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
615 /* Does the app ship a private JRE in <apphome>/jre directory? */
616 JLI_Snprintf(libjava, sizeof(libjava), "%s/jre/lib/" JAVA_DLL, path);
617 if (access(libjava, F_OK) == 0) {
618 JLI_StrCat(path, "/jre");
619 JLI_TraceLauncher("JRE path is %s\n", path);
620 return JNI_TRUE;
621 }
622 }
623
624 /* try to find ourselves instead */
625 Dl_info selfInfo;
626 dladdr(&GetJREPath, &selfInfo);
627
628 char *realPathToSelf = realpath(selfInfo.dli_fname, path);
629 if (realPathToSelf != path) {
630 return JNI_FALSE;
631 }
632
633 size_t pathLen = strlen(realPathToSelf);
634 if (pathLen == 0) {
635 return JNI_FALSE;
636 }
637
638 const char lastPathComponent[] = "/lib/jli/libjli.dylib";
639 size_t sizeOfLastPathComponent = sizeof(lastPathComponent) - 1;
640 if (pathLen < sizeOfLastPathComponent) {
641 return JNI_FALSE;
642 }
643
644 size_t indexOfLastPathComponent = pathLen - sizeOfLastPathComponent;
645 if (0 == strncmp(realPathToSelf + indexOfLastPathComponent, lastPathComponent, sizeOfLastPathComponent - 1)) {
646 realPathToSelf[indexOfLastPathComponent + 1] = '\0';
647 return JNI_TRUE;
648 }
649
650 if (!speculative)
651 JLI_ReportErrorMessage(JRE_ERROR8 JAVA_DLL);
652 return JNI_FALSE;
653 }
654
655 jboolean
656 LoadJavaVM(const char *jvmpath, InvocationFunctions *ifn)
657 {
658 Dl_info dlinfo;
659 void *libjvm;
660
661 JLI_TraceLauncher("JVM path is %s\n", jvmpath);
662
663 libjvm = dlopen(jvmpath, RTLD_NOW + RTLD_GLOBAL);
664 if (libjvm == NULL) {
665 JLI_ReportErrorMessage(DLL_ERROR1, __LINE__);
666 JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror());
667 return JNI_FALSE;
668 }
669
670 ifn->CreateJavaVM = (CreateJavaVM_t)
671 dlsym(libjvm, "JNI_CreateJavaVM");
672 if (ifn->CreateJavaVM == NULL) {
673 JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror());
674 return JNI_FALSE;
675 }
676
677 ifn->GetDefaultJavaVMInitArgs = (GetDefaultJavaVMInitArgs_t)
678 dlsym(libjvm, "JNI_GetDefaultJavaVMInitArgs");
679 if (ifn->GetDefaultJavaVMInitArgs == NULL) {
680 JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror());
681 return JNI_FALSE;
682 }
683
684 ifn->GetCreatedJavaVMs = (GetCreatedJavaVMs_t)
685 dlsym(libjvm, "JNI_GetCreatedJavaVMs");
686 if (ifn->GetCreatedJavaVMs == NULL) {
687 JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror());
688 return JNI_FALSE;
689 }
690
691 return JNI_TRUE;
692 }
693
694 /*
695 * Compute the name of the executable
696 *
697 * In order to re-exec securely we need the absolute path of the
698 * executable. On Solaris getexecname(3c) may not return an absolute
699 * path so we use dladdr to get the filename of the executable and
700 * then use realpath to derive an absolute path. From Solaris 9
701 * onwards the filename returned in DL_info structure from dladdr is
702 * an absolute pathname so technically realpath isn't required.
703 * On Linux we read the executable name from /proc/self/exe.
704 * As a fallback, and for platforms other than Solaris and Linux,
705 * we use FindExecName to compute the executable name.
