J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1997-2007 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 | |
| 26 | #include <windows.h> |
| 27 | #include <io.h> |
| 28 | #include <process.h> |
| 29 | #include <stdlib.h> |
| 30 | #include <stdio.h> |
| 31 | #include <stdarg.h> |
| 32 | #include <string.h> |
| 33 | #include <sys/types.h> |
| 34 | #include <sys/stat.h> |
| 35 | #include <wtypes.h> |
| 36 | |
| 37 | #include <jni.h> |
| 38 | #include "java.h" |
| 39 | #include "version_comp.h" |
| 40 | |
| 41 | #define JVM_DLL "jvm.dll" |
| 42 | #define JAVA_DLL "java.dll" |
| 43 | #define CRT_DLL "msvcr71.dll" |
| 44 | |
| 45 | /* |
| 46 | * Prototypes. |
| 47 | */ |
| 48 | static jboolean GetPublicJREHome(char *path, jint pathsize); |
| 49 | static jboolean GetJVMPath(const char *jrepath, const char *jvmtype, |
| 50 | char *jvmpath, jint jvmpathsize); |
| 51 | static jboolean GetJREPath(char *path, jint pathsize); |
| 52 | |
| 53 | static jboolean _isjavaw = JNI_FALSE; |
| 54 | |
| 55 | void |
| 56 | SetJavaw() |
| 57 | { |
| 58 | _isjavaw = JNI_TRUE; |
| 59 | } |
| 60 | |
| 61 | jboolean |
| 62 | IsJavaw() |
| 63 | { |
| 64 | return _isjavaw; |
| 65 | } |
| 66 | |
| 67 | /* |
| 68 | * Returns the arch path, to get the current arch use the |
| 69 | * macro GetArch, nbits here is ignored for now. |
| 70 | */ |
| 71 | const char * |
| 72 | GetArchPath(int nbits) |
| 73 | { |
| 74 | #ifdef _M_AMD64 |
| 75 | return "amd64"; |
| 76 | #elif defined(_M_IA64) |
| 77 | return "ia64"; |
| 78 | #else |
| 79 | return "i386"; |
| 80 | #endif |
| 81 | } |
| 82 | |
| 83 | /* |
| 84 | * |
| 85 | */ |
| 86 | void |
| 87 | CreateExecutionEnvironment(int *_argc, |
| 88 | char ***_argv, |
| 89 | char jrepath[], |
| 90 | jint so_jrepath, |
| 91 | char jvmpath[], |
| 92 | jint so_jvmpath, |
| 93 | char **original_argv) { |
| 94 | char * jvmtype; |
| 95 | int i = 0; |
| 96 | char** pargv = *_argv; |
| 97 | int running = CURRENT_DATA_MODEL; |
| 98 | |
| 99 | int wanted = running; |
| 100 | |
| 101 | for (i = 0; i < *_argc ; i++) { |
| 102 | if (JLI_StrCmp(pargv[i], "-J-d64") == 0 || JLI_StrCmp(pargv[i], "-d64") == 0) { |
| 103 | wanted = 64; |
| 104 | continue; |
| 105 | } |
| 106 | if (JLI_StrCmp(pargv[i], "-J-d32") == 0 || JLI_StrCmp(pargv[i], "-d32") == 0) { |
| 107 | wanted = 32; |
| 108 | continue; |
| 109 | } |
| 110 | } |
| 111 | if (running != wanted) { |
| 112 | ReportErrorMessage(JRE_ERROR2, wanted); |
| 113 | exit(1); |
| 114 | } |
| 115 | |
| 116 | /* Find out where the JRE is that we will be using. */ |
| 117 | if (!GetJREPath(jrepath, so_jrepath)) { |
| 118 | ReportErrorMessage(JRE_ERROR1); |
| 119 | exit(2); |
| 120 | } |
| 121 | |
| 122 | /* Find the specified JVM type */ |
| 123 | if (ReadKnownVMs(jrepath, (char*)GetArch(), JNI_FALSE) < 1) { |
| 124 | ReportErrorMessage(CFG_ERROR7); |
| 125 | exit(1); |
| 126 | } |
| 127 | jvmtype = CheckJvmType(_argc, _argv, JNI_FALSE); |
| 128 | |
| 129 | jvmpath[0] = '\0'; |
| 130 | if (!GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath)) { |
| 131 | ReportErrorMessage(CFG_ERROR8, jvmtype, jvmpath); |
| 132 | exit(4); |
| 133 | } |
| 134 | /* If we got here, jvmpath has been correctly initialized. */ |
| 135 | |
| 136 | } |
| 137 | |
| 138 | /* |
| 139 | * Find path to JRE based on .exe's location or registry settings. |
| 140 | */ |
| 141 | jboolean |
| 142 | GetJREPath(char *path, jint pathsize) |
| 143 | { |
| 144 | char javadll[MAXPATHLEN]; |
| 145 | struct stat s; |
| 146 | |
| 147 | if (GetApplicationHome(path, pathsize)) { |
| 148 | /* Is JRE co-located with the application? */ |
| 149 | sprintf(javadll, "%s\\bin\\" JAVA_DLL, path); |
| 150 | if (stat(javadll, &s) == 0) { |
| 151 | goto found; |
| 152 | } |
| 153 | |
| 154 | /* Does this app ship a private JRE in <apphome>\jre directory? */ |
| 155 | sprintf(javadll, "%s\\jre\\bin\\" JAVA_DLL, path); |
| 156 | if (stat(javadll, &s) == 0) { |
| 157 | JLI_StrCat(path, "\\jre"); |
| 158 | goto found; |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | /* Look for a public JRE on this machine. */ |
| 163 | if (GetPublicJREHome(path, pathsize)) { |
| 164 | goto found; |
| 165 | } |
| 166 | |
| 167 | ReportErrorMessage(JRE_ERROR8 JAVA_DLL); |
| 168 | return JNI_FALSE; |
| 169 | |
| 170 | found: |
| 171 | JLI_TraceLauncher("JRE path is %s\n", path); |
| 172 | return JNI_TRUE; |
| 173 | } |
| 174 | |
| 175 | /* |
