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src/os/posix/launcher/java_md.c@e8a4934564b2
src/os/posix/launcher/java_md.c
Tue, 24 Jan 2012 19:33:14 -0500
- author
- phh
- date
- Tue, 24 Jan 2012 19:33:14 -0500
- changeset 3473
- e8a4934564b2
- parent 3156
- f08d439fab8c
- child 4153
- b9a9ed0f8eeb
- permissions
- -rw-r--r--
7125793: MAC: test_gamma should always work
Summary: Fix gamma launcher on Mac OS X and reconcile test_gamma script on Unix platforms
Reviewed-by: dcubed, ohair, jcoomes, dholmes, ksrini
Contributed-by: james.melvin@oracle.com
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 */
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>
39 #ifndef GAMMA
40 #include "manifest_info.h"
41 #include "version_comp.h"
42 #endif
44 #if defined(__linux__) || defined(_ALLBSD_SOURCE)
45 #include <pthread.h>
46 #else
47 #include <thread.h>
48 #endif
50 #ifdef __APPLE__
51 #define JVM_DLL "libjvm.dylib"
52 #define JAVA_DLL "libjava.dylib"
53 #define LD_LIBRARY_PATH "DYLD_LIBRARY_PATH"
54 #else
55 #define JVM_DLL "libjvm.so"
56 #define JAVA_DLL "libjava.so"
57 #define LD_LIBRARY_PATH "LD_LIBRARY_PATH"
58 #endif
60 #ifndef GAMMA /* launcher.make defines ARCH */
61 /*
62 * If a processor / os combination has the ability to run binaries of
63 * two data models and cohabitation of jre/jdk bits with both data
64 * models is supported, then DUAL_MODE is defined. When DUAL_MODE is
65 * defined, the architecture names for the narrow and wide version of
66 * the architecture are defined in LIBARCH64NAME and LIBARCH32NAME. Currently
67 * only Solaris on sparc/sparcv9 and i586/amd64 is DUAL_MODE; linux
68 * i586/amd64 could be defined as DUAL_MODE but that is not the
69 * current policy.
70 */
72 #ifndef LIBARCHNAME
73 # error "The macro LIBARCHNAME was not defined on the compile line"
74 #endif
76 #ifdef __sun
77 # define DUAL_MODE
78 # ifndef LIBARCH32NAME
79 # error "The macro LIBARCH32NAME was not defined on the compile line"
80 # endif
81 # ifndef LIBARCH64NAME
82 # error "The macro LIBARCH64NAME was not defined on the compile line"
83 # endif
84 # include <sys/systeminfo.h>
85 # include <sys/elf.h>
86 # include <stdio.h>
87 #endif
89 #endif /* ifndef GAMMA */
91 /* pointer to environment */
92 extern char **environ;
94 #ifndef GAMMA
95 /*
96 * A collection of useful strings. One should think of these as #define
97 * entries, but actual strings can be more efficient (with many compilers).
98 */
99 #ifdef __linux__
100 static const char *system_dir = "/usr/java";
101 static const char *user_dir = "/java";
102 #else /* Solaris */
103 static const char *system_dir = "/usr/jdk";
104 static const char *user_dir = "/jdk";
105 #endif
107 #endif /* ifndef GAMMA */
109 /*
110 * Flowchart of launcher execs and options processing on unix
111 *
112 * The selection of the proper vm shared library to open depends on
113 * several classes of command line options, including vm "flavor"
114 * options (-client, -server) and the data model options, -d32 and
115 * -d64, as well as a version specification which may have come from
116 * the command line or from the manifest of an executable jar file.
117 * The vm selection options are not passed to the running
118 * virtual machine; they must be screened out by the launcher.
119 *
120 * The version specification (if any) is processed first by the
121 * platform independent routine SelectVersion. This may result in
122 * the exec of the specified launcher version.
123 *
124 * Typically, the launcher execs at least once to ensure a suitable
125 * LD_LIBRARY_PATH is in effect for the process. The first exec
126 * screens out all the data model options; leaving the choice of data
127 * model implicit in the binary selected to run. However, in case no
128 * exec is done, the data model options are screened out before the vm
129 * is invoked.
130 *
131 * incoming argv ------------------------------
132 * | |
133 * \|/ |
134 * CheckJVMType |
135 * (removes -client, -server, etc.) |
136 * \|/
137 * CreateExecutionEnvironment
138 * (removes -d32 and -d64,
139 * determines desired data model,
140 * sets up LD_LIBRARY_PATH,
141 * and exec's)
142 * |
143 * --------------------------------------------
144 * |
145 * \|/
146 * exec child 1 incoming argv -----------------
147 * | |
148 * \|/ |
149 * CheckJVMType |
150 * (removes -client, -server, etc.) |
151 * | \|/
152 * | CreateExecutionEnvironment
153 * | (verifies desired data model
154 * | is running and acceptable
155 * | LD_LIBRARY_PATH;
156 * | no-op in child)
157 * |
158 * \|/
159 * TranslateDashJArgs...
160 * (Prepare to pass args to vm)
161 * |
162 * |
163 * |
164 * \|/
165 * ParseArguments
166 * (ignores -d32 and -d64,
167 * processes version options,
168 * creates argument list for vm,
169 * etc.)
170 *
171 */
173 static char *SetExecname(char **argv);
174 static char * GetExecname();
175 static jboolean GetJVMPath(const char *jrepath, const char *jvmtype,
176 char *jvmpath, jint jvmpathsize, char * arch);
177 static jboolean GetJREPath(char *path, jint pathsize, char * arch, jboolean speculative);
179 #ifndef GAMMA
180 const char *
181 GetArch()
182 {
183 return LIBARCHNAME;
184 }
185 #endif /* ifndef GAMMA */
187 void
188 CreateExecutionEnvironment(int *_argcp,
189 char ***_argvp,
190 char jrepath[],
191 jint so_jrepath,
192 char jvmpath[],
193 jint so_jvmpath,
194 char **original_argv) {
195 /*
196 * First, determine if we are running the desired data model. If we
197 * are running the desired data model, all the error messages
198 * associated with calling GetJREPath, ReadKnownVMs, etc. should be
199 * output. However, if we are not running the desired data model,
200 * some of the errors should be suppressed since it is more
201 * informative to issue an error message based on whether or not the
202 * os/processor combination has dual mode capabilities.
203 */
205 char *execname = NULL;
206 int original_argc = *_argcp;
207 jboolean jvmpathExists;
209 /* Compute the name of the executable */
210 execname = SetExecname(*_argvp);
212 #ifndef GAMMA
213 /* Set the LD_LIBRARY_PATH environment variable, check data model
214 flags, and exec process, if needed */
215 {
216 char *arch = (char *)GetArch(); /* like sparc or sparcv9 */
217 char * jvmtype = NULL;
218 int argc = *_argcp;
219 char **argv = original_argv;
221 char *runpath = NULL; /* existing effective LD_LIBRARY_PATH
222 setting */
224 int running = /* What data model is being ILP32 =>
225 32 bit vm; LP64 => 64 bit vm */
226 #ifdef _LP64
227 64;
228 #else
229 32;
230 #endif
232 int wanted = running; /* What data mode is being
233 asked for? Current model is
234 fine unless another model
235 is asked for */
237 char* new_runpath = NULL; /* desired new LD_LIBRARY_PATH string */
238 char* newpath = NULL; /* path on new LD_LIBRARY_PATH */
239 char* lastslash = NULL;
241 char** newenvp = NULL; /* current environment */
243 char** newargv = NULL;
244 int newargc = 0;
245 #ifdef __sun
246 char* dmpath = NULL; /* data model specific LD_LIBRARY_PATH,
247 Solaris only */
248 #endif
250 /*
251 * Starting in 1.5, all unix platforms accept the -d32 and -d64
252 * options. On platforms where only one data-model is supported
253 * (e.g. ia-64 Linux), using the flag for the other data model is
254 * an error and will terminate the program.
