1 /* 2 * Copyright (c) 2012, 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 <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 * (processes version options, 140 * creates argument list for vm, 141 * etc.) 142 * | 143 * | 144 * \|/ 145 * POINT A 146 * | 147 * | 148 * \|/ 149 * Path is desired JRE ? YES --> Continue 150 * NO 151 * | 152 * | 153 * \|/ 154 * Paths have well known 155 * jvm paths ? --> NO --> Continue 156 * YES 157 * | 158 * | 159 * \|/ 160 * Does libjvm.so exist 161 * in any of them ? --> NO --> Continue 162 * YES 163 * | 164 * | 165 * \|/ 166 * Re-exec / Spawn 167 * | 168 * | 169 * \|/ 170 * Main 171 */ 172 173 /* Store the name of the executable once computed */ 174 static char *execname = NULL; 175 176 /* 177 * execname accessor from other parts of platform dependent logic 178 */ 179 const char * 180 GetExecName() { 181 return execname; 182 } 183 184 /* 185 * Exports the JNI interface from libjli 186 * 187 * This allows client code to link against the .jre/.jdk bundles, 188 * and not worry about trying to pick a HotSpot to link against. 189 * 190 * Switching architectures is unsupported, since client code has 191 * made that choice before the JVM was requested. 192 */ 193 194 static InvocationFunctions *sExportedJNIFunctions = NULL; 195 static char *sPreferredJVMType = NULL; 196 197 static InvocationFunctions *GetExportedJNIFunctions() { 198 if (sExportedJNIFunctions != NULL) return sExportedJNIFunctions; 199 200 char jrePath[PATH_MAX]; 201 jboolean gotJREPath = GetJREPath(jrePath, sizeof(jrePath), JNI_FALSE); 202 if (!gotJREPath) { 203 JLI_ReportErrorMessage("Failed to GetJREPath()"); 204 return NULL; 205 } 206 207 char *preferredJVM = sPreferredJVMType; 208 if (preferredJVM == NULL) { 209 #if defined(__i386__) 210 preferredJVM = "client"; 211 #elif defined(__x86_64__) 212 preferredJVM = "server"; 213 #else 214 #error "Unknown architecture - needs definition" 215 #endif 216 } 217 218 char jvmPath[PATH_MAX]; 219 jboolean gotJVMPath = GetJVMPath(jrePath, preferredJVM, jvmPath, sizeof(jvmPath)); 220 if (!gotJVMPath) { 221 JLI_ReportErrorMessage("Failed to GetJVMPath()"); 222 return NULL; 223 } 224 225 InvocationFunctions *fxns = malloc(sizeof(InvocationFunctions)); 226 jboolean vmLoaded = LoadJavaVM(jvmPath, fxns); 227 if (!vmLoaded) { 228 JLI_ReportErrorMessage("Failed to LoadJavaVM()"); 229 return NULL; 230 } 231 232 return sExportedJNIFunctions = fxns; 233 } 234 235 #ifndef STATIC_BUILD 236 237 JNIEXPORT jint JNICALL 238 JNI_GetDefaultJavaVMInitArgs(void *args) { 239 InvocationFunctions *ifn = GetExportedJNIFunctions(); 240 if (ifn == NULL) return JNI_ERR; 241 return ifn->GetDefaultJavaVMInitArgs(args); 242 } 243 244 JNIEXPORT jint JNICALL 245 JNI_CreateJavaVM(JavaVM **pvm, void **penv, void *args) { 246 InvocationFunctions *ifn = GetExportedJNIFunctions(); 247 if (ifn == NULL) return JNI_ERR; 248 return ifn->CreateJavaVM(pvm, penv, args); 249 } 250 251 JNIEXPORT jint JNICALL 252 JNI_GetCreatedJavaVMs(JavaVM **vmBuf, jsize bufLen, jsize *nVMs) { 253 InvocationFunctions *ifn = GetExportedJNIFunctions(); 254 if (ifn == NULL) return JNI_ERR; 255 return ifn->GetCreatedJavaVMs(vmBuf, bufLen, nVMs); 256 } 257 #endif 258 259 /* 260 * Allow JLI-aware launchers to specify a client/server preference 261 */ 262 JNIEXPORT void JNICALL 263 JLI_SetPreferredJVM(const char *prefJVM) { 264 if (sPreferredJVMType != NULL) { 265 free(sPreferredJVMType); 266 sPreferredJVMType = NULL; 267 } 268 269 if (prefJVM == NULL) return; 270 sPreferredJVMType = strdup(prefJVM); 271 } 272 273 static BOOL awtLoaded = NO; 274 static pthread_mutex_t awtLoaded_mutex = PTHREAD_MUTEX_INITIALIZER; 275 static pthread_cond_t awtLoaded_cv = PTHREAD_COND_INITIALIZER; 276 277 JNIEXPORT void JNICALL 278 JLI_NotifyAWTLoaded() 279 { 280 pthread_mutex_lock(&awtLoaded_mutex); 281 awtLoaded = YES; 282 pthread_cond_signal(&awtLoaded_cv); 283 pthread_mutex_unlock(&awtLoaded_mutex); 284 } 285 286 static int (*main_fptr)(int argc, char **argv) = NULL; 287 288 /* 289 * Unwrap the arguments and re-run main() 290 */ 291 static void *apple_main (void *arg) 292 { 293 objc_registerThreadWithCollector(); 294 295 if (main_fptr == NULL) { 296 #ifdef STATIC_BUILD 297 extern int main(int argc, char **argv); 298 main_fptr = &main; 299 #else 300 main_fptr = (int (*)())dlsym(RTLD_DEFAULT, "main"); 301 #endif 302 if (main_fptr == NULL) { 303 JLI_ReportErrorMessageSys("error locating main entrypoint\n"); 304 exit(1); 305 } 306 } 307 308 struct NSAppArgs *args = (struct NSAppArgs *) arg; 309 exit(main_fptr(args->argc, args->argv)); 310 } 311 312 static void dummyTimer(CFRunLoopTimerRef timer, void *info) {} 313 314 static void ParkEventLoop() { 315 // RunLoop needs at least one source, and 1e20 is pretty far into the future 316 CFRunLoopTimerRef t = CFRunLoopTimerCreate(kCFAllocatorDefault, 1.0e20, 0.0, 0, 0, dummyTimer, NULL); 317 CFRunLoopAddTimer(CFRunLoopGetCurrent(), t, kCFRunLoopDefaultMode); 318 CFRelease(t); 319 320 // Park this thread in the main run loop. 321 int32_t result; 322 do { 323 result = CFRunLoopRunInMode(kCFRunLoopDefaultMode, 1.0e20, false); 324 } while (result != kCFRunLoopRunFinished); 325 } 326 327 /* 328 * Mac OS X mandates that the GUI event loop run on very first thread of 329 * an application. This requires that we re-call Java's main() on a new 330 * thread, reserving the 'main' thread for Cocoa. 331 */ 332 static void MacOSXStartup(int argc, char *argv[]) { 333 // Thread already started? 334 static jboolean started = false; 335 if (started) { 336 return; 337 } 338 started = true; 339 340 // Hand off arguments 341 struct NSAppArgs args; 342 args.argc = argc; 343 args.argv = argv; 344 345 // Fire up the main thread 346 pthread_t main_thr; 347 if (pthread_create(&main_thr, NULL, &apple_main, &args) != 0) { 348 JLI_ReportErrorMessageSys("Could not create main thread: %s\n", strerror(errno)); 349 exit(1); 350 } 351 if (pthread_detach(main_thr)) { 352 JLI_ReportErrorMessageSys("pthread_detach() failed: %s\n", strerror(errno)); 353 exit(1); 354 } 355 356 ParkEventLoop(); 357 } 358 359 void 360 CreateExecutionEnvironment(int *pargc, char ***pargv, 361 char jrepath[], jint so_jrepath, 362 char jvmpath[], jint so_jvmpath, 363 char jvmcfg[], jint so_jvmcfg) { 364 jboolean jvmpathExists; 365 366 /* Compute/set the name of the executable */ 367 SetExecname(*pargv); 368 369 char * jvmtype = NULL; 370 int argc = *pargc; 371 char **argv = *pargv; 372 373 /* Find out where the JRE is that we will be using. */ 374 if (!GetJREPath(jrepath, so_jrepath, JNI_FALSE) ) { 375 JLI_ReportErrorMessage(JRE_ERROR1); 376 exit(2); 377 } 378 JLI_Snprintf(jvmcfg, so_jvmcfg, "%s%slib%sjvm.cfg", 379 jrepath, FILESEP, FILESEP); 380 /* Find the specified JVM type */ 381 if (ReadKnownVMs(jvmcfg, JNI_FALSE) < 