164 lines
8.3 KiB
C++
164 lines
8.3 KiB
C++
|
// 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;
|
||
|
|
}
|
||
|
|
}
|