[libc++][hardening] In production hardening modes, trap rather than abort

libcxx/test/libcxx/assertions/customize_verbose_abort.compile-time.pass.cpp

@@ -8,6 +8,7 @@
 
 // This compile-time customization requires cross-file macros, which doesn't work with modules.
 // UNSUPPORTED: clang-modules-build
+// REQUIRES: libcpp-hardening-mode=debug
 
 // Make sure that we can customize the verbose termination function at compile-time by
 // defining _LIBCPP_VERBOSE_ABORT ourselves. Note that this does not have any

libcxx/test/libcxx/assertions/customize_verbose_abort.link-time.pass.cpp

@@ -11,6 +11,7 @@
 // We flag uses of the verbose termination function in older dylibs at compile-time to avoid runtime
 // failures when back-deploying.
 // XFAIL: availability-verbose_abort-missing
+// REQUIRES: libcpp-hardening-mode=debug
 
 #include <cstdlib>
 

libcxx/test/libcxx/assertions/default_verbose_abort.pass.cpp

@@ -7,6 +7,7 @@
 //===----------------------------------------------------------------------===//
 
 // Test that the default verbose termination function aborts the program.
+// REQUIRES: libcpp-hardening-mode=debug
 
 #include <csignal>
 #include <cstdlib>