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
test_strcpy_flexarray(void)43 NOIPA void test_strcpy_flexarray (void)
44 {
45 T (S (0), fx); // { dg-bogus "\\\[-Warray-bounds" "pr92815" }
46 T (S (9), fx); // { dg-bogus "\\\[-Warray-bounds" "pr92815" }
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
test_strcpy_malloc_flexarray(void)71 NOIPA void test_strcpy_malloc_flexarray (void)
72 {
73 size_t r_0_1 = UR (0, 1);
74
75 T (char, S (0), r_0_1);
76 T (char, S (1), r_0_1); // { dg-warning "\\\[-Warray-bounds" }
77
78 size_t r_1_2 = UR (1, 2);
79
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
84 size_t r_2_3 = UR (2, 3);
85
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 }
91