1 /*
2 * Copyright (c) 1998, 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 "manifest_info.h"
39
40
41 #define JVM_DLL "libjvm.so"
42 #define JAVA_DLL "libjava.so"
43 #ifdef AIX
44 #define LD_LIBRARY_PATH "LIBPATH"
45 #else
46 #define LD_LIBRARY_PATH "LD_LIBRARY_PATH"
47 #endif
48
49 /* help jettison the LD_LIBRARY_PATH settings in the future */
50 #ifndef SETENV_REQUIRED
51 #define SETENV_REQUIRED
52 #endif
53
54 #ifdef __solaris__
55 # include <sys/systeminfo.h>
56 # include <sys/elf.h>
57 # include <stdio.h>
58 #endif
59
60 /*
61 * Flowchart of launcher execs and options processing on unix
62 *
63 * The selection of the proper vm shared library to open depends on
64 * several classes of command line options, including vm "flavor"
65 * options (-client, -server).
66 * The vm selection options are not passed to the running
67 * virtual machine; they must be screened out by the launcher.
68 *
69 * The version specification (if any) is processed first by the
70 * platform independent routine SelectVersion. This may result in
71 * the exec of the specified launcher version.
72 *
73 * Previously the launcher modified the LD_LIBRARY_PATH appropriately for the
74 * desired data model path, regardless if data models matched or not. The
75 * launcher subsequently exec'ed the desired executable, in order to make the
76 * LD_LIBRARY_PATH path available, for the runtime linker.
77 *
78 * Now, in most cases,the launcher will dlopen the target libjvm.so. All
79 * required libraries are loaded by the runtime linker, using the
80 * $RPATH/$ORIGIN baked into the shared libraries at compile time. Therefore,
81 * in most cases, the launcher will only exec, if the data models are
82 * mismatched, and will not set any environment variables, regardless of the
83 * data models.
84 *
85 * However, if the environment contains a LD_LIBRARY_PATH, this will cause the
86 * launcher to inspect the LD_LIBRARY_PATH. The launcher will check
87 * a. if the LD_LIBRARY_PATH's first component is the path to the desired
88 * libjvm.so
89 * b. if any other libjvm.so is found in any of the paths.
90 * If case b is true, then the launcher will set the LD_LIBRARY_PATH to the
91 * desired JRE and reexec, in order to propagate the environment.
92 *
93 * Main
94 * (incoming argv)
95 * |
96 * \|/
97 * CreateExecutionEnvironment
98 * (determines desired data model)
99 * |
100 * |
101 * \|/
102 * Have Desired Model ? --> NO --> Exit(with error)
103 * |
104 * |
105 * \|/
106 * YES
107 * |
108 * |
109 * \|/
110 * CheckJvmType
111 * (removes -client, -server, etc.)
112 * |
113 * |
114 * \|/
115 * TranslateDashJArgs...
116 * (Prepare to pass args to vm)
117 * |
118 * |
119 * \|/
120 * ParseArguments
121 * |
122 * |
123 * \|/
124 * RequiresSetenv
125 * Is LD_LIBRARY_PATH
126 * and friends set ? --> NO --> Continue
127 * YES
128 * |
129 * |
130 * \|/
131 * Path is desired JRE ? YES --> Continue
132 * NO
133 * |
134 * |
135 * \|/
136 * Paths have well known
137 * jvm paths ? --> NO --> Error/Exit
138 * YES
139 * |
140 * |
141 * \|/
142 * Does libjvm.so exist
143 * in any of them ? --> NO --> Continue
144 * YES
145 * |
146 * |
147 * \|/
148 * Set the LD_LIBRARY_PATH
149 * |
150 * |
151 * \|/
152 * Re-exec
153 * |
154 * |
155 * \|/
156 * Main
157 */
158
159 /* Store the name of the executable once computed */
160 static char *execname = NULL;
161
162 /*
163 * execname accessor from other parts of platform dependent logic
164 */
165 const char *
166 GetExecName() {
167 return execname;
168 }
169
170 #ifdef SETENV_REQUIRED
171 static jboolean
172 JvmExists(const char *path) {
173 char tmp[PATH_MAX + 1];
174 struct stat statbuf;
175 JLI_Snprintf(tmp, PATH_MAX, "%s/%s", path, JVM_DLL);
176 if (stat(tmp, &statbuf) == 0) {
177 return JNI_TRUE;
178 }
179 return JNI_FALSE;
180 }
181 /*
182 * contains a lib/{server,client}/libjvm.so ?
