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/**

 * @test

 * @bug 8159262

 * @summary layers over the boot layer are repeatedly created, during this iteration, GCs are forced to verify correct walk of module and package lists.

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

 * @library /test/lib

 * @compile ../CompilerUtils.java

 * @run main/othervm ModuleStressGC

 */

import java.nio.file.Path;

import java.nio.file.Paths;

import jdk.test.lib.process.ProcessTools;

import jdk.test.lib.process.OutputAnalyzer;

public class ModuleStressGC {

    private static final String TEST_SRC = System.getProperty("test.src");

    private static final String TEST_CLASSES = System.getProperty("test.classes");

    private static final Path SRC_DIR = Paths.get(TEST_SRC, "src");

    private static final Path MODS_DIR = Paths.get(TEST_CLASSES, "mods");

    /**

     * Compile two module definitions used by the test, jdk.test and jdk.translet.

     */

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

        boolean compiled;

        // Compile module jdk.test declaration

        compiled = CompilerUtils.compile(

            SRC_DIR.resolve("jdk.test"),

            MODS_DIR.resolve("jdk.test"));

        if (!compiled) {

            throw new RuntimeException("Test failed to compile module jdk.test");

        }

        // Compile module jdk.translet declaration

        compiled = CompilerUtils.compile(

            SRC_DIR.resolve("jdk.translet"),

            MODS_DIR.resolve("jdk.translet"),

            "--add-exports=jdk.test/test=jdk.translet",

            "-p", MODS_DIR.toString());

        if (!compiled) {

            throw new RuntimeException("Test failed to compile module jdk.translet");

        }

        // Sanity check that the test, jdk.test/test/MainGC.java,

        // correctly walks module jdk.test's reads list and package

        // test's, defined to module jdk.translet, export list at

        // GC safepoints.

        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(

            "-p", MODS_DIR.toString(),

            "-m", "jdk.test/test.MainGC");

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

        oa.shouldContain("package test defined in module jdk.test, exports list being walked")

          .shouldContain("module jdk.test reads list being walked")

          .shouldHaveExitValue(0);

    }

}