1 /* 2 * Copyright 1997-2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 * 23 */ 24 25 // PcDescs map a physical PC (given as offset from start of nmethod) to 26 // the corresponding source scope and byte code index. 27 28 class nmethod; 29 30 class PcDesc VALUE_OBJ_CLASS_SPEC { 31 friend class VMStructs; 32 private: 33 int _pc_offset; // offset from start of nmethod 34 int _scope_decode_offset; // offset for scope in nmethod 35 int _obj_decode_offset; 36 37 public: 38 int pc_offset() const { return _pc_offset; } 39 int scope_decode_offset() const { return _scope_decode_offset; } 40 int obj_decode_offset() const { return _obj_decode_offset; } 41 42 void set_pc_offset(int x) { _pc_offset = x; } 43 void set_scope_decode_offset(int x) { _scope_decode_offset = x; } 44 void set_obj_decode_offset(int x) { _obj_decode_offset = x; } 45 46 // Constructor (only used for static in nmethod.cpp) 47 // Also used by ScopeDesc::sender()] 48 PcDesc(int pc_offset, int scope_decode_offset, int obj_decode_offset); 49 50 enum { 51 // upper and lower exclusive limits real offsets: 52 lower_offset_limit = -1, 53 upper_offset_limit = (unsigned int)-1 >> 1 54 }; 55 56 // Returns the real pc 57 address real_pc(const nmethod* code) const; 58 59 void print(nmethod* code); 60 bool verify(nmethod* code); 61 };