异常处理是java语言非常重要的一个语法,本章主要实现如何处理抛出的异常。
在Java语言中,异常可以分为两类:Checked异常和Unchecked异常。Unchecked异常包括java.lang.RuntimeException、java.lang.Error以及它们的子类,提前异常都是Checked异常。所有异常都最终继承自java.lang.Throwable。如果一个方法有可能导致Checked异常抛出,则该方法要么需要捕获该异常并妥善处理,要么必须把该异常列在自己的throws子句中,否则无法通过编译。Unchanged异常没有这个限制。请注意,Java虚拟机规范并没有这个规定,这只是Java语言的语法规则。
异常可以由Java虚拟机抛出,也可以由Java代码抛出。当Java虚拟机在运行过程中遇到比较严重的问题时,会抛出java.lang.Error的某个子类,如StackOverflowError、OutOfMemoryError等。程序一般无法从这种异常里恢复,所以在代码中通常也不必关心这类异常。
一部分执行在执行过程中会导致Java虚拟机抛出java.lang.RuntimeException的某个子类,如NullPointerException、IndexOutOfBoundsException等。这类异常一般是代码中的bug导致的,需要格外注意。在代码中抛出和处理异常是由athrow指令和方法的异常处理表配合完成的。
itstack-demo-jvm-10 ├── pom.xml └── src └── main │ └── java │ └── org.itstack.demo.jvm │ ├── _native │ │ ├── java │ │ │ ├── _Class.java │ │ │ ├── _Double.java │ │ │ ├── _Float.java │ │ │ ├── _Object.java │ │ │ ├── _String.java │ │ │ ├── _System.java │ │ │ └── _Throwable.java │ │ └── sun │ ├── NativeMethod.java │ └── Registry.java │ ├── classfile │ │ ├── attributes │ │ ├── constantpool │ │ ├── ClassFile.java │ │ ├── ClassReader.java │ │ └── MemberInfo.java │ ├── classpath │ │ ├── impl │ │ │ ├── CompositeEntry.java │ │ │ ├── DirEntry.java │ │ │ ├── WildcardEntry.java │ │ │ └── ZipEntry.java │ │ ├── Classpath.java │ │ └── Entry.java │ ├── classpath │ │ ├── base │ │ │ ├── BytecodeReader.java │ │ │ ├── ClassInitLogic.java │ │ │ ├── Instruction.java │ │ │ ├── InstructionBranch.java │ │ │ ├── InstructionIndex8.java │ │ │ ├── InstructionIndex16.java │ │ │ ├── InstructionNoOperands.java │ │ │ └── MethodInvokeLogic.java │ │ ├── comparisons │ │ ├── constants │ │ ├── control │ │ ├── conversions │ │ ├── extended │ │ ├── loads │ │ ├── math │ │ ├── references │ │ │ ├── ANEW_ARRAY.java │ │ │ ├── ARRAY_LENGTH.java │ │ │ ├── ATHROW.java │ │ │ ├── CHECK_CAST.java │ │ │ ├── GET_FIELD.java │ │ │ ├── GET_STATIC.java │ │ │ ├── INSTANCE_OF.java │ │ │ ├── INVOKE_INTERFACE.java │ │ │ ├── INVOKE_SPECIAL.java │ │ │ ├── INVOKE_STATIC.java │ │ │ ├── INVOKE_VIRTUAL.java │ │ │ ├── MULTI_ANEW_ARRAY.java │ │ │ ├── NEW.java │ │ │ ├── NEW_ARRAY.java │ │ │ ├── PUT_FIELD.java │ │ │ └── PUT_STATIC.java │ │ ├── reserved │ │ │ └── INVOKE_NATIVE.java │ │ ├── stack │ │ ├── store │ │ │ └── xastore │ │ │ ├── AASTORE.java │ │ │ ├── BASTORE.java │ │ │ ├── CASTORE.java │ │ │ ├── DASTORE.java │ │ │ ├── FASTORE.java │ │ │ ├── IASTORE.java │ │ │ ├── LASTORE.java │ │ │ └── SASTORE.java │ │ └── Factory │ ├── rtda │ │ ├── heap │ │ │ ├── constantpool │ │ │ ├── methodarea │ │ │ │ ├── Class.java │ │ │ │ ├── ClassMember.java │ │ │ │ ├── ExceptionTable.java │ │ │ │ ├── Field.java │ │ │ │ ├── Method.java │ │ │ │ ├── MethodDescriptor.java │ │ │ │ ├── MethodDescriptorParser.java │ │ │ │ ├── MethodLookup.java │ │ │ │ ├── Object.java │ │ │ │ ├── Slots.java │ │ │ │ └── StringPool.java │ │ │ └── ClassLoader.java │ │ ├── Frame.java │ │ ├── JvmStack.java │ │ ├── LocalVars.java │ │ ├── OperandStack.java │ │ ├── Slot.java │ │ └── Thread.java │ ├── Cmd.java │ ├── Interpret.java │ └── Main.java └── test └── java └── org.itstack.demo.test └── HelloWorld.java 复制代码
如下为新增代码:
ClassReader.java (优化)
/** * http://www.itstack.org * create by fuzhengwei on 2019/5/12 * <p> * java虚拟机定义了u1、u2、u4三种数据类型来表示;1字节、2字节、4字节,无符号整数。 * 在如下实现中,用增位方式表示无符号类型: * u1、u2可以用int类型存储,因为int类型是4字节 * u4 需要用long类型存储,因为long类型是8字节 */ public class ClassReader { private byte[] data; public ClassReader(byte[] data) { this.data = data; } //u1 public int readUint8() { byte[] val = readByte(1); return byte2int(val); } //u2 public int readUint16() { byte[] val = readByte(2); return byte2int(val); } //u4 public long readUint32() { byte[] val = readByte(4); String str_hex = new BigInteger(1, val).toString(16); return Long.parseLong(str_hex, 16); } public int readUint32TInteger(){ byte[] val = readByte(4); return new BigInteger(1, val).intValue(); } public float readUint64TFloat() { byte[] val = readByte(8); return new BigInteger(1, val).floatValue(); } public long readUint64TLong() { byte[] val = readByte(8); return new BigInteger(1, val).longValue(); } public double readUint64TDouble() { byte[] val = readByte(8); return new BigInteger(1, val).doubleValue(); } public int[] readUint16s() { int n = this.readUint16(); int[] s = new int[n]; for (int i = 0; i < n; i++) { s[i] = this.readUint16(); } return s; } public byte[] readBytes(int n) { return readByte(n); } private byte[] readByte(int length) { byte[] copy = new byte[length]; System.arraycopy(data, 0, copy, 0, length); System.arraycopy(data, length, data, 0, data.length - length); return copy; } private int byte2int(byte[] val) { String str_hex = new BigInteger(1, val).toString(16); return Integer.parseInt(str_hex, 16); } } 复制代码
_Throwable.java
