1 // RUN: %clang_cc1 -Wstrlcpy-strlcat-size -verify -fsyntax-only %s
2 
3 typedef __SIZE_TYPE__ size_t;
4 size_t strlcpy (char * restrict dst, const char * restrict src, size_t size);
5 size_t strlcat (char * restrict dst, const char * restrict src, size_t size);
6 size_t strlen (const char *s);
7 
8 char s1[100];
9 char s2[200];
10 char * s3;
11 
12 struct {
13   char f1[100];
14   char f2[100][3];
15 } s4, **s5;
16 
17 int x;
18 
f(void)19 void f(void)
20 {
21   strlcpy(s1, s2, sizeof(s1)); // no warning
22   strlcpy(s1, s2, sizeof(s2)); // expected-warning {{size argument in 'strlcpy' call appears to be size of the source; expected the size of the destination}} expected-note {{change size argument to be the size of the destination}}
23   strlcpy(s1, s3, strlen(s3)+1); // expected-warning {{size argument in 'strlcpy' call appears to be size of the source; expected the size of the destination}} expected-note {{change size argument to be the size of the destination}}
24   strlcat(s2, s3, sizeof(s3)); // expected-warning {{size argument in 'strlcat' call appears to be size of the source; expected the size of the destination}} expected-note {{change size argument to be the size of the destination}}
25   strlcpy(s4.f1, s2, sizeof(s2)); // expected-warning {{size argument in 'strlcpy' call appears to be size of the source; expected the size of the destination}} expected-note {{change size argument to be the size of the destination}}
26   strlcpy((*s5)->f2[x], s2, sizeof(s2)); // expected-warning {{size argument in 'strlcpy' call appears to be size of the source; expected the size of the destination}} expected-note {{change size argument to be the size of the destination}}
27   strlcpy(s1+3, s2, sizeof(s2)); // expected-warning {{size argument in 'strlcpy' call appears to be size of the source; expected the size of the destination}}
28 }
29 
30 // Don't issue FIXIT for flexible arrays.
31 struct S {
32   int y;
33   char x[];
34 };
35 
flexible_arrays(struct S * s)36 void flexible_arrays(struct S *s) {
37   char str[] = "hi";
38   strlcpy(s->x, str, sizeof(str));  // expected-warning {{size argument in 'strlcpy' call appears to be size of the source; expected the size of the destination}}
39 }
40 
41 // Don't issue FIXIT for destinations of size 1.
size_1()42 void size_1() {
43   char z[1];
44   char str[] = "hi";
45 
46   strlcpy(z, str, sizeof(str));  // expected-warning {{size argument in 'strlcpy' call appears to be size of the source; expected the size of the destination}}
47 }
48 
49 // Support VLAs.
vlas(int size)50 void vlas(int size) {
51   char z[size];
52   char str[] = "hi";
53 
54   strlcpy(z, str, sizeof(str)); // expected-warning {{size argument in 'strlcpy' call appears to be size of the source; expected the size of the destination}} expected-note {{change size argument to be the size of the destination}}
55 }
56