Mercurial > hg > truffle
annotate src/os/solaris/launcher/java_md.c @ 1953:8d81b4a1d3e1
6998802: ScavengeALot: assert(!gch->incremental_collection_failed()) failed: Twice in a row
Summary: Weaken assert by excluding scavenges resulting from -XX:+ScavengeALot stress-testing option.
Reviewed-by: jmasa, tonyp
author | ysr |
---|---|
date | Thu, 11 Nov 2010 10:42:43 -0800 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
---|---|
0 | 1 /* |
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2 * Copyright (c) 1998, 2008, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 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 # endif | |
83 | |
84 #endif /* _LP64 */ | |
85 | |
86 #ifdef __sun | |
87 # define DUAL_MODE | |
88 # ifdef __sparc | |
89 # define BIG_ARCH "sparcv9" | |
90 # define SMALL_ARCH "sparc" | |
91 # else | |
92 # define BIG_ARCH "amd64" | |
93 # define SMALL_ARCH "i386" | |
94 # endif | |
95 # include <sys/systeminfo.h> | |
96 # include <sys/elf.h> | |
97 # include <stdio.h> | |
98 #else | |
99 # ifndef ARCH | |
100 # include <sys/systeminfo.h> | |
101 # endif | |
102 #endif | |
103 | |
104 #endif /* ifndef GAMMA */ | |
105 | |
106 /* pointer to environment */ | |
107 extern char **environ; | |
108 | |
109 #ifndef GAMMA | |
110 | |
111 /* | |
112 * A collection of useful strings. One should think of these as #define | |
113 * entries, but actual strings can be more efficient (with many compilers). | |
114 */ | |
115 #ifdef __linux__ | |
116 static const char *system_dir = "/usr/java"; | |
117 static const char *user_dir = "/java"; | |
118 #else /* Solaris */ | |
119 static const char *system_dir = "/usr/jdk"; | |
120 static const char *user_dir = "/jdk"; | |
121 #endif | |
122 | |
123 #endif /* ifndef GAMMA */ | |
124 | |
125 /* | |
126 * Flowchart of launcher execs and options processing on unix | |
127 * | |
128 * The selection of the proper vm shared library to open depends on | |
129 * several classes of command line options, including vm "flavor" | |
130 * options (-client, -server) and the data model options, -d32 and | |
131 * -d64, as well as a version specification which may have come from | |
132 * the command line or from the manifest of an executable jar file. | |
133 * The vm selection options are not passed to the running | |
134 * virtual machine; they must be screened out by the launcher. | |
135 * | |
136 * The version specification (if any) is processed first by the | |
137 * platform independent routine SelectVersion. This may result in | |
138 * the exec of the specified launcher version. | |
139 * | |
140 * Typically, the launcher execs at least once to ensure a suitable | |
141 * LD_LIBRARY_PATH is in effect for the process. The first exec | |
142 * screens out all the data model options; leaving the choice of data | |
143 * model implicit in the binary selected to run. However, in case no | |
144 * exec is done, the data model options are screened out before the vm | |
145 * is invoked. | |
146 * | |
147 * incoming argv ------------------------------ | |
148 * | | | |
149 * \|/ | | |
150 * CheckJVMType | | |
151 * (removes -client, -server, etc.) | | |
152 * \|/ | |
153 * CreateExecutionEnvironment | |
154 * (removes -d32 and -d64, | |
155 * determines desired data model, | |
156 * sets up LD_LIBRARY_PATH, | |
157 * and exec's) | |
158 * | | |
159 * -------------------------------------------- | |
160 * | | |
161 * \|/ | |
162 * exec child 1 incoming argv ----------------- | |
163 * | | | |
164 * \|/ | | |
165 * CheckJVMType | | |
166 * (removes -client, -server, etc.) | | |
167 * | \|/ | |
168 * | CreateExecutionEnvironment | |
169 * | (verifies desired data model | |
170 * | is running and acceptable | |
171 * | LD_LIBRARY_PATH; | |
172 * | no-op in child) | |
173 * | | |
174 * \|/ | |
175 * TranslateDashJArgs... | |
176 * (Prepare to pass args to vm) | |
177 * | | |
178 * | | |
179 * | | |
180 * \|/ | |
181 * ParseArguments | |
182 * (ignores -d32 and -d64, | |
183 * processes version options, | |
184 * creates argument list for vm, | |
185 * etc.) | |
186 * | |
187 */ | |
188 | |
189 static char *SetExecname(char **argv); | |
190 static char * GetExecname(); | |
191 static jboolean GetJVMPath(const char *jrepath, const char *jvmtype, | |
192 char *jvmpath, jint jvmpathsize, char * arch); | |
193 static jboolean GetJREPath(char *path, jint pathsize, char * arch, jboolean speculative); | |
194 | |
195 const char * | |
196 GetArch() | |
197 { | |
198 static char *arch = NULL; | |
199 static char buf[12]; | |
200 if (arch) { | |
201 return arch; | |
202 } | |
203 | |
204 #ifdef ARCH | |
205 strcpy(buf, ARCH); | |
206 #else | |
207 sysinfo(SI_ARCHITECTURE, buf, sizeof(buf)); | |
208 #endif | |
209 arch = buf; | |
210 return arch; | |
211 } | |
212 | |
213 void | |
214 CreateExecutionEnvironment(int *_argcp, | |
215 char ***_argvp, | |
216 char jrepath[], | |
217 jint so_jrepath, | |
218 char jvmpath[], | |
219 jint so_jvmpath, | |
220 char **original_argv) { | |
221 /* | |
222 * First, determine if we are running the desired data model. If we | |
223 * are running the desired data model, all the error messages | |
224 * associated with calling GetJREPath, ReadKnownVMs, etc. should be | |
225 * output. However, if we are not running the desired data model, | |
226 * some of the errors should be suppressed since it is more | |
227 * informative to issue an error message based on whether or not the | |
228 * os/processor combination has dual mode capabilities. | |
229 */ | |
230 | |
231 char *execname = NULL; | |
232 int original_argc = *_argcp; | |
233 jboolean jvmpathExists; | |
234 | |
235 /* Compute the name of the executable */ | |
236 execname = SetExecname(*_argvp); | |
237 | |
238 #ifndef GAMMA | |
239 /* Set the LD_LIBRARY_PATH environment variable, check data model | |
240 flags, and exec process, if needed */ | |
241 { | |
242 char *arch = (char *)GetArch(); /* like sparc or sparcv9 */ | |
243 char * jvmtype = NULL; | |
244 int argc = *_argcp; | |
245 char **argv = original_argv; | |
246 | |
247 char *runpath = NULL; /* existing effective LD_LIBRARY_PATH | |
248 setting */ | |
249 | |
250 int running = /* What data model is being ILP32 => | |
251 32 bit vm; LP64 => 64 bit vm */ | |
252 #ifdef _LP64 | |
253 64; | |
254 #else | |
255 32; | |
256 #endif | |
257 | |
258 int wanted = running; /* What data mode is being | |
259 asked for? Current model is | |
260 fine unless another model | |
261 is asked for */ | |
262 | |
263 char* new_runpath = NULL; /* desired new LD_LIBRARY_PATH string */ | |
264 char* newpath = NULL; /* path on new LD_LIBRARY_PATH */ | |
265 char* lastslash = NULL; | |
266 | |
267 char** newenvp = NULL; /* current environment */ | |
268 | |
269 char** newargv = NULL; | |
270 int newargc = 0; | |
271 #ifdef __sun | |
272 char* dmpath = NULL; /* data model specific LD_LIBRARY_PATH, | |
273 Solaris only */ | |
274 #endif | |
275 | |
276 /* | |
277 * Starting in 1.5, all unix platforms accept the -d32 and -d64 | |
278 * options. On platforms where only one data-model is supported | |
279 * (e.g. ia-64 Linux), using the flag for the other data model is | |
280 * an error and will terminate the program. | |
281 */ | |
282 | |
283 { /* open new scope to declare local variables */ | |
284 int i; | |
285 | |
286 newargv = (char **)MemAlloc((argc+1) * sizeof(*newargv)); | |
287 newargv[newargc++] = argv[0]; | |
288 | |
289 /* scan for data model arguments and remove from argument list; | |
