Mercurial > hg > truffle
view src/share/vm/utilities/decoder.hpp @ 4898:d851f3714641
Merge
author | dholmes |
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date | Wed, 25 Jan 2012 19:26:35 -0500 |
parents | d7e3846464d0 |
children | db006a85bf91 |
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/* * Copyright (c) 1997, 2011, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef SHARE_VM_UTILITIES_DECODER_HPP #define SHARE_VM_UTILITIES_DECODER_HPP #include "memory/allocation.hpp" #include "runtime/mutex.hpp" class NullDecoder: public CHeapObj { public: // status code for decoding native C frame enum decoder_status { not_available = -10, // real decoder is not available no_error = 0, // successfully decoded frames out_of_memory, // out of memory file_invalid, // invalid elf file file_not_found, // could not found symbol file (on windows), such as jvm.pdb or jvm.map helper_not_found, // could not load dbghelp.dll (Windows only) helper_func_error, // decoding functions not found (Windows only) helper_init_error // SymInitialize failed (Windows only) }; NullDecoder() { _decoder_status = not_available; } ~NullDecoder() {}; virtual bool decode(address pc, char* buf, int buflen, int* offset, const char* modulepath = NULL) { return false; } virtual bool demangle(const char* symbol, char* buf, int buflen) { return false; } virtual bool can_decode_C_frame_in_vm() const { return false; } virtual decoder_status status() const { return _decoder_status; } virtual bool has_error() const { return is_error(_decoder_status); } static bool is_error(decoder_status status) { return (status > 0); } protected: decoder_status _decoder_status; }; class Decoder: AllStatic { public: static bool decode(address pc, char* buf, int buflen, int* offset, const char* modulepath = NULL); static bool demangle(const char* symbol, char* buf, int buflen); static bool can_decode_C_frame_in_vm(); static void shutdown(); protected: static NullDecoder* get_decoder(); private: static NullDecoder* _decoder; static NullDecoder _do_nothing_decoder; protected: static Mutex* _decoder_lock; }; #endif // SHARE_VM_UTILITIES_DECODER_HPP