1 /* 2 * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 /* 26 * Gamma (Hotspot internal engineering test) launcher based on 1.6.0-b28 JDK, 27 * search "GAMMA" for gamma specific changes. 28 */ 29 30 #include "java.h" 31 #include <dirent.h> 32 #include <dlfcn.h> 33 #include <fcntl.h> 34 #include <inttypes.h> 35 #include <stdio.h> 36 #include <string.h> 37 #include <stdlib.h> 38 #include <limits.h> 39 #include <sys/stat.h> 40 #include <unistd.h> 41 #include <sys/types.h> 42 43 #ifndef GAMMA 44 #include "manifest_info.h" 45 #include "version_comp.h" 46 #endif 47 48 #define JVM_DLL "libjvm.so" 49 #define JAVA_DLL "libjava.so" 50 51 #ifndef GAMMA /* launcher.make defines ARCH */ 52 53 /* 54 * If a processor / os combination has the ability to run binaries of 55 * two data models and cohabitation of jre/jdk bits with both data 56 * models is supported, then DUAL_MODE is defined. When DUAL_MODE is 57 * defined, the architecture names for the narrow and wide version of 58 * the architecture are defined in BIG_ARCH and SMALL_ARCH. Currently 59 * only Solaris on sparc/sparcv9 and i586/amd64 is DUAL_MODE; linux 60 * i586/amd64 could be defined as DUAL_MODE but that is not the 61 * current policy. 62 */ 63 64 #ifdef _LP64 65 66 # ifdef ia64 67 # define ARCH "ia64" 68 # elif defined(amd64) 69 # define ARCH "amd64" 70 # elif defined(__sparc) 71 # define ARCH "sparcv9" 72 # else 73 # define ARCH "unknown" /* unknown 64-bit architecture */ 74 # endif 75 76 #else /* 32-bit data model */ 77 78 # ifdef i586 79 # define ARCH "i386" 80 # elif defined(__sparc) 81 # define ARCH "sparc" 82 # endif 83 84 #endif /* _LP64 */ 85 86 #ifdef __sun 87 # define DUAL_MODE 88 # ifdef __sparc 89 # define BIG_ARCH "sparcv9" 90 # define SMALL_ARCH "sparc" 91 # else 92 # define BIG_ARCH "amd64" 93 # define SMALL_ARCH "i386" 94 # endif 95 # include <sys/systeminfo.h> 96 # include <sys/elf.h> 97 # include <stdio.h> 98 #else 99 # ifndef ARCH 100 # include <sys/systeminfo.h> 101 # endif 102 #endif 103 104 #endif /* ifndef GAMMA */ 105 106 /* pointer to environment */ 107 extern char **environ; 108 109 #ifndef GAMMA 110 111 /* 112 * A collection of useful strings. One should think of these as #define 113 * entries, but actual strings can be more efficient (with many compilers). 114 */ 115 #ifdef __linux__ 116 static const char *system_dir = "/usr/java"; 117 static const char *user_dir = "/java"; 118 #else /* Solaris */ 119 static const char *system_dir = "/usr/jdk"; 120 static const char *user_dir = "/jdk"; 121 #endif 122 123 #endif /* ifndef GAMMA */ 124 125 /* 126 * Flowchart of launcher execs and options processing on unix 127 * 128 * The selection of the proper vm shared library to open depends on 129 * several classes of command line options, including vm "flavor" 130 * options (-client, -server) and the data model options, -d32 and 131 * -d64, as well as a version specification which may have come from 132 * the command line or from the manifest of an executable jar file. 133 * The vm selection options are not passed to the running 134 * virtual machine; they must be screened out by the launcher. 135 * 136 * The version specification (if any) is processed first by the 137 * platform independent routine SelectVersion. This may result in 138 * the exec of the specified launcher version. 139 * 140 * Typically, the launcher execs at least once to ensure a suitable 141 * LD_LIBRARY_PATH is in effect for the process. The first exec 142 * screens out all the data model options; leaving the choice of data 143 * model implicit in the binary selected to run. However, in case no 144 * exec is done, the data model options are screened out before the vm 145 * is invoked. 146 * 147 * incoming argv ------------------------------ 148 * | | 149 * \|/ | 150 * CheckJVMType | 151 * (removes -client, -server, etc.) | 152 * \|/ 153 * CreateExecutionEnvironment 154 * (removes -d32 and -d64, 155 * determines desired data model, 156 * sets up LD_LIBRARY_PATH, 157 * and exec's) 158 * | 159 * -------------------------------------------- 160 * | 161 * \|/ 162 * exec child 1 incoming argv ----------------- 163 * | | 164 * \|/ | 165 * CheckJVMType | 166 * (removes -client, -server, etc.) | 167 * | \|/ 168 * | CreateExecutionEnvironment 169 * | (verifies desired data model 170 * | is running and acceptable 171 * | LD_LIBRARY_PATH; 172 * | no-op in child) 173 * | 174 * \|/ 175 * TranslateDashJArgs... 176 * (Prepare to pass args to vm) 177 * | 178 * | 179 * | 180 * \|/ 181 * ParseArguments 182 * (ignores -d32 and -d64, 183 * processes version options, 184 * creates argument list for vm, 185 * etc.) 186 * 187 */ 188 189 static char *SetExecname(char **argv); 190 static char * GetExecname(); 191 static jboolean GetJVMPath(const char *jrepath, const char *jvmtype, 192 char *jvmpath, jint jvmpathsize, char * arch); 193 static jboolean GetJREPath(char *path, jint pathsize, char * arch, jboolean speculative); 194 195 const char * 196 GetArch() 197 { 198 static char *arch = NULL; 199 static char buf[12]; 200 if (arch) { 201 return arch; 202 } 203 204 #ifdef ARCH 205 strcpy(buf, ARCH); 206 #else 207 sysinfo(SI_ARCHITECTURE, buf, sizeof(buf)); 208 #endif 209 arch = buf; 210 return arch; 211 } 212 213 void 214 CreateExecutionEnvironment(int *_argcp, 215 char ***_argvp, 216 char jrepath[], 217 jint so_jrepath, 218 char jvmpath[], 219 jint so_jvmpath, 220 char **original_argv) { 221 /* 222 * First, determine if we are running the desired data model. If we 223 * are running the desired data model, all the error messages 224 * associated with calling GetJREPath, ReadKnownVMs, etc. should be 225 * output. However, if we are not running the desired data model, 226 * some of the errors should be suppressed since it is more 227 * informative to issue an error message based on whether or not the 228 * os/processor combination has dual mode capabilities. 229 */ 230 231 char *execname = NULL; 232 int original_argc = *_argcp; 233 jboolean jvmpathExists; 234 235 /* Compute the name of the executable */ 236 execname = SetExecname(*_argvp); 237 238 #ifndef GAMMA 239 /* Set the LD_LIBRARY_PATH environment variable, check data model 240 flags, and exec process, if needed */ 241 { 242 char *arch = (char *)GetArch(); /* like sparc or sparcv9 */ 243 char * jvmtype = NULL; 244 int argc = *_argcp; 245 char **argv = original_argv; 246 247 char *runpath = NULL; /* existing effective LD_LIBRARY_PATH 248 setting */ 249 250 int running = /* What data model is being ILP32 => 251 32 bit vm; LP64 => 64 bit vm */ 252 #ifdef _LP64 253 64; 254 #else 255 32; 256 #endif 257 258 int wanted = running; /* What data mode is being 259 asked for? Current model is 260 fine unless another model 261 is asked for */ 262 263 char* new_runpath = NULL; /* desired new LD_LIBRARY_PATH string */ 264 char* newpath = NULL; /* path on new LD_LIBRARY_PATH */ 265 char* lastslash = NULL; 266 267 char** newenvp = NULL; /* current environment */ 268 269 char** newargv = NULL; 270 int newargc = 0; 271 #ifdef __sun 272 char* dmpath = NULL; /* data model specific LD_LIBRARY_PATH, 273 Solaris only */ 274 #endif 275 276 /* 277 * Starting in 1.5, all unix platforms accept the -d32 and -d64 278 * options. On platforms where only one data-model is supported 279 * (e.g. ia-64 Linux), using the flag for the other data model is 280 * an error and will terminate the program. 