290 last occurrence determines desired data model */ | |
291 for (i=1; i < argc; i++) { | |
292 | |
293 if (strcmp(argv[i], "-J-d64") == 0 || strcmp(argv[i], "-d64") == 0) { | |
294 wanted = 64; | |
295 continue; | |
296 } | |
297 if (strcmp(argv[i], "-J-d32") == 0 || strcmp(argv[i], "-d32") == 0) { | |
298 wanted = 32; | |
299 continue; | |
300 } | |
301 newargv[newargc++] = argv[i]; | |
302 | |
303 #ifdef JAVA_ARGS | |
304 if (argv[i][0] != '-') | |
305 continue; | |
306 #else | |
307 if (strcmp(argv[i], "-classpath") == 0 || strcmp(argv[i], "-cp") == 0) { | |
308 i++; | |
309 if (i >= argc) break; | |
310 newargv[newargc++] = argv[i]; | |
311 continue; | |
312 } | |
313 if (argv[i][0] != '-') { i++; break; } | |
314 #endif | |
315 } | |
316 | |
317 /* copy rest of args [i .. argc) */ | |
318 while (i < argc) { | |
319 newargv[newargc++] = argv[i++]; | |
320 } | |
321 newargv[newargc] = NULL; | |
322 | |
323 /* | |
324 * newargv has all proper arguments here | |
325 */ | |
326 | |
327 argc = newargc; | |
328 argv = newargv; | |
329 } | |
330 | |
331 /* If the data model is not changing, it is an error if the | |
332 jvmpath does not exist */ | |
333 if (wanted == running) { | |
334 /* Find out where the JRE is that we will be using. */ | |
335 if (!GetJREPath(jrepath, so_jrepath, arch, JNI_FALSE) ) { | |
336 fprintf(stderr, "Error: could not find Java 2 Runtime Environment.\n"); | |
337 exit(2); | |
338 } | |
339 | |
340 /* Find the specified JVM type */ | |
341 if (ReadKnownVMs(jrepath, arch, JNI_FALSE) < 1) { | |
342 fprintf(stderr, "Error: no known VMs. (check for corrupt jvm.cfg file)\n"); | |
343 exit(1); | |
344 } | |
345 | |
346 jvmpath[0] = '\0'; | |
347 jvmtype = CheckJvmType(_argcp, _argvp, JNI_FALSE); | |
348 | |
349 if (!GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath, arch )) { | |
350 fprintf(stderr, "Error: no `%s' JVM at `%s'.\n", jvmtype, jvmpath); | |
351 exit(4); | |
352 } | |
353 } else { /* do the same speculatively or exit */ | |
354 #ifdef DUAL_MODE | |
355 if (running != wanted) { | |
356 /* Find out where the JRE is that we will be using. */ | |
357 if (!GetJREPath(jrepath, so_jrepath, ((wanted==64)?BIG_ARCH:SMALL_ARCH), JNI_TRUE)) { | |
358 goto EndDataModelSpeculate; | |
359 } | |
360 | |
361 /* | |
362 * Read in jvm.cfg for target data model and process vm | |
363 * selection options. | |
364 */ | |
365 if (ReadKnownVMs(jrepath, ((wanted==64)?BIG_ARCH:SMALL_ARCH), JNI_TRUE) < 1) { | |
366 goto EndDataModelSpeculate; | |
367 } | |
368 jvmpath[0] = '\0'; | |
369 jvmtype = CheckJvmType(_argcp, _argvp, JNI_TRUE); | |
370 /* exec child can do error checking on the existence of the path */ | |
371 jvmpathExists = GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath, | |
372 ((wanted==64)?BIG_ARCH:SMALL_ARCH)); | |
373 | |
374 } | |
375 EndDataModelSpeculate: /* give up and let other code report error message */ | |
376 ; | |
377 #else | |
378 fprintf(stderr, "Running a %d-bit JVM is not supported on this platform.\n", wanted); | |
379 exit(1); | |
380 #endif | |
381 } | |
382 | |
383 /* | |
384 * We will set the LD_LIBRARY_PATH as follows: | |
385 * | |
386 * o $JVMPATH (directory portion only) | |
387 * o $JRE/lib/$ARCH | |
388 * o $JRE/../lib/$ARCH | |
389 * | |
390 * followed by the user's previous effective LD_LIBRARY_PATH, if | |
391 * any. | |
392 */ | |
393 | |
394 #ifdef __sun | |
395 /* | |
396 * Starting in Solaris 7, ld.so.1 supports three LD_LIBRARY_PATH | |
397 * variables: | |
398 * | |
399 * 1. LD_LIBRARY_PATH -- used for 32 and 64 bit searches if | |
400 * data-model specific variables are not set. | |
401 * | |
402 * 2. LD_LIBRARY_PATH_64 -- overrides and replaces LD_LIBRARY_PATH | |
403 * for 64-bit binaries. | |
404 * | |
405 * 3. LD_LIBRARY_PATH_32 -- overrides and replaces LD_LIBRARY_PATH | |
406 * for 32-bit binaries. | |
407 * | |
408 * The vm uses LD_LIBRARY_PATH to set the java.library.path system | |
409 * property. To shield the vm from the complication of multiple | |
410 * LD_LIBRARY_PATH variables, if the appropriate data model | |
411 * specific variable is set, we will act as if LD_LIBRARY_PATH had | |
412 * the value of the data model specific variant and the data model | |
413 * specific variant will be unset. Note that the variable for the | |
414 * *wanted* data model must be used (if it is set), not simply the | |
415 * current running data model. | |
416 */ | |
417 | |
418 switch(wanted) { | |
419 case 0: | |
420 if(running == 32) { | |
421 dmpath = getenv("LD_LIBRARY_PATH_32"); | |
422 wanted = 32; | |
423 } | |
424 else { | |
425 dmpath = getenv("LD_LIBRARY_PATH_64"); | |
426 wanted = 64; | |
427 } | |
428 break; | |
429 | |
430 case 32: | |
431 dmpath = getenv("LD_LIBRARY_PATH_32"); | |
432 break; | |
433 | |
434 case 64: | |
435 dmpath = getenv("LD_LIBRARY_PATH_64"); | |
436 break; | |
437 | |
438 default: | |
439 fprintf(stderr, "Improper value at line %d.", __LINE__); | |
440 exit(1); /* unknown value in wanted */ | |
441 break; | |
442 } | |
443 | |
444 /* | |
445 * If dmpath is NULL, the relevant data model specific variable is | |
446 * not set and normal LD_LIBRARY_PATH should be used. | |
447 */ | |
448 if( dmpath == NULL) { | |
449 runpath = getenv("LD_LIBRARY_PATH"); | |
450 } | |
451 else { | |
452 runpath = dmpath; | |
453 } | |
454 #else | |
455 /* | |
456 * If not on Solaris, assume only a single LD_LIBRARY_PATH | |
457 * variable. | |
458 */ | |
459 runpath = getenv("LD_LIBRARY_PATH"); | |
460 #endif /* __sun */ | |
461 | |
462 #ifdef __linux | |
463 /* | |
464 * On linux, if a binary is running as sgid or suid, glibc sets | |
465 * LD_LIBRARY_PATH to the empty string for security purposes. (In | |
466 * contrast, on Solaris the LD_LIBRARY_PATH variable for a | |
467 * privileged binary does not lose its settings; but the dynamic | |
468 * linker does apply more scrutiny to the path.) The launcher uses | |
469 * the value of LD_LIBRARY_PATH to prevent an exec loop. | |
470 * Therefore, if we are running sgid or suid, this function's | |
471 * setting of LD_LIBRARY_PATH will be ineffective and we should | |
472 * return from the function now. Getting the right libraries to | |
473 * be found must be handled through other mechanisms. | |
474 */ | |
475 if((getgid() != getegid()) || (getuid() != geteuid()) ) { | |
476 return; | |
477 } | |
478 #endif | |
479 | |
480 /* runpath contains current effective LD_LIBRARY_PATH setting */ | |
481 | |
482 jvmpath = strdup(jvmpath); | |
483 new_runpath = MemAlloc( ((runpath!=NULL)?strlen(runpath):0) + | |
484 2*strlen(jrepath) + 2*strlen(arch) + | |
485 strlen(jvmpath) + 52); | |
486 newpath = new_runpath + strlen("LD_LIBRARY_PATH="); | |
487 | |
488 | |
489 /* | |
490 * Create desired LD_LIBRARY_PATH value for target data model. | |
491 */ | |
492 { | |
493 /* remove the name of the .so from the JVM path */ | |
494 lastslash = strrchr(jvmpath, '/'); | |
495 if (lastslash) | |
496 *lastslash = '\0'; | |
497 | |
498 | |
499 /* jvmpath, ((running != wanted)?((wanted==64)?"/"BIG_ARCH:"/.."):""), */ | |
500 | |
501 sprintf(new_runpath, "LD_LIBRARY_PATH=" | |
502 "%s:" | |
503 "%s/lib/%s:" | |
504 "%s/../lib/%s", | |
505 jvmpath, | |
506 #ifdef DUAL_MODE | |
507 jrepath, ((wanted==64)?BIG_ARCH:SMALL_ARCH), | |
508 jrepath, ((wanted==64)?BIG_ARCH:SMALL_ARCH) | |
509 #else | |
510 jrepath, arch, | |
511 jrepath, arch | |
512 #endif | |
513 ); | |
514 | |
515 | |
516 /* | |
517 * Check to make sure that the prefix of the current path is the | |