183 */
184 static jboolean
185 ContainsLibJVM(const char *env) {
186 /* the usual suspects */
187 char clientPattern[] = "lib/client";
188 char serverPattern[] = "lib/server";
189 char *envpath;
190 char *path;
191 jboolean clientPatternFound;
192 jboolean serverPatternFound;
193
194 /* fastest path */
195 if (env == NULL) {
196 return JNI_FALSE;
197 }
198
199 /* to optimize for time, test if any of our usual suspects are present. */
200 clientPatternFound = JLI_StrStr(env, clientPattern) != NULL;
201 serverPatternFound = JLI_StrStr(env, serverPattern) != NULL;
202 if (clientPatternFound == JNI_FALSE && serverPatternFound == JNI_FALSE) {
203 return JNI_FALSE;
204 }
205
206 /*
207 * we have a suspicious path component, check if it contains a libjvm.so
208 */
209 envpath = JLI_StringDup(env);
210 for (path = JLI_StrTok(envpath, ":"); path != NULL; path = JLI_StrTok(NULL, ":")) {
211 if (clientPatternFound && JLI_StrStr(path, clientPattern) != NULL) {
212 if (JvmExists(path)) {
213 JLI_MemFree(envpath);
214 return JNI_TRUE;
215 }
216 }
217 if (serverPatternFound && JLI_StrStr(path, serverPattern) != NULL) {
218 if (JvmExists(path)) {
219 JLI_MemFree(envpath);
220 return JNI_TRUE;
221 }
222 }
223 }
224 JLI_MemFree(envpath);
225 return JNI_FALSE;
226 }
227
228 /*
229 * Test whether the environment variable needs to be set, see flowchart.
230 */
231 static jboolean
232 RequiresSetenv(const char *jvmpath) {
233 char jpath[PATH_MAX + 1];
234 char *llp;
235 char *dmllp = NULL;
236 char *p; /* a utility pointer */
237
238 #ifdef AIX
239 /* We always have to set the LIBPATH on AIX because ld doesn't support $ORIGIN. */
240 return JNI_TRUE;
241 #endif
242
243 llp = getenv("LD_LIBRARY_PATH");
244 #ifdef __solaris__
245 dmllp = getenv("LD_LIBRARY_PATH_64");
246 #endif /* __solaris__ */
247 /* no environment variable is a good environment variable */
248 if (llp == NULL && dmllp == NULL) {
249 return JNI_FALSE;
250 }
251 #ifdef __linux
252 /*
253 * On linux, if a binary is running as sgid or suid, glibc sets
254 * LD_LIBRARY_PATH to the empty string for security purposes. (In contrast,
255 * on Solaris the LD_LIBRARY_PATH variable for a privileged binary does not
256 * lose its settings; but the dynamic linker does apply more scrutiny to the
257 * path.) The launcher uses the value of LD_LIBRARY_PATH to prevent an exec
258 * loop, here and further downstream. Therefore, if we are running sgid or
259 * suid, this function's setting of LD_LIBRARY_PATH will be ineffective and
260 * we should case a return from the calling function. Getting the right
261 * libraries will be handled by the RPATH. In reality, this check is
262 * redundant, as the previous check for a non-null LD_LIBRARY_PATH will
263 * return back to the calling function forthwith, it is left here to safe
264 * guard against any changes, in the glibc's existing security policy.
265 */
266 if ((getgid() != getegid()) || (getuid() != geteuid())) {
267 return JNI_FALSE;
268 }
269 #endif /* __linux */
270
271 /*
272 * Prevent recursions. Since LD_LIBRARY_PATH is the one which will be set by
273 * previous versions of the JRE, thus it is the only path that matters here.
