1  /* Example of a bad call within a signal handler with replacement
       2     alternative.  'handler' calls 'exit', and 'exit' is not allowed
       3     from a signal handler.  But '_exit' is allowed.  */
       4  /* { dg-require-effective-target signal } */
       5  
       6  #include <signal.h>
       7  #include <stdlib.h>
       8  
       9  extern void body_of_program(void);
      10  
      11  static void handler(int signum)
      12  {
      13    exit(1); /* { dg-warning "call to 'exit' from within signal handler" "warning" } */
      14    /* { dg-message "note: '_exit' is a possible signal-safe alternative for 'exit'" "replacement note" { target *-*-* } .-1 } */
      15  }
      16  
      17  int main(int argc, const char *argv)
      18  {
      19    signal(SIGINT, handler); /* { dg-message "registering 'handler' as signal handler" } */
      20  
      21    body_of_program();
      22  
      23    return 0;
      24  }