518 * desired environment variable setting. | |
519 */ | |
520 if (runpath != NULL && | |
521 strncmp(newpath, runpath, strlen(newpath))==0 && | |
522 (runpath[strlen(newpath)] == 0 || runpath[strlen(newpath)] == ':') && | |
523 (running == wanted) /* data model does not have to be changed */ | |
524 #ifdef __sun | |
525 && (dmpath == NULL) /* data model specific variables not set */ | |
526 #endif | |
527 ) { | |
528 | |
529 return; | |
530 | |
531 } | |
532 } | |
533 | |
534 /* | |
535 * Place the desired environment setting onto the prefix of | |
536 * LD_LIBRARY_PATH. Note that this prevents any possible infinite | |
537 * loop of execv() because we test for the prefix, above. | |
538 */ | |
539 if (runpath != 0) { | |
540 strcat(new_runpath, ":"); | |
541 strcat(new_runpath, runpath); | |
542 } | |
543 | |
544 if( putenv(new_runpath) != 0) { | |
545 exit(1); /* problem allocating memory; LD_LIBRARY_PATH not set | |
546 properly */ | |
547 } | |
548 | |
549 /* | |
550 * Unix systems document that they look at LD_LIBRARY_PATH only | |
551 * once at startup, so we have to re-exec the current executable | |
552 * to get the changed environment variable to have an effect. | |
553 */ | |
554 | |
555 #ifdef __sun | |
556 /* | |
557 * If dmpath is not NULL, remove the data model specific string | |
558 * in the environment for the exec'ed child. | |
559 */ | |
560 | |
561 if( dmpath != NULL) | |
562 (void)UnsetEnv((wanted==32)?"LD_LIBRARY_PATH_32":"LD_LIBRARY_PATH_64"); | |
563 #endif | |
564 | |
565 newenvp = environ; | |
566 | |
567 { | |
568 char *newexec = execname; | |
569 #ifdef DUAL_MODE | |
570 /* | |
571 * If the data model is being changed, the path to the | |
572 * executable must be updated accordingly; the executable name | |
573 * and directory the executable resides in are separate. In the | |
574 * case of 32 => 64, the new bits are assumed to reside in, e.g. | |
575 * "olddir/BIGARCH/execname"; in the case of 64 => 32, | |
576 * the bits are assumed to be in "olddir/../execname". For example, | |
577 * | |
578 * olddir/sparcv9/execname | |
579 * olddir/amd64/execname | |
580 * | |
581 * for Solaris SPARC and Linux amd64, respectively. | |
582 */ | |
583 | |
584 if (running != wanted) { | |
585 char *oldexec = strcpy(MemAlloc(strlen(execname) + 1), execname); | |
586 char *olddir = oldexec; | |
587 char *oldbase = strrchr(oldexec, '/'); | |
588 | |
589 | |
590 newexec = MemAlloc(strlen(execname) + 20); | |
591 *oldbase++ = 0; | |
592 sprintf(newexec, "%s/%s/%s", olddir, | |
593 ((wanted==64) ? BIG_ARCH : ".."), oldbase); | |
594 argv[0] = newexec; | |
595 } | |
596 #endif | |
597 | |
598 execve(newexec, argv, newenvp); | |
599 perror("execve()"); | |
600 | |
601 fprintf(stderr, "Error trying to exec %s.\n", newexec); | |
602 fprintf(stderr, "Check if file exists and permissions are set correctly.\n"); | |
603 | |
604 #ifdef DUAL_MODE | |
605 if (running != wanted) { | |
606 fprintf(stderr, "Failed to start a %d-bit JVM process from a %d-bit JVM.\n", | |
607 wanted, running); | |
608 # ifdef __sun | |
609 | |
610 # ifdef __sparc | |
611 fprintf(stderr, "Verify all necessary J2SE components have been installed.\n" ); | |
612 fprintf(stderr, | |
613 "(Solaris SPARC 64-bit components must be installed after 32-bit components.)\n" ); | |
614 # else | |
615 fprintf(stderr, "Either 64-bit processes are not supported by this platform\n"); | |
616 fprintf(stderr, "or the 64-bit components have not been installed.\n"); | |
617 # endif | |
618 } | |
619 # endif | |
620 #endif | |
621 | |
622 } | |
623 | |
624 exit(1); | |
625 } | |
626 | |
627 #else /* ifndef GAMMA */ | |
628 | |
629 /* gamma launcher is simpler in that it doesn't handle VM flavors, data */ | |
630 /* model, LD_LIBRARY_PATH, etc. Assuming everything is set-up correctly */ | |
631 /* all we need to do here is to return correct path names. See also */ | |
632 /* GetJVMPath() and GetApplicationHome(). */ | |
633 | |
634 { char *arch = (char *)GetArch(); /* like sparc or sparcv9 */ | |
635 char *p; | |
636 | |
637 if (!GetJREPath(jrepath, so_jrepath, arch, JNI_FALSE) ) { | |
638 fprintf(stderr, "Error: could not find Java 2 Runtime Environment.\n"); | |
639 exit(2); | |
640 } | |
641 | |
642 if (!GetJVMPath(jrepath, NULL, jvmpath, so_jvmpath, arch )) { | |
643 fprintf(stderr, "Error: no JVM at `%s'.\n", jvmpath); | |
644 exit(4); | |
645 } | |
646 } | |
647 | |
648 #endif /* ifndef GAMMA */ | |
649 } | |
650 | |
651 | |
652 /* | |
653 * On Solaris VM choosing is done by the launcher (java.c). | |
654 */ | |
655 static jboolean | |
656 GetJVMPath(const char *jrepath, const char *jvmtype, | |
657 char *jvmpath, jint jvmpathsize, char * arch) | |
658 { | |
659 struct stat s; | |
660 | |
661 #ifndef GAMMA | |
662 if (strchr(jvmtype, '/')) { | |
663 sprintf(jvmpath, "%s/" JVM_DLL, jvmtype); | |
664 } else { | |
665 sprintf(jvmpath, "%s/lib/%s/%s/" JVM_DLL, jrepath, arch, jvmtype); | |
666 } | |
667 #else | |
668 /* For gamma launcher, JVM is either built-in or in the same directory. */ | |
669 /* Either way we return "<exe_path>/libjvm.so" where <exe_path> is the */ | |
670 /* directory where gamma launcher is located. */ | |
671 | |
672 char *p; | |
673 | |
674 snprintf(jvmpath, jvmpathsize, "%s", GetExecname()); | |
675 p = strrchr(jvmpath, '/'); | |
676 if (p) { | |
677 /* replace executable name with libjvm.so */ | |
678 snprintf(p + 1, jvmpathsize - (p + 1 - jvmpath), "%s", JVM_DLL); | |
679 } else { | |
680 /* this case shouldn't happen */ | |
681 snprintf(jvmpath, jvmpathsize, "%s", JVM_DLL); | |
682 } | |
683 #endif | |
684 | |
685 if (_launcher_debug) | |
686 printf("Does `%s' exist ... ", jvmpath); | |
687 | |
688 if (stat(jvmpath, &s) == 0) { | |
689 if (_launcher_debug) | |
690 printf("yes.\n"); | |
691 return JNI_TRUE; | |
692 } else { | |
693 if (_launcher_debug) | |
694 printf("no.\n"); | |
695 return JNI_FALSE; | |
696 } | |
697 } | |
698 | |
699 /* | |
700 * Find path to JRE based on .exe's location or registry settings. | |
701 */ | |
702 static jboolean | |
703 GetJREPath(char *path, jint pathsize, char * arch, jboolean speculative) | |
704 { | |
705 char libjava[MAXPATHLEN]; | |
706 | |
707 if (GetApplicationHome(path, pathsize)) { | |
708 /* Is JRE co-located with the application? */ | |
709 sprintf(libjava, "%s/lib/%s/" JAVA_DLL, path, arch); | |
710 if (access(libjava, F_OK) == 0) { | |
711 goto found; | |
712 } | |
713 | |
714 /* Does the app ship a private JRE in <apphome>/jre directory? */ | |
715 sprintf(libjava, "%s/jre/lib/%s/" JAVA_DLL, path, arch); | |
716 if (access(libjava, F_OK) == 0) { | |
717 strcat(path, "/jre"); | |
718 goto found; | |
719 } | |
720 } | |
721 | |
722 if (!speculative) | |
723 fprintf(stderr, "Error: could not find " JAVA_DLL "\n"); | |
724 return JNI_FALSE; | |
725 | |
726 found: | |
727 if (_launcher_debug) | |
728 printf("JRE path is %s\n", path); | |
729 return JNI_TRUE; | |
730 } | |
731 | |
732 jboolean | |
733 LoadJavaVM(const char *jvmpath, InvocationFunctions *ifn) | |
734 { | |
735 #ifdef GAMMA | |
736 /* JVM is directly linked with gamma launcher; no dlopen() */ | |
737 ifn->CreateJavaVM = JNI_CreateJavaVM; | |
738 ifn->GetDefaultJavaVMInitArgs = JNI_GetDefaultJavaVMInitArgs; | |
739 return JNI_TRUE; | |
740 #else | |
741 Dl_info dlinfo; | |
742 void *libjvm; | |
743 | |
744 if (_launcher_debug) { | |
745 printf("JVM path is %s\n", jvmpath); | |
746 } | |
747 | |
748 libjvm = dlopen(jvmpath, RTLD_NOW + RTLD_GLOBAL); | |
749 if (libjvm == NULL) { | |
