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//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// <string>
// This test validates that ASan annotations are correctly updated after swaps.
// This test meticulously interchanges objects that store data both within their internal memory (Short
// String Optimization) and in external buffers (non-SSO).
#include <string>
#include <cassert>
#include "test_macros.h"
#include "asan_testing.h"
template <class CharT>
void test(const CharT val) {
using S = std::basic_string<CharT>;
S empty_s;
S short_s(3, val);
S long_s(1100, val);
std::swap(empty_s, empty_s);
std::swap(short_s, short_s);
std::swap(long_s, long_s);
LIBCPP_ASSERT(is_string_asan_correct(empty_s));
LIBCPP_ASSERT(is_string_asan_correct(short_s));
LIBCPP_ASSERT(is_string_asan_correct(long_s));
std::swap(empty_s, short_s);
LIBCPP_ASSERT(is_string_asan_correct(empty_s));
LIBCPP_ASSERT(is_string_asan_correct(short_s));
std::swap(empty_s, short_s);
LIBCPP_ASSERT(is_string_asan_correct(empty_s));
LIBCPP_ASSERT(is_string_asan_correct(short_s));
std::swap(empty_s, long_s);
LIBCPP_ASSERT(is_string_asan_correct(empty_s));
LIBCPP_ASSERT(is_string_asan_correct(long_s));
std::swap(empty_s, long_s);
LIBCPP_ASSERT(is_string_asan_correct(empty_s));
LIBCPP_ASSERT(is_string_asan_correct(long_s));
std::swap(short_s, long_s);
LIBCPP_ASSERT(is_string_asan_correct(short_s));
LIBCPP_ASSERT(is_string_asan_correct(long_s));
std::swap(short_s, long_s);
LIBCPP_ASSERT(is_string_asan_correct(short_s));
LIBCPP_ASSERT(is_string_asan_correct(long_s));
S long_s2(11100, val);
std::swap(long_s, long_s2);
LIBCPP_ASSERT(is_string_asan_correct(long_s));
LIBCPP_ASSERT(is_string_asan_correct(long_s2));
std::swap(long_s, long_s2);
LIBCPP_ASSERT(is_string_asan_correct(long_s));
LIBCPP_ASSERT(is_string_asan_correct(long_s2));
S long_s3(111, val);
std::swap(long_s, long_s3);
LIBCPP_ASSERT(is_string_asan_correct(long_s));
LIBCPP_ASSERT(is_string_asan_correct(long_s2));
}
int main(int, char**) {
test<char>('x');
#ifndef TEST_HAS_NO_WIDE_CHARACTERS
test<wchar_t>(L'x');
#endif
#if TEST_STD_VER >= 11
test<char16_t>(u'x');
test<char32_t>(U'x');
#endif
#if TEST_STD_VER >= 20
test<char8_t>(u8'x');
#endif
return 0;
}
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