src/share/vm/classfile/classLoaderData.hpp

rev 4773 : 8005849: JEP 167: Event-Based JVM Tracing
Reviewed-by: acorn, coleenp, sla
Contributed-by: Karen Kinnear <karen.kinnear@oracle.com>, Bengt Rutisson <bengt.rutisson@oracle.com>, Calvin Cheung <calvin.cheung@oracle.com>, Erik Gahlin <erik.gahlin@oracle.com>, Erik Helin <erik.helin@oracle.com>, Jesper Wilhelmsson <jesper.wilhelmsson@oracle.com>, Keith McGuigan <keith.mcguigan@oracle.com>, Mattias Tobiasson <mattias.tobiasson@oracle.com>, Markus Gronlund <markus.gronlund@oracle.com>, Mikael Auno <mikael.auno@oracle.com>, Nils Eliasson <nils.eliasson@oracle.com>, Nils Loodin <nils.loodin@oracle.com>, Rickard Backman <rickard.backman@oracle.com>, Staffan Larsen <staffan.larsen@oracle.com>, Stefan Karlsson <stefan.karlsson@oracle.com>, Yekaterina Kantserova <yekaterina.kantserova@oracle.com>

@@ -30,10 +30,14 @@
 #include "memory/metaspace.hpp"
 #include "memory/metaspaceCounters.hpp"
 #include "runtime/mutex.hpp"
 #include "utilities/growableArray.hpp"
 
+#if INCLUDE_TRACE
+# include "trace/traceTime.hpp"
+#endif
+
 //
 // A class loader represents a linkset. Conceptually, a linkset identifies
 // the complete transitive closure of resolved links that a dynamic linker can
 // produce.
 //

@@ -47,10 +51,11 @@
 
 class ClassLoaderData;
 class JNIMethodBlock;
 class JNIHandleBlock;
 class Metadebug;
+
 // GC root for walking class loader data created
 
 class ClassLoaderDataGraph : public AllStatic {
   friend class ClassLoaderData;
   friend class ClassLoaderDataGraphMetaspaceIterator;

@@ -61,18 +66,21 @@
   static ClassLoaderData* _unloading;
   // CMS support.
   static ClassLoaderData* _saved_head;
 
   static ClassLoaderData* add(Handle class_loader, bool anonymous, TRAPS);
+  static void post_class_unload_events(void);
  public:
   static ClassLoaderData* find_or_create(Handle class_loader, TRAPS);
   static void purge();
   static void clear_claimed_marks();
   static void oops_do(OopClosure* f, KlassClosure* klass_closure, bool must_claim);
   static void always_strong_oops_do(OopClosure* blk, KlassClosure* klass_closure, bool must_claim);
   static void keep_alive_oops_do(OopClosure* blk, KlassClosure* klass_closure, bool must_claim);
   static void classes_do(KlassClosure* klass_closure);
+  static void classes_do(void f(Klass* const));
+  static void classes_unloading_do(void f(Klass* const));
   static bool do_unloading(BoolObjectClosure* is_alive);
 
   // CMS support.
   static void remember_new_clds(bool remember) { _saved_head = (remember ? _head : NULL); }
   static GrowableArray<ClassLoaderData*>* new_clds();

@@ -84,10 +92,16 @@
 #ifndef PRODUCT
   // expensive test for pointer in metaspace for debugging
   static bool contains(address x);
   static bool contains_loader_data(ClassLoaderData* loader_data);
 #endif
+
+#if INCLUDE_TRACE
+ private:
+  static TracingTime _class_unload_time;
+  static void class_unload_event(Klass* const k);
+#endif
 };
 
 // ClassLoaderData class
 
 class ClassLoaderData : public CHeapObj<mtClass> {

@@ -169,11 +183,11 @@
   bool claim();
 
   void unload();
   bool keep_alive() const       { return _keep_alive; }
   bool is_alive(BoolObjectClosure* is_alive_closure) const;
-
+  void classes_do(void f(Klass*));
   void classes_do(void f(InstanceKlass*));
 
   // Deallocate free list during class unloading.
   void free_deallocate_list();