public class _Throwable { private StackTraceElement stackTraceElement; private final String jlThrowable = "java/lang/Throwable"; public _Throwable() { Registry.register(jlThrowable, "fillInStackTrace", "(I)Ljava/lang/Throwable;", new NativeMethod(this, "fillInStackTrace")); Registry.register(jlThrowable, "registerNatives", "()V", new NativeMethod(this, "registerNatives")); } public void registerNatives(Frame frame) { // do nothing } public String string() { return String.format("%s.%s(%s:%d)", this.stackTraceElement.className, this.stackTraceElement.methodName, this.stackTraceElement.fileName, this.stackTraceElement.lineNumber); } public void fillInStackTrace(Frame frame) { Object thiz = frame.localVars().getThis(); frame.operandStack().pushRef(thiz); _Throwable[] stes = createStackTraceElements(thiz, frame.thread()); thiz.setExtra(stes); } private _Throwable[] createStackTraceElements(Object tObj, Thread thread) { int skip = distanceToObject(tObj.clazz()) + 2; Frame[] frames = thread.getFrames(); _Throwable[] stes = new _Throwable[frames.length - skip]; int idx = 0; for (int i = skip; i < frames.length; i++) { stes[idx] = createStackTraceElement(frames[i]); } return stes; } private int distanceToObject(Class clazz) { int distance = 0; for (Class c = clazz.superClass(); c != null; c = c.superClass()) { distance++; } return distance; } private _Throwable createStackTraceElement(Frame frame) { Method method = frame.method(); Class clazz = method.clazz(); StackTraceElement stackTraceElement = new StackTraceElement(); stackTraceElement.fileName = clazz.sourceFile(); stackTraceElement.className = clazz.javaName(); stackTraceElement.methodName = method.name(); stackTraceElement.lineNumber = method.getLineNumber(frame.nextPC() - 1); _Throwable throwable = new _Throwable(); throwable.stackTraceElement = stackTraceElement; return throwable; } private class StackTraceElement { private String fileName; private String className; private String methodName; private int lineNumber; } } 复制代码
ATHROW.java
public class ATHROW extends InstructionNoOperands { @Override public void execute(Frame frame) { Object ex = frame.operandStack().popRef(); if (ex == null) { throw new NullPointerException(); } Thread thread = frame.thread(); if (!findAndGotoExceptionHandler(thread, ex)) { handleUncaughtException(thread, ex); } } private boolean findAndGotoExceptionHandler(Thread thread, Object ex) { do { Frame frame = thread.currentFrame(); int pc = frame.nextPC() - 1; int handlerPc = frame.method().findExceptionHandler(ex.clazz(), pc); if (handlerPc > 0) { OperandStack stack = frame.operandStack(); stack.clear(); stack.pushRef(ex); frame.setNextPC(handlerPc); return true; } thread.popFrame(); } while (!thread.isStackEmpty()); return false; } private void handleUncaughtException(Thread thread, Object ex) { thread.clearStack(); Object jMsg = ex.getRefVar("detailMessage", "Ljava/lang/String;"); String msg = StringPool.goString(jMsg); System.out.println(ex.clazz().javaName() + ":" + msg); java.lang.Object extra = ex.extra(); _Throwable[] throwables = (_Throwable[]) extra; for (_Throwable t : throwables) { System.out.println(t.string()); } } } 复制代码
ExceptionTable.java
public class ExceptionTable { private ExceptionHandler[] exceptionTable; public ExceptionTable(CodeAttribute.ExceptionTableEntry[] entries, RunTimeConstantPool runTimeConstantPool) { this.exceptionTable = new ExceptionHandler[entries.length]; int i = 0; for (CodeAttribute.ExceptionTableEntry entry : entries) { ExceptionHandler handler = new ExceptionHandler( entry.startPC(), entry.endPC(), entry.handlerPC(), getCatchType(entry.catchType(), runTimeConstantPool) ); this.exceptionTable[i++] = handler; } } public ClassRef getCatchType(int idx, RunTimeConstantPool runTimeConstantPool) { if (idx == 0) return null; return (ClassRef) runTimeConstantPool.getConstants(idx); } public ExceptionHandler findExceptionHandler(Class exClass, int pc) { for (ExceptionHandler handler : exceptionTable) { if (pc >= handler.startPC && pc < handler.endPC) { if (null == handler.catchType) { return handler; } Class catchClass = handler.catchType.resolvedClass(); if (catchClass == exClass || catchClass.isSubClassOf(exClass)) { return handler; } } } return null; } class ExceptionHandler { int startPC; int endPC; int handlerPC; ClassRef catchType; ExceptionHandler(int startPC, int endPC, int handlerPC, ClassRef catchType) { this.startPC = startPC; this.endPC = endPC; this.handlerPC = handlerPC; this.catchType = catchType; } } } 复制代码
Method.java
public class Method extends ClassMember { public int maxStack; public int maxLocals; public byte[] code; private ExceptionTable exceptionTable; private LineNumberTableAttribute lineNumberTable; private int argSlotCount; Method[] newMethods(Class clazz, MemberInfo[] cfMethods) { Method[] methods = new Method[cfMethods.length]; for (int i = 0; i < cfMethods.length; i++) { methods[i] = newMethod(clazz, cfMethods[i]); } return methods; } private Method newMethod(Class clazz, MemberInfo cfMethod) { Method method = new Method(); method.clazz = clazz; method.copyMemberInfo(cfMethod); method.copyAttributes(cfMethod); MethodDescriptor md = MethodDescriptorParser.parseMethodDescriptorParser(method.descriptor); method.calcArgSlotCount(md.parameterTypes); if (method.isNative()) { method.injectCodeAttribute(md.returnType); } return method; } private void injectCodeAttribute(String returnType) { this.maxStack = 4; //todo this.maxLocals = this.argSlotCount; switch (returnType.getBytes()[0]) { case 'V': this.code = new byte[]{(byte) 0xfe, (byte) 0xb1}; break; case 'L': case '[': this.code = new byte[]{(byte) 0xfe, (byte) 0xb0}; break; case 'D': this.code = new byte[]{(byte) 0xfe, (byte) 0xaf}; break; case 'F': this.code = new byte[]{(byte) 0xfe, (byte) 0xae}; break; case 'J': this.code = new byte[]{(byte) 0xfe, (byte) 0xad}; break; default: this.code = new byte[]{(byte) 0xfe, (byte) 0xac}; break; } } private void copyAttributes(MemberInfo cfMethod) { CodeAttribute codeAttr = cfMethod.codeAttribute(); if (null != codeAttr) { this.maxStack = codeAttr.maxStack(); this.maxLocals = codeAttr.maxLocals(); this.code = codeAttr.data(); this.lineNumberTable = codeAttr.lineNumberTableAttribute(); this.exceptionTable = new ExceptionTable(codeAttr.exceptionTable(), this.clazz.constantPool()); } } private void calcArgSlotCount(List<String> parameterTypes) { for (String paramType : parameterTypes) { this.argSlotCount++; if ("J".equals(paramType) || "D".equals(paramType)) { this.argSlotCount++; } } if (!this.isStatic()) { this.argSlotCount++; } } public boolean isSynchronized() { return 0 != (this.accessFlags & AccessFlags.ACC_SYNCHRONIZED); } public boolean isBridge() { return 0 != (this.accessFlags & AccessFlags.ACC_BRIDGE); } public boolean isVarargs() { return 0 != (this.accessFlags & AccessFlags.ACC_VARARGS); } public boolean isNative() { return 0 != (this.accessFlags & AccessFlags.ACC_NATIVE); } public boolean isAbstract() { return 0 != (this.accessFlags & AccessFlags.ACC_ABSTRACT); } public boolean isStrict() { return 0 != (this.accessFlags & AccessFlags.ACC_STRICT); } public int maxStack() { return this.maxStack; } public int maxLocals() { return this.maxLocals; } public byte[] code() { return this.code; } public int argSlotCount() { return this.argSlotCount; } public int findExceptionHandler(Class exClass, int pc) { ExceptionTable.ExceptionHandler handler = this.exceptionTable.findExceptionHandler(exClass, pc); if (handler != null) { return handler.handlerPC; } return -1; } public int getLineNumber(int pc) { if (this.isNative()) return -2; if (this.lineNumberTable == null) return -1; return this.lineNumberTable.getLineNumber(pc); } } 复制代码
HelloWorld.java
public class HelloWorld { public static void main(String[] args) { throw new RuntimeException("自定义异常"); } } 复制代码
-Xjre "C:/Program Files/Java/jdk1.8.0_161/jre" E:/itstack/git/istack-demo/itstack-demo-jvm/itstack-demo-jvm-10/target/test-classes/org/itstack/demo/test/HelloWorld -verbose
public class org.itstack.demo.test.HelloWorld { public org.itstack.demo.test.HelloWorld(); Code: 0: aload_0 1: invokespecial #1 // Method java/lang/Object."<init>":()V 4: return public static void main(java.lang.String[]); Code: 0: new #2 // class java/lang/RuntimeException 3: dup 4: ldc #3 // String 自定义异常 6: invokespecial #4 // Method java/lang/RuntimeException."<init>":(Ljava/lang/String;)V 9: athrow } 复制代码
org/itstack/demo/test/HelloWorld.main() 寄存器(指令):0xbb -> NEW java/lang/Object.<clinit>() 寄存器(指令):0xb8 -> INVOKE_STATIC java/lang/Object.registerNatives() 寄存器(指令):0xfe -> INVOKE_NATIVE java/lang/Object.registerNatives() 寄存器(指令):0xb1 -> RETURN java/lang/Object.<clinit>() 寄存器(指令):0xb1 -> RETURN java/lang/Throwable.<clinit>() 寄存器(指令):0x12 -> LDC java/lang/Throwable.<clinit>() 寄存器(指令):0xb6 -> INVOKE_VIRTUAL java/lang/Class.desiredAssertionStatus() 寄存器(指令):0x2a -> ALOAD_0 java/lang/Class.desiredAssertionStatus() 寄存器(指令):0xb6 -> INVOKE_VIRTUAL java/lang/Class.getClassLoader() 寄存器(指令):0x2a -> ALOAD_0 java/lang/Class.getClassLoader() 寄存器(指令):0xb6 -> INVOKE_VIRTUAL java/lang/Class.getClassLoader0() 寄存器(指令):0x2a -> ALOAD_0 java/lang/Class.getClassLoader0() 寄存器(指令):0xb4 -> GET_FIELD java/lang/Class.getClassLoader0() 寄存器(指令):0xb0 -> ARETURN java/lang/Class.getClassLoader() 寄存器(指令):0x4c -> ASTORE_1 java/lang/Class.getClassLoader() 寄存器(指令):0x2b -> ALOAD_1 java/lang/Class.getClassLoader() 寄存器(指令):0xc7 -> IFNONNULL java/lang/Class.getClassLoader() 寄存器(指令):0x01 -> ACONST_NULL java/lang/Class.getClassLoader() 寄存器(指令):0xb0 -> ARETURN java/lang/Class.desiredAssertionStatus() 寄存器(指令):0x4c -> ASTORE_1 java/lang/Class.desiredAssertionStatus() 寄存器(指令):0x2b -> ALOAD_1 java/lang/Class.desiredAssertionStatus() 寄存器(指令):0xc7 -> IFNONNULL java/lang/Class.desiredAssertionStatus() 寄存器(指令):0x2a -> ALOAD_0 java/lang/Class.desiredAssertionStatus() 寄存器(指令):0xb8 -> INVOKE_STATIC java/lang/Class.<clinit>() 寄存器(指令):0xb8 -> INVOKE_STATIC java/lang/Class.registerNatives() 寄存器(指令):0xfe -> INVOKE_NATIVE java/lang/Class.registerNatives() 寄存器(指令):0xb1 -> RETURN java/lang/Class.<clinit>() 寄存器(指令):0x04 -> ICONST_1 java/lang/Class.<clinit>() 寄存器(指令):0xb3 -> PUT_STATIC java/lang/Class.<clinit>() 寄存器(指令):0x03 -> ICONST_0 java/lang/Class.<clinit>() 寄存器(指令):0xbd -> ANEW_ARRAY java/lang/Class.