255 */
257 { /* open new scope to declare local variables */
258 int i;
260 newargv = (char **)JLI_MemAlloc((argc+1) * sizeof(*newargv));
261 newargv[newargc++] = argv[0];
263 /* scan for data model arguments and remove from argument list;
264 last occurrence determines desired data model */
265 for (i=1; i < argc; i++) {
267 if (strcmp(argv[i], "-J-d64") == 0 || strcmp(argv[i], "-d64") == 0) {
268 wanted = 64;
269 continue;
270 }
271 if (strcmp(argv[i], "-J-d32") == 0 || strcmp(argv[i], "-d32") == 0) {
272 wanted = 32;
273 continue;
274 }
275 newargv[newargc++] = argv[i];
277 #ifdef JAVA_ARGS
278 if (argv[i][0] != '-')
279 continue;
280 #else
281 if (strcmp(argv[i], "-classpath") == 0 || strcmp(argv[i], "-cp") == 0) {
282 i++;
283 if (i >= argc) break;
284 newargv[newargc++] = argv[i];
285 continue;
286 }
287 if (argv[i][0] != '-') { i++; break; }
288 #endif
289 }
291 /* copy rest of args [i .. argc) */
292 while (i < argc) {
293 newargv[newargc++] = argv[i++];
294 }
295 newargv[newargc] = NULL;
297 /*
298 * newargv has all proper arguments here
299 */
301 argc = newargc;
302 argv = newargv;
303 }
305 /* If the data model is not changing, it is an error if the
306 jvmpath does not exist */
307 if (wanted == running) {
308 /* Find out where the JRE is that we will be using. */
309 if (!GetJREPath(jrepath, so_jrepath, arch, JNI_FALSE) ) {
310 fprintf(stderr, "Error: could not find Java 2 Runtime Environment.\n");
311 exit(2);
312 }
314 /* Find the specified JVM type */
315 if (ReadKnownVMs(jrepath, arch, JNI_FALSE) < 1) {
316 fprintf(stderr, "Error: no known VMs. (check for corrupt jvm.cfg file)\n");
317 exit(1);
318 }
320 jvmpath[0] = '\0';
321 jvmtype = CheckJvmType(_argcp, _argvp, JNI_FALSE);
323 if (!GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath, arch )) {
324 fprintf(stderr, "Error: no `%s' JVM at `%s'.\n", jvmtype, jvmpath);
325 exit(4);
326 }
327 } else { /* do the same speculatively or exit */
328 #ifdef DUAL_MODE
329 if (running != wanted) {
330 /* Find out where the JRE is that we will be using. */
331 if (!GetJREPath(jrepath, so_jrepath, ((wanted==64)?LIBARCH64NAME:LIBARCH32NAME), JNI_TRUE)) {
332 goto EndDataModelSpeculate;
333 }
335 /*
336 * Read in jvm.cfg for target data model and process vm
337 * selection options.
338 */
339 if (ReadKnownVMs(jrepath, ((wanted==64)?LIBARCH64NAME:LIBARCH32NAME), JNI_TRUE) < 1) {
340 goto EndDataModelSpeculate;
341 }
342 jvmpath[0] = '\0';
343 jvmtype = CheckJvmType(_argcp, _argvp, JNI_TRUE);
344 /* exec child can do error checking on the existence of the path */
345 jvmpathExists = GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath,
346 ((wanted==64)?LIBARCH64NAME:LIBARCH32NAME));
348 }
349 EndDataModelSpeculate: /* give up and let other code report error message */
350 ;
351 #else
352 fprintf(stderr, "Running a %d-bit JVM is not supported on this platform.\n", wanted);
353 exit(1);
354 #endif
355 }
357 /*
358 * We will set the LD_LIBRARY_PATH as follows:
359 *
360 * o $JVMPATH (directory portion only)
361 * o $JRE/lib/$LIBARCHNAME
362 * o $JRE/../lib/$LIBARCHNAME
363 *
364 * followed by the user's previous effective LD_LIBRARY_PATH, if
365 * any.
366 */
368 #ifdef __sun
369 /*
370 * Starting in Solaris 7, ld.so.1 supports three LD_LIBRARY_PATH
371 * variables:
372 *
373 * 1. LD_LIBRARY_PATH -- used for 32 and 64 bit searches if
374 * data-model specific variables are not set.
375 *
376 * 2. LD_LIBRARY_PATH_64 -- overrides and replaces LD_LIBRARY_PATH
377 * for 64-bit binaries.
378 *
379 * 3. LD_LIBRARY_PATH_32 -- overrides and replaces LD_LIBRARY_PATH
380 * for 32-bit binaries.
381 *
382 * The vm uses LD_LIBRARY_PATH to set the java.library.path system
383 * property. To shield the vm from the complication of multiple
384 * LD_LIBRARY_PATH variables, if the appropriate data model
385 * specific variable is set, we will act as if LD_LIBRARY_PATH had
386 * the value of the data model specific variant and the data model
387 * specific variant will be unset. Note that the variable for the
388 * *wanted* data model must be used (if it is set), not simply the
389 * current running data model.
390 */
392 switch(wanted) {
393 case 0:
394 if(running == 32) {
395 dmpath = getenv("LD_LIBRARY_PATH_32");
396 wanted = 32;
397 }
398 else {
399 dmpath = getenv("LD_LIBRARY_PATH_64");
400 wanted = 64;
401 }
402 break;
404 case 32:
405 dmpath = getenv("LD_LIBRARY_PATH_32");
406 break;
408 case 64:
409 dmpath = getenv("LD_LIBRARY_PATH_64");
410 break;
412 default:
413 fprintf(stderr, "Improper value at line %d.", __LINE__);
414 exit(1); /* unknown value in wanted */
415 break;
416 }
418 /*
419 * If dmpath is NULL, the relevant data model specific variable is
420 * not set and normal LD_LIBRARY_PATH should be used.
421 */
422 if( dmpath == NULL) {
423 runpath = getenv("LD_LIBRARY_PATH");
424 }
425 else {
426 runpath = dmpath;
427 }
428 #else
429 /*
430 * If not on Solaris, assume only a single LD_LIBRARY_PATH
431 * variable.
432 */
433 runpath = getenv(LD_LIBRARY_PATH);
434 #endif /* __sun */
436 #if defined(__linux__)
437 /*
438 * On linux, if a binary is running as sgid or suid, glibc sets
439 * LD_LIBRARY_PATH to the empty string for security purposes. (In
440 * contrast, on Solaris the LD_LIBRARY_PATH variable for a
441 * privileged binary does not lose its settings; but the dynamic
442 * linker does apply more scrutiny to the path.) The launcher uses
443 * the value of LD_LIBRARY_PATH to prevent an exec loop.
444 * Therefore, if we are running sgid or suid, this function's
445 * setting of LD_LIBRARY_PATH will be ineffective and we should
446 * return from the function now. Getting the right libraries to
447 * be found must be handled through other mechanisms.
448 */
449 if((getgid() != getegid()) || (getuid() != geteuid()) ) {
450 return;
451 }
452 #elif defined(_ALLBSD_SOURCE)
453 /*
454 * On BSD, if a binary is running as sgid or suid, libc sets
455 * LD_LIBRARY_PATH to the empty string for security purposes. (In
456 * contrast, on Solaris the LD_LIBRARY_PATH variable for a
457 * privileged binary does not lose its settings; but the dynamic
458 * linker does apply more scrutiny to the path.) The launcher uses
459 * the value of LD_LIBRARY_PATH to prevent an exec loop.
460 * Therefore, if we are running sgid or suid, this function's
461 * setting of LD_LIBRARY_PATH will be ineffective and we should
462 * return from the function now. Getting the right libraries to
463 * be found must be handled through other mechanisms.
464 */
465 if(issetugid()) {
466 return;
467 }
468 #endif
470 /* runpath contains current effective LD_LIBRARY_PATH setting */
472 jvmpath = JLI_StringDup(jvmpath);
473 new_runpath = JLI_MemAlloc( ((runpath!=NULL)?strlen(runpath):0) +
474 2*strlen(jrepath) + 2*strlen(arch) +
475 strlen(jvmpath) + 52);
476 newpath = new_runpath + strlen(LD_LIBRARY_PATH "=");
479 /*
480 * Create desired LD_LIBRARY_PATH value for target data model.
481 */
482 {
483 /* remove the name of the .so from the JVM path */
484 lastslash = strrchr(jvmpath, '/');
485 if (lastslash)
486 *lastslash = '\0';
489 /* jvmpath, ((running != wanted)?((wanted==64)?"/"LIBARCH64NAME:"/.."):""), */
491 sprintf(new_runpath, LD_LIBRARY_PATH "="
492 "%s:"
493 "%s/lib/%s:"
494 "%s/../lib/%s",
495 jvmpath,
496 #ifdef DUAL_MODE
497 jrepath, ((wanted==64)?LIBARCH64NAME:LIBARCH32NAME),
498 jrepath, ((wanted==64)?LIBARCH64NAME:LIBARCH32NAME)
499 #else
500 jrepath, arch,
501 jrepath, arch
502 #endif
503 );
506 /*
507 * Check to make sure that the prefix of the current path is the
508 * desired environment variable setting.
