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/*
* Copyright (c) 2017, 2023, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.util.regex.Pattern;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.Platform;
import jdk.test.lib.process.ProcessTools;
/*
* @test
* @requires (vm.debug == true)
* @bug 8167108
* @summary ThreadsListHandle info should be in error handling output.
* @modules java.base/jdk.internal.misc
* @library /test/lib
* @requires vm.flagless
* @run driver ThreadsListHandleInErrorHandlingTest
*/
/*
* This test was created using SafeFetchInErrorHandlingTest.java
* as a guide.
*/
public class ThreadsListHandleInErrorHandlingTest {
public static void main(String[] args) throws Exception {
// The -XX:ErrorHandlerTest=N option requires debug bits.
// Need to disable ShowRegistersOnAssert: that flag causes registers to be shown, which calls os::print_location,
// which - as part of its checks - will iterate the threads list under a ThreadListHandle, changing the max nesting
// counters and confusing this test.
ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(
"-XX:+UnlockDiagnosticVMOptions",
"-XX:+EnableThreadSMRStatistics",
"-Xmx100M",
"-XX:ErrorHandlerTest=16",
"-XX:-CreateCoredumpOnCrash",
"-XX:-ShowRegistersOnAssert",
"-version");
OutputAnalyzer output_detail = new OutputAnalyzer(pb.start());
// We should have crashed with a specific fatal error:
output_detail.shouldMatch("# A fatal error has been detected by the Java Runtime Environment:.*");
System.out.println("Found fatal error header.");
output_detail.shouldMatch("# +fatal error: Force crash with an active ThreadsListHandle.");
System.out.println("Found specific fatal error.");
// Extract hs_err_pid file.
String hs_err_file = output_detail.firstMatch("# *(\\S*hs_err_pid\\d+\\.log)", 1);
if (hs_err_file == null) {
throw new RuntimeException("Did not find hs_err_pid file in output.\n");
}
File f = new File(hs_err_file);
if (!f.exists()) {
throw new RuntimeException("hs_err_pid file missing at "
+ f.getAbsolutePath() + ".\n");
}
System.out.println("Found hs_err_pid file. Scanning...");
FileInputStream fis = new FileInputStream(f);
BufferedReader br = new BufferedReader(new InputStreamReader(fis));
String line = null;
Pattern [] pattern = new Pattern[] {
// The "Current thread" line should show a hazard ptr
// and no nested hazard ptrs:
Pattern.compile("Current thread .* _threads_hazard_ptr=0x[0-9A-Fa-f][0-9A-Fa-f]*, _nested_threads_hazard_ptr_cnt=0.*"),
// We should have a section of Threads class SMR info:
Pattern.compile("Threads class SMR info:"),
// We should have had a single nested ThreadsListHandle since
// ThreadsSMRSupport::print_info_on() now protects itself with
// a ThreadsListHandle:
Pattern.compile(".*, _nested_thread_list_max=1"),
// The current thread (marked with '=>') in the threads list
// should show no nested hazard ptrs:
Pattern.compile("=>.* JavaThread \"main\" .*, _nested_threads_hazard_ptr_cnt=0.*"),
};
int currentPattern = 0;
String lastLine = null;
while ((line = br.readLine()) != null) {
if (currentPattern < pattern.length) {
if (pattern[currentPattern].matcher(line).matches()) {
System.out.println("Found: " + line + ".");
currentPattern++;
}
}
lastLine = line;
}
br.close();
if (currentPattern < pattern.length) {
throw new RuntimeException("hs_err_pid file incomplete (first missing pattern: " + currentPattern + ")");
}
if (!lastLine.equals("END.")) {
throw new RuntimeException("hs-err file incomplete (missing END marker.)");
} else {
System.out.println("End marker found.");
}
System.out.println("Done scanning hs_err_pid_file.");
System.out.println("PASSED.");
}
}
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