1 /*
2 * Copyright (c) 2012, 2019, 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 if (main_fptr == NULL) {
294 #ifdef STATIC_BUILD
295 extern int main(int argc, char **argv);
296 main_fptr = &main;
297 #else
298 main_fptr = (int (*)())dlsym(RTLD_DEFAULT, "main");
299 #endif
300 if (main_fptr == NULL) {
301 JLI_ReportErrorMessageSys("error locating main entrypoint\n");
302 exit(1);
303 }
304 }
305
306 struct NSAppArgs *args = (struct NSAppArgs *) arg;
307 exit(main_fptr(args->argc, args->argv));
308 }
309
310 static void dummyTimer(CFRunLoopTimerRef timer, void *info) {}
311
312 static void ParkEventLoop() {
313 // RunLoop needs at least one source, and 1e20 is pretty far into the future
314 CFRunLoopTimerRef t = CFRunLoopTimerCreate(kCFAllocatorDefault, 1.0e20, 0.0, 0, 0, dummyTimer, NULL);
315 CFRunLoopAddTimer(CFRunLoopGetCurrent(), t, kCFRunLoopDefaultMode);
316 CFRelease(t);
317
318 // Park this thread in the main run loop.
319 int32_t result;
320 do {
321 result = CFRunLoopRunInMode(kCFRunLoopDefaultMode, 1.0e20, false);
322 } while (result != kCFRunLoopRunFinished);
323 }
324
325 /*
326 * Mac OS X mandates that the GUI event loop run on very first thread of
327 * an application. This requires that we re-call Java's main() on a new
328 * thread, reserving the 'main' thread for Cocoa.
329 */
330 static void MacOSXStartup(int argc, char *argv[]) {
331 // Thread already started?
332 static jboolean started = false;
333 if (started) {
334 return;
335 }
336 started = true;
337
338 // Hand off arguments
339 struct NSAppArgs args;
340 args.argc = argc;
341 args.argv = argv;
342
343 // Fire up the main thread
344 pthread_t main_thr;
345 if (pthread_create(&main_thr, NULL, &apple_main, &args) != 0) {
346 JLI_ReportErrorMessageSys("Could not create main thread: %s\n", strerror(errno));
347 exit(1);
348 }
349 if (pthread_detach(main_thr)) {
350 JLI_ReportErrorMessageSys("pthread_detach() failed: %s\n", strerror(errno));
351 exit(1);
352 }
353
354 ParkEventLoop();
355 }
356
357 void
358 CreateExecutionEnvironment(int *pargc, char ***pargv,
359 char jrepath[], jint so_jrepath,
360 char jvmpath[], jint so_jvmpath,
361 char jvmcfg[], jint so_jvmcfg) {
362 jboolean jvmpathExists;
363
364 /* Compute/set the name of the executable */
365 SetExecname(*pargv);
366
367 char * jvmtype = NULL;
368 int argc = *pargc;
369 char **argv = *pargv;
370
371 /* Find out where the JRE is that we will be using. */
372 if (!GetJREPath(jrepath, so_jrepath, JNI_FALSE) ) {
373 JLI_ReportErrorMessage(JRE_ERROR1);
374 exit(2);
375 }
376 JLI_Snprintf(jvmcfg, so_jvmcfg, "%s%slib%sjvm.cfg",
377 jrepath, FILESEP, FILESEP);
378 /* Find the specified JVM type */
379 if (ReadKnownVMs(jvmcfg, JNI_FALSE) < 1) {
380 JLI_ReportErrorMessage(CFG_ERROR7);
381 exit(1);
382 }
383
384 jvmpath[0] = '\0';
385 jvmtype = CheckJvmType(pargc, pargv, JNI_FALSE);
386 if (JLI_StrCmp(jvmtype, "ERROR") == 0) {
387 JLI_ReportErrorMessage(CFG_ERROR9);
388 exit(4);
389 }
390
391 if (!GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath)) {
392 JLI_ReportErrorMessage(CFG_ERROR8, jvmtype, jvmpath);
393 exit(4);
394 }
395
396 /*
397 * Mac OS X requires the Cocoa event loop to be run on the "main"
398 * thread. Spawn off a new thread to run main() and pass
399 * this thread off to the Cocoa event loop.
