need of SOFTWARE_SINGLE_STEP

Daniel Berlin dan@cgsoftware.com
Mon Jun 18 07:39:00 GMT 2001


"debashis  mahata" <debashis.mahata@wipro.com> writes:

> Hi,
> 
> I am just a new comer in GDB internals. I have a doubt regarding the necessity
> of SOFTWARE_SINGLE_STEP in the function resume() (file: infrun.c). My working
> platform is Sparc- Solaris 5.8 and going through the code of GDB 4.18. The
> question is :
> 
>  
> 
> The file procfs.c have the support for single step using the PRSTEP flag
> (function: proc_run_process() ). Then, is there any specific reason behind
> doing SOFTWARE_SINGLE_STEP rather than using the proc system
> support?
The fact that many host OSes of GDB have no procfs support?
>  Will
> there be any hidden side effect if I disabled SOFTWARE_SINGLE_STEP_P and use
> PRSTEP for single stepping?
Yes, you'll break GDB on a lot of platforms.
:)

> 
>  
> 
> Looking forward to an early response. 
> 
> Thanks in advance.
> 
> mahata.

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