* [Qemu-devel] [Bug 883136] Re: qemu on ARM hosts aborts on startup because makecontext() always fails
[not found] <20111028150756.31559.33093.malonedeb@chaenomeles.canonical.com>
@ 2011-12-02 15:19 ` Natalia Portillo
2011-12-21 17:42 ` Dr. David Alan Gilbert
` (11 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: Natalia Portillo @ 2011-12-02 15:19 UTC (permalink / raw)
To: qemu-devel
** Also affects: qemu
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/883136
Title:
qemu on ARM hosts aborts on startup because makecontext() always fails
Status in QEMU:
New
Status in Linaro QEMU:
New
Bug description:
qemu has recently grown a coroutines implementation. There are two
versions, one using the makecontext/setcontext/swapcontext functions
from ucontext.h, and one falling back to implementing coroutines as
separate glib threads. configure chooses the former if the platform
has a makecontext().
Unfortunately ARM eglibc provides a makecontext() which always fails
ENOSYS, which means the configure check passes but when qemu starts it
abort()s.
The best fix for this is probably going to involve making the
coroutine implementation runtime-selectable.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/883136/+subscriptions
^ permalink raw reply [flat|nested] 14+ messages in thread* [Qemu-devel] [Bug 883136] Re: qemu on ARM hosts aborts on startup because makecontext() always fails
[not found] <20111028150756.31559.33093.malonedeb@chaenomeles.canonical.com>
2011-12-02 15:19 ` [Qemu-devel] [Bug 883136] Re: qemu on ARM hosts aborts on startup because makecontext() always fails Natalia Portillo
@ 2011-12-21 17:42 ` Dr. David Alan Gilbert
2011-12-22 9:46 ` Stefan Hajnoczi
2011-12-23 17:17 ` Dr. David Alan Gilbert
` (10 subsequent siblings)
12 siblings, 1 reply; 14+ messages in thread
From: Dr. David Alan Gilbert @ 2011-12-21 17:42 UTC (permalink / raw)
To: qemu-devel
Attached is a 1st cut of a makecontext/setcontext/getcontext/swapcontext set for ARM - not ready to go into libc yet;
currently it builds standalone and links (and passes) with a test of mine. Next stop libc and a lot of cleanup.
** Changed in: qemu-linaro
Assignee: (unassigned) => Dr. David Alan Gilbert (davidgil-uk)
** Attachment added: "Start of a set of context routines"
https://bugs.launchpad.net/qemu-linaro/+bug/883136/+attachment/2642884/+files/allcontext.S
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https://bugs.launchpad.net/bugs/883136
Title:
qemu on ARM hosts aborts on startup because makecontext() always fails
Status in QEMU:
New
Status in Linaro QEMU:
New
Bug description:
qemu has recently grown a coroutines implementation. There are two
versions, one using the makecontext/setcontext/swapcontext functions
from ucontext.h, and one falling back to implementing coroutines as
separate glib threads. configure chooses the former if the platform
has a makecontext().
Unfortunately ARM eglibc provides a makecontext() which always fails
ENOSYS, which means the configure check passes but when qemu starts it
abort()s.
The best fix for this is probably going to involve making the
coroutine implementation runtime-selectable.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/883136/+subscriptions
^ permalink raw reply [flat|nested] 14+ messages in thread* Re: [Qemu-devel] [Bug 883136] Re: qemu on ARM hosts aborts on startup because makecontext() always fails
2011-12-21 17:42 ` Dr. David Alan Gilbert
@ 2011-12-22 9:46 ` Stefan Hajnoczi
0 siblings, 0 replies; 14+ messages in thread
From: Stefan Hajnoczi @ 2011-12-22 9:46 UTC (permalink / raw)
To: Bug 883136; +Cc: qemu-devel
On Wed, Dec 21, 2011 at 5:42 PM, Dr. David Alan Gilbert
<883136@bugs.launchpad.net> wrote:
> Attached is a 1st cut of a makecontext/setcontext/getcontext/swapcontext set for ARM - not ready to go into libc yet;
> currently it builds standalone and links (and passes) with a test of mine. Next stop libc and a lot of cleanup.
Excellent. There is a stand-alone QEMU coroutine test which you can
build with "make test-coroutine".
