duke@435: /* duke@435: * Copyright 2003-2005 Sun Microsystems, Inc. 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: * duke@435: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, duke@435: * CA 95054 USA or visit www.sun.com if you need additional information or duke@435: * have any questions. duke@435: * duke@435: */ duke@435: duke@435: // JvmtiTagMap duke@435: duke@435: #ifndef _JAVA_JVMTI_TAG_MAP_H_ duke@435: #define _JAVA_JVMTI_TAG_MAP_H_ duke@435: duke@435: // forward references duke@435: class JvmtiTagHashmap; duke@435: class JvmtiTagHashmapEntry; duke@435: class JvmtiTagHashmapEntryClosure; duke@435: duke@435: class JvmtiTagMap : public CHeapObj { duke@435: private: duke@435: duke@435: enum{ duke@435: n_hashmaps = 2, // encapsulates 2 hashmaps duke@435: max_free_entries = 4096 // maximum number of free entries per env duke@435: }; duke@435: duke@435: // memory region for young generation duke@435: static MemRegion _young_gen; duke@435: static void get_young_generation(); duke@435: duke@435: JvmtiEnv* _env; // the jvmti environment duke@435: Mutex _lock; // lock for this tag map duke@435: JvmtiTagHashmap* _hashmap[n_hashmaps]; // the hashmaps 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: duke@435: // rehash tags maps for generation start to end duke@435: void rehash(int start, int end); duke@435: duke@435: // indicates if the object is in the young generation duke@435: static bool is_in_young(oop o); 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: duke@435: // return the appropriate hashmap for a given object duke@435: JvmtiTagHashmap* hashmap_for(oop o); duke@435: duke@435: // create/destroy entries duke@435: JvmtiTagHashmapEntry* create_entry(jweak 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: duke@435: // call post-GC to rehash the tag maps. duke@435: static void gc_epilogue(bool full); duke@435: duke@435: // call after referencing processing has completed (CMS) duke@435: static void cms_ref_processing_epilogue(); duke@435: }; duke@435: duke@435: #endif /* _JAVA_JVMTI_TAG_MAP_H_ */