1 //===-------------------- test_exception_storage.cpp ----------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 // XFAIL: c++17
11 
12 #include <cstdlib>
13 #include <algorithm>
14 #include <iostream>
15 #include <__threading_support>
16 #include <unistd.h>
17 
18 #include "../src/cxa_exception.hpp"
19 
20 typedef __cxxabiv1::__cxa_eh_globals globals_t ;
21 
thread_code(void * parm)22 void *thread_code (void *parm) {
23     size_t *result = (size_t *) parm;
24     globals_t *glob1, *glob2;
25 
26     glob1 = __cxxabiv1::__cxa_get_globals ();
27     if ( NULL == glob1 )
28         std::cerr << "Got null result from __cxa_get_globals" << std::endl;
29 
30     glob2 = __cxxabiv1::__cxa_get_globals_fast ();
31     if ( glob1 != glob2 )
32         std::cerr << "Got different globals!" << std::endl;
33 
34     *result = (size_t) glob1;
35     sleep ( 1 );
36     return parm;
37     }
38 
39 #ifndef _LIBCXXABI_HAS_NO_THREADS
40 #define NUMTHREADS  10
41 size_t                 thread_globals [ NUMTHREADS ] = { 0 };
42 std::__libcpp_thread_t   threads        [ NUMTHREADS ];
43 #endif
44 
main()45 int main () {
46     int retVal = 0;
47 
48 #ifndef _LIBCXXABI_HAS_NO_THREADS
49 //  Make the threads, let them run, and wait for them to finish
50     for ( int i = 0; i < NUMTHREADS; ++i )
51         std::__libcpp_thread_create ( threads + i, thread_code, (void *) (thread_globals + i));
52     for ( int i = 0; i < NUMTHREADS; ++i )
53         std::__libcpp_thread_join ( &threads [ i ] );
54 
55     for ( int i = 0; i < NUMTHREADS; ++i )
56         if ( 0 == thread_globals [ i ] ) {
57             std::cerr << "Thread #" << i << " had a zero global" << std::endl;
58             retVal = 1;
59             }
60 
61     std::sort ( thread_globals, thread_globals + NUMTHREADS );
62     for ( int i = 1; i < NUMTHREADS; ++i )
63         if ( thread_globals [ i - 1 ] == thread_globals [ i ] ) {
64             std::cerr << "Duplicate thread globals (" << i-1 << " and " << i << ")" << std::endl;
65             retVal = 2;
66             }
67 #else // _LIBCXXABI_HAS_NO_THREADS
68     size_t thread_globals;
69     // Check that __cxa_get_globals() is not NULL.
70     if (thread_code(&thread_globals) == 0) {
71         retVal = 1;
72     }
73 #endif // !_LIBCXXABI_HAS_NO_THREADS
74     return retVal;
75 }
76