281 */ 282 283 { /* open new scope to declare local variables */ 284 int i; 285 286 newargv = (char **)MemAlloc((argc+1) * sizeof(*newargv)); 287 newargv[newargc++] = argv[0]; 288 289 /* scan for data model arguments and remove from argument list; 290 last occurrence determines desired data model */ 291 for (i=1; i < argc; i++) { 292 293 if (strcmp(argv[i], "-J-d64") == 0 || strcmp(argv[i], "-d64") == 0) { 294 wanted = 64; 295 continue; 296 } 297 if (strcmp(argv[i], "-J-d32") == 0 || strcmp(argv[i], "-d32") == 0) { 298 wanted = 32; 299 continue; 300 } 301 newargv[newargc++] = argv[i]; 302 303 #ifdef JAVA_ARGS 304 if (argv[i][0] != '-') 305 continue; 306 #else 307 if (strcmp(argv[i], "-classpath") == 0 || strcmp(argv[i], "-cp") == 0) { 308 i++; 309 if (i >= argc) break; 310 newargv[newargc++] = argv[i]; 311 continue; 312 } 313 if (argv[i][0] != '-') { i++; break; } 314 #endif 315 } 316 317 /* copy rest of args [i .. argc) */ 318 while (i < argc) { 319 newargv[newargc++] = argv[i++]; 320 } 321 newargv[newargc] = NULL; 322 323 /* 324 * newargv has all proper arguments here 325 */ 326 327 argc = newargc; 328 argv = newargv; 329 } 330 331 /* If the data model is not changing, it is an error if the 332 jvmpath does not exist */ 333 if (wanted == running) { 334 /* Find out where the JRE is that we will be using. */ 335 if (!GetJREPath(jrepath, so_jrepath, arch, JNI_FALSE) ) { 336 fprintf(stderr, "Error: could not find Java 2 Runtime Environment.\n"); 337 exit(2); 338 } 339 340 /* Find the specified JVM type */ 341 if (ReadKnownVMs(jrepath, arch, JNI_FALSE) < 1) { 342 fprintf(stderr, "Error: no known VMs. (check for corrupt jvm.cfg file)\n"); 343 exit(1); 344 } 345 346 jvmpath[0] = '\0'; 347 jvmtype = CheckJvmType(_argcp, _argvp, JNI_FALSE); 348 349 if (!GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath, arch )) { 350 fprintf(stderr, "Error: no `%s' JVM at `%s'.\n", jvmtype, jvmpath); 351 exit(4); 352 } 353 } else { /* do the same speculatively or exit */ 354 #ifdef DUAL_MODE 355 if (running != wanted) { 356 /* Find out where the JRE is that we will be using. */ 357 if (!GetJREPath(jrepath, so_jrepath, ((wanted==64)?BIG_ARCH:SMALL_ARCH), JNI_TRUE)) { 358 goto EndDataModelSpeculate; 359 } 360 361 /* 362 * Read in jvm.cfg for target data model and process vm 363 * selection options. 364 */ 365 if (ReadKnownVMs(jrepath, ((wanted==64)?BIG_ARCH:SMALL_ARCH), JNI_TRUE) < 1) { 366 goto EndDataModelSpeculate; 367 } 368 jvmpath[0] = '\0'; 369 jvmtype = CheckJvmType(_argcp, _argvp, JNI_TRUE); 370 /* exec child can do error checking on the existence of the path */ 371 jvmpathExists = GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath, 372 ((wanted==64)?BIG_ARCH:SMALL_ARCH)); 373 374 } 375 EndDataModelSpeculate: /* give up and let other code report error message */ 376 ; 377 #else 378 fprintf(stderr, "Running a %d-bit JVM is not supported on this platform.\n", wanted); 379 exit(1); 380 #endif 381 } 382 383 /* 384 * We will set the LD_LIBRARY_PATH as follows: 385 * 386 * o $JVMPATH (directory portion only) 387 * o $JRE/lib/$ARCH 388 * o $JRE/../lib/$ARCH 389 * 390 * followed by the user's previous effective LD_LIBRARY_PATH, if 391 * any. 392 */ 393 394 #ifdef __sun 395 /* 396 * Starting in Solaris 7, ld.so.1 supports three LD_LIBRARY_PATH 397 * variables: 398 * 399 * 1. LD_LIBRARY_PATH -- used for 32 and 64 bit searches if 400 * data-model specific variables are not set. 401 * 402 * 2. LD_LIBRARY_PATH_64 -- overrides and replaces LD_LIBRARY_PATH 403 * for 64-bit binaries. 404 * 405 * 3. LD_LIBRARY_PATH_32 -- overrides and replaces LD_LIBRARY_PATH 406 * for 32-bit binaries. 407 * 408 * The vm uses LD_LIBRARY_PATH to set the java.library.path system 409 * property. To shield the vm from the complication of multiple 410 * LD_LIBRARY_PATH variables, if the appropriate data model 411 * specific variable is set, we will act as if LD_LIBRARY_PATH had 412 * the value of the data model specific variant and the data model 413 * specific variant will be unset. Note that the variable for the 414 * *wanted* data model must be used (if it is set), not simply the 415 * current running data model. 416 */ 417 418 switch(wanted) { 419 case 0: 420 if(running == 32) { 421 dmpath = getenv("LD_LIBRARY_PATH_32"); 422 wanted = 32; 423 } 424 else { 425 dmpath = getenv("LD_LIBRARY_PATH_64"); 426 wanted = 64; 427 } 428 break; 429 430 case 32: 431 dmpath = getenv("LD_LIBRARY_PATH_32"); 432 break; 433 434 case 64: 435 dmpath = getenv("LD_LIBRARY_PATH_64"); 436 break; 437 438 default: 439 fprintf(stderr, "Improper value at line %d.", __LINE__); 440 exit(1); /* unknown value in wanted */ 441 break; 442 } 443 444 /* 445 * If dmpath is NULL, the relevant data model specific variable is 446 * not set and normal LD_LIBRARY_PATH should be used. 447 */ 448 if( dmpath == NULL) { 449 runpath = getenv("LD_LIBRARY_PATH"); 450 } 451 else { 452 runpath = dmpath; 453 } 454 #else 455 /* 456 * If not on Solaris, assume only a single LD_LIBRARY_PATH 457 * variable. 458 */ 459 runpath = getenv("LD_LIBRARY_PATH"); 460 #endif /* __sun */ 461 462 #ifdef __linux 463 /* 464 * On linux, if a binary is running as sgid or suid, glibc sets 465 * LD_LIBRARY_PATH to the empty string for security purposes. (In 466 * contrast, on Solaris the LD_LIBRARY_PATH variable for a 467 * privileged binary does not lose its settings; but the dynamic 468 * linker does apply more scrutiny to the path.) The launcher uses 469 * the value of LD_LIBRARY_PATH to prevent an exec loop. 470 * Therefore, if we are running sgid or suid, this function's 471 * setting of LD_LIBRARY_PATH will be ineffective and we should 472 * return from the function now. Getting the right libraries to 473 * be found must be handled through other mechanisms. 474 */ 475 if((getgid() != getegid()) || (getuid() != geteuid()) ) { 476 return; 477 } 478 #endif 479 480 /* runpath contains current effective LD_LIBRARY_PATH setting */ 481 482 jvmpath = strdup(jvmpath); 483 new_runpath = MemAlloc( ((runpath!