Make tests pass by default in UBSAN mode

- Adds macros to check if botan was compiled with a certain sanitizers.
- Automatically excludes the tests that are intended to provoke undefined
  behaviour from the test bench, when botan is compiled with UBSAN.
- Changes option `--avoid-undefined` to `--no-avoid-undefined` so the
  failing tests can be explicitly activated when needed.

1 files changed, 5 insertions, 2 deletions

diff --git a/src/tests/test_dl_group.cpp b/src/tests/test_dl_group.cpp
index 10a7e3bc6..c9e654bd7 100644
--- a/src/tests/test_dl_group.cpp
+++ b/src/tests/test_dl_group.cpp
@@ -44,16 +44,19 @@ class DL_Group_Tests final : public Test
                             "DL_Group uninitialized",
                             []() { Botan::DL_Group dl; dl.get_p(); });
 
-         if(Test::avoid_undefined_behavior() == false)
+#if defined(BOTAN_HAS_SANITIZER_UNDEFINED)
+         if(Test::no_avoid_undefined_behavior())
             {
+#endif
             result.test_throws("Bad generator param",
                                "Invalid argument DL_Group unknown PrimeType",
                                []() {
                                auto invalid_type = static_cast<Botan::DL_Group::PrimeType>(9);
                                Botan::DL_Group dl(Test::rng(), invalid_type, 1024);
                                });
+#if defined(BOTAN_HAS_SANITIZER_UNDEFINED)
             }
-
+#endif
          return result;
          }