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BUILD: debug: make sure debug macros are never empty

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As outlined in commit f7ebe584d7 ("BUILD: debug: Add braces to if
statement calling only CHECK_IF()"), the BUG_ON() family of macros
is incorrectly defined to be empty when debugging is disabled, and
that can lead to trouble. Make sure they always fall back to the
usual "do { } while (0)". This may be backported to 2.6 if needed,
though no such issue was met there to date.
This commit is contained in:
Willy Tarreau 2022-08-31 10:52:25 +02:00
parent 3ff9610356
commit d8009a1ca6
1 changed files with 5 additions and 5 deletions
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10
include/haproxy/bug.h
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@ -140,9 +140,9 @@ static inline __attribute((always_inline)) void ha_crash_now(void)
# define CHECK_IF(cond) _BUG_ON_ONCE(cond, __FILE__, __LINE__, 1, "FATAL: check ", "")
# endif
#else
# define BUG_ON(cond)
# define WARN_ON(cond)
# define CHECK_IF(cond)
# define BUG_ON(cond) do { } while (0)
# define WARN_ON(cond) do { } while (0)
# define CHECK_IF(cond) do { } while (0)
#endif
/* These macros are only for hot paths and remain disabled unless DEBUG_STRICT is 2 or above.
@ -164,8 +164,8 @@ static inline __attribute((always_inline)) void ha_crash_now(void)
# define CHECK_IF_HOT(cond) _BUG_ON_ONCE(cond, __FILE__, __LINE__, 1, "FATAL: check ", "")
# endif
#else
# define BUG_ON_HOT(cond)
# define CHECK_IF_HOT(cond)
# define BUG_ON_HOT(cond) do { } while (0)
# define CHECK_IF_HOT(cond) do { } while (0)
#endif