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// <streambuf>
10
11// UNSUPPORTED: c++03
12
13// template <class charT, class traits = char_traits<charT> >
14// class basic_streambuf;
15
16// void pbump(int n);
17//
18// REQUIRES: long_tests
19
20// Unsupported for no-exceptions builds because they have no way to report an
21// allocation failure when attempting to allocate the 2GiB string.
22// UNSUPPORTED: no-exceptions
23
24// Android devices frequently don't have enough memory to run this test. Rather
25// than throw std::bad_alloc, exhausting memory triggers the OOM Killer.
26// UNSUPPORTED: LIBCXX-ANDROID-FIXME
27
28#include <sstream>
29#include <cassert>
30#include "test_macros.h"
31
32struct SB : std::stringbuf
33{
34 SB() : std::stringbuf(std::ios::ate|std::ios::out) { }
35 const char* pubpbase() const { return pbase(); }
36 const char* pubpptr() const { return pptr(); }
37};
38
39int main(int, char**)
40{
41 try {
42 std::string str(2147483648, 'a');
43 SB sb;
44 sb.str(s: str);
45 assert(sb.pubpbase() <= sb.pubpptr());
46 }
47 catch (const std::length_error &) {} // maybe the string can't take 2GB
48 catch (const std::bad_alloc &) {} // maybe we don't have enough RAM
49
50 return 0;
51}
52

source code of libcxx/test/std/input.output/stream.buffers/streambuf/streambuf.protected/streambuf.put.area/pbump2gig.pass.cpp