Azat Khuzhin d4d96c4444 [libcxx][tests] Introduce 32-bit feature and use it for stringstream gcount test
This will avoid hardcoding all unsupported targets, since even after one
more follow up fix [1], there is one more failure.

  [1]: https://reviews.llvm.org/D150886

Plus, if you want to run it locally on some target that CI does not
covers, it could also false-positively fail, which is not good.

Reviewed By: #libc, ldionne

Differential Revision: https://reviews.llvm.org/D151046
2023-05-23 19:29:15 +02:00

37 lines
1.0 KiB
C++

//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: 32-bit-pointer
// Test that tellp() does not break the stringstream after INT_MAX, due to use
// of pbump() that accept int.
#include <cassert>
#include <climits>
#include <sstream>
#include <string>
int main(int, char**) {
std::stringstream ss;
std::string payload(INT_MAX - 1, '\0');
ss.write(payload.data(), payload.size());
assert(ss.tellp() == INT_MAX - 1);
ss.write("a", 1);
assert(ss.tellp() == INT_MAX);
ss.write("b", 1);
assert(ss.tellp() == INT_MAX + 1ULL);
// it fails only after previous tellp() corrupts the internal field with int
// overflow
assert(ss.tellp() == INT_MAX + 1ULL);
return 0;
}