1) { 382 JLI_ReportErrorMessage(CFG_ERROR7); 383 exit(1); 384 } 385 386 jvmpath[0] = '\0'; 387 jvmtype = CheckJvmType(pargc, pargv, JNI_FALSE); 388 if (JLI_StrCmp(jvmtype, "ERROR") == 0) { 389 JLI_ReportErrorMessage(CFG_ERROR9); 390 exit(4); 391 } 392 393 if (!GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath)) { 394 JLI_ReportErrorMessage(CFG_ERROR8, jvmtype, jvmpath); 395 exit(4); 396 } 397 398 /* 399 * Mac OS X requires the Cocoa event loop to be run on the "main" 400 * thread. Spawn off a new thread to run main() and pass 401 * this thread off to the Cocoa event loop. 402 */ 403 MacOSXStartup(argc, argv); 404 405 /* 406 * we seem to have everything we need 407 */ 408 return; 409 } 410 411 /* 412 * VM choosing is done by the launcher (java.c). 413 */ 414 static jboolean 415 GetJVMPath(const char *jrepath, const char *jvmtype, 416 char *jvmpath, jint jvmpathsize) 417 { 418 struct stat s; 419 420 if (JLI_StrChr(jvmtype, '/')) { 421 JLI_Snprintf(jvmpath, jvmpathsize, "%s/" JVM_DLL, jvmtype); 422 } else { 423 /* 424 * macosx client library is built thin, i386 only. 425 * 64 bit client requests must load server library 426 */ 427 JLI_Snprintf(jvmpath, jvmpathsize, "%s/lib/%s/" JVM_DLL, jrepath, jvmtype); 428 } 429 430 JLI_TraceLauncher("Does `%s' exist ... ", jvmpath); 431 432 #ifdef STATIC_BUILD 433 return JNI_TRUE; 434 #else 435 if (stat(jvmpath, &s) == 0) { 436 JLI_TraceLauncher("yes.\n"); 437 return JNI_TRUE; 438 } else { 439 JLI_TraceLauncher("no.\n"); 440 return JNI_FALSE; 441 } 442 #endif 443 } 444 445 /* 446 * Find path to JRE based on .exe's location or registry settings. 447 */ 448 static jboolean 449 GetJREPath(char *path, jint pathsize, jboolean speculative) 450 { 451 char libjava[MAXPATHLEN]; 452 453 if (GetApplicationHome(path, pathsize)) { 454 /* Is JRE co-located with the application? */ 455 #ifdef STATIC_BUILD 456 char jvm_cfg[MAXPATHLEN]; 457 JLI_Snprintf(jvm_cfg, sizeof(jvm_cfg), "%s/lib/jvm.cfg", path); 458 if (access(jvm_cfg, F_OK) == 0) { 459 return JNI_TRUE; 460 } 461 #else 462 JLI_Snprintf(libjava, sizeof(libjava), "%s/lib/" JAVA_DLL, path); 463 if (access(libjava, F_OK) == 0) { 464 return JNI_TRUE; 465 } 466 #endif 467 /* ensure storage for path + /jre + NULL */ 468 if ((JLI_StrLen(path) + 4 + 1) > (size_t) pathsize) { 469 JLI_TraceLauncher("Insufficient space to store JRE path\n"); 470 return JNI_FALSE; 471 } 472 /* Does the app ship a private JRE in <apphome>/jre directory? */ 473 JLI_Snprintf(libjava, sizeof(libjava), "%s/jre/lib/" JAVA_DLL, path); 474 if (access(libjava, F_OK) == 0) { 475 JLI_StrCat(path, "/jre"); 476 JLI_TraceLauncher("JRE path is %s\n", path); 477 return JNI_TRUE; 478 } 479 } 480 481 /* try to find ourselves instead */ 482 Dl_info selfInfo; 483 dladdr(&GetJREPath, &selfInfo); 484 485 #ifdef STATIC_BUILD 486 char jvm_cfg[MAXPATHLEN]; 487 char *p = NULL; 488 strncpy(jvm_cfg, selfInfo.dli_fname, MAXPATHLEN); 489 p = strrchr(jvm_cfg, '/'); *p = '\0'; 490 p = strrchr(jvm_cfg, '/'); 491 if (strcmp(p, "/.") == 0) { 492 *p = '\0'; 493 p = strrchr(jvm_cfg, '/'); *p = '\0'; 494 } 495 else *p = '\0'; 496 strncpy(path, jvm_cfg, pathsize); 497 strncat(jvm_cfg, "/lib/jvm.cfg", MAXPATHLEN); 498 if (access(jvm_cfg, F_OK) == 0) { 499 return JNI_TRUE; 500 } 501 #endif 502 503 char *realPathToSelf = realpath(selfInfo.dli_fname, path); 504 if (realPathToSelf != path) { 505 return JNI_FALSE; 