Java Code Examples for jdk.test.lib.compiler.InMemoryJavaCompiler#compile()

public static void main(String args[]) throws Exception {
    Unsafe unsafe = Unsafe.getUnsafe();

    // The anonymous class calls defineAnonymousClass creating a nested anonymous class.
    byte klassbuf2[] = InMemoryJavaCompiler.compile("p.TestClass2",
        "package p; " +
        "import jdk.internal.misc.Unsafe; " +
        "public class TestClass2 { " +
        "    public static void doit() throws Throwable { " +
        "        Unsafe unsafe = jdk.internal.misc.Unsafe.getUnsafe(); " +
        "        Class klass2 = unsafe.defineAnonymousClass(TestClass2.class, p.NestedUnsafe.klassbuf, new Object[0]); " +
        "        unsafe.ensureClassInitialized(klass2); " +
        "        Class[] dArgs = new Class[2]; " +
        "        dArgs[0] = String.class; " +
        "        dArgs[1] = String.class; " +
        "        try { " +
        "            klass2.getMethod(\"concat\", dArgs).invoke(null, \"CC\", \"DD\"); " +
        "        } catch (Throwable ex) { " +
        "            throw new RuntimeException(\"Exception: \" + ex.toString()); " +
        "        } " +
        "} } ",
        "--add-exports=java.base/jdk.internal.misc=ALL-UNNAMED");

    Class klass2 = unsafe.defineAnonymousClass(p.NestedUnsafe.class, klassbuf2, new Object[0]);
    try {
        klass2.getMethod("doit").invoke(null);
        throw new RuntimeException("Expected exception not thrown");
    } catch (Throwable ex) {
        Throwable iae = ex.getCause();
        if (!iae.toString().contains(
            "IllegalArgumentException: Host class p/NestedUnsafe and anonymous class q/TestClass")) {
            throw new RuntimeException("Exception: " + iae.toString());
        }
    }
}
 

public static void main(String args[]) throws Exception {
    Unsafe unsafe = Unsafe.getUnsafe();

    // The anonymous class calls defineAnonymousClass creating a nested anonymous class.
    byte klassbuf2[] = InMemoryJavaCompiler.compile("TestClass2",
        "import jdk.internal.misc.Unsafe; " +
        "public class TestClass2 { " +
        "    public static void doit() throws Throwable { " +
        "        Unsafe unsafe = jdk.internal.misc.Unsafe.getUnsafe(); " +
        "        Class klass2 = unsafe.defineAnonymousClass(TestClass2.class, p.NestedUnsafe2.klassbuf, new Object[0]); " +
        "        unsafe.ensureClassInitialized(klass2); " +
        "        Class[] dArgs = new Class[2]; " +
        "        dArgs[0] = String.class; " +
        "        dArgs[1] = String.class; " +
        "        try { " +
        "            klass2.getMethod(\"concat\", dArgs).invoke(null, \"CC\", \"DD\"); " +
        "        } catch (Throwable ex) { " +
        "            throw new RuntimeException(\"Exception: \" + ex.toString()); " +
        "        } " +
        "} } ",
        "--add-exports=java.base/jdk.internal.misc=ALL-UNNAMED");

    Class klass2 = unsafe.defineAnonymousClass(p.NestedUnsafe2.class, klassbuf2, new Object[0]);
    try {
        klass2.getMethod("doit").invoke(null);
        throw new RuntimeException("Expected exception not thrown");
    } catch (Throwable ex) {
        Throwable iae = ex.getCause();
        if (!iae.toString().contains(
            "IllegalArgumentException: Host class p/NestedUnsafe2 and anonymous class q/TestClass")) {
            throw new RuntimeException("Exception: " + iae.toString());
        }
    }
}
 

private static Class<?> compileAndLoad(String name, String source) throws Exception {
    byte[] byteCode = InMemoryJavaCompiler.compile(name, source);
    return ByteCodeLoader.load(name, byteCode);
}
 

public static void main(String args[]) throws Throwable {
    if (args.length == 0 || !args[0].equals("do_tests")) {

        // Create a package found via -Xbootclasspath/a
        String source = "package BootLdr_package; " +
                        "public class BootLdrPkg { " +
                        "    public int mth() { return 4; } " +
                        "}";
        byte[] klassbuf =
            InMemoryJavaCompiler.compile("BootLdr_package.BootLdrPkg", source);
        ClassFileInstaller.writeClassToDisk("BootLdr_package/BootLdrPkg", klassbuf, "bl_dir");

