122 lines
6.1 KiB
C++
122 lines
6.1 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -Wdynamic-class-memaccess -verify %s
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extern "C" void *memset(void *, int, unsigned);
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extern "C" void *memmove(void *s1, const void *s2, unsigned n);
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extern "C" void *memcpy(void *s1, const void *s2, unsigned n);
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extern "C" void *memcmp(void *s1, const void *s2, unsigned n);
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// Redeclare without the extern "C" to test that we still figure out that this
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// is the "real" memset.
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void *memset(void *, int, unsigned);
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// Several types that should not warn.
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struct S1 {} s1;
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struct S2 { int x; } s2;
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struct S3 { float x, y; S1 s[4]; void (*f)(S1**); } s3;
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class C1 {
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int x, y, z;
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public:
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void foo() {}
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} c1;
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struct X1 { virtual void f(); } x1;
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struct X2 : virtual S1 {} x2;
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void test_warn() {
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memset(&x1, 0, sizeof x1); // \
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// expected-warning {{destination for this 'memset' call is a pointer to dynamic class}} \
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// expected-note {{explicitly cast the pointer to silence this warning}}
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memset(&x2, 0, sizeof x2); // \
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// expected-warning {{destination for this 'memset' call is a pointer to dynamic class}} \
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// expected-note {{explicitly cast the pointer to silence this warning}}
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memmove(&x1, 0, sizeof x1); // \
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// expected-warning{{destination for this 'memmove' call is a pointer to dynamic class 'struct X1'; vtable pointer will be overwritten}} \
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// expected-note {{explicitly cast the pointer to silence this warning}}
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memmove(0, &x1, sizeof x1); // \
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// expected-warning{{source of this 'memmove' call is a pointer to dynamic class 'struct X1'; vtable pointer will be moved}} \
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// expected-note {{explicitly cast the pointer to silence this warning}}
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memcpy(&x1, 0, sizeof x1); // \
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// expected-warning{{destination for this 'memcpy' call is a pointer to dynamic class 'struct X1'; vtable pointer will be overwritten}} \
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// expected-note {{explicitly cast the pointer to silence this warning}}
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memcpy(0, &x1, sizeof x1); // \
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// expected-warning{{source of this 'memcpy' call is a pointer to dynamic class 'struct X1'; vtable pointer will be copied}} \
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// expected-note {{explicitly cast the pointer to silence this warning}}
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memcmp(&x1, 0, sizeof x1); // \
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// expected-warning{{first operand of this 'memcmp' call is a pointer to dynamic class 'struct X1'; vtable pointer will be compared}} \
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// expected-note {{explicitly cast the pointer to silence this warning}}
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memcmp(0, &x1, sizeof x1); // \
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// expected-warning{{second operand of this 'memcmp' call is a pointer to dynamic class 'struct X1'; vtable pointer will be compared}} \
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// expected-note {{explicitly cast the pointer to silence this warning}}
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__builtin_memset(&x1, 0, sizeof x1); // \
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// expected-warning {{destination for this '__builtin_memset' call is a pointer to dynamic class}} \
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// expected-note {{explicitly cast the pointer to silence this warning}}
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__builtin_memset(&x2, 0, sizeof x2); // \
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// expected-warning {{destination for this '__builtin_memset' call is a pointer to dynamic class}} \
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// expected-note {{explicitly cast the pointer to silence this warning}}
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__builtin_memmove(&x1, 0, sizeof x1); // \
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// expected-warning{{destination for this '__builtin_memmove' call is a pointer to dynamic class}} \
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// expected-note {{explicitly cast the pointer to silence this warning}}
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__builtin_memmove(0, &x1, sizeof x1); // \
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// expected-warning{{source of this '__builtin_memmove' call is a pointer to dynamic class}} \
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// expected-note {{explicitly cast the pointer to silence this warning}}
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__builtin_memcpy(&x1, 0, sizeof x1); // \
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// expected-warning{{destination for this '__builtin_memcpy' call is a pointer to dynamic class}} \
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// expected-note {{explicitly cast the pointer to silence this warning}}
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__builtin_memcpy(0, &x1, sizeof x1); // \
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// expected-warning{{source of this '__builtin_memcpy' call is a pointer to dynamic class}} \
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// expected-note {{explicitly cast the pointer to silence this warning}}
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__builtin___memset_chk(&x1, 0, sizeof x1, sizeof x1); // \
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// expected-warning {{destination for this '__builtin___memset_chk' call is a pointer to dynamic class}} \
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// expected-note {{explicitly cast the pointer to silence this warning}}
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__builtin___memset_chk(&x2, 0, sizeof x2, sizeof x2); // \
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// expected-warning {{destination for this '__builtin___memset_chk' call is a pointer to dynamic class}} \
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// expected-note {{explicitly cast the pointer to silence this warning}}
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__builtin___memmove_chk(&x1, 0, sizeof x1, sizeof x1); // \
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// expected-warning{{destination for this '__builtin___memmove_chk' call is a pointer to dynamic class}} \
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// expected-note {{explicitly cast the pointer to silence this warning}}
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__builtin___memmove_chk(0, &x1, sizeof x1, sizeof x1); // \
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// expected-warning{{source of this '__builtin___memmove_chk' call is a pointer to dynamic class}} \
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// expected-note {{explicitly cast the pointer to silence this warning}}
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__builtin___memcpy_chk(&x1, 0, sizeof x1, sizeof x1); // \
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// expected-warning{{destination for this '__builtin___memcpy_chk' call is a pointer to dynamic class}} \
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// expected-note {{explicitly cast the pointer to silence this warning}}
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__builtin___memcpy_chk(0, &x1, sizeof x1, sizeof x1); // \
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// expected-warning{{source of this '__builtin___memcpy_chk' call is a pointer to dynamic class}} \
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// expected-note {{explicitly cast the pointer to silence this warning}}
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}
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void test_nowarn(void *void_ptr) {
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int i, *iptr;
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float y;
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char c;
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memset(&i, 0, sizeof i);
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memset(&iptr, 0, sizeof iptr);
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memset(&y, 0, sizeof y);
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memset(&c, 0, sizeof c);
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memset(void_ptr, 0, 42);
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memset(&s1, 0, sizeof s1);
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memset(&s2, 0, sizeof s2);
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memset(&s3, 0, sizeof s3);
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memset(&c1, 0, sizeof c1);
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// Unevaluated code shouldn't warn.
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(void)sizeof memset(&x1, 0, sizeof x1);
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// Dead code shouldn't warn.
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if (false) memset(&x1, 0, sizeof x1);
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}
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namespace N {
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void *memset(void *, int, unsigned);
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void test_nowarn() {
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N::memset(&x1, 0, sizeof x1);
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}
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}
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