author | jmasa |
Wed, 25 Jun 2014 20:41:16 -0700 | |
changeset 25354 | f6762819b488 |
parent 22872 | b6902ee5bc8d |
child 28163 | 322d55d167be |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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#include "precompiled.hpp" |
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#include "prims/jvm.h" |
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#include "runtime/os.hpp" |
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#include "utilities/decoder.hpp" |
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#include "utilities/vmError.hpp" |
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#if defined(_WINDOWS) |
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#include "decoder_windows.hpp" |
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#elif defined(__APPLE__) |
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#include "decoder_machO.hpp" |
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#elif defined(AIX) |
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#include "decoder_aix.hpp" |
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#else |
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#include "decoder_elf.hpp" |
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#endif |
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AbstractDecoder* Decoder::_shared_decoder = NULL; |
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AbstractDecoder* Decoder::_error_handler_decoder = NULL; |
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NullDecoder Decoder::_do_nothing_decoder; |
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Mutex* Decoder::_shared_decoder_lock = new Mutex(Mutex::native, |
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"SharedDecoderLock"); |
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AbstractDecoder* Decoder::get_shared_instance() { |
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assert(_shared_decoder_lock != NULL && _shared_decoder_lock->owned_by_self(), |
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"Require DecoderLock to enter"); |
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if (_shared_decoder == NULL) { |
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_shared_decoder = create_decoder(); |
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} |
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return _shared_decoder; |
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} |
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AbstractDecoder* Decoder::get_error_handler_instance() { |
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if (_error_handler_decoder == NULL) { |
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_error_handler_decoder = create_decoder(); |
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} |
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return _error_handler_decoder; |
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} |
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AbstractDecoder* Decoder::create_decoder() { |
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AbstractDecoder* decoder; |
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#if defined(_WINDOWS) |
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decoder = new (std::nothrow) WindowsDecoder(); |
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#elif defined (__APPLE__) |
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decoder = new (std::nothrow)MachODecoder(); |
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#elif defined(AIX) |
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decoder = new (std::nothrow)AIXDecoder(); |
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#else |
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decoder = new (std::nothrow)ElfDecoder(); |
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#endif |
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if (decoder == NULL || decoder->has_error()) { |
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if (decoder != NULL) { |
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delete decoder; |
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} |
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decoder = &_do_nothing_decoder; |
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} |
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return decoder; |
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} |
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inline bool DecoderLocker::is_first_error_thread() { |
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return (os::current_thread_id() == VMError::get_first_error_tid()); |
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} |
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DecoderLocker::DecoderLocker() : |
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MutexLockerEx(DecoderLocker::is_first_error_thread() ? |
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NULL : Decoder::shared_decoder_lock(), true) { |
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_decoder = is_first_error_thread() ? |
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Decoder::get_error_handler_instance() : Decoder::get_shared_instance(); |
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assert(_decoder != NULL, "null decoder"); |
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} |
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Mutex* Decoder::shared_decoder_lock() { |
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assert(_shared_decoder_lock != NULL, "Just check"); |
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return _shared_decoder_lock; |
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} |
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bool Decoder::decode(address addr, char* buf, int buflen, int* offset, const char* modulepath) { |
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assert(_shared_decoder_lock != NULL, "Just check"); |
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bool error_handling_thread = os::current_thread_id() == VMError::first_error_tid; |
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MutexLockerEx locker(error_handling_thread ? NULL : _shared_decoder_lock, true); |
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AbstractDecoder* decoder = error_handling_thread ? |
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get_error_handler_instance(): get_shared_instance(); |
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assert(decoder != NULL, "null decoder"); |
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return decoder->decode(addr, buf, buflen, offset, modulepath); |
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} |
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bool Decoder::decode(address addr, char* buf, int buflen, int* offset, const void* base) { |
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assert(_shared_decoder_lock != NULL, "Just check"); |
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bool error_handling_thread = os::current_thread_id() == VMError::first_error_tid; |
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MutexLockerEx locker(error_handling_thread ? NULL : _shared_decoder_lock, true); |
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AbstractDecoder* decoder = error_handling_thread ? |
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get_error_handler_instance(): get_shared_instance(); |
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assert(decoder != NULL, "null decoder"); |
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return decoder->decode(addr, buf, buflen, offset, base); |
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} |
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bool Decoder::demangle(const char* symbol, char* buf, int buflen) { |
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assert(_shared_decoder_lock != NULL, "Just check"); |
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bool error_handling_thread = os::current_thread_id() == VMError::first_error_tid; |
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MutexLockerEx locker(error_handling_thread ? NULL : _shared_decoder_lock, true); |
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AbstractDecoder* decoder = error_handling_thread ? |
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get_error_handler_instance(): get_shared_instance(); |
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assert(decoder != NULL, "null decoder"); |
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return decoder->demangle(symbol, buf, buflen); |
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} |
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bool Decoder::can_decode_C_frame_in_vm() { |
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assert(_shared_decoder_lock != NULL, "Just check"); |
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bool error_handling_thread = os::current_thread_id() == VMError::first_error_tid; |
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MutexLockerEx locker(error_handling_thread ? NULL : _shared_decoder_lock, true); |
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AbstractDecoder* decoder = error_handling_thread ? |
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get_error_handler_instance(): get_shared_instance(); |
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assert(decoder != NULL, "null decoder"); |
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return decoder->can_decode_C_frame_in_vm(); |
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} |
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/* |
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* Shutdown shared decoder and replace it with |
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* _do_nothing_decoder. Do nothing with error handler |
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* instance, since the JVM is going down. |
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*/ |
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void Decoder::shutdown() { |
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assert(_shared_decoder_lock != NULL, "Just check"); |
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MutexLockerEx locker(_shared_decoder_lock, true); |
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if (_shared_decoder != NULL && |
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_shared_decoder != &_do_nothing_decoder) { |
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delete _shared_decoder; |
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} |
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_shared_decoder = &_do_nothing_decoder; |
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} |
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