1 /* 2 * Copyright (c) 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 25 /* 26 * @test 27 * @bug 8191101 28 * @summary Show Registers on assert/guarantee 29 * @library /test/lib 30 * @requires (vm.debug == true) & (os.family == "linux") 31 * @author Thomas Stuefe (SAP) 32 * @modules java.base/jdk.internal.misc 33 * java.management 34 */ 35 36 // Note: this test can only run on debug since it relies on VMError::controlled_crash() which 37 // only exists in debug builds. 38 import java.io.BufferedReader; 39 import java.io.File; 40 import java.io.FileInputStream; 41 import java.io.InputStreamReader; 42 import java.util.regex.Pattern; 43 44 import jdk.test.lib.process.OutputAnalyzer; 45 import jdk.test.lib.Platform; 46 import jdk.test.lib.process.ProcessTools; 47 48 public class ShowRegistersOnAssertTest { 49 50 private static void do_test(boolean do_assert, // true - assert, false - guarantee 51 boolean suppress_assert, 52 boolean show_registers_on_assert) throws Exception 53 { 54 System.out.println("Testing " + (suppress_assert ? "suppressed" : "normal") + " " + (do_assert ? "assert" : "guarantee") + 55 " with " + (show_registers_on_assert ? "-XX:+ShowRegistersOnAssert" : "-XX:-ShowRegistersOnAssert") + "..."); 56 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 57 "-XX:+UnlockDiagnosticVMOptions", "-Xmx100M", "-XX:-CreateCoredumpOnCrash", 58 "-XX:ErrorHandlerTest=" + (do_assert ? "1" : "3"), 59 (suppress_assert ? "-XX:SuppressErrorAt=/vmError.cpp" : ""), 60 (show_registers_on_assert ? "-XX:+ShowRegistersOnAssert" : "-XX:-ShowRegistersOnAssert"), 61 "-version"); 62 63 OutputAnalyzer output_detail = new OutputAnalyzer(pb.start()); 64 65 if (suppress_assert) { 66 // we should have not have crashed. See VMError::controlled_crash(). 67 output_detail.shouldMatch(".*survived intentional crash.*"); 68 } else { 69 // we should have crashed with an internal error. We should definitly NOT have crashed with a segfault 70 // (which would be a sign that the assert poison page mechanism does not work). 71 output_detail.shouldMatch("# A fatal error has been detected by the Java Runtime Environment:.*"); 72 output_detail.shouldMatch("# +Internal Error.*"); 73 } 74 } 75 76 public static void main(String[] args) throws Exception { 77 // Note: for now, this is only a regression test testing that the addition of ShowRegistersOnAssert does 78 // not break normal assert/guarantee handling. The feature is not implemented on all platforms and really testing 79 // it requires more effort. 80 do_test(false, false, false); 81 do_test(false, false, true); 82 do_test(false, true, false); 83 do_test(false, true, true); 84 do_test(true, false, false); 85 do_test(true, false, true); 86 do_test(true, true, false); 87 do_test(true, true, true); 88 } 89 90 } 91