750 #if defined(__sparc) && !defined(_LP64) /* i.e. 32-bit sparc */ | |
751 FILE * fp; | |
752 Elf32_Ehdr elf_head; | |
753 int count; | |
754 int location; | |
755 | |
756 fp = fopen(jvmpath, "r"); | |
757 if(fp == NULL) | |
758 goto error; | |
759 | |
760 /* read in elf header */ | |
761 count = fread((void*)(&elf_head), sizeof(Elf32_Ehdr), 1, fp); | |
762 fclose(fp); | |
763 if(count < 1) | |
764 goto error; | |
765 | |
766 /* | |
767 * Check for running a server vm (compiled with -xarch=v8plus) | |
768 * on a stock v8 processor. In this case, the machine type in | |
769 * the elf header would not be included the architecture list | |
770 * provided by the isalist command, which is turn is gotten from | |
771 * sysinfo. This case cannot occur on 64-bit hardware and thus | |
772 * does not have to be checked for in binaries with an LP64 data | |
773 * model. | |
774 */ | |
775 if(elf_head.e_machine == EM_SPARC32PLUS) { | |
776 char buf[257]; /* recommended buffer size from sysinfo man | |
777 page */ | |
778 long length; | |
779 char* location; | |
780 | |
781 length = sysinfo(SI_ISALIST, buf, 257); | |
782 if(length > 0) { | |
783 location = strstr(buf, "sparcv8plus "); | |
784 if(location == NULL) { | |
785 fprintf(stderr, "SPARC V8 processor detected; Server compiler requires V9 or better.\n"); | |
786 fprintf(stderr, "Use Client compiler on V8 processors.\n"); | |
787 fprintf(stderr, "Could not create the Java virtual machine.\n"); | |
788 return JNI_FALSE; | |
789 } | |
790 } | |
791 } | |
792 #endif | |
793 fprintf(stderr, "dl failure on line %d", __LINE__); | |
794 goto error; | |
795 } | |
796 | |
797 ifn->CreateJavaVM = (CreateJavaVM_t) | |
798 dlsym(libjvm, "JNI_CreateJavaVM"); | |
799 if (ifn->CreateJavaVM == NULL) | |
800 goto error; | |
801 | |
802 ifn->GetDefaultJavaVMInitArgs = (GetDefaultJavaVMInitArgs_t) | |
803 dlsym(libjvm, "JNI_GetDefaultJavaVMInitArgs"); | |
804 if (ifn->GetDefaultJavaVMInitArgs == NULL) | |
805 goto error; | |
806 | |
807 return JNI_TRUE; | |
808 | |
809 error: | |
810 fprintf(stderr, "Error: failed %s, because %s\n", jvmpath, dlerror()); | |
811 return JNI_FALSE; | |
812 #endif /* GAMMA */ | |
813 } | |
814 | |
815 /* | |
816 * Get the path to the file that has the usage message for -X options. | |
817 */ | |
818 void | |
819 GetXUsagePath(char *buf, jint bufsize) | |
820 { | |
821 static const char Xusage_txt[] = "/Xusage.txt"; | |
822 Dl_info dlinfo; | |
823 | |
824 /* we use RTLD_NOW because of problems with ld.so.1 and green threads */ | |
825 dladdr(dlsym(dlopen(JVM_DLL, RTLD_NOW), "JNI_CreateJavaVM"), &dlinfo); | |
826 strncpy(buf, (char *)dlinfo.dli_fname, bufsize - sizeof(Xusage_txt)); | |
827 | |
828 buf[bufsize-1] = '\0'; | |
829 strcpy(strrchr(buf, '/'), Xusage_txt); | |
830 } | |
831 | |
832 /* | |
833 * If app is "/foo/bin/javac", or "/foo/bin/sparcv9/javac" then put | |
834 * "/foo" into buf. | |
835 */ | |
836 jboolean | |
837 GetApplicationHome(char *buf, jint bufsize) | |
838 { | |
839 #ifdef __linux__ | |
840 char *execname = GetExecname(); | |
841 if (execname) { | |
842 strncpy(buf, execname, bufsize-1); | |
843 buf[bufsize-1] = '\0'; | |
844 } else { | |
845 return JNI_FALSE; | |
846 } | |
847 #else | |
848 Dl_info dlinfo; | |
849 | |
850 dladdr((void *)GetApplicationHome, &dlinfo); | |
851 if (realpath(dlinfo.dli_fname, buf) == NULL) { | |
852 fprintf(stderr, "Error: realpath(`%s') failed.\n", dlinfo.dli_fname); | |
853 return JNI_FALSE; | |
854 } | |
855 #endif | |
856 | |
857 #ifdef GAMMA | |
858 { | |
859 /* gamma launcher uses JAVA_HOME environment variable to find JDK/JRE */ | |
860 char* java_home_var = getenv("JAVA_HOME"); | |
861 if (java_home_var == NULL) { | |
862 printf("JAVA_HOME must point to a valid JDK/JRE to run gamma\n"); | |
863 return JNI_FALSE; | |
864 } | |
865 snprintf(buf, bufsize, "%s", java_home_var); | |
866 } | |
867 #else | |
868 if (strrchr(buf, '/') == 0) { | |
869 buf[0] = '\0'; | |
870 return JNI_FALSE; | |
871 } | |
872 *(strrchr(buf, '/')) = '\0'; /* executable file */ | |
873 if (strlen(buf) < 4 || strrchr(buf, '/') == 0) { | |
874 buf[0] = '\0'; | |
875 return JNI_FALSE; | |
876 } | |
877 if (strcmp("/bin", buf + strlen(buf) - 4) != 0) | |
878 *(strrchr(buf, '/')) = '\0'; /* sparcv9 or amd64 */ | |
879 if (strlen(buf) < 4 || strcmp("/bin", buf + strlen(buf) - 4) != 0) { | |
880 buf[0] = '\0'; | |
881 return JNI_FALSE; | |
882 } | |
883 *(strrchr(buf, '/')) = '\0'; /* bin */ | |
884 #endif /* GAMMA */ | |
885 | |
886 return JNI_TRUE; | |
887 } | |
888 | |
889 | |
890 /* | |
891 * Return true if the named program exists | |
892 */ | |
893 static int | |
894 ProgramExists(char *name) | |
895 { | |
896 struct stat sb; | |
897 if (stat(name, &sb) != 0) return 0; | |
898 if (S_ISDIR(sb.st_mode)) return 0; | |
899 return (sb.st_mode & S_IEXEC) != 0; | |
900 } | |
901 | |
902 | |
903 /* | |
904 * Find a command in a directory, returning the path. | |
905 */ | |
906 static char * | |
907 Resolve(char *indir, char *cmd) | |
908 { | |
909 char name[PATH_MAX + 2], *real; | |
910 | |
911 if ((strlen(indir) + strlen(cmd) + 1) > PATH_MAX) return 0; | |
912 sprintf(name, "%s%c%s", indir, FILE_SEPARATOR, cmd); | |
913 if (!ProgramExists(name)) return 0; | |
914 real = MemAlloc(PATH_MAX + 2); | |
915 if (!realpath(name, real)) | |
916 strcpy(real, name); | |
917 return real; | |
918 } | |
919 | |
920 | |
921 /* | |
922 * Find a path for the executable | |
923 */ | |
924 static char * | |
925 FindExecName(char *program) | |
926 { | |
927 char cwdbuf[PATH_MAX+2]; | |
928 char *path; | |
929 char *tmp_path; | |
930 char *f; | |
931 char *result = NULL; | |
932 | |
933 /* absolute path? */ | |
934 if (*program == FILE_SEPARATOR || | |
935 (FILE_SEPARATOR=='\\' && strrchr(program, ':'))) | |
936 return Resolve("", program+1); | |
937 | |
938 /* relative path? */ | |
939 if (strrchr(program, FILE_SEPARATOR) != 0) { | |
940 char buf[PATH_MAX+2]; | |
941 return Resolve(getcwd(cwdbuf, sizeof(cwdbuf)), program); | |
942 } | |
943 | |
944 /* from search path? */ | |
945 path = getenv("PATH"); | |
946 if (!path || !*path) path = "."; | |
947 tmp_path = MemAlloc(strlen(path) + 2); | |
948 strcpy(tmp_path, path); | |
949 | |
950 for (f=tmp_path; *f && result==0; ) { | |
951 char *s = f; | |
952 while (*f && (*f != PATH_SEPARATOR)) ++f; | |
953 if (*f) *f++ = 0; | |
954 if (*s == FILE_SEPARATOR) | |
955 result = Resolve(s, program); | |
956 else { | |
957 /* relative path element */ | |
958 char dir[2*PATH_MAX]; | |
959 sprintf(dir, "%s%c%s", getcwd(cwdbuf, sizeof(cwdbuf)), | |
960 FILE_SEPARATOR, s); | |
961 result = Resolve(dir, program); | |
962 } | |
963 if (result != 0) break; | |
964 } | |
965 | |
966 free(tmp_path); | |
967 return result; | |
968 } | |
969 | |
970 | |
971 /* Store the name of the executable once computed */ | |
972 static char *execname = NULL; | |
973 | |
974 /* | |
975 * Compute the name of the executable | |
976 * | |
977 * In order to re-exec securely we need the absolute path of the | |
978 * executable. On Solaris getexecname(3c) may not return an absolute | |
979 * path so we use dladdr to get the filename of the executable and | |
980 * then use realpath to derive an absolute path. From Solaris 9 | |
981 * onwards the filename returned in DL_info structure from dladdr is | |
982 * an absolute pathname so technically realpath isn't required. | |
983 * On Linux we read the executable name from /proc/self/exe. | |
984 * As a fallback, and for platforms other than Solaris and Linux, | |
