tests: Add a binary tree test with zero syscalls

Add a test that exercises the binary tree optimization but
the seccomp filter has zero syscalls in it.

Related-bug: #370
Signed-off-by: Tom Hromatka <[email protected]>
Acked-by: Paul Moore <[email protected]>

tests/.gitignore

@@ -66,3 +66,4 @@ util.pyc
 56-basic-iterate_syscalls
 57-basic-rawsysrc
 58-live-tsync_notify
+59-basic-empty_binary_tree

tests/59-basic-empty_binary_tree.c

@@ -0,0 +1,54 @@
+/**
+ * Seccomp Library test program
+ *
+ * Copyright (c) 2018-2020 Oracle and/or its affiliates.
+ * Author: Tom Hromatka <[email protected]>
+ */
+
+/*
+ * This library is free software; you can redistribute it and/or modify it
+ * under the terms of version 2.1 of the GNU Lesser General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library; if not, see <http:https://www.gnu.org/licenses>.
+ */
+
+#include <errno.h>
+#include <unistd.h>
+
+#include <seccomp.h>
+
+#include "util.h"
+
+int main(int argc, char *argv[])
+{
+ int rc;
+ struct util_options opts;
+ scmp_filter_ctx ctx = NULL;
+
+ rc = util_getopt(argc, argv, &opts);
+ if (rc < 0)
+ goto out;
+
+ ctx = seccomp_init(SCMP_ACT_ALLOW);
+ if (ctx == NULL)
+ return ENOMEM;
+
+ rc = seccomp_attr_set(ctx, SCMP_FLTATR_CTL_OPTIMIZE, 2);
+ if (rc < 0)
+ goto out;
+
+ rc = util_filter_output(&opts, ctx);
+ if (rc)
+ goto out;
+
+out:
+ seccomp_release(ctx);
+ return (rc < 0 ? -rc : rc);
+}

tests/59-basic-empty_binary_tree.py

@@ -0,0 +1,41 @@
+#!/usr/bin/env python
+
+#
+# Seccomp Library test program
+#
+# Copyright (c) 2022 Oracle and/or its affiliates.
+# Author: Tom Hromatka <[email protected]>
+#
+
+#
+# This library is free software; you can redistribute it and/or modify it
+# under the terms of version 2.1 of the GNU Lesser General Public License as
+# published by the Free Software Foundation.
+#
+# This library is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+# for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this library; if not, see <http:https://www.gnu.org/licenses>.
+#
+
+import argparse
+import sys
+
+import util
+
+from seccomp import *
+
+def test(args):
+ f = SyscallFilter(ALLOW)
+ f.set_attr(Attr.CTL_OPTIMIZE, 2)
+ return f
+
+args = util.get_opt()
+ctx = test(args)
+util.filter_output(args, ctx)
+
+# kate: syntax python;
+# kate: indent-mode python; space-indent on; indent-width 4; mixedindent off;

tests/59-basic-empty_binary_tree.tests

@@ -0,0 +1,16 @@
+#
+# libseccomp regression test automation data
+#
+# Copyright (c) 2022 Oracle and/or its affiliates.
+# Author: Tom Hromatka <[email protected]>
+#
+
+test type: bpf-sim
+
+# Testname Arch Syscall Arg0 Arg1 Arg2 Arg3 Arg4 Arg5 Result
+59-basic-empty_binary_tree all,-x32 0-350 N N N N N N ALLOW
+
+test type: bpf-valgrind
+
+# Testname
+59-basic-empty_binary_tree

tests/Makefile.am

@@ -93,7 +93,8 @@ check_PROGRAMS = \
  55-basic-pfc_binary_tree \
  56-basic-iterate_syscalls \
  57-basic-rawsysrc \
- 58-live-tsync_notify
+ 58-live-tsync_notify \
+ 59-basic-empty_binary_tree
 
 EXTRA_DIST_TESTPYTHON = \
  util.py \
@@ -152,7 +153,8 @@ EXTRA_DIST_TESTPYTHON = \
  54-live-binary_tree.py \
  56-basic-iterate_syscalls.py \
  57-basic-rawsysrc.py \
- 58-live-tsync_notify.py
+ 58-live-tsync_notify.py \
+ 59-basic-empty_binary_tree.py
 
 EXTRA_DIST_TESTCFGS = \
  01-sim-allow.tests \
@@ -212,7 +214,8 @@ EXTRA_DIST_TESTCFGS = \
  55-basic-pfc_binary_tree.tests \
  56-basic-iterate_syscalls.tests \
  57-basic-rawsysrc.tests \
- 58-live-tsync_notify.tests
+ 58-live-tsync_notify.tests \
+ 59-basic-empty_binary_tree.tests
 
 EXTRA_DIST_TESTSCRIPTS = \
  38-basic-pfc_coverage.sh 38-basic-pfc_coverage.pfc \