duke@435: /*
zgu@4492:  * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
duke@435:  *
duke@435:  */
duke@435: 
duke@435: // JvmtiTagMap
duke@435: 
stefank@2314: #ifndef SHARE_VM_PRIMS_JVMTITAGMAP_HPP
stefank@2314: #define SHARE_VM_PRIMS_JVMTITAGMAP_HPP
stefank@2314: 
stefank@2314: #include "gc_interface/collectedHeap.hpp"
stefank@2314: #include "jvmtifiles/jvmti.h"
stefank@2314: #include "jvmtifiles/jvmtiEnv.hpp"
stefank@2314: #include "memory/allocation.hpp"
stefank@2314: #include "memory/genCollectedHeap.hpp"
stefank@2314: #include "memory/universe.hpp"
duke@435: 
duke@435: // forward references
duke@435: class JvmtiTagHashmap;
duke@435: class JvmtiTagHashmapEntry;
duke@435: class JvmtiTagHashmapEntryClosure;
duke@435: 
zgu@3900: class JvmtiTagMap :  public CHeapObj<mtInternal> {
duke@435:  private:
duke@435: 
duke@435:   enum{
kamg@2445:     max_free_entries = 4096         // maximum number of free entries per env
duke@435:   };
duke@435: 
duke@435:   JvmtiEnv*             _env;                       // the jvmti environment
duke@435:   Mutex                 _lock;                      // lock for this tag map
kamg@2445:   JvmtiTagHashmap*      _hashmap;                   // the hashmap
duke@435: 
duke@435:   JvmtiTagHashmapEntry* _free_entries;              // free list for this environment
duke@435:   int _free_entries_count;                          // number of entries on the free list
duke@435: 
duke@435:   // create a tag map
duke@435:   JvmtiTagMap(JvmtiEnv* env);
duke@435: 
duke@435:   // accessors
duke@435:   inline Mutex* lock()                      { return &_lock; }
duke@435:   inline JvmtiEnv* env() const              { return _env; }
duke@435: 
kamg@2445:   void do_weak_oops(BoolObjectClosure* is_alive, OopClosure* f);
duke@435: 
duke@435:   // iterate over all entries in this tag map
duke@435:   void entry_iterate(JvmtiTagHashmapEntryClosure* closure);
duke@435: 
duke@435:  public:
duke@435: 
duke@435:   // indicates if this tag map is locked
duke@435:   bool is_locked()                          { return lock()->is_locked(); }
duke@435: 
kamg@2445:   JvmtiTagHashmap* hashmap() { return _hashmap; }
duke@435: 
duke@435:   // create/destroy entries
kamg@2445:   JvmtiTagHashmapEntry* create_entry(oop ref, jlong tag);
duke@435:   void destroy_entry(JvmtiTagHashmapEntry* entry);
duke@435: 
duke@435:   // returns true if the hashmaps are empty
duke@435:   bool is_empty();
duke@435: 
duke@435:   // return tag for the given environment
duke@435:   static JvmtiTagMap* tag_map_for(JvmtiEnv* env);
duke@435: 
duke@435:   // destroy tag map
duke@435:   ~JvmtiTagMap();
duke@435: 
duke@435:   // set/get tag
duke@435:   void set_tag(jobject obj, jlong tag);
duke@435:   jlong get_tag(jobject obj);
duke@435: 
duke@435:   // deprecated heap iteration functions
duke@435:   void iterate_over_heap(jvmtiHeapObjectFilter object_filter,
duke@435:                          KlassHandle klass,
duke@435:                          jvmtiHeapObjectCallback heap_object_callback,
duke@435:                          const void* user_data);
duke@435: 
duke@435:   void iterate_over_reachable_objects(jvmtiHeapRootCallback heap_root_callback,
duke@435:                                       jvmtiStackReferenceCallback stack_ref_callback,
duke@435:                                       jvmtiObjectReferenceCallback object_ref_callback,
duke@435:                                       const void* user_data);
duke@435: 
duke@435:   void iterate_over_objects_reachable_from_object(jobject object,
duke@435:                                                   jvmtiObjectReferenceCallback object_reference_callback,
duke@435:                                                   const void* user_data);
duke@435: 
duke@435: 
duke@435:   // advanced (JVMTI 1.1) heap iteration functions
duke@435:   void iterate_through_heap(jint heap_filter,
duke@435:                             KlassHandle klass,
duke@435:                             const jvmtiHeapCallbacks* callbacks,
duke@435:                             const void* user_data);
duke@435: 
duke@435:   void follow_references(jint heap_filter,
duke@435:                          KlassHandle klass,
duke@435:                          jobject initial_object,
duke@435:                          const jvmtiHeapCallbacks* callbacks,
duke@435:                          const void* user_data);
duke@435: 
duke@435:   // get tagged objects
duke@435:   jvmtiError get_objects_with_tags(const jlong* tags, jint count,
duke@435:                                    jint* count_ptr, jobject** object_result_ptr,
duke@435:                                    jlong** tag_result_ptr);
duke@435: 
kamg@2445:   static void weak_oops_do(
jprovino@4165:       BoolObjectClosure* is_alive, OopClosure* f) NOT_JVMTI_RETURN;
duke@435: };
duke@435: 
stefank@2314: #endif // SHARE_VM_PRIMS_JVMTITAGMAP_HPP