        // Create a package found via -cp.
        source = "package GetSysPkg_package; " +
                 "public class GetSysClass { " +
                 "    public int mth() { return 4; } " +
                 "}";
        klassbuf =
            InMemoryJavaCompiler.compile("GetSysPkg_package.GetSysClass", source);
        ClassFileInstaller.writeClassToDisk("GetSysPkg_package/GetSysClass", klassbuf);

        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-Xbootclasspath/a:bl_dir",
            "--add-opens=java.base/jdk.internal.loader=ALL-UNNAMED", "-cp", "." + File.pathSeparator +
            System.getProperty("test.classes"), "GetSysPkgTest", "do_tests");
        OutputAnalyzer output = new OutputAnalyzer(pb.start());
        output.shouldHaveExitValue(0);
        return;
    }

    getPkg("java/lang", "jrt:/java.base");
    getPkg("javax/script", null);          // Package not defined

    // Test a package that does not yet have any referenced classes.
    // Note: if another class in com/sun/crypto/provider/ happens to get
    //       loaded or if class PrivateKeyInfo disappears from this package
    //       then this test will fail.
    getPkg("com/sun/crypto/provider", null);
    // Now make sure a class in the package is referenced.
    Class newClass = Class.forName("com.sun.crypto.provider.PrivateKeyInfo");
    getPkg("com/sun/crypto/provider", "jrt:/java.base");

    getPkg("java/nio/charset", "jrt:/java.base");

    // Test a package in a module not owned by boot loader.
    Class clss = Class.forName("jdk.nio.zipfs.ZipPath");
    if (clss == null)
        throw new RuntimeException("Could not find class jdk.nio.zipfs.ZipPath");
    getPkg("javax/activation", null);       // Not owned by boot loader

    // Test a package not in jimage file.
    clss = Class.forName("GetSysPkg_package.GetSysClass");
    if (clss == null)
        throw new RuntimeException("Could not find class GetSysPkg_package.GetSysClass");
    getPkg("GetSysPkg_package", null);

    // Access a class with a package in a boot loader module other than java.base
    clss = Class.forName("java.awt.Button");
    if (clss == null)
        throw new RuntimeException("Could not find class java.awt.Button");
    getPkg("java/awt", "jrt:/java.desktop");

    // Test getting the package location from a class found via -Xbootclasspath/a
    clss = Class.forName("BootLdr_package.BootLdrPkg");
    if (clss == null)
        throw new RuntimeException("Could not find class BootLdr_package.BootLdrPkg");
    String bootldrPkg = (String)invoke(findMethod("getSystemPackageLocation"), null, "BootLdr_package");
    if (bootldrPkg == null) {
        throw new RuntimeException("Expected BootLdr_package to return non-null value");
    }
    if (!bootldrPkg.equals("bl_dir")) {
        throw new RuntimeException("Expected BootLdr_package to return bl_dir, got: " + bootldrPkg);
    }

    // Test when package's class reference is an array.
    // Note: if another class in javax/crypto happens to get loaded
    //       or if class AEADBadTagException disappears from this package
    //       then this test will fail.
    getPkg("javax/crypto", null);
    javax.crypto.AEADBadTagException[] blah = new javax.crypto.AEADBadTagException[3];
    getPkg("javax/crypto", "jrt:/java.base");

}
 

/**
 * Redefine a class
 *
 * @param clazz Class to redefine
 * @param javacode String with the new java code for the class to be redefined
 */
public static void redefineClass(Class clazz, String javacode) throws Exception {
    byte[] bytecode = InMemoryJavaCompiler.compile(clazz.getName(), javacode);
    redefineClass(clazz, bytecode);
}
 

/**
 * Redefine a class
 *
 * @param clazz Class to redefine
 * @param javacode String with the new java code for the class to be redefined
 */
public static void redefineClass(Class clazz, String javacode) throws Exception {
    byte[] bytecode = InMemoryJavaCompiler.compile(clazz.getName(), javacode);
    redefineClass(clazz, bytecode);
}
 

/**
 * Redefine a class
 *
 * @param clazz Class to redefine
 * @param javacode String with the new java code for the class to be redefined
 */
public static void redefineClass(Class clazz, String javacode) throws Exception {
    byte[] bytecode = InMemoryJavaCompiler.compile(clazz.getName(), javacode);
    redefineClass(clazz, bytecode);
}