509 */
510 if (runpath != NULL &&
511 strncmp(newpath, runpath, strlen(newpath))==0 &&
512 (runpath[strlen(newpath)] == 0 || runpath[strlen(newpath)] == ':') &&
513 (running == wanted) /* data model does not have to be changed */
514 #ifdef __sun
515 && (dmpath == NULL) /* data model specific variables not set */
516 #endif
517 ) {
519 return;
521 }
522 }
524 /*
525 * Place the desired environment setting onto the prefix of
526 * LD_LIBRARY_PATH. Note that this prevents any possible infinite
527 * loop of execv() because we test for the prefix, above.
528 */
529 if (runpath != 0) {
530 strcat(new_runpath, ":");
531 strcat(new_runpath, runpath);
532 }
534 if( putenv(new_runpath) != 0) {
535 exit(1); /* problem allocating memory; LD_LIBRARY_PATH not set
536 properly */
537 }
539 /*
540 * Unix systems document that they look at LD_LIBRARY_PATH only
541 * once at startup, so we have to re-exec the current executable
542 * to get the changed environment variable to have an effect.
543 */
545 #ifdef __sun
546 /*
547 * If dmpath is not NULL, remove the data model specific string
548 * in the environment for the exec'ed child.
549 */
551 if( dmpath != NULL)
552 (void)UnsetEnv((wanted==32)?"LD_LIBRARY_PATH_32":"LD_LIBRARY_PATH_64");
553 #endif
555 newenvp = environ;
557 {
558 char *newexec = execname;
559 #ifdef DUAL_MODE
560 /*
561 * If the data model is being changed, the path to the
562 * executable must be updated accordingly; the executable name
563 * and directory the executable resides in are separate. In the
564 * case of 32 => 64, the new bits are assumed to reside in, e.g.
565 * "olddir/LIBARCH64NAME/execname"; in the case of 64 => 32,
566 * the bits are assumed to be in "olddir/../execname". For example,
567 *
568 * olddir/sparcv9/execname
569 * olddir/amd64/execname
570 *
571 * for Solaris SPARC and Linux amd64, respectively.
572 */
574 if (running != wanted) {
575 char *oldexec = strcpy(JLI_MemAlloc(strlen(execname) + 1), execname);
576 char *olddir = oldexec;
577 char *oldbase = strrchr(oldexec, '/');
580 newexec = JLI_MemAlloc(strlen(execname) + 20);
581 *oldbase++ = 0;
582 sprintf(newexec, "%s/%s/%s", olddir,
583 ((wanted==64) ? LIBARCH64NAME : ".."), oldbase);
584 argv[0] = newexec;
585 }
586 #endif
588 (void)fflush(stdout);
589 (void)fflush(stderr);
590 execve(newexec, argv, newenvp);
591 perror("execve()");
593 fprintf(stderr, "Error trying to exec %s.\n", newexec);
594 fprintf(stderr, "Check if file exists and permissions are set correctly.\n");
596 #ifdef DUAL_MODE
597 if (running != wanted) {
598 fprintf(stderr, "Failed to start a %d-bit JVM process from a %d-bit JVM.\n",
599 wanted, running);
600 # ifdef __sun
602 # ifdef __sparc
603 fprintf(stderr, "Verify all necessary J2SE components have been installed.\n" );
604 fprintf(stderr,
605 "(Solaris SPARC 64-bit components must be installed after 32-bit components.)\n" );
606 # else
607 fprintf(stderr, "Either 64-bit processes are not supported by this platform\n");
608 fprintf(stderr, "or the 64-bit components have not been installed.\n");
609 # endif
610 }
611 # endif
612 #endif
614 }
616 exit(1);
617 }
619 #else /* ifndef GAMMA */
621 /*
622 * gamma launcher is simpler in that it doesn't handle VM flavors, data
623 * model, LD_LIBRARY_PATH, etc. Assuming everything is set-up correctly
624 * all we need to do here is to return correct path names. See also
625 * GetJVMPath() and GetApplicationHome().
626 */
628 { char *arch = (char *) ARCH; /* like sparc or sparcv9 */
629 char *p;
631 if (!GetJREPath(jrepath, so_jrepath, arch, JNI_FALSE) ) {
632 fprintf(stderr, "Error: could not find Java 2 Runtime Environment.\n");
633 exit(2);
634 }
636 if (!GetJVMPath(jrepath, NULL, jvmpath, so_jvmpath, arch )) {
637 fprintf(stderr, "Error: no JVM at `%s'.\n", jvmpath);
638 exit(4);
639 }
640 }
642 #endif /* ifndef GAMMA */
643 }
646 /*
647 * On Solaris VM choosing is done by the launcher (java.c).
648 */
649 static jboolean
650 GetJVMPath(const char *jrepath, const char *jvmtype,
651 char *jvmpath, jint jvmpathsize, char * arch)
652 {
653 struct stat s;
655 #ifndef GAMMA
656 if (strchr(jvmtype, '/')) {
657 sprintf(jvmpath, "%s/" JVM_DLL, jvmtype);
658 } else {
659 sprintf(jvmpath, "%s/lib/%s/%s/" JVM_DLL, jrepath, arch, jvmtype);
660 }
661 #else
662 /*
663 * For gamma launcher, JVM is either built-in or in the same directory.
664 * Either way we return "<exe_path>/libjvm.so" where <exe_path> is the
665 * directory where gamma launcher is located.
666 */
668 char *p;
670 snprintf(jvmpath, jvmpathsize, "%s", GetExecname());
671 p = strrchr(jvmpath, '/');
672 if (p) {
673 /* replace executable name with libjvm.so */
674 snprintf(p + 1, jvmpathsize - (p + 1 - jvmpath), "%s", JVM_DLL);
675 } else {
676 /* this case shouldn't happen */
677 snprintf(jvmpath, jvmpathsize, "%s", JVM_DLL);
678 }
679 #endif /* ifndef GAMMA */
681 if (_launcher_debug)
682 printf("Does `%s' exist ... ", jvmpath);
684 if (stat(jvmpath, &s) == 0) {
685 if (_launcher_debug)
686 printf("yes.\n");
687 return JNI_TRUE;
688 } else {
689 if (_launcher_debug)
690 printf("no.\n");
691 return JNI_FALSE;
692 }
693 }
695 /*
696 * Find path to JRE based on .exe's location or registry settings.
697 */
698 static jboolean
699 GetJREPath(char *path, jint pathsize, char * arch, jboolean speculative)
700 {
701 char libjava[MAXPATHLEN];
703 if (GetApplicationHome(path, pathsize)) {
705 /* Is the JRE universal, i.e. no arch dir? */
706 sprintf(libjava, "%s/jre/lib/" JAVA_DLL, path);
707 if (access(libjava, F_OK) == 0) {
708 strcat(path, "/jre");
709 goto found;
710 }
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 }
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 }
726 if (!speculative)
727 fprintf(stderr, "Error: could not find " JAVA_DLL "\n");
728 return JNI_FALSE;
730 found:
731 if (_launcher_debug)
732 printf("JRE path is %s\n", path);
733 return JNI_TRUE;
734 }
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;
748 if (_launcher_debug) {
749 printf("JVM path is %s\n", jvmpath);
750 }
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;
760 fp = fopen(jvmpath, "r");
761 if(fp == NULL)
762 goto error;
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;
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;
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 }
801 ifn->CreateJavaVM = (CreateJavaVM_t)
802 dlsym(libjvm, "JNI_CreateJavaVM");
803 if (ifn->CreateJavaVM == NULL)
804 goto error;
806 ifn->GetDefaultJavaVMInitArgs = (GetDefaultJavaVMInitArgs_t)
807 dlsym(libjvm, "JNI_GetDefaultJavaVMInitArgs");
808 if (ifn->GetDefaultJavaVMInitArgs == NULL)
809 goto error;
811 return JNI_TRUE;
813 error:
814 fprintf(stderr, "Error: failed %s, because %s\n", jvmpath, dlerror());
815 return JNI_FALSE;
816 #endif /* ifndef GAMMA */
817 }
819 /*
820 * If app is "/foo/bin/javac", or "/foo/bin/sparcv9/javac" then put
821 * "/foo" into buf.