=NULL)?strlen(runpath):0) + 484 2*strlen(jrepath) + 2*strlen(arch) + 485 strlen(jvmpath) + 52); 486 newpath = new_runpath + strlen("LD_LIBRARY_PATH="); 487 488 489 /* 490 * Create desired LD_LIBRARY_PATH value for target data model. 491 */ 492 { 493 /* remove the name of the .so from the JVM path */ 494 lastslash = strrchr(jvmpath, '/'); 495 if (lastslash) 496 *lastslash = '\0'; 497 498 499 /* jvmpath, ((running != wanted)?((wanted==64)?"/"BIG_ARCH:"/.."):""), */ 500 501 sprintf(new_runpath, "LD_LIBRARY_PATH=" 502 "%s:" 503 "%s/lib/%s:" 504 "%s/../lib/%s", 505 jvmpath, 506 #ifdef DUAL_MODE 507 jrepath, ((wanted==64)?BIG_ARCH:SMALL_ARCH), 508 jrepath, ((wanted==64)?BIG_ARCH:SMALL_ARCH) 509 #else 510 jrepath, arch, 511 jrepath, arch 512 #endif 513 ); 514 515 516 /* 517 * Check to make sure that the prefix of the current path is the 518 * desired environment variable setting. 519 */ 520 if (runpath != NULL && 521 strncmp(newpath, runpath, strlen(newpath))==0 && 522 (runpath[strlen(newpath)] == 0 || runpath[strlen(newpath)] == ':') && 523 (running == wanted) /* data model does not have to be changed */ 524 #ifdef __sun 525 && (dmpath == NULL) /* data model specific variables not set */ 526 #endif 527 ) { 528 529 return; 530 531 } 532 } 533 534 /* 535 * Place the desired environment setting onto the prefix of 536 * LD_LIBRARY_PATH. Note that this prevents any possible infinite 537 * loop of execv() because we test for the prefix, above. 538 */ 539 if (runpath != 0) { 540 strcat(new_runpath, ":"); 541 strcat(new_runpath, runpath); 542 } 543 544 if( putenv(new_runpath) != 0) { 545 exit(1); /* problem allocating memory; LD_LIBRARY_PATH not set 546 properly */ 547 } 548 549 /* 550 * Unix systems document that they look at LD_LIBRARY_PATH only 551 * once at startup, so we have to re-exec the current executable 552 * to get the changed environment variable to have an effect. 553 */ 554 555 #ifdef __sun 556 /* 557 * If dmpath is not NULL, remove the data model specific string 558 * in the environment for the exec'ed child. 559 */ 560 561 if( dmpath != NULL) 562 (void)UnsetEnv((wanted==32)?"LD_LIBRARY_PATH_32":"LD_LIBRARY_PATH_64"); 563 #endif 564 565 newenvp = environ; 566 567 { 568 char *newexec = execname; 569 #ifdef DUAL_MODE 570 /* 571 * If the data model is being changed, the path to the 572 * executable must be updated accordingly; the executable name 573 * and directory the executable resides in are separate. In the 574 * case of 32 => 64, the new bits are assumed to reside in, e.g. 575 * "olddir/BIGARCH/execname"; in the case of 64 => 32, 576 * the bits are assumed to be in "olddir/../execname". For example, 577 * 578 * olddir/sparcv9/execname 579 * olddir/amd64/execname 580 * 581 * for Solaris SPARC and Linux amd64, respectively. 582 */ 583 584 if (running != wanted) { 585 char *oldexec = strcpy(MemAlloc(strlen(execname) + 1), execname); 586 char *olddir = oldexec; 587 char *oldbase = strrchr(oldexec, '/'); 588 589 590 newexec = MemAlloc(strlen(execname) + 20); 591 *oldbase++ = 0; 592 sprintf(newexec, "%s/%s/%s", olddir, 593 ((wanted==64) ? BIG_ARCH : ".."), oldbase); 594 argv[0] = newexec; 595 } 596 #endif 597 598 execve(newexec, argv, newenvp); 599 perror("execve()"); 600 601 fprintf(stderr, "Error trying to exec %s.\n", newexec); 602 fprintf(stderr, "Check if file exists and permissions are set correctly.\n"); 603 604 #ifdef DUAL_MODE 605 if (running != wanted) { 606 fprintf(stderr, "Failed to start a %d-bit JVM process from a %d-bit JVM.\n", 607 wanted, running); 608 # ifdef __sun 609 610 # ifdef __sparc 611 fprintf(stderr, "Verify all necessary J2SE components have been installed.\n" ); 612 fprintf(stderr, 613 "(Solaris SPARC 64-bit components must be installed after 32-bit components.)\n" ); 614 # else 615 fprintf(stderr, "Either 64-bit processes are not supported by this platform\n"); 616 fprintf(stderr, "or the 64-bit components have not been installed.\n"); 617 # endif 618 } 619 # endif 620 #endif 621 622 } 623 624 exit(1); 625 } 626 627 #else /* ifndef GAMMA */ 628 629 /* gamma launcher is simpler in that it doesn't handle VM flavors, data */ 630 /* model, LD_LIBRARY_PATH, etc. Assuming everything is set-up correctly */ 631 /* all we need to do here is to return correct path names. See also */ 632 /* GetJVMPath() and GetApplicationHome(). */ 633 634 { char *arch = (char *)GetArch(); /* like sparc or sparcv9 */ 635 char *p; 636 637 if (!GetJREPath(jrepath, so_jrepath, arch, JNI_FALSE) ) { 638 fprintf(stderr, "Error: could not find Java 2 Runtime Environment.\n"); 639 exit(2); 640 } 641 642 if (!GetJVMPath(jrepath, NULL, jvmpath, so_jvmpath, arch )) { 643 fprintf(stderr, "Error: no JVM at `%s'.\n", jvmpath); 644 exit(4); 645 } 646 } 647 648 #endif /* ifndef GAMMA */ 649 } 650 651 652 /* 653 * On Solaris VM choosing is done by the launcher (java.c). 654 */ 655 static jboolean 656 GetJVMPath(const char *jrepath, const char *jvmtype, 657 char *jvmpath, jint jvmpathsize, char * arch) 658 { 659 struct stat s; 660 661 #ifndef GAMMA 662 if (strchr(jvmtype, '/')) { 663 sprintf(jvmpath, "%s/" JVM_DLL, jvmtype); 664 } else { 665 sprintf(jvmpath, "%s/lib/%s/%s/" JVM_DLL, jrepath, arch, jvmtype); 666 } 667 #else 668 /* For gamma launcher, JVM is either built-in or in the same directory. */ 669 /* Either way we return "<exe_path>/libjvm.so" where <exe_path> is the */ 670 /* directory where gamma launcher is located. */ 671 672 char *p; 673 674 snprintf(jvmpath, jvmpathsize, "%s", GetExecname()); 675 p = strrchr(jvmpath, '/'); 676 if (p) { 677 /* replace executable name with libjvm.so */ 678 snprintf(p + 1, jvmpathsize - (p + 1 - jvmpath), "%s", JVM_DLL); 679 } else { 680 /* this case shouldn't happen */ 681 snprintf(jvmpath, jvmpathsize, "%s", JVM_DLL); 682 } 683 #endif 684 685 if (_launcher_debug) 686 printf("Does `%s' exist ... ", jvmpath); 687 688 if (stat(jvmpath, &s) == 0) { 689 if (_launcher_debug) 690 printf("yes.\n"); 691 return JNI_TRUE; 692 } else { 693 if (_launcher_debug) 694 printf("no.\n"); 695 return JNI_FALSE; 696 } 697 } 698 699 /* 700 * Find path to JRE based on .exe's location or registry settings. 