--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/compiler/intrinsics/string/TestStringIntrinsics.java Tue Nov 03 09:41:03 2015 +0100
@@ -0,0 +1,435 @@
+/*
+ * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+import java.lang.annotation.*;
+import java.lang.reflect.*;
+import java.util.Arrays;
+
+/*
+ * @test
+ * @bug 8054307
+ * @summary Tests correctness of string related intrinsics and C2 optimizations.
+ * @run main/timeout=240 TestStringIntrinsics
+ */
+public class TestStringIntrinsics {
+
+ public enum Operation {
+ ARR_EQUALS_B, ARR_EQUALS_C, EQUALS, COMPARE_TO, INDEX_OF, INDEX_OF_CON_U, INDEX_OF_CON_L,
+ INDEX_OF_CON_UL, CONCAT, CONCAT_C, CONCAT_I, CONCAT_M, INDEX_OF_CHAR
+ }
+
+ @Retention(RetentionPolicy.RUNTIME)
+ @Target(ElementType.METHOD)
+ @interface Test {
+ Operation op();
+ String constString() default "";
+ String[] inStrings() default {};
+ char[] inChars() default {};
+ int[] inInts() default {};
+ String[] outStrings() default {};
+ }
+
+ public static void main(String[] args) throws Exception {
+ new TestStringIntrinsics().run();
+ }
+
+ public void run() throws Exception {
+ // Build latin1 and UTF16 strings
+ StringBuilder latin1Builder = new StringBuilder();
+ for (int i = 0; i <= 255; ++i) {
+ latin1Builder.append((char) i);
+ }
+ String latin1 = latin1Builder.toString();
+ StringBuilder utf16Builder = new StringBuilder();
+ for (int i = 0; i <= 10000; ++i) {
+ utf16Builder.append((char) i);
+ }
+ String utf16 = utf16Builder.toString();
+
+ // Invoke test methods
+ for (Method m : TestStringIntrinsics.class.getMethods()) {
+ if (m.isAnnotationPresent(Test.class)) {
+ System.out.print("Checking " + m.getName() + "... ");
+ Operation op = m.getAnnotation(Test.class).op();
+ Test antn = m.getAnnotation(Test.class);
+ if (isStringConcatTest(op)) {
+ checkStringConcat(op, m, antn);
+ } else {
+ checkIntrinsics(op, m, latin1, utf16, antn);
+ }
+ System.out.println("Done.");
+ }
+ }
+ }
+
+ private boolean isStringConcatTest(Operation op) {
+ return op == Operation.CONCAT ||
+ op == Operation.CONCAT_C ||
+ op == Operation.CONCAT_I ||
+ op == Operation.CONCAT_M;
+ }
+
+ /**
+ * Checks correctness of the String.equals, String.compareTo and String.indexOf intrinsics.
+ * -XX:SpecialStringEquals
+ * -XX:SpecialStringCompareTo
+ * -XX:SpecialStringIndexOf
+ */
+ private void checkIntrinsics(Operation op, Method m, String latin1, String utf16, Test antn) throws Exception {
+ for (int i = 0; i < 50_000; ++i) {
+ // Copy and permute latin1 and UTF16 string
+ char[] arrL = latin1.toCharArray();
+ int indexL = i % arrL.length;
+ int mod = (arrL.length - arrL[indexL]);
+ int incL = i % ((mod != 0) ? mod : 1);
+ arrL[indexL] = (char) ((int) arrL[indexL] + incL);
+ String latin1Copy = String.valueOf(arrL);
+
+ char[] arrU = utf16.toCharArray();
+ int indexU = i % arrU.length;
+ mod = (arrU.length - arrU[indexU]);
+ int incU = i % ((mod != 0) ? mod : 1);
+ arrU[indexU] = (char) ((int) arrU[indexU] + incU);
