1
2#include <pthread.h>
3#include <unistd.h>
4#include <assert.h>
5#include <signal.h>
6
7/* Should see 3 threads exiting in different ways, all holding one (or
8   two) locks. */
9
10pthread_mutex_t mxC1  = PTHREAD_MUTEX_INITIALIZER;
11pthread_mutex_t mxC2  = PTHREAD_MUTEX_INITIALIZER;
12pthread_mutex_t mxC2b = PTHREAD_MUTEX_INITIALIZER;
13pthread_mutex_t mxP   = PTHREAD_MUTEX_INITIALIZER;
14
15/* This one exits in the normal way, by joining back */
16void* child_fn1 ( void* arg )
17{
18  int r= pthread_mutex_lock( &mxC1 ); assert(!r);
19  return NULL;
20}
21
22/* This one detaches, does its own thing. */
23void* child_fn2 ( void* arg )
24{
25  int r;
26  r= pthread_mutex_lock( &mxC2 ); assert(!r);
27  r= pthread_mutex_lock( &mxC2b ); assert(!r);
28  r= pthread_detach( pthread_self() ); assert(!r);
29  return NULL;
30}
31
32/* Parent creates 2 children, takes a lock, waits, segfaults.  Use
33   sleeps to enforce exit ordering, for repeatable regtesting. */
34int main ( void )
35{
36   int r;
37   pthread_t child1, child2;
38
39   r= pthread_create(&child2, NULL, child_fn2, NULL); assert(!r);
40   sleep(1);
41
42   r= pthread_create(&child1, NULL, child_fn1, NULL); assert(!r);
43   r= pthread_join(child1, NULL); assert(!r);
44   sleep(1);
45
46   r= pthread_mutex_lock( &mxP );
47
48   kill( getpid(), SIGABRT );
49   return 0;
50}
51