| /* |
| * Copyright (c) 1997, 2017, 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/os.hpp" |
| #include "utilities/decoder.hpp" |
| #include "utilities/vmError.hpp" |
| |
| #if defined(_WINDOWS) |
| #include "decoder_windows.hpp" |
| #include "windbghelp.hpp" |
| #elif defined(__APPLE__) |
| #include "decoder_machO.hpp" |
| #elif defined(AIX) |
| #include "decoder_aix.hpp" |
| #else |
| #include "decoder_elf.hpp" |
| #endif |
| |
| AbstractDecoder* Decoder::_shared_decoder = NULL; |
| AbstractDecoder* Decoder::_error_handler_decoder = NULL; |
| NullDecoder Decoder::_do_nothing_decoder; |
| Mutex* Decoder::_shared_decoder_lock = new Mutex(Mutex::native, |
| "SharedDecoderLock", |
| false, |
| Monitor::_safepoint_check_never); |
| |
| AbstractDecoder* Decoder::get_shared_instance() { |
| assert(_shared_decoder_lock != NULL && _shared_decoder_lock->owned_by_self(), |
| "Require DecoderLock to enter"); |
| |
| if (_shared_decoder == NULL) { |
| _shared_decoder = create_decoder(); |
| } |
| return _shared_decoder; |
| } |
| |
| AbstractDecoder* Decoder::get_error_handler_instance() { |
| if (_error_handler_decoder == NULL) { |
| _error_handler_decoder = create_decoder(); |
| } |
| return _error_handler_decoder; |
| } |
| |
| |
| AbstractDecoder* Decoder::create_decoder() { |
| AbstractDecoder* decoder; |
| #if defined(_WINDOWS) |
| decoder = new (std::nothrow) WindowsDecoder(); |
| #elif defined (__APPLE__) |
| decoder = new (std::nothrow)MachODecoder(); |
| #elif defined(AIX) |
| decoder = new (std::nothrow)AIXDecoder(); |
| #else |
| decoder = new (std::nothrow)ElfDecoder(); |
| #endif |
| |
| if (decoder == NULL || decoder->has_error()) { |
| if (decoder != NULL) { |
| delete decoder; |
| } |
| decoder = &_do_nothing_decoder; |
| } |
| return decoder; |
| } |
| |
| inline bool DecoderLocker::is_first_error_thread() { |
| return (os::current_thread_id() == VMError::get_first_error_tid()); |
| } |
| |
| DecoderLocker::DecoderLocker() : |
| MutexLockerEx(DecoderLocker::is_first_error_thread() ? |
| NULL : Decoder::shared_decoder_lock(), true) { |
| _decoder = is_first_error_thread() ? |
| Decoder::get_error_handler_instance() : Decoder::get_shared_instance(); |
| assert(_decoder != NULL, "null decoder"); |
| } |
| |
| Mutex* Decoder::shared_decoder_lock() { |
| assert(_shared_decoder_lock != NULL, "Just check"); |
| return _shared_decoder_lock; |
| } |
| |
| bool Decoder::decode(address addr, char* buf, int buflen, int* offset, const char* modulepath, bool demangle) { |
| assert(_shared_decoder_lock != NULL, "Just check"); |
| bool error_handling_thread = os::current_thread_id() == VMError::first_error_tid; |
| MutexLockerEx locker(error_handling_thread ? NULL : _shared_decoder_lock, true); |
| AbstractDecoder* decoder = error_handling_thread ? |
| get_error_handler_instance(): get_shared_instance(); |
| assert(decoder != NULL, "null decoder"); |
| |
| return decoder->decode(addr, buf, buflen, offset, modulepath, demangle); |
| } |
| |
| bool Decoder::decode(address addr, char* buf, int buflen, int* offset, const void* base) { |
| assert(_shared_decoder_lock != NULL, "Just check"); |
| bool error_handling_thread = os::current_thread_id() == VMError::first_error_tid; |
| MutexLockerEx locker(error_handling_thread ? NULL : _shared_decoder_lock, true); |
| AbstractDecoder* decoder = error_handling_thread ? |
| get_error_handler_instance(): get_shared_instance(); |
| assert(decoder != NULL, "null decoder"); |
| |
| return decoder->decode(addr, buf, buflen, offset, base); |
| } |
| |
| |
| bool Decoder::demangle(const char* symbol, char* buf, int buflen) { |
| assert(_shared_decoder_lock != NULL, "Just check"); |
| bool error_handling_thread = os::current_thread_id() == VMError::first_error_tid; |
| MutexLockerEx locker(error_handling_thread ? NULL : _shared_decoder_lock, true); |
| AbstractDecoder* decoder = error_handling_thread ? |
| get_error_handler_instance(): get_shared_instance(); |
| assert(decoder != NULL, "null decoder"); |
| return decoder->demangle(symbol, buf, buflen); |
| } |
| |
| bool Decoder::can_decode_C_frame_in_vm() { |
| assert(_shared_decoder_lock != NULL, "Just check"); |
| bool error_handling_thread = os::current_thread_id() == VMError::first_error_tid; |
| MutexLockerEx locker(error_handling_thread ? NULL : _shared_decoder_lock, true); |
| AbstractDecoder* decoder = error_handling_thread ? |
| get_error_handler_instance(): get_shared_instance(); |
| assert(decoder != NULL, "null decoder"); |
| return decoder->can_decode_C_frame_in_vm(); |
| } |
| |
| /* |
| * Shutdown shared decoder and replace it with |
| * _do_nothing_decoder. Do nothing with error handler |
| * instance, since the JVM is going down. |
| */ |
| void Decoder::shutdown() { |
| assert(_shared_decoder_lock != NULL, "Just check"); |
| MutexLockerEx locker(_shared_decoder_lock, true); |
| |
| if (_shared_decoder != NULL && |
| _shared_decoder != &_do_nothing_decoder) { |
| delete _shared_decoder; |
| } |
| |
| _shared_decoder = &_do_nothing_decoder; |
| } |
| |
| void Decoder::print_state_on(outputStream* st) { |
| #ifdef _WINDOWS |
| WindowsDbgHelp::print_state_on(st); |
| #endif |
| } |
| |