Mercurial > hg > truffle
annotate src/os/linux/launcher/java_md.c @ 1696:688a538aa654
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author | trims |
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date | Fri, 13 Aug 2010 10:55:42 -0700 |
parents | 126ea7725993 |
children | f95d63e2154a |
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0 | 1 /* |
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2 * Copyright (c) 1999, 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 |
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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" | |
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82 # elif defined(arm) |
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83 # define ARCH "arm" |
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84 # elif defined(PPC) |
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85 # define ARCH "ppc" |
0 | 86 # endif |
87 | |
88 #endif /* _LP64 */ | |
89 | |
90 #ifdef __sun | |
91 # define DUAL_MODE | |
92 # ifdef __sparc | |
93 # define BIG_ARCH "sparcv9" | |
94 # define SMALL_ARCH "sparc" | |
95 # else | |
96 # define BIG_ARCH "amd64" | |
97 # define SMALL_ARCH "i386" | |
98 # endif | |
99 # include <sys/systeminfo.h> | |
100 # include <sys/elf.h> | |
101 # include <stdio.h> | |
102 #else | |
103 # ifndef ARCH | |
104 # include <sys/systeminfo.h> | |
105 # endif | |
106 #endif | |
107 | |
108 #endif /* ifndef GAMMA */ | |
109 | |
110 /* pointer to environment */ | |
111 extern char **environ; | |
112 | |
113 #ifndef GAMMA | |
114 | |
115 /* | |
116 * A collection of useful strings. One should think of these as #define | |
117 * entries, but actual strings can be more efficient (with many compilers). | |
118 */ | |
119 #ifdef __linux__ | |
120 static const char *system_dir = "/usr/java"; | |
121 static const char *user_dir = "/java"; | |
122 #else /* Solaris */ | |
123 static const char *system_dir = "/usr/jdk"; | |
124 static const char *user_dir = "/jdk"; | |
125 #endif | |
126 | |
127 #endif /* ifndef GAMMA */ | |
128 | |
129 /* | |
130 * Flowchart of launcher execs and options processing on unix | |
131 * | |
132 * The selection of the proper vm shared library to open depends on | |
133 * several classes of command line options, including vm "flavor" | |
134 * options (-client, -server) and the data model options, -d32 and | |
135 * -d64, as well as a version specification which may have come from | |
136 * the command line or from the manifest of an executable jar file. | |
137 * The vm selection options are not passed to the running | |
138 * virtual machine; they must be screened out by the launcher. | |
139 * | |
140 * The version specification (if any) is processed first by the | |
141 * platform independent routine SelectVersion. This may result in | |
142 * the exec of the specified launcher version. | |
143 * | |
144 * Typically, the launcher execs at least once to ensure a suitable | |
145 * LD_LIBRARY_PATH is in effect for the process. The first exec | |
146 * screens out all the data model options; leaving the choice of data | |
147 * model implicit in the binary selected to run. However, in case no | |
148 * exec is done, the data model options are screened out before the vm | |
149 * is invoked. | |
150 * | |
151 * incoming argv ------------------------------ | |
152 * | | | |
153 * \|/ | | |
154 * CheckJVMType | | |
155 * (removes -client, -server, etc.) | | |
156 * \|/ | |
157 * CreateExecutionEnvironment | |
158 * (removes -d32 and -d64, | |
159 * determines desired data model, | |
160 * sets up LD_LIBRARY_PATH, | |
161 * and exec's) | |
162 * | | |
163 * -------------------------------------------- | |
164 * | | |
165 * \|/ | |
166 * exec child 1 incoming argv ----------------- | |
167 * | | | |
168 * \|/ | | |
169 * CheckJVMType | | |
170 * (removes -client, -server, etc.) | | |
171 * | \|/ | |
172 * | CreateExecutionEnvironment | |
173 * | (verifies desired data model | |
174 * | is running and acceptable | |
175 * | LD_LIBRARY_PATH; | |
176 * | no-op in child) | |
177 * | | |
178 * \|/ | |
179 * TranslateDashJArgs... | |
180 * (Prepare to pass args to vm) | |
181 * | | |
182 * | | |
183 * | | |
184 * \|/ | |
185 * ParseArguments | |
186 * (ignores -d32 and -d64, | |
187 * processes version options, | |
188 * creates argument list for vm, | |
189 * etc.) | |
190 * | |
191 */ | |
192 | |
193 static char *SetExecname(char **argv); | |
194 static char * GetExecname(); | |
195 static jboolean GetJVMPath(const char *jrepath, const char *jvmtype, | |
196 char *jvmpath, jint jvmpathsize, char * arch); | |
197 static jboolean GetJREPath(char *path, jint pathsize, char * arch, jboolean speculative); | |
198 | |
199 const char * | |
200 GetArch() | |
201 { | |
202 static char *arch = NULL; | |
203 static char buf[12]; | |
204 if (arch) { | |
205 return arch; | |
206 } | |
207 | |
208 #ifdef ARCH | |
209 strcpy(buf, ARCH); | |
210 #else | |
211 sysinfo(SI_ARCHITECTURE, buf, sizeof(buf)); | |
212 #endif | |
213 arch = buf; | |
214 return arch; | |
215 } | |
216 | |
217 void | |
218 CreateExecutionEnvironment(int *_argcp, | |
219 char ***_argvp, | |
220 char jrepath[], | |
221 jint so_jrepath, | |
222 char jvmpath[], | |
223 jint so_jvmpath, | |
224 char **original_argv) { | |
225 /* | |
226 * First, determine if we are running the desired data model. If we | |
227 * are running the desired data model, all the error messages | |
228 * associated with calling GetJREPath, ReadKnownVMs, etc. should be | |
229 * output. However, if we are not running the desired data model, | |
230 * some of the errors should be suppressed since it is more | |
231 * informative to issue an error message based on whether or not the | |
232 * os/processor combination has dual mode capabilities. | |
233 */ | |
234 | |
235 char *execname = NULL; | |
236 int original_argc = *_argcp; | |
237 jboolean jvmpathExists; | |
238 | |
239 /* Compute the name of the executable */ | |
240 execname = SetExecname(*_argvp); | |
241 | |
242 #ifndef GAMMA | |
243 /* Set the LD_LIBRARY_PATH environment variable, check data model | |
244 flags, and exec process, if needed */ | |
245 { | |
246 char *arch = (char *)GetArch(); /* like sparc or sparcv9 */ | |
247 char * jvmtype = NULL; | |
248 int argc = *_argcp; | |
249 char **argv = original_argv; | |
250 | |
251 char *runpath = NULL; /* existing effective LD_LIBRARY_PATH | |
252 setting */ | |
253 | |
254 int running = /* What data model is being ILP32 => | |
255 32 bit vm; LP64 => 64 bit vm */ | |
256 #ifdef _LP64 | |
257 64; | |
258 #else | |
259 32; | |
260 #endif | |
261 | |
262 int wanted = running; /* What data mode is being | |
263 asked for? Current model is | |
264 fine unless another model | |
265 is asked for */ | |
266 | |
267 char* new_runpath = NULL; /* desired new LD_LIBRARY_PATH string */ | |
268 char* newpath = NULL; /* path on new LD_LIBRARY_PATH */ | |
269 char* lastslash = NULL; | |
270 | |
271 char** newenvp = NULL; /* current environment */ | |
272 | |
273 char** newargv = NULL; | |
274 int newargc = 0; | |
275 #ifdef __sun | |
276 char* dmpath = NULL; /* data model specific LD_LIBRARY_PATH, | |
277 Solaris only */ | |
278 #endif | |
279 | |
280 /* | |
281 * Starting in 1.5, all unix platforms accept the -d32 and -d64 | |
282 * options. On platforms where only one data-model is supported | |
283 * (e.g. ia-64 Linux), using the flag for the other data model is | |
284 * an error and will terminate the program. | |
285 */ | |
286 | |