985 * we use FindExecName to compute the executable name. | |
986 */ | |
987 static char * | |
988 SetExecname(char **argv) | |
989 { | |
990 char* exec_path = NULL; | |
991 | |
992 if (execname != NULL) /* Already determined */ | |
993 return (execname); | |
994 | |
995 #if defined(__sun) | |
996 { | |
997 Dl_info dlinfo; | |
998 if (dladdr((void*)&SetExecname, &dlinfo)) { | |
999 char *resolved = (char*)MemAlloc(PATH_MAX+1); | |
1000 if (resolved != NULL) { | |
1001 exec_path = realpath(dlinfo.dli_fname, resolved); | |
1002 if (exec_path == NULL) { | |
1003 free(resolved); | |
1004 } | |
1005 } | |
1006 } | |
1007 } | |
1008 #elif defined(__linux__) | |
1009 { | |
1010 const char* self = "/proc/self/exe"; | |
1011 char buf[PATH_MAX+1]; | |
1012 int len = readlink(self, buf, PATH_MAX); | |
1013 if (len >= 0) { | |
1014 buf[len] = '\0'; /* readlink doesn't nul terminate */ | |
1015 exec_path = strdup(buf); | |
1016 } | |
1017 } | |
1018 #else /* !__sun && !__linux */ | |
1019 { | |
1020 /* Not implemented */ | |
1021 } | |
1022 #endif | |
1023 | |
1024 if (exec_path == NULL) { | |
1025 exec_path = FindExecName(argv[0]); | |
1026 } | |
1027 execname = exec_path; | |
1028 return exec_path; | |
1029 } | |
1030 | |
1031 /* | |
1032 * Return the name of the executable. Used in java_md.c to find the JRE area. | |
1033 */ | |
1034 static char * | |
1035 GetExecname() { | |
1036 return execname; | |
1037 } | |
1038 | |
1039 void ReportErrorMessage(char * message, jboolean always) { | |
1040 if (always) { | |
1041 fprintf(stderr, "%s\n", message); | |
1042 } | |
1043 } | |
1044 | |
1045 void ReportErrorMessage2(char * format, char * string, jboolean always) { | |
1046 if (always) { | |
1047 fprintf(stderr, format, string); | |
1048 fprintf(stderr, "\n"); | |
1049 } | |
1050 } | |
1051 | |
1052 void ReportExceptionDescription(JNIEnv * env) { | |
1053 (*env)->ExceptionDescribe(env); | |
1054 } | |
1055 | |
1056 /* | |
1057 * Return JNI_TRUE for an option string that has no effect but should | |
1058 * _not_ be passed on to the vm; return JNI_FALSE otherwise. On | |
1059 * Solaris SPARC, this screening needs to be done if: | |
1060 * 1) LD_LIBRARY_PATH does _not_ need to be reset and | |
1061 * 2) -d32 or -d64 is passed to a binary with a matching data model | |
1062 * (the exec in SetLibraryPath removes -d<n> options and points the | |
1063 * exec to the proper binary). When this exec is not done, these options | |
1064 * would end up getting passed onto the vm. | |
1065 */ | |
1066 jboolean RemovableMachineDependentOption(char * option) { | |
1067 /* | |
1068 * Unconditionally remove both -d32 and -d64 options since only | |
1069 * the last such options has an effect; e.g. | |
1070 * java -d32 -d64 -d32 -version | |
1071 * is equivalent to | |
1072 * java -d32 -version | |
1073 */ | |
1074 | |
1075 if( (strcmp(option, "-d32") == 0 ) || | |
1076 (strcmp(option, "-d64") == 0 )) | |
1077 return JNI_TRUE; | |
1078 else | |
1079 return JNI_FALSE; | |
1080 } | |
1081 | |
1082 void PrintMachineDependentOptions() { | |
1083 fprintf(stdout, | |
1084 " -d32 use a 32-bit data model if available\n" | |
1085 "\n" | |
1086 " -d64 use a 64-bit data model if available\n"); | |
1087 return; | |
1088 } | |
1089 | |
1090 #ifndef GAMMA /* gamma launcher does not have ergonomics */ | |
1091 | |
1092 /* | |
1093 * The following methods (down to ServerClassMachine()) answer | |
1094 * the question about whether a machine is a "server-class" | |
1095 * machine. A server-class machine is loosely defined as one | |
1096 * with 2 or more processors and 2 gigabytes or more physical | |
1097 * memory. The definition of a processor is a physical package, | |
1098 * not a hyperthreaded chip masquerading as a multi-processor. | |
1099 * The definition of memory is also somewhat fuzzy, since x86 | |
1100 * machines seem not to report all the memory in their DIMMs, we | |
1101 * think because of memory mapping of graphics cards, etc. | |
1102 * | |
1103 * This code is somewhat more confused with #ifdef's than we'd | |
1104 * like because this file is used by both Solaris and Linux | |
1105 * platforms, and so needs to be parameterized for SPARC and | |
1106 * i586 hardware. The other Linux platforms (amd64 and ia64) | |
1107 * don't even ask this question, because they only come with | |
1108 * server JVMs. */ | |
1109 | |
1110 # define KB (1024UL) | |
1111 # define MB (1024UL * KB) | |
1112 # define GB (1024UL * MB) | |
1113 | |
1114 /* Compute physical memory by asking the OS */ | |
1115 uint64_t | |
1116 physical_memory(void) { | |
1117 const uint64_t pages = (uint64_t) sysconf(_SC_PHYS_PAGES); | |
1118 const uint64_t page_size = (uint64_t) sysconf(_SC_PAGESIZE); | |
1119 const uint64_t result = pages * page_size; | |
1120 # define UINT64_FORMAT "%" PRIu64 | |
1121 | |
1122 if (_launcher_debug) { | |
1123 printf("pages: " UINT64_FORMAT | |
1124 " page_size: " UINT64_FORMAT | |
1125 " physical memory: " UINT64_FORMAT " (%.3fGB)\n", | |
1126 pages, page_size, result, result / (double) GB); | |
1127 } | |
1128 return result; | |
1129 } | |
1130 | |
1131 #if defined(__sun) && defined(__sparc) | |
1132 | |
1133 /* Methods for solaris-sparc: these are easy. */ | |
1134 | |
1135 /* Ask the OS how many processors there are. */ | |
1136 unsigned long | |
1137 physical_processors(void) { | |
1138 const unsigned long sys_processors = sysconf(_SC_NPROCESSORS_CONF); | |
1139 | |
1140 if (_launcher_debug) { | |
1141 printf("sysconf(_SC_NPROCESSORS_CONF): %lu\n", sys_processors); | |
1142 } | |
1143 return sys_processors; | |
1144 } | |
1145 | |
1146 /* The solaris-sparc version of the "server-class" predicate. */ | |
1147 jboolean | |
1148 solaris_sparc_ServerClassMachine(void) { | |
1149 jboolean result = JNI_FALSE; | |
1150 /* How big is a server class machine? */ | |
1151 const unsigned long server_processors = 2UL; | |
1152 const uint64_t server_memory = 2UL * GB; | |
1153 const uint64_t actual_memory = physical_memory(); | |
1154 | |
1155 /* Is this a server class machine? */ | |
1156 if (actual_memory >= server_memory) { | |
1157 const unsigned long actual_processors = physical_processors(); | |
1158 if (actual_processors >= server_processors) { | |
1159 result = JNI_TRUE; | |
1160 } | |
1161 } | |
1162 if (_launcher_debug) { | |
1163 printf("solaris_" ARCH "_ServerClassMachine: %s\n", | |
1164 (result == JNI_TRUE ? "JNI_TRUE" : "JNI_FALSE")); | |
1165 } | |
1166 return result; | |
1167 } | |
1168 | |
1169 #endif /* __sun && __sparc */ | |
1170 | |
1171 #if defined(__sun) && defined(i586) | |
1172 | |
1173 /* | |
1174 * A utility method for asking the CPU about itself. | |
1175 * There's a corresponding version of linux-i586 | |
1176 * because the compilers are different. | |
1177 */ | |
1178 void | |
1179 get_cpuid(uint32_t arg, | |
1180 uint32_t* eaxp, | |
1181 uint32_t* ebxp, | |
1182 uint32_t* ecxp, | |
1183 uint32_t* edxp) { | |
1184 #ifdef _LP64 | |
1185 asm( | |
1186 /* rbx is a callee-saved register */ | |
1187 " movq %rbx, %r11 \n" | |
1188 /* rdx and rcx are 3rd and 4th argument registers */ | |
1189 " movq %rdx, %r10 \n" | |
1190 " movq %rcx, %r9 \n" | |
1191 " movl %edi, %eax \n" | |
1192 " cpuid \n" | |
1193 " movl %eax, (%rsi)\n" | |
1194 " movl %ebx, (%r10)\n" | |
1195 " movl %ecx, (%r9) \n" | |
1196 " movl %edx, (%r8) \n" | |
1197 /* Restore rbx */ | |
1198 " movq %r11, %rbx"); | |
1199 #else | |
1200 /* EBX is a callee-saved register */ | |
1201 asm(" pushl %ebx"); | |