| 176 | * Given a JRE location and a JVM type, construct what the name the |
| 177 | * JVM shared library will be. Return true, if such a library |
| 178 | * exists, false otherwise. |
| 179 | */ |
| 180 | static jboolean |
| 181 | GetJVMPath(const char *jrepath, const char *jvmtype, |
| 182 | char *jvmpath, jint jvmpathsize) |
| 183 | { |
| 184 | struct stat s; |
| 185 | if (JLI_StrChr(jvmtype, '/') || JLI_StrChr(jvmtype, '\\')) { |
| 186 | sprintf(jvmpath, "%s\\" JVM_DLL, jvmtype); |
| 187 | } else { |
| 188 | sprintf(jvmpath, "%s\\bin\\%s\\" JVM_DLL, jrepath, jvmtype); |
| 189 | } |
| 190 | if (stat(jvmpath, &s) == 0) { |
| 191 | return JNI_TRUE; |
| 192 | } else { |
| 193 | return JNI_FALSE; |
| 194 | } |
| 195 | } |
| 196 | |
| 197 | /* |
| 198 | * Load a jvm from "jvmpath" and initialize the invocation functions. |
| 199 | */ |
| 200 | jboolean |
| 201 | LoadJavaVM(const char *jvmpath, InvocationFunctions *ifn) |
| 202 | { |
| 203 | HINSTANCE handle; |
| 204 | char crtpath[MAXPATHLEN]; |
| 205 | |
| 206 | JLI_TraceLauncher("JVM path is %s\n", jvmpath); |
| 207 | |
| 208 | /* |
| 209 | * The Microsoft C Runtime Library needs to be loaded first. A copy is |
| 210 | * assumed to be present in the "JRE path" directory. If it is not found |
| 211 | * there (or "JRE path" fails to resolve), skip the explicit load and let |
| 212 | * nature take its course, which is likely to be a failure to execute. |
| 213 | */ |
| 214 | if (GetJREPath(crtpath, MAXPATHLEN)) { |
| 215 | (void)JLI_StrCat(crtpath, "\\bin\\" CRT_DLL); /* Add crt dll */ |
| 216 | JLI_TraceLauncher("CRT path is %s\n", crtpath); |
| 217 | if (_access(crtpath, 0) == 0) { |
| 218 | if (LoadLibrary(crtpath) == 0) { |
| 219 | ReportErrorMessage(DLL_ERROR4, crtpath); |
| 220 | return JNI_FALSE; |
| 221 | } |
| 222 | } |
| 223 | } |
| 224 | |
| 225 | /* Load the Java VM DLL */ |
| 226 | if ((handle = LoadLibrary(jvmpath)) == 0) { |
| 227 | ReportErrorMessage(DLL_ERROR4, (char *)jvmpath); |
| 228 | return JNI_FALSE; |
| 229 | } |
| 230 | |
| 231 | /* Now get the function addresses */ |
| 232 | ifn->CreateJavaVM = |
| 233 | (void *)GetProcAddress(handle, "JNI_CreateJavaVM"); |
| 234 | ifn->GetDefaultJavaVMInitArgs = |
| 235 | (void *)GetProcAddress(handle, "JNI_GetDefaultJavaVMInitArgs"); |
| 236 | if (ifn->CreateJavaVM == 0 || ifn->GetDefaultJavaVMInitArgs == 0) { |
| 237 | ReportErrorMessage(JNI_ERROR1, (char *)jvmpath); |
| 238 | return JNI_FALSE; |
| 239 | } |
| 240 | |
| 241 | return JNI_TRUE; |
| 242 | } |
| 243 | |
| 244 | /* |
| 245 | * If app is "c:\foo\bin\javac", then put "c:\foo" into buf. |
| 246 | */ |
| 247 | jboolean |
| 248 | GetApplicationHome(char *buf, jint bufsize) |
| 249 | { |
| 250 | char *cp; |
| 251 | GetModuleFileName(0, buf, bufsize); |
| 252 | *JLI_StrRChr(buf, '\\') = '\0'; /* remove .exe file name */ |
| 253 | if ((cp = JLI_StrRChr(buf, '\\')) == 0) { |
| 254 | /* This happens if the application is in a drive root, and |
| 255 | * there is no bin directory. */ |
| 256 | buf[0] = '\0'; |
| 257 | return JNI_FALSE; |
| 258 | } |
| 259 | *cp = '\0'; /* remove the bin\ part */ |
| 260 | return JNI_TRUE; |
| 261 | } |
| 262 | |
| 263 | /* |
| 264 | * Helpers to look in the registry for a public JRE. |
| 265 | */ |
| 266 | /* Same for 1.5.0, 1.5.1, 1.5.2 etc. */ |
| 267 | #define JRE_KEY "Software\\JavaSoft\\Java Runtime Environment" |
| 268 | |
| 269 | static jboolean |
| 270 | GetStringFromRegistry(HKEY key, const char *name, char *buf, jint bufsize) |
| 271 | { |
| 272 | DWORD type, size; |
| 273 | |
| 274 | if (RegQueryValueEx(key, name, 0, &type, 0, &size) == 0 |
| 275 | && type == REG_SZ |
| 276 | && (size < (unsigned int)bufsize)) { |
| 277 | if (RegQueryValueEx(key, name, 0, 0, buf, &size) == 0) { |
| 278 | return JNI_TRUE; |
| 279 | } |
| 280 | } |
| 281 | return JNI_FALSE; |
| 282 | } |
| 283 | |
| 284 | static jboolean |
| 285 | GetPublicJREHome(char *buf, jint bufsize) |
| 286 | { |
| 287 | HKEY key, subkey; |
| 288 | char version[MAXPATHLEN]; |
| 289 | |
| 290 | /* |
| 291 | * Note: There is a very similar implementation of the following |
| 292 | * registry reading code in the Windows java control panel (javacp.cpl). |
| 293 | * If there are bugs here, a similar bug probably exists there. Hence, |
| 294 | * changes here require inspection there. |
| 295 | */ |
| 296 | |
| 297 | /* Find the current version of the JRE */ |
