Ubuntu
apr package

apr cannot use shared process mutex on armv7

Bug #599874 reported by David Sugar
20
This bug affects 2 people
Affects Status Importance Assigned to Milestone
apr (Ubuntu)
Fix Released
Undecided
Unassigned

Bug Description

On armv7/thumb on Maverick, apr fails to build because it deadlocks in testing shared (interprocess) mutex locking. This feature likely depends on atomics behavior in glibc pthread spinlocks that is broken in thumb2. I have a simple patch that disables shared process mutexes for arm just like was needed for sh4.

Tags: armel armv7 thumb
Revision history for this message
David Sugar (dyfet-deactivatedaccount) wrote :

debdiff apr_1.4.2-3build1.dsc apr_1.4.2-3ubuntu1.dsc attached

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Loïc Minier (lool) wrote :

Could you open a bug against glibc and change your debdiff to only disable that when building for thumb?

Loïc Minier (lool)
tags: added: armel armv7
tags: added: thumb
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David Sugar (dyfet-deactivatedaccount) wrote :

Revised patch attached per Loic's request.

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David Sugar (dyfet-deactivatedaccount) wrote :

And cross-referenced for glibc in #604753

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Oliver Grawert (ogra) wrote :

is there any technical reason for the string change in that patch ?
if not, can you please remove it and update the debdiff ...

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David Sugar (dyfet-deactivatedaccount) wrote :

String change??? Could you elaborate?

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David Sugar (dyfet-deactivatedaccount) wrote :

Ah...I went back and made sure I had prestine build trees :)...

This is hopefully the final iteration...

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Loïc Minier (lool) wrote :

David, what's #463399 in the description of the patch? (DP:)

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David Sugar (dyfet-deactivatedaccount) wrote :

Loic, this is a newer diff with a patch description...

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Matthias Klose (doko) wrote :
Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package apr - 1.4.2-3ubuntu1

---------------
apr (1.4.2-3ubuntu1) maverick; urgency=low

  * Check for arm thumb mode to disable process shared mutexes. (LP: #599874)
 -- David Sugar <email address hidden> Tue, 17 Aug 2010 02:45:58 +0200

Changed in apr (Ubuntu):
status: New → Fix Released
Revision history for this message
Loïc Minier (lool) wrote :

I opened an apr task in bug #604753 as to remember reverting these apr changes once eglibc is fixed.

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