*** This bug is a duplicate of bug 2062118 ***
https://bugs.launchpad.net/bugs/2062118
This bug was fixed in the package libtraceevent - 1:1.8.2-1ubuntu2.1
---------------
libtraceevent (1:1.8.2-1ubuntu2.1) noble; urgency=medium
* Set default file_bigendian in struct tep_handle
- d/p/0004-fix-file-endianness.patch: make file_bigendian the same
as host_bignendian in tep_alloc() (LP: #2062118), (LP: #2101149)
-- Pragyansh Chaturvedi <[email protected]> Fri, 07
Mar 2025 18:47:32 +0530
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https://bugs.launchpad.net/bugs/2101149
Title:
[SRU] Set default file_bigendian in struct tep_handle
Status in libtraceevent package in Ubuntu:
In Progress
Status in libtraceevent source package in Noble:
Fix Released
Status in libtraceevent source package in Oracular:
Fix Released
Bug description:
[ Impact ]
* This relates to
https://bugs.launchpad.net/ubuntu/+source/libtracefs/+bug/2062118.
The failures on s390x are primarily because tep_alloc sets file
endianness to LITTLE_ENDIAN by default (with no checks)
* The changes are already accepted into plucky and upstream:
https://code.launchpad.net/~r41k0u/ubuntu/+source/libtraceevent/+git/libtraceevent/+merge/477042
* This will fix autopkgtest segfaults of libtracefs on oracular and
noble for s390x.
[ Test Plan ]
* Clone libtracefs (oracular-devel or noble-devel), compile it and the tests
(make && make test),
then run the tests as root (utest/trace-utest), on an s390x machine
(running oracular or noble)
* You can test the fix by installing the patched version of libtraceevent
for the release you are
testing and trying the libtracefs tests again.
[ Where problems could occur ]
* This is not likely to break anything, as we can make a safe assumption
to set file_bigendian to the same value as host_bigendian by default.
If these are different, the user can set it using event-parse-api
* In any case, this change seems logical. This does not affect any other
little-endian architectures, and I think this won't be breaking any
workarounds
people did around this problem.
* But in case we have some regressions as a result of this change, then
there surely would
be some workaround to this in a patch, which can then be reverted.
[ Other Info ]
* This does not fix anything in libtraceevent but does fix the tests for
libtracefs on s390x.
But I have opened this bug against libtraceevent.
* I see a workaround around this problem in the last patch in d/p/series,
but this change does not affect
it
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