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annotate src/os/windows/vm/decoder_windows.cpp @ 7580:dd7248d3e151

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7152671: RFE: Windows decoder should add some std dirs to the symbol search path Summary: Added JRE/JDK bin directories to decoder's symbol search path Reviewed-by: dcubed, sla
author zgu
date Wed, 09 Jan 2013 14:46:55 -0500
parents b9a9ed0f8eeb
children 63e54c37ac64
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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
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project)
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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
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project)
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project)
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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 "decoder_windows.hpp"
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28
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29 WindowsDecoder::WindowsDecoder() {
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30 _dbghelp_handle = NULL;
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31 _can_decode_in_vm = false;
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32 _pfnSymGetSymFromAddr64 = NULL;
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33 _pfnUndecorateSymbolName = NULL;
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34
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35 _decoder_status = no_error;
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36 initialize();
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37 }
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38
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39 void WindowsDecoder::initialize() {
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40 if (!has_error() && _dbghelp_handle == NULL) {
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41 HMODULE handle = ::LoadLibrary("dbghelp.dll");
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42 if (!handle) {
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43 _decoder_status = helper_not_found;
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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
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147 address addr = (address)Decoder::demangle;
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148 char buf[MAX_PATH];
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149 if (decode(addr, buf, sizeof(buf), NULL)) {
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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
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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 }
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161 _dbghelp_handle = NULL;
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162 }
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163
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164 bool WindowsDecoder::can_decode_C_frame_in_vm() const {
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165 return (!has_error() && _can_decode_in_vm);
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166 }
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167
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168
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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) {
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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 }
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183 if(offset != NULL) *offset = (int)displacement;
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184 return true;
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185 }
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186 }
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187 if (buf != NULL && buflen > 0) buf[0] = '\0';
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188 if (offset != NULL) *offset = -1;
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189 return false;
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190 }
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191
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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