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comparison src/os/posix/launcher/java_md.c @ 2023:54f5dd2aa1d9

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Merge
author zgu
date Sat, 11 Dec 2010 13:46:36 -0500
parents cb2d0a362639
children aa6e219afbf1
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2022:2d4762ec74af 2023:54f5dd2aa1d9
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 #ifdef __linux__
45 #include <pthread.h>
46 #else
47 #include <thread.h>
48 #endif
49
50 #define JVM_DLL "libjvm.so"
51 #define JAVA_DLL "libjava.so"
52
53 #ifndef GAMMA /* launcher.make defines ARCH */
54 /*
55 * If a processor / os combination has the ability to run binaries of
56 * two data models and cohabitation of jre/jdk bits with both data
57 * models is supported, then DUAL_MODE is defined. When DUAL_MODE is
58 * defined, the architecture names for the narrow and wide version of
59 * the architecture are defined in LIBARCH64NAME and LIBARCH32NAME. Currently
60 * only Solaris on sparc/sparcv9 and i586/amd64 is DUAL_MODE; linux
61 * i586/amd64 could be defined as DUAL_MODE but that is not the
62 * current policy.
63 */
64
65 #ifndef LIBARCHNAME
66 # error "The macro LIBARCHNAME was not defined on the compile line"
67 #endif
68
69 #ifdef __sun
70 # define DUAL_MODE
71 # ifndef LIBARCH32NAME
72 # error "The macro LIBARCH32NAME was not defined on the compile line"
73 # endif
74 # ifndef LIBARCH64NAME
75 # error "The macro LIBARCH64NAME was not defined on the compile line"
76 # endif
77 # include <sys/systeminfo.h>
78 # include <sys/elf.h>
79 # include <stdio.h>
80 #endif
81
82 #endif /* ifndef GAMMA */
83
84 /* pointer to environment */
85 extern char **environ;
86
87 #ifndef GAMMA
88 /*
89 * A collection of useful strings. One should think of these as #define
90 * entries, but actual strings can be more efficient (with many compilers).
91 */
92 #ifdef __linux__
93 static const char *system_dir = "/usr/java";
94 static const char *user_dir = "/java";
95 #else /* Solaris */
96 static const char *system_dir = "/usr/jdk";
97 static const char *user_dir = "/jdk";
98 #endif
99
100 #endif /* ifndef GAMMA */
101
102 /*
103 * Flowchart of launcher execs and options processing on unix
104 *
105 * The selection of the proper vm shared library to open depends on
106 * several classes of command line options, including vm "flavor"
107 * options (-client, -server) and the data model options, -d32 and
108 * -d64, as well as a version specification which may have come from
109 * the command line or from the manifest of an executable jar file.
110 * The vm selection options are not passed to the running
111 * virtual machine; they must be screened out by the launcher.
112 *
113 * The version specification (if any) is processed first by the
114 * platform independent routine SelectVersion. This may result in
115 * the exec of the specified launcher version.
116 *
117 * Typically, the launcher execs at least once to ensure a suitable
118 * LD_LIBRARY_PATH is in effect for the process. The first exec
119 * screens out all the data model options; leaving the choice of data
120 * model implicit in the binary selected to run. However, in case no
121 * exec is done, the data model options are screened out before the vm
122 * is invoked.
123 *
124 * incoming argv ------------------------------
125 * | |
126 * \|/ |
127 * CheckJVMType |
128 * (removes -client, -server, etc.) |
129 * \|/
130 * CreateExecutionEnvironment
131 * (removes -d32 and -d64,
132 * determines desired data model,
133 * sets up LD_LIBRARY_PATH,
134 * and exec's)
135 * |
136 * --------------------------------------------
137 * |
138 * \|/
139 * exec child 1 incoming argv -----------------
140 * | |
141 * \|/ |
142 * CheckJVMType |
143 * (removes -client, -server, etc.) |
144 * | \|/
145 * | CreateExecutionEnvironment
146 * | (verifies desired data model
147 * | is running and acceptable
148 * | LD_LIBRARY_PATH;
149 * | no-op in child)
150 * |
151 * \|/
152 * TranslateDashJArgs...
153 * (Prepare to pass args to vm)
154 * |
155 * |
156 * |
157 * \|/
158 * ParseArguments
159 * (ignores -d32 and -d64,
160 * processes version options,
161 * creates argument list for vm,
162 * etc.)
163 *
164 */
165
166 static char *SetExecname(char **argv);
167 static char * GetExecname();
168 static jboolean GetJVMPath(const char *jrepath, const char *jvmtype,
169 char *jvmpath, jint jvmpathsize, char * arch);
170 static jboolean GetJREPath(char *path, jint pathsize, char * arch, jboolean speculative);
171
172 #ifndef GAMMA
173 const char *
174 GetArch()
175 {
176 return LIBARCHNAME;
177 }
178 #endif /* ifndef GAMMA */
179
180 void
181 CreateExecutionEnvironment(int *_argcp,
182 char ***_argvp,
183 char jrepath[],
184 jint so_jrepath,
185 char jvmpath[],
186 jint so_jvmpath,
187 char **original_argv) {
188 /*
189 * First, determine if we are running the desired data model. If we
190 * are running the desired data model, all the error messages
191 * associated with calling GetJREPath, ReadKnownVMs, etc. should be
192 * output. However, if we are not running the desired data model,
193 * some of the errors should be suppressed since it is more
194 * informative to issue an error message based on whether or not the
195 * os/processor combination has dual mode capabilities.
196 */
197
198 char *execname = NULL;
199 int original_argc = *_argcp;
200 jboolean jvmpathExists;
201
202 /* Compute the name of the executable */
203 execname = SetExecname(*_argvp);
204
205 #ifndef GAMMA
206 /* Set the LD_LIBRARY_PATH environment variable, check data model
207 flags, and exec process, if needed */
208 {
209 char *arch = (char *)GetArch(); /* like sparc or sparcv9 */
210 char * jvmtype = NULL;
211 int argc = *_argcp;
212 char **argv = original_argv;
213
214 char *runpath = NULL; /* existing effective LD_LIBRARY_PATH
215 setting */
216
217 int running = /* What data model is being ILP32 =>
218 32 bit vm; LP64 => 64 bit vm */
219 #ifdef _LP64
220 64;
221 #else
222 32;
223 #endif
224
225 int wanted = running; /* What data mode is being
226 asked for? Current model is
227 fine unless another model
228 is asked for */
229
230 char* new_runpath = NULL; /* desired new LD_LIBRARY_PATH string */
231 char* newpath = NULL; /* path on new LD_LIBRARY_PATH */
232 char* lastslash = NULL;
233
234 char** newenvp = NULL; /* current environment */
235
236 char** newargv = NULL;
237 int newargc = 0;
238 #ifdef __sun
239 char* dmpath = NULL; /* data model specific LD_LIBRARY_PATH,
240 Solaris only */
241 #endif
242
243 /*
244 * Starting in 1.5, all unix platforms accept the -d32 and -d64
245 * options. On platforms where only one data-model is supported
246 * (e.g. ia-64 Linux), using the flag for the other data model is
247 * an error and will terminate the program.
