J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2005-2006 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | #include <windows.h> |
| 26 | #include <string.h> |
| 27 | |
| 28 | #include "jni.h" |
| 29 | #include "jni_util.h" |
| 30 | |
| 31 | #include "sun_tools_attach_WindowsVirtualMachine.h" |
| 32 | |
| 33 | |
| 34 | /* kernel32 */ |
| 35 | typedef HINSTANCE (WINAPI* LoadLibraryFunc) (LPCTSTR); |
| 36 | typedef FARPROC (WINAPI* GetProcAddressFunc)(HMODULE, LPCSTR); |
| 37 | |
| 38 | /* only on Windows 64-bit or 32-bit application running under WOW64 */ |
| 39 | typedef BOOL (WINAPI *IsWow64ProcessFunc) (HANDLE, PBOOL); |
| 40 | |
| 41 | static LoadLibraryFunc _LoadLibrary; |
| 42 | static GetProcAddressFunc _GetProcAddress; |
| 43 | static IsWow64ProcessFunc _IsWow64Process; |
| 44 | |
| 45 | /* psapi */ |
| 46 | typedef BOOL (WINAPI *EnumProcessModulesFunc) (HANDLE, HMODULE *, DWORD, LPDWORD ); |
| 47 | typedef DWORD (WINAPI *GetModuleFileNameExFunc) ( HANDLE, HMODULE, LPTSTR, DWORD ); |
| 48 | |
| 49 | /* exported function in target VM */ |
| 50 | typedef jint (WINAPI* EnqueueOperationFunc) |
| 51 | (const char* cmd, const char* arg1, const char* arg2, const char* arg3, const char* pipename); |
| 52 | |
| 53 | /* OpenProcess with SE_DEBUG_NAME privilege */ |
| 54 | static HANDLE |
| 55 | doPrivilegedOpenProcess(DWORD dwDesiredAccess, BOOL bInheritHandle, DWORD dwProcessId); |
| 56 | |
| 57 | /* convert jstring to C string */ |
| 58 | static void jstring_to_cstring(JNIEnv* env, jstring jstr, char* cstr, int len); |
| 59 | |
| 60 | |
| 61 | /* |
| 62 | * Data copied to target process |
| 63 | */ |
| 64 | |
| 65 | #define MAX_LIBNAME_LENGTH 16 |
| 66 | #define MAX_FUNC_LENGTH 32 |
| 67 | #define MAX_CMD_LENGTH 16 |
| 68 | #define MAX_ARG_LENGTH 1024 |
| 69 | #define MAX_ARGS 3 |
| 70 | #define MAX_PIPE_NAME_LENGTH 256 |
| 71 | |
| 72 | typedef struct { |
| 73 | LoadLibraryFunc _LoadLibrary; |
| 74 | GetProcAddressFunc _GetProcAddress; |
| 75 | char jvmLib[MAX_LIBNAME_LENGTH]; /* "jvm.dll" */ |
| 76 | char func1[MAX_FUNC_LENGTH]; |
| 77 | char func2[MAX_FUNC_LENGTH]; |
| 78 | char cmd[MAX_CMD_LENGTH]; /* "load", "dump", ... */ |
| 79 | char arg[MAX_ARGS][MAX_ARG_LENGTH]; /* arguments to command */ |
| 80 | char pipename[MAX_PIPE_NAME_LENGTH]; |
| 81 | } DataBlock; |
| 82 | |
| 83 | /* |
| 84 | * Return codes from enqueue function executed in target VM |
| 85 | */ |
| 86 | #define ERR_OPEN_JVM_FAIL 200 |
| 87 | #define ERR_GET_ENQUEUE_FUNC_FAIL 201 |
| 88 | |
| 89 | |
| 90 | /* |
| 91 | * Code copied to target process |
| 92 | */ |
| 93 | #pragma check_stack (off) |
| 94 | static DWORD WINAPI thread_func(DataBlock *pData) |
| 95 | { |
| 96 | HINSTANCE h; |
| 97 | EnqueueOperationFunc addr; |
| 98 | |
| 99 | h = pData->_LoadLibrary(pData->jvmLib); |
| 100 | if (h == NULL) { |
| 101 | return ERR_OPEN_JVM_FAIL; |
| 102 | } |
| 103 | |
| 104 | addr = (EnqueueOperationFunc)(pData->_GetProcAddress(h, pData->func1)); |
| 105 | if (addr == NULL) { |
| 106 | addr = (EnqueueOperationFunc)(pData->_GetProcAddress(h, pData->func2)); |
| 107 | } |
| 108 | if (addr == NULL) { |
