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 8extern void func1 (char *, char *, int) __attribute__((nonnull)); 9 10extern void func2 (char *, char *) __attribute__((nonnull(1))); 11 12extern void func3 (char *, int, char *, int) 13 __attribute__((nonnull(1,3))); 14 15extern void func4 (char *, char *) __attribute__((nonnull(1))) 16 __attribute__((nonnull(2))); 17 18void 19foo (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} 40