274 * So we check to see if the desired JRE is set.
275 */
276 JLI_StrNCpy(jpath, jvmpath, PATH_MAX);
277 p = JLI_StrRChr(jpath, '/');
278 *p = '\0';
279 if (llp != NULL && JLI_StrNCmp(llp, jpath, JLI_StrLen(jpath)) == 0) {
280 return JNI_FALSE;
281 }
282
283 /* scrutinize all the paths further */
284 if (llp != NULL && ContainsLibJVM(llp)) {
285 return JNI_TRUE;
286 }
287 if (dmllp != NULL && ContainsLibJVM(dmllp)) {
288 return JNI_TRUE;
289 }
290 return JNI_FALSE;
291 }
292 #endif /* SETENV_REQUIRED */
293
294 void
295 CreateExecutionEnvironment(int *pargc, char ***pargv,
296 char jrepath[], jint so_jrepath,
297 char jvmpath[], jint so_jvmpath,
298 char jvmcfg[], jint so_jvmcfg) {
299
300 char * jvmtype = NULL;
301 int argc = *pargc;
302 char **argv = *pargv;
303
304 #ifdef SETENV_REQUIRED
305 jboolean mustsetenv = JNI_FALSE;
306 char *runpath = NULL; /* existing effective LD_LIBRARY_PATH setting */
307 char* new_runpath = NULL; /* desired new LD_LIBRARY_PATH string */
308 char* newpath = NULL; /* path on new LD_LIBRARY_PATH */
309 char* lastslash = NULL;
310 char** newenvp = NULL; /* current environment */
311 size_t new_runpath_size;
312 #endif /* SETENV_REQUIRED */
313
314 /* Compute/set the name of the executable */
315 SetExecname(*pargv);
316
317 /* Check to see if the jvmpath exists */
318 /* Find out where the JRE is that we will be using. */
319 if (!GetJREPath(jrepath, so_jrepath, JNI_FALSE)) {
320 JLI_ReportErrorMessage(JRE_ERROR1);
321 exit(2);
322 }
323 JLI_Snprintf(jvmcfg, so_jvmcfg, "%s%slib%sjvm.cfg",
324 jrepath, FILESEP, FILESEP);
325 /* Find the specified JVM type */
326 if (ReadKnownVMs(jvmcfg, JNI_FALSE) < 1) {
327 JLI_ReportErrorMessage(CFG_ERROR7);
328 exit(1);
329 }
330
331 jvmpath[0] = '\0';
332 jvmtype = CheckJvmType(pargc, pargv, JNI_FALSE);
333 if (JLI_StrCmp(jvmtype, "ERROR") == 0) {
334 JLI_ReportErrorMessage(CFG_ERROR9);
335 exit(4);
336 }
337
338 if (!GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath)) {
339 JLI_ReportErrorMessage(CFG_ERROR8, jvmtype, jvmpath);
340 exit(4);
341 }
342 /*
343 * we seem to have everything we need, so without further ado
344 * we return back, otherwise proceed to set the environment.
345 */
346 #ifdef SETENV_REQUIRED
347 mustsetenv = RequiresSetenv(jvmpath);
348 JLI_TraceLauncher("mustsetenv: %s\n", mustsetenv ? "TRUE" : "FALSE");
349
350 if (mustsetenv == JNI_FALSE) {
351 return;
352 }
353 #else
354 return;
355 #endif /* SETENV_REQUIRED */
356
357 #ifdef SETENV_REQUIRED
358 if (mustsetenv) {
359 /*
360 * We will set the LD_LIBRARY_PATH as follows:
361 *
362 * o $JVMPATH (directory portion only)
363 * o $JRE/lib
364 * o $JRE/../lib
365 *
366 * followed by the user's previous effective LD_LIBRARY_PATH, if
367 * any.
