122064a630
Specifically, the test std/input.output/string.streams/stringstream/stringstream.members/gcount.pass.cpp allocates a std::string with INT_MAX-1 elements, and then writes this to a std::stringstream. On Linux, running this test consumes around 5.0 GB of memory; on Windows, it ends up using up to 6.8 GB of memory. This limits whether such tests can run on e.g. GitHub Actions runners, where the free runners are limited to 8 GB of memory. This is somewhat similar to, but still notably different, from the existing test parameter long_tests.
38 lines
1.0 KiB
C++
38 lines
1.0 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: 32-bit-pointer
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// REQUIRES: large_tests
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// Test that tellp() does not break the stringstream after INT_MAX, due to use
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// of pbump() that accept int.
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#include <cassert>
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#include <climits>
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#include <sstream>
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#include <string>
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int main(int, char**) {
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std::stringstream ss;
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std::string payload(INT_MAX - 1, '\0');
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ss.write(payload.data(), payload.size());
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assert(ss.tellp() == INT_MAX - 1);
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ss.write("a", 1);
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assert(ss.tellp() == INT_MAX);
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ss.write("b", 1);
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assert(ss.tellp() == INT_MAX + 1ULL);
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// it fails only after previous tellp() corrupts the internal field with int
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// overflow
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assert(ss.tellp() == INT_MAX + 1ULL);
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return 0;
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}
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