test/hotspot/jtreg/runtime/ErrorHandling/ShowRegistersOnAssertTest.java

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/*
 * @test
 * @bug 8191101
 * @summary Show Registers on assert/guarantee
 * @library /test/lib
 * @requires (vm.debug == true) & (os.family == "linux")
 * @author Thomas Stuefe (SAP)
 * @modules java.base/jdk.internal.misc
 *          java.management
 */

// Note: this test can only run on debug since it relies on VMError::controlled_crash() which
// only exists in debug builds.
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;

public class ShowRegistersOnAssertTest {

    private static void do_test(boolean do_assert, // true - assert, false - guarantee
        boolean suppress_assert,
        boolean show_registers_on_assert) throws Exception
    {
        System.out.println("Testing " + (suppress_assert ? "suppressed" : "normal") + " " + (do_assert ? "assert" : "guarantee") +
                           " with " + (show_registers_on_assert ? "-XX:+ShowRegistersOnAssert" : "-XX:-ShowRegistersOnAssert") + "...");
        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
            "-XX:+UnlockDiagnosticVMOptions", "-Xmx100M", "-XX:-CreateCoredumpOnCrash",
            "-XX:ErrorHandlerTest=" + (do_assert ? "1" : "3"),
            (suppress_assert ? "-XX:SuppressErrorAt=/vmError.cpp" : ""),
            (show_registers_on_assert ? "-XX:+ShowRegistersOnAssert" : "-XX:-ShowRegistersOnAssert"),
            "-version");

        OutputAnalyzer output_detail = new OutputAnalyzer(pb.start());

        if (suppress_assert) {
            // we should have not have crashed. See VMError::controlled_crash().
            output_detail.shouldMatch(".*survived intentional crash.*");
        } else {
            // we should have crashed with an internal error. We should definitly NOT have crashed with a segfault
            // (which would be a sign that the assert poison page mechanism does not work).
            output_detail.shouldMatch("# A fatal error has been detected by the Java Runtime Environment:.*");
            output_detail.shouldMatch("# +Internal Error.*");
        }
    }

    public static void main(String[] args) throws Exception {
        // Note: for now, this is only a regression test testing that the addition of ShowRegistersOnAssert does
        // not break normal assert/guarantee handling. The feature is not implemented on all platforms and really testing
        // it requires more effort.
        do_test(false, false, false);
        do_test(false, false, true);
        do_test(false, true, false);
        do_test(false, true, true);
        do_test(true, false, false);
        do_test(true, false, true);
        do_test(true, true, false);
        do_test(true, true, true);
    }

}