701 */ 702 static jboolean 703 GetJREPath(char *path, jint pathsize, char * arch, jboolean speculative) 704 { 705 char libjava[MAXPATHLEN]; 706 707 if (GetApplicationHome(path, pathsize)) { 708 /* Is JRE co-located with the application? */ 709 sprintf(libjava, "%s/lib/%s/" JAVA_DLL, path, arch); 710 if (access(libjava, F_OK) == 0) { 711 goto found; 712 } 713 714 /* Does the app ship a private JRE in <apphome>/jre directory? */ 715 sprintf(libjava, "%s/jre/lib/%s/" JAVA_DLL, path, arch); 716 if (access(libjava, F_OK) == 0) { 717 strcat(path, "/jre"); 718 goto found; 719 } 720 } 721 722 if (!speculative) 723 fprintf(stderr, "Error: could not find " JAVA_DLL "\n"); 724 return JNI_FALSE; 725 726 found: 727 if (_launcher_debug) 728 printf("JRE path is %s\n", path); 729 return JNI_TRUE; 730 } 731 732 jboolean 733 LoadJavaVM(const char *jvmpath, InvocationFunctions *ifn) 734 { 735 #ifdef GAMMA 736 /* JVM is directly linked with gamma launcher; no dlopen() */ 737 ifn->CreateJavaVM = JNI_CreateJavaVM; 738 ifn->GetDefaultJavaVMInitArgs = JNI_GetDefaultJavaVMInitArgs; 739 return JNI_TRUE; 740 #else 741 Dl_info dlinfo; 742 void *libjvm; 743 744 if (_launcher_debug) { 745 printf("JVM path is %s\n", jvmpath); 746 } 747 748 libjvm = dlopen(jvmpath, RTLD_NOW + RTLD_GLOBAL); 749 if (libjvm == NULL) { 750 #if defined(__sparc) && !defined(_LP64) /* i.e. 32-bit sparc */ 751 FILE * fp; 752 Elf32_Ehdr elf_head; 753 int count; 754 int location; 755 756 fp = fopen(jvmpath, "r"); 757 if(fp == NULL) 758 goto error; 759 760 /* read in elf header */ 761 count = fread((void*)(&elf_head), sizeof(Elf32_Ehdr), 1, fp); 762 fclose(fp); 763 if(count < 1) 764 goto error; 765 766 /* 767 * Check for running a server vm (compiled with -xarch=v8plus) 768 * on a stock v8 processor. In this case, the machine type in 769 * the elf header would not be included the architecture list 770 * provided by the isalist command, which is turn is gotten from 771 * sysinfo. This case cannot occur on 64-bit hardware and thus 772 * does not have to be checked for in binaries with an LP64 data 773 * model. 774 */ 775 if(elf_head.e_machine == EM_SPARC32PLUS) { 776 char buf[257]; /* recommended buffer size from sysinfo man 777 page */ 778 long length; 779 char* location; 780 781 length = sysinfo(SI_ISALIST, buf, 257); 782 if(length > 0) { 783 location = strstr(buf, "sparcv8plus "); 784 if(location == NULL) { 785 fprintf(stderr, "SPARC V8 processor detected; Server compiler requires V9 or better.\n"); 786 fprintf(stderr, "Use Client compiler on V8 processors.\n"); 787 fprintf(stderr, "Could not create the Java virtual machine.\n"); 788 return JNI_FALSE; 789 } 790 } 791 } 792 #endif 793 fprintf(stderr, "dl failure on line %d", __LINE__); 794 goto error; 795 } 796 797 ifn->CreateJavaVM = (CreateJavaVM_t) 798 dlsym(libjvm, "JNI_CreateJavaVM"); 799 if (ifn->CreateJavaVM == NULL) 800 goto error; 801 802 ifn->GetDefaultJavaVMInitArgs = (GetDefaultJavaVMInitArgs_t) 803 dlsym(libjvm, "JNI_GetDefaultJavaVMInitArgs"); 804 if (ifn->GetDefaultJavaVMInitArgs == NULL) 805 goto error; 806 807 return JNI_TRUE; 808 809 error: 810 fprintf(stderr, "Error: failed %s, because %s\n", jvmpath, dlerror()); 811 return JNI_FALSE; 812 #endif /* GAMMA */ 813 } 814 815 /* 816 * Get the path to the file that has the usage message for -X options. 817 */ 818 void 819 GetXUsagePath(char *buf, jint bufsize) 820 { 821 static const char Xusage_txt[] = "/Xusage.txt"; 822 Dl_info dlinfo; 823 824 /* we use RTLD_NOW because of problems with ld.so.1 and green threads */ 825 dladdr(dlsym(dlopen(JVM_DLL, RTLD_NOW), "JNI_CreateJavaVM"), &dlinfo); 826 strncpy(buf, (char *)dlinfo.dli_fname, bufsize - sizeof(Xusage_txt)); 827 828 buf[bufsize-1] = '\0'; 829 strcpy(strrchr(buf, '/'), Xusage_txt); 830 } 831 832 /* 833 * If app is "/foo/bin/javac", or "/foo/bin/sparcv9/javac" then put 834 * "/foo" into buf. 835 */ 836 jboolean 837 GetApplicationHome(char *buf, jint bufsize) 838 { 839 #ifdef __linux__ 840 char *execname = GetExecname(); 841 if (execname) { 842 strncpy(buf, execname, bufsize-1); 843 buf[bufsize-1] = '\0'; 844 } else { 845 return JNI_FALSE; 846 } 847 #else 848 Dl_info dlinfo; 849 850 dladdr((void *)GetApplicationHome, &dlinfo); 851 if (realpath(dlinfo.dli_fname, buf) == NULL) { 852 fprintf(stderr, "Error: realpath(`%s') failed.\n", dlinfo.dli_fname); 853 return JNI_FALSE; 854 } 855 #endif 856 857 #ifdef GAMMA 858 { 859 /* gamma launcher uses JAVA_HOME environment variable to find JDK/JRE */ 860 char* java_home_var = getenv("JAVA_HOME"); 861 if (java_home_var == NULL) { 862 printf("JAVA_HOME must point to a valid JDK/JRE to run gamma\n"); 863 return JNI_FALSE; 864 } 865 snprintf(buf, bufsize, "%s", java_home_var); 866 } 867 #else 868 if (strrchr(buf, '/') == 0) { 869 buf[0] = '\0'; 870 return JNI_FALSE; 871 } 872 *(strrchr(buf, '/')) = '\0'; /* executable file */ 873 if (strlen(buf) < 4 || strrchr(buf, '/') == 0) { 874 buf[0] = '\0'; 875 return JNI_FALSE; 876 } 877 if (strcmp("/bin", buf + strlen(buf) - 4) != 0) 878 *(strrchr(buf, '/')) = '\0'; /* sparcv9 or amd64 */ 879 if (strlen(buf) < 4 || strcmp("/bin", buf + strlen(buf) - 4) != 0) { 880 buf[0] = '\0'; 881 return JNI_FALSE; 882 } 883 *(strrchr(buf, '/')) = '\0'; /* bin */ 884 #endif /* GAMMA */ 885 886 return JNI_TRUE; 887 } 888 889 890 /* 891 * Return true if the named program exists 892 */ 893 static int 894 ProgramExists(char *name) 895 { 896 struct stat sb; 897 if (stat(name, &sb) != 0) return 0; 898 if (S_ISDIR(sb.st_mode)) return 0; 899 return (sb.st_mode & S_IEXEC) != 0; 900 } 901 902 903 /* 904 * Find a command in a directory, returning the path. 905 */ 906 static char * 907 Resolve(char *indir, char *cmd) 908 { 909 char name[PATH_MAX + 2], *real; 910 911 if ((strlen(indir) + strlen(cmd) + 1) > PATH_MAX) return 0; 912 sprintf(name, "%s%c%s", indir, FILE_SEPARATOR, cmd); 913 if (!ProgramExists(name)) return 0; 914 real = MemAlloc(PATH_MAX + 2); 915 if (!realpath(name, real)) 916 strcpy(real, name); 917 return real; 918 } 919 920 921 /* 922 * Find a path for the executable 923 */ 924 static char * 925 FindExecName(char *program) 926 { 927 char cwdbuf[PATH_MAX+2]; 928 char *path; 929 char *tmp_path; 930 char *f; 931 char *result = NULL; 932 933 /* absolute path? */ 934 if (*program == FILE_SEPARATOR || 935 (FILE_SEPARATOR=='\\' && strrchr(program, ':'))) 936 return Resolve("", program+1); 937 938 /* relative path? */ 939 if (strrchr(program, FILE_SEPARATOR) != 0) { 940 char buf[PATH_MAX+2]; 941 return Resolve(getcwd(cwdbuf, sizeof(cwdbuf)), program); 942 } 943 944 /* from search path? */ 945 path = getenv("PATH"); 946 if (!path || !*path) path = "."; 947 tmp_path = MemAlloc(strlen(path) + 2); 948 strcpy(tmp_path, path); 949 950 for (f=tmp_path; *f && result==0; ) { 951 char *s = f; 952 while (*f && (*f != PATH_SEPARATOR)) ++f; 953 if (*f) *f++ = 0; 954 if (*s == FILE_SEPARATOR) 955 result = Resolve(s, program); 956 else { 957 /* relative path element */ 958 char dir[2*PATH_MAX]; 959 sprintf(dir, "%s%c%s", getcwd(cwdbuf, sizeof(cwdbuf)), 960 FILE_SEPARATOR, s); 961 result = Resolve(dir, program); 962 } 963 if (result != 0) break; 964 } 965 966 free(tmp_path); 967 return result; 968 } 969 970 971 /* Store the name of the executable once computed */ 972 static char *execname = NULL; 973 974 /* 975 * Compute the name of the executable 976 * 977 * In order to re-exec securely we need the absolute path of the 978 * executable. On Solaris getexecname(3c) may not return an absolute 979 * path so we use dladdr to get the filename of the executable and 980 * then use realpath to derive an absolute path. From Solaris 9 981 * onwards the filename returned in DL_info structure from dladdr is 982 * an absolute pathname so technically realpath isn't required. 