zgu@2364: /*
mikael@6198:  * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
zgu@2364:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
zgu@2364:  *
zgu@2364:  * This code is free software; you can redistribute it and/or modify it
zgu@2364:  * under the terms of the GNU General Public License version 2 only, as
zgu@2364:  * published by the Free Software Foundation.
zgu@2364:  *
zgu@2364:  * This code is distributed in the hope that it will be useful, but WITHOUT
zgu@2364:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
zgu@2364:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
zgu@2364:  * version 2 for more details (a copy is included in the LICENSE file that
zgu@2364:  * accompanied this code).
zgu@2364:  *
zgu@2364:  * You should have received a copy of the GNU General Public License version
zgu@2364:  * 2 along with this work; if not, write to the Free Software Foundation,
zgu@2364:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
zgu@2364:  *
zgu@2364:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
zgu@2364:  * or visit www.oracle.com if you need additional information or have any
zgu@2364:  * questions.
zgu@2364:  *
zgu@2364:  */
zgu@2364: 
zgu@2364: #include "precompiled.hpp"
zgu@2364: #include "prims/jvm.h"
zgu@3544: #include "runtime/os.hpp"
zgu@2364: #include "utilities/decoder.hpp"
zgu@3544: #include "utilities/vmError.hpp"
zgu@2364: 
zgu@3430: #if defined(_WINDOWS)
zgu@3430:   #include "decoder_windows.hpp"
zgu@3430: #elif defined(__APPLE__)
zgu@3430:   #include "decoder_machO.hpp"
goetz@6461: #elif defined(AIX)
goetz@6461:   #include "decoder_aix.hpp"
zgu@3430: #else
zgu@3430:   #include "decoder_elf.hpp"
zgu@3430: #endif
zgu@2364: 
zgu@3544: AbstractDecoder*  Decoder::_shared_decoder = NULL;
zgu@3544: AbstractDecoder*  Decoder::_error_handler_decoder = NULL;
zgu@3544: NullDecoder       Decoder::_do_nothing_decoder;
zgu@3544: Mutex*            Decoder::_shared_decoder_lock = new Mutex(Mutex::native,
zgu@3544:                                 "SharedDecoderLock");
zgu@2364: 
zgu@3544: AbstractDecoder* Decoder::get_shared_instance() {
zgu@3544:   assert(_shared_decoder_lock != NULL && _shared_decoder_lock->owned_by_self(),
zgu@3430:     "Require DecoderLock to enter");
zgu@2364: 
zgu@3544:   if (_shared_decoder == NULL) {
zgu@3544:     _shared_decoder = create_decoder();
zgu@3430:   }
zgu@3544:   return _shared_decoder;
zgu@3544: }
zgu@3430: 
zgu@3544: AbstractDecoder* Decoder::get_error_handler_instance() {
zgu@3544:   if (_error_handler_decoder == NULL) {
zgu@3544:     _error_handler_decoder = create_decoder();
zgu@3544:   }
zgu@3544:   return _error_handler_decoder;
zgu@3544: }
zgu@3544: 
zgu@3544: 
zgu@3544: AbstractDecoder* Decoder::create_decoder() {
zgu@3544:   AbstractDecoder* decoder;
zgu@3430: #if defined(_WINDOWS)
zgu@3544:   decoder = new (std::nothrow) WindowsDecoder();
zgu@3430: #elif defined (__APPLE__)
zgu@3544:   decoder = new (std::nothrow)MachODecoder();
goetz@6461: #elif defined(AIX)
goetz@6461:   decoder = new (std::nothrow)AIXDecoder();
zgu@3430: #else
zgu@3544:   decoder = new (std::nothrow)ElfDecoder();
zgu@3430: #endif
zgu@3430: 
zgu@3544:   if (decoder == NULL || decoder->has_error()) {
zgu@3544:     if (decoder != NULL) {
zgu@3544:       delete decoder;
zgu@3430:     }
zgu@3544:     decoder = &_do_nothing_decoder;
zgu@3430:   }
zgu@3544:   return decoder;
zgu@3430: }
zgu@3430: 
iklam@5667: inline bool DecoderLocker::is_first_error_thread() {
iklam@5667:   return (os::current_thread_id() == VMError::get_first_error_tid());
iklam@5667: }
iklam@5667: 
iklam@5667: DecoderLocker::DecoderLocker() :
iklam@5667:   MutexLockerEx(DecoderLocker::is_first_error_thread() ?
