libcxxabi/test/test_exception_storage.pass.cpp

   1 //===-------------------- test_exception_storage.cpp ----------------------===//
   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 #include <cstdlib>
  10 #include <algorithm>
  11 #include <iostream>
  12 #include <__threading_support>
  13 #include <unistd.h>
  14
  15 #include "../src/cxa_exception.h"
  16
  17 typedef __cxxabiv1::__cxa_eh_globals globals_t ;
  18
  19 void *thread_code (void *parm) {
  20     size_t *result = (size_t *) parm;
  21     globals_t *glob1, *glob2;
  22
  23     glob1 = __cxxabiv1::__cxa_get_globals ();
  24     if ( NULL == glob1 )
  25         std::cerr << "Got null result from __cxa_get_globals" << std::endl;
  26
  27     glob2 = __cxxabiv1::__cxa_get_globals_fast ();
  28     if ( glob1 != glob2 )
  29         std::cerr << "Got different globals!" << std::endl;
  30
  31     *result = (size_t) glob1;
  32     sleep ( 1 );
  33     return parm;
  34     }
  35
  36 #ifndef _LIBCXXABI_HAS_NO_THREADS
  37 #define NUMTHREADS  10
  38 size_t                 thread_globals [ NUMTHREADS ] = { 0 };
  39 std::__libcpp_thread_t   threads        [ NUMTHREADS ];
  40 #endif
  41
  42 int main () {
  43     int retVal = 0;
  44
  45 #ifndef _LIBCXXABI_HAS_NO_THREADS
  46 //  Make the threads, let them run, and wait for them to finish
  47     for ( int i = 0; i < NUMTHREADS; ++i )
  48         std::__libcpp_thread_create ( threads + i, thread_code, (void *) (thread_globals + i));
  49     for ( int i = 0; i < NUMTHREADS; ++i )
  50         std::__libcpp_thread_join ( &threads [ i ] );
  51
  52     for ( int i = 0; i < NUMTHREADS; ++i )
  53         if ( 0 == thread_globals [ i ] ) {
  54             std::cerr << "Thread #" << i << " had a zero global" << std::endl;
  55             retVal = 1;
  56             }
  57
  58     std::sort ( thread_globals, thread_globals + NUMTHREADS );
  59     for ( int i = 1; i < NUMTHREADS; ++i )
  60         if ( thread_globals [ i - 1 ] == thread_globals [ i ] ) {
  61             std::cerr << "Duplicate thread globals (" << i-1 << " and " << i << ")" << std::endl;
  62             retVal = 2;
  63             }
  64 #else // _LIBCXXABI_HAS_NO_THREADS
  65     size_t thread_globals;
  66     // Check that __cxa_get_globals() is not NULL.
  67     if (thread_code(&thread_globals) == 0) {
  68         retVal = 1;
  69     }
  70 #endif // !_LIBCXXABI_HAS_NO_THREADS
  71     return retVal;
  72 }