287 { /* open new scope to declare local variables */ | |
288 int i; | |
289 | |
290 newargv = (char **)MemAlloc((argc+1) * sizeof(*newargv)); | |
291 newargv[newargc++] = argv[0]; | |
292 | |
293 /* scan for data model arguments and remove from argument list; | |
294 last occurrence determines desired data model */ | |
295 for (i=1; i < argc; i++) { | |
296 | |
297 if (strcmp(argv[i], "-J-d64") == 0 || strcmp(argv[i], "-d64") == 0) { | |
298 wanted = 64; | |
299 continue; | |
300 } | |
301 if (strcmp(argv[i], "-J-d32") == 0 || strcmp(argv[i], "-d32") == 0) { | |
302 wanted = 32; | |
303 continue; | |
304 } | |
305 newargv[newargc++] = argv[i]; | |
306 | |
307 #ifdef JAVA_ARGS | |
308 if (argv[i][0] != '-') | |
309 continue; | |
310 #else | |
311 if (strcmp(argv[i], "-classpath") == 0 || strcmp(argv[i], "-cp") == 0) { | |
312 i++; | |
313 if (i >= argc) break; | |
314 newargv[newargc++] = argv[i]; | |
315 continue; | |
316 } | |
317 if (argv[i][0] != '-') { i++; break; } | |
318 #endif | |
319 } | |
320 | |
321 /* copy rest of args [i .. argc) */ | |
322 while (i < argc) { | |
323 newargv[newargc++] = argv[i++]; | |
324 } | |
325 newargv[newargc] = NULL; | |
326 | |
327 /* | |
328 * newargv has all proper arguments here | |
329 */ | |
330 | |
331 argc = newargc; | |
332 argv = newargv; | |
333 } | |
334 | |
335 /* If the data model is not changing, it is an error if the | |
336 jvmpath does not exist */ | |
337 if (wanted == running) { | |
338 /* Find out where the JRE is that we will be using. */ | |
339 if (!GetJREPath(jrepath, so_jrepath, arch, JNI_FALSE) ) { | |
340 fprintf(stderr, "Error: could not find Java 2 Runtime Environment.\n"); | |
341 exit(2); | |
342 } | |
343 | |
344 /* Find the specified JVM type */ | |
345 if (ReadKnownVMs(jrepath, arch, JNI_FALSE) < 1) { | |
346 fprintf(stderr, "Error: no known VMs. (check for corrupt jvm.cfg file)\n"); | |
347 exit(1); | |
348 } | |
349 | |
350 jvmpath[0] = '\0'; | |
351 jvmtype = CheckJvmType(_argcp, _argvp, JNI_FALSE); | |
352 | |
353 if (!GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath, arch )) { | |
354 fprintf(stderr, "Error: no `%s' JVM at `%s'.\n", jvmtype, jvmpath); | |
355 exit(4); | |
356 } | |
357 } else { /* do the same speculatively or exit */ | |
358 #ifdef DUAL_MODE | |
359 if (running != wanted) { | |
360 /* Find out where the JRE is that we will be using. */ | |
361 if (!GetJREPath(jrepath, so_jrepath, ((wanted==64)?BIG_ARCH:SMALL_ARCH), JNI_TRUE)) { | |
362 goto EndDataModelSpeculate; | |
363 } | |
364 | |
365 /* | |
366 * Read in jvm.cfg for target data model and process vm | |
367 * selection options. | |
368 */ | |
369 if (ReadKnownVMs(jrepath, ((wanted==64)?BIG_ARCH:SMALL_ARCH), JNI_TRUE) < 1) { | |
370 goto EndDataModelSpeculate; | |
371 } | |
372 jvmpath[0] = '\0'; | |
373 jvmtype = CheckJvmType(_argcp, _argvp, JNI_TRUE); | |
374 /* exec child can do error checking on the existence of the path */ | |
375 jvmpathExists = GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath, | |
376 ((wanted==64)?BIG_ARCH:SMALL_ARCH)); | |
377 | |
378 } | |
379 EndDataModelSpeculate: /* give up and let other code report error message */ | |
380 ; | |
381 #else | |
382 fprintf(stderr, "Running a %d-bit JVM is not supported on this platform.\n", wanted); | |
383 exit(1); | |
384 #endif | |
385 } | |
386 | |
387 /* | |
388 * We will set the LD_LIBRARY_PATH as follows: | |
389 * | |
390 * o $JVMPATH (directory portion only) | |
391 * o $JRE/lib/$ARCH | |
392 * o $JRE/../lib/$ARCH | |
393 * | |
394 * followed by the user's previous effective LD_LIBRARY_PATH, if | |
395 * any. | |
396 */ | |
397 | |
398 #ifdef __sun | |
399 /* | |
400 * Starting in Solaris 7, ld.so.1 supports three LD_LIBRARY_PATH | |
401 * variables: | |
402 * | |
403 * 1. LD_LIBRARY_PATH -- used for 32 and 64 bit searches if | |
404 * data-model specific variables are not set. | |
405 * | |
406 * 2. LD_LIBRARY_PATH_64 -- overrides and replaces LD_LIBRARY_PATH | |
407 * for 64-bit binaries. | |
408 * | |
409 * 3. LD_LIBRARY_PATH_32 -- overrides and replaces LD_LIBRARY_PATH | |
410 * for 32-bit binaries. | |
411 * | |
412 * The vm uses LD_LIBRARY_PATH to set the java.library.path system | |
413 * property. To shield the vm from the complication of multiple | |
414 * LD_LIBRARY_PATH variables, if the appropriate data model | |
415 * specific variable is set, we will act as if LD_LIBRARY_PATH had | |
416 * the value of the data model specific variant and the data model | |
417 * specific variant will be unset. Note that the variable for the | |
418 * *wanted* data model must be used (if it is set), not simply the | |
419 * current running data model. | |
420 */ | |
421 | |
422 switch(wanted) { | |
423 case 0: | |
424 if(running == 32) { | |
425 dmpath = getenv("LD_LIBRARY_PATH_32"); | |
426 wanted = 32; | |
427 } | |
428 else { | |
429 dmpath = getenv("LD_LIBRARY_PATH_64"); | |
430 wanted = 64; | |
431 } | |
432 break; | |
433 | |
434 case 32: | |
435 dmpath = getenv("LD_LIBRARY_PATH_32"); | |
436 break; | |
437 | |
438 case 64: | |
439 dmpath = getenv("LD_LIBRARY_PATH_64"); | |
440 break; | |
441 | |
442 default: | |
443 fprintf(stderr, "Improper value at line %d.", __LINE__); | |
444 exit(1); /* unknown value in wanted */ | |
445 break; | |
446 } | |
447 | |
448 /* | |
449 * If dmpath is NULL, the relevant data model specific variable is | |
450 * not set and normal LD_LIBRARY_PATH should be used. | |
451 */ | |
452 if( dmpath == NULL) { | |
453 runpath = getenv("LD_LIBRARY_PATH"); | |
454 } | |
455 else { | |
456 runpath = dmpath; | |
457 } | |
458 #else | |
459 /* | |
460 * If not on Solaris, assume only a single LD_LIBRARY_PATH | |
461 * variable. | |
462 */ | |
463 runpath = getenv("LD_LIBRARY_PATH"); | |
464 #endif /* __sun */ | |
465 | |
466 #ifdef __linux | |
467 /* | |
468 * On linux, if a binary is running as sgid or suid, glibc sets | |
469 * LD_LIBRARY_PATH to the empty string for security purposes. (In | |
470 * contrast, on Solaris the LD_LIBRARY_PATH variable for a | |
471 * privileged binary does not lose its settings; but the dynamic | |
472 * linker does apply more scrutiny to the path.) The launcher uses | |
473 * the value of LD_LIBRARY_PATH to prevent an exec loop. | |
474 * Therefore, if we are running sgid or suid, this function's | |
475 * setting of LD_LIBRARY_PATH will be ineffective and we should | |
476 * return from the function now. Getting the right libraries to | |
477 * be found must be handled through other mechanisms. | |
478 */ | |
479 if((getgid() != getegid()) || (getuid() != geteuid()) ) { | |
480 return; | |
481 } | |
482 #endif | |
483 | |
484 /* runpath contains current effective LD_LIBRARY_PATH setting */ | |
485 | |
486 jvmpath = strdup(jvmpath); | |
487 new_runpath = MemAlloc( ((runpath!=NULL)?strlen(runpath):0) + | |
488 2*strlen(jrepath) + 2*strlen(arch) + | |
489 strlen(jvmpath) + 52); | |
490 newpath = new_runpath + strlen("LD_LIBRARY_PATH="); | |
491 | |
492 | |
493 /* | |
494 * Create desired LD_LIBRARY_PATH value for target data model. | |
495 */ | |
496 { | |
497 /* remove the name of the .so from the JVM path */ | |
498 lastslash = strrchr(jvmpath, '/'); | |
499 if (lastslash) | |
500 *lastslash = '\0'; | |
501 | |
502 | |
503 /* jvmpath, ((running != wanted)?((wanted==64)?"/"BIG_ARCH:"/.."):""), */ | |
504 | |
505 sprintf(new_runpath, "LD_LIBRARY_PATH=" | |
506 "%s:" | |
507 "%s/lib/%s:" | |
508 "%s/../lib/%s", | |
509 jvmpath, | |
510 #ifdef DUAL_MODE | |
511 jrepath, ((wanted==64)?BIG_ARCH:SMALL_ARCH), | |
