1 /* 2 * Copyright (c) 1998, 2017, Oracle and/or its affiliates. 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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 #include "java.h" 27 #include "jvm_md.h" 28 #include <dirent.h> 29 #include <dlfcn.h> 30 #include <fcntl.h> 31 #include <inttypes.h> 32 #include <stdio.h> 33 #include <string.h> 34 #include <stdlib.h> 35 #include <sys/stat.h> 36 #include <unistd.h> 37 #include <sys/types.h> 38 #include "manifest_info.h" 39 40 41 #define JVM_DLL "libjvm.so" 42 #define JAVA_DLL "libjava.so" 43 #ifdef AIX 44 #define LD_LIBRARY_PATH "LIBPATH" 45 #else 46 #define LD_LIBRARY_PATH "LD_LIBRARY_PATH" 47 #endif 48 49 /* help jettison the LD_LIBRARY_PATH settings in the future */ 50 #ifndef SETENV_REQUIRED 51 #define SETENV_REQUIRED 52 #endif 53 54 #ifdef __solaris__ 55 # include <sys/systeminfo.h> 56 # include <sys/elf.h> 57 # include <stdio.h> 58 #endif 59 60 /* 61 * Flowchart of launcher execs and options processing on unix 62 * 63 * The selection of the proper vm shared library to open depends on 64 * several classes of command line options, including vm "flavor" 65 * options (-client, -server) and the data model options, -d32 and 66 * -d64, as well as a version specification which may have come from 67 * the command line or from the manifest of an executable jar file. 68 * The vm selection options are not passed to the running 69 * virtual machine; they must be screened out by the launcher. 70 * 71 * The version specification (if any) is processed first by the 72 * platform independent routine SelectVersion. This may result in 73 * the exec of the specified launcher version. 74 * 75 * Previously the launcher modified the LD_LIBRARY_PATH appropriately for the 76 * desired data model path, regardless if data models matched or not. The 77 * launcher subsequently exec'ed the desired executable, in order to make the 78 * LD_LIBRARY_PATH path available, for the runtime linker. 79 * 80 * Now, in most cases,the launcher will dlopen the target libjvm.so. All 81 * required libraries are loaded by the runtime linker, using the 82 * $RPATH/$ORIGIN baked into the shared libraries at compile time. Therefore, 83 * in most cases, the launcher will only exec, if the data models are 84 * mismatched, and will not set any environment variables, regardless of the 85 * data models. 86 * 87 * However, if the environment contains a LD_LIBRARY_PATH, this will cause the 88 * launcher to inspect the LD_LIBRARY_PATH. The launcher will check 89 * a. if the LD_LIBRARY_PATH's first component is the path to the desired 90 * libjvm.so 91 * b. if any other libjvm.so is found in any of the paths. 92 * If case b is true, then the launcher will set the LD_LIBRARY_PATH to the 93 * desired JRE and reexec, in order to propagate the environment. 94 * 95 * Main 96 * (incoming argv) 97 * | 98 * \|/ 99 * CreateExecutionEnvironment 100 * (determines desired data model) 101 * | 102 * | 103 * \|/ 104 * Have Desired Model ? --> NO --> Exit(with error) 105 * | 106 * | 107 * \|/ 108 * YES 109 * | 110 * | 111 * \|/ 112 * CheckJvmType 113 * (removes -client, -server, etc.) 114 * | 115 * | 116 * \|/ 117 * TranslateDashJArgs... 