1 /* 2 * Copyright (c) 2014, 2017, 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 jdk.testlibrary.TimeLimitedRunner; 25 import jdk.testlibrary.Utils; 26 import test.java.lang.invoke.lib.CodeCacheOverflowProcessor; 27 import test.java.lang.invoke.lib.Helper; 28 29 import java.lang.invoke.MethodHandle; 30 import java.lang.management.GarbageCollectorMXBean; 31 import java.lang.management.ManagementFactory; 32 import java.lang.ref.Reference; 33 import java.lang.reflect.Field; 34 import java.lang.reflect.Method; 35 import java.util.Collection; 36 import java.util.List; 37 import java.util.function.Function; 38 39 /** 40 * Lambda forms caching test case class. Contains all necessary test routines to 41 * test lambda forms caching in method handles returned by methods of 42 * MethodHandles class. 43 * 44 * @author kshefov 45 */ 46 public abstract class LambdaFormTestCase { 47 48 private static final long TIMEOUT = Helper.IS_THOROUGH ? 49 0L : (long) (Utils.adjustTimeout(Utils.DEFAULT_TEST_TIMEOUT) * 0.9); 50 51 /** 52 * Reflection link to {@code j.l.i.MethodHandle.internalForm} method. It is 53 * used to get a lambda form from a method handle. 54 */ 55 protected static final Method INTERNAL_FORM; 56 protected static final Field KIND_FIELD; 57 protected static final Field REF_FIELD; 58 private static final List<GarbageCollectorMXBean> gcInfo; 59 60 private static long gcCount() { 61 return gcInfo.stream().mapToLong(GarbageCollectorMXBean::getCollectionCount).sum(); 62 } 63 64 static { 65 try { 66 INTERNAL_FORM = MethodHandle.class.getDeclaredMethod("internalForm"); 67 INTERNAL_FORM.setAccessible(true); 68 69 KIND_FIELD = Class.forName("java.lang.invoke.LambdaForm").getDeclaredField("kind"); 70 KIND_FIELD.setAccessible(true); 71 72 REF_FIELD = Reference.class.getDeclaredField("referent"); 73 REF_FIELD.setAccessible(true); 74 } catch (Exception ex) { 75 throw new Error("Unexpected exception", ex); 76 } 77 78 gcInfo = ManagementFactory.getGarbageCollectorMXBeans(); 79 if (gcInfo.size() == 0) { 80 throw new Error("No GarbageCollectorMXBeans found."); 81 } 82 } 83 84 private final TestMethods testMethod; 85 private long gcCountAtStart; 86 87 private static class TestRun { 88 89 final Function<TestMethods, LambdaFormTestCase> ctor; 90 final Collection<TestMethods> testMethods; 91 final long totalIterations; 92 long doneIterations; 93 long testCounter; 94 long failCounter; 95 boolean passed; 96 97 TestRun(Function<TestMethods, LambdaFormTestCase> ctor, 98 Collection<TestMethods> testMethods) { 99 this.ctor = ctor; 100 this.testMethods = testMethods; 101 long testCaseNum = testMethods.size(); 102 long iterations = Math.max(1, Helper.TEST_LIMIT / testCaseNum); 103 System.out.printf("Number of iterations according to -DtestLimit is %d (%d cases)%n", 104 iterations, iterations * testCaseNum); 105 System.out.printf("Number of iterations is set to %d (%d cases)%n", 106 iterations, iterations * testCaseNum); 107 System.out.flush(); 108 totalIterations = iterations; 109 doneIterations = 0L; 110 testCounter = 0L; 111 failCounter = 0L; 112 passed = true; 113 } 114 115 Boolean doIteration() { 116 if (doneIterations >= totalIterations) { 117 return false; 118 } 119 System.err.println(String.format("Iteration %d:", doneIterations)); 120 for (TestMethods testMethod : testMethods) { 121 LambdaFormTestCase testCase = ctor.apply(testMethod); 122 try { 123 System.err.printf("Tested LF caching feature" 124 + " with MethodHandles.%s method.%n", 125 testCase.getTestMethod().name); 126 Throwable t = CodeCacheOverflowProcessor 127 .runMHTest(testCase::doTest); 128 if (t != null) { 129 return false; 130 } 131 System.err.println("PASSED"); 132 } catch (OutOfMemoryError oome) { 133 // Don't swallow OOME so a heap dump can be created. 134 System.err.println("FAILED"); 135 throw oome; 136 } catch (Throwable t) { 137 t.printStackTrace(); 138 System.err.printf("FAILED. Caused by %s%n", t.getMessage()); 139 passed = false; 140 failCounter++; 141 } 142 testCounter++; 143 } 144 doneIterations++; 145 return true; 146 } 147 } 148 149 /** 150 * Test case constructor. Generates test cases with random method types for 151 * given methods form {@code j.l.i.MethodHandles} class. 152 * 153 * @param testMethod A method from {@code j.l.i.MethodHandles} class which 154 * returns a {@code j.l.i.MethodHandle}. 155 */ 156 protected LambdaFormTestCase(TestMethods testMethod) { 157 this.testMethod = testMethod; 158 this.gcCountAtStart = gcCount(); 159 } 160 161 public TestMethods getTestMethod() { 162 return testMethod; 163 } 164 165 protected boolean noGCHappened() { 166 return gcCount() == gcCountAtStart; 167 } 168 169 /** 170 * Routine that executes a test case. 171 */ 172 public abstract void doTest(); 173 174 /** 175 * Runs a number of test cases defined by the size of testCases list. 176 * 177 * @param ctor constructor of LambdaFormCachingTest or its child classes 178 * object. 179 * @param testMethods list of test methods 180 */ 181 public static void runTests(Function<TestMethods, LambdaFormTestCase> ctor, 182 Collection<TestMethods> testMethods) { 183 LambdaFormTestCase.TestRun run 184 = new LambdaFormTestCase.TestRun(ctor, testMethods); 185 TimeLimitedRunner runner 186 = new TimeLimitedRunner(TIMEOUT, 4.0d, run::doIteration); 187 try { 188 runner.call(); 189 } catch (Exception ex) { 190 System.err.println("FAILED"); 191 throw new Error("Unexpected error!", ex); 192 } 193 if (!run.passed) { 194 throw new Error(String.format("%d of %d test cases FAILED! %n" 195 + "Rerun the test with the same \"-Dseed=\" option as in the log file!", 196 run.failCounter, run.testCounter)); 197 } else { 198 System.err.printf("All %d test cases PASSED!%n", run.testCounter); 199 } 200 } 201 }