512 jrepath, ((wanted==64)?BIG_ARCH:SMALL_ARCH) | |
513 #else | |
514 jrepath, arch, | |
515 jrepath, arch | |
516 #endif | |
517 ); | |
518 | |
519 | |
520 /* | |
521 * Check to make sure that the prefix of the current path is the | |
522 * desired environment variable setting. | |
523 */ | |
524 if (runpath != NULL && | |
525 strncmp(newpath, runpath, strlen(newpath))==0 && | |
526 (runpath[strlen(newpath)] == 0 || runpath[strlen(newpath)] == ':') && | |
527 (running == wanted) /* data model does not have to be changed */ | |
528 #ifdef __sun | |
529 && (dmpath == NULL) /* data model specific variables not set */ | |
530 #endif | |
531 ) { | |
532 | |
533 return; | |
534 | |
535 } | |
536 } | |
537 | |
538 /* | |
539 * Place the desired environment setting onto the prefix of | |
540 * LD_LIBRARY_PATH. Note that this prevents any possible infinite | |
541 * loop of execv() because we test for the prefix, above. | |
542 */ | |
543 if (runpath != 0) { | |
544 strcat(new_runpath, ":"); | |
545 strcat(new_runpath, runpath); | |
546 } | |
547 | |
548 if( putenv(new_runpath) != 0) { | |
549 exit(1); /* problem allocating memory; LD_LIBRARY_PATH not set | |
550 properly */ | |
551 } | |
552 | |
553 /* | |
554 * Unix systems document that they look at LD_LIBRARY_PATH only | |
555 * once at startup, so we have to re-exec the current executable | |
556 * to get the changed environment variable to have an effect. | |
557 */ | |
558 | |
559 #ifdef __sun | |
560 /* | |
561 * If dmpath is not NULL, remove the data model specific string | |
562 * in the environment for the exec'ed child. | |
563 */ | |
564 | |
565 if( dmpath != NULL) | |
566 (void)UnsetEnv((wanted==32)?"LD_LIBRARY_PATH_32":"LD_LIBRARY_PATH_64"); | |
567 #endif | |
568 | |
569 newenvp = environ; | |
570 | |
571 { | |
572 char *newexec = execname; | |
573 #ifdef DUAL_MODE | |
574 /* | |
575 * If the data model is being changed, the path to the | |
576 * executable must be updated accordingly; the executable name | |
577 * and directory the executable resides in are separate. In the | |
578 * case of 32 => 64, the new bits are assumed to reside in, e.g. | |
579 * "olddir/BIGARCH/execname"; in the case of 64 => 32, | |
580 * the bits are assumed to be in "olddir/../execname". For example, | |
581 * | |
582 * olddir/sparcv9/execname | |
583 * olddir/amd64/execname | |
584 * | |
585 * for Solaris SPARC and Linux amd64, respectively. | |
586 */ | |
587 | |
588 if (running != wanted) { | |
589 char *oldexec = strcpy(MemAlloc(strlen(execname) + 1), execname); | |
590 char *olddir = oldexec; | |
591 char *oldbase = strrchr(oldexec, '/'); | |
592 | |
593 | |
594 newexec = MemAlloc(strlen(execname) + 20); | |
595 *oldbase++ = 0; | |
596 sprintf(newexec, "%s/%s/%s", olddir, | |
597 ((wanted==64) ? BIG_ARCH : ".."), oldbase); | |
598 argv[0] = newexec; | |
599 } | |
600 #endif | |
601 | |
602 execve(newexec, argv, newenvp); | |
603 perror("execve()"); | |
604 | |
605 fprintf(stderr, "Error trying to exec %s.\n", newexec); | |
606 fprintf(stderr, "Check if file exists and permissions are set correctly.\n"); | |
607 | |
608 #ifdef DUAL_MODE | |
609 if (running != wanted) { | |
610 fprintf(stderr, "Failed to start a %d-bit JVM process from a %d-bit JVM.\n", | |
611 wanted, running); | |
612 # ifdef __sun | |
613 | |
614 # ifdef __sparc | |
615 fprintf(stderr, "Verify all necessary J2SE components have been installed.\n" ); | |
616 fprintf(stderr, | |
617 "(Solaris SPARC 64-bit components must be installed after 32-bit components.)\n" ); | |
618 # else | |
619 fprintf(stderr, "Either 64-bit processes are not supported by this platform\n"); | |
620 fprintf(stderr, "or the 64-bit components have not been installed.\n"); | |
621 # endif | |
622 } | |
623 # endif | |
624 #endif | |
625 | |
626 } | |
627 | |
628 exit(1); | |
629 } | |
630 | |
631 #else /* ifndef GAMMA */ | |
632 | |
633 /* gamma launcher is simpler in that it doesn't handle VM flavors, data */ | |
634 /* model, LD_LIBRARY_PATH, etc. Assuming everything is set-up correctly */ | |
635 /* all we need to do here is to return correct path names. See also */ | |
636 /* GetJVMPath() and GetApplicationHome(). */ | |
637 | |
638 { char *arch = (char *)GetArch(); /* like sparc or sparcv9 */ | |
639 char *p; | |
640 | |
641 if (!GetJREPath(jrepath, so_jrepath, arch, JNI_FALSE) ) { | |
642 fprintf(stderr, "Error: could not find Java 2 Runtime Environment.\n"); | |
643 exit(2); | |
644 } | |
645 | |
646 if (!GetJVMPath(jrepath, NULL, jvmpath, so_jvmpath, arch )) { | |
647 fprintf(stderr, "Error: no JVM at `%s'.\n", jvmpath); | |
648 exit(4); | |
649 } | |
650 } | |
651 | |
652 #endif /* ifndef GAMMA */ | |
653 } | |
654 | |
655 | |
656 /* | |
657 * On Solaris VM choosing is done by the launcher (java.c). | |
658 */ | |
659 static jboolean | |
660 GetJVMPath(const char *jrepath, const char *jvmtype, | |
661 char *jvmpath, jint jvmpathsize, char * arch) | |
662 { | |
663 struct stat s; | |
664 | |
665 #ifndef GAMMA | |
666 if (strchr(jvmtype, '/')) { | |
667 sprintf(jvmpath, "%s/" JVM_DLL, jvmtype); | |
668 } else { | |
669 sprintf(jvmpath, "%s/lib/%s/%s/" JVM_DLL, jrepath, arch, jvmtype); | |
670 } | |
671 #else | |
672 /* For gamma launcher, JVM is either built-in or in the same directory. */ | |
673 /* Either way we return "<exe_path>/libjvm.so" where <exe_path> is the */ | |
674 /* directory where gamma launcher is located. */ | |
675 | |
676 char *p; | |
677 | |
678 snprintf(jvmpath, jvmpathsize, "%s", GetExecname()); | |
679 p = strrchr(jvmpath, '/'); | |
680 if (p) { | |
681 /* replace executable name with libjvm.so */ | |
682 snprintf(p + 1, jvmpathsize - (p + 1 - jvmpath), "%s", JVM_DLL); | |
683 } else { | |
684 /* this case shouldn't happen */ | |
685 snprintf(jvmpath, jvmpathsize, "%s", JVM_DLL); | |
686 } | |
687 #endif | |
688 | |
689 if (_launcher_debug) | |
690 printf("Does `%s' exist ... ", jvmpath); | |
691 | |
692 if (stat(jvmpath, &s) == 0) { | |
693 if (_launcher_debug) | |
694 printf("yes.\n"); | |
695 return JNI_TRUE; | |
696 } else { | |
697 if (_launcher_debug) | |
698 printf("no.\n"); | |
699 return JNI_FALSE; | |
700 } | |
701 } | |
702 | |
703 /* | |
704 * Find path to JRE based on .exe's location or registry settings. | |
705 */ | |
706 static jboolean | |
707 GetJREPath(char *path, jint pathsize, char * arch, jboolean speculative) | |
708 { | |
709 char libjava[MAXPATHLEN]; | |
710 | |
711 if (GetApplicationHome(path, pathsize)) { | |
712 /* Is JRE co-located with the application? */ | |
713 sprintf(libjava, "%s/lib/%s/" JAVA_DLL, path, arch); | |
714 if (access(libjava, F_OK) == 0) { | |
715 goto found; | |
716 } | |
717 | |
718 /* Does the app ship a private JRE in <apphome>/jre directory? */ | |
719 sprintf(libjava, "%s/jre/lib/%s/" JAVA_DLL, path, arch); | |
720 if (access(libjava, F_OK) == 0) { | |
721 strcat(path, "/jre"); | |
722 goto found; | |
723 } | |
724 } | |
725 | |
726 if (!speculative) | |
727 fprintf(stderr, "Error: could not find " JAVA_DLL "\n"); | |
728 return JNI_FALSE; | |
729 | |
730 found: | |
731 if (_launcher_debug) | |
732 printf("JRE path is %s\n", path); | |
733 return JNI_TRUE; | |
734 } | |
735 | |
736 jboolean | |
737 LoadJavaVM(const char *jvmpath, InvocationFunctions *ifn) | |
738 { | |
739 #ifdef GAMMA | |
740 /* JVM is directly linked with gamma launcher; no dlopen() */ | |
741 ifn->CreateJavaVM = JNI_CreateJavaVM; | |
742 ifn->GetDefaultJavaVMInitArgs = JNI_GetDefaultJavaVMInitArgs; | |
743 return JNI_TRUE; | |
744 #else | |
745 Dl_info dlinfo; | |
746 void *libjvm; | |
