Mercurial > hg > truffle
view src/share/vm/utilities/decoder.cpp @ 4877:c03e06373b47
Merge
author | stefank |
---|---|
date | Sat, 28 Jan 2012 01:15:34 -0800 |
parents | d7e3846464d0 |
children | db006a85bf91 |
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/* * Copyright (c) 1997, 2010, 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. * */ #include "precompiled.hpp" #include "prims/jvm.h" #include "runtime/mutexLocker.hpp" #include "utilities/decoder.hpp" #if defined(_WINDOWS) #include "decoder_windows.hpp" #elif defined(__APPLE__) #include "decoder_machO.hpp" #else #include "decoder_elf.hpp" #endif NullDecoder* Decoder::_decoder = NULL; NullDecoder Decoder::_do_nothing_decoder; Mutex* Decoder::_decoder_lock = new Mutex(Mutex::safepoint, "DecoderLock"); // _decoder_lock should already acquired before enter this method NullDecoder* Decoder::get_decoder() { assert(_decoder_lock != NULL && _decoder_lock->owned_by_self(), "Require DecoderLock to enter"); if (_decoder != NULL) { return _decoder; } // Decoder is a secondary service. Although, it is good to have, // but we can live without it. #if defined(_WINDOWS) _decoder = new (std::nothrow) WindowsDecoder(); #elif defined (__APPLE__) _decoder = new (std::nothrow)MachODecoder(); #else _decoder = new (std::nothrow)ElfDecoder(); #endif if (_decoder == NULL || _decoder->has_error()) { if (_decoder != NULL) { delete _decoder; } _decoder = &_do_nothing_decoder; } return _decoder; } bool Decoder::decode(address addr, char* buf, int buflen, int* offset, const char* modulepath) { assert(_decoder_lock != NULL, "Just check"); MutexLockerEx locker(_decoder_lock, true); NullDecoder* decoder = get_decoder(); assert(decoder != NULL, "null decoder"); return decoder->decode(addr, buf, buflen, offset, modulepath); } bool Decoder::demangle(const char* symbol, char* buf, int buflen) { assert(_decoder_lock != NULL, "Just check"); MutexLockerEx locker(_decoder_lock, true); NullDecoder* decoder = get_decoder(); assert(decoder != NULL, "null decoder"); return decoder->demangle(symbol, buf, buflen); } bool Decoder::can_decode_C_frame_in_vm() { assert(_decoder_lock != NULL, "Just check"); MutexLockerEx locker(_decoder_lock, true); NullDecoder* decoder = get_decoder(); assert(decoder != NULL, "null decoder"); return decoder->can_decode_C_frame_in_vm(); } // shutdown real decoder and replace it with // _do_nothing_decoder void Decoder::shutdown() { assert(_decoder_lock != NULL, "Just check"); MutexLockerEx locker(_decoder_lock, true); if (_decoder != NULL && _decoder != &_do_nothing_decoder) { delete _decoder; } _decoder = &_do_nothing_decoder; }