TestRedefineWithUnresolvedClass.java

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/*
 * @test
 * @summary Redefine a class with an UnresolvedClass reference in the constant pool.
 * @bug 8035150
 * @requires vm.jvmti
 * @library /test/lib
 * @modules java.base/jdk.internal.misc
 *          java.compiler
 *          java.instrument
 *          java.management
 *          jdk.jartool/sun.tools.jar
 *          jdk.internal.jvmstat/sun.jvmstat.monitor
 * @build UnresolvedClassAgent
 * @run main TestRedefineWithUnresolvedClass
 */

import java.io.File;
import java.util.Arrays;

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

public class TestRedefineWithUnresolvedClass {

    final static String slash = File.separator;
    final static String testClasses = System.getProperty("test.classes") + slash;

    public static void main(String... args) throws Throwable {
        // delete this class to cause a NoClassDefFoundError
        File unresolved = new File(testClasses, "MyUnresolvedClass.class");
        if (unresolved.exists() && !unresolved.delete()) {
            throw new Exception("Could not delete: " + unresolved);
        }

        // build the javaagent
        buildJar("UnresolvedClassAgent");

        // launch a VM with the javaagent
        launchTest();
    }

    private static void buildJar(String jarName) throws Throwable {
        String testSrc = System.getProperty("test.src", "?") + slash;

        String jarPath = String.format("%s%s.jar", testClasses, jarName);
        String manifestPath = String.format("%s%s.mf", testSrc, jarName);
        String className = String.format("%s.class", jarName);

        String[] args = new String[] {"-cfm", jarPath, manifestPath, "-C", testClasses, className};

        System.out.println("Running jar " + Arrays.toString(args));
        sun.tools.jar.Main jarTool = new sun.tools.jar.Main(System.out, System.err, "jar");
        if (!jarTool.run(args)) {
            throw new Exception("jar failed: args=" + Arrays.toString(args));
        }
    }

    private static void launchTest() throws Throwable {
        OutputAnalyzer output = ProcessTools.executeTestJvm(
            "-javaagent:" + testClasses + "UnresolvedClassAgent.jar",
            "-Dtest.classes=" + testClasses,
            "UnresolvedClassAgent");
        output.shouldHaveExitValue(0);
    }
}