Fortity test suite

Compile tests with _LIBCPP_ENABLE_ASSERTIONS and _GLIBCXX_ASSERTIONS,
and _FORTITY_SOURCE allow standard libraries to perform additional checks.

tests/CMakeLists.txt

@@ -37,7 +37,10 @@ macro(configure_tests target)
     target_compile_definitions(${target} PRIVATE
         # Somewhat speed up Catch2 compile times
         CATCH_CONFIG_FAST_COMPILE
-        # Enable assertions for more thorough tests
+        # Fortify test suite for more thorough checks
+        _FORTIFY_SOURCE=3
+        _GLIBCXX_ASSERTIONS
+        _LIBCPP_ENABLE_ASSERTIONS=1
         GFX_TIMSORT_ENABLE_ASSERT
     )
 
@@ -85,6 +88,7 @@ endmacro()
 # Tests that can run with C++98
 add_executable(cxx_98_tests
     cxx_98_tests.cpp
+    verbose_abort.cpp
 )
 configure_tests(cxx_98_tests)
 target_compile_features(cxx_98_tests PRIVATE cxx_std_98)
@@ -93,20 +97,23 @@ target_compile_features(cxx_98_tests PRIVATE cxx_std_98)
 add_executable(cxx_11_tests
     merge_cxx_11_tests.cpp
     cxx_11_tests.cpp
+    verbose_abort.cpp
 )
 configure_tests(cxx_11_tests)
 target_compile_features(cxx_11_tests PRIVATE cxx_std_11)
 
 # Tests requiring C++17 support
 add_executable(cxx_17_tests
     cxx_17_tests.cpp
+    verbose_abort.cpp
 )
 configure_tests(cxx_17_tests)
 target_compile_features(cxx_17_tests PRIVATE cxx_std_17)
 
 # Tests requiring C++20 support
 add_executable(cxx_20_tests
     cxx_20_tests.cpp
+    verbose_abort.cpp
 )
 configure_tests(cxx_20_tests)
 target_compile_features(cxx_20_tests PRIVATE cxx_std_20)

tests/verbose_abort.cpp

@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2024 Morwenn.
+ *
+ * SPDX-License-Identifier: MIT
+ */
+#include <version>
+
+#ifdef _LIBCPP_VERSION
+#if defined(_LIBCPP_ENABLE_ASSERTIONS) && _LIBCPP_ENABLE_ASSERTIONS
+
+#include <cstdarg>
+#include <cstdio>
+#include <cstdlib>
+
+namespace std::inline __1
+{
+    /*
+     * Required to avoid linking issues with AppleClang when
+     * compiling with _LIBCPP_ENABLE_ASSERTIONS.
+     * See https://releases.llvm.org/16.0.0/projects/libcxx/docs/UsingLibcxx.html#enabling-the-safe-libc-mode
+     */
+    [[noreturn]]
+    void __libcpp_verbose_abort(char const* format, ...) {
+        std::va_list list;
+        va_start(list, format);
+        std::vfprintf(stderr, format, list);
+        va_end(list);
+
+        std::abort();
+    }
+    }
+
+#endif
+#endif