Wed, 03 Jul 2019 20:42:37 +0800
Merge
aoqi@0 | 1 | /* |
aoqi@0 | 2 | * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 4 | * |
aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 7 | * published by the Free Software Foundation. |
aoqi@0 | 8 | * |
aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 13 | * accompanied this code). |
aoqi@0 | 14 | * |
aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 18 | * |
aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 21 | * questions. |
aoqi@0 | 22 | * |
aoqi@0 | 23 | */ |
aoqi@0 | 24 | |
aoqi@0 | 25 | #include "precompiled.hpp" |
aoqi@0 | 26 | #include "prims/jvm.h" |
aoqi@0 | 27 | #include "runtime/os.hpp" |
aoqi@0 | 28 | #include "utilities/decoder.hpp" |
aoqi@0 | 29 | #include "utilities/vmError.hpp" |
aoqi@0 | 30 | |
aoqi@0 | 31 | #if defined(_WINDOWS) |
aoqi@0 | 32 | #include "decoder_windows.hpp" |
aoqi@0 | 33 | #elif defined(__APPLE__) |
aoqi@0 | 34 | #include "decoder_machO.hpp" |
aoqi@0 | 35 | #elif defined(AIX) |
aoqi@0 | 36 | #include "decoder_aix.hpp" |
aoqi@0 | 37 | #else |
aoqi@0 | 38 | #include "decoder_elf.hpp" |
aoqi@0 | 39 | #endif |
aoqi@0 | 40 | |
aoqi@0 | 41 | AbstractDecoder* Decoder::_shared_decoder = NULL; |
aoqi@0 | 42 | AbstractDecoder* Decoder::_error_handler_decoder = NULL; |
aoqi@0 | 43 | NullDecoder Decoder::_do_nothing_decoder; |
aoqi@0 | 44 | Mutex* Decoder::_shared_decoder_lock = new Mutex(Mutex::native, |
aoqi@0 | 45 | "SharedDecoderLock"); |
aoqi@0 | 46 | |
aoqi@0 | 47 | AbstractDecoder* Decoder::get_shared_instance() { |
aoqi@0 | 48 | assert(_shared_decoder_lock != NULL && _shared_decoder_lock->owned_by_self(), |
aoqi@0 | 49 | "Require DecoderLock to enter"); |
aoqi@0 | 50 | |
aoqi@0 | 51 | if (_shared_decoder == NULL) { |
aoqi@0 | 52 | _shared_decoder = create_decoder(); |
aoqi@0 | 53 | } |
aoqi@0 | 54 | return _shared_decoder; |
aoqi@0 | 55 | } |
aoqi@0 | 56 | |
aoqi@0 | 57 | AbstractDecoder* Decoder::get_error_handler_instance() { |
aoqi@0 | 58 | if (_error_handler_decoder == NULL) { |
aoqi@0 | 59 | _error_handler_decoder = create_decoder(); |
aoqi@0 | 60 | } |
aoqi@0 | 61 | return _error_handler_decoder; |
aoqi@0 | 62 | } |
aoqi@0 | 63 | |
aoqi@0 | 64 | |
aoqi@0 | 65 | AbstractDecoder* Decoder::create_decoder() { |
aoqi@0 | 66 | AbstractDecoder* decoder; |
aoqi@0 | 67 | #if defined(_WINDOWS) |
aoqi@0 | 68 | decoder = new (std::nothrow) WindowsDecoder(); |
aoqi@0 | 69 | #elif defined (__APPLE__) |
aoqi@0 | 70 | decoder = new (std::nothrow)MachODecoder(); |
aoqi@0 | 71 | #elif defined(AIX) |
aoqi@0 | 72 | decoder = new (std::nothrow)AIXDecoder(); |
aoqi@0 | 73 | #else |
aoqi@0 | 74 | decoder = new (std::nothrow)ElfDecoder(); |
aoqi@0 | 75 | #endif |
aoqi@0 | 76 | |
aoqi@0 | 77 | if (decoder == NULL || decoder->has_error()) { |
aoqi@0 | 78 | if (decoder != NULL) { |
aoqi@0 | 79 | delete decoder; |
aoqi@0 | 80 | } |
aoqi@0 | 81 | decoder = &_do_nothing_decoder; |
aoqi@0 | 82 | } |
aoqi@0 | 83 | return decoder; |
aoqi@0 | 84 | } |
aoqi@0 | 85 | |
aoqi@0 | 86 | inline bool DecoderLocker::is_first_error_thread() { |
aoqi@0 | 87 | return (os::current_thread_id() == VMError::get_first_error_tid()); |
aoqi@0 | 88 | } |
aoqi@0 | 89 | |
aoqi@0 | 90 | DecoderLocker::DecoderLocker() : |
aoqi@0 | 91 | MutexLockerEx(DecoderLocker::is_first_error_thread() ? |
aoqi@0 | 92 | NULL : Decoder::shared_decoder_lock(), true) { |
aoqi@0 | 93 | _decoder = is_first_error_thread() ? |
aoqi@0 | 94 | Decoder::get_error_handler_instance() : Decoder::get_shared_instance(); |
aoqi@0 | 95 | assert(_decoder != NULL, "null decoder"); |
aoqi@0 | 96 | } |
aoqi@0 | 97 | |
