blob: 87d061a9d1a3c533623787169f8453bc5538bae3 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// void* operator new(std::size_t, std::align_val_t);
// Test that we can replace the operator by defining our own.
// UNSUPPORTED: c++03, c++11, c++14
// UNSUPPORTED: sanitizer-new-delete
// Libc++ when built for z/OS doesn't contain the aligned allocation functions,
// nor does the dynamic library shipped with z/OS.
// UNSUPPORTED: target={{.+}}-zos{{.*}}
#include <new>
#include <cstddef>
#include <cstdlib>
#include <cstdint>
#include <cassert>
#include <limits>
#include "test_macros.h"
#include "../types.h"
int new_called = 0;
int delete_called = 0;
alignas(OverAligned) char DummyData[alignof(OverAligned)];
void* operator new(std::size_t s, std::align_val_t a) {
assert(s <= sizeof(DummyData));
assert(static_cast<std::size_t>(a) == alignof(OverAligned));
++new_called;
return DummyData;
}
void operator delete(void*, std::align_val_t) noexcept {
++delete_called;
// nothing to delete, we didn't actually allocate in `operator new`
}
int main(int, char**) {
// Test with an overaligned type
{
new_called = delete_called = 0;
OverAligned* x = new OverAligned;
assert(static_cast<void*>(x) == DummyData);
assert(new_called == 1);
delete x;
assert(delete_called == 1);
}
// Test with a type that is right on the verge of being overaligned
{
new_called = delete_called = 0;
MaxAligned* x = new MaxAligned;
assert(x != nullptr);
assert(new_called == 0);
delete x;
assert(delete_called == 0);
}
// Test with a type that is clearly not overaligned
{
new_called = delete_called = 0;
int* x = new int;
assert(x != nullptr);
assert(new_called == 0);
delete x;
assert(delete_called == 0);
}
return 0;
}
|
