1 /* 2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 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 <limits.h> 35 #include <sys/stat.h> 36 #include <unistd.h> 37 #include <sys/types.h> 38 39 #ifndef GAMMA 40 #include "manifest_info.h" 41 #include "version_comp.h" 42 #endif 43 44 #ifdef __linux__ 45 #include <pthread.h> 46 #else 47 #include <thread.h> 48 #endif 49 50 #define JVM_DLL "libjvm.so" 51 #define JAVA_DLL "libjava.so" 52 53 #ifndef GAMMA /* launcher.make defines ARCH */ 54 /* 55 * If a processor / os combination has the ability to run binaries of 56 * two data models and cohabitation of jre/jdk bits with both data 57 * models is supported, then DUAL_MODE is defined. When DUAL_MODE is 58 * defined, the architecture names for the narrow and wide version of 59 * the architecture are defined in LIBARCH64NAME and LIBARCH32NAME. Currently 60 * only Solaris on sparc/sparcv9 and i586/amd64 is DUAL_MODE; linux 61 * i586/amd64 could be defined as DUAL_MODE but that is not the 62 * current policy. 63 */ 64 65 #ifndef LIBARCHNAME 66 # error "The macro LIBARCHNAME was not defined on the compile line" 67 #endif 68 69 #ifdef __sun 70 # define DUAL_MODE 71 # ifndef LIBARCH32NAME 72 # error "The macro LIBARCH32NAME was not defined on the compile line" 73 # endif 74 # ifndef LIBARCH64NAME 75 # error "The macro LIBARCH64NAME was not defined on the compile line" 76 # endif 77 # include <sys/systeminfo.h> 78 # include <sys/elf.h> 79 # include <stdio.h> 80 #endif 81 82 #endif /* ifndef GAMMA */ 83 84 /* pointer to environment */ 85 extern char **environ; 86 87 #ifndef GAMMA 88 /* 89 * A collection of useful strings. One should think of these as #define 90 * entries, but actual strings can be more efficient (with many compilers). 91 */ 92 #ifdef __linux__ 93 static const char *system_dir = "/usr/java"; 94 static const char *user_dir = "/java"; 95 #else /* Solaris */ 96 static const char *system_dir = "/usr/jdk"; 97 static const char *user_dir = "/jdk"; 98 #endif 99 100 #endif /* ifndef GAMMA */ 101 102 /* 103 * Flowchart of launcher execs and options processing on unix 104 * 105 * The selection of the proper vm shared library to open depends on 106 * several classes of command line options, including vm "flavor" 107 * options (-client, -server) and the data model options, -d32 and 108 * -d64, as well as a version specification which may have come from 109 * the command line or from the manifest of an executable jar file. 110 * The vm selection options are not passed to the running 111 * virtual machine; they must be screened out by the launcher. 112 * 113 * The version specification (if any) is processed first by the 114 * platform independent routine SelectVersion. This may result in 115 * the exec of the specified launcher version. 116 * 117 * Typically, the launcher execs at least once to ensure a suitable 118 * LD_LIBRARY_PATH is in effect for the process. The first exec 119 * screens out all the data model options; leaving the choice of data 120 * model implicit in the binary selected to run. However, in case no 121 * exec is done, the data model options are screened out before the vm 122 * is invoked. 123 * 124 * incoming argv ------------------------------ 125 * | | 126 * \|/ | 127 * CheckJVMType | 128 * (removes -client, -server, etc.) | 129 * \|/ 130 * CreateExecutionEnvironment 131 * (removes -d32 and -d64, 132 * determines desired data model, 133 * sets up LD_LIBRARY_PATH, 134 * and exec's) 135 * | 136 * -------------------------------------------- 137 * | 138 * \|/ 139 * exec child 1 incoming argv ----------------- 140 * | | 141 * \|/ | 142 * CheckJVMType | 143 * (removes -client, -server, etc.) | 144 * | \|/ 145 * | CreateExecutionEnvironment 146 * | (verifies desired data model 147 * | is running and acceptable 148 * | LD_LIBRARY_PATH; 149 * | no-op in child) 150 * | 151 * \|/ 152 * TranslateDashJArgs... 