1 /*
2 * Copyright (c) 1999, 2010, 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.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25
26 #include "java.h"
27 #include <dirent.h>
28 #include <dlfcn.h>
29 #include <fcntl.h>
30 #include <inttypes.h>
31 #include <stdio.h>
32 #include <string.h>
33 #include <stdlib.h>
34 #include <limits.h>
35 #include <sys/stat.h>
36 #include <unistd.h>
37 #include <sys/types.h>
38
39 #ifndef GAMMA
40 #include "manifest_info.h"
41 #include "version_comp.h"
42 #endif
43
44 #if defined(__linux__) || defined(_ALLBSD_SOURCE)
45 #include <pthread.h>
46 #else
47 #include <thread.h>
48 #endif
49
50 #ifdef __APPLE__
51 #define JVM_DLL "libjvm.dylib"
52 #define JAVA_DLL "libjava.dylib"
53 #define LD_LIBRARY_PATH "DYLD_LIBRARY_PATH"
54 #else
55 #define JVM_DLL "libjvm.so"
56 #define JAVA_DLL "libjava.so"
57 #define LD_LIBRARY_PATH "LD_LIBRARY_PATH"
58 #endif
59
60 #ifndef GAMMA /* launcher.make defines ARCH */
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. When DUAL_MODE is
65 * defined, the architecture names for the narrow and wide version of
66 * the architecture are defined in LIBARCH64NAME and LIBARCH32NAME. Currently
67 * only Solaris on sparc/sparcv9 and i586/amd64 is DUAL_MODE; linux
68 * i586/amd64 could be defined as DUAL_MODE but that is not the
69 * current policy.
70 */
71
72 #ifndef LIBARCHNAME
73 # error "The macro LIBARCHNAME was not defined on the compile line"
74 #endif
75
76 #ifdef __sun
77 # define DUAL_MODE
78 # ifndef LIBARCH32NAME
79 # error "The macro LIBARCH32NAME was not defined on the compile line"
80 # endif
81 # ifndef LIBARCH64NAME
82 # error "The macro LIBARCH64NAME was not defined on the compile line"
83 # endif
84 # include <sys/systeminfo.h>
85 # include <sys/elf.h>
86 # include <stdio.h>
87 #endif
88
89 #endif /* ifndef GAMMA */
90
91 /* pointer to environment */
92 extern char **environ;
93
94 #ifndef GAMMA
95 /*
96 * A collection of useful strings. One should think of these as #define
97 * entries, but actual strings can be more efficient (with many compilers).
98 */
99 #ifdef __linux__
100 static const char *system_dir = "/usr/java";
101 static const char *user_dir = "/java";
102 #else /* Solaris */
103 static const char *system_dir = "/usr/jdk";
104 static const char *user_dir = "/jdk";
105 #endif
106
107 #endif /* ifndef GAMMA */
108
109 /*
110 * Flowchart of launcher execs and options processing on unix
111 *
112 * The selection of the proper vm shared library to open depends on
113 * several classes of command line options, including vm "flavor"
114 * options (-client, -server) and the data model options, -d32 and
115 * -d64, as well as a version specification which may have come from
116 * the command line or from the manifest of an executable jar file.
117 * The vm selection options are not passed to the running
118 * virtual machine; they must be screened out by the launcher.
119 *
120 * The version specification (if any) is processed first by the
121 * platform independent routine SelectVersion. This may result in
122 * the exec of the specified launcher version.
123 *
124 * Typically, the launcher execs at least once to ensure a suitable
125 * LD_LIBRARY_PATH is in effect for the process. The first exec
126 * screens out all the data model options; leaving the choice of data
127 * model implicit in the binary selected to run. However, in case no
128 * exec is done, the data model options are screened out before the vm
129 * is invoked.
130 *
131 * incoming argv ------------------------------
132 * | |
133 * \|/ |
134 * CheckJVMType |
135 * (removes -client, -server, etc.) |
136 * \|/
137 * CreateExecutionEnvironment
138 * (removes -d32 and -d64,
139 * determines desired data model,
140 * sets up LD_LIBRARY_PATH,
141 * and exec's)
142 * |
143 * --------------------------------------------
144 * |
145 * \|/
146 * exec child 1 incoming argv -----------------
147 * | |
148 * \|/ |
149 * CheckJVMType |
150 * (removes -client, -server, etc.) |
151 * | \|/
152 * | CreateExecutionEnvironment
153 * | (verifies desired data model
154 * | is running and acceptable
155 * | LD_LIBRARY_PATH;
156 * | no-op in child)
157 * |
158 * \|/
159 * TranslateDashJArgs...
160 * (Prepare to pass args to vm)
161 * |
162 * |
163 * |
164 * \|/
165 * ParseArguments
166 * (ignores -d32 and -d64,
167 * processes version options,
168 * creates argument list for vm,
169 * etc.)
170 *
171 */
172
173 static char *SetExecname(char **argv);
174 static char * GetExecname();
175 static jboolean GetJVMPath(const char *jrepath, const char *jvmtype,
176 char *jvmpath, jint jvmpathsize, char * arch);
177 static jboolean GetJREPath(char *path, jint pathsize, char * arch, jboolean speculative);
178
179 #ifndef GAMMA
180 const char *
181 GetArch()
182 {
183 return LIBARCHNAME;
184 }
185 #endif /* ifndef GAMMA */
186
187 void
188 CreateExecutionEnvironment(int *_argcp,
189 char ***_argvp,
190 char jrepath[],
191 jint so_jrepath,
192 char jvmpath[],
193 jint so_jvmpath,
194 char **original_argv) {
195 /*
196 * First, determine if we are running the desired data model. If we
197 * are running the desired data model, all the error messages
198 * associated with calling GetJREPath, ReadKnownVMs, etc. should be
199 * output. However, if we are not running the desired data model,
200 * some of the errors should be suppressed since it is more
201 * informative to issue an error message based on whether or not the
202 * os/processor combination has dual mode capabilities.
203 */
204
205 char *execname = NULL;
206 int original_argc = *_argcp;
207 jboolean jvmpathExists;
208
209 /* Compute the name of the executable */
210 execname = SetExecname(*_argvp);
211
212 #ifndef GAMMA
213 /* Set the LD_LIBRARY_PATH environment variable, check data model
214 flags, and exec process, if needed */
215 {
216 char *arch = (char *)GetArch(); /* like sparc or sparcv9 */
217 char * jvmtype = NULL;
218 int argc = *_argcp;
219 char **argv = original_argv;
220
221 char *runpath = NULL; /* existing effective LD_LIBRARY_PATH
222 setting */
223
224 int running = /* What data model is being ILP32 =>
225 32 bit vm; LP64 => 64 bit vm */
226 #ifdef _LP64
227 64;
228 #else
229 32;
230 #endif
231
232 int wanted = running; /* What data mode is being
233 asked for? Current model is
234 fine unless another model
235 is asked for */
236
237 char* new_runpath = NULL; /* desired new LD_LIBRARY_PATH string */
238 char* newpath = NULL; /* path on new LD_LIBRARY_PATH */
239 char* lastslash = NULL;
240
241 char** newenvp = NULL; /* current environment */
242
243 char** newargv = NULL;
244 int newargc = 0;
245 #ifdef __sun
246 char* dmpath = NULL; /* data model specific LD_LIBRARY_PATH,
247 Solaris only */
248 #endif
249
250 /*
251 * Starting in 1.5, all unix platforms accept the -d32 and -d64
252 * options. On platforms where only one data-model is supported
253 * (e.g. ia-64 Linux), using the flag for the other data model is
254 * an error and will terminate the program.