118 * (Prepare to pass args to vm) 119 * | 120 * | 121 * \|/ 122 * ParseArguments 123 * (removes -d32 and -d64 if any, 124 * processes version options, 125 * creates argument list for vm, 126 * etc.) 127 * | 128 * | 129 * \|/ 130 * RequiresSetenv 131 * Is LD_LIBRARY_PATH 132 * and friends set ? --> NO --> Have Desired Model ? NO --> Error/Exit 133 * YES YES --> Continue 134 * | 135 * | 136 * \|/ 137 * Path is desired JRE ? YES --> Have Desired Model ? NO --> Error/Exit 138 * NO YES --> Continue 139 * | 140 * | 141 * \|/ 142 * Paths have well known 143 * jvm paths ? --> NO --> Have Desired Model ? NO --> Error/Exit 144 * YES YES --> Continue 145 * | 146 * | 147 * \|/ 148 * Does libjvm.so exit 149 * in any of them ? --> NO --> Have Desired Model ? NO --> Error/Exit 150 * YES YES --> Continue 151 * | 152 * | 153 * \|/ 154 * Set the LD_LIBRARY_PATH 155 * | 156 * | 157 * \|/ 158 * Re-exec 159 * | 160 * | 161 * \|/ 162 * Main 163 */ 164 165 /* Store the name of the executable once computed */ 166 static char *execname = NULL; 167 168 /* 169 * execname accessor from other parts of platform dependent logic 170 */ 171 const char * 172 GetExecName() { 173 return execname; 174 } 175 176 #ifdef SETENV_REQUIRED 177 static jboolean 178 JvmExists(const char *path) { 179 char tmp[PATH_MAX + 1]; 180 struct stat statbuf; 181 JLI_Snprintf(tmp, PATH_MAX, "%s/%s", path, JVM_DLL); 182 if (stat(tmp, &statbuf) == 0) { 183 return JNI_TRUE; 184 } 185 return JNI_FALSE; 186 } 187 /* 188 * contains a lib/{server,client}/libjvm.so ? 189 */ 190 static jboolean 191 ContainsLibJVM(const char *env) { 192 /* the usual suspects */ 193 char clientPattern[] = "lib/client"; 194 char serverPattern[] = "lib/server"; 195 char *envpath; 196 char *path; 197 jboolean clientPatternFound; 198 jboolean serverPatternFound; 199 200 /* fastest path */ 201 if (env == NULL) { 202 return JNI_FALSE; 203 } 204 205 /* to optimize for time, test if any of our usual suspects are present. */ 206 clientPatternFound = JLI_StrStr(env, clientPattern) != NULL; 207 serverPatternFound = JLI_StrStr(env, serverPattern) != NULL; 208 if (clientPatternFound == JNI_FALSE && serverPatternFound == JNI_FALSE) { 209 return JNI_FALSE; 210 } 211 212 /* 213 * we have a suspicious path component, check if it contains a libjvm.so 214 */ 215 envpath = JLI_StringDup(env); 216 for (path = JLI_StrTok(envpath, ":"); path != NULL; path = JLI_StrTok(NULL, ":")) { 217 if (clientPatternFound && JLI_StrStr(path, clientPattern) != NULL) { 218 if (JvmExists(path)) { 219 JLI_MemFree(envpath); 220 return JNI_TRUE; 221 } 222 } 223 if (serverPatternFound && JLI_StrStr(path, serverPattern) != NULL) { 224 if (JvmExists(path)) { 225 JLI_MemFree(envpath); 226 return JNI_TRUE; 227 } 228 } 229 } 230 JLI_MemFree(envpath); 231 return JNI_FALSE; 232 } 233 234 /* 235 * Test whether the environment variable needs to be set, see flowchart. 236 */ 237 static jboolean 238 RequiresSetenv(const char *jvmpath) { 239 char jpath[PATH_MAX + 1]; 240 char *llp; 241 char *dmllp = NULL; 242 char *p; /* a utility pointer */ 243 244 #ifdef AIX 245 /* We always have to set the LIBPATH on AIX because ld doesn't support $ORIGIN. */ 246 return JNI_TRUE; 247 #endif 248 249 llp = getenv("LD_LIBRARY_PATH"); 250 #ifdef __solaris__ 251 dmllp = getenv("LD_LIBRARY_PATH_64"); 252 #endif /* __solaris__ */ 253 /* no environment variable is a good environment variable */ 254 if (llp == NULL && dmllp == NULL) { 255 return JNI_FALSE; 256 } 257 #ifdef __linux 258 /* 259 * On linux, if a binary is running as sgid or suid, glibc sets 260 * LD_LIBRARY_PATH to the empty string for security purposes. (In contrast, 261 * on Solaris the LD_LIBRARY_PATH variable for a privileged binary does not 262 * lose its settings; but the dynamic linker does apply more scrutiny to the 263 * path.) The launcher uses the value of LD_LIBRARY_PATH to prevent an exec 