368 */
369
370 runpath = getenv(LD_LIBRARY_PATH);
371
372 /* runpath contains current effective LD_LIBRARY_PATH setting */
373 { /* New scope to declare local variable */
374 char *new_jvmpath = JLI_StringDup(jvmpath);
375 new_runpath_size = ((runpath != NULL) ? JLI_StrLen(runpath) : 0) +
376 2 * JLI_StrLen(jrepath) +
377 JLI_StrLen(new_jvmpath) + 52;
378 new_runpath = JLI_MemAlloc(new_runpath_size);
379 newpath = new_runpath + JLI_StrLen(LD_LIBRARY_PATH "=");
380
381
382 /*
383 * Create desired LD_LIBRARY_PATH value for target data model.
384 */
385 {
386 /* remove the name of the .so from the JVM path */
387 lastslash = JLI_StrRChr(new_jvmpath, '/');
388 if (lastslash)
389 *lastslash = '\0';
390
391 sprintf(new_runpath, LD_LIBRARY_PATH "="
392 "%s:"
393 "%s/lib:"
394 "%s/../lib",
395 new_jvmpath,
396 jrepath,
397 jrepath
398 );
399
400 JLI_MemFree(new_jvmpath);
401
402 /*
403 * Check to make sure that the prefix of the current path is the
404 * desired environment variable setting, though the RequiresSetenv
405 * checks if the desired runpath exists, this logic does a more
406 * comprehensive check.
407 */
408 if (runpath != NULL &&
409 JLI_StrNCmp(newpath, runpath, JLI_StrLen(newpath)) == 0 &&
410 (runpath[JLI_StrLen(newpath)] == 0 ||
411 runpath[JLI_StrLen(newpath)] == ':')) {
412 JLI_MemFree(new_runpath);
413 return;
414 }
415 }
416 }
417
418 /*
419 * Place the desired environment setting onto the prefix of
420 * LD_LIBRARY_PATH. Note that this prevents any possible infinite
421 * loop of execv() because we test for the prefix, above.
422 */
423 if (runpath != 0) {
424 /* ensure storage for runpath + colon + NULL */
425 if ((JLI_StrLen(runpath) + 1 + 1) > new_runpath_size) {
426 JLI_ReportErrorMessageSys(JRE_ERROR11);
427 exit(1);
428 }
429 JLI_StrCat(new_runpath, ":");
430 JLI_StrCat(new_runpath, runpath);
431 }
432
433 if (putenv(new_runpath) != 0) {
434 /* problem allocating memory; LD_LIBRARY_PATH not set properly */
435 exit(1);
436 }
437
438 /*
439 * Unix systems document that they look at LD_LIBRARY_PATH only
440 * once at startup, so we have to re-exec the current executable
441 * to get the changed environment variable to have an effect.
442 */
443
444 newenvp = environ;
445 }
446 #endif /* SETENV_REQUIRED */
447 {
448 char *newexec = execname;
449 JLI_TraceLauncher("TRACER_MARKER:About to EXEC\n");
450 (void) fflush(stdout);
451 (void) fflush(stderr);
452 #ifdef SETENV_REQUIRED
453 if (mustsetenv) {
454 execve(newexec, argv, newenvp);
455 } else {
456 execv(newexec, argv);
457 }
458 #else /* !SETENV_REQUIRED */
459 execv(newexec, argv);
460 #endif /* SETENV_REQUIRED */
461 JLI_ReportErrorMessageSys(JRE_ERROR4, newexec);
462 }
463 exit(1);
464 }
465
466
467 static jboolean
468 GetJVMPath(const char *jrepath, const char *jvmtype,
469 char *jvmpath, jint jvmpathsize)
470 {
471 struct stat s;
472
473 if (JLI_StrChr(jvmtype, '/')) {
474 JLI_Snprintf(jvmpath, jvmpathsize, "%s/" JVM_DLL, jvmtype);
475 } else {
476 JLI_Snprintf(jvmpath, jvmpathsize, "%s/lib/%s/" JVM_DLL, jrepath, jvmtype);
477 }
478
479 JLI_TraceLauncher("Does `%s' exist ... ", jvmpath);
480
481 if (stat(jvmpath, &s) == 0) {
482 JLI_TraceLauncher("yes.\n");
483 return JNI_TRUE;
484 } else {
485 JLI_TraceLauncher("no.\n");
486 return JNI_FALSE;
487 }
488 }
489
490 /*
491 * Find path to JRE based on .exe's location or registry settings.
