[libcxxabi] Introduce a -fno-exceptions libc++abi libary variant
Currently there is only support for a -fno-exceptions libc++ build. This is
problematic for functions such as std::terminate() which are defined in
libc++abi and using any of those functions throws away most of the benefits
of using -fno-exceptions (code-size). This patch introduces a -fno-exceptions
libc++abi build to address this issue.
This new variant of libc++abi cannot be linked against any with-exceptions
code as some symbols necessary for handling exceptions are missing in this
library.
Differential revision: http://reviews.llvm.org/D20677
Reviewers: EricWF, mclow.lists, bcraig
git-svn-id: https://llvm.org/svn/llvm-project/libcxxabi/trunk@271267 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/src/cxa_aux_runtime.cpp b/src/cxa_aux_runtime.cpp
index a455fad..bb7c9f1 100644
--- a/src/cxa_aux_runtime.cpp
+++ b/src/cxa_aux_runtime.cpp
@@ -17,16 +17,28 @@
namespace __cxxabiv1 {
extern "C" {
_LIBCXXABI_FUNC_VIS LIBCXXABI_NORETURN void __cxa_bad_cast(void) {
+#ifndef _LIBCXXABI_NO_EXCEPTIONS
throw std::bad_cast();
+#else
+ std::terminate();
+#endif
}
_LIBCXXABI_FUNC_VIS LIBCXXABI_NORETURN void __cxa_bad_typeid(void) {
+#ifndef _LIBCXXABI_NO_EXCEPTIONS
throw std::bad_typeid();
+#else
+ std::terminate();
+#endif
}
_LIBCXXABI_FUNC_VIS LIBCXXABI_NORETURN void
__cxa_throw_bad_array_new_length(void) {
+#ifndef _LIBCXXABI_NO_EXCEPTIONS
throw std::bad_array_new_length();
+#else
+ std::terminate();
+#endif
}
} // extern "C"
} // abi