gcc/testsuite/gcc.dg/nonnull-1.c

   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 }