Mercurial > hg > truffle
annotate src/os/windows/vm/decoder_windows.cpp @ 4550:e065aa86d077
Lower NormalizeCompareNode in the front end to avoid LIR operation.
author | Christian Wimmer <Christian.Wimmer@Oracle.com> |
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date | Thu, 09 Feb 2012 17:37:53 -0800 |
parents | 5def270bc147 |
children | d7e3846464d0 |
rev | line source |
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1 /* |
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2 * Copyright (c) 1997, 2010, 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 #include "precompiled.hpp" |
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26 #include "prims/jvm.h" |
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27 #include "runtime/os.hpp" |
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28 #include "utilities/decoder.hpp" |
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29 |
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30 HMODULE Decoder::_dbghelp_handle = NULL; |
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31 bool Decoder::_can_decode_in_vm = false; |
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32 pfn_SymGetSymFromAddr64 Decoder::_pfnSymGetSymFromAddr64 = NULL; |
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33 pfn_UndecorateSymbolName Decoder::_pfnUndecorateSymbolName = NULL; |
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34 |
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35 void Decoder::initialize() { |
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36 if (!_initialized) { |
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37 _initialized = true; |
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38 |
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39 HINSTANCE handle = os::win32::load_Windows_dll("dbghelp.dll", NULL, 0); |
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40 if (!handle) { |
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41 _decoder_status = helper_not_found; |
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42 return; |
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43 } |
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44 |
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45 _dbghelp_handle = handle; |
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46 |
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47 pfn_SymSetOptions _pfnSymSetOptions = (pfn_SymSetOptions)::GetProcAddress(handle, "SymSetOptions"); |
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48 pfn_SymInitialize _pfnSymInitialize = (pfn_SymInitialize)::GetProcAddress(handle, "SymInitialize"); |
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49 _pfnSymGetSymFromAddr64 = (pfn_SymGetSymFromAddr64)::GetProcAddress(handle, "SymGetSymFromAddr64"); |
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50 _pfnUndecorateSymbolName = (pfn_UndecorateSymbolName)GetProcAddress(handle, "UnDecorateSymbolName"); |
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51 |
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52 if (_pfnSymSetOptions == NULL || _pfnSymInitialize == NULL || _pfnSymGetSymFromAddr64 == NULL) { |
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53 _pfnSymGetSymFromAddr64 = NULL; |
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54 _pfnUndecorateSymbolName = NULL; |
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55 ::FreeLibrary(handle); |
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56 _dbghelp_handle = NULL; |
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57 _decoder_status = helper_func_error; |
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58 return; |
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59 } |
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60 |
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61 _pfnSymSetOptions(SYMOPT_UNDNAME | SYMOPT_DEFERRED_LOADS); |
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62 if (!_pfnSymInitialize(GetCurrentProcess(), NULL, TRUE)) { |
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63 _pfnSymGetSymFromAddr64 = NULL; |
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64 _pfnUndecorateSymbolName = NULL; |
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65 ::FreeLibrary(handle); |
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66 _dbghelp_handle = NULL; |
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67 _decoder_status = helper_init_error; |
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68 return; |
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69 } |
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70 |
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71 // find out if jvm.dll contains private symbols, by decoding |
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72 // current function and comparing the result |
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73 address addr = (address)Decoder::initialize; |
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74 char buf[MAX_PATH]; |
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75 if (decode(addr, buf, sizeof(buf), NULL) == no_error) { |
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76 _can_decode_in_vm = !strcmp(buf, "Decoder::initialize"); |
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77 } |
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78 } |
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79 } |
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80 |
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81 void Decoder::uninitialize() { |
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82 assert(_initialized, "Decoder not yet initialized"); |
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83 _pfnSymGetSymFromAddr64 = NULL; |
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84 _pfnUndecorateSymbolName = NULL; |
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85 if (_dbghelp_handle != NULL) { |
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86 ::FreeLibrary(_dbghelp_handle); |
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87 } |
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88 _initialized = false; |
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89 } |
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90 |
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91 bool Decoder::can_decode_C_frame_in_vm() { |
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92 initialize(); |
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93 return _can_decode_in_vm; |
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94 } |
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95 |
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96 |
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97 Decoder::decoder_status Decoder::decode(address addr, char *buf, int buflen, int *offset) { |
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98 assert(_initialized, "Decoder not yet initialized"); |
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99 if (_pfnSymGetSymFromAddr64 != NULL) { |
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100 PIMAGEHLP_SYMBOL64 pSymbol; |
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101 char symbolInfo[MAX_PATH + sizeof(IMAGEHLP_SYMBOL64)]; |
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102 pSymbol = (PIMAGEHLP_SYMBOL64)symbolInfo; |
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103 pSymbol->MaxNameLength = MAX_PATH; |
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104 pSymbol->SizeOfStruct = sizeof(IMAGEHLP_SYMBOL64); |
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105 DWORD64 displacement; |
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106 if (_pfnSymGetSymFromAddr64(::GetCurrentProcess(), (DWORD64)addr, &displacement, pSymbol)) { |
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107 if (buf != NULL) { |
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108 if (!demangle(pSymbol->Name, buf, buflen)) { |
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109 jio_snprintf(buf, buflen, "%s", pSymbol->Name); |
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110 } |
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111 } |
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112 if (offset != NULL) *offset = (int)displacement; |
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113 return no_error; |
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114 } |
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115 } |
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116 return helper_not_found; |
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117 } |
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118 |
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119 bool Decoder::demangle(const char* symbol, char *buf, int buflen) { |
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120 assert(_initialized, "Decoder not yet initialized"); |
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121 return _pfnUndecorateSymbolName != NULL && |
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122 _pfnUndecorateSymbolName(symbol, buf, buflen, UNDNAME_COMPLETE); |
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123 } |
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124 |