264 * loop, here and further downstream. Therefore, if we are running sgid or 265 * suid, this function's setting of LD_LIBRARY_PATH will be ineffective and 266 * we should case a return from the calling function. Getting the right 267 * libraries will be handled by the RPATH. In reality, this check is 268 * redundant, as the previous check for a non-null LD_LIBRARY_PATH will 269 * return back to the calling function forthwith, it is left here to safe 270 * guard against any changes, in the glibc's existing security policy. 271 */ 272 if ((getgid() != getegid()) || (getuid() != geteuid())) { 273 return JNI_FALSE; 274 } 275 #endif /* __linux */ 276 277 /* 278 * Prevent recursions. Since LD_LIBRARY_PATH is the one which will be set by 279 * previous versions of the JRE, thus it is the only path that matters here. 280 * So we check to see if the desired JRE is set. 281 */ 282 JLI_StrNCpy(jpath, jvmpath, PATH_MAX); 283 p = JLI_StrRChr(jpath, '/'); 284 *p = '\0'; 285 if (llp != NULL && JLI_StrNCmp(llp, jpath, JLI_StrLen(jpath)) == 0) { 286 return JNI_FALSE; 287 } 288 289 /* scrutinize all the paths further */ 290 if (llp != NULL && ContainsLibJVM(llp)) { 291 return JNI_TRUE; 292 } 293 if (dmllp != NULL && ContainsLibJVM(dmllp)) { 294 return JNI_TRUE; 295 } 296 return JNI_FALSE; 297 } 298 #endif /* SETENV_REQUIRED */ 299 300 void 301 CreateExecutionEnvironment(int *pargc, char ***pargv, 302 char jrepath[], jint so_jrepath, 303 char jvmpath[], jint so_jvmpath, 304 char jvmcfg[], jint so_jvmcfg) { 305 /* 306 * First, determine if we are running the desired data model. If we 307 * are running the desired data model, all the error messages 308 * associated with calling GetJREPath, ReadKnownVMs, etc. should be 309 * output, otherwise we simply exit with an error, as we no longer 310 * support dual data models. 311 */ 312 jboolean jvmpathExists; 313 314 /* Compute/set the name of the executable */ 315 SetExecname(*pargv); 316 317 /* Check data model flags, and exec process, if needed */ 318 { 319 char * jvmtype = NULL; 320 int argc = *pargc; 321 char **argv = *pargv; 322 int running = CURRENT_DATA_MODEL; 323 /* 324 * As of jdk9, there is no support for dual mode operations, however 325 * for legacy error reporting purposes and until -d options are supported 326 * we need this. 327 */ 328 int wanted = running; 329 #ifdef SETENV_REQUIRED 330 jboolean mustsetenv = JNI_FALSE; 331 char *runpath = NULL; /* existing effective LD_LIBRARY_PATH setting */ 332 char* new_runpath = NULL; /* desired new LD_LIBRARY_PATH string */ 333 char* newpath = NULL; /* path on new LD_LIBRARY_PATH */ 334 char* lastslash = NULL; 335 char** newenvp = NULL; /* current environment */ 336 size_t new_runpath_size; 337 #ifdef __solaris__ 338 char* dmpath = NULL; /* data model specific LD_LIBRARY_PATH, 339 Solaris only */ 340 #endif /* __solaris__ */ 341 #endif /* SETENV_REQUIRED */ 342 343 char** newargv = NULL; 344 int newargc = 0; 345 346 /* 347 * Starting in 1.5, all unix platforms accept the -d32 and -d64 348 * options. On platforms where only one data-model is supported 349 * (e.g. ia-64 Linux), using the flag for the other data model is 350 * an error and will terminate the program. 