506 } 507 508 size_t pathLen = strlen(realPathToSelf); 509 if (pathLen == 0) { 510 return JNI_FALSE; 511 } 512 513 const char lastPathComponent[] = "/lib/jli/libjli.dylib"; 514 size_t sizeOfLastPathComponent = sizeof(lastPathComponent) - 1; 515 if (pathLen < sizeOfLastPathComponent) { 516 return JNI_FALSE; 517 } 518 519 size_t indexOfLastPathComponent = pathLen - sizeOfLastPathComponent; 520 if (0 == strncmp(realPathToSelf + indexOfLastPathComponent, lastPathComponent, sizeOfLastPathComponent - 1)) { 521 realPathToSelf[indexOfLastPathComponent + 1] = '\0'; 522 return JNI_TRUE; 523 } 524 525 if (!speculative) 526 JLI_ReportErrorMessage(JRE_ERROR8 JAVA_DLL); 527 return JNI_FALSE; 528 } 529 530 jboolean 531 LoadJavaVM(const char *jvmpath, InvocationFunctions *ifn) 532 { 533 Dl_info dlinfo; 534 void *libjvm; 535 536 JLI_TraceLauncher("JVM path is %s\n", jvmpath); 537 538 #ifndef STATIC_BUILD 539 libjvm = dlopen(jvmpath, RTLD_NOW + RTLD_GLOBAL); 540 #else 541 libjvm = dlopen(NULL, RTLD_FIRST); 542 #endif 543 if (libjvm == NULL) { 544 JLI_ReportErrorMessage(DLL_ERROR1, __LINE__); 545 JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror()); 546 return JNI_FALSE; 547 } 548 549 ifn->CreateJavaVM = (CreateJavaVM_t) 550 dlsym(libjvm, "JNI_CreateJavaVM"); 551 if (ifn->CreateJavaVM == NULL) { 552 JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror()); 553 return JNI_FALSE; 554 } 555 556 ifn->GetDefaultJavaVMInitArgs = (GetDefaultJavaVMInitArgs_t) 557 dlsym(libjvm, "JNI_GetDefaultJavaVMInitArgs"); 558 if (ifn->GetDefaultJavaVMInitArgs == NULL) { 559 JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror()); 560 return JNI_FALSE; 561 } 562 563 ifn->GetCreatedJavaVMs = (GetCreatedJavaVMs_t) 564 dlsym(libjvm, "JNI_GetCreatedJavaVMs"); 565 if (ifn->GetCreatedJavaVMs == NULL) { 566 JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror()); 567 return JNI_FALSE; 568 } 569 570 return JNI_TRUE; 571 } 572 573 /* 574 * Compute the name of the executable 575 * 576 * In order to re-exec securely we need the absolute path of the 577 * executable. On Solaris getexecname(3c) may not return an absolute 578 * path so we use dladdr to get the filename of the executable and 579 * then use realpath to derive an absolute path. From Solaris 9 580 * onwards the filename returned in DL_info structure from dladdr is 581 * an absolute pathname so technically realpath isn't required. 582 * On Linux we read the executable name from /proc/self/exe. 583 * As a fallback, and for platforms other than Solaris and Linux, 584 * we use FindExecName to compute the executable name. 585 */ 586 const char* 587 SetExecname(char **argv) 588 { 589 char* exec_path = NULL; 590 { 591 Dl_info dlinfo; 592 593 #ifdef STATIC_BUILD 594 void *fptr; 595 fptr = (void *)&SetExecname; 596 #else 597 int (*fptr)(); 598 fptr = (int (*)())dlsym(RTLD_DEFAULT, "main"); 599 #endif 600 if (fptr == NULL) { 601 JLI_ReportErrorMessage(DLL_ERROR3, dlerror()); 602 return JNI_FALSE; 603 } 604 605 if (dladdr((void*)fptr, &dlinfo)) { 606 char *resolved = (char*)JLI_MemAlloc(PATH_MAX+1); 607 if (resolved != NULL) { 608 exec_path = realpath(dlinfo.dli_fname, resolved); 609 if (exec_path == NULL) { 610 JLI_MemFree(resolved); 611 } 612 } 613 } 614 } 615 if (exec_path == NULL) { 616 exec_path = FindExecName(argv[0]); 617 } 618 execname = exec_path; 619 return exec_path; 620 } 621 622 /* 623 * BSD's implementation of CounterGet() 624 */ 625 int64_t 626 CounterGet() 627 { 628 struct timeval tv; 629 gettimeofday(&tv, NULL); 630 return (tv.tv_sec * 1000) + tv.tv_usec; 631 } 632 633 634 /* --- Splash Screen shared library support --- */ 635 636 static JavaVM* SetJavaVMValue() 637 { 638 JavaVM * jvm = NULL; 639 640 // The handle is good for both the launcher and the libosxapp.dylib 641 void * handle = dlopen(NULL, RTLD_LAZY | RTLD_GLOBAL); 642 if (handle) { 643 typedef JavaVM* (*JLI_GetJavaVMInstance_t)(); 644 645 JLI_GetJavaVMInstance_t JLI_GetJavaVMInstance = 646 (JLI_GetJavaVMInstance_t)dlsym(handle, 647 "JLI_GetJavaVMInstance"); 648 if (JLI_GetJavaVMInstance) { 649 jvm = JLI_GetJavaVMInstance(); 650 } 651 652 if (jvm) { 653 typedef void (*OSXAPP_SetJavaVM_t)(JavaVM*); 654 655 OSXAPP_SetJavaVM_t OSXAPP_SetJavaVM = 656 (OSXAPP_SetJavaVM_t)dlsym(handle, "OSXAPP_SetJavaVM"); 657 if (OSXAPP_SetJavaVM) { 658 OSXAPP_SetJavaVM(jvm); 659 } else { 660 jvm = NULL; 661 } 662 } 663 664 dlclose(handle); 665 } 666 667 return jvm; 668 } 669 670 static const char* SPLASHSCREEN_SO = JNI_LIB_NAME("splashscreen"); 671 672 static void* hSplashLib = NULL; 673 674 void* SplashProcAddress(const char* name) { 675 if (!hSplashLib) { 676 char jrePath[PATH_MAX]; 677 if (!GetJREPath(jrePath, sizeof(jrePath), JNI_FALSE)) { 678 JLI_ReportErrorMessage(JRE_ERROR1); 679 return NULL; 680 } 681 682 char splashPath[PATH_MAX]; 683 const int ret = JLI_Snprintf(splashPath, sizeof(splashPath), 684 "%s/lib/%s", jrePath, SPLASHSCREEN_SO); 685 if (ret >= (int)sizeof(splashPath)) { 686 JLI_ReportErrorMessage(JRE_ERROR11); 687 return NULL; 688 } 689 if (ret < 0) { 690 JLI_ReportErrorMessage(JRE_ERROR13); 691 return NULL; 692 } 693 694 hSplashLib = dlopen(splashPath, RTLD_LAZY | RTLD_GLOBAL); 695 // It's OK if dlopen() fails. The splash screen library binary file 696 // might have been stripped out from the JRE image to reduce its size 697 // (e.g. on embedded platforms). 698 699 if (hSplashLib) { 700 if (!SetJavaVMValue()) { 701 dlclose(hSplashLib); 702 hSplashLib = NULL; 703 } 704 } 705 } 706 if (hSplashLib) { 707 void* sym = dlsym(hSplashLib, name); 708 return sym; 709 } else { 710 return NULL; 711 } 712 } 713 714 void SplashFreeLibrary() { 715 if (hSplashLib) { 716 dlclose(hSplashLib); 717 hSplashLib = NULL; 718 } 719 } 720 721 /* 722 * Block current thread and continue execution in a new thread 723 */ 724 int 725 ContinueInNewThread0(int (JNICALL *continuation)(void *), jlong stack_size, void * args) { 726 int rslt; 727 pthread_t tid; 728 pthread_attr_t attr; 729 pthread_attr_init(&attr); 730 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE); 731 732 if (stack_size > 0) { 733 pthread_attr_setstacksize(&attr, stack_size); 734 } 735 pthread_attr_setguardsize(&attr, 0); // no pthread guard page on java threads 736 737 if (pthread_create(&tid, &attr, (void *(*)(void*))continuation, (void*)args) == 0) { 738 void * tmp; 739 pthread_join(tid, &tmp); 740 rslt = (int)(intptr_t)tmp; 741 } else { 742 /* 743 * Continue execution in current thread if for some reason (e.g. out of 744 * memory/LWP) a new thread can't be created. This will likely fail 745 * later in continuation as JNI_CreateJavaVM needs to create quite a 746 * few new threads, anyway, just give it a try.. 747 */ 748 rslt = continuation(args); 749 } 750 751 pthread_attr_destroy(&attr); 752 return rslt; 753 } 754 755 void SetJavaLauncherPlatformProps() { 756 /* Linux only */ 757 } 758 759 static JavaVM* jvmInstance = NULL; 760 static jboolean sameThread = JNI_FALSE; /* start VM in current thread */ 761 762 /* 763 * Note there is a callback on this function from the splashscreen logic, 764 * this as well SetJavaVMValue() needs to be simplified. 