iklam@5667:                 NULL : Decoder::shared_decoder_lock(), true) {
iklam@5667:   _decoder = is_first_error_thread() ?
iklam@5667:     Decoder::get_error_handler_instance() : Decoder::get_shared_instance();
iklam@5667:   assert(_decoder != NULL, "null decoder");
iklam@5667: }
iklam@5667: 
iklam@5667: Mutex* Decoder::shared_decoder_lock() {
iklam@5667:   assert(_shared_decoder_lock != NULL, "Just check");
iklam@5667:   return _shared_decoder_lock;
iklam@5667: }
iklam@5667: 
zgu@3430: bool Decoder::decode(address addr, char* buf, int buflen, int* offset, const char* modulepath) {
zgu@3544:   assert(_shared_decoder_lock != NULL, "Just check");
zgu@3544:   bool error_handling_thread = os::current_thread_id() == VMError::first_error_tid;
zgu@3544:   MutexLockerEx locker(error_handling_thread ? NULL : _shared_decoder_lock, true);
zgu@3544:   AbstractDecoder* decoder = error_handling_thread ?
zgu@3544:     get_error_handler_instance(): get_shared_instance();
zgu@3430:   assert(decoder != NULL, "null decoder");
zgu@3430: 
zgu@3430:   return decoder->decode(addr, buf, buflen, offset, modulepath);
zgu@3430: }
zgu@3430: 
zgu@3961: bool Decoder::decode(address addr, char* buf, int buflen, int* offset, const void* base) {
zgu@3961:   assert(_shared_decoder_lock != NULL, "Just check");
zgu@3961:   bool error_handling_thread = os::current_thread_id() == VMError::first_error_tid;
zgu@3961:   MutexLockerEx locker(error_handling_thread ? NULL : _shared_decoder_lock, true);
zgu@3961:   AbstractDecoder* decoder = error_handling_thread ?
zgu@3961:     get_error_handler_instance(): get_shared_instance();
zgu@3961:   assert(decoder != NULL, "null decoder");
zgu@3961: 
zgu@3961:   return decoder->decode(addr, buf, buflen, offset, base);
zgu@3961: }
zgu@3961: 
zgu@3961: 
zgu@3430: bool Decoder::demangle(const char* symbol, char* buf, int buflen) {
zgu@3544:   assert(_shared_decoder_lock != NULL, "Just check");
zgu@3544:   bool error_handling_thread = os::current_thread_id() == VMError::first_error_tid;
zgu@3544:   MutexLockerEx locker(error_handling_thread ? NULL : _shared_decoder_lock, true);
zgu@3544:   AbstractDecoder* decoder = error_handling_thread ?
zgu@3544:     get_error_handler_instance(): get_shared_instance();
zgu@3430:   assert(decoder != NULL, "null decoder");
zgu@3430:   return decoder->demangle(symbol, buf, buflen);
zgu@3430: }
zgu@2364: 
zgu@2364: bool Decoder::can_decode_C_frame_in_vm() {
zgu@3544:   assert(_shared_decoder_lock != NULL, "Just check");
zgu@3544:   bool error_handling_thread = os::current_thread_id() == VMError::first_error_tid;
zgu@3544:   MutexLockerEx locker(error_handling_thread ? NULL : _shared_decoder_lock, true);
zgu@3544:   AbstractDecoder* decoder = error_handling_thread ?
zgu@3544:     get_error_handler_instance(): get_shared_instance();
zgu@3430:   assert(decoder != NULL, "null decoder");
zgu@3430:   return decoder->can_decode_C_frame_in_vm();
zgu@2364: }
zgu@2364: 
zgu@3544: /*
zgu@3544:  * Shutdown shared decoder and replace it with
zgu@3544:  * _do_nothing_decoder. Do nothing with error handler
zgu@3544:  * instance, since the JVM is going down.
zgu@3544:  */
zgu@3430: void Decoder::shutdown() {
zgu@3544:   assert(_shared_decoder_lock != NULL, "Just check");
zgu@3544:   MutexLockerEx locker(_shared_decoder_lock, true);
zgu@3430: 
zgu@3544:   if (_shared_decoder != NULL &&
zgu@3544:     _shared_decoder != &_do_nothing_decoder) {
zgu@3544:     delete _shared_decoder;
zgu@3430:   }
zgu@3430: 
zgu@3544:   _shared_decoder = &_do_nothing_decoder;
zgu@2364: }
zgu@2364: