1/* This testcase is part of GDB, the GNU debugger.
2
3   Copyright 2015-2020 Free Software Foundation, Inc.
4
5   This program is free software; you can redistribute it and/or modify
6   it under the terms of the GNU General Public License as published by
7   the Free Software Foundation; either version 3 of the License, or
8   (at your option) any later version.
9
10   This program is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13   GNU General Public License for more details.
14
15   You should have received a copy of the GNU General Public License
16   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
17
18#include <assert.h>
19#include <pthread.h>
20#include <unistd.h>
21#include <setjmp.h>
22
23/* Number of threads.  */
24#define NTHREADS 10
25
26/* When set, threads exit.  */
27volatile int break_out;
28
29pthread_barrier_t barrier;
30
31/* Entry point for threads that setjmp/longjmp.  */
32
33static void *
34thread_longjmp (void *arg)
35{
36  jmp_buf env;
37
38  pthread_barrier_wait (&barrier);
39
40  while (!break_out)
41    {
42      if (setjmp (env) == 0)
43	longjmp (env, 1);
44
45      usleep (1);
46    }
47  return NULL;
48}
49
50/* Entry point for threads that try/catch.  */
51
52static void *
53thread_try_catch (void *arg)
54{
55  volatile unsigned int counter = 0;
56
57  pthread_barrier_wait (&barrier);
58
59  while (!break_out)
60    {
61      try
62	{
63	  throw 1;
64	}
65      catch (...)
66	{
67	  counter++;
68	}
69
70      usleep (1);
71    }
72  return NULL;
73}
74
75int
76main (void)
77{
78  pthread_t threads[NTHREADS];
79  int i;
80  int ret;
81
82  /* Don't run forever.  */
83  alarm (180);
84
85  pthread_barrier_init (&barrier, NULL, NTHREADS + 1);
86
87  for (i = 0; i < NTHREADS; i++)
88    {
89      /* Half of the threads does setjmp/longjmp, the other half does
90	 try/catch.  */
91      if ((i % 2) == 0)
92	ret = pthread_create (&threads[i], NULL, thread_longjmp , NULL);
93      else
94	ret = pthread_create (&threads[i], NULL, thread_try_catch , NULL);
95      assert (ret == 0);
96    }
97
98  /* Wait until all threads are running.  */
99  pthread_barrier_wait (&barrier);
100
101#define LINE usleep (1)
102
103  /* The other thread's setjmp/longjmp/try/catch should not disturb
104     this thread's stepping over these lines.  */
105
106  LINE; /* set break here */
107  LINE; /* line 1 */
108  LINE; /* line 2 */
109  LINE; /* line 3 */
110  LINE; /* line 4 */
111  LINE; /* line 5 */
112  LINE; /* line 6 */
113  LINE; /* line 7 */
114  LINE; /* line 8 */
115  LINE; /* line 9 */
116  LINE; /* line 10 */
117
118  break_out = 1;
119
120  for (i = 0; i < NTHREADS; i++)
121    {
122      ret = pthread_join (threads[i], NULL);
123      assert (ret == 0);
124    }
125
126  return 0;
127}
128