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56 lines
2.1 KiB
Java
56 lines
2.1 KiB
Java
/*
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* Copyright (c) 2025, Oracle and/or its affiliates. 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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* @test
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* @bug 8357105
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* @summary Test stacked string concatenations where the toString result
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* of the first StringBuilder chain is wired into an uncommon trap
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* located in the second one.
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* @run main/othervm compiler.stringopts.TestStackedConcatsAppendUncommonTrap
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* @run main/othervm -XX:-TieredCompilation -Xbatch
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* -XX:CompileOnly=compiler.stringopts.TestStackedConcatsAppendUncommonTrap::*
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* compiler.stringopts.TestStackedConcatsAppendUncommonTrap
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*/
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package compiler.stringopts;
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public class TestStackedConcatsAppendUncommonTrap {
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public static void main (String... args) {
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for (int i = 0; i < 10000; i++) {
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String s = f(" ");
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if (!s.equals(" ")) {
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throw new RuntimeException("wrong result.");
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}
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}
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}
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static String f(String c) {
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String s = " ";
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s = new StringBuilder().append(s).append(s).toString();
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s = new StringBuilder().append(s).append(s == c ? s : " ").toString();
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return s;
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}
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}
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