GeezerVison is showing github.com — MemoryModule/example/DllLoader/DllLoader.cpp at master · fancycode/MemoryModule

Expand file tree

DllLoader.cpp

Copy path

More file actions

Latest commit

History

343 lines (274 loc) · 9.44 KB

DllLoader.cpp

Copy path

File metadata and controls

343 lines (274 loc) · 9.44 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

338

339

340

341

342

#define WIN32_LEAN_AND_MEAN

#ifndef _CRT_SECURE_NO_WARNINGS

#define _CRT_SECURE_NO_WARNINGS

#endif

#include <assert.h>

#include <windows.h>

#include <tchar.h>

#include <stdio.h>

#include <malloc.h>

#include "../../MemoryModule.h"

typedef int (*addNumberProc)(int, int);

#define DLL_FILE TEXT("..\\SampleDLL\\SampleDLL.dll")

void LoadFromFile(void)

{

addNumberProc addNumber;

HRSRC resourceInfo;

DWORD resourceSize;

LPVOID resourceData;

TCHAR buffer[100];

HINSTANCE handle = LoadLibrary(DLL_FILE);

if (handle == NULL)

return;

addNumber = (addNumberProc)GetProcAddress(handle, "addNumbers");

_tprintf(_T("From file: %d\n"), addNumber(1, 2));

resourceInfo = FindResource(handle, MAKEINTRESOURCE(VS_VERSION_INFO), RT_VERSION);

_tprintf(_T("FindResource returned 0x%p\n"), resourceInfo);

resourceSize = SizeofResource(handle, resourceInfo);

resourceData = LoadResource(handle, resourceInfo);

_tprintf(_T("Resource data: %ld bytes at 0x%p\n"), resourceSize, resourceData);

LoadString(handle, 1, buffer, sizeof(buffer));

_tprintf(_T("String1: %s\n"), buffer);

LoadString(handle, 20, buffer, sizeof(buffer));

_tprintf(_T("String2: %s\n"), buffer);

FreeLibrary(handle);

}

void* ReadLibrary(size_t* pSize) {

size_t read;

void* result;

FILE* fp;

fp = _tfopen(DLL_FILE, _T("rb"));

if (fp == NULL)

{

_tprintf(_T("Can't open DLL file \"%s\"."), DLL_FILE);

return NULL;

}

fseek(fp, 0, SEEK_END);

*pSize = static_cast<size_t>(ftell(fp));

if (*pSize == 0)

{

fclose(fp);

return NULL;

}

result = (unsigned char *)malloc(*pSize);

if (result == NULL)

{

return NULL;

}

fseek(fp, 0, SEEK_SET);

read = fread(result, 1, *pSize, fp);

fclose(fp);

if (read != *pSize)

{

free(result);

return NULL;

}

return result;

}

void LoadFromMemory(void)

{

void *data;

size_t size;

HMEMORYMODULE handle;

addNumberProc addNumber;

HMEMORYRSRC resourceInfo;

DWORD resourceSize;

LPVOID resourceData;

TCHAR buffer[100];

data = ReadLibrary(&size);

if (data == NULL)

{

return;

}

handle = MemoryLoadLibrary(data, size);

if (handle == NULL)

{

_tprintf(_T("Can't load library from memory.\n"));

goto exit;

}

addNumber = (addNumberProc)MemoryGetProcAddress(handle, "addNumbers");

_tprintf(_T("From memory: %d\n"), addNumber(1, 2));

resourceInfo = MemoryFindResource(handle, MAKEINTRESOURCE(VS_VERSION_INFO), RT_VERSION);

_tprintf(_T("MemoryFindResource returned 0x%p\n"), resourceInfo);

resourceSize = MemorySizeofResource(handle, resourceInfo);

resourceData = MemoryLoadResource(handle, resourceInfo);

_tprintf(_T("Memory resource data: %ld bytes at 0x%p\n"), resourceSize, resourceData);

