drd/tests/concurrent_close.cpp

   1 /*
   2  * Reproducer for bug #323905. See also
   3  * http://bugs.kde.org/show_bug.cgi?id=323905.
   4  */
   5
   6 #include <climits>    /* PTHREAD_STACK_MIN */
   7 #include <cstdio>     /* fprintf() */
   8 #include <fcntl.h>    /* O_RDONLY */
   9 #include <pthread.h>
  10 #include <unistd.h>   /* close() */
  11
  12 /* Happens with two threads also */
  13 #define THREAD_COUNT 256
  14
  15 void* thread(void*)
  16 {
  17   int fd;
  18
  19   /* Happens with any file, not just /dev/null */
  20   fd = open("/dev/null", O_RDONLY);
  21   if (fd >= 0)
  22     close(fd);
  23   else
  24     fprintf(stderr, "Failed to open /dev/null\n");
  25   return 0;
  26 }
  27
  28 int main()
  29 {
  30   int i, r;
  31   pthread_attr_t attr;
  32   pthread_t threads[THREAD_COUNT];
  33
  34   pthread_attr_init(&attr);
  35   pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN);
  36   for (i = 0; i < THREAD_COUNT; ++i) {
  37     r = pthread_create(&threads[i], &attr, thread, 0);
  38     if (r != 0) {
  39       fprintf(stderr, "Failed to create thread %d\n", i);
  40       return 1;
  41     }
  42   }
  43   pthread_attr_destroy(&attr);
  44   for (i = 0; i < THREAD_COUNT; ++i) {
  45     r = pthread_join(threads[i], 0);
  46     if (r != 0) {
  47       fprintf(stderr, "Failed to join thread %d\n", i);
  48       return 1;
  49     }
  50   }
  51   fprintf(stderr, "Done.\n");
  52   return 0;
  53 }