J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1998-2007 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | #include "java.h" |
| 27 | #include <dirent.h> |
| 28 | #include <dlfcn.h> |
| 29 | #include <fcntl.h> |
| 30 | #include <inttypes.h> |
| 31 | #include <stdio.h> |
| 32 | #include <string.h> |
| 33 | #include <stdlib.h> |
| 34 | #include <sys/stat.h> |
| 35 | #include <unistd.h> |
| 36 | #include <sys/types.h> |
| 37 | #include "manifest_info.h" |
| 38 | #include "version_comp.h" |
| 39 | |
| 40 | #ifdef __linux__ |
| 41 | #include <pthread.h> |
| 42 | #else |
| 43 | #include <thread.h> |
| 44 | #endif |
| 45 | |
| 46 | #define JVM_DLL "libjvm.so" |
| 47 | #define JAVA_DLL "libjava.so" |
| 48 | |
| 49 | /* |
| 50 | * If a processor / os combination has the ability to run binaries of |
| 51 | * two data models and cohabitation of jre/jdk bits with both data |
| 52 | * models is supported, then DUAL_MODE is defined. When DUAL_MODE is |
| 53 | * defined, the architecture names for the narrow and wide version of |
| 54 | * the architecture are defined in LIBARCH64NAME and LIBARCH32NAME. Currently |
| 55 | * only Solaris on sparc/sparcv9 and i586/amd64 is DUAL_MODE; linux |
| 56 | * i586/amd64 could be defined as DUAL_MODE but that is not the |
| 57 | * current policy. |
| 58 | */ |
| 59 | |
| 60 | #ifdef __solaris__ |
| 61 | # define DUAL_MODE |
| 62 | # ifndef LIBARCH32NAME |
| 63 | # error "The macro LIBARCH32NAME was not defined on the compile line" |
| 64 | # endif |
| 65 | # ifndef LIBARCH64NAME |
| 66 | # error "The macro LIBARCH64NAME was not defined on the compile line" |
| 67 | # endif |
| 68 | # include <sys/systeminfo.h> |
| 69 | # include <sys/elf.h> |
| 70 | # include <stdio.h> |
| 71 | #endif |
| 72 | |
| 73 | /* pointer to environment */ |
| 74 | extern char **environ; |
| 75 | |
| 76 | /* |
| 77 | * A collection of useful strings. One should think of these as #define |
| 78 | * entries, but actual strings can be more efficient (with many compilers). |
| 79 | */ |
| 80 | #ifdef __linux__ |
| 81 | static const char *system_dir = "/usr/java"; |
| 82 | static const char *user_dir = "/java"; |
| 83 | #else /* Solaris */ |
| 84 | static const char *system_dir = "/usr/jdk"; |
| 85 | static const char *user_dir = "/jdk"; |
| 86 | #endif |
| 87 | |
| 88 | /* Store the name of the executable once computed */ |
| 89 | static char *execname = NULL; |
| 90 | |
| 91 | /* |
| 92 | * Flowchart of launcher execs and options processing on unix |
| 93 | * |
| 94 | * The selection of the proper vm shared library to open depends on |
| 95 | * several classes of command line options, including vm "flavor" |
| 96 | * options (-client, -server) and the data model options, -d32 and |
| 97 | * -d64, as well as a version specification which may have come from |
| 98 | * the command line or from the manifest of an executable jar file. |
| 99 | * The vm selection options are not passed to the running |
| 100 | * virtual machine; they must be screened out by the launcher. |
| 101 | * |
| 102 | * The version specification (if any) is processed first by the |
| 103 | * platform independent routine SelectVersion. This may result in |
| 104 | * the exec of the specified launcher version. |
| 105 | * |
| 106 | * Typically, the launcher execs at least once to ensure a suitable |
| 107 | * LD_LIBRARY_PATH is in effect for the process. The first exec |
| 108 | * screens out all the data model options; leaving the choice of data |
| 109 | * model implicit in the binary selected to run. However, in case no |
| 110 | * exec is done, the data model options are screened out before the vm |
| 111 | * is invoked. |
| 112 | * |
| 113 | * incoming argv ------------------------------ |
| 114 | * | | |
| 115 | * \|/ | |
| 116 | * CheckJVMType | |
| 117 | * (removes -client, -server, etc.) | |
| 118 | * \|/ |
| 119 | * CreateExecutionEnvironment |
| 120 | * (removes -d32 and -d64, |
| 121 | * determines desired data model, |
| 122 | * sets up LD_LIBRARY_PATH, |
| 123 | * and exec's) |
| 124 | * | |
| 125 | * -------------------------------------------- |
| 126 | * | |
| 127 | * \|/ |
| 128 | * exec child 1 incoming argv ----------------- |
| 129 | * | | |
| 130 | * \|/ | |
| 131 | * CheckJVMType | |
| 132 | * (removes -client, -server, etc.) | |
| 133 | * | \|/ |
| 134 | * | CreateExecutionEnvironment |
| 135 | * | (verifies desired data model |
| 136 | * | is running and acceptable |
| 137 | * | LD_LIBRARY_PATH; |
| 138 | * | no-op in child) |
| 139 | * | |
| 140 | * \|/ |
| 141 | * TranslateDashJArgs... |
| 142 | * (Prepare to pass args to vm) |
| 143 | * | |
| 144 | * | |
| 145 | * | |
| 146 | * \|/ |
| 147 | * ParseArguments |
| 148 | * (ignores -d32 and -d64, |
| 149 | * processes version options, |
| 150 | * creates argument list for vm, |
| 151 | * etc.) |
| 152 | * |
| 153 | */ |
| 154 | |
| 155 | static const char * SetExecname(char **argv); |
| 156 | static jboolean GetJVMPath(const char *jrepath, const char *jvmtype, |
| 157 | char *jvmpath, jint jvmpathsize, const char * arch); |
| 158 | static jboolean GetJREPath(char *path, jint pathsize, const char * arch, jboolean speculative); |
| 159 | |
| 160 | |
| 161 | #define GetArch() GetArchPath(CURRENT_DATA_MODEL) |
| 162 | |
| 163 | const char * |
| 164 | GetArchPath(int nbits) |
| 165 | { |
| 166 | switch(nbits) { |
| 167 | #ifdef DUAL_MODE |
| 168 | case 32: |
| 169 | return LIBARCH32NAME; |
| 170 | case 64: |
| 171 | return LIBARCH64NAME; |
| 172 | #endif /* DUAL_MODE */ |
| 173 | default: |