| 298 | if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, JRE_KEY, 0, KEY_READ, &key) != 0) { |
| 299 | ReportErrorMessage(REG_ERROR1, JRE_KEY); |
| 300 | return JNI_FALSE; |
| 301 | } |
| 302 | |
| 303 | if (!GetStringFromRegistry(key, "CurrentVersion", |
| 304 | version, sizeof(version))) { |
| 305 | ReportErrorMessage(REG_ERROR2, JRE_KEY); |
| 306 | RegCloseKey(key); |
| 307 | return JNI_FALSE; |
| 308 | } |
| 309 | |
| 310 | if (JLI_StrCmp(version, GetDotVersion()) != 0) { |
| 311 | ReportErrorMessage(REG_ERROR3, JRE_KEY, version, GetDotVersion() |
| 312 | ); |
| 313 | RegCloseKey(key); |
| 314 | return JNI_FALSE; |
| 315 | } |
| 316 | |
| 317 | /* Find directory where the current version is installed. */ |
| 318 | if (RegOpenKeyEx(key, version, 0, KEY_READ, &subkey) != 0) { |
| 319 | ReportErrorMessage(REG_ERROR1, JRE_KEY, version); |
| 320 | RegCloseKey(key); |
| 321 | return JNI_FALSE; |
| 322 | } |
| 323 | |
| 324 | if (!GetStringFromRegistry(subkey, "JavaHome", buf, bufsize)) { |
| 325 | ReportErrorMessage(REG_ERROR4, JRE_KEY, version); |
| 326 | RegCloseKey(key); |
| 327 | RegCloseKey(subkey); |
| 328 | return JNI_FALSE; |
| 329 | } |
| 330 | |
| 331 | if (JLI_IsTraceLauncher()) { |
| 332 | char micro[MAXPATHLEN]; |
| 333 | if (!GetStringFromRegistry(subkey, "MicroVersion", micro, |
| 334 | sizeof(micro))) { |
| 335 | printf("Warning: Can't read MicroVersion\n"); |
| 336 | micro[0] = '\0'; |
| 337 | } |
| 338 | printf("Version major.minor.micro = %s.%s\n", version, micro); |
| 339 | } |
| 340 | |
| 341 | RegCloseKey(key); |
| 342 | RegCloseKey(subkey); |
| 343 | return JNI_TRUE; |
| 344 | } |
| 345 | |
| 346 | /* |
| 347 | * Support for doing cheap, accurate interval timing. |
| 348 | */ |
| 349 | static jboolean counterAvailable = JNI_FALSE; |
| 350 | static jboolean counterInitialized = JNI_FALSE; |
| 351 | static LARGE_INTEGER counterFrequency; |
| 352 | |
| 353 | jlong CounterGet() |
| 354 | { |
| 355 | LARGE_INTEGER count; |
| 356 | |
| 357 | if (!counterInitialized) { |
| 358 | counterAvailable = QueryPerformanceFrequency(&counterFrequency); |
| 359 | counterInitialized = JNI_TRUE; |
| 360 | } |
| 361 | if (!counterAvailable) { |
| 362 | return 0; |
| 363 | } |
| 364 | QueryPerformanceCounter(&count); |
| 365 | return (jlong)(count.QuadPart); |
| 366 | } |
| 367 | |
| 368 | jlong Counter2Micros(jlong counts) |
| 369 | { |
| 370 | if (!counterAvailable || !counterInitialized) { |
| 371 | return 0; |
| 372 | } |
| 373 | return (counts * 1000 * 1000)/counterFrequency.QuadPart; |
| 374 | } |
| 375 | |
| 376 | void |
| 377 | ReportErrorMessage(const char* fmt, ...) { |
| 378 | va_list vl; |
| 379 | va_start(vl,fmt); |
| 380 | |
| 381 | if (IsJavaw()) { |
| 382 | char *message; |
| 383 | |
| 384 | /* get the length of the string we need */ |
| 385 | int n = _vscprintf(fmt, vl); |
| 386 | |
| 387 | message = (char *)JLI_MemAlloc(n + 1); |
| 388 | _vsnprintf(message, n, fmt, vl); |
| 389 | message[n]='\0'; |
| 390 | MessageBox(NULL, message, "Java Virtual Machine Launcher", |
| 391 | (MB_OK|MB_ICONSTOP|MB_APPLMODAL)); |
| 392 | JLI_MemFree(message); |
| 393 | } else { |
| 394 | vfprintf(stderr, fmt, vl); |
| 395 | fprintf(stderr, "\n"); |
| 396 | } |
| 397 | va_end(vl); |
| 398 | } |
| 399 | |
| 400 | /* |
| 401 | * Just like ReportErrorMessage, except that it concatenates the system |
| 402 | * error message if any, its upto the calling routine to correctly |
| 403 | * format the separation of the messages. |
| 404 | */ |
| 405 | void |
| 406 | ReportErrorMessageSys(const char *fmt, ...) |
| 407 | { |
| 408 | va_list vl; |
| 409 | |
| 410 | int save_errno = errno; |
| 411 | DWORD errval; |
| 412 | jboolean freeit = JNI_FALSE; |
| 413 | char *errtext = NULL; |
| 414 | |
| 415 | va_start(vl, fmt); |
| 416 | |
| 417 | if ((errval = GetLastError()) != 0) { /* Platform SDK / DOS Error */ |
| 418 | int n = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM| |
| 419 | FORMAT_MESSAGE_IGNORE_INSERTS|FORMAT_MESSAGE_ALLOCATE_BUFFER, |
| 420 | NULL, errval, 0, (LPTSTR)&errtext, 0, NULL); |
| 421 | if (errtext == NULL || n == 0) { /* Paranoia check */ |
| 422 | errtext = ""; |
| 423 | n = 0; |
| 424 | } else { |
| 425 | freeit = JNI_TRUE; |
| 426 | if (n > 2) { /* Drop final CR, LF */ |
| 427 | if (errtext[n - 1] == '\n') n--; |
| 428 | if (errtext[n - 1] == '\r') n--; |
| 429 | errtext[n] = '\0'; |
| 430 | } |
| 431 | } |
| 432 | } else { /* C runtime error that has no corresponding DOS error code */ |
