1 /*
2 * Copyright (c) 1999, 2008, 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 * Gamma (Hotspot internal engineering test) launcher based on 1.6.0-b28 JDK,
27 * search "GAMMA" for gamma specific changes.
28 */
29
30 #include "java.h"
31 #include <dirent.h>
32 #include <dlfcn.h>
33 #include <fcntl.h>
34 #include <inttypes.h>
35 #include <stdio.h>
36 #include <string.h>
37 #include <stdlib.h>
38 #include <limits.h>
39 #include <sys/stat.h>
40 #include <unistd.h>
41 #include <sys/types.h>
42
43 #ifndef GAMMA
44 #include "manifest_info.h"
45 #include "version_comp.h"
46 #endif
47
48 #define JVM_DLL "libjvm.so"
49 #define JAVA_DLL "libjava.so"
50
51 #ifndef GAMMA /* launcher.make defines ARCH */
52
53 /*
54 * If a processor / os combination has the ability to run binaries of
55 * two data models and cohabitation of jre/jdk bits with both data
56 * models is supported, then DUAL_MODE is defined. When DUAL_MODE is
57 * defined, the architecture names for the narrow and wide version of
58 * the architecture are defined in BIG_ARCH and SMALL_ARCH. Currently
59 * only Solaris on sparc/sparcv9 and i586/amd64 is DUAL_MODE; linux
60 * i586/amd64 could be defined as DUAL_MODE but that is not the
61 * current policy.
62 */
63
64 #ifdef _LP64
65
66 # ifdef ia64
67 # define ARCH "ia64"
68 # elif defined(amd64)
69 # define ARCH "amd64"
70 # elif defined(__sparc)
71 # define ARCH "sparcv9"
72 # else
73 # define ARCH "unknown" /* unknown 64-bit architecture */
74 # endif
75
76 #else /* 32-bit data model */
77
78 # ifdef i586
79 # define ARCH "i386"
80 # elif defined(__sparc)
81 # define ARCH "sparc"
82 # elif defined(arm)
83 # define ARCH "arm"
84 # elif defined(PPC)
85 # define ARCH "ppc"
86 # endif
87
88 #endif /* _LP64 */
89
90 #ifdef __sun
91 # define DUAL_MODE
92 # ifdef __sparc
93 # define BIG_ARCH "sparcv9"
94 # define SMALL_ARCH "sparc"
95 # else
96 # define BIG_ARCH "amd64"
97 # define SMALL_ARCH "i386"
98 # endif
99 # include <sys/systeminfo.h>
100 # include <sys/elf.h>
101 # include <stdio.h>
102 #else
103 # ifndef ARCH
104 # include <sys/systeminfo.h>
105 # endif
106 #endif
107
108 #endif /* ifndef GAMMA */
109
110 /* pointer to environment */
111 extern char **environ;
112
113 #ifndef GAMMA
114
115 /*
116 * A collection of useful strings. One should think of these as #define
117 * entries, but actual strings can be more efficient (with many compilers).
118 */
119 #ifdef __linux__
120 static const char *system_dir = "/usr/java";
121 static const char *user_dir = "/java";
122 #else /* Solaris */
123 static const char *system_dir = "/usr/jdk";
124 static const char *user_dir = "/jdk";
125 #endif
126
127 #endif /* ifndef GAMMA */
128
129 /*
130 * Flowchart of launcher execs and options processing on unix
131 *
132 * The selection of the proper vm shared library to open depends on
133 * several classes of command line options, including vm "flavor"
134 * options (-client, -server) and the data model options, -d32 and
135 * -d64, as well as a version specification which may have come from
136 * the command line or from the manifest of an executable jar file.
137 * The vm selection options are not passed to the running
138 * virtual machine; they must be screened out by the launcher.
139 *
140 * The version specification (if any) is processed first by the
141 * platform independent routine SelectVersion. This may result in
142 * the exec of the specified launcher version.
143 *
144 * Typically, the launcher execs at least once to ensure a suitable
145 * LD_LIBRARY_PATH is in effect for the process. The first exec
146 * screens out all the data model options; leaving the choice of data
147 * model implicit in the binary selected to run. However, in case no
148 * exec is done, the data model options are screened out before the vm
149 * is invoked.
150 *
151 * incoming argv ------------------------------
152 * | |
153 * \|/ |
154 * CheckJVMType |
155 * (removes -client, -server, etc.) |
156 * \|/
157 * CreateExecutionEnvironment
158 * (removes -d32 and -d64,
159 * determines desired data model,
160 * sets up LD_LIBRARY_PATH,
161 * and exec's)
162 * |
163 * --------------------------------------------
164 * |
165 * \|/
166 * exec child 1 incoming argv -----------------
167 * | |
168 * \|/ |
169 * CheckJVMType |
170 * (removes -client, -server, etc.) |
171 * | \|/
172 * | CreateExecutionEnvironment
173 * | (verifies desired data model
174 * | is running and acceptable
175 * | LD_LIBRARY_PATH;
176 * | no-op in child)
177 * |
178 * \|/
179 * TranslateDashJArgs...
180 * (Prepare to pass args to vm)
181 * |
182 * |
183 * |
184 * \|/
185 * ParseArguments
186 * (ignores -d32 and -d64,
187 * processes version options,
188 * creates argument list for vm,
189 * etc.)
190 *
191 */
192
193 static char *SetExecname(char **argv);
194 static char * GetExecname();
195 static jboolean GetJVMPath(const char *jrepath, const char *jvmtype,
196 char *jvmpath, jint jvmpathsize, char * arch);
197 static jboolean GetJREPath(char *path, jint pathsize, char * arch, jboolean speculative);
198
199 const char *
200 GetArch()
201 {
202 static char *arch = NULL;
203 static char buf[12];
204 if (arch) {
205 return arch;
206 }
207
208 #ifdef ARCH
209 strcpy(buf, ARCH);
210 #else
211 sysinfo(SI_ARCHITECTURE, buf, sizeof(buf));
212 #endif
213 arch = buf;
214 return arch;
215 }
216
217 void
218 CreateExecutionEnvironment(int *_argcp,
219 char ***_argvp,
220 char jrepath[],
221 jint so_jrepath,
222 char jvmpath[],
223 jint so_jvmpath,
224 char **original_argv) {
225 /*
226 * First, determine if we are running the desired data model. If we
227 * are running the desired data model, all the error messages
228 * associated with calling GetJREPath, ReadKnownVMs, etc. should be
229 * output. However, if we are not running the desired data model,
230 * some of the errors should be suppressed since it is more
231 * informative to issue an error message based on whether or not the
232 * os/processor combination has dual mode capabilities.
233 */
234
235 char *execname = NULL;
236 int original_argc = *_argcp;
237 jboolean jvmpathExists;
238
239 /* Compute the name of the executable */
240 execname = SetExecname(*_argvp);
241
242 #ifndef GAMMA
243 /* Set the LD_LIBRARY_PATH environment variable, check data model
244 flags, and exec process, if needed */
245 {
246 char *arch = (char *)GetArch(); /* like sparc or sparcv9 */
247 char * jvmtype = NULL;
248 int argc = *_argcp;
249 char **argv = original_argv;
250
251 char *runpath = NULL; /* existing effective LD_LIBRARY_PATH
252 setting */
253
254 int running = /* What data model is being ILP32 =>
255 32 bit vm; LP64 => 64 bit vm */
256 #ifdef _LP64
257 64;
258 #else
259 32;
260 #endif
261
262 int wanted = running; /* What data mode is being
263 asked for? Current model is
264 fine unless another model
265 is asked for */
266
267 char* new_runpath = NULL; /* desired new LD_LIBRARY_PATH string */
268 char* newpath = NULL; /* path on new LD_LIBRARY_PATH */
269 char* lastslash = NULL;
270
271 char** newenvp = NULL; /* current environment */
272
273 char** newargv = NULL;
274 int newargc = 0;
275 #ifdef __sun
276 char* dmpath = NULL; /* data model specific LD_LIBRARY_PATH,
277 Solaris only */
278 #endif
279
280 /*
281 * Starting in 1.5, all unix platforms accept the -d32 and -d64
282 * options. On platforms where only one data-model is supported
283 * (e.g. ia-64 Linux), using the flag for the other data model is
284 * an error and will terminate the program.