| 174 | return LIBARCHNAME; |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | void |
| 179 | CreateExecutionEnvironment(int *_argcp, |
| 180 | char ***_argvp, |
| 181 | char jrepath[], |
| 182 | jint so_jrepath, |
| 183 | char jvmpath[], |
| 184 | jint so_jvmpath, |
| 185 | char **original_argv) { |
| 186 | /* |
| 187 | * First, determine if we are running the desired data model. If we |
| 188 | * are running the desired data model, all the error messages |
| 189 | * associated with calling GetJREPath, ReadKnownVMs, etc. should be |
| 190 | * output. However, if we are not running the desired data model, |
| 191 | * some of the errors should be suppressed since it is more |
| 192 | * informative to issue an error message based on whether or not the |
| 193 | * os/processor combination has dual mode capabilities. |
| 194 | */ |
| 195 | |
| 196 | int original_argc = *_argcp; |
| 197 | jboolean jvmpathExists; |
| 198 | |
| 199 | /* Compute/set the name of the executable */ |
| 200 | SetExecname(*_argvp); |
| 201 | |
| 202 | /* Set the LD_LIBRARY_PATH environment variable, check data model |
| 203 | flags, and exec process, if needed */ |
| 204 | { |
| 205 | char *arch = (char *)GetArch(); /* like sparc or sparcv9 */ |
| 206 | char * jvmtype = NULL; |
| 207 | int argc = *_argcp; |
| 208 | char **argv = original_argv; |
| 209 | |
| 210 | char *runpath = NULL; /* existing effective LD_LIBRARY_PATH |
| 211 | setting */ |
| 212 | |
| 213 | int running = CURRENT_DATA_MODEL; |
| 214 | |
| 215 | int wanted = running; /* What data mode is being |
| 216 | asked for? Current model is |
| 217 | fine unless another model |
| 218 | is asked for */ |
| 219 | |
| 220 | char* new_runpath = NULL; /* desired new LD_LIBRARY_PATH string */ |
| 221 | char* newpath = NULL; /* path on new LD_LIBRARY_PATH */ |
| 222 | char* lastslash = NULL; |
| 223 | |
| 224 | char** newenvp = NULL; /* current environment */ |
| 225 | |
| 226 | char** newargv = NULL; |
| 227 | int newargc = 0; |
| 228 | #ifdef __solaris__ |
| 229 | char* dmpath = NULL; /* data model specific LD_LIBRARY_PATH, |
| 230 | Solaris only */ |
| 231 | #endif |
| 232 | |
| 233 | /* |
| 234 | * Starting in 1.5, all unix platforms accept the -d32 and -d64 |
| 235 | * options. On platforms where only one data-model is supported |
| 236 | * (e.g. ia-64 Linux), using the flag for the other data model is |
| 237 | * an error and will terminate the program. |
| 238 | */ |
| 239 | |
| 240 | { /* open new scope to declare local variables */ |
| 241 | int i; |
| 242 | |
| 243 | newargv = (char **)JLI_MemAlloc((argc+1) * sizeof(*newargv)); |
| 244 | newargv[newargc++] = argv[0]; |
| 245 | |
| 246 | /* scan for data model arguments and remove from argument list; |
| 247 | last occurrence determines desired data model */ |
| 248 | for (i=1; i < argc; i++) { |
| 249 | |
| 250 | if (JLI_StrCmp(argv[i], "-J-d64") == 0 || JLI_StrCmp(argv[i], "-d64") == 0) { |
| 251 | wanted = 64; |
| 252 | continue; |
| 253 | } |
| 254 | if (JLI_StrCmp(argv[i], "-J-d32") == 0 || JLI_StrCmp(argv[i], "-d32") == 0) { |
| 255 | wanted = 32; |
| 256 | continue; |
| 257 | } |
| 258 | newargv[newargc++] = argv[i]; |
| 259 | |
| 260 | if (IsJavaArgs()) { |
| 261 | if (argv[i][0] != '-') continue; |
| 262 | } else { |
| 263 | if (JLI_StrCmp(argv[i], "-classpath") == 0 || JLI_StrCmp(argv[i], "-cp") == 0) { |
| 264 | i++; |
| 265 | if (i >= argc) break; |
| 266 | newargv[newargc++] = argv[i]; |
| 267 | continue; |
| 268 | } |
| 269 | if (argv[i][0] != '-') { i++; break; } |
| 270 | } |
| 271 | } |
| 272 | |
| 273 | /* copy rest of args [i .. argc) */ |
| 274 | while (i < argc) { |
| 275 | newargv[newargc++] = argv[i++]; |
| 276 | } |
| 277 | newargv[newargc] = NULL; |
| 278 | |
| 279 | /* |
| 280 | * newargv has all proper arguments here |
| 281 | */ |
| 282 | |
| 283 | argc = newargc; |
| 284 | argv = newargv; |
| 285 | } |
| 286 | |
| 287 | /* If the data model is not changing, it is an error if the |
| 288 | jvmpath does not exist */ |
| 289 | if (wanted == running) { |
| 290 | /* Find out where the JRE is that we will be using. */ |
| 291 | if (!GetJREPath(jrepath, so_jrepath, arch, JNI_FALSE) ) { |
| 292 | ReportErrorMessage(JRE_ERROR1); |
| 293 | exit(2); |
| 294 | } |
| 295 | |
| 296 | /* Find the specified JVM type */ |
| 297 | if (ReadKnownVMs(jrepath, arch, JNI_FALSE) < 1) { |
| 298 | ReportErrorMessage(CFG_ERROR7); |
| 299 | exit(1); |
| 300 | } |
| 301 | |
| 302 | jvmpath[0] = '\0'; |
| 303 | jvmtype = CheckJvmType(_argcp, _argvp, JNI_FALSE); |
| 304 | |
| 305 | if (!GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath, arch )) { |
| 306 | ReportErrorMessage(CFG_ERROR8, jvmtype, jvmpath); |
| 307 | exit(4); |
| 308 | } |
| 309 | } else { /* do the same speculatively or exit */ |
| 310 | #ifdef DUAL_MODE |
| 311 | if (running != wanted) { |
| 312 | /* Find out where the JRE is that we will be using. */ |
| 313 | if (!GetJREPath(jrepath, so_jrepath, GetArchPath(wanted), JNI_TRUE)) { |
| 314 | goto EndDataModelSpeculate; |
| 315 | } |
| 316 | |
| 317 | /* |
| 318 | * Read in jvm.cfg for target data model and process vm |
| 319 | * selection options. |
| 320 | */ |
| 321 | if (ReadKnownVMs(jrepath, GetArchPath(wanted), JNI_TRUE) < 1) { |
| 322 | goto EndDataModelSpeculate; |
| 323 | } |
| 324 | jvmpath[0] = '\0'; |
| 325 | jvmtype = CheckJvmType(_argcp, _argvp, JNI_TRUE); |
| 326 | /* exec child can do error checking on the existence of the path */ |
| 327 | jvmpathExists = GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath, GetArchPath(wanted)); |
