From 714dc22ccb12efdc203e8ce92d6e546ca9ffb157 Mon Sep 17 00:00:00 2001 From: Luca Dariz 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_smul_overflow.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) create mode 100644 test/Feature/ubsan_smul_overflow.c (limited to 'test/Feature/ubsan_smul_overflow.c') diff --git a/test/Feature/ubsan_smul_overflow.c b/test/Feature/ubsan_smul_overflow.c new file mode 100644 index 00000000..21a796cb --- /dev/null +++ b/test/Feature/ubsan_smul_overflow.c @@ -0,0 +1,19 @@ +// RUN: %llvmgcc %s -fsanitize=signed-integer-overflow -emit-llvm -g -O0 -c -o %t.bc +// RUN: %klee %t.bc 2> %t.log +// RUN: grep -c "overflow on unsigned multiplication" %t.log +// RUN: grep -c "ubsan_smul_overflow.c:16: overflow" %t.log + +#include "klee/klee.h" + +int main() +{ + int x; + int y; + volatile int result; + + klee_make_symbolic(&x, sizeof(x), "signed mul 1"); + klee_make_symbolic(&y, sizeof(y), "signed mul 2"); + result = x * y; + + return 0; +} -- cgit 1.4.1