[0x02] Reversing Shorts :: Backtracing Threads and Adding Symbols with Frida on iOS
Channel: jiska
Date: 2022-09-18

We'll continue analyzing the Signal app on iOS. This time, we add a backtrace to see which functions are accessing the message object. The example shows that a backtrace is bound to threading, e.g., libdispatch. Frida's DebugSymbol API can resolve many symbols in the backtrace, making it (almost) human-readable.

Full playlist of reversing shorts: https://www.youtube.com/playlist?list=PLkOopkYm0fCV45i_n8z5LSUL3QBXNAP2G

Chapters:
00:00 - How backtracing can help to find the needle in the haystack
01:28 - Code for backtracing with frida-trace
02:13 - How Frida adds symbols with DebugSymbol
03:24 - Backtrace demo for Signal messages
05:08 - Outro