dc56a86b96
Incomplete types are not considered trivially copyable by clang but we don't want to warn about invalid argument for memcpy / memset in that case because we cannot prove they are not Trivially Copyable.
86 lines
2.6 KiB
C++
86 lines
2.6 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 -Wnontrivial-memaccess %s
|
|
|
|
extern "C" void *bzero(void *, unsigned);
|
|
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);
|
|
|
|
class TriviallyCopyable {};
|
|
class NonTriviallyCopyable { NonTriviallyCopyable(const NonTriviallyCopyable&);};
|
|
struct Incomplete;
|
|
|
|
void test_bzero(TriviallyCopyable* tc,
|
|
NonTriviallyCopyable *ntc,
|
|
Incomplete* i) {
|
|
// OK
|
|
bzero(tc, sizeof(*tc));
|
|
|
|
// OK
|
|
bzero(i, 10);
|
|
|
|
// expected-warning@+2{{first argument in call to 'bzero' is a pointer to non-trivially copyable type 'NonTriviallyCopyable'}}
|
|
// expected-note@+1{{explicitly cast the pointer to silence this warning}}
|
|
bzero(ntc, sizeof(*ntc));
|
|
|
|
// OK
|
|
bzero((void*)ntc, sizeof(*ntc));
|
|
}
|
|
|
|
void test_memset(TriviallyCopyable* tc,
|
|
NonTriviallyCopyable *ntc,
|
|
Incomplete* i) {
|
|
// OK
|
|
memset(tc, 0, sizeof(*tc));
|
|
|
|
// OK
|
|
memset(i, 0, 10);
|
|
|
|
// expected-warning@+2{{first argument in call to 'memset' is a pointer to non-trivially copyable type 'NonTriviallyCopyable'}}
|
|
// expected-note@+1{{explicitly cast the pointer to silence this warning}}
|
|
memset(ntc, 0, sizeof(*ntc));
|
|
|
|
// OK
|
|
memset((void*)ntc, 0, sizeof(*ntc));
|
|
}
|
|
|
|
|
|
void test_memcpy(TriviallyCopyable* tc0, TriviallyCopyable* tc1,
|
|
NonTriviallyCopyable *ntc0, NonTriviallyCopyable *ntc1,
|
|
Incomplete *i0, Incomplete *i1) {
|
|
// OK
|
|
memcpy(tc0, tc1, sizeof(*tc0));
|
|
|
|
// OK
|
|
memcpy(i0, i1, 10);
|
|
|
|
// expected-warning@+2{{first argument in call to 'memcpy' is a pointer to non-trivially copyable type 'NonTriviallyCopyable'}}
|
|
// expected-note@+1{{explicitly cast the pointer to silence this warning}}
|
|
memcpy(ntc0, ntc1, sizeof(*ntc0));
|
|
|
|
// ~ OK
|
|
memcpy((void*)ntc0, ntc1, sizeof(*ntc0));
|
|
|
|
// OK
|
|
memcpy((void*)ntc0, (void*)ntc1, sizeof(*ntc0));
|
|
}
|
|
|
|
void test_memmove(TriviallyCopyable* tc0, TriviallyCopyable* tc1,
|
|
NonTriviallyCopyable *ntc0, NonTriviallyCopyable *ntc1,
|
|
Incomplete *i0, Incomplete *i1) {
|
|
// OK
|
|
memmove(tc0, tc1, sizeof(*tc0));
|
|
|
|
// OK
|
|
memmove(i0, i1, 10);
|
|
|
|
// expected-warning@+2{{first argument in call to 'memmove' is a pointer to non-trivially copyable type 'NonTriviallyCopyable'}}
|
|
// expected-note@+1{{explicitly cast the pointer to silence this warning}}
|
|
memmove(ntc0, ntc1, sizeof(*ntc0));
|
|
|
|
// ~ OK
|
|
memmove((void*)ntc0, ntc1, sizeof(*ntc0));
|
|
|
|
// OK
|
|
memmove((void*)ntc0, (void*)ntc1, sizeof(*ntc0));
|
|
}
|