llvm/libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.single/new.size.replace.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);

// Test that we can replace the operator by defining our own.

// UNSUPPORTED: sanitizer-new-delete

#include <new>
#include <cstddef>
#include <cstdlib>
#include <cassert>

#include "test_macros.h"

int new_called = 0;
int delete_called = 0;

void* operator new(std::size_t s) TEST_THROW_SPEC(std::bad_alloc) {
    ++new_called;
    void* ret = std::malloc(s);
    if (!ret) {
      std::abort(); // placate MSVC's unchecked malloc warning (assert() won't silence it)
    }
    return ret;
}

void operator delete(void* p) TEST_NOEXCEPT {
    ++delete_called;
    std::free(p);
}

int main(int, char**) {
    new_called = delete_called = 0;
    int* x = DoNotOptimize(new int(3));
    assert(x != nullptr);
    ASSERT_WITH_OPERATOR_NEW_FALLBACKS(new_called == 1);

    delete x;
    ASSERT_WITH_OPERATOR_NEW_FALLBACKS(delete_called == 1);

    return 0;
}