| 328 | |
| 329 | } |
| 330 | EndDataModelSpeculate: /* give up and let other code report error message */ |
| 331 | ; |
| 332 | #else |
| 333 | ReportErrorMessage(JRE_ERROR2, wanted); |
| 334 | exit(1); |
| 335 | #endif |
| 336 | } |
| 337 | |
| 338 | /* |
| 339 | * We will set the LD_LIBRARY_PATH as follows: |
| 340 | * |
| 341 | * o $JVMPATH (directory portion only) |
| 342 | * o $JRE/lib/$LIBARCHNAME |
| 343 | * o $JRE/../lib/$LIBARCHNAME |
| 344 | * |
| 345 | * followed by the user's previous effective LD_LIBRARY_PATH, if |
| 346 | * any. |
| 347 | */ |
| 348 | |
| 349 | #ifdef __solaris__ |
| 350 | /* |
| 351 | * Starting in Solaris 7, ld.so.1 supports three LD_LIBRARY_PATH |
| 352 | * variables: |
| 353 | * |
| 354 | * 1. LD_LIBRARY_PATH -- used for 32 and 64 bit searches if |
| 355 | * data-model specific variables are not set. |
| 356 | * |
| 357 | * 2. LD_LIBRARY_PATH_64 -- overrides and replaces LD_LIBRARY_PATH |
| 358 | * for 64-bit binaries. |
| 359 | * |
| 360 | * 3. LD_LIBRARY_PATH_32 -- overrides and replaces LD_LIBRARY_PATH |
| 361 | * for 32-bit binaries. |
| 362 | * |
| 363 | * The vm uses LD_LIBRARY_PATH to set the java.library.path system |
| 364 | * property. To shield the vm from the complication of multiple |
| 365 | * LD_LIBRARY_PATH variables, if the appropriate data model |
| 366 | * specific variable is set, we will act as if LD_LIBRARY_PATH had |
| 367 | * the value of the data model specific variant and the data model |
| 368 | * specific variant will be unset. Note that the variable for the |
| 369 | * *wanted* data model must be used (if it is set), not simply the |
| 370 | * current running data model. |
| 371 | */ |
| 372 | |
| 373 | switch(wanted) { |
| 374 | case 0: |
| 375 | if(running == 32) { |
| 376 | dmpath = getenv("LD_LIBRARY_PATH_32"); |
| 377 | wanted = 32; |
| 378 | } |
| 379 | else { |
| 380 | dmpath = getenv("LD_LIBRARY_PATH_64"); |
| 381 | wanted = 64; |
| 382 | } |
| 383 | break; |
| 384 | |
| 385 | case 32: |
| 386 | dmpath = getenv("LD_LIBRARY_PATH_32"); |
| 387 | break; |
| 388 | |
| 389 | case 64: |
| 390 | dmpath = getenv("LD_LIBRARY_PATH_64"); |
| 391 | break; |
| 392 | |
| 393 | default: |
| 394 | ReportErrorMessage(JRE_ERROR3, __LINE__); |
| 395 | exit(1); /* unknown value in wanted */ |
| 396 | break; |
| 397 | } |
| 398 | |
| 399 | /* |
| 400 | * If dmpath is NULL, the relevant data model specific variable is |
| 401 | * not set and normal LD_LIBRARY_PATH should be used. |
| 402 | */ |
| 403 | if( dmpath == NULL) { |
| 404 | runpath = getenv("LD_LIBRARY_PATH"); |
| 405 | } |
| 406 | else { |
| 407 | runpath = dmpath; |
| 408 | } |
| 409 | #else |
| 410 | /* |
| 411 | * If not on Solaris, assume only a single LD_LIBRARY_PATH |
| 412 | * variable. |
| 413 | */ |
| 414 | runpath = getenv("LD_LIBRARY_PATH"); |
| 415 | #endif /* __solaris__ */ |
| 416 | |
| 417 | #ifdef __linux |
| 418 | /* |
| 419 | * On linux, if a binary is running as sgid or suid, glibc sets |
| 420 | * LD_LIBRARY_PATH to the empty string for security purposes. (In |
| 421 | * contrast, on Solaris the LD_LIBRARY_PATH variable for a |
| 422 | * privileged binary does not lose its settings; but the dynamic |
| 423 | * linker does apply more scrutiny to the path.) The launcher uses |
| 424 | * the value of LD_LIBRARY_PATH to prevent an exec loop. |
| 425 | * Therefore, if we are running sgid or suid, this function's |
| 426 | * setting of LD_LIBRARY_PATH will be ineffective and we should |
| 427 | * return from the function now. Getting the right libraries to |
| 428 | * be found must be handled through other mechanisms. |
| 429 | */ |
| 430 | if((getgid() != getegid()) || (getuid() != geteuid()) ) { |
| 431 | return; |
| 432 | } |
| 433 | #endif |
| 434 | |
| 435 | /* runpath contains current effective LD_LIBRARY_PATH setting */ |
| 436 | |
| 437 | jvmpath = JLI_StringDup(jvmpath); |
| 438 | new_runpath = JLI_MemAlloc( ((runpath!=NULL)?JLI_StrLen(runpath):0) + |
| 439 | 2*JLI_StrLen(jrepath) + 2*JLI_StrLen(arch) + |
| 440 | JLI_StrLen(jvmpath) + 52); |
| 441 | newpath = new_runpath + JLI_StrLen("LD_LIBRARY_PATH="); |
| 442 | |
| 443 | |
| 444 | /* |
| 445 | * Create desired LD_LIBRARY_PATH value for target data model. |
| 446 | */ |
| 447 | { |
| 448 | /* remove the name of the .so from the JVM path */ |
| 449 | lastslash = JLI_StrRChr(jvmpath, '/'); |
| 450 | if (lastslash) |
| 451 | *lastslash = '\0'; |
| 452 | |
| 453 | |
| 454 | /* jvmpath, ((running != wanted)?((wanted==64)?"/"LIBARCH64NAME:"/.."):""), */ |
| 455 | |
| 456 | sprintf(new_runpath, "LD_LIBRARY_PATH=" |
| 457 | "%s:" |
| 458 | "%s/lib/%s:" |
| 459 | "%s/../lib/%s", |
| 460 | jvmpath, |
| 461 | #ifdef DUAL_MODE |
| 462 | jrepath, GetArchPath(wanted), |
| 463 | jrepath, GetArchPath(wanted) |
| 464 | #else |
| 465 | jrepath, arch, |
| 466 | jrepath, arch |
| 467 | #endif |
| 468 | ); |
| 469 | |
| 470 | |
| 471 | /* |
| 472 | * Check to make sure that the prefix of the current path is the |
| 473 | * desired environment variable setting. |
| 474 | */ |
| 475 | if (runpath != NULL && |
| 476 | JLI_StrNCmp(newpath, runpath, JLI_StrLen(newpath))==0 && |
| 477 | (runpath[JLI_StrLen(newpath)] == 0 || runpath[JLI_StrLen(newpath)] == ':') && |
| 478 | (running == wanted) /* data model does not have to be changed */ |
| 479 | #ifdef __solaris__ |
| 480 | && (dmpath == NULL) /* data model specific variables not set */ |
| 481 | #endif |
| 482 | ) { |
| 483 | |
| 484 | return; |
| 485 | |
| 486 | } |
| 487 | } |
| 488 | |
| 489 | /* |
