test/hotspot/jtreg/runtime/Safepoint/TestAbortVMOnSafepointTimeout.java

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import jdk.test.lib.*;
import jdk.test.lib.process.*;

/*
 * @test TestAbortVMOnSafepointTimeout
 * @summary Check if VM can kill thread which doesn't reach safepoint.
 * @bug 8219584 8227528
 * @requires vm.compiler2.enabled
 * @library /test/lib
 * @modules java.base/jdk.internal.misc
 *          java.management
 */

public class TestAbortVMOnSafepointTimeout {

    public static void main(String[] args) throws Exception {
        if (args.length > 0) {
            int result = test_loop(3);
            System.out.println("This message would occur after some time with result " + result);
            return;
        }

        testWith(500, 500);
    }

    static int test_loop(int x) {
        int sum = 0;
        if (x != 0) {
            // Long running loop without safepoint.
            for (int y = 1; y < Integer.MAX_VALUE; ++y) {
                if (y % x == 0) ++sum;
            }
        }
        return sum;
    }

    public static void testWith(int sfpt_interval, int timeout_delay) throws Exception {
        // -XX:-UseCountedLoopSafepoints - is used to prevent the loop
        // in test_loop() to poll for safepoints.
        // -XX:LoopStripMiningIter=0 and -XX:LoopUnrollLimit=0 - are
        // used to prevent optimizations over the loop in test_loop()
        // since we actually want it to provoke a safepoint timeout.
        // -XX:-UseBiasedLocking - is used to prevent biased locking
        // handshakes from changing the timing of this test.
        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
                "-XX:+UnlockDiagnosticVMOptions",
                "-XX:-UseBiasedLocking",
                "-XX:+SafepointTimeout",
                "-XX:+SafepointALot",
                "-XX:+AbortVMOnSafepointTimeout",
                "-XX:SafepointTimeoutDelay=" + timeout_delay,
                "-XX:GuaranteedSafepointInterval=" + sfpt_interval,
                "-XX:-TieredCompilation",
                "-XX:-UseCountedLoopSafepoints",
                "-XX:LoopStripMiningIter=0",
                "-XX:LoopUnrollLimit=0",
                "-XX:CompileCommand=compileonly,TestAbortVMOnSafepointTimeout::test_loop",
                "-Xcomp",
                "-XX:-CreateCoredumpOnCrash",
                "-Xms64m",
                "TestAbortVMOnSafepointTimeout",
                "runTestLoop"
        );

        OutputAnalyzer output = new OutputAnalyzer(pb.start());
        if (Platform.isWindows()) {
            output.shouldMatch("Safepoint sync time longer than");
        } else {
            output.shouldMatch("SIGILL");
            if (Platform.isLinux()) {
                output.shouldMatch("(sent by kill)");
            }
            output.shouldMatch("TestAbortVMOnSafepointTimeout.test_loop");
        }
        output.shouldNotHaveExitValue(0);
    }
}