492 */
493 static jboolean
494 GetJREPath(char *path, jint pathsize, jboolean speculative)
495 {
496 char libjava[MAXPATHLEN];
497 struct stat s;
498
499 if (GetApplicationHome(path, pathsize)) {
500 /* Is JRE co-located with the application? */
501 JLI_Snprintf(libjava, sizeof(libjava), "%s/lib/" JAVA_DLL, path);
502 if (access(libjava, F_OK) == 0) {
503 JLI_TraceLauncher("JRE path is %s\n", path);
504 return JNI_TRUE;
505 }
506 /* ensure storage for path + /jre + NULL */
507 if ((JLI_StrLen(path) + 4 + 1) > (size_t) pathsize) {
508 JLI_TraceLauncher("Insufficient space to store JRE path\n");
509 return JNI_FALSE;
510 }
511 /* Does the app ship a private JRE in <apphome>/jre directory? */
512 JLI_Snprintf(libjava, sizeof(libjava), "%s/jre/lib/" JAVA_DLL, path);
513 if (access(libjava, F_OK) == 0) {
514 JLI_StrCat(path, "/jre");
515 JLI_TraceLauncher("JRE path is %s\n", path);
516 return JNI_TRUE;
517 }
518 }
519
520 if (GetApplicationHomeFromDll(path, pathsize)) {
521 JLI_Snprintf(libjava, sizeof(libjava), "%s/lib/" JAVA_DLL, path);
522 if (stat(libjava, &s) == 0) {
523 JLI_TraceLauncher("JRE path is %s\n", path);
524 return JNI_TRUE;
525 }
526 }
527
528 if (!speculative)
529 JLI_ReportErrorMessage(JRE_ERROR8 JAVA_DLL);
530 return JNI_FALSE;
531 }
532
533 jboolean
534 LoadJavaVM(const char *jvmpath, InvocationFunctions *ifn)
535 {
536 void *libjvm;
537
538 JLI_TraceLauncher("JVM path is %s\n", jvmpath);
539
540 libjvm = dlopen(jvmpath, RTLD_NOW + RTLD_GLOBAL);
541 if (libjvm == NULL) {
542 #if defined(__solaris__) && defined(__sparc) && !defined(_LP64) /* i.e. 32-bit sparc */
543 FILE * fp;
544 Elf32_Ehdr elf_head;
545 int count;
546 int location;
547
548 fp = fopen(jvmpath, "r");
549 if (fp == NULL) {
550 JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror());
551 return JNI_FALSE;
552 }
553
554 /* read in elf header */
555 count = fread((void*)(&elf_head), sizeof(Elf32_Ehdr), 1, fp);
556 fclose(fp);
557 if (count < 1) {
558 JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror());
559 return JNI_FALSE;
560 }
561
562 /*
563 * Check for running a server vm (compiled with -xarch=v8plus)
564 * on a stock v8 processor. In this case, the machine type in
565 * the elf header would not be included the architecture list
566 * provided by the isalist command, which is turn is gotten from
567 * sysinfo. This case cannot occur on 64-bit hardware and thus
568 * does not have to be checked for in binaries with an LP64 data
569 * model.
