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  * @requires (vm.debug == true)
  37  * @bug 8167108
  38  * @summary 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 ThreadsListHandleInErrorHandlingTest
  42  */
  43 
  44 /*
  45  * This test was created using SafeFetchInErrorHandlingTest.java
  46  * as a guide.
  47  */
  48 public class ThreadsListHandleInErrorHandlingTest {
  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=16",
  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 an active 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:
  87         Pattern.compile("Current thread .* _threads_hazard_ptr=0x.*"),
  88         // We should have a section of Threads class SMR info:
  89         Pattern.compile("Threads class SMR info:"),
  90         // The current thread (marked with '=>') in the threads list
  91         // should show a hazard ptr:
  92         Pattern.compile("=>.* JavaThread \"main\" .*_threads_hazard_ptr=0x.*"),
  93     };
  94     int currentPattern = 0;
  95 
  96     String lastLine = null;
  97     while ((line = br.readLine()) != null) {
  98         if (currentPattern < pattern.length) {
  99             if (pattern[currentPattern].matcher(line).matches()) {
 100                 System.out.println("Found: " + line + ".");
 101                 currentPattern++;
 102             }
 103         }
 104         lastLine = line;
 105     }
 106     br.close();
 107 
 108     if (currentPattern < pattern.length) {
 109         throw new RuntimeException("hs_err_pid file incomplete (first missing pattern: " +  currentPattern + ")");
 110     }
 111 
 112     if (!lastLine.equals("END.")) {
 113         throw new RuntimeException("hs-err file incomplete (missing END marker.)");
 114     } else {
 115         System.out.println("End marker found.");
 116     }
 117 
 118     System.out.println("Done scanning hs_err_pid_file.");
 119     System.out.println("PASSED.");
 120   }
 121 }