From: Chen Gang <gang.chen.5i5j@gmail.com>
Date: Thu, 22 Jan 2015 16:40:51 +0000 (+0000)
Subject: toplev.c (init_local_tick): Process the failure when read fails for random_seed.
X-Git-Tag: releases/gcc-5.1.0~1456
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0c7990560b5c901884b0c2f5464c3240c0ee02cb;p=thirdparty%2Fgcc.git

toplev.c (init_local_tick): Process the failure when read fails for random_seed.

	* toplev.c (init_local_tick): Process the failure when read
	fails for random_seed.

From-SVN: r220006
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index b636b51d0222..aeddcb8e66ec 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,8 @@
 2015-01-23  Chen Gang  <gang.chen.5i5j@gmail.com>
 
+	* toplev.c (init_local_tick): Process the failure when read
+	fails for random_seed.
+
 	* ubsan.c (ubsan_type_descriptor): Use 'pretty_print' for
 	'pretty_name' to avoid memory overflow.
 
diff --git a/gcc/toplev.c b/gcc/toplev.c
index 7bf177fa9705..15b85e1d2e91 100644
--- a/gcc/toplev.c
+++ b/gcc/toplev.c
@@ -295,7 +295,9 @@ init_local_tick (void)
       int fd = open ("/dev/urandom", O_RDONLY);
       if (fd >= 0)
         {
-          read (fd, &random_seed, sizeof (random_seed));
+          if (read (fd, &random_seed, sizeof (random_seed))
+              != sizeof (random_seed))
+            random_seed = 0;
           close (fd);
         }