747 | |
748 if (_launcher_debug) { | |
749 printf("JVM path is %s\n", jvmpath); | |
750 } | |
751 | |
752 libjvm = dlopen(jvmpath, RTLD_NOW + RTLD_GLOBAL); | |
753 if (libjvm == NULL) { | |
754 #if defined(__sparc) && !defined(_LP64) /* i.e. 32-bit sparc */ | |
755 FILE * fp; | |
756 Elf32_Ehdr elf_head; | |
757 int count; | |
758 int location; | |
759 | |
760 fp = fopen(jvmpath, "r"); | |
761 if(fp == NULL) | |
762 goto error; | |
763 | |
764 /* read in elf header */ | |
765 count = fread((void*)(&elf_head), sizeof(Elf32_Ehdr), 1, fp); | |
766 fclose(fp); | |
767 if(count < 1) | |
768 goto error; | |
769 | |
770 /* | |
771 * Check for running a server vm (compiled with -xarch=v8plus) | |
772 * on a stock v8 processor. In this case, the machine type in | |
773 * the elf header would not be included the architecture list | |
774 * provided by the isalist command, which is turn is gotten from | |
775 * sysinfo. This case cannot occur on 64-bit hardware and thus | |
776 * does not have to be checked for in binaries with an LP64 data | |
777 * model. | |
778 */ | |
779 if(elf_head.e_machine == EM_SPARC32PLUS) { | |
780 char buf[257]; /* recommended buffer size from sysinfo man | |
781 page */ | |
782 long length; | |
783 char* location; | |
784 | |
785 length = sysinfo(SI_ISALIST, buf, 257); | |
786 if(length > 0) { | |
787 location = strstr(buf, "sparcv8plus "); | |
788 if(location == NULL) { | |
789 fprintf(stderr, "SPARC V8 processor detected; Server compiler requires V9 or better.\n"); | |
790 fprintf(stderr, "Use Client compiler on V8 processors.\n"); | |
791 fprintf(stderr, "Could not create the Java virtual machine.\n"); | |
792 return JNI_FALSE; | |
793 } | |
794 } | |
795 } | |
796 #endif | |
797 fprintf(stderr, "dl failure on line %d", __LINE__); | |
798 goto error; | |
799 } | |
800 | |
801 ifn->CreateJavaVM = (CreateJavaVM_t) | |
802 dlsym(libjvm, "JNI_CreateJavaVM"); | |
803 if (ifn->CreateJavaVM == NULL) | |
804 goto error; | |
805 | |
806 ifn->GetDefaultJavaVMInitArgs = (GetDefaultJavaVMInitArgs_t) | |
807 dlsym(libjvm, "JNI_GetDefaultJavaVMInitArgs"); | |
808 if (ifn->GetDefaultJavaVMInitArgs == NULL) | |
809 goto error; | |
810 | |
811 return JNI_TRUE; | |
812 | |
813 error: | |
814 fprintf(stderr, "Error: failed %s, because %s\n", jvmpath, dlerror()); | |
815 return JNI_FALSE; | |
816 #endif /* GAMMA */ | |
817 } | |
818 | |
819 /* | |
820 * Get the path to the file that has the usage message for -X options. | |
821 */ | |
822 void | |
823 GetXUsagePath(char *buf, jint bufsize) | |
824 { | |
825 static const char Xusage_txt[] = "/Xusage.txt"; | |
826 Dl_info dlinfo; | |
827 | |
828 /* we use RTLD_NOW because of problems with ld.so.1 and green threads */ | |
829 dladdr(dlsym(dlopen(JVM_DLL, RTLD_NOW), "JNI_CreateJavaVM"), &dlinfo); | |
830 strncpy(buf, (char *)dlinfo.dli_fname, bufsize - sizeof(Xusage_txt)); | |
831 | |
832 buf[bufsize-1] = '\0'; | |
833 strcpy(strrchr(buf, '/'), Xusage_txt); | |
834 } | |
835 | |
836 /* | |
837 * If app is "/foo/bin/javac", or "/foo/bin/sparcv9/javac" then put | |
838 * "/foo" into buf. | |
839 */ | |
840 jboolean | |
841 GetApplicationHome(char *buf, jint bufsize) | |
842 { | |
843 #ifdef __linux__ | |
844 char *execname = GetExecname(); | |
845 if (execname) { | |
846 strncpy(buf, execname, bufsize-1); | |
847 buf[bufsize-1] = '\0'; | |
848 } else { | |
849 return JNI_FALSE; | |
850 } | |
851 #else | |
852 Dl_info dlinfo; | |
853 | |
854 dladdr((void *)GetApplicationHome, &dlinfo); | |
855 if (realpath(dlinfo.dli_fname, buf) == NULL) { | |
856 fprintf(stderr, "Error: realpath(`%s') failed.\n", dlinfo.dli_fname); | |
857 return JNI_FALSE; | |
858 } | |
859 #endif | |
860 | |
861 #ifdef GAMMA | |
862 { | |
863 /* gamma launcher uses JAVA_HOME environment variable to find JDK/JRE */ | |
864 char* java_home_var = getenv("JAVA_HOME"); | |
865 if (java_home_var == NULL) { | |
866 printf("JAVA_HOME must point to a valid JDK/JRE to run gamma\n"); | |
867 return JNI_FALSE; | |
868 } | |
869 snprintf(buf, bufsize, "%s", java_home_var); | |
870 } | |
871 #else | |
872 if (strrchr(buf, '/') == 0) { | |
873 buf[0] = '\0'; | |
874 return JNI_FALSE; | |
875 } | |
876 *(strrchr(buf, '/')) = '\0'; /* executable file */ | |
877 if (strlen(buf) < 4 || strrchr(buf, '/') == 0) { | |
878 buf[0] = '\0'; | |
879 return JNI_FALSE; | |
880 } | |
881 if (strcmp("/bin", buf + strlen(buf) - 4) != 0) | |
882 *(strrchr(buf, '/')) = '\0'; /* sparcv9 or amd64 */ | |
883 if (strlen(buf) < 4 || strcmp("/bin", buf + strlen(buf) - 4) != 0) { | |
884 buf[0] = '\0'; | |
885 return JNI_FALSE; | |
886 } | |
887 *(strrchr(buf, '/')) = '\0'; /* bin */ | |
888 #endif /* GAMMA */ | |
889 | |
890 return JNI_TRUE; | |
891 } | |
892 | |
893 | |
894 /* | |
895 * Return true if the named program exists | |
896 */ | |
897 static int | |
898 ProgramExists(char *name) | |
899 { | |
900 struct stat sb; | |
901 if (stat(name, &sb) != 0) return 0; | |
902 if (S_ISDIR(sb.st_mode)) return 0; | |
903 return (sb.st_mode & S_IEXEC) != 0; | |
904 } | |
905 | |
906 | |
907 /* | |
908 * Find a command in a directory, returning the path. | |
909 */ | |
910 static char * | |
911 Resolve(char *indir, char *cmd) | |
912 { | |
913 char name[PATH_MAX + 2], *real; | |
914 | |
915 if ((strlen(indir) + strlen(cmd) + 1) > PATH_MAX) return 0; | |
916 sprintf(name, "%s%c%s", indir, FILE_SEPARATOR, cmd); | |
917 if (!ProgramExists(name)) return 0; | |
918 real = MemAlloc(PATH_MAX + 2); | |
919 if (!realpath(name, real)) | |
920 strcpy(real, name); | |
921 return real; | |
922 } | |
923 | |
924 | |
925 /* | |
926 * Find a path for the executable | |
927 */ | |
928 static char * | |
929 FindExecName(char *program) | |
930 { | |
931 char cwdbuf[PATH_MAX+2]; | |
932 char *path; | |
933 char *tmp_path; | |
934 char *f; | |
935 char *result = NULL; | |
936 | |
937 /* absolute path? */ | |
938 if (*program == FILE_SEPARATOR || | |
939 (FILE_SEPARATOR=='\\' && strrchr(program, ':'))) | |
940 return Resolve("", program+1); | |
941 | |
942 /* relative path? */ | |
943 if (strrchr(program, FILE_SEPARATOR) != 0) { | |
944 char buf[PATH_MAX+2]; | |
945 return Resolve(getcwd(cwdbuf, sizeof(cwdbuf)), program); | |
946 } | |
947 | |
948 /* from search path? */ | |
949 path = getenv("PATH"); | |
950 if (!path || !*path) path = "."; | |
951 tmp_path = MemAlloc(strlen(path) + 2); | |
952 strcpy(tmp_path, path); | |
953 | |
954 for (f=tmp_path; *f && result==0; ) { | |
955 char *s = f; | |
956 while (*f && (*f != PATH_SEPARATOR)) ++f; | |
957 if (*f) *f++ = 0; | |
958 if (*s == FILE_SEPARATOR) | |
959 result = Resolve(s, program); | |
960 else { | |
961 /* relative path element */ | |
962 char dir[2*PATH_MAX]; | |
963 sprintf(dir, "%s%c%s", getcwd(cwdbuf, sizeof(cwdbuf)), | |
964 FILE_SEPARATOR, s); | |
965 result = Resolve(dir, program); | |
966 } | |
967 if (result != 0) break; | |
968 } | |
969 | |
970 free(tmp_path); | |
971 return result; | |
972 } | |
973 | |
974 | |
975 /* Store the name of the executable once computed */ | |
976 static char *execname = NULL; | |
977 | |
978 /* | |
979 * Compute the name of the executable | |
980 * | |
981 * In order to re-exec securely we need the absolute path of the | |
982 * executable. On Solaris getexecname(3c) may not return an absolute | |
983 * path so we use dladdr to get the filename of the executable and | |
984 * then use realpath to derive an absolute path. From Solaris 9 | |
985 * onwards the filename returned in DL_info structure from dladdr is | |