983 * On Linux we read the executable name from /proc/self/exe. 984 * As a fallback, and for platforms other than Solaris and Linux, 985 * we use FindExecName to compute the executable name. 986 */ 987 static char * 988 SetExecname(char **argv) 989 { 990 char* exec_path = NULL; 991 992 if (execname != NULL) /* Already determined */ 993 return (execname); 994 995 #if defined(__sun) 996 { 997 Dl_info dlinfo; 998 if (dladdr((void*)&SetExecname, &dlinfo)) { 999 char *resolved = (char*)MemAlloc(PATH_MAX+1); 1000 if (resolved != NULL) { 1001 exec_path = realpath(dlinfo.dli_fname, resolved); 1002 if (exec_path == NULL) { 1003 free(resolved); 1004 } 1005 } 1006 } 1007 } 1008 #elif defined(__linux__) 1009 { 1010 const char* self = "/proc/self/exe"; 1011 char buf[PATH_MAX+1]; 1012 int len = readlink(self, buf, PATH_MAX); 1013 if (len >= 0) { 1014 buf[len] = '\0'; /* readlink doesn't nul terminate */ 1015 exec_path = strdup(buf); 1016 } 1017 } 1018 #else /* !__sun && !__linux */ 1019 { 1020 /* Not implemented */ 1021 } 1022 #endif 1023 1024 if (exec_path == NULL) { 1025 exec_path = FindExecName(argv[0]); 1026 } 1027 execname = exec_path; 1028 return exec_path; 1029 } 1030 1031 /* 1032 * Return the name of the executable. Used in java_md.c to find the JRE area. 1033 */ 1034 static char * 1035 GetExecname() { 1036 return execname; 1037 } 1038 1039 void ReportErrorMessage(char * message, jboolean always) { 1040 if (always) { 1041 fprintf(stderr, "%s\n", message); 1042 } 1043 } 1044 1045 void ReportErrorMessage2(char * format, char * string, jboolean always) { 1046 if (always) { 1047 fprintf(stderr, format, string); 1048 fprintf(stderr, "\n"); 1049 } 1050 } 1051 1052 void ReportExceptionDescription(JNIEnv * env) { 1053 (*env)->ExceptionDescribe(env); 1054 } 1055 1056 /* 1057 * Return JNI_TRUE for an option string that has no effect but should 1058 * _not_ be passed on to the vm; return JNI_FALSE otherwise. On 1059 * Solaris SPARC, this screening needs to be done if: 1060 * 1) LD_LIBRARY_PATH does _not_ need to be reset and 1061 * 2) -d32 or -d64 is passed to a binary with a matching data model 1062 * (the exec in SetLibraryPath removes -d<n> options and points the 1063 * exec to the proper binary). When this exec is not done, these options 1064 * would end up getting passed onto the vm. 1065 */ 1066 jboolean RemovableMachineDependentOption(char * option) { 1067 /* 1068 * Unconditionally remove both -d32 and -d64 options since only 1069 * the last such options has an effect; e.g. 1070 * java -d32 -d64 -d32 -version 1071 * is equivalent to 1072 * java -d32 -version 1073 */ 1074 1075 if( (strcmp(option, "-d32") == 0 ) || 1076 (strcmp(option, "-d64") == 0 )) 1077 return JNI_TRUE; 1078 else 1079 return JNI_FALSE; 1080 } 1081 1082 void PrintMachineDependentOptions() { 1083 fprintf(stdout, 1084 " -d32 use a 32-bit data model if available\n" 1085 "\n" 1086 " -d64 use a 64-bit data model if available\n"); 1087 return; 1088 } 1089 1090 #ifndef GAMMA /* gamma launcher does not have ergonomics */ 1091 1092 /* 1093 * The following methods (down to ServerClassMachine()) answer 1094 * the question about whether a machine is a "server-class" 1095 * machine. A server-class machine is loosely defined as one 1096 * with 2 or more processors and 2 gigabytes or more physical 1097 * memory. The definition of a processor is a physical package, 1098 * not a hyperthreaded chip masquerading as a multi-processor. 1099 * The definition of memory is also somewhat fuzzy, since x86 1100 * machines seem not to report all the memory in their DIMMs, we 1101 * think because of memory mapping of graphics cards, etc. 1102 * 1103 * This code is somewhat more confused with #ifdef's than we'd 1104 * like because this file is used by both Solaris and Linux 1105 * platforms, and so needs to be parameterized for SPARC and 1106 * i586 hardware. The other Linux platforms (amd64 and ia64) 1107 * don't even ask this question, because they only come with 1108 * server JVMs. */ 1109 1110 # define KB (1024UL) 1111 # define MB (1024UL * KB) 1112 # define GB (1024UL * MB) 1113 1114 /* Compute physical memory by asking the OS */ 1115 uint64_t 1116 physical_memory(void) { 1117 const uint64_t pages = (uint64_t) sysconf(_SC_PHYS_PAGES); 1118 const uint64_t page_size = (uint64_t) sysconf(_SC_PAGESIZE); 1119 const uint64_t result = pages * page_size; 1120 # define UINT64_FORMAT "%" PRIu64 1121 1122 if (_launcher_debug) { 1123 printf("pages: " UINT64_FORMAT 1124 " page_size: " UINT64_FORMAT 1125 " physical memory: " UINT64_FORMAT " (%.3fGB)\n", 1126 pages, page_size, result, result / (double) GB); 1127 } 1128 return result; 1129 } 1130 1131 #if defined(__sun) && defined(__sparc) 1132 1133 /* Methods for solaris-sparc: these are easy. */ 1134 1135 /* Ask the OS how many processors there are. */ 1136 unsigned long 1137 physical_processors(void) { 1138 const unsigned long sys_processors = sysconf(_SC_NPROCESSORS_CONF); 1139 1140 if (_launcher_debug) { 1141 printf("sysconf(_SC_NPROCESSORS_CONF): %lu\n", sys_processors); 1142 } 1143 return sys_processors; 1144 } 1145 1146 /* The solaris-sparc version of the "server-class" predicate. */ 1147 jboolean 1148 solaris_sparc_ServerClassMachine(void) { 1149 jboolean result = JNI_FALSE; 1150 /* How big is a server class machine? */ 1151 const unsigned long server_processors = 2UL; 1152 const uint64_t server_memory = 2UL * GB; 1153 const uint64_t actual_memory = physical_memory(); 1154 1155 /* Is this a server class machine? */ 1156 if (actual_memory >= server_memory) { 1157 const unsigned long actual_processors = physical_processors(); 1158 if (actual_processors >= server_processors) { 1159 result = JNI_TRUE; 1160 } 1161 } 1162 if (_launcher_debug) { 1163 printf("solaris_" ARCH "_ServerClassMachine: %s\n", 1164 (result == JNI_TRUE ? "JNI_TRUE" : "JNI_FALSE")); 1165 } 1166 return result; 1167 } 1168 1169 #endif /* __sun && __sparc */ 1170 1171 #if defined(__sun) && defined(i586) 1172 1173 /* 1174 * A utility method for asking the CPU about itself. 1175 * There's a corresponding version of linux-i586 1176 * because the compilers are different. 