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 #include <algorithm>
10 #include <cstdio>
11 #include <cstdlib>
12 #include <__threading_support>
13 #include <unistd.h>
14
15 #include "../src/cxa_exception.h"
16
17 #include "test_macros.h"
18
19 typedef __cxxabiv1::__cxa_eh_globals globals_t ;
20
thread_code(void * parm)21 void *thread_code (void *parm) {
22 size_t *result = (size_t *) parm;
23 globals_t *glob1, *glob2;
24
25 glob1 = __cxxabiv1::__cxa_get_globals ();
26 if ( NULL == glob1 )
27 std::printf("Got null result from __cxa_get_globals\n");
28
29 glob2 = __cxxabiv1::__cxa_get_globals_fast ();
30 if ( glob1 != glob2 )
31 std::printf("Got different globals!\n");
32
33 *result = (size_t) glob1;
34 #ifndef TEST_HAS_NO_THREADS
35 sleep ( 1 );
36 #endif
37 return parm;
38 }
39
40 #ifndef TEST_HAS_NO_THREADS
41 #define NUMTHREADS 10
42 size_t thread_globals [ NUMTHREADS ] = { 0 };
43 std::__libcpp_thread_t threads [ NUMTHREADS ];
44 #endif
45
main()46 int main() {
47 #ifndef TEST_HAS_NO_THREADS
48 // Make the threads, let them run, and wait for them to finish
49 for ( int i = 0; i < NUMTHREADS; ++i )
50 std::__libcpp_thread_create ( threads + i, thread_code, (void *) (thread_globals + i));
51 for ( int i = 0; i < NUMTHREADS; ++i )
52 std::__libcpp_thread_join ( &threads [ i ] );
53
54 int retVal = 0;
55 for ( int i = 0; i < NUMTHREADS; ++i ) {
56 if ( 0 == thread_globals [ i ] ) {
57 std::printf("Thread #%d had a zero global\n", i);
58 retVal = 1;
59 }
60 }
61
62 std::sort ( thread_globals, thread_globals + NUMTHREADS );
63 for ( int i = 1; i < NUMTHREADS; ++i ) {
64 if ( thread_globals [ i - 1 ] == thread_globals [ i ] ) {
65 std::printf("Duplicate thread globals (%d and %d)\n", i-1, i);
66 retVal = 2;
67 }
68 }
69 return retVal;
70 #else // TEST_HAS_NO_THREADS
71 size_t thread_globals;
72 thread_code(&thread_globals);
73 // Check that __cxa_get_globals() is not NULL.
74 return (thread_globals == 0) ? 1 : 0;
75 #endif // !TEST_HAS_NO_THREADS
76 }
77