Stefan
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Qemu-devel] [Bug 883136] Re: qemu on ARM hosts aborts on startup because makecontext() always fails
[not found] <20111028150756.31559.33093.malonedeb@chaenomeles.canonical.com>
2011-12-02 15:19 ` [Qemu-devel] [Bug 883136] Re: qemu on ARM hosts aborts on startup because makecontext() always fails Natalia Portillo
2011-12-21 17:42 ` Dr. David Alan Gilbert
@ 2011-12-23 17:17 ` Dr. David Alan Gilbert
2012-01-05 0:47 ` Michael Hope
` (9 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: Dr. David Alan Gilbert @ 2011-12-23 17:17 UTC (permalink / raw)
To: qemu-devel
OK, here is a eglibc patch that adds the context routines; seems to pass
Stefan's magic coroutine test, pass all the context specific tests in
eglibc and boots a debian image on qemu. (Not run a full eglibc test
run yet).
Dave
** Attachment added: "eglibc patch for ARM context routines"
https://bugs.launchpad.net/qemu-linaro/+bug/883136/+attachment/2644972/+files/context-diff-v0.3
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https://bugs.launchpad.net/bugs/883136
Title:
qemu on ARM hosts aborts on startup because makecontext() always fails
Status in QEMU:
New
Status in Linaro QEMU:
New
Bug description:
qemu has recently grown a coroutines implementation. There are two
versions, one using the makecontext/setcontext/swapcontext functions
from ucontext.h, and one falling back to implementing coroutines as
separate glib threads. configure chooses the former if the platform
has a makecontext().
Unfortunately ARM eglibc provides a makecontext() which always fails
ENOSYS, which means the configure check passes but when qemu starts it
abort()s.
The best fix for this is probably going to involve making the
coroutine implementation runtime-selectable.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/883136/+subscriptions
^ permalink raw reply [flat|nested] 14+ messages in thread* [Qemu-devel] [Bug 883136] Re: qemu on ARM hosts aborts on startup because makecontext() always fails
[not found] <20111028150756.31559.33093.malonedeb@chaenomeles.canonical.com>
` (2 preceding siblings ...)
2011-12-23 17:17 ` Dr. David Alan Gilbert
@ 2012-01-05 0:47 ` Michael Hope
2012-01-05 0:58 ` Michael Hope
` (8 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: Michael Hope @ 2012-01-05 0:47 UTC (permalink / raw)
To: qemu-devel
** Changed in: qemu-linaro
Status: New => In Progress
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https://bugs.launchpad.net/bugs/883136
Title:
qemu on ARM hosts aborts on startup because makecontext() always fails
Status in QEMU:
New
Status in Linaro QEMU:
In Progress
Bug description:
qemu has recently grown a coroutines implementation. There are two
versions, one using the makecontext/setcontext/swapcontext functions
from ucontext.h, and one falling back to implementing coroutines as
separate glib threads. configure chooses the former if the platform
has a makecontext().
Unfortunately ARM eglibc provides a makecontext() which always fails
ENOSYS, which means the configure check passes but when qemu starts it
abort()s.
The best fix for this is probably going to involve making the
coroutine implementation runtime-selectable.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/883136/+subscriptions
^ permalink raw reply [flat|nested] 14+ messages in thread* [Qemu-devel] [Bug 883136] Re: qemu on ARM hosts aborts on startup because makecontext() always fails
[not found] <20111028150756.31559.33093.malonedeb@chaenomeles.canonical.com>
` (3 preceding siblings ...)
2012-01-05 0:47 ` Michael Hope
@ 2012-01-05 0:58 ` Michael Hope
2012-01-06 0:32 ` Michael Hope
` (7 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: Michael Hope @ 2012-01-05 0:58 UTC (permalink / raw)
To: qemu-devel
Removing Dave as he's done most of the work but can't complete it.
** Changed in: qemu-linaro
Importance: Undecided => Medium
** Changed in: qemu-linaro
Assignee: Dr. David Alan Gilbert (davidgil-uk) => (unassigned)
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https://bugs.launchpad.net/bugs/883136
Title:
qemu on ARM hosts aborts on startup because makecontext() always fails
Status in QEMU:
New
Status in Linaro QEMU:
In Progress
Bug description:
qemu has recently grown a coroutines implementation. There are two
versions, one using the makecontext/setcontext/swapcontext functions
from ucontext.h, and one falling back to implementing coroutines as
separate glib threads. configure chooses the former if the platform
has a makecontext().
