Mercurial > hg > truffle
annotate src/share/vm/utilities/decoder.hpp @ 8733:9def4075da6d
8008079: G1: Add nextObject routine to CMBitMapRO and replace nextWord
Summary: Update the task local finger to the start of the next object when marking aborts, in order to avoid the redundant scanning of all 0's when the marking task restarts, if otherwise updating to the next word. In addition, reuse the routine nextObject() in routine iterate().
Reviewed-by: johnc, ysr
Contributed-by: tamao <tao.mao@oracle.com>
| author | tamao |
|---|---|
| date | Tue, 05 Mar 2013 15:36:56 -0800 |
| parents | 3b01d0321dfa |
| children | 38f750491293 |
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1 /* |
| 4917 | 2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 * |
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23 */ |
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24 |
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25 |
| 4803 | 26 #ifndef SHARE_VM_UTILITIES_DECODER_HPP |
| 27 #define SHARE_VM_UTILITIES_DECODER_HPP | |
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28 |
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29 #include "memory/allocation.hpp" |
| 4803 | 30 #include "runtime/mutex.hpp" |
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31 |
| 6197 | 32 class AbstractDecoder : public CHeapObj<mtInternal> { |
| 4803 | 33 public: |
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34 // status code for decoding native C frame |
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35 enum decoder_status { |
| 4803 | 36 not_available = -10, // real decoder is not available |
| 37 no_error = 0, // successfully decoded frames | |
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38 out_of_memory, // out of memory |
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39 file_invalid, // invalid elf file |
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40 file_not_found, // could not found symbol file (on windows), such as jvm.pdb or jvm.map |
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41 helper_not_found, // could not load dbghelp.dll (Windows only) |
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42 helper_func_error, // decoding functions not found (Windows only) |
| 4803 | 43 helper_init_error // SymInitialize failed (Windows only) |
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44 }; |
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45 |
| 4917 | 46 // decode an pc address to corresponding function name and an offset from the beginning of |
| 47 // the function | |
| 48 virtual bool decode(address pc, char* buf, int buflen, int* offset, | |
| 49 const char* modulepath = NULL) = 0; | |
| 6258 | 50 virtual bool decode(address pc, char* buf, int buflen, int* offset, const void* base) = 0; |
| 51 | |
| 4917 | 52 // demangle a C++ symbol |
| 53 virtual bool demangle(const char* symbol, char* buf, int buflen) = 0; | |
| 54 // if the decoder can decode symbols in vm | |
| 55 virtual bool can_decode_C_frame_in_vm() const = 0; | |
| 56 | |
| 57 virtual decoder_status status() const { | |
| 58 return _decoder_status; | |
| 59 } | |
| 60 | |
| 61 virtual bool has_error() const { | |
| 62 return is_error(_decoder_status); | |
| 63 } | |
| 64 | |
| 65 static bool is_error(decoder_status status) { | |
| 66 return (status > 0); | |
| 67 } | |
| 68 | |
| 69 protected: | |
| 70 decoder_status _decoder_status; | |
| 71 }; | |
| 72 | |
| 73 // Do nothing decoder | |
| 74 class NullDecoder : public AbstractDecoder { | |
| 75 public: | |
| 4803 | 76 NullDecoder() { |
| 77 _decoder_status = not_available; | |
| 78 } | |
| 79 | |
| 80 ~NullDecoder() {}; | |
| 81 | |
| 82 virtual bool decode(address pc, char* buf, int buflen, int* offset, | |
| 83 const char* modulepath = NULL) { | |
| 84 return false; | |
| 85 } | |
| 86 | |
| 6258 | 87 virtual bool decode(address pc, char* buf, int buflen, int* offset, const void* base) { |
| 88 return false; | |
| 89 } | |
| 90 | |
| 4803 | 91 virtual bool demangle(const char* symbol, char* buf, int buflen) { |
| 92 return false; | |
| 93 } | |
| 94 | |
| 95 virtual bool can_decode_C_frame_in_vm() const { | |
| 96 return false; | |
| 97 } | |
| 98 }; | |
| 99 | |
| 100 | |
| 4917 | 101 class Decoder : AllStatic { |
| 4803 | 102 public: |
| 103 static bool decode(address pc, char* buf, int buflen, int* offset, const char* modulepath = NULL); | |
| 6258 | 104 static bool decode(address pc, char* buf, int buflen, int* offset, const void* base); |
| 4803 | 105 static bool demangle(const char* symbol, char* buf, int buflen); |
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106 static bool can_decode_C_frame_in_vm(); |
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107 |
| 4917 | 108 // shutdown shared instance |
| 4803 | 109 static void shutdown(); |
| 110 protected: | |
| 4917 | 111 // shared decoder instance, _shared_instance_lock is needed |
| 112 static AbstractDecoder* get_shared_instance(); | |
| 113 // a private instance for error handler. Error handler can be | |
| 114 // triggered almost everywhere, including signal handler, where | |
| 115 // no lock can be taken. So the shared decoder can not be used | |
| 116 // in this scenario. | |
| 117 static AbstractDecoder* get_error_handler_instance(); | |
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118 |
| 4917 | 119 static AbstractDecoder* create_decoder(); |
| 4803 | 120 private: |
| 4917 | 121 static AbstractDecoder* _shared_decoder; |
| 122 static AbstractDecoder* _error_handler_decoder; | |
| 123 static NullDecoder _do_nothing_decoder; | |
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124 |
| 4803 | 125 protected: |
| 4917 | 126 static Mutex* _shared_decoder_lock; |
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127 }; |
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128 |
| 4803 | 129 #endif // SHARE_VM_UTILITIES_DECODER_HPP |