822 */
823 jboolean
824 GetApplicationHome(char *buf, jint bufsize)
825 {
826 #if defined(__linux__) || defined(_ALLBSD_SOURCE)
827 char *execname = GetExecname();
828 if (execname) {
829 strncpy(buf, execname, bufsize-1);
830 buf[bufsize-1] = '\0';
831 } else {
832 return JNI_FALSE;
833 }
834 #else
835 Dl_info dlinfo;
837 dladdr((void *)GetApplicationHome, &dlinfo);
838 if (realpath(dlinfo.dli_fname, buf) == NULL) {
839 fprintf(stderr, "Error: realpath(`%s') failed.\n", dlinfo.dli_fname);
840 return JNI_FALSE;
841 }
842 #endif
844 #ifdef GAMMA
845 {
846 /* gamma launcher uses JAVA_HOME environment variable to find JDK/JRE */
847 char* java_home_var = getenv("JAVA_HOME");
848 if (java_home_var == NULL) {
849 printf("JAVA_HOME must point to a valid JDK/JRE to run gamma\n");
850 return JNI_FALSE;
851 }
852 snprintf(buf, bufsize, "%s", java_home_var);
853 }
854 #else
855 if (strrchr(buf, '/') == 0) {
856 buf[0] = '\0';
857 return JNI_FALSE;
858 }
859 *(strrchr(buf, '/')) = '\0'; /* executable file */
860 if (strlen(buf) < 4 || strrchr(buf, '/') == 0) {
861 buf[0] = '\0';
862 return JNI_FALSE;
863 }
864 if (strcmp("/bin", buf + strlen(buf) - 4) != 0)
865 *(strrchr(buf, '/')) = '\0'; /* sparcv9 or amd64 */
866 if (strlen(buf) < 4 || strcmp("/bin", buf + strlen(buf) - 4) != 0) {
867 buf[0] = '\0';
868 return JNI_FALSE;
869 }
870 *(strrchr(buf, '/')) = '\0'; /* bin */
871 #endif /* ifndef GAMMA */
873 return JNI_TRUE;
874 }
877 /*
878 * Return true if the named program exists
879 */
880 static int
881 ProgramExists(char *name)
882 {
883 struct stat sb;
884 if (stat(name, &sb) != 0) return 0;
885 if (S_ISDIR(sb.st_mode)) return 0;
886 return (sb.st_mode & S_IEXEC) != 0;
887 }
890 /*
891 * Find a command in a directory, returning the path.
892 */
893 static char *
894 Resolve(char *indir, char *cmd)
895 {
896 char name[PATH_MAX + 2], *real;
898 if ((strlen(indir) + strlen(cmd) + 1) > PATH_MAX) return 0;
899 sprintf(name, "%s%c%s", indir, FILE_SEPARATOR, cmd);
900 if (!ProgramExists(name)) return 0;
901 real = JLI_MemAlloc(PATH_MAX + 2);
902 if (!realpath(name, real))
903 strcpy(real, name);
904 return real;
905 }
908 /*
909 * Find a path for the executable
910 */
911 static char *
912 FindExecName(char *program)
913 {
914 char cwdbuf[PATH_MAX+2];
915 char *path;
916 char *tmp_path;
917 char *f;
918 char *result = NULL;
920 /* absolute path? */
921 if (*program == FILE_SEPARATOR ||
922 (FILE_SEPARATOR=='\\' && strrchr(program, ':')))
923 return Resolve("", program+1);
925 /* relative path? */
926 if (strrchr(program, FILE_SEPARATOR) != 0) {
927 char buf[PATH_MAX+2];
928 return Resolve(getcwd(cwdbuf, sizeof(cwdbuf)), program);
929 }
931 /* from search path? */
932 path = getenv("PATH");
933 if (!path || !*path) path = ".";
934 tmp_path = JLI_MemAlloc(strlen(path) + 2);
935 strcpy(tmp_path, path);
937 for (f=tmp_path; *f && result==0; ) {
938 char *s = f;
939 while (*f && (*f != PATH_SEPARATOR)) ++f;
940 if (*f) *f++ = 0;
941 if (*s == FILE_SEPARATOR)
942 result = Resolve(s, program);
943 else {
944 /* relative path element */
945 char dir[2*PATH_MAX];
946 sprintf(dir, "%s%c%s", getcwd(cwdbuf, sizeof(cwdbuf)),
947 FILE_SEPARATOR, s);
948 result = Resolve(dir, program);
949 }
950 if (result != 0) break;
951 }
953 JLI_MemFree(tmp_path);
954 return result;
955 }
958 /* Store the name of the executable once computed */
959 static char *execname = NULL;
961 /*
962 * Compute the name of the executable
963 *
964 * In order to re-exec securely we need the absolute path of the
965 * executable. On Solaris getexecname(3c) may not return an absolute
966 * path so we use dladdr to get the filename of the executable and
967 * then use realpath to derive an absolute path. From Solaris 9
968 * onwards the filename returned in DL_info structure from dladdr is
969 * an absolute pathname so technically realpath isn't required.
970 * On Linux we read the executable name from /proc/self/exe.
971 * As a fallback, and for platforms other than Solaris and Linux,
972 * we use FindExecName to compute the executable name.
973 */
974 static char *
975 SetExecname(char **argv)
976 {
977 char* exec_path = NULL;
979 if (execname != NULL) /* Already determined */
980 return (execname);
982 #if defined(__sun)
983 {
984 Dl_info dlinfo;
985 if (dladdr((void*)&SetExecname, &dlinfo)) {
986 char *resolved = (char*)JLI_MemAlloc(PATH_MAX+1);
987 if (resolved != NULL) {
988 exec_path = realpath(dlinfo.dli_fname, resolved);
989 if (exec_path == NULL) {
990 JLI_MemFree(resolved);
991 }
992 }
993 }
994 }
995 #elif defined(__linux__)
996 {
997 const char* self = "/proc/self/exe";
998 char buf[PATH_MAX+1];
999 int len = readlink(self, buf, PATH_MAX);
1000 if (len >= 0) {
1001 buf[len] = '\0'; /* readlink doesn't nul terminate */
1002 exec_path = JLI_StringDup(buf);
1003 }
1004 }
1005 #else /* !__sun && !__linux */
1006 {
1007 /* Not implemented */
1008 }
1009 #endif
1011 if (exec_path == NULL) {
1012 exec_path = FindExecName(argv[0]);
1013 }
1014 execname = exec_path;
1015 return exec_path;
1016 }
1018 /*
1019 * Return the name of the executable. Used in java_md.c to find the JRE area.
1020 */
1021 static char *
1022 GetExecname() {
1023 return execname;
1024 }
1026 void ReportErrorMessage(char * message, jboolean always) {
1027 if (always) {
1028 fprintf(stderr, "%s\n", message);
1029 }
1030 }
1032 void ReportErrorMessage2(char * format, char * string, jboolean always) {
1033 if (always) {
1034 fprintf(stderr, format, string);
1035 fprintf(stderr, "\n");
1036 }
1037 }
1039 void ReportExceptionDescription(JNIEnv * env) {
1040 (*env)->ExceptionDescribe(env);
1041 }
1043 /*
1044 * Return JNI_TRUE for an option string that has no effect but should
1045 * _not_ be passed on to the vm; return JNI_FALSE otherwise. On
1046 * Solaris SPARC, this screening needs to be done if:
1047 * 1) LD_LIBRARY_PATH does _not_ need to be reset and
1048 * 2) -d32 or -d64 is passed to a binary with a matching data model
1049 * (the exec in SetLibraryPath removes -d<n> options and points the
1050 * exec to the proper binary). When this exec is not done, these options
1051 * would end up getting passed onto the vm.
1052 */
1053 jboolean RemovableMachineDependentOption(char * option) {
1054 /*
1055 * Unconditionally remove both -d32 and -d64 options since only
1056 * the last such options has an effect; e.g.