765 */ 766 JavaVM* 767 JLI_GetJavaVMInstance() 768 { 769 return jvmInstance; 770 } 771 772 void 773 RegisterThread() 774 { 775 objc_registerThreadWithCollector(); 776 } 777 778 static void 779 SetXDockArgForAWT(const char *arg) 780 { 781 char envVar[80]; 782 if (strstr(arg, "-Xdock:name=") == arg) { 783 /* 784 * The APP_NAME_<pid> environment variable is used to pass 785 * an application name as specified with the -Xdock:name command 786 * line option from Java launcher code to the AWT code in order 787 * to assign this name to the app's dock tile on the Mac. 788 * The _<pid> part is added to avoid collisions with child processes. 789 * 790 * WARNING: This environment variable is an implementation detail and 791 * isn't meant for use outside of the core platform. The mechanism for 792 * passing this information from Java launcher to other modules may 793 * change drastically between update release, and it may even be 794 * removed or replaced with another mechanism. 795 * 796 * NOTE: It is used by SWT, and JavaFX. 797 */ 798 snprintf(envVar, sizeof(envVar), "APP_NAME_%d", getpid()); 799 setenv(envVar, (arg + 12), 1); 800 } 801 802 if (strstr(arg, "-Xdock:icon=") == arg) { 803 /* 804 * The APP_ICON_<pid> environment variable is used to pass 805 * an application icon as specified with the -Xdock:icon command 806 * line option from Java launcher code to the AWT code in order 807 * to assign this icon to the app's dock tile on the Mac. 808 * The _<pid> part is added to avoid collisions with child processes. 809 * 810 * WARNING: This environment variable is an implementation detail and 811 * isn't meant for use outside of the core platform. The mechanism for 812 * passing this information from Java launcher to other modules may 813 * change drastically between update release, and it may even be 814 * removed or replaced with another mechanism. 815 * 816 * NOTE: It is used by SWT, and JavaFX. 817 */ 818 snprintf(envVar, sizeof(envVar), "APP_ICON_%d", getpid()); 819 setenv(envVar, (arg + 12), 1); 820 } 821 } 822 823 static void 824 SetMainClassForAWT(JNIEnv *env, jclass mainClass) { 825 jclass classClass = NULL; 826 NULL_CHECK(classClass = FindBootStrapClass(env, "java/lang/Class")); 827 828 jmethodID getCanonicalNameMID = NULL; 829 NULL_CHECK(getCanonicalNameMID = (*env)->GetMethodID(env, classClass, "getCanonicalName", "()Ljava/lang/String;")); 830 831 jstring mainClassString = (*env)->CallObjectMethod(env, mainClass, getCanonicalNameMID); 832 if ((*env)->ExceptionCheck(env)) { 833 /* 834 * Clears all errors caused by getCanonicalName() on the mainclass and 835 * leaves the JAVA_MAIN_CLASS__<pid> empty. 836 */ 837 (*env)->ExceptionClear(env); 838 return; 839 } 840 841 const char *mainClassName = NULL; 842 NULL_CHECK(mainClassName = (*env)->GetStringUTFChars(env, mainClassString, NULL)); 843 844 char envVar[80]; 845 /* 846 * The JAVA_MAIN_CLASS_<pid> environment variable is used to pass 847 * the name of a Java class whose main() method is invoked by 848 * the Java launcher code to start the application, to the AWT code 849 * in order to assign the name to the Apple menu bar when the app 850 * is active on the Mac. 851 * The _<pid> part is added to avoid collisions with child processes. 