1177 */ 1178 void 1179 get_cpuid(uint32_t arg, 1180 uint32_t* eaxp, 1181 uint32_t* ebxp, 1182 uint32_t* ecxp, 1183 uint32_t* edxp) { 1184 #ifdef _LP64 1185 asm( 1186 /* rbx is a callee-saved register */ 1187 " movq %rbx, %r11 \n" 1188 /* rdx and rcx are 3rd and 4th argument registers */ 1189 " movq %rdx, %r10 \n" 1190 " movq %rcx, %r9 \n" 1191 " movl %edi, %eax \n" 1192 " cpuid \n" 1193 " movl %eax, (%rsi)\n" 1194 " movl %ebx, (%r10)\n" 1195 " movl %ecx, (%r9) \n" 1196 " movl %edx, (%r8) \n" 1197 /* Restore rbx */ 1198 " movq %r11, %rbx"); 1199 #else 1200 /* EBX is a callee-saved register */ 1201 asm(" pushl %ebx"); 1202 /* Need ESI for storing through arguments */ 1203 asm(" pushl %esi"); 1204 asm(" movl 8(%ebp), %eax \n" 1205 " cpuid \n" 1206 " movl 12(%ebp), %esi \n" 1207 " movl %eax, (%esi) \n" 1208 " movl 16(%ebp), %esi \n" 1209 " movl %ebx, (%esi) \n" 1210 " movl 20(%ebp), %esi \n" 1211 " movl %ecx, (%esi) \n" 1212 " movl 24(%ebp), %esi \n" 1213 " movl %edx, (%esi) "); 1214 /* Restore ESI and EBX */ 1215 asm(" popl %esi"); 1216 /* Restore EBX */ 1217 asm(" popl %ebx"); 1218 #endif 1219 } 1220 1221 #endif /* __sun && i586 */ 1222 1223 #if defined(__linux__) && defined(i586) 1224 1225 /* 1226 * A utility method for asking the CPU about itself. 1227 * There's a corresponding version of solaris-i586 1228 * because the compilers are different. 1229 */ 1230 void 1231 get_cpuid(uint32_t arg, 1232 uint32_t* eaxp, 1233 uint32_t* ebxp, 1234 uint32_t* ecxp, 1235 uint32_t* edxp) { 1236 #ifdef _LP64 1237 __asm__ volatile (/* Instructions */ 1238 " movl %4, %%eax \n" 1239 " cpuid \n" 1240 " movl %%eax, (%0)\n" 1241 " movl %%ebx, (%1)\n" 1242 " movl %%ecx, (%2)\n" 1243 " movl %%edx, (%3)\n" 1244 : /* Outputs */ 1245 : /* Inputs */ 1246 "r" (eaxp), 1247 "r" (ebxp), 1248 "r" (ecxp), 1249 "r" (edxp), 1250 "r" (arg) 1251 : /* Clobbers */ 1252 "%rax", "%rbx", "%rcx", "%rdx", "memory" 1253 ); 1254 #else 1255 uint32_t value_of_eax = 0; 1256 uint32_t value_of_ebx = 0; 1257 uint32_t value_of_ecx = 0; 1258 uint32_t value_of_edx = 0; 1259 __asm__ volatile (/* Instructions */ 1260 /* ebx is callee-save, so push it */ 1261 /* even though it's in the clobbers section */ 1262 " pushl %%ebx \n" 1263 " movl %4, %%eax \n" 1264 " cpuid \n" 1265 " movl %%eax, %0 \n" 1266 " movl %%ebx, %1 \n" 1267 " movl %%ecx, %2 \n" 1268 " movl %%edx, %3 \n" 1269 /* restore ebx */ 1270 " popl %%ebx \n" 1271 1272 : /* Outputs */ 1273 "=m" (value_of_eax), 1274 "=m" (value_of_ebx), 1275 "=m" (value_of_ecx), 1276 "=m" (value_of_edx) 1277 : /* Inputs */ 1278 "m" (arg) 1279 : /* Clobbers */ 1280 "%eax", "%ebx", "%ecx", "%edx" 1281 ); 1282 *eaxp = value_of_eax; 1283 *ebxp = value_of_ebx; 1284 *ecxp = value_of_ecx; 1285 *edxp = value_of_edx; 1286 #endif 1287 } 1288 1289 #endif /* __linux__ && i586 */ 1290 1291 #ifdef i586 1292 /* 1293 * Routines shared by solaris-i586 and linux-i586. 1294 */ 1295 1296 enum HyperThreadingSupport_enum { 1297 hts_supported = 1, 1298 hts_too_soon_to_tell = 0, 1299 hts_not_supported = -1, 1300 hts_not_pentium4 = -2, 1301 hts_not_intel = -3 1302 }; 1303 typedef enum HyperThreadingSupport_enum HyperThreadingSupport; 1304 1305 /* Determine if hyperthreading is supported */ 1306 HyperThreadingSupport 1307 hyperthreading_support(void) { 1308 HyperThreadingSupport result = hts_too_soon_to_tell; 1309 /* Bits 11 through 8 is family processor id */ 1310 # define FAMILY_ID_SHIFT 8 1311 # define FAMILY_ID_MASK 0xf 1312 /* Bits 23 through 20 is extended family processor id */ 1313 # define EXT_FAMILY_ID_SHIFT 20 1314 # define EXT_FAMILY_ID_MASK 0xf 1315 /* Pentium 4 family processor id */ 1316 # define PENTIUM4_FAMILY_ID 0xf 1317 /* Bit 28 indicates Hyper-Threading Technology support */ 1318 # define HT_BIT_SHIFT 28 1319 # define HT_BIT_MASK 1 1320 uint32_t vendor_id[3] = { 0U, 0U, 0U }; 1321 uint32_t value_of_eax = 0U; 1322 uint32_t value_of_edx = 0U; 1323 uint32_t dummy = 0U; 1324 1325 /* Yes, this is supposed to be [0], [2], [1] */ 1326 get_cpuid(0, &dummy, &vendor_id[0], &vendor_id[2], &vendor_id[1]); 1327 if (_launcher_debug) { 1328 printf("vendor: %c %c %c %c %c %c %c %c %c %c %c %c \n", 1329 ((vendor_id[0] >> 0) & 0xff), 1330 ((vendor_id[0] >> 8) & 0xff), 1331 ((vendor_id[0] >> 16) & 0xff), 1332 ((vendor_id[0] >> 24) & 0xff), 1333 ((vendor_id[1] >> 0) & 0xff), 1334 ((vendor_id[1] >> 8) & 0xff), 1335 ((vendor_id[1] >> 16) & 0xff), 1336 ((vendor_id[1] >> 24) & 0xff), 1337 ((vendor_id[2] >> 0) & 0xff), 1338 ((vendor_id[2] >> 8) & 0xff), 1339 ((vendor_id[2] >> 16) & 0xff), 1340 ((vendor_id[2] >> 24) & 0xff)); 1341 } 1342 get_cpuid(1, &value_of_eax, &dummy, &dummy, &value_of_edx); 1343 if (_launcher_debug) { 1344 printf("value_of_eax: 0x%x value_of_edx: 0x%x\n", 1345 value_of_eax, value_of_edx); 1346 } 1347 if ((((value_of_eax >> FAMILY_ID_SHIFT) & FAMILY_ID_MASK) == PENTIUM4_FAMILY_ID) || 1348 (((value_of_eax >> EXT_FAMILY_ID_SHIFT) & EXT_FAMILY_ID_MASK) != 0)) { 1349 if ((((vendor_id[0] >> 0) & 0xff) == 'G') && 1350 (((vendor_id[0] >> 8) & 0xff) == 'e') && 1351 (((vendor_id[0] >> 16) & 0xff) == 'n') && 1352 (((vendor_id[0] >> 24) & 0xff) == 'u') && 1353 (((vendor_id[1] >> 0) & 0xff) == 'i') && 1354 (((vendor_id[1] >> 8) & 0xff) == 'n') && 1355 (((vendor_id[1] >> 16) & 0xff) == 'e') && 1356 (((vendor_id[1] >> 24) & 0xff) == 'I') && 1357 (((vendor_id[2] >> 0) & 0xff) == 'n') && 1358 (((vendor_id[2] >> 8) & 0xff) == 't') && 1359 (((vendor_id[2] >> 16) & 0xff) == 'e') && 1360 (((vendor_id[2] >> 24) & 0xff) == 'l')) { 1361 if (((value_of_edx >> HT_BIT_SHIFT) & HT_BIT_MASK) == HT_BIT_MASK) { 1362 if (_launcher_debug) { 1363 printf("Hyperthreading supported\n"); 1364 } 1365 result = hts_supported; 1366 } else { 1367 if (_launcher_debug) { 1368 printf("Hyperthreading not supported\n"); 1369 } 1370 result = hts_not_supported; 1371 } 1372 } else { 1373 if (_launcher_debug) { 1374 printf("Not GenuineIntel\n"); 1375 } 1376 result = hts_not_intel; 1377 } 1378 } else { 1379 if (_launcher_debug) { 1380 printf("not Pentium 4 or extended\n"); 1381 } 1382 result = hts_not_pentium4; 1383 } 1384 return result; 1385 } 1386 1387 /* Determine how many logical processors there are per CPU */ 1388 unsigned int 1389 logical_processors_per_package(void) { 1390 /* 1391 * After CPUID with EAX==1, register EBX bits 23 through 16 1392 * indicate the number of logical processors per package 1393 */ 1394 # define NUM_LOGICAL_SHIFT 16 1395 # define NUM_LOGICAL_MASK 0xff 1396 unsigned int result = 1U; 1397 const HyperThreadingSupport hyperthreading = hyperthreading_support(); 1398 1399 if (hyperthreading == hts_supported) { 1400 uint32_t value_of_ebx = 0U; 1401 uint32_t dummy = 0U; 1402 1403 get_cpuid(1, &dummy, &value_of_ebx, &dummy, &dummy); 1404 result = (value_of_ebx >> NUM_LOGICAL_SHIFT) & NUM_LOGICAL_MASK; 1405 if (_launcher_debug) { 1406 printf("logical processors per package: %u\n", result); 1407 } 1408 } 1409 return result; 1410 } 1411 1412 /* Compute the number of physical processors, not logical processors */ 1413 unsigned long 1414 physical_processors(void) { 1415 const long sys_processors = sysconf(_SC_NPROCESSORS_CONF); 1416 unsigned long result = sys_processors; 1417 1418 if (_launcher_debug) { 1419 printf("sysconf(_SC_NPROCESSORS_CONF): %lu\n", sys_processors); 1420 } 1421 if (sys_processors > 1) { 1422 unsigned int logical_processors = logical_processors_per_package(); 1423 if (logical_processors > 1) { 1424 result = (unsigned long) sys_processors / logical_processors; 1425 } 1426 } 1427 if (_launcher_debug) { 1428 printf("physical processors: %lu\n", result); 1429 } 1430 return result; 1431 } 1432 1433 #endif /* i586 */ 1434 1435 #if defined(__sun) && defined(i586) 1436 1437 /* The definition of a server-class machine for solaris-i586/amd64 */ 1438 jboolean 1439 solaris_i586_ServerClassMachine(void) { 1440 jboolean result = JNI_FALSE; 1441 /* How big is a server class machine? */ 1442 const unsigned long server_processors = 2UL; 1443 const uint64_t server_memory = 2UL * GB; 1444 /* 1445 * We seem not to get our full complement of memory. 