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include: add a userland version of __assert_unreachable

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The kernel has had a version of this since
c79cee7136 ("kernel: provide panicky version of __unreachable"), and
userland can benefit from the same.  __unreachable is largely
inadequate because it's *not* an assertion of any sort, so we're not
really alerted to a problem that we could've anticipated.

Reviewed by:	emaste, imp, jhb, olce
Differential Revision:	https://reviews.freebsd.org/D48077

(cherry picked from commit 712f81feea416e9f8aaf040173883876a50a7d34)
This commit is contained in:
Kyle Evans 2025-01-12 18:41:25 -06:00 committed by Christos Margiolis
parent 01ade56eba
commit 235fe911df
1 changed files with 7 additions and 0 deletions
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7
include/assert.h
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@ -45,15 +45,22 @@
#undef assert
#undef _assert
#undef __assert_unreachable
#ifdef NDEBUG
#define assert(e) ((void)0)
#define _assert(e) ((void)0)
#if __BSD_VISIBLE
#define __assert_unreachable() __unreachable()
#endif /* __BSD_VISIBLE */
#else
#define _assert(e) assert(e)
#define assert(e) ((e) ? (void)0 : __assert(__func__, __FILE__, \
__LINE__, #e))
#if __BSD_VISIBLE
#define __assert_unreachable() assert(0 && "unreachable segment reached")
#endif /* __BSD_VISIBLE */
#endif /* NDEBUG */
#ifndef _ASSERT_H_