Unfortunately ARM eglibc provides a makecontext() which always fails
ENOSYS, which means the configure check passes but when qemu starts it
abort()s.
The best fix for this is probably going to involve making the
coroutine implementation runtime-selectable.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/883136/+subscriptions
^ permalink raw reply [flat|nested] 14+ messages in thread* [Qemu-devel] [Bug 883136] Re: qemu on ARM hosts aborts on startup because makecontext() always fails
[not found] <20111028150756.31559.33093.malonedeb@chaenomeles.canonical.com>
` (4 preceding siblings ...)
2012-01-05 0:58 ` Michael Hope
@ 2012-01-06 0:32 ` Michael Hope
2012-01-12 10:17 ` Peter Maydell
` (6 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: Michael Hope @ 2012-01-06 0:32 UTC (permalink / raw)
To: qemu-devel
Consider putting this in 2.15 as well. Talk with Matthias re: getting
it into Ubuntu Precise either through a 2.13 backport or as part of a
2.15 update.
** Changed in: qemu-linaro
Assignee: (unassigned) => Ken Werner (kwerner)
--
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https://bugs.launchpad.net/bugs/883136
Title:
qemu on ARM hosts aborts on startup because makecontext() always fails
Status in QEMU:
New
Status in Linaro QEMU:
In Progress
Bug description:
qemu has recently grown a coroutines implementation. There are two
versions, one using the makecontext/setcontext/swapcontext functions
from ucontext.h, and one falling back to implementing coroutines as
separate glib threads. configure chooses the former if the platform
has a makecontext().
Unfortunately ARM eglibc provides a makecontext() which always fails
ENOSYS, which means the configure check passes but when qemu starts it
abort()s.
The best fix for this is probably going to involve making the
coroutine implementation runtime-selectable.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/883136/+subscriptions
^ permalink raw reply [flat|nested] 14+ messages in thread* [Qemu-devel] [Bug 883136] Re: qemu on ARM hosts aborts on startup because makecontext() always fails
[not found] <20111028150756.31559.33093.malonedeb@chaenomeles.canonical.com>
` (5 preceding siblings ...)
2012-01-06 0:32 ` Michael Hope
@ 2012-01-12 10:17 ` Peter Maydell
2012-02-20 16:42 ` Peter Maydell
` (5 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: Peter Maydell @ 2012-01-12 10:17 UTC (permalink / raw)
To: qemu-devel
Plan:
(a) get makecontext added to eglibc
(b) see if upstream eglibc are open to the idea of some sort of #define for MAKECONTEXT_ACTUALLY_IMPLEMENTED_NOW so we can detect it at compile time
(c) otherwise, work around in qemu (probably by adding another layer of indirection)
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https://bugs.launchpad.net/bugs/883136
Title:
qemu on ARM hosts aborts on startup because makecontext() always fails
Status in QEMU:
New
Status in Linaro QEMU:
In Progress
Bug description:
qemu has recently grown a coroutines implementation. There are two
versions, one using the makecontext/setcontext/swapcontext functions
from ucontext.h, and one falling back to implementing coroutines as
separate glib threads. configure chooses the former if the platform
has a makecontext().
Unfortunately ARM eglibc provides a makecontext() which always fails
ENOSYS, which means the configure check passes but when qemu starts it
abort()s.
The best fix for this is probably going to involve making the
coroutine implementation runtime-selectable.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/883136/+subscriptions
^ permalink raw reply [flat|nested] 14+ messages in thread* [Qemu-devel] [Bug 883136] Re: qemu on ARM hosts aborts on startup because makecontext() always fails
[not found] <20111028150756.31559.33093.malonedeb@chaenomeles.canonical.com>
` (6 preceding siblings ...)
