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DEBUG: implement 4 levels of choices between warn and crash. 

We used to have DEBUG_STRICT_NOCRASH to disable crashes on BUG_ON().
Now we have other levels (WARN_ON(), CHECK_IF()) so we need something
finer-grained.

This patch introduces DEBUG_STRICT_ACTION which takes an integer value.
0 disables crashes and is the equivalent of DEBUG_STRICT_NOCRASH. 1 is
the default and only enables crashes on BUG_ON(). 2 also enables crashes
on WARN_ON(), and 3 also enables warnings on CHECK_IF(), and is suited
to developers and CI.
This commit is contained in:
Willy Tarreau 2022-02-28 14:59:25 +01:00
parent ef16578822
commit 86bcc53084
2 changed files with 29 additions and 8 deletions
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2
Makefile
View File

@ -255,7 +255,7 @@ SMALL_OPTS =
# not use them at all. Some even more obscure ones might also be available
# without appearing here. Currently defined DEBUG macros include DEBUG_FULL,
# DEBUG_MEM_STATS, DEBUG_DONT_SHARE_POOLS, DEBUG_FD, DEBUG_POOL_INTEGRITY,
# DEBUG_NO_POOLS, DEBUG_FAIL_ALLOC, DEBUG_STRICT_NOCRASH, DEBUG_HPACK,
# DEBUG_NO_POOLS, DEBUG_FAIL_ALLOC, DEBUG_STRICT_ACTION=[0-3], DEBUG_HPACK,
# DEBUG_AUTH, DEBUG_SPOE, DEBUG_UAF, DEBUG_THREAD, DEBUG_STRICT, DEBUG_DEV,
# DEBUG_TASK, DEBUG_MEMORY_POOLS, DEBUG_POOL_TRACING.
DEBUG = -DDEBUG_STRICT -DDEBUG_MEMORY_POOLS

35
include/haproxy/bug.h
View File

@ -106,18 +106,39 @@
__bug_cond; /* let's return the condition */ \
})
/* BUG_ON: complains if <cond> is true when DEBUG_STRICT or DEBUG_STRICT_NOCRASH
* are set, does nothing otherwise. With DEBUG_STRICT in addition it immediately
* crashes using ABORT_NOW() above.
/* DEBUG_STRICT enables/disables runtime checks on condition <cond>
* DEBUG_STRICT_ACTION indicates the level of verification on the rules when
* <cond> is true:
*
* macro BUG_ON() WARN_ON() CHECK_IF()
* value 0 warn warn warn
* 1 CRASH warn warn
* 2 CRASH CRASH warn
* 3 CRASH CRASH CRASH
*/
#if defined(DEBUG_STRICT)
# define BUG_ON(cond) _BUG_ON (cond, __FILE__, __LINE__, 3, "FATAL: bug ", "")
# define WARN_ON(cond) _BUG_ON (cond, __FILE__, __LINE__, 0, "WARNING: warn ", " (please report to developers)")
# define CHECK_IF(cond) _BUG_ON_ONCE(cond, __FILE__, __LINE__, 0, "WARNING: check ", " (please report to developers)")
#elif defined(DEBUG_STRICT_NOCRASH)
# if defined(DEBUG_STRICT_ACTION) && (DEBUG_STRICT_ACTION < 1)
/* Lowest level: BUG_ON() warns, WARN_ON() warns, CHECK_IF() warns */
# define BUG_ON(cond) _BUG_ON (cond, __FILE__, __LINE__, 2, "WARNING: bug ", " (not crashing but process is untrusted now, please report to developers)")
# define WARN_ON(cond) _BUG_ON (cond, __FILE__, __LINE__, 0, "WARNING: warn ", " (please report to developers)")
# define CHECK_IF(cond) _BUG_ON_ONCE(cond, __FILE__, __LINE__, 0, "WARNING: check ", " (please report to developers)")
# elif !defined(DEBUG_STRICT_ACTION) || (DEBUG_STRICT_ACTION == 1)
/* default level: BUG_ON() crashes, WARN_ON() warns, CHECK_IF() warns */
# define BUG_ON(cond) _BUG_ON (cond, __FILE__, __LINE__, 3, "FATAL: bug ", "")
# define WARN_ON(cond) _BUG_ON (cond, __FILE__, __LINE__, 0, "WARNING: warn ", " (please report to developers)")
# define CHECK_IF(cond) _BUG_ON_ONCE(cond, __FILE__, __LINE__, 0, "WARNING: check ", " (please report to developers)")
# elif DEBUG_STRICT_ACTION == 2
/* Stricter level: BUG_ON() crashes, WARN_ON() crashes, CHECK_IF() warns */
# define BUG_ON(cond) _BUG_ON (cond, __FILE__, __LINE__, 3, "FATAL: bug ", "")
# define WARN_ON(cond) _BUG_ON (cond, __FILE__, __LINE__, 1, "FATAL: warn ", "")
# define CHECK_IF(cond) _BUG_ON_ONCE(cond, __FILE__, __LINE__, 0, "WARNING: check ", " (please report to developers)")
# elif DEBUG_STRICT_ACTION >= 3
/* Developer/CI level: BUG_ON() crashes, WARN_ON() crashes, CHECK_IF() crashes */
# define BUG_ON(cond) _BUG_ON (cond, __FILE__, __LINE__, 3, "FATAL: bug ", "")
# define WARN_ON(cond) _BUG_ON (cond, __FILE__, __LINE__, 1, "FATAL: warn ", "")
# define CHECK_IF(cond) _BUG_ON_ONCE(cond, __FILE__, __LINE__, 1, "FATAL: check ", "")
# endif
#else
# define BUG_ON(cond)
# define WARN_ON(cond)