| 490 | * Place the desired environment setting onto the prefix of |
| 491 | * LD_LIBRARY_PATH. Note that this prevents any possible infinite |
| 492 | * loop of execv() because we test for the prefix, above. |
| 493 | */ |
| 494 | if (runpath != 0) { |
| 495 | JLI_StrCat(new_runpath, ":"); |
| 496 | JLI_StrCat(new_runpath, runpath); |
| 497 | } |
| 498 | |
| 499 | if( putenv(new_runpath) != 0) { |
| 500 | exit(1); /* problem allocating memory; LD_LIBRARY_PATH not set |
| 501 | properly */ |
| 502 | } |
| 503 | |
| 504 | /* |
| 505 | * Unix systems document that they look at LD_LIBRARY_PATH only |
| 506 | * once at startup, so we have to re-exec the current executable |
| 507 | * to get the changed environment variable to have an effect. |
| 508 | */ |
| 509 | |
| 510 | #ifdef __solaris__ |
| 511 | /* |
| 512 | * If dmpath is not NULL, remove the data model specific string |
| 513 | * in the environment for the exec'ed child. |
| 514 | */ |
| 515 | |
| 516 | if( dmpath != NULL) |
| 517 | (void)UnsetEnv((wanted==32)?"LD_LIBRARY_PATH_32":"LD_LIBRARY_PATH_64"); |
| 518 | #endif |
| 519 | |
| 520 | newenvp = environ; |
| 521 | |
| 522 | { |
| 523 | char *newexec = execname; |
| 524 | #ifdef DUAL_MODE |
| 525 | /* |
| 526 | * If the data model is being changed, the path to the |
| 527 | * executable must be updated accordingly; the executable name |
| 528 | * and directory the executable resides in are separate. In the |
| 529 | * case of 32 => 64, the new bits are assumed to reside in, e.g. |
| 530 | * "olddir/LIBARCH64NAME/execname"; in the case of 64 => 32, |
| 531 | * the bits are assumed to be in "olddir/../execname". For example, |
| 532 | * |
| 533 | * olddir/sparcv9/execname |
| 534 | * olddir/amd64/execname |
| 535 | * |
| 536 | * for Solaris SPARC and Linux amd64, respectively. |
| 537 | */ |
| 538 | |
| 539 | if (running != wanted) { |
| 540 | char *oldexec = JLI_StrCpy(JLI_MemAlloc(JLI_StrLen(execname) + 1), execname); |
| 541 | char *olddir = oldexec; |
| 542 | char *oldbase = JLI_StrRChr(oldexec, '/'); |
| 543 | |
| 544 | |
| 545 | newexec = JLI_MemAlloc(JLI_StrLen(execname) + 20); |
| 546 | *oldbase++ = 0; |
| 547 | sprintf(newexec, "%s/%s/%s", olddir, |
| 548 | ((wanted==64) ? LIBARCH64NAME : ".."), oldbase); |
| 549 | argv[0] = newexec; |
| 550 | } |
| 551 | #endif |
| 552 | |
| 553 | (void)fflush(stdout); |
| 554 | (void)fflush(stderr); |
| 555 | execve(newexec, argv, newenvp); |
| 556 | ReportErrorMessageSys(JRE_ERROR4, newexec); |
| 557 | |
| 558 | #ifdef DUAL_MODE |
| 559 | if (running != wanted) { |
| 560 | ReportErrorMessage(JRE_ERROR5, wanted, running); |
| 561 | # ifdef __solaris__ |
| 562 | |
| 563 | # ifdef __sparc |
| 564 | ReportErrorMessage(JRE_ERROR6); |
| 565 | # else |
| 566 | ReportErrorMessage(JRE_ERROR7); |
| 567 | # endif |
| 568 | } |
| 569 | # endif |
| 570 | #endif |
| 571 | |
| 572 | } |
| 573 | |
| 574 | exit(1); |
| 575 | } |
| 576 | |
| 577 | } |
| 578 | |
| 579 | |
| 580 | /* |
| 581 | * On Solaris VM choosing is done by the launcher (java.c). |
| 582 | */ |
| 583 | static jboolean |
| 584 | GetJVMPath(const char *jrepath, const char *jvmtype, |
| 585 | char *jvmpath, jint jvmpathsize, const char * arch) |
| 586 | { |
| 587 | struct stat s; |
| 588 | |
| 589 | if (JLI_StrChr(jvmtype, '/')) { |
| 590 | sprintf(jvmpath, "%s/" JVM_DLL, jvmtype); |
| 591 | } else { |
| 592 | sprintf(jvmpath, "%s/lib/%s/%s/" JVM_DLL, jrepath, arch, jvmtype); |
| 593 | } |
| 594 | |
| 595 | JLI_TraceLauncher("Does `%s' exist ... ", jvmpath); |
| 596 | |
| 597 | if (stat(jvmpath, &s) == 0) { |
| 598 | JLI_TraceLauncher("yes.\n"); |
| 599 | return JNI_TRUE; |
| 600 | } else { |
| 601 | JLI_TraceLauncher("no.\n"); |
| 602 | return JNI_FALSE; |
| 603 | } |
| 604 | } |
| 605 | |
| 606 | /* |
| 607 | * Find path to JRE based on .exe's location or registry settings. |
| 608 | */ |
| 609 | static jboolean |
| 610 | GetJREPath(char *path, jint pathsize, const char * arch, jboolean speculative) |
| 611 | { |
| 612 | char libjava[MAXPATHLEN]; |
| 613 | |
| 614 | if (GetApplicationHome(path, pathsize)) { |
| 615 | /* Is JRE co-located with the application? */ |
| 616 | sprintf(libjava, "%s/lib/%s/" JAVA_DLL, path, arch); |
| 617 | if (access(libjava, F_OK) == 0) { |
| 618 | goto found; |
| 619 | } |
| 620 | |
| 621 | /* Does the app ship a private JRE in <apphome>/jre directory? */ |
| 622 | sprintf(libjava, "%s/jre/lib/%s/" JAVA_DLL, path, arch); |
| 623 | if (access(libjava, F_OK) == 0) { |
| 624 | JLI_StrCat(path, "/jre"); |
| 625 | goto found; |
| 626 | } |
| 627 | } |
| 628 | |
| 629 | if (!speculative) |
| 630 | ReportErrorMessage(JRE_ERROR8 JAVA_DLL); |
| 631 | return JNI_FALSE; |
| 632 | |
| 633 | found: |
| 634 | JLI_TraceLauncher("JRE path is %s\n", path); |
| 635 | return JNI_TRUE; |
| 636 | } |
| 637 | |
| 638 | jboolean |
| 639 | LoadJavaVM(const char *jvmpath, InvocationFunctions *ifn) |
| 640 | { |
| 641 | Dl_info dlinfo; |
| 642 | void *libjvm; |
| 643 | |
| 644 | JLI_TraceLauncher("JVM path is %s\n", jvmpath); |
| 645 | |
| 646 | libjvm = dlopen(jvmpath, RTLD_NOW + RTLD_GLOBAL); |
| 647 | if (libjvm == NULL) { |
| 648 | #if defined(__solaris__) && defined(__sparc) && !defined(_LP64) /* i.e. 32-bit sparc */ |
| 649 | FILE * fp; |
| 650 | Elf32_Ehdr elf_head; |
| 651 | int count; |
| 652 | int location; |
| 653 | |
| 654 | fp = fopen(jvmpath, "r"); |
| 655 | if(fp == NULL) |
| 656 | goto error; |
| 657 | |
| 658 | /* read in elf header */ |
| 659 | count = fread((void*)(&elf_head), sizeof(Elf32_Ehdr), 1, fp); |
| 660 | fclose(fp); |