285 */
286
287 { /* open new scope to declare local variables */
288 int i;
289
290 newargv = (char **)MemAlloc((argc+1) * sizeof(*newargv));
291 newargv[newargc++] = argv[0];
292
293 /* scan for data model arguments and remove from argument list;
294 last occurrence determines desired data model */
295 for (i=1; i < argc; i++) {
296
297 if (strcmp(argv[i], "-J-d64") == 0 || strcmp(argv[i], "-d64") == 0) {
298 wanted = 64;
299 continue;
300 }
301 if (strcmp(argv[i], "-J-d32") == 0 || strcmp(argv[i], "-d32") == 0) {
302 wanted = 32;
303 continue;
304 }
305 newargv[newargc++] = argv[i];
306
307 #ifdef JAVA_ARGS
308 if (argv[i][0] != '-')
309 continue;
310 #else
311 if (strcmp(argv[i], "-classpath") == 0 || strcmp(argv[i], "-cp") == 0) {
312 i++;
313 if (i >= argc) break;
314 newargv[newargc++] = argv[i];
315 continue;
316 }
317 if (argv[i][0] != '-') { i++; break; }
318 #endif
319 }
320
321 /* copy rest of args [i .. argc) */
322 while (i < argc) {
323 newargv[newargc++] = argv[i++];
324 }
325 newargv[newargc] = NULL;
326
327 /*
328 * newargv has all proper arguments here
329 */
330
331 argc = newargc;
332 argv = newargv;
333 }
334
335 /* If the data model is not changing, it is an error if the
336 jvmpath does not exist */
337 if (wanted == running) {
338 /* Find out where the JRE is that we will be using. */
339 if (!GetJREPath(jrepath, so_jrepath, arch, JNI_FALSE) ) {
340 fprintf(stderr, "Error: could not find Java 2 Runtime Environment.\n");
341 exit(2);
342 }
343
344 /* Find the specified JVM type */
345 if (ReadKnownVMs(jrepath, arch, JNI_FALSE) < 1) {
346 fprintf(stderr, "Error: no known VMs. (check for corrupt jvm.cfg file)\n");
347 exit(1);
348 }
349
350 jvmpath[0] = '\0';
351 jvmtype = CheckJvmType(_argcp, _argvp, JNI_FALSE);
352
353 if (!GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath, arch )) {
354 fprintf(stderr, "Error: no `%s' JVM at `%s'.\n", jvmtype, jvmpath);
355 exit(4);
356 }
357 } else { /* do the same speculatively or exit */
358 #ifdef DUAL_MODE
359 if (running != wanted) {
360 /* Find out where the JRE is that we will be using. */
361 if (!GetJREPath(jrepath, so_jrepath, ((wanted==64)?BIG_ARCH:SMALL_ARCH), JNI_TRUE)) {
362 goto EndDataModelSpeculate;
363 }
364
365 /*
366 * Read in jvm.cfg for target data model and process vm
367 * selection options.
368 */
369 if (ReadKnownVMs(jrepath, ((wanted==64)?BIG_ARCH:SMALL_ARCH), JNI_TRUE) < 1) {
370 goto EndDataModelSpeculate;
371 }
372 jvmpath[0] = '\0';
373 jvmtype = CheckJvmType(_argcp, _argvp, JNI_TRUE);
374 /* exec child can do error checking on the existence of the path */
375 jvmpathExists = GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath,
376 ((wanted==64)?BIG_ARCH:SMALL_ARCH));
377
378 }
379 EndDataModelSpeculate: /* give up and let other code report error message */
380 ;
381 #else
382 fprintf(stderr, "Running a %d-bit JVM is not supported on this platform.\n", wanted);
383 exit(1);
384 #endif
385 }
386
387 /*
388 * We will set the LD_LIBRARY_PATH as follows:
389 *
390 * o $JVMPATH (directory portion only)
391 * o $JRE/lib/$ARCH
392 * o $JRE/../lib/$ARCH
393 *
394 * followed by the user's previous effective LD_LIBRARY_PATH, if
395 * any.
396 */
397
398 #ifdef __sun
399 /*
400 * Starting in Solaris 7, ld.so.1 supports three LD_LIBRARY_PATH
401 * variables:
402 *
403 * 1. LD_LIBRARY_PATH -- used for 32 and 64 bit searches if
404 * data-model specific variables are not set.
405 *
406 * 2. LD_LIBRARY_PATH_64 -- overrides and replaces LD_LIBRARY_PATH
407 * for 64-bit binaries.
408 *
409 * 3. LD_LIBRARY_PATH_32 -- overrides and replaces LD_LIBRARY_PATH
410 * for 32-bit binaries.
411 *
412 * The vm uses LD_LIBRARY_PATH to set the java.library.path system
413 * property. To shield the vm from the complication of multiple
414 * LD_LIBRARY_PATH variables, if the appropriate data model
415 * specific variable is set, we will act as if LD_LIBRARY_PATH had
416 * the value of the data model specific variant and the data model
417 * specific variant will be unset. Note that the variable for the
418 * *wanted* data model must be used (if it is set), not simply the
419 * current running data model.
420 */
421
422 switch(wanted) {
423 case 0:
424 if(running == 32) {
425 dmpath = getenv("LD_LIBRARY_PATH_32");
426 wanted = 32;
427 }
428 else {
429 dmpath = getenv("LD_LIBRARY_PATH_64");
430 wanted = 64;
431 }
432 break;
433
434 case 32:
435 dmpath = getenv("LD_LIBRARY_PATH_32");
436 break;
437
438 case 64:
439 dmpath = getenv("LD_LIBRARY_PATH_64");
440 break;
441
442 default:
443 fprintf(stderr, "Improper value at line %d.", __LINE__);
444 exit(1); /* unknown value in wanted */
445 break;
446 }
447
448 /*
449 * If dmpath is NULL, the relevant data model specific variable is
450 * not set and normal LD_LIBRARY_PATH should be used.
451 */
452 if( dmpath == NULL) {
453 runpath = getenv("LD_LIBRARY_PATH");
454 }
455 else {
456 runpath = dmpath;
457 }
458 #else
459 /*
460 * If not on Solaris, assume only a single LD_LIBRARY_PATH
461 * variable.
462 */
463 runpath = getenv("LD_LIBRARY_PATH");
464 #endif /* __sun */
465
466 #ifdef __linux
467 /*
468 * On linux, if a binary is running as sgid or suid, glibc sets
469 * LD_LIBRARY_PATH to the empty string for security purposes. (In
470 * contrast, on Solaris the LD_LIBRARY_PATH variable for a
471 * privileged binary does not lose its settings; but the dynamic
472 * linker does apply more scrutiny to the path.) The launcher uses
473 * the value of LD_LIBRARY_PATH to prevent an exec loop.
474 * Therefore, if we are running sgid or suid, this function's
475 * setting of LD_LIBRARY_PATH will be ineffective and we should
476 * return from the function now. Getting the right libraries to
477 * be found must be handled through other mechanisms.
478 */
479 if((getgid() != getegid()) || (getuid() != geteuid()) ) {
480 return;
481 }
482 #endif
483
484 /* runpath contains current effective LD_LIBRARY_PATH setting */
485
486 jvmpath = strdup(jvmpath);
487 new_runpath = MemAlloc( ((runpath!=NULL)?strlen(runpath):0) +
488 2*strlen(jrepath) + 2*strlen(arch) +
489 strlen(jvmpath) + 52);
490 newpath = new_runpath + strlen("LD_LIBRARY_PATH=");
491
492
493 /*
494 * Create desired LD_LIBRARY_PATH value for target data model.
495 */
496 {
497 /* remove the name of the .so from the JVM path */
498 lastslash = strrchr(jvmpath, '/');
499 if (lastslash)
500 *lastslash = '\0';
501
502
503 /* jvmpath, ((running != wanted)?((wanted==64)?"/"BIG_ARCH:"/.."):""), */
504
505 sprintf(new_runpath, "LD_LIBRARY_PATH="
506 "%s:"
507 "%s/lib/%s:"
508 "%s/../lib/%s",
509 jvmpath,
510 #ifdef DUAL_MODE
511 jrepath, ((wanted==64)?BIG_ARCH:SMALL_ARCH),
512 jrepath, ((wanted==64)?BIG_ARCH:SMALL_ARCH)
513 #else
514 jrepath, arch,
515 jrepath, arch
516 #endif
517 );
518
519
520 /*
521 * Check to make sure that the prefix of the current path is the
522 * desired environment variable setting.