351 */ 352 353 { /* open new scope to declare local variables */ 354 int i; 355 356 newargv = (char **)JLI_MemAlloc((argc+1) * sizeof(char*)); 357 newargv[newargc++] = argv[0]; 358 359 /* scan for data model arguments and remove from argument list; 360 last occurrence determines desired data model */ 361 for (i=1; i < argc; i++) { 362 363 if (JLI_StrCmp(argv[i], "-J-d64") == 0 || JLI_StrCmp(argv[i], "-d64") == 0) { 364 wanted = 64; 365 continue; 366 } 367 if (JLI_StrCmp(argv[i], "-J-d32") == 0 || JLI_StrCmp(argv[i], "-d32") == 0) { 368 wanted = 32; 369 continue; 370 } 371 newargv[newargc++] = argv[i]; 372 373 if (IsJavaArgs()) { 374 if (argv[i][0] != '-') continue; 375 } else { 376 if (JLI_StrCmp(argv[i], "-classpath") == 0 || JLI_StrCmp(argv[i], "-cp") == 0) { 377 i++; 378 if (i >= argc) break; 379 newargv[newargc++] = argv[i]; 380 continue; 381 } 382 if (argv[i][0] != '-') { i++; break; } 383 } 384 } 385 386 /* copy rest of args [i .. argc) */ 387 while (i < argc) { 388 newargv[newargc++] = argv[i++]; 389 } 390 newargv[newargc] = NULL; 391 392 /* 393 * newargv has all proper arguments here 394 */ 395 396 argc = newargc; 397 argv = newargv; 398 } 399 400 /* If the data model is not changing, it is an error if the 401 jvmpath does not exist */ 402 if (wanted == running) { 403 /* Find out where the JRE is that we will be using. */ 404 if (!GetJREPath(jrepath, so_jrepath, JNI_FALSE) ) { 405 JLI_ReportErrorMessage(JRE_ERROR1); 406 exit(2); 407 } 408 JLI_Snprintf(jvmcfg, so_jvmcfg, "%s%slib%s%sjvm.cfg", 409 jrepath, FILESEP, FILESEP, FILESEP); 410 /* Find the specified JVM type */ 411 if (ReadKnownVMs(jvmcfg, JNI_FALSE) < 1) { 412 JLI_ReportErrorMessage(CFG_ERROR7); 413 exit(1); 414 } 415 416 jvmpath[0] = '\0'; 417 jvmtype = CheckJvmType(pargc, pargv, JNI_FALSE); 418 if (JLI_StrCmp(jvmtype, "ERROR") == 0) { 419 JLI_ReportErrorMessage(CFG_ERROR9); 420 exit(4); 421 } 422 423 if (!GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath, 0 )) { 424 JLI_ReportErrorMessage(CFG_ERROR8, jvmtype, jvmpath); 425 exit(4); 426 } 427 /* 428 * we seem to have everything we need, so without further ado 429 * we return back, otherwise proceed to set the environment. 430 */ 431 #ifdef SETENV_REQUIRED 432 mustsetenv = RequiresSetenv(jvmpath); 433 JLI_TraceLauncher("mustsetenv: %s\n", mustsetenv ? "TRUE" : "FALSE"); 434 435 if (mustsetenv == JNI_FALSE) { 436 JLI_MemFree(newargv); 437 return; 438 } 439 #else 440 JLI_MemFree(newargv); 441 return; 442 #endif /* SETENV_REQUIRED */ 443 } else { /* do the same speculatively or exit */ 444 JLI_ReportErrorMessage(JRE_ERROR2, wanted); 445 exit(1); 446 } 447 #ifdef SETENV_REQUIRED 448 if (mustsetenv) { 449 /* 450 * We will set the LD_LIBRARY_PATH as follows: 451 * 452 * o $JVMPATH (directory portion only) 453 * o $JRE/lib 454 * o $JRE/../lib 455 * 456 * followed by the user's previous effective LD_LIBRARY_PATH, if 457 * any. 458 */ 459 460 #ifdef __solaris__ 461 /* 462 * Starting in Solaris 7, ld.so.1 supports three LD_LIBRARY_PATH 463 * variables: 464 * 465 * 1. LD_LIBRARY_PATH -- used for 32 and 64 bit searches if 466 * data-model specific variables are not set. 467 * 468 * 2. LD_LIBRARY_PATH_64 -- overrides and replaces LD_LIBRARY_PATH 469 * for 64-bit binaries. 470 * The vm uses LD_LIBRARY_PATH to set the java.library.path system 471 * property. To shield the vm from the complication of multiple 472 * LD_LIBRARY_PATH variables, if the appropriate data model 473 * specific variable is set, we will act as if LD_LIBRARY_PATH had 474 * the value of the data model specific variant and the data model 475 * specific variant will be unset. Note that the variable for the 476 * *wanted* data model must be used (if it is set), not simply the 477 * current running data model. 