706 */
707 const char*
708 SetExecname(char **argv)
709 {
710 char* exec_path = NULL;
711 {
712 Dl_info dlinfo;
713 int (*fptr)();
714
715 fptr = (int (*)())dlsym(RTLD_DEFAULT, "main");
716 if (fptr == NULL) {
717 JLI_ReportErrorMessage(DLL_ERROR3, dlerror());
718 return JNI_FALSE;
719 }
720
721 if (dladdr((void*)fptr, &dlinfo)) {
722 char *resolved = (char*)JLI_MemAlloc(PATH_MAX+1);
723 if (resolved != NULL) {
724 exec_path = realpath(dlinfo.dli_fname, resolved);
725 if (exec_path == NULL) {
726 JLI_MemFree(resolved);
727 }
728 }
729 }
730 }
731 if (exec_path == NULL) {
732 exec_path = FindExecName(argv[0]);
733 }
734 execname = exec_path;
735 return exec_path;
736 }
737
738 /*
739 * BSD's implementation of CounterGet()
740 */
741 int64_t
742 CounterGet()
743 {
744 struct timeval tv;
745 gettimeofday(&tv, NULL);
746 return (tv.tv_sec * 1000) + tv.tv_usec;
747 }
748
749
750 /* --- Splash Screen shared library support --- */
751
752 static JavaVM* SetJavaVMValue()
753 {
754 JavaVM * jvm = NULL;
755
756 // The handle is good for both the launcher and the libosxapp.dylib
757 void * handle = dlopen(NULL, RTLD_LAZY | RTLD_GLOBAL);
758 if (handle) {
759 typedef JavaVM* (*JLI_GetJavaVMInstance_t)();
760
761 JLI_GetJavaVMInstance_t JLI_GetJavaVMInstance =
762 (JLI_GetJavaVMInstance_t)dlsym(handle,
763 "JLI_GetJavaVMInstance");
764 if (JLI_GetJavaVMInstance) {
765 jvm = JLI_GetJavaVMInstance();
766 }
767
768 if (jvm) {
769 typedef void (*OSXAPP_SetJavaVM_t)(JavaVM*);
770
771 OSXAPP_SetJavaVM_t OSXAPP_SetJavaVM =
772 (OSXAPP_SetJavaVM_t)dlsym(handle, "OSXAPP_SetJavaVM");
773 if (OSXAPP_SetJavaVM) {
774 OSXAPP_SetJavaVM(jvm);
775 } else {
776 jvm = NULL;
777 }
778 }
779
780 dlclose(handle);
781 }
782
783 return jvm;
784 }
785
786 static const char* SPLASHSCREEN_SO = JNI_LIB_NAME("splashscreen");
787
788 static void* hSplashLib = NULL;
789
790 void* SplashProcAddress(const char* name) {
791 if (!hSplashLib) {
792 char jrePath[PATH_MAX];
793 if (!GetJREPath(jrePath, sizeof(jrePath), GetArch(), JNI_FALSE)) {
794 JLI_ReportErrorMessage(JRE_ERROR1);
795 return NULL;
796 }
797
798 char splashPath[PATH_MAX];
799 const int ret = JLI_Snprintf(splashPath, sizeof(splashPath),
800 "%s/lib/%s", jrePath, SPLASHSCREEN_SO);
801 if (ret >= (int)sizeof(splashPath)) {
802 JLI_ReportErrorMessage(JRE_ERROR11);
803 return NULL;
804 }
805 if (ret < 0) {
806 JLI_ReportErrorMessage(JRE_ERROR13);
807 return NULL;
808 }
809
810 hSplashLib = dlopen(splashPath, RTLD_LAZY | RTLD_GLOBAL);
811 // It's OK if dlopen() fails. The splash screen library binary file
812 // might have been stripped out from the JRE image to reduce its size
813 // (e.g. on embedded platforms).
814
815 if (hSplashLib) {
816 if (!SetJavaVMValue()) {
817 dlclose(hSplashLib);
818 hSplashLib = NULL;
819 }
820 }
821 }
822 if (hSplashLib) {
823 void* sym = dlsym(hSplashLib, name);
824 return sym;
825 } else {
826 return NULL;
827 }
828 }
829
830 void SplashFreeLibrary() {
831 if (hSplashLib) {
832 dlclose(hSplashLib);
833 hSplashLib = NULL;
834 }
835 }
836
837 /*
838 * Block current thread and continue execution in a new thread
839 */
840 int
841 ContinueInNewThread0(int (JNICALL *continuation)(void *), jlong stack_size, void * args) {
842 int rslt;
843 pthread_t tid;
844 pthread_attr_t attr;
845 pthread_attr_init(&attr);
846 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
847
848 if (stack_size > 0) {
849 pthread_attr_setstacksize(&attr, stack_size);
850 }
851
852 if (pthread_create(&tid, &attr, (void *(*)(void*))continuation, (void*)args) == 0) {
853 void * tmp;
854 pthread_join(tid, &tmp);
855 rslt = (int)(intptr_t)tmp;
856 } else {
857 /*
858 * Continue execution in current thread if for some reason (e.g. out of
859 * memory/LWP) a new thread can't be created. This will likely fail
860 * later in continuation as JNI_CreateJavaVM needs to create quite a
861 * few new threads, anyway, just give it a try..
