
+            }
+        }
+
+        logger.info("enhance matched classes: {}", matchingClasses);
+
+        affect.setTransformer(this);
+
+        try {
+            ArthasBootstrap.getInstance().getTransformerManager().addTransformer(this, isTracing);
+
+            // 批量增强
+            if (GlobalOptions.isBatchReTransform) {
+                final int size = matchingClasses.size();
+                final Class<?>[] classArray = new Class<?>[size];
+                arraycopy(matchingClasses.toArray(), 0, classArray, 0, size);
+                if (classArray.length > 0) {
+                    inst.retransformClasses(classArray);
+                    logger.info("Success to batch transform classes: " + Arrays.toString(classArray));
+                }
+            } else {
+                // for each 增强
+                for (Class<?> clazz : matchingClasses) {
+                    try {
+                        inst.retransformClasses(clazz);
+                        logger.info("Success to transform class: " + clazz);
+                    } catch (Throwable t) {
+                        logger.warn("retransform {} failed.", clazz, t);
+                        if (t instanceof UnmodifiableClassException) {
+                            throw (UnmodifiableClassException) t;
+                        } else if (t instanceof RuntimeException) {
+                            throw (RuntimeException) t;
+                        } else {
+                            throw new RuntimeException(t);
+                        }
+                    }
+                }
+            }
+        } catch (Throwable e) {
+            logger.error("Enhancer error, matchingClasses: {}", matchingClasses, e);
+            affect.setThrowable(e);
+        }
+
+        return affect;
+    }
+
+    /**
+     * 重置指定的Class
+     *
+     * @param inst             inst
+     * @param classNameMatcher 类名匹配
+     * @return 增强影响范围
+     * @throws UnmodifiableClassException
+     */
+    public static synchronized EnhancerAffect reset(final Instrumentation inst, final Matcher classNameMatcher)
+            throws UnmodifiableClassException {
+
+        final EnhancerAffect affect = new EnhancerAffect();
+        final Set<Class<?>> enhanceClassSet = new HashSet<Class<?>>();
+
+        for (Class<?> classInCache : classBytesCache.keySet()) {
+            if (classNameMatcher.matching(classInCache.getName())) {
+                enhanceClassSet.add(classInCache);
+            }
+        }
+
+        try {
+            enhance(inst, enhanceClassSet);
+            logger.info("Success to reset classes: " + enhanceClassSet);
+        } finally {
+            for (Class<?> resetClass : enhanceClassSet) {
+                classBytesCache.remove(resetClass);
+                affect.cCnt(1);
+            }
+        }
+
+        return affect;
+    }
+
+    // 批量增强
+    private static void enhance(Instrumentation inst, Set<Class<?>> classes)
+            throws UnmodifiableClassException {
+        int size = classes.size();
+        Class<?>[] classArray = new Class<?>[size];
+        arraycopy(classes.toArray(), 0, classArray, 0, size);
+        if (classArray.length > 0) {
+            inst.retransformClasses(classArray);
+        }
+    }
+}

core/src/main/java/com/taobao/arthas/core/advisor/InvokeTraceable.java

+package com.taobao.arthas.core.advisor;
+
+/**
+ * 方法调用跟踪<br/>
+ * 当一个方法内部调用另外一个方法时，会触发此跟踪方法
+ * Created by vlinux on 15/5/27.
+ */
+public interface InvokeTraceable {
+
+    /**
+     * 调用之前跟踪
+     *
+     * @param tracingClassName  调用类名
+     * @param tracingMethodName 调用方法名
+     * @param tracingMethodDesc 调用方法描述
+     * @param tracingLineNumber 执行调用行数
+     * @throws Throwable 通知过程出错
+     */
+    void invokeBeforeTracing(
+            ClassLoader classLoader,
+            String tracingClassName,
+            String tracingMethodName,
+            String tracingMethodDesc,
+            int tracingLineNumber) throws Throwable;
+
+    /**
+     * 抛异常后跟踪
+     *
+     * @param tracingClassName  调用类名
+     * @param tracingMethodName 调用方法名
+     * @param tracingMethodDesc 调用方法描述
+     * @param tracingLineNumber 执行调用行数
+     * @throws Throwable 通知过程出错
+     */
+    void invokeThrowTracing(
+            ClassLoader classLoader,
+            String tracingClassName,
+            String tracingMethodName,
+            String tracingMethodDesc,
+            int tracingLineNumber) throws Throwable;
+
+
+    /**
+     * 调用之后跟踪
+     *
+     * @param tracingClassName  调用类名
+     * @param tracingMethodName 调用方法名
+     * @param tracingMethodDesc 调用方法描述
+     * @param tracingLineNumber 执行调用行数
+     * @throws Throwable 通知过程出错
+     */
+    void invokeAfterTracing(
+            ClassLoader classLoader,
+            String tracingClassName,
+            String tracingMethodName,
+            String tracingMethodDesc,
+            int tracingLineNumber) throws Throwable;
+
+
+}

core/src/main/java/com/taobao/arthas/core/advisor/SpyImpl.java

+package com.taobao.arthas.core.advisor;
+
+import java.arthas.SpyAPI.AbstractSpy;
+import java.util.List;
+
+import com.alibaba.arthas.deps.org.slf4j.Logger;
+import com.alibaba.arthas.deps.org.slf4j.LoggerFactory;
+import com.taobao.arthas.core.shell.system.ExecStatus;
+import com.taobao.arthas.core.shell.system.ProcessAware;
+import com.taobao.arthas.core.util.StringUtils;
+
+/**
+ * <pre>
+ * 怎么从 className|methodDesc 到 id 对应起来？？
+ * 当id少时，可以id自己来判断是否符合？
+ * 
+ * 如果是每个 className|methodDesc 为 key ，是否
+ * </pre>
+ * 
+ * @author hengyunabc 2020-04-24
+ *
+ */
+public class SpyImpl extends AbstractSpy {
+    private static final Logger logger = LoggerFactory.getLogger(SpyImpl.class);
+
+    @Override
+    public void atEnter(Class<?> clazz, String methodInfo, Object target, Object[] args) {
+        ClassLoader classLoader = clazz.getClassLoader();
+
+        String[] info = StringUtils.splitMethodInfo(methodInfo);
+        String methodName = info[0];
+        String methodDesc = info[1];
+        // TODO listener 只用查一次，放到 thread local里保存起来就可以了！
+        List<AdviceListener> listeners = AdviceListenerManager.queryAdviceListeners(classLoader, clazz.getName(),
+                methodName, methodDesc);
+        if (listeners != null) {
+            for (AdviceListener adviceListener : listeners) {
+                try {
+                    if (skipAdviceListener(adviceListener)) {
+                        continue;
+                    }
+                    adviceListener.before(clazz, methodName, methodDesc, target, args);
+                } catch (Throwable e) {
+                    logger.error("class: {}, methodInfo: {}", clazz.getName(), methodInfo, e);
+                }
+            }
+        }
+
+    }
+
+    @Override
+    public void atExit(Class<?> clazz, String methodInfo, Object target, Object[] args, Object returnObject) {
+        ClassLoader classLoader = clazz.getClassLoader();
+
+        String[] info = StringUtils.splitMethodInfo(methodInfo);
+        String methodName = info[0];
+        String methodDesc = info[1];
+
+        List<AdviceListener> listeners = AdviceListenerManager.queryAdviceListeners(classLoader, clazz.getName(),
+                methodName, methodDesc);
+        if (listeners != null) {
+            for (AdviceListener adviceListener : listeners) {
+                try {
+                    if (skipAdviceListener(adviceListener)) {
+                        continue;
+                    }
+                    adviceListener.afterReturning(clazz, methodName, methodDesc, target, args, returnObject);
+                } catch (Throwable e) {
+                    logger.error("class: {}, methodInfo: {}", clazz.getName(), methodInfo, e);
+                }
+            }
+        }
+    }
+
+    @Override
+    public void atExceptionExit(Class<?> clazz, String methodInfo, Object target, Object[] args, Throwable throwable) {
+        ClassLoader classLoader = clazz.getClassLoader();
+
+        String[] info = StringUtils.splitMethodInfo(methodInfo);
+        String methodName = info[0];
+        String methodDesc = info[1];
+
+        List<AdviceListener> listeners = AdviceListenerManager.queryAdviceListeners(classLoader, clazz.getName(),
+                methodName, methodDesc);
+        if (listeners != null) {
+            for (AdviceListener adviceListener : listeners) {
+                try {
+                    if (skipAdviceListener(adviceListener)) {
+                        continue;
+                    }
+                    adviceListener.afterThrowing(clazz, methodName, methodDesc, target, args, throwable);
+                } catch (Throwable e) {
+                    logger.error("class: {}, methodInfo: {}", clazz.getName(), methodInfo, e);
+                }
+            }
+        }
+    }
+
+    @Override
+    public void atBeforeInvoke(Class<?> clazz, String invokeInfo, Object target) {
+        ClassLoader classLoader = clazz.getClassLoader();
+        String[] info = StringUtils.splitInvokeInfo(invokeInfo);
+        String owner = info[0];
+        String methodName = info[1];
+        String methodDesc = info[2];
+
+        List<AdviceListener> listeners = AdviceListenerManager.queryTraceAdviceListeners(classLoader, clazz.getName(),
+                owner, methodName, methodDesc);
+
+        if (listeners != null) {
+            for (AdviceListener adviceListener : listeners) {
+                try {
+                    if (skipAdviceListener(adviceListener)) {
+                        continue;
+                    }
+                    final InvokeTraceable listener = (InvokeTraceable) adviceListener;
+                    listener.invokeBeforeTracing(classLoader, owner, methodName, methodDesc, Integer.parseInt(info[3]));
+                } catch (Throwable e) {
+                    logger.error("class: {}, invokeInfo: {}", clazz.getName(), invokeInfo, e);
+                }
+            }
+        }
+    }
+
+    @Override
+    public void atAfterInvoke(Class<?> clazz, String invokeInfo, Object target) {
+        ClassLoader classLoader = clazz.getClassLoader();
+        String[] info = StringUtils.splitInvokeInfo(invokeInfo);
+        String owner = info[0];
+        String methodName = info[1];
+        String methodDesc = info[2];
+        List<AdviceListener> listeners = AdviceListenerManager.queryTraceAdviceListeners(classLoader, clazz.getName(),
+                owner, methodName, methodDesc);
+
+        if (listeners != null) {
+            for (AdviceListener adviceListener : listeners) {
+                try {
+                    if (skipAdviceListener(adviceListener)) {
+                        continue;
+                    }
+                    final InvokeTraceable listener = (InvokeTraceable) adviceListener;
+                    listener.invokeAfterTracing(classLoader, owner, methodName, methodDesc, Integer.parseInt(info[3]));
+                } catch (Throwable e) {
+                    logger.error("class: {}, invokeInfo: {}", clazz.getName(), invokeInfo, e);
+                }
+            }
+        }
+
+    }
+
+    @Override
+    public void atInvokeException(Class<?> clazz, String invokeInfo, Object target, Throwable throwable) {
+        ClassLoader classLoader = clazz.getClassLoader();
+        String[] info = StringUtils.splitInvokeInfo(invokeInfo);
+        String owner = info[0];
+        String methodName = info[1];
+        String methodDesc = info[2];
+
+        List<AdviceListener> listeners = AdviceListenerManager.queryTraceAdviceListeners(classLoader, clazz.getName(),
+                owner, methodName, methodDesc);
+
+        if (listeners != null) {
+            for (AdviceListener adviceListener : listeners) {
+                try {
+                    if (skipAdviceListener(adviceListener)) {
+                        continue;
+                    }
+                    final InvokeTraceable listener = (InvokeTraceable) adviceListener;
+                    listener.invokeThrowTracing(classLoader, owner, methodName, methodDesc, Integer.parseInt(info[3]));
+                } catch (Throwable e) {
+                    logger.error("class: {}, invokeInfo: {}", clazz.getName(), invokeInfo, e);
+                }
+            }
+        }
+    }
+
+    private static boolean skipAdviceListener(AdviceListener adviceListener) {
+        if (adviceListener instanceof ProcessAware) {
+            ProcessAware processAware = (ProcessAware) adviceListener;
+            ExecStatus status = processAware.getProcess().status();
+            if (status.equals(ExecStatus.TERMINATED) || status.equals(ExecStatus.STOPPED)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+}
\ No newline at end of file