| 109 | return ERR_GET_ENQUEUE_FUNC_FAIL; |
| 110 | } |
| 111 | |
| 112 | /* "null" command - does nothing in the target VM */ |
| 113 | if (pData->cmd[0] == '\0') { |
| 114 | return 0; |
| 115 | } else { |
| 116 | return (*addr)(pData->cmd, pData->arg[0], pData->arg[1], pData->arg[2], pData->pipename); |
| 117 | } |
| 118 | } |
| 119 | |
| 120 | /* This function marks the end of thread_func. */ |
| 121 | static void thread_end (void) { |
| 122 | } |
| 123 | #pragma check_stack |
| 124 | |
| 125 | |
| 126 | /* |
| 127 | * Class: sun_tools_attach_WindowsVirtualMachine |
| 128 | * Method: init |
| 129 | * Signature: ()V |
| 130 | */ |
| 131 | JNIEXPORT void JNICALL Java_sun_tools_attach_WindowsVirtualMachine_init |
| 132 | (JNIEnv *env, jclass cls) |
| 133 | { |
| 134 | HINSTANCE h = LoadLibrary("kernel32"); |
| 135 | if (h != NULL) { |
| 136 | _LoadLibrary = (LoadLibraryFunc) GetProcAddress(h, "LoadLibraryA"); |
| 137 | _GetProcAddress = (GetProcAddressFunc)GetProcAddress(h, "GetProcAddress"); |
| 138 | _IsWow64Process = (IsWow64ProcessFunc)GetProcAddress(h, "IsWow64Process"); |
| 139 | } |
| 140 | if (_LoadLibrary == NULL || _GetProcAddress == NULL) { |
| 141 | JNU_ThrowInternalError(env, "Unable to get address of LoadLibraryA or GetProcAddress"); |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | |
| 146 | /* |
| 147 | * Class: sun_tools_attach_WindowsVirtualMachine |
| 148 | * Method: generateStub |
| 149 | * Signature: ()[B |
| 150 | */ |
| 151 | JNIEXPORT jbyteArray JNICALL Java_sun_tools_attach_WindowsVirtualMachine_generateStub |
| 152 | (JNIEnv *env, jclass cls) |
| 153 | { |
| 154 | /* |
| 155 | * We should replace this with a real stub generator at some point |
| 156 | */ |
| 157 | DWORD len; |
| 158 | jbyteArray array; |
| 159 | |
| 160 | len = (DWORD)((LPBYTE) thread_end - (LPBYTE) thread_func); |
| 161 | array= (*env)->NewByteArray(env, (jsize)len); |
| 162 | if (array != NULL) { |
| 163 | (*env)->SetByteArrayRegion(env, array, 0, (jint)len, (jbyte*)&thread_func); |
| 164 | } |
| 165 | return array; |
| 166 | } |
| 167 | |
| 168 | /* |
| 169 | * Class: sun_tools_attach_WindowsVirtualMachine |
| 170 | * Method: openProcess |
| 171 | * Signature: (I)J |
| 172 | */ |
| 173 | JNIEXPORT jlong JNICALL Java_sun_tools_attach_WindowsVirtualMachine_openProcess |
| 174 | (JNIEnv *env, jclass cls, jint pid) |
| 175 | { |
| 176 | HANDLE hProcess; |
| 177 | |
| 178 | /* |
| 179 | * Attempt to open process. If it fails then we try to enable the |
| 180 | * SE_DEBUG_NAME privilege and retry. |
| 181 | */ |
| 182 | hProcess = OpenProcess(PROCESS_ALL_ACCESS, FALSE, (DWORD)pid); |
| 183 | if (hProcess == NULL && GetLastError() == ERROR_ACCESS_DENIED) { |
| 184 | hProcess = doPrivilegedOpenProcess(PROCESS_ALL_ACCESS, FALSE, (DWORD)pid); |
| 185 | } |
| 186 | |
| 187 | if (hProcess == NULL) { |
| 188 | if (GetLastError() == ERROR_INVALID_PARAMETER) { |
| 189 | JNU_ThrowIOException(env, "no such process"); |
| 190 | } else { |
| 191 | JNU_ThrowIOExceptionWithLastError(env, "OpenProcess failed"); |
| 192 | } |
| 193 | return (jlong)0; |
| 194 | } |
| 195 | |
