1 /* 2 * Copyright (c) 2017, 2018, 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/zGlobals.hpp" 28 #include "gc/z/zNMethodTableEntry.hpp" 29 #include "memory/allocation.hpp" 30 31 class ZNMethodTable : public AllStatic { 32 private: 33 static ZNMethodTableEntry* _table; 34 static size_t _size; 35 static size_t _nregistered; 36 static size_t _nunregistered; 37 static volatile size_t _claimed ATTRIBUTE_ALIGNED(ZCacheLineSize); 38 39 static ZNMethodTableEntry create_entry(nmethod* nm); 40 static void destroy_entry(ZNMethodTableEntry entry); 41 42 static nmethod* method(ZNMethodTableEntry entry); 43 44 static size_t first_index(const nmethod* nm, size_t size); 45 static size_t next_index(size_t prev_index, size_t size); 46 47 static bool register_entry(ZNMethodTableEntry* table, size_t size, ZNMethodTableEntry entry); 48 static bool unregister_entry(ZNMethodTableEntry* table, size_t size, const nmethod* nm); 49 50 static void rebuild(size_t new_size); 51 static void rebuild_if_needed(); 52 53 static void log_register(const nmethod* nm, ZNMethodTableEntry entry); 54 static void log_unregister(const nmethod* nm); 55 56 static void entry_oops_do(ZNMethodTableEntry entry, OopClosure* cl); 57 58 public: 59 static size_t registered_nmethods(); 60 static size_t unregistered_nmethods(); 61 62 static void register_nmethod(nmethod* nm); 63 static void unregister_nmethod(nmethod* nm); 64 65 static void gc_prologue(); 66 static void gc_epilogue(); 67 68 static void oops_do(OopClosure* cl); 69 }; 70 71 #endif // SHARE_GC_Z_ZNMETHODTABLE_HPP