+ String utf16Copy = String.valueOf(arrU);
+
+ switch (op) {
+ case ARR_EQUALS_B:
+ invokeAndCheck(m, (incL == 0), latin1.getBytes("ISO-8859-1"), latin1Copy.getBytes("ISO-8859-1"));
+ invokeAndCheck(m, true, new byte[] {1, 2, 3}, new byte[] {1, 2, 3});
+ invokeAndCheck(m, true, new byte[] {1}, new byte[] {1});
+ invokeAndCheck(m, true, new byte[] {}, new byte[] {});
+ break;
+ case ARR_EQUALS_C:
+ invokeAndCheck(m, (incU == 0), utf16.toCharArray(), arrU);
+ break;
+ case EQUALS:
+ invokeAndCheck(m, (incL == 0), latin1, latin1Copy);
+ invokeAndCheck(m, false, latin1, "");
+ invokeAndCheck(m, false, "", latin1);
+
+ invokeAndCheck(m, (incU == 0), utf16, utf16Copy);
+ invokeAndCheck(m, false, utf16, "");
+ invokeAndCheck(m, false, "", utf16);
+
+ invokeAndCheck(m, false, latin1, utf16);
+ break;
+ case COMPARE_TO:
+ invokeAndCheck(m, -incL, latin1, latin1Copy);
+ invokeAndCheck(m, latin1.length(), latin1, "");
+
+ invokeAndCheck(m, -incU, utf16, utf16Copy);
+ invokeAndCheck(m, utf16.length(), utf16, "");
+
+ // Cross coder
+ char cL = latin1.charAt(indexL);
+ char cU = utf16.charAt(indexU);
+ invokeAndCheck(m, cL - cU, latin1, latin1.replace(cL, cU));
+ invokeAndCheck(m, cU - cL, utf16, utf16.replace(cU, cL));
+
+ // Different lengths
+ invokeAndCheck(m, 1, "ABCD", "ABC");
+ invokeAndCheck(m, -1, "\uff21\uff22\uff23", "\uff21\uff22\uff23\uff24");
+ invokeAndCheck(m, 1, "ABC\uff24", "ABC");
+ invokeAndCheck(m, 3, "ABC\uff24\uff25\uff26", "ABC");
+ invokeAndCheck(m, -1, "ABC","ABC\uff24");
+ invokeAndCheck(m, -3, "ABC","ABC\uff24\uff25\uff26");
+ break;
+ case INDEX_OF:
+ invokeAndCheck(m, indexL, latin1, latin1.substring(indexL), (indexL > 42) ? 42 : 0);
+ invokeAndCheck(m, 0, latin1, "", 0);
+
+ invokeAndCheck(m, indexU, utf16, utf16.substring(indexU), (indexU > 42) ? 42 : 0);
+ invokeAndCheck(m, 0, utf16, "", 0);
+
+ // Cross coder
+ invokeAndCheck(m, -1, latin1.substring(0, indexL), utf16.substring(indexU), (indexL > 42) ? 42 : 0);
+ // Skip latin1 chars in utf16 string
+ int start = 256;
+ int end = indexU > start ? indexU : start;
+ invokeAndCheck(m, end-start, utf16.substring(start, end) + latin1.substring(indexL), latin1.substring(indexL), 0);
+ break;
+ case INDEX_OF_CON_L:
+ invokeAndCheck(m, antn.constString(), latin1);
+ break;
+ case INDEX_OF_CON_U:
+ invokeAndCheck(m, antn.constString(), utf16);
+ break;
+ case INDEX_OF_CON_UL:
+ invokeAndCheck(m, antn.constString(), utf16);
+ break;
+ case INDEX_OF_CHAR:
+ invokeAndCheck(m, 7, "abcdefg\uD800\uDC00", 65536, 0);
+ invokeAndCheck(m, -1, "abcdefg\uD800\uDC01", 65536, 0);
+ invokeAndCheck(m, -1, "abcdefg\uD800", 65536, 0);
+ invokeAndCheck(m, 3, "abc\u0107", 263, 0);
+ invokeAndCheck(m, -1, "abc\u0108", 263, 0);
+ invokeAndCheck(m, 7, "abcdefg\u0107", 263, 0);
+ invokeAndCheck(m, 7, "abcdefg\u0107", 263, -1);
+ invokeAndCheck(m, 0, "\u0107", 263, 0);
+ break;
+ default:
+ throw new RuntimeException("Unexpected operation.");
+ }
+ }
+ }
+
+ /**
+ * Checks correctness of the C2 string concatenation optimization.