<clinit>() 寄存器(指令):0xb3 -> PUT_STATIC java/lang/Class.<clinit>() 寄存器(指令):0x03 -> ICONST_0 java/lang/Class.<clinit>() 寄存器(指令):0xb3 -> PUT_STATIC java/lang/Class.<clinit>() 寄存器(指令):0xb1 -> RETURN java/lang/Class.desiredAssertionStatus() 寄存器(指令):0xb8 -> INVOKE_STATIC java/lang/Class.desiredAssertionStatus0() 寄存器(指令):0xfe -> INVOKE_NATIVE java/lang/Class.desiredAssertionStatus0() 寄存器(指令):0xac -> IRETURN java/lang/Class.desiredAssertionStatus() 寄存器(指令):0xac -> IRETURN java/lang/Throwable.<clinit>() 寄存器(指令):0x9a -> IFNE java/lang/Throwable.<clinit>() 寄存器(指令):0x04 -> ICONST_1 java/lang/Throwable.<clinit>() 寄存器(指令):0xa7 -> GOTO java/lang/Throwable.<clinit>() 寄存器(指令):0xb3 -> PUT_STATIC java/lang/Throwable.<clinit>() 寄存器(指令):0x03 -> ICONST_0 java/lang/Throwable.<clinit>() 寄存器(指令):0xbd -> ANEW_ARRAY java/lang/Throwable.<clinit>() 寄存器(指令):0xb3 -> PUT_STATIC java/lang/Throwable.<clinit>() 寄存器(指令):0xbb -> NEW java/lang/Object.<clinit>() 寄存器(指令):0xb8 -> INVOKE_STATIC java/lang/Object.registerNatives() 寄存器(指令):0xfe -> INVOKE_NATIVE java/lang/Object.registerNatives() 寄存器(指令):0xb1 -> RETURN java/lang/Object.<clinit>() 寄存器(指令):0xb1 -> RETURN java/lang/Object.<clinit>() 寄存器(指令):0xb8 -> INVOKE_STATIC java/lang/Object.registerNatives() 寄存器(指令):0xfe -> INVOKE_NATIVE java/lang/Object.registerNatives() 寄存器(指令):0xb1 -> RETURN java/lang/Object.<clinit>() 寄存器(指令):0xb1 -> RETURN java/util/ArrayList.<clinit>() 寄存器(指令):0x03 -> ICONST_0 java/util/ArrayList.<clinit>() 寄存器(指令):0xbd -> ANEW_ARRAY java/util/ArrayList.<clinit>() 寄存器(指令):0xb3 -> PUT_STATIC java/util/ArrayList.<clinit>() 寄存器(指令):0x03 -> ICONST_0 java/util/ArrayList.<clinit>() 寄存器(指令):0xbd -> ANEW_ARRAY java/util/ArrayList.<clinit>() 寄存器(指令):0xb3 -> PUT_STATIC java/util/ArrayList.<clinit>() 寄存器(指令):0xb1 -> RETURN java/lang/Throwable.<clinit>() 寄存器(指令):0xbb -> NEW java/lang/Throwable.<clinit>() 寄存器(指令):0x59 -> DUP java/lang/Throwable.<clinit>() 寄存器(指令):0x03 -> ICONST_0 java/lang/Throwable.<clinit>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/util/ArrayList.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/ArrayList.<init>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/util/AbstractList.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/AbstractList.<init>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/util/AbstractCollection.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/AbstractCollection.<init>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/lang/Object.<init>() 寄存器(指令):0xb1 -> RETURN java/util/AbstractCollection.<init>() 寄存器(指令):0xb1 -> RETURN java/util/AbstractList.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/AbstractList.<init>() 寄存器(指令):0x03 -> ICONST_0 java/util/AbstractList.<init>() 寄存器(指令):0xb5 -> PUT_FIELD java/util/AbstractList.<init>() 寄存器(指令):0xb1 -> RETURN java/util/ArrayList.<init>() 寄存器(指令):0x1b -> ILOAD_1 java/util/ArrayList.<init>() 寄存器(指令):0x9e -> IFLE java/util/ArrayList.<init>() 寄存器(指令):0x1b -> ILOAD_1 java/util/ArrayList.<init>() 寄存器(指令):0x9a -> IFNE java/util/ArrayList.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/ArrayList.<init>() 寄存器(指令):0xb2 -> GET_STATIC java/util/ArrayList.<init>() 寄存器(指令):0xb5 -> PUT_FIELD java/util/ArrayList.<init>() 寄存器(指令):0xa7 -> GOTO java/util/ArrayList.<init>() 寄存器(指令):0xb1 -> RETURN java/lang/Throwable.<clinit>() 寄存器(指令):0xb8 -> INVOKE_STATIC java/util/Collections.<clinit>() 寄存器(指令):0xbb -> NEW java/lang/Object.<clinit>() 寄存器(指令):0xb8 -> INVOKE_STATIC java/lang/Object.registerNatives() 寄存器(指令):0xfe -> INVOKE_NATIVE java/lang/Object.registerNatives() 寄存器(指令):0xb1 -> RETURN java/lang/Object.<clinit>() 寄存器(指令):0xb1 -> RETURN java/lang/Object.<clinit>() 寄存器(指令):0xb8 -> INVOKE_STATIC java/lang/Object.registerNatives() 寄存器(指令):0xfe -> INVOKE_NATIVE java/lang/Object.registerNatives() 寄存器(指令):0xb1 -> RETURN java/lang/Object.<clinit>() 寄存器(指令):0xb1 -> RETURN java/util/Collections.<clinit>() 寄存器(指令):0xbb -> NEW java/util/Collections.<clinit>() 寄存器(指令):0x59 -> DUP java/util/Collections.<clinit>() 寄存器(指令):0x01 -> ACONST_NULL java/util/Collections.<clinit>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/util/Collections$EmptySet.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/Collections$EmptySet.<init>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/util/Collections$EmptySet.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/Collections$EmptySet.<init>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/util/AbstractSet.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/AbstractSet.<init>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/util/AbstractCollection.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/AbstractCollection.<init>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/lang/Object.<init>() 寄存器(指令):0xb1 -> RETURN java/util/AbstractCollection.<init>() 寄存器(指令):0xb1 -> RETURN java/util/AbstractSet.<init>() 寄存器(指令):0xb1 -> RETURN java/util/Collections$EmptySet.<init>() 寄存器(指令):0xb1 -> RETURN java/util/Collections$EmptySet.