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-rw-r--r--tests/45-sim-chain_code_coverage.c108
1 files changed, 108 insertions, 0 deletions
diff --git a/tests/45-sim-chain_code_coverage.c b/tests/45-sim-chain_code_coverage.c
new file mode 100644
index 0000000..1ae8dab
--- /dev/null
+++ b/tests/45-sim-chain_code_coverage.c
@@ -0,0 +1,108 @@
+/**
+ * Seccomp Library test program
+ *
+ * Copyright (c) 2018 Oracle and/or its affiliates. All rights reserved.
+ * Author: Tom Hromatka <tom.hromatka@oracle.com>
+ */
+
+/*
+ * 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://www.gnu.org/licenses>.
+ */
+
+#include <errno.h>
+#include <unistd.h>
+#include <stdbool.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_KILL);
+ if (ctx == NULL)
+ return ENOMEM;
+
+ /* the syscall and argument numbers are all fake to make the test
+ * simpler */
+
+ rc = seccomp_rule_add_exact(ctx, SCMP_ACT_ALLOW, 1008, 1,
+ SCMP_A0(SCMP_CMP_GE, 1));
+ if (rc != 0)
+ goto out;
+
+ /* db_chain_lt() path #1 - due to "A1" > "A0" */
+ rc = seccomp_rule_add_exact(ctx, SCMP_ACT_ALLOW, 1008, 1,
+ SCMP_A1(SCMP_CMP_GE, 2));
+ if (rc != 0)
+ goto out;
+
+ /* db_chain_lt() path #2 - due to "GT" > "GE" */
+ rc = seccomp_rule_add_exact(ctx, SCMP_ACT_ALLOW, 1008, 1,
+ SCMP_A0(SCMP_CMP_GT, 3));
+ if (rc != 0)
+ goto out;
+
+ /* db_chain_lt() path #3 - due to the second mask (0xff) being greater
+ * than the first (0xf) */
+ rc = seccomp_rule_add_exact(ctx, SCMP_ACT_ALLOW, 1008, 1,
+ SCMP_A2(SCMP_CMP_MASKED_EQ, 0xf, 4));
+ if (rc != 0)
+ goto out;
+ rc = seccomp_rule_add_exact(ctx, SCMP_ACT_ALLOW, 1008, 1,
+ SCMP_A2(SCMP_CMP_MASKED_EQ, 0xff, 5));
+ if (rc != 0)
+ goto out;
+
+ /* db_chain_lt() path #4 - due to datum (6) > previous datum (5) */
+ rc = seccomp_rule_add_exact(ctx, SCMP_ACT_ALLOW, 1008, 1,
+ SCMP_A2(SCMP_CMP_MASKED_EQ, 0xff, 6));
+ if (rc != 0)
+ goto out;
+
+ /* attempt to hit some of the lvl_prv and lvl_nxt code in db.c */
+ rc = seccomp_rule_add_exact(ctx, SCMP_ACT_ALLOW, 1008, 5,
+ SCMP_A0(SCMP_CMP_NE, 7),
+ SCMP_A1(SCMP_CMP_LT, 8),
+ SCMP_A2(SCMP_CMP_EQ, 9),
+ SCMP_A3(SCMP_CMP_GE, 10),
+ SCMP_A4(SCMP_CMP_GT, 11),
+ SCMP_A5(SCMP_CMP_MASKED_EQ, 0xffff, 12));
+ if (rc != 0)
+ goto out;
+ rc = seccomp_rule_add_exact(ctx, SCMP_ACT_ALLOW, 1008, 5,
+ SCMP_A0(SCMP_CMP_NE, 7),
+ SCMP_A1(SCMP_CMP_LT, 8),
+ SCMP_A2(SCMP_CMP_EQ, 9),
+ SCMP_A3(SCMP_CMP_GE, 10),
+ SCMP_A4(SCMP_CMP_GT, 11),
+ SCMP_A5(SCMP_CMP_MASKED_EQ, 0xffff, 13));
+ if (rc != 0)
+ goto out;
+
+ rc = util_filter_output(&opts, ctx);
+ if (rc)
+ goto out;
+
+out:
+ seccomp_release(ctx);
+ return (rc < 0 ? -rc : rc);
+}