From: H.J. Lu <hongjiu.lu@intel.com>
Date: Fri, 3 Feb 2012 18:07:42 +0000 (-0800)
Subject: Print NULL for zero address in sys_mmap64
X-Git-Tag: v4.7~178
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=d0cd4436b0b174b0de59379f47dc20a2a75bf70a;p=strace

Print NULL for zero address in sys_mmap64

* mem.c (sys_mmap64): Print NULL for zero address so that it is
consistent with sys_mmap.
---

diff --git a/mem.c b/mem.c
index e440e9ff..7fdd384e 100644
--- a/mem.c
+++ b/mem.c
@@ -352,7 +352,10 @@ sys_mmap64(struct tcb *tcp)
 			return 0;
 #endif
 		/* addr */
-		tprintf("%#lx, ", u_arg[0]);
+		if (!u_arg[0])
+			tprints("NULL, ");
+		else
+			tprintf("%#lx, ", u_arg[0]);
 		/* len */
 		tprintf("%lu, ", u_arg[1]);
 		/* prot */