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/* 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" }
}
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