2012-01-12 10:17 ` Peter Maydell
@ 2012-02-20 16:42 ` Peter Maydell
2012-02-23 15:21 ` Peter Maydell
` (4 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: Peter Maydell @ 2012-02-20 16:42 UTC (permalink / raw)
To: qemu-devel
David Gilbert's post to upstream eglibc, and a reply from Joseph Myers with some review comments:
http://comments.gmane.org/gmane.comp.lib.glibc.ports/1187
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https://bugs.launchpad.net/bugs/883136
Title:
qemu on ARM hosts aborts on startup because makecontext() always fails
Status in QEMU:
New
Status in Linaro QEMU:
In Progress
Bug description:
qemu has recently grown a coroutines implementation. There are two
versions, one using the makecontext/setcontext/swapcontext functions
from ucontext.h, and one falling back to implementing coroutines as
separate glib threads. configure chooses the former if the platform
has a makecontext().
Unfortunately ARM eglibc provides a makecontext() which always fails
ENOSYS, which means the configure check passes but when qemu starts it
abort()s.
The best fix for this is probably going to involve making the
coroutine implementation runtime-selectable.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/883136/+subscriptions
^ permalink raw reply [flat|nested] 14+ messages in thread* [Qemu-devel] [Bug 883136] Re: qemu on ARM hosts aborts on startup because makecontext() always fails
[not found] <20111028150756.31559.33093.malonedeb@chaenomeles.canonical.com>
` (7 preceding siblings ...)
2012-02-20 16:42 ` Peter Maydell
@ 2012-02-23 15:21 ` Peter Maydell
2012-03-06 19:39 ` Peter Maydell
` (3 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: Peter Maydell @ 2012-02-23 15:21 UTC (permalink / raw)
To: qemu-devel
Michael Hope pointed out that glibc defines a macro __stub_makecontext
when the makecontext() implementation is a stub, so we can just add this
to the qemu configure test to make it automatically fall back to the
pthreads version as required.
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https://bugs.launchpad.net/bugs/883136
Title:
qemu on ARM hosts aborts on startup because makecontext() always fails
Status in QEMU:
New
Status in Linaro QEMU:
In Progress
Bug description:
qemu has recently grown a coroutines implementation. There are two
versions, one using the makecontext/setcontext/swapcontext functions
from ucontext.h, and one falling back to implementing coroutines as
separate glib threads. configure chooses the former if the platform
has a makecontext().
Unfortunately ARM eglibc provides a makecontext() which always fails
ENOSYS, which means the configure check passes but when qemu starts it
abort()s.
The best fix for this is probably going to involve making the
coroutine implementation runtime-selectable.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/883136/+subscriptions
^ permalink raw reply [flat|nested] 14+ messages in thread* [Qemu-devel] [Bug 883136] Re: qemu on ARM hosts aborts on startup because makecontext() always fails
[not found] <20111028150756.31559.33093.malonedeb@chaenomeles.canonical.com>
` (8 preceding siblings ...)
2012-02-23 15:21 ` Peter Maydell
@ 2012-03-06 19:39 ` Peter Maydell
2012-03-06 19:40 ` Peter Maydell
` (2 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: Peter Maydell @ 2012-03-06 19:39 UTC (permalink / raw)
To: qemu-devel
http://comments.gmane.org/gmane.comp.lib.glibc.ports/1325
-- Michael's version of the makecontext patches has been committed to
glibc-ports and should be available in glibc 2.16.
Upstream qemu (and thus qemu-linaro) now have a version of the configure
check which tests for __stub_makecontext, so qemu will just
automatically pick up the makecontext implementation when compiled
against a glibc which supports it. So I think the only remaining thing
is to decide whether Linaro and/or Ubuntu want to backport this.
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https://bugs.launchpad.net/bugs/883136
Title:
qemu on ARM hosts aborts on startup because makecontext() always fails
Status in QEMU:
Fix Committed
Status in Linaro QEMU:
Fix Committed
Bug description:
qemu has recently grown a coroutines implementation. There are two
versions, one using the makecontext/setcontext/swapcontext functions
from ucontext.h, and one falling back to implementing coroutines as
separate glib threads. configure chooses the former if the platform
has a makecontext().
Unfortunately ARM eglibc provides a makecontext() which always fails
ENOSYS, which means the configure check passes but when qemu starts it
abort()s.
The best fix for this is probably going to involve making the
coroutine implementation runtime-selectable.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/883136/+subscriptions
^ permalink raw reply [flat|nested] 14+ messages in thread* [Qemu-devel] [Bug 883136] Re: qemu on ARM hosts aborts on startup because makecontext() always fails
[not found] <20111028150756.31559.33093.malonedeb@chaenomeles.canonical.com>
` (9 preceding siblings ...)