255 */
256
257 { /* open new scope to declare local variables */
258 int i;
259
260 newargv = (char **)JLI_MemAlloc((argc+1) * sizeof(*newargv));
261 newargv[newargc++] = argv[0];
262
263 /* scan for data model arguments and remove from argument list;
264 last occurrence determines desired data model */
265 for (i=1; i < argc; i++) {
266
267 if (strcmp(argv[i], "-J-d64") == 0 || strcmp(argv[i], "-d64") == 0) {
268 wanted = 64;
269 continue;
270 }
271 if (strcmp(argv[i], "-J-d32") == 0 || strcmp(argv[i], "-d32") == 0) {
272 wanted = 32;
273 continue;
274 }
275 newargv[newargc++] = argv[i];
276
277 #ifdef JAVA_ARGS
278 if (argv[i][0] != '-')
279 continue;
280 #else
281 if (strcmp(argv[i], "-classpath") == 0 || strcmp(argv[i], "-cp") == 0) {
282 i++;
283 if (i >= argc) break;
284 newargv[newargc++] = argv[i];
285 continue;
286 }
287 if (argv[i][0] != '-') { i++; break; }
288 #endif
289 }
290
291 /* copy rest of args [i .. argc) */
292 while (i < argc) {
293 newargv[newargc++] = argv[i++];
294 }
295 newargv[newargc] = NULL;
296
297 /*
298 * newargv has all proper arguments here
299 */
300
301 argc = newargc;
302 argv = newargv;
303 }
304
305 /* If the data model is not changing, it is an error if the
306 jvmpath does not exist */
307 if (wanted == running) {
308 /* Find out where the JRE is that we will be using. */
309 if (!GetJREPath(jrepath, so_jrepath, arch, JNI_FALSE) ) {
310 fprintf(stderr, "Error: could not find Java 2 Runtime Environment.\n");
311 exit(2);
312 }
313
314 /* Find the specified JVM type */
315 if (ReadKnownVMs(jrepath, arch, JNI_FALSE) < 1) {
316 fprintf(stderr, "Error: no known VMs. (check for corrupt jvm.cfg file)\n");
317 exit(1);
318 }
319
320 jvmpath[0] = '\0';
321 jvmtype = CheckJvmType(_argcp, _argvp, JNI_FALSE);
322
323 if (!GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath, arch )) {
324 fprintf(stderr, "Error: no `%s' JVM at `%s'.\n", jvmtype, jvmpath);
325 exit(4);
326 }
327 } else { /* do the same speculatively or exit */
328 #ifdef DUAL_MODE
329 if (running != wanted) {
330 /* Find out where the JRE is that we will be using. */
331 if (!GetJREPath(jrepath, so_jrepath, ((wanted==64)?LIBARCH64NAME:LIBARCH32NAME), JNI_TRUE)) {
332 goto EndDataModelSpeculate;
333 }
334
335 /*
336 * Read in jvm.cfg for target data model and process vm
337 * selection options.
338 */
339 if (ReadKnownVMs(jrepath, ((wanted==64)?LIBARCH64NAME:LIBARCH32NAME), JNI_TRUE) < 1) {
340 goto EndDataModelSpeculate;
341 }
342 jvmpath[0] = '\0';
343 jvmtype = CheckJvmType(_argcp, _argvp, JNI_TRUE);
344 /* exec child can do error checking on the existence of the path */
345 jvmpathExists = GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath,
346 ((wanted==64)?LIBARCH64NAME:LIBARCH32NAME));
347
348 }
349 EndDataModelSpeculate: /* give up and let other code report error message */
350 ;
351 #else
352 fprintf(stderr, "Running a %d-bit JVM is not supported on this platform.\n", wanted);
353 exit(1);
354 #endif
355 }
356
357 /*
358 * We will set the LD_LIBRARY_PATH as follows:
359 *
360 * o $JVMPATH (directory portion only)
361 * o $JRE/lib/$LIBARCHNAME
362 * o $JRE/../lib/$LIBARCHNAME
363 *
364 * followed by the user's previous effective LD_LIBRARY_PATH, if
365 * any.
366 */
367
368 #ifdef __sun
369 /*
370 * Starting in Solaris 7, ld.so.1 supports three LD_LIBRARY_PATH
371 * variables:
372 *
373 * 1. LD_LIBRARY_PATH -- used for 32 and 64 bit searches if
374 * data-model specific variables are not set.
375 *
376 * 2. LD_LIBRARY_PATH_64 -- overrides and replaces LD_LIBRARY_PATH
377 * for 64-bit binaries.
378 *
379 * 3. LD_LIBRARY_PATH_32 -- overrides and replaces LD_LIBRARY_PATH
380 * for 32-bit binaries.
381 *
382 * The vm uses LD_LIBRARY_PATH to set the java.library.path system
383 * property. To shield the vm from the complication of multiple
384 * LD_LIBRARY_PATH variables, if the appropriate data model
385 * specific variable is set, we will act as if LD_LIBRARY_PATH had
386 * the value of the data model specific variant and the data model
387 * specific variant will be unset. Note that the variable for the
388 * *wanted* data model must be used (if it is set), not simply the
389 * current running data model.
390 */
391
392 switch(wanted) {
393 case 0:
394 if(running == 32) {
395 dmpath = getenv("LD_LIBRARY_PATH_32");
396 wanted = 32;
397 }
398 else {
399 dmpath = getenv("LD_LIBRARY_PATH_64");
400 wanted = 64;
401 }
402 break;
403
404 case 32:
405 dmpath = getenv("LD_LIBRARY_PATH_32");
406 break;
407
408 case 64:
409 dmpath = getenv("LD_LIBRARY_PATH_64");
410 break;
411
412 default:
413 fprintf(stderr, "Improper value at line %d.", __LINE__);
414 exit(1); /* unknown value in wanted */
415 break;
416 }
417
418 /*
419 * If dmpath is NULL, the relevant data model specific variable is
420 * not set and normal LD_LIBRARY_PATH should be used.
421 */
422 if( dmpath == NULL) {
423 runpath = getenv("LD_LIBRARY_PATH");
424 }
425 else {
426 runpath = dmpath;
427 }
428 #else
429 /*
430 * If not on Solaris, assume only a single LD_LIBRARY_PATH
431 * variable.
432 */
433 runpath = getenv(LD_LIBRARY_PATH);
434 #endif /* __sun */
435
436 #if defined(__linux__)
437 /*
438 * On linux, if a binary is running as sgid or suid, glibc sets
439 * LD_LIBRARY_PATH to the empty string for security purposes. (In
440 * contrast, on Solaris the LD_LIBRARY_PATH variable for a
441 * privileged binary does not lose its settings; but the dynamic
442 * linker does apply more scrutiny to the path.) The launcher uses
443 * the value of LD_LIBRARY_PATH to prevent an exec loop.
444 * Therefore, if we are running sgid or suid, this function's
445 * setting of LD_LIBRARY_PATH will be ineffective and we should
446 * return from the function now. Getting the right libraries to
447 * be found must be handled through other mechanisms.
448 */
449 if((getgid() != getegid()) || (getuid() != geteuid()) ) {
450 return;
451 }
452 #elif defined(_ALLBSD_SOURCE)
453 /*
454 * On BSD, if a binary is running as sgid or suid, libc sets
455 * LD_LIBRARY_PATH to the empty string for security purposes. (In
456 * contrast, on Solaris the LD_LIBRARY_PATH variable for a
457 * privileged binary does not lose its settings; but the dynamic
458 * linker does apply more scrutiny to the path.) The launcher uses
459 * the value of LD_LIBRARY_PATH to prevent an exec loop.
460 * Therefore, if we are running sgid or suid, this function's
461 * setting of LD_LIBRARY_PATH will be ineffective and we should
462 * return from the function now. Getting the right libraries to
463 * be found must be handled through other mechanisms.
464 */
465 if(issetugid()) {
466 return;
467 }
468 #endif
469
470 /* runpath contains current effective LD_LIBRARY_PATH setting */
471
472 jvmpath = JLI_StringDup(jvmpath);
473 new_runpath = JLI_MemAlloc( ((runpath!=NULL)?strlen(runpath):0) +
474 2*strlen(jrepath) + 2*strlen(arch) +
475 strlen(jvmpath) + 52);
476 newpath = new_runpath + strlen(LD_LIBRARY_PATH "=");
477
478
479 /*
480 * Create desired LD_LIBRARY_PATH value for target data model.
481 */
482 {
483 /* remove the name of the .so from the JVM path */
484 lastslash = strrchr(jvmpath, '/');
485 if (lastslash)
486 *lastslash = '\0';
487
488
489 /* jvmpath, ((running != wanted)?((wanted==64)?"/"LIBARCH64NAME:"/.."):""), */
490
491 sprintf(new_runpath, LD_LIBRARY_PATH "="
492 "%s:"
493 "%s/lib/%s:"
494 "%s/../lib/%s",
495 jvmpath,
496 #ifdef DUAL_MODE
497 jrepath, ((wanted==64)?LIBARCH64NAME:LIBARCH32NAME),
498 jrepath, ((wanted==64)?LIBARCH64NAME:LIBARCH32NAME)
499 #else
500 jrepath, arch,
501 jrepath, arch
502 #endif
503 );
504
505
506 /*
507 * Check to make sure that the prefix of the current path is the
508 * desired environment variable setting.
509 */
510 if (runpath != NULL &&
511 strncmp(newpath, runpath, strlen(newpath))==0 &&
512 (runpath[strlen(newpath)] == 0 || runpath[strlen(newpath)] == ':') &&
513 (running == wanted) /* data model does not have to be changed */
514 #ifdef __sun
515 && (dmpath == NULL) /* data model specific variables not set */
516 #endif
517 ) {
518
519 return;
520
521 }
522 }
523
524 /*
525 * Place the desired environment setting onto the prefix of
526 * LD_LIBRARY_PATH. Note that this prevents any possible infinite
527 * loop of execv() because we test for the prefix, above.
