mirror of
https://github.com/facebook/sapling.git
synced 2024-10-11 17:27:53 +03:00
9740116626
Summary: We recently ran into issues with locks in pid namespaces [1]. Let's fix that by using flock. flock is more reliable in Linux's pid namespace use-case than file-existence test, because it works without a /proc filesystem and does not have deadlock issue if an hg process is killed unexpectedly (ex. OOM or SIGKILL). The transition should be transparent: - If the new code saw a symlink lock file generated by the old code. `open(..., O_NOFOLLOW)` will fail and it's considered lock taken by the old process correctly. - If the old code saw a new lock file. It will treat it as system without symlink support and it's considered lock taken by the new process correctly. A non-symlink stale lock (regardless of whether it contains pid information or not) will be confidently removed automatically by the new code. The change is complicated because it works when both new and old hg run at the same time. If we have migrated most users to the new code path, the code can be cleaned up significantly. [1]: https://fburl.com/85fxjisi Reviewed By: DurhamG Differential Revision: D9004614 fbshipit-source-id: d501c4f3a7bc8ad73c9556be1c6a265ffd0d0686
238 lines
6.7 KiB
Raku
238 lines
6.7 KiB
Raku
$ cat << EOF >> $HGRCPATH
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> [ui]
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> interactive=yes
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> [format]
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> usegeneraldelta=yes
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> EOF
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$ hg init debugrevlog
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$ cd debugrevlog
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$ echo a > a
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$ hg ci -Am adda
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adding a
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$ hg debugrevlog -m
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format : 1
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flags : inline, generaldelta
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revisions : 1
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merges : 0 ( 0.00%)
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normal : 1 (100.00%)
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revisions : 1
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full : 1 (100.00%)
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deltas : 0 ( 0.00%)
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revision size : 44
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full : 44 (100.00%)
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deltas : 0 ( 0.00%)
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chunks : 1
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0x75 (u) : 1 (100.00%)
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chunks size : 44
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0x75 (u) : 44 (100.00%)
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avg chain length : 0
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max chain length : 0
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max chain reach : 44
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compression ratio : 0
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uncompressed data size (min/max/avg) : 43 / 43 / 43
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full revision size (min/max/avg) : 44 / 44 / 44
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delta size (min/max/avg) : 0 / 0 / 0
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Test debugindex, with and without the --debug flag
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$ hg debugindex a
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rev offset length ..... linkrev nodeid p1 p2 (re)
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0 0 3 .... 0 b789fdd96dc2 000000000000 000000000000 (re)
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$ hg --debug debugindex a
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rev offset length ..... linkrev nodeid p1 p2 (re)
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0 0 3 .... 0 b789fdd96dc2f3bd229c1dd8eedf0fc60e2b68e3 0000000000000000000000000000000000000000 0000000000000000000000000000000000000000 (re)
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$ hg debugindex -f 1 a
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rev flag offset length size ..... link p1 p2 nodeid (re)
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0 0000 0 3 2 .... 0 -1 -1 b789fdd96dc2 (re)
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$ hg --debug debugindex -f 1 a
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rev flag offset length size ..... link p1 p2 nodeid (re)
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0 0000 0 3 2 .... 0 -1 -1 b789fdd96dc2f3bd229c1dd8eedf0fc60e2b68e3 (re)
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debugdelta chain basic output
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$ hg debugdeltachain -m
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rev chain# chainlen prev delta size rawsize chainsize ratio lindist extradist extraratio
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0 1 1 -1 base 44 43 44 1.02326 44 0 0.00000
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$ hg debugdeltachain -m -T '{rev} {chainid} {chainlen}\n'
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0 1 1
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$ hg debugdeltachain -m -Tjson
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[
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{
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"chainid": 1,
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"chainlen": 1,
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"chainratio": 1.02325581395,
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"chainsize": 44,
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"compsize": 44,
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"deltatype": "base",
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"extradist": 0,
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"extraratio": 0.0,
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"lindist": 44,
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"prevrev": -1,
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"rev": 0,
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"uncompsize": 43
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}
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]
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debugdelta chain with sparse read enabled
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$ cat >> $HGRCPATH <<EOF
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> [experimental]
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> sparse-read = True
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> EOF
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$ hg debugdeltachain -m
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rev chain# chainlen prev delta size rawsize chainsize ratio lindist extradist extraratio readsize largestblk rddensity
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0 1 1 -1 base 44 43 44 1.02326 44 0 0.00000 44 44 1.00000
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$ hg debugdeltachain -m -T '{rev} {chainid} {chainlen} {readsize} {largestblock} {readdensity}\n'
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0 1 1 44 44 1.0
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$ hg debugdeltachain -m -Tjson
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[
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{
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"chainid": 1,
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"chainlen": 1,
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"chainratio": 1.02325581395,
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"chainsize": 44,
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"compsize": 44,
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"deltatype": "base",
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"extradist": 0,
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"extraratio": 0.0,
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"largestblock": 44,
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"lindist": 44,
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"prevrev": -1,
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"readdensity": 1.0,
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"readsize": 44,
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"rev": 0,
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"uncompsize": 43
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}
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]
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Test max chain len
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$ cat >> $HGRCPATH << EOF
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> [format]
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> maxchainlen=4
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> EOF
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$ printf "This test checks if maxchainlen config value is respected also it can serve as basic test for debugrevlog -d <file>.\n" >> a
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$ hg ci -m a
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$ printf "b\n" >> a
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$ hg ci -m a
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$ printf "c\n" >> a
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$ hg ci -m a
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$ printf "d\n" >> a
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$ hg ci -m a
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$ printf "e\n" >> a
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$ hg ci -m a
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$ printf "f\n" >> a
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$ hg ci -m a
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$ printf 'g\n' >> a
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$ hg ci -m a
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$ printf 'h\n' >> a
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$ hg ci -m a
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$ hg debugrevlog -d a
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# rev p1rev p2rev start end deltastart base p1 p2 rawsize totalsize compression heads chainlen
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0 -1 -1 0 ??? 0 0 0 0 ??? ???? ? 1 0 (glob)
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1 0 -1 ??? ??? 0 0 0 0 ??? ???? ? 1 1 (glob)
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2 1 -1 ??? ??? ??? ??? ??? 0 ??? ???? ? 1 2 (glob)
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3 2 -1 ??? ??? ??? ??? ??? 0 ??? ???? ? 1 3 (glob)
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4 3 -1 ??? ??? ??? ??? ??? 0 ??? ???? ? 1 4 (glob)
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5 4 -1 ??? ??? ??? ??? ??? 0 ??? ???? ? 1 0 (glob)
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6 5 -1 ??? ??? ??? ??? ??? 0 ??? ???? ? 1 1 (glob)
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7 6 -1 ??? ??? ??? ??? ??? 0 ??? ???? ? 1 2 (glob)
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8 7 -1 ??? ??? ??? ??? ??? 0 ??? ???? ? 1 3 (glob)
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Test debuglocks command:
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$ hg debuglocks
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lock: free
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wlock: free
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Test WdirUnsupported exception
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$ hg debugdata -c ffffffffffffffffffffffffffffffffffffffff
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abort: working directory revision cannot be specified
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[255]
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Test cache warming command
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$ rm -rf .hg/cache/
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$ hg debugupdatecaches --debug
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updating the branch cache
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$ ls -r .hg/cache/*
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.hg/cache/rbc-revs-v1
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.hg/cache/rbc-names-v1
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.hg/cache/branch2-served
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$ cd ..
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#if normal-layout
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Test internal debugstacktrace command
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$ cat > debugstacktrace.py << EOF
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> from __future__ import absolute_import
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> import sys
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> from mercurial import util
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> def f():
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> util.debugstacktrace(f=sys.stdout)
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> g()
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> def g():
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> util.dst('hello from g\\n', skip=1)
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> h()
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> def h():
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> util.dst('hi ...\\nfrom h hidden in g', 1, depth=2)
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> f()
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> EOF
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$ $PYTHON debugstacktrace.py 2>&1 | egrep '(stacktrace|hello from|from h|hi \.\.)'
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stacktrace at:
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debugstacktrace.py:12*in * (glob)
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debugstacktrace.py:5*in f (glob)
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hello from g at:
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debugstacktrace.py:12*in * (glob)
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debugstacktrace.py:6*in f (glob)
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hi ...
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from h hidden in g at:
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debugstacktrace.py:6*in f (glob)
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debugstacktrace.py:9*in g (glob)
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#endif
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Test debugcapabilities command:
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$ hg debugcapabilities ./debugrevlog/
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Main capabilities:
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branchmap
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$USUAL_BUNDLE2_CAPS$
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getbundle
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known
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lookup
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pushkey
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unbundle
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Bundle2 capabilities:
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HG20
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bookmarks
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changegroup
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01
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02
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digests
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md5
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sha1
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sha512
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error
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abort
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unsupportedcontent
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pushraced
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pushkey
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hgtagsfnodes
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listkeys
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phases
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heads
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pushkey
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remote-changegroup
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http
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https
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