+ * -XX:OptimizeStringConcat
+ */
+ private void checkStringConcat(Operation op, Method m, Test antn) throws Exception {
+ for (int i = 0; i < 50_000; ++i) {
+ String[] result = antn.outStrings();
+ switch(op) {
+ case CONCAT:
+ String[] strs = antn.inStrings();
+ for (int j = 0; j < strs.length; ++j) {
+ invokeAndCheck(m, result[j], strs[j]);
+ }
+ break;
+ case CONCAT_C:
+ char[] ch = antn.inChars();
+ for (int j = 0; j < ch.length; ++j) {
+ invokeAndCheck(m, result[j], ch[j]);
+ }
+ break;
+ case CONCAT_I:
+ int[] k = antn.inInts();
+ for (int j = 0; j < k.length; ++j) {
+ invokeAndCheck(m, result[j], k[j]);
+ }
+ break;
+ case CONCAT_M:
+ strs = antn.inStrings();
+ ch = antn.inChars();
+ k = antn.inInts();
+ for (int j = 0; j < strs.length; ++j) {
+ invokeAndCheck(m, result[j], strs[j], ch[j], k[j]);
+ }
+ break;
+ default:
+ throw new RuntimeException("Unexpected operation.");
+ }
+ }
+ }
+
+ /**
+ * Invokes method 'm' by passing arguments 'args' and checks if the
+ * returned value equals 'expectedResult'.
+ */
+ private void invokeAndCheck(Method m, Object expectedResult, Object... args) throws Exception {
+ Object result = m.invoke(null, args);
+ if (!result.equals(expectedResult)) {
+// System.out.println("Expected:");
+// System.out.println(expectedResult);
+// System.out.println("Returned:");
+// System.out.println(result);
+ throw new RuntimeException("Result of '" + m.getName() + "' not equal to expected value.");
+ }
+ }
+
+ /*
+ * Constants
+ */
+ static final char charU = '\uff21';
+ static final char charL = 'A';
+ static final String emptyString = "";
+ static final String stringL = "abcdefghijklmnop";
+ static final String stringSmallL = "abc";
+ static final String stringU = "\u0f21\u0f22\u0f23\u0f24\u0f25\u0f26\u0f27\u0f28";
+ static final String stringSmallU = "\u0f21\u0f22\u0f23";
+ static final int constInt = 123;
+ static final int constIntNeg = -123;
+
+ /*
+ * Arrays.equals
+ */
+ @Test(op = Operation.ARR_EQUALS_B)
+ public static boolean arrayEqualsB(byte[] a, byte[] b) {
+ return Arrays.equals(a, b);
+ }
+
+ @Test(op = Operation.ARR_EQUALS_C)
+ public static boolean arrayEqualsC(char[] a, char[] b) {
+ return Arrays.equals(a, b);
+ }
+
+ /*
+ * String.equals
+ */
+ @Test(op = Operation.EQUALS)
+ public static boolean equals(String a, String b) {
+ return a.equals(b);
+ }
+
+ /*
+ * String.compareTo
+ */
+ @Test(op = Operation.COMPARE_TO)
+ public static int compareTo(String a, String b) {
+ return a.compareTo(b);
+ }
+
+ /*
+ * String.indexOf
+ */
+ @Test(op = Operation.INDEX_OF)
+ public static int indexOf(String a, String b, int from) {
+ return a.indexOf(b, from);
+ }
+
+ @Test(op = Operation.INDEX_OF_CON_U, constString = stringSmallU)
+ public static String indexOfConstU(String a) {
+ int result = a.indexOf(stringSmallU);
+ return a.substring(result, result + stringSmallU.length());
+ }
+
+ @Test(op = Operation.INDEX_OF_CON_U, constString = stringU)
+ public static String indexOfConstLargeU(String a) {
+ int result = a.indexOf(stringU);
+ return a.substring(result, result + stringU.length());
+ }
+
+ @Test(op = Operation.INDEX_OF_CON_U, constString = emptyString)
+ public static String indexOfConstEmptyU(String a) {
+ int result = a.indexOf(emptyString);
+ return a.substring(result, result + emptyString.length());
+ }
+
+ @Test(op = Operation.INDEX_OF_CON_L, constString = stringSmallL)