| 433 | errtext = strerror(save_errno); |
| 434 | } |
| 435 | |
| 436 | if (IsJavaw()) { |
| 437 | char *message; |
| 438 | int mlen; |
| 439 | /* get the length of the string we need */ |
| 440 | int len = mlen = _vscprintf(fmt, vl) + 1; |
| 441 | if (freeit) { |
| 442 | mlen += JLI_StrLen(errtext); |
| 443 | } |
| 444 | |
| 445 | message = (char *)JLI_MemAlloc(mlen); |
| 446 | _vsnprintf(message, len, fmt, vl); |
| 447 | message[len]='\0'; |
| 448 | |
| 449 | if (freeit) { |
| 450 | JLI_StrCat(message, errtext); |
| 451 | } |
| 452 | |
| 453 | MessageBox(NULL, message, "Java Virtual Machine Launcher", |
| 454 | (MB_OK|MB_ICONSTOP|MB_APPLMODAL)); |
| 455 | |
| 456 | JLI_MemFree(message); |
| 457 | } else { |
| 458 | vfprintf(stderr, fmt, vl); |
| 459 | if (freeit) { |
| 460 | fprintf(stderr, "%s", errtext); |
| 461 | } |
| 462 | } |
| 463 | if (freeit) { |
| 464 | (void)LocalFree((HLOCAL)errtext); |
| 465 | } |
| 466 | va_end(vl); |
| 467 | } |
| 468 | |
| 469 | void ReportExceptionDescription(JNIEnv * env) { |
| 470 | if (IsJavaw()) { |
| 471 | /* |
| 472 | * This code should be replaced by code which opens a window with |
| 473 | * the exception detail message, for now atleast put a dialog up. |
| 474 | */ |
| 475 | MessageBox(NULL, "A Java Exception has occurred.", "Java Virtual Machine Launcher", |
| 476 | (MB_OK|MB_ICONSTOP|MB_APPLMODAL)); |
| 477 | } else { |
| 478 | (*env)->ExceptionDescribe(env); |
| 479 | } |
| 480 | } |
| 481 | |
| 482 | jboolean |
| 483 | ServerClassMachine() { |
| 484 | return (GetErgoPolicy() == ALWAYS_SERVER_CLASS) ? JNI_TRUE : JNI_FALSE; |
| 485 | } |
| 486 | |
| 487 | /* |
| 488 | * Determine if there is an acceptable JRE in the registry directory top_key. |
| 489 | * Upon locating the "best" one, return a fully qualified path to it. |
| 490 | * "Best" is defined as the most advanced JRE meeting the constraints |
| 491 | * contained in the manifest_info. If no JRE in this directory meets the |
| 492 | * constraints, return NULL. |
| 493 | * |
| 494 | * It doesn't matter if we get an error reading the registry, or we just |
| 495 | * don't find anything interesting in the directory. We just return NULL |
| 496 | * in either case. |
| 497 | */ |
| 498 | static char * |
| 499 | ProcessDir(manifest_info* info, HKEY top_key) { |
| 500 | DWORD index = 0; |
| 501 | HKEY ver_key; |
| 502 | char name[MAXNAMELEN]; |
| 503 | int len; |
| 504 | char *best = NULL; |
| 505 | |
| 506 | /* |
| 507 | * Enumerate "<top_key>/SOFTWARE/JavaSoft/Java Runtime Environment" |
| 508 | * searching for the best available version. |
| 509 | */ |
| 510 | while (RegEnumKey(top_key, index, name, MAXNAMELEN) == ERROR_SUCCESS) { |
| 511 | index++; |
| 512 | if (JLI_AcceptableRelease(name, info->jre_version)) |
| 513 | if ((best == NULL) || (JLI_ExactVersionId(name, best) > 0)) { |
| 514 | if (best != NULL) |
| 515 | JLI_MemFree(best); |
| 516 | best = JLI_StringDup(name); |
| 517 | } |
| 518 | } |
| 519 | |
| 520 | /* |
| 521 | * Extract "JavaHome" from the "best" registry directory and return |
| 522 | * that path. If no appropriate version was located, or there is an |
| 523 | * error in extracting the "JavaHome" string, return null. |
| 524 | */ |
| 525 | if (best == NULL) |
| 526 | return (NULL); |
| 527 | else { |
| 528 | if (RegOpenKeyEx(top_key, best, 0, KEY_READ, &ver_key) |
| 529 | != ERROR_SUCCESS) { |
| 530 | JLI_MemFree(best); |
| 531 | if (ver_key != NULL) |
| 532 | RegCloseKey(ver_key); |
| 533 | return (NULL); |
| 534 | } |
| 535 | JLI_MemFree(best); |
| 536 | len = MAXNAMELEN; |
| 537 | if (RegQueryValueEx(ver_key, "JavaHome", NULL, NULL, (LPBYTE)name, &len) |
| 538 | != ERROR_SUCCESS) { |
| 539 | if (ver_key != NULL) |
| 540 | RegCloseKey(ver_key); |
| 541 | return (NULL); |
| 542 | } |
| 543 | if (ver_key != NULL) |
| 544 | RegCloseKey(ver_key); |
| 545 | return (JLI_StringDup(name)); |
| 546 | } |
| 547 | } |
| 548 | |
| 549 | /* |
| 550 | * This is the global entry point. It examines the host for the optimal |
| 551 | * JRE to be used by scanning a set of registry entries. This set of entries |
| 552 | * is hardwired on Windows as "Software\JavaSoft\Java Runtime Environment" |
| 553 | * under the set of roots "{ HKEY_CURRENT_USER, HKEY_LOCAL_MACHINE }". |
| 554 | * |
| 555 | * This routine simply opens each of these registry directories before passing |
| 556 | * control onto ProcessDir(). |
