1//===----------------------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9// void* operator new[](std::size_t, std::nothrow_t const&);
10
11// Test that we can replace the operator by replacing `operator new[](std::size_t)` (the throwing version).
12
13// This doesn't work when the shared library was built with exceptions disabled, because
14// we can't implement the non-throwing new from the throwing new in that case.
15// XFAIL: no-exceptions
16
17// UNSUPPORTED: sanitizer-new-delete
18// XFAIL: libcpp-no-vcruntime
19// XFAIL: LIBCXX-AIX-FIXME
20
21// MSVC/vcruntime falls back from the nothrow array new to the nothrow
22// scalar new, instead of falling back on the throwing array new.
23// https://developercommunity.visualstudio.com/t/vcruntime-nothrow-array-operator-new-fal/10373274
24// XFAIL: target={{.+}}-windows-msvc
25
26#include <new>
27#include <cstddef>
28#include <cstdlib>
29#include <cassert>
30
31#include "test_macros.h"
32
33int new_called = 0;
34int delete_called = 0;
35
36TEST_WORKAROUND_BUG_109234844_WEAK
37void* operator new[](std::size_t s) TEST_THROW_SPEC(std::bad_alloc) {
38 ++new_called;
39 void* ret = std::malloc(s);
40 if (!ret) {
41 std::abort(); // placate MSVC's unchecked malloc warning (assert() won't silence it)
42 }
43 return ret;
44}
45
46void operator delete(void* p) TEST_NOEXCEPT {
47 ++delete_called;
48 std::free(p);
49}
50
51int main(int, char**) {
52 new_called = delete_called = 0;
53 int* x = DoNotOptimize(new (std::nothrow) int[3]);
54 assert(x != nullptr);
55 ASSERT_WITH_OPERATOR_NEW_FALLBACKS(new_called == 1);
56
57 delete[] x;
58 ASSERT_WITH_OPERATOR_NEW_FALLBACKS(delete_called == 1);
59
60 return 0;
61}
62

source code of libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.array/new.size_nothrow.replace.indirect.pass.cpp