248 */
249
250 { /* open new scope to declare local variables */
251 int i;
252
253 newargv = (char **)JLI_MemAlloc((argc+1) * sizeof(*newargv));
254 newargv[newargc++] = argv[0];
255
256 /* scan for data model arguments and remove from argument list;
257 last occurrence determines desired data model */
258 for (i=1; i < argc; i++) {
259
260 if (strcmp(argv[i], "-J-d64") == 0 || strcmp(argv[i], "-d64") == 0) {
261 wanted = 64;
262 continue;
263 }
264 if (strcmp(argv[i], "-J-d32") == 0 || strcmp(argv[i], "-d32") == 0) {
265 wanted = 32;
266 continue;
267 }
268 newargv[newargc++] = argv[i];
269
270 #ifdef JAVA_ARGS
271 if (argv[i][0] != '-')
272 continue;
273 #else
274 if (strcmp(argv[i], "-classpath") == 0 || strcmp(argv[i], "-cp") == 0) {
275 i++;
276 if (i >= argc) break;
277 newargv[newargc++] = argv[i];
278 continue;
279 }
280 if (argv[i][0] != '-') { i++; break; }
281 #endif
282 }
283
284 /* copy rest of args [i .. argc) */
285 while (i < argc) {
286 newargv[newargc++] = argv[i++];
287 }
288 newargv[newargc] = NULL;
289
290 /*
291 * newargv has all proper arguments here
292 */
293
294 argc = newargc;
295 argv = newargv;
296 }
297
298 /* If the data model is not changing, it is an error if the
299 jvmpath does not exist */
300 if (wanted == running) {
301 /* Find out where the JRE is that we will be using. */
302 if (!GetJREPath(jrepath, so_jrepath, arch, JNI_FALSE) ) {
303 fprintf(stderr, "Error: could not find Java 2 Runtime Environment.\n");
304 exit(2);
305 }
306
307 /* Find the specified JVM type */
308 if (ReadKnownVMs(jrepath, arch, JNI_FALSE) < 1) {
309 fprintf(stderr, "Error: no known VMs. (check for corrupt jvm.cfg file)\n");
310 exit(1);
311 }
312
313 jvmpath[0] = '\0';
314 jvmtype = CheckJvmType(_argcp, _argvp, JNI_FALSE);
315
316 if (!GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath, arch )) {
317 fprintf(stderr, "Error: no `%s' JVM at `%s'.\n", jvmtype, jvmpath);
318 exit(4);
319 }
320 } else { /* do the same speculatively or exit */
321 #ifdef DUAL_MODE
322 if (running != wanted) {
323 /* Find out where the JRE is that we will be using. */
324 if (!GetJREPath(jrepath, so_jrepath, ((wanted==64)?LIBARCH64NAME:LIBARCH32NAME), JNI_TRUE)) {
325 goto EndDataModelSpeculate;
326 }
327
328 /*
329 * Read in jvm.cfg for target data model and process vm
330 * selection options.
331 */
332 if (ReadKnownVMs(jrepath, ((wanted==64)?LIBARCH64NAME:LIBARCH32NAME), JNI_TRUE) < 1) {
333 goto EndDataModelSpeculate;
334 }
335 jvmpath[0] = '\0';
336 jvmtype = CheckJvmType(_argcp, _argvp, JNI_TRUE);
337 /* exec child can do error checking on the existence of the path */
338 jvmpathExists = GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath,
339 ((wanted==64)?LIBARCH64NAME:LIBARCH32NAME));
340
341 }
342 EndDataModelSpeculate: /* give up and let other code report error message */
343 ;
344 #else
345 fprintf(stderr, "Running a %d-bit JVM is not supported on this platform.\n", wanted);
346 exit(1);
347 #endif
348 }
349
350 /*
351 * We will set the LD_LIBRARY_PATH as follows:
352 *
353 * o $JVMPATH (directory portion only)
354 * o $JRE/lib/$LIBARCHNAME
355 * o $JRE/../lib/$LIBARCHNAME
356 *
357 * followed by the user's previous effective LD_LIBRARY_PATH, if
358 * any.
359 */
360
361 #ifdef __sun
362 /*
363 * Starting in Solaris 7, ld.so.1 supports three LD_LIBRARY_PATH
364 * variables:
365 *
366 * 1. LD_LIBRARY_PATH -- used for 32 and 64 bit searches if
367 * data-model specific variables are not set.
368 *
369 * 2. LD_LIBRARY_PATH_64 -- overrides and replaces LD_LIBRARY_PATH
370 * for 64-bit binaries.
371 *
372 * 3. LD_LIBRARY_PATH_32 -- overrides and replaces LD_LIBRARY_PATH
373 * for 32-bit binaries.
374 *
375 * The vm uses LD_LIBRARY_PATH to set the java.library.path system
376 * property. To shield the vm from the complication of multiple
377 * LD_LIBRARY_PATH variables, if the appropriate data model
378 * specific variable is set, we will act as if LD_LIBRARY_PATH had
379 * the value of the data model specific variant and the data model
380 * specific variant will be unset. Note that the variable for the
381 * *wanted* data model must be used (if it is set), not simply the
382 * current running data model.
383 */
384
385 switch(wanted) {
386 case 0:
387 if(running == 32) {
388 dmpath = getenv("LD_LIBRARY_PATH_32");
389 wanted = 32;
390 }
391 else {
392 dmpath = getenv("LD_LIBRARY_PATH_64");
393 wanted = 64;
394 }
395 break;
396
397 case 32:
398 dmpath = getenv("LD_LIBRARY_PATH_32");
399 break;
400
401 case 64:
402 dmpath = getenv("LD_LIBRARY_PATH_64");
403 break;
404
405 default:
406 fprintf(stderr, "Improper value at line %d.", __LINE__);
407 exit(1); /* unknown value in wanted */
408 break;
409 }
410
411 /*
412 * If dmpath is NULL, the relevant data model specific variable is
413 * not set and normal LD_LIBRARY_PATH should be used.
414 */
415 if( dmpath == NULL) {
416 runpath = getenv("LD_LIBRARY_PATH");
417 }
418 else {
419 runpath = dmpath;
420 }
421 #else
422 /*
423 * If not on Solaris, assume only a single LD_LIBRARY_PATH
424 * variable.
425 */
426 runpath = getenv("LD_LIBRARY_PATH");
427 #endif /* __sun */
428
429 #ifdef __linux
430 /*
431 * On linux, if a binary is running as sgid or suid, glibc sets
432 * LD_LIBRARY_PATH to the empty string for security purposes. (In
433 * contrast, on Solaris the LD_LIBRARY_PATH variable for a
434 * privileged binary does not lose its settings; but the dynamic
435 * linker does apply more scrutiny to the path.) The launcher uses
436 * the value of LD_LIBRARY_PATH to prevent an exec loop.
437 * Therefore, if we are running sgid or suid, this function's
438 * setting of LD_LIBRARY_PATH will be ineffective and we should
439 * return from the function now. Getting the right libraries to
440 * be found must be handled through other mechanisms.
441 */
442 if((getgid() != getegid()) || (getuid() != geteuid()) ) {
443 return;
444 }
445 #endif
446
447 /* runpath contains current effective LD_LIBRARY_PATH setting */
448
449 jvmpath = JLI_StringDup(jvmpath);
450 new_runpath = JLI_MemAlloc( ((runpath!=NULL)?strlen(runpath):0) +
451 2*strlen(jrepath) + 2*strlen(arch) +
452 strlen(jvmpath) + 52);
453 newpath = new_runpath + strlen("LD_LIBRARY_PATH=");
454
455
456 /*
457 * Create desired LD_LIBRARY_PATH value for target data model.
458 */
459 {
460 /* remove the name of the .so from the JVM path */
461 lastslash = strrchr(jvmpath, '/');
462 if (lastslash)
463 *lastslash = '\0';
464
465
466 /* jvmpath, ((running != wanted)?((wanted==64)?"/"LIBARCH64NAME:"/.."):""), */
467
468 sprintf(new_runpath, "LD_LIBRARY_PATH="
469 "%s:"
470 "%s/lib/%s:"
471 "%s/../lib/%s",
472 jvmpath,
473 #ifdef DUAL_MODE
474 jrepath, ((wanted==64)?LIBARCH64NAME:LIBARCH32NAME),
475 jrepath, ((wanted==64)?LIBARCH64NAME:LIBARCH32NAME)
476 #else
477 jrepath, arch,
478 jrepath, arch
479 #endif
480 );
481
482
483 /*
484 * Check to make sure that the prefix of the current path is the
485 * desired environment variable setting.
486 */
487 if (runpath != NULL &&
488 strncmp(newpath, runpath, strlen(newpath))==0 &&
489 (runpath[strlen(newpath)] == 0 || runpath[strlen(newpath)] == ':') &&
490 (running == wanted) /* data model does not have to be changed */
491 #ifdef __sun
492 && (dmpath == NULL) /* data model specific variables not set */
493 #endif
494 ) {
495
496 return;
497
498 }
499 }
500
501 /*
502 * Place the desired environment setting onto the prefix of
503 * LD_LIBRARY_PATH. Note that this prevents any possible infinite
504 * loop of execv() because we test for the prefix, above.
505 */
506 if (runpath != 0) {
507 strcat(new_runpath, ":");
508 strcat(new_runpath, runpath);
509 }
510
511 if( putenv(new_runpath) != 0) {
512 exit(1); /* problem allocating memory; LD_LIBRARY_PATH not set
513 properly */
514 }
515
516 /*
517 * Unix systems document that they look at LD_LIBRARY_PATH only
518 * once at startup, so we have to re-exec the current executable
519 * to get the changed environment variable to have an effect.
