Mercurial > hg
view tests/test-dirstate-read-race.t @ 51656:21442f87f7fa stable
mmap: only use mmap to read revlog persistent nodemap if it is safe
Cf `is_mmap_safe` docstring.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Wed, 03 Jul 2024 12:32:57 +0200 |
parents | e6532a7336d0 |
children |
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============================================================================== Check potential race conditions between a dirstate's read and other operations ============================================================================== #testcases dirstate-v1 dirstate-v2-append dirstate-v2-rewrite #testcases pre-all-read pre-some-read Some commands, like `hg status`, do not need to take the wlock but need to access dirstate data. Other commands might update the dirstate data while this happens. This can create issues if repository data is read in the wrong order, or for the dirstate-v2 format where the data is contained in multiple files. This test file is meant to test various cases where such parallel operations happen and make sure the reading process behaves fine. We do so with a `hg status` command since it is probably the most advanced of such read-only command. It bears simililarity with `tests/test-dirstate-status-race.t ` but tests a different type of race. Setup ===== $ cat >> $HGRCPATH << EOF > [storage] > dirstate-v2.slow-path=allow > EOF #if no-dirstate-v1 $ cat >> $HGRCPATH << EOF > [format] > use-dirstate-v2=yes > EOF #else $ cat >> $HGRCPATH << EOF > [format] > use-dirstate-v2=no > EOF #endif #if dirstate-v2-rewrite $ d2args="--config devel.dirstate.v2.data_update_mode=force-new" #endif #if dirstate-v2-append $ d2args="--config devel.dirstate.v2.data_update_mode=force-append" #endif #if dirstate-v1 $ cfg="devel.sync.dirstate.pre-read-file" #else #if pre-all-read $ cfg="devel.sync.dirstate.pre-read-file" #else $ cfg="devel.sync.dirstate.post-docket-read-file" #endif #endif $ directories="dir dir/nested dir2" $ first_files="dir/nested/a dir/b dir/c dir/d dir2/e f" $ second_files="g dir/nested/h dir/i dir/j dir2/k dir2/l dir/nested/m" $ extra_files="dir/n dir/o p q" $ hg init reference-repo $ cd reference-repo $ mkdir -p dir/nested dir2 $ touch -t 200001010000 $first_files $directories $ hg commit -Aqm "recreate a bunch of files to facilitate dirstate-v2 append" $ touch -t 200001010010 $second_files $directories $ hg commit -Aqm "more files to have two commit" $ hg log -G -v @ changeset: 1:9a86dcbfb938 | tag: tip | user: test | date: Thu Jan 01 00:00:00 1970 +0000 | files: dir/i dir/j dir/nested/h dir/nested/m dir2/k dir2/l g | description: | more files to have two commit | | o changeset: 0:4f23db756b09 user: test date: Thu Jan 01 00:00:00 1970 +0000 files: dir/b dir/c dir/d dir/nested/a dir2/e f description: recreate a bunch of files to facilitate dirstate-v2 append $ hg manifest dir/b dir/c dir/d dir/i dir/j dir/nested/a dir/nested/h dir/nested/m dir2/e dir2/k dir2/l f g Add some unknown files and refresh the dirstate $ touch -t 200001010020 $extra_files $ hg add dir/o $ hg remove dir/nested/m $ hg st --config devel.dirstate.v2.data_update_mode=force-new A dir/o R dir/nested/m ? dir/n ? p ? q $ hg debugstate n 644 0 2000-01-01 00:00:00 dir/b n 644 0 2000-01-01 00:00:00 dir/c n 644 0 2000-01-01 00:00:00 dir/d n 644 0 2000-01-01 00:10:00 dir/i n 644 0 2000-01-01 00:10:00 dir/j n 644 0 2000-01-01 00:00:00 dir/nested/a n 644 0 2000-01-01 00:10:00 dir/nested/h r ?????????????????????????????????? dir/nested/m (glob) a ?????????????????????????????????? dir/o (glob) n 644 0 2000-01-01 00:00:00 dir2/e n 644 0 2000-01-01 00:10:00 dir2/k n 644 0 2000-01-01 00:10:00 dir2/l n 644 0 2000-01-01 00:00:00 f n 644 0 2000-01-01 00:10:00 g $ hg debugstate > ../reference $ cd .. Actual Testing ============== Race with a `hg add` ------------------- $ cp -a reference-repo race-with-add $ cd race-with-add spin a `hg status` with some caches to update $ hg st >$TESTTMP/status-race-lock.out 2>$TESTTMP/status-race-lock.log \ > --config rhg.on-unsupported=abort \ > --config ${cfg}=$TESTTMP/status-race-lock \ > & $ $RUNTESTDIR/testlib/wait-on-file 5 $TESTTMP/status-race-lock.waiting Add a file $ hg $d2args add dir/n $ touch $TESTTMP/status-race-lock $ wait The file should in a "added" state $ hg status A dir/n A dir/o R dir/nested/m ? p ? q The status process should return