1 /* 2 * Copyright (c) 2012, 2015, 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 <sys/time.h> 39 40 #include "manifest_info.h" 41 42 /* Support Cocoa event loop on the main thread */ 43 #include <Cocoa/Cocoa.h> 44 #include <objc/objc-runtime.h> 45 #include <objc/objc-auto.h> 46 47 #include <errno.h> 48 #include <spawn.h> 49 50 struct NSAppArgs { 51 int argc; 52 char **argv; 53 }; 54 55 #define JVM_DLL "libjvm.dylib" 56 #define JAVA_DLL "libjava.dylib" 57 /* FALLBACK avoids naming conflicts with system libraries 58 * (eg, ImageIO's libJPEG.dylib) */ 59 #define LD_LIBRARY_PATH "DYLD_FALLBACK_LIBRARY_PATH" 60 61 /* 62 * If a processor / os combination has the ability to run binaries of 63 * two data models and cohabitation of jre/jdk bits with both data 64 * models is supported, then DUAL_MODE is defined. MacOSX is a hybrid 65 * system in that, the universal library can contain all types of libraries 66 * 32/64 and client/server, thus the spawn is capable of linking with the 67 * appropriate library as requested. 68 * 69 * Notes: 70 * 1. VM. DUAL_MODE is disabled, and not supported, however, it is left here in 71 * for experimentation and perhaps enable it in the future. 72 * 2. At the time of this writing, the universal library contains only 73 * a server 64-bit server JVM. 74 * 3. "-client" command line option is supported merely as a command line flag, 75 * for, compatibility reasons, however, a server VM will be launched. 76 */ 77 78 /* 79 * Flowchart of launcher execs and options processing on unix 80 * 81 * The selection of the proper vm shared library to open depends on 82 * several classes of command line options, including vm "flavor" 83 * options (-client, -server) and the data model options, -d32 and 84 * -d64, as well as a version specification which may have come from 85 * the command line or from the manifest of an executable jar file. 86 * The vm selection options are not passed to the running 87 * virtual machine; they must be screened out by the launcher. 88 * 89 * The version specification (if any) is processed first by the 90 * platform independent routine SelectVersion. This may result in 91 * the exec of the specified launcher version. 92 * 93 * Now, in most cases,the launcher will dlopen the target libjvm.so. All 94 * required libraries are loaded by the runtime linker, using the known paths 95 * baked into the shared libraries at compile time. Therefore, 96 * in most cases, the launcher will only exec, if the data models are 97 * mismatched, and will not set any environment variables, regardless of the 98 * data models. 99 * 100 * 101 * 102 * Main 103 * (incoming argv) 104 * | 105 * \|/ 106 * CreateExecutionEnvironment 107 * (determines desired data model) 108 * | 109 * | 110 * \|/ 111 * Have Desired Model ? --> NO --> Is Dual-Mode ? --> NO --> Exit(with error) 112 * | | 113 * | | 114 * | \|/ 115 * | YES 116 * | | 117 * | | 118 * | \|/ 119 * | CheckJvmType 120 * | (removes -client, -server etc.) 121 * | | 122 * | | 123 * \|/ \|/ 124 * YES Find the desired executable/library 125 * | | 126 * | | 127 * \|/ \|/ 128 * CheckJvmType POINT A 129 * (removes -client, -server, etc.) 130 * | 131 * | 132 * \|/ 133 * TranslateDashJArgs... 134 * (Prepare to pass args to vm) 135 * | 136 * | 137 * \|/ 138 * ParseArguments 139 * (removes -d32 and -d64 if any, 140 * processes version options, 141 * creates argument list for vm, 142 * etc.) 143 * | 144 * | 145 * \|/ 146 * POINT A 147 * | 148 * | 149 * \|/ 150 * Path is desired JRE ? YES --> Have Desired Model ? NO --> Re-exec --> Main 151 * NO YES --> Continue 152 * | 153 * | 154 * \|/ 155 * Paths have well known 156 * jvm paths ? --> NO --> Have Desired Model ? NO --> Re-exec --> Main 157 * YES YES --> Continue 158 * | 159 * | 160 * \|/ 161 * Does libjvm.so exist 162 * in any of them ? --> NO --> Have Desired Model ? NO --> Re-exec --> Main 163 * YES YES --> Continue 164 * | 165 * | 166 * \|/ 167 * Re-exec / Spawn 168 * | 169 * | 170 * \|/ 