Hide testing override functions from symbol table

Author: Easton97-Jens

src/operators/libinjection_adapter.h

@@ -22,16 +22,25 @@
 
 namespace modsecurity::operators {
 
+// Keep testing override hooks out of the shared-library dynamic symbol table.
+#if defined(__GNUC__) || defined(__clang__)
+#define MODSEC_HIDDEN __attribute__((visibility("hidden")))
+#else
+#define MODSEC_HIDDEN
+#endif
+
 using DetectSQLiFn = injection_result_t (*)(const char *, size_t, char *);
 using DetectXSSFn = injection_result_t (*)(const char *, size_t);
 
 injection_result_t runLibinjectionSQLi(const char *input, size_t len,
     char *fingerprint);
 injection_result_t runLibinjectionXSS(const char *input, size_t len);
 
-void setLibinjectionSQLiOverrideForTesting(DetectSQLiFn fn);
-void setLibinjectionXSSOverrideForTesting(DetectXSSFn fn);
-void clearLibinjectionOverridesForTesting();
+MODSEC_HIDDEN void setLibinjectionSQLiOverrideForTesting(DetectSQLiFn fn);
+MODSEC_HIDDEN void setLibinjectionXSSOverrideForTesting(DetectXSSFn fn);
+MODSEC_HIDDEN void clearLibinjectionOverridesForTesting();
+
+#undef MODSEC_HIDDEN
 
 }  // namespace modsecurity::operators