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/zArray.hpp" 28 #include "gc/z/zGlobals.hpp" 29 #include "gc/z/zLock.hpp" 30 #include "gc/z/zNMethodTableEntry.hpp" 31 #include "memory/allocation.hpp" 32 33 class ZNMethodData; 34 class ZNMethodDataOops; 35 class ZWorkers; 36 37 class ZNMethodClosure { 38 public: 39 virtual void do_nmethod(nmethod* nm) = 0; 40 }; 41 42 class ZNMethodTable : public AllStatic { 43 private: 44 static ZNMethodTableEntry* _table; 45 static size_t _size; 46 static ZNMethodTableEntry* _iter_table; 47 static size_t _iter_table_size; 48 static size_t _nregistered; 49 static size_t _nunregistered; 50 static volatile size_t _claimed ATTRIBUTE_ALIGNED(ZCacheLineSize); 51 52 static void attach_gc_data(nmethod* nm); 53 static void detach_gc_data(nmethod* nm); 54 55 static size_t first_index(const nmethod* nm, size_t size); 56 static size_t next_index(size_t prev_index, size_t size); 57 58 static void wait_until_iteration_done(); 59 60 static bool register_entry(ZNMethodTableEntry* table, size_t size, nmethod* nm); 61 static void unregister_entry(ZNMethodTableEntry* table, size_t size, nmethod* nm); 62 63 static void rebuild(size_t new_size); 64 static void rebuild_if_needed(); 65 66 static void log_register(const nmethod* nm); 67 static void log_unregister(const nmethod* nm); 68 69 public: 70 static size_t registered_nmethods(); 71 static size_t unregistered_nmethods(); 72 73 static void register_nmethod(nmethod* nm); 74 static void unregister_nmethod(nmethod* nm); 75 static void disarm_nmethod(nmethod* nm); 76 77 static ZReentrantLock* lock_for_nmethod(nmethod* nm); 78 79 static void oops_do(OopClosure* cl); 80 81 static void oops_do(nmethod* nm, OopClosure* cl); 82 83 static void nmethods_do_begin(); 84 static void nmethods_do_end(); 85 static void nmethods_do(ZNMethodClosure* cl); 86 87 static void unlink(ZWorkers* workers, bool unloading_occurred); 88 static void purge(ZWorkers* workers); 89 }; 90 91 #endif // SHARE_GC_Z_ZNMETHODTABLE_HPP