libcxxabi/test/uncaught_exception.pass.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
   9 // UNSUPPORTED: no-exceptions
  10
  11 // This tests that libc++abi still provides __cxa_uncaught_exception() for
  12 // ABI compatibility, even though the Standard doesn't require it to.
  13
  14 // __cxa_uncaught_exception was not re-exported from libc++ previously. This leads
  15 // to undefined symbols when linking against a libc++ that re-exports the symbols,
  16 // but running against a libc++ that doesn't. Fortunately, usage of __cxa_uncaught_exception()
  17 // in the wild seems to be close to non-existent.
  18 // XFAIL: using-built-library-before-llvm-19
  19
  20 #include <cxxabi.h>
  21 #include <cassert>
  22
  23 // namespace __cxxabiv1 {
  24 //      extern bool __cxa_uncaught_exception () throw();
  25 // }
  26
  27 struct A {
  28     ~A() { assert( __cxxabiv1::__cxa_uncaught_exception()); }
  29 };
  30
  31 int main () {
  32     try { A a; throw 3; assert(false); }
  33     catch (int) {}
  34 }