2012-03-06 19:39 ` Peter Maydell
@ 2012-03-06 19:40 ` Peter Maydell
2012-03-15 13:21 ` Peter Maydell
2012-07-10 14:58 ` Peter Maydell
12 siblings, 0 replies; 14+ messages in thread
From: Peter Maydell @ 2012-03-06 19:40 UTC (permalink / raw)
To: qemu-devel
...and I think that backporting would be a bug against some other
package, not qemu, so we can close this bug.
** Changed in: qemu-linaro
Status: In Progress => Fix Committed
** Changed in: qemu
Status: New => Fix Committed
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https://bugs.launchpad.net/bugs/883136
Title:
qemu on ARM hosts aborts on startup because makecontext() always fails
Status in QEMU:
Fix Committed
Status in Linaro QEMU:
Fix Committed
Bug description:
qemu has recently grown a coroutines implementation. There are two
versions, one using the makecontext/setcontext/swapcontext functions
from ucontext.h, and one falling back to implementing coroutines as
separate glib threads. configure chooses the former if the platform
has a makecontext().
Unfortunately ARM eglibc provides a makecontext() which always fails
ENOSYS, which means the configure check passes but when qemu starts it
abort()s.
The best fix for this is probably going to involve making the
coroutine implementation runtime-selectable.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/883136/+subscriptions
^ permalink raw reply [flat|nested] 14+ messages in thread* [Qemu-devel] [Bug 883136] Re: qemu on ARM hosts aborts on startup because makecontext() always fails
[not found] <20111028150756.31559.33093.malonedeb@chaenomeles.canonical.com>
` (10 preceding siblings ...)
2012-03-06 19:40 ` Peter Maydell
@ 2012-03-15 13:21 ` Peter Maydell
2012-07-10 14:58 ` Peter Maydell
12 siblings, 0 replies; 14+ messages in thread
From: Peter Maydell @ 2012-03-15 13:21 UTC (permalink / raw)
To: qemu-devel
** Changed in: qemu-linaro
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/883136
Title:
qemu on ARM hosts aborts on startup because makecontext() always fails
Status in QEMU:
Fix Committed
Status in Linaro QEMU:
Fix Released
Bug description:
qemu has recently grown a coroutines implementation. There are two
versions, one using the makecontext/setcontext/swapcontext functions
from ucontext.h, and one falling back to implementing coroutines as
separate glib threads. configure chooses the former if the platform
has a makecontext().
Unfortunately ARM eglibc provides a makecontext() which always fails
ENOSYS, which means the configure check passes but when qemu starts it
abort()s.
The best fix for this is probably going to involve making the
coroutine implementation runtime-selectable.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/883136/+subscriptions
^ permalink raw reply [flat|nested] 14+ messages in thread* [Qemu-devel] [Bug 883136] Re: qemu on ARM hosts aborts on startup because makecontext() always fails
[not found] <20111028150756.31559.33093.malonedeb@chaenomeles.canonical.com>
` (11 preceding siblings ...)
2012-03-15 13:21 ` Peter Maydell
@ 2012-07-10 14:58 ` Peter Maydell
12 siblings, 0 replies; 14+ messages in thread
From: Peter Maydell @ 2012-07-10 14:58 UTC (permalink / raw)
To: qemu-devel
Fix released in upstream QEMU 1.1.
** Changed in: qemu
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/883136
Title:
qemu on ARM hosts aborts on startup because makecontext() always fails
Status in QEMU:
Fix Released
Status in Linaro QEMU:
Fix Released
Bug description:
qemu has recently grown a coroutines implementation. There are two
versions, one using the makecontext/setcontext/swapcontext functions
from ucontext.h, and one falling back to implementing coroutines as
separate glib threads. configure chooses the former if the platform
has a makecontext().
Unfortunately ARM eglibc provides a makecontext() which always fails
ENOSYS, which means the configure check passes but when qemu starts it
abort()s.
The best fix for this is probably going to involve making the
coroutine implementation runtime-selectable.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/883136/+subscriptions
^ permalink raw reply [flat|nested] 14+ messages in thread