TestOnOutOfMemoryError.java

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/*
 * @test TestOnOutOfMemoryError
 * @summary Test using single and multiple -XX:OnOutOfMemoryError=<cmd>
 * @modules java.base/jdk.internal.misc
 * @library /test/lib
 * @run driver TestOnOutOfMemoryError
 * @bug 8078470 8177522
 */

import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.process.OutputAnalyzer;

public class TestOnOutOfMemoryError {

    public static void main(String[] args) throws Exception {
        if (args.length == 1) {
            // This should guarantee to throw:
            //  java.lang.OutOfMemoryError: Requested array size exceeds VM limit
            Object[] oa = new Object[Integer.MAX_VALUE];
            return;
        }

        // else this is the main test
        String msg1 = "Test1 Succeeded";
        String msg2 = "Test2 Succeeded";
        ProcessBuilder pb_single = ProcessTools.createJavaProcessBuilder(
           "-XX:OnOutOfMemoryError=echo " + msg1,
           TestOnOutOfMemoryError.class.getName(),
           "throwOOME");

        ProcessBuilder pb_multiple = ProcessTools.createJavaProcessBuilder(
           "-XX:OnOutOfMemoryError=echo " + msg1,
           "-XX:OnOutOfMemoryError=echo " + msg2,
           TestOnOutOfMemoryError.class.getName(),
           "throwOOME");

        OutputAnalyzer output_single = new OutputAnalyzer(pb_single.start());

        OutputAnalyzer output_multiple = new OutputAnalyzer(pb_multiple.start());

        /* Actual output should look like this:
           #
           # java.lang.OutOfMemoryError: Requested array size exceeds VM limit
           # -XX:OnOutOfMemoryError="echo Test Succeeded"
           #   Executing /bin/sh -c "echo Test Succeeded"...
           Test Succeeded
           Exception in thread "main" java.lang.OutOfMemoryError: Requested array size exceeds VM limit
           at OOME.main(OOME.java:3)

           So we don't want to match on the "# Executing ..." line, and they
           both get written to stdout.
        */
        output_single.shouldContain("Requested array size exceeds VM limit");
        output_single.stdoutShouldMatch("^" + msg1); // match start of line only

        output_multiple.shouldContain("Requested array size exceeds VM limit");
        output_multiple.stdoutShouldMatch("^" + msg1); // match start of line only
        output_multiple.stdoutShouldMatch("^" + msg2); // match start of line only

        System.out.println("PASSED");
    }
}