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 long nonProfiledCodeCacheSize = Long.parseLong(
105 hsDiagBean.getVMOption("NonProfiledCodeHeapSize").getValue());
106 System.out.printf("Non-profiled code cache size is %d bytes%n", nonProfiledCodeCacheSize);
107 long iterationsByNonProfiledCodeCacheSize = (long) (nonProfiledCodeCacheSize
108 * ITERATIONS_TO_CODE_CACHE_SIZE_RATIO);
109 System.out.printf("Number of iterations limited by code cache size is %d (%d cases)%n",
110 iterationsByCodeCacheSize, iterationsByCodeCacheSize * testCaseNum);
111 System.out.printf("Number of iterations limited by non-profiled code cache size is %d (%d cases)%n",
112 iterationsByNonProfiledCodeCacheSize, iterationsByNonProfiledCodeCacheSize * testCaseNum);
113 iterations = Math.min(iterationsByCodeCacheSize,
114 Math.min(iterations, iterationsByNonProfiledCodeCacheSize));
115 if (iterations == 0) {
116 System.out.println("Warning: code cache size is too small to provide at"
117 + " least one iteration! Test will try to do one iteration.");
118 iterations = 1;
119 }
120 System.out.printf("Number of iterations is set to %d (%d cases)%n",
121 iterations, iterations * testCaseNum);
122 System.out.flush();
123 for (long i = 0; i < iterations; i++) {
124 System.err.println(String.format("Iteration %d:", i));
125 for (TestMethods testMethod : testMethods) {
126 LambdaFormTestCase testCase = ctor.apply(testMethod);
127 try {
128 System.err.printf("Tested LF caching feature with MethodHandles.%s method.%n",
129 testCase.getTestMethod().name);
130 testCase.doTest();
131 System.err.println("PASSED");
132 } catch (Throwable t) {
133 t.printStackTrace();
134 System.err.println("FAILED");
135 passed = false;
136 failCounter++;
137 }
138 testCounter++;
139 }
140 }
141 if (!passed) {
142 throw new Error(String.format("%d of %d test cases FAILED! %n"
143 + "Rerun the test with the same \"-Dseed=\" option as in the log file!",
144 failCounter, testCounter));
145 } else {
146 System.err.println(String.format("All %d test cases PASSED!", testCounter));
147 }
148 }
149 }