libcxxabi/src/cxa_noexception.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //
   8 //  This file implements the "Exception Handling APIs"
   9 //  https://itanium-cxx-abi.github.io/cxx-abi/abi-eh.html
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 // Support functions for the no-exceptions libc++ library
  14
  15 #include "cxxabi.h"
  16
  17 #include <exception>        // for std::terminate
  18 #include "cxa_exception.h"
  19 #include "cxa_handlers.h"
  20
  21 namespace __cxxabiv1 {
  22
  23 extern "C" {
  24
  25 void
  26 __cxa_increment_exception_refcount(void *thrown_object) throw() {
  27     if (thrown_object != nullptr)
  28         std::terminate();
  29 }
  30
  31 void
  32 __cxa_decrement_exception_refcount(void *thrown_object) throw() {
  33     if (thrown_object != nullptr)
  34       std::terminate();
  35 }
  36
  37
  38 void *__cxa_current_primary_exception() throw() { return nullptr; }
  39
  40 void
  41 __cxa_rethrow_primary_exception(void* thrown_object) {
  42     if (thrown_object != nullptr)
  43       std::terminate();
  44 }
  45
  46 bool
  47 __cxa_uncaught_exception() throw() { return false; }
  48
  49 unsigned int
  50 __cxa_uncaught_exceptions() throw() { return 0; }
  51
  52 } // extern "C"
  53
  54 // provide dummy implementations for the 'no exceptions' case.
  55 uint64_t __getExceptionClass  (const _Unwind_Exception*)           { return 0; }
  56 void     __setExceptionClass  (      _Unwind_Exception*, uint64_t) {}
  57 bool     __isOurExceptionClass(const _Unwind_Exception*)           { return false; }
  58
  59 }  // abi