1202 /* Need ESI for storing through arguments */ | |
1203 asm(" pushl %esi"); | |
1204 asm(" movl 8(%ebp), %eax \n" | |
1205 " cpuid \n" | |
1206 " movl 12(%ebp), %esi \n" | |
1207 " movl %eax, (%esi) \n" | |
1208 " movl 16(%ebp), %esi \n" | |
1209 " movl %ebx, (%esi) \n" | |
1210 " movl 20(%ebp), %esi \n" | |
1211 " movl %ecx, (%esi) \n" | |
1212 " movl 24(%ebp), %esi \n" | |
1213 " movl %edx, (%esi) "); | |
1214 /* Restore ESI and EBX */ | |
1215 asm(" popl %esi"); | |
1216 /* Restore EBX */ | |
1217 asm(" popl %ebx"); | |
1218 #endif | |
1219 } | |
1220 | |
1221 #endif /* __sun && i586 */ | |
1222 | |
1223 #if defined(__linux__) && defined(i586) | |
1224 | |
1225 /* | |
1226 * A utility method for asking the CPU about itself. | |
1227 * There's a corresponding version of solaris-i586 | |
1228 * because the compilers are different. | |
1229 */ | |
1230 void | |
1231 get_cpuid(uint32_t arg, | |
1232 uint32_t* eaxp, | |
1233 uint32_t* ebxp, | |
1234 uint32_t* ecxp, | |
1235 uint32_t* edxp) { | |
1236 #ifdef _LP64 | |
1237 __asm__ volatile (/* Instructions */ | |
1238 " movl %4, %%eax \n" | |
1239 " cpuid \n" | |
1240 " movl %%eax, (%0)\n" | |
1241 " movl %%ebx, (%1)\n" | |
1242 " movl %%ecx, (%2)\n" | |
1243 " movl %%edx, (%3)\n" | |
1244 : /* Outputs */ | |
1245 : /* Inputs */ | |
1246 "r" (eaxp), | |
1247 "r" (ebxp), | |
1248 "r" (ecxp), | |
1249 "r" (edxp), | |
1250 "r" (arg) | |
1251 : /* Clobbers */ | |
1252 "%rax", "%rbx", "%rcx", "%rdx", "memory" | |
1253 ); | |
1254 #else | |
1255 uint32_t value_of_eax = 0; | |
1256 uint32_t value_of_ebx = 0; | |
1257 uint32_t value_of_ecx = 0; | |
1258 uint32_t value_of_edx = 0; | |
1259 __asm__ volatile (/* Instructions */ | |
1260 /* ebx is callee-save, so push it */ | |
1261 /* even though it's in the clobbers section */ | |
1262 " pushl %%ebx \n" | |
1263 " movl %4, %%eax \n" | |
1264 " cpuid \n" | |
1265 " movl %%eax, %0 \n" | |
1266 " movl %%ebx, %1 \n" | |
1267 " movl %%ecx, %2 \n" | |
1268 " movl %%edx, %3 \n" | |
1269 /* restore ebx */ | |
1270 " popl %%ebx \n" | |
1271 | |
1272 : /* Outputs */ | |
1273 "=m" (value_of_eax), | |
1274 "=m" (value_of_ebx), | |
1275 "=m" (value_of_ecx), | |
1276 "=m" (value_of_edx) | |
1277 : /* Inputs */ | |
1278 "m" (arg) | |
1279 : /* Clobbers */ | |
1280 "%eax", "%ebx", "%ecx", "%edx" | |
1281 ); | |
1282 *eaxp = value_of_eax; | |
1283 *ebxp = value_of_ebx; | |
1284 *ecxp = value_of_ecx; | |
1285 *edxp = value_of_edx; | |
1286 #endif | |
1287 } | |
1288 | |
1289 #endif /* __linux__ && i586 */ | |
1290 | |
1291 #ifdef i586 | |
1292 /* | |
1293 * Routines shared by solaris-i586 and linux-i586. | |
1294 */ | |
1295 | |
1296 enum HyperThreadingSupport_enum { | |
1297 hts_supported = 1, | |
1298 hts_too_soon_to_tell = 0, | |
1299 hts_not_supported = -1, | |
1300 hts_not_pentium4 = -2, | |
1301 hts_not_intel = -3 | |
1302 }; | |
1303 typedef enum HyperThreadingSupport_enum HyperThreadingSupport; | |
1304 | |
1305 /* Determine if hyperthreading is supported */ | |
1306 HyperThreadingSupport | |
1307 hyperthreading_support(void) { | |
1308 HyperThreadingSupport result = hts_too_soon_to_tell; | |
1309 /* Bits 11 through 8 is family processor id */ | |
1310 # define FAMILY_ID_SHIFT 8 | |
1311 # define FAMILY_ID_MASK 0xf | |
1312 /* Bits 23 through 20 is extended family processor id */ | |
1313 # define EXT_FAMILY_ID_SHIFT 20 | |
1314 # define EXT_FAMILY_ID_MASK 0xf | |
1315 /* Pentium 4 family processor id */ | |
1316 # define PENTIUM4_FAMILY_ID 0xf | |
1317 /* Bit 28 indicates Hyper-Threading Technology support */ | |
1318 # define HT_BIT_SHIFT 28 | |
1319 # define HT_BIT_MASK 1 | |
1320 uint32_t vendor_id[3] = { 0U, 0U, 0U }; | |
1321 uint32_t value_of_eax = 0U; | |
1322 uint32_t value_of_edx = 0U; | |
1323 uint32_t dummy = 0U; | |
1324 | |
1325 /* Yes, this is supposed to be [0], [2], [1] */ | |
1326 get_cpuid(0, &dummy, &vendor_id[0], &vendor_id[2], &vendor_id[1]); | |
1327 if (_launcher_debug) { | |
1328 printf("vendor: %c %c %c %c %c %c %c %c %c %c %c %c \n", | |
1329 ((vendor_id[0] >> 0) & 0xff), | |
1330 ((vendor_id[0] >> 8) & 0xff), | |
1331 ((vendor_id[0] >> 16) & 0xff), | |
1332 ((vendor_id[0] >> 24) & 0xff), | |
1333 ((vendor_id[1] >> 0) & 0xff), | |
1334 ((vendor_id[1] >> 8) & 0xff), | |
1335 ((vendor_id[1] >> 16) & 0xff), | |
1336 ((vendor_id[1] >> 24) & 0xff), | |
1337 ((vendor_id[2] >> 0) & 0xff), | |
1338 ((vendor_id[2] >> 8) & 0xff), | |
1339 ((vendor_id[2] >> 16) & 0xff), | |
1340 ((vendor_id[2] >> 24) & 0xff)); | |
1341 } | |
1342 get_cpuid(1, &value_of_eax, &dummy, &dummy, &value_of_edx); | |
1343 if (_launcher_debug) { | |
1344 printf("value_of_eax: 0x%x value_of_edx: 0x%x\n", | |
1345 value_of_eax, value_of_edx); | |
1346 } | |
1347 if ((((value_of_eax >> FAMILY_ID_SHIFT) & FAMILY_ID_MASK) == PENTIUM4_FAMILY_ID) || | |
1348 (((value_of_eax >> EXT_FAMILY_ID_SHIFT) & EXT_FAMILY_ID_MASK) != 0)) { | |
1349 if ((((vendor_id[0] >> 0) & 0xff) == 'G') && | |
1350 (((vendor_id[0] >> 8) & 0xff) == 'e') && | |
1351 (((vendor_id[0] >> 16) & 0xff) == 'n') && | |
1352 (((vendor_id[0] >> 24) & 0xff) == 'u') && | |
1353 (((vendor_id[1] >> 0) & 0xff) == 'i') && | |
1354 (((vendor_id[1] >> 8) & 0xff) == 'n') && | |
1355 (((vendor_id[1] >> 16) & 0xff) == 'e') && | |
1356 (((vendor_id[1] >> 24) & 0xff) == 'I') && | |
1357 (((vendor_id[2] >> 0) & 0xff) == 'n') && | |
1358 (((vendor_id[2] >> 8) & 0xff) == 't') && | |
1359 (((vendor_id[2] >> 16) & 0xff) == 'e') && | |
1360 (((vendor_id[2] >> 24) & 0xff) == 'l')) { | |
1361 if (((value_of_edx >> HT_BIT_SHIFT) & HT_BIT_MASK) == HT_BIT_MASK) { | |
1362 if (_launcher_debug) { | |
1363 printf("Hyperthreading supported\n"); | |
1364 } | |
1365 result = hts_supported; | |
1366 } else { | |
1367 if (_launcher_debug) { | |
1368 printf("Hyperthreading not supported\n"); | |
1369 } | |
1370 result = hts_not_supported; | |
1371 } | |
1372 } else { | |
1373 if (_launcher_debug) { | |
1374 printf("Not GenuineIntel\n"); | |
1375 } | |
1376 result = hts_not_intel; | |
1377 } | |
1378 } else { | |
1379 if (_launcher_debug) { | |
1380 printf("not Pentium 4 or extended\n"); | |
1381 } | |
1382 result = hts_not_pentium4; | |
1383 } | |
1384 return result; | |
1385 } | |
1386 | |
1387 /* Determine how many logical processors there are per CPU */ | |
1388 unsigned int | |
1389 logical_processors_per_package(void) { | |
1390 /* | |
1391 * After CPUID with EAX==1, register EBX bits 23 through 16 | |
1392 * indicate the number of logical processors per package | |
1393 */ | |
1394 # define NUM_LOGICAL_SHIFT 16 | |
1395 # define NUM_LOGICAL_MASK 0xff | |
1396 unsigned int result = 1U; | |
1397 const HyperThreadingSupport hyperthreading = hyperthreading_support(); | |
1398 | |
1399 if (hyperthreading == hts_supported) { | |
1400 uint32_t value_of_ebx = 0U; | |
1401 uint32_t dummy = 0U; | |
1402 | |
1403 get_cpuid(1, &dummy, &value_of_ebx, &dummy, &dummy); | |
1404 result = (value_of_ebx >> NUM_LOGICAL_SHIFT) & NUM_LOGICAL_MASK; | |
1405 if (_launcher_debug) { | |
1406 printf("logical processors per package: %u\n", result); | |
1407 } | |
1408 } | |
1409 return result; | |
1410 } | |
1411 | |
1412 /* Compute the number of physical processors, not logical processors */ | |
1413 unsigned long | |
1414 physical_processors(void) { | |
1415 const long sys_processors = sysconf(_SC_NPROCESSORS_CONF); | |
1416 unsigned long result = sys_processors; | |
1417 | |
1418 if (_launcher_debug) { | |
1419 printf("sysconf(_SC_NPROCESSORS_CONF): %lu\n", sys_processors); | |