528 */
529 if (runpath != 0) {
530 strcat(new_runpath, ":");
531 strcat(new_runpath, runpath);
532 }
533
534 if( putenv(new_runpath) != 0) {
535 exit(1); /* problem allocating memory; LD_LIBRARY_PATH not set
536 properly */
537 }
538
539 /*
540 * Unix systems document that they look at LD_LIBRARY_PATH only
541 * once at startup, so we have to re-exec the current executable
542 * to get the changed environment variable to have an effect.
543 */
544
545 #ifdef __sun
546 /*
547 * If dmpath is not NULL, remove the data model specific string
548 * in the environment for the exec'ed child.
549 */
550
551 if( dmpath != NULL)
552 (void)UnsetEnv((wanted==32)?"LD_LIBRARY_PATH_32":"LD_LIBRARY_PATH_64");
553 #endif
554
555 newenvp = environ;
556
557 {
558 char *newexec = execname;
559 #ifdef DUAL_MODE
560 /*
561 * If the data model is being changed, the path to the
562 * executable must be updated accordingly; the executable name
563 * and directory the executable resides in are separate. In the
564 * case of 32 => 64, the new bits are assumed to reside in, e.g.
565 * "olddir/LIBARCH64NAME/execname"; in the case of 64 => 32,
566 * the bits are assumed to be in "olddir/../execname". For example,
567 *
568 * olddir/sparcv9/execname
569 * olddir/amd64/execname
570 *
571 * for Solaris SPARC and Linux amd64, respectively.
572 */
573
574 if (running != wanted) {
575 char *oldexec = strcpy(JLI_MemAlloc(strlen(execname) + 1), execname);
576 char *olddir = oldexec;
577 char *oldbase = strrchr(oldexec, '/');
578
579
580 newexec = JLI_MemAlloc(strlen(execname) + 20);
581 *oldbase++ = 0;
582 sprintf(newexec, "%s/%s/%s", olddir,
583 ((wanted==64) ? LIBARCH64NAME : ".."), oldbase);
584 argv[0] = newexec;
585 }
586 #endif
587
588 (void)fflush(stdout);
589 (void)fflush(stderr);
590 execve(newexec, argv, newenvp);
591 perror("execve()");
592
593 fprintf(stderr, "Error trying to exec %s.\n", newexec);
594 fprintf(stderr, "Check if file exists and permissions are set correctly.\n");
595
596 #ifdef DUAL_MODE
597 if (running != wanted) {
598 fprintf(stderr, "Failed to start a %d-bit JVM process from a %d-bit JVM.\n",
599 wanted, running);
600 # ifdef __sun
601
602 # ifdef __sparc
603 fprintf(stderr, "Verify all necessary J2SE components have been installed.\n" );
604 fprintf(stderr,
605 "(Solaris SPARC 64-bit components must be installed after 32-bit components.)\n" );
606 # else
607 fprintf(stderr, "Either 64-bit processes are not supported by this platform\n");
608 fprintf(stderr, "or the 64-bit components have not been installed.\n");
609 # endif
610 }
611 # endif
612 #endif
613
614 }
615
616 exit(1);
617 }
618
619 #else /* ifndef GAMMA */
620
621 /*
622 * gamma launcher is simpler in that it doesn't handle VM flavors, data
623 * model, LD_LIBRARY_PATH, etc. Assuming everything is set-up correctly
624 * all we need to do here is to return correct path names. See also
625 * GetJVMPath() and GetApplicationHome().
626 */
627
628 { char *arch = (char *) ARCH; /* like sparc or sparcv9 */
629 char *p;
630
631 if (!GetJREPath(jrepath, so_jrepath, arch, JNI_FALSE) ) {
632 fprintf(stderr, "Error: could not find Java 2 Runtime Environment.\n");
633 exit(2);
634 }
635
636 if (!GetJVMPath(jrepath, NULL, jvmpath, so_jvmpath, arch )) {
637 fprintf(stderr, "Error: no JVM at `%s'.\n", jvmpath);
638 exit(4);
639 }
640 }
641
642 #endif /* ifndef GAMMA */
643 }
644
645
646 /*
647 * On Solaris VM choosing is done by the launcher (java.c).
648 */
649 static jboolean
650 GetJVMPath(const char *jrepath, const char *jvmtype,
651 char *jvmpath, jint jvmpathsize, char * arch)
652 {
653 struct stat s;
654
655 #ifndef GAMMA
656 if (strchr(jvmtype, '/')) {
657 sprintf(jvmpath, "%s/" JVM_DLL, jvmtype);
658 } else {
659 sprintf(jvmpath, "%s/lib/%s/%s/" JVM_DLL, jrepath, arch, jvmtype);
660 }
661 #else
662 /*
663 * For gamma launcher, JVM is either built-in or in the same directory.
664 * Either way we return "<exe_path>/libjvm.so" where <exe_path> is the
665 * directory where gamma launcher is located.
666 */
667
668 char *p;
669
670 snprintf(jvmpath, jvmpathsize, "%s", GetExecname());
671 p = strrchr(jvmpath, '/');
672 if (p) {
673 /* replace executable name with libjvm.so */
674 snprintf(p + 1, jvmpathsize - (p + 1 - jvmpath), "%s", JVM_DLL);
675 } else {
676 /* this case shouldn't happen */
677 snprintf(jvmpath, jvmpathsize, "%s", JVM_DLL);
678 }
679 #endif /* ifndef GAMMA */
680
681 if (_launcher_debug)
682 printf("Does `%s' exist ... ", jvmpath);
683
684 if (stat(jvmpath, &s) == 0) {
685 if (_launcher_debug)
686 printf("yes.\n");
687 return JNI_TRUE;
688 } else {
689 if (_launcher_debug)
690 printf("no.\n");
691 return JNI_FALSE;
692 }
693 }
694
695 /*
696 * Find path to JRE based on .exe's location or registry settings.
697 */
698 static jboolean
699 GetJREPath(char *path, jint pathsize, char * arch, jboolean speculative)
700 {
701 char libjava[MAXPATHLEN];
702
703 if (GetApplicationHome(path, pathsize)) {
704 /* Is JRE co-located with the application? */
705 sprintf(libjava, "%s/lib/%s/" JAVA_DLL, path, arch);
706 if (access(libjava, F_OK) == 0) {
707 goto found;
708 }
709
710 /* Does the app ship a private JRE in <apphome>/jre directory? */
711 sprintf(libjava, "%s/jre/lib/%s/" JAVA_DLL, path, arch);
712 if (access(libjava, F_OK) == 0) {
713 strcat(path, "/jre");
714 goto found;
715 }
716 }
717
718 if (!speculative)
719 fprintf(stderr, "Error: could not find " JAVA_DLL "\n");
720 return JNI_FALSE;
721
722 found:
723 if (_launcher_debug)
724 printf("JRE path is %s\n", path);
725 return JNI_TRUE;
726 }
727
728 jboolean
729 LoadJavaVM(const char *jvmpath, InvocationFunctions *ifn)
730 {
731 #ifdef GAMMA
732 /* JVM is directly linked with gamma launcher; no dlopen() */
733 ifn->CreateJavaVM = JNI_CreateJavaVM;
734 ifn->GetDefaultJavaVMInitArgs = JNI_GetDefaultJavaVMInitArgs;
735 return JNI_TRUE;
736 #else
737 Dl_info dlinfo;
738 void *libjvm;
739
740 if (_launcher_debug) {
741 printf("JVM path is %s\n", jvmpath);
742 }
743
744 libjvm = dlopen(jvmpath, RTLD_NOW + RTLD_GLOBAL);
745 if (libjvm == NULL) {
746 #if defined(__sparc) && !defined(_LP64) /* i.e. 32-bit sparc */
747 FILE * fp;
748 Elf32_Ehdr elf_head;
749 int count;
750 int location;
751
752 fp = fopen(jvmpath, "r");
753 if(fp == NULL)
754 goto error;
755
756 /* read in elf header */
757 count = fread((void*)(&elf_head), sizeof(Elf32_Ehdr), 1, fp);
758 fclose(fp);
759 if(count < 1)
760 goto error;
761
762 /*
763 * Check for running a server vm (compiled with -xarch=v8plus)
764 * on a stock v8 processor. In this case, the machine type in
765 * the elf header would not be included the architecture list
766 * provided by the isalist command, which is turn is gotten from
767 * sysinfo. This case cannot occur on 64-bit hardware and thus
768 * does not have to be checked for in binaries with an LP64 data
769 * model.
