Codecov - cover MT code in XMSS_PrivateKey

Codecov does not reach all parts of the `XMSS_PrivateKey` code because too few
cores are detected during the CI run. To cover the missed codepaths always
return a large enough core count if botan is compiled with coverage.

2 files changed, 12 insertions, 0 deletions

diff --git a/src/build-data/buildh.in b/src/build-data/buildh.in
index 807b6f479..594eab9c8 100644
--- a/src/build-data/buildh.in
+++ b/src/build-data/buildh.in
@@ -56,6 +56,10 @@
 #define BOTAN_HAS_SANITIZER_%{i|upper}
 %{endfor}
 
+%{if build_coverage}
+#define BOTAN_HAS_COVERAGE
+%{endif}
+
 #define BOTAN_TARGET_ARCH_IS_%{arch|upper}
 %{if endian}
 #define BOTAN_TARGET_CPU_IS_%{endian|upper}_ENDIAN
diff --git a/src/lib/pubkey/xmss/xmss_tools.cpp b/src/lib/pubkey/xmss/xmss_tools.cpp
index f4f762aeb..3297664fb 100644
--- a/src/lib/pubkey/xmss/xmss_tools.cpp
+++ b/src/lib/pubkey/xmss/xmss_tools.cpp
@@ -66,11 +66,19 @@ size_t XMSS_Tools::bench_threads()
 
       if(durations[0].count() < durations[1].count())
          {
+#if defined(BOTAN_HAS_COVERAGE)
+         return 4;
+#else
          return concurrency[0];
+#endif
          }
       else
          {
+#if defined(BOTAN_HAS_COVERAGE)
+         return 4;
+#else
          return concurrency[1];
+#endif
          }
   }