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
27 import java.lang.management.GarbageCollectorMXBean;
28 import java.lang.management.ManagementFactory;
29 import java.lang.reflect.Method;
30 import java.util.Collection;
31 import java.util.List;
32 import java.util.function.Function;
33 import jdk.testlibrary.Utils;
34 import jdk.testlibrary.TimeLimitedRunner;
35
36 /**
37 * Lambda forms caching test case class. Contains all necessary test routines to
38 * test lambda forms caching in method handles returned by methods of
39 * MethodHandles class.
40 *
41 * @author kshefov
42 */
43 public abstract class LambdaFormTestCase {
44
45 private final static String METHOD_HANDLE_CLASS_NAME = "java.lang.invoke.MethodHandle";
46 private final static String INTERNAL_FORM_METHOD_NAME = "internalForm";
47 private static final double ITERATIONS_TO_CODE_CACHE_SIZE_RATIO
48 = 45 / (128.0 * 1024 * 1024);
49 private static final long TIMEOUT = Helper.IS_THOROUGH ? 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 final static Method INTERNAL_FORM;
56 private static final List<GarbageCollectorMXBean> gcInfo;
57
58 private static long gcCount() {
59 return gcInfo.stream().mapToLong(GarbageCollectorMXBean::getCollectionCount).sum();
60 }
61
62 static {
63 try {
64 Class mhClass = Class.forName(METHOD_HANDLE_CLASS_NAME);
65 INTERNAL_FORM = mhClass.getDeclaredMethod(INTERNAL_FORM_METHOD_NAME);
66 INTERNAL_FORM.setAccessible(true);
67 } catch (Exception ex) {
68 throw new Error("Unexpected exception: ", ex);
69 }
70
71 gcInfo = ManagementFactory.getGarbageCollectorMXBeans();
72 if (gcInfo.size() == 0) {
73 throw new Error("No GarbageCollectorMXBeans found.");
74 }
75 }
76
77 private final TestMethods testMethod;
78 private static long totalIterations = 0L;
79 private static long doneIterations = 0L;
80 private static boolean passed = true;
81 private static int testCounter = 0;
82 private static int failCounter = 0;
83 private long gcCountAtStart;
84
85 /**
86 * Test case constructor. Generates test cases with random method types for
87 * given methods form {@code j.l.i.MethodHandles} class.
88 *
89 * @param testMethod A method from {@code j.l.i.MethodHandles} class which
90 * returns a {@code j.l.i.MethodHandle}.
91 */
92 protected LambdaFormTestCase(TestMethods testMethod) {
93 this.testMethod = testMethod;
94 this.gcCountAtStart = gcCount();
95 }
96
97 public TestMethods getTestMethod() {
98 return testMethod;
99 }
100
101 protected boolean noGCHappened() {
102 return gcCount() == gcCountAtStart;
103 }
104
105 /**
106 * Routine that executes a test case.
107 */
108 public abstract void doTest();
109
110 /**
111 * Runs a number of test cases defined by the size of testCases list.
112 *
113 * @param ctor constructor of LambdaFormCachingTest or its child classes
114 * object.
115 * @param testMethods list of test methods
116 */
117 public static void runTests(Function<TestMethods, LambdaFormTestCase> ctor, Collection<TestMethods> testMethods) {
118 long testCaseNum = testMethods.size();
119 totalIterations = Math.max(1, Helper.TEST_LIMIT / testCaseNum);
120 System.out.printf("Number of iterations according to -DtestLimit is %d (%d cases)%n",
121 totalIterations, totalIterations * testCaseNum);
122 HotSpotDiagnosticMXBean hsDiagBean = ManagementFactory.getPlatformMXBean(HotSpotDiagnosticMXBean.class);
123 long codeCacheSize = Long.parseLong(
124 hsDiagBean.getVMOption("ReservedCodeCacheSize").getValue());
125 System.out.printf("Code Cache Size is %d bytes%n", codeCacheSize);
126 long iterationsByCodeCacheSize = (long) (codeCacheSize
127 * ITERATIONS_TO_CODE_CACHE_SIZE_RATIO);
128 System.out.printf("Number of iterations limited by code cache size is %d (%d cases)%n",
129 iterationsByCodeCacheSize, iterationsByCodeCacheSize * testCaseNum);
130 if (totalIterations > iterationsByCodeCacheSize) {
131 totalIterations = iterationsByCodeCacheSize;
132 }
133 System.out.printf("Number of iterations is set to %d (%d cases)%n",
134 totalIterations, totalIterations * testCaseNum);
135 System.out.flush();
136 TimeLimitedRunner runner = new TimeLimitedRunner(TIMEOUT, 4.0d,
137 () -> {
138 if (doneIterations >= totalIterations) {
139 return false;
140 }
141 System.err.println(String.format("Iteration %d:", doneIterations));
142 for (TestMethods testMethod : testMethods) {
143 LambdaFormTestCase testCase = ctor.apply(testMethod);
144 try {
145 System.err.printf("Tested LF caching feature with MethodHandles.%s method.%n",
146 testCase.getTestMethod().name);
147 testCase.doTest();
148 System.err.println("PASSED");
149 } catch (Throwable t) {
150 t.printStackTrace();
151 System.err.println("FAILED");
152 passed = false;
153 failCounter++;
154 }
155 testCounter++;
156 }
157 doneIterations++;
158 return true;
159 });
160 try {
161 runner.call();
162 } catch (Throwable t) {
163 t.printStackTrace();
164 System.err.println("FAILED");
165 throw new Error("Unexpected error!");
166 }
167 if (!passed) {
168 throw new Error(String.format("%d of %d test cases FAILED! %n"
169 + "Rerun the test with the same \"-Dseed=\" option as in the log file!",
170 failCounter, testCounter));
171 } else {
172 System.err.println(String.format("All %d test cases PASSED!", testCounter));
173 }
174 }
175 }