171 * Main 172 */ 173 174 #define GetArch() GetArchPath(CURRENT_DATA_MODEL) 175 176 /* Store the name of the executable once computed */ 177 static char *execname = NULL; 178 179 /* 180 * execname accessor from other parts of platform dependent logic 181 */ 182 const char * 183 GetExecName() { 184 return execname; 185 } 186 187 const char * 188 GetArchPath(int nbits) 189 { 190 switch(nbits) { 191 default: 192 return LIBARCHNAME; 193 } 194 } 195 196 197 /* 198 * Exports the JNI interface from libjli 199 * 200 * This allows client code to link against the .jre/.jdk bundles, 201 * and not worry about trying to pick a HotSpot to link against. 202 * 203 * Switching architectures is unsupported, since client code has 204 * made that choice before the JVM was requested. 205 */ 206 207 static InvocationFunctions *sExportedJNIFunctions = NULL; 208 static char *sPreferredJVMType = NULL; 209 210 static InvocationFunctions *GetExportedJNIFunctions() { 211 if (sExportedJNIFunctions != NULL) return sExportedJNIFunctions; 212 213 char jrePath[PATH_MAX]; 214 jboolean gotJREPath = GetJREPath(jrePath, sizeof(jrePath), GetArch(), JNI_FALSE); 215 if (!gotJREPath) { 216 JLI_ReportErrorMessage("Failed to GetJREPath()"); 217 return NULL; 218 } 219 220 char *preferredJVM = sPreferredJVMType; 221 if (preferredJVM == NULL) { 222 #if defined(__i386__) 223 preferredJVM = "client"; 224 #elif defined(__x86_64__) 225 preferredJVM = "server"; 226 #else 227 #error "Unknown architecture - needs definition" 228 #endif 229 } 230 231 char jvmPath[PATH_MAX]; 232 jboolean gotJVMPath = GetJVMPath(jrePath, preferredJVM, jvmPath, sizeof(jvmPath), GetArch(), CURRENT_DATA_MODEL); 233 if (!gotJVMPath) { 234 JLI_ReportErrorMessage("Failed to GetJVMPath()"); 235 return NULL; 236 } 237 238 InvocationFunctions *fxns = malloc(sizeof(InvocationFunctions)); 239 jboolean vmLoaded = LoadJavaVM(jvmPath, fxns); 240 if (!vmLoaded) { 241 JLI_ReportErrorMessage("Failed to LoadJavaVM()"); 242 return NULL; 243 } 244 245 return sExportedJNIFunctions = fxns; 246 } 247 248 JNIEXPORT jint JNICALL 249 JNI_GetDefaultJavaVMInitArgs(void *args) { 250 InvocationFunctions *ifn = GetExportedJNIFunctions(); 251 if (ifn == NULL) return JNI_ERR; 252 return ifn->GetDefaultJavaVMInitArgs(args); 253 } 254 255 JNIEXPORT jint JNICALL 256 JNI_CreateJavaVM(JavaVM **pvm, void **penv, void *args) { 257 InvocationFunctions *ifn = GetExportedJNIFunctions(); 258 if (ifn == NULL) return JNI_ERR; 259 return ifn->CreateJavaVM(pvm, penv, args); 260 } 261 262 JNIEXPORT jint JNICALL 263 JNI_GetCreatedJavaVMs(JavaVM **vmBuf, jsize bufLen, jsize *nVMs) { 264 InvocationFunctions *ifn = GetExportedJNIFunctions(); 265 if (ifn == NULL) return JNI_ERR; 266 return ifn->GetCreatedJavaVMs(vmBuf, bufLen, nVMs); 267 } 268 269 /* 270 * Allow JLI-aware launchers to specify a client/server preference 271 */ 272 JNIEXPORT void JNICALL 273 JLI_SetPreferredJVM(const char *prefJVM) { 274 if (sPreferredJVMType != NULL) { 275 free(sPreferredJVMType); 276 sPreferredJVMType = NULL; 277 } 278 279 if (prefJVM == NULL) return; 280 sPreferredJVMType = strdup(prefJVM); 281 } 282 283 static BOOL awtLoaded = NO; 284 static pthread_mutex_t awtLoaded_mutex = PTHREAD_MUTEX_INITIALIZER; 285 static pthread_cond_t awtLoaded_cv = PTHREAD_COND_INITIALIZER; 286 287 JNIEXPORT void JNICALL 288 JLI_NotifyAWTLoaded() 289 { 290 pthread_mutex_lock(&awtLoaded_mutex); 291 awtLoaded = YES; 292 pthread_cond_signal(&awtLoaded_cv); 293 pthread_mutex_unlock(&awtLoaded_mutex); 294 } 295 296 static int (*main_fptr)(int argc, char **argv) = NULL; 297 298 /* 299 * Unwrap the arguments and re-run main() 300 */ 301 static void *apple_main (void *arg) 302 { 303 objc_registerThreadWithCollector(); 304 305 if (main_fptr == NULL) { 306 main_fptr = (int (*)())dlsym(RTLD_DEFAULT, "main"); 307 if (main_fptr == NULL) { 308 JLI_ReportErrorMessageSys("error locating main entrypoint\n"); 309 exit(1); 310 } 311 } 312 313 struct NSAppArgs *args = (struct NSAppArgs *) arg; 314 exit(main_fptr(args->argc, args->argv)); 315 } 316 317 static void dummyTimer(CFRunLoopTimerRef timer, void *info) {} 318 319 static void ParkEventLoop() { 320 // RunLoop needs at least one source, and 1e20 is pretty far into the future 321 CFRunLoopTimerRef t = CFRunLoopTimerCreate(kCFAllocatorDefault, 1.0e20, 0.0, 0, 0, dummyTimer, NULL); 322 CFRunLoopAddTimer(CFRunLoopGetCurrent(), t, kCFRunLoopDefaultMode); 323 CFRelease(t); 324 325 // Park this thread in the main run loop. 326 int32_t result; 327 do { 328 result = CFRunLoopRunInMode(kCFRunLoopDefaultMode, 1.0e20, false); 329 } while (result != kCFRunLoopRunFinished); 330 } 331 332 /* 333 * Mac OS X mandates that the GUI event loop run on very first thread of 334 * an application. This requires that we re-call Java's main() on a new 335 * thread, reserving the 'main' thread for Cocoa. 336 */ 337 static void MacOSXStartup(int argc, char *argv[]) { 338 // Thread already started? 339 static jboolean started = false; 340 if (started) { 341 return; 342 } 343 started = true; 344 345 // Hand off arguments 346 struct NSAppArgs args; 347 args.argc = argc; 348 args.argv = argv; 349 350 // Fire up the main thread 351 pthread_t main_thr; 352 if (pthread_create(&main_thr, NULL, &apple_main, &args) != 0) { 353 JLI_ReportErrorMessageSys("Could not create main thread: %s\n", strerror(errno)); 354 exit(1); 355 } 356 if (pthread_detach(main_thr)) { 357 JLI_ReportErrorMessageSys("pthread_detach() failed: %s\n", strerror(errno)); 358 exit(1); 359 } 360 361 ParkEventLoop(); 362 } 363 364 void 365 CreateExecutionEnvironment(int *pargc, char ***pargv, 366 char jrepath[], jint so_jrepath, 367 char jvmpath[], jint so_jvmpath, 368 char jvmcfg[], jint so_jvmcfg) { 369 /* 370 * First, determine if we are running the desired data model. If we 371 * are running the desired data model, all the error messages 372 * associated with calling GetJREPath, ReadKnownVMs, etc. should be 373 * output. However, if we are not running the desired data model, 374 * some of the errors should be suppressed since it is more 375 * informative to issue an error message based on whether or not the 376 * os/processor combination has dual mode capabilities. 377 */ 378 jboolean jvmpathExists; 379 380 /* Compute/set the name of the executable */ 381 SetExecname(*pargv); 382 383 /* Check data model flags, and exec process, if needed */ 384 { 385 char *arch = (char *)GetArch(); /* like sparc or sparcv9 */ 386 char * jvmtype = NULL; 387 int argc = *pargc; 388 char **argv = *pargv; 389 int running = CURRENT_DATA_MODEL; 390 391 int wanted = running; /* What data mode is being 392 asked for? Current model is 393 fine unless another model 394 is asked for */ 395 396 char** newargv = NULL; 397 int newargc = 0; 398 399 /* 400 * Starting in 1.5, all unix platforms accept the -d32 and -d64 401 * options. On platforms where only one data-model is supported 402 * (e.g. ia-64 Linux), using the flag for the other data model is 403 * an error and will terminate the program. 404 */ 405 406 { /* open new scope to declare local variables */ 407 int i; 408 409 newargv = (char **)JLI_MemAlloc((argc+1) * sizeof(char*)); 410 newargv[newargc++] = argv[0]; 411 412 /* scan for data model arguments and remove from argument list; 413 last occurrence determines desired data model */ 414 for (i=1; i < argc; i++) { 415 416 if (JLI_StrCmp(argv[i], "-J-d64") == 0 || JLI_StrCmp(argv[i], "-d64") == 0) { 417 wanted = 64; 418 continue; 419 } 420 if (JLI_StrCmp(argv[i], "-J-d32") == 0 || JLI_StrCmp(argv[i], "-d32") == 0) { 421 wanted = 32; 422 continue; 423 } 424 newargv[newargc++] = argv[i]; 425 426 if (IsJavaArgs()) { 427 if (argv[i][0] != '-') continue; 428 } else { 429 if (JLI_StrCmp(argv[i], "-classpath") == 0 || JLI_StrCmp(argv[i], "-cp") == 0) { 430 i++; 431 if (i >= argc) break; 432 newargv[newargc++] = argv[i]; 433 continue; 434 } 435 if (argv[i][0] != '-') { i++; break; } 436 } 437 } 438 439 /* copy rest of args [i .. argc) */ 440 while (i < argc) { 441 newargv[newargc++] = argv[i++]; 442 } 443 newargv[newargc] = NULL; 444 445 /* 446 * newargv has all proper arguments here 447 */ 448 449 argc = newargc; 450 argv = newargv; 451 } 452 453 /* If the data model is not changing, it is an error if the 454 jvmpath does not exist */ 455 if (wanted == running) { 456 /* Find out where the JRE is that we will be using. */ 457 if (!GetJREPath(jrepath, so_jrepath, arch, JNI_FALSE) ) { 458 JLI_ReportErrorMessage(JRE_ERROR1); 459 exit(2); 460 } 461 JLI_Snprintf(jvmcfg, so_jvmcfg, "%s%slib%s%s%sjvm.cfg", 462 jrepath, FILESEP, FILESEP, "", ""); 463 /* Find the specified JVM type */ 464 if (ReadKnownVMs(jvmcfg, JNI_FALSE) < 1) { 465 JLI_ReportErrorMessage(CFG_ERROR7); 466 exit(1); 467 } 468 469 jvmpath[0] = '\0'; 470 jvmtype = CheckJvmType(pargc, pargv, JNI_FALSE); 471 if (JLI_StrCmp(jvmtype, "ERROR") == 0) { 472 JLI_ReportErrorMessage(CFG_ERROR9); 473 exit(4); 474 } 475 476 if (!GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath, arch, wanted)) { 477 JLI_ReportErrorMessage(CFG_ERROR8, jvmtype, jvmpath); 478 exit(4); 479 } 480 481 /* 482 * Mac OS X requires the Cocoa event loop to be run on the "main" 483 * thread. Spawn off a new thread to run main() and pass 484 * this thread off to the Cocoa event loop. 485 */ 486 MacOSXStartup(argc, argv); 487 488 /* 489 * we seem to have everything we need, so without further ado 490 * we return back, otherwise proceed to set the environment. 491 */ 492 return; 493 } else { /* do the same speculatively or exit */ 494 #if defined(DUAL_MODE) 495 if (running != wanted) { 496 /* Find out where the JRE is that we will be using. */ 497 if (!GetJREPath(jrepath, so_jrepath, GetArchPath(wanted), JNI_TRUE)) { 498 /* give up and let other code report error message */ 499 JLI_ReportErrorMessage(JRE_ERROR2, wanted); 500 exit(1); 501 } 502 JLI_Snprintf(jvmcfg, so_jvmcfg, "%s%slib%s%s%sjvm.cfg", 503 jrepath, FILESEP, FILESEP, "", ""); 504 /* 505 * Read in jvm.cfg for target data model and process vm 506 * selection options. 507 */ 508 if (ReadKnownVMs(jvmcfg, JNI_TRUE) < 1) { 509 /* give up and let other code report error message */ 510 JLI_ReportErrorMessage(JRE_ERROR2, wanted); 511 exit(1); 512 } 513 jvmpath[0] = '\0'; 514 jvmtype = CheckJvmType(pargc, pargv, JNI_TRUE); 515 if (JLI_StrCmp(jvmtype, "ERROR") == 0) { 516 JLI_ReportErrorMessage(CFG_ERROR9); 517 exit(4); 518 } 519 520 /* exec child can do error checking on the existence of the path */ 521 jvmpathExists = GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath, GetArchPath(wanted), wanted); 522 } 523 #else /* ! DUAL_MODE */ 524 JLI_ReportErrorMessage(JRE_ERROR2, wanted); 525 exit(1); 526 #endif /* DUAL_MODE */ 527 } 528 { 529 char *newexec = execname; 530 JLI_TraceLauncher("TRACER_MARKER:About to EXEC\n"); 531 (void) fflush(stdout); 532 (void) fflush(stderr); 533 /* 534 * Use posix_spawn() instead of execv() on Mac OS X. 535 * This allows us to choose which architecture the child process 536 * should run as. 537 */ 538 { 539 posix_spawnattr_t attr; 540 size_t unused_size; 541 pid_t unused_pid; 542 543 #if defined(__i386__) || defined(__x86_64__) 544 cpu_type_t cpu_type[] = { (wanted == 64) ? CPU_TYPE_X86_64 : CPU_TYPE_X86, 545 (running== 64) ? CPU_TYPE_X86_64 : CPU_TYPE_X86 }; 546 #else 547 cpu_type_t cpu_type[] = { CPU_TYPE_ANY }; 548 #endif /* __i386 .. */ 549 550 posix_spawnattr_init(&attr); 551 posix_spawnattr_setflags(&attr, POSIX_SPAWN_SETEXEC); 552 posix_spawnattr_setbinpref_np(&attr, sizeof(cpu_type) / sizeof(cpu_type_t), 553 cpu_type, &unused_size); 554 555 posix_spawn(&unused_pid, newexec, NULL, &attr, argv, environ); 556 } 557 JLI_ReportErrorMessageSys(JRE_ERROR4, newexec); 558 559 #if defined(DUAL_MODE) 560 if (running != wanted) { 561 JLI_ReportErrorMessage(JRE_ERROR5, wanted, running); 562 } 563 #endif /* DUAL_MODE */ 564 } 565 exit(1); 566 } 567 } 568 569 /* 570 * VM choosing is done by the launcher (java.c). 