523 */
524 if (runpath != NULL &&
525 strncmp(newpath, runpath, strlen(newpath))==0 &&
526 (runpath[strlen(newpath)] == 0 || runpath[strlen(newpath)] == ':') &&
527 (running == wanted) /* data model does not have to be changed */
528 #ifdef __sun
529 && (dmpath == NULL) /* data model specific variables not set */
530 #endif
531 ) {
532
533 return;
534
535 }
536 }
537
538 /*
539 * Place the desired environment setting onto the prefix of
540 * LD_LIBRARY_PATH. Note that this prevents any possible infinite
541 * loop of execv() because we test for the prefix, above.
542 */
543 if (runpath != 0) {
544 strcat(new_runpath, ":");
545 strcat(new_runpath, runpath);
546 }
547
548 if( putenv(new_runpath) != 0) {
549 exit(1); /* problem allocating memory; LD_LIBRARY_PATH not set
550 properly */
551 }
552
553 /*
554 * Unix systems document that they look at LD_LIBRARY_PATH only
555 * once at startup, so we have to re-exec the current executable
556 * to get the changed environment variable to have an effect.
557 */
558
559 #ifdef __sun
560 /*
561 * If dmpath is not NULL, remove the data model specific string
562 * in the environment for the exec'ed child.
563 */
564
565 if( dmpath != NULL)
566 (void)UnsetEnv((wanted==32)?"LD_LIBRARY_PATH_32":"LD_LIBRARY_PATH_64");
567 #endif
568
569 newenvp = environ;
570
571 {
572 char *newexec = execname;
573 #ifdef DUAL_MODE
574 /*
575 * If the data model is being changed, the path to the
576 * executable must be updated accordingly; the executable name
577 * and directory the executable resides in are separate. In the
578 * case of 32 => 64, the new bits are assumed to reside in, e.g.
579 * "olddir/BIGARCH/execname"; in the case of 64 => 32,
580 * the bits are assumed to be in "olddir/../execname". For example,
581 *
582 * olddir/sparcv9/execname
583 * olddir/amd64/execname
584 *
585 * for Solaris SPARC and Linux amd64, respectively.
586 */
587
588 if (running != wanted) {
589 char *oldexec = strcpy(MemAlloc(strlen(execname) + 1), execname);
590 char *olddir = oldexec;
591 char *oldbase = strrchr(oldexec, '/');
592
593
594 newexec = MemAlloc(strlen(execname) + 20);
595 *oldbase++ = 0;
596 sprintf(newexec, "%s/%s/%s", olddir,
597 ((wanted==64) ? BIG_ARCH : ".."), oldbase);
598 argv[0] = newexec;
599 }
600 #endif
601
602 execve(newexec, argv, newenvp);
603 perror("execve()");
604
605 fprintf(stderr, "Error trying to exec %s.\n", newexec);
606 fprintf(stderr, "Check if file exists and permissions are set correctly.\n");
607
608 #ifdef DUAL_MODE
609 if (running != wanted) {
610 fprintf(stderr, "Failed to start a %d-bit JVM process from a %d-bit JVM.\n",
611 wanted, running);
612 # ifdef __sun
613
614 # ifdef __sparc
615 fprintf(stderr, "Verify all necessary J2SE components have been installed.\n" );
616 fprintf(stderr,
617 "(Solaris SPARC 64-bit components must be installed after 32-bit components.)\n" );
618 # else
619 fprintf(stderr, "Either 64-bit processes are not supported by this platform\n");
620 fprintf(stderr, "or the 64-bit components have not been installed.\n");
621 # endif
622 }
623 # endif
624 #endif
625
626 }
627
628 exit(1);
629 }
630
631 #else /* ifndef GAMMA */
632
633 /* gamma launcher is simpler in that it doesn't handle VM flavors, data */
634 /* model, LD_LIBRARY_PATH, etc. Assuming everything is set-up correctly */
635 /* all we need to do here is to return correct path names. See also */
636 /* GetJVMPath() and GetApplicationHome(). */
637
638 { char *arch = (char *)GetArch(); /* like sparc or sparcv9 */
639 char *p;
640
641 if (!GetJREPath(jrepath, so_jrepath, arch, JNI_FALSE) ) {
642 fprintf(stderr, "Error: could not find Java 2 Runtime Environment.\n");
643 exit(2);
644 }
645
646 if (!GetJVMPath(jrepath, NULL, jvmpath, so_jvmpath, arch )) {
647 fprintf(stderr, "Error: no JVM at `%s'.\n", jvmpath);
648 exit(4);
649 }
650 }
651
652 #endif /* ifndef GAMMA */
653 }
654
655
656 /*
657 * On Solaris VM choosing is done by the launcher (java.c).
658 */
659 static jboolean
660 GetJVMPath(const char *jrepath, const char *jvmtype,
661 char *jvmpath, jint jvmpathsize, char * arch)
662 {
663 struct stat s;
664
665 #ifndef GAMMA
666 if (strchr(jvmtype, '/')) {
667 sprintf(jvmpath, "%s/" JVM_DLL, jvmtype);
668 } else {
669 sprintf(jvmpath, "%s/lib/%s/%s/" JVM_DLL, jrepath, arch, jvmtype);
670 }
671 #else
672 /* For gamma launcher, JVM is either built-in or in the same directory. */
673 /* Either way we return "<exe_path>/libjvm.so" where <exe_path> is the */
674 /* directory where gamma launcher is located. */
675
676 char *p;
677
678 snprintf(jvmpath, jvmpathsize, "%s", GetExecname());
679 p = strrchr(jvmpath, '/');
680 if (p) {
681 /* replace executable name with libjvm.so */
682 snprintf(p + 1, jvmpathsize - (p + 1 - jvmpath), "%s", JVM_DLL);
683 } else {
684 /* this case shouldn't happen */
685 snprintf(jvmpath, jvmpathsize, "%s", JVM_DLL);
686 }
687 #endif
688
689 if (_launcher_debug)
690 printf("Does `%s' exist ... ", jvmpath);
691
692 if (stat(jvmpath, &s) == 0) {
693 if (_launcher_debug)
694 printf("yes.\n");
695 return JNI_TRUE;
696 } else {
697 if (_launcher_debug)
698 printf("no.\n");
699 return JNI_FALSE;
700 }
701 }
702
703 /*
704 * Find path to JRE based on .exe's location or registry settings.
705 */
706 static jboolean
707 GetJREPath(char *path, jint pathsize, char * arch, jboolean speculative)
708 {
709 char libjava[MAXPATHLEN];
710
711 if (GetApplicationHome(path, pathsize)) {
712 /* Is JRE co-located with the application? */
713 sprintf(libjava, "%s/lib/%s/" JAVA_DLL, path, arch);
714 if (access(libjava, F_OK) == 0) {
715 goto found;
716 }
717
718 /* Does the app ship a private JRE in <apphome>/jre directory? */
719 sprintf(libjava, "%s/jre/lib/%s/" JAVA_DLL, path, arch);
720 if (access(libjava, F_OK) == 0) {
721 strcat(path, "/jre");
722 goto found;
723 }
724 }
725
726 if (!speculative)
727 fprintf(stderr, "Error: could not find " JAVA_DLL "\n");
728 return JNI_FALSE;
729
730 found:
731 if (_launcher_debug)
732 printf("JRE path is %s\n", path);
733 return JNI_TRUE;
734 }
735
736 jboolean
737 LoadJavaVM(const char *jvmpath, InvocationFunctions *ifn)
738 {
739 #ifdef GAMMA
740 /* JVM is directly linked with gamma launcher; no dlopen() */
741 ifn->CreateJavaVM = JNI_CreateJavaVM;
742 ifn->GetDefaultJavaVMInitArgs = JNI_GetDefaultJavaVMInitArgs;
743 return JNI_TRUE;
744 #else
745 Dl_info dlinfo;
746 void *libjvm;
747
748 if (_launcher_debug) {
749 printf("JVM path is %s\n", jvmpath);
750 }
751
752 libjvm = dlopen(jvmpath, RTLD_NOW + RTLD_GLOBAL);
753 if (libjvm == NULL) {
754 #if defined(__sparc) && !defined(_LP64) /* i.e. 32-bit sparc */
755 FILE * fp;
756 Elf32_Ehdr elf_head;
757 int count;
758 int location;
759
760 fp = fopen(jvmpath, "r");
761 if(fp == NULL)
762 goto error;
763
764 /* read in elf header */
765 count = fread((void*)(&elf_head), sizeof(Elf32_Ehdr), 1, fp);
766 fclose(fp);
767 if(count < 1)
768 goto error;
769
770 /*
771 * Check for running a server vm (compiled with -xarch=v8plus)
772 * on a stock v8 processor. In this case, the machine type in
773 * the elf header would not be included the architecture list
774 * provided by the isalist command, which is turn is gotten from
775 * sysinfo. This case cannot occur on 64-bit hardware and thus
776 * does not have to be checked for in binaries with an LP64 data
777 * model.