520 */
521
522 #ifdef __sun
523 /*
524 * If dmpath is not NULL, remove the data model specific string
525 * in the environment for the exec'ed child.
526 */
527
528 if( dmpath != NULL)
529 (void)UnsetEnv((wanted==32)?"LD_LIBRARY_PATH_32":"LD_LIBRARY_PATH_64");
530 #endif
531
532 newenvp = environ;
533
534 {
535 char *newexec = execname;
536 #ifdef DUAL_MODE
537 /*
538 * If the data model is being changed, the path to the
539 * executable must be updated accordingly; the executable name
540 * and directory the executable resides in are separate. In the
541 * case of 32 => 64, the new bits are assumed to reside in, e.g.
542 * "olddir/LIBARCH64NAME/execname"; in the case of 64 => 32,
543 * the bits are assumed to be in "olddir/../execname". For example,
544 *
545 * olddir/sparcv9/execname
546 * olddir/amd64/execname
547 *
548 * for Solaris SPARC and Linux amd64, respectively.
549 */
550
551 if (running != wanted) {
552 char *oldexec = strcpy(JLI_MemAlloc(strlen(execname) + 1), execname);
553 char *olddir = oldexec;
554 char *oldbase = strrchr(oldexec, '/');
555
556
557 newexec = JLI_MemAlloc(strlen(execname) + 20);
558 *oldbase++ = 0;
559 sprintf(newexec, "%s/%s/%s", olddir,
560 ((wanted==64) ? LIBARCH64NAME : ".."), oldbase);
561 argv[0] = newexec;
562 }
563 #endif
564
565 (void)fflush(stdout);
566 (void)fflush(stderr);
567 execve(newexec, argv, newenvp);
568 perror("execve()");
569
570 fprintf(stderr, "Error trying to exec %s.\n", newexec);
571 fprintf(stderr, "Check if file exists and permissions are set correctly.\n");
572
573 #ifdef DUAL_MODE
574 if (running != wanted) {
575 fprintf(stderr, "Failed to start a %d-bit JVM process from a %d-bit JVM.\n",
576 wanted, running);
577 # ifdef __sun
578
579 # ifdef __sparc
580 fprintf(stderr, "Verify all necessary J2SE components have been installed.\n" );
581 fprintf(stderr,
582 "(Solaris SPARC 64-bit components must be installed after 32-bit components.)\n" );
583 # else
584 fprintf(stderr, "Either 64-bit processes are not supported by this platform\n");
585 fprintf(stderr, "or the 64-bit components have not been installed.\n");
586 # endif
587 }
588 # endif
589 #endif
590
591 }
592
593 exit(1);
594 }
595
596 #else /* ifndef GAMMA */
597
598 /*
599 * gamma launcher is simpler in that it doesn't handle VM flavors, data
600 * model, LD_LIBRARY_PATH, etc. Assuming everything is set-up correctly
601 * all we need to do here is to return correct path names. See also
602 * GetJVMPath() and GetApplicationHome().
603 */
604
605 { char *arch = (char *) ARCH; /* like sparc or sparcv9 */
606 char *p;
607
608 if (!GetJREPath(jrepath, so_jrepath, arch, JNI_FALSE) ) {
609 fprintf(stderr, "Error: could not find Java 2 Runtime Environment.\n");
610 exit(2);
611 }
612
613 if (!GetJVMPath(jrepath, NULL, jvmpath, so_jvmpath, arch )) {
614 fprintf(stderr, "Error: no JVM at `%s'.\n", jvmpath);
615 exit(4);
616 }
617 }
618
619 #endif /* ifndef GAMMA */
620 }
621
622
623 /*
624 * On Solaris VM choosing is done by the launcher (java.c).
625 */
626 static jboolean
627 GetJVMPath(const char *jrepath, const char *jvmtype,
628 char *jvmpath, jint jvmpathsize, char * arch)
629 {
630 struct stat s;
631
632 #ifndef GAMMA
633 if (strchr(jvmtype, '/')) {
634 sprintf(jvmpath, "%s/" JVM_DLL, jvmtype);
635 } else {
636 sprintf(jvmpath, "%s/lib/%s/%s/" JVM_DLL, jrepath, arch, jvmtype);
637 }
638 #else
639 /*
640 * For gamma launcher, JVM is either built-in or in the same directory.
641 * Either way we return "<exe_path>/libjvm.so" where <exe_path> is the
642 * directory where gamma launcher is located.
643 */
644
645 char *p;
646
647 snprintf(jvmpath, jvmpathsize, "%s", GetExecname());
648 p = strrchr(jvmpath, '/');
649 if (p) {
650 /* replace executable name with libjvm.so */
651 snprintf(p + 1, jvmpathsize - (p + 1 - jvmpath), "%s", JVM_DLL);
652 } else {
653 /* this case shouldn't happen */
654 snprintf(jvmpath, jvmpathsize, "%s", JVM_DLL);
655 }
656 #endif /* ifndef GAMMA */
657
658 if (_launcher_debug)
659 printf("Does `%s' exist ... ", jvmpath);
660
661 if (stat(jvmpath, &s) == 0) {
662 if (_launcher_debug)
663 printf("yes.\n");
664 return JNI_TRUE;
665 } else {
666 if (_launcher_debug)
667 printf("no.\n");
668 return JNI_FALSE;
669 }
670 }
671
672 /*
673 * Find path to JRE based on .exe's location or registry settings.
674 */
675 static jboolean
676 GetJREPath(char *path, jint pathsize, char * arch, jboolean speculative)
677 {
678 char libjava[MAXPATHLEN];
679
680 if (GetApplicationHome(path, pathsize)) {
681 /* Is JRE co-located with the application? */
682 sprintf(libjava, "%s/lib/%s/" JAVA_DLL, path, arch);
683 if (access(libjava, F_OK) == 0) {
684 goto found;
685 }
686
687 /* Does the app ship a private JRE in <apphome>/jre directory? */
688 sprintf(libjava, "%s/jre/lib/%s/" JAVA_DLL, path, arch);
689 if (access(libjava, F_OK) == 0) {
690 strcat(path, "/jre");
691 goto found;
692 }
693 }
694
695 if (!speculative)
696 fprintf(stderr, "Error: could not find " JAVA_DLL "\n");
697 return JNI_FALSE;
698
699 found:
700 if (_launcher_debug)
701 printf("JRE path is %s\n", path);
702 return JNI_TRUE;
703 }
704
705 jboolean
706 LoadJavaVM(const char *jvmpath, InvocationFunctions *ifn)
707 {
708 #ifdef GAMMA
709 /* JVM is directly linked with gamma launcher; no dlopen() */
710 ifn->CreateJavaVM = JNI_CreateJavaVM;
711 ifn->GetDefaultJavaVMInitArgs = JNI_GetDefaultJavaVMInitArgs;
712 return JNI_TRUE;
713 #else
714 Dl_info dlinfo;
715 void *libjvm;
716
717 if (_launcher_debug) {
718 printf("JVM path is %s\n", jvmpath);
719 }
720
721 libjvm = dlopen(jvmpath, RTLD_NOW + RTLD_GLOBAL);
722 if (libjvm == NULL) {
723 #if defined(__sparc) && !defined(_LP64) /* i.e. 32-bit sparc */
724 FILE * fp;
725 Elf32_Ehdr elf_head;
726 int count;
727 int location;
728
729 fp = fopen(jvmpath, "r");
730 if(fp == NULL)
731 goto error;
732
733 /* read in elf header */
734 count = fread((void*)(&elf_head), sizeof(Elf32_Ehdr), 1, fp);
735 fclose(fp);
736 if(count < 1)
737 goto error;
738
739 /*
740 * Check for running a server vm (compiled with -xarch=v8plus)
741 * on a stock v8 processor. In this case, the machine type in
742 * the elf header would not be included the architecture list
743 * provided by the isalist command, which is turn is gotten from
744 * sysinfo. This case cannot occur on 64-bit hardware and thus
745 * does not have to be checked for in binaries with an LP64 data
746 * model.