478 */ 479 480 switch (wanted) { 481 case 0: 482 case 64: 483 dmpath = getenv("LD_LIBRARY_PATH_64"); 484 wanted = 64; 485 break; 486 487 default: 488 JLI_ReportErrorMessage(JRE_ERROR3, __LINE__); 489 exit(1); /* unknown value in wanted */ 490 break; 491 } 492 493 /* 494 * If dmpath is NULL, the relevant data model specific variable is 495 * not set and normal LD_LIBRARY_PATH should be used. 496 */ 497 if (dmpath == NULL) { 498 runpath = getenv("LD_LIBRARY_PATH"); 499 } else { 500 runpath = dmpath; 501 } 502 #else /* ! __solaris__ */ 503 /* 504 * If not on Solaris, assume only a single LD_LIBRARY_PATH 505 * variable. 506 */ 507 runpath = getenv(LD_LIBRARY_PATH); 508 #endif /* __solaris__ */ 509 510 /* runpath contains current effective LD_LIBRARY_PATH setting */ 511 { /* New scope to declare local variable */ 512 char *new_jvmpath = JLI_StringDup(jvmpath); 513 new_runpath_size = ((runpath != NULL) ? JLI_StrLen(runpath) : 0) + 514 2 * JLI_StrLen(jrepath) + 515 #ifdef AIX 516 /* On AIX we additionally need 'jli' in the path because ld doesn't support $ORIGIN. */ 517 JLI_StrLen(jrepath) + JLI_StrLen("/lib//jli:") + 518 #endif 519 JLI_StrLen(new_jvmpath) + 52; 520 new_runpath = JLI_MemAlloc(new_runpath_size); 521 newpath = new_runpath + JLI_StrLen(LD_LIBRARY_PATH "="); 522 523 524 /* 525 * Create desired LD_LIBRARY_PATH value for target data model. 526 */ 527 { 528 /* remove the name of the .so from the JVM path */ 529 lastslash = JLI_StrRChr(new_jvmpath, '/'); 530 if (lastslash) 531 *lastslash = '\0'; 532 533 sprintf(new_runpath, LD_LIBRARY_PATH "=" 534 "%s:" 535 "%s/lib:" 536 #ifdef AIX 537 "%s/lib/jli:" /* Needed on AIX because ld doesn't support $ORIGIN. */ 538 #endif 539 "%s/../lib", 540 new_jvmpath, 541 jrepath, 542 #ifdef AIX 543 jrepath, 544 #endif 545 jrepath 546 ); 547 548 JLI_MemFree(new_jvmpath); 549 550 /* 551 * Check to make sure that the prefix of the current path is the 552 * desired environment variable setting, though the RequiresSetenv 553 * checks if the desired runpath exists, this logic does a more 554 * comprehensive check. 555 */ 556 if (runpath != NULL && 557 JLI_StrNCmp(newpath, runpath, JLI_StrLen(newpath)) == 0 && 558 (runpath[JLI_StrLen(newpath)] == 0 || runpath[JLI_StrLen(newpath)] == ':') && 559 (running == wanted) /* data model does not have to be changed */ 560 #ifdef __solaris__ 561 && (dmpath == NULL) /* data model specific variables not set */ 562 #endif /* __solaris__ */ 563 ) { 564 JLI_MemFree(newargv); 565 JLI_MemFree(new_runpath); 566 return; 567 } 568 } 569 } 570 571 /* 572 * Place the desired environment setting onto the prefix of 573 * LD_LIBRARY_PATH. Note that this prevents any possible infinite 574 * loop of execv() because we test for the prefix, above. 575 */ 576 if (runpath != 0) { 577 /* ensure storage for runpath + colon + NULL */ 578 if ((JLI_StrLen(runpath) + 1 + 1) > new_runpath_size) { 579 JLI_ReportErrorMessageSys(JRE_ERROR11); 580 exit(1); 581 } 582 JLI_StrCat(new_runpath, ":"); 583 JLI_StrCat(new_runpath, runpath); 584 } 585 586 if (putenv(new_runpath) != 0) { 587 exit(1); /* problem allocating memory; LD_LIBRARY_PATH not set 588 properly */ 589 } 590 591 /* 592 * Unix systems document that they look at LD_LIBRARY_PATH only 593 * once at startup, so we have to re-exec the current executable 594 * to get the changed environment variable to have an effect. 595 */ 596 597 #ifdef __solaris__ 598 /* 599 * If dmpath is not NULL, remove the data model specific string 600 * in the environment for the exec'ed child. 