[platform] prevents JVM-specific VM options from being dynamic

platform/lang-api/src/com/intellij/openapi/projectRoots/JdkUtil.java

@@ -229,7 +229,7 @@ public class JdkUtil {
         vmParamsFile = FileUtil.createTempFile("idea_vm_params", null);
         try (PrintWriter writer = new PrintWriter(vmParamsFile)) {
           for (String param : vmParametersList.getList()) {
-            if (param.startsWith("-D")) {
+            if (isUserDefinedProperty(param)) {
               writer.println(param);
             }
             else {
@@ -324,7 +324,7 @@ public class JdkUtil {
       if (dynamicVMOptions) {
         List<String> properties = new ArrayList<>();
         for (String param : vmParametersList.getList()) {
-          if (param.startsWith("-D")) {
+          if (isUserDefinedProperty(param)) {
             properties.add(param);
           }
           else {
@@ -367,6 +367,11 @@ public class JdkUtil {
     return dynamicParameters;
   }
 
+  @SuppressWarnings("SpellCheckingInspection")
+  private static boolean isUserDefinedProperty(String param) {
+    return param.startsWith("-D") && !(param.startsWith("-Dsun.") || param.startsWith("-Djava."));
+  }
+
   private static void throwUnableToCreateTempFile(IOException cause) throws CantRunException {
     throw new CantRunException("Failed to a create temporary file in " + FileUtilRt.getTempDirectory(), cause);
   }