778 */
779 if(elf_head.e_machine == EM_SPARC32PLUS) {
780 char buf[257]; /* recommended buffer size from sysinfo man
781 page */
782 long length;
783 char* location;
784
785 length = sysinfo(SI_ISALIST, buf, 257);
786 if(length > 0) {
787 location = strstr(buf, "sparcv8plus ");
788 if(location == NULL) {
789 fprintf(stderr, "SPARC V8 processor detected; Server compiler requires V9 or better.\n");
790 fprintf(stderr, "Use Client compiler on V8 processors.\n");
791 fprintf(stderr, "Could not create the Java virtual machine.\n");
792 return JNI_FALSE;
793 }
794 }
795 }
796 #endif
797 fprintf(stderr, "dl failure on line %d", __LINE__);
798 goto error;
799 }
800
801 ifn->CreateJavaVM = (CreateJavaVM_t)
802 dlsym(libjvm, "JNI_CreateJavaVM");
803 if (ifn->CreateJavaVM == NULL)
804 goto error;
805
806 ifn->GetDefaultJavaVMInitArgs = (GetDefaultJavaVMInitArgs_t)
807 dlsym(libjvm, "JNI_GetDefaultJavaVMInitArgs");
808 if (ifn->GetDefaultJavaVMInitArgs == NULL)
809 goto error;
810
811 return JNI_TRUE;
812
813 error:
814 fprintf(stderr, "Error: failed %s, because %s\n", jvmpath, dlerror());
815 return JNI_FALSE;
816 #endif /* GAMMA */
817 }
818
819 /*
820 * Get the path to the file that has the usage message for -X options.
821 */
822 void
823 GetXUsagePath(char *buf, jint bufsize)
824 {
825 static const char Xusage_txt[] = "/Xusage.txt";
826 Dl_info dlinfo;
827
828 /* we use RTLD_NOW because of problems with ld.so.1 and green threads */
829 dladdr(dlsym(dlopen(JVM_DLL, RTLD_NOW), "JNI_CreateJavaVM"), &dlinfo);
830 strncpy(buf, (char *)dlinfo.dli_fname, bufsize - sizeof(Xusage_txt));
831
832 buf[bufsize-1] = '\0';
833 strcpy(strrchr(buf, '/'), Xusage_txt);
834 }
835
836 /*
837 * If app is "/foo/bin/javac", or "/foo/bin/sparcv9/javac" then put
838 * "/foo" into buf.
839 */
840 jboolean
841 GetApplicationHome(char *buf, jint bufsize)
842 {
843 #ifdef __linux__
844 char *execname = GetExecname();
845 if (execname) {
846 strncpy(buf, execname, bufsize-1);
847 buf[bufsize-1] = '\0';
848 } else {
849 return JNI_FALSE;
850 }
851 #else
852 Dl_info dlinfo;
853
854 dladdr((void *)GetApplicationHome, &dlinfo);
855 if (realpath(dlinfo.dli_fname, buf) == NULL) {
856 fprintf(stderr, "Error: realpath(`%s') failed.\n", dlinfo.dli_fname);
857 return JNI_FALSE;
858 }
859 #endif
860
861 #ifdef GAMMA
862 {
863 /* gamma launcher uses JAVA_HOME environment variable to find JDK/JRE */
864 char* java_home_var = getenv("JAVA_HOME");
865 if (java_home_var == NULL) {
866 printf("JAVA_HOME must point to a valid JDK/JRE to run gamma\n");
867 return JNI_FALSE;
868 }
869 snprintf(buf, bufsize, "%s", java_home_var);
870 }
871 #else
872 if (strrchr(buf, '/') == 0) {
873 buf[0] = '\0';
874 return JNI_FALSE;
875 }
876 *(strrchr(buf, '/')) = '\0'; /* executable file */
877 if (strlen(buf) < 4 || strrchr(buf, '/') == 0) {
878 buf[0] = '\0';
879 return JNI_FALSE;
880 }
881 if (strcmp("/bin", buf + strlen(buf) - 4) != 0)
882 *(strrchr(buf, '/')) = '\0'; /* sparcv9 or amd64 */
883 if (strlen(buf) < 4 || strcmp("/bin", buf + strlen(buf) - 4) != 0) {
884 buf[0] = '\0';
885 return JNI_FALSE;
886 }
887 *(strrchr(buf, '/')) = '\0'; /* bin */
888 #endif /* GAMMA */
889
890 return JNI_TRUE;
891 }
892
893
894 /*
895 * Return true if the named program exists
896 */
897 static int
898 ProgramExists(char *name)
899 {
900 struct stat sb;
901 if (stat(name, &sb) != 0) return 0;
902 if (S_ISDIR(sb.st_mode)) return 0;
903 return (sb.st_mode & S_IEXEC) != 0;
904 }
905
906
907 /*
908 * Find a command in a directory, returning the path.
909 */
910 static char *
911 Resolve(char *indir, char *cmd)
912 {
913 char name[PATH_MAX + 2], *real;
914
915 if ((strlen(indir) + strlen(cmd) + 1) > PATH_MAX) return 0;
916 sprintf(name, "%s%c%s", indir, FILE_SEPARATOR, cmd);
917 if (!ProgramExists(name)) return 0;
918 real = MemAlloc(PATH_MAX + 2);
919 if (!realpath(name, real))
920 strcpy(real, name);
921 return real;
922 }
923
924
925 /*
926 * Find a path for the executable
927 */
928 static char *
929 FindExecName(char *program)
930 {
931 char cwdbuf[PATH_MAX+2];
932 char *path;
933 char *tmp_path;
934 char *f;
935 char *result = NULL;
936
937 /* absolute path? */
938 if (*program == FILE_SEPARATOR ||
939 (FILE_SEPARATOR=='\\' && strrchr(program, ':')))
940 return Resolve("", program+1);
941
942 /* relative path? */
943 if (strrchr(program, FILE_SEPARATOR) != 0) {
944 char buf[PATH_MAX+2];
945 return Resolve(getcwd(cwdbuf, sizeof(cwdbuf)), program);
946 }
947
948 /* from search path? */
949 path = getenv("PATH");
950 if (!path || !*path) path = ".";
951 tmp_path = MemAlloc(strlen(path) + 2);
952 strcpy(tmp_path, path);
953
954 for (f=tmp_path; *f && result==0; ) {
955 char *s = f;
956 while (*f && (*f != PATH_SEPARATOR)) ++f;
957 if (*f) *f++ = 0;
958 if (*s == FILE_SEPARATOR)
959 result = Resolve(s, program);
960 else {
961 /* relative path element */
962 char dir[2*PATH_MAX];
963 sprintf(dir, "%s%c%s", getcwd(cwdbuf, sizeof(cwdbuf)),
964 FILE_SEPARATOR, s);
965 result = Resolve(dir, program);
966 }
967 if (result != 0) break;
968 }
969
970 free(tmp_path);
971 return result;
972 }
973
974
975 /* Store the name of the executable once computed */
976 static char *execname = NULL;
977
978 /*
979 * Compute the name of the executable
980 *
981 * In order to re-exec securely we need the absolute path of the
982 * executable. On Solaris getexecname(3c) may not return an absolute
983 * path so we use dladdr to get the filename of the executable and
984 * then use realpath to derive an absolute path. From Solaris 9
985 * onwards the filename returned in DL_info structure from dladdr is
986 * an absolute pathname so technically realpath isn't required.