| 557 | */ |
| 558 | char * |
| 559 | LocateJRE(manifest_info* info) { |
| 560 | HKEY key = NULL; |
| 561 | char *path; |
| 562 | int key_index; |
| 563 | HKEY root_keys[2] = { HKEY_CURRENT_USER, HKEY_LOCAL_MACHINE }; |
| 564 | |
| 565 | for (key_index = 0; key_index <= 1; key_index++) { |
| 566 | if (RegOpenKeyEx(root_keys[key_index], JRE_KEY, 0, KEY_READ, &key) |
| 567 | == ERROR_SUCCESS) |
| 568 | if ((path = ProcessDir(info, key)) != NULL) { |
| 569 | if (key != NULL) |
| 570 | RegCloseKey(key); |
| 571 | return (path); |
| 572 | } |
| 573 | if (key != NULL) |
| 574 | RegCloseKey(key); |
| 575 | } |
| 576 | return NULL; |
| 577 | } |
| 578 | |
| 579 | /* |
| 580 | * Local helper routine to isolate a single token (option or argument) |
| 581 | * from the command line. |
| 582 | * |
| 583 | * This routine accepts a pointer to a character pointer. The first |
| 584 | * token (as defined by MSDN command-line argument syntax) is isolated |
| 585 | * from that string. |
| 586 | * |
| 587 | * Upon return, the input character pointer pointed to by the parameter s |
| 588 | * is updated to point to the remainding, unscanned, portion of the string, |
| 589 | * or to a null character if the entire string has been consummed. |
| 590 | * |
| 591 | * This function returns a pointer to a null-terminated string which |
| 592 | * contains the isolated first token, or to the null character if no |
| 593 | * token could be isolated. |
| 594 | * |
| 595 | * Note the side effect of modifying the input string s by the insertion |
| 596 | * of a null character, making it two strings. |
| 597 | * |
| 598 | * See "Parsing C Command-Line Arguments" in the MSDN Library for the |
| 599 | * parsing rule details. The rule summary from that specification is: |
| 600 | * |
| 601 | * * Arguments are delimited by white space, which is either a space or a tab. |
| 602 | * |
| 603 | * * A string surrounded by double quotation marks is interpreted as a single |
| 604 | * argument, regardless of white space contained within. A quoted string can |
| 605 | * be embedded in an argument. Note that the caret (^) is not recognized as |
| 606 | * an escape character or delimiter. |
| 607 | * |
| 608 | * * A double quotation mark preceded by a backslash, \", is interpreted as a |
| 609 | * literal double quotation mark ("). |
| 610 | * |
| 611 | * * Backslashes are interpreted literally, unless they immediately precede a |
| 612 | * double quotation mark. |
| 613 | * |
| 614 | * * If an even number of backslashes is followed by a double quotation mark, |
| 615 | * then one backslash (\) is placed in the argv array for every pair of |
| 616 | * backslashes (\\), and the double quotation mark (") is interpreted as a |
| 617 | * string delimiter. |
| 618 | * |
| 619 | * * If an odd number of backslashes is followed by a double quotation mark, |
| 620 | * then one backslash (\) is placed in the argv array for every pair of |
| 621 | * backslashes (\\) and the double quotation mark is interpreted as an |
| 622 | * escape sequence by the remaining backslash, causing a literal double |
| 623 | * quotation mark (") to be placed in argv. |
| 624 | */ |
| 625 | static char* |
| 626 | nextarg(char** s) { |
| 627 | char *p = *s; |
| 628 | char *head; |
| 629 | int slashes = 0; |
| 630 | int inquote = 0; |
| 631 | |
| 632 | /* |
| 633 | * Strip leading whitespace, which MSDN defines as only space or tab. |
| 634 | * (Hence, no locale specific "isspace" here.) |
| 635 | */ |
| 636 | while (*p != (char)0 && (*p == ' ' || *p == '\t')) |
| 637 | p++; |
| 638 | head = p; /* Save the start of the token to return */ |
| 639 | |
| 640 | /* |
| 641 | * Isolate a token from the command line. |
| 642 | */ |
| 643 | while (*p != (char)0 && (inquote || !(*p == ' ' || *p == '\t'))) { |
| 644 | if (*p == '\\' && *(p+1) == '"' && slashes % 2 == 0) |
| 645 | p++; |
| 646 | else if (*p == '"') |
| 647 | inquote = !inquote; |
| 648 | slashes = (*p++ == '\\') ? slashes + 1 : 0; |
| 649 | } |
| 650 | |
| 651 | /* |
| 652 | * If the token isolated isn't already terminated in a "char zero", |
| 653 | * then replace the whitespace character with one and move to the |
| 654 | * next character. |
| 655 | */ |
| 656 | if (*p != (char)0) |
| 657 | *p++ = (char)0; |
| 658 | |
| 659 | /* |
| 660 | * Update the parameter to point to the head of the remaining string |
| 661 | * reflecting the command line and return a pointer to the leading |
