Feature: support using gdb to debug fiber

[chhy2009]

No description provided.

[codecov]

Codecov Report

Merging #64 (46c04d7) into main (41485d6) will decrease coverage by 0.00016%.
The diff coverage is 86.56716%.

Additional details and impacted files

@@                 Coverage Diff                 @@
##                main         #64         +/-   ##
===================================================
- Coverage   81.61992%   81.61976%   -0.00016%     
===================================================
  Files            854         854                 
  Lines          33656       33721         +65     
===================================================
+ Hits           27470       27523         +53     
- Misses          6186        6198         +12     

Files	Coverage Δ
trpc/common/config/global_conf.cc	100.00000% <100.00000%> (ø)
trpc/common/config/global_conf.h	100.00000% <ø> (ø)
...me/threadmodel/fiber/detail/stack_allocator_impl.h	100.00000% <ø> (ø)
trpc/common/config/global_conf_parser.h	66.02564% <50.00000%> (-0.20814%)	⬇️
...e/threadmodel/fiber/detail/stack_allocator_impl.cc	90.90909% <87.50000%> (-0.88195%)	⬇️

... and 9 files with indirect coverage changes