GNU bug report logs -
#42657
emacs-27.1-rc1 and Asan findings
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Reported by: noloader <at> gmail.com
Date: Sat, 1 Aug 2020 20:24:02 UTC
Severity: normal
Done: Paul Eggert <eggert <at> cs.ucla.edu>
Bug is archived. No further changes may be made.
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Report forwarded
to
bug-gnu-emacs <at> gnu.org
:
bug#42657
; Package
emacs
.
(Sat, 01 Aug 2020 20:24:02 GMT)
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Acknowledgement sent
to
noloader <at> gmail.com
:
New bug report received and forwarded. Copy sent to
bug-gnu-emacs <at> gnu.org
.
(Sat, 01 Aug 2020 20:24:02 GMT)
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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):
I don't have log files for Asan testing. The process is killed before
the log file gets written.
I think just about every test failed similar to:
=================================================================
==18430==ERROR: LeakSanitizer: detected memory leaks
Direct leak of 16 byte(s) in 1 object(s) allocated from:
#0 0x7f4408236d28 in __interceptor_calloc
(/usr/lib/x86_64-linux-gnu/libasan.so.4+0xded28)
#1 0x56126c6f40a5 in dump_mmap_contiguous_heap
/home/jwalton/Build-Scripts/emacs-27.1/src/pdumper.c:4684
#2 0x56126c6f40a5 in dump_mmap_contiguous
/home/jwalton/Build-Scripts/emacs-27.1/src/pdumper.c:4868
#3 0x56126c6f40a5 in pdumper_load
/home/jwalton/Build-Scripts/emacs-27.1/src/pdumper.c:5428
#4 0x56126c47e1d2 in load_pdump
/home/jwalton/Build-Scripts/emacs-27.1/src/emacs.c:853
#5 0x56126c47e1d2 in main
/home/jwalton/Build-Scripts/emacs-27.1/src/emacs.c:1062
#6 0x7f4406512b96 in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x21b96)
SUMMARY: AddressSanitizer: 16 byte(s) leaked in 1 allocation(s).
Information forwarded
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bug-gnu-emacs <at> gnu.org
:
bug#42657
; Package
emacs
.
(Sat, 01 Aug 2020 20:33:01 GMT)
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Message #8 received at 42657 <at> debbugs.gnu.org (full text, mbox):
Am Sa., 1. Aug. 2020 um 22:24 Uhr schrieb Jeffrey Walton <noloader <at> gmail.com>:
>
> I don't have log files for Asan testing. The process is killed before
> the log file gets written.
>
> I think just about every test failed similar to:
>
> =================================================================
> ==18430==ERROR: LeakSanitizer: detected memory leaks
Emacs intentionally leaks a lot of memory (like every system with a
GC), so those tend to be false positives. If they still happen on
master, consider suppressing them using __lsan_ignore_object or
similar.
Information forwarded
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bug-gnu-emacs <at> gnu.org
:
bug#42657
; Package
emacs
.
(Sat, 01 Aug 2020 20:36:02 GMT)
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Message #11 received at 42657 <at> debbugs.gnu.org (full text, mbox):
On Sat, Aug 1, 2020 at 4:32 PM Philipp Stephani <p.stephani2 <at> gmail.com> wrote:
>
> Am Sa., 1. Aug. 2020 um 22:24 Uhr schrieb Jeffrey Walton <noloader <at> gmail.com>:
> >
> > I don't have log files for Asan testing. The process is killed before
> > the log file gets written.
> >
> > I think just about every test failed similar to:
> >
> > =================================================================
> > ==18430==ERROR: LeakSanitizer: detected memory leaks
>
>
> Emacs intentionally leaks a lot of memory (like every system with a
> GC), so those tend to be false positives. If they still happen on
> master, consider suppressing them using __lsan_ignore_object or
> similar.
How does one tell the good leaks from the bad leaks?
Jeff
Reply sent
to
Paul Eggert <eggert <at> cs.ucla.edu>
:
You have taken responsibility.
(Mon, 17 Aug 2020 23:45:02 GMT)
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Notification sent
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noloader <at> gmail.com
:
bug acknowledged by developer.
(Mon, 17 Aug 2020 23:45:02 GMT)
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Message #16 received at 42657-done <at> debbugs.gnu.org (full text, mbox):
> How does one tell the good leaks from the bad leaks?
In Emacs 27 please don't bother, as nobody had gotten around to marking leaks.
Since this bug report is about Emacs 27 I'm taking the liberty of closing it.
In the master branch we have marked leaks. I just built it with ./configure
CC='gcc -fsanitize=address' and 'make check' worked for me on Fedora 31 x86-64.
If you find a leak I suggest deciding whether the leak is worth worrying about
and then either plugging the leak or marking it as OK.
bug archived.
Request was from
Debbugs Internal Request <help-debbugs <at> gnu.org>
to
internal_control <at> debbugs.gnu.org
.
(Tue, 15 Sep 2020 11:24:05 GMT)
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This bug report was last modified 3 years and 222 days ago.
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