| 662 | * token which was isolated from the command line. |
| 663 | */ |
| 664 | *s = p; |
| 665 | return (head); |
| 666 | } |
| 667 | |
| 668 | /* |
| 669 | * Local helper routine to return a string equivalent to the input string |
| 670 | * s, but with quotes removed so the result is a string as would be found |
| 671 | * in argv[]. The returned string should be freed by a call to JLI_MemFree(). |
| 672 | * |
| 673 | * The rules for quoting (and escaped quotes) are: |
| 674 | * |
| 675 | * 1 A double quotation mark preceded by a backslash, \", is interpreted as a |
| 676 | * literal double quotation mark ("). |
| 677 | * |
| 678 | * 2 Backslashes are interpreted literally, unless they immediately precede a |
| 679 | * double quotation mark. |
| 680 | * |
| 681 | * 3 If an even number of backslashes is followed by a double quotation mark, |
| 682 | * then one backslash (\) is placed in the argv array for every pair of |
| 683 | * backslashes (\\), and the double quotation mark (") is interpreted as a |
| 684 | * string delimiter. |
| 685 | * |
| 686 | * 4 If an odd number of backslashes is followed by a double quotation mark, |
| 687 | * then one backslash (\) is placed in the argv array for every pair of |
| 688 | * backslashes (\\) and the double quotation mark is interpreted as an |
| 689 | * escape sequence by the remaining backslash, causing a literal double |
| 690 | * quotation mark (") to be placed in argv. |
| 691 | */ |
| 692 | static char* |
| 693 | unquote(const char *s) { |
| 694 | const char *p = s; /* Pointer to the tail of the original string */ |
| 695 | char *un = (char*)JLI_MemAlloc(JLI_StrLen(s) + 1); /* Ptr to unquoted string */ |
| 696 | char *pun = un; /* Pointer to the tail of the unquoted string */ |
| 697 | |
| 698 | while (*p != '\0') { |
| 699 | if (*p == '"') { |
| 700 | p++; |
| 701 | } else if (*p == '\\') { |
| 702 | const char *q = p + JLI_StrSpn(p,"\\"); |
| 703 | if (*q == '"') |
| 704 | do { |
| 705 | *pun++ = '\\'; |
| 706 | p += 2; |
| 707 | } while (*p == '\\' && p < q); |
| 708 | else |
| 709 | while (p < q) |
| 710 | *pun++ = *p++; |
| 711 | } else { |
| 712 | *pun++ = *p++; |
| 713 | } |
| 714 | } |
| 715 | *pun = '\0'; |
| 716 | return un; |
| 717 | } |
| 718 | |
| 719 | /* |
| 720 | * Given a path to a jre to execute, this routine checks if this process |
| 721 | * is indeed that jre. If not, it exec's that jre. |
| 722 | * |
| 723 | * We want to actually check the paths rather than just the version string |
| 724 | * built into the executable, so that given version specification will yield |
| 725 | * the exact same Java environment, regardless of the version of the arbitrary |
| 726 | * launcher we start with. |
| 727 | */ |
| 728 | void |
| 729 | ExecJRE(char *jre, char **argv) { |
| 730 | int len; |
| 731 | char path[MAXPATHLEN + 1]; |
| 732 | |
| 733 | const char *progname = GetProgramName(); |
| 734 | |
| 735 | /* |
| 736 | * Resolve the real path to the currently running launcher. |
| 737 | */ |
| 738 | len = GetModuleFileName(NULL, path, MAXPATHLEN + 1); |
| 739 | if (len == 0 || len > MAXPATHLEN) { |
| 740 | ReportErrorMessageSys(JRE_ERROR9, progname); |
| 741 | exit(1); |
| 742 | } |
| 743 | |
| 744 | JLI_TraceLauncher("ExecJRE: old: %s\n", path); |
| 745 | JLI_TraceLauncher("ExecJRE: new: %s\n", jre); |
| 746 | |
| 747 | /* |
| 748 | * If the path to the selected JRE directory is a match to the initial |
| 749 | * portion of the path to the currently executing JRE, we have a winner! |
| 750 | * If so, just return. |
| 751 | */ |
| 752 | if (JLI_StrNCaseCmp(jre, path, JLI_StrLen(jre)) == 0) |
| 753 | return; /* I am the droid you were looking for */ |
| 754 | |
| 755 | /* |
| 756 | * If this isn't the selected version, exec the selected version. |
| 757 | */ |
| 758 | (void)JLI_StrCat(JLI_StrCat(JLI_StrCpy(path, jre), "\\bin\\"), progname); |
| 759 | (void)JLI_StrCat(path, ".exe"); |
| 760 | |
| 761 | /* |
| 762 | * Although Windows has an execv() entrypoint, it doesn't actually |
| 763 | * overlay a process: it can only create a new process and terminate |
| 764 | * the old process. Therefore, any processes waiting on the initial |
| 765 | * process wake up and they shouldn't. Hence, a chain of pseudo-zombie |
| 766 | * processes must be retained to maintain the proper wait semantics. |
| 767 | * Fortunately the image size of the launcher isn't too large at this |