400 */
401 MacOSXStartup(argc, argv);
402
403 /*
404 * we seem to have everything we need
405 */
406 return;
407 }
408
409 /*
410 * VM choosing is done by the launcher (java.c).
411 */
412 static jboolean
413 GetJVMPath(const char *jrepath, const char *jvmtype,
414 char *jvmpath, jint jvmpathsize)
415 {
416 struct stat s;
417
418 if (JLI_StrChr(jvmtype, '/')) {
419 JLI_Snprintf(jvmpath, jvmpathsize, "%s/" JVM_DLL, jvmtype);
420 } else {
421 /*
422 * macosx client library is built thin, i386 only.
423 * 64 bit client requests must load server library
424 */
425 JLI_Snprintf(jvmpath, jvmpathsize, "%s/lib/%s/" JVM_DLL, jrepath, jvmtype);
426 }
427
428 JLI_TraceLauncher("Does `%s' exist ... ", jvmpath);
429
430 #ifdef STATIC_BUILD
431 return JNI_TRUE;
432 #else
433 if (stat(jvmpath, &s) == 0) {
434 JLI_TraceLauncher("yes.\n");
435 return JNI_TRUE;
436 } else {
437 JLI_TraceLauncher("no.\n");
438 return JNI_FALSE;
439 }
440 #endif
441 }
442
443 /*
444 * Find path to JRE based on .exe's location or registry settings.
445 */
446 static jboolean
447 GetJREPath(char *path, jint pathsize, jboolean speculative)
448 {
449 char libjava[MAXPATHLEN];
450
451 if (GetApplicationHome(path, pathsize)) {
452 /* Is JRE co-located with the application? */
453 #ifdef STATIC_BUILD
454 char jvm_cfg[MAXPATHLEN];
455 JLI_Snprintf(jvm_cfg, sizeof(jvm_cfg), "%s/lib/jvm.cfg", path);
456 if (access(jvm_cfg, F_OK) == 0) {
457 return JNI_TRUE;
458 }
459 #else
460 JLI_Snprintf(libjava, sizeof(libjava), "%s/lib/" JAVA_DLL, path);
461 if (access(libjava, F_OK) == 0) {
462 return JNI_TRUE;
463 }
464 #endif
465 /* ensure storage for path + /jre + NULL */
466 if ((JLI_StrLen(path) + 4 + 1) > (size_t) pathsize) {
467 JLI_TraceLauncher("Insufficient space to store JRE path\n");
468 return JNI_FALSE;
469 }
470 /* Does the app ship a private JRE in <apphome>/jre directory? */
471 JLI_Snprintf(libjava, sizeof(libjava), "%s/jre/lib/" JAVA_DLL, path);
472 if (access(libjava, F_OK) == 0) {
473 JLI_StrCat(path, "/jre");
474 JLI_TraceLauncher("JRE path is %s\n", path);
475 return JNI_TRUE;
476 }
477 }
478
479 /* try to find ourselves instead */
480 Dl_info selfInfo;
481 dladdr(&GetJREPath, &selfInfo);
482
483 #ifdef STATIC_BUILD
484 char jvm_cfg[MAXPATHLEN];
485 char *p = NULL;
486 strncpy(jvm_cfg, selfInfo.dli_fname, MAXPATHLEN);
487 p = strrchr(jvm_cfg, '/'); *p = '\0';
488 p = strrchr(jvm_cfg, '/');
489 if (strcmp(p, "/.") == 0) {
490 *p = '\0';
491 p = strrchr(jvm_cfg, '/'); *p = '\0';
492 }
493 else *p = '\0';
494 strncpy(path, jvm_cfg, pathsize);
495 strncat(jvm_cfg, "/lib/jvm.cfg", MAXPATHLEN);
496 if (access(jvm_cfg, F_OK) == 0) {
497 return JNI_TRUE;
498 }
499 #endif
500
