8254599: CDS dump should not warn about hidden classes

Reviewed-by: redestad, lfoltan, iklam

Author: yminqi

src/hotspot/share/classfile/systemDictionaryShared.cpp

@@ -1346,7 +1346,8 @@ bool SystemDictionaryShared::should_be_excluded(InstanceKlass* k) {
   }
 
   if (k->is_hidden() && !is_registered_lambda_proxy_class(k)) {
-    warn_excluded(k, "Hidden class");
+    ResourceMark rm;
+    log_debug(cds)("Skipping %s: %s", k->name()->as_C_string(), "Hidden class");
     return true;
   }
 

test/hotspot/jtreg/runtime/cds/appcds/dynamicArchive/LambdaCustomLoader.java

@@ -45,15 +45,15 @@ static void test() throws Exception {
         String mainClass = "CustomLoaderApp";
 
         dump(topArchiveName,
-            "-Xlog:class+load,cds,cds+dynamic",
+            "-Xlog:class+load,cds=debug,cds+dynamic",
             "-cp", appJar, mainClass, appJar)
             .assertNormalExit(output -> {
                 output.shouldMatch("Skipping.LambHello[$][$]Lambda[$].*0x.*:.Hidden.class")
                       .shouldHaveExitValue(0);
             });
 
         run(topArchiveName,
-            "-Xlog:class+load,class+unload=info",
+            "-Xlog:class+load,class+unload",
             "-cp", appJar, mainClass, appJar)
             .assertNormalExit(output -> {
                 output.shouldMatch("class.load.*LambHello[$][$]Lambda[$].*0x.*source:.LambHello")

test/hotspot/jtreg/runtime/cds/appcds/dynamicArchive/LambdaProxyCallerIsHidden.java

@@ -53,7 +53,7 @@ static void test() throws Exception {
         String mainClass = "LambdaProxyCallerIsHiddenApp";
 
         dump(topArchiveName,
-            "-Xlog:class+load,cds+dynamic,cds",
+            "-Xlog:class+load,cds+dynamic,cds=debug",
             "-cp", appJar, mainClass)
             .assertNormalExit(output -> {
                 output.shouldMatch("Skipping.LambdaHello_0x.*[$][$]Lambda[$].*:.Hidden.class")

test/hotspot/jtreg/runtime/cds/appcds/dynamicArchive/RegularHiddenClass.java

@@ -51,7 +51,7 @@ static void test() throws Exception {
         String mainClass = "InstantiateHiddenClass";
 
         dump(topArchiveName,
-            "-Xlog:class+load=debug,cds+dynamic,cds",
+            "-Xlog:class+load=debug,cds+dynamic,cds=debug",
             "-cp", appJar, mainClass)
             .assertNormalExit(output -> {
                 output.shouldMatch("cds.*Skipping.TestClass.0x.*Hidden.class")