From: Joel Brobecker <brobecker@adacore.com>
To: Tom Tromey <tom@tromey.com>
Cc: gdb-patches@sourceware.org
Subject: Re: [pushed+RFC] C++ exception during command triggers stale cleanup internal-warning
Date: Tue, 22 May 2018 15:48:00 -0000 [thread overview]
Message-ID: <20180522145832.lfjva34lztffr36y@adacore.com> (raw)
In-Reply-To: <87lgcbg2yu.fsf@tromey.com>
> Joel> But at the same time, this leads me to believe we may have a weakness
> Joel> top.c::execute_command, which installs a cleanup, and "forgets" to
> Joel> discard it when C++ exceptions are raised.
>
> My view was always that dangling cleanups are nearly always bugs; with
> the exceptions being functions that either mention "cleanup" in the name
> or return a cleanup.
Completely agreed. My question is: Should the function catch C++
exceptions in order to take care of the cleanup before re-throwing?
Thinking things further, I am realizing that this function is most
likely not alone in that situation. So there is no clear reason
to be treating that function specifically.
> I'm still hoping that we can just remove all cleanups and not have to
> deal with the issue any more.
Agree on the goal. To say that I am not a fan of cleanups would be
an understatement (I used to like them, until I realized how tricky
they are to maintain).
--
Joel
next prev parent reply other threads:[~2018-05-22 14:58 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-19 20:37 [RFA 0/3] More Ada cleanup removal Tom Tromey
2018-05-19 16:06 ` [RFA 2/3] Remove cleanup from ada_collect_symbol_completion_matches Tom Tromey
2018-05-21 0:09 ` Simon Marchi
2018-05-19 16:06 ` [RFA 3/3] Change ada_catchpoint::excep_string to be a std::string Tom Tromey
2018-05-21 1:12 ` Simon Marchi
2018-05-22 14:49 ` [pushed+RFC] C++ exception during command triggers stale cleanup internal-warning Joel Brobecker
2018-05-22 14:50 ` [pushed/Ada] fix "stale cleanup" internal-warning when using "catch assert" command Joel Brobecker
2018-05-22 14:58 ` [pushed+RFC] C++ exception during command triggers stale cleanup internal-warning Tom Tromey
2018-05-22 15:48 ` Joel Brobecker [this message]
2018-05-19 20:37 ` [RFA 1/3] Remove cleanup from ada-lang.c Tom Tromey
2018-05-21 0:06 ` Simon Marchi
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