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Add support for running units tests with valgrind. #185

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Leverage the Autoconf Archive macro AX_VALGRIND_CHECK to enable support for running the mptcpd unit tests through valgrind, e.g.:

    ./configure --enable-valgrind
    make check-valgrind

@ossama-othman ossama-othman added the enhancement New feature or request label Dec 6, 2021
@ossama-othman ossama-othman added this to the Q4-2021 milestone Dec 6, 2021
@ossama-othman ossama-othman added this to In progress in mptcpd 0.9 via automation Dec 6, 2021
@ossama-othman ossama-othman self-assigned this Dec 6, 2021
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coveralls commented Dec 6, 2021

Pull Request Test Coverage Report for Build 1831551729

  • 0 of 0 changed or added relevant lines in 0 files are covered.
  • No unchanged relevant lines lost coverage.
  • Overall coverage remained the same at 53.266%

Totals Coverage Status
Change from base Build 1790578941: 0.0%
Covered Lines: 1060
Relevant Lines: 1990

💛 - Coveralls

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The Valgrind build is failing because of legitimate memory leaks in two unit tests. The changes are behaving as expected.

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While I knew you had submitted the fix for autoconf archive, I still got stuck trying to build and run on my local system until I looked through the workflow and saw that it's downloading your not-yet-merged changes :) By following the sequence of commands in valgrind.yml I was able to successfully run "make check-valgrind" on Fedora 34, with the expected two memcheck failures.

It would definitely help to document that autoconf dependency!

Does autoconf give any way to check the serial number of the m4 file? If someone decides to try out this feature it would be good to provide some information, since it will take a while (years?) for the autoconf-archive fix to show up in distros.

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It would definitely help to document that autoconf dependency!

Good point. It's really only needed if someone is building mptcpd from a git repository or is modifying the autoconf/automake files shipped with the mptcpd tar archive. A mptcpd tar archive created through make dist or make distcheck doesn't have this issue since the macro content is placed into the generated configure script shipped with the tar archive. This assumes that the person that created the tar archive had the updated AX_VALGRIND_CHECK macro installed when creating it.

Does autoconf give any way to check the serial number of the m4 file? If someone decides to try out this feature it would be good to provide some information, since it will take a while (years?) for the autoconf-archive fix to show up in distros.

The Automake manual mentions that the aclocal Perl script take into account the serial number when deciding which copy of a M4 file to use, but I'm not aware of any features in Autoconf or Automake that would allow one to check the serial number. We'd likely have to roll our own serial check.

@ossama-othman ossama-othman force-pushed the valgrind-check branch 2 times, most recently from db87790 to cc5ffa5 Compare January 6, 2022 21:30
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@ossama-othman ossama-othman removed this from In progress in mptcpd 0.9 Feb 1, 2022
@ossama-othman ossama-othman added this to In progress in mptcpd 0.10 via automation Feb 1, 2022
@ossama-othman ossama-othman modified the milestones: Q4-2021, Q1-2022 Feb 1, 2022
Leverage the Autoconf Archive macro AX_VALGRIND_CHECK to enable
support for running the mptcpd unit tests through valgrind, e.g.:

./configure --enable-valgrind
make check-valgrind
Add an explicit rule in tests/lib/Makefile.am to build `libmptcpd.la'
to allow `make check-valgrind' to be performed without first running
`make' (i.e. `make all').
The GitHub pull request (autoconf-archive/autoconf-archive#242) that
contains the AX_VALGRIND_CHECK GNU Autoconf Archive macro recursive
`make' target fixes has been merged to the master development branch,
and is now part of the v2022.02.11 release.  Update the URL for the
patched `ax_valgrind_check.m4' file accordingly.
Instead of modifying the `configure.ac' file, issue a warning that
"make check-valgrind" may not work properly.  This prevents changes to
the `configure.ac' caused by the `bootstrap' script from being
inadvertently committed to a git repository.
Running `wget' on the GITWEB based URL caused a HTML page to be
downloaded instead of the plain text `ax_valgrind.check.m4' file.  Use
the CGIT based URL instead.
@ossama-othman ossama-othman marked this pull request as ready for review February 11, 2022 21:17
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I should probably bump the copyright year on the modified files.

echo Patched AX_VALGRIND_CHECK GNU Autoconf Archive macro not found.
echo -n "Attempting to download patched ax_valgrind_check.m4... "
cd m4
wget --quiet --timeout 10 http://git.savannah.gnu.org/cgit/autoconf-archive.git/plain/m4/ax_valgrind_check.m4
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Perhaps it would be better to make the download optional and switched off by default.

@ossama-othman ossama-othman marked this pull request as draft February 14, 2022 02:34
@ossama-othman ossama-othman removed this from In progress in mptcpd 0.10 Jun 27, 2022
@ossama-othman ossama-othman added this to In progress in mptcpd 0.11 via automation Jun 27, 2022
@ossama-othman ossama-othman removed this from In progress in mptcpd 0.11 Jan 23, 2023
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3 participants