1057 * java -d32 -d64 -d32 -version
1058 * is equivalent to
1059 * java -d32 -version
1060 */
1062 if( (strcmp(option, "-d32") == 0 ) ||
1063 (strcmp(option, "-d64") == 0 ))
1064 return JNI_TRUE;
1065 else
1066 return JNI_FALSE;
1067 }
1069 void PrintMachineDependentOptions() {
1070 fprintf(stdout,
1071 " -d32 use a 32-bit data model if available\n"
1072 "\n"
1073 " -d64 use a 64-bit data model if available\n");
1074 return;
1075 }
1077 #ifndef GAMMA
1078 /*
1079 * The following methods (down to ServerClassMachine()) answer
1080 * the question about whether a machine is a "server-class"
1081 * machine. A server-class machine is loosely defined as one
1082 * with 2 or more processors and 2 gigabytes or more physical
1083 * memory. The definition of a processor is a physical package,
1084 * not a hyperthreaded chip masquerading as a multi-processor.
1085 * The definition of memory is also somewhat fuzzy, since x86
1086 * machines seem not to report all the memory in their DIMMs, we
1087 * think because of memory mapping of graphics cards, etc.
1088 *
1089 * This code is somewhat more confused with #ifdef's than we'd
1090 * like because this file is used by both Solaris and Linux
1091 * platforms, and so needs to be parameterized for SPARC and
1092 * i586 hardware. The other Linux platforms (amd64 and ia64)
1093 * don't even ask this question, because they only come with
1094 * server JVMs. */
1096 # define KB (1024UL)
1097 # define MB (1024UL * KB)
1098 # define GB (1024UL * MB)
1100 /* Compute physical memory by asking the OS */
1101 uint64_t
1102 physical_memory(void) {
1103 const uint64_t pages = (uint64_t) sysconf(_SC_PHYS_PAGES);
1104 const uint64_t page_size = (uint64_t) sysconf(_SC_PAGESIZE);
1105 const uint64_t result = pages * page_size;
1106 # define UINT64_FORMAT "%" PRIu64
1108 if (_launcher_debug) {
1109 printf("pages: " UINT64_FORMAT
1110 " page_size: " UINT64_FORMAT
1111 " physical memory: " UINT64_FORMAT " (%.3fGB)\n",
1112 pages, page_size, result, result / (double) GB);
1113 }
1114 return result;
1115 }
1117 #if defined(__sun) && defined(__sparc)
1119 /* Methods for solaris-sparc: these are easy. */
1121 /* Ask the OS how many processors there are. */
1122 unsigned long
1123 physical_processors(void) {
1124 const unsigned long sys_processors = sysconf(_SC_NPROCESSORS_CONF);
1126 if (_launcher_debug) {
1127 printf("sysconf(_SC_NPROCESSORS_CONF): %lu\n", sys_processors);
1128 }
1129 return sys_processors;
1130 }
1132 /* The solaris-sparc version of the "server-class" predicate. */
1133 jboolean
1134 solaris_sparc_ServerClassMachine(void) {
1135 jboolean result = JNI_FALSE;
1136 /* How big is a server class machine? */
1137 const unsigned long server_processors = 2UL;
1138 const uint64_t server_memory = 2UL * GB;
1139 const uint64_t actual_memory = physical_memory();
1141 /* Is this a server class machine? */
1142 if (actual_memory >= server_memory) {
1143 const unsigned long actual_processors = physical_processors();
1144 if (actual_processors >= server_processors) {
1145 result = JNI_TRUE;
1146 }
1147 }
1148 if (_launcher_debug) {
1149 printf("solaris_" LIBARCHNAME "_ServerClassMachine: %s\n",
1150 (result == JNI_TRUE ? "JNI_TRUE" : "JNI_FALSE"));
1151 }
1152 return result;
1153 }
1155 #endif /* __sun && __sparc */
1157 #if defined(__sun) && defined(i586)
1159 /*
1160 * A utility method for asking the CPU about itself.
1161 * There's a corresponding version of linux-i586
1162 * because the compilers are different.
1163 */
1164 void
1165 get_cpuid(uint32_t arg,
1166 uint32_t* eaxp,
1167 uint32_t* ebxp,
1168 uint32_t* ecxp,
1169 uint32_t* edxp) {
1170 #ifdef _LP64
1171 asm(
1172 /* rbx is a callee-saved register */
1173 " movq %rbx, %r11 \n"
1174 /* rdx and rcx are 3rd and 4th argument registers */
1175 " movq %rdx, %r10 \n"
1176 " movq %rcx, %r9 \n"
1177 " movl %edi, %eax \n"
1178 " cpuid \n"
1179 " movl %eax, (%rsi)\n"
1180 " movl %ebx, (%r10)\n"
1181 " movl %ecx, (%r9) \n"
1182 " movl %edx, (%r8) \n"
1183 /* Restore rbx */
1184 " movq %r11, %rbx");
1185 #else
1186 /* EBX is a callee-saved register */
1187 asm(" pushl %ebx");
1188 /* Need ESI for storing through arguments */
1189 asm(" pushl %esi");
1190 asm(" movl 8(%ebp), %eax \n"
1191 " cpuid \n"
1192 " movl 12(%ebp), %esi \n"
1193 " movl %eax, (%esi) \n"
1194 " movl 16(%ebp), %esi \n"
1195 " movl %ebx, (%esi) \n"
1196 " movl 20(%ebp), %esi \n"
1197 " movl %ecx, (%esi) \n"
1198 " movl 24(%ebp), %esi \n"
1199 " movl %edx, (%esi) ");
1200 /* Restore ESI and EBX */
1201 asm(" popl %esi");
1202 /* Restore EBX */
1203 asm(" popl %ebx");
1204 #endif
1205 }
1207 #endif /* __sun && i586 */
1209 #if (defined(__linux__) || defined(_ALLBSD_SOURCE)) && defined(i586)
1211 /*
1212 * A utility method for asking the CPU about itself.
1213 * There's a corresponding version of solaris-i586
1214 * because the compilers are different.
1215 */
1216 void
1217 get_cpuid(uint32_t arg,
1218 uint32_t* eaxp,
1219 uint32_t* ebxp,
1220 uint32_t* ecxp,
1221 uint32_t* edxp) {
1222 #ifdef _LP64
1223 __asm__ volatile (/* Instructions */
1224 " movl %4, %%eax \n"
1225 " cpuid \n"
1226 " movl %%eax, (%0)\n"
1227 " movl %%ebx, (%1)\n"
1228 " movl %%ecx, (%2)\n"
1229 " movl %%edx, (%3)\n"
1230 : /* Outputs */
1231 : /* Inputs */
1232 "r" (eaxp),
1233 "r" (ebxp),
1234 "r" (ecxp),
1235 "r" (edxp),
1236 "r" (arg)
1237 : /* Clobbers */
1238 "%rax", "%rbx", "%rcx", "%rdx", "memory"
1239 );
1240 #else
1241 uint32_t value_of_eax = 0;
1242 uint32_t value_of_ebx = 0;
1243 uint32_t value_of_ecx = 0;
1244 uint32_t value_of_edx = 0;
1245 __asm__ volatile (/* Instructions */
1246 /* ebx is callee-save, so push it */
1247 " pushl %%ebx \n"
1248 " movl %4, %%eax \n"
1249 " cpuid \n"
1250 " movl %%eax, %0 \n"
1251 " movl %%ebx, %1 \n"
1252 " movl %%ecx, %2 \n"
1253 " movl %%edx, %3 \n"
1254 /* restore ebx */
1255 " popl %%ebx \n"
1257 : /* Outputs */
1258 "=m" (value_of_eax),
1259 "=m" (value_of_ebx),
1260 "=m" (value_of_ecx),
1261 "=m" (value_of_edx)
1262 : /* Inputs */
1263 "m" (arg)
1264 : /* Clobbers */
1265 "%eax", "%ecx", "%edx"
1266 );
1267 *eaxp = value_of_eax;
1268 *ebxp = value_of_ebx;
1269 *ecxp = value_of_ecx;
1270 *edxp = value_of_edx;
1271 #endif
1272 }
1274 #endif /* __linux__ && i586 */
1276 #ifdef i586
1277 /*
1278 * Routines shared by solaris-i586 and linux-i586.
