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/* Test -Wsizeof-pointer-memaccess warnings. */
/* { dg-do compile } */
/* { dg-options "-Wsizeof-pointer-memaccess -Wno-stringop-overflow -Wno-stringop-truncation -ftrack-macro-expansion=0" } */
#define bos(ptr) __builtin_object_size (ptr, 1)
#define bos0(ptr) __builtin_object_size (ptr, 0)
#define memset(dst, val, sz) \
(FUNC (memset, dst, val, sz, bos (dst)), sink ((dst)))
#define memcpy(dst, src, sz) \
(FUNC (memcpy, dst, src, sz, bos (dst)), sink ((dst)))
#define memmove(dst, src, sz) \
(FUNC (memmove, dst, src, sz, bos (dst)), sink ((dst)))
#define mempcpy(dst, src, sz) \
(FUNC (mempcpy, dst, src, sz, bos (dst)), sink ((dst)))
#define strncpy(dst, src, sz) \
(FUNC (strncpy, dst, src, sz, bos (dst)), sink (dst))
#define strncat(dst, src, sz) \
(FUNC (strncat, dst, src, sz, bos (dst)), sink (dst))
#define stpncpy(dst, src, sz) \
(FUNC (stpncpy, dst, src, sz, bos (dst)), sink (dst))
void sink (void*);
#define S10 "123456789"
extern char a10[10];
void test_string_literal (char *dst)
{
#define FUNC(f, d, s, n, x) __builtin_ ## f (d, s, n)
/* It's common to call memcpy and other raw memory functions with
size drerived from the source argument. Verify that no warning
is ussued for such calls. */
memcpy (dst, S10, sizeof S10);
mempcpy (dst, S10, sizeof S10);
memmove (dst, S10, sizeof S10);
memset (dst, 0, sizeof S10);
stpncpy (dst, S10, sizeof S10); /* { dg-warning "\\\[-Wsizeof-pointer-memaccess]" } */
strncpy (dst, S10, sizeof S10); /* { dg-warning "\\\[-Wsizeof-pointer-memaccess]" } */
strncat (dst, S10, sizeof S10); /* { dg-warning "\\\[-Wsizeof-pointer-memaccess]" } */
/* Unlike in the cases above, even though the calls below are likely
wrong, it's not easy to detect that the expression (sizeof X - 1)
involves sizeof of the source, so no warning is issued here, as
helpful as one might be. Whether -Wstringop-truncation is issued
is tested elsewhere. */
stpncpy (dst, S10, sizeof S10 - 1); /* { dg-warning "\\\[-Wsizeof-pointer-memaccess]" "" { xfail *-*-* } } */
strncpy (dst, S10, sizeof S10 - 1); /* { dg-warning "\\\[-Wsizeof-pointer-memaccess]" "" { xfail *-*-* } } */
strncat (dst, S10, sizeof S10 - 1); /* { dg-warning "\\\[-Wsizeof-pointer-memaccess]" "" { xfail *-*-* } } */
}
void test_char_array (char *dst)
{
memcpy (dst, a10, sizeof a10);
mempcpy (dst, a10, sizeof a10);
memmove (dst, a10, sizeof a10);
memset (dst, 0, sizeof a10);
stpncpy (dst, a10, sizeof a10); /* { dg-warning "\\\[-Wsizeof-pointer-memaccess]" } */
strncpy (dst, a10, sizeof a10); /* { dg-warning "\\\[-Wsizeof-pointer-memaccess]" } */
strncat (dst, a10, sizeof a10); /* { dg-warning "\\\[-Wsizeof-pointer-memaccess]" } */
stpncpy (dst, a10, sizeof a10 - 1); /* { dg-warning "\\\[-Wsizeof-pointer-memaccess]" "" { xfail *-*-* } } */
strncpy (dst, a10, sizeof a10 - 1); /* { dg-warning "\\\[-Wsizeof-pointer-memaccess]" "" { xfail *-*-* } } */
strncat (dst, a10, sizeof a10 - 1); /* { dg-warning "\\\[-Wsizeof-pointer-memaccess]" "" { xfail *-*-* } } */
}
#undef FUNC
#define FUNC(f, d, s, n, os) __builtin___ ## f ## _chk (d, s, n, os)
void test_char_array_chk (char *dst)
{
memcpy (dst, S10, sizeof S10);
mempcpy (dst, S10, sizeof S10);
memmove (dst, S10, sizeof S10);
memset (dst, 0, sizeof S10);
stpncpy (dst, S10, sizeof S10); /* { dg-warning "\\\[-Wsizeof-pointer-memaccess]" } */
strncpy (dst, S10, sizeof S10); /* { dg-warning "\\\[-Wsizeof-pointer-memaccess]" } */
strncat (dst, S10, sizeof S10); /* { dg-warning "\\\[-Wsizeof-pointer-memaccess]" } */
stpncpy (dst, S10, sizeof S10 - 1); /* { dg-warning "\\\[-Wsizeof-pointer-memaccess]" "" { xfail *-*-* } } */
strncpy (dst, S10, sizeof S10 - 1); /* { dg-warning "\\\[-Wsizeof-pointer-memaccess]" "" { xfail *-*-* } } */
strncat (dst, S10, sizeof S10 - 1); /* { dg-warning "\\\[-Wsizeof-pointer-memaccess]" "" { xfail *-*-* } } */
}
void test_string_literal_chk (char *dst)
{
memcpy (dst, a10, sizeof a10);
mempcpy (dst, a10, sizeof a10);
memmove (dst, a10, sizeof a10);
memset (dst, 0, sizeof a10);
stpncpy (dst, a10, sizeof a10); /* { dg-warning "\\\[-Wsizeof-pointer-memaccess]" } */
strncpy (dst, a10, sizeof a10); /* { dg-warning "\\\[-Wsizeof-pointer-memaccess]" } */
strncat (dst, a10, sizeof a10); /* { dg-warning "\\\[-Wsizeof-pointer-memaccess]" } */
stpncpy (dst, a10, sizeof a10 - 1); /* { dg-warning "\\\[-Wsizeof-pointer-memaccess]" "" { xfail *-*-* } } */
strncpy (dst, a10, sizeof a10 - 1); /* { dg-warning "\\\[-Wsizeof-pointer-memaccess]" "" { xfail *-*-* } } */
strncat (dst, a10, sizeof a10 - 1); /* { dg-warning "\\\[-Wsizeof-pointer-memaccess]" "" { xfail *-*-* } } */
}
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