987 * On Linux we read the executable name from /proc/self/exe.
988 * As a fallback, and for platforms other than Solaris and Linux,
989 * we use FindExecName to compute the executable name.
990 */
991 static char *
992 SetExecname(char **argv)
993 {
994 char* exec_path = NULL;
995
996 if (execname != NULL) /* Already determined */
997 return (execname);
998
999 #if defined(__sun)
1000 {
1001 Dl_info dlinfo;
1002 if (dladdr((void*)&SetExecname, &dlinfo)) {
1003 char *resolved = (char*)MemAlloc(PATH_MAX+1);
1004 if (resolved != NULL) {
1005 exec_path = realpath(dlinfo.dli_fname, resolved);
1006 if (exec_path == NULL) {
1007 free(resolved);
1008 }
1009 }
1010 }
1011 }
1012 #elif defined(__linux__)
1013 {
1014 const char* self = "/proc/self/exe";
1015 char buf[PATH_MAX+1];
1016 int len = readlink(self, buf, PATH_MAX);
1017 if (len >= 0) {
1018 buf[len] = '\0'; /* readlink doesn't nul terminate */
1019 exec_path = strdup(buf);
1020 }
1021 }
1022 #else /* !__sun && !__linux */
1023 {
1024 /* Not implemented */
1025 }
1026 #endif
1027
1028 if (exec_path == NULL) {
1029 exec_path = FindExecName(argv[0]);
1030 }
1031 execname = exec_path;
1032 return exec_path;
1033 }
1034
1035 /*
1036 * Return the name of the executable. Used in java_md.c to find the JRE area.
1037 */
1038 static char *
1039 GetExecname() {
1040 return execname;
1041 }
1042
1043 void ReportErrorMessage(char * message, jboolean always) {
1044 if (always) {
1045 fprintf(stderr, "%s\n", message);
1046 }
1047 }
1048
1049 void ReportErrorMessage2(char * format, char * string, jboolean always) {
1050 if (always) {
1051 fprintf(stderr, format, string);
1052 fprintf(stderr, "\n");
1053 }
1054 }
1055
1056 void ReportExceptionDescription(JNIEnv * env) {
1057 (*env)->ExceptionDescribe(env);
1058 }
1059
1060 /*
1061 * Return JNI_TRUE for an option string that has no effect but should
1062 * _not_ be passed on to the vm; return JNI_FALSE otherwise. On
1063 * Solaris SPARC, this screening needs to be done if:
1064 * 1) LD_LIBRARY_PATH does _not_ need to be reset and
1065 * 2) -d32 or -d64 is passed to a binary with a matching data model
1066 * (the exec in SetLibraryPath removes -d<n> options and points the
1067 * exec to the proper binary). When this exec is not done, these options
1068 * would end up getting passed onto the vm.
1069 */
1070 jboolean RemovableMachineDependentOption(char * option) {
1071 /*
1072 * Unconditionally remove both -d32 and -d64 options since only
1073 * the last such options has an effect; e.g.
1074 * java -d32 -d64 -d32 -version
1075 * is equivalent to
1076 * java -d32 -version
1077 */
1078
1079 if( (strcmp(option, "-d32") == 0 ) ||
1080 (strcmp(option, "-d64") == 0 ))
1081 return JNI_TRUE;
1082 else
1083 return JNI_FALSE;
1084 }
1085
1086 void PrintMachineDependentOptions() {
1087 fprintf(stdout,
1088 " -d32 use a 32-bit data model if available\n"
1089 "\n"
1090 " -d64 use a 64-bit data model if available\n");
1091 return;
1092 }
1093
1094 #ifndef GAMMA /* gamma launcher does not have ergonomics */
1095
1096 /*
1097 * The following methods (down to ServerClassMachine()) answer
1098 * the question about whether a machine is a "server-class"
1099 * machine. A server-class machine is loosely defined as one
1100 * with 2 or more processors and 2 gigabytes or more physical
1101 * memory. The definition of a processor is a physical package,
1102 * not a hyperthreaded chip masquerading as a multi-processor.
1103 * The definition of memory is also somewhat fuzzy, since x86
1104 * machines seem not to report all the memory in their DIMMs, we
1105 * think because of memory mapping of graphics cards, etc.
1106 *
1107 * This code is somewhat more confused with #ifdef's than we'd
1108 * like because this file is used by both Solaris and Linux
1109 * platforms, and so needs to be parameterized for SPARC and
1110 * i586 hardware. The other Linux platforms (amd64 and ia64)
1111 * don't even ask this question, because they only come with
1112 * server JVMs. */
1113
1114 # define KB (1024UL)
1115 # define MB (1024UL * KB)
1116 # define GB (1024UL * MB)
1117
1118 /* Compute physical memory by asking the OS */
1119 uint64_t
1120 physical_memory(void) {
1121 const uint64_t pages = (uint64_t) sysconf(_SC_PHYS_PAGES);
1122 const uint64_t page_size = (uint64_t) sysconf(_SC_PAGESIZE);
1123 const uint64_t result = pages * page_size;
1124 # define UINT64_FORMAT "%" PRIu64
1125
1126 if (_launcher_debug) {
1127 printf("pages: " UINT64_FORMAT
1128 " page_size: " UINT64_FORMAT
1129 " physical memory: " UINT64_FORMAT " (%.3fGB)\n",
1130 pages, page_size, result, result / (double) GB);
1131 }
1132 return result;
1133 }
1134
1135 #if defined(__sun) && defined(__sparc)
1136
1137 /* Methods for solaris-sparc: these are easy. */
1138
1139 /* Ask the OS how many processors there are. */
1140 unsigned long
1141 physical_processors(void) {
1142 const unsigned long sys_processors = sysconf(_SC_NPROCESSORS_CONF);
1143
1144 if (_launcher_debug) {
1145 printf("sysconf(_SC_NPROCESSORS_CONF): %lu\n", sys_processors);
1146 }
1147 return sys_processors;
1148 }
1149
1150 /* The solaris-sparc version of the "server-class" predicate. */
1151 jboolean
1152 solaris_sparc_ServerClassMachine(void) {
1153 jboolean result = JNI_FALSE;
1154 /* How big is a server class machine? */
1155 const unsigned long server_processors = 2UL;
1156 const uint64_t server_memory = 2UL * GB;
1157 const uint64_t actual_memory = physical_memory();
1158
1159 /* Is this a server class machine? */
1160 if (actual_memory >= server_memory) {
1161 const unsigned long actual_processors = physical_processors();
1162 if (actual_processors >= server_processors) {
1163 result = JNI_TRUE;
1164 }
1165 }
1166 if (_launcher_debug) {
1167 printf("solaris_" ARCH "_ServerClassMachine: %s\n",
1168 (result == JNI_TRUE ? "JNI_TRUE" : "JNI_FALSE"));
1169 }
1170 return result;
1171 }
1172
1173 #endif /* __sun && __sparc */
1174
1175 #if defined(__sun) && defined(i586)
1176
1177 /*
1178 * A utility method for asking the CPU about itself.
1179 * There's a corresponding version of linux-i586
1180 * because the compilers are different.
1181 */
1182 void
1183 get_cpuid(uint32_t arg,
1184 uint32_t* eaxp,
1185 uint32_t* ebxp,
1186 uint32_t* ecxp,
1187 uint32_t* edxp) {
1188 #ifdef _LP64
1189 asm(
1190 /* rbx is a callee-saved register */
1191 " movq %rbx, %r11 \n"
1192 /* rdx and rcx are 3rd and 4th argument registers */
1193 " movq %rdx, %r10 \n"
1194 " movq %rcx, %r9 \n"
1195 " movl %edi, %eax \n"
1196 " cpuid \n"
1197 " movl %eax, (%rsi)\n"
1198 " movl %ebx, (%r10)\n"
1199 " movl %ecx, (%r9) \n"
1200 " movl %edx, (%r8) \n"
1201 /* Restore rbx */
1202 " movq %r11, %rbx");
1203 #else
1204 /* EBX is a callee-saved register */
1205 asm(" pushl %ebx");
1206 /* Need ESI for storing through arguments */
1207 asm(" pushl %esi");
1208 asm(" movl 8(%ebp), %eax \n"
1209 " cpuid \n"
1210 " movl 12(%ebp), %esi \n"
1211 " movl %eax, (%esi) \n"
1212 " movl 16(%ebp), %esi \n"
1213 " movl %ebx, (%esi) \n"
1214 " movl 20(%ebp), %esi \n"
1215 " movl %ecx, (%esi) \n"
1216 " movl 24(%ebp), %esi \n"
1217 " movl %edx, (%esi) ");
1218 /* Restore ESI and EBX */
1219 asm(" popl %esi");
1220 /* Restore EBX */
1221 asm(" popl %ebx");
1222 #endif
1223 }
1224
1225 #endif /* __sun && i586 */
1226
1227 #if defined(__linux__) && defined(i586)
1228
1229 /*
1230 * A utility method for asking the CPU about itself.