986 * an absolute pathname so technically realpath isn't required. | |
987 * On Linux we read the executable name from /proc/self/exe. | |
988 * As a fallback, and for platforms other than Solaris and Linux, | |
989 * we use FindExecName to compute the executable name. | |
990 */ | |
991 static char * | |
992 SetExecname(char **argv) | |
993 { | |
994 char* exec_path = NULL; | |
995 | |
996 if (execname != NULL) /* Already determined */ | |
997 return (execname); | |
998 | |
999 #if defined(__sun) | |
1000 { | |
1001 Dl_info dlinfo; | |
1002 if (dladdr((void*)&SetExecname, &dlinfo)) { | |
1003 char *resolved = (char*)MemAlloc(PATH_MAX+1); | |
1004 if (resolved != NULL) { | |
1005 exec_path = realpath(dlinfo.dli_fname, resolved); | |
1006 if (exec_path == NULL) { | |
1007 free(resolved); | |
1008 } | |
1009 } | |
1010 } | |
1011 } | |
1012 #elif defined(__linux__) | |
1013 { | |
1014 const char* self = "/proc/self/exe"; | |
1015 char buf[PATH_MAX+1]; | |
1016 int len = readlink(self, buf, PATH_MAX); | |
1017 if (len >= 0) { | |
1018 buf[len] = '\0'; /* readlink doesn't nul terminate */ | |
1019 exec_path = strdup(buf); | |
1020 } | |
1021 } | |
1022 #else /* !__sun && !__linux */ | |
1023 { | |
1024 /* Not implemented */ | |
1025 } | |
1026 #endif | |
1027 | |
1028 if (exec_path == NULL) { | |
1029 exec_path = FindExecName(argv[0]); | |
1030 } | |
1031 execname = exec_path; | |
1032 return exec_path; | |
1033 } | |
1034 | |
1035 /* | |
1036 * Return the name of the executable. Used in java_md.c to find the JRE area. | |
1037 */ | |
1038 static char * | |
1039 GetExecname() { | |
1040 return execname; | |
1041 } | |
1042 | |
1043 void ReportErrorMessage(char * message, jboolean always) { | |
1044 if (always) { | |
1045 fprintf(stderr, "%s\n", message); | |
1046 } | |
1047 } | |
1048 | |
1049 void ReportErrorMessage2(char * format, char * string, jboolean always) { | |
1050 if (always) { | |
1051 fprintf(stderr, format, string); | |
1052 fprintf(stderr, "\n"); | |
1053 } | |
1054 } | |
1055 | |
1056 void ReportExceptionDescription(JNIEnv * env) { | |
1057 (*env)->ExceptionDescribe(env); | |
1058 } | |
1059 | |
1060 /* | |
1061 * Return JNI_TRUE for an option string that has no effect but should | |
1062 * _not_ be passed on to the vm; return JNI_FALSE otherwise. On | |
1063 * Solaris SPARC, this screening needs to be done if: | |
1064 * 1) LD_LIBRARY_PATH does _not_ need to be reset and | |
1065 * 2) -d32 or -d64 is passed to a binary with a matching data model | |
1066 * (the exec in SetLibraryPath removes -d<n> options and points the | |
1067 * exec to the proper binary). When this exec is not done, these options | |
1068 * would end up getting passed onto the vm. | |
1069 */ | |
1070 jboolean RemovableMachineDependentOption(char * option) { | |
1071 /* | |
1072 * Unconditionally remove both -d32 and -d64 options since only | |
1073 * the last such options has an effect; e.g. | |
1074 * java -d32 -d64 -d32 -version | |
1075 * is equivalent to | |
1076 * java -d32 -version | |
1077 */ | |
1078 | |
1079 if( (strcmp(option, "-d32") == 0 ) || | |
1080 (strcmp(option, "-d64") == 0 )) | |
1081 return JNI_TRUE; | |
1082 else | |
1083 return JNI_FALSE; | |
1084 } | |
1085 | |
1086 void PrintMachineDependentOptions() { | |
1087 fprintf(stdout, | |
1088 " -d32 use a 32-bit data model if available\n" | |
1089 "\n" | |
1090 " -d64 use a 64-bit data model if available\n"); | |
1091 return; | |
1092 } | |
1093 | |
1094 #ifndef GAMMA /* gamma launcher does not have ergonomics */ | |
1095 | |
1096 /* | |
1097 * The following methods (down to ServerClassMachine()) answer | |
1098 * the question about whether a machine is a "server-class" | |
1099 * machine. A server-class machine is loosely defined as one | |
1100 * with 2 or more processors and 2 gigabytes or more physical | |
1101 * memory. The definition of a processor is a physical package, | |
1102 * not a hyperthreaded chip masquerading as a multi-processor. | |
1103 * The definition of memory is also somewhat fuzzy, since x86 | |
1104 * machines seem not to report all the memory in their DIMMs, we | |
1105 * think because of memory mapping of graphics cards, etc. | |
1106 * | |
1107 * This code is somewhat more confused with #ifdef's than we'd | |
1108 * like because this file is used by both Solaris and Linux | |
1109 * platforms, and so needs to be parameterized for SPARC and | |
1110 * i586 hardware. The other Linux platforms (amd64 and ia64) | |
1111 * don't even ask this question, because they only come with | |
1112 * server JVMs. */ | |
1113 | |
1114 # define KB (1024UL) | |
1115 # define MB (1024UL * KB) | |
1116 # define GB (1024UL * MB) | |
1117 | |
1118 /* Compute physical memory by asking the OS */ | |
1119 uint64_t | |
1120 physical_memory(void) { | |
1121 const uint64_t pages = (uint64_t) sysconf(_SC_PHYS_PAGES); | |
1122 const uint64_t page_size = (uint64_t) sysconf(_SC_PAGESIZE); | |
1123 const uint64_t result = pages * page_size; | |
1124 # define UINT64_FORMAT "%" PRIu64 | |
1125 | |
1126 if (_launcher_debug) { | |
1127 printf("pages: " UINT64_FORMAT | |
1128 " page_size: " UINT64_FORMAT | |
1129 " physical memory: " UINT64_FORMAT " (%.3fGB)\n", | |
1130 pages, page_size, result, result / (double) GB); | |
1131 } | |
1132 return result; | |
1133 } | |
1134 | |
1135 #if defined(__sun) && defined(__sparc) | |
1136 | |
1137 /* Methods for solaris-sparc: these are easy. */ | |
1138 | |
1139 /* Ask the OS how many processors there are. */ | |
1140 unsigned long | |
1141 physical_processors(void) { | |
1142 const unsigned long sys_processors = sysconf(_SC_NPROCESSORS_CONF); | |
1143 | |
1144 if (_launcher_debug) { | |
1145 printf("sysconf(_SC_NPROCESSORS_CONF): %lu\n", sys_processors); | |
1146 } | |
1147 return sys_processors; | |
1148 } | |
1149 | |
1150 /* The solaris-sparc version of the "server-class" predicate. */ | |
1151 jboolean | |
1152 solaris_sparc_ServerClassMachine(void) { | |
1153 jboolean result = JNI_FALSE; | |
1154 /* How big is a server class machine? */ | |
1155 const unsigned long server_processors = 2UL; | |
1156 const uint64_t server_memory = 2UL * GB; | |
1157 const uint64_t actual_memory = physical_memory(); | |
1158 | |
1159 /* Is this a server class machine? */ | |
1160 if (actual_memory >= server_memory) { | |
1161 const unsigned long actual_processors = physical_processors(); | |
1162 if (actual_processors >= server_processors) { | |
1163 result = JNI_TRUE; | |
1164 } | |
1165 } | |
1166 if (_launcher_debug) { | |
1167 printf("solaris_" ARCH "_ServerClassMachine: %s\n", | |
1168 (result == JNI_TRUE ? "JNI_TRUE" : "JNI_FALSE")); | |
1169 } | |
1170 return result; | |
1171 } | |
1172 | |
1173 #endif /* __sun && __sparc */ | |
1174 | |
1175 #if defined(__sun) && defined(i586) | |
1176 | |
1177 /* | |
1178 * A utility method for asking the CPU about itself. | |
1179 * There's a corresponding version of linux-i586 | |
1180 * because the compilers are different. | |
1181 */ | |
1182 void | |
1183 get_cpuid(uint32_t arg, | |
1184 uint32_t* eaxp, | |
1185 uint32_t* ebxp, | |
1186 uint32_t* ecxp, | |
1187 uint32_t* edxp) { | |
1188 #ifdef _LP64 | |
1189 asm( | |
1190 /* rbx is a callee-saved register */ | |
1191 " movq %rbx, %r11 \n" | |
1192 /* rdx and rcx are 3rd and 4th argument registers */ | |
1193 " movq %rdx, %r10 \n" | |
1194 " movq %rcx, %r9 \n" | |
1195 " movl %edi, %eax \n" | |
1196 " cpuid \n" | |
1197 " movl %eax, (%rsi)\n" | |
1198 " movl %ebx, (%r10)\n" | |
1199 " movl %ecx, (%r9) \n" | |
1200 " movl %edx, (%r8) \n" | |
1201 /* Restore rbx */ | |
