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DEBUG: rename WARN_ON_ONCE() to CHECK_IF()

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The only reason for warning once is to check if a condition really
happens. Let's use a term that better translates the intent, that's
important when reading the code.
This commit is contained in:
Willy Tarreau 2022-02-28 11:51:23 +01:00
parent 3b1d190831
commit 6d3f1e322e
2 changed files with 7 additions and 7 deletions
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6
include/haproxy/bug.h
View File

@ -113,15 +113,15 @@
#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: ", " (please report to developers)")
#define WARN_ON_ONCE(cond) _BUG_ON_ONCE(cond, __FILE__, __LINE__, 0, "WARNING: ", " (please report to developers)")
#define CHECK_IF(cond) _BUG_ON_ONCE(cond, __FILE__, __LINE__, 0, "WARNING: ", " (please report to developers)")
#elif defined(DEBUG_STRICT_NOCRASH)
#define BUG_ON(cond) _BUG_ON (cond, __FILE__, __LINE__, 2, "FATAL: bug ", " (not crashing but process is untrusted now)")
#define WARN_ON(cond) _BUG_ON (cond, __FILE__, __LINE__, 0, "WARNING: ", " (please report to developers)")
#define WARN_ON_ONCE(cond) _BUG_ON_ONCE(cond, __FILE__, __LINE__, 0, "WARNING: ", " (please report to developers)")
#define CHECK_IF(cond) _BUG_ON_ONCE(cond, __FILE__, __LINE__, 0, "WARNING: ", " (please report to developers)")
#else
#define BUG_ON(cond)
#define WARN_ON(cond)
#define WARN_ON_ONCE(cond)
#define CHECK_IF(cond)
#endif
/* When not optimizing, clang won't remove that code, so only compile it in when optimizing */

8
src/debug.c
View File

@ -376,16 +376,16 @@ int debug_parse_cli_warn(char **args, char *payload, struct appctx *appctx, void
return 1;
}
/* parse a "debug dev warn1" command. It always returns 1.
/* parse a "debug dev check" command. It always returns 1.
* Note: we make sure not to make the function static so that it appears in the trace.
*/
int debug_parse_cli_warn1(char **args, char *payload, struct appctx *appctx, void *private)
int debug_parse_cli_check(char **args, char *payload, struct appctx *appctx, void *private)
{
if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
return 1;
_HA_ATOMIC_INC(&debug_commands_issued);
WARN_ON_ONCE(one > zero);
CHECK_IF(one > zero);
return 1;
}
@ -1398,6 +1398,7 @@ REGISTER_PER_THREAD_INIT(init_debug_per_thread);
/* register cli keywords */
static struct cli_kw_list cli_kws = {{ },{
{{ "debug", "dev", "bug", NULL }, "debug dev bug : call BUG_ON() and crash", debug_parse_cli_bug, NULL, NULL, NULL, ACCESS_EXPERT },
{{ "debug", "dev", "check", NULL }, "debug dev check : call CHECK_IF() and possibly crash", debug_parse_cli_check, NULL, NULL, NULL, ACCESS_EXPERT },
{{ "debug", "dev", "close", NULL }, "debug dev close <fd> : close this file descriptor", debug_parse_cli_close, NULL, NULL, NULL, ACCESS_EXPERT },
{{ "debug", "dev", "delay", NULL }, "debug dev delay [ms] : sleep this long", debug_parse_cli_delay, NULL, NULL, NULL, ACCESS_EXPERT },
#if defined(DEBUG_DEV)
@ -1417,7 +1418,6 @@ static struct cli_kw_list cli_kws = {{ },{
{{ "debug", "dev", "sym", NULL }, "debug dev sym <addr> : resolve symbol address", debug_parse_cli_sym, NULL, NULL, NULL, ACCESS_EXPERT },
{{ "debug", "dev", "tkill", NULL }, "debug dev tkill [thr] [sig] : send signal to thread", debug_parse_cli_tkill, NULL, NULL, NULL, ACCESS_EXPERT },
{{ "debug", "dev", "warn", NULL }, "debug dev warn : call WARN_ON() and possibly crash", debug_parse_cli_warn, NULL, NULL, NULL, ACCESS_EXPERT },
{{ "debug", "dev", "warn1", NULL }, "debug dev warn1 : call WARN_ON_ONCE() and possibly crash", debug_parse_cli_warn1, NULL, NULL, NULL, ACCESS_EXPERT },
{{ "debug", "dev", "write", NULL }, "debug dev write [size] : write that many bytes in return", debug_parse_cli_write, NULL, NULL, NULL, ACCESS_EXPERT },
#if defined(HA_HAVE_DUMP_LIBS)
{{ "show", "libs", NULL, NULL }, "show libs : show loaded object files and libraries", debug_parse_cli_show_libs, NULL, NULL },