Viewing file:  nonnull-1.c (1.46 KB) -rw-r--r--
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/* Test for the "nonnull" function attribute. */
/* Origin: Jason Thorpe <thorpej@wasabisystems.com> */
/* { dg-do compile } */
/* { dg-options "-Wnonnull" } */
#include <stddef.h>
extern void func1 (char *, char *, int) __attribute__((nonnull));
extern void func2 (char *, char *) __attribute__((nonnull(1)));
extern void func3 (char *, int, char *, int)
__attribute__((nonnull(1,3)));
extern void func4 (char *, char *) __attribute__((nonnull(1)))
__attribute__((nonnull(2)));
void
foo (int i1, int i2, int i3, char *cp1, char *cp2, char *cp3)
{
func1(cp1, cp2, i1);
func1(NULL, cp2, i1); /* { dg-warning "null" "null with argless nonnull 1" } */
func1(cp1, NULL, i1); /* { dg-warning "null" "null with argless nonnull 2" } */
func1(cp1, cp2, 0);
func2(cp1, NULL);
func2(NULL, cp1); /* { dg-warning "null" "null with single explicit nonnull" } */
func3(NULL, i2, cp3, i3); /* { dg-warning "null" "null with explicit nonnull 1" } */
func3(cp3, i2, NULL, i3); /* { dg-warning "null" "null with explicit nonnull 3" } */
func1(i1 ? cp1 : NULL, cp2, i3); /* { dg-warning "null" "null with cond expr rhs" } */
func1(i1 ? NULL : cp1, cp2, i3); /* { dg-warning "null" "null with cond expr lhs" } */
func1(i1 ? (i2 ? cp1 : NULL) : cp2, cp3, i3); /* { dg-warning "null" "null with nested cond expr" } */
func4(NULL, cp1); /* { dg-warning "null" "null with multiple attributes 1" } */
func4(cp1, NULL); /* { dg-warning "null" "null with multiple attributes 2" } */
}
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