1 /*
2  * Copyright (c) 2017, 2018, 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  * @requires (vm.debug == true)
37  * @bug 8167108
38  * @summary Nested ThreadsListHandle info should be in error handling output.
39  * @modules java.base/jdk.internal.misc
40  * @library /test/lib
41  * @run main/othervm -XX:+UnlockDiagnosticVMOptions -XX:+EnableThreadSMRStatistics NestedThreadsListHandleInErrorHandlingTest
42  */
43 
44 /*
45  * This test was created using SafeFetchInErrorHandlingTest.java
46  * as a guide.
47  */
48 public class NestedThreadsListHandleInErrorHandlingTest {
main(String[] args)49   public static void main(String[] args) throws Exception {
50 
51     // The -XX:ErrorHandlerTest=N option requires debug bits.
52     ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
53         "-XX:+UnlockDiagnosticVMOptions",
54         "-Xmx100M",
55         "-XX:ErrorHandlerTest=17",
56         "-XX:-CreateCoredumpOnCrash",
57         "-version");
58 
59     OutputAnalyzer output_detail = new OutputAnalyzer(pb.start());
60 
61     // We should have crashed with a specific fatal error:
62     output_detail.shouldMatch("# A fatal error has been detected by the Java Runtime Environment:.*");
63     System.out.println("Found fatal error header.");
64     output_detail.shouldMatch("# +fatal error: Force crash with a nested ThreadsListHandle.");
65     System.out.println("Found specific fatal error.");
66 
67     // Extract hs_err_pid file.
68     String hs_err_file = output_detail.firstMatch("# *(\\S*hs_err_pid\\d+\\.log)", 1);
69     if (hs_err_file == null) {
70         throw new RuntimeException("Did not find hs_err_pid file in output.\n");
71     }
72 
73     File f = new File(hs_err_file);
74     if (!f.exists()) {
75         throw new RuntimeException("hs_err_pid file missing at "
76                                    + f.getAbsolutePath() + ".\n");
77     }
78 
79     System.out.println("Found hs_err_pid file. Scanning...");
80 
81     FileInputStream fis = new FileInputStream(f);
82     BufferedReader br = new BufferedReader(new InputStreamReader(fis));
83     String line = null;
84 
85     Pattern [] pattern = new Pattern[] {
86         // The "Current thread" line should show a hazard ptr and
87         // a nested hazard ptr:
88         Pattern.compile("Current thread .* _threads_hazard_ptr=0x[0-9A-Fa-f][0-9A-Fa-f]*, _nested_threads_hazard_ptr_cnt=1, _nested_threads_hazard_ptr=0x[0-9A-Fa-f][0-9A-Fa-f]*.*"),
89         // We should have a section of Threads class SMR info:
90         Pattern.compile("Threads class SMR info:"),
91         // We should have one nested ThreadsListHandle:
92         Pattern.compile(".*, _nested_thread_list_max=1"),
93         // The current thread (marked with '=>') in the threads list
94         // should show a hazard ptr and a nested hazard ptr:
95         Pattern.compile("=>.* JavaThread \"main\" .* _threads_hazard_ptr=0x[0-9A-Fa-f][0-9A-Fa-f]*, _nested_threads_hazard_ptr_cnt=1, _nested_threads_hazard_ptr=0x[0-9A-Fa-f][0-9A-Fa-f]*.*"),
96     };
97     int currentPattern = 0;
98 
99     String lastLine = null;
100     while ((line = br.readLine()) != null) {
101         if (currentPattern < pattern.length) {
102             if (pattern[currentPattern].matcher(line).matches()) {
103                 System.out.println("Found: " + line + ".");
104                 currentPattern++;
105             }
106         }
107         lastLine = line;
108     }
109     br.close();
110 
111     if (currentPattern < pattern.length) {
112         throw new RuntimeException("hs_err_pid file incomplete (first missing pattern: " +  currentPattern + ")");
113     }
114 
115     if (!lastLine.equals("END.")) {
116         throw new RuntimeException("hs-err file incomplete (missing END marker.)");
117     } else {
118         System.out.println("End marker found.");
119     }
120 
121     System.out.println("Done scanning hs_err_pid_file.");
122     System.out.println("PASSED.");
123   }
124 }
125