501 char *realPathToSelf = realpath(selfInfo.dli_fname, path);
502 if (realPathToSelf != path) {
503 return JNI_FALSE;
504 }
505
506 size_t pathLen = strlen(realPathToSelf);
507 if (pathLen == 0) {
508 return JNI_FALSE;
509 }
510
511 const char lastPathComponent[] = "/lib/libjli.dylib";
512 size_t sizeOfLastPathComponent = sizeof(lastPathComponent) - 1;
513 if (pathLen < sizeOfLastPathComponent) {
514 return JNI_FALSE;
515 }
516
517 size_t indexOfLastPathComponent = pathLen - sizeOfLastPathComponent;
518 if (0 == strncmp(realPathToSelf + indexOfLastPathComponent, lastPathComponent, sizeOfLastPathComponent - 1)) {
519 realPathToSelf[indexOfLastPathComponent + 1] = '\0';
520 return JNI_TRUE;
521 }
522
523 if (!speculative)
524 JLI_ReportErrorMessage(JRE_ERROR8 JAVA_DLL);
525 return JNI_FALSE;
526 }
527
528 jboolean
529 LoadJavaVM(const char *jvmpath, InvocationFunctions *ifn)
530 {
531 Dl_info dlinfo;
532 void *libjvm;
533
534 JLI_TraceLauncher("JVM path is %s\n", jvmpath);
535
536 #ifndef STATIC_BUILD
537 libjvm = dlopen(jvmpath, RTLD_NOW + RTLD_GLOBAL);
538 #else
539 libjvm = dlopen(NULL, RTLD_FIRST);
540 #endif
541 if (libjvm == NULL) {
542 JLI_ReportErrorMessage(DLL_ERROR1, __LINE__);
543 JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror());
544 return JNI_FALSE;
545 }
546
547 ifn->CreateJavaVM = (CreateJavaVM_t)
548 dlsym(libjvm, "JNI_CreateJavaVM");
549 if (ifn->CreateJavaVM == NULL) {
550 JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror());
551 return JNI_FALSE;
552 }
553
554 ifn->GetDefaultJavaVMInitArgs = (GetDefaultJavaVMInitArgs_t)
555 dlsym(libjvm, "JNI_GetDefaultJavaVMInitArgs");
556 if (ifn->GetDefaultJavaVMInitArgs == NULL) {
557 JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror());
558 return JNI_FALSE;
559 }
560
561 ifn->GetCreatedJavaVMs = (GetCreatedJavaVMs_t)
562 dlsym(libjvm, "JNI_GetCreatedJavaVMs");
563 if (ifn->GetCreatedJavaVMs == NULL) {
564 JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror());
565 return JNI_FALSE;
566 }
567
568 return JNI_TRUE;
569 }
570
571 /*
572 * Compute the name of the executable
573 *
574 * In order to re-exec securely we need the absolute path of the
575 * executable. On Solaris getexecname(3c) may not return an absolute
576 * path so we use dladdr to get the filename of the executable and
577 * then use realpath to derive an absolute path. From Solaris 9
578 * onwards the filename returned in DL_info structure from dladdr is
579 * an absolute pathname so technically realpath isn't required.
580 * On Linux we read the executable name from /proc/self/exe.
581 * As a fallback, and for platforms other than Solaris and Linux,
582 * we use FindExecName to compute the executable name.