+ public static String indexOfConstL(String a) {
+ int result = a.indexOf(stringSmallL);
+ return a.substring(result, result + stringSmallL.length());
+ }
+
+ @Test(op = Operation.INDEX_OF_CON_L, constString = stringL)
+ public static String indexOfConstLargeL(String a) {
+ int result = a.indexOf(stringL);
+ return a.substring(result, result + stringL.length());
+ }
+
+ @Test(op = Operation.INDEX_OF_CON_L, constString = emptyString)
+ public static String indexOfConstEmptyL(String a) {
+ int result = a.indexOf(emptyString);
+ return a.substring(result, result + emptyString.length());
+ }
+
+ @Test(op = Operation.INDEX_OF_CON_UL, constString = stringSmallL)
+ public static String indexOfConstUL(String a) {
+ int result = a.indexOf(stringSmallL);
+ return a.substring(result, result + stringSmallL.length());
+ }
+
+ @Test(op = Operation.INDEX_OF_CON_UL, constString = stringL)
+ public static String indexOfConstLargeUL(String a) {
+ int result = a.indexOf(stringL);
+ return a.substring(result, result + stringL.length());
+ }
+
+ @Test(op = Operation.INDEX_OF_CHAR)
+ public static int indexOfChar(String a, int ch, int from) {
+ return a.indexOf(ch, from);
+ }
+
+ /*
+ * String concatenation optimization
+ */
+ @Test(op = Operation.CONCAT, inStrings = {"ABC", "\uff21\uff22\uff23"}, outStrings = {"ABC", "\uff21\uff22\uff23"})
+ public static String concatString(String a) {
+ return new StringBuilder().append(a).toString();
+ }
+
+ @Test(op = Operation.CONCAT, inStrings = {""}, outStrings = {""})
+ public static String concatStringEmpty(String a) {
+ return new StringBuilder().toString();
+ }
+
+ @Test(op = Operation.CONCAT, inStrings = {""}, outStrings = {"null"})
+ public static String concatStringNull(String a) {
+ return new StringBuilder().append((String)null).toString();
+ }
+
+ @Test(op = Operation.CONCAT, inStrings = {"ABC", "\uff21\uff22\uff23"}, outStrings = {"abcdefghijklmnopABCabc", "abcdefghijklmnop\uff21\uff22\uff23abc"})
+ public static String concatStringConstL(String a) {
+ return new StringBuilder().append(stringL).append(a).append(stringSmallL).toString();
+ }
+
+ @Test(op = Operation.CONCAT, inStrings = {"ABC", "\uff21\uff22\uff23"}, outStrings = {"\u0f21\u0f22\u0f23ABC\u0f21\u0f22\u0f23\u0f24\u0f25\u0f26\u0f27\u0f28", "\u0f21\u0f22\u0f23\uff21\uff22\uff23\u0f21\u0f22\u0f23\u0f24\u0f25\u0f26\u0f27\u0f28"})
+ public static String concatStringConstU(String a) {
+ return new StringBuilder().append(stringSmallU).append(a).append(stringU).toString();
+ }
+
+ @Test(op = Operation.CONCAT_C, inChars = {'A', '\uff21'}, outStrings = {"A", "\uff21"})
+ public static String concatChar(char a) {
+ return new StringBuilder().append(a).toString();
+ }
+
+ @Test(op = Operation.CONCAT_C, inChars = {'A', '\uff21'}, outStrings = {"abcdefghijklmnopAabcA\uff21", "abcdefghijklmnop\uff21abcA\uff21"})
+ public static String concatCharConstL(char a) {
+ return new StringBuilder().append(stringL).append(a).append(stringSmallL).append(charL).append(charU).toString();
+ }
+
+ @Test(op = Operation.CONCAT_C, inChars = {'A', '\uff21'}, outStrings = {"\u0f21\u0f22\u0f23A\u0f21\u0f22\u0f23\u0f24\u0f25\u0f26\u0f27\u0f28\uff21A", "\u0f21\u0f22\u0f23\uff21\u0f21\u0f22\u0f23\u0f24\u0f25\u0f26\u0f27\u0f28\uff21A"})
+ public static String concatCharConstU(char a) {
+ return new StringBuilder().append(stringSmallU).append(a).append(stringU).append(charU).append(charL).toString();
