70 lines
2.6 KiB
C++
70 lines
2.6 KiB
C++
/*
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* Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2019 SAP SE. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "precompiled.hpp"
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#include "memory/resourceArea.hpp"
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#include "runtime/os.hpp"
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#include "utilities/globalDefinitions.hpp"
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#include "utilities/ostream.hpp"
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#include "unittest.hpp"
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static size_t print_lorem(outputStream* st, bool short_len) {
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// Create a ResourceMark just to make sure the stream does not use ResourceArea
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ResourceMark rm;
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static const char* const lorem = "Lorem ipsum dolor sit amet, consectetur adipiscing elit, "
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"sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Lacinia at quis "
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"risus sed vulputate odio ut enim blandit. Amet risus nullam eget felis eget. Viverra "
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"orci sagittis eu volutpat odio facilisis mauris sit. Erat velit scelerisque in dictum non.";
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static const size_t len_lorem = strlen(lorem);
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size_t len;
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if (short_len) {
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len = os::random() % 10;
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} else {
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len = MAX2(1, (int)(os::random() % len_lorem));
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}
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st->write(lorem, len);
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return len;
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}
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static void do_test_stringStream_dynamic_realloc(bool short_len) {
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stringStream ss(2); // small buffer to force lots of reallocations.
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size_t written = 0;
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for (int i = 0; i < 1000; i ++) {
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written += print_lorem(&ss, short_len);
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ASSERT_EQ(ss.size(), written);
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// Internal buffer should always be zero-terminated.
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ASSERT_EQ(ss.base()[ss.size()], '\0');
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}
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}
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TEST_VM(ostream, stringStream_dynamic_realloc_1) {
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do_test_stringStream_dynamic_realloc(false);
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}
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TEST_VM(ostream, stringStream_dynamic_realloc_2) {
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do_test_stringStream_dynamic_realloc(true);
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}
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