<init>() 寄存器(指令):0xb1 -> RETURN java/util/Collections.<clinit>() 寄存器(指令):0xb3 -> PUT_STATIC java/util/Collections.<clinit>() 寄存器(指令):0xbb -> NEW java/lang/Object.<clinit>() 寄存器(指令):0xb8 -> INVOKE_STATIC java/lang/Object.registerNatives() 寄存器(指令):0xfe -> INVOKE_NATIVE java/lang/Object.registerNatives() 寄存器(指令):0xb1 -> RETURN java/lang/Object.<clinit>() 寄存器(指令):0xb1 -> RETURN java/util/Collections.<clinit>() 寄存器(指令):0xbb -> NEW java/util/Collections.<clinit>() 寄存器(指令):0x59 -> DUP java/util/Collections.<clinit>() 寄存器(指令):0x01 -> ACONST_NULL java/util/Collections.<clinit>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/util/Collections$EmptyList.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/Collections$EmptyList.<init>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/util/Collections$EmptyList.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/Collections$EmptyList.<init>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/util/AbstractList.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/AbstractList.<init>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/util/AbstractCollection.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/AbstractCollection.<init>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/lang/Object.<init>() 寄存器(指令):0xb1 -> RETURN java/util/AbstractCollection.<init>() 寄存器(指令):0xb1 -> RETURN java/util/AbstractList.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/AbstractList.<init>() 寄存器(指令):0x03 -> ICONST_0 java/util/AbstractList.<init>() 寄存器(指令):0xb5 -> PUT_FIELD java/util/AbstractList.<init>() 寄存器(指令):0xb1 -> RETURN java/util/Collections$EmptyList.<init>() 寄存器(指令):0xb1 -> RETURN java/util/Collections$EmptyList.<init>() 寄存器(指令):0xb1 -> RETURN java/util/Collections.<clinit>() 寄存器(指令):0xb3 -> PUT_STATIC java/util/Collections.<clinit>() 寄存器(指令):0xbb -> NEW java/lang/Object.<clinit>() 寄存器(指令):0xb8 -> INVOKE_STATIC java/lang/Object.registerNatives() 寄存器(指令):0xfe -> INVOKE_NATIVE java/lang/Object.registerNatives() 寄存器(指令):0xb1 -> RETURN java/lang/Object.<clinit>() 寄存器(指令):0xb1 -> RETURN java/lang/Object.<clinit>() 寄存器(指令):0xb8 -> INVOKE_STATIC java/lang/Object.registerNatives() 寄存器(指令):0xfe -> INVOKE_NATIVE java/lang/Object.registerNatives() 寄存器(指令):0xb1 -> RETURN java/lang/Object.<clinit>() 寄存器(指令):0xb1 -> RETURN java/util/Collections.<clinit>() 寄存器(指令):0xbb -> NEW java/util/Collections.<clinit>() 寄存器(指令):0x59 -> DUP java/util/Collections.<clinit>() 寄存器(指令):0x01 -> ACONST_NULL java/util/Collections.<clinit>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/util/Collections$EmptyMap.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/Collections$EmptyMap.<init>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/util/Collections$EmptyMap.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/Collections$EmptyMap.<init>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/util/AbstractMap.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/AbstractMap.<init>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/lang/Object.<init>() 寄存器(指令):0xb1 -> RETURN java/util/AbstractMap.<init>() 寄存器(指令):0xb1 -> RETURN java/util/Collections$EmptyMap.<init>() 寄存器(指令):0xb1 -> RETURN java/util/Collections$EmptyMap.<init>() 寄存器(指令):0xb1 -> RETURN java/util/Collections.<clinit>() 寄存器(指令):0xb3 -> PUT_STATIC java/util/Collections.<clinit>() 寄存器(指令):0xb1 -> RETURN java/lang/Throwable.<clinit>() 寄存器(指令):0xb8 -> INVOKE_STATIC java/util/Collections.unmodifiableList() 寄存器(指令):0x2a -> ALOAD_0 java/util/Collections.unmodifiableList() 寄存器(指令):0xc1 -> INSTANCE_OF java/util/Collections.unmodifiableList() 寄存器(指令):0x99 -> IFEQ java/util/Collections.unmodifiableList() 寄存器(指令):0xbb -> NEW java/lang/Object.<clinit>() 寄存器(指令):0xb8 -> INVOKE_STATIC java/lang/Object.registerNatives() 寄存器(指令):0xfe -> INVOKE_NATIVE java/lang/Object.registerNatives() 寄存器(指令):0xb1 -> RETURN java/lang/Object.<clinit>() 寄存器(指令):0xb1 -> RETURN java/lang/Object.<clinit>() 寄存器(指令):0xb8 -> INVOKE_STATIC java/lang/Object.registerNatives() 寄存器(指令):0xfe -> INVOKE_NATIVE java/lang/Object.registerNatives() 寄存器(指令):0xb1 -> RETURN java/lang/Object.<clinit>() 寄存器(指令):0xb1 -> RETURN java/util/Collections.unmodifiableList() 寄存器(指令):0xbb -> NEW java/util/Collections.unmodifiableList() 寄存器(指令):0x59 -> DUP java/util/Collections.unmodifiableList() 寄存器(指令):0x2a -> ALOAD_0 java/util/Collections.unmodifiableList() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/util/Collections$UnmodifiableList.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/Collections$UnmodifiableList.<init>() 寄存器(指令):0x2b -> ALOAD_1 java/util/Collections$UnmodifiableList.<init>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/util/Collections$UnmodifiableCollection.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/Collections$UnmodifiableCollection.<init>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/lang/Object.<init>() 寄存器(指令):0xb1 -> RETURN java/util/Collections$UnmodifiableCollection.<init>() 寄存器(指令):0x2b -> ALOAD_1 java/util/Collections$UnmodifiableCollection.