1279 */
1281 enum HyperThreadingSupport_enum {
1282 hts_supported = 1,
1283 hts_too_soon_to_tell = 0,
1284 hts_not_supported = -1,
1285 hts_not_pentium4 = -2,
1286 hts_not_intel = -3
1287 };
1288 typedef enum HyperThreadingSupport_enum HyperThreadingSupport;
1290 /* Determine if hyperthreading is supported */
1291 HyperThreadingSupport
1292 hyperthreading_support(void) {
1293 HyperThreadingSupport result = hts_too_soon_to_tell;
1294 /* Bits 11 through 8 is family processor id */
1295 # define FAMILY_ID_SHIFT 8
1296 # define FAMILY_ID_MASK 0xf
1297 /* Bits 23 through 20 is extended family processor id */
1298 # define EXT_FAMILY_ID_SHIFT 20
1299 # define EXT_FAMILY_ID_MASK 0xf
1300 /* Pentium 4 family processor id */
1301 # define PENTIUM4_FAMILY_ID 0xf
1302 /* Bit 28 indicates Hyper-Threading Technology support */
1303 # define HT_BIT_SHIFT 28
1304 # define HT_BIT_MASK 1
1305 uint32_t vendor_id[3] = { 0U, 0U, 0U };
1306 uint32_t value_of_eax = 0U;
1307 uint32_t value_of_edx = 0U;
1308 uint32_t dummy = 0U;
1310 /* Yes, this is supposed to be [0], [2], [1] */
1311 get_cpuid(0, &dummy, &vendor_id[0], &vendor_id[2], &vendor_id[1]);
1312 if (_launcher_debug) {
1313 printf("vendor: %c %c %c %c %c %c %c %c %c %c %c %c \n",
1314 ((vendor_id[0] >> 0) & 0xff),
1315 ((vendor_id[0] >> 8) & 0xff),
1316 ((vendor_id[0] >> 16) & 0xff),
1317 ((vendor_id[0] >> 24) & 0xff),
1318 ((vendor_id[1] >> 0) & 0xff),
1319 ((vendor_id[1] >> 8) & 0xff),
1320 ((vendor_id[1] >> 16) & 0xff),
1321 ((vendor_id[1] >> 24) & 0xff),
1322 ((vendor_id[2] >> 0) & 0xff),
1323 ((vendor_id[2] >> 8) & 0xff),
1324 ((vendor_id[2] >> 16) & 0xff),
1325 ((vendor_id[2] >> 24) & 0xff));
1326 }
1327 get_cpuid(1, &value_of_eax, &dummy, &dummy, &value_of_edx);
1328 if (_launcher_debug) {
1329 printf("value_of_eax: 0x%x value_of_edx: 0x%x\n",
1330 value_of_eax, value_of_edx);
1331 }
1332 if ((((value_of_eax >> FAMILY_ID_SHIFT) & FAMILY_ID_MASK) == PENTIUM4_FAMILY_ID) ||
1333 (((value_of_eax >> EXT_FAMILY_ID_SHIFT) & EXT_FAMILY_ID_MASK) != 0)) {
1334 if ((((vendor_id[0] >> 0) & 0xff) == 'G') &&
1335 (((vendor_id[0] >> 8) & 0xff) == 'e') &&
1336 (((vendor_id[0] >> 16) & 0xff) == 'n') &&
1337 (((vendor_id[0] >> 24) & 0xff) == 'u') &&
1338 (((vendor_id[1] >> 0) & 0xff) == 'i') &&
1339 (((vendor_id[1] >> 8) & 0xff) == 'n') &&
1340 (((vendor_id[1] >> 16) & 0xff) == 'e') &&
1341 (((vendor_id[1] >> 24) & 0xff) == 'I') &&
1342 (((vendor_id[2] >> 0) & 0xff) == 'n') &&
1343 (((vendor_id[2] >> 8) & 0xff) == 't') &&
1344 (((vendor_id[2] >> 16) & 0xff) == 'e') &&
1345 (((vendor_id[2] >> 24) & 0xff) == 'l')) {
1346 if (((value_of_edx >> HT_BIT_SHIFT) & HT_BIT_MASK) == HT_BIT_MASK) {
1347 if (_launcher_debug) {
1348 printf("Hyperthreading supported\n");
1349 }
1350 result = hts_supported;
1351 } else {
1352 if (_launcher_debug) {
1353 printf("Hyperthreading not supported\n");
1354 }
1355 result = hts_not_supported;
1356 }
1357 } else {
1358 if (_launcher_debug) {
1359 printf("Not GenuineIntel\n");
1360 }
1361 result = hts_not_intel;
1362 }
1363 } else {
1364 if (_launcher_debug) {
1365 printf("not Pentium 4 or extended\n");
1366 }
1367 result = hts_not_pentium4;
1368 }
1369 return result;
1370 }
1372 /* Determine how many logical processors there are per CPU */
1373 unsigned int
1374 logical_processors_per_package(void) {
1375 /*
1376 * After CPUID with EAX==1, register EBX bits 23 through 16
1377 * indicate the number of logical processors per package
1378 */
1379 # define NUM_LOGICAL_SHIFT 16
1380 # define NUM_LOGICAL_MASK 0xff
1381 unsigned int result = 1U;
1382 const HyperThreadingSupport hyperthreading = hyperthreading_support();
1384 if (hyperthreading == hts_supported) {
1385 uint32_t value_of_ebx = 0U;
1386 uint32_t dummy = 0U;
1388 get_cpuid(1, &dummy, &value_of_ebx, &dummy, &dummy);
1389 result = (value_of_ebx >> NUM_LOGICAL_SHIFT) & NUM_LOGICAL_MASK;
1390 if (_launcher_debug) {
1391 printf("logical processors per package: %u\n", result);
1392 }
1393 }
1394 return result;
1395 }
1397 /* Compute the number of physical processors, not logical processors */
1398 unsigned long
1399 physical_processors(void) {
1400 const long sys_processors = sysconf(_SC_NPROCESSORS_CONF);
1401 unsigned long result = sys_processors;
1403 if (_launcher_debug) {
1404 printf("sysconf(_SC_NPROCESSORS_CONF): %lu\n", sys_processors);
1405 }
1406 if (sys_processors > 1) {
1407 unsigned int logical_processors = logical_processors_per_package();
1408 if (logical_processors > 1) {
1409 result = (unsigned long) sys_processors / logical_processors;
1410 }
1411 }
1412 if (_launcher_debug) {
1413 printf("physical processors: %lu\n", result);
1414 }
1415 return result;
1416 }
1418 #endif /* i586 */
1420 #if defined(__sun) && defined(i586)
1422 /* The definition of a server-class machine for solaris-i586/amd64 */
1423 jboolean
1424 solaris_i586_ServerClassMachine(void) {
1425 jboolean result = JNI_FALSE;
1426 /* How big is a server class machine? */
1427 const unsigned long server_processors = 2UL;
1428 const uint64_t server_memory = 2UL * GB;
1429 /*
1430 * We seem not to get our full complement of memory.
1431 * We allow some part (1/8?) of the memory to be "missing",
1432 * based on the sizes of DIMMs, and maybe graphics cards.
1433 */
1434 const uint64_t missing_memory = 256UL * MB;
1435 const uint64_t actual_memory = physical_memory();
1437 /* Is this a server class machine? */
1438 if (actual_memory >= (server_memory - missing_memory)) {
1439 const unsigned long actual_processors = physical_processors();
1440 if (actual_processors >= server_processors) {
1441 result = JNI_TRUE;
1442 }
1443 }
1444 if (_launcher_debug) {
1445 printf("solaris_" LIBARCHNAME "_ServerClassMachine: %s\n",
1446 (result == JNI_TRUE ? "true" : "false"));
1447 }
1448 return result;
1449 }
1451 #endif /* __sun && i586 */
1453 #if defined(__linux__) && defined(i586)
1455 /* The definition of a server-class machine for linux-i586 */
1456 jboolean
1457 linux_i586_ServerClassMachine(void) {
1458 jboolean result = JNI_FALSE;
1459 /* How big is a server class machine? */
1460 const unsigned long server_processors = 2UL;
1461 const uint64_t server_memory = 2UL * GB;
1462 /*
1463 * We seem not to get our full complement of memory.
1464 * We allow some part (1/8?) of the memory to be "missing",
1465 * based on the sizes of DIMMs, and maybe graphics cards.
