From: Szabolcs Nagy <nsz@port70.net>
Date: Tue, 19 Aug 2014 17:58:05 +0000 (+0200)
Subject: fix memfill to use up libc reserved memory (glibc usually has some)
X-Git-Url: http://nsz.repo.hu/git/?p=libc-test;a=commitdiff_plain;h=fc5db49aefdfc1f7eedf706e1b05c2af56732796;ds=sidebyside

fix memfill to use up libc reserved memory (glibc usually has some)
---

diff --git a/src/common/memfill.c b/src/common/memfill.c
index 2b8f999..ee47e1a 100644
--- a/src/common/memfill.c
+++ b/src/common/memfill.c
@@ -6,11 +6,16 @@
 int t_memfill()
 {
 	int r = 0;
+	/* alloc mmap space with PROT_NONE */
 	if (t_vmfill(0,0,0) < 0) {
 		t_error("vmfill failed: %s\n", strerror(errno));
 		r = -1;
 	}
+	/* limit brk space */
 	if (t_setrlim(RLIMIT_DATA, 0) < 0)
 		r = -1;
+	if (!r)
+		/* use up libc reserves if any */
+		while (malloc(1));
 	return r;
 }