From: Simon Marchi <simark@simark.ca>
To: Bruno Larsen <blarsen@redhat.com>, Carl Love <cel@us.ibm.com>,
gdb-patches@sourceware.org,
UlrichWeigand <Ulrich.Weigand@de.ibm.com>,
pedro@palves.net
Cc: luis.machado@arm.com
Subject: Re: [PATCH v4] Fix reverse stepping multiple contiguous PC ranges over the line table.
Date: Thu, 11 May 2023 13:28:40 -0400 [thread overview]
Message-ID: <961a88a7-a820-fd32-c7ee-e707697e22a5@simark.ca> (raw)
In-Reply-To: <cdb524fc-4dc4-69f1-4b6a-1803d77a7488@redhat.com>
> I was going to suggest something similar in an earlier revision, but
> when I tried to look for how to control it in clang, I couldn't see it
> at all, that's why I thought it was OK to restrict it to gcc only. Can
> clang (or other compilers for that matter) emit this information?clang does, yes, with the same flags as gcc:
https://clang.llvm.org/docs/ClangCommandLineReference.html#cmdoption-clang-gcolumn-info
> Also, how would gdb_compile handle if the current compiler doesn't
> support a given option, but the others do? Should it loudly fail, or
> silently ignore the "broken" option? If the second, I guess there is
> no harm in allowing clang to run these tests and testing the same
> scenario twice
I'm not sure, you'd have to look at how other options are handled.
But intuitively, if gdb_compile isn't able to fulfill your request, then
it should fail. For instance, if you used no-column-info with gcc 6
(which doesn't support column info at all), gdb_compile should succeed,
even if there isn't an option to disable column info with that compiler.
If you used column-info with gcc 6, gdb_compile would fail.
If there exists some compiler that always emits column info, with no
option to turn it off, then column-info would work with that compiler,
but no-column-info wouldn't.
To start with, I think it's fine to make column-info and no-column-info
map to -gcolumn-info and -gno-column-info. And then, you can probably
teach gdb_compile about older gccs and older clangs that don't support
column info.
If people test with other compilers that don't support -gcolumn-info or
-gno-column-info, the test won't compile. They can then contribute
support for the column-info / no-column-info options for that compiler.
Simon
next prev parent reply other threads:[~2023-05-11 17:28 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-27 20:59 [PATCH] " Carl Love
2023-05-02 14:15 ` Bruno Larsen
2023-05-02 15:40 ` Carl Love
2023-05-02 15:42 ` Bruno Larsen
2023-05-11 15:11 ` Simon Marchi
2023-05-03 9:53 ` Bruno Larsen
2023-05-04 2:55 ` Carl Love
2023-05-04 9:24 ` Bruno Larsen
2023-05-04 14:52 ` Carl Love
2023-05-04 2:55 ` [PATCH v2] " Carl Love
2023-05-04 15:59 ` [PATCH v3] " Carl Love
2023-05-05 14:59 ` Luis Machado
2023-05-05 16:10 ` Carl Love
2023-05-10 13:47 ` Bruno Larsen
2023-05-10 17:16 ` Carl Love
2023-05-10 17:32 ` [PATCH v4] " Carl Love
2023-05-11 16:01 ` Simon Marchi
2023-05-11 16:23 ` Bruno Larsen
2023-05-11 17:28 ` Simon Marchi [this message]
2023-05-16 22:54 ` [PATCH 1/2] " Carl Love
2023-06-19 17:11 ` Simon Marchi
2023-06-22 16:52 ` Carl Love
2023-06-23 17:44 ` Simon Marchi
2023-06-23 19:41 ` Carl Love
2023-06-23 20:04 ` [PATCH 1/2 ver 2] " Carl Love
2023-07-06 15:07 ` Carl Love
2023-05-16 22:54 ` [PATCH 2/2 v5] " Carl Love
2023-05-25 15:08 ` Carl Love
2023-06-08 16:36 ` Carl Love
2023-06-19 17:58 ` Simon Marchi
2023-06-22 20:38 ` Carl Love
2023-06-22 20:39 ` Carl Love
2023-06-23 17:49 ` Simon Marchi
2023-06-23 20:04 ` Carl Love
2023-06-23 20:04 ` [PATCH 2/2 v6] " Carl Love
2023-05-16 22:54 ` [PATCH v4] " Carl Love
2023-05-11 7:52 ` [PATCH v3] " Bruno Larsen
-- strict thread matches above, loose matches on Subject: below --
2022-05-06 8:55 [PATCH, v4] " Luis Machado
2022-05-06 15:04 ` [PATCH,v4] " Bruno Larsen
2022-05-06 16:46 ` [PATCH, v4] " Carl Love
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