571 */ 572 static jboolean 573 GetJVMPath(const char *jrepath, const char *jvmtype, 574 char *jvmpath, jint jvmpathsize, const char * arch, int bitsWanted) 575 { 576 struct stat s; 577 578 if (JLI_StrChr(jvmtype, '/')) { 579 JLI_Snprintf(jvmpath, jvmpathsize, "%s/" JVM_DLL, jvmtype); 580 } else { 581 /* 582 * macosx client library is built thin, i386 only. 583 * 64 bit client requests must load server library 584 */ 585 const char *jvmtypeUsed = ((bitsWanted == 64) && (strcmp(jvmtype, "client") == 0)) ? "server" : jvmtype; 586 JLI_Snprintf(jvmpath, jvmpathsize, "%s/lib/%s/" JVM_DLL, jrepath, jvmtypeUsed); 587 } 588 589 JLI_TraceLauncher("Does `%s' exist ... ", jvmpath); 590 591 if (stat(jvmpath, &s) == 0) { 592 JLI_TraceLauncher("yes.\n"); 593 return JNI_TRUE; 594 } else { 595 JLI_TraceLauncher("no.\n"); 596 return JNI_FALSE; 597 } 598 } 599 600 /* 601 * Find path to JRE based on .exe's location or registry settings. 602 */ 603 static jboolean 604 GetJREPath(char *path, jint pathsize, const char * arch, jboolean speculative) 605 { 606 char libjava[MAXPATHLEN]; 607 608 if (GetApplicationHome(path, pathsize)) { 609 /* Is JRE co-located with the application? */ 610 JLI_Snprintf(libjava, sizeof(libjava), "%s/lib/" JAVA_DLL, path); 611 if (access(libjava, F_OK) == 0) { 612 return JNI_TRUE; 613 } 614 /* ensure storage for path + /jre + NULL */ 615 if ((JLI_StrLen(path) + 4 + 1) > (size_t) pathsize) { 616 JLI_TraceLauncher("Insufficient space to store JRE path\n"); 617 return JNI_FALSE; 618 } 619 /* Does the app ship a private JRE in <apphome>/jre directory? */ 620 JLI_Snprintf(libjava, sizeof(libjava), "%s/jre/lib/" JAVA_DLL, path); 621 if (access(libjava, F_OK) == 0) { 622 JLI_StrCat(path, "/jre"); 623 JLI_TraceLauncher("JRE path is %s\n", path); 624 return JNI_TRUE; 625 } 626 } 627 628 /* try to find ourselves instead */ 629 Dl_info selfInfo; 630 dladdr(&GetJREPath, &selfInfo); 631 632 char *realPathToSelf = realpath(selfInfo.dli_fname, path); 633 if (realPathToSelf != path) { 634 return JNI_FALSE; 635 } 636 637 size_t pathLen = strlen(realPathToSelf); 638 if (pathLen == 0) { 639 return JNI_FALSE; 640 } 641 642 const char lastPathComponent[] = "/lib/jli/libjli.dylib"; 643 size_t sizeOfLastPathComponent = sizeof(lastPathComponent) - 1; 644 if (pathLen < sizeOfLastPathComponent) { 645 return JNI_FALSE; 646 } 647 648 size_t indexOfLastPathComponent = pathLen - sizeOfLastPathComponent; 649 if (0 == strncmp(realPathToSelf + indexOfLastPathComponent, lastPathComponent, sizeOfLastPathComponent - 1)) { 650 realPathToSelf[indexOfLastPathComponent + 1] = '\0'; 651 return JNI_TRUE; 652 } 653 654 if (!speculative) 655 JLI_ReportErrorMessage(JRE_ERROR8 JAVA_DLL); 656 return JNI_FALSE; 657 } 658 659 jboolean 660 LoadJavaVM(const char *jvmpath, InvocationFunctions *ifn) 661 { 662 Dl_info dlinfo; 663 void *libjvm; 664 665 JLI_TraceLauncher("JVM path is %s\n", jvmpath); 666 667 libjvm = dlopen(jvmpath, RTLD_NOW + RTLD_GLOBAL); 668 if (libjvm == NULL) { 669 JLI_ReportErrorMessage(DLL_ERROR1, __LINE__); 670 JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror()); 671 return JNI_FALSE; 672 } 673 674 ifn->CreateJavaVM = (CreateJavaVM_t) 675 dlsym(libjvm, "JNI_CreateJavaVM"); 676 if (ifn->CreateJavaVM == NULL) { 677 JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror()); 678 return JNI_FALSE; 679 } 680 681 ifn->GetDefaultJavaVMInitArgs = (GetDefaultJavaVMInitArgs_t) 682 dlsym(libjvm, "JNI_GetDefaultJavaVMInitArgs"); 683 if (ifn->GetDefaultJavaVMInitArgs == NULL) { 684 JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror()); 685 return JNI_FALSE; 686 } 687 688 ifn->GetCreatedJavaVMs = (GetCreatedJavaVMs_t) 689 dlsym(libjvm, "JNI_GetCreatedJavaVMs"); 690 if (ifn->GetCreatedJavaVMs == NULL) { 691 JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror()); 692 return JNI_FALSE; 693 } 694 695 return JNI_TRUE; 696 } 697 698 /* 699 * Compute the name of the executable 700 * 701 * In order to re-exec securely we need the absolute path of the 702 * executable. On Solaris getexecname(3c) may not return an absolute 703 * path so we use dladdr to get the filename of the executable and 704 * then use realpath to derive an absolute path. From Solaris 9 705 * onwards the filename returned in DL_info structure from dladdr is 706 * an absolute pathname so technically realpath isn't required. 