770 */
771 if(elf_head.e_machine == EM_SPARC32PLUS) {
772 char buf[257]; /* recommended buffer size from sysinfo man
773 page */
774 long length;
775 char* location;
776
777 length = sysinfo(SI_ISALIST, buf, 257);
778 if(length > 0) {
779 location = strstr(buf, "sparcv8plus ");
780 if(location == NULL) {
781 fprintf(stderr, "SPARC V8 processor detected; Server compiler requires V9 or better.\n");
782 fprintf(stderr, "Use Client compiler on V8 processors.\n");
783 fprintf(stderr, "Could not create the Java virtual machine.\n");
784 return JNI_FALSE;
785 }
786 }
787 }
788 #endif
789 fprintf(stderr, "dl failure on line %d", __LINE__);
790 goto error;
791 }
792
793 ifn->CreateJavaVM = (CreateJavaVM_t)
794 dlsym(libjvm, "JNI_CreateJavaVM");
795 if (ifn->CreateJavaVM == NULL)
796 goto error;
797
798 ifn->GetDefaultJavaVMInitArgs = (GetDefaultJavaVMInitArgs_t)
799 dlsym(libjvm, "JNI_GetDefaultJavaVMInitArgs");
800 if (ifn->GetDefaultJavaVMInitArgs == NULL)
801 goto error;
802
803 return JNI_TRUE;
804
805 error:
806 fprintf(stderr, "Error: failed %s, because %s\n", jvmpath, dlerror());
807 return JNI_FALSE;
808 #endif /* ifndef GAMMA */
809 }
810
811 /*
812 * If app is "/foo/bin/javac", or "/foo/bin/sparcv9/javac" then put
813 * "/foo" into buf.
814 */
815 jboolean
816 GetApplicationHome(char *buf, jint bufsize)
817 {
818 #if defined(__linux__) || defined(_ALLBSD_SOURCE)
819 char *execname = GetExecname();
820 if (execname) {
821 strncpy(buf, execname, bufsize-1);
822 buf[bufsize-1] = '\0';
823 } else {
824 return JNI_FALSE;
825 }
826 #else
827 Dl_info dlinfo;
828
829 dladdr((void *)GetApplicationHome, &dlinfo);
830 if (realpath(dlinfo.dli_fname, buf) == NULL) {
831 fprintf(stderr, "Error: realpath(`%s') failed.\n", dlinfo.dli_fname);
832 return JNI_FALSE;
833 }
834 #endif
835
836 #ifdef GAMMA
837 {
838 /* gamma launcher uses JAVA_HOME environment variable to find JDK/JRE */
839 char* java_home_var = getenv("JAVA_HOME");
840 if (java_home_var == NULL) {
841 printf("JAVA_HOME must point to a valid JDK/JRE to run gamma\n");
842 return JNI_FALSE;
843 }
844 snprintf(buf, bufsize, "%s", java_home_var);
845 }
846 #else
847 if (strrchr(buf, '/') == 0) {
848 buf[0] = '\0';
849 return JNI_FALSE;
850 }
851 *(strrchr(buf, '/')) = '\0'; /* executable file */
852 if (strlen(buf) < 4 || strrchr(buf, '/') == 0) {
853 buf[0] = '\0';
854 return JNI_FALSE;
855 }
856 if (strcmp("/bin", buf + strlen(buf) - 4) != 0)
857 *(strrchr(buf, '/')) = '\0'; /* sparcv9 or amd64 */
858 if (strlen(buf) < 4 || strcmp("/bin", buf + strlen(buf) - 4) != 0) {
859 buf[0] = '\0';
860 return JNI_FALSE;
861 }
862 *(strrchr(buf, '/')) = '\0'; /* bin */
863 #endif /* ifndef GAMMA */
864
865 return JNI_TRUE;
866 }
867
868
869 /*
870 * Return true if the named program exists
871 */
872 static int
873 ProgramExists(char *name)
874 {
875 struct stat sb;
876 if (stat(name, &sb) != 0) return 0;
877 if (S_ISDIR(sb.st_mode)) return 0;
878 return (sb.st_mode & S_IEXEC) != 0;
879 }
880
881
882 /*
883 * Find a command in a directory, returning the path.
884 */
885 static char *
886 Resolve(char *indir, char *cmd)
887 {
888 char name[PATH_MAX + 2], *real;
889
890 if ((strlen(indir) + strlen(cmd) + 1) > PATH_MAX) return 0;
891 sprintf(name, "%s%c%s", indir, FILE_SEPARATOR, cmd);
892 if (!ProgramExists(name)) return 0;
893 real = JLI_MemAlloc(PATH_MAX + 2);
894 if (!realpath(name, real))
895 strcpy(real, name);
896 return real;
897 }
898
899
900 /*
901 * Find a path for the executable
902 */
903 static char *
904 FindExecName(char *program)
905 {
906 char cwdbuf[PATH_MAX+2];
907 char *path;
908 char *tmp_path;
909 char *f;
910 char *result = NULL;
911
912 /* absolute path? */
913 if (*program == FILE_SEPARATOR ||
914 (FILE_SEPARATOR=='\\' && strrchr(program, ':')))
915 return Resolve("", program+1);
916
917 /* relative path? */
918 if (strrchr(program, FILE_SEPARATOR) != 0) {
919 char buf[PATH_MAX+2];
920 return Resolve(getcwd(cwdbuf, sizeof(cwdbuf)), program);
921 }
922
923 /* from search path? */
924 path = getenv("PATH");
925 if (!path || !*path) path = ".";
926 tmp_path = JLI_MemAlloc(strlen(path) + 2);
927 strcpy(tmp_path, path);
928
929 for (f=tmp_path; *f && result==0; ) {
930 char *s = f;
931 while (*f && (*f != PATH_SEPARATOR)) ++f;
932 if (*f) *f++ = 0;
933 if (*s == FILE_SEPARATOR)
934 result = Resolve(s, program);
935 else {
936 /* relative path element */
937 char dir[2*PATH_MAX];
938 sprintf(dir, "%s%c%s", getcwd(cwdbuf, sizeof(cwdbuf)),
939 FILE_SEPARATOR, s);
940 result = Resolve(dir, program);
941 }
942 if (result != 0) break;
943 }
944
945 JLI_MemFree(tmp_path);
946 return result;
947 }
948
949
950 /* Store the name of the executable once computed */
951 static char *execname = NULL;
952
953 /*
954 * Compute the name of the executable
955 *
956 * In order to re-exec securely we need the absolute path of the
957 * executable. On Solaris getexecname(3c) may not return an absolute
958 * path so we use dladdr to get the filename of the executable and
959 * then use realpath to derive an absolute path. From Solaris 9
960 * onwards the filename returned in DL_info structure from dladdr is
961 * an absolute pathname so technically realpath isn't required.
962 * On Linux we read the executable name from /proc/self/exe.
963 * As a fallback, and for platforms other than Solaris and Linux,
964 * we use FindExecName to compute the executable name.
965 */
966 static char *
967 SetExecname(char **argv)
968 {
969 char* exec_path = NULL;
970
971 if (execname != NULL) /* Already determined */
972 return (execname);
973
974 #if defined(__sun)
975 {
976 Dl_info dlinfo;
977 if (dladdr((void*)&SetExecname, &dlinfo)) {
978 char *resolved = (char*)JLI_MemAlloc(PATH_MAX+1);
979 if (resolved != NULL) {
980 exec_path = realpath(dlinfo.dli_fname, resolved);
981 if (exec_path == NULL) {
982 JLI_MemFree(resolved);
983 }
984 }
985 }
986 }
987 #elif defined(__linux__)
988 {
989 const char* self = "/proc/self/exe";
990 char buf[PATH_MAX+1];
991 int len = readlink(self, buf, PATH_MAX);
992 if (len >= 0) {
993 buf[len] = '\0'; /* readlink doesn't nul terminate */
994 exec_path = JLI_StringDup(buf);
995 }
996 }
997 #else /* !__sun && !__linux */
998 {
999 /* Not implemented */
1000 }
1001 #endif
1002
1003 if (exec_path == NULL) {
1004 exec_path = FindExecName(argv[0]);
1005 }
1006 execname = exec_path;
1007 return exec_path;
1008 }
1009
1010 /*
1011 * Return the name of the executable. Used in java_md.c to find the JRE area.
1012 */
1013 static char *
1014 GetExecname() {
1015 return execname;
1016 }
1017
1018 void ReportErrorMessage(char * message, jboolean always) {
1019 if (always) {
1020 fprintf(stderr, "%s\n", message);
1021 }
1022 }
1023
1024 void ReportErrorMessage2(char * format, char * string, jboolean always) {
1025 if (always) {
1026 fprintf(stderr, format, string);
1027 fprintf(stderr, "\n");
1028 }
1029 }
1030
1031 void ReportExceptionDescription(JNIEnv * env) {
1032 (*env)->ExceptionDescribe(env);
1033 }
1034
1035 /*
1036 * Return JNI_TRUE for an option string that has no effect but should
1037 * _not_ be passed on to the vm; return JNI_FALSE otherwise. On
1038 * Solaris SPARC, this screening needs to be done if:
1039 * 1) LD_LIBRARY_PATH does _not_ need to be reset and
1040 * 2) -d32 or -d64 is passed to a binary with a matching data model
1041 * (the exec in SetLibraryPath removes -d<n> options and points the
1042 * exec to the proper binary). When this exec is not done, these options
1043 * would end up getting passed onto the vm.