1202 " movq %r11, %rbx"); | |
1203 #else | |
1204 /* EBX is a callee-saved register */ | |
1205 asm(" pushl %ebx"); | |
1206 /* Need ESI for storing through arguments */ | |
1207 asm(" pushl %esi"); | |
1208 asm(" movl 8(%ebp), %eax \n" | |
1209 " cpuid \n" | |
1210 " movl 12(%ebp), %esi \n" | |
1211 " movl %eax, (%esi) \n" | |
1212 " movl 16(%ebp), %esi \n" | |
1213 " movl %ebx, (%esi) \n" | |
1214 " movl 20(%ebp), %esi \n" | |
1215 " movl %ecx, (%esi) \n" | |
1216 " movl 24(%ebp), %esi \n" | |
1217 " movl %edx, (%esi) "); | |
1218 /* Restore ESI and EBX */ | |
1219 asm(" popl %esi"); | |
1220 /* Restore EBX */ | |
1221 asm(" popl %ebx"); | |
1222 #endif | |
1223 } | |
1224 | |
1225 #endif /* __sun && i586 */ | |
1226 | |
1227 #if defined(__linux__) && defined(i586) | |
1228 | |
1229 /* | |
1230 * A utility method for asking the CPU about itself. | |
1231 * There's a corresponding version of solaris-i586 | |
1232 * because the compilers are different. | |
1233 */ | |
1234 void | |
1235 get_cpuid(uint32_t arg, | |
1236 uint32_t* eaxp, | |
1237 uint32_t* ebxp, | |
1238 uint32_t* ecxp, | |
1239 uint32_t* edxp) { | |
1240 #ifdef _LP64 | |
1241 __asm__ volatile (/* Instructions */ | |
1242 " movl %4, %%eax \n" | |
1243 " cpuid \n" | |
1244 " movl %%eax, (%0)\n" | |
1245 " movl %%ebx, (%1)\n" | |
1246 " movl %%ecx, (%2)\n" | |
1247 " movl %%edx, (%3)\n" | |
1248 : /* Outputs */ | |
1249 : /* Inputs */ | |
1250 "r" (eaxp), | |
1251 "r" (ebxp), | |
1252 "r" (ecxp), | |
1253 "r" (edxp), | |
1254 "r" (arg) | |
1255 : /* Clobbers */ | |
1256 "%rax", "%rbx", "%rcx", "%rdx", "memory" | |
1257 ); | |
1258 #else | |
1259 uint32_t value_of_eax = 0; | |
1260 uint32_t value_of_ebx = 0; | |
1261 uint32_t value_of_ecx = 0; | |
1262 uint32_t value_of_edx = 0; | |
1263 __asm__ volatile (/* Instructions */ | |
1264 /* ebx is callee-save, so push it */ | |
1265 /* even though it's in the clobbers section */ | |
1266 " pushl %%ebx \n" | |
1267 " movl %4, %%eax \n" | |
1268 " cpuid \n" | |
1269 " movl %%eax, %0 \n" | |
1270 " movl %%ebx, %1 \n" | |
1271 " movl %%ecx, %2 \n" | |
1272 " movl %%edx, %3 \n" | |
1273 /* restore ebx */ | |
1274 " popl %%ebx \n" | |
1275 | |
1276 : /* Outputs */ | |
1277 "=m" (value_of_eax), | |
1278 "=m" (value_of_ebx), | |
1279 "=m" (value_of_ecx), | |
1280 "=m" (value_of_edx) | |
1281 : /* Inputs */ | |
1282 "m" (arg) | |
1283 : /* Clobbers */ | |
1284 "%eax", "%ebx", "%ecx", "%edx" | |
1285 ); | |
1286 *eaxp = value_of_eax; | |
1287 *ebxp = value_of_ebx; | |
1288 *ecxp = value_of_ecx; | |
1289 *edxp = value_of_edx; | |
1290 #endif | |
1291 } | |
1292 | |
1293 #endif /* __linux__ && i586 */ | |
1294 | |
1295 #ifdef i586 | |
1296 /* | |
1297 * Routines shared by solaris-i586 and linux-i586. | |
1298 */ | |
1299 | |
1300 enum HyperThreadingSupport_enum { | |
1301 hts_supported = 1, | |
1302 hts_too_soon_to_tell = 0, | |
1303 hts_not_supported = -1, | |
1304 hts_not_pentium4 = -2, | |
1305 hts_not_intel = -3 | |
1306 }; | |
1307 typedef enum HyperThreadingSupport_enum HyperThreadingSupport; | |
1308 | |
1309 /* Determine if hyperthreading is supported */ | |
1310 HyperThreadingSupport | |
1311 hyperthreading_support(void) { | |
1312 HyperThreadingSupport result = hts_too_soon_to_tell; | |
1313 /* Bits 11 through 8 is family processor id */ | |
1314 # define FAMILY_ID_SHIFT 8 | |
1315 # define FAMILY_ID_MASK 0xf | |
1316 /* Bits 23 through 20 is extended family processor id */ | |
1317 # define EXT_FAMILY_ID_SHIFT 20 | |
1318 # define EXT_FAMILY_ID_MASK 0xf | |
1319 /* Pentium 4 family processor id */ | |
1320 # define PENTIUM4_FAMILY_ID 0xf | |
1321 /* Bit 28 indicates Hyper-Threading Technology support */ | |
1322 # define HT_BIT_SHIFT 28 | |
1323 # define HT_BIT_MASK 1 | |
1324 uint32_t vendor_id[3] = { 0U, 0U, 0U }; | |
1325 uint32_t value_of_eax = 0U; | |
1326 uint32_t value_of_edx = 0U; | |
1327 uint32_t dummy = 0U; | |
1328 | |
1329 /* Yes, this is supposed to be [0], [2], [1] */ | |
1330 get_cpuid(0, &dummy, &vendor_id[0], &vendor_id[2], &vendor_id[1]); | |
1331 if (_launcher_debug) { | |
1332 printf("vendor: %c %c %c %c %c %c %c %c %c %c %c %c \n", | |
1333 ((vendor_id[0] >> 0) & 0xff), | |
1334 ((vendor_id[0] >> 8) & 0xff), | |
1335 ((vendor_id[0] >> 16) & 0xff), | |
1336 ((vendor_id[0] >> 24) & 0xff), | |
1337 ((vendor_id[1] >> 0) & 0xff), | |
1338 ((vendor_id[1] >> 8) & 0xff), | |
1339 ((vendor_id[1] >> 16) & 0xff), | |
1340 ((vendor_id[1] >> 24) & 0xff), | |
1341 ((vendor_id[2] >> 0) & 0xff), | |
1342 ((vendor_id[2] >> 8) & 0xff), | |
1343 ((vendor_id[2] >> 16) & 0xff), | |
1344 ((vendor_id[2] >> 24) & 0xff)); | |
1345 } | |
1346 get_cpuid(1, &value_of_eax, &dummy, &dummy, &value_of_edx); | |
1347 if (_launcher_debug) { | |
1348 printf("value_of_eax: 0x%x value_of_edx: 0x%x\n", | |
1349 value_of_eax, value_of_edx); | |
1350 } | |
1351 if ((((value_of_eax >> FAMILY_ID_SHIFT) & FAMILY_ID_MASK) == PENTIUM4_FAMILY_ID) || | |
1352 (((value_of_eax >> EXT_FAMILY_ID_SHIFT) & EXT_FAMILY_ID_MASK) != 0)) { | |
1353 if ((((vendor_id[0] >> 0) & 0xff) == 'G') && | |
1354 (((vendor_id[0] >> 8) & 0xff) == 'e') && | |
1355 (((vendor_id[0] >> 16) & 0xff) == 'n') && | |
1356 (((vendor_id[0] >> 24) & 0xff) == 'u') && | |
1357 (((vendor_id[1] >> 0) & 0xff) == 'i') && | |
1358 (((vendor_id[1] >> 8) & 0xff) == 'n') && | |
1359 (((vendor_id[1] >> 16) & 0xff) == 'e') && | |
1360 (((vendor_id[1] >> 24) & 0xff) == 'I') && | |
1361 (((vendor_id[2] >> 0) & 0xff) == 'n') && | |
1362 (((vendor_id[2] >> 8) & 0xff) == 't') && | |
1363 (((vendor_id[2] >> 16) & 0xff) == 'e') && | |
1364 (((vendor_id[2] >> 24) & 0xff) == 'l')) { | |
1365 if (((value_of_edx >> HT_BIT_SHIFT) & HT_BIT_MASK) == HT_BIT_MASK) { | |
1366 if (_launcher_debug) { | |
1367 printf("Hyperthreading supported\n"); | |
1368 } | |
1369 result = hts_supported; | |
1370 } else { | |
1371 if (_launcher_debug) { | |
1372 printf("Hyperthreading not supported\n"); | |
1373 } | |
1374 result = hts_not_supported; | |
1375 } | |
1376 } else { | |
1377 if (_launcher_debug) { | |
1378 printf("Not GenuineIntel\n"); | |
1379 } | |
1380 result = hts_not_intel; | |
1381 } | |
1382 } else { | |
1383 if (_launcher_debug) { | |
1384 printf("not Pentium 4 or extended\n"); | |
1385 } | |
1386 result = hts_not_pentium4; | |
1387 } | |
1388 return result; | |
1389 } | |
1390 | |
1391 /* Determine how many logical processors there are per CPU */ | |
1392 unsigned int | |
1393 logical_processors_per_package(void) { | |
1394 /* | |
1395 * After CPUID with EAX==1, register EBX bits 23 through 16 | |
1396 * indicate the number of logical processors per package | |
1397 */ | |
1398 # define NUM_LOGICAL_SHIFT 16 | |
1399 # define NUM_LOGICAL_MASK 0xff | |
1400 unsigned int result = 1U; | |
1401 const HyperThreadingSupport hyperthreading = hyperthreading_support(); | |
1402 | |
1403 if (hyperthreading == hts_supported) { | |
1404 uint32_t value_of_ebx = 0U; | |
1405 uint32_t dummy = 0U; | |
1406 | |
1407 get_cpuid(1, &dummy, &value_of_ebx, &dummy, &dummy); | |
1408 result = (value_of_ebx >> NUM_LOGICAL_SHIFT) & NUM_LOGICAL_MASK; | |
1409 if (_launcher_debug) { | |
1410 printf("logical processors per package: %u\n", result); | |
1411 } | |
1412 } | |
1413 return result; | |
1414 } | |
1415 | |
1416 /* Compute the number of physical processors, not logical processors */ | |
1417 unsigned long | |
1418 physical_processors(void) { | |
1419 const long sys_processors = sysconf(_SC_NPROCESSORS_CONF); | |
1420 unsigned long result = sys_processors; | |
1421 | |
