Mercurial > hg > truffle
diff src/share/vm/code/pcDesc.hpp @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | 72088be4b386 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/code/pcDesc.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,61 @@ +/* + * Copyright 1997-2005 Sun Microsystems, Inc. All Rights Reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +// PcDescs map a physical PC (given as offset from start of nmethod) to +// the corresponding source scope and byte code index. + +class nmethod; + +class PcDesc VALUE_OBJ_CLASS_SPEC { + friend class VMStructs; + private: + int _pc_offset; // offset from start of nmethod + int _scope_decode_offset; // offset for scope in nmethod + int _obj_decode_offset; + + public: + int pc_offset() const { return _pc_offset; } + int scope_decode_offset() const { return _scope_decode_offset; } + int obj_decode_offset() const { return _obj_decode_offset; } + + void set_pc_offset(int x) { _pc_offset = x; } + void set_scope_decode_offset(int x) { _scope_decode_offset = x; } + void set_obj_decode_offset(int x) { _obj_decode_offset = x; } + + // Constructor (only used for static in nmethod.cpp) + // Also used by ScopeDesc::sender()] + PcDesc(int pc_offset, int scope_decode_offset, int obj_decode_offset); + + enum { + // upper and lower exclusive limits real offsets: + lower_offset_limit = -1, + upper_offset_limit = (unsigned int)-1 >> 1 + }; + + // Returns the real pc + address real_pc(const nmethod* code) const; + + void print(nmethod* code); + bool verify(nmethod* code); +};