MemoryLoadString(handle, 1, buffer, sizeof(buffer));

_tprintf(_T("String1: %s\n"), buffer);

MemoryLoadString(handle, 20, buffer, sizeof(buffer));

_tprintf(_T("String2: %s\n"), buffer);

MemoryFreeLibrary(handle);

exit:

free(data);

}

#define MAX_CALLS 20

struct CallList {

int current_alloc_call, current_free_call;

CustomAllocFunc alloc_calls[MAX_CALLS];

CustomFreeFunc free_calls[MAX_CALLS];

};

LPVOID MemoryFailingAlloc(LPVOID address, SIZE_T size, DWORD allocationType, DWORD protect, void* userdata)

{

UNREFERENCED_PARAMETER(address);

UNREFERENCED_PARAMETER(size);

UNREFERENCED_PARAMETER(allocationType);

UNREFERENCED_PARAMETER(protect);

UNREFERENCED_PARAMETER(userdata);

return NULL;

}

LPVOID MemoryMockAlloc(LPVOID address, SIZE_T size, DWORD allocationType, DWORD protect, void* userdata)

{

CallList* calls = (CallList*)userdata;

CustomAllocFunc current_func = calls->alloc_calls[calls->current_alloc_call++];

assert(current_func != NULL);

return current_func(address, size, allocationType, protect, NULL);

}

BOOL MemoryMockFree(LPVOID lpAddress, SIZE_T dwSize, DWORD dwFreeType, void* userdata)

{

CallList* calls = (CallList*)userdata;

CustomFreeFunc current_func = calls->free_calls[calls->current_free_call++];

assert(current_func != NULL);

return current_func(lpAddress, dwSize, dwFreeType, NULL);

}

void InitFuncs(void** funcs, va_list args) {

for (int i = 0; ; i++) {

assert(i < MAX_CALLS);

funcs[i] = va_arg(args, void*);

if (funcs[i] == NULL) break;

}

void InitAllocFuncs(CallList* calls, ...) {

va_list args;

va_start(args, calls);

InitFuncs((void**)calls->alloc_calls, args);

va_end(args);

calls->current_alloc_call = 0;

}

void InitFreeFuncs(CallList* calls, ...) {

va_list args;

va_start(args, calls);

InitFuncs((void**)calls->free_calls, args);

va_end(args);

calls->current_free_call = 0;

}

void InitFreeFunc(CallList* calls, CustomFreeFunc freeFunc) {

for (int i = 0; i < MAX_CALLS; i++) {

calls->free_calls[i] = freeFunc;

}

calls->current_free_call = 0;

}

void TestFailingAllocation(void *data, size_t size) {

CallList expected_calls;

HMEMORYMODULE handle;

InitAllocFuncs(&expected_calls, MemoryFailingAlloc, MemoryFailingAlloc, NULL);

InitFreeFuncs(&expected_calls, NULL);

handle = MemoryLoadLibraryEx(

data, size, MemoryMockAlloc, MemoryMockFree, MemoryDefaultLoadLibrary,

MemoryDefaultGetProcAddress, MemoryDefaultFreeLibrary, &expected_calls);

assert(handle == NULL);

assert(GetLastError() == ERROR_OUTOFMEMORY);

assert(expected_calls.current_free_call == 0);

MemoryFreeLibrary(handle);

assert(expected_calls.current_free_call == 0);

}

void TestCleanupAfterFailingAllocation(void *data, size_t size) {

CallList expected_calls;

HMEMORYMODULE handle;

int free_calls_after_loading;

InitAllocFuncs(&expected_calls,

MemoryDefaultAlloc,

MemoryFailingAlloc,

NULL);

InitFreeFuncs(&expected_calls, MemoryDefaultFree, NULL);

handle = MemoryLoadLibraryEx(

data, size, MemoryMockAlloc, MemoryMockFree, MemoryDefaultLoadLibrary,

MemoryDefaultGetProcAddress, MemoryDefaultFreeLibrary, &expected_calls);

free_calls_after_loading = expected_calls.current_free_call;