1231 * There's a corresponding version of solaris-i586
1232 * because the compilers are different.
1233 */
1234 void
1235 get_cpuid(uint32_t arg,
1236 uint32_t* eaxp,
1237 uint32_t* ebxp,
1238 uint32_t* ecxp,
1239 uint32_t* edxp) {
1240 #ifdef _LP64
1241 __asm__ volatile (/* Instructions */
1242 " movl %4, %%eax \n"
1243 " cpuid \n"
1244 " movl %%eax, (%0)\n"
1245 " movl %%ebx, (%1)\n"
1246 " movl %%ecx, (%2)\n"
1247 " movl %%edx, (%3)\n"
1248 : /* Outputs */
1249 : /* Inputs */
1250 "r" (eaxp),
1251 "r" (ebxp),
1252 "r" (ecxp),
1253 "r" (edxp),
1254 "r" (arg)
1255 : /* Clobbers */
1256 "%rax", "%rbx", "%rcx", "%rdx", "memory"
1257 );
1258 #else
1259 uint32_t value_of_eax = 0;
1260 uint32_t value_of_ebx = 0;
1261 uint32_t value_of_ecx = 0;
1262 uint32_t value_of_edx = 0;
1263 __asm__ volatile (/* Instructions */
1264 /* ebx is callee-save, so push it */
1265 /* even though it's in the clobbers section */
1266 " pushl %%ebx \n"
1267 " movl %4, %%eax \n"
1268 " cpuid \n"
1269 " movl %%eax, %0 \n"
1270 " movl %%ebx, %1 \n"
1271 " movl %%ecx, %2 \n"
1272 " movl %%edx, %3 \n"
1273 /* restore ebx */
1274 " popl %%ebx \n"
1275
1276 : /* Outputs */
1277 "=m" (value_of_eax),
1278 "=m" (value_of_ebx),
1279 "=m" (value_of_ecx),
1280 "=m" (value_of_edx)
1281 : /* Inputs */
1282 "m" (arg)
1283 : /* Clobbers */
1284 "%eax", "%ebx", "%ecx", "%edx"
1285 );
1286 *eaxp = value_of_eax;
1287 *ebxp = value_of_ebx;
1288 *ecxp = value_of_ecx;
1289 *edxp = value_of_edx;
1290 #endif
1291 }
1292
1293 #endif /* __linux__ && i586 */
1294
1295 #ifdef i586
1296 /*
1297 * Routines shared by solaris-i586 and linux-i586.
1298 */
1299
1300 enum HyperThreadingSupport_enum {
1301 hts_supported = 1,
1302 hts_too_soon_to_tell = 0,
1303 hts_not_supported = -1,
1304 hts_not_pentium4 = -2,
1305 hts_not_intel = -3
1306 };
1307 typedef enum HyperThreadingSupport_enum HyperThreadingSupport;
1308
1309 /* Determine if hyperthreading is supported */
1310 HyperThreadingSupport
1311 hyperthreading_support(void) {
1312 HyperThreadingSupport result = hts_too_soon_to_tell;
1313 /* Bits 11 through 8 is family processor id */
1314 # define FAMILY_ID_SHIFT 8
1315 # define FAMILY_ID_MASK 0xf
1316 /* Bits 23 through 20 is extended family processor id */
1317 # define EXT_FAMILY_ID_SHIFT 20
1318 # define EXT_FAMILY_ID_MASK 0xf
1319 /* Pentium 4 family processor id */
1320 # define PENTIUM4_FAMILY_ID 0xf
1321 /* Bit 28 indicates Hyper-Threading Technology support */
1322 # define HT_BIT_SHIFT 28
1323 # define HT_BIT_MASK 1
1324 uint32_t vendor_id[3] = { 0U, 0U, 0U };
1325 uint32_t value_of_eax = 0U;
1326 uint32_t value_of_edx = 0U;
1327 uint32_t dummy = 0U;
1328
1329 /* Yes, this is supposed to be [0], [2], [1] */
1330 get_cpuid(0, &dummy, &vendor_id[0], &vendor_id[2], &vendor_id[1]);
1331 if (_launcher_debug) {
1332 printf("vendor: %c %c %c %c %c %c %c %c %c %c %c %c \n",
1333 ((vendor_id[0] >> 0) & 0xff),
1334 ((vendor_id[0] >> 8) & 0xff),
1335 ((vendor_id[0] >> 16) & 0xff),
1336 ((vendor_id[0] >> 24) & 0xff),
1337 ((vendor_id[1] >> 0) & 0xff),
1338 ((vendor_id[1] >> 8) & 0xff),
1339 ((vendor_id[1] >> 16) & 0xff),
1340 ((vendor_id[1] >> 24) & 0xff),
1341 ((vendor_id[2] >> 0) & 0xff),
1342 ((vendor_id[2] >> 8) & 0xff),
1343 ((vendor_id[2] >> 16) & 0xff),
1344 ((vendor_id[2] >> 24) & 0xff));
1345 }
1346 get_cpuid(1, &value_of_eax, &dummy, &dummy, &value_of_edx);
1347 if (_launcher_debug) {
1348 printf("value_of_eax: 0x%x value_of_edx: 0x%x\n",
1349 value_of_eax, value_of_edx);
1350 }
1351 if ((((value_of_eax >> FAMILY_ID_SHIFT) & FAMILY_ID_MASK) == PENTIUM4_FAMILY_ID) ||
1352 (((value_of_eax >> EXT_FAMILY_ID_SHIFT) & EXT_FAMILY_ID_MASK) != 0)) {
1353 if ((((vendor_id[0] >> 0) & 0xff) == 'G') &&
1354 (((vendor_id[0] >> 8) & 0xff) == 'e') &&
1355 (((vendor_id[0] >> 16) & 0xff) == 'n') &&
1356 (((vendor_id[0] >> 24) & 0xff) == 'u') &&
1357 (((vendor_id[1] >> 0) & 0xff) == 'i') &&
1358 (((vendor_id[1] >> 8) & 0xff) == 'n') &&
1359 (((vendor_id[1] >> 16) & 0xff) == 'e') &&
1360 (((vendor_id[1] >> 24) & 0xff) == 'I') &&
1361 (((vendor_id[2] >> 0) & 0xff) == 'n') &&
1362 (((vendor_id[2] >> 8) & 0xff) == 't') &&
1363 (((vendor_id[2] >> 16) & 0xff) == 'e') &&
1364 (((vendor_id[2] >> 24) & 0xff) == 'l')) {
1365 if (((value_of_edx >> HT_BIT_SHIFT) & HT_BIT_MASK) == HT_BIT_MASK) {
1366 if (_launcher_debug) {
1367 printf("Hyperthreading supported\n");
1368 }
1369 result = hts_supported;
1370 } else {
1371 if (_launcher_debug) {
1372 printf("Hyperthreading not supported\n");
1373 }
1374 result = hts_not_supported;
1375 }
1376 } else {
1377 if (_launcher_debug) {
1378 printf("Not GenuineIntel\n");
1379 }
1380 result = hts_not_intel;
1381 }
1382 } else {
1383 if (_launcher_debug) {
1384 printf("not Pentium 4 or extended\n");
1385 }
1386 result = hts_not_pentium4;
1387 }
1388 return result;
1389 }
1390
1391 /* Determine how many logical processors there are per CPU */
1392 unsigned int
1393 logical_processors_per_package(void) {
1394 /*
1395 * After CPUID with EAX==1, register EBX bits 23 through 16
1396 * indicate the number of logical processors per package
1397 */
1398 # define NUM_LOGICAL_SHIFT 16
1399 # define NUM_LOGICAL_MASK 0xff
1400 unsigned int result = 1U;
1401 const HyperThreadingSupport hyperthreading = hyperthreading_support();
1402
1403 if (hyperthreading == hts_supported) {
1404 uint32_t value_of_ebx = 0U;
1405 uint32_t dummy = 0U;
1406
1407 get_cpuid(1, &dummy, &value_of_ebx, &dummy, &dummy);
1408 result = (value_of_ebx >> NUM_LOGICAL_SHIFT) & NUM_LOGICAL_MASK;
1409 if (_launcher_debug) {
1410 printf("logical processors per package: %u\n", result);
1411 }
1412 }
1413 return result;
1414 }
1415
1416 /* Compute the number of physical processors, not logical processors */
1417 unsigned long
1418 physical_processors(void) {
1419 const long sys_processors = sysconf(_SC_NPROCESSORS_CONF);
1420 unsigned long result = sys_processors;
1421
1422 if (_launcher_debug) {
1423 printf("sysconf(_SC_NPROCESSORS_CONF): %lu\n", sys_processors);
1424 }
1425 if (sys_processors > 1) {
1426 unsigned int logical_processors = logical_processors_per_package();
1427 if (logical_processors > 1) {
1428 result = (unsigned long) sys_processors / logical_processors;
1429 }
1430 }
1431 if (_launcher_debug) {
1432 printf("physical processors: %lu\n", result);
1433 }
1434 return result;
1435 }
1436
1437 #endif /* i586 */
1438
1439 #if defined(__sun) && defined(i586)
1440
1441 /* The definition of a server-class machine for solaris-i586/amd64 */
1442 jboolean
1443 solaris_i586_ServerClassMachine(void) {
1444 jboolean result = JNI_FALSE;
1445 /* How big is a server class machine? */
1446 const unsigned long server_processors = 2UL;
1447 const uint64_t server_memory = 2UL * GB;
1448 /*
1449 * We seem not to get our full complement of memory.
