author | redestad |
Tue, 02 Apr 2019 11:37:11 +0200 | |
changeset 54379 | 40a7e2fc9beb |
parent 48138 | 78b2ecdd3c4b |
permissions | -rw-r--r-- |
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/* |
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40a7e2fc9beb
8221724: Enable archiving of Strings with hash 0
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* Copyright (c) 2015, 2019, 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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// A test class to be launched in AppCDS mode, has basic+ |
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// coverage of string operations |
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import sun.hotspot.WhiteBox; |
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public class HelloStringPlus { |
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public static void main(String args[]) { |
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// Let's reference the string that is in archive |
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String testString1 = "shared_test_string_unique_14325"; |
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System.out.println("Hello String: " + testString1); |
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WhiteBox wb = WhiteBox.getWhiteBox(); |
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if (!wb.isShared(testString1) && !wb.areSharedStringsIgnored()) { |
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throw new RuntimeException("testString1 is not shared"); |
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} |
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// Check other basic string operations |
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// Interning and equality |
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String[] testArray = new String[] {"shared_", "test_", "string_", "intern_", "12345"}; |
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String toBeInterned = ""; |
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StringBuilder sb = new StringBuilder(); |
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for (String s : testArray) { |
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sb.append(s); |
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} |
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toBeInterned = sb.toString(); |
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System.out.println("About to intern a string: " + toBeInterned); |
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toBeInterned.intern(); |
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// check equality |
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if (testString1.equals(toBeInterned)) |
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throw new RuntimeException("Equality test 1 failed"); |
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if (!testString1.equals("shared_test_string" + '_' + "unique_14325")) |
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throw new RuntimeException("Equality test 2 failed"); |
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// Chech the hash code functionality; no special assertions, just make sure |
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// no crashe or exception occurs |
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System.out.println("testString1.hashCode() = " + testString1.hashCode()); |
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// Check intern() method for "" string |
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String empty = ""; |
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String empty_interned = empty.intern(); |
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54379
40a7e2fc9beb
8221724: Enable archiving of Strings with hash 0
redestad
parents:
48138
diff
changeset
|
69 |
if (!wb.isShared(empty)) { |
40a7e2fc9beb
8221724: Enable archiving of Strings with hash 0
redestad
parents:
48138
diff
changeset
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throw new RuntimeException("Empty string should be shared"); |
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} |
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if (empty_interned != empty) { |
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throw new RuntimeException("Different string is returned from intern() for empty string"); |
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} |
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} |
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} |