| // RUN: %clang_cc1 -fsyntax-only -Wdynamic-class-memaccess -verify %s |
| |
| extern "C" void *memset(void *, int, unsigned); |
| extern "C" void *memmove(void *s1, const void *s2, unsigned n); |
| extern "C" void *memcpy(void *s1, const void *s2, unsigned n); |
| extern "C" int memcmp(void *s1, const void *s2, unsigned n); |
| extern "C" int bcmp(void *s1, const void *s2, unsigned n); |
| |
| |
| // Redeclare without the extern "C" to test that we still figure out that this |
| // is the "real" memset. |
| void *memset(void *, int, unsigned); |
| |
| // Several types that should not warn. |
| struct S1 {} s1; |
| struct S2 { int x; } s2; |
| struct S3 { float x, y; S1 s[4]; void (*f)(S1**); } s3; |
| |
| class C1 { |
| int x, y, z; |
| public: |
| void foo() {} |
| } c1; |
| |
| struct X1 { virtual void f(); } x1, x1arr[2]; |
| struct X2 : virtual S1 {} x2; |
| |
| struct ContainsDynamic { X1 dynamic; } contains_dynamic; |
| struct DeepContainsDynamic { ContainsDynamic m; } deep_contains_dynamic; |
| struct ContainsArrayDynamic { X1 dynamic[1]; } contains_array_dynamic; |
| struct ContainsPointerDynamic { X1 *dynamic; } contains_pointer_dynamic; |
| |
| void test_warn() { |
| memset(&x1, 0, sizeof x1); // \ |
| // expected-warning {{destination for this 'memset' call is a pointer to dynamic class}} \ |
| // expected-note {{explicitly cast the pointer to silence this warning}} |
| memset(x1arr, 0, sizeof x1arr); // \ |
| // expected-warning {{destination for this 'memset' call is a pointer to dynamic class}} \ |
| // expected-note {{explicitly cast the pointer to silence this warning}} |
| memset((void*)x1arr, 0, sizeof x1arr); |
| memset(&x2, 0, sizeof x2); // \ |
| // expected-warning {{destination for this 'memset' call is a pointer to dynamic class}} \ |
| // expected-note {{explicitly cast the pointer to silence this warning}} |
| |
| memmove(&x1, 0, sizeof x1); // \ |
| // expected-warning{{destination for this 'memmove' call is a pointer to dynamic class 'X1'; vtable pointer will be overwritten}} \ |
| // expected-note {{explicitly cast the pointer to silence this warning}} |
| memmove(0, &x1, sizeof x1); // \ |
| // expected-warning{{source of this 'memmove' call is a pointer to dynamic class 'X1'; vtable pointer will be moved}} \ |
| // expected-note {{explicitly cast the pointer to silence this warning}} |
| memcpy(&x1, 0, sizeof x1); // \ |
| // expected-warning{{destination for this 'memcpy' call is a pointer to dynamic class 'X1'; vtable pointer will be overwritten}} \ |
| // expected-note {{explicitly cast the pointer to silence this warning}} |
| memcpy(0, &x1, sizeof x1); // \ |
| // expected-warning{{source of this 'memcpy' call is a pointer to dynamic class 'X1'; vtable pointer will be copied}} \ |
| // expected-note {{explicitly cast the pointer to silence this warning}} |
| memcmp(&x1, 0, sizeof x1); // \ |
| // expected-warning{{first operand of this 'memcmp' call is a pointer to dynamic class 'X1'; vtable pointer will be compared}} \ |
| // expected-note {{explicitly cast the pointer to silence this warning}} |
| memcmp(0, &x1, sizeof x1); // \ |
| // expected-warning{{second operand of this 'memcmp' call is a pointer to dynamic class 'X1'; vtable pointer will be compared}} \ |
| // expected-note {{explicitly cast the pointer to silence this warning}} |
| bcmp(&x1, 0, sizeof x1); // \ |
| // expected-warning{{first operand of this 'bcmp' call is a pointer to dynamic class 'X1'; vtable pointer will be compared}} \ |
| // expected-note {{explicitly cast the pointer to silence this warning}} |
| bcmp(0, &x1, sizeof x1); // \ |
| // expected-warning{{second operand of this 'bcmp' call is a pointer to dynamic class 'X1'; vtable pointer will be compared}} \ |
| // expected-note {{explicitly cast the pointer to silence this warning}} |
| |
| __builtin_memset(&x1, 0, sizeof x1); // \ |
| // expected-warning {{destination for this '__builtin_memset' call is a pointer to dynamic class}} \ |
| // expected-note {{explicitly cast the pointer to silence this warning}} |
| __builtin_memset(&x2, 0, sizeof x2); // \ |
| // expected-warning {{destination for this '__builtin_memset' call is a pointer to dynamic class}} \ |
| // expected-note {{explicitly cast the pointer to silence this warning}} |
| |
