added JDK8-compatibility comments

java/java-impl/src/com/intellij/openapi/vfs/impl/jrt/JrtHandler.java

@@ -15,6 +15,7 @@
  */
 package com.intellij.openapi.vfs.impl.jrt;
 
+import com.intellij.Patches;
 import com.intellij.openapi.util.text.StringUtil;
 import com.intellij.openapi.vfs.impl.ArchiveHandler;
 import com.intellij.reference.SoftReference;
@@ -34,6 +35,9 @@ import java.util.List;
 import java.util.Map;
 
 class JrtHandler extends ArchiveHandler {
+  static {
+    assert Patches.USE_REFLECTION_TO_ACCESS_JDK8;
+  }
   private static final URI ROOT_URI = URI.create("jrt:/");
   private static final Map<String, Object> EMPTY_ENV = Collections.emptyMap();
 

platform/platform-impl/src/com/intellij/concurrency/JobLauncherImpl.java

@@ -15,6 +15,7 @@
  */
 package com.intellij.concurrency;
 
+import com.intellij.Patches;
 import com.intellij.openapi.application.ex.ApplicationManagerEx;
 import com.intellij.openapi.progress.ProcessCanceledException;
 import com.intellij.openapi.progress.ProgressIndicator;
@@ -41,6 +42,9 @@ import java.util.concurrent.atomic.AtomicLong;
  */
 public class JobLauncherImpl extends JobLauncher {
   private static final AtomicLong bits = new AtomicLong();
+  static {
+    assert Patches.USE_REFLECTION_TO_ACCESS_JDK8 : "Please port to java.util.concurrent.ForkJoinPool";
+  }
   private static final ForkJoinPool.ForkJoinWorkerThreadFactory FACTORY = new ForkJoinPool.ForkJoinWorkerThreadFactory() {
     @Override
     public ForkJoinWorkerThread newThread(ForkJoinPool pool) {

platform/util/src/com/intellij/Patches.java

@@ -103,6 +103,12 @@ public class Patches {
    */
   public static final boolean USE_REFLECTION_TO_ACCESS_JDK7 = true;
 
+  /**
+   * Marker field to find all usages of the reflective access to JDK 7-specific methods
+   * which need to be changed when migrated to JDK 8
+   */
+  public static final boolean USE_REFLECTION_TO_ACCESS_JDK8 = true;
+
   /**
    * AtomicIntegerFieldUpdater does not work when SecurityManager is installed
    * fixed in JDK8