1 // RUN: %clang_cc1 -Wmemset-transposed-args -verify %s
2 // RUN: %clang_cc1 -xc++ -Wmemset-transposed-args -verify %s
3
4 #define memset(...) __builtin_memset(__VA_ARGS__)
5 #define bzero(x,y) __builtin_memset(x, 0, y)
6 #define real_bzero(x,y) __builtin_bzero(x,y)
7
8 int array[10];
9 int *ptr;
10
main()11 int main() {
12 memset(array, sizeof(array), 0); // expected-warning{{'size' argument to memset is '0'; did you mean to transpose the last two arguments?}} expected-note{{parenthesize the third argument to silence}}
13 memset(array, sizeof(array), 0xff); // expected-warning{{setting buffer to a 'sizeof' expression; did you mean to transpose the last two arguments?}} expected-note{{cast the second argument to 'int' to silence}} expected-warning{{'memset' will always overflow; destination buffer has size 40, but size argument is 255}}
14 memset(ptr, sizeof(ptr), 0); // expected-warning{{'size' argument to memset is '0'; did you mean to transpose the last two arguments?}} expected-note{{parenthesize the third argument to silence}}
15 memset(ptr, sizeof(*ptr) * 10, 1); // expected-warning{{setting buffer to a 'sizeof' expression; did you mean to transpose the last two arguments?}} expected-note{{cast the second argument to 'int' to silence}}
16 memset(ptr, 10 * sizeof(int *), 1); // expected-warning{{setting buffer to a 'sizeof' expression; did you mean to transpose the last two arguments?}} expected-note{{cast the second argument to 'int' to silence}}
17 memset(ptr, 10 * sizeof(int *) + 10, 0xff); // expected-warning{{setting buffer to a 'sizeof' expression; did you mean to transpose the last two arguments?}} expected-note{{cast the second argument to 'int' to silence}}
18 memset(ptr, sizeof(char) * sizeof(int *), 0xff); // expected-warning{{setting buffer to a 'sizeof' expression; did you mean to transpose the last two arguments?}} expected-note{{cast the second argument to 'int' to silence}}
19 memset(array, sizeof(array), sizeof(array)); // Uh... fine I guess.
20 memset(array, 0, sizeof(array));
21 memset(ptr, 0, sizeof(int *) * 10);
22 memset(array, (int)sizeof(array), (0)); // no warning
23 memset(array, (int)sizeof(array), 32); // no warning
24 memset(array, 32, (0)); // no warning
25 memset(array, 0, 0); // no warning
26
27 bzero(ptr, 0); // expected-warning{{'size' argument to bzero is '0'}} expected-note{{parenthesize the second argument to silence}}
28 real_bzero(ptr, 0); // expected-warning{{'size' argument to bzero is '0'}} expected-note{{parenthesize the second argument to silence}}
29 }
30
macros()31 void macros() {
32 #define ZERO 0
33 int array[10];
34 memset(array, 0xff, ZERO); // no warning
35 // Still emit a diagnostic for memsetting a sizeof expression:
36 memset(array, sizeof(array), ZERO); // expected-warning{{'sizeof'}} expected-note{{cast}}
37 bzero(array, ZERO); // no warning
38 real_bzero(array, ZERO); // no warning
39 #define NESTED_DONT_DIAG \
40 memset(array, 0xff, ZERO); \
41 real_bzero(array, ZERO);
42
43 NESTED_DONT_DIAG;
44
45 #define NESTED_DO_DIAG \
46 memset(array, 0xff, 0); \
47 real_bzero(array, 0)
48
49 NESTED_DO_DIAG; // expected-warning{{'size' argument to memset}} expected-warning{{'size' argument to bzero}} expected-note2{{parenthesize}}
50
51 #define FN_MACRO(p) \
52 memset(array, 0xff, p)
53
54 FN_MACRO(ZERO);
55 FN_MACRO(0); // FIXME: should we diagnose this?
56
57 __builtin_memset(array, 0, ZERO); // no warning
58 __builtin_bzero(array, ZERO);
59 __builtin_memset(array, 1, 0); // expected-warning{{'size' argument to memset}} // expected-note{{parenthesize}}
60 __builtin_bzero(array, 0); // expected-warning{{'size' argument to bzero}} // expected-note{{parenthesize}}
61 }
62