8271420: Extend CDS custom loader support to Windows platform

Reviewed-by: iklam, ccheung

Author: yminqi

src/hotspot/share/cds/classListParser.cpp

@@ -446,9 +446,9 @@ void ClassListParser::error(const char* msg, ...) {
 // This function is used for loading classes for customized class loaders
 // during archive dumping.
 InstanceKlass* ClassListParser::load_class_from_source(Symbol* class_name, TRAPS) {
-#if !(defined(_LP64) && (defined(LINUX) || defined(__APPLE__)))
+#if !(defined(_LP64) && (defined(LINUX) || defined(__APPLE__) || defined(_WINDOWS)))
   // The only supported platforms are: (1) Linux/64-bit and (2) Solaris/64-bit and
-  // (3) MacOSX/64-bit
+  // (3) MacOSX/64-bit and (4) Windowss/64-bit
   // This #if condition should be in sync with the areCustomLoadersSupportedForCDS
   // method in test/lib/jdk/test/lib/Platform.java.
   error("AppCDS custom class loaders not supported on this platform");

test/hotspot/jtreg/runtime/cds/appcds/loaderConstraints/LoaderConstraintsTest.java

@@ -51,7 +51,6 @@
 import com.sun.net.httpserver.HttpHandler;
 import jdk.test.lib.Asserts;
 import jdk.test.lib.helpers.ClassFileInstaller;
-import jdk.test.lib.Platform;
 
 public class LoaderConstraintsTest  {
     static String mainClass = LoaderConstraintsApp.class.getName();

test/hotspot/jtreg/runtime/cds/appcds/test-classes/CustomAppLoader.java

@@ -40,7 +40,7 @@ public class CustomAppLoader {
     // args[2...] = arguments for the main class
     public static void main(String args[]) throws Throwable {
         File f = new File(args[0]);
-        URL[] classLoaderUrls = new URL[] {new URL("file://" + f.getCanonicalPath())};
+        URL[] classLoaderUrls = new URL[] {f.getAbsoluteFile().toURI().toURL()};
         URLClassLoader loader = new URLClassLoader(classLoaderUrls, CustomAppLoader.class.getClassLoader());
         Class k = Class.forName(args[1], true, loader);
         Class parameterTypes[] = new Class[] {String[].class};
@@ -52,4 +52,4 @@ public static void main(String args[]) throws Throwable {
         }
         mainMethod.invoke(null, invokeArgs);
     }
-}
+}

test/lib/jdk/test/lib/Platform.java

@@ -387,6 +387,6 @@ public static boolean isDefaultCDSArchiveSupported() {
      * This should match the #if condition in ClassListParser::load_class_from_source().
      */
     public static boolean areCustomLoadersSupportedForCDS() {
-        return (is64bit() && (isLinux() || isOSX()));
+        return (is64bit() && (isLinux() || isOSX() || isWindows()));
     }
 }