memcheck/tests/post-syscall.c

   1 #include <time.h>
   2 #include <unistd.h>
   3 #include <stdio.h>
   4 #include <errno.h>
   5 #include <signal.h>
   6
   7 #include "../memcheck.h"
   8
   9 /* Check that a syscall's POST function gets called if it completes
  10    due to being interrupted.  nanosleep is used here, because it
  11    writes a result even if it fails.  wait*() could also be used,
  12    because they successfully complete if interrupted by SIGCHLD.
  13  */
  14 static void handler(int s)
  15 {
  16 }
  17
  18 int main()
  19 {
  20         struct timespec req, rem;
  21         int ret;
  22
  23         req.tv_sec = 2;
  24         req.tv_nsec = 0;
  25
  26         signal(SIGALRM, handler);
  27
  28         alarm(1);
  29         ret = nanosleep(&req, &rem);
  30
  31         if (ret != -1 || errno != EINTR) {
  32                 fprintf(stderr, "FAILED: expected nanosleep to be interrupted\n");
  33         } else {
  34                 (void) VALGRIND_CHECK_VALUE_IS_DEFINED(rem);
  35                 fprintf(stderr, "PASSED\n"); /* assuming CHECK_VALUE_IS_DEFINED doesn't print anything */
  36         }
  37
  38         return 0;
  39 }