优化：

Target -> Build Setting -> Custom Complier Flags -> Other C Flags:

-fsanitize-coverage=func,trace-pc-guard

Target -> Build Setting -> Custom Complier Flags -> Other Swift Flags:

-sanitize-coverage=func

-sanitize=undefined

`#ifdef DEBUG

static dispatch_once_t onceToken;

dispatch_once(&onceToken, ^{

[CallOrderTool performSelector: @selector(dumpSymbols) withObject:nil afterDelay:1];

});

#endif`

Target -> Build Setting -> Linking -> Order File - order file路径

Target -> Build Setting -> Linking -> Write Link Map File 设置为 YES

Target -> Build Setting -> Linking -> Path to Link Map File：

~/Developer/Xcode/DerivedData/项目/Build/Intermediates.noindex/项目.build/Debug-iphonesimulator/项目.build/项目-LinkMap-normal-x86_64.txt

Symbols 部分

Address：方法代码的地址

Size：方法占用的空间文件里面的方法符号

Symbols 部分的 File 顺序是和 Target -> Build Phase -> Compile Sources 的文件顺序一致的。