747 */
748 if(elf_head.e_machine == EM_SPARC32PLUS) {
749 char buf[257]; /* recommended buffer size from sysinfo man
750 page */
751 long length;
752 char* location;
753
754 length = sysinfo(SI_ISALIST, buf, 257);
755 if(length > 0) {
756 location = strstr(buf, "sparcv8plus ");
757 if(location == NULL) {
758 fprintf(stderr, "SPARC V8 processor detected; Server compiler requires V9 or better.\n");
759 fprintf(stderr, "Use Client compiler on V8 processors.\n");
760 fprintf(stderr, "Could not create the Java virtual machine.\n");
761 return JNI_FALSE;
762 }
763 }
764 }
765 #endif
766 fprintf(stderr, "dl failure on line %d", __LINE__);
767 goto error;
768 }
769
770 ifn->CreateJavaVM = (CreateJavaVM_t)
771 dlsym(libjvm, "JNI_CreateJavaVM");
772 if (ifn->CreateJavaVM == NULL)
773 goto error;
774
775 ifn->GetDefaultJavaVMInitArgs = (GetDefaultJavaVMInitArgs_t)
776 dlsym(libjvm, "JNI_GetDefaultJavaVMInitArgs");
777 if (ifn->GetDefaultJavaVMInitArgs == NULL)
778 goto error;
779
780 return JNI_TRUE;
781
782 error:
783 fprintf(stderr, "Error: failed %s, because %s\n", jvmpath, dlerror());
784 return JNI_FALSE;
785 #endif /* ifndef GAMMA */
786 }
787
788 /*
789 * If app is "/foo/bin/javac", or "/foo/bin/sparcv9/javac" then put
790 * "/foo" into buf.
791 */
792 jboolean
793 GetApplicationHome(char *buf, jint bufsize)
794 {
795 #ifdef __linux__
796 char *execname = GetExecname();
797 if (execname) {
798 strncpy(buf, execname, bufsize-1);
799 buf[bufsize-1] = '\0';
800 } else {
801 return JNI_FALSE;
802 }
803 #else
804 Dl_info dlinfo;
805
806 dladdr((void *)GetApplicationHome, &dlinfo);
807 if (realpath(dlinfo.dli_fname, buf) == NULL) {
808 fprintf(stderr, "Error: realpath(`%s') failed.\n", dlinfo.dli_fname);
809 return JNI_FALSE;
810 }
811 #endif
812
813 #ifdef GAMMA
814 {
815 /* gamma launcher uses JAVA_HOME or ALT_JAVA_HOME environment variable to find JDK/JRE */
816 char* java_home_var = getenv("ALT_JAVA_HOME");
817 if (java_home_var == NULL) {
818 java_home_var = getenv("JAVA_HOME");
819 }
820 if (java_home_var == NULL) {
821 printf("JAVA_HOME or ALT_JAVA_HOME must point to a valid JDK/JRE to run gamma\n");
822 return JNI_FALSE;
823 }
824 snprintf(buf, bufsize, "%s", java_home_var);
825 }
826 #else
827 if (strrchr(buf, '/') == 0) {
828 buf[0] = '\0';
829 return JNI_FALSE;
830 }
831 *(strrchr(buf, '/')) = '\0'; /* executable file */
832 if (strlen(buf) < 4 || strrchr(buf, '/') == 0) {
833 buf[0] = '\0';
834 return JNI_FALSE;
835 }
836 if (strcmp("/bin", buf + strlen(buf) - 4) != 0)
837 *(strrchr(buf, '/')) = '\0'; /* sparcv9 or amd64 */
838 if (strlen(buf) < 4 || strcmp("/bin", buf + strlen(buf) - 4) != 0) {
839 buf[0] = '\0';
840 return JNI_FALSE;
841 }
842 *(strrchr(buf, '/')) = '\0'; /* bin */
843 #endif /* ifndef GAMMA */
844
845 return JNI_TRUE;
846 }
847
848
849 /*
850 * Return true if the named program exists
851 */
852 static int
853 ProgramExists(char *name)
854 {
855 struct stat sb;
856 if (stat(name, &sb) != 0) return 0;
857 if (S_ISDIR(sb.st_mode)) return 0;
858 return (sb.st_mode & S_IEXEC) != 0;
859 }
860
861
862 /*
863 * Find a command in a directory, returning the path.
864 */
865 static char *
866 Resolve(char *indir, char *cmd)
867 {
868 char name[PATH_MAX + 2], *real;
869
870 if ((strlen(indir) + strlen(cmd) + 1) > PATH_MAX) return 0;
871 sprintf(name, "%s%c%s", indir, FILE_SEPARATOR, cmd);
872 if (!ProgramExists(name)) return 0;
873 real = JLI_MemAlloc(PATH_MAX + 2);
874 if (!realpath(name, real))
875 strcpy(real, name);
876 return real;
877 }
878
879
880 /*
881 * Find a path for the executable
882 */
883 static char *
884 FindExecName(char *program)
885 {
886 char cwdbuf[PATH_MAX+2];
887 char *path;
888 char *tmp_path;
889 char *f;
890 char *result = NULL;
891
892 /* absolute path? */
893 if (*program == FILE_SEPARATOR ||
894 (FILE_SEPARATOR=='\\' && strrchr(program, ':')))
895 return Resolve("", program+1);
896
897 /* relative path? */
898 if (strrchr(program, FILE_SEPARATOR) != 0) {
899 char buf[PATH_MAX+2];
900 return Resolve(getcwd(cwdbuf, sizeof(cwdbuf)), program);
901 }
902
903 /* from search path? */
904 path = getenv("PATH");
905 if (!path || !*path) path = ".";
906 tmp_path = JLI_MemAlloc(strlen(path) + 2);
907 strcpy(tmp_path, path);
908
909 for (f=tmp_path; *f && result==0; ) {
910 char *s = f;
911 while (*f && (*f != PATH_SEPARATOR)) ++f;
912 if (*f) *f++ = 0;
913 if (*s == FILE_SEPARATOR)
914 result = Resolve(s, program);
915 else {
916 /* relative path element */
917 char dir[2*PATH_MAX];
918 sprintf(dir, "%s%c%s", getcwd(cwdbuf, sizeof(cwdbuf)),
919 FILE_SEPARATOR, s);
920 result = Resolve(dir, program);
921 }
922 if (result != 0) break;
923 }
924
925 JLI_MemFree(tmp_path);
926 return result;
927 }
928
929
930 /* Store the name of the executable once computed */
931 static char *execname = NULL;
932
933 /*
934 * Compute the name of the executable
935 *
936 * In order to re-exec securely we need the absolute path of the
937 * executable. On Solaris getexecname(3c) may not return an absolute
938 * path so we use dladdr to get the filename of the executable and
939 * then use realpath to derive an absolute path. From Solaris 9
940 * onwards the filename returned in DL_info structure from dladdr is
941 * an absolute pathname so technically realpath isn't required.
942 * On Linux we read the executable name from /proc/self/exe.
943 * As a fallback, and for platforms other than Solaris and Linux,
944 * we use FindExecName to compute the executable name.
945 */
946 static char *
947 SetExecname(char **argv)
948 {
949 char* exec_path = NULL;
950
951 if (execname != NULL) /* Already determined */
952 return (execname);
953
954 #if defined(__sun)
955 {
956 Dl_info dlinfo;
957 if (dladdr((void*)&SetExecname, &dlinfo)) {
958 char *resolved = (char*)JLI_MemAlloc(PATH_MAX+1);
959 if (resolved != NULL) {
960 exec_path = realpath(dlinfo.dli_fname, resolved);
961 if (exec_path == NULL) {
962 JLI_MemFree(resolved);
963 }
964 }
965 }
966 }
967 #elif defined(__linux__)
968 {
969 const char* self = "/proc/self/exe";
970 char buf[PATH_MAX+1];
971 int len = readlink(self, buf, PATH_MAX);
972 if (len >= 0) {
973 buf[len] = '\0'; /* readlink doesn't nul terminate */
974 exec_path = JLI_StringDup(buf);
975 }
976 }
977 #else /* !__sun && !__linux */
978 {
979 /* Not implemented */
980 }
981 #endif
982
983 if (exec_path == NULL) {
984 exec_path = FindExecName(argv[0]);
985 }
986 execname = exec_path;
987 return exec_path;
988 }
989
990 /*
991 * Return the name of the executable. Used in java_md.c to find the JRE area.