583 */
584 const char*
585 SetExecname(char **argv)
586 {
587 char* exec_path = NULL;
588 {
589 Dl_info dlinfo;
590
591 #ifdef STATIC_BUILD
592 void *fptr;
593 fptr = (void *)&SetExecname;
594 #else
595 int (*fptr)();
596 fptr = (int (*)())dlsym(RTLD_DEFAULT, "main");
597 #endif
598 if (fptr == NULL) {
599 JLI_ReportErrorMessage(DLL_ERROR3, dlerror());
600 return JNI_FALSE;
601 }
602
603 if (dladdr((void*)fptr, &dlinfo)) {
604 char *resolved = (char*)JLI_MemAlloc(PATH_MAX+1);
605 if (resolved != NULL) {
606 exec_path = realpath(dlinfo.dli_fname, resolved);
607 if (exec_path == NULL) {
608 JLI_MemFree(resolved);
609 }
610 }
611 }
612 }
613 if (exec_path == NULL) {
614 exec_path = FindExecName(argv[0]);
615 }
616 execname = exec_path;
617 return exec_path;
618 }
619
620 /*
621 * BSD's implementation of CounterGet()
622 */
623 int64_t
624 CounterGet()
625 {
626 struct timeval tv;
627 gettimeofday(&tv, NULL);
628 return (tv.tv_sec * 1000) + tv.tv_usec;
629 }
630
631
632 /* --- Splash Screen shared library support --- */
633
634 static JavaVM* SetJavaVMValue()
635 {
636 JavaVM * jvm = NULL;
637
638 // The handle is good for both the launcher and the libosxapp.dylib
639 void * handle = dlopen(NULL, RTLD_LAZY | RTLD_GLOBAL);
640 if (handle) {
641 typedef JavaVM* (*JLI_GetJavaVMInstance_t)();
642
643 JLI_GetJavaVMInstance_t JLI_GetJavaVMInstance =
644 (JLI_GetJavaVMInstance_t)dlsym(handle,
645 "JLI_GetJavaVMInstance");
646 if (JLI_GetJavaVMInstance) {
647 jvm = JLI_GetJavaVMInstance();
648 }
649
650 if (jvm) {
651 typedef void (*OSXAPP_SetJavaVM_t)(JavaVM*);
652
653 OSXAPP_SetJavaVM_t OSXAPP_SetJavaVM =
654 (OSXAPP_SetJavaVM_t)dlsym(handle, "OSXAPP_SetJavaVM");
655 if (OSXAPP_SetJavaVM) {
656 OSXAPP_SetJavaVM(jvm);
657 } else {
658 jvm = NULL;
659 }
660 }
661
662 dlclose(handle);
663 }
664
665 return jvm;
666 }
667
668 static const char* SPLASHSCREEN_SO = JNI_LIB_NAME("splashscreen");
669
670 static void* hSplashLib = NULL;
671
672 void* SplashProcAddress(const char* name) {
673 if (!hSplashLib) {
674 char jrePath[PATH_MAX];
675 if (!GetJREPath(jrePath, sizeof(jrePath), JNI_FALSE)) {
676 JLI_ReportErrorMessage(JRE_ERROR1);
677 return NULL;
678 }
679
680 char splashPath[PATH_MAX];
681 const int ret = JLI_Snprintf(splashPath, sizeof(splashPath),
682 "%s/lib/%s", jrePath, SPLASHSCREEN_SO);
683 if (ret >= (int)sizeof(splashPath)) {
684 JLI_ReportErrorMessage(JRE_ERROR11);
685 return NULL;
686 }
687 if (ret < 0) {
688 JLI_ReportErrorMessage(JRE_ERROR13);
689 return NULL;
690 }
691
692 hSplashLib = dlopen(splashPath, RTLD_LAZY | RTLD_GLOBAL);
693 // It's OK if dlopen() fails. The splash screen library binary file
694 // might have been stripped out from the JRE image to reduce its size
695 // (e.g. on embedded platforms).
696
697 if (hSplashLib) {
698 if (!SetJavaVMValue()) {
699 dlclose(hSplashLib);
700 hSplashLib = NULL;
701 }
702 }
703 }
704 if (hSplashLib) {
705 void* sym = dlsym(hSplashLib, name);
706 return sym;
707 } else {
708 return NULL;
709 }
710 }
711
712 void SplashFreeLibrary() {
713 if (hSplashLib) {
714 dlclose(hSplashLib);
715 hSplashLib = NULL;
716 }
717 }
718
719 /*
720 * Signature adapter for pthread_create().
721 */
722 static void* ThreadJavaMain(void* args) {
723 return (void*)(intptr_t)JavaMain(args);
724 }
725
726 /*
727 * Block current thread and continue execution in a new thread.