1446 * We allow some part (1/8?) of the memory to be "missing", 1447 * based on the sizes of DIMMs, and maybe graphics cards. 1448 */ 1449 const uint64_t missing_memory = 256UL * MB; 1450 const uint64_t actual_memory = physical_memory(); 1451 1452 /* Is this a server class machine? */ 1453 if (actual_memory >= (server_memory - missing_memory)) { 1454 const unsigned long actual_processors = physical_processors(); 1455 if (actual_processors >= server_processors) { 1456 result = JNI_TRUE; 1457 } 1458 } 1459 if (_launcher_debug) { 1460 printf("solaris_" ARCH "_ServerClassMachine: %s\n", 1461 (result == JNI_TRUE ? "true" : "false")); 1462 } 1463 return result; 1464 } 1465 1466 #endif /* __sun && i586 */ 1467 1468 #if defined(__linux__) && defined(i586) 1469 1470 /* The definition of a server-class machine for linux-i586 */ 1471 jboolean 1472 linux_i586_ServerClassMachine(void) { 1473 jboolean result = JNI_FALSE; 1474 /* How big is a server class machine? */ 1475 const unsigned long server_processors = 2UL; 1476 const uint64_t server_memory = 2UL * GB; 1477 /* 1478 * We seem not to get our full complement of memory. 1479 * We allow some part (1/8?) of the memory to be "missing", 1480 * based on the sizes of DIMMs, and maybe graphics cards. 1481 */ 1482 const uint64_t missing_memory = 256UL * MB; 1483 const uint64_t actual_memory = physical_memory(); 1484 1485 /* Is this a server class machine? */ 1486 if (actual_memory >= (server_memory - missing_memory)) { 1487 const unsigned long actual_processors = physical_processors(); 1488 if (actual_processors >= server_processors) { 1489 result = JNI_TRUE; 1490 } 1491 } 1492 if (_launcher_debug) { 1493 printf("linux_" ARCH "_ServerClassMachine: %s\n", 1494 (result == JNI_TRUE ? "true" : "false")); 1495 } 1496 return result; 1497 } 1498 1499 #endif /* __linux__ && i586 */ 1500 1501 /* Dispatch to the platform-specific definition of "server-class" */ 1502 jboolean 1503 ServerClassMachine(void) { 1504 jboolean result = JNI_FALSE; 1505 #if defined(__sun) && defined(__sparc) 1506 result = solaris_sparc_ServerClassMachine(); 1507 #elif defined(__sun) && defined(i586) 1508 result = solaris_i586_ServerClassMachine(); 1509 #elif defined(__linux__) && defined(i586) 1510 result = linux_i586_ServerClassMachine(); 1511 #else 1512 if (_launcher_debug) { 1513 printf("ServerClassMachine: returns default value of %s\n", 1514 (result == JNI_TRUE ? "true" : "false")); 1515 } 1516 #endif 1517 return result; 1518 } 1519 1520 #endif /* ifndef GAMMA */ 1521 1522 #ifndef GAMMA /* gamma launcher does not choose JDK/JRE/JVM */ 1523 1524 /* 1525 * Since using the file system as a registry is a bit risky, perform 1526 * additional sanity checks on the identified directory to validate 1527 * it as a valid jre/sdk. 1528 * 1529 * Return 0 if the tests fail; otherwise return non-zero (true). 1530 * 1531 * Note that checking for anything more than the existence of an 1532 * executable object at bin/java relative to the path being checked 1533 * will break the regression tests. 1534 */ 1535 static int 1536 CheckSanity(char *path, char *dir) 1537 { 1538 char buffer[PATH_MAX]; 1539 1540 if (strlen(path) + strlen(dir) + 11 > PATH_MAX) 1541 return (0); /* Silently reject "impossibly" long paths */ 1542 1543 (void)strcat(strcat(strcat(strcpy(buffer, path), "/"), dir), "/bin/java"); 1544 return ((access(buffer, X_OK) == 0) ? 1 : 0); 1545 } 1546 1547 /* 1548 * Determine if there is an acceptable JRE in the directory dirname. 1549 * Upon locating the "best" one, return a fully qualified path to 1550 * it. "Best" is defined as the most advanced JRE meeting the 1551 * constraints contained in the manifest_info. If no JRE in this 1552 * directory meets the constraints, return NULL. 1553 * 1554 * Note that we don't check for errors in reading the directory 1555 * (which would be done by checking errno). This is because it 1556 * doesn't matter if we get an error reading the directory, or 1557 * we just don't find anything interesting in the directory. We 1558 * just return NULL in either case. 1559 * 1560 * The historical names of j2sdk and j2re were changed to jdk and 1561 * jre respecively as part of the 1.5 rebranding effort. Since the 1562 * former names are legacy on Linux, they must be recognized for 1563 * all time. Fortunately, this is a minor cost. 1564 */ 1565 static char 1566 *ProcessDir(manifest_info *info, char *dirname) 1567 { 1568 DIR *dirp; 1569 struct dirent *dp; 1570 char *best = NULL; 1571 int offset; 1572 int best_offset = 0; 1573 char *ret_str = NULL; 1574 char buffer[PATH_MAX]; 1575 1576 if ((dirp = opendir(dirname)) == NULL) 1577 return (NULL); 1578 1579 do { 1580 if ((dp = readdir(dirp)) != NULL) { 1581 offset = 0; 1582 if ((strncmp(dp->d_name, "jre", 3) == 0) || 1583 (strncmp(dp->d_name, "jdk", 3) == 0)) 1584 offset = 3; 1585 else if (strncmp(dp->d_name, "j2re", 4) == 0) 1586 offset = 4; 1587 else if (strncmp(dp->d_name, "j2sdk", 5) == 0) 1588 offset = 5; 1589 if (offset > 0) { 1590 if ((acceptable_release(dp->d_name + offset, 1591 info->jre_version)) && CheckSanity(dirname, dp->d_name)) 1592 if ((best == NULL) || (exact_version_id( 1593 dp->d_name + offset, best + best_offset) > 0)) { 1594 if (best != NULL) 1595 free(best); 1596 best = strdup(dp->d_name); 1597 best_offset = offset; 1598 } 1599 } 1600 } 1601 } while (dp != NULL); 1602 (void) closedir(dirp); 1603 if (best == NULL) 1604 return (NULL); 1605 else { 1606 ret_str = MemAlloc(strlen(dirname) + strlen(best) + 2); 1607 ret_str = strcat(strcat(strcpy(ret_str, dirname), "/"), best); 1608 free(best); 1609 return (ret_str); 1610 } 1611 } 1612 1613 /* 1614 * This is the global entry point. It examines the host for the optimal 1615 * JRE to be used by scanning a set of directories. The set of directories 1616 * is platform dependent and can be overridden by the environment 1617 * variable JAVA_VERSION_PATH. 1618 * 1619 * This routine itself simply determines the set of appropriate 1620 * directories before passing control onto ProcessDir(). 