| 196 | /* |
| 197 | * On Windows 64-bit we need to handle 32-bit tools trying to attach to 64-bit |
| 198 | * processes (and visa versa). X-architecture attaching is currently not supported |
| 199 | * by this implementation. |
| 200 | */ |
| 201 | if (_IsWow64Process != NULL) { |
| 202 | BOOL isCurrent32bit, isTarget32bit; |
| 203 | (*_IsWow64Process)(GetCurrentProcess(), &isCurrent32bit); |
| 204 | (*_IsWow64Process)(hProcess, &isTarget32bit); |
| 205 | |
| 206 | if (isCurrent32bit != isTarget32bit) { |
| 207 | CloseHandle(hProcess); |
| 208 | #ifdef _WIN64 |
| 209 | JNU_ThrowByName(env, "com/sun/tools/attach/AttachNotSupportedException", |
| 210 | "Unable to attach to 32-bit process running under WOW64"); |
| 211 | #else |
| 212 | JNU_ThrowByName(env, "com/sun/tools/attach/AttachNotSupportedException", |
| 213 | "Unable to attach to 64-bit process"); |
| 214 | #endif |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | return (jlong)hProcess; |
| 219 | } |
| 220 | |
| 221 | |
| 222 | /* |
| 223 | * Class: sun_tools_attach_WindowsVirtualMachine |
| 224 | * Method: closeProcess |
| 225 | * Signature: (J)V |
| 226 | */ |
| 227 | JNIEXPORT void JNICALL Java_sun_tools_attach_WindowsVirtualMachine_closeProcess |
| 228 | (JNIEnv *env, jclass cls, jlong hProcess) |
| 229 | { |
| 230 | CloseHandle((HANDLE)hProcess); |
| 231 | } |
| 232 | |
| 233 | |
| 234 | /* |
| 235 | * Class: sun_tools_attach_WindowsVirtualMachine |
| 236 | * Method: createPipe |
| 237 | * Signature: (Ljava/lang/String;)J |
| 238 | */ |
| 239 | JNIEXPORT jlong JNICALL Java_sun_tools_attach_WindowsVirtualMachine_createPipe |
| 240 | (JNIEnv *env, jclass cls, jstring pipename) |
| 241 | { |
| 242 | HANDLE hPipe; |
| 243 | char name[MAX_PIPE_NAME_LENGTH]; |
| 244 | |
| 245 | jstring_to_cstring(env, pipename, name, MAX_PIPE_NAME_LENGTH); |
| 246 | |
| 247 | hPipe = CreateNamedPipe( |
| 248 | name, // pipe name |
| 249 | PIPE_ACCESS_INBOUND, // read access |
| 250 | PIPE_TYPE_BYTE | // byte mode |
| 251 | PIPE_READMODE_BYTE | |
| 252 | PIPE_WAIT, // blocking mode |
| 253 | 1, // max. instances |
| 254 | 128, // output buffer size |
| 255 | 8192, // input buffer size |
| 256 | NMPWAIT_USE_DEFAULT_WAIT, // client time-out |
| 257 | NULL); // default security attribute |
| 258 | |
| 259 | if (hPipe == INVALID_HANDLE_VALUE) { |
| 260 | JNU_ThrowIOExceptionWithLastError(env, "CreateNamedPipe failed"); |
| 261 | } |
| 262 | return (jlong)hPipe; |
| 263 | } |
| 264 | |
| 265 | /* |
| 266 | * Class: sun_tools_attach_WindowsVirtualMachine |
| 267 | * Method: closePipe |
| 268 | * Signature: (J)V |
| 269 | */ |
| 270 | JNIEXPORT void JNICALL Java_sun_tools_attach_WindowsVirtualMachine_closePipe |
| 271 | (JNIEnv *env, jclass cls, jlong hPipe) |
| 272 | { |
| 273 | CloseHandle( (HANDLE)hPipe ); |
| 274 | } |
| 275 | |
| 276 | /* |
| 277 | * Class: sun_tools_attach_WindowsVirtualMachine |
| 278 | * Method: connectPipe |
| 279 | * Signature: (J)V |
| 280 | */ |
| 281 | JNIEXPORT void JNICALL Java_sun_tools_attach_WindowsVirtualMachine_connectPipe |
| 282 | (JNIEnv *env, jclass cls, jlong hPipe) |
| 283 | { |