MemoryFreeLibrary(handle);

assert(expected_calls.current_free_call == free_calls_after_loading);

}

void TestFreeAfterDefaultAlloc(void *data, size_t size) {

CallList expected_calls;

HMEMORYMODULE handle;

int free_calls_after_loading;

// Note: free might get called internally multiple times

InitFreeFunc(&expected_calls, MemoryDefaultFree);

handle = MemoryLoadLibraryEx(

data, size, MemoryDefaultAlloc, MemoryMockFree, MemoryDefaultLoadLibrary,

MemoryDefaultGetProcAddress, MemoryDefaultFreeLibrary, &expected_calls);

assert(handle != NULL);

free_calls_after_loading = expected_calls.current_free_call;

MemoryFreeLibrary(handle);

assert(expected_calls.current_free_call == free_calls_after_loading + 1);

}

#ifdef _WIN64

LPVOID MemoryAllocHigh(LPVOID address, SIZE_T size, DWORD allocationType, DWORD protect, void* userdata)

{

int* counter = static_cast<int*>(userdata);

if (*counter == 0) {

// Make sure the image gets loaded to an address above 32bit.

uintptr_t offset = 0x10000000000;

address = (LPVOID) ((uintptr_t) address + offset);

}

(*counter)++;

return MemoryDefaultAlloc(address, size, allocationType, protect, NULL);

}

void TestAllocHighMemory(void *data, size_t size) {

HMEMORYMODULE handle;

int counter = 0;

addNumberProc addNumber;

HMEMORYRSRC resourceInfo;

DWORD resourceSize;

LPVOID resourceData;

TCHAR buffer[100];

handle = MemoryLoadLibraryEx(

data, size, MemoryAllocHigh, MemoryDefaultFree, MemoryDefaultLoadLibrary,

MemoryDefaultGetProcAddress, MemoryDefaultFreeLibrary, &counter);

assert(handle != NULL);

addNumber = (addNumberProc)MemoryGetProcAddress(handle, "addNumbers");

_tprintf(_T("From memory: %d\n"), addNumber(1, 2));

resourceInfo = MemoryFindResource(handle, MAKEINTRESOURCE(VS_VERSION_INFO), RT_VERSION);

_tprintf(_T("MemoryFindResource returned 0x%p\n"), resourceInfo);

resourceSize = MemorySizeofResource(handle, resourceInfo);

resourceData = MemoryLoadResource(handle, resourceInfo);

_tprintf(_T("Memory resource data: %ld bytes at 0x%p\n"), resourceSize, resourceData);

MemoryLoadString(handle, 1, buffer, sizeof(buffer));

_tprintf(_T("String1: %s\n"), buffer);

MemoryLoadString(handle, 20, buffer, sizeof(buffer));

_tprintf(_T("String2: %s\n"), buffer);

MemoryFreeLibrary(handle);

}

#endif // _WIN64

void TestCustomAllocAndFree(void)

{

void *data;

size_t size;

data = ReadLibrary(&size);

if (data == NULL)

{

return;

}

_tprintf(_T("Test MemoryLoadLibraryEx after initially failing allocation function\n"));

TestFailingAllocation(data, size);

_tprintf(_T("Test cleanup after MemoryLoadLibraryEx with failing allocation function\n"));

TestCleanupAfterFailingAllocation(data, size);

_tprintf(_T("Test custom free function after MemoryLoadLibraryEx\n"));

TestFreeAfterDefaultAlloc(data, size);

#ifdef _WIN64

_tprintf(_T("Test allocating in high memory\n"));

TestAllocHighMemory(data, size);

#endif

free(data);

}

int main()

{

LoadFromFile();

printf("\n\n");

LoadFromMemory();

printf("\n\n");

TestCustomAllocAndFree();

return 0;

}