992 */
993 static char *
994 GetExecname() {
995 return execname;
996 }
997
998 void ReportErrorMessage(char * message, jboolean always) {
999 if (always) {
1000 fprintf(stderr, "%s\n", message);
1001 }
1002 }
1003
1004 void ReportErrorMessage2(char * format, char * string, jboolean always) {
1005 if (always) {
1006 fprintf(stderr, format, string);
1007 fprintf(stderr, "\n");
1008 }
1009 }
1010
1011 void ReportExceptionDescription(JNIEnv * env) {
1012 (*env)->ExceptionDescribe(env);
1013 }
1014
1015 /*
1016 * Return JNI_TRUE for an option string that has no effect but should
1017 * _not_ be passed on to the vm; return JNI_FALSE otherwise. On
1018 * Solaris SPARC, this screening needs to be done if:
1019 * 1) LD_LIBRARY_PATH does _not_ need to be reset and
1020 * 2) -d32 or -d64 is passed to a binary with a matching data model
1021 * (the exec in SetLibraryPath removes -d<n> options and points the
1022 * exec to the proper binary). When this exec is not done, these options
1023 * would end up getting passed onto the vm.
1024 */
1025 jboolean RemovableMachineDependentOption(char * option) {
1026 /*
1027 * Unconditionally remove both -d32 and -d64 options since only
1028 * the last such options has an effect; e.g.
1029 * java -d32 -d64 -d32 -version
1030 * is equivalent to
1031 * java -d32 -version
1032 */
1033
1034 if( (strcmp(option, "-d32") == 0 ) ||
1035 (strcmp(option, "-d64") == 0 ))
1036 return JNI_TRUE;
1037 else
1038 return JNI_FALSE;
1039 }
1040
1041 void PrintMachineDependentOptions() {
1042 fprintf(stdout,
1043 " -d32 use a 32-bit data model if available\n"
1044 "\n"
1045 " -d64 use a 64-bit data model if available\n");
1046 return;
1047 }
1048
1049 #ifndef GAMMA
1050 /*
1051 * The following methods (down to ServerClassMachine()) answer
1052 * the question about whether a machine is a "server-class"
1053 * machine. A server-class machine is loosely defined as one
1054 * with 2 or more processors and 2 gigabytes or more physical
1055 * memory. The definition of a processor is a physical package,
1056 * not a hyperthreaded chip masquerading as a multi-processor.
1057 * The definition of memory is also somewhat fuzzy, since x86
1058 * machines seem not to report all the memory in their DIMMs, we
1059 * think because of memory mapping of graphics cards, etc.
1060 *
1061 * This code is somewhat more confused with #ifdef's than we'd
1062 * like because this file is used by both Solaris and Linux
1063 * platforms, and so needs to be parameterized for SPARC and
1064 * i586 hardware. The other Linux platforms (amd64 and ia64)
1065 * don't even ask this question, because they only come with
1066 * server JVMs. */
1067
1068 # define KB (1024UL)
1069 # define MB (1024UL * KB)
1070 # define GB (1024UL * MB)
1071
1072 /* Compute physical memory by asking the OS */
1073 uint64_t
1074 physical_memory(void) {
1075 const uint64_t pages = (uint64_t) sysconf(_SC_PHYS_PAGES);
1076 const uint64_t page_size = (uint64_t) sysconf(_SC_PAGESIZE);
1077 const uint64_t result = pages * page_size;
1078 # define UINT64_FORMAT "%" PRIu64
1079
1080 if (_launcher_debug) {
1081 printf("pages: " UINT64_FORMAT
1082 " page_size: " UINT64_FORMAT
1083 " physical memory: " UINT64_FORMAT " (%.3fGB)\n",
1084 pages, page_size, result, result / (double) GB);
1085 }
1086 return result;
1087 }
1088
1089 #if defined(__sun) && defined(__sparc)
1090
1091 /* Methods for solaris-sparc: these are easy. */
1092
1093 /* Ask the OS how many processors there are. */
1094 unsigned long
1095 physical_processors(void) {
1096 const unsigned long sys_processors = sysconf(_SC_NPROCESSORS_CONF);
1097
1098 if (_launcher_debug) {
1099 printf("sysconf(_SC_NPROCESSORS_CONF): %lu\n", sys_processors);
1100 }
1101 return sys_processors;
1102 }
1103
1104 /* The solaris-sparc version of the "server-class" predicate. */
1105 jboolean
1106 solaris_sparc_ServerClassMachine(void) {
1107 jboolean result = JNI_FALSE;
1108 /* How big is a server class machine? */
1109 const unsigned long server_processors = 2UL;
1110 const uint64_t server_memory = 2UL * GB;
1111 const uint64_t actual_memory = physical_memory();
1112
1113 /* Is this a server class machine? */
1114 if (actual_memory >= server_memory) {
1115 const unsigned long actual_processors = physical_processors();
1116 if (actual_processors >= server_processors) {
1117 result = JNI_TRUE;
1118 }
1119 }
1120 if (_launcher_debug) {
1121 printf("solaris_" LIBARCHNAME "_ServerClassMachine: %s\n",
1122 (result == JNI_TRUE ? "JNI_TRUE" : "JNI_FALSE"));
1123 }
1124 return result;
1125 }
1126
1127 #endif /* __sun && __sparc */
1128
1129 #if defined(__sun) && defined(i586)
1130
1131 /*
1132 * A utility method for asking the CPU about itself.
1133 * There's a corresponding version of linux-i586
1134 * because the compilers are different.
1135 */
1136 void
1137 get_cpuid(uint32_t arg,
1138 uint32_t* eaxp,
1139 uint32_t* ebxp,
1140 uint32_t* ecxp,
1141 uint32_t* edxp) {
1142 #ifdef _LP64
1143 asm(
1144 /* rbx is a callee-saved register */
1145 " movq %rbx, %r11 \n"
1146 /* rdx and rcx are 3rd and 4th argument registers */
1147 " movq %rdx, %r10 \n"
1148 " movq %rcx, %r9 \n"
1149 " movl %edi, %eax \n"
1150 " cpuid \n"
1151 " movl %eax, (%rsi)\n"
1152 " movl %ebx, (%r10)\n"
1153 " movl %ecx, (%r9) \n"
1154 " movl %edx, (%r8) \n"
1155 /* Restore rbx */
1156 " movq %r11, %rbx");
1157 #else
1158 /* EBX is a callee-saved register */
1159 asm(" pushl %ebx");
1160 /* Need ESI for storing through arguments */
1161 asm(" pushl %esi");
1162 asm(" movl 8(%ebp), %eax \n"
1163 " cpuid \n"
1164 " movl 12(%ebp), %esi \n"
1165 " movl %eax, (%esi) \n"
1166 " movl 16(%ebp), %esi \n"
1167 " movl %ebx, (%esi) \n"
1168 " movl 20(%ebp), %esi \n"
1169 " movl %ecx, (%esi) \n"
1170 " movl 24(%ebp), %esi \n"
1171 " movl %edx, (%esi) ");
1172 /* Restore ESI and EBX */
1173 asm(" popl %esi");
1174 /* Restore EBX */
1175 asm(" popl %ebx");
1176 #endif
1177 }
1178
1179 #endif /* __sun && i586 */
1180
1181 #if defined(__linux__) && defined(i586)
1182
1183 /*
1184 * A utility method for asking the CPU about itself.
1185 * There's a corresponding version of solaris-i586
1186 * because the compilers are different.
1187 */
1188 void
1189 get_cpuid(uint32_t arg,
1190 uint32_t* eaxp,
1191 uint32_t* ebxp,
1192 uint32_t* ecxp,
1193 uint32_t* edxp) {
1194 #ifdef _LP64
1195 __asm__ volatile (/* Instructions */
1196 " movl %4, %%eax \n"
1197 " cpuid \n"
1198 " movl %%eax, (%0)\n"
1199 " movl %%ebx, (%1)\n"
1200 " movl %%ecx, (%2)\n"
1201 " movl %%edx, (%3)\n"
1202 : /* Outputs */
1203 : /* Inputs */
1204 "r" (eaxp),
1205 "r" (ebxp),
1206 "r" (ecxp),
1207 "r" (edxp),
1208 "r" (arg)
1209 : /* Clobbers */
1210 "%rax", "%rbx", "%rcx", "%rdx", "memory"
1211 );
1212 #else
1213 uint32_t value_of_eax = 0;
1214 uint32_t value_of_ebx = 0;
1215 uint32_t value_of_ecx = 0;
1216 uint32_t value_of_edx = 0;
1217 __asm__ volatile (/* Instructions */
1218 /* ebx is callee-save, so push it */
1219 " pushl %%ebx \n"
1220 " movl %4, %%eax \n"
1221 " cpuid \n"
1222 " movl %%eax, %0 \n"
1223 " movl %%ebx, %1 \n"
1224 " movl %%ecx, %2 \n"
1225 " movl %%edx, %3 \n"
1226 /* restore ebx */
1227 " popl %%ebx \n"
1228
1229 : /* Outputs */
1230 "=m" (value_of_eax),
1231 "=m" (value_of_ebx),
1232 "=m" (value_of_ecx),
1233 "=m" (value_of_edx)
1234 : /* Inputs */
1235 "m" (arg)
1236 : /* Clobbers */
1237 "%eax", "%ecx", "%edx"
1238 );
1239 *eaxp = value_of_eax;
1240 *ebxp = value_of_ebx;
1241 *ecxp = value_of_ecx;
1242 *edxp = value_of_edx;
1243 #endif
1244 }
1245
1246 #endif /* __linux__ && i586 */
1247
1248 #ifdef i586
1249 /*
1250 * Routines shared by solaris-i586 and linux-i586.