1422 if (_launcher_debug) { | |
1423 printf("sysconf(_SC_NPROCESSORS_CONF): %lu\n", sys_processors); | |
1424 } | |
1425 if (sys_processors > 1) { | |
1426 unsigned int logical_processors = logical_processors_per_package(); | |
1427 if (logical_processors > 1) { | |
1428 result = (unsigned long) sys_processors / logical_processors; | |
1429 } | |
1430 } | |
1431 if (_launcher_debug) { | |
1432 printf("physical processors: %lu\n", result); | |
1433 } | |
1434 return result; | |
1435 } | |
1436 | |
1437 #endif /* i586 */ | |
1438 | |
1439 #if defined(__sun) && defined(i586) | |
1440 | |
1441 /* The definition of a server-class machine for solaris-i586/amd64 */ | |
1442 jboolean | |
1443 solaris_i586_ServerClassMachine(void) { | |
1444 jboolean result = JNI_FALSE; | |
1445 /* How big is a server class machine? */ | |
1446 const unsigned long server_processors = 2UL; | |
1447 const uint64_t server_memory = 2UL * GB; | |
1448 /* | |
1449 * We seem not to get our full complement of memory. | |
1450 * We allow some part (1/8?) of the memory to be "missing", | |
1451 * based on the sizes of DIMMs, and maybe graphics cards. | |
1452 */ | |
1453 const uint64_t missing_memory = 256UL * MB; | |
1454 const uint64_t actual_memory = physical_memory(); | |
1455 | |
1456 /* Is this a server class machine? */ | |
1457 if (actual_memory >= (server_memory - missing_memory)) { | |
1458 const unsigned long actual_processors = physical_processors(); | |
1459 if (actual_processors >= server_processors) { | |
1460 result = JNI_TRUE; | |
1461 } | |
1462 } | |
1463 if (_launcher_debug) { | |
1464 printf("solaris_" ARCH "_ServerClassMachine: %s\n", | |
1465 (result == JNI_TRUE ? "true" : "false")); | |
1466 } | |
1467 return result; | |
1468 } | |
1469 | |
1470 #endif /* __sun && i586 */ | |
1471 | |
1472 #if defined(__linux__) && defined(i586) | |
1473 | |
1474 /* The definition of a server-class machine for linux-i586 */ | |
1475 jboolean | |
1476 linux_i586_ServerClassMachine(void) { | |
1477 jboolean result = JNI_FALSE; | |
1478 /* How big is a server class machine? */ | |
1479 const unsigned long server_processors = 2UL; | |
1480 const uint64_t server_memory = 2UL * GB; | |
1481 /* | |
1482 * We seem not to get our full complement of memory. | |
1483 * We allow some part (1/8?) of the memory to be "missing", | |
1484 * based on the sizes of DIMMs, and maybe graphics cards. | |
1485 */ | |
1486 const uint64_t missing_memory = 256UL * MB; | |
1487 const uint64_t actual_memory = physical_memory(); | |
1488 | |
1489 /* Is this a server class machine? */ | |
1490 if (actual_memory >= (server_memory - missing_memory)) { | |
1491 const unsigned long actual_processors = physical_processors(); | |
1492 if (actual_processors >= server_processors) { | |
1493 result = JNI_TRUE; | |
1494 } | |
1495 } | |
1496 if (_launcher_debug) { | |
1497 printf("linux_" ARCH "_ServerClassMachine: %s\n", | |
1498 (result == JNI_TRUE ? "true" : "false")); | |
1499 } | |
1500 return result; | |
1501 } | |
1502 | |
1503 #endif /* __linux__ && i586 */ | |
1504 | |
1505 /* Dispatch to the platform-specific definition of "server-class" */ | |
1506 jboolean | |
1507 ServerClassMachine(void) { | |
1508 jboolean result = JNI_FALSE; | |
1509 #if defined(__sun) && defined(__sparc) | |
1510 result = solaris_sparc_ServerClassMachine(); | |
1511 #elif defined(__sun) && defined(i586) | |
1512 result = solaris_i586_ServerClassMachine(); | |
1513 #elif defined(__linux__) && defined(i586) | |
1514 result = linux_i586_ServerClassMachine(); | |
1515 #else | |
1516 if (_launcher_debug) { | |
1517 printf("ServerClassMachine: returns default value of %s\n", | |
1518 (result == JNI_TRUE ? "true" : "false")); | |
1519 } | |
1520 #endif | |
1521 return result; | |
1522 } | |
1523 | |
1524 #endif /* ifndef GAMMA */ | |
1525 | |
1526 #ifndef GAMMA /* gamma launcher does not choose JDK/JRE/JVM */ | |
1527 | |
1528 /* | |
1529 * Since using the file system as a registry is a bit risky, perform | |
1530 * additional sanity checks on the identified directory to validate | |
1531 * it as a valid jre/sdk. | |
1532 * | |
1533 * Return 0 if the tests fail; otherwise return non-zero (true). | |
1534 * | |
1535 * Note that checking for anything more than the existence of an | |
1536 * executable object at bin/java relative to the path being checked | |
1537 * will break the regression tests. | |
1538 */ | |
1539 static int | |
1540 CheckSanity(char *path, char *dir) | |
1541 { | |
1542 char buffer[PATH_MAX]; | |
1543 | |
1544 if (strlen(path) + strlen(dir) + 11 > PATH_MAX) | |
1545 return (0); /* Silently reject "impossibly" long paths */ | |
1546 | |
1547 (void)strcat(strcat(strcat(strcpy(buffer, path), "/"), dir), "/bin/java"); | |
1548 return ((access(buffer, X_OK) == 0) ? 1 : 0); | |
1549 } | |
1550 | |
1551 /* | |
1552 * Determine if there is an acceptable JRE in the directory dirname. | |
1553 * Upon locating the "best" one, return a fully qualified path to | |
1554 * it. "Best" is defined as the most advanced JRE meeting the | |
1555 * constraints contained in the manifest_info. If no JRE in this | |
1556 * directory meets the constraints, return NULL. | |
1557 * | |
1558 * Note that we don't check for errors in reading the directory | |
1559 * (which would be done by checking errno). This is because it | |
1560 * doesn't matter if we get an error reading the directory, or | |
1561 * we just don't find anything interesting in the directory. We | |
1562 * just return NULL in either case. | |
1563 * | |
1564 * The historical names of j2sdk and j2re were changed to jdk and | |
1565 * jre respecively as part of the 1.5 rebranding effort. Since the | |
1566 * former names are legacy on Linux, they must be recognized for | |
1567 * all time. Fortunately, this is a minor cost. | |
1568 */ | |
1569 static char | |
1570 *ProcessDir(manifest_info *info, char *dirname) | |
1571 { | |
1572 DIR *dirp; | |
1573 struct dirent *dp; | |
1574 char *best = NULL; | |
1575 int offset; | |
1576 int best_offset = 0; | |
1577 char *ret_str = NULL; | |
1578 char buffer[PATH_MAX]; | |
1579 | |
1580 if ((dirp = opendir(dirname)) == NULL) | |
1581 return (NULL); | |
1582 | |
1583 do { | |
1584 if ((dp = readdir(dirp)) != NULL) { | |
1585 offset = 0; | |
1586 if ((strncmp(dp->d_name, "jre", 3) == 0) || | |
1587 (strncmp(dp->d_name, "jdk", 3) == 0)) | |
1588 offset = 3; | |
1589 else if (strncmp(dp->d_name, "j2re", 4) == 0) | |
1590 offset = 4; | |
1591 else if (strncmp(dp->d_name, "j2sdk", 5) == 0) | |
1592 offset = 5; | |
1593 if (offset > 0) { | |
1594 if ((acceptable_release(dp->d_name + offset, | |
1595 info->jre_version)) && CheckSanity(dirname, dp->d_name)) | |
1596 if ((best == NULL) || (exact_version_id( | |
1597 dp->d_name + offset, best + best_offset) > 0)) { | |
1598 if (best != NULL) | |
1599 free(best); | |
1600 best = strdup(dp->d_name); | |
1601 best_offset = offset; | |
1602 } | |
1603 } | |
1604 } | |
1605 } while (dp != NULL); | |
1606 (void) closedir(dirp); | |
1607 if (best == NULL) | |
1608 return (NULL); | |
1609 else { | |
1610 ret_str = MemAlloc(strlen(dirname) + strlen(best) + 2); | |
1611 ret_str = strcat(strcat(strcpy(ret_str, dirname), "/"), best); | |
1612 free(best); | |
1613 return (ret_str); | |
1614 } | |
1615 } | |
1616 | |
1617 /* | |
1618 * This is the global entry point. It examines the host for the optimal | |
1619 * JRE to be used by scanning a set of directories. The set of directories | |
1620 * is platform dependent and can be overridden by the environment | |
