Re: debugging a program that uses SIGTRAP

Michael FIG
2007-03-21T02:34:39Z

Thanks for the swift reply!

Daniel Jacobowitz <drow@false.org> writes:

> I don't see any good way to solve this. You've got two sets of
> breakpoints and they're both going to stop GDB - it doesn't know which
> ones you want and which you don't.

Okay. I thought somehow GDB would pass SIGTRAP iff it knows it has
not set a breakpoint on the current instruction pointer by scanning
its list of breakpoints.

> Even if you get past that point, your handler will now get called
> every time GDB hits a breakpoint or single steps - single stepping
> will probably be broken.

Would the above suggestion be reasonable? I think it would behave
nicer than what I have now, especially for my circumstance, since
there isn't any overlap between the code I'm trying to debug and the
code _it's_ trying to debug.

If it does seem reasonable, I can look into creating a patch. I
haven't gotten my hands dirty in GDB before. :)

--
Michael FIG <michael@fig.org> /\//\
http://fig.org/michael/ \//\/