none/tests/solaris/context_link2.c

   1 /* Test of correct simulation for uc->uc_link in a signal handler. */
   2
   3 #include <assert.h>
   4 #include <signal.h>
   5 #include <stdio.h>
   6 #include <ucontext.h>
   7
   8 static void sighandler(int sig, siginfo_t *sip, void *arg)
   9 {
  10    ucontext_t uc2;
  11
  12    /* Current uc_link value has to be equal to (ucontext_t *) arg. */
  13    getcontext(&uc2);
  14    assert(uc2.uc_link == arg);
  15 }
  16
  17 int main(void)
  18 {
  19    ucontext_t uc;
  20    struct sigaction sa;
  21
  22    /* Current uc_link value has to be NULL. */
  23    if (getcontext(&uc)) {
  24       perror("getcontext");
  25       return 1;
  26    }
  27    assert(!uc.uc_link);
  28
  29    sa.sa_sigaction = sighandler;
  30    sa.sa_flags = SA_SIGINFO;
  31    if (sigfillset(&sa.sa_mask)) {
  32       perror("sigfillset");
  33       return 1;
  34    }
  35    if (sigaction(SIGUSR1, &sa, NULL)) {
  36       perror("sigaction");
  37       return 1;
  38    }
  39
  40    raise(SIGUSR1);
  41
  42    /* Current uc_link value has to be NULL. */
  43    getcontext(&uc);
  44    assert(!uc.uc_link);
  45
  46    return 0;
  47 }
  48