[EagerAppCDS] fix bug caused by using lambda in ClassLoader.java

Summary: Don't use lambda in ClassLoader.java since jvm may fail during
initializing.

Testing: aqavit test

Reviewers: lingjun-cg, yuleil

Issue: #603

jdk/src/share/classes/java/lang/ClassLoader.java

@@ -48,7 +48,7 @@
 import java.security.cert.Certificate;
 import java.util.*;
 import java.util.concurrent.ConcurrentHashMap;
-
+import java.util.function.Function;
 /**
  * A class loader is an object that is responsible for loading classes. The
  * class <tt>ClassLoader</tt> is an abstract class.  Given the <a
@@ -1710,10 +1710,10 @@ protected Package definePackage(String name, String specTitle,
         if (pkg != null) {
             throw new IllegalArgumentException(name);
         }
-        final Package new_pkg = new Package(name, specTitle, specVersion, specVendor,
+        pkg= new Package(name, specTitle, specVersion, specVendor,
                           implTitle, implVersion, implVendor,
                           sealBase, this);
-        if (packages.computeIfAbsent(name, key -> new_pkg) != new_pkg) {
+        if (packages.putIfAbsent(name, pkg) != null) {
             throw new IllegalArgumentException(name);
         }
         return pkg;

jdk/test/java/lang/invoke/lambda/LogGeneratedClassesTest.java

@@ -125,8 +125,7 @@ public void testLogging() throws IOException {
                                "-Djava.security.manager",
                                "com.example.TestLambda");
         // dump/com/example + 2 class files
-        // dump/java/lang + 1 class file
-        assertEquals(Files.walk(Paths.get("dump")).count(), 8, "Two lambda captured");
+        assertEquals(Files.walk(Paths.get("dump")).count(), 5, "Two lambda captured");
         tr.assertZero("Should still return 0");
     }
 
@@ -237,8 +236,7 @@ public void testLoggingException() throws IOException {
                                   .count(),
                      2, "show error each capture");
         // dumpLong/com/example/nosense/nosense
-        // dumpLong/java/lang + 1 file
-        assertEquals(Files.walk(Paths.get("dumpLong")).count(), 8, "Two lambda captured failed to log");
+        assertEquals(Files.walk(Paths.get("dumpLong")).count(), 5, "Two lambda captured failed to log");
         tr.assertZero("Should still return 0");
     }
 }