62 lines
3.6 KiB
C
62 lines
3.6 KiB
C
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// RUN: %clang_cc1 -Wmemset-transposed-args -verify %s
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// RUN: %clang_cc1 -xc++ -Wmemset-transposed-args -verify %s
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#define memset(...) __builtin_memset(__VA_ARGS__)
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#define bzero(x,y) __builtin_memset(x, 0, y)
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#define real_bzero(x,y) __builtin_bzero(x,y)
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int array[10];
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int *ptr;
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int main() {
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memset(array, sizeof(array), 0); // expected-warning{{'size' argument to memset is '0'; did you mean to transpose the last two arguments?}} expected-note{{parenthesize the third argument to silence}}
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memset(array, sizeof(array), 0xff); // expected-warning{{setting buffer to a 'sizeof' expression; did you mean to transpose the last two arguments?}} expected-note{{cast the second argument to 'int' to silence}} expected-warning{{'memset' will always overflow; destination buffer has size 40, but size argument is 255}}
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memset(ptr, sizeof(ptr), 0); // expected-warning{{'size' argument to memset is '0'; did you mean to transpose the last two arguments?}} expected-note{{parenthesize the third argument to silence}}
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memset(ptr, sizeof(*ptr) * 10, 1); // expected-warning{{setting buffer to a 'sizeof' expression; did you mean to transpose the last two arguments?}} expected-note{{cast the second argument to 'int' to silence}}
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memset(ptr, 10 * sizeof(int *), 1); // expected-warning{{setting buffer to a 'sizeof' expression; did you mean to transpose the last two arguments?}} expected-note{{cast the second argument to 'int' to silence}}
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memset(ptr, 10 * sizeof(int *) + 10, 0xff); // expected-warning{{setting buffer to a 'sizeof' expression; did you mean to transpose the last two arguments?}} expected-note{{cast the second argument to 'int' to silence}}
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memset(ptr, sizeof(char) * sizeof(int *), 0xff); // expected-warning{{setting buffer to a 'sizeof' expression; did you mean to transpose the last two arguments?}} expected-note{{cast the second argument to 'int' to silence}}
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memset(array, sizeof(array), sizeof(array)); // Uh... fine I guess.
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memset(array, 0, sizeof(array));
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memset(ptr, 0, sizeof(int *) * 10);
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memset(array, (int)sizeof(array), (0)); // no warning
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memset(array, (int)sizeof(array), 32); // no warning
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memset(array, 32, (0)); // no warning
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memset(array, 0, 0); // no warning
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bzero(ptr, 0); // expected-warning{{'size' argument to bzero is '0'}} expected-note{{parenthesize the second argument to silence}}
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real_bzero(ptr, 0); // expected-warning{{'size' argument to bzero is '0'}} expected-note{{parenthesize the second argument to silence}}
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}
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void macros() {
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#define ZERO 0
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int array[10];
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memset(array, 0xff, ZERO); // no warning
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// Still emit a diagnostic for memsetting a sizeof expression:
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memset(array, sizeof(array), ZERO); // expected-warning{{'sizeof'}} expected-note{{cast}}
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bzero(array, ZERO); // no warning
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real_bzero(array, ZERO); // no warning
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#define NESTED_DONT_DIAG \
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memset(array, 0xff, ZERO); \
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real_bzero(array, ZERO);
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NESTED_DONT_DIAG;
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#define NESTED_DO_DIAG \
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memset(array, 0xff, 0); \
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real_bzero(array, 0)
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NESTED_DO_DIAG; // expected-warning{{'size' argument to memset}} expected-warning{{'size' argument to bzero}} expected-note2{{parenthesize}}
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#define FN_MACRO(p) \
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memset(array, 0xff, p)
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FN_MACRO(ZERO);
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FN_MACRO(0); // FIXME: should we diagnose this?
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__builtin_memset(array, 0, ZERO); // no warning
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__builtin_bzero(array, ZERO);
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__builtin_memset(array, 1, 0); // expected-warning{{'size' argument to memset}} // expected-note{{parenthesize}}
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__builtin_bzero(array, 0); // expected-warning{{'size' argument to bzero}} // expected-note{{parenthesize}}
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}
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