707 * On Linux we read the executable name from /proc/self/exe. 708 * As a fallback, and for platforms other than Solaris and Linux, 709 * we use FindExecName to compute the executable name. 710 */ 711 const char* 712 SetExecname(char **argv) 713 { 714 char* exec_path = NULL; 715 { 716 Dl_info dlinfo; 717 int (*fptr)(); 718 719 fptr = (int (*)())dlsym(RTLD_DEFAULT, "main"); 720 if (fptr == NULL) { 721 JLI_ReportErrorMessage(DLL_ERROR3, dlerror()); 722 return JNI_FALSE; 723 } 724 725 if (dladdr((void*)fptr, &dlinfo)) { 726 char *resolved = (char*)JLI_MemAlloc(PATH_MAX+1); 727 if (resolved != NULL) { 728 exec_path = realpath(dlinfo.dli_fname, resolved); 729 if (exec_path == NULL) { 730 JLI_MemFree(resolved); 731 } 732 } 733 } 734 } 735 if (exec_path == NULL) { 736 exec_path = FindExecName(argv[0]); 737 } 738 execname = exec_path; 739 return exec_path; 740 } 741 742 /* 743 * BSD's implementation of CounterGet() 744 */ 745 int64_t 746 CounterGet() 747 { 748 struct timeval tv; 749 gettimeofday(&tv, NULL); 750 return (tv.tv_sec * 1000) + tv.tv_usec; 751 } 752 753 754 /* --- Splash Screen shared library support --- */ 755 756 static JavaVM* SetJavaVMValue() 757 { 758 JavaVM * jvm = NULL; 759 760 // The handle is good for both the launcher and the libosxapp.dylib 761 void * handle = dlopen(NULL, RTLD_LAZY | RTLD_GLOBAL); 762 if (handle) { 763 typedef JavaVM* (*JLI_GetJavaVMInstance_t)(); 764 765 JLI_GetJavaVMInstance_t JLI_GetJavaVMInstance = 766 (JLI_GetJavaVMInstance_t)dlsym(handle, 767 "JLI_GetJavaVMInstance"); 768 if (JLI_GetJavaVMInstance) { 769 jvm = JLI_GetJavaVMInstance(); 770 } 771 772 if (jvm) { 773 typedef void (*OSXAPP_SetJavaVM_t)(JavaVM*); 774 775 OSXAPP_SetJavaVM_t OSXAPP_SetJavaVM = 776 (OSXAPP_SetJavaVM_t)dlsym(handle, "OSXAPP_SetJavaVM"); 777 if (OSXAPP_SetJavaVM) { 778 OSXAPP_SetJavaVM(jvm); 779 } else { 780 jvm = NULL; 781 } 782 } 783 784 dlclose(handle); 785 } 786 787 return jvm; 788 } 789 790 static const char* SPLASHSCREEN_SO = JNI_LIB_NAME("splashscreen"); 791 792 static void* hSplashLib = NULL; 793 794 void* SplashProcAddress(const char* name) { 795 if (!hSplashLib) { 796 char jrePath[PATH_MAX]; 797 if (!GetJREPath(jrePath, sizeof(jrePath), GetArch(), JNI_FALSE)) { 798 JLI_ReportErrorMessage(JRE_ERROR1); 799 return NULL; 800 } 801 802 char splashPath[PATH_MAX]; 803 const int ret = JLI_Snprintf(splashPath, sizeof(splashPath), 804 "%s/lib/%s", jrePath, SPLASHSCREEN_SO); 805 if (ret >= (int)sizeof(splashPath)) { 806 JLI_ReportErrorMessage(JRE_ERROR11); 807 return NULL; 808 } 809 if (ret < 0) { 810 JLI_ReportErrorMessage(JRE_ERROR13); 811 return NULL; 812 } 813 814 hSplashLib = dlopen(splashPath, RTLD_LAZY | RTLD_GLOBAL); 815 // It's OK if dlopen() fails. The splash screen library binary file 816 // might have been stripped out from the JRE image to reduce its size 817 // (e.g. on embedded platforms). 818 819 if (hSplashLib) { 820 if (!SetJavaVMValue()) { 821 dlclose(hSplashLib); 822 hSplashLib = NULL; 823 } 824 } 825 } 826 if (hSplashLib) { 827 void* sym = dlsym(hSplashLib, name); 828 return sym; 829 } else { 830 return NULL; 831 } 832 } 833 834 void SplashFreeLibrary() { 835 if (hSplashLib) { 836 dlclose(hSplashLib); 837 hSplashLib = NULL; 838 } 839 } 840 841 /* 842 * Block current thread and continue execution in a new thread 843 */ 844 int 845 ContinueInNewThread0(int (JNICALL *continuation)(void *), jlong stack_size, void * args) { 846 int rslt; 847 pthread_t tid; 848 pthread_attr_t attr; 849 pthread_attr_init(&attr); 850 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE); 851 852 if (stack_size > 0) { 853 