| 284 | BOOL fConnected; |
| 285 | |
| 286 | fConnected = ConnectNamedPipe((HANDLE)hPipe, NULL) ? |
| 287 | TRUE : (GetLastError() == ERROR_PIPE_CONNECTED); |
| 288 | if (!fConnected) { |
| 289 | JNU_ThrowIOExceptionWithLastError(env, "ConnectNamedPipe failed"); |
| 290 | } |
| 291 | } |
| 292 | |
| 293 | /* |
| 294 | * Class: sun_tools_attach_WindowsVirtualMachine |
| 295 | * Method: readPipe |
| 296 | * Signature: (J[BII)I |
| 297 | */ |
| 298 | JNIEXPORT jint JNICALL Java_sun_tools_attach_WindowsVirtualMachine_readPipe |
| 299 | (JNIEnv *env, jclass cls, jlong hPipe, jbyteArray ba, jint off, jint baLen) |
| 300 | { |
| 301 | unsigned char buf[128]; |
| 302 | DWORD len, nread, remaining; |
| 303 | BOOL fSuccess; |
| 304 | |
| 305 | len = sizeof(buf); |
| 306 | remaining = (DWORD)(baLen - off); |
| 307 | if (len > remaining) { |
| 308 | len = remaining; |
| 309 | } |
| 310 | |
| 311 | fSuccess = ReadFile( |
| 312 | (HANDLE)hPipe, // handle to pipe |
| 313 | buf, // buffer to receive data |
| 314 | len, // size of buffer |
| 315 | &nread, // number of bytes read |
| 316 | NULL); // not overlapped I/O |
| 317 | |
| 318 | if (!fSuccess) { |
| 319 | if (GetLastError() == ERROR_BROKEN_PIPE) { |
| 320 | return (jint)-1; |
| 321 | } else { |
| 322 | JNU_ThrowIOExceptionWithLastError(env, "ReadFile"); |
| 323 | } |
| 324 | } else { |
| 325 | if (nread == 0) { |
| 326 | return (jint)-1; // EOF |
| 327 | } else { |
| 328 | (*env)->SetByteArrayRegion(env, ba, off, (jint)nread, (jbyte *)(buf+off)); |
| 329 | } |
| 330 | } |
| 331 | |
| 332 | return (jint)nread; |
| 333 | } |
| 334 | |
| 335 | |
| 336 | /* |
| 337 | * Class: sun_tools_attach_WindowsVirtualMachine |
| 338 | * Method: enqueue |
| 339 | * Signature: (JZLjava/lang/String;[Ljava/lang/Object;)V |
| 340 | */ |
| 341 | JNIEXPORT void JNICALL Java_sun_tools_attach_WindowsVirtualMachine_enqueue |
| 342 | (JNIEnv *env, jclass cls, jlong handle, jbyteArray stub, jstring cmd, |
| 343 | jstring pipename, jobjectArray args) |
| 344 | { |
| 345 | DataBlock data; |
| 346 | DataBlock* pData; |
| 347 | DWORD* pCode; |
| 348 | DWORD numBytes; |
| 349 | DWORD stubLen; |
| 350 | HANDLE hProcess, hThread; |
| 351 | jint argsLen, i; |
| 352 | jbyte* stubCode; |
| 353 | jboolean isCopy; |
| 354 | |
| 355 | /* |
| 356 | * Setup data to copy to target process |
| 357 | */ |
| 358 | data._LoadLibrary = _LoadLibrary; |
| 359 | data._GetProcAddress = _GetProcAddress; |
| 360 | |
| 361 | strcpy(data.jvmLib, "jvm"); |
| 362 | strcpy(data.func1, "JVM_EnqueueOperation"); |
| 363 | strcpy(data.func2, "_JVM_EnqueueOperation@20"); |
| 364 | |
| 365 | /* |
| 366 | * Command and arguments |
| 367 | */ |
| 368 | jstring_to_cstring(env, cmd, data.cmd, MAX_CMD_LENGTH); |
| 369 | argsLen = (*env)->GetArrayLength(env, args); |
| 370 | |
| 371 | if (argsLen > 0) { |
| 372 | if (argsLen > MAX_ARGS) { |
| 373 | JNU_ThrowInternalError(env, "Too many arguments"); |
| 374 | } |
| 375 | for (i=0; i<argsLen; i++) { |
| 376 | jobject obj = (*env)->GetObjectArrayElement(env, args, i); |
| 377 | if (obj == NULL) { |
| 378 | data.arg[i][0] = '\0'; |
| 379 | } else { |