570 */
571 if (elf_head.e_machine == EM_SPARC32PLUS) {
572 char buf[257]; /* recommended buffer size from sysinfo man
573 page */
574 long length;
575 char* location;
576
577 length = sysinfo(SI_ISALIST, buf, 257);
578 if (length > 0) {
579 location = JLI_StrStr(buf, "sparcv8plus ");
580 if (location == NULL) {
581 JLI_ReportErrorMessage(JVM_ERROR3);
582 return JNI_FALSE;
583 }
584 }
585 }
586 #endif
587 JLI_ReportErrorMessage(DLL_ERROR1, __LINE__);
588 JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror());
589 return JNI_FALSE;
590 }
591
592 ifn->CreateJavaVM = (CreateJavaVM_t)
593 dlsym(libjvm, "JNI_CreateJavaVM");
594 if (ifn->CreateJavaVM == NULL) {
595 JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror());
596 return JNI_FALSE;
597 }
598
599 ifn->GetDefaultJavaVMInitArgs = (GetDefaultJavaVMInitArgs_t)
600 dlsym(libjvm, "JNI_GetDefaultJavaVMInitArgs");
601 if (ifn->GetDefaultJavaVMInitArgs == NULL) {
602 JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror());
603 return JNI_FALSE;
604 }
605
606 ifn->GetCreatedJavaVMs = (GetCreatedJavaVMs_t)
607 dlsym(libjvm, "JNI_GetCreatedJavaVMs");
608 if (ifn->GetCreatedJavaVMs == NULL) {
609 JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror());
610 return JNI_FALSE;
611 }
612
613 return JNI_TRUE;
614 }
615
616 /*
617 * Compute the name of the executable
618 *
619 * In order to re-exec securely we need the absolute path of the
620 * executable. On Solaris getexecname(3c) may not return an absolute
621 * path so we use dladdr to get the filename of the executable and
622 * then use realpath to derive an absolute path. From Solaris 9
623 * onwards the filename returned in DL_info structure from dladdr is
624 * an absolute pathname so technically realpath isn't required.
625 * On Linux we read the executable name from /proc/self/exe.
626 * As a fallback, and for platforms other than Solaris and Linux,
627 * we use FindExecName to compute the executable name.
628 */
629 const char*
630 SetExecname(char **argv)
631 {
632 char* exec_path = NULL;
633 #if defined(__solaris__)
634 {
635 Dl_info dlinfo;
636 int (*fptr)();
637
638 fptr = (int (*)())dlsym(RTLD_DEFAULT, "main");
639 if (fptr == NULL) {
640 JLI_ReportErrorMessage(DLL_ERROR3, dlerror());
641 return JNI_FALSE;
642 }
643
644 if (dladdr((void*)fptr, &dlinfo)) {
645 char *resolved = (char*)JLI_MemAlloc(PATH_MAX+1);
646 if (resolved != NULL) {
647 exec_path = realpath(dlinfo.dli_fname, resolved);
648 if (exec_path == NULL) {
649 JLI_MemFree(resolved);
650 }
651 }
652 }
653 }
654 #elif defined(__linux__)
655 {
656 const char* self = "/proc/self/exe";
657 char buf[PATH_MAX+1];
658 int len = readlink(self, buf, PATH_MAX);
659 if (len >= 0) {
660 buf[len] = '\0'; /* readlink(2) doesn't NUL terminate */
661 exec_path = JLI_StringDup(buf);
662 }
663 }
664 #else /* !__solaris__ && !__linux__ */
665 {
666 /* Not implemented */
667 }
668 #endif
669
670 if (exec_path == NULL) {
671 exec_path = FindExecName(argv[0]);
672 }
673 execname = exec_path;
674 return exec_path;
675 }
676
677 /* --- Splash Screen shared library support --- */
678 static const char* SPLASHSCREEN_SO = JNI_LIB_NAME("splashscreen");
679 static void* hSplashLib = NULL;
680
681 void* SplashProcAddress(const char* name) {
682 if (!hSplashLib) {
683 int ret;
684 char jrePath[MAXPATHLEN];
685 char splashPath[MAXPATHLEN];
686
