Mercurial > hg > truffle
annotate src/os/windows/vm/decoder_windows.cpp @ 8162:da10229e5a33
Experiment with new LSRA block order.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Fri, 08 Mar 2013 11:23:28 +0100 |
parents | dd7248d3e151 |
children | 63e54c37ac64 |
rev | line source |
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1 /* |
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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 #include "precompiled.hpp" |
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26 #include "prims/jvm.h" |
4803 | 27 #include "decoder_windows.hpp" |
28 | |
29 WindowsDecoder::WindowsDecoder() { | |
30 _dbghelp_handle = NULL; | |
31 _can_decode_in_vm = false; | |
32 _pfnSymGetSymFromAddr64 = NULL; | |
33 _pfnUndecorateSymbolName = NULL; | |
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34 |
4803 | 35 _decoder_status = no_error; |
36 initialize(); | |
37 } | |
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38 |
4803 | 39 void WindowsDecoder::initialize() { |
40 if (!has_error() && _dbghelp_handle == NULL) { | |
41 HMODULE handle = ::LoadLibrary("dbghelp.dll"); | |
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42 if (!handle) { |
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43 _decoder_status = helper_not_found; |
4803 | 44 return; |
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45 } |
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46 |
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47 _dbghelp_handle = handle; |
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48 |
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49 pfn_SymSetOptions _pfnSymSetOptions = (pfn_SymSetOptions)::GetProcAddress(handle, "SymSetOptions"); |
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50 pfn_SymInitialize _pfnSymInitialize = (pfn_SymInitialize)::GetProcAddress(handle, "SymInitialize"); |
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51 _pfnSymGetSymFromAddr64 = (pfn_SymGetSymFromAddr64)::GetProcAddress(handle, "SymGetSymFromAddr64"); |
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52 _pfnUndecorateSymbolName = (pfn_UndecorateSymbolName)::GetProcAddress(handle, "UnDecorateSymbolName"); |
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53 |
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54 if (_pfnSymSetOptions == NULL || _pfnSymInitialize == NULL || _pfnSymGetSymFromAddr64 == NULL) { |
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55 _pfnSymGetSymFromAddr64 = NULL; |
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56 _pfnUndecorateSymbolName = NULL; |
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57 ::FreeLibrary(handle); |
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58 _dbghelp_handle = NULL; |
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59 _decoder_status = helper_func_error; |
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60 return; |
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61 } |
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62 |
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63 HANDLE hProcess = ::GetCurrentProcess(); |
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64 _pfnSymSetOptions(SYMOPT_UNDNAME | SYMOPT_DEFERRED_LOADS | SYMOPT_EXACT_SYMBOLS); |
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65 if (!_pfnSymInitialize(hProcess, NULL, TRUE)) { |
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66 _pfnSymGetSymFromAddr64 = NULL; |
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67 _pfnUndecorateSymbolName = NULL; |
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68 ::FreeLibrary(handle); |
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69 _dbghelp_handle = NULL; |
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70 _decoder_status = helper_init_error; |
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71 return; |
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72 } |
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73 |
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74 // set pdb search paths |
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75 pfn_SymSetSearchPath _pfn_SymSetSearchPath = |
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76 (pfn_SymSetSearchPath)::GetProcAddress(handle, "SymSetSearchPath"); |
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77 pfn_SymGetSearchPath _pfn_SymGetSearchPath = |
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78 (pfn_SymGetSearchPath)::GetProcAddress(handle, "SymGetSearchPath"); |
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79 if (_pfn_SymSetSearchPath != NULL && _pfn_SymGetSearchPath != NULL) { |
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80 char paths[MAX_PATH]; |
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81 int len = sizeof(paths); |
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82 if (!_pfn_SymGetSearchPath(hProcess, paths, len)) { |
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83 paths[0] = '\0'; |
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84 } else { |
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85 // available spaces in path buffer |
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86 len -= (int)strlen(paths); |
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87 } |
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88 |
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89 char tmp_path[MAX_PATH]; |
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90 DWORD dwSize; |
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91 HMODULE hJVM = ::GetModuleHandle("jvm.dll"); |
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92 tmp_path[0] = '\0'; |
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93 // append the path where jvm.dll is located |
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94 if (hJVM != NULL && (dwSize = ::GetModuleFileName(hJVM, tmp_path, sizeof(tmp_path))) > 0) { |
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95 while (dwSize > 0 && tmp_path[dwSize] != '\\') { |
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96 dwSize --; |
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97 } |
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98 |
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99 tmp_path[dwSize] = '\0'; |
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100 |
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101 if (dwSize > 0 && len > (int)dwSize + 1) { |
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102 strncat(paths, os::path_separator(), 1); |
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103 strncat(paths, tmp_path, dwSize); |
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104 len -= dwSize + 1; |
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105 } |
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106 } |
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107 |
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108 // append $JRE/bin. Arguments::get_java_home actually returns $JRE |