aoqi@0 | 98 | Mutex* Decoder::shared_decoder_lock() { |
aoqi@0 | 99 | assert(_shared_decoder_lock != NULL, "Just check"); |
aoqi@0 | 100 | return _shared_decoder_lock; |
aoqi@0 | 101 | } |
aoqi@0 | 102 | |
aoqi@0 | 103 | bool Decoder::decode(address addr, char* buf, int buflen, int* offset, const char* modulepath) { |
aoqi@0 | 104 | assert(_shared_decoder_lock != NULL, "Just check"); |
aoqi@0 | 105 | bool error_handling_thread = os::current_thread_id() == VMError::first_error_tid; |
aoqi@0 | 106 | MutexLockerEx locker(error_handling_thread ? NULL : _shared_decoder_lock, true); |
aoqi@0 | 107 | AbstractDecoder* decoder = error_handling_thread ? |
aoqi@0 | 108 | get_error_handler_instance(): get_shared_instance(); |
aoqi@0 | 109 | assert(decoder != NULL, "null decoder"); |
aoqi@0 | 110 | |
aoqi@0 | 111 | return decoder->decode(addr, buf, buflen, offset, modulepath); |
aoqi@0 | 112 | } |
aoqi@0 | 113 | |
aoqi@0 | 114 | bool Decoder::decode(address addr, char* buf, int buflen, int* offset, const void* base) { |
aoqi@0 | 115 | assert(_shared_decoder_lock != NULL, "Just check"); |
aoqi@0 | 116 | bool error_handling_thread = os::current_thread_id() == VMError::first_error_tid; |
aoqi@0 | 117 | MutexLockerEx locker(error_handling_thread ? NULL : _shared_decoder_lock, true); |
aoqi@0 | 118 | AbstractDecoder* decoder = error_handling_thread ? |
aoqi@0 | 119 | get_error_handler_instance(): get_shared_instance(); |
aoqi@0 | 120 | assert(decoder != NULL, "null decoder"); |
aoqi@0 | 121 | |
aoqi@0 | 122 | return decoder->decode(addr, buf, buflen, offset, base); |
aoqi@0 | 123 | } |
aoqi@0 | 124 | |
aoqi@0 | 125 | |
aoqi@0 | 126 | bool Decoder::demangle(const char* symbol, char* buf, int buflen) { |
aoqi@0 | 127 | assert(_shared_decoder_lock != NULL, "Just check"); |
aoqi@0 | 128 | bool error_handling_thread = os::current_thread_id() == VMError::first_error_tid; |
aoqi@0 | 129 | MutexLockerEx locker(error_handling_thread ? NULL : _shared_decoder_lock, true); |
aoqi@0 | 130 | AbstractDecoder* decoder = error_handling_thread ? |
aoqi@0 | 131 | get_error_handler_instance(): get_shared_instance(); |
aoqi@0 | 132 | assert(decoder != NULL, "null decoder"); |
aoqi@0 | 133 | return decoder->demangle(symbol, buf, buflen); |
aoqi@0 | 134 | } |
aoqi@0 | 135 | |
aoqi@0 | 136 | bool Decoder::can_decode_C_frame_in_vm() { |
aoqi@0 | 137 | assert(_shared_decoder_lock != NULL, "Just check"); |
aoqi@0 | 138 | bool error_handling_thread = os::current_thread_id() == VMError::first_error_tid; |
aoqi@0 | 139 | MutexLockerEx locker(error_handling_thread ? NULL : _shared_decoder_lock, true); |
aoqi@0 | 140 | AbstractDecoder* decoder = error_handling_thread ? |
aoqi@0 | 141 | get_error_handler_instance(): get_shared_instance(); |
aoqi@0 | 142 | assert(decoder != NULL, "null decoder"); |
aoqi@0 | 143 | return decoder->can_decode_C_frame_in_vm(); |
aoqi@0 | 144 | } |
aoqi@0 | 145 | |
aoqi@0 | 146 | /* |
aoqi@0 | 147 | * Shutdown shared decoder and replace it with |
aoqi@0 | 148 | * _do_nothing_decoder. Do nothing with error handler |
aoqi@0 | 149 | * instance, since the JVM is going down. |
aoqi@0 | 150 | */ |
aoqi@0 | 151 | void Decoder::shutdown() { |
aoqi@0 | 152 | assert(_shared_decoder_lock != NULL, "Just check"); |
aoqi@0 | 153 | MutexLockerEx locker(_shared_decoder_lock, true); |
aoqi@0 | 154 | |
aoqi@0 | 155 | if (_shared_decoder != NULL && |
aoqi@0 | 156 | _shared_decoder != &_do_nothing_decoder) { |
aoqi@0 | 157 | delete _shared_decoder; |
aoqi@0 | 158 | } |
aoqi@0 | 159 | |
aoqi@0 | 160 | _shared_decoder = &_do_nothing_decoder; |
aoqi@0 | 161 | } |
aoqi@0 | 162 |