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Re: [RFA] defs.h: Define GDB_DEFAULT_TARGET_[WIDE_]CHARSET for Cygwin and MingW builds
On Mar 2 10:03, Daniel Jacobowitz wrote:
> On Tue, Mar 02, 2010 at 03:13:24PM +0100, Corinna Vinschen wrote:
> > It looks to me as if a call to get_current_arch() in target_charset()
> > is the way to go. Otherwise, I don't see how this can be set up.
> > The problem here are the various places which call the target_charset()
> > function. The one call in c-lang.c, function charset_for_string_type()
> > looks simple, but the calls in util.c and python/py-utils.c look
> > pretty tricky. Or can I just refer to get_current_arch() in these
> > places?
>
> We're only supposed to call get_current_arch in the functions that
> implement UI commands. Everything else has to be passed a relevant
> architecture. This is a lot of hassle, but it's the way the design
> worked out.
>
> The one in c-lang.c is easy. charset_for_string_type takes a byte
> order already; wherever its callers get a byte order, they will get it
> from the gdbarch, so just pass the gdbarch instead. I checked, both
> eventual callers have one available
>
> For utils, both calls come through parse_escape. Since this has more
> calls, obviously, it's more of a mess :-(
>
> * echo_command is a command and can use get_current_arch.
>
> * Ditto for do_setshow_command.
>
> * Um, I guess the same is true for mi_parse_argv, but at this point I
> think something's wrong infrastructurally. Why do we care about the
> target charset when decoding MI commands? C has c_parse_escape, which
> always uses the host charset, and pushes conversion to the target
> charset elsewhere... at least, this will make the problem visible at
> the call site instead of buried.
>
> * That leaves the three yylex definitions, for Java, ObjC, and Pascal.
> For those, use parse_gdbarch.
Sorry, but I have to step down from patching this. There's too much
code involved I never had a look into and this is getting way over my
head for the simple seeming task of just setting a sane default for a
native Cygwin GDB.
Corinna
--
Corinna Vinschen
Cygwin Project Co-Leader
Red Hat