728 */
729 int
730 CallJavaMainInNewThread(jlong stack_size, void* args) {
731 int rslt;
732 pthread_t tid;
733 pthread_attr_t attr;
734 pthread_attr_init(&attr);
735 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
736
737 if (stack_size > 0) {
738 pthread_attr_setstacksize(&attr, stack_size);
739 }
740 pthread_attr_setguardsize(&attr, 0); // no pthread guard page on java threads
741
742 if (pthread_create(&tid, &attr, ThreadJavaMain, args) == 0) {
743 void* tmp;
744 pthread_join(tid, &tmp);
745 rslt = (int)(intptr_t)tmp;
746 } else {
747 /*
748 * Continue execution in current thread if for some reason (e.g. out of
749 * memory/LWP) a new thread can't be created. This will likely fail
750 * later in JavaMain as JNI_CreateJavaVM needs to create quite a
751 * few new threads, anyway, just give it a try..
752 */
753 rslt = JavaMain(args);
754 }
755
756 pthread_attr_destroy(&attr);
757 return rslt;
758 }
759
760 void SetJavaLauncherPlatformProps() {
761 /* Linux only */
762 }
763
764 static JavaVM* jvmInstance = NULL;
765 static jboolean sameThread = JNI_FALSE; /* start VM in current thread */
766
767 /*
768 * Note there is a callback on this function from the splashscreen logic,
769 * this as well SetJavaVMValue() needs to be simplified.
770 */
771 JNIEXPORT JavaVM* JNICALL
772 JLI_GetJavaVMInstance()
773 {
774 return jvmInstance;
775 }
776
777 void
778 RegisterThread()
779 {
780 // stubbed out for windows and *nixes.
781 }
782
783 static void
784 SetXDockArgForAWT(const char *arg)
785 {
786 char envVar[80];
787 if (strstr(arg, "-Xdock:name=") == arg) {
788 /*
789 * The APP_NAME_<pid> environment variable is used to pass
790 * an application name as specified with the -Xdock:name command
791 * line option from Java launcher code to the AWT code in order
792 * to assign this name to the app's dock tile on the Mac.
793 * The _<pid> part is added to avoid collisions with child processes.
794 *
795 * WARNING: This environment variable is an implementation detail and
796 * isn't meant for use outside of the core platform. The mechanism for
797 * passing this information from Java launcher to other modules may
798 * change drastically between update release, and it may even be
799 * removed or replaced with another mechanism.
800 *
801 * NOTE: It is used by SWT, and JavaFX.
802 */
803 snprintf(envVar, sizeof(envVar), "APP_NAME_%d", getpid());
804 setenv(envVar, (arg + 12), 1);
805 }
806
807 if (strstr(arg, "-Xdock:icon=") == arg) {
808 /*
809 * The APP_ICON_<pid> environment variable is used to pass
810 * an application icon as specified with the -Xdock:icon command
811 * line option from Java launcher code to the AWT code in order
812 * to assign this icon to the app's dock tile on the Mac.
813 * The _<pid> part is added to avoid collisions with child processes.
814 *
815 * WARNING: This environment variable is an implementation detail and
816 * isn't meant for use outside of the core platform. The mechanism for
817 * passing this information from Java launcher to other modules may
818 * change drastically between update release, and it may even be
819 * removed or replaced with another mechanism.
820 *
821 * NOTE: It is used by SWT, and JavaFX.
822 */
823 snprintf(envVar, sizeof(envVar), "APP_ICON_%d", getpid());
824 setenv(envVar, (arg + 12), 1);
825 }
826 }
827
828 static void
829 SetMainClassForAWT(JNIEnv *env, jclass mainClass) {
830 jclass classClass = NULL;
831 NULL_CHECK(classClass = FindBootStrapClass(env, "java/lang/Class"));
832
833 jmethodID getCanonicalNameMID = NULL;
834 NULL_CHECK(getCanonicalNameMID = (*env)->GetMethodID(env, classClass, "getCanonicalName", "()Ljava/lang/String;"));
835
836 jstring mainClassString = (*env)->CallObjectMethod(env, mainClass, getCanonicalNameMID);
837 if ((*env)->ExceptionCheck(env)) {
838 /*
839 * Clears all errors caused by getCanonicalName() on the mainclass and
840 * leaves the JAVA_MAIN_CLASS__<pid> empty.