1251 */
1252
1253 enum HyperThreadingSupport_enum {
1254 hts_supported = 1,
1255 hts_too_soon_to_tell = 0,
1256 hts_not_supported = -1,
1257 hts_not_pentium4 = -2,
1258 hts_not_intel = -3
1259 };
1260 typedef enum HyperThreadingSupport_enum HyperThreadingSupport;
1261
1262 /* Determine if hyperthreading is supported */
1263 HyperThreadingSupport
1264 hyperthreading_support(void) {
1265 HyperThreadingSupport result = hts_too_soon_to_tell;
1266 /* Bits 11 through 8 is family processor id */
1267 # define FAMILY_ID_SHIFT 8
1268 # define FAMILY_ID_MASK 0xf
1269 /* Bits 23 through 20 is extended family processor id */
1270 # define EXT_FAMILY_ID_SHIFT 20
1271 # define EXT_FAMILY_ID_MASK 0xf
1272 /* Pentium 4 family processor id */
1273 # define PENTIUM4_FAMILY_ID 0xf
1274 /* Bit 28 indicates Hyper-Threading Technology support */
1275 # define HT_BIT_SHIFT 28
1276 # define HT_BIT_MASK 1
1277 uint32_t vendor_id[3] = { 0U, 0U, 0U };
1278 uint32_t value_of_eax = 0U;
1279 uint32_t value_of_edx = 0U;
1280 uint32_t dummy = 0U;
1281
1282 /* Yes, this is supposed to be [0], [2], [1] */
1283 get_cpuid(0, &dummy, &vendor_id[0], &vendor_id[2], &vendor_id[1]);
1284 if (_launcher_debug) {
1285 printf("vendor: %c %c %c %c %c %c %c %c %c %c %c %c \n",
1286 ((vendor_id[0] >> 0) & 0xff),
1287 ((vendor_id[0] >> 8) & 0xff),
1288 ((vendor_id[0] >> 16) & 0xff),
1289 ((vendor_id[0] >> 24) & 0xff),
1290 ((vendor_id[1] >> 0) & 0xff),
1291 ((vendor_id[1] >> 8) & 0xff),
1292 ((vendor_id[1] >> 16) & 0xff),
1293 ((vendor_id[1] >> 24) & 0xff),
1294 ((vendor_id[2] >> 0) & 0xff),
1295 ((vendor_id[2] >> 8) & 0xff),
1296 ((vendor_id[2] >> 16) & 0xff),
1297 ((vendor_id[2] >> 24) & 0xff));
1298 }
1299 get_cpuid(1, &value_of_eax, &dummy, &dummy, &value_of_edx);
1300 if (_launcher_debug) {
1301 printf("value_of_eax: 0x%x value_of_edx: 0x%x\n",
1302 value_of_eax, value_of_edx);
1303 }
1304 if ((((value_of_eax >> FAMILY_ID_SHIFT) & FAMILY_ID_MASK) == PENTIUM4_FAMILY_ID) ||
1305 (((value_of_eax >> EXT_FAMILY_ID_SHIFT) & EXT_FAMILY_ID_MASK) != 0)) {
1306 if ((((vendor_id[0] >> 0) & 0xff) == 'G') &&
1307 (((vendor_id[0] >> 8) & 0xff) == 'e') &&
1308 (((vendor_id[0] >> 16) & 0xff) == 'n') &&
1309 (((vendor_id[0] >> 24) & 0xff) == 'u') &&
1310 (((vendor_id[1] >> 0) & 0xff) == 'i') &&
1311 (((vendor_id[1] >> 8) & 0xff) == 'n') &&
1312 (((vendor_id[1] >> 16) & 0xff) == 'e') &&
1313 (((vendor_id[1] >> 24) & 0xff) == 'I') &&
1314 (((vendor_id[2] >> 0) & 0xff) == 'n') &&
1315 (((vendor_id[2] >> 8) & 0xff) == 't') &&
1316 (((vendor_id[2] >> 16) & 0xff) == 'e') &&
1317 (((vendor_id[2] >> 24) & 0xff) == 'l')) {
1318 if (((value_of_edx >> HT_BIT_SHIFT) & HT_BIT_MASK) == HT_BIT_MASK) {
1319 if (_launcher_debug) {
1320 printf("Hyperthreading supported\n");
1321 }
1322 result = hts_supported;
1323 } else {
1324 if (_launcher_debug) {
1325 printf("Hyperthreading not supported\n");
1326 }
1327 result = hts_not_supported;
1328 }
1329 } else {
1330 if (_launcher_debug) {
1331 printf("Not GenuineIntel\n");
1332 }
1333 result = hts_not_intel;
1334 }
1335 } else {
1336 if (_launcher_debug) {
1337 printf("not Pentium 4 or extended\n");
1338 }
1339 result = hts_not_pentium4;
1340 }
1341 return result;
1342 }
1343
1344 /* Determine how many logical processors there are per CPU */
1345 unsigned int
1346 logical_processors_per_package(void) {
1347 /*
1348 * After CPUID with EAX==1, register EBX bits 23 through 16
1349 * indicate the number of logical processors per package
1350 */
1351 # define NUM_LOGICAL_SHIFT 16
1352 # define NUM_LOGICAL_MASK 0xff
1353 unsigned int result = 1U;
1354 const HyperThreadingSupport hyperthreading = hyperthreading_support();
1355
1356 if (hyperthreading == hts_supported) {
1357 uint32_t value_of_ebx = 0U;
1358 uint32_t dummy = 0U;
1359
1360 get_cpuid(1, &dummy, &value_of_ebx, &dummy, &dummy);
1361 result = (value_of_ebx >> NUM_LOGICAL_SHIFT) & NUM_LOGICAL_MASK;
1362 if (_launcher_debug) {
1363 printf("logical processors per package: %u\n", result);
1364 }
1365 }
1366 return result;
1367 }
1368
1369 /* Compute the number of physical processors, not logical processors */
1370 unsigned long
1371 physical_processors(void) {
1372 const long sys_processors = sysconf(_SC_NPROCESSORS_CONF);
1373 unsigned long result = sys_processors;
1374
1375 if (_launcher_debug) {
1376 printf("sysconf(_SC_NPROCESSORS_CONF): %lu\n", sys_processors);
1377 }
1378 if (sys_processors > 1) {
1379 unsigned int logical_processors = logical_processors_per_package();
1380 if (logical_processors > 1) {
1381 result = (unsigned long) sys_processors / logical_processors;
1382 }
1383 }
1384 if (_launcher_debug) {
1385 printf("physical processors: %lu\n", result);
1386 }
1387 return result;
1388 }
1389
1390 #endif /* i586 */
1391
1392 #if defined(__sun) && defined(i586)
1393
1394 /* The definition of a server-class machine for solaris-i586/amd64 */
1395 jboolean
1396 solaris_i586_ServerClassMachine(void) {
1397 jboolean result = JNI_FALSE;
1398 /* How big is a server class machine? */
1399 const unsigned long server_processors = 2UL;
1400 const uint64_t server_memory = 2UL * GB;
1401 /*
1402 * We seem not to get our full complement of memory.
1403 * We allow some part (1/8?) of the memory to be "missing",
1404 * based on the sizes of DIMMs, and maybe graphics cards.
