52 lines
2.6 KiB
C++
52 lines
2.6 KiB
C++
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// RUN: %clang_cc1 -std=c++20 -Wunsafe-buffer-usage -fsafe-buffer-usage-suggestions -verify %s
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void lhs_span_multi_assign() {
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int *a = new int[2];
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int *b = a;
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int *c = b;
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int *d = c; // expected-warning{{'d' is an unsafe pointer used for buffer access}} expected-note{{change type of 'd' to 'std::span' to preserve bounds information, and change 'c', 'b', and 'a' to 'std::span' to propagate bounds information between them}}
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int tmp = d[2]; // expected-note{{used in buffer access here}}
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}
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void rhs_span1() {
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int *q = new int[12];
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int *p = q; // expected-warning{{'p' is an unsafe pointer used for buffer access}} expected-note{{change type of 'p' to 'std::span' to preserve bounds information, and change 'q' and 'r' to 'std::span' to propagate bounds information between them}}
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p[5] = 10; // expected-note{{used in buffer access here}}
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int *r = q; // expected-warning{{'r' is an unsafe pointer used for buffer access}} expected-note{{change type of 'r' to 'std::span' to preserve bounds information, and change 'p' and 'q' to 'std::span' to propagate bounds information between them}}
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r[10] = 5; // expected-note{{used in buffer access here}}
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}
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void rhs_span2() {
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int *q = new int[6];
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int *p = q; // expected-warning{{'p' is an unsafe pointer used for buffer access}} expected-note{{change type of 'p' to 'std::span' to preserve bounds information, and change 'q' to 'std::span' to propagate bounds information between them}}
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p[5] = 10; // expected-note{{used in buffer access here}}
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}
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// FIXME: Suggest fixits for p, q, and r since span a valid fixit for r.
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void rhs_span3() {
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int *q = new int[6];
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int *p = q; // expected-warning{{'p' is an unsafe pointer used for buffer access}}
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p[5] = 10; // expected-note{{used in buffer access here}}
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int *r = q; // FIXME: we do not fix `int *r = q` here as the `.data()` fix-it is not generally correct
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}
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void test_grouping() {
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int *z = new int[8];
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int tmp;
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int *y = new int[10]; // expected-warning{{'y' is an unsafe pointer used for buffer access}}
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tmp = y[5]; // expected-note{{used in buffer access here}}
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int *x = new int[10];
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x = y; // FIXME: we do not fix `x = y` here as the `.data()` fix-it is not generally correct
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int *w = z;
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}
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void test_crash() {
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int *r = new int[8];
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int *q = r;
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int *p; // expected-warning{{'p' is an unsafe pointer used for buffer access}} expected-note{{change type of 'p' to 'std::span' to preserve bounds information, and change 'q' and 'r' to 'std::span' to propagate bounds information between them}}
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p = q;
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int tmp = p[9]; // expected-note{{used in buffer access here}}
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}
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