1420 } | |
1421 if (sys_processors > 1) { | |
1422 unsigned int logical_processors = logical_processors_per_package(); | |
1423 if (logical_processors > 1) { | |
1424 result = (unsigned long) sys_processors / logical_processors; | |
1425 } | |
1426 } | |
1427 if (_launcher_debug) { | |
1428 printf("physical processors: %lu\n", result); | |
1429 } | |
1430 return result; | |
1431 } | |
1432 | |
1433 #endif /* i586 */ | |
1434 | |
1435 #if defined(__sun) && defined(i586) | |
1436 | |
1437 /* The definition of a server-class machine for solaris-i586/amd64 */ | |
1438 jboolean | |
1439 solaris_i586_ServerClassMachine(void) { | |
1440 jboolean result = JNI_FALSE; | |
1441 /* How big is a server class machine? */ | |
1442 const unsigned long server_processors = 2UL; | |
1443 const uint64_t server_memory = 2UL * GB; | |
1444 /* | |
1445 * We seem not to get our full complement of memory. | |
1446 * We allow some part (1/8?) of the memory to be "missing", | |
1447 * based on the sizes of DIMMs, and maybe graphics cards. | |
1448 */ | |
1449 const uint64_t missing_memory = 256UL * MB; | |
1450 const uint64_t actual_memory = physical_memory(); | |
1451 | |
1452 /* Is this a server class machine? */ | |
1453 if (actual_memory >= (server_memory - missing_memory)) { | |
1454 const unsigned long actual_processors = physical_processors(); | |
1455 if (actual_processors >= server_processors) { | |
1456 result = JNI_TRUE; | |
1457 } | |
1458 } | |
1459 if (_launcher_debug) { | |
1460 printf("solaris_" ARCH "_ServerClassMachine: %s\n", | |
1461 (result == JNI_TRUE ? "true" : "false")); | |
1462 } | |
1463 return result; | |
1464 } | |
1465 | |
1466 #endif /* __sun && i586 */ | |
1467 | |
1468 #if defined(__linux__) && defined(i586) | |
1469 | |
1470 /* The definition of a server-class machine for linux-i586 */ | |
1471 jboolean | |
1472 linux_i586_ServerClassMachine(void) { | |
1473 jboolean result = JNI_FALSE; | |
1474 /* How big is a server class machine? */ | |
1475 const unsigned long server_processors = 2UL; | |
1476 const uint64_t server_memory = 2UL * GB; | |
1477 /* | |
1478 * We seem not to get our full complement of memory. | |
1479 * We allow some part (1/8?) of the memory to be "missing", | |
1480 * based on the sizes of DIMMs, and maybe graphics cards. | |
1481 */ | |
1482 const uint64_t missing_memory = 256UL * MB; | |
1483 const uint64_t actual_memory = physical_memory(); | |
1484 | |
1485 /* Is this a server class machine? */ | |
1486 if (actual_memory >= (server_memory - missing_memory)) { | |
1487 const unsigned long actual_processors = physical_processors(); | |
1488 if (actual_processors >= server_processors) { | |
1489 result = JNI_TRUE; | |
1490 } | |
1491 } | |
1492 if (_launcher_debug) { | |
1493 printf("linux_" ARCH "_ServerClassMachine: %s\n", | |
1494 (result == JNI_TRUE ? "true" : "false")); | |
1495 } | |
1496 return result; | |
1497 } | |
1498 | |
1499 #endif /* __linux__ && i586 */ | |
1500 | |
1501 /* Dispatch to the platform-specific definition of "server-class" */ | |
1502 jboolean | |
1503 ServerClassMachine(void) { | |
1504 jboolean result = JNI_FALSE; | |
1505 #if defined(__sun) && defined(__sparc) | |
1506 result = solaris_sparc_ServerClassMachine(); | |
1507 #elif defined(__sun) && defined(i586) | |
1508 result = solaris_i586_ServerClassMachine(); | |
1509 #elif defined(__linux__) && defined(i586) | |
1510 result = linux_i586_ServerClassMachine(); | |
1511 #else | |
1512 if (_launcher_debug) { | |
1513 printf("ServerClassMachine: returns default value of %s\n", | |
1514 (result == JNI_TRUE ? "true" : "false")); | |
1515 } | |
1516 #endif | |
1517 return result; | |
1518 } | |
1519 | |
1520 #endif /* ifndef GAMMA */ | |
1521 | |
1522 #ifndef GAMMA /* gamma launcher does not choose JDK/JRE/JVM */ | |
1523 | |
1524 /* | |
1525 * Since using the file system as a registry is a bit risky, perform | |
1526 * additional sanity checks on the identified directory to validate | |
1527 * it as a valid jre/sdk. | |
1528 * | |
1529 * Return 0 if the tests fail; otherwise return non-zero (true). | |
1530 * | |
1531 * Note that checking for anything more than the existence of an | |
1532 * executable object at bin/java relative to the path being checked | |
1533 * will break the regression tests. | |
1534 */ | |
1535 static int | |
1536 CheckSanity(char *path, char *dir) | |
1537 { | |
1538 char buffer[PATH_MAX]; | |
1539 | |
1540 if (strlen(path) + strlen(dir) + 11 > PATH_MAX) | |
1541 return (0); /* Silently reject "impossibly" long paths */ | |
1542 | |
1543 (void)strcat(strcat(strcat(strcpy(buffer, path), "/"), dir), "/bin/java"); | |
1544 return ((access(buffer, X_OK) == 0) ? 1 : 0); | |
1545 } | |
1546 | |
1547 /* | |
1548 * Determine if there is an acceptable JRE in the directory dirname. | |
1549 * Upon locating the "best" one, return a fully qualified path to | |
1550 * it. "Best" is defined as the most advanced JRE meeting the | |
1551 * constraints contained in the manifest_info. If no JRE in this | |
1552 * directory meets the constraints, return NULL. | |
1553 * | |
1554 * Note that we don't check for errors in reading the directory | |
1555 * (which would be done by checking errno). This is because it | |
1556 * doesn't matter if we get an error reading the directory, or | |
1557 * we just don't find anything interesting in the directory. We | |
1558 * just return NULL in either case. | |
1559 * | |
1560 * The historical names of j2sdk and j2re were changed to jdk and | |
1561 * jre respecively as part of the 1.5 rebranding effort. Since the | |
1562 * former names are legacy on Linux, they must be recognized for | |
1563 * all time. Fortunately, this is a minor cost. | |
1564 */ | |
1565 static char | |
1566 *ProcessDir(manifest_info *info, char *dirname) | |
1567 { | |
1568 DIR *dirp; | |
1569 struct dirent *dp; | |
1570 char *best = NULL; | |
1571 int offset; | |
1572 int best_offset = 0; | |
1573 char *ret_str = NULL; | |
1574 char buffer[PATH_MAX]; | |
1575 | |
1576 if ((dirp = opendir(dirname)) == NULL) | |
1577 return (NULL); | |
1578 | |
1579 do { | |
1580 if ((dp = readdir(dirp)) != NULL) { | |
1581 offset = 0; | |
1582 if ((strncmp(dp->d_name, "jre", 3) == 0) || | |
1583 (strncmp(dp->d_name, "jdk", 3) == 0)) | |
1584 offset = 3; | |
1585 else if (strncmp(dp->d_name, "j2re", 4) == 0) | |
1586 offset = 4; | |
1587 else if (strncmp(dp->d_name, "j2sdk", 5) == 0) | |
1588 offset = 5; | |
1589 if (offset > 0) { | |
1590 if ((acceptable_release(dp->d_name + offset, | |
1591 info->jre_version)) && CheckSanity(dirname, dp->d_name)) | |
1592 if ((best == NULL) || (exact_version_id( | |
1593 dp->d_name + offset, best + best_offset) > 0)) { | |
1594 if (best != NULL) | |
1595 free(best); | |
1596 best = strdup(dp->d_name); | |
1597 best_offset = offset; | |
1598 } | |
1599 } | |
1600 } | |
1601 } while (dp != NULL); | |
1602 (void) closedir(dirp); | |
1603 if (best == NULL) | |
1604 return (NULL); | |
1605 else { | |
1606 ret_str = MemAlloc(strlen(dirname) + strlen(best) + 2); | |
1607 ret_str = strcat(strcat(strcpy(ret_str, dirname), "/"), best); | |
1608 free(best); | |
1609 return (ret_str); | |
1610 } | |
1611 } | |
1612 | |
1613 /* | |
1614 * This is the global entry point. It examines the host for the optimal | |
1615 * JRE to be used by scanning a set of directories. The set of directories | |
1616 * is platform dependent and can be overridden by the environment | |
1617 * variable JAVA_VERSION_PATH. | |
1618 * | |
