1 /* 2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 import com.oracle.testlibrary.jsr292.Helper; 25 import com.sun.management.HotSpotDiagnosticMXBean; 26 import java.lang.management.ManagementFactory; 27 import java.lang.reflect.Method; 28 import java.util.Collection; 29 import java.util.function.Function; 30 31 /** 32 * Lambda forms caching test case class. Contains all necessary test routines to 33 * test lambda forms caching in method handles returned by methods of 34 * MethodHandles class. 35 * 36 * @author kshefov 37 */ 38 public abstract class LambdaFormTestCase { 39 40 private final static String METHOD_HANDLE_CLASS_NAME = "java.lang.invoke.MethodHandle"; 41 private final static String INTERNAL_FORM_METHOD_NAME = "internalForm"; 42 private static final double ITERATIONS_TO_CODE_CACHE_SIZE_RATIO 43 = 45 / (128.0 * 1024 * 1024); 44 45 /** 46 * Reflection link to {@code j.l.i.MethodHandle.internalForm} method. It is 47 * used to get a lambda form from a method handle. 48 */ 49 protected final static Method INTERNAL_FORM; 50 51 static { 52 try { 53 Class mhClass = Class.forName(METHOD_HANDLE_CLASS_NAME); 54 INTERNAL_FORM = mhClass.getDeclaredMethod(INTERNAL_FORM_METHOD_NAME); 55 INTERNAL_FORM.setAccessible(true); 56 } catch (Exception ex) { 57 throw new Error("Unexpected exception: ", ex); 58 } 59 } 60 61 private final TestMethods testMethod; 62 63 /** 64 * Test case constructor. Generates test cases with random method types for 65 * given methods form {@code j.l.i.MethodHandles} class. 66 * 67 * @param testMethod A method from {@code j.l.i.MethodHandles} class which 68 * returns a {@code j.l.i.MethodHandle}. 69 */ 70 protected LambdaFormTestCase(TestMethods testMethod) { 71 this.testMethod = testMethod; 72 } 73 74 public TestMethods getTestMethod() { 75 return testMethod; 76 } 77 78 /** 79 * Routine that executes a test case. 80 */ 81 public abstract void doTest(); 82 83 /** 84 * Runs a number of test cases defined by the size of testCases list. 85 * 86 * @param ctor constructor of LambdaFormCachingTest or its child classes 87 * object. 88 * @param testMethods list of test methods 89 */ 90 public static void runTests(Function<TestMethods, LambdaFormTestCase> ctor, Collection<TestMethods> testMethods) { 91 boolean passed = true; 92 int testCounter = 0; 93 int failCounter = 0; 94 long testCaseNum = testMethods.size(); 95 long iterations = Math.max(1, Helper.TEST_LIMIT / testCaseNum); 96 System.out.printf("Number of iterations according to -DtestLimit is %d (%d cases)%n", 97 iterations, iterations * testCaseNum); 98 HotSpotDiagnosticMXBean hsDiagBean = ManagementFactory.getPlatformMXBean(HotSpotDiagnosticMXBean.class); 99 long codeCacheSize = Long.parseLong( 100 hsDiagBean.getVMOption("ReservedCodeCacheSize").getValue()); 101 System.out.printf("Code Cache Size is %d bytes%n", codeCacheSize); 102 long iterationsByCodeCacheSize = (long) (codeCacheSize 103 * ITERATIONS_TO_CODE_CACHE_SIZE_RATIO); 104 System.out.printf("Number of iterations limited by code cache size is %d (%d cases)%n", 105 iterationsByCodeCacheSize, iterationsByCodeCacheSize * testCaseNum); 106 if (iterations > iterationsByCodeCacheSize) { 107 iterations = iterationsByCodeCacheSize; 108 } 109 System.out.printf("Number of iterations is set to %d (%d cases)%n", 110 iterations, iterations * testCaseNum); 111 System.out.flush(); 112 for (long i = 0; i < iterations; i++) { 113 System.err.println(String.format("Iteration %d:", i)); 114 for (TestMethods testMethod : testMethods) { 115 LambdaFormTestCase testCase = ctor.apply(testMethod); 116 try { 117 System.err.printf("Tested LF caching feature with MethodHandles.%s method.%n", 118 testCase.getTestMethod().name); 119 testCase.doTest(); 120 System.err.println("PASSED"); 121 } catch (Throwable t) { 122 t.printStackTrace(); 123 System.err.println("FAILED"); 124 passed = false; 125 failCounter++; 126 } 127 testCounter++; 128 } 129 } 130 if (!passed) { 131 throw new Error(String.format("%d of %d test cases FAILED! %n" 132 + "Rerun the test with the same \"-Dseed=\" option as in the log file!", 133 failCounter, testCounter)); 134 } else { 135 System.err.println(String.format("All %d test cases PASSED!", testCounter)); 136 } 137 } 138 }