601 */ 602 if (dmpath != NULL) 603 (void)UnsetEnv("LD_LIBRARY_PATH_64"); 604 #endif /* __solaris */ 605 606 newenvp = environ; 607 } 608 #endif /* SETENV_REQUIRED */ 609 { 610 char *newexec = execname; 611 JLI_TraceLauncher("TRACER_MARKER:About to EXEC\n"); 612 (void) fflush(stdout); 613 (void) fflush(stderr); 614 #ifdef SETENV_REQUIRED 615 if (mustsetenv) { 616 execve(newexec, argv, newenvp); 617 } else { 618 execv(newexec, argv); 619 } 620 #else /* !SETENV_REQUIRED */ 621 execv(newexec, argv); 622 #endif /* SETENV_REQUIRED */ 623 JLI_ReportErrorMessageSys(JRE_ERROR4, newexec); 624 } 625 exit(1); 626 } 627 } 628 629 /* 630 * On Solaris VM choosing is done by the launcher (java.c), 631 * bitsWanted is used by MacOSX, on Solaris and Linux this. 632 * parameter is unused. 633 */ 634 static jboolean 635 GetJVMPath(const char *jrepath, const char *jvmtype, 636 char *jvmpath, jint jvmpathsize, int bitsWanted) 637 { 638 struct stat s; 639 640 if (JLI_StrChr(jvmtype, '/')) { 641 JLI_Snprintf(jvmpath, jvmpathsize, "%s/" JVM_DLL, jvmtype); 642 } else { 643 JLI_Snprintf(jvmpath, jvmpathsize, "%s/lib/%s/" JVM_DLL, jrepath, jvmtype); 644 } 645 646 JLI_TraceLauncher("Does `%s' exist ... ", jvmpath); 647 648 if (stat(jvmpath, &s) == 0) { 649 JLI_TraceLauncher("yes.\n"); 650 return JNI_TRUE; 651 } else { 652 JLI_TraceLauncher("no.\n"); 653 return JNI_FALSE; 654 } 655 } 656 657 /* 658 * Find path to JRE based on .exe's location or registry settings. 659 */ 660 static jboolean 661 GetJREPath(char *path, jint pathsize, jboolean speculative) 662 { 663 char libjava[MAXPATHLEN]; 664 struct stat s; 665 666 if (GetApplicationHome(path, pathsize)) { 667 /* Is JRE co-located with the application? */ 668 JLI_Snprintf(libjava, sizeof(libjava), "%s/lib/" JAVA_DLL, path); 669 if (access(libjava, F_OK) == 0) { 670 JLI_TraceLauncher("JRE path is %s\n", path); 671 return JNI_TRUE; 672 } 673 /* ensure storage for path + /jre + NULL */ 674 if ((JLI_StrLen(path) + 4 + 1) > (size_t) pathsize) { 675 JLI_TraceLauncher("Insufficient space to store JRE path\n"); 676 return JNI_FALSE; 677 } 678 /* Does the app ship a private JRE in <apphome>/jre directory? */ 679 JLI_Snprintf(libjava, sizeof(libjava), "%s/jre/lib/" JAVA_DLL, path); 680 if (access(libjava, F_OK) == 0) { 681 JLI_StrCat(path, "/jre"); 682 JLI_TraceLauncher("JRE path is %s\n", path); 683 return JNI_TRUE; 684 } 685 } 686 687 if (GetApplicationHomeFromDll(path, pathsize)) { 688 JLI_Snprintf(libjava, sizeof(libjava), "%s/lib/" JAVA_DLL, path); 689 if (stat(libjava, &s) == 0) { 690 JLI_TraceLauncher("JRE path is %s\n", path); 691 return JNI_TRUE; 692 } 693 } 694 695 if (!speculative) 696 JLI_ReportErrorMessage(JRE_ERROR8 JAVA_DLL); 697 return JNI_FALSE; 698 } 699 700 jboolean 701 LoadJavaVM(const char *jvmpath, InvocationFunctions *ifn) 702 { 703 void *libjvm; 704 705 JLI_TraceLauncher("JVM path is %s\n", jvmpath); 706 707 libjvm = dlopen(jvmpath, RTLD_NOW + RTLD_GLOBAL); 708 if (libjvm == NULL) { 709 #if defined(__solaris__) && defined(__sparc) && !defined(_LP64) /* i.e. 32-bit sparc */ 710 FILE * fp; 711 Elf32_Ehdr elf_head; 712 int count; 713 int location; 714 715 fp = fopen(jvmpath, "r"); 716 if (fp == NULL) { 717 JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror()); 718 return JNI_FALSE; 719 } 720 721 /* read in elf header */ 722 count = fread((void*)(&elf_head), sizeof(Elf32_Ehdr), 1, fp); 723 fclose(fp); 724 if (count < 1) { 725 JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror()); 726 return JNI_FALSE; 727 } 728 729 /* 730 * Check for running a server vm (compiled with -xarch=v8plus) 731 * on a stock v8 processor. In this case, the machine type in 732 * the elf header would not be included the architecture list 733 * provided by the isalist command, which is turn is gotten from 734 * sysinfo. This case cannot occur on 64-bit hardware and thus 735 * does not have to be checked for in binaries with an LP64 data 736 * model. 