1 /* 2 * Copyright (c) 2017, 2019, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 #ifndef SHARE_GC_Z_ZNMETHODTABLE_HPP 25 #define SHARE_GC_Z_ZNMETHODTABLE_HPP 26 27 #include "gc/z/zNMethodTableIteration.hpp" 28 #include "gc/z/zSafeDelete.hpp" 29 #include "memory/allocation.hpp" 30 31 class nmethod; 32 class NMethodClosure; 33 class ZNMethodTableEntry; 34 class ZWorkers; 35 36 class ZNMethodTable : public AllStatic { 37 private: 38 static ZNMethodTableEntry* _table; 39 static size_t _size; 40 static size_t _nregistered; 41 static size_t _nunregistered; 42 static ZNMethodTableIteration _iteration; 43 static ZSafeDeleteNoLock<ZNMethodTableEntry[]> _safe_delete; 44 45 static ZNMethodTableEntry* create(size_t size); 46 static void destroy(ZNMethodTableEntry* table); 47 48 static size_t first_index(const nmethod* nm, size_t size); 49 static size_t next_index(size_t prev_index, size_t size); 50 51 static bool register_entry(ZNMethodTableEntry* table, size_t size, nmethod* nm); 52 static void unregister_entry(ZNMethodTableEntry* table, size_t size, nmethod* nm); 53 54 static void rebuild(size_t new_size); 55 static void rebuild_if_needed(); 56 57 public: 58 static size_t registered_nmethods(); 59 static size_t unregistered_nmethods(); 60 61 static void register_nmethod(nmethod* nm); 62 static void unregister_nmethod(nmethod* nm); 63 64 static void wait_until_iteration_done(); 65 66 static void nmethods_do_begin(); 67 static void nmethods_do_end(); 68 static void nmethods_do(NMethodClosure* cl); 69 70 static void unlink(ZWorkers* workers, bool unloading_occurred); 71 static void purge(ZWorkers* workers); 72 }; 73 74 #endif // SHARE_GC_Z_ZNMETHODTABLE_HPP