841 */
842 (*env)->ExceptionClear(env);
843 return;
844 }
845
846 const char *mainClassName = NULL;
847 NULL_CHECK(mainClassName = (*env)->GetStringUTFChars(env, mainClassString, NULL));
848
849 char envVar[80];
850 /*
851 * The JAVA_MAIN_CLASS_<pid> environment variable is used to pass
852 * the name of a Java class whose main() method is invoked by
853 * the Java launcher code to start the application, to the AWT code
854 * in order to assign the name to the Apple menu bar when the app
855 * is active on the Mac.
856 * The _<pid> part is added to avoid collisions with child processes.
857 *
858 * WARNING: This environment variable is an implementation detail and
859 * isn't meant for use outside of the core platform. The mechanism for
860 * passing this information from Java launcher to other modules may
861 * change drastically between update release, and it may even be
862 * removed or replaced with another mechanism.
863 *
864 * NOTE: It is used by SWT, and JavaFX.
865 */
866 snprintf(envVar, sizeof(envVar), "JAVA_MAIN_CLASS_%d", getpid());
867 setenv(envVar, mainClassName, 1);
868
869 (*env)->ReleaseStringUTFChars(env, mainClassString, mainClassName);
870 }
871
872 void
873 SetXStartOnFirstThreadArg()
874 {
875 // XXX: BEGIN HACK
876 // short circuit hack for <https://bugs.eclipse.org/bugs/show_bug.cgi?id=211625>
877 // need a way to get AWT/Swing apps launched when spawned from Eclipse,
878 // which currently has no UI to not pass the -XstartOnFirstThread option
879 if (getenv("HACK_IGNORE_START_ON_FIRST_THREAD") != NULL) return;
880 // XXX: END HACK
881
882 sameThread = JNI_TRUE;
883 // Set a variable that tells us we started on the main thread.
884 // This is used by the AWT during startup. (See LWCToolkit.m)
885 char envVar[80];
886 snprintf(envVar, sizeof(envVar), "JAVA_STARTED_ON_FIRST_THREAD_%d", getpid());
887 setenv(envVar, "1", 1);
888 }
889
890 // MacOSX we may continue in the same thread
891 int
892 JVMInit(InvocationFunctions* ifn, jlong threadStackSize,
893 int argc, char **argv,
894 int mode, char *what, int ret) {
895 if (sameThread) {
896 JLI_TraceLauncher("In same thread\n");
897 // need to block this thread against the main thread
898 // so signals get caught correctly
899 __block int rslt = 0;
900 NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
901 {
902 NSBlockOperation *op = [NSBlockOperation blockOperationWithBlock: ^{
903 JavaMainArgs args;
904 args.argc = argc;
905 args.argv = argv;
906 args.mode = mode;
907 args.what = what;
908 args.ifn = *ifn;
909 rslt = JavaMain(&args);
910 }];
911
912 /*
913 * We cannot use dispatch_sync here, because it blocks the main dispatch queue.
914 * Using the main NSRunLoop allows the dispatch queue to run properly once
915 * SWT (or whatever toolkit this is needed for) kicks off it's own NSRunLoop
916 * and starts running.
917 */
918 [op performSelectorOnMainThread:@selector(start) withObject:nil waitUntilDone:YES];
919 }
920 [pool drain];
921 return rslt;
922 } else {
923 return ContinueInNewThread(ifn, threadStackSize, argc, argv, mode, what, ret);
924 }
925 }
926
927 /*
928 * Note the jvmInstance must be initialized first before entering into
929 * ShowSplashScreen, as there is a callback into the JLI_GetJavaVMInstance.
930 */
931 void PostJVMInit(JNIEnv *env, jclass mainClass, JavaVM *vm) {
932 jvmInstance = vm;
933 SetMainClassForAWT(env, mainClass);
934 CHECK_EXCEPTION_RETURN();
935 ShowSplashScreen();
936 }
937
938 jboolean
939 ProcessPlatformOption(const char* arg)
940 {
941 if (JLI_StrCmp(arg, "-XstartOnFirstThread") == 0) {
942 SetXStartOnFirstThreadArg();
943 return JNI_TRUE;
944 } else if (JLI_StrCCmp(arg, "-Xdock:") == 0) {
945 SetXDockArgForAWT(arg);
946 return JNI_TRUE;
947 }
948 // arguments we know not
949 return JNI_FALSE;
950 }