1450 * We allow some part (1/8?) of the memory to be "missing",
1451 * based on the sizes of DIMMs, and maybe graphics cards.
1452 */
1453 const uint64_t missing_memory = 256UL * MB;
1454 const uint64_t actual_memory = physical_memory();
1455
1456 /* Is this a server class machine? */
1457 if (actual_memory >= (server_memory - missing_memory)) {
1458 const unsigned long actual_processors = physical_processors();
1459 if (actual_processors >= server_processors) {
1460 result = JNI_TRUE;
1461 }
1462 }
1463 if (_launcher_debug) {
1464 printf("solaris_" ARCH "_ServerClassMachine: %s\n",
1465 (result == JNI_TRUE ? "true" : "false"));
1466 }
1467 return result;
1468 }
1469
1470 #endif /* __sun && i586 */
1471
1472 #if defined(__linux__) && defined(i586)
1473
1474 /* The definition of a server-class machine for linux-i586 */
1475 jboolean
1476 linux_i586_ServerClassMachine(void) {
1477 jboolean result = JNI_FALSE;
1478 /* How big is a server class machine? */
1479 const unsigned long server_processors = 2UL;
1480 const uint64_t server_memory = 2UL * GB;
1481 /*
1482 * We seem not to get our full complement of memory.
1483 * We allow some part (1/8?) of the memory to be "missing",
1484 * based on the sizes of DIMMs, and maybe graphics cards.
1485 */
1486 const uint64_t missing_memory = 256UL * MB;
1487 const uint64_t actual_memory = physical_memory();
1488
1489 /* Is this a server class machine? */
1490 if (actual_memory >= (server_memory - missing_memory)) {
1491 const unsigned long actual_processors = physical_processors();
1492 if (actual_processors >= server_processors) {
1493 result = JNI_TRUE;
1494 }
1495 }
1496 if (_launcher_debug) {
1497 printf("linux_" ARCH "_ServerClassMachine: %s\n",
1498 (result == JNI_TRUE ? "true" : "false"));
1499 }
1500 return result;
1501 }
1502
1503 #endif /* __linux__ && i586 */
1504
1505 /* Dispatch to the platform-specific definition of "server-class" */
1506 jboolean
1507 ServerClassMachine(void) {
1508 jboolean result = JNI_FALSE;
1509 #if defined(__sun) && defined(__sparc)
1510 result = solaris_sparc_ServerClassMachine();
1511 #elif defined(__sun) && defined(i586)
1512 result = solaris_i586_ServerClassMachine();
1513 #elif defined(__linux__) && defined(i586)
1514 result = linux_i586_ServerClassMachine();
1515 #else
1516 if (_launcher_debug) {
1517 printf("ServerClassMachine: returns default value of %s\n",
1518 (result == JNI_TRUE ? "true" : "false"));
1519 }
1520 #endif
1521 return result;
1522 }
1523
1524 #endif /* ifndef GAMMA */
1525
1526 #ifndef GAMMA /* gamma launcher does not choose JDK/JRE/JVM */
1527
1528 /*
1529 * Since using the file system as a registry is a bit risky, perform
1530 * additional sanity checks on the identified directory to validate
1531 * it as a valid jre/sdk.
1532 *
1533 * Return 0 if the tests fail; otherwise return non-zero (true).
1534 *
1535 * Note that checking for anything more than the existence of an
1536 * executable object at bin/java relative to the path being checked
1537 * will break the regression tests.
1538 */
1539 static int
1540 CheckSanity(char *path, char *dir)
1541 {
1542 char buffer[PATH_MAX];
1543
1544 if (strlen(path) + strlen(dir) + 11 > PATH_MAX)
1545 return (0); /* Silently reject "impossibly" long paths */
1546
1547 (void)strcat(strcat(strcat(strcpy(buffer, path), "/"), dir), "/bin/java");
1548 return ((access(buffer, X_OK) == 0) ? 1 : 0);
1549 }
1550
1551 /*
1552 * Determine if there is an acceptable JRE in the directory dirname.
1553 * Upon locating the "best" one, return a fully qualified path to
1554 * it. "Best" is defined as the most advanced JRE meeting the
1555 * constraints contained in the manifest_info. If no JRE in this
1556 * directory meets the constraints, return NULL.
1557 *
1558 * Note that we don't check for errors in reading the directory
1559 * (which would be done by checking errno). This is because it
1560 * doesn't matter if we get an error reading the directory, or
1561 * we just don't find anything interesting in the directory. We
1562 * just return NULL in either case.
1563 *
1564 * The historical names of j2sdk and j2re were changed to jdk and
1565 * jre respecively as part of the 1.5 rebranding effort. Since the
1566 * former names are legacy on Linux, they must be recognized for
1567 * all time. Fortunately, this is a minor cost.
1568 */
1569 static char
1570 *ProcessDir(manifest_info *info, char *dirname)
1571 {
1572 DIR *dirp;
1573 struct dirent *dp;
1574 char *best = NULL;
1575 int offset;
1576 int best_offset = 0;
1577 char *ret_str = NULL;
1578 char buffer[PATH_MAX];
1579
1580 if ((dirp = opendir(dirname)) == NULL)
1581 return (NULL);
1582
1583 do {
1584 if ((dp = readdir(dirp)) != NULL) {
1585 offset = 0;
1586 if ((strncmp(dp->d_name, "jre", 3) == 0) ||
1587 (strncmp(dp->d_name, "jdk", 3) == 0))
1588 offset = 3;
1589 else if (strncmp(dp->d_name, "j2re", 4) == 0)
1590 offset = 4;
1591 else if (strncmp(dp->d_name, "j2sdk", 5) == 0)
1592 offset = 5;
1593 if (offset > 0) {
1594 if ((acceptable_release(dp->d_name + offset,
1595 info->jre_version)) && CheckSanity(dirname, dp->d_name))
1596 if ((best == NULL) || (exact_version_id(
1597 dp->d_name + offset, best + best_offset) > 0)) {
1598 if (best != NULL)
1599 free(best);
1600 best = strdup(dp->d_name);
1601 best_offset = offset;
1602 }
1603 }
1604 }
1605 } while (dp != NULL);
1606 (void) closedir(dirp);
1607 if (best == NULL)
1608 return (NULL);
1609 else {
1610 ret_str = MemAlloc(strlen(dirname) + strlen(best) + 2);
1611 ret_str = strcat(strcat(strcpy(ret_str, dirname), "/"), best);
1612 free(best);
1613 return (ret_str);
1614 }
1615 }
1616
1617 /*
1618 * This is the global entry point. It examines the host for the optimal
1619 * JRE to be used by scanning a set of directories. The set of directories
1620 * is platform dependent and can be overridden by the environment
1621 * variable JAVA_VERSION_PATH.
