Tue, 24 Jul 2018 13:22:11 +0800
#7048 added Loongson release info to hs_err crash files
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 | |
aoqi@0 | 26 | #ifndef SHARE_VM_UTILITIES_DECODER_HPP |
aoqi@0 | 27 | #define SHARE_VM_UTILITIES_DECODER_HPP |
aoqi@0 | 28 | |
aoqi@0 | 29 | #include "memory/allocation.hpp" |
aoqi@0 | 30 | #include "runtime/mutex.hpp" |
aoqi@0 | 31 | #include "runtime/mutexLocker.hpp" |
aoqi@0 | 32 | |
aoqi@0 | 33 | class AbstractDecoder : public CHeapObj<mtInternal> { |
aoqi@0 | 34 | public: |
aoqi@0 | 35 | // status code for decoding native C frame |
aoqi@0 | 36 | enum decoder_status { |
aoqi@0 | 37 | not_available = -10, // real decoder is not available |
aoqi@0 | 38 | no_error = 0, // successfully decoded frames |
aoqi@0 | 39 | out_of_memory, // out of memory |
aoqi@0 | 40 | file_invalid, // invalid elf file |
aoqi@0 | 41 | file_not_found, // could not found symbol file (on windows), such as jvm.pdb or jvm.map |
aoqi@0 | 42 | helper_not_found, // could not load dbghelp.dll (Windows only) |
aoqi@0 | 43 | helper_func_error, // decoding functions not found (Windows only) |
aoqi@0 | 44 | helper_init_error // SymInitialize failed (Windows only) |
aoqi@0 | 45 | }; |
aoqi@0 | 46 | |
aoqi@0 | 47 | // decode an pc address to corresponding function name and an offset from the beginning of |
aoqi@0 | 48 | // the function |
aoqi@0 | 49 | virtual bool decode(address pc, char* buf, int buflen, int* offset, |
aoqi@0 | 50 | const char* modulepath = NULL) = 0; |
aoqi@0 | 51 | virtual bool decode(address pc, char* buf, int buflen, int* offset, const void* base) = 0; |
aoqi@0 | 52 | |
aoqi@0 | 53 | // demangle a C++ symbol |
aoqi@0 | 54 | virtual bool demangle(const char* symbol, char* buf, int buflen) = 0; |
aoqi@0 | 55 | // if the decoder can decode symbols in vm |
aoqi@0 | 56 | virtual bool can_decode_C_frame_in_vm() const = 0; |
aoqi@0 | 57 | |
aoqi@0 | 58 | virtual decoder_status status() const { |
aoqi@0 | 59 | return _decoder_status; |
aoqi@0 | 60 | } |
aoqi@0 | 61 | |
aoqi@0 | 62 | virtual bool has_error() const { |
aoqi@0 | 63 | return is_error(_decoder_status); |
aoqi@0 | 64 | } |
aoqi@0 | 65 | |
aoqi@0 | 66 | static bool is_error(decoder_status status) { |
aoqi@0 | 67 | return (status > 0); |
aoqi@0 | 68 | } |
aoqi@0 | 69 | |
aoqi@0 | 70 | protected: |
aoqi@0 | 71 | decoder_status _decoder_status; |
aoqi@0 | 72 | }; |
aoqi@0 | 73 | |
aoqi@0 | 74 | // Do nothing decoder |
aoqi@0 | 75 | class NullDecoder : public AbstractDecoder { |
aoqi@0 | 76 | public: |
aoqi@0 | 77 | NullDecoder() { |
aoqi@0 | 78 | _decoder_status = not_available; |
aoqi@0 | 79 | } |
aoqi@0 | 80 | |
aoqi@0 | 81 | ~NullDecoder() {}; |
aoqi@0 | 82 | |
aoqi@0 | 83 | virtual bool decode(address pc, char* buf, int buflen, int* offset, |
aoqi@0 | 84 | const char* modulepath = NULL) { |
aoqi@0 | 85 | return false; |
aoqi@0 | 86 | } |
aoqi@0 | 87 | |
aoqi@0 | 88 | virtual bool decode(address pc, char* buf, int buflen, int* offset, const void* base) { |
aoqi@0 | 89 | return false; |
aoqi@0 | 90 | } |
aoqi@0 | 91 | |
aoqi@0 | 92 | virtual bool demangle(const char* symbol, char* buf, int buflen) { |
aoqi@0 | 93 | return false; |
aoqi@0 | 94 | } |
aoqi@0 | 95 | |
aoqi@0 | 96 | virtual bool can_decode_C_frame_in_vm() const { |
aoqi@0 | 97 | return false; |
aoqi@0 | 98 | } |
aoqi@0 | 99 | }; |
aoqi@0 | 100 | |
aoqi@0 | 101 | |
aoqi@0 | 102 | class Decoder : AllStatic { |
aoqi@0 | 103 | public: |
aoqi@0 | 104 | static bool decode(address pc, char* buf, int buflen, int* offset, const char* modulepath = NULL); |
aoqi@0 | 105 | static bool decode(address pc, char* buf, int buflen, int* offset, const void* base); |
aoqi@0 | 106 | static bool demangle(const char* symbol, char* buf, int buflen); |
aoqi@0 | 107 | static bool can_decode_C_frame_in_vm(); |
aoqi@0 | 108 | |
aoqi@0 | 109 | // shutdown shared instance |
aoqi@0 | 110 | static void shutdown(); |
aoqi@0 | 111 | protected: |
aoqi@0 | 112 | // shared decoder instance, _shared_instance_lock is needed |
aoqi@0 | 113 | static AbstractDecoder* get_shared_instance(); |
aoqi@0 | 114 | // a private instance for error handler. Error handler can be |
aoqi@0 | 115 | // triggered almost everywhere, including signal handler, where |
aoqi@0 | 116 | // no lock can be taken. So the shared decoder can not be used |
aoqi@0 | 117 | // in this scenario. |
aoqi@0 | 118 | static AbstractDecoder* get_error_handler_instance(); |
aoqi@0 | 119 | |
aoqi@0 | 120 | static AbstractDecoder* create_decoder(); |
aoqi@0 | 121 | private: |
aoqi@0 | 122 | static AbstractDecoder* _shared_decoder; |
aoqi@0 | 123 | static AbstractDecoder* _error_handler_decoder; |
aoqi@0 | 124 | static NullDecoder _do_nothing_decoder; |
aoqi@0 | 125 | |
aoqi@0 | 126 | protected: |
aoqi@0 | 127 | static Mutex* _shared_decoder_lock; |
aoqi@0 | 128 | static Mutex* shared_decoder_lock(); |
aoqi@0 | 129 | |
aoqi@0 | 130 | friend class DecoderLocker; |
aoqi@0 | 131 | }; |
aoqi@0 | 132 | |
aoqi@0 | 133 | class DecoderLocker : public MutexLockerEx { |
aoqi@0 | 134 | AbstractDecoder* _decoder; |
aoqi@0 | 135 | inline bool is_first_error_thread(); |
aoqi@0 | 136 | public: |
aoqi@0 | 137 | DecoderLocker(); |
aoqi@0 | 138 | AbstractDecoder* decoder() { |
aoqi@0 | 139 | return _decoder; |
aoqi@0 | 140 | } |
aoqi@0 | 141 | }; |
aoqi@0 | 142 | |
aoqi@0 | 143 | #endif // SHARE_VM_UTILITIES_DECODER_HPP |