1466 */
1467 const uint64_t missing_memory = 256UL * MB;
1468 const uint64_t actual_memory = physical_memory();
1470 /* Is this a server class machine? */
1471 if (actual_memory >= (server_memory - missing_memory)) {
1472 const unsigned long actual_processors = physical_processors();
1473 if (actual_processors >= server_processors) {
1474 result = JNI_TRUE;
1475 }
1476 }
1477 if (_launcher_debug) {
1478 printf("linux_" LIBARCHNAME "_ServerClassMachine: %s\n",
1479 (result == JNI_TRUE ? "true" : "false"));
1480 }
1481 return result;
1482 }
1484 #endif /* __linux__ && i586 */
1486 #if defined(_ALLBSD_SOURCE) && defined(i586)
1488 /* The definition of a server-class machine for bsd-i586 */
1489 jboolean
1490 bsd_i586_ServerClassMachine(void) {
1491 jboolean result = JNI_FALSE;
1492 /* How big is a server class machine? */
1493 const unsigned long server_processors = 2UL;
1494 const uint64_t server_memory = 2UL * GB;
1495 /*
1496 * We seem not to get our full complement of memory.
1497 * We allow some part (1/8?) of the memory to be "missing",
1498 * based on the sizes of DIMMs, and maybe graphics cards.
1499 */
1500 const uint64_t missing_memory = 256UL * MB;
1501 const uint64_t actual_memory = physical_memory();
1503 /* Is this a server class machine? */
1504 if (actual_memory >= (server_memory - missing_memory)) {
1505 const unsigned long actual_processors = physical_processors();
1506 if (actual_processors >= server_processors) {
1507 result = JNI_TRUE;
1508 }
1509 }
1510 if (_launcher_debug) {
1511 printf("linux_" LIBARCHNAME "_ServerClassMachine: %s\n",
1512 (result == JNI_TRUE ? "true" : "false"));
1513 }
1514 return result;
1515 }
1517 #endif /* _ALLBSD_SOURCE && i586 */
1519 /* Dispatch to the platform-specific definition of "server-class" */
1520 jboolean
1521 ServerClassMachine(void) {
1522 jboolean result = JNI_FALSE;
1523 #if defined(NEVER_ACT_AS_SERVER_CLASS_MACHINE)
1524 result = JNI_FALSE;
1525 #elif defined(ALWAYS_ACT_AS_SERVER_CLASS_MACHINE)
1526 result = JNI_TRUE;
1527 #elif defined(__sun) && defined(__sparc)
1528 result = solaris_sparc_ServerClassMachine();
1529 #elif defined(__sun) && defined(i586)
1530 result = solaris_i586_ServerClassMachine();
1531 #elif defined(__linux__) && defined(i586)
1532 result = linux_i586_ServerClassMachine();
1533 #elif defined(_ALLBSD_SOURCE) && defined(i586)
1534 result = bsd_i586_ServerClassMachine();
1535 #else
1536 if (_launcher_debug) {
1537 printf("ServerClassMachine: returns default value of %s\n",
1538 (result == JNI_TRUE ? "true" : "false"));
1539 }
1540 #endif
1541 return result;
1542 }
1544 /*
1545 * Since using the file system as a registry is a bit risky, perform
1546 * additional sanity checks on the identified directory to validate
1547 * it as a valid jre/sdk.
1548 *
1549 * Return 0 if the tests fail; otherwise return non-zero (true).
1550 *
1551 * Note that checking for anything more than the existence of an
1552 * executable object at bin/java relative to the path being checked
1553 * will break the regression tests.
1554 */
1555 static int
1556 CheckSanity(char *path, char *dir)
1557 {
1558 char buffer[PATH_MAX];
1560 if (strlen(path) + strlen(dir) + 11 > PATH_MAX)
1561 return (0); /* Silently reject "impossibly" long paths */
1563 (void)strcat(strcat(strcat(strcpy(buffer, path), "/"), dir), "/bin/java");
1564 return ((access(buffer, X_OK) == 0) ? 1 : 0);
1565 }
1567 /*
1568 * Determine if there is an acceptable JRE in the directory dirname.
1569 * Upon locating the "best" one, return a fully qualified path to
1570 * it. "Best" is defined as the most advanced JRE meeting the
1571 * constraints contained in the manifest_info. If no JRE in this
1572 * directory meets the constraints, return NULL.
1573 *
1574 * Note that we don't check for errors in reading the directory
1575 * (which would be done by checking errno). This is because it
1576 * doesn't matter if we get an error reading the directory, or
1577 * we just don't find anything interesting in the directory. We
1578 * just return NULL in either case.
1579 *
1580 * The historical names of j2sdk and j2re were changed to jdk and
1581 * jre respecively as part of the 1.5 rebranding effort. Since the
1582 * former names are legacy on Linux, they must be recognized for
1583 * all time. Fortunately, this is a minor cost.
1584 */
1585 static char
1586 *ProcessDir(manifest_info *info, char *dirname)
1587 {
1588 DIR *dirp;
1589 struct dirent *dp;
1590 char *best = NULL;
1591 int offset;
1592 int best_offset = 0;
1593 char *ret_str = NULL;
1594 char buffer[PATH_MAX];
1596 if ((dirp = opendir(dirname)) == NULL)
1597 return (NULL);
1599 do {
1600 if ((dp = readdir(dirp)) != NULL) {
1601 offset = 0;
1602 if ((strncmp(dp->d_name, "jre", 3) == 0) ||
1603 (strncmp(dp->d_name, "jdk", 3) == 0))
1604 offset = 3;
1605 else if (strncmp(dp->d_name, "j2re", 4) == 0)
1606 offset = 4;
1607 else if (strncmp(dp->d_name, "j2sdk", 5) == 0)
1608 offset = 5;
1609 if (offset > 0) {
1610 if ((JLI_AcceptableRelease(dp->d_name + offset,
1611 info->jre_version)) && CheckSanity(dirname, dp->d_name))
1612 if ((best == NULL) || (JLI_ExactVersionId(
1613 dp->d_name + offset, best + best_offset) > 0)) {
1614 if (best != NULL)
1615 JLI_MemFree(best);
1616 best = JLI_StringDup(dp->d_name);
1617 best_offset = offset;
1618 }
1619 }
1620 }
1621 } while (dp != NULL);
1622 (void) closedir(dirp);
1623 if (best == NULL)
1624 return (NULL);
1625 else {
1626 ret_str = JLI_MemAlloc(strlen(dirname) + strlen(best) + 2);
1627 ret_str = strcat(strcat(strcpy(ret_str, dirname), "/"), best);
1628 JLI_MemFree(best);
1629 return (ret_str);
1630 }
1631 }
1633 /*
1634 * This is the global entry point. It examines the host for the optimal
1635 * JRE to be used by scanning a set of directories. The set of directories
1636 * is platform dependent and can be overridden by the environment
1637 * variable JAVA_VERSION_PATH.
1638 *
1639 * This routine itself simply determines the set of appropriate
1640 * directories before passing control onto ProcessDir().
1641 */
1642 char*
1643 LocateJRE(manifest_info* info)
1644 {
1645 char *path;
1646 char *home;
1647 char *target = NULL;
1648 char *dp;
1649 char *cp;
1651 /*
1652 * Start by getting JAVA_VERSION_PATH
1653 */
1654 if (info->jre_restrict_search)
1655 path = JLI_StringDup(system_dir);
1656 else if ((path = getenv("JAVA_VERSION_PATH")) != NULL)
1657 path = JLI_StringDup(path);
1658 else
1659 if ((home = getenv("HOME")) != NULL) {
1660 path = (char *)JLI_MemAlloc(strlen(home) + strlen(system_dir) +
1661 strlen(user_dir) + 2);
1662 path = strcat(strcat(strcat(strcpy(path, home),
1663 user_dir), ":"), system_dir);
1664 } else
1665 path = JLI_StringDup(system_dir);
1667 /*
1668 * Step through each directory on the path. Terminate the scan with
1669 * the first directory with an acceptable JRE.
1670 */
1671 cp = dp = path;
1672 while (dp != NULL) {
1673 cp = strchr(dp, (int)':');
1674 if (cp != NULL)
1675 *cp = (char)NULL;
1676 if ((target = ProcessDir(info, dp)) != NULL)
1677 break;
1678 dp = cp;
1679 if (dp != NULL)
1680 dp++;
1681 }
1682 JLI_MemFree(path);
1683 return (target);
1684 }
1686 /*
1687 * Given a path to a jre to execute, this routine checks if this process
1688 * is indeed that jre. If not, it exec's that jre.
1689 *
1690 * We want to actually check the paths rather than just the version string
1691 * built into the executable, so that given version specification (and
1692 * JAVA_VERSION_PATH) will yield the exact same Java environment, regardless
1693 * of the version of the arbitrary launcher we start with.