| __builtin_memmove(&x1, 0, sizeof x1); // \ |
| // expected-warning{{destination for this '__builtin_memmove' call is a pointer to dynamic class}} \ |
| // expected-note {{explicitly cast the pointer to silence this warning}} |
| __builtin_memmove(0, &x1, sizeof x1); // \ |
| // expected-warning{{source of this '__builtin_memmove' call is a pointer to dynamic class}} \ |
| // expected-note {{explicitly cast the pointer to silence this warning}} |
| __builtin_memcpy(&x1, 0, sizeof x1); // \ |
| // expected-warning{{destination for this '__builtin_memcpy' call is a pointer to dynamic class}} \ |
| // expected-note {{explicitly cast the pointer to silence this warning}} |
| __builtin_memcpy(0, &x1, sizeof x1); // \ |
| // expected-warning{{source of this '__builtin_memcpy' call is a pointer to dynamic class}} \ |
| // expected-note {{explicitly cast the pointer to silence this warning}} |
| |
| __builtin___memset_chk(&x1, 0, sizeof x1, sizeof x1); // \ |
| // expected-warning {{destination for this '__builtin___memset_chk' call is a pointer to dynamic class}} \ |
| // expected-note {{explicitly cast the pointer to silence this warning}} |
| __builtin___memset_chk(&x2, 0, sizeof x2, sizeof x2); // \ |
| // expected-warning {{destination for this '__builtin___memset_chk' call is a pointer to dynamic class}} \ |
| // expected-note {{explicitly cast the pointer to silence this warning}} |
| |
| __builtin___memmove_chk(&x1, 0, sizeof x1, sizeof x1); // \ |
| // expected-warning{{destination for this '__builtin___memmove_chk' call is a pointer to dynamic class}} \ |
| // expected-note {{explicitly cast the pointer to silence this warning}} |
| __builtin___memmove_chk(0, &x1, sizeof x1, sizeof x1); // \ |
| // expected-warning{{source of this '__builtin___memmove_chk' call is a pointer to dynamic class}} \ |
| // expected-note {{explicitly cast the pointer to silence this warning}} |
| __builtin___memcpy_chk(&x1, 0, sizeof x1, sizeof x1); // \ |
| // expected-warning{{destination for this '__builtin___memcpy_chk' call is a pointer to dynamic class}} \ |
| // expected-note {{explicitly cast the pointer to silence this warning}} |
| __builtin___memcpy_chk(0, &x1, sizeof x1, sizeof x1); // \ |
| // expected-warning{{source of this '__builtin___memcpy_chk' call is a pointer to dynamic class}} \ |
| // expected-note {{explicitly cast the pointer to silence this warning}} |
| |
| // expected-warning@+2 {{destination for this 'memset' call is a pointer to class containing a dynamic class 'X1'}} |
| // expected-note@+1 {{explicitly cast the pointer to silence this warning}} |
| memset(&contains_dynamic, 0, sizeof(contains_dynamic)); |
| // expected-warning@+2 {{destination for this 'memset' call is a pointer to class containing a dynamic class 'X1'}} |
| // expected-note@+1 {{explicitly cast the pointer to silence this warning}} |
| memset(&deep_contains_dynamic, 0, sizeof(deep_contains_dynamic)); |
| // expected-warning@+2 {{destination for this 'memset' call is a pointer to class containing a dynamic class 'X1'}} |
| // expected-note@+1 {{explicitly cast the pointer to silence this warning}} |
| memset(&contains_array_dynamic, 0, sizeof(contains_array_dynamic)); |
| } |
| |
| void test_nowarn(void *void_ptr) { |
| int i, *iptr; |
| float y; |
| char c; |
| |
| memset(&i, 0, sizeof i); |
| memset(&iptr, 0, sizeof iptr); |
| memset(&y, 0, sizeof y); |
| memset(&c, 0, sizeof c); |
| memset(void_ptr, 0, 42); |
| memset(&s1, 0, sizeof s1); |
| memset(&s2, 0, sizeof s2); |
| memset(&s3, 0, sizeof s3); |
| memset(&c1, 0, sizeof c1); |
| |
| memset(&contains_pointer_dynamic, 0, sizeof(contains_pointer_dynamic)); |
| |
| // Unevaluated code shouldn't warn. |
| (void)sizeof memset(&x1, 0, sizeof x1); |
| |
| // Dead code shouldn't warn. |
| if (false) memset(&x1, 0, sizeof x1); |
| } |
| |
| namespace N { |
| void *memset(void *, int, unsigned); |
| void test_nowarn() { |
| N::memset(&x1, 0, sizeof x1); |
| } |
| } |
| |
| namespace recursive_class { |
| struct S { |
| S v; |
| // expected-error@-1{{field has incomplete type 'recursive_class::S'}} |
| // expected-note@-3{{definition of 'recursive_class::S' is not complete until the closing '}'}} |
| } a; |
| |
| int main() { |
| __builtin_memset(&a, 0, sizeof a); |
| return 0; |
| } |
| } |