llvm/libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.array/new.size_nothrow.pass.cpp

//===----------------------------------------------------------------------===//
//
// 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::nothrow_t const&);

// asan and msan will not call the new handler.
// UNSUPPORTED: sanitizer-new-delete

#include <new>
#include <cstddef>
#include <cassert>
#include <limits>

#include "test_macros.h"
#include "../types.h"

int new_handler_called = 0;

void my_new_handler() {
    ++new_handler_called;
    std::set_new_handler(nullptr);
}

int main(int, char**) {
    // Test that we can call the function directly
    {
        void* x = operator new[](10, std::nothrow);
        assert(x != nullptr);
        operator delete[](x, std::nothrow);
    }

    // Test that the new handler is called and we return nullptr if allocation fails
    {
        std::set_new_handler(my_new_handler);
        void* x = operator new[](std::numeric_limits<std::size_t>::max(), std::nothrow);
        assert(new_handler_called == 1);
        assert(x == nullptr);
    }

    // Test that a new expression constructs the right objects
    // and a delete expression deletes them. The brace-init requires C++11.
    {
#if TEST_STD_VER >= 11
        LifetimeInformation infos[3];
        TrackLifetime* x = new (std::nothrow) TrackLifetime[3]{infos[0], infos[1], infos[2]};
        assert(x != nullptr);

        void* addresses[3] = {&x[0], &x[1], &x[2]};
        assert(infos[0].address_constructed == addresses[0]);
        assert(infos[1].address_constructed == addresses[1]);
        assert(infos[2].address_constructed == addresses[2]);

        delete[] x;
        assert(infos[0].address_destroyed == addresses[0]);
        assert(infos[1].address_destroyed == addresses[1]);
        assert(infos[2].address_destroyed == addresses[2]);
#endif
    }

    return 0;
}