852 * 853 * WARNING: This environment variable is an implementation detail and 854 * isn't meant for use outside of the core platform. The mechanism for 855 * passing this information from Java launcher to other modules may 856 * change drastically between update release, and it may even be 857 * removed or replaced with another mechanism. 858 * 859 * NOTE: It is used by SWT, and JavaFX. 860 */ 861 snprintf(envVar, sizeof(envVar), "JAVA_MAIN_CLASS_%d", getpid()); 862 setenv(envVar, mainClassName, 1); 863 864 (*env)->ReleaseStringUTFChars(env, mainClassString, mainClassName); 865 } 866 867 void 868 SetXStartOnFirstThreadArg() 869 { 870 // XXX: BEGIN HACK 871 // short circuit hack for <https://bugs.eclipse.org/bugs/show_bug.cgi?id=211625> 872 // need a way to get AWT/Swing apps launched when spawned from Eclipse, 873 // which currently has no UI to not pass the -XstartOnFirstThread option 874 if (getenv("HACK_IGNORE_START_ON_FIRST_THREAD") != NULL) return; 875 // XXX: END HACK 876 877 sameThread = JNI_TRUE; 878 // Set a variable that tells us we started on the main thread. 879 // This is used by the AWT during startup. (See LWCToolkit.m) 880 char envVar[80]; 881 snprintf(envVar, sizeof(envVar), "JAVA_STARTED_ON_FIRST_THREAD_%d", getpid()); 882 setenv(envVar, "1", 1); 883 } 884 885 // MacOSX we may continue in the same thread 886 int 887 JVMInit(InvocationFunctions* ifn, jlong threadStackSize, 888 int argc, char **argv, 889 int mode, char *what, int ret) { 890 if (sameThread) { 891 JLI_TraceLauncher("In same thread\n"); 892 // need to block this thread against the main thread 893 // so signals get caught correctly 894 __block int rslt = 0; 895 NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; 896 { 897 NSBlockOperation *op = [NSBlockOperation blockOperationWithBlock: ^{ 898 JavaMainArgs args; 899 args.argc = argc; 900 args.argv = argv; 901 args.mode = mode; 902 args.what = what; 903 args.ifn = *ifn; 904 rslt = JavaMain(&args); 905 }]; 906 907 /* 908 * We cannot use dispatch_sync here, because it blocks the main dispatch queue. 909 * Using the main NSRunLoop allows the dispatch queue to run properly once 910 * SWT (or whatever toolkit this is needed for) kicks off it's own NSRunLoop 911 * and starts running. 912 */ 913 [op performSelectorOnMainThread:@selector(start) withObject:nil waitUntilDone:YES]; 914 } 915 [pool drain]; 916 return rslt; 917 } else { 918 return ContinueInNewThread(ifn, threadStackSize, argc, argv, mode, what, ret); 919 } 920 } 921 922 /* 923 * Note the jvmInstance must be initialized first before entering into 924 * ShowSplashScreen, as there is a callback into the JLI_GetJavaVMInstance. 925 */ 926 void PostJVMInit(JNIEnv *env, jclass mainClass, JavaVM *vm) { 927 jvmInstance = vm; 928 SetMainClassForAWT(env, mainClass); 929 CHECK_EXCEPTION_RETURN(); 930 ShowSplashScreen(); 931 } 932 933 jboolean 934 ProcessPlatformOption(const char* arg) 935 { 936 if (JLI_StrCmp(arg, "-XstartOnFirstThread") == 0) { 937 SetXStartOnFirstThreadArg(); 938 return JNI_TRUE; 939 } else if (JLI_StrCCmp(arg, "-Xdock:") == 0) { 940 SetXDockArgForAWT(arg); 941 return JNI_TRUE; 942 } 943 // arguments we know not 944 return JNI_FALSE; 945 }