1044 */
1045 jboolean RemovableMachineDependentOption(char * option) {
1046 /*
1047 * Unconditionally remove both -d32 and -d64 options since only
1048 * the last such options has an effect; e.g.
1049 * java -d32 -d64 -d32 -version
1050 * is equivalent to
1051 * java -d32 -version
1052 */
1053
1054 if( (strcmp(option, "-d32") == 0 ) ||
1055 (strcmp(option, "-d64") == 0 ))
1056 return JNI_TRUE;
1057 else
1058 return JNI_FALSE;
1059 }
1060
1061 void PrintMachineDependentOptions() {
1062 fprintf(stdout,
1063 " -d32 use a 32-bit data model if available\n"
1064 "\n"
1065 " -d64 use a 64-bit data model if available\n");
1066 return;
1067 }
1068
1069 #ifndef GAMMA
1070 /*
1071 * The following methods (down to ServerClassMachine()) answer
1072 * the question about whether a machine is a "server-class"
1073 * machine. A server-class machine is loosely defined as one
1074 * with 2 or more processors and 2 gigabytes or more physical
1075 * memory. The definition of a processor is a physical package,
1076 * not a hyperthreaded chip masquerading as a multi-processor.
1077 * The definition of memory is also somewhat fuzzy, since x86
1078 * machines seem not to report all the memory in their DIMMs, we
1079 * think because of memory mapping of graphics cards, etc.
1080 *
1081 * This code is somewhat more confused with #ifdef's than we'd
1082 * like because this file is used by both Solaris and Linux
1083 * platforms, and so needs to be parameterized for SPARC and
1084 * i586 hardware. The other Linux platforms (amd64 and ia64)
1085 * don't even ask this question, because they only come with
1086 * server JVMs. */
1087
1088 # define KB (1024UL)
1089 # define MB (1024UL * KB)
1090 # define GB (1024UL * MB)
1091
1092 /* Compute physical memory by asking the OS */
1093 uint64_t
1094 physical_memory(void) {
1095 const uint64_t pages = (uint64_t) sysconf(_SC_PHYS_PAGES);
1096 const uint64_t page_size = (uint64_t) sysconf(_SC_PAGESIZE);
1097 const uint64_t result = pages * page_size;
1098 # define UINT64_FORMAT "%" PRIu64
1099
1100 if (_launcher_debug) {
1101 printf("pages: " UINT64_FORMAT
1102 " page_size: " UINT64_FORMAT
1103 " physical memory: " UINT64_FORMAT " (%.3fGB)\n",
1104 pages, page_size, result, result / (double) GB);
1105 }
1106 return result;
1107 }
1108
1109 #if defined(__sun) && defined(__sparc)
1110
1111 /* Methods for solaris-sparc: these are easy. */
1112
1113 /* Ask the OS how many processors there are. */
1114 unsigned long
1115 physical_processors(void) {
1116 const unsigned long sys_processors = sysconf(_SC_NPROCESSORS_CONF);
1117
1118 if (_launcher_debug) {
1119 printf("sysconf(_SC_NPROCESSORS_CONF): %lu\n", sys_processors);
1120 }
1121 return sys_processors;
1122 }
1123
1124 /* The solaris-sparc version of the "server-class" predicate. */
1125 jboolean
1126 solaris_sparc_ServerClassMachine(void) {
1127 jboolean result = JNI_FALSE;
1128 /* How big is a server class machine? */
1129 const unsigned long server_processors = 2UL;
1130 const uint64_t server_memory = 2UL * GB;
1131 const uint64_t actual_memory = physical_memory();
1132
1133 /* Is this a server class machine? */
1134 if (actual_memory >= server_memory) {
1135 const unsigned long actual_processors = physical_processors();
1136 if (actual_processors >= server_processors) {
1137 result = JNI_TRUE;
1138 }
1139 }
1140 if (_launcher_debug) {
1141 printf("solaris_" LIBARCHNAME "_ServerClassMachine: %s\n",
1142 (result == JNI_TRUE ? "JNI_TRUE" : "JNI_FALSE"));
1143 }
1144 return result;
1145 }
1146
1147 #endif /* __sun && __sparc */
1148
1149 #if defined(__sun) && defined(i586)
1150
1151 /*
1152 * A utility method for asking the CPU about itself.
1153 * There's a corresponding version of linux-i586
1154 * because the compilers are different.
1155 */
1156 void
1157 get_cpuid(uint32_t arg,
1158 uint32_t* eaxp,
1159 uint32_t* ebxp,
1160 uint32_t* ecxp,
1161 uint32_t* edxp) {
1162 #ifdef _LP64
1163 asm(
1164 /* rbx is a callee-saved register */
1165 " movq %rbx, %r11 \n"
1166 /* rdx and rcx are 3rd and 4th argument registers */
1167 " movq %rdx, %r10 \n"
1168 " movq %rcx, %r9 \n"
1169 " movl %edi, %eax \n"
1170 " cpuid \n"
1171 " movl %eax, (%rsi)\n"
1172 " movl %ebx, (%r10)\n"
1173 " movl %ecx, (%r9) \n"
1174 " movl %edx, (%r8) \n"
1175 /* Restore rbx */
1176 " movq %r11, %rbx");
1177 #else
1178 /* EBX is a callee-saved register */
1179 asm(" pushl %ebx");
1180 /* Need ESI for storing through arguments */
1181 asm(" pushl %esi");
1182 asm(" movl 8(%ebp), %eax \n"
1183 " cpuid \n"
1184 " movl 12(%ebp), %esi \n"
1185 " movl %eax, (%esi) \n"
1186 " movl 16(%ebp), %esi \n"
1187 " movl %ebx, (%esi) \n"
1188 " movl 20(%ebp), %esi \n"
1189 " movl %ecx, (%esi) \n"
1190 " movl 24(%ebp), %esi \n"
1191 " movl %edx, (%esi) ");
1192 /* Restore ESI and EBX */
1193 asm(" popl %esi");
1194 /* Restore EBX */
1195 asm(" popl %ebx");
1196 #endif
1197 }
1198
1199 #endif /* __sun && i586 */
1200
1201 #if (defined(__linux__) || defined(_ALLBSD_SOURCE)) && defined(i586)
1202
1203 /*
1204 * A utility method for asking the CPU about itself.
1205 * There's a corresponding version of solaris-i586
1206 * because the compilers are different.
1207 */
1208 void
1209 get_cpuid(uint32_t arg,
1210 uint32_t* eaxp,
1211 uint32_t* ebxp,
1212 uint32_t* ecxp,
1213 uint32_t* edxp) {
1214 #ifdef _LP64
1215 __asm__ volatile (/* Instructions */
1216 " movl %4, %%eax \n"
1217 " cpuid \n"
1218 " movl %%eax, (%0)\n"
1219 " movl %%ebx, (%1)\n"
1220 " movl %%ecx, (%2)\n"
1221 " movl %%edx, (%3)\n"
1222 : /* Outputs */
1223 : /* Inputs */
1224 "r" (eaxp),
1225 "r" (ebxp),
1226 "r" (ecxp),
1227 "r" (edxp),
1228 "r" (arg)
1229 : /* Clobbers */
1230 "%rax", "%rbx", "%rcx", "%rdx", "memory"
1231 );
1232 #else
1233 uint32_t value_of_eax = 0;
1234 uint32_t value_of_ebx = 0;
1235 uint32_t value_of_ecx = 0;
1236 uint32_t value_of_edx = 0;
1237 __asm__ volatile (/* Instructions */
1238 /* ebx is callee-save, so push it */
1239 " pushl %%ebx \n"
1240 " movl %4, %%eax \n"
1241 " cpuid \n"
1242 " movl %%eax, %0 \n"
1243 " movl %%ebx, %1 \n"
1244 " movl %%ecx, %2 \n"
1245 " movl %%edx, %3 \n"
1246 /* restore ebx */
1247 " popl %%ebx \n"
1248
1249 : /* Outputs */
1250 "=m" (value_of_eax),
1251 "=m" (value_of_ebx),
1252 "=m" (value_of_ecx),
1253 "=m" (value_of_edx)
1254 : /* Inputs */
1255 "m" (arg)
1256 : /* Clobbers */
1257 "%eax", "%ecx", "%edx"
1258 );
1259 *eaxp = value_of_eax;
1260 *ebxp = value_of_ebx;
1261 *ecxp = value_of_ecx;
1262 *edxp = value_of_edx;
1263 #endif
1264 }
1265
1266 #endif /* __linux__ && i586 */
1267
1268 #ifdef i586
1269 /*
1270 * Routines shared by solaris-i586 and linux-i586.