<init>() 寄存器(指令):0xc7 -> IFNONNULL java/util/Collections$UnmodifiableCollection.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/Collections$UnmodifiableCollection.<init>() 寄存器(指令):0x2b -> ALOAD_1 java/util/Collections$UnmodifiableCollection.<init>() 寄存器(指令):0xb5 -> PUT_FIELD java/util/Collections$UnmodifiableCollection.<init>() 寄存器(指令):0xb1 -> RETURN java/util/Collections$UnmodifiableList.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/Collections$UnmodifiableList.<init>() 寄存器(指令):0x2b -> ALOAD_1 java/util/Collections$UnmodifiableList.<init>() 寄存器(指令):0xb5 -> PUT_FIELD java/util/Collections$UnmodifiableList.<init>() 寄存器(指令):0xb1 -> RETURN java/util/Collections.unmodifiableList() 寄存器(指令):0xb0 -> ARETURN java/lang/Throwable.<clinit>() 寄存器(指令):0xb3 -> PUT_STATIC java/lang/Throwable.<clinit>() 寄存器(指令):0x03 -> ICONST_0 java/lang/Throwable.<clinit>() 寄存器(指令):0xbd -> ANEW_ARRAY java/lang/Throwable.<clinit>() 寄存器(指令):0xb3 -> PUT_STATIC java/lang/Throwable.<clinit>() 寄存器(指令):0xb1 -> RETURN java/lang/Throwable.<clinit>() 寄存器(指令):0x12 -> LDC java/lang/Throwable.<clinit>() 寄存器(指令):0xb6 -> INVOKE_VIRTUAL java/lang/Class.desiredAssertionStatus() 寄存器(指令):0x2a -> ALOAD_0 java/lang/Class.desiredAssertionStatus() 寄存器(指令):0xb6 -> INVOKE_VIRTUAL java/lang/Class.getClassLoader() 寄存器(指令):0x2a -> ALOAD_0 java/lang/Class.getClassLoader() 寄存器(指令):0xb6 -> INVOKE_VIRTUAL java/lang/Class.getClassLoader0() 寄存器(指令):0x2a -> ALOAD_0 java/lang/Class.getClassLoader0() 寄存器(指令):0xb4 -> GET_FIELD java/lang/Class.getClassLoader0() 寄存器(指令):0xb0 -> ARETURN java/lang/Class.getClassLoader() 寄存器(指令):0x4c -> ASTORE_1 java/lang/Class.getClassLoader() 寄存器(指令):0x2b -> ALOAD_1 java/lang/Class.getClassLoader() 寄存器(指令):0xc7 -> IFNONNULL java/lang/Class.getClassLoader() 寄存器(指令):0x01 -> ACONST_NULL java/lang/Class.getClassLoader() 寄存器(指令):0xb0 -> ARETURN java/lang/Class.desiredAssertionStatus() 寄存器(指令):0x4c -> ASTORE_1 java/lang/Class.desiredAssertionStatus() 寄存器(指令):0x2b -> ALOAD_1 java/lang/Class.desiredAssertionStatus() 寄存器(指令):0xc7 -> IFNONNULL java/lang/Class.desiredAssertionStatus() 寄存器(指令):0x2a -> ALOAD_0 java/lang/Class.desiredAssertionStatus() 寄存器(指令):0xb8 -> INVOKE_STATIC java/lang/Class.desiredAssertionStatus0() 寄存器(指令):0xfe -> INVOKE_NATIVE java/lang/Class.desiredAssertionStatus0() 寄存器(指令):0xac -> IRETURN java/lang/Class.desiredAssertionStatus() 寄存器(指令):0xac -> IRETURN java/lang/Throwable.<clinit>() 寄存器(指令):0x9a -> IFNE java/lang/Throwable.<clinit>() 寄存器(指令):0x04 -> ICONST_1 java/lang/Throwable.<clinit>() 寄存器(指令):0xa7 -> GOTO java/lang/Throwable.<clinit>() 寄存器(指令):0xb3 -> PUT_STATIC java/lang/Throwable.<clinit>() 寄存器(指令):0x03 -> ICONST_0 java/lang/Throwable.<clinit>() 寄存器(指令):0xbd -> ANEW_ARRAY java/lang/Throwable.<clinit>() 寄存器(指令):0xb3 -> PUT_STATIC java/lang/Throwable.<clinit>() 寄存器(指令):0xbb -> NEW java/lang/Throwable.<clinit>() 寄存器(指令):0x59 -> DUP java/lang/Throwable.<clinit>() 寄存器(指令):0x03 -> ICONST_0 java/lang/Throwable.<clinit>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/util/ArrayList.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/ArrayList.<init>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/util/AbstractList.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/AbstractList.<init>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/util/AbstractCollection.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/AbstractCollection.<init>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/lang/Object.<init>() 寄存器(指令):0xb1 -> RETURN java/util/AbstractCollection.<init>() 寄存器(指令):0xb1 -> RETURN java/util/AbstractList.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/AbstractList.<init>() 寄存器(指令):0x03 -> ICONST_0 java/util/AbstractList.<init>() 寄存器(指令):0xb5 -> PUT_FIELD java/util/AbstractList.<init>() 寄存器(指令):0xb1 -> RETURN java/util/ArrayList.<init>() 寄存器(指令):0x1b -> ILOAD_1 java/util/ArrayList.<init>() 寄存器(指令):0x9e -> IFLE java/util/ArrayList.<init>() 寄存器(指令):0x1b -> ILOAD_1 java/util/ArrayList.<init>() 寄存器(指令):0x9a -> IFNE java/util/ArrayList.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/ArrayList.<init>() 寄存器(指令):0xb2 -> GET_STATIC java/util/ArrayList.<init>() 寄存器(指令):0xb5 -> PUT_FIELD java/util/ArrayList.<init>() 寄存器(指令):0xa7 -> GOTO java/util/ArrayList.<init>() 寄存器(指令):0xb1 -> RETURN java/lang/Throwable.<clinit>() 寄存器(指令):0xb8 -> INVOKE_STATIC java/util/Collections.unmodifiableList() 寄存器(指令):0x2a -> ALOAD_0 java/util/Collections.unmodifiableList() 寄存器(指令):0xc1 -> INSTANCE_OF java/util/Collections.unmodifiableList() 寄存器(指令):0x99 -> IFEQ java/util/Collections.unmodifiableList() 寄存器(指令):0xbb -> NEW java/util/Collections.unmodifiableList() 寄存器(指令):0x59 -> DUP java/util/Collections.unmodifiableList() 寄存器(指令):0x2a -> ALOAD_0 java/util/Collections.unmodifiableList() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/util/Collections$UnmodifiableList.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/Collections$UnmodifiableList.<init>() 寄存器(指令):0x2b -> ALOAD_1 java/util/Collections$UnmodifiableList.