bytecode

I'm trying to write a unit tests for a workaround to an issue about missing stackmap frames , but for that purpose I will need to generate a class that will fail to validate on Java 8 if it's missing stackmap frames. Below you can see my test case (dependencies: ASM, Guava, JUnit). It removes the stackmap frames from the GuineaPig class in hopes of causing its bytecode to fail to validate. The part that I'm having problems with is filling in the TODO in GuineaPig with minimal code that requires stackmap frames, so that the test would pass. import com.google.common.io.*; import org.junit.*;

Why is it so easy to decompile .NET IL-code into source code, compared to decompiling native x86 binaries? (Reflector produces quite good source code most of the time, while decompiling the output of a C++ compiler is almost impossible.) Is it because IL contains a lot of meta data? Or is it because IL is a higher abstraction than x86 instructions? I did some research and found the following two usefull articles, but neither of them answers my question. MSIL Decompiler Theory C Decompiler - Quick primer I think you've got the most important bits already. As you say, there's more metadata

I know how function comparison works in Python 3 (just comparing address in memory), and I understand why. I also understand that "true" comparison (do functions f and g return the same result given the same arguments, for any arguments?) is practically impossible. I am looking for something in between. I want the comparison to work on the simplest cases of identical functions, and possibly some less trivial ones: lambda x : x == lambda x : x # True lambda x : 2 * x == lambda y : 2 * y # True lambda x : 2 * x == lambda x : x * 2 # True or False is fine, but must be stable lambda x : 2 * x ==

If you have an anonymous class like Predicate<String> isEmpty = new Predicate<String>() { public boolean test(String t) { return t.isEmpty(); } }; A library which is passed the reference to isEmpty can inspect the byte code to see what it does and possibly manipulate it. Is there a way you can do this for lambdas? Predicate<String> isEmpty = String::isEmpty; e.g Say have this code and byte code public class Main { public static void test(Predicate<String> tester) { System.out.println("tester.getClass()= " + tester.getClass()); System.out.println("tester.getClass().getClassLoader()="+ tester

I'd like to create a new code object with the function types.CodeType() . There is almost no documentation about this and the existing one says "not for faint of heart" Tell me what i need and give me some information about each argument passed to types.CodeType , possibly posting an example. Note : In normal use cases you will just need the builtin function compile() You should use types.CodeType() only if you want to create new instructions that couldn't be obtained writing normal source code and that require direct access to bytecode. Alberto Perrella ––––––––––– Disclaimer : Documentation