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 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 // Need to disable ShowRegistersOnAssert: that flag causes registers to be shown, which calls os::print_location, 53 // which - as part of its checks - will iterate the threads list under a ThreadListHandle, changing the max nesting 54 // counters and confusing this test. 55 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 56 "-XX:+UnlockDiagnosticVMOptions", 57 "-Xmx100M", 58 "-XX:ErrorHandlerTest=16", 59 "-XX:-CreateCoredumpOnCrash", 60 "-XX:-ShowRegistersOnAssert", 61 "-version"); 62 63 OutputAnalyzer output_detail = new OutputAnalyzer(pb.start()); 64 65 // We should have crashed with a specific fatal error: 66 output_detail.shouldMatch("# A fatal error has been detected by the Java Runtime Environment:.*"); 67 System.out.println("Found fatal error header."); 68 output_detail.shouldMatch("# +fatal error: Force crash with an active ThreadsListHandle."); 69 System.out.println("Found specific fatal error."); 70 71 // Extract hs_err_pid file. 72 String hs_err_file = output_detail.firstMatch("# *(\\S*hs_err_pid\\d+\\.log)", 1); 73 if (hs_err_file == null) { 74 throw new RuntimeException("Did not find hs_err_pid file in output.\n"); 75 } 76 77 File f = new File(hs_err_file); 78 if (!f.exists()) { 79 throw new RuntimeException("hs_err_pid file missing at " 80 + f.getAbsolutePath() + ".\n"); 81 } 82 83 System.out.println("Found hs_err_pid file. Scanning..."); 84 85 FileInputStream fis = new FileInputStream(f); 86 BufferedReader br = new BufferedReader(new InputStreamReader(fis)); 87 String line = null; 88 89 Pattern [] pattern = new Pattern[] { 90 // The "Current thread" line should show a hazard ptr 91 // and no nested hazard ptrs: 92 Pattern.compile("Current thread .* _threads_hazard_ptr=0x[0-9A-Fa-f][0-9A-Fa-f]*, _nested_threads_hazard_ptr_cnt=0.*"), 93 // We should have a section of Threads class SMR info: 94 Pattern.compile("Threads class SMR info:"), 95 // The current thread (marked with '=>') in the threads list 96 // should show a hazard ptr and no nested hazard ptrs: 97 Pattern.compile("=>.* JavaThread \"main\" .* _threads_hazard_ptr=0x[0-9A-Fa-f][0-9A-Fa-f]*, _nested_threads_hazard_ptr_cnt=0.*"), 98 }; 99 int currentPattern = 0; 100 101 String lastLine = null; 102 while ((line = br.readLine()) != null) { 103 if (currentPattern < pattern.length) { 104 if (pattern[currentPattern].matcher(line).matches()) { 105 System.out.println("Found: " + line + "."); 106 currentPattern++; 107 } 108 } 109 lastLine = line; 110 } 111 br.close(); 112 113 if (currentPattern < pattern.length) { 114 throw new RuntimeException("hs_err_pid file incomplete (first missing pattern: " + currentPattern + ")"); 115 } 116 117 if (!lastLine.equals("END.")) { 118 throw new RuntimeException("hs-err file incomplete (missing END marker.)"); 119 } else { 120 System.out.println("End marker found."); 121 } 122 123 System.out.println("Done scanning hs_err_pid_file."); 124 System.out.println("PASSED."); 125 } 126 }