com.alibaba.testable.agent.util

Class BytecodeUtil

java.lang.Object

com.alibaba.testable.agent.util.BytecodeUtil

public class BytecodeUtil
extends Object

Author:

flin

Constructor Summary

Constructors

Constructor and Description
BytecodeUtil()

Method Summary

Modifier and Type	Method and Description
static void	dumpByte(org.objectweb.asm.tree.ClassNode cn, String dumpPath, byte[] bytes) Dump byte code to specified class file
static org.objectweb.asm.tree.AbstractInsnNode	getIntInsn(int num) get ops code of load a int number
static ImmutablePair<Integer,Integer>	getLoadParameterByteCode(Byte type) get load ops-code of specified type
static int	stackEffect(int bytecode) Get stack impact of a specified ops code
static int	toPublicAccess(int access) Make sure method has public access

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

BytecodeUtil

public BytecodeUtil()

Method Detail

stackEffect

public static int stackEffect(int bytecode)

Get stack impact of a specified ops code

Parameters:

bytecode - ops code to check

Returns:

stack change

toPublicAccess

public static int toPublicAccess(int access)

Make sure method has public access

Parameters:

access - original access mark

Returns:

access mark with public flag

dumpByte

public static void dumpByte(org.objectweb.asm.tree.ClassNode cn,
                            String dumpPath,
                            byte[] bytes)

Dump byte code to specified class file

Parameters:

cn - original class node

dumpPath - folder to store class file

bytes - original class bytes

getLoadParameterByteCode

public static ImmutablePair<Integer,Integer> getLoadParameterByteCode(Byte type)

get load ops-code of specified type

Parameters:

type - type symbol

Returns:

pair of [ops-code, stack occupation]

getIntInsn

public static org.objectweb.asm.tree.AbstractInsnNode getIntInsn(int num)

get ops code of load a int number

Parameters:

num - number to load

Returns:

ops code