core/src/main/java/com/taobao/arthas/core/advisor/SpyInterceptors.java

+package com.taobao.arthas.core.advisor;
+
+import java.arthas.SpyAPI;
+
+import com.alibaba.bytekit.asm.binding.Binding;
+import com.alibaba.bytekit.asm.interceptor.annotation.AtEnter;
+import com.alibaba.bytekit.asm.interceptor.annotation.AtExceptionExit;
+import com.alibaba.bytekit.asm.interceptor.annotation.AtExit;
+import com.alibaba.bytekit.asm.interceptor.annotation.AtInvoke;
+import com.alibaba.bytekit.asm.interceptor.annotation.AtInvokeException;
+
+/**
+ * 
+ * @author hengyunabc 2020-06-05
+ *
+ */
+public class SpyInterceptors {
+
+    public static class SpyInterceptor1 {
+
+        @AtEnter(inline = true)
+        public static void atEnter(@Binding.This Object target, @Binding.Class Class<?> clazz,
+                @Binding.MethodInfo String methodInfo, @Binding.Args Object[] args) {
+            SpyAPI.atEnter(clazz, methodInfo, target, args);
+        }
+    }
+    
+    public static class SpyInterceptor2 {
+        @AtExit(inline = true)
+        public static void atExit(@Binding.This Object target, @Binding.Class Class<?> clazz,
+                @Binding.MethodInfo String methodInfo, @Binding.Args Object[] args, @Binding.Return Object returnObj) {
+            SpyAPI.atExit(clazz, methodInfo, target, args, returnObj);
+        }
+    }
+    
+    public static class SpyInterceptor3 {
+        @AtExceptionExit(inline = true)
+        public static void atExceptionExit(@Binding.This Object target, @Binding.Class Class<?> clazz,
+                @Binding.MethodInfo String methodInfo, @Binding.Args Object[] args,
+                @Binding.Throwable Throwable throwable) {
+            SpyAPI.atExceptionExit(clazz, methodInfo, target, args, throwable);
+        }
+    }
+
+    public static class SpyTraceInterceptor1 {
+        @AtInvoke(name = "", inline = true, whenComplete = false, excludes = {"java.arthas.SpyAPI", "java.lang.Byte"
+                , "java.lang.Boolean"
+                , "java.lang.Short"
+                , "java.lang.Character"
+                , "java.lang.Integer"
+                , "java.lang.Float"
+                , "java.lang.Long"
+                , "java.lang.Double"})
+        public static void onInvoke(@Binding.This Object target, @Binding.Class Class<?> clazz,
+                @Binding.InvokeInfo String invokeInfo) {
+            SpyAPI.atBeforeInvoke(clazz, invokeInfo, target);
+        }
+    }
+    
+    public static class SpyTraceInterceptor2 {
+        @AtInvoke(name = "", inline = true, whenComplete = true, excludes = {"java.arthas.SpyAPI", "java.lang.Byte"
+                , "java.lang.Boolean"
+                , "java.lang.Short"
+                , "java.lang.Character"
+                , "java.lang.Integer"
+                , "java.lang.Float"
+                , "java.lang.Long"
+                , "java.lang.Double"})
+        public static void onInvokeAfter(@Binding.This Object target, @Binding.Class Class<?> clazz,
+                @Binding.InvokeInfo String invokeInfo) {
+            SpyAPI.atAfterInvoke(clazz, invokeInfo, target);
+        }
+    }
+    
+    public static class SpyTraceInterceptor3 {
+        @AtInvokeException(name = "", inline = true, excludes = {"java.arthas.SpyAPI", "java.lang.Byte"
+                , "java.lang.Boolean"
+                , "java.lang.Short"
+                , "java.lang.Character"
+                , "java.lang.Integer"
+                , "java.lang.Float"
+                , "java.lang.Long"
+                , "java.lang.Double"})
+        public static void onInvokeException(@Binding.This Object target, @Binding.Class Class<?> clazz,
+                @Binding.InvokeInfo String invokeInfo, @Binding.Throwable Throwable throwable) {
+            SpyAPI.atInvokeException(clazz, invokeInfo, target, throwable);
+        }
+    }
+
+    public static class SpyTraceExcludeJDKInterceptor1 {
+        @AtInvoke(name = "", inline = true, whenComplete = false, excludes = "java.**")
+        public static void onInvoke(@Binding.This Object target, @Binding.Class Class<?> clazz,
+                @Binding.InvokeInfo String invokeInfo) {
+            SpyAPI.atBeforeInvoke(clazz, invokeInfo, target);
+        }
+    }
+
+    public static class SpyTraceExcludeJDKInterceptor2 {
+        @AtInvoke(name = "", inline = true, whenComplete = true, excludes = "java.**")
+        public static void onInvokeAfter(@Binding.This Object target, @Binding.Class Class<?> clazz,
+                @Binding.InvokeInfo String invokeInfo) {
+            SpyAPI.atAfterInvoke(clazz, invokeInfo, target);
+        }
+    }
+
+    public static class SpyTraceExcludeJDKInterceptor3 {
+        @AtInvokeException(name = "", inline = true, excludes = "java.**")
+        public static void onInvokeException(@Binding.This Object target, @Binding.Class Class<?> clazz,
+                @Binding.InvokeInfo String invokeInfo, @Binding.Throwable Throwable throwable) {
+            SpyAPI.atInvokeException(clazz, invokeInfo, target, throwable);
+        }
+    }
+
+}

