[Bug 1908307] Autopkgtest regression report (glibc/2.32-0ubuntu3.1)

[Ubuntu SRU Bot]

All autopkgtests for the newly accepted glibc (2.32-0ubuntu3.1) for groovy have finished running.
The following regressions have been reported in tests triggered by the package:

snapd-glib/1.58-0ubuntu0.20.10.0 (armhf)
libcompress-raw-bzip2-perl/unknown (armhf)
node-ws/7.3.0+~cs24.0.3-1build1 (s390x, armhf, ppc64el, amd64, arm64)
austin/unknown (armhf)
r-bioc-rhdf5lib/1.10.1+dfsg-1 (armhf)
tup/0.7.8-3 (arm64)
r-cran-seurat/unknown (armhf)
python-pomegranate/unknown (armhf)
ruby-mysql2/0.5.2-1ubuntu3 (armhf)
libdevel-cover-perl/1.36-1build1 (armhf)
undbx/unknown (armhf)
libtime-warp-perl/0.54-1build1 (ppc64el)
statsprocessor/unknown (armhf)
pycurl/7.43.0.2-7 (armhf)
libhash-fieldhash-perl/unknown (armhf)
reprotest/0.7.15 (s390x)
r-cran-httpuv/1.5.4+dfsg-1 (armhf)
libosinfo/unknown (armhf)
r-cran-batchtools/unknown (armhf)
chiark-tcl/1.3.4ubuntu3 (armhf)
libdbd-mariadb-perl/1.11-3ubuntu2 (s390x, ppc64el, amd64, arm64)
firefox/84.0+build3-0ubuntu0.20.10.1 (arm64)
hilive/2.0a-3build2 (amd64)
etcd/3.2.26+dfsg-8 (amd64)
libdbd-mariadb-perl/unknown (armhf)
prometheus/unknown (armhf)
libticonv/unknown (armhf)
notary/0.6.1~ds2-6 (armhf)
firebird3.0/unknown (armhf)
burrow/unknown (armhf)
ruby-stackprof/0.2.15-2 (arm64)
gnutls28/3.6.15-4ubuntu2 (i386, amd64, s390x, arm64, ppc64el, armhf)
postgresql-plproxy/2.9-2 (armhf)
librg-blast-parser-perl/0.03-6build2 (armhf)
binutils/2.35.1-1ubuntu1 (armhf)
clutter-1.0/1.26.4+dfsg-1 (arm64)
transtermhp/2.09-5 (armhf)
genext2fs/1.5.0-1 (s390x)
python-cmarkgfm/unknown (armhf)
libpff/20180714-2 (s390x, armhf, ppc64el, amd64, arm64)
debsig-verify/unknown (armhf)
bosh/unknown (armhf)
casync/2+20190213-1 (amd64)
golang-github-spf13-cobra/unknown (armhf)
tpm2-tools/unknown (armhf)
umockdev/0.14.3-1 (armhf)
crrcsim/unknown (armhf)
postgis/3.0.2+dfsg-2ubuntu2 (amd64)
r-cran-proc/unknown (armhf)
mercurial/5.5.1-1 (armhf)
r-cran-dqrng/unknown (armhf)
frobby/unknown (armhf)
libcrypt-cast5-perl/unknown (armhf)
drumkv1/0.9.17-1 (ppc64el)
nsf/unknown (armhf)
python3-lxc/1:3.0.4-1ubuntu6 (s390x)
hyphy/2.5.1+dfsg-3build1 (amd64)
fatrace/0.16-1 (arm64)
bio-rainbow/unknown (armhf)
python-fabio/0.10.2+dfsg-2 (armhf)
hhsuite/3.2.0-3 (amd64)
libperlio-layers-perl/0.012-1 (armhf)
postgresql-common/unknown (armhf)
menhir/20200624-1 (s390x)
notify-osd/0.9.35+20.04.20191129-0ubuntu1 (ppc64el)
r-cran-xfun/unknown (armhf)
gifsicle/1.92-2 (armhf)
libunix-processors-perl/unknown (armhf)
freebayes/unknown (armhf)
alertmanager-irc-relay/0.1.0-3 (arm64)


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!

-- 
You received this bug notification because you are a member of Ubuntu
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 Committed
Status in glibc source package in Focal:
  Fix Committed
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.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1908307/+subscriptions