| 380 | jstring_to_cstring(env, obj, data.arg[i], MAX_ARG_LENGTH); |
| 381 | } |
| 382 | if ((*env)->ExceptionOccurred(env)) return; |
| 383 | } |
| 384 | } |
| 385 | for (i=argsLen; i<MAX_ARGS; i++) { |
| 386 | data.arg[i][0] = '\0'; |
| 387 | } |
| 388 | |
| 389 | /* pipe name */ |
| 390 | jstring_to_cstring(env, pipename, data.pipename, MAX_PIPE_NAME_LENGTH); |
| 391 | |
| 392 | /* |
| 393 | * Allocate memory in target process for data and code stub |
| 394 | * (assumed aligned and matches architecture of target process) |
| 395 | */ |
| 396 | hProcess = (HANDLE)handle; |
| 397 | |
| 398 | pData = (DataBlock*) VirtualAllocEx( hProcess, 0, sizeof(DataBlock), MEM_COMMIT, PAGE_READWRITE ); |
| 399 | if (pData == NULL) { |
| 400 | JNU_ThrowIOExceptionWithLastError(env, "VirtualAllocEx failed"); |
| 401 | return; |
| 402 | } |
| 403 | WriteProcessMemory( hProcess, (LPVOID)pData, (LPVOID)&data, (DWORD)sizeof(DataBlock), &numBytes ); |
| 404 | |
| 405 | |
| 406 | stubLen = (DWORD)(*env)->GetArrayLength(env, stub); |
| 407 | stubCode = (*env)->GetByteArrayElements(env, stub, &isCopy); |
| 408 | |
| 409 | pCode = (PDWORD) VirtualAllocEx( hProcess, 0, stubLen, MEM_COMMIT, PAGE_EXECUTE_READWRITE ); |
| 410 | if (pCode == NULL) { |
| 411 | JNU_ThrowIOExceptionWithLastError(env, "VirtualAllocEx failed"); |
| 412 | VirtualFreeEx(hProcess, pData, 0, MEM_RELEASE); |
| 413 | return; |
| 414 | } |
| 415 | WriteProcessMemory( hProcess, (LPVOID)pCode, (LPVOID)stubCode, (DWORD)stubLen, &numBytes ); |
| 416 | if (isCopy) { |
| 417 | (*env)->ReleaseByteArrayElements(env, stub, stubCode, JNI_ABORT); |
| 418 | } |
| 419 | |
| 420 | /* |
| 421 | * Create thread in target process to execute code |
| 422 | */ |
| 423 | hThread = CreateRemoteThread( hProcess, |
| 424 | NULL, |
| 425 | 0, |
| 426 | (LPTHREAD_START_ROUTINE) pCode, |
| 427 | pData, |
| 428 | 0, |
| 429 | NULL ); |
| 430 | if (hThread != NULL) { |
| 431 | if (WaitForSingleObject(hThread, INFINITE) != WAIT_OBJECT_0) { |
| 432 | JNU_ThrowIOExceptionWithLastError(env, "WaitForSingleObject failed"); |
| 433 | } else { |
| 434 | DWORD exitCode; |
| 435 | GetExitCodeThread(hThread, &exitCode); |
| 436 | if (exitCode) { |
| 437 | switch (exitCode) { |
| 438 | case ERR_OPEN_JVM_FAIL : |
| 439 | JNU_ThrowIOException(env, |
| 440 | "jvm.dll not loaded by target process"); |
| 441 | break; |
| 442 | case ERR_GET_ENQUEUE_FUNC_FAIL : |
| 443 | JNU_ThrowIOException(env, |
| 444 | "Unable to enqueue operation: the target VM does not support attach mechanism"); |
| 445 | break; |
| 446 | default : |
| 447 | JNU_ThrowInternalError(env, |
| 448 | "Remote thread failed for unknown reason"); |
| 449 | } |
| 450 | } |
| 451 | } |
| 452 | CloseHandle(hThread); |
| 453 | } else { |
| 454 | JNU_ThrowIOExceptionWithLastError(env, "CreateRemoteThread failed"); |
| 455 | } |
| 456 | |
| 457 | VirtualFreeEx(hProcess, pCode, 0, MEM_RELEASE); |
| 458 | VirtualFreeEx(hProcess, pData, 0, MEM_RELEASE); |
| 459 | } |
| 460 | |
| 461 | /* |
| 462 | * Attempts to enable the SE_DEBUG_NAME privilege and open the given process. |
| 463 | */ |
| 464 | static HANDLE |
