CLEANUP: tree-wide: replace free(x);x=NULL with ha_free(&x)
This makes the code more readable and less prone to copy-paste errors.
In addition, it allows to place some __builtin_constant_p() predicates
to trigger a link-time error in case the compiler knows that the freed
area is constant. It will also produce compile-time error if trying to
free something that is not a regular pointer (e.g. a function).
The DEBUG_MEM_STATS macro now also defines an instance for ha_free()
so that all these calls can be checked.
178 occurrences were converted. The vast majority of them were handled
by the following Coccinelle script, some slightly refined to better deal
with "&*x" or with long lines:
@ rule @
expression E;
@@
- free(E);
- E = NULL;
+ ha_free(&E);
It was verified that the resulting code is the same, more or less a
handful of cases where the compiler optimized slightly differently
the temporary variable that holds the copy of the pointer.
A non-negligible amount of {free(str);str=NULL;str_len=0;} are still
present in the config part (mostly header names in proxies). These
ones should also be cleaned for the same reasons, and probably be
turned into ist strings.
diff --git a/src/mailers.c b/src/mailers.c
index 76d6a69..291064d 100644
--- a/src/mailers.c
+++ b/src/mailers.c
@@ -50,8 +50,7 @@
free_tcpcheck(rule, 1);
}
free_tcpcheck_vars(&alert->rules.preset_vars);
- free(alert->rules.list);
- alert->rules.list = NULL;
+ ha_free(&alert->rules.list);
}
pool_free(pool_head_email_alert, alert);
}