a consistent result and not crash. #if dirstate-v1 $ cat $TESTTMP/status-race-lock.out A dir/n A dir/o R dir/nested/m ? p ? q #else #if rhg pre-some-read dirstate-v2-append $ cat $TESTTMP/status-race-lock.out A dir/o R dir/nested/m ? dir/n ? p ? q #else #if rust no-rhg dirstate-v2-append $ cat $TESTTMP/status-race-lock.out A dir/o R dir/nested/m ? dir/n ? p ? q #else $ cat $TESTTMP/status-race-lock.out A dir/n A dir/o R dir/nested/m ? p ? q #endif #endif #endif $ cat $TESTTMP/status-race-lock.log final cleanup $ rm $TESTTMP/status-race-lock $TESTTMP/status-race-lock.waiting $ cd .. Race with a `hg commit` ----------------------- $ cp -a reference-repo race-with-commit $ cd race-with-commit spin a `hg status with some cache to update $ hg st >$TESTTMP/status-race-lock.out 2>$TESTTMP/status-race-lock.log \ > --config rhg.on-unsupported=abort \ > --config ${cfg}=$TESTTMP/status-race-lock \ > & $ $RUNTESTDIR/testlib/wait-on-file 5 $TESTTMP/status-race-lock.waiting Add a do a commit $ hg status A dir/o R dir/nested/m ? dir/n ? p ? q $ hg $d2args commit -m 'racing commit' $ touch $TESTTMP/status-race-lock $ wait commit was created, and status is now clean $ hg log -GT '{node|short} {desc}\n' @ 02a67a77ee9b racing commit | o 9a86dcbfb938 more files to have two commit | o 4f23db756b09 recreate a bunch of files to facilitate dirstate-v2 append $ hg status ? dir/n ? p ? q The status process should return a consistent result and not crash. #if no-rhg $ cat $TESTTMP/status-race-lock.out A dir/o R dir/nested/m ? dir/n ? p ? q $ cat $TESTTMP/status-race-lock.log #else #if pre-some-read dirstate-v2-append $ cat $TESTTMP/status-race-lock.out A dir/o R dir/nested/m ? dir/n ? p ? q $ cat $TESTTMP/status-race-lock.log #else $ cat $TESTTMP/status-race-lock.out ? dir/n ? p ? q $ cat $TESTTMP/status-race-lock.log #endif #endif final cleanup $ rm $TESTTMP/status-race-lock $TESTTMP/status-race-lock.waiting $ cd .. Race with a `hg update` ----------------------- $ cp -a reference-repo race-with-update $ cd race-with-update spin a `hg status` with some caches to update $ hg st >$TESTTMP/status-race-lock.out 2>$TESTTMP/status-race-lock.log \ > --config rhg.on-unsupported=abort \ > --config ${cfg}=$TESTTMP/status-race-lock \ > & $ $RUNTESTDIR/testlib/wait-on-file 5 $TESTTMP/status-race-lock.waiting do an update $ hg status A dir/o R dir/nested/m ? dir/n ? p ? q $ hg log -GT '{node|short} {desc}\n' @ 9a86dcbfb938 more files to have two commit | o 4f23db756b09 recreate a bunch of files to facilitate dirstate-v2 append $ hg $d2args update --merge ".~1" 0 files updated, 0 files merged, 6 files removed, 0 files unresolved $ touch $TESTTMP/status-race-lock $ wait $ hg log -GT '{node|short} {desc}\n' o 9a86dcbfb938 more files to have two commit | @ 4f23db756b09 recreate a bunch of files to facilitate dirstate-v2 append $ hg status A dir/o ? dir/n ? p ? q The status process should return a consistent result and not crash. #if rhg dirstate-v2-append pre-some-read $ cat $TESTTMP/status-race-lock.out A dir/o R dir/nested/m ! dir/i ! dir/j ! dir/nested/h ! dir2/k ! dir2/l ! g ? dir/n ? p ? q #else #if rust no-rhg dirstate-v2-append $ cat $TESTTMP/status-race-lock.out A dir/o R dir/nested/m ! dir/i ! dir/j ! dir/nested/h ! dir2/k ! dir2/l ! g ? dir/n ? p ? q #else $ cat $TESTTMP/status-race-lock.out A dir/o ? dir/n ? p ? q #endif #endif $ cat $TESTTMP/status-race-lock.log final cleanup $ rm $TESTTMP/status-race-lock $TESTTMP/status-race-lock.waiting $ cd .. Race with a cache updating `hg status` -------------------------------------- It is interesting to race with "read-only" operation (that still update its cache) $ cp -a reference-repo race-with-status $ cd race-with-status spin a `hg status` with some caches to update $ hg st >$TESTTMP/status-race-lock.out 2>$TESTTMP/status-race-lock.log \ > --config rhg.on-unsupported=abort \ > --config ${cfg}=$TESTTMP/status-race-lock \ > & $ $RUNTESTDIR/testlib/wait-on-file 5 $TESTTMP/status-race-lock.waiting do an update $ touch -t 200001020006 f $ hg $d2args status A dir/o R dir/nested/m ? dir/n ? p ? q $ touch $TESTTMP/status-race-lock $ wait The status process should return a consistent result and not crash. $ cat $TESTTMP/status-race-lock.out A dir/o R dir/nested/m ? dir/n ? p ? q $ cat $TESTTMP/status-race-lock.log final cleanup $ rm $TESTTMP/status-race-lock $TESTTMP/status-race-lock.waiting $ cd ..