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109 // path |
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110 char *p = Arguments::get_java_home(); |
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111 assert(p != NULL, "empty java home"); |
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112 size_t java_home_len = strlen(p); |
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113 if (len > (int)java_home_len + 5) { |
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114 strncat(paths, os::path_separator(), 1); |
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115 strncat(paths, p, java_home_len); |
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116 strncat(paths, "\\bin", 4); |
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117 len -= (int)(java_home_len + 5); |
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118 } |
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119 |
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120 // append $JDK/bin path if it exists |
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121 assert(java_home_len < MAX_PATH, "Invalid path length"); |
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122 // assume $JRE is under $JDK, construct $JDK/bin path and |
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123 // see if it exists or not |
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124 if (strncmp(&p[java_home_len - 3], "jre", 3) == 0) { |
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125 strncpy(tmp_path, p, java_home_len - 3); |
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126 tmp_path[java_home_len - 3] = '\0'; |
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127 strncat(tmp_path, "bin", 3); |
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128 |
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129 // if the directory exists |
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130 DWORD dwAttrib = GetFileAttributes(tmp_path); |
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131 if (dwAttrib != INVALID_FILE_ATTRIBUTES && |
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132 (dwAttrib & FILE_ATTRIBUTE_DIRECTORY)) { |
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133 // tmp_path should have the same length as java_home_len, since we only |
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134 // replaced 'jre' with 'bin' |
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135 if (len > (int)java_home_len + 1) { |
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136 strncat(paths, os::path_separator(), 1); |
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137 strncat(paths, tmp_path, java_home_len); |
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138 } |
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139 } |
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140 } |
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141 |
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142 _pfn_SymSetSearchPath(hProcess, paths); |
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143 } |
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144 |
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145 // find out if jvm.dll contains private symbols, by decoding |
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146 // current function and comparing the result |
6258 | 147 address addr = (address)Decoder::demangle; |
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148 char buf[MAX_PATH]; |
4803 | 149 if (decode(addr, buf, sizeof(buf), NULL)) { |
6258 | 150 _can_decode_in_vm = !strcmp(buf, "Decoder::demangle"); |
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151 } |
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152 } |
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153 } |
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154 |
4803 | 155 void WindowsDecoder::uninitialize() { |
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156 _pfnSymGetSymFromAddr64 = NULL; |
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157 _pfnUndecorateSymbolName = NULL; |
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158 if (_dbghelp_handle != NULL) { |
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159 ::FreeLibrary(_dbghelp_handle); |
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160 } |
4803 | 161 _dbghelp_handle = NULL; |
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162 } |
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163 |
4803 | 164 bool WindowsDecoder::can_decode_C_frame_in_vm() const { |
165 return (!has_error() && _can_decode_in_vm); | |
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166 } |
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167 |
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168 |
4803 | 169 bool WindowsDecoder::decode(address addr, char *buf, int buflen, int* offset, const char* modulepath) { |
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170 if (_pfnSymGetSymFromAddr64 != NULL) { |
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171 PIMAGEHLP_SYMBOL64 pSymbol; |
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172 char symbolInfo[MAX_PATH + sizeof(IMAGEHLP_SYMBOL64)]; |
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173 pSymbol = (PIMAGEHLP_SYMBOL64)symbolInfo; |
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174 pSymbol->MaxNameLength = MAX_PATH; |
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175 pSymbol->SizeOfStruct = sizeof(IMAGEHLP_SYMBOL64); |
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176 DWORD64 displacement; |
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177 if (_pfnSymGetSymFromAddr64(::GetCurrentProcess(), (DWORD64)addr, &displacement, pSymbol)) { |
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178 if (buf != NULL) { |
4803 | 179 if (demangle(pSymbol->Name, buf, buflen)) { |
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180 jio_snprintf(buf, buflen, "%s", pSymbol->Name); |
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181 } |
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182 } |
4803 | 183 if(offset != NULL) *offset = (int)displacement; |
184 return true; | |
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185 } |
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186 } |
4803 | 187 if (buf != NULL && buflen > 0) buf[0] = '\0'; |
188 if (offset != NULL) *offset = -1; | |
189 return false; | |
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190 } |
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191 |
4803 | 192 bool WindowsDecoder::demangle(const char* symbol, char *buf, int buflen) { |
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193 return _pfnUndecorateSymbolName != NULL && |
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194 _pfnUndecorateSymbolName(symbol, buf, buflen, UNDNAME_COMPLETE); |
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195 } |
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196 |