1405 */
1406 const uint64_t missing_memory = 256UL * MB;
1407 const uint64_t actual_memory = physical_memory();
1408
1409 /* Is this a server class machine? */
1410 if (actual_memory >= (server_memory - missing_memory)) {
1411 const unsigned long actual_processors = physical_processors();
1412 if (actual_processors >= server_processors) {
1413 result = JNI_TRUE;
1414 }
1415 }
1416 if (_launcher_debug) {
1417 printf("solaris_" LIBARCHNAME "_ServerClassMachine: %s\n",
1418 (result == JNI_TRUE ? "true" : "false"));
1419 }
1420 return result;
1421 }
1422
1423 #endif /* __sun && i586 */
1424
1425 #if defined(__linux__) && defined(i586)
1426
1427 /* The definition of a server-class machine for linux-i586 */
1428 jboolean
1429 linux_i586_ServerClassMachine(void) {
1430 jboolean result = JNI_FALSE;
1431 /* How big is a server class machine? */
1432 const unsigned long server_processors = 2UL;
1433 const uint64_t server_memory = 2UL * GB;
1434 /*
1435 * We seem not to get our full complement of memory.
1436 * We allow some part (1/8?) of the memory to be "missing",
1437 * based on the sizes of DIMMs, and maybe graphics cards.
1438 */
1439 const uint64_t missing_memory = 256UL * MB;
1440 const uint64_t actual_memory = physical_memory();
1441
1442 /* Is this a server class machine? */
1443 if (actual_memory >= (server_memory - missing_memory)) {
1444 const unsigned long actual_processors = physical_processors();
1445 if (actual_processors >= server_processors) {
1446 result = JNI_TRUE;
1447 }
1448 }
1449 if (_launcher_debug) {
1450 printf("linux_" LIBARCHNAME "_ServerClassMachine: %s\n",
1451 (result == JNI_TRUE ? "true" : "false"));
1452 }
1453 return result;
1454 }
1455
1456 #endif /* __linux__ && i586 */
1457
1458 /* Dispatch to the platform-specific definition of "server-class" */
1459 jboolean
1460 ServerClassMachine(void) {
1461 jboolean result = JNI_FALSE;
1462 #if defined(NEVER_ACT_AS_SERVER_CLASS_MACHINE)
1463 result = JNI_FALSE;
1464 #elif defined(ALWAYS_ACT_AS_SERVER_CLASS_MACHINE)
1465 result = JNI_TRUE;
1466 #elif defined(__sun) && defined(__sparc)
1467 result = solaris_sparc_ServerClassMachine();
1468 #elif defined(__sun) && defined(i586)
1469 result = solaris_i586_ServerClassMachine();
1470 #elif defined(__linux__) && defined(i586)
1471 result = linux_i586_ServerClassMachine();
1472 #else
1473 if (_launcher_debug) {
1474 printf("ServerClassMachine: returns default value of %s\n",
1475 (result == JNI_TRUE ? "true" : "false"));
1476 }
1477 #endif
1478 return result;
1479 }
1480
1481 /*
1482 * Since using the file system as a registry is a bit risky, perform
1483 * additional sanity checks on the identified directory to validate
1484 * it as a valid jre/sdk.
1485 *
1486 * Return 0 if the tests fail; otherwise return non-zero (true).
1487 *
1488 * Note that checking for anything more than the existence of an
1489 * executable object at bin/java relative to the path being checked
1490 * will break the regression tests.
1491 */
1492 static int
1493 CheckSanity(char *path, char *dir)
1494 {
1495 char buffer[PATH_MAX];
1496
1497 if (strlen(path) + strlen(dir) + 11 > PATH_MAX)
1498 return (0); /* Silently reject "impossibly" long paths */
1499
1500 (void)strcat(strcat(strcat(strcpy(buffer, path), "/"), dir), "/bin/java");
1501 return ((access(buffer, X_OK) == 0) ? 1 : 0);
1502 }
1503
1504 /*
1505 * Determine if there is an acceptable JRE in the directory dirname.
1506 * Upon locating the "best" one, return a fully qualified path to
1507 * it. "Best" is defined as the most advanced JRE meeting the
1508 * constraints contained in the manifest_info. If no JRE in this
1509 * directory meets the constraints, return NULL.
1510 *
1511 * Note that we don't check for errors in reading the directory
1512 * (which would be done by checking errno). This is because it
1513 * doesn't matter if we get an error reading the directory, or
1514 * we just don't find anything interesting in the directory. We
1515 * just return NULL in either case.
1516 *
1517 * The historical names of j2sdk and j2re were changed to jdk and
1518 * jre respecively as part of the 1.5 rebranding effort. Since the
1519 * former names are legacy on Linux, they must be recognized for
1520 * all time. Fortunately, this is a minor cost.
1521 */
1522 static char
1523 *ProcessDir(manifest_info *info, char *dirname)
1524 {
1525 DIR *dirp;
1526 struct dirent *dp;
1527 char *best = NULL;
1528 int offset;
1529 int best_offset = 0;
1530 char *ret_str = NULL;
1531 char buffer[PATH_MAX];
1532
1533 if ((dirp = opendir(dirname)) == NULL)
1534 return (NULL);
1535
1536 do {
1537 if ((dp = readdir(dirp)) != NULL) {
1538 offset = 0;
1539 if ((strncmp(dp->d_name, "jre", 3) == 0) ||
1540 (strncmp(dp->d_name, "jdk", 3) == 0))
1541 offset = 3;
1542 else if (strncmp(dp->d_name, "j2re", 4) == 0)
1543 offset = 4;
1544 else if (strncmp(dp->d_name, "j2sdk", 5) == 0)
1545 offset = 5;
1546 if (offset > 0) {
1547 if ((JLI_AcceptableRelease(dp->d_name + offset,
1548 info->jre_version)) && CheckSanity(dirname, dp->d_name))
1549 if ((best == NULL) || (JLI_ExactVersionId(
1550 dp->d_name + offset, best + best_offset) > 0)) {
1551 if (best != NULL)
1552 JLI_MemFree(best);
1553 best = JLI_StringDup(dp->d_name);
1554 best_offset = offset;
1555 }
1556 }
1557 }
1558 } while (dp != NULL);
1559 (void) closedir(dirp);
1560 if (best == NULL)
1561 return (NULL);
1562 else {
1563 ret_str = JLI_MemAlloc(strlen(dirname) + strlen(best) + 2);
1564 ret_str = strcat(strcat(strcpy(ret_str, dirname), "/"), best);
1565 JLI_MemFree(best);
1566 return (ret_str);
1567 }
1568 }
1569
1570 /*
1571 * This is the global entry point. It examines the host for the optimal
1572 * JRE to be used by scanning a set of directories. The set of directories
1573 * is platform dependent and can be overridden by the environment
1574 * variable JAVA_VERSION_PATH.
1575 *
1576 * This routine itself simply determines the set of appropriate
1577 * directories before passing control onto ProcessDir().
1578 */
1579 char*
1580 LocateJRE(manifest_info* info)
1581 {
1582 char *path;
1583 char *home;
1584 char *target = NULL;
1585 char *dp;
1586 char *cp;
1587
1588 /*
1589 * Start by getting JAVA_VERSION_PATH
1590 */
1591 if (info->jre_restrict_search)
1592 path = JLI_StringDup(system_dir);
1593 else if ((path = getenv("JAVA_VERSION_PATH")) != NULL)
1594 path = JLI_StringDup(path);
1595 else
1596 if ((home = getenv("HOME")) != NULL) {
1597 path = (char *)JLI_MemAlloc(strlen(home) + strlen(system_dir) +
1598 strlen(user_dir) + 2);
1599 path = strcat(strcat(strcat(strcpy(path, home),
1600 user_dir), ":"), system_dir);
1601 } else
1602 path = JLI_StringDup(system_dir);
1603
1604 /*
1605 * Step through each directory on the path. Terminate the scan with
1606 * the first directory with an acceptable JRE.
1607 */
1608 cp = dp = path;
1609 while (dp != NULL) {
1610 cp = strchr(dp, (int)':');
1611 if (cp != NULL)
1612 *cp = (char)NULL;
1613 if ((target = ProcessDir(info, dp)) != NULL)
1614 break;
1615 dp = cp;
1616 if (dp != NULL)
1617 dp++;
1618 }
1619 JLI_MemFree(path);
1620 return (target);
1621 }
1622
1623 /*
1624 * Given a path to a jre to execute, this routine checks if this process
1625 * is indeed that jre. If not, it exec's that jre.
1626 *
1627 * We want to actually check the paths rather than just the version string
1628 * built into the executable, so that given version specification (and
1629 * JAVA_VERSION_PATH) will yield the exact same Java environment, regardless
1630 * of the version of the arbitrary launcher we start with.