+ }
+
+ @Test(op = Operation.CONCAT_I, inInts = {Integer.MIN_VALUE, -42, 42, Integer.MAX_VALUE}, outStrings = {"-2147483648", "-42", "42", "2147483647"})
+ public static String concatInt(int a) {
+ return new StringBuilder().append(a).toString();
+ }
+
+ @Test(op = Operation.CONCAT_I, inInts = {Integer.MIN_VALUE, -42, 42, Integer.MAX_VALUE}, outStrings = {"abcdefghijklmnop-2147483648abc123-123", "abcdefghijklmnop-42abc123-123", "abcdefghijklmnop42abc123-123", "abcdefghijklmnop2147483647abc123-123"})
+ public static String concatIntConstL(int b) {
+ return new StringBuilder().append(stringL).append(b).append(stringSmallL).append(constInt).append(constIntNeg).toString();
+ }
+
+ @Test(op = Operation.CONCAT_I, inInts = {Integer.MIN_VALUE, -42, 42, Integer.MAX_VALUE}, outStrings = {"\u0f21\u0f22\u0f23-2147483648\u0f21\u0f22\u0f23\u0f24\u0f25\u0f26\u0f27\u0f28123-123", "\u0f21\u0f22\u0f23-42\u0f21\u0f22\u0f23\u0f24\u0f25\u0f26\u0f27\u0f28123-123", "\u0f21\u0f22\u0f2342\u0f21\u0f22\u0f23\u0f24\u0f25\u0f26\u0f27\u0f28123-123", "\u0f21\u0f22\u0f232147483647\u0f21\u0f22\u0f23\u0f24\u0f25\u0f26\u0f27\u0f28123-123"})
+ public static String concatIntConstU(int b) {
+ return new StringBuilder().append(stringSmallU).append(b).append(stringU).append(constInt).append(constIntNeg).toString();
+ }
+
+ @Test(op = Operation.CONCAT, inStrings = {""}, outStrings = {"nullabcabcdefghijklmnopA123-123"})
+ public static String concatConstL(String a) {
+ return new StringBuilder().append((String)null).append(stringSmallL).append(stringL).append(charL).append(constInt).append(constIntNeg).toString();
+ }
+
+ @Test(op = Operation.CONCAT, inStrings = {""}, outStrings = {"nullabcabcdefghijklmnop\u0f21\u0f22\u0f23\u0f21\u0f22\u0f23\u0f24\u0f25\u0f26\u0f27\u0f28A\uff21123-123"})
+ public static String concatConstU(String a) {
+ return new StringBuilder().append((String)null).append(stringSmallL).append(stringL).append(stringSmallU).append(stringU).append(charL).append(charU).append(constInt).append(constIntNeg).toString();
+ }
+
+ @Test(op = Operation.CONCAT_M,
+ inStrings = {"ABCDEFG", "ABCDEFG", "\u0f21\u0f22\u0f23\u0f24\u0f25\u0f26\u0f27\u0f28", "\u0f21\u0f22\u0f23\u0f24\u0f25\u0f26\u0f27\u0f28"},
+ inChars = {'A', '\uff21', 'A', '\uff21'},
+ inInts = {Integer.MIN_VALUE, Integer.MAX_VALUE, Integer.MIN_VALUE, Integer.MAX_VALUE},
+ outStrings = {"ABCDEFGA-2147483648nullabcdefghijklmnop123-123A\u0f21\u0f22\u0f23\u0f24\u0f25\u0f26\u0f27\u0f28\uff21ABCDEFGA-2147483648null",
+ "ABCDEFG\uff212147483647nullabcdefghijklmnop123-123A\u0f21\u0f22\u0f23\u0f24\u0f25\u0f26\u0f27\u0f28\uff21ABCDEFG\uff212147483647null",
+ "\u0f21\u0f22\u0f23\u0f24\u0f25\u0f26\u0f27\u0f28A-2147483648nullabcdefghijklmnop123-123A\u0f21\u0f22\u0f23\u0f24\u0f25\u0f26\u0f27\u0f28\uff21\u0f21\u0f22\u0f23\u0f24\u0f25\u0f26\u0f27\u0f28A-2147483648null",
+ "\u0f21\u0f22\u0f23\u0f24\u0f25\u0f26\u0f27\u0f28\uff212147483647nullabcdefghijklmnop123-123A\u0f21\u0f22\u0f23\u0f24\u0f25\u0f26\u0f27\u0f28\uff21\u0f21\u0f22\u0f23\u0f24\u0f25\u0f26\u0f27\u0f28\uff212147483647null"})
+ public static String concatMixed(String a, char b, int c) {
+ return new StringBuilder().append(a).append(b).append(c).append((String)null)
+ .append(stringL).append(constInt).append(constIntNeg).append(charL).append(stringU).append(charU)
+ .append(a).append(b).append(c).append((String)null).toString();
+ }
+}