bytecode-manipulation

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Java Byte code Manipulation with ASM

I’m using ASM 3.3.1. I am trying to intercept a class and change one of it’s methods. I am using the org.objectweb.asm.util.ASMifierClassVisitor to get ASM code to make the new method. Everything wo[详细]

2023-04-11 06:47 分类：问答
How does Emma work?

For using Emma we\'ll first instrument the jar using Emma. During that time em metadata files will get generated and when you run the JUnit test cases over the instrumented jars ec files will get gene[详细]

2023-04-04 22:28 分类：问答
Byte code instrumentation - implement native or java agent?

If I want to realize a profiler using byte code instrumentation, should I write a native agent using JVMTI or should I write a java agent using the java.lang.instrument package?[详细]

2023-04-03 04:21 分类：问答
Modify byte code to make a method return true

I have class file has a method like this: public boolean validate(String str) {} There\'re lots of codes inside this validat开发者_如何学JAVAe method, but I only want to make it always return true[详细]

2023-03-09 05:03 分类：问答
JPEG file size markers, inserting bytes, IPTC metadata

I\'m interested in manually injecting IPTC fields into JPG file on bytes level. JPEG file has multiple metadata segments with respectable size markers. The segments-containers for IPTC are:[详细]

2023-03-08 04:17 分类：问答
Inserting bytes in the middle of binary file

I want to add some string in the middle of image metadata block. Under some specific marker. I have to do it on bytes level since .NET has no support for custom metadata fields.[详细]

2023-03-03 19:17 分类：问答
Best way to change an integer field in a compiled 1.6 Java class with no source

A class file that was compiled with java 1.6 settings has two fields which I need to set to higher values.[详细]

2023-03-03 00:06 分类：问答
Asm bytecode queries

Hey all, I am trying to use the ASM bytecode Tree Api to do static analysis for a class. I guess I have a pretty basic question. In a method say foobar(), I have a list of instructions within foobar ([详细]

2023-02-26 07:19 分类：问答
variable definition and assignment detect asm bytecode

I am trying to use the ASM bytecode tree API for static analysis of Java Code. I have a ClassNode cn, MethodNode m and the list of instructions in that method say InsnList list.[详细]

2023-02-25 07:07 分类：问答
Is it possible to modify the bytecode and save it with javassist?

All the references I\'ve found on the web says the byte开发者_如何转开发code can be modified at runtime, but I don\'t seem to find if that modified bytecode could replace the original.[详细]

2023-02-15 01:29 分类：问答