| 465 | doPrivilegedOpenProcess(DWORD dwDesiredAccess, BOOL bInheritHandle, DWORD dwProcessId) { |
| 466 | HANDLE hToken; |
| 467 | HANDLE hProcess = NULL; |
| 468 | LUID luid; |
| 469 | TOKEN_PRIVILEGES tp, tpPrevious; |
| 470 | DWORD retLength, error; |
| 471 | |
| 472 | /* |
| 473 | * Get the access token |
| 474 | */ |
| 475 | if (!OpenThreadToken(GetCurrentThread(), |
| 476 | TOKEN_ADJUST_PRIVILEGES|TOKEN_QUERY, |
| 477 | FALSE, |
| 478 | &hToken)) { |
| 479 | if (GetLastError() != ERROR_NO_TOKEN) { |
| 480 | return (HANDLE)NULL; |
| 481 | } |
| 482 | |
| 483 | /* |
| 484 | * No access token for the thread so impersonate the security context |
| 485 | * of the process. |
| 486 | */ |
| 487 | if (!ImpersonateSelf(SecurityImpersonation)) { |
| 488 | return (HANDLE)NULL; |
| 489 | } |
| 490 | if (!OpenThreadToken(GetCurrentThread(), |
| 491 | TOKEN_ADJUST_PRIVILEGES|TOKEN_QUERY, |
| 492 | FALSE, |
| 493 | &hToken)) { |
| 494 | return (HANDLE)NULL; |
| 495 | } |
| 496 | } |
| 497 | |
| 498 | /* |
| 499 | * Get LUID for the privilege |
| 500 | */ |
| 501 | if(!LookupPrivilegeValue(NULL, SE_DEBUG_NAME, &luid)) { |
| 502 | error = GetLastError(); |
| 503 | CloseHandle(hToken); |
| 504 | SetLastError(error); |
| 505 | return (HANDLE)NULL; |
| 506 | } |
| 507 | |
| 508 | /* |
| 509 | * Enable the privilege |
| 510 | */ |
| 511 | ZeroMemory(&tp, sizeof(tp)); |
| 512 | tp.PrivilegeCount = 1; |
| 513 | tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED; |
| 514 | tp.Privileges[0].Luid = luid; |
| 515 | |
| 516 | error = 0; |
| 517 | if (AdjustTokenPrivileges(hToken, |
| 518 | FALSE, |
| 519 | &tp, |
| 520 | sizeof(TOKEN_PRIVILEGES), |
| 521 | &tpPrevious, |
| 522 | &retLength)) { |
| 523 | /* |
| 524 | * If we enabled the privilege then attempt to open the |
| 525 | * process. |
| 526 | */ |
| 527 | if (GetLastError() == ERROR_SUCCESS) { |
| 528 | hProcess = OpenProcess(dwDesiredAccess, bInheritHandle, dwProcessId); |
| 529 | if (hProcess == NULL) { |
| 530 | error = GetLastError(); |
| 531 | } |
| 532 | } else { |
| 533 | error = ERROR_ACCESS_DENIED; |
| 534 | } |
| 535 | |
| 536 | /* |
| 537 | * Revert to the previous privileges |
| 538 | */ |
| 539 | AdjustTokenPrivileges(hToken, |
| 540 | FALSE, |
| 541 | &tpPrevious, |
| 542 | retLength, |
| 543 | NULL, |
| 544 | NULL); |
| 545 | } else { |
| 546 | error = GetLastError(); |
| 547 | } |
| 548 | |
| 549 | |
| 550 | /* |
| 551 | * Close token and restore error |
| 552 | */ |
| 553 | CloseHandle(hToken); |
| 554 | SetLastError(error); |
| 555 | |
| 556 | return hProcess; |
| 557 | } |
| 558 | |
| 559 | /* convert jstring to C string */ |
| 560 | static void jstring_to_cstring(JNIEnv* env, jstring jstr, char* cstr, int len) { |
| 561 | jboolean isCopy; |
| 562 | const char* str; |
| 563 | |
| 564 | if (jstr == NULL) { |
| 565 | cstr[0] = '\0'; |
| 566 | } else { |
| 567 | str = JNU_GetStringPlatformChars(env, jstr, &isCopy); |
| 568 | strncpy(cstr, str, len); |
| 569 | cstr[len-1] = '\0'; |
| 570 | if (isCopy) { |
| 571 | JNU_ReleaseStringPlatformChars(env, jstr, str); |
| 572 | } |
| 573 | } |
| 574 | } |