<init>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/util/Collections$UnmodifiableCollection.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/Collections$UnmodifiableCollection.<init>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/lang/Object.<init>() 寄存器(指令):0xb1 -> RETURN java/util/Collections$UnmodifiableCollection.<init>() 寄存器(指令):0x2b -> ALOAD_1 java/util/Collections$UnmodifiableCollection.<init>() 寄存器(指令):0xc7 -> IFNONNULL java/util/Collections$UnmodifiableCollection.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/Collections$UnmodifiableCollection.<init>() 寄存器(指令):0x2b -> ALOAD_1 java/util/Collections$UnmodifiableCollection.<init>() 寄存器(指令):0xb5 -> PUT_FIELD java/util/Collections$UnmodifiableCollection.<init>() 寄存器(指令):0xb1 -> RETURN java/util/Collections$UnmodifiableList.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/Collections$UnmodifiableList.<init>() 寄存器(指令):0x2b -> ALOAD_1 java/util/Collections$UnmodifiableList.<init>() 寄存器(指令):0xb5 -> PUT_FIELD java/util/Collections$UnmodifiableList.<init>() 寄存器(指令):0xb1 -> RETURN java/util/Collections.unmodifiableList() 寄存器(指令):0xb0 -> ARETURN java/lang/Throwable.<clinit>() 寄存器(指令):0xb3 -> PUT_STATIC java/lang/Throwable.<clinit>() 寄存器(指令):0x03 -> ICONST_0 java/lang/Throwable.<clinit>() 寄存器(指令):0xbd -> ANEW_ARRAY java/lang/Throwable.<clinit>() 寄存器(指令):0xb3 -> PUT_STATIC java/lang/Throwable.<clinit>() 寄存器(指令):0xb1 -> RETURN java/lang/Throwable.<clinit>() 寄存器(指令):0x12 -> LDC java/lang/Throwable.<clinit>() 寄存器(指令):0xb6 -> INVOKE_VIRTUAL java/lang/Class.desiredAssertionStatus() 寄存器(指令):0x2a -> ALOAD_0 java/lang/Class.desiredAssertionStatus() 寄存器(指令):0xb6 -> INVOKE_VIRTUAL java/lang/Class.getClassLoader() 寄存器(指令):0x2a -> ALOAD_0 java/lang/Class.getClassLoader() 寄存器(指令):0xb6 -> INVOKE_VIRTUAL java/lang/Class.getClassLoader0() 寄存器(指令):0x2a -> ALOAD_0 java/lang/Class.getClassLoader0() 寄存器(指令):0xb4 -> GET_FIELD java/lang/Class.getClassLoader0() 寄存器(指令):0xb0 -> ARETURN java/lang/Class.getClassLoader() 寄存器(指令):0x4c -> ASTORE_1 java/lang/Class.getClassLoader() 寄存器(指令):0x2b -> ALOAD_1 java/lang/Class.getClassLoader() 寄存器(指令):0xc7 -> IFNONNULL java/lang/Class.getClassLoader() 寄存器(指令):0x01 -> ACONST_NULL java/lang/Class.getClassLoader() 寄存器(指令):0xb0 -> ARETURN java/lang/Class.desiredAssertionStatus() 寄存器(指令):0x4c -> ASTORE_1 java/lang/Class.desiredAssertionStatus() 寄存器(指令):0x2b -> ALOAD_1 java/lang/Class.desiredAssertionStatus() 寄存器(指令):0xc7 -> IFNONNULL java/lang/Class.desiredAssertionStatus() 寄存器(指令):0x2a -> ALOAD_0 java/lang/Class.desiredAssertionStatus() 寄存器(指令):0xb8 -> INVOKE_STATIC java/lang/Class.desiredAssertionStatus0() 寄存器(指令):0xfe -> INVOKE_NATIVE java/lang/Class.desiredAssertionStatus0() 寄存器(指令):0xac -> IRETURN java/lang/Class.desiredAssertionStatus() 寄存器(指令):0xac -> IRETURN java/lang/Throwable.<clinit>() 寄存器(指令):0x9a -> IFNE java/lang/Throwable.<clinit>() 寄存器(指令):0x04 -> ICONST_1 java/lang/Throwable.<clinit>() 寄存器(指令):0xa7 -> GOTO java/lang/Throwable.<clinit>() 寄存器(指令):0xb3 -> PUT_STATIC java/lang/Throwable.<clinit>() 寄存器(指令):0x03 -> ICONST_0 java/lang/Throwable.<clinit>() 寄存器(指令):0xbd -> ANEW_ARRAY java/lang/Throwable.<clinit>() 寄存器(指令):0xb3 -> PUT_STATIC java/lang/Throwable.<clinit>() 寄存器(指令):0xbb -> NEW java/lang/Throwable.<clinit>() 寄存器(指令):0x59 -> DUP java/lang/Throwable.<clinit>() 寄存器(指令):0x03 -> ICONST_0 java/lang/Throwable.<clinit>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/util/ArrayList.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/ArrayList.<init>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/util/AbstractList.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/AbstractList.<init>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/util/AbstractCollection.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/AbstractCollection.<init>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/lang/Object.<init>() 寄存器(指令):0xb1 -> RETURN java/util/AbstractCollection.<init>() 寄存器(指令):0xb1 -> RETURN java/util/AbstractList.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/AbstractList.<init>() 寄存器(指令):0x03 -> ICONST_0 java/util/AbstractList.<init>() 寄存器(指令):0xb5 -> PUT_FIELD java/util/AbstractList.<init>() 寄存器(指令):0xb1 -> RETURN java/util/ArrayList.<init>() 寄存器(指令):0x1b -> ILOAD_1 java/util/ArrayList.<init>() 寄存器(指令):0x9e -> IFLE java/util/ArrayList.<init>() 寄存器(指令):0x1b -> ILOAD_1 java/util/ArrayList.<init>() 寄存器(指令):0x9a -> IFNE java/util/ArrayList.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/ArrayList.<init>() 寄存器(指令):0xb2 -> GET_STATIC java/util/ArrayList.<init>() 寄存器(指令):0xb5 -> PUT_FIELD java/util/ArrayList.<init>() 寄存器(指令):0xa7 -> GOTO java/util/ArrayList.<init>() 寄存器(指令):0xb1 -> RETURN java/lang/Throwable.