1619 * This routine itself simply determines the set of appropriate | |
1620 * directories before passing control onto ProcessDir(). | |
1621 */ | |
1622 char* | |
1623 LocateJRE(manifest_info* info) | |
1624 { | |
1625 char *path; | |
1626 char *home; | |
1627 char *target = NULL; | |
1628 char *dp; | |
1629 char *cp; | |
1630 | |
1631 /* | |
1632 * Start by getting JAVA_VERSION_PATH | |
1633 */ | |
1634 if (info->jre_restrict_search) | |
1635 path = strdup(system_dir); | |
1636 else if ((path = getenv("JAVA_VERSION_PATH")) != NULL) | |
1637 path = strdup(path); | |
1638 else | |
1639 if ((home = getenv("HOME")) != NULL) { | |
1640 path = (char *)MemAlloc(strlen(home) + 13); | |
1641 path = strcat(strcat(strcat(strcpy(path, home), | |
1642 user_dir), ":"), system_dir); | |
1643 } else | |
1644 path = strdup(system_dir); | |
1645 | |
1646 /* | |
1647 * Step through each directory on the path. Terminate the scan with | |
1648 * the first directory with an acceptable JRE. | |
1649 */ | |
1650 cp = dp = path; | |
1651 while (dp != NULL) { | |
1652 cp = strchr(dp, (int)':'); | |
1653 if (cp != NULL) | |
1654 *cp = (char)NULL; | |
1655 if ((target = ProcessDir(info, dp)) != NULL) | |
1656 break; | |
1657 dp = cp; | |
1658 if (dp != NULL) | |
1659 dp++; | |
1660 } | |
1661 free(path); | |
1662 return (target); | |
1663 } | |
1664 | |
1665 /* | |
1666 * Given a path to a jre to execute, this routine checks if this process | |
1667 * is indeed that jre. If not, it exec's that jre. | |
1668 * | |
1669 * We want to actually check the paths rather than just the version string | |
1670 * built into the executable, so that given version specification (and | |
1671 * JAVA_VERSION_PATH) will yield the exact same Java environment, regardless | |
1672 * of the version of the arbitrary launcher we start with. | |
1673 */ | |
1674 void | |
1675 ExecJRE(char *jre, char **argv) | |
1676 { | |
1677 char wanted[PATH_MAX]; | |
1678 char *execname; | |
1679 char *progname; | |
1680 | |
1681 /* | |
1682 * Resolve the real path to the directory containing the selected JRE. | |
1683 */ | |
1684 if (realpath(jre, wanted) == NULL) { | |
1685 fprintf(stderr, "Unable to resolve %s\n", jre); | |
1686 exit(1); | |
1687 } | |
1688 | |
1689 /* | |
1690 * Resolve the real path to the currently running launcher. | |
1691 */ | |
1692 execname = SetExecname(argv); | |
1693 if (execname == NULL) { | |
1694 fprintf(stderr, "Unable to resolve current executable\n"); | |
1695 exit(1); | |
1696 } | |
1697 | |
1698 /* | |
1699 * If the path to the selected JRE directory is a match to the initial | |
1700 * portion of the path to the currently executing JRE, we have a winner! | |
1701 * If so, just return. | |
1702 */ | |
1703 if (strncmp(wanted, execname, strlen(wanted)) == 0) | |
1704 return; /* I am the droid you were looking for */ | |
1705 | |
1706 /* | |
1707 * If this isn't the selected version, exec the selected version. | |
1708 */ | |
1709 #ifdef JAVA_ARGS /* javac, jar and friends. */ | |
1710 progname = "java"; | |
1711 #else /* java, oldjava, javaw and friends */ | |
1712 #ifdef PROGNAME | |
1713 progname = PROGNAME; | |
1714 #else | |
1715 progname = *argv; | |
1716 if ((s = strrchr(progname, FILE_SEPARATOR)) != 0) { | |
1717 progname = s + 1; | |
1718 } | |
1719 #endif /* PROGNAME */ | |
1720 #endif /* JAVA_ARGS */ | |
1721 | |
1722 /* | |
1723 * This should never happen (because of the selection code in SelectJRE), | |
1724 * but check for "impossibly" long path names just because buffer overruns | |
1725 * can be so deadly. | |
1726 */ | |
1727 if (strlen(wanted) + strlen(progname) + 6 > PATH_MAX) { | |
1728 fprintf(stderr, "Path length exceeds maximum length (PATH_MAX)\n"); | |
1729 exit(1); | |
1730 } | |
1731 | |
1732 /* | |
1733 * Construct the path and exec it. | |
1734 */ | |
1735 (void)strcat(strcat(wanted, "/bin/"), progname); | |
1736 argv[0] = progname; | |
1737 if (_launcher_debug) { | |
1738 int i; | |
1739 printf("execv(\"%s\"", wanted); | |
1740 for (i = 0; argv[i] != NULL; i++) | |
1741 printf(", \"%s\"", argv[i]); | |
1742 printf(")\n"); | |
1743 } | |
1744 execv(wanted, argv); | |
1745 fprintf(stderr, "Exec of %s failed\n", wanted); | |
1746 exit(1); | |
1747 } | |
1748 | |
1749 #endif /* ifndef GAMMA */ | |
1750 | |
1751 /* | |
1752 * "Borrowed" from Solaris 10 where the unsetenv() function is being added | |
1753 * to libc thanks to SUSv3 (Standard Unix Specification, version 3). As | |
1754 * such, in the fullness of time this will appear in libc on all relevant | |
1755 * Solaris/Linux platforms and maybe even the Windows platform. At that | |
1756 * time, this stub can be removed. | |
1757 * | |
1758 * This implementation removes the environment locking for multithreaded | |
1759 * applications. (We don't have access to these mutexes within libc and | |
1760 * the launcher isn't multithreaded.) Note that what remains is platform | |
1761 * independent, because it only relies on attributes that a POSIX environment | |
1762 * defines. | |
1763 * | |
1764 * Returns 0 on success, -1 on failure. | |
1765 * | |
1766 * Also removed was the setting of errno. The only value of errno set | |
1767 * was EINVAL ("Invalid Argument"). | |
1768 */ | |
1769 | |
1770 /* | |
1771 * s1(environ) is name=value | |
1772 * s2(name) is name(not the form of name=value). | |
1773 * if names match, return value of 1, else return 0 | |
1774 */ | |
1775 static int | |
1776 match_noeq(const char *s1, const char *s2) | |
1777 { | |
1778 while (*s1 == *s2++) { | |
1779 if (*s1++ == '=') | |
1780 return (1); | |
1781 } | |
1782 if (*s1 == '=' && s2[-1] == '\0') | |
1783 return (1); | |
1784 return (0); | |
1785 } | |
1786 | |
1787 /* | |
1788 * added for SUSv3 standard | |
1789 * | |
1790 * Delete entry from environ. | |
1791 * Do not free() memory! Other threads may be using it. | |
1792 * Keep it around forever. | |
1793 */ | |
1794 static int | |
1795 borrowed_unsetenv(const char *name) | |
1796 { | |
1797 long idx; /* index into environ */ | |
1798 | |
1799 if (name == NULL || *name == '\0' || | |
1800 strchr(name, '=') != NULL) { | |
1801 return (-1); | |
1802 } | |
1803 | |
1804 for (idx = 0; environ[idx] != NULL; idx++) { | |
1805 if (match_noeq(environ[idx], name)) | |
1806 break; | |
1807 } | |
1808 if (environ[idx] == NULL) { | |
1809 /* name not found but still a success */ | |
1810 return (0); | |
1811 } | |
1812 /* squeeze up one entry */ | |
1813 do { | |
1814 environ[idx] = environ[idx+1]; | |
1815 } while (environ[++idx] != NULL); | |
1816 | |
1817 return (0); | |
1818 } | |
1819 /* --- End of "borrowed" code --- */ | |
1820 | |
1821 /* | |
1822 * Wrapper for unsetenv() function. | |
1823 */ | |
1824 int | |
1825 UnsetEnv(char *name) | |
1826 { | |
1827 return(borrowed_unsetenv(name)); | |
1828 } | |
388 | 1829 |
1830 /* | |
1831 * The implementation for finding classes from the bootstrap | |
1832 * class loader, refer to java.h | |
1833 */ | |
1834 static FindClassFromBootLoader_t *findBootClass = NULL; | |
1835 | |
1836 jclass | |
1837 FindBootStrapClass(JNIEnv *env, const char* classname) | |
1838 { | |
1839 if (findBootClass == NULL) { | |
1840 findBootClass = (FindClassFromBootLoader_t *)dlsym(RTLD_DEFAULT, | |
1841 "JVM_FindClassFromBootLoader"); | |
1842 if (findBootClass == NULL) { | |
1843 fprintf(stderr, "Error: could not load method JVM_FindClassFromBootLoader"); | |
1844 return NULL; | |
1845 } | |
1846 } | |
1847 return findBootClass(env, classname, JNI_FALSE); | |
1848 } | |
1849 |