tests: add test for coredump handler hanging at shutdown (#3101)

Test for #2691.

test/TEST-09-ISSUE-2691/Makefile

@@ -0,0 +1 @@
+../TEST-01-BASIC/Makefile

test/TEST-09-ISSUE-2691/test.sh

@@ -0,0 +1,76 @@
+#!/bin/bash
+# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
+# ex: ts=8 sw=4 sts=4 et filetype=sh
+TEST_DESCRIPTION="https://github.com/systemd/systemd/issues/2691"
+
+. $TEST_BASE_DIR/test-functions
+SKIP_INITRD=yes
+QEMU_TIMEOUT=90
+
+check_result_qemu() {
+    ret=1
+    mkdir -p $TESTDIR/root
+    mount ${LOOPDEV}p1 $TESTDIR/root
+    [[ -e $TESTDIR/root/testok ]] && ret=0
+    [[ -f $TESTDIR/root/failed ]] && cp -a $TESTDIR/root/failed $TESTDIR
+    cp -a $TESTDIR/root/var/log/journal $TESTDIR
+    umount $TESTDIR/root
+    [[ -f $TESTDIR/failed ]] && cat $TESTDIR/failed
+    ls -l $TESTDIR/journal/*/*.journal
+    test -s $TESTDIR/failed && ret=$(($ret+1))
+    return $ret
+}
+
+test_run() {
+    run_qemu || return 1
+    check_result_qemu || return 1
+    return 0
+}
+
+test_setup() {
+    create_empty_image
+    mkdir -p $TESTDIR/root
+    mount ${LOOPDEV}p1 $TESTDIR/root
+
+    # Create what will eventually be our root filesystem onto an overlay
+    (
+        LOG_LEVEL=5
+        eval $(udevadm info --export --query=env --name=${LOOPDEV}p2)
+
+        setup_basic_environment
+
+        # setup the testsuite service
+        cat >$initdir/etc/systemd/system/testsuite.service <<'EOF'
+[Unit]
+Description=Testsuite service
+After=multi-user.target
+
+[Service]
+Type=oneshot
+ExecStart=/bin/sh -c '>/testok'
+RemainAfterExit=yes
+ExecStop=/bin/sh -c 'kill -SEGV $$$$'
+TimeoutStopSec=180s
+EOF
+
+        setup_testsuite
+    ) || return 1
+
+    # mask some services that we do not want to run in these tests
+    ln -s /dev/null $initdir/etc/systemd/system/systemd-hwdb-update.service
+    ln -s /dev/null $initdir/etc/systemd/system/systemd-journal-catalog-update.service
+    ln -s /dev/null $initdir/etc/systemd/system/systemd-networkd.service
+    ln -s /dev/null $initdir/etc/systemd/system/systemd-networkd.socket
+    ln -s /dev/null $initdir/etc/systemd/system/systemd-resolved.service
+
+    ddebug "umount $TESTDIR/root"
+    umount $TESTDIR/root
+}
+
+test_cleanup() {
+    umount $TESTDIR/root 2>/dev/null
+    [[ $LOOPDEV ]] && losetup -d $LOOPDEV
+    return 0
+}
+
+do_test "$@"