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* Add a test for a more subtle race: a process starting after the

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temporary root files have been read but creating outputs before the
  store directory has been read.
This commit is contained in:
Eelco Dolstra 2005-01-31 22:01:55 +00:00
parent 207bdcbe86
commit 89c9bc11ab
5 changed files with 85 additions and 20 deletions
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39
tests/gc-concurrent.sh
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@ -1,21 +1,34 @@
storeExpr=$($TOP/src/nix-instantiate/nix-instantiate gc-concurrent.nix)
outPath=$($TOP/src/nix-store/nix-store -q $storeExpr)
storeExpr1=$($TOP/src/nix-instantiate/nix-instantiate gc-concurrent.nix)
outPath1=$($TOP/src/nix-store/nix-store -q $storeExpr1)
storeExpr2=$($TOP/src/nix-instantiate/nix-instantiate gc-concurrent2.nix)
outPath2=$($TOP/src/nix-store/nix-store -q $storeExpr2)
ls -l test-tmp/state/temproots
# Start build #1 in the background. It starts immediately.
$TOP/src/nix-store/nix-store -rvv "$storeExpr1" &
pid1=$!
# Start a build in the background.
$TOP/src/nix-store/nix-store -rvv "$storeExpr" &
pid=$!
# Start build #2 in the background after 3 seconds.
(sleep 3 && $TOP/src/nix-store/nix-store -rvv "$storeExpr2") &
pid2=$!
# Run the garbage collector while the build is running.
# Run the garbage collector while the build is running. Note: the GC
# sleeps for *another* 2 seconds after acquiring the GC lock. This
# checks whether build #1
sleep 2
$NIX_BIN_DIR/nix-collect-garbage -vvvvv
NIX_DEBUG_GC_WAIT=1 $NIX_BIN_DIR/nix-collect-garbage -vvvvv
# Wait for the build to finish.
echo waiting for pid $pid to finish...
wait $pid
# Wait for build #1/#2 to finish.
echo waiting for pid $pid1 to finish...
wait $pid1
echo waiting for pid $pid2 to finish...
wait $pid2
# Check that the root and its dependencies haven't been deleted.
cat $outPath/foobar
cat $outPath/input-2/bar
# Check that the root of build #1 and its dependencies haven't been
# deleted.
cat $outPath1/foobar
cat $outPath1/input-2/bar
cat $outPath2/foobar