pthread_attr_setstacksize(&attr, stack_size); 854 } 855 856 if (pthread_create(&tid, &attr, (void *(*)(void*))continuation, (void*)args) == 0) { 857 void * tmp; 858 pthread_join(tid, &tmp); 859 rslt = (int)(intptr_t)tmp; 860 } else { 861 /* 862 * Continue execution in current thread if for some reason (e.g. out of 863 * memory/LWP) a new thread can't be created. This will likely fail 864 * later in continuation as JNI_CreateJavaVM needs to create quite a 865 * few new threads, anyway, just give it a try.. 866 */ 867 rslt = continuation(args); 868 } 869 870 pthread_attr_destroy(&attr); 871 return rslt; 872 } 873 874 void SetJavaLauncherPlatformProps() { 875 /* Linux only */ 876 } 877 878 jboolean 879 ServerClassMachine(void) { 880 return JNI_TRUE; 881 } 882 883 static JavaVM* jvmInstance = NULL; 884 static jboolean sameThread = JNI_FALSE; /* start VM in current thread */ 885 886 /* 887 * Note there is a callback on this function from the splashscreen logic, 888 * this as well SetJavaVMValue() needs to be simplified. 889 */ 890 JavaVM* 891 JLI_GetJavaVMInstance() 892 { 893 return jvmInstance; 894 } 895 896 void 897 RegisterThread() 898 { 899 objc_registerThreadWithCollector(); 900 } 901 902 static void 903 SetXDockArgForAWT(const char *arg) 904 { 905 char envVar[80]; 906 if (strstr(arg, "-Xdock:name=") == arg) { 907 /* 908 * The APP_NAME_<pid> environment variable is used to pass 909 * an application name as specified with the -Xdock:name command 910 * line option from Java launcher code to the AWT code in order 911 * to assign this name to the app's dock tile on the Mac. 912 * The _<pid> part is added to avoid collisions with child processes. 913 * 914 * WARNING: This environment variable is an implementation detail and 915 * isn't meant for use outside of the core platform. The mechanism for 916 * passing this information from Java launcher to other modules may 917 * change drastically between update release, and it may even be 918 * removed or replaced with another mechanism. 919 * 920 * NOTE: It is used by SWT, and JavaFX. 921 */ 922 snprintf(envVar, sizeof(envVar), "APP_NAME_%d", getpid()); 923 setenv(envVar, (arg + 12), 1); 924 } 925 926 if (strstr(arg, "-Xdock:icon=") == arg) { 927 /* 928 * The APP_ICON_<pid> environment variable is used to pass 929 * an application icon as specified with the -Xdock:icon command 930 * line option from Java launcher code to the AWT code in order 931 * to assign this icon to the app's dock tile on the Mac. 932 * The _<pid> part is added to avoid collisions with child processes. 933 * 934 * WARNING: This environment variable is an implementation detail and 935 * isn't meant for use outside of the core platform. The mechanism for 936 * passing this information from Java launcher to other modules may 937 * change drastically between update release, and it may even be 938 * removed or replaced with another mechanism. 939 * 940 * NOTE: It is used by SWT, and JavaFX. 941 */ 942 snprintf(envVar, sizeof(envVar), "APP_ICON_%d", getpid()); 943 setenv(envVar, (arg + 12), 1); 944 } 945 } 946 947 static void 948 SetMainClassForAWT(JNIEnv *env, jclass mainClass) { 949 jclass classClass = NULL; 950 NULL_CHECK(classClass = FindBootStrapClass(env, "java/lang/Class")); 951 952 jmethodID getCanonicalNameMID = NULL; 953 NULL_CHECK(getCanonicalNameMID = (*env)->GetMethodID(env, classClass, "getCanonicalName", "()Ljava/lang/String;")); 954 955 jstring mainClassString = (*env)->CallObjectMethod(env, mainClass, getCanonicalNameMID); 956 if ((*env)->ExceptionCheck(env)) { 957 /* 958 * Clears all errors caused by getCanonicalName() on the mainclass and 959 * leaves the JAVA_MAIN_CLASS__<pid> empty. 960 */ 961 (*env)->ExceptionClear(env); 962 return; 963 } 964 965 const char *mainClassName = NULL; 966 NULL_CHECK(mainClassName = (*env)->GetStringUTFChars(env, mainClassString, NULL)); 967 968 char envVar[80]; 969 /* 970 * The JAVA_MAIN_CLASS_<pid> environment variable is used to pass 971 * the name of a Java class whose main() method is invoked by 972 * the Java launcher code to start the application, to the AWT code 973 * in order to assign the name to the Apple menu bar when the app 974 * is active on the Mac. 975 * The _<pid> part is added to avoid collisions with child processes. 