lix/tests/functional/gc-runtime.sh
Artemis Tosini c03de0df62 gc: Find roots using libproc on Darwin
Previously, the garbage collector found runtime roots on Darwin by
shelling out to `lsof -n -w -F n` then parsing the result.
However, this requires an lsof binary and can be extremely slow.

The official Apple lsof returns in a reasonable amount of time,
about 250ms in my tests, but the lsof packaged in nixpkgs is quite slow,
taking about 40 seconds to run the command.

Using libproc directly is about the same speed as Apple lsof,
and allows us to reënable several tests that were disabled on Darwin.

Change-Id: Ifa0adda7984e13c15535693baba835aae79a3577
2024-04-25 23:24:21 -04:00

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source common.sh
set -m # enable job control, needed for kill
profiles="$NIX_STATE_DIR"/profiles
rm -rf $profiles
nix-env -p $profiles/test -f ./gc-runtime.nix -i gc-runtime-{program,environ,open}
programPath=$(nix-env -p $profiles/test -q --no-name --out-path gc-runtime-program)
environPath=$(nix-env -p $profiles/test -q --no-name --out-path gc-runtime-environ)
openPath=$(nix-env -p $profiles/test -q --no-name --out-path gc-runtime-open)
echo $programPath $environPath $openPath
echo "backgrounding program..."
export environPath
$profiles/test/program $openPath/open &
sleep 2 # hack - wait for the program to get started
child=$!
echo PID=$child
nix-env -p $profiles/test -e gc-runtime-{program,environ,open}
nix-env -p $profiles/test --delete-generations old
nix-store --gc
kill -- -$child
if ! test -e $programPath; then
echo "running program was garbage collected!"
exit 1
fi
if ! test -e $environPath; then
echo "file in environment variable was garbage collected!"
exit 1
fi
if ! test -e $openPath; then
echo "opened file was garbage collected!"
exit 1
fi
exit 0