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comparison: src/share/vm/utilities/decoder.cpp
src/share/vm/utilities/decoder.cpp
- changeset 0
- f90c822e73f8
- child 6876
- 710a3c8b516e
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| 1 /* | |
| 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 20 * or visit www.oracle.com if you need additional information or have any | |
| 21 * questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #include "precompiled.hpp" | |
| 26 #include "prims/jvm.h" | |
| 27 #include "runtime/os.hpp" | |
| 28 #include "utilities/decoder.hpp" | |
| 29 #include "utilities/vmError.hpp" | |
| 30 | |
| 31 #if defined(_WINDOWS) | |
| 32 #include "decoder_windows.hpp" | |
| 33 #elif defined(__APPLE__) | |
| 34 #include "decoder_machO.hpp" | |
| 35 #elif defined(AIX) | |
| 36 #include "decoder_aix.hpp" | |
| 37 #else | |
| 38 #include "decoder_elf.hpp" | |
| 39 #endif | |
| 40 | |
| 41 AbstractDecoder* Decoder::_shared_decoder = NULL; | |
| 42 AbstractDecoder* Decoder::_error_handler_decoder = NULL; | |
| 43 NullDecoder Decoder::_do_nothing_decoder; | |
| 44 Mutex* Decoder::_shared_decoder_lock = new Mutex(Mutex::native, | |
| 45 "SharedDecoderLock"); | |
| 46 | |
| 47 AbstractDecoder* Decoder::get_shared_instance() { | |
| 48 assert(_shared_decoder_lock != NULL && _shared_decoder_lock->owned_by_self(), | |
| 49 "Require DecoderLock to enter"); | |
| 50 | |
| 51 if (_shared_decoder == NULL) { | |
| 52 _shared_decoder = create_decoder(); | |
| 53 } | |
| 54 return _shared_decoder; | |
| 55 } | |
| 56 | |
| 57 AbstractDecoder* Decoder::get_error_handler_instance() { | |
| 58 if (_error_handler_decoder == NULL) { | |
| 59 _error_handler_decoder = create_decoder(); | |
| 60 } | |
| 61 return _error_handler_decoder; | |
| 62 } | |
| 63 | |
| 64 | |
| 65 AbstractDecoder* Decoder::create_decoder() { | |
| 66 AbstractDecoder* decoder; | |
| 67 #if defined(_WINDOWS) | |
| 68 decoder = new (std::nothrow) WindowsDecoder(); | |
| 69 #elif defined (__APPLE__) | |
| 70 decoder = new (std::nothrow)MachODecoder(); | |
| 71 #elif defined(AIX) | |
| 72 decoder = new (std::nothrow)AIXDecoder(); | |
| 73 #else | |
| 74 decoder = new (std::nothrow)ElfDecoder(); | |
| 75 #endif | |
| 76 | |
| 77 if (decoder == NULL || decoder->has_error()) { | |
| 78 if (decoder != NULL) { | |
| 79 delete decoder; | |
| 80 } | |
| 81 decoder = &_do_nothing_decoder; | |
| 82 } | |
| 83 return decoder; | |
| 84 } | |
| 85 | |
| 86 inline bool DecoderLocker::is_first_error_thread() { | |
| 87 return (os::current_thread_id() == VMError::get_first_error_tid()); | |
| 88 } | |
| 89 | |
| 90 DecoderLocker::DecoderLocker() : | |
| 91 MutexLockerEx(DecoderLocker::is_first_error_thread() ? | |
| 92 NULL : Decoder::shared_decoder_lock(), true) { | |
| 93 _decoder = is_first_error_thread() ? | |
| 94 Decoder::get_error_handler_instance() : Decoder::get_shared_instance(); | |
| 95 assert(_decoder != NULL, "null decoder"); | |
| 96 } | |
| 97 | |
| 98 Mutex* Decoder::shared_decoder_lock() { | |
| 99 assert(_shared_decoder_lock != NULL, "Just check"); | |
| 100 return _shared_decoder_lock; | |
| 101 } | |
| 102 | |
| 103 bool Decoder::decode(address addr, char* buf, int buflen, int* offset, const char* modulepath) { | |
| 104 assert(_shared_decoder_lock != NULL, "Just check"); | |
| 105 bool error_handling_thread = os::current_thread_id() == VMError::first_error_tid; | |
| 106 MutexLockerEx locker(error_handling_thread ? NULL : _shared_decoder_lock, true); | |
| 107 AbstractDecoder* decoder = error_handling_thread ? | |
| 108 get_error_handler_instance(): get_shared_instance(); | |
| 109 assert(decoder != NULL, "null decoder"); | |
| 110 | |
| 111 return decoder->decode(addr, buf, buflen, offset, modulepath); | |
| 112 } | |
| 113 | |
| 114 bool Decoder::decode(address addr, char* buf, int buflen, int* offset, const void* base) { | |
| 115 assert(_shared_decoder_lock != NULL, "Just check"); | |
| 116 bool error_handling_thread = os::current_thread_id() == VMError::first_error_tid; | |
| 117 MutexLockerEx locker(error_handling_thread ? NULL : _shared_decoder_lock, true); | |
| 118 AbstractDecoder* decoder = error_handling_thread ? | |
| 119 get_error_handler_instance(): get_shared_instance(); | |
| 120 assert(decoder != NULL, "null decoder"); | |
| 121 | |
| 122 return decoder->decode(addr, buf, buflen, offset, base); | |
| 123 } | |
| 124 | |
| 125 | |
| 126 bool Decoder::demangle(const char* symbol, char* buf, int buflen) { | |
| 127 assert(_shared_decoder_lock != NULL, "Just check"); | |
| 128 bool error_handling_thread = os::current_thread_id() == VMError::first_error_tid; | |
| 129 MutexLockerEx locker(error_handling_thread ? NULL : _shared_decoder_lock, true); | |
| 130 AbstractDecoder* decoder = error_handling_thread ? | |
| 131 get_error_handler_instance(): get_shared_instance(); | |
| 132 assert(decoder != NULL, "null decoder"); | |
| 133 return decoder->demangle(symbol, buf, buflen); | |
| 134 } | |
| 135 | |
| 136 bool Decoder::can_decode_C_frame_in_vm() { | |
| 137 assert(_shared_decoder_lock != NULL, "Just check"); | |
| 138 bool error_handling_thread = os::current_thread_id() == VMError::first_error_tid; | |
| 139 MutexLockerEx locker(error_handling_thread ? NULL : _shared_decoder_lock, true); | |
| 140 AbstractDecoder* decoder = error_handling_thread ? | |
| 141 get_error_handler_instance(): get_shared_instance(); | |
| 142 assert(decoder != NULL, "null decoder"); | |
| 143 return decoder->can_decode_C_frame_in_vm(); | |
| 144 } | |
| 145 | |
| 146 /* | |
| 147 * Shutdown shared decoder and replace it with | |
| 148 * _do_nothing_decoder. Do nothing with error handler | |
| 149 * instance, since the JVM is going down. | |
| 150 */ | |
| 151 void Decoder::shutdown() { | |
| 152 assert(_shared_decoder_lock != NULL, "Just check"); | |
| 153 MutexLockerEx locker(_shared_decoder_lock, true); | |
| 154 | |
| 155 if (_shared_decoder != NULL && | |
| 156 _shared_decoder != &_do_nothing_decoder) { | |
| 157 delete _shared_decoder; | |
| 158 } | |
| 159 | |
| 160 _shared_decoder = &_do_nothing_decoder; | |
| 161 } | |
| 162 |
