这个问题也是有点小折腾的
xcode - Missing symbol names when profiling IPhone application with Instruments - Stack Overflow
各种说法,人云亦云,最终原因只有一个。debug时要选择 dwarf with dSYM File.
参考:
1. xcode - Missing symbol names when profiling IPhone application with Instruments - Stack Overflow
2. Xcode Instruments Call Tree Symbol Name显示地址而不是函数名 – Roger的博客