73 lines
1.8 KiB
C
73 lines
1.8 KiB
C
/* Verify that -Wstringop-overflow doesn't cause false positives for
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anti-ranges. Note that not all of the statements below result in
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the memset argument being represented as an anti-range.
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{ dg-do compile }
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{ dg-options "-O2 -Wstringop-overflow" } */
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#define SCHAR_MAX __SCHAR_MAX__
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#define UCHAR_MAX (SCHAR_MAX * 2 + 1)
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#define SHRT_MAX __SHRT_MAX__
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#define USHRT_MAX (SHRT_MAX * 2U + 1)
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#define INT_MAX __INT_MAX__
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#define UINT_MAX (INT_MAX * 2U + 1)
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#define LONG_MAX __LONG_MAX__
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#define ULONG_MAX (LONG_MAX * 2LU + 1)
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#define PTRDIFF_MAX __PTRDIFF_MAX__
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#define SIZE_MAX __SIZE_MAX__
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typedef __PTRDIFF_TYPE__ ptrdiff_t;
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typedef __SIZE_TYPE__ size_t;
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#define TEST_AR_1(T, prefix) \
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void test_ar_1_ ## prefix (void *d, T n) \
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{ \
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if (n == prefix ## _MAX - 1) \
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n = prefix ## _MAX - 2; \
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__builtin_memset (d, 0, n); \
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} typedef void dummy
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#define TEST_AR_2(T, prefix) \
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void test_ar_2_ ## prefix (void *d, T n) \
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{ \
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if (prefix ## _MAX - 2 <= n && n <= prefix ## _MAX - 1) \
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n = prefix ## _MAX - 3; \
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__builtin_memset (d, 0, n); \
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} typedef void dummy
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/* Verify antirange where MIN == MAX. */
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TEST_AR_1 (signed char, SCHAR);
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TEST_AR_1 (unsigned char, UCHAR);
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TEST_AR_1 (short, SHRT);
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TEST_AR_1 (unsigned short, USHRT);
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TEST_AR_1 (int, INT);
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TEST_AR_1 (unsigned, UINT);
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TEST_AR_1 (long, LONG);
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TEST_AR_1 (unsigned long, ULONG);
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TEST_AR_1 (ptrdiff_t, PTRDIFF);
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TEST_AR_1 (size_t, SIZE);
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/* Verify antirange where MIN < MAX. */
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TEST_AR_2 (signed char, SCHAR);
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TEST_AR_2 (unsigned char, UCHAR);
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TEST_AR_2 (short, SHRT);
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TEST_AR_2 (unsigned short, USHRT);
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TEST_AR_2 (int, INT);
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TEST_AR_2 (unsigned, UINT);
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TEST_AR_2 (long, LONG);
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TEST_AR_2 (unsigned long, ULONG);
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TEST_AR_2 (ptrdiff_t, PTRDIFF);
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TEST_AR_2 (size_t, SIZE);
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