1 /*
2 * Copyright (c) 2017 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 java.io.BufferedReader;
25 import java.io.File;
26 import java.io.FileInputStream;
27 import java.io.InputStreamReader;
28 import java.util.regex.Pattern;
29
30 import jdk.test.lib.process.OutputAnalyzer;
31 import jdk.test.lib.Platform;
32 import jdk.test.lib.process.ProcessTools;
33
34 /*
35 * @test
36 * @bug 8166944
37 * @summary Hanging Error Reporting steps may lead to torn error logs
38 * @modules java.base/jdk.internal.misc
39 * @library /test/lib
40 * @requires (vm.debug == true) & (os.family != "windows")
41 * @author Thomas Stuefe (SAP)
42 */
43
44 public class TimeoutInErrorHandlingTest {
45
46
47 public static void main(String[] args) throws Exception {
48
49 /* Start the VM and let it crash. Specify TestUnresponsiveErrorHandler which will
50 * let five subsequent error reporting steps hang. The Timeout handling triggered
51 * by the WatcherThread should kick in and interrupt those steps. In theory, the
52 * text "timeout occurred during error reporting in step .." (the little timeouts)
53 * should occur in the error log up to four times, followed by the final big timeout
54 * "------ Timeout during error reporting after xx s. ------"
55 *
56 * Note that there are a number of uncertainties which make writing a 100% foolproof
57 * test challenging. The time the error reporting thread takes to react to the
58 * timeout triggers is unknown. So it is difficult to predict how many little timeouts
59 * will be visible before the big timeout kicks in. Also, once the big timeout hits,
60 * error reporting thread and Watcherthread will race. The former writes his last
61 * message to the error logs and flushes, the latter waits 200ms and then exits the
62 * process without further synchronization with the error reporting thread.
63 *
64 * Because of all this and the desire to write a bullet proof test which does
65 * not fail sporadically, we will not test for the final timeout message nor for all
66 * of the optimally expected little timeout messages. We just test for two of the
67 * little timeout messages to see that repeated timeout handling is basically working.
68 */
69
70 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
71 "-XX:+UnlockDiagnosticVMOptions",
72 "-Xmx100M",
73 "-XX:ErrorHandlerTest=14",
74 "-XX:+TestUnresponsiveErrorHandler",
75 "-XX:ErrorLogTimeout=16", // 16 seconds big timeout = 4 seconds per little timeout
76 "-XX:-CreateCoredumpOnCrash",
77 "-version");
78
79 OutputAnalyzer output_detail = new OutputAnalyzer(pb.start());
80
81 // we should have crashed with a SIGSEGV
82 output_detail.shouldMatch("# A fatal error has been detected by the Java Runtime Environment:.*");
83 output_detail.shouldMatch("# +(?:SIGSEGV|EXCEPTION_ACCESS_VIOLATION).*");
84
85 // VM should have been aborted by WatcherThread
86 output_detail.shouldMatch(".*timer expired, abort.*");
87
88 // extract hs-err file
89 String hs_err_file = output_detail.firstMatch("# *(\\S*hs_err_pid\\d+\\.log)", 1);
90 if (hs_err_file == null) {
91 throw new RuntimeException("Did not find hs-err file in output.\n");
92 }
93
94 File f = new File(hs_err_file);
95 if (!f.exists()) {
96 throw new RuntimeException("hs-err file missing at "
97 + f.getAbsolutePath() + ".\n");
98 }
99
100 System.out.println("Found hs_err file. Scanning...");
101
102 FileInputStream fis = new FileInputStream(f);
103 BufferedReader br = new BufferedReader(new InputStreamReader(fis));
104 String line = null;
105
106
107
108 Pattern [] pattern = new Pattern[] {
109 Pattern.compile(".*timeout occurred during error reporting in step.*"),
110 Pattern.compile(".*timeout occurred during error reporting in step.*")
111 };
112 int currentPattern = 0;
113
114 String lastLine = null;
115 while ((line = br.readLine()) != null) {
116 if (currentPattern < pattern.length) {
117 if (pattern[currentPattern].matcher(line).matches()) {
118 System.out.println("Found: " + line + ".");
119 currentPattern ++;
120 }
121 }
122 lastLine = line;
123 }
124 br.close();
125
126 if (currentPattern < pattern.length) {
127 throw new RuntimeException("hs-err file incomplete (first missing pattern: " + currentPattern + ")");
128 }
129
130 System.out.println("OK.");
131
132 }
133
134 }
135