976 * 977 * WARNING: This environment variable is an implementation detail and 978 * isn't meant for use outside of the core platform. The mechanism for 979 * passing this information from Java launcher to other modules may 980 * change drastically between update release, and it may even be 981 * removed or replaced with another mechanism. 982 * 983 * NOTE: It is used by SWT, and JavaFX. 984 */ 985 snprintf(envVar, sizeof(envVar), "JAVA_MAIN_CLASS_%d", getpid()); 986 setenv(envVar, mainClassName, 1); 987 988 (*env)->ReleaseStringUTFChars(env, mainClassString, mainClassName); 989 } 990 991 void 992 SetXStartOnFirstThreadArg() 993 { 994 // XXX: BEGIN HACK 995 // short circuit hack for <https://bugs.eclipse.org/bugs/show_bug.cgi?id=211625> 996 // need a way to get AWT/Swing apps launched when spawned from Eclipse, 997 // which currently has no UI to not pass the -XstartOnFirstThread option 998 if (getenv("HACK_IGNORE_START_ON_FIRST_THREAD") != NULL) return; 999 // XXX: END HACK 1000 1001 sameThread = JNI_TRUE; 1002 // Set a variable that tells us we started on the main thread. 1003 // This is used by the AWT during startup. (See LWCToolkit.m) 1004 char envVar[80]; 1005 snprintf(envVar, sizeof(envVar), "JAVA_STARTED_ON_FIRST_THREAD_%d", getpid()); 1006 setenv(envVar, "1", 1); 1007 } 1008 1009 /* This class is made for performSelectorOnMainThread when java main 1010 * should be launched on main thread. 1011 * We cannot use dispatch_sync here, because it blocks the main dispatch queue 1012 * which is used inside Cocoa 1013 */ 1014 @interface JavaLaunchHelper : NSObject { 1015 int _returnValue; 1016 } 1017 - (void) launchJava:(NSValue*)argsValue; 1018 - (int) getReturnValue; 1019 @end 1020 1021 @implementation JavaLaunchHelper 1022 1023 - (void) launchJava:(NSValue*)argsValue 1024 { 1025 _returnValue = JavaMain([argsValue pointerValue]); 1026 } 1027 1028 - (int) getReturnValue 1029 { 1030 return _returnValue; 1031 } 1032 1033 @end 1034 1035 // MacOSX we may continue in the same thread 1036 int 1037 JVMInit(InvocationFunctions* ifn, jlong threadStackSize, 1038 int argc, char **argv, 1039 int mode, char *what, int ret) { 1040 if (sameThread) { 1041 JLI_TraceLauncher("In same thread\n"); 1042 // need to block this thread against the main thread 1043 // so signals get caught correctly 1044 JavaMainArgs args; 1045 args.argc = argc; 1046 args.argv = argv; 1047 args.mode = mode; 1048 args.what = what; 1049 args.ifn = *ifn; 1050 int rslt; 1051 NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; 1052 { 1053 JavaLaunchHelper* launcher = [[[JavaLaunchHelper alloc] init] autorelease]; 1054 [launcher performSelectorOnMainThread:@selector(launchJava:) 1055 withObject:[NSValue valueWithPointer:(void*)&args] 1056 waitUntilDone:YES]; 1057 rslt = [launcher getReturnValue]; 1058 } 1059 [pool drain]; 1060 return rslt; 1061 } else { 1062 return ContinueInNewThread(ifn, threadStackSize, argc, argv, mode, what, ret); 1063 } 1064 } 1065 1066 /* 1067 * Note the jvmInstance must be initialized first before entering into 1068 * ShowSplashScreen, as there is a callback into the JLI_GetJavaVMInstance. 1069 */ 1070 void PostJVMInit(JNIEnv *env, jclass mainClass, JavaVM *vm) { 1071 jvmInstance = vm; 1072 SetMainClassForAWT(env, mainClass); 1073 CHECK_EXCEPTION_RETURN(); 1074 ShowSplashScreen(); 1075 } 1076 1077 jboolean 1078 ProcessPlatformOption(const char* arg) 1079 { 1080 if (JLI_StrCmp(arg, "-XstartOnFirstThread") == 0) { 1081 SetXStartOnFirstThreadArg(); 1082 return JNI_TRUE; 1083 } else if (JLI_StrCCmp(arg, "-Xdock:") == 0) { 1084 SetXDockArgForAWT(arg); 1085 return JNI_TRUE; 1086 } 1087 // arguments we know not 1088 return JNI_FALSE; 1089 }