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