1622 *
1623 * This routine itself simply determines the set of appropriate
1624 * directories before passing control onto ProcessDir().
1625 */
1626 char*
1627 LocateJRE(manifest_info* info)
1628 {
1629 char *path;
1630 char *home;
1631 char *target = NULL;
1632 char *dp;
1633 char *cp;
1634
1635 /*
1636 * Start by getting JAVA_VERSION_PATH
1637 */
1638 if (info->jre_restrict_search)
1639 path = strdup(system_dir);
1640 else if ((path = getenv("JAVA_VERSION_PATH")) != NULL)
1641 path = strdup(path);
1642 else
1643 if ((home = getenv("HOME")) != NULL) {
1644 path = (char *)MemAlloc(strlen(home) + 13);
1645 path = strcat(strcat(strcat(strcpy(path, home),
1646 user_dir), ":"), system_dir);
1647 } else
1648 path = strdup(system_dir);
1649
1650 /*
1651 * Step through each directory on the path. Terminate the scan with
1652 * the first directory with an acceptable JRE.
1653 */
1654 cp = dp = path;
1655 while (dp != NULL) {
1656 cp = strchr(dp, (int)':');
1657 if (cp != NULL)
1658 *cp = (char)NULL;
1659 if ((target = ProcessDir(info, dp)) != NULL)
1660 break;
1661 dp = cp;
1662 if (dp != NULL)
1663 dp++;
1664 }
1665 free(path);
1666 return (target);
1667 }
1668
1669 /*
1670 * Given a path to a jre to execute, this routine checks if this process
1671 * is indeed that jre. If not, it exec's that jre.
1672 *
1673 * We want to actually check the paths rather than just the version string
1674 * built into the executable, so that given version specification (and
1675 * JAVA_VERSION_PATH) will yield the exact same Java environment, regardless
1676 * of the version of the arbitrary launcher we start with.
1677 */
1678 void
1679 ExecJRE(char *jre, char **argv)
1680 {
1681 char wanted[PATH_MAX];
1682 char *execname;
1683 char *progname;
1684
1685 /*
1686 * Resolve the real path to the directory containing the selected JRE.
1687 */
1688 if (realpath(jre, wanted) == NULL) {
1689 fprintf(stderr, "Unable to resolve %s\n", jre);
1690 exit(1);
1691 }
1692
1693 /*
1694 * Resolve the real path to the currently running launcher.
1695 */
1696 execname = SetExecname(argv);
1697 if (execname == NULL) {
1698 fprintf(stderr, "Unable to resolve current executable\n");
1699 exit(1);
1700 }
1701
1702 /*
1703 * If the path to the selected JRE directory is a match to the initial
1704 * portion of the path to the currently executing JRE, we have a winner!
1705 * If so, just return.
1706 */
1707 if (strncmp(wanted, execname, strlen(wanted)) == 0)
1708 return; /* I am the droid you were looking for */
1709
1710 /*
1711 * If this isn't the selected version, exec the selected version.
1712 */
1713 #ifdef JAVA_ARGS /* javac, jar and friends. */
1714 progname = "java";
1715 #else /* java, oldjava, javaw and friends */
1716 #ifdef PROGNAME
1717 progname = PROGNAME;
1718 #else
1719 progname = *argv;
1720 if ((s = strrchr(progname, FILE_SEPARATOR)) != 0) {
1721 progname = s + 1;
1722 }
1723 #endif /* PROGNAME */
1724 #endif /* JAVA_ARGS */
1725
1726 /*
1727 * This should never happen (because of the selection code in SelectJRE),
1728 * but check for "impossibly" long path names just because buffer overruns
1729 * can be so deadly.
1730 */
1731 if (strlen(wanted) + strlen(progname) + 6 > PATH_MAX) {
1732 fprintf(stderr, "Path length exceeds maximum length (PATH_MAX)\n");
1733 exit(1);
1734 }
1735
1736 /*
1737 * Construct the path and exec it.
1738 */
1739 (void)strcat(strcat(wanted, "/bin/"), progname);
1740 argv[0] = progname;
1741 if (_launcher_debug) {
1742 int i;
1743 printf("execv(\"%s\"", wanted);
1744 for (i = 0; argv[i] != NULL; i++)
1745 printf(", \"%s\"", argv[i]);
1746 printf(")\n");
1747 }
1748 execv(wanted, argv);
1749 fprintf(stderr, "Exec of %s failed\n", wanted);
1750 exit(1);
1751 }
1752
1753 #endif /* ifndef GAMMA */
1754
1755 /*
1756 * "Borrowed" from Solaris 10 where the unsetenv() function is being added
1757 * to libc thanks to SUSv3 (Standard Unix Specification, version 3). As
1758 * such, in the fullness of time this will appear in libc on all relevant
1759 * Solaris/Linux platforms and maybe even the Windows platform. At that
1760 * time, this stub can be removed.
1761 *
1762 * This implementation removes the environment locking for multithreaded
1763 * applications. (We don't have access to these mutexes within libc and
1764 * the launcher isn't multithreaded.) Note that what remains is platform
1765 * independent, because it only relies on attributes that a POSIX environment
1766 * defines.
1767 *
1768 * Returns 0 on success, -1 on failure.
1769 *
1770 * Also removed was the setting of errno. The only value of errno set
1771 * was EINVAL ("Invalid Argument").
1772 */
1773
1774 /*
1775 * s1(environ) is name=value
1776 * s2(name) is name(not the form of name=value).
1777 * if names match, return value of 1, else return 0
1778 */
1779 static int
1780 match_noeq(const char *s1, const char *s2)
1781 {
1782 while (*s1 == *s2++) {
1783 if (*s1++ == '=')
1784 return (1);
1785 }
1786 if (*s1 == '=' && s2[-1] == '\0')
1787 return (1);
1788 return (0);
1789 }
1790
1791 /*
1792 * added for SUSv3 standard
1793 *
1794 * Delete entry from environ.
1795 * Do not free() memory! Other threads may be using it.
1796 * Keep it around forever.
1797 */
1798 static int
1799 borrowed_unsetenv(const char *name)
1800 {
1801 long idx; /* index into environ */
1802
1803 if (name == NULL || *name == '\0' ||
1804 strchr(name, '=') != NULL) {
1805 return (-1);
1806 }
1807
1808 for (idx = 0; environ[idx] != NULL; idx++) {
1809 if (match_noeq(environ[idx], name))
1810 break;
1811 }
1812 if (environ[idx] == NULL) {
1813 /* name not found but still a success */
1814 return (0);
1815 }
1816 /* squeeze up one entry */
1817 do {
1818 environ[idx] = environ[idx+1];
1819 } while (environ[++idx] != NULL);
1820
1821 return (0);
1822 }
1823 /* --- End of "borrowed" code --- */
1824
1825 /*
1826 * Wrapper for unsetenv() function.
1827 */
1828 int
1829 UnsetEnv(char *name)
1830 {
1831 return(borrowed_unsetenv(name));
1832 }
1833 /*
1834 * The implementation for finding classes from the bootstrap
1835 * class loader, refer to java.h
1836 */
1837 static FindClassFromBootLoader_t *findBootClass = NULL;
1838
1839 jclass
1840 FindBootStrapClass(JNIEnv *env, const char* classname)
1841 {
1842 if (findBootClass == NULL) {
1843 findBootClass = (FindClassFromBootLoader_t *)dlsym(RTLD_DEFAULT,
1844 "JVM_FindClassFromBootLoader");
1845 if (findBootClass == NULL) {
1846 fprintf(stderr, "Error: could load method JVM_FindClassFromBootLoader");
1847 return NULL;
1848 }
1849 }
1850 return findBootClass(env, classname, JNI_FALSE);
1851 }
1852