core/src/main/java/com/taobao/arthas/core/advisor/TransformerManager.java

+package com.taobao.arthas.core.advisor;
+
+import java.lang.instrument.ClassFileTransformer;
+import java.lang.instrument.IllegalClassFormatException;
+import java.lang.instrument.Instrumentation;
+import java.security.ProtectionDomain;
+import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
+
+/**
+ * 
+ * <pre>
+ * * 统一管理 ClassFileTransformer
+ * * 每个增强命令对应一个 Enhancer ，也统一在这里管理
+ * </pre>
+ * 
+ * @see com.taobao.arthas.core.advisor.Enhancer
+ * @author hengyunabc 2020-05-18
+ *
+ */
+public class TransformerManager {
+
+    private Instrumentation instrumentation;
+    private List<ClassFileTransformer> watchTransformers = new CopyOnWriteArrayList<ClassFileTransformer>();
+    private List<ClassFileTransformer> traceTransformers = new CopyOnWriteArrayList<ClassFileTransformer>();
+    
+    /**
+     * 先于 watch/trace的 Transformer TODO 改进为全部用 order 排序？
+     */
+    private List<ClassFileTransformer> reTransformers = new CopyOnWriteArrayList<ClassFileTransformer>();
+
+    private ClassFileTransformer classFileTransformer;
+
+    public TransformerManager(Instrumentation instrumentation) {
+        this.instrumentation = instrumentation;
+
+        classFileTransformer = new ClassFileTransformer() {
+
+            @Override
+            public byte[] transform(ClassLoader loader, String className, Class<?> classBeingRedefined,
+                    ProtectionDomain protectionDomain, byte[] classfileBuffer) throws IllegalClassFormatException {
+                for (ClassFileTransformer classFileTransformer : reTransformers) {
+                    byte[] transformResult = classFileTransformer.transform(loader, className, classBeingRedefined,
+                            protectionDomain, classfileBuffer);
+                    if (transformResult != null) {
+                        classfileBuffer = transformResult;
+                    }
+                }
+
+                for (ClassFileTransformer classFileTransformer : watchTransformers) {
+                    byte[] transformResult = classFileTransformer.transform(loader, className, classBeingRedefined,
+                            protectionDomain, classfileBuffer);
+                    if (transformResult != null) {
+                        classfileBuffer = transformResult;
+                    }
+                }
+
+                for (ClassFileTransformer classFileTransformer : traceTransformers) {
+                    byte[] transformResult = classFileTransformer.transform(loader, className, classBeingRedefined,
+                            protectionDomain, classfileBuffer);
+                    if (transformResult != null) {
+                        classfileBuffer = transformResult;
+                    }
+                }
+
+                return classfileBuffer;
+            }
+
+        };
+        instrumentation.addTransformer(classFileTransformer, true);
+    }
+
+    public void addTransformer(ClassFileTransformer transformer, boolean isTracing) {
+        if (isTracing) {
+            traceTransformers.add(transformer);
+        } else {
+            watchTransformers.add(transformer);
+        }
+    }
+
+    public void addRetransformer(ClassFileTransformer transformer) {
+        reTransformers.add(transformer);
+    }
+
+    public void removeTransformer(ClassFileTransformer transformer) {
+        reTransformers.remove(transformer);
+        watchTransformers.remove(transformer);
+        traceTransformers.remove(transformer);
+    }
+
+    public void destroy() {
+        reTransformers.clear();
+        watchTransformers.clear();
+        traceTransformers.clear();
+        instrumentation.removeTransformer(classFileTransformer);
+    }
+
+}

core/src/main/java/com/taobao/arthas/core/command/BuiltinCommandPack.java

+package com.taobao.arthas.core.command;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import com.taobao.arthas.core.command.basic1000.AuthCommand;
+import com.taobao.arthas.core.command.basic1000.Base64Command;
+import com.taobao.arthas.core.command.basic1000.CatCommand;
+import com.taobao.arthas.core.command.basic1000.ClsCommand;
+import com.taobao.arthas.core.command.basic1000.EchoCommand;
+import com.taobao.arthas.core.command.basic1000.GrepCommand;
+import com.taobao.arthas.core.command.basic1000.HelpCommand;
+import com.taobao.arthas.core.command.basic1000.HistoryCommand;
+import com.taobao.arthas.core.command.basic1000.KeymapCommand;
+import com.taobao.arthas.core.command.basic1000.OptionsCommand;
+import com.taobao.arthas.core.command.basic1000.PwdCommand;
+import com.taobao.arthas.core.command.basic1000.ResetCommand;
+import com.taobao.arthas.core.command.basic1000.SessionCommand;
+import com.taobao.arthas.core.command.basic1000.StopCommand;
+import com.taobao.arthas.core.command.basic1000.SystemEnvCommand;
+import com.taobao.arthas.core.command.basic1000.SystemPropertyCommand;
+import com.taobao.arthas.core.command.basic1000.TeeCommand;
+import com.taobao.arthas.core.command.basic1000.VMOptionCommand;
+import com.taobao.arthas.core.command.basic1000.VersionCommand;
+import com.taobao.arthas.core.command.hidden.JulyCommand;
+import com.taobao.arthas.core.command.hidden.ThanksCommand;
+import com.taobao.arthas.core.command.klass100.ClassLoaderCommand;
+import com.taobao.arthas.core.command.klass100.DumpClassCommand;
+import com.taobao.arthas.core.command.klass100.GetStaticCommand;
+import com.taobao.arthas.core.command.klass100.JadCommand;
+import com.taobao.arthas.core.command.klass100.MemoryCompilerCommand;
+import com.taobao.arthas.core.command.klass100.OgnlCommand;
+import com.taobao.arthas.core.command.klass100.RedefineCommand;
+import com.taobao.arthas.core.command.klass100.RetransformCommand;
+import com.taobao.arthas.core.command.klass100.SearchClassCommand;
+import com.taobao.arthas.core.command.klass100.SearchMethodCommand;
+import com.taobao.arthas.core.command.logger.LoggerCommand;
+import com.taobao.arthas.core.command.monitor200.DashboardCommand;
+import com.taobao.arthas.core.command.monitor200.HeapDumpCommand;
+import com.taobao.arthas.core.command.monitor200.JvmCommand;
+import com.taobao.arthas.core.command.monitor200.MBeanCommand;
+import com.taobao.arthas.core.command.monitor200.MemoryCommand;
+import com.taobao.arthas.core.command.monitor200.MonitorCommand;
+import com.taobao.arthas.core.command.monitor200.PerfCounterCommand;
+import com.taobao.arthas.core.command.monitor200.ProfilerCommand;
+import com.taobao.arthas.core.command.monitor200.StackCommand;
+import com.taobao.arthas.core.command.monitor200.ThreadCommand;
+import com.taobao.arthas.core.command.monitor200.TimeTunnelCommand;
+import com.taobao.arthas.core.command.monitor200.TraceCommand;
+import com.taobao.arthas.core.command.monitor200.VmToolCommand;
+import com.taobao.arthas.core.command.monitor200.WatchCommand;
+import com.taobao.arthas.core.shell.command.AnnotatedCommand;
+import com.taobao.arthas.core.shell.command.Command;
+import com.taobao.arthas.core.shell.command.CommandResolver;
+import com.taobao.middleware.cli.annotations.Name;
+
+/**
+ * TODO automatically discover the built-in commands.
+ * @author beiwei30 on 17/11/2016.
+ */
+public class BuiltinCommandPack implements CommandResolver {
+
+    private List<Command> commands = new ArrayList<Command>();
+
+    public BuiltinCommandPack(List<String> disabledCommands) {
+        initCommands(disabledCommands);
+    }
+
+    @Override
+    public List<Command> commands() {
+        return commands;
+    }
+
+    private void initCommands(List<String> disabledCommands) {
+        List<Class<? extends AnnotatedCommand>> commandClassList = new ArrayList<Class<? extends AnnotatedCommand>>(32);
+        commandClassList.add(HelpCommand.class);
+        commandClassList.add(AuthCommand.class);
+        commandClassList.add(KeymapCommand.class);
+        commandClassList.add(SearchClassCommand.class);
+        commandClassList.add(SearchMethodCommand.class);
+        commandClassList.add(ClassLoaderCommand.class);
+        commandClassList.add(JadCommand.class);
+        commandClassList.add(GetStaticCommand.class);
+        commandClassList.add(MonitorCommand.class);
+        commandClassList.add(StackCommand.class);
+        commandClassList.add(ThreadCommand.class);
+        commandClassList.add(TraceCommand.class);
+        commandClassList.add(WatchCommand.class);
+        commandClassList.add(TimeTunnelCommand.class);
+        commandClassList.add(JvmCommand.class);
+        commandClassList.add(MemoryCommand.class);
+        commandClassList.add(PerfCounterCommand.class);
+        // commandClassList.add(GroovyScriptCommand.class);
+        commandClassList.add(OgnlCommand.class);
+        commandClassList.add(MemoryCompilerCommand.class);
+        commandClassList.add(RedefineCommand.class);
+        commandClassList.add(RetransformCommand.class);
+        commandClassList.add(DashboardCommand.class);
+        commandClassList.add(DumpClassCommand.class);
+        commandClassList.add(HeapDumpCommand.class);
+        commandClassList.add(JulyCommand.class);
+        commandClassList.add(ThanksCommand.class);
+        commandClassList.add(OptionsCommand.class);
+        commandClassList.add(ClsCommand.class);
+        commandClassList.add(ResetCommand.class);
+        commandClassList.add(VersionCommand.class);
+        commandClassList.add(SessionCommand.class);
+        commandClassList.add(SystemPropertyCommand.class);
+        commandClassList.add(SystemEnvCommand.class);
+        commandClassList.add(VMOptionCommand.class);
+        commandClassList.add(LoggerCommand.class);
+        commandClassList.add(HistoryCommand.class);
+        commandClassList.add(CatCommand.class);
+        commandClassList.add(Base64Command.class);
+        commandClassList.add(EchoCommand.class);
+        commandClassList.add(PwdCommand.class);
+        commandClassList.add(MBeanCommand.class);
+        commandClassList.add(GrepCommand.class);
+        commandClassList.add(TeeCommand.class);
+        commandClassList.add(ProfilerCommand.class);
+        commandClassList.add(VmToolCommand.class);
+        commandClassList.add(StopCommand.class);
+
+        for (Class<? extends AnnotatedCommand> clazz : commandClassList) {
+            Name name = clazz.getAnnotation(Name.class);
+            if (name != null && name.value() != null) {
+                if (disabledCommands.contains(name.value())) {
+                    continue;
+                }
+            }
+            commands.add(Command.create(clazz));
+        }
+    }
+}