862 */
863 rslt = continuation(args);
864 }
865
866 pthread_attr_destroy(&attr);
867 return rslt;
868 }
869
870 void SetJavaLauncherPlatformProps() {
871 /* Linux only */
872 }
873
874 jboolean
875 ServerClassMachine(void) {
876 return JNI_TRUE;
877 }
878
879 static JavaVM* jvmInstance = NULL;
880 static jboolean sameThread = JNI_FALSE; /* start VM in current thread */
881
882 /*
883 * Note there is a callback on this function from the splashscreen logic,
884 * this as well SetJavaVMValue() needs to be simplified.
885 */
886 JavaVM*
887 JLI_GetJavaVMInstance()
888 {
889 return jvmInstance;
890 }
891
892 void
893 RegisterThread()
894 {
895 objc_registerThreadWithCollector();
896 }
897
898 static void
899 SetXDockArgForAWT(const char *arg)
900 {
901 char envVar[80];
902 if (strstr(arg, "-Xdock:name=") == arg) {
903 /*
904 * The APP_NAME_<pid> environment variable is used to pass
905 * an application name as specified with the -Xdock:name command
906 * line option from Java launcher code to the AWT code in order
907 * to assign this name to the app's dock tile on the Mac.
908 * The _<pid> part is added to avoid collisions with child processes.
909 *
910 * WARNING: This environment variable is an implementation detail and
911 * isn't meant for use outside of the core platform. The mechanism for
912 * passing this information from Java launcher to other modules may
913 * change drastically between update release, and it may even be
914 * removed or replaced with another mechanism.
915 *
916 * NOTE: It is used by SWT, and JavaFX.
917 */
918 snprintf(envVar, sizeof(envVar), "APP_NAME_%d", getpid());
919 setenv(envVar, (arg + 12), 1);
920 }
921
922 if (strstr(arg, "-Xdock:icon=") == arg) {
923 /*
924 * The APP_ICON_<pid> environment variable is used to pass
925 * an application icon as specified with the -Xdock:icon command
926 * line option from Java launcher code to the AWT code in order
927 * to assign this icon to the app's dock tile on the Mac.
928 * The _<pid> part is added to avoid collisions with child processes.
929 *
930 * WARNING: This environment variable is an implementation detail and
931 * isn't meant for use outside of the core platform. The mechanism for
932 * passing this information from Java launcher to other modules may
933 * change drastically between update release, and it may even be
934 * removed or replaced with another mechanism.
935 *
936 * NOTE: It is used by SWT, and JavaFX.
937 */
938 snprintf(envVar, sizeof(envVar), "APP_ICON_%d", getpid());
939 setenv(envVar, (arg + 12), 1);
940 }
941 }
942
943 static void
944 SetMainClassForAWT(JNIEnv *env, jclass mainClass) {
945 jclass classClass = NULL;
946 NULL_CHECK(classClass = FindBootStrapClass(env, "java/lang/Class"));
947
948 jmethodID getCanonicalNameMID = NULL;
949 NULL_CHECK(getCanonicalNameMID = (*env)->GetMethodID(env, classClass, "getCanonicalName", "()Ljava/lang/String;"));
950
951 jstring mainClassString = NULL;
952 NULL_CHECK(mainClassString = (*env)->CallObjectMethod(env, mainClass, getCanonicalNameMID));
953
954 const char *mainClassName = NULL;
955 NULL_CHECK(mainClassName = (*env)->GetStringUTFChars(env, mainClassString, NULL));
956
957 char envVar[80];
958 /*
959 * The JAVA_MAIN_CLASS_<pid> environment variable is used to pass
960 * the name of a Java class whose main() method is invoked by
961 * the Java launcher code to start the application, to the AWT code
962 * in order to assign the name to the Apple menu bar when the app
963 * is active on the Mac.
964 * The _<pid> part is added to avoid collisions with child processes.
