8260571: Add PrintMetaspaceStatistics to print metaspace statistics upon VM exit

Reviewed-by: iklam

Author: tstuefe

src/hotspot/share/runtime/globals.hpp

@@ -1490,6 +1490,9 @@ const intx ObjectAlignmentInBytes = 8;
   product(ccstr, MetaspaceReclaimPolicy, "balanced",                        \
           "options: balanced, aggressive, none")                            \
                                                                             \
+  product(bool, PrintMetaspaceStatisticsAtExit, false, DIAGNOSTIC,          \
+          "Print metaspace statistics upon VM exit.")                       \
+                                                                            \
   product(bool, MetaspaceGuardAllocations, false, DIAGNOSTIC,               \
           "Metapace allocations are guarded.")                              \
                                                                             \

src/hotspot/share/runtime/java.cpp

@@ -328,6 +328,10 @@ void print_statistics() {
     MemTracker::final_report(tty);
   }
 
+  if (PrintMetaspaceStatisticsAtExit) {
+    MetaspaceUtils::print_basic_report(tty, 0);
+  }
+
   ThreadsSMRSupport::log_statistics();
 }
 
@@ -370,6 +374,10 @@ void print_statistics() {
     MemTracker::final_report(tty);
   }
 
+  if (PrintMetaspaceStatisticsAtExit) {
+    MetaspaceUtils::print_basic_report(tty, 0);
+  }
+
   if (LogTouchedMethods && PrintTouchedMethodsAtExit) {
     Method::print_touched_methods(tty);
   }