1 /* 2 * Copyright (c) 2003, 2007, Oracle and/or its affiliates. All rights reserved. 3 * Copyright 2008, 2009, 2010 Red Hat, Inc. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 class ZeroEntry { 27 public: 28 ZeroEntry() { 29 ShouldNotCallThis(); 30 } 31 32 private: 33 address _entry_point; 34 35 public: 36 address entry_point() const { 37 return _entry_point; 38 } 39 void set_entry_point(address entry_point) { 40 _entry_point = entry_point; 41 } 42 43 private: 44 typedef int (*NormalEntryFunc)(methodOop method, 45 intptr_t base_pc, 46 TRAPS); 47 typedef int (*OSREntryFunc)(methodOop method, 48 address osr_buf, 49 intptr_t base_pc, 50 TRAPS); 51 52 public: 53 void invoke(methodOop method, TRAPS) const { 54 maybe_deoptimize( 55 ((NormalEntryFunc) entry_point())(method, (intptr_t) this, THREAD), 56 THREAD); 57 } 58 void invoke_osr(methodOop method, address osr_buf, TRAPS) const { 59 maybe_deoptimize( 60 ((OSREntryFunc) entry_point())(method, osr_buf, (intptr_t) this, THREAD), 61 THREAD); 62 } 63 64 private: 65 static void maybe_deoptimize(int deoptimized_frames, TRAPS) { 66 if (deoptimized_frames) 67 CppInterpreter::main_loop(deoptimized_frames - 1, THREAD); 68 } 69 70 public: 71 static ByteSize entry_point_offset() { 72 return byte_offset_of(ZeroEntry, _entry_point); 73 } 74 };