| 661 | if(count < 1) |
| 662 | goto error; |
| 663 | |
| 664 | /* |
| 665 | * Check for running a server vm (compiled with -xarch=v8plus) |
| 666 | * on a stock v8 processor. In this case, the machine type in |
| 667 | * the elf header would not be included the architecture list |
| 668 | * provided by the isalist command, which is turn is gotten from |
| 669 | * sysinfo. This case cannot occur on 64-bit hardware and thus |
| 670 | * does not have to be checked for in binaries with an LP64 data |
| 671 | * model. |
| 672 | */ |
| 673 | if(elf_head.e_machine == EM_SPARC32PLUS) { |
| 674 | char buf[257]; /* recommended buffer size from sysinfo man |
| 675 | page */ |
| 676 | long length; |
| 677 | char* location; |
| 678 | |
| 679 | length = sysinfo(SI_ISALIST, buf, 257); |
| 680 | if(length > 0) { |
| 681 | location = JLI_StrStr(buf, "sparcv8plus "); |
| 682 | if(location == NULL) { |
| 683 | ReportErrorMessage(JVM_ERROR3); |
| 684 | return JNI_FALSE; |
| 685 | } |
| 686 | } |
| 687 | } |
| 688 | #endif |
| 689 | ReportErrorMessage(DLL_ERROR1, __LINE__); |
| 690 | goto error; |
| 691 | } |
| 692 | |
| 693 | ifn->CreateJavaVM = (CreateJavaVM_t) |
| 694 | dlsym(libjvm, "JNI_CreateJavaVM"); |
| 695 | if (ifn->CreateJavaVM == NULL) |
| 696 | goto error; |
| 697 | |
| 698 | ifn->GetDefaultJavaVMInitArgs = (GetDefaultJavaVMInitArgs_t) |
| 699 | dlsym(libjvm, "JNI_GetDefaultJavaVMInitArgs"); |
| 700 | if (ifn->GetDefaultJavaVMInitArgs == NULL) |
| 701 | goto error; |
| 702 | |
| 703 | return JNI_TRUE; |
| 704 | |
| 705 | error: |
| 706 | ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror()); |
| 707 | return JNI_FALSE; |
| 708 | } |
| 709 | |
| 710 | /* |
| 711 | * If app is "/foo/bin/javac", or "/foo/bin/sparcv9/javac" then put |
| 712 | * "/foo" into buf. |
| 713 | */ |
| 714 | jboolean |
| 715 | GetApplicationHome(char *buf, jint bufsize) |
| 716 | { |
| 717 | if (execname != NULL) { |
| 718 | JLI_StrNCpy(buf, execname, bufsize-1); |
| 719 | buf[bufsize-1] = '\0'; |
| 720 | } else { |
| 721 | return JNI_FALSE; |
| 722 | } |
| 723 | |
| 724 | if (JLI_StrRChr(buf, '/') == 0) { |
| 725 | buf[0] = '\0'; |
| 726 | return JNI_FALSE; |
| 727 | } |
| 728 | *(JLI_StrRChr(buf, '/')) = '\0'; /* executable file */ |
| 729 | if (JLI_StrLen(buf) < 4 || JLI_StrRChr(buf, '/') == 0) { |
| 730 | buf[0] = '\0'; |
| 731 | return JNI_FALSE; |
| 732 | } |
| 733 | if (JLI_StrCmp("/bin", buf + JLI_StrLen(buf) - 4) != 0) |
| 734 | *(JLI_StrRChr(buf, '/')) = '\0'; /* sparcv9 or amd64 */ |
| 735 | if (JLI_StrLen(buf) < 4 || JLI_StrCmp("/bin", buf + JLI_StrLen(buf) - 4) != 0) { |
| 736 | buf[0] = '\0'; |
| 737 | return JNI_FALSE; |
| 738 | } |
| 739 | *(JLI_StrRChr(buf, '/')) = '\0'; /* bin */ |
| 740 | |
| 741 | return JNI_TRUE; |
| 742 | } |
| 743 | |
| 744 | |
| 745 | /* |
| 746 | * Return true if the named program exists |
| 747 | */ |
| 748 | static int |
| 749 | ProgramExists(char *name) |
| 750 | { |
| 751 | struct stat sb; |
| 752 | if (stat(name, &sb) != 0) return 0; |
| 753 | if (S_ISDIR(sb.st_mode)) return 0; |
| 754 | return (sb.st_mode & S_IEXEC) != 0; |
| 755 | } |
| 756 | |
| 757 | |
| 758 | /* |
| 759 | * Find a command in a directory, returning the path. |
| 760 | */ |
| 761 | static char * |
| 762 | Resolve(char *indir, char *cmd) |
| 763 | { |
| 764 | char name[PATH_MAX + 2], *real; |
| 765 | |
| 766 | if ((JLI_StrLen(indir) + JLI_StrLen(cmd) + 1) > PATH_MAX) return 0; |
| 767 | sprintf(name, "%s%c%s", indir, FILE_SEPARATOR, cmd); |
| 768 | if (!ProgramExists(name)) return 0; |
| 769 | real = JLI_MemAlloc(PATH_MAX + 2); |
| 770 | if (!realpath(name, real)) |
| 771 | JLI_StrCpy(real, name); |
| 772 | return real; |
| 773 | } |
| 774 | |
| 775 | |
| 776 | /* |
| 777 | * Find a path for the executable |
| 778 | */ |
| 779 | static char * |
| 780 | FindExecName(char *program) |
| 781 | { |
| 782 | char cwdbuf[PATH_MAX+2]; |
| 783 | char *path; |
| 784 | char *tmp_path; |
| 785 | char *f; |
| 786 | char *result = NULL; |
| 787 | |
| 788 | /* absolute path? */ |
| 789 | if (*program == FILE_SEPARATOR || |
| 790 | (FILE_SEPARATOR=='\\' && JLI_StrRChr(program, ':'))) |
| 791 | return Resolve("", program+1); |
| 792 | |
| 793 | /* relative path? */ |
| 794 | if (JLI_StrRChr(program, FILE_SEPARATOR) != 0) { |
| 795 | char buf[PATH_MAX+2]; |
| 796 | return Resolve(getcwd(cwdbuf, sizeof(cwdbuf)), program); |
| 797 | } |
| 798 | |
| 799 | /* from search path? */ |
| 800 | path = getenv("PATH"); |
| 801 | if (!path || !*path) path = "."; |
| 802 | tmp_path = JLI_MemAlloc(JLI_StrLen(path) + 2); |
| 803 | JLI_StrCpy(tmp_path, path); |
| 804 | |
| 805 | for (f=tmp_path; *f && result==0; ) { |
| 806 | char *s = f; |
| 807 | while (*f && (*f != PATH_SEPARATOR)) ++f; |
| 808 | if (*f) *f++ = 0; |
| 809 | if (*s == FILE_SEPARATOR) |
| 810 | result = Resolve(s, program); |
| 811 | else { |
| 812 | /* relative path element */ |
| 813 | char dir[2*PATH_MAX]; |
| 814 | sprintf(dir, "%s%c%s", getcwd(cwdbuf, sizeof(cwdbuf)), |
| 815 | FILE_SEPARATOR, s); |
| 816 | result = Resolve(dir, program); |
| 817 | } |
| 818 | if (result != 0) break; |
| 819 | } |
| 820 | |
| 821 | JLI_MemFree(tmp_path); |
| 822 | return result; |
| 823 | } |
| 824 | |
| 825 | |
| 826 | |
| 827 | /* |
| 828 | * Compute the name of the executable |
| 829 | * |
| 830 | * In order to re-exec securely we need the absolute path of the |
| 831 | * executable. On Solaris getexecname(3c) may not return an absolute |
| 832 | * path so we use dladdr to get the filename of the executable and |