| 768 | * time. |
| 769 | * |
| 770 | * If it weren't for this semantic flaw, the code below would be ... |
| 771 | * |
| 772 | * execv(path, argv); |
| 773 | * ReportErrorMessage("Error: Exec of %s failed\n", path); |
| 774 | * exit(1); |
| 775 | * |
| 776 | * The incorrect exec semantics could be addressed by: |
| 777 | * |
| 778 | * exit((int)spawnv(_P_WAIT, path, argv)); |
| 779 | * |
| 780 | * Unfortunately, a bug in Windows spawn/exec impementation prevents |
| 781 | * this from completely working. All the Windows POSIX process creation |
| 782 | * interfaces are implemented as wrappers around the native Windows |
| 783 | * function CreateProcess(). CreateProcess() takes a single string |
| 784 | * to specify command line options and arguments, so the POSIX routine |
| 785 | * wrappers build a single string from the argv[] array and in the |
| 786 | * process, any quoting information is lost. |
| 787 | * |
| 788 | * The solution to this to get the original command line, to process it |
| 789 | * to remove the new multiple JRE options (if any) as was done for argv |
| 790 | * in the common SelectVersion() routine and finally to pass it directly |
| 791 | * to the native CreateProcess() Windows process control interface. |
| 792 | */ |
| 793 | { |
| 794 | char *cmdline; |
| 795 | char *p; |
| 796 | char *np; |
| 797 | char *ocl; |
| 798 | char *ccl; |
| 799 | char *unquoted; |
| 800 | DWORD exitCode; |
| 801 | STARTUPINFO si; |
| 802 | PROCESS_INFORMATION pi; |
| 803 | |
| 804 | /* |
| 805 | * The following code block gets and processes the original command |
| 806 | * line, replacing the argv[0] equivalent in the command line with |
| 807 | * the path to the new executable and removing the appropriate |
| 808 | * Multiple JRE support options. Note that similar logic exists |
| 809 | * in the platform independent SelectVersion routine, but is |
| 810 | * replicated here due to the syntax of CreateProcess(). |
| 811 | * |
| 812 | * The magic "+ 4" characters added to the command line length are |
| 813 | * 2 possible quotes around the path (argv[0]), a space after the |
| 814 | * path and a terminating null character. |
| 815 | */ |
| 816 | ocl = GetCommandLine(); |
| 817 | np = ccl = JLI_StringDup(ocl); |
| 818 | p = nextarg(&np); /* Discard argv[0] */ |
| 819 | cmdline = (char *)JLI_MemAlloc(JLI_StrLen(path) + JLI_StrLen(np) + 4); |
| 820 | if (JLI_StrChr(path, (int)' ') == NULL && JLI_StrChr(path, (int)'\t') == NULL) |
| 821 | cmdline = JLI_StrCpy(cmdline, path); |
| 822 | else |
| 823 | cmdline = JLI_StrCat(JLI_StrCat(JLI_StrCpy(cmdline, "\""), path), "\""); |
| 824 | |
| 825 | while (*np != (char)0) { /* While more command-line */ |
| 826 | p = nextarg(&np); |
| 827 | if (*p != (char)0) { /* If a token was isolated */ |
| 828 | unquoted = unquote(p); |
| 829 | if (*unquoted == '-') { /* Looks like an option */ |
| 830 | if (JLI_StrCmp(unquoted, "-classpath") == 0 || |
| 831 | JLI_StrCmp(unquoted, "-cp") == 0) { /* Unique cp syntax */ |
| 832 | cmdline = JLI_StrCat(JLI_StrCat(cmdline, " "), p); |
| 833 | p = nextarg(&np); |
| 834 | if (*p != (char)0) /* If a token was isolated */ |
| 835 | cmdline = JLI_StrCat(JLI_StrCat(cmdline, " "), p); |
| 836 | } else if (JLI_StrNCmp(unquoted, "-version:", 9) != 0 && |
| 837 | JLI_StrCmp(unquoted, "-jre-restrict-search") != 0 && |
| 838 | JLI_StrCmp(unquoted, "-no-jre-restrict-search") != 0) { |
| 839 | cmdline = JLI_StrCat(JLI_StrCat(cmdline, " "), p); |
| 840 | } |
| 841 | } else { /* End of options */ |
| 842 | cmdline = JLI_StrCat(JLI_StrCat(cmdline, " "), p); |
| 843 | cmdline = JLI_StrCat(JLI_StrCat(cmdline, " "), np); |
| 844 | JLI_MemFree((void *)unquoted); |
| 845 | break; |
| 846 | } |
| 847 | JLI_MemFree((void *)unquoted); |
| 848 | } |
| 849 | } |
| 850 | JLI_MemFree((void *)ccl); |
| 851 | |
| 852 | if (JLI_IsTraceLauncher()) { |
| 853 | np = ccl = JLI_StringDup(cmdline); |
| 854 | p = nextarg(&np); |
| 855 | printf("ReExec Command: %s (%s)\n", path, p); |
| 856 | printf("ReExec Args: %s\n", np); |
| 857 | JLI_MemFree((void *)ccl); |
| 858 | } |
| 859 | (void)fflush(stdout); |
| 860 | (void)fflush(stderr); |
| 861 | |
| 862 | /* |
| 863 | * The following code is modeled after a model presented in the |
| 864 | * Microsoft Technical Article "Moving Unix Applications to |
| 865 | * Windows NT" (March 6, 1994) and "Creating Processes" on MSDN |