1621 */ 1622 char* 1623 LocateJRE(manifest_info* info) 1624 { 1625 char *path; 1626 char *home; 1627 char *target = NULL; 1628 char *dp; 1629 char *cp; 1630 1631 /* 1632 * Start by getting JAVA_VERSION_PATH 1633 */ 1634 if (info->jre_restrict_search) 1635 path = strdup(system_dir); 1636 else if ((path = getenv("JAVA_VERSION_PATH")) != NULL) 1637 path = strdup(path); 1638 else 1639 if ((home = getenv("HOME")) != NULL) { 1640 path = (char *)MemAlloc(strlen(home) + 13); 1641 path = strcat(strcat(strcat(strcpy(path, home), 1642 user_dir), ":"), system_dir); 1643 } else 1644 path = strdup(system_dir); 1645 1646 /* 1647 * Step through each directory on the path. Terminate the scan with 1648 * the first directory with an acceptable JRE. 1649 */ 1650 cp = dp = path; 1651 while (dp != NULL) { 1652 cp = strchr(dp, (int)':'); 1653 if (cp != NULL) 1654 *cp = (char)NULL; 1655 if ((target = ProcessDir(info, dp)) != NULL) 1656 break; 1657 dp = cp; 1658 if (dp != NULL) 1659 dp++; 1660 } 1661 free(path); 1662 return (target); 1663 } 1664 1665 /* 1666 * Given a path to a jre to execute, this routine checks if this process 1667 * is indeed that jre. If not, it exec's that jre. 1668 * 1669 * We want to actually check the paths rather than just the version string 1670 * built into the executable, so that given version specification (and 1671 * JAVA_VERSION_PATH) will yield the exact same Java environment, regardless 1672 * of the version of the arbitrary launcher we start with. 1673 */ 1674 void 1675 ExecJRE(char *jre, char **argv) 1676 { 1677 char wanted[PATH_MAX]; 1678 char *execname; 1679 char *progname; 1680 1681 /* 1682 * Resolve the real path to the directory containing the selected JRE. 1683 */ 1684 if (realpath(jre, wanted) == NULL) { 1685 fprintf(stderr, "Unable to resolve %s\n", jre); 1686 exit(1); 1687 } 1688 1689 /* 1690 * Resolve the real path to the currently running launcher. 1691 */ 1692 execname = SetExecname(argv); 1693 if (execname == NULL) { 1694 fprintf(stderr, "Unable to resolve current executable\n"); 1695 exit(1); 1696 } 1697 1698 /* 1699 * If the path to the selected JRE directory is a match to the initial 1700 * portion of the path to the currently executing JRE, we have a winner! 1701 * If so, just return. 1702 */ 1703 if (strncmp(wanted, execname, strlen(wanted)) == 0) 1704 return; /* I am the droid you were looking for */ 1705 1706 /* 1707 * If this isn't the selected version, exec the selected version. 1708 */ 1709 #ifdef JAVA_ARGS /* javac, jar and friends. */ 1710 progname = "java"; 1711 #else /* java, oldjava, javaw and friends */ 1712 #ifdef PROGNAME 1713 progname = PROGNAME; 1714 #else 1715 progname = *argv; 1716 if ((s = strrchr(progname, FILE_SEPARATOR)) != 0) { 1717 progname = s + 1; 1718 } 1719 #endif /* PROGNAME */ 1720 #endif /* JAVA_ARGS */ 1721 1722 /* 1723 * This should never happen (because of the selection code in SelectJRE), 1724 * but check for "impossibly" long path names just because buffer overruns 1725 * can be so deadly. 1726 */ 1727 if (strlen(wanted) + strlen(progname) + 6 > PATH_MAX) { 1728 fprintf(stderr, "Path length exceeds maximum length (PATH_MAX)\n"); 1729 exit(1); 1730 } 1731 1732 /* 1733 * Construct the path and exec it. 1734 */ 1735 (void)strcat(strcat(wanted, "/bin/"), progname); 1736 argv[0] = progname; 1737 if (_launcher_debug) { 1738 int i; 1739 printf("execv(\"%s\"", wanted); 1740 for (i = 0; argv[i] != NULL; i++) 1741 printf(", \"%s\"", argv[i]); 1742 printf(")\n"); 1743 } 1744 execv(wanted, argv); 1745 fprintf(stderr, "Exec of %s failed\n", wanted); 1746 exit(1); 1747 } 1748 1749 #endif /* ifndef GAMMA */ 1750 1751 /* 1752 * "Borrowed" from Solaris 10 where the unsetenv() function is being added 1753 * to libc thanks to SUSv3 (Standard Unix Specification, version 3). As 1754 * such, in the fullness of time this will appear in libc on all relevant 1755 * Solaris/Linux platforms and maybe even the Windows platform. At that 1756 * time, this stub can be removed. 1757 * 1758 * This implementation removes the environment locking for multithreaded 1759 * applications. (We don't have access to these mutexes within libc and 1760 * the launcher isn't multithreaded.) Note that what remains is platform 1761 * independent, because it only relies on attributes that a POSIX environment 1762 * defines. 1763 * 1764 * Returns 0 on success, -1 on failure. 1765 * 1766 * Also removed was the setting of errno. The only value of errno set 1767 * was EINVAL ("Invalid Argument"). 1768 */ 1769 1770 /* 1771 * s1(environ) is name=value 1772 * s2(name) is name(not the form of name=value). 1773 * if names match, return value of 1, else return 0 1774 */ 1775 static int 1776 match_noeq(const char *s1, const char *s2) 1777 { 1778 while (*s1 == *s2++) { 1779 if (*s1++ == '=') 1780 return (1); 1781 } 1782 if (*s1 == '=' && s2[-1] == '\0') 1783 return (1); 1784 return (0); 1785 } 1786 1787 /* 1788 * added for SUSv3 standard 1789 * 1790 * Delete entry from environ. 1791 * Do not free() memory! Other threads may be using it. 1792 * Keep it around forever. 1793 */ 1794 static int 1795 borrowed_unsetenv(const char *name) 1796 { 1797 long idx; /* index into environ */ 1798 1799 if (name == NULL || *name == '\0' || 1800 strchr(name, '=') != NULL) { 1801 return (-1); 1802 } 1803 1804 for (idx = 0; environ[idx] != NULL; idx++) { 1805 if (match_noeq(environ[idx], name)) 1806 break; 1807 } 1808 if (environ[idx] == NULL) { 1809 /* name not found but still a success */ 1810 return (0); 1811 } 1812 /* squeeze up one entry */ 1813 do { 1814 environ[idx] = environ[idx+1]; 1815 } while (environ[++idx] != NULL); 1816 1817 return (0); 1818 } 1819 /* --- End of "borrowed" code --- */ 1820 1821 /* 1822 * Wrapper for unsetenv() function. 1823 */ 1824 int 1825 UnsetEnv(char *name) 1826 { 1827 return(borrowed_unsetenv(name)); 1828 } 1829 1830 /* 1831 * The implementation for finding classes from the bootstrap 1832 * class loader, refer to java.h 1833 */ 1834 static FindClassFromBootLoader_t *findBootClass = NULL; 1835 1836 jclass 1837 FindBootStrapClass(JNIEnv *env, const char* classname) 1838 { 1839 if (findBootClass == NULL) { 1840 findBootClass = (FindClassFromBootLoader_t *)dlsym(RTLD_DEFAULT, 1841 "JVM_FindClassFromBootLoader"); 1842 if (findBootClass == NULL) { 1843 fprintf(stderr, "Error: could not load method JVM_FindClassFromBootLoader"); 1844 return NULL; 1845 } 1846 } 1847 return findBootClass(env, classname, JNI_FALSE); 1848 } 1849