core/src/main/java/com/taobao/arthas/core/command/Constants.java

+package com.taobao.arthas.core.command;
+
+/**
+ * @author ralf0131 2016-12-14 17:21.
+ * @author hengyunabc 2018-12-03
+ */
+public interface Constants {
+
+    /**
+     * TODO improve the description
+     */
+    String EXPRESS_DESCRIPTION = "  The express may be one of the following expression (evaluated dynamically):\n" +
+            "          target : the object\n" +
+            "           clazz : the object's class\n" +
+            "          method : the constructor or method\n" +
+            "          params : the parameters array of method\n" +
+            "    params[0..n] : the element of parameters array\n" +
+            "       returnObj : the returned object of method\n" +
+            "        throwExp : the throw exception of method\n" +
+            "        isReturn : the method ended by return\n" +
+            "         isThrow : the method ended by throwing exception\n" +
+            "           #cost : the execution time in ms of method invocation";
+
+    String EXAMPLE = "\nEXAMPLES:\n";
+
+    String WIKI = "\nWIKI:\n";
+
+    String WIKI_HOME = "  https://arthas.aliyun.com/doc/";
+
+    String EXPRESS_EXAMPLES =   "Examples:\n" +
+                                "  params\n" +
+                                "  params[0]\n" +
+                                "  'params[0]+params[1]'\n" +
+                                "  '{params[0], target, returnObj}'\n" +
+                                "  returnObj\n" +
+                                "  throwExp\n" +
+                                "  target\n" +
+                                "  clazz\n" +
+                                "  method\n";
+
+    String CONDITION_EXPRESS =  "Conditional expression in ognl style, for example:\n" +
+                                "  TRUE  : 1==1\n" +
+                                "  TRUE  : true\n" +
+                                "  FALSE : false\n" +
+                                "  TRUE  : 'params.length>=0'\n" +
+                                "  FALSE : 1==2\n" +
+                                "  '#cost>100'\n";
+
+}

core/src/main/java/com/taobao/arthas/core/command/ScriptSupportCommand.java

+package com.taobao.arthas.core.command;
+
+import com.taobao.arthas.core.advisor.Advice;
+
+/**
+ * 脚本支持命令
+ * Created by vlinux on 15/6/1.
+ */
+public interface ScriptSupportCommand {
+
+    /**
+     * 增强脚本监听器
+     */
+    interface ScriptListener {
+
+        /**
+         * 脚本创建
+         *
+         * @param output 输出器
+         */
+        void create(Output output);
+
+        /**
+         * 脚本销毁
+         *
+         * @param output 输出器
+         */
+        void destroy(Output output);
+
+        /**
+         * 方法执行前
+         *
+         * @param output 输出器
+         * @param advice 通知点
+         */
+        void before(Output output, Advice advice);
+
+        /**
+         * 方法正常返回
+         *
+         * @param output 输出器
+         * @param advice 通知点
+         */
+        void afterReturning(Output output, Advice advice);
+
+        /**
+         * 方法异常返回
+         *
+         * @param output 输出器
+         * @param advice 通知点
+         */
+        void afterThrowing(Output output, Advice advice);
+
+    }
+
+    /**
+     * 脚本监听器适配器
+     */
+    class ScriptListenerAdapter implements ScriptListener {
+
+        @Override
+        public void create(Output output) {
+
+        }
+
+        @Override
+        public void destroy(Output output) {
+
+        }
+
+        @Override
+        public void before(Output output, Advice advice) {
+
+        }
+
+        @Override
+        public void afterReturning(Output output, Advice advice) {
+
+        }
+
+        @Override
+        public void afterThrowing(Output output, Advice advice) {
+
+        }
+    }
+
+
+    /**
+     * 输出器
+     */
+    interface Output {
+
+        /**
+         * 输出字符串(不换行)
+         *
+         * @param string 待输出字符串
+         * @return this
+         */
+        Output print(String string);
+
+        /**
+         * 输出字符串(换行)
+         *
+         * @param string 待输出字符串
+         * @return this
+         */
+        Output println(String string);
+
+        /**
+         * 结束当前脚本
+         *
+         * @return this
+         */
+        Output finish();
+
+    }
+
+}

core/src/main/java/com/taobao/arthas/core/command/basic1000/AuthCommand.java

+package com.taobao.arthas.core.command.basic1000;
+
+import javax.security.auth.Subject;
+import javax.security.auth.login.LoginException;
+
+import com.alibaba.arthas.deps.org.slf4j.Logger;
+import com.alibaba.arthas.deps.org.slf4j.LoggerFactory;
+import com.taobao.arthas.common.ArthasConstants;
+import com.taobao.arthas.core.command.Constants;
+import com.taobao.arthas.core.security.BasicPrincipal;
+import com.taobao.arthas.core.security.SecurityAuthenticator;
+import com.taobao.arthas.core.server.ArthasBootstrap;
+import com.taobao.arthas.core.shell.cli.Completion;
+import com.taobao.arthas.core.shell.cli.CompletionUtils;
+import com.taobao.arthas.core.shell.command.AnnotatedCommand;
+import com.taobao.arthas.core.shell.command.CommandProcess;
+import com.taobao.arthas.core.shell.session.Session;
+import com.taobao.middleware.cli.annotations.Argument;
+import com.taobao.middleware.cli.annotations.DefaultValue;
+import com.taobao.middleware.cli.annotations.Description;
+import com.taobao.middleware.cli.annotations.Name;
+import com.taobao.middleware.cli.annotations.Option;
+import com.taobao.middleware.cli.annotations.Summary;
+
+/**
+ * TODO 支持更多的鉴权方式。目前只支持 username/password的方式
+ * 
+ * @author hengyunabc 2021-03-03
+ *
+ */
+// @formatter:off
+@Name(ArthasConstants.AUTH)
+@Summary("Authenticates the current session")
+@Description(Constants.EXAMPLE +
+        "  auth" +
+        "  auth <password>\n" +
+        "  auth --username <username> <password>\n"
+        + Constants.WIKI + Constants.WIKI_HOME + ArthasConstants.AUTH)
+//@formatter:on
+public class AuthCommand extends AnnotatedCommand {
+    private static final Logger logger = LoggerFactory.getLogger(AuthCommand.class);
+
+    private String username;
+    private String password;
+    private SecurityAuthenticator authenticator = ArthasBootstrap.getInstance().getSecurityAuthenticator();
+
+    @Argument(argName = "password", index = 0, required = false)
+    @Description("password")
+    public void setPassword(String password) {
+        this.password = password;
+    }
+
+    @Option(shortName = "n", longName = "username")
+    @Description("username, default value 'arthas'")
+    @DefaultValue(ArthasConstants.DEFAULT_USERNAME)
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    @Override
+    public void process(CommandProcess process) {
+        int status = 0;
+        String message = "";
+        try {
+            Session session = process.session();
+            if (username == null) {
+                status = 1;
+                message = "username can not be empty!";
+                return;
+            }
+            if (password == null) { // 没有传入passowrd参数时，打印当前结果
+                boolean authenticated = session.get(ArthasConstants.SUBJECT_KEY) != null;
+                boolean needLogin = this.authenticator.needLogin();
+
+                message = "Authentication result: " + authenticated + ", Need authentication: " + needLogin;
+                if (needLogin && !authenticated) {
+                    status = 1;
+                }
+                return;
+            } else {
+                // 尝试进行鉴权
+                BasicPrincipal principal = new BasicPrincipal(username, password);
+                try {
+                    Subject subject = authenticator.login(principal);
+                    if (subject != null) {
+                        // 把subject 保存到 session里，后续其它命令则可以正常执行
+                        session.put(ArthasConstants.SUBJECT_KEY, subject);
+                        message = "Authentication result: " + true + ", username: " + username;
+                    } else {
+                        status = 1;
+                        message = "Authentication result: " + false + ", username: " + username;
+                    }
+                } catch (LoginException e) {
+                    logger.error("Authentication error, username: {}", username, e);
+                }
+            }
+        } finally {
+            process.end(status, message);
+        }
+    }
+
+    @Override
+    public void complete(Completion completion) {
+        if (!CompletionUtils.completeFilePath(completion)) {
+            super.complete(completion);
+        }
+    }
+
+}