| 866 | * (Februrary 2005). It approximates UNIX spawn semantics with |
| 867 | * the parent waiting for termination of the child. |
| 868 | */ |
| 869 | memset(&si, 0, sizeof(si)); |
| 870 | si.cb =sizeof(STARTUPINFO); |
| 871 | memset(&pi, 0, sizeof(pi)); |
| 872 | |
| 873 | if (!CreateProcess((LPCTSTR)path, /* executable name */ |
| 874 | (LPTSTR)cmdline, /* command line */ |
| 875 | (LPSECURITY_ATTRIBUTES)NULL, /* process security attr. */ |
| 876 | (LPSECURITY_ATTRIBUTES)NULL, /* thread security attr. */ |
| 877 | (BOOL)TRUE, /* inherits system handles */ |
| 878 | (DWORD)0, /* creation flags */ |
| 879 | (LPVOID)NULL, /* environment block */ |
| 880 | (LPCTSTR)NULL, /* current directory */ |
| 881 | (LPSTARTUPINFO)&si, /* (in) startup information */ |
| 882 | (LPPROCESS_INFORMATION)&pi)) { /* (out) process information */ |
| 883 | ReportErrorMessageSys(SYS_ERROR1, path); |
| 884 | exit(1); |
| 885 | } |
| 886 | |
| 887 | if (WaitForSingleObject(pi.hProcess, INFINITE) != WAIT_FAILED) { |
| 888 | if (GetExitCodeProcess(pi.hProcess, &exitCode) == FALSE) |
| 889 | exitCode = 1; |
| 890 | } else { |
| 891 | ReportErrorMessage(SYS_ERROR2); |
| 892 | exitCode = 1; |
| 893 | } |
| 894 | |
| 895 | CloseHandle(pi.hThread); |
| 896 | CloseHandle(pi.hProcess); |
| 897 | |
| 898 | exit(exitCode); |
| 899 | } |
| 900 | |
| 901 | } |
| 902 | |
| 903 | /* |
| 904 | * Wrapper for platform dependent unsetenv function. |
| 905 | */ |
| 906 | int |
| 907 | UnsetEnv(char *name) |
| 908 | { |
| 909 | int ret; |
| 910 | char *buf = JLI_MemAlloc(JLI_StrLen(name) + 2); |
| 911 | buf = JLI_StrCat(JLI_StrCpy(buf, name), "="); |
| 912 | ret = _putenv(buf); |
| 913 | JLI_MemFree(buf); |
| 914 | return (ret); |
| 915 | } |
| 916 | |
| 917 | /* --- Splash Screen shared library support --- */ |
| 918 | |
| 919 | static const char* SPLASHSCREEN_SO = "\\bin\\splashscreen.dll"; |
| 920 | |
| 921 | static HMODULE hSplashLib = NULL; |
| 922 | |
| 923 | void* SplashProcAddress(const char* name) { |
| 924 | char libraryPath[MAXPATHLEN]; /* some extra space for JLI_StrCat'ing SPLASHSCREEN_SO */ |
| 925 | |
| 926 | if (!GetJREPath(libraryPath, MAXPATHLEN)) { |
| 927 | return NULL; |
| 928 | } |
| 929 | if (JLI_StrLen(libraryPath)+JLI_StrLen(SPLASHSCREEN_SO) >= MAXPATHLEN) { |
| 930 | return NULL; |
| 931 | } |
| 932 | JLI_StrCat(libraryPath, SPLASHSCREEN_SO); |
| 933 | |
| 934 | if (!hSplashLib) { |
| 935 | hSplashLib = LoadLibrary(libraryPath); |
| 936 | } |
| 937 | if (hSplashLib) { |
| 938 | return GetProcAddress(hSplashLib, name); |
| 939 | } else { |
| 940 | return NULL; |
| 941 | } |
| 942 | } |
| 943 | |
| 944 | void SplashFreeLibrary() { |
| 945 | if (hSplashLib) { |
| 946 | FreeLibrary(hSplashLib); |
| 947 | hSplashLib = NULL; |
| 948 | } |
| 949 | } |
| 950 | |
| 951 | const char * |
| 952 | jlong_format_specifier() { |
| 953 | return "%I64d"; |
| 954 | } |
| 955 | |
| 956 | /* |
| 957 | * Block current thread and continue execution in a new thread |
| 958 | */ |
| 959 | int |
| 960 | ContinueInNewThread0(int (JNICALL *continuation)(void *), jlong stack_size, void * args) { |
| 961 | int rslt = 0; |
| 962 | unsigned thread_id; |
| 963 | |
| 964 | #ifndef STACK_SIZE_PARAM_IS_A_RESERVATION |
| 965 | #define STACK_SIZE_PARAM_IS_A_RESERVATION (0x10000) |
| 966 | #endif |
| 967 | |
| 968 | /* |
| 969 | * STACK_SIZE_PARAM_IS_A_RESERVATION is what we want, but it's not |
| 970 | * supported on older version of Windows. Try first with the flag; and |
| 971 | * if that fails try again without the flag. See MSDN document or HotSpot |
| 972 | * source (os_win32.cpp) for details. |
| 973 | */ |
| 974 | HANDLE thread_handle = |
| 975 | (HANDLE)_beginthreadex(NULL, |
| 976 | (unsigned)stack_size, |
| 977 | continuation, |
| 978 | args, |
| 979 | STACK_SIZE_PARAM_IS_A_RESERVATION, |
| 980 | &thread_id); |
| 981 | if (thread_handle == NULL) { |
| 982 | thread_handle = |
| 983 | (HANDLE)_beginthreadex(NULL, |
| 984 | (unsigned)stack_size, |
| 985 | continuation, |
| 986 | args, |
| 987 | 0, |
| 988 | &thread_id); |
| 989 | } |
| 990 | if (thread_handle) { |
| 991 | WaitForSingleObject(thread_handle, INFINITE); |
| 992 | GetExitCodeThread(thread_handle, &rslt); |
| 993 | CloseHandle(thread_handle); |
| 994 | } else { |
| 995 | rslt = continuation(args); |
| 996 | } |
| 997 | return rslt; |
| 998 | } |
| 999 | |
| 1000 | /* Linux only, empty on windows. */ |
| 1001 | void SetJavaLauncherPlatformProps() {} |