RFR(S) 8196923: [REDO] NMT: Report array class count in NMT summary

[Zhengyu Gu]

This patch fixed compilation errors on Windows in early patch 
(JDK-8193184), due following size_t => int conversions.

classLoaderData.cpp.patch

    InstanceKlass* try_get_next_class() {
      assert(SafepointSynchronize::is_at_safepoint(), "only called at safepoint");
-    int max_classes = InstanceKlass::number_of_instance_classes();
+    size_t max_classes = ClassLoaderDataGraph::num_instance_classes();
      assert(max_classes > 0, "should not be called with no instance classes");
-    for (int i = 0; i < max_classes; ) {
+    for (size_t i = 0; i < max_classes; ) {


compilationPolicy.cpp.patch

    assert(SafepointSynchronize::is_at_safepoint(), "can only be executed at a safepoint");
-  int nclasses = InstanceKlass::number_of_instance_classes();
-  int classes_per_tick = nclasses * (CounterDecayMinIntervalLength * 1e-3 /
+  size_t nclasses = ClassLoaderDataGraph::num_instance_classes();
+  size_t classes_per_tick = nclasses * (CounterDecayMinIntervalLength * 1e-3 /
                                          CounterHalfLifeTime);
-  for (int i = 0; i < classes_per_tick; i++) {
+  for (size_t i = 0; i < classes_per_tick; i++) {
      InstanceKlass* k = ClassLoaderDataGraph::try_get_next_class();
      if (k != NULL) {
        k->methods_do(do_method);

Bug: https://bugs.openjdk.java.net/browse/JDK-8196923

Webrev: http://cr.openjdk.java.net/~zgu/8196923/webrev.00/

Test:

   hotspot_runtime on Linux 64 (fastdebug and release)

Thanks,

-Zhengyu