| 833 | * then use realpath to derive an absolute path. From Solaris 9 |
| 834 | * onwards the filename returned in DL_info structure from dladdr is |
| 835 | * an absolute pathname so technically realpath isn't required. |
| 836 | * On Linux we read the executable name from /proc/self/exe. |
| 837 | * As a fallback, and for platforms other than Solaris and Linux, |
| 838 | * we use FindExecName to compute the executable name. |
| 839 | */ |
| 840 | static const char* |
| 841 | SetExecname(char **argv) |
| 842 | { |
| 843 | char* exec_path = NULL; |
| 844 | #if defined(__solaris__) |
| 845 | { |
| 846 | Dl_info dlinfo; |
| 847 | int (*fptr)(); |
| 848 | |
| 849 | fptr = (int (*)())dlsym(RTLD_DEFAULT, "main"); |
| 850 | if (fptr == NULL) { |
| 851 | ReportErrorMessage(DLL_ERROR3, dlerror()); |
| 852 | return JNI_FALSE; |
| 853 | } |
| 854 | |
| 855 | if (dladdr((void*)fptr, &dlinfo)) { |
| 856 | char *resolved = (char*)JLI_MemAlloc(PATH_MAX+1); |
| 857 | if (resolved != NULL) { |
| 858 | exec_path = realpath(dlinfo.dli_fname, resolved); |
| 859 | if (exec_path == NULL) { |
| 860 | JLI_MemFree(resolved); |
| 861 | } |
| 862 | } |
| 863 | } |
| 864 | } |
| 865 | #elif defined(__linux__) |
| 866 | { |
| 867 | const char* self = "/proc/self/exe"; |
| 868 | char buf[PATH_MAX+1]; |
| 869 | int len = readlink(self, buf, PATH_MAX); |
| 870 | if (len >= 0) { |
| 871 | buf[len] = '\0'; /* readlink doesn't nul terminate */ |
| 872 | exec_path = JLI_StringDup(buf); |
| 873 | } |
| 874 | } |
| 875 | #else /* !__solaris__ && !__linux */ |
| 876 | { |
| 877 | /* Not implemented */ |
| 878 | } |
| 879 | #endif |
| 880 | |
| 881 | if (exec_path == NULL) { |
| 882 | exec_path = FindExecName(argv[0]); |
| 883 | } |
| 884 | execname = exec_path; |
| 885 | return exec_path; |
| 886 | } |
| 887 | |
| 888 | void ReportErrorMessage(const char* fmt, ...) { |
| 889 | va_list vl; |
| 890 | va_start(vl, fmt); |
| 891 | vfprintf(stderr, fmt, vl); |
| 892 | fprintf(stderr, "\n"); |
| 893 | va_end(vl); |
| 894 | } |
| 895 | |
| 896 | void ReportErrorMessageSys(const char* fmt, ...) { |
| 897 | va_list vl; |
| 898 | char *emsg; |
| 899 | |
| 900 | /* |
| 901 | * TODO: its safer to use strerror_r but is not available on |
| 902 | * Solaris 8. Until then.... |
| 903 | */ |
| 904 | emsg = strerror(errno); |
| 905 | if (emsg != NULL) { |
| 906 | fprintf(stderr, "%s\n", emsg); |
| 907 | } |
| 908 | |
| 909 | va_start(vl, fmt); |
| 910 | vfprintf(stderr, fmt, vl); |
| 911 | fprintf(stderr, "\n"); |
| 912 | va_end(vl); |
| 913 | } |
| 914 | |
| 915 | void ReportExceptionDescription(JNIEnv * env) { |
| 916 | (*env)->ExceptionDescribe(env); |
| 917 | } |
| 918 | |
| 919 | /* |
| 920 | * Since using the file system as a registry is a bit risky, perform |
| 921 | * additional sanity checks on the identified directory to validate |
| 922 | * it as a valid jre/sdk. |
| 923 | * |
| 924 | * Return 0 if the tests fail; otherwise return non-zero (true). |
| 925 | * |
| 926 | * Note that checking for anything more than the existence of an |
| 927 | * executable object at bin/java relative to the path being checked |
| 928 | * will break the regression tests. |
| 929 | */ |
| 930 | static int |
| 931 | CheckSanity(char *path, char *dir) |
| 932 | { |
| 933 | char buffer[PATH_MAX]; |
| 934 | |
| 935 | if (JLI_StrLen(path) + JLI_StrLen(dir) + 11 > PATH_MAX) |
| 936 | return (0); /* Silently reject "impossibly" long paths */ |
| 937 | |
| 938 | sprintf(buffer, "%s/%s/bin/java", path, dir); |
| 939 | return ((access(buffer, X_OK) == 0) ? 1 : 0); |
| 940 | } |
| 941 | |
| 942 | /* |
| 943 | * Determine if there is an acceptable JRE in the directory dirname. |
| 944 | * Upon locating the "best" one, return a fully qualified path to |
| 945 | * it. "Best" is defined as the most advanced JRE meeting the |
| 946 | * constraints contained in the manifest_info. If no JRE in this |
| 947 | * directory meets the constraints, return NULL. |
| 948 | * |
| 949 | * Note that we don't check for errors in reading the directory |
| 950 | * (which would be done by checking errno). This is because it |
| 951 | * doesn't matter if we get an error reading the directory, or |
| 952 | * we just don't find anything interesting in the directory. We |
| 953 | * just return NULL in either case. |
| 954 | * |
| 955 | * The historical names of j2sdk and j2re were changed to jdk and |
| 956 | * jre respecively as part of the 1.5 rebranding effort. Since the |
| 957 | * former names are legacy on Linux, they must be recognized for |
| 958 | * all time. Fortunately, this is a minor cost. |
| 959 | */ |
| 960 | static char |
| 961 | *ProcessDir(manifest_info *info, char *dirname) |
| 962 | { |
| 963 | DIR *dirp; |
| 964 | struct dirent *dp; |
| 965 | char *best = NULL; |
| 966 | int offset; |
| 967 | int best_offset = 0; |
| 968 | char *ret_str = NULL; |
| 969 | char buffer[PATH_MAX]; |
| 970 | |
| 971 | if ((dirp = opendir(dirname)) == NULL) |
| 972 | return (NULL); |
| 973 | |
| 974 | do { |
| 975 | if ((dp = readdir(dirp)) != NULL) { |
| 976 | offset = 0; |
| 977 | if ((JLI_StrNCmp(dp->d_name, "jre", 3) == 0) || |
| 978 | (JLI_StrNCmp(dp->d_name, "jdk", 3) == 0)) |
| 979 | offset = 3; |
| 980 | else if (JLI_StrNCmp(dp->d_name, "j2re", 4) == 0) |
| 981 | offset = 4; |
| 982 | else if (JLI_StrNCmp(dp->d_name, "j2sdk", 5) == 0) |
| 983 | offset = 5; |
| 984 | if (offset > 0) { |
| 985 | if ((JLI_AcceptableRelease(dp->d_name + offset, |
| 986 | info->jre_version)) && CheckSanity(dirname, dp->d_name)) |
| 987 | if ((best == NULL) || (JLI_ExactVersionId( |
