From: Andrea Corallo <andrea.corallo@arm.com>
To: "Marc Nieper-Wißkirchen" <marc.nieper+gnu@gmail.com>
Cc: "Marc Nieper-Wißkirchen via Jit" <jit@gcc.gnu.org>,
"Alex Coplan" <Alex.Coplan@arm.com>,
"Mark Wielaard" <mark@klomp.org>
Subject: Re: Memory leaks (detected by Valgrind)
Date: Fri, 17 Dec 2021 17:07:10 +0100 [thread overview]
Message-ID: <gkrr1abw6z5.fsf@arm.com> (raw)
In-Reply-To: <CAEYrNrSDdEweauiP3MKysPKLGF4hj9ev20OF3TCx8FYFVQT20Q@mail.gmail.com> ("Marc =?utf-8?Q?Nieper-Wi=C3=9Fkirchen=22's?= message of "Fri, 17 Dec 2021 16:11:06 +0100")
Marc Nieper-Wißkirchen <marc.nieper+gnu@gmail.com> writes:
> Am Fr., 17. Dez. 2021 um 15:54 Uhr schrieb Andrea Corallo <mailto:andrea.corallo@arm.com>:Marc Nieper-Wißkirchen via Jit <mailto:jit@gcc.gnu.org> writes:
>
>> Am Fr., 17. Dez. 2021 um 11:52 Uhr schrieb Alex Coplan <mailto:Alex.Coplan@arm.com
>>>:
>>
>>> Hi,
>>>
>>> > -----Original Message-----
>>> > From: Jit <jit-bounces+alex.coplan=mailto:arm.com@gcc.gnu.org> On Behalf Of
>>> Marc
>>> > Nieper-Wißkirchen via Jit
>>> > Sent: 17 December 2021 10:29
>>> > To: Mark Wielaard <mailto:mark@klomp.org>
>>> > Cc: Marc Nieper-Wißkirchen <mailto:marc.nieper%2Bgnu@gmail.com>; mailto:jit@gcc.gnu.org
>>> > Subject: Re: Memory leaks (detected by Valgrind)
>>> >
>>> > Thanks!
>>> >
>>> > With `--enable-valgrind-annotations`, the "uses of uninitialized values"
>>> > have gone away, but a lot of small leaks are still present:
>>>
>>> Memory leaks with libgccjit are a known issue, see
>>> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63854
>>
>>
>> Oh, that the bug has been open so long and is still open is unfortunate as
>> a process using libgccjit usually lasts a lot longer than a single compiler
>> run by gcc.
>
> This weakens the usefulness of libgccjit considerably, doesn't it?
Agree, IMO it does.
> If I have to start a new process to invoke it, only a bit is won
> compared to writing out C and using the C frontend of GCC through
> exec, no?
Correct. We leave with that also because we use subprocesses to obtain
parallelism (we have no posix thread exposure in Elisp) *and* in any
case we would not be able to backport the hypothetical fix to old
distros.
> How to you pass back the result of the compilation from the
> subprocess to the original process in Emacs?
For us it's easy as the output of the compilation is a file (we'll reuse
it in different sessions).
> PS How difficult is it to fix the memory leaks?
Good question.
Andrea
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next prev parent reply other threads:[~2021-12-17 16:07 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-16 17:17 Marc Nieper-Wißkirchen
2021-12-16 22:00 ` Marc Nieper-Wißkirchen
2021-12-16 22:26 ` Mark Wielaard
2021-12-17 10:29 ` Marc Nieper-Wißkirchen
2021-12-17 10:52 ` Alex Coplan
2021-12-17 14:03 ` Marc Nieper-Wißkirchen
2021-12-17 14:54 ` Andrea Corallo
2021-12-17 15:11 ` Marc Nieper-Wißkirchen
2021-12-17 16:07 ` Andrea Corallo [this message]
2021-12-17 17:53 ` Marc Nieper-Wißkirchen
2021-12-17 18:48 ` Andrea Corallo
2021-12-17 23:22 ` David Malcolm
2021-12-18 13:57 ` Marc Nieper-Wißkirchen
2021-12-18 16:45 ` David Malcolm
2021-12-18 17:50 ` Marc Nieper-Wißkirchen
2021-12-18 19:36 ` Marc Nieper-Wißkirchen
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