core/src/main/java/com/taobao/arthas/core/command/basic1000/Base64Command.java

+package com.taobao.arthas.core.command.basic1000;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+import com.alibaba.arthas.deps.org.slf4j.Logger;
+import com.alibaba.arthas.deps.org.slf4j.LoggerFactory;
+import com.taobao.arthas.common.IOUtils;
+import com.taobao.arthas.core.command.Constants;
+import com.taobao.arthas.core.command.model.Base64Model;
+import com.taobao.arthas.core.shell.cli.Completion;
+import com.taobao.arthas.core.shell.cli.CompletionUtils;
+import com.taobao.arthas.core.shell.command.AnnotatedCommand;
+import com.taobao.arthas.core.shell.command.CommandProcess;
+import com.taobao.middleware.cli.annotations.Argument;
+import com.taobao.middleware.cli.annotations.Description;
+import com.taobao.middleware.cli.annotations.Name;
+import com.taobao.middleware.cli.annotations.Option;
+import com.taobao.middleware.cli.annotations.Summary;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.handler.codec.base64.Base64;
+import io.netty.util.CharsetUtil;
+
+/**
+ * 
+ * @author hengyunabc 2021-01-05
+ *
+ */
+@Name("base64")
+@Summary("Encode and decode using Base64 representation")
+@Description(Constants.EXAMPLE +
+        "  base64 /tmp/test.txt\n" +
+        "  base64 --input /tmp/test.txt --output /tmp/result.txt\n" +
+        "  base64 -d /tmp/result.txt\n"
+        + Constants.WIKI + Constants.WIKI_HOME + "base64")
+public class Base64Command extends AnnotatedCommand {
+    private static final Logger logger = LoggerFactory.getLogger(Base64Command.class);
+    private String file;
+    private int sizeLimit = 128 * 1024;
+    private static final int MAX_SIZE_LIMIT = 8 * 1024 * 1024;
+
+    private boolean decode;
+
+    private String input;
+    private String output;
+
+    @Argument(argName = "file", index = 0, required = false)
+    @Description("file")
+    public void setFiles(String file) {
+        this.file = file;
+    }
+
+    @Option(shortName = "d", longName = "decode", flag = true)
+    @Description("decodes input")
+    public void setDecode(boolean decode) {
+        this.decode = decode;
+    }
+
+    @Option(shortName = "i", longName = "input")
+    @Description("input file")
+    public void setInput(String input) {
+        this.input = input;
+    }
+
+    @Option(shortName = "o", longName = "output")
+    @Description("output file")
+    public void setOutput(String output) {
+        this.output = output;
+    }
+
+    @Option(shortName = "M", longName = "sizeLimit")
+    @Description("Upper size limit in bytes for the result (128 * 1024 by default, the maximum value is 8 * 1024 * 1024)")
+    public void setSizeLimit(Integer sizeLimit) {
+        this.sizeLimit = sizeLimit;
+    }
+
+    @Override
+    public void process(CommandProcess process) {
+        if (!verifyOptions(process)) {
+            return;
+        }
+
+        // 确认输入
+        if (file == null) {
+            if (this.input != null) {
+                file = input;
+            } else {
+                process.end(-1, ": No file, nor input");
+                return;
+            }
+        }
+
+        File f = new File(file);
+        if (!f.exists()) {
+            process.end(-1, file + ": No such file or directory");
+            return;
+        }
+        if (f.isDirectory()) {
+            process.end(-1, file + ": Is a directory");
+            return;
+        }
+
+        if (f.length() > sizeLimit) {
+            process.end(-1, file + ": Is too large, size: " + f.length());
+            return;
+        }
+
+        InputStream input = null;
+
+        try {
+            input = new FileInputStream(f);
+            byte[] bytes = IOUtils.getBytes(input);
+
+            ByteBuf convertResult = null;
+            if (this.decode) {
+                convertResult = Base64.decode(Unpooled.wrappedBuffer(bytes));
+            } else {
+                convertResult = Base64.encode(Unpooled.wrappedBuffer(bytes));
+            }
+
+            if (this.output != null) {
+                int readableBytes = convertResult.readableBytes();
+                OutputStream out = new FileOutputStream(this.output);
+                convertResult.readBytes(out, readableBytes);
+                process.appendResult(new Base64Model(null));
+            } else {
+                String base64Str = convertResult.toString(CharsetUtil.UTF_8);
+                process.appendResult(new Base64Model(base64Str));
+            }
+        } catch (IOException e) {
+            logger.error("read file error. name: " + file, e);
+            process.end(1, "read file error: " + e.getMessage());
+            return;
+        } finally {
+            IOUtils.close(input);
+        }
+
+        process.end();
+    }
+
+    private boolean verifyOptions(CommandProcess process) {
+        if(this.file == null && this.input == null) {
+            process.end(-1);
+            return false;
+        }
+
+        if (sizeLimit > MAX_SIZE_LIMIT) {
+            process.end(-1, "sizeLimit cannot be large than: " + MAX_SIZE_LIMIT);
+            return false;
+        }
+
+        // 目前不支持过滤，限制http请求执行的文件大小
+        int maxSizeLimitOfNonTty = 128 * 1024;
+        if (!process.session().isTty() && sizeLimit > maxSizeLimitOfNonTty) {
+            process.end(-1,
+                    "When executing in non-tty session, sizeLimit cannot be large than: " + maxSizeLimitOfNonTty);
+            return false;
+        }
+        return true;
+    }
+
+    @Override
+    public void complete(Completion completion) {
+        if (!CompletionUtils.completeFilePath(completion)) {
+            super.complete(completion);
+        }
+    }
+
+}

core/src/main/java/com/taobao/arthas/core/command/basic1000/CatCommand.java

+package com.taobao.arthas.core.command.basic1000;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.charset.Charset;
+import java.util.List;
+
+import com.taobao.arthas.core.command.model.CatModel;
+import com.alibaba.arthas.deps.org.slf4j.Logger;
+import com.alibaba.arthas.deps.org.slf4j.LoggerFactory;
+import com.taobao.arthas.core.shell.cli.Completion;
+import com.taobao.arthas.core.shell.cli.CompletionUtils;
+import com.taobao.arthas.core.shell.command.AnnotatedCommand;
+import com.taobao.arthas.core.shell.command.CommandProcess;
+import com.taobao.arthas.core.util.FileUtils;
+import com.taobao.middleware.cli.annotations.Argument;
+import com.taobao.middleware.cli.annotations.Description;
+import com.taobao.middleware.cli.annotations.Name;
+import com.taobao.middleware.cli.annotations.Option;
+import com.taobao.middleware.cli.annotations.Summary;
+
+@Name("cat")
+@Summary("Concatenate and print files")
+public class CatCommand extends AnnotatedCommand {
+    private static final Logger logger = LoggerFactory.getLogger(CatCommand.class);
+    private List<String> files;
+    private String encoding;
+    private Integer sizeLimit = 128 * 1024;
+    private int maxSizeLimit = 8 * 1024 * 1024;
+
+    @Argument(argName = "files", index = 0)
+    @Description("files")
+    public void setFiles(List<String> files) {
+        this.files = files;
+    }
+
+    @Option(longName = "encoding")
+    @Description("File encoding")
+    public void setEncoding(String encoding) {
+        this.encoding = encoding;
+    }
+
+    @Option(shortName = "M", longName = "sizeLimit")
+    @Description("Upper size limit in bytes for the result (128 * 1024 by default, the maximum value is 8 * 1024 * 1024)")
+    public void setSizeLimit(Integer sizeLimit) {
+        this.sizeLimit = sizeLimit;
+    }
+
+    @Override
+    public void process(CommandProcess process) {
+        if (!verifyOptions(process)) {
+            return;
+        }
+
+        for (String file : files) {
+            File f = new File(file);
+            if (!f.exists()) {
+                process.end(-1, "cat " + file + ": No such file or directory");
+                return;
+            }
+            if (f.isDirectory()) {
+                process.end(-1, "cat " + file + ": Is a directory");
+                return;
+            }
+        }
+
+        for (String file : files) {
+            File f = new File(file);
+            if (f.length() > sizeLimit) {
+                process.end(-1, "cat " + file + ": Is too large, size: " + f.length());
+                return;
+            }
+            try {
+                String fileToString = FileUtils.readFileToString(f,
+                        encoding == null ? Charset.defaultCharset() : Charset.forName(encoding));
+                process.appendResult(new CatModel(file, fileToString));
+            } catch (IOException e) {
+                logger.error("cat read file error. name: " + file, e);
+                process.end(1, "cat read file error: " + e.getMessage());
+                return;
+            }
+        }
+
+        process.end();
+    }
+
+    private boolean verifyOptions(CommandProcess process) {
+        if (sizeLimit > maxSizeLimit) {
+            process.end(-1, "sizeLimit cannot be large than: " + maxSizeLimit);
+            return false;
+        }
+
+        //目前不支持过滤，限制http请求执行的文件大小
+        int maxSizeLimitOfNonTty = 128 * 1024;
+        if (!process.session().isTty() && sizeLimit > maxSizeLimitOfNonTty) {
+            process.end(-1, "When executing in non-tty session, sizeLimit cannot be large than: " + maxSizeLimitOfNonTty);
+            return false;
+        }
+        return true;
+    }
+
+    @Override
+    public void complete(Completion completion) {
+        if (!CompletionUtils.completeFilePath(completion)) {
+            super.complete(completion);
+        }
+    }
+
+}

core/src/main/java/com/taobao/arthas/core/command/basic1000/ClsCommand.java

+package com.taobao.arthas.core.command.basic1000;
+
+import com.taobao.arthas.core.shell.command.AnnotatedCommand;
+import com.taobao.arthas.core.shell.command.CommandProcess;
+import com.taobao.middleware.cli.annotations.Name;
+import com.taobao.middleware.cli.annotations.Summary;
+import com.taobao.text.util.RenderUtil;
+
+@Name("cls")
+@Summary("Clear the screen")
+public class ClsCommand extends AnnotatedCommand {
+    @Override
+    public void process(CommandProcess process) {
+        if (!process.session().isTty()) {
+            process.end(-1, "Command 'cls' is only support tty session.");
+            return;
+        }
+        process.write(RenderUtil.cls()).write("\n");
+        process.end();
+    }
+}

