[Bug 2101149] Re: [SRU] Set default file_bigendian in struct tep_handle

[Timo Aaltonen]

*** This bug is a duplicate of bug 2062118 ***
    https://bugs.launchpad.net/bugs/2062118

Hello Pragyansh, or anyone else affected,

Accepted libtraceevent into oracular-proposed. The package will build
now and be available at
https://launchpad.net/ubuntu/+source/libtraceevent/1:1.8.2-1ubuntu3.1 in
a few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, what testing has been
performed on the package and change the tag from verification-needed-
oracular to verification-done-oracular. If it does not fix the bug for
you, please add a comment stating that, and change the tag to
verification-failed-oracular. In either case, without details of your
testing we will not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** This bug has been marked a duplicate of bug 2062118
   autopkgtests fail on s390x (segfault)

** Changed in: libtraceevent (Ubuntu Oracular)
       Status: New => Fix Committed

** Tags added: verification-needed verification-needed-oracular

** Changed in: libtraceevent (Ubuntu Noble)
       Status: New => Fix Committed

** Tags added: verification-needed-noble

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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 Committed
Status in libtraceevent source package in Oracular:
  Fix Committed

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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