Augie Fackler <augie@google.com> [Wed, 09 Oct 2019 20:49:39 -0700] rev 43152
fuzz: new fuzzer for fncache-related functions
Not all of these are strictly fncache-related, but they all have th
same signature and similar-enough behavior that we may as well fuzz
them together. No obvious bugs for once, but these felt like they were
just complicated enough to cover.
Differential Revision: https://phab.mercurial-scm.org/D7033
Augie Fackler <augie@google.com> [Wed, 09 Oct 2019 20:49:23 -0700] rev 43151
fuzz: exercise a little more revlog code
Differential Revision: https://phab.mercurial-scm.org/D7032
Augie Fackler <augie@google.com> [Wed, 09 Oct 2019 20:48:12 -0700] rev 43150
fuzz: new fuzzer for dirs.c
This found a six-year-old bug immediately, and then I put it through a
few CPU-days of time before sending it.
Differential Revision: https://phab.mercurial-scm.org/D7031
Augie Fackler <augie@google.com> [Tue, 08 Oct 2019 16:18:15 -0400] rev 43149
dirs: fix trivial over-read of input data
This code, introduced in
8c0a7eeda06d, was intentionally over-reading
an input string to avoid getting a shared string object for a one-byte
input. Unfortunately with an empty input (like in the case of a fuzzer
getting started) this was a trivial over-read and triggered an
AddressSanitizer failure.
I went out of my way to make sure the code still does the
copy-avoidance tricks. I don't think this change will cost us much
performance since the one-character strings should be cached
aggressively anyway.
Differential Revision: https://phab.mercurial-scm.org/D7030
Pierre-Yves David <pierre-yves.david@octobus.net> [Sun, 06 Oct 2019 23:36:52 -0400] rev 43148
sidedatacopies: deal with upgrading and downgrading to that format
This is quite useful to test this on real life data.
Differential Revision: https://phab.mercurial-scm.org/D6955
Pierre-Yves David <pierre-yves.david@octobus.net> [Sun, 06 Oct 2019 23:36:51 -0400] rev 43147
sidedatacopies: move various copies related function to the copies modules
We will need to access these logic form the copies module. So we move them from
their higher level module to the lower level `copies` module. We cannot use them
from their top level module as it would create cycles.
Differential Revision: https://phab.mercurial-scm.org/D6954
Pierre-Yves David <pierre-yves.david@octobus.net> [Wed, 09 Oct 2019 22:59:38 +0200] rev 43146
sidedatacopies: read rename information from sidedata
Repository using the new format now use changeset centric algorithm and read the
copies information from the changelog sidedata.
Differential Revision: https://phab.mercurial-scm.org/D6953
Pierre-Yves David <pierre-yves.david@octobus.net> [Thu, 10 Oct 2019 00:06:41 +0200] rev 43145
changelog: make copies related function return None or a valid value
With the previous code, existing but empty value were not "decoded", leading to
the method returning one of `None`, some valid value (`list` or `dict`) or
`b''`.
On a general basis, not explicitly checking for None is a source of bugs.
Having a clean return types will help the side-data copies code in future
changesets.
Differential Revision: https://phab.mercurial-scm.org/D7037
Pierre-Yves David <pierre-yves.david@octobus.net> [Thu, 10 Oct 2019 00:01:40 +0200] rev 43144
test: fix zstd related output in pure tests
Differential Revision: https://phab.mercurial-scm.org/D7036
Pierre-Yves David <pierre-yves.david@octobus.net> [Sun, 06 Oct 2019 23:36:51 -0400] rev 43143
sidedatacopies: get and store sidedata in the changelogrevision object
The object provide a simple way to access changelog entry, we need it to also
bear the sidedata value.
Since the sidedata are retrieved at the same time as the revision, we can do
that without extra cost.
Differential Revision: https://phab.mercurial-scm.org/D6951