1694 */
1695 void
1696 ExecJRE(char *jre, char **argv)
1697 {
1698 char wanted[PATH_MAX];
1699 char *execname;
1700 char *progname;
1702 /*
1703 * Resolve the real path to the directory containing the selected JRE.
1704 */
1705 if (realpath(jre, wanted) == NULL) {
1706 fprintf(stderr, "Unable to resolve %s\n", jre);
1707 exit(1);
1708 }
1710 /*
1711 * Resolve the real path to the currently running launcher.
1712 */
1713 execname = SetExecname(argv);
1714 if (execname == NULL) {
1715 fprintf(stderr, "Unable to resolve current executable\n");
1716 exit(1);
1717 }
1719 /*
1720 * If the path to the selected JRE directory is a match to the initial
1721 * portion of the path to the currently executing JRE, we have a winner!
1722 * If so, just return.
1723 */
1724 if (strncmp(wanted, execname, strlen(wanted)) == 0)
1725 return; /* I am the droid you were looking for */
1727 /*
1728 * If this isn't the selected version, exec the selected version.
1729 */
1730 #ifdef JAVA_ARGS /* javac, jar and friends. */
1731 progname = "java";
1732 #else /* java, oldjava, javaw and friends */
1733 #ifdef PROGNAME
1734 progname = PROGNAME;
1735 #else
1736 progname = *argv;
1737 if ((s = strrchr(progname, FILE_SEPARATOR)) != 0) {
1738 progname = s + 1;
1739 }
1740 #endif /* PROGNAME */
1741 #endif /* JAVA_ARGS */
1743 /*
1744 * This should never happen (because of the selection code in SelectJRE),
1745 * but check for "impossibly" long path names just because buffer overruns
1746 * can be so deadly.
1747 */
1748 if (strlen(wanted) + strlen(progname) + 6 > PATH_MAX) {
1749 fprintf(stderr, "Path length exceeds maximum length (PATH_MAX)\n");
1750 exit(1);
1751 }
1753 /*
1754 * Construct the path and exec it.
1755 */
1756 (void)strcat(strcat(wanted, "/bin/"), progname);
1757 argv[0] = progname;
1758 if (_launcher_debug) {
1759 int i;
1760 printf("ReExec Command: %s (%s)\n", wanted, argv[0]);
1761 printf("ReExec Args:");
1762 for (i = 1; argv[i] != NULL; i++)
1763 printf(" %s", argv[i]);
1764 printf("\n");
1765 }
1766 (void)fflush(stdout);
1767 (void)fflush(stderr);
1768 execv(wanted, argv);
1769 perror("execv()");
1770 fprintf(stderr, "Exec of %s failed\n", wanted);
1771 exit(1);
1772 }
1773 #endif /* ifndef GAMMA */
1775 /*
1776 * "Borrowed" from Solaris 10 where the unsetenv() function is being added
1777 * to libc thanks to SUSv3 (Standard Unix Specification, version 3). As
1778 * such, in the fullness of time this will appear in libc on all relevant
1779 * Solaris/Linux platforms and maybe even the Windows platform. At that
1780 * time, this stub can be removed.
1781 *
1782 * This implementation removes the environment locking for multithreaded
1783 * applications. (We don't have access to these mutexes within libc and
1784 * the launcher isn't multithreaded.) Note that what remains is platform
1785 * independent, because it only relies on attributes that a POSIX environment
1786 * defines.
1787 *
1788 * Returns 0 on success, -1 on failure.
1789 *
1790 * Also removed was the setting of errno. The only value of errno set
1791 * was EINVAL ("Invalid Argument").
1792 */
1794 /*
1795 * s1(environ) is name=value
1796 * s2(name) is name(not the form of name=value).
1797 * if names match, return value of 1, else return 0
1798 */
1799 static int
1800 match_noeq(const char *s1, const char *s2)
1801 {
1802 while (*s1 == *s2++) {
1803 if (*s1++ == '=')
1804 return (1);
1805 }
1806 if (*s1 == '=' && s2[-1] == '\0')
1807 return (1);
1808 return (0);
1809 }
1811 /*
1812 * added for SUSv3 standard
1813 *
1814 * Delete entry from environ.
1815 * Do not free() memory! Other threads may be using it.
1816 * Keep it around forever.
1817 */
1818 static int
1819 borrowed_unsetenv(const char *name)
1820 {
1821 long idx; /* index into environ */
1823 if (name == NULL || *name == '\0' ||
1824 strchr(name, '=') != NULL) {
1825 return (-1);
1826 }
1828 for (idx = 0; environ[idx] != NULL; idx++) {
1829 if (match_noeq(environ[idx], name))
1830 break;
1831 }
1832 if (environ[idx] == NULL) {
1833 /* name not found but still a success */
1834 return (0);
1835 }
1836 /* squeeze up one entry */
1837 do {
1838 environ[idx] = environ[idx+1];
1839 } while (environ[++idx] != NULL);
1841 return (0);
1842 }
1843 /* --- End of "borrowed" code --- */
1845 /*
1846 * Wrapper for unsetenv() function.
1847 */
1848 int
1849 UnsetEnv(char *name)
1850 {
1851 return(borrowed_unsetenv(name));
1852 }
1854 /* --- Splash Screen shared library support --- */
1856 static const char* SPLASHSCREEN_SO = "libsplashscreen.so";
1858 static void* hSplashLib = NULL;
1860 void* SplashProcAddress(const char* name) {
1861 if (!hSplashLib) {
1862 hSplashLib = dlopen(SPLASHSCREEN_SO, RTLD_LAZY | RTLD_GLOBAL);
1863 }
1864 if (hSplashLib) {
1865 void* sym = dlsym(hSplashLib, name);
1866 return sym;
1867 } else {
1868 return NULL;
1869 }
1870 }
1872 void SplashFreeLibrary() {
1873 if (hSplashLib) {
1874 dlclose(hSplashLib);
1875 hSplashLib = NULL;
1876 }
1877 }
1879 const char *
1880 jlong_format_specifier() {
1881 return "%lld";
1882 }
1884 /*
1885 * Block current thread and continue execution in a new thread
1886 */
1887 int
1888 ContinueInNewThread(int (JNICALL *continuation)(void *), jlong stack_size, void * args) {
1889 int rslt;
1890 #if defined(__linux__) || defined(_ALLBSD_SOURCE)
1891 pthread_t tid;
1892 pthread_attr_t attr;
1893 pthread_attr_init(&attr);
1894 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
1896 if (stack_size > 0) {
1897 pthread_attr_setstacksize(&attr, stack_size);
1898 }
1900 if (pthread_create(&tid, &attr, (void *(*)(void*))continuation, (void*)args) == 0) {
1901 void * tmp;
1902 pthread_join(tid, &tmp);
1903 rslt = (int)(intptr_t)tmp;
1904 } else {
1905 /*
1906 * Continue execution in current thread if for some reason (e.g. out of
1907 * memory/LWP) a new thread can't be created. This will likely fail
1908 * later in continuation as JNI_CreateJavaVM needs to create quite a
1909 * few new threads, anyway, just give it a try..
1910 */
1911 rslt = continuation(args);
1912 }
1914 pthread_attr_destroy(&attr);
1915 #else
1916 thread_t tid;
1917 long flags = 0;
1918 if (thr_create(NULL, stack_size, (void *(*)(void *))continuation, args, flags, &tid) == 0) {
1919 void * tmp;
1920 thr_join(tid, NULL, &tmp);
1921 rslt = (int)(intptr_t)tmp;
1922 } else {
1923 /* See above. Continue in current thread if thr_create() failed */
1924 rslt = continuation(args);
1925 }
1926 #endif
1927 return rslt;
1928 }
1930 /* Coarse estimation of number of digits assuming the worst case is a 64-bit pid. */
1931 #define MAX_PID_STR_SZ 20
1933 void SetJavaLauncherPlatformProps() {
1934 /* Linux only */
1935 #ifdef __linux__
1936 const char *substr = "-Dsun.java.launcher.pid=";
1937 char *pid_prop_str = (char *)JLI_MemAlloc(strlen(substr) + MAX_PID_STR_SZ + 1);
1938 sprintf(pid_prop_str, "%s%d", substr, getpid());
1939 AddOption(pid_prop_str, NULL);
1940 #endif
1941 }
