Reflection and obfuscation - Not the best friends!

[Bedrock_Miner]

Hello everyone!

 

Its me again.. I recently thought about whether its possible to get the obfuscated name for a method or a field at runtime.

This would mean you wouldn't have to write two statements to get the fields "field_71428_T" and "timer" from the class Minecraft.class, but you can just write

getFieldName("timer", Minecraft.class)

and you would automatically have the right field name.

 

Would this be possible?

[Draco18s]

There's a way of detecting if you're in a deobf environment (I don't use reflection often enough to be using that method, or remember what it's called) and you can do an

if(obf) { str = "p_1234_0_" } else { str = "theThing" }

and do the reflection with the

str

variable.

[Bedrock_Miner]

Apparently I didnt say clearly what I meant. 

I wanted to know whether there is a method to find out which obfuscated name belongs to a non-obfuscated name in a special class.

For instance, I have a method for this, I insert the class and the unobfuscated name and it returns the obfuscated one.

getObfuscatedName(Minecraft.class, "timer")
    returns: "field_71428_T"

[Draco18s]

Oh that.  Not that I know of.  All that info is stored in a CSV file:

 

C:\Users\[username]\.gradle\caches\minecraft\net\minecraftforge\forge\[forge version]\unpacked\conf

 

You want fields.csv and methods.csv and be aware that same-name objects in different classes have different obfuscated names.

[Bedrock_Miner]

Basically it would be possible to do the same with a mapping from MCP->SRG. The only problem would be that for some special variables more than one name would be returned. For these variables a special test would be needed which of the names exist in the given class. If you do it right, this method would be as fast as direct reflection.

But anyway, I think this is possible, or do I miss something?

 

EDIT:

Btw, is there a way to get the csv files for the mapping at runtime in eclipse as well as in the compiled mod somehow without copying them manually? Or do I need to copy them for every minecraft version that has a new mapping?

[Anon10W1z]

Look at ReflectionHelper.java. It allows you to put the SRG and dev names for fields and find them automatically.

[Bedrock_Miner]

I know that there is the possibility to modify a field when providing two possible names, but I want to get the Srg name from the Mcp one..

I think I'll include the mapping files in my library mod and create a class which loads them and acts like a dictionary.

[Bedrock_Miner]

This is a bad idea for several reasons. But oh well, go ahead. Your mod.

Why do you think this is a bad idea? And what are the reasons therefore?

[Bedrock_Miner]

I know how I could solve the problem with the non-unique names.

On the other hand the copyright is a heavy argument. Didnt know that the data is protected. I think I can forget this idea now if no one has another idea. How unfortunate.