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636bd7a259
This adds a `CRYB_UNREACHABLE` macro which will cause a segfault if reached, and modifies `CRYB_NO_DEFAULT_CASE` to have essentially the same semantics. It also removes the conditionals since the coverage macros are always defined.
68 lines
2.6 KiB
C
68 lines
2.6 KiB
C
/*-
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* Copyright (c) 2014-2016 Dag-Erling Smørgrav
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef CRYB_COVERAGE_H_INCLUDED
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#define CRYB_COVERAGE_H_INCLUDED
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#ifndef CRYB_TO
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#include <cryb/to.h>
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#endif
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#if _BullseyeCoverage
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# define CRYB_COVERAGE 1
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# define CRYB_DISABLE_COVERAGE _Pragma("BullseyeCoverage save off")
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# define CRYB_RESTORE_COVERAGE _Pragma("BullseyeCoverage restore")
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#else
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# define CRYB_COVERAGE 0
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# define CRYB_DISABLE_COVERAGE
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# define CRYB_RESTORE_COVERAGE
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#endif
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/*
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* Some switch constructs may leave you trapped between a static analyzer
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* that complains about the lack of a default case and a dynamic analyzer
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* that complains about dead code. Use this macro at the end of a switch
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* that does not need a default case.
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*/
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#define CRYB_NO_DEFAULT_CASE \
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CRYB_DISABLE_COVERAGE \
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break; default: do { *(volatile int *)0 = 0; } while (0) \
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CRYB_RESTORE_COVERAGE
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/*
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* Use wherever a static analyzer is unable to correctly determine that a
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* loop will never terminate, an if-else chain will always cover all
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* possible cases, etc.
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*/
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#define CRYB_UNREACHABLE \
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CRYB_DISABLE_COVERAGE \
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do { *(volatile int *)0 = 0; } while (0) \
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CRYB_RESTORE_COVERAGE
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#endif
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