flexih/snake

Yet Another Mach-O Unused ObjC Selector/Class/Protocol Detector. 检测ObjC无用方法、无用类、无用协议。

Snake

🐍 Snake, Yet Another Mach-O Unused ObjC Selector/Class/Protocol Detector.

ObjC Metadata

• Classes ✔
• Protocols ✔
• Methods ✔
• Categories ✔
• Binding Info ✔
• ObjC-Specific Sections
  • __objc_selrefs ✔
  • __objc_superrefs ✔
  • __objc_classrefs ✔
  • __objc_classlist ✔
  • __objc_catlist ✔
  • __objc_protolist ✔

See SnakeKit

Features

• Parse Mach-O directly, no Symbols option required in Strip style of Build Settings, no depends on otool.
• Unused selectors.
• Unsued classes.
• Unused protocols.
• Duplicate selectors.
• All classes.
• Selector/Classes/Protocols sort by library, and selector size, if Linkmap file provided.
• Fast, a 460.6M binary and a 134.3M linkmap file costs 1.62s(3.7 GHz 6-Core Intel Core i5;40 GB 2667 MHz DDR4).

Homebrew

brew tap flexih/tap && brew install snake

How To Use

Usage:
  snake [-dscp] [-l path] path/to/binary ...

  -s, --selector     Unused selectors
  -c, --class        Unused classes
  -p, --protocol     Unused protocoles
  -d, --duplicate    Duplicate selectors
  -a, --allclass     All Classes
  -l, --linkmap arg  Linkmap file, which has selector size, library name
  -j, --json         Output json format
      --help         Print help

snake -l path/to/linkmap path/to/binary [-dscpa]

Example

bin/snake -l demo/release/demo-LinkMap-normal-x86_64.txt demo/release/demo.app/demo -c

Total Lib Count: 1
Total Unused Class Count: 3

# demo

SceneDelegate
UnusedClass
ViewController

bin/snake -l demo/release/demo-LinkMap-normal-x86_64.txt demo/release/demo.app/demo -s

Total Lib Count: 1
Total Class Count: 2
Total Unused Selector: 2

# demo

@ UnusedClass
-[UnusedClass unusedMethOfUnusedClass]  6

@ UsedClass
-[UsedClass unusedMeth] 6

Storyboard

Used selectors

python2 storyboard.py path/to/x.storyboard

Source

git clone --recursive https://github.com/flexih/Snake.git

Details

Objective-C二进制瘦身

Credits

• cxxopts

snake's Issues

能否给个详细的用法

bin/snake -l demo/release/demo-LinkMap-normal-x86_64.txt demo/release/demo.app/demo -c
Segmentation fault: 11

需要优化 xib 方法的筛选

举个例子，假设类ACell，通过 XIB 链接了 属性 aButton，click: 方法，snake 会报 [ACell click] 和 setAButton 没有被引用

得到输出结果或者返回值

目前只做到了在控制台输出，是否可以做成支持回输出文件参数保存本地文件，或者直接给出一个返回值呢，这样自动化脚本分析的时候，可以做流程化了

Unused selectors

unused selectors can be filtered set and get methods, thanks.

不是MH_EXECUTE怎么解析

你好,我看了一下源码,只解析MH_EXECUTE类型的,如果是静态库类型的怎么解析

snake: mach_header.filetype != MH_EXECUTE 这个是什么引起的？