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Fix ubsan build on freebsd regarding float. #15935

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Fix ubsan build on freebsd regarding float. #15935

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15 changes: 14 additions & 1 deletion Zend/zend_operators.h
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Original file line number Diff line number Diff line change
Expand Up @@ -27,7 +27,20 @@
#include <stddef.h>

#ifdef HAVE_IEEEFP_H
#include <ieeefp.h>
/**
* On FreeBSD with ubsan/clang we get the following:
* `/usr/include/machine/ieeefp.h:161:17: runtime error: left shift of negative value -1`
* `SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /usr/include/machine/ieeefp.h:161:17`
* ...
* `_newcw |= (~_m << FP_MSKS_OFF) & FP_MSKS_FLD;`
**/
# if __has_feature(undefined_behavior_sanitizer) && defined(__FreeBSD__) && defined(__clang__)
# pragma clang attribute push (__attribute__((no_sanitize("undefined"))), apply_to=function)
# endif
# include <ieeefp.h>
# if __has_feature(undefined_behavior_sanitizer) && defined(__FreeBSD__) && defined(__clang__)
# pragma clang attribute pop
# endif
#endif

#include "zend_portability.h"
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