macOS Mojave上的GDB错误

Question

环境：Mac / Mojave和GDB 8.2.1（通过自制软件）。

我通过https://forward-in-code.blogspot.com/2018/11/mojave-vs-gdb.html指令工作，即：

• 最新的GDB via brew，解决了可执行格式问题
• 使用新的权利签署GDB

另外，我还修改了SIP以允许调试（在Recovery OS终端：csrutil enable --without debug）。

但是，我还是无法让gdb工作：

(gdb) file main
Reading symbols from main...done.
(gdb) run
Starting program: /Users/joubertold/code/Rhodus/obj/debug/main 
[New Thread 0x1a03 of process 5082]
[New Thread 0x2803 of process 5082]
During startup program terminated with signal ?, Unknown signal.
(gdb) 

有趣的是，lldb对我使用相同的二进制文件：

(lldb) file main
Current executable set to 'main' (x86_64).
(lldb) run
Process 5086 launched: '/Users/joubertold/code/Rhodus/obj/debug/main' (x86_64)
Rhodus
 1 is ONE
 1 is between 1 and 10
 1 is between 1 and 10
 1 is between 1 and 10
 1 is between 1 and 10
 1 is between 1 and 10
 1 is between 1 and 10
 1 is between 1 and 10
 1 is between 1 and 10
 1 is beyond
 1 is beyond
 1 is beyond
Process 5086 exited with status = 0 (0x00000000) 
(lldb) 

有什么想法吗？

Answer 1

我让gdb在Mojave上工作：

a）获取最新的gdb源存档（在撰写本文时，ftp://sourceware.org/pub/gdb/snapshots/current/gdb-weekly-8.2.50.20190212.tar.xz） - 除其他外，它还增加了在Mac上识别可执行文件的处理。

b）构建gdb。我在darwin-nat.c中得到了变量阴影的错误，所以我编辑了文件并重建（diff https://gist.github.com/joubertnel/267ca0fff4eaad494cc19ec3ba7953ed）。

c）按照https://forward-in-code.blogspot.com/2018/11/mojave-vs-gdb.html中的步骤进行操作

瞧。