1271 */
1272
1273 enum HyperThreadingSupport_enum {
1274 hts_supported = 1,
1275 hts_too_soon_to_tell = 0,
1276 hts_not_supported = -1,
1277 hts_not_pentium4 = -2,
1278 hts_not_intel = -3
1279 };
1280 typedef enum HyperThreadingSupport_enum HyperThreadingSupport;
1281
1282 /* Determine if hyperthreading is supported */
1283 HyperThreadingSupport
1284 hyperthreading_support(void) {
1285 HyperThreadingSupport result = hts_too_soon_to_tell;
1286 /* Bits 11 through 8 is family processor id */
1287 # define FAMILY_ID_SHIFT 8
1288 # define FAMILY_ID_MASK 0xf
1289 /* Bits 23 through 20 is extended family processor id */
1290 # define EXT_FAMILY_ID_SHIFT 20
1291 # define EXT_FAMILY_ID_MASK 0xf
1292 /* Pentium 4 family processor id */
1293 # define PENTIUM4_FAMILY_ID 0xf
1294 /* Bit 28 indicates Hyper-Threading Technology support */
1295 # define HT_BIT_SHIFT 28
1296 # define HT_BIT_MASK 1
1297 uint32_t vendor_id[3] = { 0U, 0U, 0U };
1298 uint32_t value_of_eax = 0U;
1299 uint32_t value_of_edx = 0U;
1300 uint32_t dummy = 0U;
1301
1302 /* Yes, this is supposed to be [0], [2], [1] */
1303 get_cpuid(0, &dummy, &vendor_id[0], &vendor_id[2], &vendor_id[1]);
1304 if (_launcher_debug) {
1305 printf("vendor: %c %c %c %c %c %c %c %c %c %c %c %c \n",
1306 ((vendor_id[0] >> 0) & 0xff),
1307 ((vendor_id[0] >> 8) & 0xff),
1308 ((vendor_id[0] >> 16) & 0xff),
1309 ((vendor_id[0] >> 24) & 0xff),
1310 ((vendor_id[1] >> 0) & 0xff),
1311 ((vendor_id[1] >> 8) & 0xff),
1312 ((vendor_id[1] >> 16) & 0xff),
1313 ((vendor_id[1] >> 24) & 0xff),
1314 ((vendor_id[2] >> 0) & 0xff),
1315 ((vendor_id[2] >> 8) & 0xff),
1316 ((vendor_id[2] >> 16) & 0xff),
1317 ((vendor_id[2] >> 24) & 0xff));
1318 }
1319 get_cpuid(1, &value_of_eax, &dummy, &dummy, &value_of_edx);
1320 if (_launcher_debug) {
1321 printf("value_of_eax: 0x%x value_of_edx: 0x%x\n",
1322 value_of_eax, value_of_edx);
1323 }
1324 if ((((value_of_eax >> FAMILY_ID_SHIFT) & FAMILY_ID_MASK) == PENTIUM4_FAMILY_ID) ||
1325 (((value_of_eax >> EXT_FAMILY_ID_SHIFT) & EXT_FAMILY_ID_MASK) != 0)) {
1326 if ((((vendor_id[0] >> 0) & 0xff) == 'G') &&
1327 (((vendor_id[0] >> 8) & 0xff) == 'e') &&
1328 (((vendor_id[0] >> 16) & 0xff) == 'n') &&
1329 (((vendor_id[0] >> 24) & 0xff) == 'u') &&
1330 (((vendor_id[1] >> 0) & 0xff) == 'i') &&
1331 (((vendor_id[1] >> 8) & 0xff) == 'n') &&
1332 (((vendor_id[1] >> 16) & 0xff) == 'e') &&
1333 (((vendor_id[1] >> 24) & 0xff) == 'I') &&
1334 (((vendor_id[2] >> 0) & 0xff) == 'n') &&
1335 (((vendor_id[2] >> 8) & 0xff) == 't') &&
1336 (((vendor_id[2] >> 16) & 0xff) == 'e') &&
1337 (((vendor_id[2] >> 24) & 0xff) == 'l')) {
1338 if (((value_of_edx >> HT_BIT_SHIFT) & HT_BIT_MASK) == HT_BIT_MASK) {
1339 if (_launcher_debug) {
1340 printf("Hyperthreading supported\n");
1341 }
1342 result = hts_supported;
1343 } else {
1344 if (_launcher_debug) {
1345 printf("Hyperthreading not supported\n");
1346 }
1347 result = hts_not_supported;
1348 }
1349 } else {
1350 if (_launcher_debug) {
1351 printf("Not GenuineIntel\n");
1352 }
1353 result = hts_not_intel;
1354 }
1355 } else {
1356 if (_launcher_debug) {
1357 printf("not Pentium 4 or extended\n");
1358 }
1359 result = hts_not_pentium4;
1360 }
1361 return result;
1362 }
1363
1364 /* Determine how many logical processors there are per CPU */
1365 unsigned int
1366 logical_processors_per_package(void) {
1367 /*
1368 * After CPUID with EAX==1, register EBX bits 23 through 16
1369 * indicate the number of logical processors per package
1370 */
1371 # define NUM_LOGICAL_SHIFT 16
1372 # define NUM_LOGICAL_MASK 0xff
1373 unsigned int result = 1U;
1374 const HyperThreadingSupport hyperthreading = hyperthreading_support();
1375
1376 if (hyperthreading == hts_supported) {
1377 uint32_t value_of_ebx = 0U;
1378 uint32_t dummy = 0U;
1379
1380 get_cpuid(1, &dummy, &value_of_ebx, &dummy, &dummy);
1381 result = (value_of_ebx >> NUM_LOGICAL_SHIFT) & NUM_LOGICAL_MASK;
1382 if (_launcher_debug) {
1383 printf("logical processors per package: %u\n", result);
1384 }
1385 }
1386 return result;
1387 }
1388
1389 /* Compute the number of physical processors, not logical processors */
1390 unsigned long
1391 physical_processors(void) {
1392 const long sys_processors = sysconf(_SC_NPROCESSORS_CONF);
1393 unsigned long result = sys_processors;
1394
1395 if (_launcher_debug) {
1396 printf("sysconf(_SC_NPROCESSORS_CONF): %lu\n", sys_processors);
1397 }
1398 if (sys_processors > 1) {
1399 unsigned int logical_processors = logical_processors_per_package();
1400 if (logical_processors > 1) {
1401 result = (unsigned long) sys_processors / logical_processors;
1402 }
1403 }
1404 if (_launcher_debug) {
1405 printf("physical processors: %lu\n", result);
1406 }
1407 return result;
1408 }
1409
1410 #endif /* i586 */
1411
1412 #if defined(__sun) && defined(i586)
1413
1414 /* The definition of a server-class machine for solaris-i586/amd64 */
1415 jboolean
1416 solaris_i586_ServerClassMachine(void) {
1417 jboolean result = JNI_FALSE;
1418 /* How big is a server class machine? */
1419 const unsigned long server_processors = 2UL;
1420 const uint64_t server_memory = 2UL * GB;
1421 /*
1422 * We seem not to get our full complement of memory.
1423 * We allow some part (1/8?) of the memory to be "missing",
1424 * based on the sizes of DIMMs, and maybe graphics cards.
1425 */
1426 const uint64_t missing_memory = 256UL * MB;
1427 const uint64_t actual_memory = physical_memory();
1428
1429 /* Is this a server class machine? */
1430 if (actual_memory >= (server_memory - missing_memory)) {
1431 const unsigned long actual_processors = physical_processors();
1432 if (actual_processors >= server_processors) {
1433 result = JNI_TRUE;
1434 }
1435 }
1436 if (_launcher_debug) {
1437 printf("solaris_" LIBARCHNAME "_ServerClassMachine: %s\n",
1438 (result == JNI_TRUE ? "true" : "false"));
1439 }
1440 return result;
1441 }
1442
1443 #endif /* __sun && i586 */
1444
1445 #if defined(__linux__) && defined(i586)
1446
1447 /* The definition of a server-class machine for linux-i586 */
1448 jboolean
1449 linux_i586_ServerClassMachine(void) {
1450 jboolean result = JNI_FALSE;
1451 /* How big is a server class machine? */
1452 const unsigned long server_processors = 2UL;
1453 const uint64_t server_memory = 2UL * GB;
1454 /*
1455 * We seem not to get our full complement of memory.
