forked from OSchip/llvm-project
86 lines
3.2 KiB
C++
86 lines
3.2 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -Wnon-pod-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);
|
|
|
|
// Several POD 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;
|
|
|
|
// We use the C++11 concept of POD for this warning, so ensure a non-aggregate
|
|
// still warns.
|
|
class C1 {
|
|
int x, y, z;
|
|
public:
|
|
void foo() {}
|
|
} c1;
|
|
|
|
// Non-POD types that should warn.
|
|
struct X1 { X1(); } x1;
|
|
struct X2 { ~X2(); } x2;
|
|
struct X3 { virtual void f(); } x3;
|
|
struct X4 : X2 {} x4;
|
|
struct X5 : virtual S1 {} x5;
|
|
|
|
void test_warn() {
|
|
memset(&x1, 0, sizeof x1); // \
|
|
// expected-warning {{destination for this 'memset' call is a pointer to non-POD type}} \
|
|
// expected-note {{explicitly cast the pointer to silence this warning}}
|
|
memset(&x2, 0, sizeof x2); // \
|
|
// expected-warning {{destination for this 'memset' call is a pointer to non-POD type}} \
|
|
// expected-note {{explicitly cast the pointer to silence this warning}}
|
|
memset(&x3, 0, sizeof x3); // \
|
|
// expected-warning {{destination for this 'memset' call is a pointer to dynamic class}} \
|
|
// expected-note {{explicitly cast the pointer to silence this warning}}
|
|
memset(&x4, 0, sizeof x4); // \
|
|
// expected-warning {{destination for this 'memset' call is a pointer to non-POD type}} \
|
|
// expected-note {{explicitly cast the pointer to silence this warning}}
|
|
memset(&x5, 0, sizeof x5); // \
|
|
// 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 non-POD type 'struct X1'}} \
|
|
// 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 non-POD type 'struct X1'}} \
|
|
// 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 non-POD type 'struct X1'}} \
|
|
// 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 non-POD type 'struct X1'}} \
|
|
// expected-note {{explicitly cast the pointer to silence this warning}}
|
|
}
|
|
|
|
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);
|
|
|
|
// 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);
|
|
}
|
|
}
|