core/src/main/java/com/taobao/arthas/core/command/basic1000/EchoCommand.java

+package com.taobao.arthas.core.command.basic1000;
+
+import com.taobao.arthas.core.command.Constants;
+import com.taobao.arthas.core.command.model.EchoModel;
+import com.taobao.arthas.core.shell.command.AnnotatedCommand;
+import com.taobao.arthas.core.shell.command.CommandProcess;
+import com.taobao.middleware.cli.annotations.Argument;
+import com.taobao.middleware.cli.annotations.Description;
+import com.taobao.middleware.cli.annotations.Name;
+import com.taobao.middleware.cli.annotations.Summary;
+
+/**
+ * 
+ * @author hengyunabc
+ *
+ */
+@Name("echo")
+@Summary("write arguments to the standard output")
+@Description("\nExamples:\n" +
+        "  echo 'abc'\n" +
+        Constants.WIKI + Constants.WIKI_HOME + "echo")
+public class EchoCommand extends AnnotatedCommand {
+    private String message;
+
+    @Argument(argName = "message", index = 0, required = false)
+    @Description("message")
+    public void setMessage(String message) {
+        this.message = message;
+    }
+
+    @Override
+    public void process(CommandProcess process) {
+        if (message != null) {
+            process.appendResult(new EchoModel(message));
+        }
+
+        process.end();
+    }
+
+}

core/src/main/java/com/taobao/arthas/core/command/basic1000/GrepCommand.java

+package com.taobao.arthas.core.command.basic1000;
+
+import com.taobao.arthas.core.command.Constants;
+import com.taobao.arthas.core.shell.command.AnnotatedCommand;
+import com.taobao.arthas.core.shell.command.CommandProcess;
+import com.taobao.middleware.cli.annotations.Argument;
+import com.taobao.middleware.cli.annotations.DefaultValue;
+import com.taobao.middleware.cli.annotations.Description;
+import com.taobao.middleware.cli.annotations.Name;
+import com.taobao.middleware.cli.annotations.Option;
+import com.taobao.middleware.cli.annotations.Summary;
+
+/**
+ * @see com.taobao.arthas.core.shell.command.internal.GrepHandler
+ */
+@Name("grep")
+@Summary("grep command for pipes." )
+@Description(Constants.EXAMPLE +
+        " sysprop | grep java \n" +
+        " sysprop | grep java -n\n" +
+        " sysenv | grep -v JAVA\n" +
+        " sysenv | grep -e \"(?i)(JAVA|sun)\" -m 3  -C 2\n" +
+        " sysenv | grep JAVA -A2 -B3\n" +
+        " thread | grep -m 10 -e  \"TIMED_WAITING|WAITING\"\n"
+        + Constants.WIKI + Constants.WIKI_HOME + "grep")
+public class GrepCommand extends AnnotatedCommand {
+    private String pattern;
+    private boolean ignoreCase;
+
+    /**
+     * select non-matching lines
+     */
+    private boolean invertMatch;
+
+    private boolean isRegEx = false;
+
+    /**
+     * print line number with output lines
+     */
+    private boolean showLineNumber = false;
+
+    private boolean trimEnd;
+
+    /**
+     * print NUM lines of leading context
+     */
+    private int beforeLines;
+
+    /**
+     * print NUM lines of trailing context
+     */
+    private int afterLines;
+
+    /**
+     * print NUM lines of output context
+     */
+    private int context;
+
+    /**
+     * stop after NUM selected lines
+     */
+    private int maxCount;
+
+    @Argument(index = 0, argName = "pattern", required = true)
+    @Description("Pattern")
+    public void setOptionName(String pattern) {
+        this.pattern = pattern;
+    }
+
+    @Option(shortName = "e", longName = "regex", flag = true)
+    @Description("Enable regular expression to match")
+    public void setRegEx(boolean regEx) {
+        isRegEx = regEx;
+    }
+
+    @Option(shortName = "i", longName = "ignore-case", flag = true)
+    @Description("Perform case insensitive matching.  By default, grep is case sensitive.")
+    public void setIgnoreCase(boolean ignoreCase) {
+        this.ignoreCase = ignoreCase;
+    }
+
+    @Option(shortName = "v", longName = "invert-match", flag = true)
+    @Description("Select non-matching lines")
+    public void setInvertMatch(boolean invertMatch) {
+        this.invertMatch = invertMatch;
+    }
+
+    @Option(shortName = "n", longName = "line-number", flag = true)
+    @Description("Print line number with output lines")
+    public void setShowLineNumber(boolean showLineNumber) {
+        this.showLineNumber = showLineNumber;
+    }
+
+    @Option(longName = "trim-end", flag = false)
+    @DefaultValue("true")
+    @Description("Remove whitespaces at the end of the line, default value true")
+    public void setTrimEnd(boolean trimEnd) {
+        this.trimEnd = trimEnd;
+    }
+
+    @Option(shortName = "B", longName = "before-context")
+    @Description("Print NUM lines of leading context)")
+    public void setBeforeLines(int beforeLines) {
+        this.beforeLines = beforeLines;
+    }
+
+    @Option(shortName = "A", longName = "after-context")
+    @Description("Print NUM lines of trailing context)")
+    public void setAfterLines(int afterLines) {
+        this.afterLines = afterLines;
+    }
+
+    @Option(shortName = "C", longName = "context")
+    @Description("Print NUM lines of output context)")
+    public void setContext(int context) {
+        this.context = context;
+    }
+
+    @Option(shortName = "m", longName = "max-count")
+    @Description("stop after NUM selected lines)")
+    public void setMaxCount(int maxCount) {
+        this.maxCount = maxCount;
+    }
+
+    public String getPattern() {
+        return pattern;
+    }
+
+    public void setPattern(String pattern) {
+        this.pattern = pattern;
+    }
+
+    public boolean isIgnoreCase() {
+        return ignoreCase;
+    }
+
+    public boolean isInvertMatch() {
+        return invertMatch;
+    }
+
+    public boolean isRegEx() {
+        return isRegEx;
+    }
+
+    public boolean isShowLineNumber() {
+        return showLineNumber;
+    }
+
+    public boolean isTrimEnd() {
+        return trimEnd;
+    }
+
+    public int getBeforeLines() {
+        return beforeLines;
+    }
+
+    public int getAfterLines() {
+        return afterLines;
+    }
+
+    public int getContext() {
+        return context;
+    }
+
+    public int getMaxCount() {
+        return maxCount;
+    }
+
+    @Override
+    public void process(CommandProcess process) {
+        process.end(-1, "The grep command only for pipes. See 'grep --help'\n");
+    }
+}

core/src/main/java/com/taobao/arthas/core/command/basic1000/HelpCommand.java

+package com.taobao.arthas.core.command.basic1000;
+
+import com.taobao.arthas.core.command.model.ArgumentVO;
+import com.taobao.arthas.core.command.model.CommandOptionVO;
+import com.taobao.arthas.core.command.model.CommandVO;
+import com.taobao.arthas.core.command.model.HelpModel;
+import com.taobao.arthas.core.shell.cli.Completion;
+import com.taobao.arthas.core.shell.cli.CompletionUtils;
+import com.taobao.arthas.core.shell.command.AnnotatedCommand;
+import com.taobao.arthas.core.shell.command.Command;
+import com.taobao.arthas.core.shell.command.CommandProcess;
+import com.taobao.arthas.core.shell.command.CommandResolver;
+import com.taobao.arthas.core.shell.session.Session;
+import com.taobao.arthas.core.util.usage.StyledUsageFormatter;
+import com.taobao.middleware.cli.CLI;
+import com.taobao.middleware.cli.Option;
+import com.taobao.middleware.cli.annotations.Argument;
+import com.taobao.middleware.cli.annotations.Description;
+import com.taobao.middleware.cli.annotations.Name;
+import com.taobao.middleware.cli.annotations.Summary;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * @author vlinux on 14/10/26.
+ */
+@Name("help")
+@Summary("Display Arthas Help")
+@Description("Examples:\n" + " help\n" + " help sc\n" + " help sm\n" + " help watch")
+public class HelpCommand extends AnnotatedCommand {
+
+    private String cmd;
+
+    @Argument(index = 0, argName = "cmd", required = false)
+    @Description("command name")
+    public void setCmd(String cmd) {
+        this.cmd = cmd;
+    }
+
+    @Override
+    public void process(CommandProcess process) {
+        List<Command> commands = allCommands(process.session());
+        Command targetCmd = findCommand(commands);
+        if (targetCmd == null) {
+            process.appendResult(createHelpModel(commands));
+        } else {
+            process.appendResult(createHelpDetailModel(targetCmd));
+        }
+        process.end();
+    }
+
+    public HelpModel createHelpDetailModel(Command targetCmd) {
+        return new HelpModel(createCommandVO(targetCmd, true));
+    }
+
+    private HelpModel createHelpModel(List<Command> commands) {
+        HelpModel helpModel = new HelpModel();
+        for (Command command : commands) {
+            if(command.cli() == null || command.cli().isHidden()){
+                continue;
+            }
+            helpModel.addCommandVO(createCommandVO(command, false));
+        }
+        return helpModel;
+    }
+
+    private CommandVO createCommandVO(Command command, boolean withDetail) {
+        CLI cli = command.cli();
+        CommandVO commandVO = new CommandVO();
+        commandVO.setName(command.name());
+        if (cli!=null){
+            commandVO.setSummary(cli.getSummary());
+            if (withDetail){
+                commandVO.setCli(cli);
+                StyledUsageFormatter usageFormatter = new StyledUsageFormatter(null);
+                String usageLine = usageFormatter.computeUsageLine(null, cli);
+                commandVO.setUsage(usageLine);
+                commandVO.setDescription(cli.getDescription());
+
+                //以线程安全的方式遍历options
+                List<Option> options = cli.getOptions();
+                for (int i = 0; i < options.size(); i++) {
+                    Option option = options.get(i);
+                    if (option.isHidden()){
+                        continue;
+                    }
+                    commandVO.addOption(createOptionVO(option));
+                }
+
+                //arguments
+                List<com.taobao.middleware.cli.Argument> arguments = cli.getArguments();
+                for (int i = 0; i < arguments.size(); i++) {
+                    com.taobao.middleware.cli.Argument argument = arguments.get(i);
+                    if (argument.isHidden()){
+                        continue;
+                    }
+                    commandVO.addArgument(createArgumentVO(argument));
+                }
+            }
+        }
+        return commandVO;
+    }
+
+    private ArgumentVO createArgumentVO(com.taobao.middleware.cli.Argument argument) {
+        ArgumentVO argumentVO = new ArgumentVO();
+        argumentVO.setArgName(argument.getArgName());
+        argumentVO.setMultiValued(argument.isMultiValued());
+        argumentVO.setRequired(argument.isRequired());
+        return argumentVO;
+    }
+
+    private CommandOptionVO createOptionVO(Option option) {
+        CommandOptionVO optionVO = new CommandOptionVO();
+        if (!isEmptyName(option.getLongName())) {
+            optionVO.setLongName(option.getLongName());
+        }
+        if (!isEmptyName(option.getShortName())) {
+            optionVO.setShortName(option.getShortName());
+        }
+        optionVO.setDescription(option.getDescription());
+        optionVO.setAcceptValue(option.acceptValue());
+        return optionVO;
+    }
+
+    private boolean isEmptyName(String name) {
+        return name == null || name.equals(Option.NO_NAME);
+    }
+
+    @Override
+    public void complete(Completion completion) {
+        List<Command> commands = allCommands(completion.session());
+
+        List<String> names = new ArrayList<String>(commands.size());
+        for (Command command : commands) {
+            CLI cli = command.cli();
+            if (cli == null || cli.isHidden()) {
+                continue;
+            }
+            names.add(command.name());
+        }
+        CompletionUtils.complete(completion, names);
+    }
+
+    private List<Command> allCommands(Session session) {
+        List<CommandResolver> commandResolvers = session.getCommandResolvers();
+        List<Command> commands = new ArrayList<Command>();
+        for (CommandResolver commandResolver : commandResolvers) {
+            commands.addAll(commandResolver.commands());
+        }
+        return commands;
+    }
+
+    private Command findCommand(List<Command> commands) {
+        for (Command command : commands) {
+            if (command.name().equals(cmd)) {
+                return command;
+            }
+        }
+        return null;
+    }
+}

