From 714dc22ccb12efdc203e8ce92d6e546ca9ffb157 Mon Sep 17 00:00:00 2001
From: Luca Dariz <l.dariz@imamoter.cnr.t>
Date: Thu, 20 Nov 2014 12:41:12 +0100
Subject: refactor integer overflow detection, add signed int
Instead of checking for every possible casse which result in overflow,
it is much simpler to perform the operation using integers with bigger
dimension and check if the result overflow
---
test/Feature/ubsan_uadd_overflow.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
create mode 100644 test/Feature/ubsan_uadd_overflow.c
(limited to 'test/Feature/ubsan_uadd_overflow.c')
diff --git a/test/Feature/ubsan_uadd_overflow.c b/test/Feature/ubsan_uadd_overflow.c
new file mode 100644
index 00000000..9dc6832d
--- /dev/null
+++ b/test/Feature/ubsan_uadd_overflow.c
@@ -0,0 +1,19 @@
+// RUN: %llvmgcc %s -fsanitize=unsigned-integer-overflow -emit-llvm -g -O0 -c -o %t.bc
+// RUN: %klee %t.bc 2> %t.log
+// RUN: grep -c "overflow on unsigned addition" %t.log
+// RUN: grep -c "ubsan_uadd_overflow.c:16: overflow" %t.log
+
+#include "klee/klee.h"
+
+int main()
+{
+ unsigned int x;
+ unsigned int y;
+ volatile unsigned int result;
+
+ klee_make_symbolic(&x, sizeof(x), "unsigned add 1");
+ klee_make_symbolic(&y, sizeof(y), "unsigned add 2");
+ result = x + y;
+
+ return 0;
+}
--
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