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1 /*
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2 * Copyright 2001 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 // Disable too-long symbol warnings
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26 #pragma warning ( disable : 4786 )
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27
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28 #include "libInfo.hpp"
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29 #include "nt4internals.hpp"
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30 #include "isNT4.hpp"
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31 #include "toolHelp.hpp"
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32 #include <assert.h>
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33
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34 using namespace std;
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35
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36 typedef void LibInfoImplFunc(DWORD pid, vector<LibInfo>& info);
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37
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38 static void libInfoImplNT4(DWORD pid, vector<LibInfo>& info);
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39 static void libInfoImplToolHelp(DWORD pid, vector<LibInfo>& info);
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40
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41 void
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42 libInfo(DWORD pid, vector<LibInfo>& info) {
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43 static LibInfoImplFunc* impl = NULL;
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44
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45 if (impl == NULL) {
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46 // See which operating system we're on
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47 impl = (isNT4() ? &libInfoImplNT4 : &libInfoImplToolHelp);
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48 }
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49
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50 assert(impl != NULL);
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51
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52 (*impl)(pid, info);
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53 }
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54
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55 static ULONG
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56 ModuleCount(NT4::PDEBUG_BUFFER db) {
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57 return db->ModuleInformation ? *PULONG(db->ModuleInformation) : 0;
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58 }
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59
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60 #define MAX2(a, b) (((a) < (b)) ? (b) : (a))
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61
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62 static void
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63 libInfoImplNT4(DWORD pid, vector<LibInfo>& info) {
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64 static EnumProcessModulesFunc* enumFunc = NULL;
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65 static GetModuleFileNameExFunc* fnFunc = NULL;
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66 static GetModuleInformationFunc* infoFunc = NULL;
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67
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68 if (enumFunc == NULL) {
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69 HMODULE dll = loadPSAPIDLL();
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70
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71 enumFunc = (EnumProcessModulesFunc*) GetProcAddress(dll, "EnumProcessModules");
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72 fnFunc = (GetModuleFileNameExFunc*) GetProcAddress(dll, "GetModuleFileNameExA");
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73 infoFunc = (GetModuleInformationFunc*) GetProcAddress(dll, "GetModuleInformation");
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74
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75 assert(enumFunc != NULL);
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76 assert(fnFunc != NULL);
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77 assert(infoFunc != NULL);
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78 }
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79
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80 static HMODULE* mods = new HMODULE[256];
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81 static int numMods = 256;
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82
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83 if (mods == NULL) {
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84 mods = new HMODULE[numMods];
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85 if (mods == NULL) {
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86 return;
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87 }
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88 }
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89
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90 bool done = false;
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91
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92 HANDLE proc = OpenProcess(PROCESS_ALL_ACCESS, FALSE, pid);
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93 if (proc == NULL) {
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94 return;
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95 }
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96
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97 do {
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98 DWORD bufSize = numMods * sizeof(HMODULE);
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99 DWORD neededSize;
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100
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101 if (!(*enumFunc)(proc, mods, bufSize, &neededSize)) {
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102 // Enum failed
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103 CloseHandle(proc);
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104 return;
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105 }
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106
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107 int numFetched = neededSize / sizeof(HMODULE);
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108
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109 if (numMods < numFetched) {
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110 // Grow buffer
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111 numMods = MAX2(numFetched, 2 * numMods);
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112 delete[] mods;
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113 mods = new HMODULE[numMods];
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114 if (mods == NULL) {
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115 CloseHandle(proc);
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116 return;
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117 }
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118 } else {
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119 char filename[MAX_PATH];
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120 MODULEINFO modInfo;
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121
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122 // Iterate through and fetch each one's info
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123 for (int i = 0; i < numFetched; i++) {
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124 if (!(*fnFunc)(proc, mods[i], filename, MAX_PATH)) {
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125 CloseHandle(proc);
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126 return;
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127 }
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128
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129 if (!(*infoFunc)(proc, mods[i], &modInfo, sizeof(MODULEINFO))) {
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130 CloseHandle(proc);
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131 return;
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132 }
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133
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134 info.push_back(LibInfo(string(filename), (void*) modInfo.lpBaseOfDll));
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135 }
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136
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137 done = true;
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138 }
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139 } while (!done);
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140
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141 CloseHandle(proc);
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142 return;
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143 }
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144
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145 void
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146 libInfoImplToolHelp(DWORD pid, vector<LibInfo>& info) {
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147 using namespace ToolHelp;
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148
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149 static CreateToolhelp32SnapshotFunc* snapshotFunc = NULL;
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150 static Module32FirstFunc* firstFunc = NULL;
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151 static Module32NextFunc* nextFunc = NULL;
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152
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153 if (snapshotFunc == NULL) {
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154 HMODULE dll = loadDLL();
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155
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156 snapshotFunc =
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157 (CreateToolhelp32SnapshotFunc*) GetProcAddress(dll,
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158 "CreateToolhelp32Snapshot");
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159
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160 firstFunc = (Module32FirstFunc*) GetProcAddress(dll,
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161 "Module32First");
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162
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163 nextFunc = (Module32NextFunc*) GetProcAddress(dll,
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164 "Module32Next");
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165
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166 assert(snapshotFunc != NULL);
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167 assert(firstFunc != NULL);
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168 assert(nextFunc != NULL);
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169 }
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170
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171 HANDLE snapshot = (*snapshotFunc)(TH32CS_SNAPMODULE, pid);
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172 if (snapshot == (HANDLE) -1) {
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173 // Error occurred during snapshot
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174 return;
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175 }
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176
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177 // Iterate
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178 MODULEENTRY32 module;
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179 if ((*firstFunc)(snapshot, &module)) {
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180 do {
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181 info.push_back(LibInfo(string(module.szExePath), (void*) module.modBaseAddr));
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182 } while ((*nextFunc)(snapshot, &module));
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183 }
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184
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185 CloseHandle(snapshot);
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186 }
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