1 /* 2 * Copyright (c) 2018, 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 25 #ifndef SHARE_GC_SHARED_BARRIERSETNMETHOD_HPP 26 #define SHARE_GC_SHARED_BARRIERSETNMETHOD_HPP 27 28 #include "memory/allocation.hpp" 29 #include "utilities/globalDefinitions.hpp" 30 #include "utilities/sizes.hpp" 31 32 class nmethod; 33 34 class BarrierSetNMethod: public CHeapObj<mtGC> { 35 bool supports_entry_barrier(nmethod* nm); 36 void deoptimize(nmethod* nm, address* return_addr_ptr); 37 38 protected: 39 virtual int disarmed_value() const; 40 virtual bool nmethod_entry_barrier(nmethod* nm) = 0; 41 42 public: 43 virtual ByteSize thread_disarmed_offset() const = 0; 44 45 static int nmethod_stub_entry_barrier(address* return_address_ptr); 46 bool nmethod_osr_entry_barrier(nmethod* nm); 47 bool is_armed(nmethod* nm); 48 void disarm(nmethod* nm); 49 }; 50 51 52 #endif // SHARE_GC_SHARED_BARRIERSETNMETHOD_HPP