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.concurrent.TimeUnit;
30 import java.util.function.Function;
31 import jdk.testlibrary.Utils;
32
33 /**
34 * Lambda forms caching test case class. Contains all necessary test routines to
35 * test lambda forms caching in method handles returned by methods of
36 * MethodHandles class.
37 *
38 * @author kshefov
39 */
40 public abstract class LambdaFormTestCase {
41
42 private final static String METHOD_HANDLE_CLASS_NAME = "java.lang.invoke.MethodHandle";
43 private final static String INTERNAL_FORM_METHOD_NAME = "internalForm";
44 private static final double ITERATIONS_TO_CODE_CACHE_SIZE_RATIO
45 = 45 / (128.0 * 1024 * 1024);
46 private static final long TIMEOUT = Utils.adjustTimeout(TimeUnit.SECONDS.toMillis(120));
47
48 /**
49 * Reflection link to {@code j.l.i.MethodHandle.internalForm} method. It is
50 * used to get a lambda form from a method handle.
51 */
52 protected final static Method INTERNAL_FORM;
53
54 static {
55 try {
56 Class mhClass = Class.forName(METHOD_HANDLE_CLASS_NAME);
57 INTERNAL_FORM = mhClass.getDeclaredMethod(INTERNAL_FORM_METHOD_NAME);
58 INTERNAL_FORM.setAccessible(true);
59 } catch (Exception ex) {
60 throw new Error("Unexpected exception: ", ex);
61 }
62 }
63
64 private final TestMethods testMethod;
65
66 /**
67 * Test case constructor. Generates test cases with random method types for
68 * given methods form {@code j.l.i.MethodHandles} class.
69 *
70 * @param testMethod A method from {@code j.l.i.MethodHandles} class which
71 * returns a {@code j.l.i.MethodHandle}.
72 */
73 protected LambdaFormTestCase(TestMethods testMethod) {
74 this.testMethod = testMethod;
75 }
76
77 public TestMethods getTestMethod() {
78 return testMethod;
79 }
80
81 /**
82 * Routine that executes a test case.
83 */
84 public abstract void doTest();
85
86 /**
87 * Runs a number of test cases defined by the size of testCases list.
88 *
89 * @param ctor constructor of LambdaFormCachingTest or its child classes
90 * object.
91 * @param testMethods list of test methods
92 */
93 public static void runTests(Function<TestMethods, LambdaFormTestCase> ctor, Collection<TestMethods> testMethods) {
94 boolean passed = true;
95 int testCounter = 0;
96 int failCounter = 0;
97 long testCaseNum = testMethods.size();
98 long iterations = Math.max(1, Helper.TEST_LIMIT / testCaseNum);
99 System.out.printf("Number of iterations according to -DtestLimit is %d (%d cases)%n",
100 iterations, iterations * testCaseNum);
101 HotSpotDiagnosticMXBean hsDiagBean = ManagementFactory.getPlatformMXBean(HotSpotDiagnosticMXBean.class);
102 long codeCacheSize = Long.parseLong(
103 hsDiagBean.getVMOption("ReservedCodeCacheSize").getValue());
104 System.out.printf("Code cache size is %d bytes%n", codeCacheSize);
105 long iterationsByCodeCacheSize = (long) (codeCacheSize
106 * ITERATIONS_TO_CODE_CACHE_SIZE_RATIO);
107 long nonProfiledCodeCacheSize = Long.parseLong(
108 hsDiagBean.getVMOption("NonProfiledCodeHeapSize").getValue());
109 System.out.printf("Non-profiled code cache size is %d bytes%n", nonProfiledCodeCacheSize);
110 long iterationsByNonProfiledCodeCacheSize = (long) (nonProfiledCodeCacheSize
111 * ITERATIONS_TO_CODE_CACHE_SIZE_RATIO);
112 System.out.printf("Number of iterations limited by code cache size is %d (%d cases)%n",
113 iterationsByCodeCacheSize, iterationsByCodeCacheSize * testCaseNum);
114 System.out.printf("Number of iterations limited by non-profiled code cache size is %d (%d cases)%n",
115 iterationsByNonProfiledCodeCacheSize, iterationsByNonProfiledCodeCacheSize * testCaseNum);
116 iterations = Math.min(iterationsByCodeCacheSize,
117 Math.min(iterations, iterationsByNonProfiledCodeCacheSize));
118 if (iterations == 0) {
119 System.out.println("Warning: code cache size is too small to provide at"
120 + " least one iteration! Test will try to do one iteration.");
121 iterations = 1;
122 }
123 System.out.printf("Number of iterations is set to %d (%d cases)%n",
124 iterations, iterations * testCaseNum);
125 System.out.flush();
126 long startTime = System.currentTimeMillis();
127 for (long i = 0; i < iterations; i++) {
128 System.err.println(String.format("Iteration %d:", i));
129 for (TestMethods testMethod : testMethods) {
130 LambdaFormTestCase testCase = ctor.apply(testMethod);
131 try {
132 System.err.printf("Tested LF caching feature with MethodHandles.%s method.%n",
133 testCase.getTestMethod().name);
134 testCase.doTest();
135 System.err.println("PASSED");
136 } catch (Throwable t) {
137 t.printStackTrace();
138 System.err.println("FAILED");
139 passed = false;
140 failCounter++;
141 }
142 testCounter++;
143 }
144 long passedTime = System.currentTimeMillis() - startTime;
145 long avgIterTime = passedTime / (i + 1);
146 long remainTime = TIMEOUT - passedTime;
147 if (avgIterTime > 2 * remainTime) {
148 System.err.printf("Stopping iterations because of lack of time.%n"
149 + "Increase timeout factor for more iterations.%n");
150 break;
151 }
152 }
153 if (!passed) {
154 throw new Error(String.format("%d of %d test cases FAILED! %n"
155 + "Rerun the test with the same \"-Dseed=\" option as in the log file!",
156 failCounter, testCounter));
157 } else {
158 System.err.println(String.format("All %d test cases PASSED!", testCounter));
159 }
160 }
161 }