1631 */
1632 void
1633 ExecJRE(char *jre, char **argv)
1634 {
1635 char wanted[PATH_MAX];
1636 char *execname;
1637 char *progname;
1638
1639 /*
1640 * Resolve the real path to the directory containing the selected JRE.
1641 */
1642 if (realpath(jre, wanted) == NULL) {
1643 fprintf(stderr, "Unable to resolve %s\n", jre);
1644 exit(1);
1645 }
1646
1647 /*
1648 * Resolve the real path to the currently running launcher.
1649 */
1650 execname = SetExecname(argv);
1651 if (execname == NULL) {
1652 fprintf(stderr, "Unable to resolve current executable\n");
1653 exit(1);
1654 }
1655
1656 /*
1657 * If the path to the selected JRE directory is a match to the initial
1658 * portion of the path to the currently executing JRE, we have a winner!
1659 * If so, just return.
1660 */
1661 if (strncmp(wanted, execname, strlen(wanted)) == 0)
1662 return; /* I am the droid you were looking for */
1663
1664 /*
1665 * If this isn't the selected version, exec the selected version.
1666 */
1667 #ifdef JAVA_ARGS /* javac, jar and friends. */
1668 progname = "java";
1669 #else /* java, oldjava, javaw and friends */
1670 #ifdef PROGNAME
1671 progname = PROGNAME;
1672 #else
1673 progname = *argv;
1674 if ((s = strrchr(progname, FILE_SEPARATOR)) != 0) {
1675 progname = s + 1;
1676 }
1677 #endif /* PROGNAME */
1678 #endif /* JAVA_ARGS */
1679
1680 /*
1681 * This should never happen (because of the selection code in SelectJRE),
1682 * but check for "impossibly" long path names just because buffer overruns
1683 * can be so deadly.
1684 */
1685 if (strlen(wanted) + strlen(progname) + 6 > PATH_MAX) {
1686 fprintf(stderr, "Path length exceeds maximum length (PATH_MAX)\n");
1687 exit(1);
1688 }
1689
1690 /*
1691 * Construct the path and exec it.
1692 */
1693 (void)strcat(strcat(wanted, "/bin/"), progname);
1694 argv[0] = progname;
1695 if (_launcher_debug) {
1696 int i;
1697 printf("ReExec Command: %s (%s)\n", wanted, argv[0]);
1698 printf("ReExec Args:");
1699 for (i = 1; argv[i] != NULL; i++)
1700 printf(" %s", argv[i]);
1701 printf("\n");
1702 }
1703 (void)fflush(stdout);
1704 (void)fflush(stderr);
1705 execv(wanted, argv);
1706 perror("execv()");
1707 fprintf(stderr, "Exec of %s failed\n", wanted);
1708 exit(1);
1709 }
1710 #endif /* ifndef GAMMA */
1711
1712 /*
1713 * "Borrowed" from Solaris 10 where the unsetenv() function is being added
1714 * to libc thanks to SUSv3 (Standard Unix Specification, version 3). As
1715 * such, in the fullness of time this will appear in libc on all relevant
1716 * Solaris/Linux platforms and maybe even the Windows platform. At that
1717 * time, this stub can be removed.
1718 *
1719 * This implementation removes the environment locking for multithreaded
1720 * applications. (We don't have access to these mutexes within libc and
1721 * the launcher isn't multithreaded.) Note that what remains is platform
1722 * independent, because it only relies on attributes that a POSIX environment
1723 * defines.
1724 *
1725 * Returns 0 on success, -1 on failure.
1726 *
1727 * Also removed was the setting of errno. The only value of errno set
1728 * was EINVAL ("Invalid Argument").
1729 */
1730
1731 /*
1732 * s1(environ) is name=value
1733 * s2(name) is name(not the form of name=value).
1734 * if names match, return value of 1, else return 0
1735 */
1736 static int
1737 match_noeq(const char *s1, const char *s2)
1738 {
1739 while (*s1 == *s2++) {
1740 if (*s1++ == '=')
1741 return (1);
1742 }
1743 if (*s1 == '=' && s2[-1] == '\0')
1744 return (1);
1745 return (0);
1746 }
1747
1748 /*
1749 * added for SUSv3 standard
1750 *
1751 * Delete entry from environ.
1752 * Do not free() memory! Other threads may be using it.
1753 * Keep it around forever.
1754 */
1755 static int
1756 borrowed_unsetenv(const char *name)
1757 {
1758 long idx; /* index into environ */
1759
1760 if (name == NULL || *name == '\0' ||
1761 strchr(name, '=') != NULL) {
1762 return (-1);
1763 }
1764
1765 for (idx = 0; environ[idx] != NULL; idx++) {
1766 if (match_noeq(environ[idx], name))
1767 break;
1768 }
1769 if (environ[idx] == NULL) {
1770 /* name not found but still a success */
1771 return (0);
1772 }
1773 /* squeeze up one entry */
1774 do {
1775 environ[idx] = environ[idx+1];
1776 } while (environ[++idx] != NULL);
1777
1778 return (0);
1779 }
1780 /* --- End of "borrowed" code --- */
1781
1782 /*
1783 * Wrapper for unsetenv() function.
1784 */
1785 int
1786 UnsetEnv(char *name)
1787 {
1788 return(borrowed_unsetenv(name));
1789 }
1790
1791 /* --- Splash Screen shared library support --- */
1792
1793 static const char* SPLASHSCREEN_SO = "libsplashscreen.so";
1794
1795 static void* hSplashLib = NULL;
1796
1797 void* SplashProcAddress(const char* name) {
1798 if (!hSplashLib) {
1799 hSplashLib = dlopen(SPLASHSCREEN_SO, RTLD_LAZY | RTLD_GLOBAL);
1800 }
1801 if (hSplashLib) {
1802 void* sym = dlsym(hSplashLib, name);
1803 return sym;
1804 } else {
1805 return NULL;
1806 }
1807 }
1808
1809 void SplashFreeLibrary() {
1810 if (hSplashLib) {
1811 dlclose(hSplashLib);
1812 hSplashLib = NULL;
1813 }
1814 }
1815
1816 const char *
1817 jlong_format_specifier() {
1818 return "%lld";
1819 }
1820
1821 /*
1822 * Block current thread and continue execution in a new thread
1823 */
1824 int
1825 ContinueInNewThread(int (JNICALL *continuation)(void *), jlong stack_size, void * args) {
1826 int rslt;
1827 #ifdef __linux__
1828 pthread_t tid;
1829 pthread_attr_t attr;
1830 pthread_attr_init(&attr);
1831 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
1832
1833 if (stack_size > 0) {
1834 pthread_attr_setstacksize(&attr, stack_size);
1835 }
1836
1837 if (pthread_create(&tid, &attr, (void *(*)(void*))continuation, (void*)args) == 0) {
1838 void * tmp;
1839 pthread_join(tid, &tmp);
1840 rslt = (int)tmp;
1841 } else {
1842 /*
1843 * Continue execution in current thread if for some reason (e.g. out of
1844 * memory/LWP) a new thread can't be created. This will likely fail
1845 * later in continuation as JNI_CreateJavaVM needs to create quite a
1846 * few new threads, anyway, just give it a try..
1847 */
1848 rslt = continuation(args);
1849 }
1850
1851 pthread_attr_destroy(&attr);
1852 #else
1853 thread_t tid;
1854 long flags = 0;
1855 if (thr_create(NULL, stack_size, (void *(*)(void *))continuation, args, flags, &tid) == 0) {
1856 void * tmp;
1857 thr_join(tid, NULL, &tmp);
1858 rslt = (int)tmp;
1859 } else {
1860 /* See above. Continue in current thread if thr_create() failed */
1861 rslt = continuation(args);
1862 }
1863 #endif
1864 return rslt;
1865 }
1866
1867 /* Coarse estimation of number of digits assuming the worst case is a 64-bit pid. */
1868 #define MAX_PID_STR_SZ 20
1869
1870 void SetJavaLauncherPlatformProps() {
1871 /* Linux only */
1872 #ifdef __linux__
1873 const char *substr = "-Dsun.java.launcher.pid=";
1874 char *pid_prop_str = (char *)JLI_MemAlloc(strlen(substr) + MAX_PID_STR_SZ + 1);
1875 sprintf(pid_prop_str, "%s%d", substr, getpid());
1876 AddOption(pid_prop_str, NULL);
1877 #endif
1878 }