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 *

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 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

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 * 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.

 *

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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 Nested ThreadsListHandle info should be in error handling output.

 * @modules java.base/jdk.internal.misc

 * @library /test/lib

 * @run main/othervm -XX:+UnlockDiagnosticVMOptions -XX:+EnableThreadSMRStatistics NestedThreadsListHandleInErrorHandlingTest

 */

/*

 * This test was created using SafeFetchInErrorHandlingTest.java

 * as a guide.

 */

public class NestedThreadsListHandleInErrorHandlingTest {

  public static void main(String[] args) throws Exception {

    // The -XX:ErrorHandlerTest=N option requires debug bits.

    ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(

        "-XX:+UnlockDiagnosticVMOptions",

        "-Xmx100M",

        "-XX:ErrorHandlerTest=17",

        "-XX:-CreateCoredumpOnCrash",

        "-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 a nested 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

        // a nested hazard ptr:

        // We should have a section of Threads class SMR info:

        Pattern.compile("Threads class SMR info:"),

        // We should have one nested ThreadsListHandle:

        Pattern.compile(".*, _nested_thread_list_max=1"),

        // The current thread (marked with '=>') in the threads list

    };

    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.");

  }

}