[Bug 1908307] Autopkgtest regression report (glibc/2.32-0ubuntu3.2)

[Ubuntu SRU Bot]

All autopkgtests for the newly accepted glibc (2.32-0ubuntu3.2) for groovy have finished running.
The following regressions have been reported in tests triggered by the package:

cyrus-imapd/3.2.3-2ubuntu1 (armhf)
pyqt5/5.15.0+dfsg-1 (s390x)
libsass/3.6.4-3 (s390x)
network-manager/1.26.2-1ubuntu1 (arm64)
reprotest/0.7.15 (s390x)
flatpak/1.8.2-1ubuntu0.1 (arm64)
puma/3.12.4-1ubuntu2 (arm64, s390x)
libtext-charwidth-perl/0.04-10 (ppc64el)
systemd/246.6-1ubuntu1.3 (arm64)
taptempo/1.4.5-1 (arm64)
uftrace/0.9.3-1ubuntu1 (arm64)
libgdata/0.17.12-1 (armhf)
cysignals/1.10.2+ds-4 (amd64)
hyphy/2.5.1+dfsg-3build1 (amd64)
glibc/2.32-0ubuntu3.2 (amd64)
libdate-simple-perl/3.0300-3 (arm64)
netplan.io/0.101-0ubuntu3~20.10.1 (amd64)
libastro-fits-cfitsio-perl/1.14-1 (ppc64el)
fwlogwatch/1.4-2 (arm64)
pandas/1.0.5+dfsg-3 (ppc64el, armhf, s390x, amd64, arm64)
rhonabwy/0.9.12-2build1 (s390x)
jailkit/2.21-2 (ppc64el)
openjdk-lts/11.0.10+9-0ubuntu1~20.10 (s390x)
dbus/1.12.20-1ubuntu1 (arm64)
pymca/5.5.5+dfsg-2build2 (arm64)
euslisp/9.27+dfsg-6 (armhf, amd64)
libflame/5.2.0-2 (amd64)
samtools/1.10-4 (arm64)
syncthing/1.10.0~ds1-1 (amd64, s390x)
endlessh/1.1-4 (armhf)
r-cran-amore/0.2-16-1build1 (ppc64el)
crrcsim/0.9.13-3.2build1 (ppc64el)
samplv1/0.9.17-1 (ppc64el)
hugo/0.74.3-1 (armhf)
libcsfml/2.5-1build1 (ppc64el)
firefox/87.0+build3-0ubuntu0.20.10.1 (armhf)
etcd/3.2.26+dfsg-8 (amd64)
libnxml/0.18.3-8 (s390x)
google-osconfig-agent/20210219.00-0ubuntu1~20.10.0 (armhf)
combblas/1.6.2-5build1 (arm64)
libbio-db-hts-perl/3.01-3 (amd64)
libterm-readkey-perl/2.38-1build1 (s390x)
ruby2.7/2.7.1-3ubuntu1.2 (armhf)
hkl/5.0.0.2620-1build1 (ppc64el)
liblinux-inotify2-perl/1:2.2-2 (ppc64el)
datefudge/1.24 (ppc64el)
libpgplot-perl/1:2.24-1build1 (s390x)
healpy/1.14.0-1 (arm64)
udisks2/2.9.1-2ubuntu1 (amd64)
kopanocore/8.7.0-7ubuntu4 (arm64)
gyoto/1.4.4-3build1 (s390x)
cpdb-libs/1.2.0-0ubuntu8 (armhf)
ruby-concurrent/1.1.6+dfsg-3 (amd64)
postgis/3.0.2+dfsg-2ubuntu2 (armhf)


Please visit the excuses page listed below and investigate the failures, proceeding afterwards as per the StableReleaseUpdates policy regarding autopkgtest regressions [1].

https://people.canonical.com/~ubuntu-archive/proposed-
migration/groovy/update_excuses.html#glibc

[1] https://wiki.ubuntu.com/StableReleaseUpdates#Autopkgtest_Regressions

Thank you!

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Foundations Bugs, which is subscribed to glibc in Ubuntu.
https://bugs.launchpad.net/bugs/1908307

Title:
  Please ship a glibc build for profiling in libc6-prof

Status in glibc package in Ubuntu:
  Fix Released
Status in glibc source package in Focal:
  Fix Released
Status in glibc source package in Groovy:
  Fix Committed

Bug description:
  [Impact]

  * The C library shipped in libc6 is built with GCC's default behavior
  of omitting the frame pointer that makes tracing and profiling harder.
  Building GLibc with -fno-omit-frame-pointer and shipping it in an
  optional libc6-prof binary package would help tracing and profiling
  efforts.

  [Test Case]

  * Install libc6-prof and start tracing in one shell:

    sudo bpftrace -e 't:syscalls:sys_enter_clock_nanosleep /comm == "sleep"/ {printf("%s\n", ustack);}'
    Attaching 1 probe...

          clock_nanosleep+94
          __nanosleep+23
          0x5652a2e6b827

  * Run the traced program in a different shell
   env LD_LIBRARY_PATH=/lib/libc6-prof/x86_64-linux-gnu sleep 1

  
  * Repeat it without using the libc6-prof library:


   ubuntu at ff-glibc:~$ sleep 1

   ubuntu at ff-glibc:~$ sudo bpftrace -e 't:syscalls:sys_enter_clock_nanosleep /comm == "sleep"/ {printf("%s\n", ustack); }'
   Attaching 1 probe...

          clock_nanosleep+84

  [ Where problems could occur ]

  * Glibc does not build for some architectures with the additional -fno-omit-frame-pointer option which is tracked in LP: #1898049.
  * The -fno-omit-frame-pointer option may sneak in to the regular build, this is convered in the test case.
  * Libc6-prof may be slower thanks to the -fno-omit-frame-pointer option, this is expected and this is the reason for shipping it in a separate package.

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