From: Eli Zaretskii <eliz@gnu.org>
To: "Mattias Engdegård" <mattiase@acm.org>
Cc: jrm@ftfl.ca, eggert@cs.ucla.edu, 37006@debbugs.gnu.org
Subject: bug#37006: 27.0.50; garbage collection not happening after 26de2d42
Date: Sun, 11 Aug 2019 20:07:15 +0300 [thread overview]
Message-ID: <83ftm7tyv0.fsf@gnu.org> (raw)
In-Reply-To: <24BB9DB5-D832-462F-A03C-5595A80B6973@acm.org> (message from Mattias Engdegård on Sun, 11 Aug 2019 18:23:28 +0200)
> From: Mattias Engdegård <mattiase@acm.org>
> Date: Sun, 11 Aug 2019 18:23:28 +0200
> Cc: Eli Zaretskii <eliz@gnu.org>, Paul Eggert <eggert@cs.ucla.edu>,
> 37006@debbugs.gnu.org
>
> Observed on macOS as well. Reason: free_cons has the condition
>
> if (INT_ADD_WRAPV (consing_until_gc, sizeof *ptr, &consing_until_gc))
>
> which will return true (overflow) if consing_until_gc is negative, which is kind of defensible since sizeof is unsigned which causes the sum (consing_until_gc + sizeof *ptr) to be a large unsigned number that doesn't fit into consing_until_gc.
>
> Clang 10 defines __GNUC__ to 4 which causes intprops.h to not use __builtin_add_overflow despite that being present and working.
>
> Casting the sizeof should fix it; patch attached.
I believe it should be fixed now.
next prev parent reply other threads:[~2019-08-11 17:07 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <5075406D-6DB8-4560-BB64-7198526FCF9F@acm.org>
2019-08-11 16:23 ` bug#37006: 27.0.50; garbage collection not happening after 26de2d42 Mattias Engdegård
2019-08-11 17:07 ` Eli Zaretskii [this message]
[not found] ` <83h86nu0pq.fsf@gnu.org>
[not found] ` <86pnlbphus.fsf@phe.ftfl.ca>
2019-08-12 2:31 ` Eli Zaretskii
2019-08-12 14:34 ` Joseph Mingrone
2019-08-12 16:49 ` Eli Zaretskii
2019-08-12 17:00 ` Mattias Engdegård
2019-08-13 15:37 ` Eli Zaretskii
2019-08-13 16:48 ` Mattias Engdegård
2019-08-13 17:04 ` Eli Zaretskii
2019-08-13 17:29 ` Mattias Engdegård
2019-08-13 17:21 ` Paul Eggert
2019-08-13 17:53 ` Eli Zaretskii
2019-08-13 19:32 ` Paul Eggert
2019-08-14 16:06 ` Eli Zaretskii
2019-08-15 1:37 ` Paul Eggert
2019-08-15 14:17 ` Eli Zaretskii
2019-08-15 18:51 ` Paul Eggert
2019-08-15 19:34 ` Eli Zaretskii
2019-09-14 7:51 ` Paul Eggert
2019-09-14 8:30 ` Eli Zaretskii
2019-08-11 12:39 Joseph Mingrone
2019-08-11 15:13 ` Eli Zaretskii
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