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RE: [patch v4 20/24] btrace, gdbserver: read branch trace incrementally
- From: "Metzger, Markus T" <markus dot t dot metzger at intel dot com>
- To: Jan Kratochvil <jan dot kratochvil at redhat dot com>
- Cc: "gdb-patches at sourceware dot org" <gdb-patches at sourceware dot org>, Pedro Alves <palves at redhat dot com>
- Date: Mon, 23 Sep 2013 07:09:18 +0000
- Subject: RE: [patch v4 20/24] btrace, gdbserver: read branch trace incrementally
- Authentication-results: sourceware.org; auth=none
- References: <1372842874-28951-1-git-send-email-markus dot t dot metzger at intel dot com> <1372842874-28951-21-git-send-email-markus dot t dot metzger at intel dot com> <20130818190905 dot GP24153 at host2 dot jankratochvil dot net> <A78C989F6D9628469189715575E55B230A9CEBAD at IRSMSX104 dot ger dot corp dot intel dot com> <20130922144224 dot GC19149 at host2 dot jankratochvil dot net>
> -----Original Message-----
> From: Jan Kratochvil [mailto:jan.kratochvil@redhat.com]
> Sent: Sunday, September 22, 2013 4:42 PM
> > I need to distinguish different types of errors, e.g. overflow and not
> supported.
>
> Then use enum. There is for example:
> enum return_reason
> {
> /* User interrupt. */
> RETURN_QUIT = -2,
> /* Any other error. */
> RETURN_ERROR
> };
>
> One could even throw and catch specific exceptions (enum errors) but I find
> that needlessly overcomplicated when we just return to the immediate
> caller.
In addition to errors I defined myself, I might get errors from the system call,
e.g. ENOMEM, EOPNOTSUPP, ENOSYS. For the not-available function, for
example, I'm just mimicking the error that would be returned by the system
call on systems where that call is not available.
Do you want me to translate those into an enum?
Markus.
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