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268209f3 MS |
1 | /* PR middle-end/91582 - missing heap overflow detection for strcpy |
2 | ||
3 | The -Warray-bounds instances here probably should be replaced by | |
4 | -Wstringop-overflow when it detects these overflows (see also | |
5 | the xfails in Wstringop-overflow-25.c). | |
6 | ||
7 | { dg-do compile } | |
8 | { dg-options "-O2 -Wall -Wno-stringop-overflow -ftrack-macro-expansion=0" } */ | |
9 | ||
10 | #include "range.h" | |
11 | ||
12 | #define INT_MAX __INT_MAX__ | |
13 | #define INT_MIN (-INT_MAX - 1) | |
14 | ||
15 | #define ATTR(...) __attribute__ ((__VA_ARGS__)) | |
16 | #define NOIPA ATTR (noipa) | |
17 | ||
18 | extern void* malloc (size_t); | |
19 | extern char* strcpy (char*, const char*); | |
20 | ||
21 | void sink (void*); | |
22 | ||
23 | #define S36 "0123456789abcdefghijklmnopqrstuvwxyz" | |
24 | #define S(N) (S36 + sizeof S36 - N - 1) | |
25 | ||
26 | struct Flex | |
27 | { | |
28 | char n, ax[]; | |
29 | }; | |
30 | ||
31 | extern struct Flex fx; | |
32 | struct Flex f1 = { 1, { 1 } }; | |
33 | struct Flex f2 = { 2, { 1, 2 } }; | |
34 | struct Flex f3 = { 3, { 1, 2, 3 } }; | |
35 | ||
36 | #define T(src, f) do { \ | |
37 | char *s = src; \ | |
38 | char *d = f.ax; \ | |
39 | strcpy (d, s); \ | |
40 | sink (&f); \ | |
41 | } while (0) | |
42 | ||
43 | NOIPA void test_strcpy_flexarray (void) | |
44 | { | |
7a41fcde MS |
45 | T (S (0), fx); // { dg-bogus "\\\[-Warray-bounds" "pr92815" } |
46 | T (S (9), fx); // { dg-bogus "\\\[-Warray-bounds" "pr92815" } | |
268209f3 MS |
47 | |
48 | T (S (0), f1); | |
49 | T (S (1), f1); // { dg-warning "\\\[-Warray-bounds" } | |
50 | ||
51 | T (S (0), f2); | |
52 | T (S (1), f2); | |
53 | T (S (2), f2); // { dg-warning "\\\[-Warray-bounds" } | |
54 | ||
55 | T (S (0), f3); | |
56 | T (S (2), f3); | |
57 | T (S (3), f3); // { dg-warning "\\\[-Warray-bounds" } | |
58 | T (S (9), f3); // { dg-warning "\\\[-Warray-bounds" } | |
59 | } | |
60 | ||
61 | #undef T | |
62 | #define T(T, src, n) do { \ | |
63 | char *s = src; \ | |
64 | typedef struct { T n, ax[]; } Flex; \ | |
65 | Flex *p = (Flex*)malloc (sizeof *p + n); \ | |
66 | char *d = (char*)p->ax; \ | |
67 | strcpy (d, s); \ | |
68 | sink (p); \ | |
69 | } while (0) | |
70 | ||
71 | NOIPA void test_strcpy_malloc_flexarray (void) | |
72 | { | |
73 | size_t r_0_1 = UR (0, 1); | |
268209f3 MS |
74 | |
75 | T (char, S (0), r_0_1); | |
76 | T (char, S (1), r_0_1); // { dg-warning "\\\[-Warray-bounds" } | |
77 | ||
4e22a7ea MS |
78 | size_t r_1_2 = UR (1, 2); |
79 | ||
268209f3 MS |
80 | T (char, S (0), r_1_2); |
81 | T (char, S (1), r_1_2); | |
82 | T (char, S (2), r_1_2); // { dg-warning "\\\[-Warray-bounds" } | |
83 | ||
4e22a7ea MS |
84 | size_t r_2_3 = UR (2, 3); |
85 | ||
268209f3 MS |
86 | T (char, S (0), r_2_3); |
87 | T (char, S (2), r_2_3); | |
88 | T (char, S (3), r_2_3); // { dg-warning "\\\[-Warray-bounds" } | |
89 | T (char, S (9), r_2_3); // { dg-warning "\\\[-Warray-bounds" } | |
90 | } |