Thu, 07 Mar 2013 10:04:28 +0000
8009138: javac, equals-hashCode warning tuning
Reviewed-by: mcimadamore
1 /*
2 * Copyright (c) 2010, 2013, 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 */
24 import java.io.PrintWriter;
25 import java.io.StringWriter;
26 import java.util.concurrent.ExecutorService;
27 import java.util.concurrent.Executors;
28 import java.util.concurrent.ThreadFactory;
29 import java.util.concurrent.TimeUnit;
30 import java.util.concurrent.atomic.AtomicInteger;
31 import javax.tools.JavaCompiler;
32 import javax.tools.StandardJavaFileManager;
33 import javax.tools.ToolProvider;
35 /**
36 * An abstract superclass for threaded tests.
37 *
38 * This class will try to read a property named test.concurrency.
39 * The property can be provided by passing this option to jtreg:
40 * -javaoption:-Dtest.concurrency=#
41 *
42 * If the property is not set the class will use a heuristic to determine the
43 * maximum number of threads that can be fired to execute a given test.
44 *
45 * This code will have to be revisited if jprt starts using concurrency for
46 * for running jtreg tests.
47 */
48 public abstract class JavacTestingAbstractThreadedTest {
50 protected static AtomicInteger numberOfThreads = new AtomicInteger();
52 protected static int getThreadPoolSize() {
53 Integer testConc = Integer.getInteger("test.concurrency");
54 if (testConc != null) return testConc;
55 int cores = Runtime.getRuntime().availableProcessors();
56 numberOfThreads.set(Math.max(2, Math.min(8, cores / 2)));
57 return numberOfThreads.get();
58 }
60 protected static void checkAfterExec() throws InterruptedException {
61 checkAfterExec(true);
62 };
64 protected static boolean throwAssertionOnError = true;
66 protected static boolean printAll = false;
68 protected static StringWriter errSWriter = new StringWriter();
69 protected static PrintWriter errWriter = new PrintWriter(errSWriter);
71 protected static StringWriter outSWriter = new StringWriter();
72 protected static PrintWriter outWriter = new PrintWriter(outSWriter);
74 protected static void checkAfterExec(boolean printCheckCount)
75 throws InterruptedException {
76 pool.shutdown();
77 pool.awaitTermination(15, TimeUnit.MINUTES);
78 if (errCount.get() > 0) {
79 if (throwAssertionOnError) {
80 closePrinters();
81 System.err.println(errSWriter.toString());
82 throw new AssertionError(
83 String.format("%d errors found", errCount.get()));
84 } else {
85 System.err.println(
86 String.format("%d errors found", errCount.get()));
87 }
88 } else if (printCheckCount) {
89 outWriter.println("Total check executed: " + checkCount.get());
90 }
91 /*
92 * This output is for supporting debugging. It does not mean that a given
93 * test had executed that number of threads concurrently. The value printed
94 * here is the maximum possible amount.
95 */
96 closePrinters();
97 if (printAll) {
98 System.out.println(errSWriter.toString());
99 System.out.println(outSWriter.toString());
100 }
101 System.out.println("Total number of threads in thread pool: " +
102 numberOfThreads.get());
103 }
105 protected static void closePrinters() {
106 errWriter.close();
107 outWriter.close();
108 }
110 protected static void processException(Throwable t) {
111 errCount.incrementAndGet();
112 t.printStackTrace(errWriter);
113 pool.shutdown();
114 }
116 //number of checks executed
117 protected static AtomicInteger checkCount = new AtomicInteger();
119 //number of errors found while running combo tests
120 protected static AtomicInteger errCount = new AtomicInteger();
122 //create default shared JavaCompiler - reused across multiple compilations
123 protected static JavaCompiler comp = ToolProvider.getSystemJavaCompiler();
125 protected static ExecutorService pool = Executors.newFixedThreadPool(
126 getThreadPoolSize(), new ThreadFactory() {
127 @Override
128 public Thread newThread(Runnable r) {
129 Thread t = new Thread(r);
130 t.setUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {
131 @Override
132 public void uncaughtException(Thread t, Throwable e) {
133 pool.shutdown();
134 errCount.incrementAndGet();
135 e.printStackTrace(System.err);
136 }
137 });
138 return t;
139 }
140 });
142 /*
143 * File manager is not thread-safe so it cannot be re-used across multiple
144 * threads. However we cache per-thread FileManager to avoid excessive
145 * object creation
146 */
147 protected static final ThreadLocal<StandardJavaFileManager> fm =
148 new ThreadLocal<StandardJavaFileManager>() {
149 @Override protected StandardJavaFileManager initialValue() {
150 return comp.getStandardFileManager(null, null, null);
151 }
152 };
154 }