1456 * We allow some part (1/8?) of the memory to be "missing",
1457 * based on the sizes of DIMMs, and maybe graphics cards.
1458 */
1459 const uint64_t missing_memory = 256UL * MB;
1460 const uint64_t actual_memory = physical_memory();
1461
1462 /* Is this a server class machine? */
1463 if (actual_memory >= (server_memory - missing_memory)) {
1464 const unsigned long actual_processors = physical_processors();
1465 if (actual_processors >= server_processors) {
1466 result = JNI_TRUE;
1467 }
1468 }
1469 if (_launcher_debug) {
1470 printf("linux_" LIBARCHNAME "_ServerClassMachine: %s\n",
1471 (result == JNI_TRUE ? "true" : "false"));
1472 }
1473 return result;
1474 }
1475
1476 #endif /* __linux__ && i586 */
1477
1478 #if defined(_ALLBSD_SOURCE) && defined(i586)
1479
1480 /* The definition of a server-class machine for bsd-i586 */
1481 jboolean
1482 bsd_i586_ServerClassMachine(void) {
1483 jboolean result = JNI_FALSE;
1484 /* How big is a server class machine? */
1485 const unsigned long server_processors = 2UL;
1486 const uint64_t server_memory = 2UL * GB;
1487 /*
1488 * We seem not to get our full complement of memory.
1489 * We allow some part (1/8?) of the memory to be "missing",
1490 * based on the sizes of DIMMs, and maybe graphics cards.
1491 */
1492 const uint64_t missing_memory = 256UL * MB;
1493 const uint64_t actual_memory = physical_memory();
1494
1495 /* Is this a server class machine? */
1496 if (actual_memory >= (server_memory - missing_memory)) {
1497 const unsigned long actual_processors = physical_processors();
1498 if (actual_processors >= server_processors) {
1499 result = JNI_TRUE;
1500 }
1501 }
1502 if (_launcher_debug) {
1503 printf("linux_" LIBARCHNAME "_ServerClassMachine: %s\n",
1504 (result == JNI_TRUE ? "true" : "false"));
1505 }
1506 return result;
1507 }
1508
1509 #endif /* _ALLBSD_SOURCE && i586 */
1510
1511 /* Dispatch to the platform-specific definition of "server-class" */
1512 jboolean
1513 ServerClassMachine(void) {
1514 jboolean result = JNI_FALSE;
1515 #if defined(NEVER_ACT_AS_SERVER_CLASS_MACHINE)
1516 result = JNI_FALSE;
1517 #elif defined(ALWAYS_ACT_AS_SERVER_CLASS_MACHINE)
1518 result = JNI_TRUE;
1519 #elif defined(__sun) && defined(__sparc)
1520 result = solaris_sparc_ServerClassMachine();
1521 #elif defined(__sun) && defined(i586)
1522 result = solaris_i586_ServerClassMachine();
1523 #elif defined(__linux__) && defined(i586)
1524 result = linux_i586_ServerClassMachine();
1525 #elif defined(_ALLBSD_SOURCE) && defined(i586)
1526 result = bsd_i586_ServerClassMachine();
1527 #else
1528 if (_launcher_debug) {
1529 printf("ServerClassMachine: returns default value of %s\n",
1530 (result == JNI_TRUE ? "true" : "false"));
1531 }
1532 #endif
1533 return result;
1534 }
1535
1536 /*
1537 * Since using the file system as a registry is a bit risky, perform
1538 * additional sanity checks on the identified directory to validate
1539 * it as a valid jre/sdk.
1540 *
1541 * Return 0 if the tests fail; otherwise return non-zero (true).
1542 *
1543 * Note that checking for anything more than the existence of an
1544 * executable object at bin/java relative to the path being checked
1545 * will break the regression tests.
1546 */
1547 static int
1548 CheckSanity(char *path, char *dir)
1549 {
1550 char buffer[PATH_MAX];
1551
1552 if (strlen(path) + strlen(dir) + 11 > PATH_MAX)
1553 return (0); /* Silently reject "impossibly" long paths */
1554
1555 (void)strcat(strcat(strcat(strcpy(buffer, path), "/"), dir), "/bin/java");
1556 return ((access(buffer, X_OK) == 0) ? 1 : 0);
1557 }
1558
1559 /*
1560 * Determine if there is an acceptable JRE in the directory dirname.
1561 * Upon locating the "best" one, return a fully qualified path to
1562 * it. "Best" is defined as the most advanced JRE meeting the
1563 * constraints contained in the manifest_info. If no JRE in this
1564 * directory meets the constraints, return NULL.
1565 *
1566 * Note that we don't check for errors in reading the directory
1567 * (which would be done by checking errno). This is because it
1568 * doesn't matter if we get an error reading the directory, or
1569 * we just don't find anything interesting in the directory. We
1570 * just return NULL in either case.
1571 *
1572 * The historical names of j2sdk and j2re were changed to jdk and
1573 * jre respecively as part of the 1.5 rebranding effort. Since the
1574 * former names are legacy on Linux, they must be recognized for
1575 * all time. Fortunately, this is a minor cost.
1576 */
1577 static char
1578 *ProcessDir(manifest_info *info, char *dirname)
1579 {
1580 DIR *dirp;
1581 struct dirent *dp;
1582 char *best = NULL;
1583 int offset;
1584 int best_offset = 0;
1585 char *ret_str = NULL;
1586 char buffer[PATH_MAX];
1587
1588 if ((dirp = opendir(dirname)) == NULL)
1589 return (NULL);
1590
1591 do {
1592 if ((dp = readdir(dirp)) != NULL) {
1593 offset = 0;
1594 if ((strncmp(dp->d_name, "jre", 3) == 0) ||
1595 (strncmp(dp->d_name, "jdk", 3) == 0))
1596 offset = 3;
1597 else if (strncmp(dp->d_name, "j2re", 4) == 0)
1598 offset = 4;
1599 else if (strncmp(dp->d_name, "j2sdk", 5) == 0)
1600 offset = 5;
1601 if (offset > 0) {
1602 if ((JLI_AcceptableRelease(dp->d_name + offset,
1603 info->jre_version)) && CheckSanity(dirname, dp->d_name))
1604 if ((best == NULL) || (JLI_ExactVersionId(
1605 dp->d_name + offset, best + best_offset) > 0)) {
1606 if (best != NULL)
1607 JLI_MemFree(best);
1608 best = JLI_StringDup(dp->d_name);
1609 best_offset = offset;
1610 }
1611 }
1612 }
1613 } while (dp != NULL);
1614 (void) closedir(dirp);
1615 if (best == NULL)
1616 return (NULL);
1617 else {
1618 ret_str = JLI_MemAlloc(strlen(dirname) + strlen(best) + 2);
1619 ret_str = strcat(strcat(strcpy(ret_str, dirname), "/"), best);
1620 JLI_MemFree(best);
1621 return (ret_str);
1622 }
1623 }
1624
1625 /*
1626 * This is the global entry point. It examines the host for the optimal
1627 * JRE to be used by scanning a set of directories. The set of directories
1628 * is platform dependent and can be overridden by the environment
1629 * variable JAVA_VERSION_PATH.
1630 *
1631 * This routine itself simply determines the set of appropriate
1632 * directories before passing control onto ProcessDir().
1633 */
1634 char*
1635 LocateJRE(manifest_info* info)
1636 {
1637 char *path;
1638 char *home;
1639 char *target = NULL;
1640 char *dp;
1641 char *cp;
1642
1643 /*
1644 * Start by getting JAVA_VERSION_PATH
1645 */
1646 if (info->jre_restrict_search)
1647 path = JLI_StringDup(system_dir);
1648 else if ((path = getenv("JAVA_VERSION_PATH")) != NULL)
1649 path = JLI_StringDup(path);
1650 else
1651 if ((home = getenv("HOME")) != NULL) {
1652 path = (char *)JLI_MemAlloc(strlen(home) + strlen(system_dir) +
1653 strlen(user_dir) + 2);
1654 path = strcat(strcat(strcat(strcpy(path, home),
1655 user_dir), ":"), system_dir);
1656 } else
1657 path = JLI_StringDup(system_dir);
1658
1659 /*
1660 * Step through each directory on the path. Terminate the scan with
1661 * the first directory with an acceptable JRE.
1662 */
1663 cp = dp = path;
1664 while (dp != NULL) {
1665 cp = strchr(dp, (int)':');
1666 if (cp != NULL)
1667 *cp = (char)NULL;
1668 if ((target = ProcessDir(info, dp)) != NULL)
1669 break;
1670 dp = cp;
1671 if (dp != NULL)
1672 dp++;
1673 }
1674 JLI_MemFree(path);
1675 return (target);
1676 }
1677
1678 /*
1679 * Given a path to a jre to execute, this routine checks if this process
1680 * is indeed that jre. If not, it exec's that jre.