core/src/main/java/com/taobao/arthas/core/command/basic1000/HistoryCommand.java

+package com.taobao.arthas.core.command.basic1000;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import com.taobao.arthas.core.command.Constants;
+import com.taobao.arthas.core.command.model.HistoryModel;
+import com.taobao.arthas.core.server.ArthasBootstrap;
+import com.taobao.arthas.core.shell.command.AnnotatedCommand;
+import com.taobao.arthas.core.shell.command.CommandProcess;
+import com.taobao.arthas.core.shell.history.HistoryManager;
+import com.taobao.arthas.core.shell.session.Session;
+import com.taobao.arthas.core.shell.term.impl.TermImpl;
+import com.taobao.middleware.cli.annotations.Argument;
+import com.taobao.middleware.cli.annotations.Description;
+import com.taobao.middleware.cli.annotations.Name;
+import com.taobao.middleware.cli.annotations.Option;
+import com.taobao.middleware.cli.annotations.Summary;
+
+import io.termd.core.readline.Readline;
+import io.termd.core.util.Helper;
+
+/**
+ *
+ * @author hengyunabc 2018-11-18
+ *
+ */
+@Name("history")
+@Summary("Display command history")
+@Description(Constants.EXAMPLE + "  history\n" + "  history -c\n" + "  history 5\n")
+public class HistoryCommand extends AnnotatedCommand {
+    boolean clear = false;
+    int n = -1;
+
+    @Option(shortName = "c", longName = "clear", flag = true , acceptValue = false)
+    @Description("clear history")
+    public void setClear(boolean clear) {
+        this.clear = clear;
+    }
+
+    @Argument(index = 0, argName = "n", required = false)
+    @Description("how many history commnads to display")
+    public void setNumber(int n) {
+        this.n = n;
+    }
+
+    @Override
+    public void process(CommandProcess process) {
+        Session session = process.session();
+        //TODO 修改term history实现方式，统一使用HistoryManager
+        Object termObject = session.get(Session.TTY);
+        if (termObject instanceof TermImpl) {
+            TermImpl term = (TermImpl) termObject;
+            Readline readline = term.getReadline();
+            List<int[]> history = readline.getHistory();
+
+            if (clear) {
+                readline.setHistory(new ArrayList<int[]>());
+            } else {
+                StringBuilder sb = new StringBuilder();
+
+                int size = history.size();
+                if (n < 0 || n > size) {
+                    n = size;
+                }
+
+                for (int i = 0; i < n; ++i) {
+                    int[] line = history.get(n - i - 1);
+                    sb.append(String.format("%5s  ", size - (n - i - 1)));
+                    Helper.appendCodePoints(line, sb);
+                    sb.append('\n');
+                }
+
+                process.write(sb.toString());
+            }
+        } else {
+            //http api
+            HistoryManager historyManager = ArthasBootstrap.getInstance().getHistoryManager();
+            if (clear) {
+                historyManager.clearHistory();
+            } else {
+                List<String> history = historyManager.getHistory();
+                process.appendResult(new HistoryModel(new ArrayList<String>(history)));
+            }
+        }
+
+        process.end();
+    }
+}

core/src/main/java/com/taobao/arthas/core/command/basic1000/KeymapCommand.java

+package com.taobao.arthas.core.command.basic1000;
+
+import com.alibaba.arthas.deps.org.slf4j.Logger;
+import com.alibaba.arthas.deps.org.slf4j.LoggerFactory;
+import com.taobao.arthas.common.IOUtils;
+import com.taobao.arthas.core.command.Constants;
+import com.taobao.arthas.core.shell.command.AnnotatedCommand;
+import com.taobao.arthas.core.shell.command.CommandProcess;
+import com.taobao.arthas.core.shell.term.impl.Helper;
+import com.taobao.middleware.cli.annotations.Description;
+import com.taobao.middleware.cli.annotations.Name;
+import com.taobao.middleware.cli.annotations.Summary;
+import com.taobao.text.Decoration;
+import com.taobao.text.ui.TableElement;
+import com.taobao.text.util.RenderUtil;
+
+import static com.taobao.text.ui.Element.label;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+
+/**
+ * A command to display all the keymap for the specified connection.
+ *
+ * @author ralf0131 2016-12-15 17:27.
+ * @author hengyunabc 2019-01-18
+ */
+@Name("keymap")
+@Summary("Display all the available keymap for the specified connection.")
+@Description(Constants.WIKI + Constants.WIKI_HOME + "keymap")
+public class KeymapCommand extends AnnotatedCommand {
+    private static final Logger logger = LoggerFactory.getLogger(KeymapCommand.class);
+
+    @Override
+    public void process(CommandProcess process) {
+        if (!process.session().isTty()) {
+            process.end(-1, "Command 'keymap' is only support tty session.");
+            return;
+        }
+
+        InputStream inputrc = Helper.loadInputRcFile();
+        try {
+            TableElement table = new TableElement(1, 1, 2).leftCellPadding(1).rightCellPadding(1);
+            table.row(true, label("Shortcut").style(Decoration.bold.bold()),
+                            label("Description").style(Decoration.bold.bold()),
+                            label("Name").style(Decoration.bold.bold()));
+
+            BufferedReader br = new BufferedReader(new InputStreamReader(inputrc));
+            String line;
+            while ((line = br.readLine()) != null) {
+                line = line.trim();
+                if (line.startsWith("#") || "".equals(line)) {
+                    continue;
+                }
+                String[] strings = line.split(":");
+                if (strings.length == 2) {
+                    table.row(strings[0], translate(strings[0]), strings[1]);
+                } else {
+                    table.row(line);
+                }
+
+            }
+            process.write(RenderUtil.render(table, process.width()));
+        } catch (IOException e) {
+            logger.error("read inputrc file error.", e);
+        } finally {
+            IOUtils.close(inputrc);
+            process.end();
+        }
+    }
+
+    private String translate(String key) {
+        if (key.length() == 6 && key.startsWith("\"\\C-") && key.endsWith("\"")) {
+            char ch = key.charAt(4);
+            if ((ch >= 'a' && ch <= 'z') || ch == '?') {
+                return "Ctrl + " + ch;
+            }
+        }
+
+        if (key.equals("\"\\e[D\"")) {
+            return "Left arrow";
+        } else if (key.equals("\"\\e[C\"")) {
+            return "Right arrow";
+        } else if (key.equals("\"\\e[B\"")) {
+            return "Down arrow";
+        } else if (key.equals("\"\\e[A\"")) {
+            return "Up arrow";
+        }
+
+        return key;
+    }
+}