965 *
966 * WARNING: This environment variable is an implementation detail and
967 * isn't meant for use outside of the core platform. The mechanism for
968 * passing this information from Java launcher to other modules may
969 * change drastically between update release, and it may even be
970 * removed or replaced with another mechanism.
971 *
972 * NOTE: It is used by SWT, and JavaFX.
973 */
974 snprintf(envVar, sizeof(envVar), "JAVA_MAIN_CLASS_%d", getpid());
975 setenv(envVar, mainClassName, 1);
976
977 (*env)->ReleaseStringUTFChars(env, mainClassString, mainClassName);
978 }
979
980 void
981 SetXStartOnFirstThreadArg()
982 {
983 // XXX: BEGIN HACK
984 // short circuit hack for <https://bugs.eclipse.org/bugs/show_bug.cgi?id=211625>
985 // need a way to get AWT/Swing apps launched when spawned from Eclipse,
986 // which currently has no UI to not pass the -XstartOnFirstThread option
987 if (getenv("HACK_IGNORE_START_ON_FIRST_THREAD") != NULL) return;
988 // XXX: END HACK
989
990 sameThread = JNI_TRUE;
991 // Set a variable that tells us we started on the main thread.
992 // This is used by the AWT during startup. (See LWCToolkit.m)
993 char envVar[80];
994 snprintf(envVar, sizeof(envVar), "JAVA_STARTED_ON_FIRST_THREAD_%d", getpid());
995 setenv(envVar, "1", 1);
996 }
997
998 /* This class is made for performSelectorOnMainThread when java main
999 * should be launched on main thread.
1000 * We cannot use dispatch_sync here, because it blocks the main dispatch queue
1001 * which is used inside Cocoa
1002 */
1003 @interface JavaLaunchHelper : NSObject {
1004 int _returnValue;
1005 }
1006 - (void) launchJava:(NSValue*)argsValue;
1007 - (int) getReturnValue;
1008 @end
1009
1010 @implementation JavaLaunchHelper
1011
1012 - (void) launchJava:(NSValue*)argsValue
1013 {
1014 _returnValue = JavaMain([argsValue pointerValue]);
1015 }
1016
1017 - (int) getReturnValue
1018 {
1019 return _returnValue;
1020 }
1021
1022 @end
1023
1024 // MacOSX we may continue in the same thread
1025 int
1026 JVMInit(InvocationFunctions* ifn, jlong threadStackSize,
1027 int argc, char **argv,
1028 int mode, char *what, int ret) {
1029 if (sameThread) {
1030 JLI_TraceLauncher("In same thread\n");
1031 // need to block this thread against the main thread
1032 // so signals get caught correctly
1033 JavaMainArgs args;
1034 args.argc = argc;
1035 args.argv = argv;
1036 args.mode = mode;
1037 args.what = what;
1038 args.ifn = *ifn;
1039 int rslt;
1040 NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
1041 {
1042 JavaLaunchHelper* launcher = [[[JavaLaunchHelper alloc] init] autorelease];
1043 [launcher performSelectorOnMainThread:@selector(launchJava:)
1044 withObject:[NSValue valueWithPointer:(void*)&args]
1045 waitUntilDone:YES];
1046 rslt = [launcher getReturnValue];
1047 }
1048 [pool drain];
1049 return rslt;
1050 } else {
1051 return ContinueInNewThread(ifn, threadStackSize, argc, argv, mode, what, ret);
1052 }
1053 }
1054
1055 /*
1056 * Note the jvmInstance must be initialized first before entering into
1057 * ShowSplashScreen, as there is a callback into the JLI_GetJavaVMInstance.
1058 */
1059 void PostJVMInit(JNIEnv *env, jstring mainClass, JavaVM *vm) {
1060 jvmInstance = vm;
1061 SetMainClassForAWT(env, mainClass);
1062 CHECK_EXCEPTION_RETURN();
1063 ShowSplashScreen();
1064 }
1065
1066 jboolean
1067 ProcessPlatformOption(const char* arg)
1068 {
1069 if (JLI_StrCmp(arg, "-XstartOnFirstThread") == 0) {
1070 SetXStartOnFirstThreadArg();
1071 return JNI_TRUE;
1072 } else if (JLI_StrCCmp(arg, "-Xdock:") == 0) {
1073 SetXDockArgForAWT(arg);
1074 return JNI_TRUE;
1075 }
1076 // arguments we know not
1077 return JNI_FALSE;
1078 }