1681 *
1682 * We want to actually check the paths rather than just the version string
1683 * built into the executable, so that given version specification (and
1684 * JAVA_VERSION_PATH) will yield the exact same Java environment, regardless
1685 * of the version of the arbitrary launcher we start with.
1686 */
1687 void
1688 ExecJRE(char *jre, char **argv)
1689 {
1690 char wanted[PATH_MAX];
1691 char *execname;
1692 char *progname;
1693
1694 /*
1695 * Resolve the real path to the directory containing the selected JRE.
1696 */
1697 if (realpath(jre, wanted) == NULL) {
1698 fprintf(stderr, "Unable to resolve %s\n", jre);
1699 exit(1);
1700 }
1701
1702 /*
1703 * Resolve the real path to the currently running launcher.
1704 */
1705 execname = SetExecname(argv);
1706 if (execname == NULL) {
1707 fprintf(stderr, "Unable to resolve current executable\n");
1708 exit(1);
1709 }
1710
1711 /*
1712 * If the path to the selected JRE directory is a match to the initial
1713 * portion of the path to the currently executing JRE, we have a winner!
1714 * If so, just return.
1715 */
1716 if (strncmp(wanted, execname, strlen(wanted)) == 0)
1717 return; /* I am the droid you were looking for */
1718
1719 /*
1720 * If this isn't the selected version, exec the selected version.
1721 */
1722 #ifdef JAVA_ARGS /* javac, jar and friends. */
1723 progname = "java";
1724 #else /* java, oldjava, javaw and friends */
1725 #ifdef PROGNAME
1726 progname = PROGNAME;
1727 #else
1728 progname = *argv;
1729 if ((s = strrchr(progname, FILE_SEPARATOR)) != 0) {
1730 progname = s + 1;
1731 }
1732 #endif /* PROGNAME */
1733 #endif /* JAVA_ARGS */
1734
1735 /*
1736 * This should never happen (because of the selection code in SelectJRE),
1737 * but check for "impossibly" long path names just because buffer overruns
1738 * can be so deadly.
1739 */
1740 if (strlen(wanted) + strlen(progname) + 6 > PATH_MAX) {
1741 fprintf(stderr, "Path length exceeds maximum length (PATH_MAX)\n");
1742 exit(1);
1743 }
1744
1745 /*
1746 * Construct the path and exec it.
1747 */
1748 (void)strcat(strcat(wanted, "/bin/"), progname);
1749 argv[0] = progname;
1750 if (_launcher_debug) {
1751 int i;
1752 printf("ReExec Command: %s (%s)\n", wanted, argv[0]);
1753 printf("ReExec Args:");
1754 for (i = 1; argv[i] != NULL; i++)
1755 printf(" %s", argv[i]);
1756 printf("\n");
1757 }
1758 (void)fflush(stdout);
1759 (void)fflush(stderr);
1760 execv(wanted, argv);
1761 perror("execv()");
1762 fprintf(stderr, "Exec of %s failed\n", wanted);
1763 exit(1);
1764 }
1765 #endif /* ifndef GAMMA */
1766
1767 /*
1768 * "Borrowed" from Solaris 10 where the unsetenv() function is being added
1769 * to libc thanks to SUSv3 (Standard Unix Specification, version 3). As
1770 * such, in the fullness of time this will appear in libc on all relevant
1771 * Solaris/Linux platforms and maybe even the Windows platform. At that
1772 * time, this stub can be removed.
1773 *
1774 * This implementation removes the environment locking for multithreaded
1775 * applications. (We don't have access to these mutexes within libc and
1776 * the launcher isn't multithreaded.) Note that what remains is platform
1777 * independent, because it only relies on attributes that a POSIX environment
1778 * defines.
1779 *
1780 * Returns 0 on success, -1 on failure.
1781 *
1782 * Also removed was the setting of errno. The only value of errno set
1783 * was EINVAL ("Invalid Argument").
1784 */
1785
1786 /*
1787 * s1(environ) is name=value
1788 * s2(name) is name(not the form of name=value).
1789 * if names match, return value of 1, else return 0
1790 */
1791 static int
1792 match_noeq(const char *s1, const char *s2)
1793 {
1794 while (*s1 == *s2++) {
1795 if (*s1++ == '=')
1796 return (1);
1797 }
1798 if (*s1 == '=' && s2[-1] == '\0')
1799 return (1);
1800 return (0);
1801 }
1802
1803 /*
1804 * added for SUSv3 standard
1805 *
1806 * Delete entry from environ.
1807 * Do not free() memory! Other threads may be using it.
1808 * Keep it around forever.
1809 */
1810 static int
1811 borrowed_unsetenv(const char *name)
1812 {
1813 long idx; /* index into environ */
1814
1815 if (name == NULL || *name == '\0' ||
1816 strchr(name, '=') != NULL) {
1817 return (-1);
1818 }
1819
1820 for (idx = 0; environ[idx] != NULL; idx++) {
1821 if (match_noeq(environ[idx], name))
1822 break;
1823 }
1824 if (environ[idx] == NULL) {
1825 /* name not found but still a success */
1826 return (0);
1827 }
1828 /* squeeze up one entry */
1829 do {
1830 environ[idx] = environ[idx+1];
1831 } while (environ[++idx] != NULL);
1832
1833 return (0);
1834 }
1835 /* --- End of "borrowed" code --- */
1836
1837 /*
1838 * Wrapper for unsetenv() function.
1839 */
1840 int
1841 UnsetEnv(char *name)
1842 {
1843 return(borrowed_unsetenv(name));
1844 }
1845
1846 /* --- Splash Screen shared library support --- */
1847
1848 static const char* SPLASHSCREEN_SO = "libsplashscreen.so";
1849
1850 static void* hSplashLib = NULL;
1851
1852 void* SplashProcAddress(const char* name) {
1853 if (!hSplashLib) {
1854 hSplashLib = dlopen(SPLASHSCREEN_SO, RTLD_LAZY | RTLD_GLOBAL);
1855 }
1856 if (hSplashLib) {
1857 void* sym = dlsym(hSplashLib, name);
1858 return sym;
1859 } else {
1860 return NULL;
1861 }
1862 }
1863
1864 void SplashFreeLibrary() {
1865 if (hSplashLib) {
1866 dlclose(hSplashLib);
1867 hSplashLib = NULL;
1868 }
1869 }
1870
1871 const char *
1872 jlong_format_specifier() {
1873 return "%lld";
1874 }
1875
1876 /*
1877 * Block current thread and continue execution in a new thread
1878 */
1879 int
1880 ContinueInNewThread(int (JNICALL *continuation)(void *), jlong stack_size, void * args) {
1881 int rslt;
1882 #if defined(__linux__) || defined(_ALLBSD_SOURCE)
1883 pthread_t tid;
1884 pthread_attr_t attr;
1885 pthread_attr_init(&attr);
1886 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
1887
1888 if (stack_size > 0) {
1889 pthread_attr_setstacksize(&attr, stack_size);
1890 }
1891
1892 if (pthread_create(&tid, &attr, (void *(*)(void*))continuation, (void*)args) == 0) {
1893 void * tmp;
1894 pthread_join(tid, &tmp);
1895 rslt = (int)(intptr_t)tmp;
1896 } else {
1897 /*
1898 * Continue execution in current thread if for some reason (e.g. out of
1899 * memory/LWP) a new thread can't be created. This will likely fail
1900 * later in continuation as JNI_CreateJavaVM needs to create quite a
1901 * few new threads, anyway, just give it a try..
1902 */
1903 rslt = continuation(args);
1904 }
1905
1906 pthread_attr_destroy(&attr);
1907 #else
1908 thread_t tid;
1909 long flags = 0;
1910 if (thr_create(NULL, stack_size, (void *(*)(void *))continuation, args, flags, &tid) == 0) {
1911 void * tmp;
1912 thr_join(tid, NULL, &tmp);
1913 rslt = (int)(intptr_t)tmp;
1914 } else {
1915 /* See above. Continue in current thread if thr_create() failed */
1916 rslt = continuation(args);
1917 }
1918 #endif
1919 return rslt;
1920 }
1921
1922 /* Coarse estimation of number of digits assuming the worst case is a 64-bit pid. */
1923 #define MAX_PID_STR_SZ 20
1924
1925 void SetJavaLauncherPlatformProps() {
1926 /* Linux only */
1927 #ifdef __linux__
1928 const char *substr = "-Dsun.java.launcher.pid=";
1929 char *pid_prop_str = (char *)JLI_MemAlloc(strlen(substr) + MAX_PID_STR_SZ + 1);
1930 sprintf(pid_prop_str, "%s%d", substr, getpid());
1931 AddOption(pid_prop_str, NULL);
1932 #endif
1933 }