1 files changed, 8 insertions, 0 deletions
diff --git a/llvm_mode/afl-clang-fast.c b/llvm_mode/afl-clang-fast.c
index 1baa3ea6..3dd4acd3 100644
--- a/llvm_mode/afl-clang-fast.c
+++ b/llvm_mode/afl-clang-fast.c
@@ -299,6 +299,14 @@ static void edit_params(u32 argc, char** argv) {
       cc_params[cc_par_cnt++] = "-fsanitize=memory";
 
     }
+    
+    if (getenv("AFL_USE_UBSAN")) {
+    
+      cc_params[cc_par_cnt++] = "-fsanitize=undefined";
+      cc_params[cc_par_cnt++] = "-fsanitize-undefined-trap-on-error";
+      cc_params[cc_par_cnt++] = "-fno-sanitize-recover=all";
+      
+    }
 
   }