test/fork.m

   1 // TEST_CONFIG
   2
   3 #include "test.h"
   4
   5 void *flushthread(void *arg __unused)
   6 {
   7     while (1) {
   8         _objc_flush_caches(nil);
   9     }
  10 }
  11
  12 int main()
  13 {
  14     pthread_t th;
  15     pthread_create(&th, nil, &flushthread, nil);
  16
  17     alarm(120);
  18
  19     [NSObject self];
  20     [NSObject self];
  21
  22     int max = is_guardmalloc() ? 10: 100;
  23
  24     for (int i = 0; i < max; i++) {
  25         pid_t child;
  26         switch ((child = fork())) {
  27           case -1:
  28             abort();
  29           case 0:
  30             // child
  31             alarm(10);
  32             [NSObject self];
  33             _exit(0);
  34           default: {
  35             // parent
  36             int result = 0;
  37             while (waitpid(child, &result, 0) < 0) {
  38                 if (errno != EINTR) {
  39                     fail("waitpid failed (errno %d %s)",
  40                          errno, strerror(errno));
  41                 }
  42             }
  43             if (!WIFEXITED(result)) {
  44                 fail("child crashed (waitpid result %d)", result);
  45             }
  46
  47             [NSObject self];
  48             break;
  49           }
  50         }
  51     }
  52
  53     succeed(__FILE__ " parent");
  54 }