cryb-to/include/cryb/coverage.h

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/*-
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* Copyright (c) 2014-2017 Dag-Erling Smørgrav
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* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef CRYB_COVERAGE_H_INCLUDED
#define CRYB_COVERAGE_H_INCLUDED
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#ifndef CRYB_TO
#include <cryb/to.h>
#endif
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#if _BullseyeCoverage
# define CRYB_COVERAGE 1
# define CRYB_DISABLE_COVERAGE _Pragma("BullseyeCoverage save off")
# define CRYB_RESTORE_COVERAGE _Pragma("BullseyeCoverage restore")
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#else
# define CRYB_COVERAGE 0
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# define CRYB_DISABLE_COVERAGE
# define CRYB_RESTORE_COVERAGE
#endif
/*
* Some switch constructs may leave you trapped between a static analyzer
* that complains about the lack of a default case and a dynamic analyzer
* that complains about dead code. Use this macro at the end of a switch
* that does not need a default case.
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*/
#define CRYB_NO_DEFAULT_CASE \
CRYB_DISABLE_COVERAGE \
break; default: do { *(volatile int *)0 = 0; } while (0) \
CRYB_RESTORE_COVERAGE
/*
* Use wherever a static analyzer is unable to correctly determine that a
* loop will never terminate, an if-else chain will always cover all
* possible cases, etc.
*/
#define CRYB_UNREACHABLE \
CRYB_DISABLE_COVERAGE \
do { *(volatile int *)0 = 0; } while (0) \
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CRYB_RESTORE_COVERAGE
#endif