| /* PR middle-end/91582 - missing heap overflow detection for strcpy |
| |
| The -Warray-bounds instances here probably should be replaced by |
| -Wstringop-overflow when it detects these overflows (see also |
| the xfails in Wstringop-overflow-25.c). |
| |
| { dg-do compile } |
| { dg-options "-O2 -Wall -Wno-stringop-overflow -ftrack-macro-expansion=0" } */ |
| |
| #include "range.h" |
| |
| #define INT_MAX __INT_MAX__ |
| #define INT_MIN (-INT_MAX - 1) |
| |
| #define ATTR(...) __attribute__ ((__VA_ARGS__)) |
| #define NOIPA ATTR (noipa) |
| |
| extern void* malloc (size_t); |
| extern char* strcpy (char*, const char*); |
| |
| void sink (void*); |
| |
| #define S36 "0123456789abcdefghijklmnopqrstuvwxyz" |
| #define S(N) (S36 + sizeof S36 - N - 1) |
| |
| struct Flex |
| { |
| char n, ax[]; |
| }; |
| |
| extern struct Flex fx; |
| struct Flex f1 = { 1, { 1 } }; |
| struct Flex f2 = { 2, { 1, 2 } }; |
| struct Flex f3 = { 3, { 1, 2, 3 } }; |
| |
| #define T(src, f) do { \ |
| char *s = src; \ |
| char *d = f.ax; \ |
| strcpy (d, s); \ |
| sink (&f); \ |
| } while (0) |
| |
| NOIPA void test_strcpy_flexarray (void) |
| { |
| T (S (0), fx); // { dg-bogus "\\\[-Warray-bounds" "pr92815" } |
| T (S (9), fx); // { dg-bogus "\\\[-Warray-bounds" "pr92815" } |
| |
| T (S (0), f1); |
| T (S (1), f1); // { dg-warning "\\\[-Warray-bounds" } |
| |
| T (S (0), f2); |
| T (S (1), f2); |
| T (S (2), f2); // { dg-warning "\\\[-Warray-bounds" } |
| |
| T (S (0), f3); |
| T (S (2), f3); |
| T (S (3), f3); // { dg-warning "\\\[-Warray-bounds" } |
| T (S (9), f3); // { dg-warning "\\\[-Warray-bounds" } |
| } |
| |
| #undef T |
| #define T(T, src, n) do { \ |
| char *s = src; \ |
| typedef struct { T n, ax[]; } Flex; \ |
| Flex *p = (Flex*)malloc (sizeof *p + n); \ |
| char *d = (char*)p->ax; \ |
| strcpy (d, s); \ |
| sink (p); \ |
| } while (0) |
| |
| NOIPA void test_strcpy_malloc_flexarray (void) |
| { |
| size_t r_0_1 = UR (0, 1); |
| |
| T (char, S (0), r_0_1); |
| T (char, S (1), r_0_1); // { dg-warning "\\\[-Warray-bounds" } |
| |
| size_t r_1_2 = UR (1, 2); |
| |
| T (char, S (0), r_1_2); |
| T (char, S (1), r_1_2); |
| T (char, S (2), r_1_2); // { dg-warning "\\\[-Warray-bounds" } |
| |
| size_t r_2_3 = UR (2, 3); |
| |
| T (char, S (0), r_2_3); |
| T (char, S (2), r_2_3); |
| T (char, S (3), r_2_3); // { dg-warning "\\\[-Warray-bounds" } |
| T (char, S (9), r_2_3); // { dg-warning "\\\[-Warray-bounds" } |
| } |