[PATCH 0/4] Fewer calls to "open" when stepping

[Eli Zaretskii]

> From: Tom Tromey <tromey@adacore.com>
> Date: Fri, 26 Jul 2019 07:34:19 -0600
> 
> A user noticed that gdb calls open very many times while stepping.
> 
> This series improves gdb's behavior by changing the source cache to
> also cache un-highlighted text, and to track the "line_charpos" data
> that is currently put into the symtab.  It also includes a patch to
> fix an apparently longstanding logic bug in the source file error
> reporting.
> 
> Tested on x86-64 Fedora 29.

IMO, it should be tested on MS-Windows as well, since there's a
complex relationship there between lseek and fstat (and offsets into
the file in general), due to the CRLF EOL format.

Thanks.