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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 /*
 * @test
 * @library /test/lib /
 * @bug 8356865
 * @key randomness
 * @requires vm.flagless & vm.compiler2.enabled & vm.debug == true
 * @summary Tests that using reasonable values for -XX:FastAllocateSizeLimit does not crash the VM.
 * @run driver compiler.arguments.TestFastAllocateSizeLimit
 */

package compiler.arguments;

import java.io.IOException;
import java.util.Random;

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

public class TestFastAllocateSizeLimit {
    private static final Random RANDOM = Utils.getRandomInstance();

    public static void main(String[] args) throws IOException {
        if (args.length == 0) {
            // range defined in globals.hpp is [0, (1 << (BitsPerInt - LogBytesPerLong - 1)) - 1]
            int sizeLimit = RANDOM.nextInt(1 << 28);
            ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder("-XX:FastAllocateSizeLimit=" +
                sizeLimit, "-Xcomp", "compiler.arguments.TestFastAllocateSizeLimit", "run");
            OutputAnalyzer output = new OutputAnalyzer(pb.start());
            output.shouldHaveExitValue(0);
        } else {
            System.out.println("Test passed.");
        }
    }
}