1 /*
2 * Copyright (c) 2017, 2020, 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 * @run driver TimeoutInErrorHandlingTest
42 * @author Thomas Stuefe (SAP)
43 */
44
45 public class TimeoutInErrorHandlingTest {
46
47 public static final boolean verbose = System.getProperty("verbose") != null;
48 // 16 seconds for hs_err generation timeout = 4 seconds per step timeout
49 public static final int ERROR_LOG_TIMEOUT = 16;
50
51 public static void main(String[] args) throws Exception {
52
53 int error_log_timeout = ERROR_LOG_TIMEOUT;
54 if ("SunOS".equals(System.getProperty("os.name"))) {
55 // Give Solaris machines 3X as much time:
56 error_log_timeout *= 3;
57 }
58
59 /* Start the VM and let it crash. Specify TestUnresponsiveErrorHandler which will
60 * let five subsequent error reporting steps hang. The Timeout handling triggered
61 * by the WatcherThread should kick in and interrupt those steps. In theory, the
62 * text "timeout occurred during error reporting in step .." (the little timeouts)
63 * should occur in the error log up to four times, followed by the final big timeout
64 * "------ Timeout during error reporting after xx s. ------"
65 *
66 * Note that there are a number of uncertainties which make writing a 100% foolproof
67 * test challenging. The time the error reporting thread takes to react to the
68 * timeout triggers is unknown. So it is difficult to predict how many little timeouts
69 * will be visible before the big timeout kicks in. Also, once the big timeout hits,
70 * error reporting thread and Watcherthread will race. The former writes his last
71 * message to the error logs and flushes, the latter waits 200ms and then exits the
72 * process without further synchronization with the error reporting thread.
73 *
74 * Because of all this and the desire to write a bullet proof test which does
75 * not fail sporadically, we will not test for the final timeout message nor for all
76 * of the optimally expected little timeout messages. We just test for two of the
77 * little timeout messages to see that repeated timeout handling is basically working.
78 */
79
80 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
81 "-XX:+UnlockDiagnosticVMOptions",
82 "-Xmx100M",
83 "-XX:ErrorHandlerTest=14",
84 "-XX:+TestUnresponsiveErrorHandler",
85 "-XX:ErrorLogTimeout=" + error_log_timeout,
86 "-XX:-CreateCoredumpOnCrash",
87 "-version");
88
89 OutputAnalyzer output_detail = new OutputAnalyzer(pb.start());
90
91 if (verbose) {
92 System.err.println("<begin cmd output>");
93 System.err.println(output_detail.getOutput());
94 System.err.println("<end cmd output>");
95 }
96
97 // we should have crashed with a SIGSEGV
98 output_detail.shouldMatch("# A fatal error has been detected by the Java Runtime Environment:.*");
99 output_detail.shouldMatch("# +(?:SIGSEGV|SIGBUS|EXCEPTION_ACCESS_VIOLATION).*");
100
101 // VM should have been aborted by WatcherThread
102 output_detail.shouldMatch(".*timer expired, abort.*");
103
104 // extract hs-err file
105 String hs_err_file = output_detail.firstMatch("# *(\\S*hs_err_pid\\d+\\.log)", 1);
106 if (hs_err_file == null) {
107 if (!verbose) {
108 System.err.println("<begin cmd output>");
109 System.err.println(output_detail.getOutput());
110 System.err.println("<end cmd output>");
111 }
112 throw new RuntimeException("Did not find hs-err file in output.\n");
113 }
114
115 File f = new File(hs_err_file);
116 if (!f.exists()) {
117 if (!verbose) {
118 System.err.println("<begin cmd output>");
119 System.err.println(output_detail.getOutput());
120 System.err.println("<end cmd output>");
121 }
122 throw new RuntimeException("hs-err file missing at "
123 + f.getAbsolutePath() + ".\n");
124 }
125
126 System.out.println("Found hs_err file. Scanning...");
127
128 FileInputStream fis = new FileInputStream(f);
129 BufferedReader br = new BufferedReader(new InputStreamReader(fis));
130 String line = null;
131
132
133 Pattern [] pattern = new Pattern[] {
134 Pattern.compile(".*timeout occurred during error reporting in step.*"),
135 Pattern.compile(".*timeout occurred during error reporting in step.*")
136 };
137 int currentPattern = 0;
138
139 String lastLine = null;
140 StringBuilder saved_hs_err = new StringBuilder();
141 while ((line = br.readLine()) != null) {
142 saved_hs_err.append(line + System.lineSeparator());
143 if (currentPattern < pattern.length) {
144 if (pattern[currentPattern].matcher(line).matches()) {
145 System.out.println("Found: " + line + ".");
146 currentPattern ++;
147 }
148 }
149 lastLine = line;
150 }
151 br.close();
152
153 if (verbose) {
154 System.err.println("<begin hs_err contents>");
155 System.err.print(saved_hs_err);
156 System.err.println("<end hs_err contents>");
157 }
158
159 if (currentPattern < pattern.length) {
160 if (!verbose) {
161 System.err.println("<begin hs_err contents>");
162 System.err.print(saved_hs_err);
163 System.err.println("<end hs_err contents>");
164 }
165 throw new RuntimeException("hs-err file incomplete (first missing pattern: " + currentPattern + ")");
166 }
167
168 System.out.println("OK.");
169
170 }
171
172 }