regress/lib/libpthread/siglongjmp1/siglongjmp1.c

   1 /*      $NetBSD:$       */
   2
   3 /*
   4  * Regression test for siglongjmp out of a signal handler back into
   5  * its thread.
   6  *
   7  * Written by Christian Limpach <cl@NetBSD.org>, December 2003.
   8  * Public domain.
   9  */
  10
  11 #include <err.h>
  12 #include <pthread.h>
  13 #include <setjmp.h>
  14 #include <signal.h>
  15 #include <unistd.h>
  16
  17 #include <sys/resource.h>
  18
  19 void *thread(void *);
  20 void handler(int, siginfo_t *, void *);
  21 static sigjmp_buf env;
  22
  23 void *
  24 thread(void *arg)
  25 {
  26         return NULL;
  27 }
  28
  29 void
  30 handler(int sig, siginfo_t *info, void *ctx)
  31 {
  32         siglongjmp(env, 1);
  33 }
  34
  35 int
  36 main(int argc, char **argv)
  37 {
  38         pthread_t t;
  39         sigset_t nset;
  40         struct rlimit rlim;
  41         struct sigaction act;
  42
  43         rlim.rlim_cur = rlim.rlim_max = 0;
  44         (void)setrlimit(RLIMIT_CORE, &rlim);
  45
  46         pthread_create(&t, NULL, thread, NULL);
  47
  48         sigemptyset(&nset);
  49         sigaddset(&nset, SIGUSR1);
  50         pthread_sigmask(SIG_SETMASK, &nset, NULL);
  51
  52         act.sa_sigaction = handler;
  53         sigemptyset(&act.sa_mask);
  54         sigaddset(&act.sa_mask, SIGUSR2);
  55         act.sa_flags = 0;
  56         sigaction(SIGSEGV, &act, NULL);
  57
  58         if (sigsetjmp(env, 1) == 0)
  59                 *(long *)0 = 0;
  60
  61         pthread_sigmask(0, NULL, &nset);
  62
  63         if (sigismember(&nset, SIGSEGV))
  64                 errx(1, "SIGSEGV set");
  65         if (sigismember(&nset, SIGUSR2))
  66                 errx(1, "SIGUSR2 set");
  67         if (!sigismember(&nset, SIGUSR1))
  68                 errx(1, "SIGUSR1 not set");
  69
  70         return 0;
  71 }
  72