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 import jdk.testlibrary.Utils;
31
32 /**
33 * Lambda forms caching test case class. Contains all necessary test routines to
34 * test lambda forms caching in method handles returned by methods of
35 * MethodHandles class.
36 *
37 * @author kshefov
38 */
39 public abstract class LambdaFormTestCase {
40
41 private final static String METHOD_HANDLE_CLASS_NAME = "java.lang.invoke.MethodHandle";
42 private final static String INTERNAL_FORM_METHOD_NAME = "internalForm";
43 private static final double ITERATIONS_TO_CODE_CACHE_SIZE_RATIO
44 = 45 / (128.0 * 1024 * 1024);
45 private static final long TIMEOUT = Utils.adjustTimeout(Utils.DEFAULT_TEST_TIMEOUT);
46
47 /**
48 * Reflection link to {@code j.l.i.MethodHandle.internalForm} method. It is
49 * used to get a lambda form from a method handle.
50 */
51 protected final static Method INTERNAL_FORM;
52
53 static {
54 try {
55 Class mhClass = Class.forName(METHOD_HANDLE_CLASS_NAME);
56 INTERNAL_FORM = mhClass.getDeclaredMethod(INTERNAL_FORM_METHOD_NAME);
57 INTERNAL_FORM.setAccessible(true);
58 } catch (Exception ex) {
59 throw new Error("Unexpected exception: ", ex);
60 }
61 }
62
63 private final TestMethods testMethod;
64
65 /**
66 * Test case constructor. Generates test cases with random method types for
67 * given methods form {@code j.l.i.MethodHandles} class.
68 *
69 * @param testMethod A method from {@code j.l.i.MethodHandles} class which
70 * returns a {@code j.l.i.MethodHandle}.
71 */
72 protected LambdaFormTestCase(TestMethods testMethod) {
73 this.testMethod = testMethod;
74 }
75
76 public TestMethods getTestMethod() {
77 return testMethod;
78 }
79
80 /**
81 * Routine that executes a test case.
82 */
83 public abstract void doTest();
84
85 /**
86 * Runs a number of test cases defined by the size of testCases list.
87 *
88 * @param ctor constructor of LambdaFormCachingTest or its child classes
89 * object.
90 * @param testMethods list of test methods
91 */
92 public static void runTests(Function<TestMethods, LambdaFormTestCase> ctor, Collection<TestMethods> testMethods) {
93 boolean passed = true;
94 int testCounter = 0;
95 int failCounter = 0;
96 long testCaseNum = testMethods.size();
97 long iterations = Math.max(1, Helper.TEST_LIMIT / testCaseNum);
98 System.out.printf("Number of iterations according to -DtestLimit is %d (%d cases)%n",
99 iterations, iterations * testCaseNum);
100 HotSpotDiagnosticMXBean hsDiagBean = ManagementFactory.getPlatformMXBean(HotSpotDiagnosticMXBean.class);
101 long codeCacheSize = Long.parseLong(
102 hsDiagBean.getVMOption("ReservedCodeCacheSize").getValue());
103 System.out.printf("Code Cache Size is %d bytes%n", codeCacheSize);
104 long iterationsByCodeCacheSize = (long) (codeCacheSize
105 * ITERATIONS_TO_CODE_CACHE_SIZE_RATIO);
106 System.out.printf("Number of iterations limited by code cache size is %d (%d cases)%n",
107 iterationsByCodeCacheSize, iterationsByCodeCacheSize * testCaseNum);
108 if (iterations > iterationsByCodeCacheSize) {
109 iterations = iterationsByCodeCacheSize;
110 }
111 System.out.printf("Number of iterations is set to %d (%d cases)%n",
112 iterations, iterations * testCaseNum);
113 System.out.flush();
114 long maxIterTime = 0;
115 long startTime = System.currentTimeMillis();
116 for (long i = 0; i < iterations; i++) {
117 long startIterTime = System.currentTimeMillis();
118 System.err.println(String.format("Iteration %d:", i));
119 for (TestMethods testMethod : testMethods) {
120 LambdaFormTestCase testCase = ctor.apply(testMethod);
121 try {
122 System.err.printf("Tested LF caching feature with MethodHandles.%s method.%n",
123 testCase.getTestMethod().name);
124 testCase.doTest();
125 System.err.println("PASSED");
126 } catch (Throwable t) {
127 t.printStackTrace();
128 System.err.println("FAILED");
129 passed = false;
130 failCounter++;
131 }
132 testCounter++;
133 }
134 long passedTime = System.currentTimeMillis() - startTime;
135 long iterTime = System.currentTimeMillis() - startIterTime;
136 maxIterTime = Math.max(maxIterTime, iterTime);
137 long remainTime = TIMEOUT - passedTime;
138 if (4 * maxIterTime > remainTime) {
139 System.err.printf("Stopping iterations because of lack of time.%n"
140 + "Increase timeout factor for more iterations.%n");
141 break;
142 }
143 }
144 if (!passed) {
145 throw new Error(String.format("%d of %d test cases FAILED! %n"
146 + "Rerun the test with the same \"-Dseed=\" option as in the log file!",
147 failCounter, testCounter));
148 } else {
149 System.err.println(String.format("All %d test cases PASSED!", testCounter));
150 }
151 }
152 }