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* [Bug libc/27581] New: Threaded program crashes under ulimit -s unlimited
@ 2021-03-15 15:46 jdelvare at suse dot de
2021-03-15 15:54 ` [Bug libc/27581] " fweimer at redhat dot com
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: jdelvare at suse dot de @ 2021-03-15 15:46 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=27581
Bug ID: 27581
Summary: Threaded program crashes under ulimit -s unlimited
Product: glibc
Version: 2.33
Status: NEW
Severity: normal
Priority: P2
Component: libc
Assignee: unassigned at sourceware dot org
Reporter: jdelvare at suse dot de
CC: drepper.fsp at gmail dot com
Target Milestone: ---
Created attachment 13312
--> https://sourceware.org/bugzilla/attachment.cgi?id=13312&action=edit
Reproducer
I have a simple program using pthreads which runs fine with the default ulimit
-s setting (8192) but crashes midway through execution when ran under ulimit -s
unlimited:
# ulimit -s unlimited
# ./thread_stack
MAIN 0x7ffe292afc2c
THREAD 0x14ae0f69befc
START 6
DONE 0x14ae0f5f92a0
START 5
DONE 0x14ae0f556650
START 4
DONE 0x14ae0f4b3a00
Segmentation fault (core dumped)
Is this a glibc bug?
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^ permalink raw reply [flat|nested] 5+ messages in thread* [Bug libc/27581] Threaded program crashes under ulimit -s unlimited
2021-03-15 15:46 [Bug libc/27581] New: Threaded program crashes under ulimit -s unlimited jdelvare at suse dot de
@ 2021-03-15 15:54 ` fweimer at redhat dot com
2021-03-15 19:24 ` hpj at urpla dot net
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: fweimer at redhat dot com @ 2021-03-15 15:54 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=27581
Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |fweimer at redhat dot com
--- Comment #1 from Florian Weimer <fweimer at redhat dot com> ---
Once you have multiple threads, there is really no such thing as an unlimited
stack anymore for conceptual reasons, so glibc just picks a 2 MiB default and
applies it to all the created stacks.
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^ permalink raw reply [flat|nested] 5+ messages in thread* [Bug libc/27581] Threaded program crashes under ulimit -s unlimited
2021-03-15 15:46 [Bug libc/27581] New: Threaded program crashes under ulimit -s unlimited jdelvare at suse dot de
2021-03-15 15:54 ` [Bug libc/27581] " fweimer at redhat dot com
@ 2021-03-15 19:24 ` hpj at urpla dot net
2021-03-15 21:45 ` carlos at redhat dot com
2021-03-19 10:56 ` jdelvare at suse dot de
3 siblings, 0 replies; 5+ messages in thread
From: hpj at urpla dot net @ 2021-03-15 19:24 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=27581
Hans-Peter Jansen <hpj at urpla dot net> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hpj at urpla dot net
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^ permalink raw reply [flat|nested] 5+ messages in thread* [Bug libc/27581] Threaded program crashes under ulimit -s unlimited
2021-03-15 15:46 [Bug libc/27581] New: Threaded program crashes under ulimit -s unlimited jdelvare at suse dot de
2021-03-15 15:54 ` [Bug libc/27581] " fweimer at redhat dot com
2021-03-15 19:24 ` hpj at urpla dot net
@ 2021-03-15 21:45 ` carlos at redhat dot com
2021-03-19 10:56 ` jdelvare at suse dot de
3 siblings, 0 replies; 5+ messages in thread
From: carlos at redhat dot com @ 2021-03-15 21:45 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=27581
Carlos O'Donell <carlos at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |carlos at redhat dot com
--- Comment #2 from Carlos O'Donell <carlos at redhat dot com> ---
(In reply to Florian Weimer from comment #1)
> Once you have multiple threads, there is really no such thing as an
> unlimited stack anymore for conceptual reasons, so glibc just picks a 2 MiB
> default and applies it to all the created stacks.
Right the relevant code is in nptl/nptl-init.c
(__pthread_initialize_minimal_internal).
Users still see these values of conceptually muddled, and it's hard to explain
the distinction between executable stack and the relation to thread stack
because there appears to be one but there isn't, there are just defaults being
adjusted to be heuristic matches.
In the case you need more control we provide pthread_setattr_default_np() that
allows you to set a larger default stack size for all threads by default. This
way you can independently control the stack size of all threads and the stack
size of the main program.
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^ permalink raw reply [flat|nested] 5+ messages in thread* [Bug libc/27581] Threaded program crashes under ulimit -s unlimited
2021-03-15 15:46 [Bug libc/27581] New: Threaded program crashes under ulimit -s unlimited jdelvare at suse dot de
` (2 preceding siblings ...)
2021-03-15 21:45 ` carlos at redhat dot com
@ 2021-03-19 10:56 ` jdelvare at suse dot de
3 siblings, 0 replies; 5+ messages in thread
From: jdelvare at suse dot de @ 2021-03-19 10:56 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=27581
Jean DELVARE <jdelvare at suse dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |NOTABUG
Status|NEW |RESOLVED
--- Comment #3 from Jean DELVARE <jdelvare at suse dot de> ---
Thank you very much for the quick answers. Closing as NOTABUG.
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^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2021-03-19 10:56 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2021-03-15 15:46 [Bug libc/27581] New: Threaded program crashes under ulimit -s unlimited jdelvare at suse dot de
2021-03-15 15:54 ` [Bug libc/27581] " fweimer at redhat dot com
2021-03-15 19:24 ` hpj at urpla dot net
2021-03-15 21:45 ` carlos at redhat dot com
2021-03-19 10:56 ` jdelvare at suse dot de
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