core/src/main/java/com/taobao/arthas/core/command/basic1000/OptionsCommand.java

+package com.taobao.arthas.core.command.basic1000;
+
+import com.taobao.arthas.core.GlobalOptions;
+import com.taobao.arthas.core.Option;
+import com.taobao.arthas.core.command.Constants;
+import com.taobao.arthas.core.command.model.ChangeResultVO;
+import com.taobao.arthas.core.command.model.OptionVO;
+import com.taobao.arthas.core.command.model.OptionsModel;
+import com.taobao.arthas.core.shell.cli.CliToken;
+import com.taobao.arthas.core.shell.cli.Completion;
+import com.taobao.arthas.core.shell.cli.CompletionUtils;
+import com.taobao.arthas.core.shell.command.AnnotatedCommand;
+import com.taobao.arthas.core.shell.command.CommandProcess;
+import com.taobao.arthas.core.shell.command.ExitStatus;
+import com.taobao.arthas.core.util.CommandUtils;
+import com.taobao.arthas.core.util.StringUtils;
+import com.taobao.arthas.core.util.TokenUtils;
+import com.taobao.arthas.core.util.matcher.EqualsMatcher;
+import com.taobao.arthas.core.util.matcher.Matcher;
+import com.taobao.arthas.core.util.matcher.RegexMatcher;
+import com.taobao.arthas.core.util.reflect.FieldUtils;
+import com.taobao.middleware.cli.annotations.Argument;
+import com.taobao.middleware.cli.annotations.Description;
+import com.taobao.middleware.cli.annotations.Name;
+import com.taobao.middleware.cli.annotations.Summary;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.lang.reflect.Field;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
+import static com.taobao.arthas.core.util.ArthasCheckUtils.isIn;
+import static java.lang.String.format;
+
+/**
+ * 选项开关命令
+ *
+ * @author vlinux on 15/6/6.
+ */
+// @formatter:off
+@Name("options")
+@Summary("View and change various Arthas options")
+@Description(Constants.EXAMPLE +
+        "options       # list all options\n" +
+        "options json-format true\n" +
+        "options dump true\n" +
+        "options unsafe true\n" +
+        Constants.WIKI + Constants.WIKI_HOME + "options")
+//@formatter:on
+public class OptionsCommand extends AnnotatedCommand {
+
+    private static final Logger logger = LoggerFactory.getLogger(OptionsCommand.class);
+
+    private String optionName;
+    private String optionValue;
+
+    @Argument(index = 0, argName = "options-name", required = false)
+    @Description("Option name")
+    public void setOptionName(String optionName) {
+        this.optionName = optionName;
+    }
+
+    @Argument(index = 1, argName = "options-value", required = false)
+    @Description("Option value")
+    public void setOptionValue(String optionValue) {
+        this.optionValue = optionValue;
+    }
+
+    @Override
+    public void process(CommandProcess process) {
+        try {
+            ExitStatus status = null;
+            if (isShow()) {
+                status = processShow(process);
+            } else if (isShowName()) {
+                status = processShowName(process);
+            } else {
+                status = processChangeNameValue(process);
+            }
+
+            CommandUtils.end(process, status);
+        } catch (Throwable t) {
+            logger.error("processing error", t);
+            process.end(-1, "processing error");
+        }
+    }
+
+    /**
+     * complete first argument(options-name), other case use default complete
+     *
+     * @param completion the completion object
+     */
+    @Override
+    public void complete(Completion completion) {
+        int argumentIndex = CompletionUtils.detectArgumentIndex(completion);
+        List<CliToken> lineTokens = completion.lineTokens();
+        if (argumentIndex == 1) {
+            String laseToken = TokenUtils.getLast(lineTokens).value().trim();
+            //prefix match options-name
+            String pattern = "^" + laseToken + ".*";
+            Collection<String> optionNames = findOptionNames(new RegexMatcher(pattern));
+            CompletionUtils.complete(completion, optionNames);
+        } else {
+            super.complete(completion);
+        }
+    }
+
+    private ExitStatus processShow(CommandProcess process) throws IllegalAccessException {
+        Collection<Field> fields = findOptionFields(new RegexMatcher(".*"));
+        process.appendResult(new OptionsModel(convertToOptionVOs(fields)));
+        return ExitStatus.success();
+    }
+
+    private ExitStatus processShowName(CommandProcess process) throws IllegalAccessException {
+        Collection<Field> fields = findOptionFields(new EqualsMatcher<String>(optionName));
+        process.appendResult(new OptionsModel(convertToOptionVOs(fields)));
+        return ExitStatus.success();
+    }
+
+    private ExitStatus processChangeNameValue(CommandProcess process) throws IllegalAccessException {
+        Collection<Field> fields = findOptionFields(new EqualsMatcher<String>(optionName));
+
+        // name not exists
+        if (fields.isEmpty()) {
+            return ExitStatus.failure(-1, format("options[%s] not found.", optionName));
+        }
+
+        Field field = fields.iterator().next();
+        Option optionAnnotation = field.getAnnotation(Option.class);
+        Class<?> type = field.getType();
+        Object beforeValue = FieldUtils.readStaticField(field);
+        Object afterValue;
+
+        try {
+            // try to case string to type
+            if (isIn(type, int.class, Integer.class)) {
+                FieldUtils.writeStaticField(field, afterValue = Integer.valueOf(optionValue));
+            } else if (isIn(type, long.class, Long.class)) {
+                FieldUtils.writeStaticField(field, afterValue = Long.valueOf(optionValue));
+            } else if (isIn(type, boolean.class, Boolean.class)) {
+                FieldUtils.writeStaticField(field, afterValue = Boolean.valueOf(optionValue));
+            } else if (isIn(type, double.class, Double.class)) {
+                FieldUtils.writeStaticField(field, afterValue = Double.valueOf(optionValue));
+            } else if (isIn(type, float.class, Float.class)) {
+                FieldUtils.writeStaticField(field, afterValue = Float.valueOf(optionValue));
+            } else if (isIn(type, byte.class, Byte.class)) {
+                FieldUtils.writeStaticField(field, afterValue = Byte.valueOf(optionValue));
+            } else if (isIn(type, short.class, Short.class)) {
+                FieldUtils.writeStaticField(field, afterValue = Short.valueOf(optionValue));
+            } else if (isIn(type, short.class, String.class)) {
+                FieldUtils.writeStaticField(field, afterValue = optionValue);
+            } else {
+                return ExitStatus.failure(-1, format("Options[%s] type[%s] was unsupported.", optionName, type.getSimpleName()));
+            }
+
+        } catch (Throwable t) {
+            return ExitStatus.failure(-1, format("Cannot cast option value[%s] to type[%s].", optionValue, type.getSimpleName()));
+        }
+
+        ChangeResultVO changeResultVO = new ChangeResultVO(optionAnnotation.name(), beforeValue, afterValue);
+        process.appendResult(new OptionsModel(changeResultVO));
+        return ExitStatus.success();
+    }
+
+
+    /**
+     * 判断当前动作是否需要展示整个options
+     */
+    private boolean isShow() {
+        return StringUtils.isBlank(optionName) && StringUtils.isBlank(optionValue);
+    }
+
+
+    /**
+     * 判断当前动作是否需要展示某个Name的值
+     */
+    private boolean isShowName() {
+        return !StringUtils.isBlank(optionName) && StringUtils.isBlank(optionValue);
+    }
+
+    private Collection<Field> findOptionFields(Matcher<String> optionNameMatcher) {
+        final Collection<Field> matchFields = new ArrayList<Field>();
+        for (final Field optionField : FieldUtils.getAllFields(GlobalOptions.class)) {
+            if (isMatchOptionAnnotation(optionField, optionNameMatcher)) {
+                matchFields.add(optionField);
+            }
+        }
+        return matchFields;
+    }
+
+    private Collection<String> findOptionNames(Matcher<String> optionNameMatcher) {
+        final Collection<String> matchOptionNames = new ArrayList<String>();
+        for (final Field optionField : FieldUtils.getAllFields(GlobalOptions.class)) {
+            if (isMatchOptionAnnotation(optionField, optionNameMatcher)) {
+                final Option optionAnnotation = optionField.getAnnotation(Option.class);
+                matchOptionNames.add(optionAnnotation.name());
+            }
+        }
+        return matchOptionNames;
+    }
+
+    private boolean isMatchOptionAnnotation(Field optionField, Matcher<String> optionNameMatcher) {
+        if (!optionField.isAnnotationPresent(Option.class)) {
+            return false;
+        }
+        final Option optionAnnotation = optionField.getAnnotation(Option.class);
+        return optionAnnotation != null && optionNameMatcher.matching(optionAnnotation.name());
+    }
+
+    private List<OptionVO> convertToOptionVOs(Collection<Field> fields) throws IllegalAccessException {
+        List<OptionVO> list = new ArrayList<OptionVO>();
+        for (Field field : fields) {
+            list.add(convertToOptionVO(field));
+        }
+        return list;
+    }
+
+    private OptionVO convertToOptionVO(Field optionField) throws IllegalAccessException {
+        Option optionAnnotation = optionField.getAnnotation(Option.class);
+        OptionVO optionVO = new OptionVO();
+        optionVO.setLevel(optionAnnotation.level());
+        optionVO.setName(optionAnnotation.name());
+        optionVO.setSummary(optionAnnotation.summary());
+        optionVO.setDescription(optionAnnotation.description());
+        optionVO.setType(optionField.getType().getSimpleName());
+        optionVO.setValue(""+optionField.get(null));
+        return optionVO;
+    }
+
+}

core/src/main/java/com/taobao/arthas/core/command/basic1000/PwdCommand.java

+package com.taobao.arthas.core.command.basic1000;
+
+import java.io.File;
+
+import com.taobao.arthas.core.command.model.PwdModel;
+import com.taobao.arthas.core.shell.command.AnnotatedCommand;
+import com.taobao.arthas.core.shell.command.CommandProcess;
+import com.taobao.middleware.cli.annotations.Name;
+import com.taobao.middleware.cli.annotations.Summary;
+
+@Name("pwd")
+@Summary("Return working directory name")
+public class PwdCommand extends AnnotatedCommand {
+    @Override
+    public void process(CommandProcess process) {
+        String path = new File("").getAbsolutePath();
+        process.appendResult(new PwdModel(path));
+        process.end();
+    }
+}