737 */ 738 if (elf_head.e_machine == EM_SPARC32PLUS) { 739 char buf[257]; /* recommended buffer size from sysinfo man 740 page */ 741 long length; 742 char* location; 743 744 length = sysinfo(SI_ISALIST, buf, 257); 745 if (length > 0) { 746 location = JLI_StrStr(buf, "sparcv8plus "); 747 if (location == NULL) { 748 JLI_ReportErrorMessage(JVM_ERROR3); 749 return JNI_FALSE; 750 } 751 } 752 } 753 #endif 754 JLI_ReportErrorMessage(DLL_ERROR1, __LINE__); 755 JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror()); 756 return JNI_FALSE; 757 } 758 759 ifn->CreateJavaVM = (CreateJavaVM_t) 760 dlsym(libjvm, "JNI_CreateJavaVM"); 761 if (ifn->CreateJavaVM == NULL) { 762 JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror()); 763 return JNI_FALSE; 764 } 765 766 ifn->GetDefaultJavaVMInitArgs = (GetDefaultJavaVMInitArgs_t) 767 dlsym(libjvm, "JNI_GetDefaultJavaVMInitArgs"); 768 if (ifn->GetDefaultJavaVMInitArgs == NULL) { 769 JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror()); 770 return JNI_FALSE; 771 } 772 773 ifn->GetCreatedJavaVMs = (GetCreatedJavaVMs_t) 774 dlsym(libjvm, "JNI_GetCreatedJavaVMs"); 775 if (ifn->GetCreatedJavaVMs == NULL) { 776 JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror()); 777 return JNI_FALSE; 778 } 779 780 return JNI_TRUE; 781 } 782 783 /* 784 * Compute the name of the executable 785 * 786 * In order to re-exec securely we need the absolute path of the 787 * executable. On Solaris getexecname(3c) may not return an absolute 788 * path so we use dladdr to get the filename of the executable and 789 * then use realpath to derive an absolute path. From Solaris 9 790 * onwards the filename returned in DL_info structure from dladdr is 791 * an absolute pathname so technically realpath isn't required. 792 * On Linux we read the executable name from /proc/self/exe. 793 * As a fallback, and for platforms other than Solaris and Linux, 794 * we use FindExecName to compute the executable name. 795 */ 796 const char* 797 SetExecname(char **argv) 798 { 799 char* exec_path = NULL; 800 #if defined(__solaris__) 801 { 802 Dl_info dlinfo; 803 int (*fptr)(); 804 805 fptr = (int (*)())dlsym(RTLD_DEFAULT, "main"); 806 if (fptr == NULL) { 807 JLI_ReportErrorMessage(DLL_ERROR3, dlerror()); 808 return JNI_FALSE; 809 } 810 811 if (dladdr((void*)fptr, &dlinfo)) { 812 char *resolved = (char*)JLI_MemAlloc(PATH_MAX+1); 813 if (resolved != NULL) { 814 exec_path = realpath(dlinfo.dli_fname, resolved); 815 if (exec_path == NULL) { 816 JLI_MemFree(resolved); 817 } 818 } 819 } 820 } 821 #elif defined(__linux__) 822 { 823 const char* self = "/proc/self/exe"; 824 char buf[PATH_MAX+1]; 825 int len = readlink(self, buf, PATH_MAX); 826 if (len >= 0) { 827 buf[len] = '\0'; /* readlink(2) doesn't NUL terminate */ 828 exec_path = JLI_StringDup(buf); 829 } 830 } 831 #else /* !__solaris__ && !