RE: [rfc] btrace: change record instruction-history /m

["Metzger, Markus T" <markus dot t dot metzger at intel dot com>]

> -----Original Message-----
> From: Doug Evans [mailto:dje@google.com]
> Sent: Friday, August 14, 2015 7:02 PM
> To: Metzger, Markus T
> Cc: Pedro Alves; gdb-patches
> Subject: Re: [rfc] btrace: change record instruction-history /m


> > Alternatively, we could extend Doug Evan's new algorithm
> > https://sourceware.org/ml/gdb-patches/2015-08/msg00335.html to take a
> vector
> > of PCs.
> >
> > 2015-08-14  Markus Metzger <markus.t.metzger@intel.com>
> >
> > gdb/
> >         * record-btrace.c (struct btrace_line_range): New.
> >         (btrace_mk_line_range, btrace_line_range_add)
> >         (btrace_line_range_is_empty, btrace_line_range_contains_range)
> >         (btrace_find_line_range, btrace_print_lines): New.
> >         (btrace_insn_history): Add source interleaving algorithm.
> 
> Yeah, I'd like to avoid having multiple copies of code
> doing basically the same thing.
> Plus, no one is going to look in record-btrace.c for
> "smart disassembly support".
> disasm.c should be providing the necessary API
> that the rest of gdb an use.

OK, I'll look into it.  I have a few other things to do first.

I wouldn't get too fancy, though, and simply replace the low/high
PC pair with a vector of PCs.  We may have a small wrapper that
generates the vector out of a low/high pair to keep the original
API.

Regards,
Markus.
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