1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/code/pcDesc.hpp Sat Dec 01 00:00:00 2007 +0000
1.3 @@ -0,0 +1,61 @@
1.4 +/*
1.5 + * Copyright 1997-2005 Sun Microsystems, Inc. All Rights Reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.24 + * have any questions.
1.25 + *
1.26 + */
1.27 +
1.28 +// PcDescs map a physical PC (given as offset from start of nmethod) to
1.29 +// the corresponding source scope and byte code index.
1.30 +
1.31 +class nmethod;
1.32 +
1.33 +class PcDesc VALUE_OBJ_CLASS_SPEC {
1.34 + friend class VMStructs;
1.35 + private:
1.36 + int _pc_offset; // offset from start of nmethod
1.37 + int _scope_decode_offset; // offset for scope in nmethod
1.38 + int _obj_decode_offset;
1.39 +
1.40 + public:
1.41 + int pc_offset() const { return _pc_offset; }
1.42 + int scope_decode_offset() const { return _scope_decode_offset; }
1.43 + int obj_decode_offset() const { return _obj_decode_offset; }
1.44 +
1.45 + void set_pc_offset(int x) { _pc_offset = x; }
1.46 + void set_scope_decode_offset(int x) { _scope_decode_offset = x; }
1.47 + void set_obj_decode_offset(int x) { _obj_decode_offset = x; }
1.48 +
1.49 + // Constructor (only used for static in nmethod.cpp)
1.50 + // Also used by ScopeDesc::sender()]
1.51 + PcDesc(int pc_offset, int scope_decode_offset, int obj_decode_offset);
1.52 +
1.53 + enum {
1.54 + // upper and lower exclusive limits real offsets:
1.55 + lower_offset_limit = -1,
1.56 + upper_offset_limit = (unsigned int)-1 >> 1
1.57 + };
1.58 +
1.59 + // Returns the real pc
1.60 + address real_pc(const nmethod* code) const;
1.61 +
1.62 + void print(nmethod* code);
1.63 + bool verify(nmethod* code);
1.64 +};
