From: Willy Tarreau <w@1wt.eu>
Date: Tue, 25 Nov 2014 12:45:16 +0000 (+0100)
Subject: DEBUG: pools: apply poisonning on every allocated pool
X-Git-Tag: v1.6-dev1~258
X-Git-Url: http://git.kaiwu.me/postgresql/log/contrib/postgres_fdw/postgres_fdw.c?a=commitdiff_plain;h=23a5c396ec268f6cf1958d73b56cd107c4d9ef18;p=haproxy.git

DEBUG: pools: apply poisonning on every allocated pool

Till now, when memory poisonning was enabled, it used to be done only
after a calloc(). But sometimes it's not enough to detect unexpected
sharing, so let's ensure that we now poison every allocation once it's
in place. Note that enabling poisonning significantly hurts performance
(it can typically half the overall performance).
---

diff --git a/include/common/memory.h b/include/common/memory.h
index dd2b21f4e..e446d81b6 100644
--- a/include/common/memory.h
+++ b/include/common/memory.h
@@ -179,6 +179,8 @@ void *pool_destroy2(struct pool_head *pool);
         else {                                                  \
                 (pool)->free_list = *(void **)(pool)->free_list;\
 		(pool)->used++;					\
+		if (unlikely(mem_poison_byte))			\
+			memset(__p, mem_poison_byte, (pool)->size);	\
         }                                                       \
         __p;                                                    \
 })