summaryrefslogtreecommitdiffstats
path: root/package/uclibc/0.9.33.2/0042-nice-fix-overflow-checking-in-int_add_no_wrap.patch
diff options
context:
space:
mode:
Diffstat (limited to 'package/uclibc/0.9.33.2/0042-nice-fix-overflow-checking-in-int_add_no_wrap.patch')
-rw-r--r--package/uclibc/0.9.33.2/0042-nice-fix-overflow-checking-in-int_add_no_wrap.patch44
1 files changed, 0 insertions, 44 deletions
diff --git a/package/uclibc/0.9.33.2/0042-nice-fix-overflow-checking-in-int_add_no_wrap.patch b/package/uclibc/0.9.33.2/0042-nice-fix-overflow-checking-in-int_add_no_wrap.patch
deleted file mode 100644
index a6e6349cb8..0000000000
--- a/package/uclibc/0.9.33.2/0042-nice-fix-overflow-checking-in-int_add_no_wrap.patch
+++ /dev/null
@@ -1,44 +0,0 @@
-From e6735556ed0a5e791ea81a015a90c130a0eea060 Mon Sep 17 00:00:00 2001
-From: Xi Wang <xi@mit.edu>
-Date: Wed, 20 Feb 2013 12:45:45 -0500
-Subject: [PATCH] nice: fix overflow checking in int_add_no_wrap()
-
-In C, signed integer overflow is undefined behavior. Many compilers
-optimize away checks like `a + b < a'.
-
-Use safe precondition testing instead.
-
-Signed-off-by: Xi Wang <xi@mit.edu>
-Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
----
- libc/sysdeps/linux/common/nice.c | 10 +++++-----
- 1 file changed, 5 insertions(+), 5 deletions(-)
-
-diff --git a/libc/sysdeps/linux/common/nice.c b/libc/sysdeps/linux/common/nice.c
-index 3694db8..ed39946 100644
---- a/libc/sysdeps/linux/common/nice.c
-+++ b/libc/sysdeps/linux/common/nice.c
-@@ -25,15 +25,15 @@ static __inline__ _syscall1(int, __syscall_nice, int, incr)
-
- static __inline__ int int_add_no_wrap(int a, int b)
- {
-- int s = a + b;
--
- if (b < 0) {
-- if (s > a) s = INT_MIN;
-+ if (a < INT_MIN - b)
-+ return INT_MIN;
- } else {
-- if (s < a) s = INT_MAX;
-+ if (a > INT_MAX - b)
-+ return INT_MAX;
- }
-
-- return s;
-+ return a + b;
- }
-
- static __inline__ int __syscall_nice(int incr)
---
-1.7.10.4
-
OpenPOWER on IntegriCloud