| 988 | dp->d_name + offset, best + best_offset) > 0)) { |
| 989 | if (best != NULL) |
| 990 | JLI_MemFree(best); |
| 991 | best = JLI_StringDup(dp->d_name); |
| 992 | best_offset = offset; |
| 993 | } |
| 994 | } |
| 995 | } |
| 996 | } while (dp != NULL); |
| 997 | (void) closedir(dirp); |
| 998 | if (best == NULL) |
| 999 | return (NULL); |
| 1000 | else { |
| 1001 | ret_str = JLI_MemAlloc(JLI_StrLen(dirname) + JLI_StrLen(best) + 2); |
| 1002 | sprintf(ret_str, "%s/%s", dirname, best); |
| 1003 | JLI_MemFree(best); |
| 1004 | return (ret_str); |
| 1005 | } |
| 1006 | } |
| 1007 | |
| 1008 | /* |
| 1009 | * This is the global entry point. It examines the host for the optimal |
| 1010 | * JRE to be used by scanning a set of directories. The set of directories |
| 1011 | * is platform dependent and can be overridden by the environment |
| 1012 | * variable JAVA_VERSION_PATH. |
| 1013 | * |
| 1014 | * This routine itself simply determines the set of appropriate |
| 1015 | * directories before passing control onto ProcessDir(). |
| 1016 | */ |
| 1017 | char* |
| 1018 | LocateJRE(manifest_info* info) |
| 1019 | { |
| 1020 | char *path; |
| 1021 | char *home; |
| 1022 | char *target = NULL; |
| 1023 | char *dp; |
| 1024 | char *cp; |
| 1025 | |
| 1026 | /* |
| 1027 | * Start by getting JAVA_VERSION_PATH |
| 1028 | */ |
| 1029 | if (info->jre_restrict_search) { |
| 1030 | path = JLI_StringDup(system_dir); |
| 1031 | } else if ((path = getenv("JAVA_VERSION_PATH")) != NULL) { |
| 1032 | path = JLI_StringDup(path); |
| 1033 | } else { |
| 1034 | if ((home = getenv("HOME")) != NULL) { |
| 1035 | path = (char *)JLI_MemAlloc(JLI_StrLen(home) + \ |
| 1036 | JLI_StrLen(system_dir) + JLI_StrLen(user_dir) + 2); |
| 1037 | sprintf(path, "%s%s:%s", home, user_dir, system_dir); |
| 1038 | } else { |
| 1039 | path = JLI_StringDup(system_dir); |
| 1040 | } |
| 1041 | } |
| 1042 | |
| 1043 | /* |
| 1044 | * Step through each directory on the path. Terminate the scan with |
| 1045 | * the first directory with an acceptable JRE. |
| 1046 | */ |
| 1047 | cp = dp = path; |
| 1048 | while (dp != NULL) { |
| 1049 | cp = JLI_StrChr(dp, (int)':'); |
| 1050 | if (cp != NULL) |
| 1051 | *cp = (char)NULL; |
| 1052 | if ((target = ProcessDir(info, dp)) != NULL) |
| 1053 | break; |
| 1054 | dp = cp; |
| 1055 | if (dp != NULL) |
| 1056 | dp++; |
| 1057 | } |
| 1058 | JLI_MemFree(path); |
| 1059 | return (target); |
| 1060 | } |
| 1061 | |
| 1062 | /* |
| 1063 | * Given a path to a jre to execute, this routine checks if this process |
| 1064 | * is indeed that jre. If not, it exec's that jre. |
| 1065 | * |
| 1066 | * We want to actually check the paths rather than just the version string |
| 1067 | * built into the executable, so that given version specification (and |
| 1068 | * JAVA_VERSION_PATH) will yield the exact same Java environment, regardless |
| 1069 | * of the version of the arbitrary launcher we start with. |
| 1070 | */ |
| 1071 | void |
| 1072 | ExecJRE(char *jre, char **argv) |
| 1073 | { |
| 1074 | char wanted[PATH_MAX]; |
| 1075 | const char* progname = GetProgramName(); |
| 1076 | |
| 1077 | /* |
| 1078 | * Resolve the real path to the directory containing the selected JRE. |
| 1079 | */ |
| 1080 | if (realpath(jre, wanted) == NULL) { |
| 1081 | ReportErrorMessage(JRE_ERROR9, jre); |
| 1082 | exit(1); |
| 1083 | } |
| 1084 | |
| 1085 | /* |
| 1086 | * Resolve the real path to the currently running launcher. |
| 1087 | */ |
| 1088 | SetExecname(argv); |
| 1089 | if (execname == NULL) { |
| 1090 | ReportErrorMessage(JRE_ERROR10); |
| 1091 | exit(1); |
| 1092 | } |
| 1093 | |
| 1094 | /* |
| 1095 | * If the path to the selected JRE directory is a match to the initial |
| 1096 | * portion of the path to the currently executing JRE, we have a winner! |
| 1097 | * If so, just return. |
| 1098 | */ |
| 1099 | if (JLI_StrNCmp(wanted, execname, JLI_StrLen(wanted)) == 0) |
| 1100 | return; /* I am the droid you were looking for */ |
| 1101 | |
| 1102 | |
| 1103 | /* |
| 1104 | * This should never happen (because of the selection code in SelectJRE), |
| 1105 | * but check for "impossibly" long path names just because buffer overruns |
| 1106 | * can be so deadly. |
| 1107 | */ |
| 1108 | if (JLI_StrLen(wanted) + JLI_StrLen(progname) + 6 > PATH_MAX) { |
| 1109 | ReportErrorMessage(JRE_ERROR11); |
| 1110 | exit(1); |
| 1111 | } |
| 1112 | |
| 1113 | /* |
| 1114 | * Construct the path and exec it. |
| 1115 | */ |
| 1116 | (void)JLI_StrCat(JLI_StrCat(wanted, "/bin/"), progname); |
| 1117 | argv[0] = JLI_StringDup(progname); |
| 1118 | if (JLI_IsTraceLauncher()) { |
| 1119 | int i; |
| 1120 | printf("ReExec Command: %s (%s)\n", wanted, argv[0]); |
| 1121 | printf("ReExec Args:"); |
| 1122 | for (i = 1; argv[i] != NULL; i++) |
| 1123 | printf(" %s", argv[i]); |
| 1124 | printf("\n"); |
| 1125 | } |
| 1126 | (void)fflush(stdout); |
| 1127 | (void)fflush(stderr); |
| 1128 | execv(wanted, argv); |
| 1129 | ReportErrorMessageSys(JRE_ERROR12, wanted); |
| 1130 | exit(1); |
| 1131 | } |
| 1132 | |
| 1133 | /* |
| 1134 | * "Borrowed" from Solaris 10 where the unsetenv() function is being added |
| 1135 | * to libc thanks to SUSv3 (Standard Unix Specification, version 3). As |
| 1136 | * such, in the fullness of time this will appear in libc on all relevant |
| 1137 | * Solaris/Linux platforms and maybe even the Windows platform. At that |
| 1138 | * time, this stub can be removed. |
| 1139 | * |
| 1140 | * This implementation removes the environment locking for multithreaded |