687 if (!GetJREPath(jrePath, sizeof(jrePath), JNI_FALSE)) {
688 JLI_ReportErrorMessage(JRE_ERROR1);
689 return NULL;
690 }
691 ret = JLI_Snprintf(splashPath, sizeof(splashPath), "%s/lib/%s",
692 jrePath, SPLASHSCREEN_SO);
693
694 if (ret >= (int) sizeof(splashPath)) {
695 JLI_ReportErrorMessage(JRE_ERROR11);
696 return NULL;
697 }
698 if (ret < 0) {
699 JLI_ReportErrorMessage(JRE_ERROR13);
700 return NULL;
701 }
702 hSplashLib = dlopen(splashPath, RTLD_LAZY | RTLD_GLOBAL);
703 JLI_TraceLauncher("Info: loaded %s\n", splashPath);
704 }
705 if (hSplashLib) {
706 void* sym = dlsym(hSplashLib, name);
707 return sym;
708 } else {
709 return NULL;
710 }
711 }
712
713 void SplashFreeLibrary() {
714 if (hSplashLib) {
715 dlclose(hSplashLib);
716 hSplashLib = NULL;
717 }
718 }
719
720 /*
721 * Block current thread and continue execution in a new thread
722 */
723 int
724 ContinueInNewThread0(int (JNICALL *continuation)(void *), jlong stack_size, void * args) {
725 int rslt;
726 #ifndef __solaris__
727 pthread_t tid;
728 pthread_attr_t attr;
729 pthread_attr_init(&attr);
730 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
731
732 if (stack_size > 0) {
733 pthread_attr_setstacksize(&attr, stack_size);
734 }
735 pthread_attr_setguardsize(&attr, 0); // no pthread guard page on java threads
736
737 if (pthread_create(&tid, &attr, (void *(*)(void*))continuation, (void*)args) == 0) {
738 void * tmp;
739 pthread_join(tid, &tmp);
740 rslt = (int)(intptr_t)tmp;
741 } else {
742 /*
743 * Continue execution in current thread if for some reason (e.g. out of
744 * memory/LWP) a new thread can't be created. This will likely fail
745 * later in continuation as JNI_CreateJavaVM needs to create quite a
746 * few new threads, anyway, just give it a try..
747 */
748 rslt = continuation(args);
749 }
750
751 pthread_attr_destroy(&attr);
752 #else /* __solaris__ */
753 thread_t tid;
754 long flags = 0;
755 if (thr_create(NULL, stack_size, (void *(*)(void *))continuation, args, flags, &tid) == 0) {
756 void * tmp;
757 thr_join(tid, NULL, &tmp);
758 rslt = (int)(intptr_t)tmp;
759 } else {
760 /* See above. Continue in current thread if thr_create() failed */
761 rslt = continuation(args);
762 }
763 #endif /* !__solaris__ */
764 return rslt;
765 }
766
767 /* Coarse estimation of number of digits assuming the worst case is a 64-bit pid. */
768 #define MAX_PID_STR_SZ 20
769
770 void SetJavaLauncherPlatformProps() {
771 /* Linux only */
772 #ifdef __linux__
773 const char *substr = "-Dsun.java.launcher.pid=";
774 char *pid_prop_str = (char *)JLI_MemAlloc(JLI_StrLen(substr) + MAX_PID_STR_SZ + 1);
775 sprintf(pid_prop_str, "%s%d", substr, getpid());
776 AddOption(pid_prop_str, NULL);
777 #endif /* __linux__ */
778 }
779
780 int
781 JVMInit(InvocationFunctions* ifn, jlong threadStackSize,
782 int argc, char **argv,
783 int mode, char *what, int ret)
784 {
785 ShowSplashScreen();
786 return ContinueInNewThread(ifn, threadStackSize, argc, argv, mode, what, ret);
787 }
788
789 void
790 PostJVMInit(JNIEnv *env, jclass mainClass, JavaVM *vm)
791 {
792 // stubbed out for windows and *nixes.
793 }
794
795 void
796 RegisterThread()
797 {
798 // stubbed out for windows and *nixes.
799 }
800
801 /*
802 * on unix, we return a false to indicate this option is not applicable
803 */
804 jboolean
805 ProcessPlatformOption(const char *arg)
806 {
807 return JNI_FALSE;
808 }