Merged @luckyluke's change for detecting overflow of unsigned add, sub

and mul operations.  Refactored tests into two main cases, and
disabled them on LLVM 2.9, which does not support -fsanitized=*signed-integer-overflow.

1 files changed, 4 insertions, 0 deletions

diff --git a/tools/klee/main.cpp b/tools/klee/main.cpp
index 23c07f03..8a246685 100644
--- a/tools/klee/main.cpp
+++ b/tools/klee/main.cpp
@@ -765,6 +765,10 @@ static const char *modelledExternals[] = {
   "_Znwj", 
   "_Znam", 
   "_Znwm", 
+  "__ubsan_handle_add_overflow",
+  "__ubsan_handle_sub_overflow",
+  "__ubsan_handle_mul_overflow",
+  "__ubsan_handle_divrem_overflow",
 };
 // Symbols we aren't going to warn about
 static const char *dontCareExternals[] = {