Mercurial > hg
view tests/test-racy-mutations.t @ 47682:78f7f0d490ee
dirstate-v2: Move fixed-size tree metadata into the docket file
Before this changeset, the dirstate-v2 data file contained not only nodes
and paths that may be reused when appending to an existing file,
but also some fixed-size metadata that applies to the entire tree
and was added at the end of the data file for every append.
This moves that metadata into the docket file, so that repeated "append"
operations without meaningful changes don’t actually need to grow any file.
Differential Revision: https://phab.mercurial-scm.org/D11098
author | Simon Sapin <simon.sapin@octobus.net> |
---|---|
date | Thu, 15 Jul 2021 23:02:17 +0200 |
parents | 906a7bcaac86 |
children | bd752712ccaf |
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#testcases skip-detection fail-if-detected Test situations that "should" only be reproducible: - on networked filesystems, or - user using `hg debuglocks` to eliminate the lock file, or - something (that doesn't respect the lock file) writing to the .hg directory while we're running $ hg init a $ cd a $ cat > "$TESTTMP/waitlock_editor.sh" <<EOF > [ -n "\${WAITLOCK_ANNOUNCE:-}" ] && touch "\${WAITLOCK_ANNOUNCE}" > f="\${WAITLOCK_FILE}" > start=\`date +%s\` > timeout=5 > while [ \\( ! -f \$f \\) -a \\( ! -L \$f \\) ]; do > now=\`date +%s\` > if [ "\`expr \$now - \$start\`" -gt \$timeout ]; then > echo "timeout: \$f was not created in \$timeout seconds (it is now \$(date +%s))" > exit 1 > fi > sleep 0.1 > done > if [ \$# -gt 1 ]; then > cat "\$@" > fi > EOF Things behave differently if we don't already have a 00changelog.i file when this all starts, so let's make one. $ echo r0 > r0 $ hg commit -qAm 'r0' Start an hg commit that will take a while $ EDITOR_STARTED="$(pwd)/.editor_started" $ MISCHIEF_MANAGED="$(pwd)/.mischief_managed" $ JOBS_FINISHED="$(pwd)/.jobs_finished" #if fail-if-detected $ cat >> .hg/hgrc << EOF > [debug] > revlog.verifyposition.changelog = fail > EOF #endif $ echo foo > foo $ (WAITLOCK_ANNOUNCE="${EDITOR_STARTED}" \ > WAITLOCK_FILE="${MISCHIEF_MANAGED}" \ > HGEDITOR="sh $TESTTMP/waitlock_editor.sh" \ > hg commit -qAm 'r1 (foo)' --edit foo > .foo_commit_out 2>&1 ; touch "${JOBS_FINISHED}") & Wait for the "editor" to actually start $ WAITLOCK_FILE="${EDITOR_STARTED}" sh "$TESTTMP/waitlock_editor.sh" Break the locks, and make another commit. $ hg debuglocks -LW $ echo bar > bar $ hg commit -qAm 'r2 (bar)' bar $ hg debugrevlogindex -c rev linkrev nodeid p1 p2 0 0 222799e2f90b 000000000000 000000000000 1 1 6f124f6007a0 222799e2f90b 000000000000 Awaken the editor from that first commit $ touch "${MISCHIEF_MANAGED}" And wait for it to finish $ WAITLOCK_FILE="${JOBS_FINISHED}" sh "$TESTTMP/waitlock_editor.sh" #if skip-detection (Ensure there was no output) $ cat .foo_commit_out And observe a corrupted repository -- rev 2's linkrev is 1, which should never happen for the changelog (the linkrev should always refer to itself). $ hg debugrevlogindex -c rev linkrev nodeid p1 p2 0 0 222799e2f90b 000000000000 000000000000 1 1 6f124f6007a0 222799e2f90b 000000000000 2 1 ac80e6205bb2 222799e2f90b 000000000000 #endif #if fail-if-detected $ cat .foo_commit_out transaction abort! rollback completed note: commit message saved in .hg/last-message.txt note: use 'hg commit --logfile .hg/last-message.txt --edit' to reuse it abort: 00changelog.i: file cursor at position 249, expected 121 And no corruption in the changelog. $ hg debugrevlogindex -c rev linkrev nodeid p1 p2 0 0 222799e2f90b 000000000000 000000000000 1 1 6f124f6007a0 222799e2f90b 000000000000 (missing-correct-output !) And, because of transactions, there's none in the manifestlog either. $ hg debugrevlogindex -m rev linkrev nodeid p1 p2 0 0 7b7020262a56 000000000000 000000000000 1 1 ad3fe36d86d9 7b7020262a56 000000000000 #endif