1621 * variable JAVA_VERSION_PATH. | |
1622 * | |
1623 * This routine itself simply determines the set of appropriate | |
1624 * directories before passing control onto ProcessDir(). | |
1625 */ | |
1626 char* | |
1627 LocateJRE(manifest_info* info) | |
1628 { | |
1629 char *path; | |
1630 char *home; | |
1631 char *target = NULL; | |
1632 char *dp; | |
1633 char *cp; | |
1634 | |
1635 /* | |
1636 * Start by getting JAVA_VERSION_PATH | |
1637 */ | |
1638 if (info->jre_restrict_search) | |
1639 path = strdup(system_dir); | |
1640 else if ((path = getenv("JAVA_VERSION_PATH")) != NULL) | |
1641 path = strdup(path); | |
1642 else | |
1643 if ((home = getenv("HOME")) != NULL) { | |
1644 path = (char *)MemAlloc(strlen(home) + 13); | |
1645 path = strcat(strcat(strcat(strcpy(path, home), | |
1646 user_dir), ":"), system_dir); | |
1647 } else | |
1648 path = strdup(system_dir); | |
1649 | |
1650 /* | |
1651 * Step through each directory on the path. Terminate the scan with | |
1652 * the first directory with an acceptable JRE. | |
1653 */ | |
1654 cp = dp = path; | |
1655 while (dp != NULL) { | |
1656 cp = strchr(dp, (int)':'); | |
1657 if (cp != NULL) | |
1658 *cp = (char)NULL; | |
1659 if ((target = ProcessDir(info, dp)) != NULL) | |
1660 break; | |
1661 dp = cp; | |
1662 if (dp != NULL) | |
1663 dp++; | |
1664 } | |
1665 free(path); | |
1666 return (target); | |
1667 } | |
1668 | |
1669 /* | |
1670 * Given a path to a jre to execute, this routine checks if this process | |
1671 * is indeed that jre. If not, it exec's that jre. | |
1672 * | |
1673 * We want to actually check the paths rather than just the version string | |
1674 * built into the executable, so that given version specification (and | |
1675 * JAVA_VERSION_PATH) will yield the exact same Java environment, regardless | |
1676 * of the version of the arbitrary launcher we start with. | |
1677 */ | |
1678 void | |
1679 ExecJRE(char *jre, char **argv) | |
1680 { | |
1681 char wanted[PATH_MAX]; | |
1682 char *execname; | |
1683 char *progname; | |
1684 | |
1685 /* | |
1686 * Resolve the real path to the directory containing the selected JRE. | |
1687 */ | |
1688 if (realpath(jre, wanted) == NULL) { | |
1689 fprintf(stderr, "Unable to resolve %s\n", jre); | |
1690 exit(1); | |
1691 } | |
1692 | |
1693 /* | |
1694 * Resolve the real path to the currently running launcher. | |
1695 */ | |
1696 execname = SetExecname(argv); | |
1697 if (execname == NULL) { | |
1698 fprintf(stderr, "Unable to resolve current executable\n"); | |
1699 exit(1); | |
1700 } | |
1701 | |
1702 /* | |
1703 * If the path to the selected JRE directory is a match to the initial | |
1704 * portion of the path to the currently executing JRE, we have a winner! | |
1705 * If so, just return. | |
1706 */ | |
1707 if (strncmp(wanted, execname, strlen(wanted)) == 0) | |
1708 return; /* I am the droid you were looking for */ | |
1709 | |
1710 /* | |
1711 * If this isn't the selected version, exec the selected version. | |
1712 */ | |
1713 #ifdef JAVA_ARGS /* javac, jar and friends. */ | |
1714 progname = "java"; | |
1715 #else /* java, oldjava, javaw and friends */ | |
1716 #ifdef PROGNAME | |
1717 progname = PROGNAME; | |
1718 #else | |
1719 progname = *argv; | |
1720 if ((s = strrchr(progname, FILE_SEPARATOR)) != 0) { | |
1721 progname = s + 1; | |
1722 } | |
1723 #endif /* PROGNAME */ | |
1724 #endif /* JAVA_ARGS */ | |
1725 | |
1726 /* | |
1727 * This should never happen (because of the selection code in SelectJRE), | |
1728 * but check for "impossibly" long path names just because buffer overruns | |
1729 * can be so deadly. | |
1730 */ | |
1731 if (strlen(wanted) + strlen(progname) + 6 > PATH_MAX) { | |
1732 fprintf(stderr, "Path length exceeds maximum length (PATH_MAX)\n"); | |
1733 exit(1); | |
1734 } | |
1735 | |
1736 /* | |
1737 * Construct the path and exec it. | |
1738 */ | |
1739 (void)strcat(strcat(wanted, "/bin/"), progname); | |
1740 argv[0] = progname; | |
1741 if (_launcher_debug) { | |
1742 int i; | |
1743 printf("execv(\"%s\"", wanted); | |
1744 for (i = 0; argv[i] != NULL; i++) | |
1745 printf(", \"%s\"", argv[i]); | |
1746 printf(")\n"); | |
1747 } | |
1748 execv(wanted, argv); | |
1749 fprintf(stderr, "Exec of %s failed\n", wanted); | |
1750 exit(1); | |
1751 } | |
1752 | |
1753 #endif /* ifndef GAMMA */ | |
1754 | |
1755 /* | |
1756 * "Borrowed" from Solaris 10 where the unsetenv() function is being added | |
1757 * to libc thanks to SUSv3 (Standard Unix Specification, version 3). As | |
1758 * such, in the fullness of time this will appear in libc on all relevant | |
1759 * Solaris/Linux platforms and maybe even the Windows platform. At that | |
1760 * time, this stub can be removed. | |
1761 * | |
1762 * This implementation removes the environment locking for multithreaded | |
1763 * applications. (We don't have access to these mutexes within libc and | |
1764 * the launcher isn't multithreaded.) Note that what remains is platform | |
1765 * independent, because it only relies on attributes that a POSIX environment | |
1766 * defines. | |
1767 * | |
1768 * Returns 0 on success, -1 on failure. | |
1769 * | |
1770 * Also removed was the setting of errno. The only value of errno set | |
1771 * was EINVAL ("Invalid Argument"). | |
1772 */ | |
1773 | |
1774 /* | |
1775 * s1(environ) is name=value | |
1776 * s2(name) is name(not the form of name=value). | |
1777 * if names match, return value of 1, else return 0 | |
1778 */ | |
1779 static int | |
1780 match_noeq(const char *s1, const char *s2) | |
1781 { | |
1782 while (*s1 == *s2++) { | |
1783 if (*s1++ == '=') | |
1784 return (1); | |
1785 } | |
1786 if (*s1 == '=' && s2[-1] == '\0') | |
1787 return (1); | |
1788 return (0); | |
1789 } | |
1790 | |
1791 /* | |
1792 * added for SUSv3 standard | |
1793 * | |
1794 * Delete entry from environ. | |
1795 * Do not free() memory! Other threads may be using it. | |
1796 * Keep it around forever. | |
1797 */ | |
1798 static int | |
1799 borrowed_unsetenv(const char *name) | |
1800 { | |
1801 long idx; /* index into environ */ | |
1802 | |
1803 if (name == NULL || *name == '\0' || | |
1804 strchr(name, '=') != NULL) { | |
1805 return (-1); | |
1806 } | |
1807 | |
1808 for (idx = 0; environ[idx] != NULL; idx++) { | |
1809 if (match_noeq(environ[idx], name)) | |
1810 break; | |
1811 } | |
1812 if (environ[idx] == NULL) { | |
1813 /* name not found but still a success */ | |
1814 return (0); | |
1815 } | |
1816 /* squeeze up one entry */ | |
1817 do { | |
1818 environ[idx] = environ[idx+1]; | |
1819 } while (environ[++idx] != NULL); | |
1820 | |
1821 return (0); | |
1822 } | |
1823 /* --- End of "borrowed" code --- */ | |
1824 | |
1825 /* | |
1826 * Wrapper for unsetenv() function. | |
1827 */ | |
1828 int | |
1829 UnsetEnv(char *name) | |
1830 { | |
1831 return(borrowed_unsetenv(name)); | |
1832 } | |
388 | 1833 /* |
1834 * The implementation for finding classes from the bootstrap | |
1835 * class loader, refer to java.h | |
1836 */ | |
1837 static FindClassFromBootLoader_t *findBootClass = NULL; | |
1838 | |
1839 jclass | |
1840 FindBootStrapClass(JNIEnv *env, const char* classname) | |
1841 { | |
1842 if (findBootClass == NULL) { | |
1843 findBootClass = (FindClassFromBootLoader_t *)dlsym(RTLD_DEFAULT, | |
1844 "JVM_FindClassFromBootLoader"); | |
1845 if (findBootClass == NULL) { | |
1846 fprintf(stderr, "Error: could load method JVM_FindClassFromBootLoader"); | |
1847 return NULL; | |
1848 } | |
1849 } | |
1850 return findBootClass(env, classname, JNI_FALSE); | |
1851 } | |
1852 |