| 1141 | * applications. (We don't have access to these mutexes within libc and |
| 1142 | * the launcher isn't multithreaded.) Note that what remains is platform |
| 1143 | * independent, because it only relies on attributes that a POSIX environment |
| 1144 | * defines. |
| 1145 | * |
| 1146 | * Returns 0 on success, -1 on failure. |
| 1147 | * |
| 1148 | * Also removed was the setting of errno. The only value of errno set |
| 1149 | * was EINVAL ("Invalid Argument"). |
| 1150 | */ |
| 1151 | |
| 1152 | /* |
| 1153 | * s1(environ) is name=value |
| 1154 | * s2(name) is name(not the form of name=value). |
| 1155 | * if names match, return value of 1, else return 0 |
| 1156 | */ |
| 1157 | static int |
| 1158 | match_noeq(const char *s1, const char *s2) |
| 1159 | { |
| 1160 | while (*s1 == *s2++) { |
| 1161 | if (*s1++ == '=') |
| 1162 | return (1); |
| 1163 | } |
| 1164 | if (*s1 == '=' && s2[-1] == '\0') |
| 1165 | return (1); |
| 1166 | return (0); |
| 1167 | } |
| 1168 | |
| 1169 | /* |
| 1170 | * added for SUSv3 standard |
| 1171 | * |
| 1172 | * Delete entry from environ. |
| 1173 | * Do not free() memory! Other threads may be using it. |
| 1174 | * Keep it around forever. |
| 1175 | */ |
| 1176 | static int |
| 1177 | borrowed_unsetenv(const char *name) |
| 1178 | { |
| 1179 | long idx; /* index into environ */ |
| 1180 | |
| 1181 | if (name == NULL || *name == '\0' || |
| 1182 | JLI_StrChr(name, '=') != NULL) { |
| 1183 | return (-1); |
| 1184 | } |
| 1185 | |
| 1186 | for (idx = 0; environ[idx] != NULL; idx++) { |
| 1187 | if (match_noeq(environ[idx], name)) |
| 1188 | break; |
| 1189 | } |
| 1190 | if (environ[idx] == NULL) { |
| 1191 | /* name not found but still a success */ |
| 1192 | return (0); |
| 1193 | } |
| 1194 | /* squeeze up one entry */ |
| 1195 | do { |
| 1196 | environ[idx] = environ[idx+1]; |
| 1197 | } while (environ[++idx] != NULL); |
| 1198 | |
| 1199 | return (0); |
| 1200 | } |
| 1201 | /* --- End of "borrowed" code --- */ |
| 1202 | |
| 1203 | /* |
| 1204 | * Wrapper for unsetenv() function. |
| 1205 | */ |
| 1206 | int |
| 1207 | UnsetEnv(char *name) |
| 1208 | { |
| 1209 | return(borrowed_unsetenv(name)); |
| 1210 | } |
| 1211 | |
| 1212 | /* --- Splash Screen shared library support --- */ |
| 1213 | |
| 1214 | static const char* SPLASHSCREEN_SO = "libsplashscreen.so"; |
| 1215 | |
| 1216 | static void* hSplashLib = NULL; |
| 1217 | |
| 1218 | void* SplashProcAddress(const char* name) { |
| 1219 | if (!hSplashLib) { |
| 1220 | hSplashLib = dlopen(SPLASHSCREEN_SO, RTLD_LAZY | RTLD_GLOBAL); |
| 1221 | } |
| 1222 | if (hSplashLib) { |
| 1223 | void* sym = dlsym(hSplashLib, name); |
| 1224 | return sym; |
| 1225 | } else { |
| 1226 | return NULL; |
| 1227 | } |
| 1228 | } |
| 1229 | |
| 1230 | void SplashFreeLibrary() { |
| 1231 | if (hSplashLib) { |
| 1232 | dlclose(hSplashLib); |
| 1233 | hSplashLib = NULL; |
| 1234 | } |
| 1235 | } |
| 1236 | |
| 1237 | const char * |
| 1238 | jlong_format_specifier() { |
| 1239 | return "%lld"; |
| 1240 | } |
| 1241 | |
| 1242 | |
| 1243 | |
| 1244 | /* |
| 1245 | * Block current thread and continue execution in a new thread |
| 1246 | */ |
| 1247 | int |
| 1248 | ContinueInNewThread0(int (JNICALL *continuation)(void *), jlong stack_size, void * args) { |
| 1249 | int rslt; |
| 1250 | #ifdef __linux__ |
| 1251 | pthread_t tid; |
| 1252 | pthread_attr_t attr; |
| 1253 | pthread_attr_init(&attr); |
| 1254 | pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE); |
| 1255 | |
| 1256 | if (stack_size > 0) { |
| 1257 | pthread_attr_setstacksize(&attr, stack_size); |
| 1258 | } |
| 1259 | |
| 1260 | if (pthread_create(&tid, &attr, (void *(*)(void*))continuation, (void*)args) == 0) { |
| 1261 | void * tmp; |
| 1262 | pthread_join(tid, &tmp); |
| 1263 | rslt = (int)tmp; |
| 1264 | } else { |
| 1265 | /* |
| 1266 | * Continue execution in current thread if for some reason (e.g. out of |
| 1267 | * memory/LWP) a new thread can't be created. This will likely fail |
| 1268 | * later in continuation as JNI_CreateJavaVM needs to create quite a |
| 1269 | * few new threads, anyway, just give it a try.. |
| 1270 | */ |
| 1271 | rslt = continuation(args); |
| 1272 | } |
| 1273 | |
| 1274 | pthread_attr_destroy(&attr); |
| 1275 | #else |
| 1276 | thread_t tid; |
| 1277 | long flags = 0; |
| 1278 | if (thr_create(NULL, stack_size, (void *(*)(void *))continuation, args, flags, &tid) == 0) { |
| 1279 | void * tmp; |
| 1280 | thr_join(tid, NULL, &tmp); |
| 1281 | rslt = (int)tmp; |
| 1282 | } else { |
| 1283 | /* See above. Continue in current thread if thr_create() failed */ |
| 1284 | rslt = continuation(args); |
| 1285 | } |
| 1286 | #endif |
| 1287 | return rslt; |
| 1288 | } |
| 1289 | |
| 1290 | /* Coarse estimation of number of digits assuming the worst case is a 64-bit pid. */ |
| 1291 | #define MAX_PID_STR_SZ 20 |
| 1292 | |
| 1293 | void SetJavaLauncherPlatformProps() { |
| 1294 | /* Linux only */ |
| 1295 | #ifdef __linux__ |
| 1296 | const char *substr = "-Dsun.java.launcher.pid="; |
| 1297 | char *pid_prop_str = (char *)JLI_MemAlloc(JLI_StrLen(substr) + MAX_PID_STR_SZ + 1); |
| 1298 | sprintf(pid_prop_str, "%s%d", substr, getpid()); |
| 1299 | AddOption(pid_prop_str, NULL); |
| 1300 | #endif |
| 1301 | } |
| 1302 | void |
| 1303 | SetJavaw() |
| 1304 | { |
| 1305 | /* noop on UNIX */ |
| 1306 | return; |
| 1307 | } |
| 1308 | |
| 1309 | jboolean |
| 1310 | IsJavaw() |
| 1311 | { |
| 1312 | /* noop on UNIX */ |
| 1313 | return JNI_FALSE; |
| 1314 | } |