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120681c1a3
Several static analyzers (clang's one, Facebook Infer, etc.) warn about NULL pointer dereferences after a call to CU_ASSERT_PTR_NOT_NULL_FATAL() in the test code written using CUnit framework. This is because this CUnit macro is too complex for them to understand that the pointer cannot be NULL: it is translated to a call to CU_assertImplementation() with an argument as TRUE in order to mean that the call is fatal if the asserted condition failed (cf. http://cunit.sourceforge.net/doxdocs/group__Framework.html). A possible solution could consist in replacing the CU_ASSERT_..._FATAL() calls by assert() ones, as most static analyzers know about assert(). Nevertheless this seems to go against CUnit's API. An alternative solution consists in overriding CU_ASSERT_..._FATAL() macros in order to expand to assert() after a call to the matching CU_ASSERT_...() non-fatal macro. This appears to work fine and to remove many false-positive warnings from various static analyzers. As this substitution should only occur when using static analyzer, put it under #ifdef __CHECKER__, which is the macro used by sparse when analyzing the Linux kernel. Signed-off-by: Nicolas Iooss <nicolas.iooss@m4x.org>
89 lines
2.9 KiB
C
89 lines
2.9 KiB
C
/*
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* Author: Joshua Brindle <jbrindle@tresys.com>
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* Chad Sellers <csellers@tresys.com>
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*
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* Copyright (C) 2006 Tresys Technology, LLC
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef __COMMON_H__
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#define __COMMON_H__
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#include <sepol/policydb/policydb.h>
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#include <sepol/policydb/conditional.h>
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#include <CUnit/Basic.h>
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/* helper functions */
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/* Override CU_*_FATAL() in order to help static analyzers by really asserting that an assertion holds */
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#ifdef __CHECKER__
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#include <assert.h>
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#undef CU_ASSERT_FATAL
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#define CU_ASSERT_FATAL(value) do { \
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int _value = (value); \
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CU_ASSERT(_value); \
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assert(_value); \
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} while (0)
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#undef CU_FAIL_FATAL
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#define CU_FAIL_FATAL(msg) do { \
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CU_FAIL(msg); \
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assert(0); \
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} while (0)
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#undef CU_ASSERT_PTR_NOT_NULL_FATAL
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#define CU_ASSERT_PTR_NOT_NULL_FATAL(value) do { \
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const void *_value = (value); \
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CU_ASSERT_PTR_NOT_NULL(_value); \
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assert(_value != NULL); \
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} while (0)
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#endif /* __CHECKER__ */
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/* Load a source policy into p. policydb_init will called within this function.
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*
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* Example: test_load_policy(p, POLICY_BASE, 1, "foo", "base.conf") will load the
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* policy "policies/foo/mls/base.conf" into p.
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*
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* Arguments:
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* p policydb_t into which the policy will be read. This should be
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* malloc'd but not passed to policydb_init.
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* policy_type Type of policy expected - POLICY_BASE or POLICY_MOD.
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* mls Boolean value indicating whether an mls policy is expected.
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* test_name Name of the test which will be the name of the directory in
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* which the policies are stored.
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* policy_name Name of the policy in the directory.
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*
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* Returns:
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* 0 success
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* -1 error - the policydb will be destroyed but not freed.
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*/
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extern int test_load_policy(policydb_t * p, int policy_type, int mls, const char *test_name, const char *policy_name);
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/* Find an avrule_decl_t by a unique symbol. If the symbol is declared in more
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* than one decl an error is returned.
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*
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* Returns:
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* decl success
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* NULL error (including more than one declaration)
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*/
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extern avrule_decl_t *test_find_decl_by_sym(policydb_t * p, int symtab, const char *sym);
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#endif
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