1  /* Test for the "nonnull" function attribute.  */
       2  /* Origin: Jason Thorpe <thorpej@wasabisystems.com> */
       3  /* { dg-do compile } */
       4  /* { dg-options "-Wnonnull" } */
       5  
       6  #include <stddef.h>
       7  
       8  extern void func1 (char *, char *, int) __attribute__((nonnull));
       9  
      10  extern void func2 (char *, char *) __attribute__((nonnull(1)));
      11  
      12  extern void func3 (char *, int, char *, int)
      13    __attribute__((nonnull(1,3)));
      14  
      15  extern void func4 (char *, char *) __attribute__((nonnull(1)))
      16    __attribute__((nonnull(2)));
      17  
      18  void
      19  foo (int i1, int i2, int i3, char *cp1, char *cp2, char *cp3)
      20  {
      21    func1(cp1, cp2, i1);
      22  
      23    func1(NULL, cp2, i1); /* { dg-warning "null" "null with argless nonnull 1" } */
      24    func1(cp1, NULL, i1); /* { dg-warning "null" "null with argless nonnull 2" } */
      25    func1(cp1, cp2, 0);
      26  
      27    func2(cp1, NULL);
      28    func2(NULL, cp1); /* { dg-warning "null" "null with single explicit nonnull" } */
      29  
      30    func3(NULL, i2, cp3, i3); /* { dg-warning "null" "null with explicit nonnull 1" } */
      31    func3(cp3, i2, NULL, i3); /* { dg-warning "null" "null with explicit nonnull 3" } */
      32  
      33    func1(i1 ? cp1 : NULL, cp2, i3); /* { dg-warning "null" "null with cond expr rhs" } */
      34    func1(i1 ? NULL : cp1, cp2, i3); /* { dg-warning "null" "null with cond expr lhs" } */
      35    func1(i1 ? (i2 ? cp1 : NULL) : cp2, cp3, i3); /* { dg-warning "null" "null with nested cond expr" } */
      36  
      37    func4(NULL, cp1); /* { dg-warning "null" "null with multiple attributes 1" } */
      38    func4(cp1, NULL); /* { dg-warning "null" "null with multiple attributes 2" } */
      39  }