<clinit>() 寄存器(指令):0xb8 -> INVOKE_STATIC java/util/Collections.unmodifiableList() 寄存器(指令):0x2a -> ALOAD_0 java/util/Collections.unmodifiableList() 寄存器(指令):0xc1 -> INSTANCE_OF java/util/Collections.unmodifiableList() 寄存器(指令):0x99 -> IFEQ java/util/Collections.unmodifiableList() 寄存器(指令):0xbb -> NEW java/util/Collections.unmodifiableList() 寄存器(指令):0x59 -> DUP java/util/Collections.unmodifiableList() 寄存器(指令):0x2a -> ALOAD_0 java/util/Collections.unmodifiableList() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/util/Collections$UnmodifiableList.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/Collections$UnmodifiableList.<init>() 寄存器(指令):0x2b -> ALOAD_1 java/util/Collections$UnmodifiableList.<init>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/util/Collections$UnmodifiableCollection.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/Collections$UnmodifiableCollection.<init>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/lang/Object.<init>() 寄存器(指令):0xb1 -> RETURN java/util/Collections$UnmodifiableCollection.<init>() 寄存器(指令):0x2b -> ALOAD_1 java/util/Collections$UnmodifiableCollection.<init>() 寄存器(指令):0xc7 -> IFNONNULL java/util/Collections$UnmodifiableCollection.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/Collections$UnmodifiableCollection.<init>() 寄存器(指令):0x2b -> ALOAD_1 java/util/Collections$UnmodifiableCollection.<init>() 寄存器(指令):0xb5 -> PUT_FIELD java/util/Collections$UnmodifiableCollection.<init>() 寄存器(指令):0xb1 -> RETURN java/util/Collections$UnmodifiableList.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/util/Collections$UnmodifiableList.<init>() 寄存器(指令):0x2b -> ALOAD_1 java/util/Collections$UnmodifiableList.<init>() 寄存器(指令):0xb5 -> PUT_FIELD java/util/Collections$UnmodifiableList.<init>() 寄存器(指令):0xb1 -> RETURN java/util/Collections.unmodifiableList() 寄存器(指令):0xb0 -> ARETURN java/lang/Throwable.<clinit>() 寄存器(指令):0xb3 -> PUT_STATIC java/lang/Throwable.<clinit>() 寄存器(指令):0x03 -> ICONST_0 java/lang/Throwable.<clinit>() 寄存器(指令):0xbd -> ANEW_ARRAY java/lang/Throwable.<clinit>() 寄存器(指令):0xb3 -> PUT_STATIC java/lang/Throwable.<clinit>() 寄存器(指令):0xb1 -> RETURN org/itstack/demo/test/HelloWorld.main() 寄存器(指令):0xbb -> NEW org/itstack/demo/test/HelloWorld.main() 寄存器(指令):0x59 -> DUP org/itstack/demo/test/HelloWorld.main() 寄存器(指令):0x12 -> LDC org/itstack/demo/test/HelloWorld.main() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/lang/RuntimeException.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/lang/RuntimeException.<init>() 寄存器(指令):0x2b -> ALOAD_1 java/lang/RuntimeException.<init>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/lang/Exception.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/lang/Exception.<init>() 寄存器(指令):0x2b -> ALOAD_1 java/lang/Exception.<init>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/lang/Throwable.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/lang/Throwable.<init>() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/lang/Object.<init>() 寄存器(指令):0xb1 -> RETURN java/lang/Throwable.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/lang/Throwable.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/lang/Throwable.<init>() 寄存器(指令):0xb5 -> PUT_FIELD java/lang/Throwable.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/lang/Throwable.<init>() 寄存器(指令):0xb2 -> GET_STATIC java/lang/Throwable.<init>() 寄存器(指令):0xb5 -> PUT_FIELD java/lang/Throwable.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/lang/Throwable.<init>() 寄存器(指令):0xb2 -> GET_STATIC java/lang/Throwable.<init>() 寄存器(指令):0xb5 -> PUT_FIELD java/lang/Throwable.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/lang/Throwable.<init>() 寄存器(指令):0xb6 -> INVOKE_VIRTUAL java/lang/Throwable.fillInStackTrace() 寄存器(指令):0x2a -> ALOAD_0 java/lang/Throwable.fillInStackTrace() 寄存器(指令):0xb4 -> GET_FIELD java/lang/Throwable.fillInStackTrace() 寄存器(指令):0xc7 -> IFNONNULL java/lang/Throwable.fillInStackTrace() 寄存器(指令):0x2a -> ALOAD_0 java/lang/Throwable.fillInStackTrace() 寄存器(指令):0x03 -> ICONST_0 java/lang/Throwable.fillInStackTrace() 寄存器(指令):0xb7 -> INVOKE_SPECIAL java/lang/Throwable.fillInStackTrace() 寄存器(指令):0xfe -> INVOKE_NATIVE java/lang/Throwable.fillInStackTrace() 寄存器(指令):0xb0 -> ARETURN java/lang/Throwable.fillInStackTrace() 寄存器(指令):0x57 -> POP java/lang/Throwable.fillInStackTrace() 寄存器(指令):0x2a -> ALOAD_0 java/lang/Throwable.fillInStackTrace() 寄存器(指令):0xb2 -> GET_STATIC java/lang/Throwable.fillInStackTrace() 寄存器(指令):0xb5 -> PUT_FIELD java/lang/Throwable.fillInStackTrace() 寄存器(指令):0x2a -> ALOAD_0 java/lang/Throwable.fillInStackTrace() 寄存器(指令):0xb0 -> ARETURN java/lang/Throwable.<init>() 寄存器(指令):0x57 -> POP java/lang/Throwable.<init>() 寄存器(指令):0x2a -> ALOAD_0 java/lang/Throwable.<init>() 寄存器(指令):0x2b -> ALOAD_1 java/lang/Throwable.<init>() 寄存器(指令):0xb5 -> PUT_FIELD java/lang/Throwable.<init>() 寄存器(指令):0xb1 -> RETURN java/lang/Exception.<init>() 寄存器(指令):0xb1 -> RETURN java/lang/RuntimeException.<init>() 寄存器(指令):0xb1 -> RETURN org/itstack/demo/test/HelloWorld.main() 寄存器(指令):0xbf -> ATHROW java.lang.RuntimeException:自定义异常 org.itstack.demo.test.HelloWorld.main(HelloWorld.java:9) Process finished with exit code 0 复制代码
上一篇: 用Java实现JVM第九章《本地方法调用》
微信搜索「 bugstack虫洞栈 」公众号,关注后回复「 用Java实现jvm源码 」获取本文源码&更多原创专题案例!