__linux__ */ 832 { 833 /* Not implemented */ 834 } 835 #endif 836 837 if (exec_path == NULL) { 838 exec_path = FindExecName(argv[0]); 839 } 840 execname = exec_path; 841 return exec_path; 842 } 843 844 /* --- Splash Screen shared library support --- */ 845 static const char* SPLASHSCREEN_SO = JNI_LIB_NAME("splashscreen"); 846 static void* hSplashLib = NULL; 847 848 void* SplashProcAddress(const char* name) { 849 if (!hSplashLib) { 850 int ret; 851 char jrePath[MAXPATHLEN]; 852 char splashPath[MAXPATHLEN]; 853 854 if (!GetJREPath(jrePath, sizeof(jrePath), JNI_FALSE)) { 855 JLI_ReportErrorMessage(JRE_ERROR1); 856 return NULL; 857 } 858 ret = JLI_Snprintf(splashPath, sizeof(splashPath), "%s/lib/%s", 859 jrePath, SPLASHSCREEN_SO); 860 861 if (ret >= (int) sizeof(splashPath)) { 862 JLI_ReportErrorMessage(JRE_ERROR11); 863 return NULL; 864 } 865 if (ret < 0) { 866 JLI_ReportErrorMessage(JRE_ERROR13); 867 return NULL; 868 } 869 hSplashLib = dlopen(splashPath, RTLD_LAZY | RTLD_GLOBAL); 870 JLI_TraceLauncher("Info: loaded %s\n", splashPath); 871 } 872 if (hSplashLib) { 873 void* sym = dlsym(hSplashLib, name); 874 return sym; 875 } else { 876 return NULL; 877 } 878 } 879 880 void SplashFreeLibrary() { 881 if (hSplashLib) { 882 dlclose(hSplashLib); 883 hSplashLib = NULL; 884 } 885 } 886 887 /* 888 * Block current thread and continue execution in a new thread 889 */ 890 int 891 ContinueInNewThread0(int (JNICALL *continuation)(void *), jlong stack_size, void * args) { 892 int rslt; 893 #ifndef __solaris__ 894 pthread_t tid; 895 pthread_attr_t attr; 896 pthread_attr_init(&attr); 897 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE); 898 899 if (stack_size > 0) { 900 pthread_attr_setstacksize(&attr, stack_size); 901 pthread_attr_setguardsize(&attr, 0); // no pthread guard page on java threads 902 } 903 904 if (pthread_create(&tid, &attr, (void *(*)(void*))continuation, (void*)args) == 0) { 905 void * tmp; 906 pthread_join(tid, &tmp); 907 rslt = (int)(intptr_t)tmp; 908 } else { 909 /* 910 * Continue execution in current thread if for some reason (e.g. out of 911 * memory/LWP) a new thread can't be created. This will likely fail 912 * later in continuation as JNI_CreateJavaVM needs to create quite a 913 * few new threads, anyway, just give it a try.. 914 */ 915 rslt = continuation(args); 916 } 917 918 pthread_attr_destroy(&attr); 919 #else /* __solaris__ */ 920 thread_t tid; 921 long flags = 0; 922 if (thr_create(NULL, stack_size, (void *(*)(void *))continuation, args, flags, &tid) == 0) { 923 void * tmp; 924 thr_join(tid, NULL, &tmp); 925 rslt = (int)(intptr_t)tmp; 926 } else { 927 /* See above. Continue in current thread if thr_create() failed */ 928 rslt = continuation(args); 929 } 930 #endif /* !__solaris__ */ 931 return rslt; 932 } 933 934 /* Coarse estimation of number of digits assuming the worst case is a 64-bit pid. */ 935 #define MAX_PID_STR_SZ 20 936 937 void SetJavaLauncherPlatformProps() { 938 /* Linux only */ 939 #ifdef __linux__ 940 const char *substr = "-Dsun.java.launcher.pid="; 941 char *pid_prop_str = (char *)JLI_MemAlloc(JLI_StrLen(substr) + MAX_PID_STR_SZ + 1); 942 sprintf(pid_prop_str, "%s%d", substr, getpid()); 943 AddOption(pid_prop_str, NULL); 944 #endif /* __linux__ */ 945 } 946 947 int 948 JVMInit(InvocationFunctions* ifn, jlong threadStackSize, 949 int argc, char **argv, 950 int mode, char *what, int ret) 951 { 952 ShowSplashScreen(); 953 return ContinueInNewThread(ifn, threadStackSize, argc, argv, mode, what, ret); 954 } 955 956 void 957 PostJVMInit(JNIEnv *env, jclass mainClass, JavaVM *vm) 958 { 959 // stubbed out for windows and *nixes. 960 } 961 962 void 963 RegisterThread() 964 { 965 // stubbed out for windows and *nixes. 966 } 967 968 /* 969 * on unix, we return a false to indicate this option is not applicable 970 */ 971 jboolean 972 ProcessPlatformOption(const char *arg) 973 { 974 return JNI_FALSE; 975 }