153 * (Prepare to pass args to vm) 154 * | 155 * | 156 * | 157 * \|/ 158 * ParseArguments 159 * (ignores -d32 and -d64, 160 * processes version options, 161 * creates argument list for vm, 162 * etc.) 163 * 164 */ 165 166 static char *SetExecname(char **argv); 167 static char * GetExecname(); 168 static jboolean GetJVMPath(const char *jrepath, const char *jvmtype, 169 char *jvmpath, jint jvmpathsize, char * arch); 170 static jboolean GetJREPath(char *path, jint pathsize, char * arch, jboolean speculative); 171 172 #ifndef GAMMA 173 const char * 174 GetArch() 175 { 176 return LIBARCHNAME; 177 } 178 #endif /* ifndef GAMMA */ 179 180 void 181 CreateExecutionEnvironment(int *_argcp, 182 char ***_argvp, 183 char jrepath[], 184 jint so_jrepath, 185 char jvmpath[], 186 jint so_jvmpath, 187 char **original_argv) { 188 /* 189 * First, determine if we are running the desired data model. If we 190 * are running the desired data model, all the error messages 191 * associated with calling GetJREPath, ReadKnownVMs, etc. should be 192 * output. However, if we are not running the desired data model, 193 * some of the errors should be suppressed since it is more 194 * informative to issue an error message based on whether or not the 195 * os/processor combination has dual mode capabilities. 196 */ 197 198 char *execname = NULL; 199 int original_argc = *_argcp; 200 jboolean jvmpathExists; 201 202 /* Compute the name of the executable */ 203 execname = SetExecname(*_argvp); 204 205 #ifndef GAMMA 206 /* Set the LD_LIBRARY_PATH environment variable, check data model 207 flags, and exec process, if needed */ 208 { 209 char *arch = (char *)GetArch(); /* like sparc or sparcv9 */ 210 char * jvmtype = NULL; 211 int argc = *_argcp; 212 char **argv = original_argv; 213 214 char *runpath = NULL; /* existing effective LD_LIBRARY_PATH 215 setting */ 216 217 int running = /* What data model is being ILP32 => 218 32 bit vm; LP64 => 64 bit vm */ 219 #ifdef _LP64 220 64; 221 #else 222 32; 223 #endif 224 225 int wanted = running; /* What data mode is being 226 asked for? Current model is 227 fine unless another model 228 is asked for */ 229 230 char* new_runpath = NULL; /* desired new LD_LIBRARY_PATH string */ 231 char* newpath = NULL; /* path on new LD_LIBRARY_PATH */ 232 char* lastslash = NULL; 233 234 char** newenvp = NULL; /* current environment */ 235 236 char** newargv = NULL; 237 int newargc = 0; 238 #ifdef __sun 239 char* dmpath = NULL; /* data model specific LD_LIBRARY_PATH, 240 Solaris only */ 241 #endif 242 243 /* 244 * Starting in 1.5, all unix platforms accept the -d32 and -d64 245 * options. On platforms where only one data-model is supported 246 * (e.g. ia-64 Linux), using the flag for the other data model is 247 * an error and will terminate the program. 248 */ 249 250 { /* open new scope to declare local variables */ 251 int i; 252 253 newargv = (char **)JLI_MemAlloc((argc+1) * sizeof(*newargv)); 254 newargv[newargc++] = argv[0]; 255 256 /* scan for data model arguments and remove from argument list; 257 last occurrence determines desired data model */ 258 for (i=1; i < argc; i++) { 259 260 if (strcmp(argv[i], "-J-d64") == 0 || strcmp(argv[i], "-d64") == 0) { 261 wanted = 64; 262 continue; 263 } 264 if (strcmp(argv[i], "-J-d32") == 0 || strcmp(argv[i], "-d32") == 0) { 265 wanted = 32; 266 continue; 267 } 268 newargv[newargc++] = argv[i]; 269 270 #ifdef JAVA_ARGS 271 if (argv[i][0] != '-') 272 continue; 273 #else 274 if (strcmp(argv[i], "-classpath") == 0 || strcmp(argv[i], "-cp") == 0) { 275 i++; 276 if (i >= argc) break; 277 newargv[newargc++] = argv[i]; 278 continue; 279 } 280 if (argv[i][0] != '-') { i++; break; } 281 #endif 282 } 283 284 /* copy rest of args [i .. argc) */ 285 while (i < argc) { 286 newargv[newargc++] = argv[i++]; 287 } 288 newargv[newargc] = NULL; 289 290 /* 291 * newargv has all proper arguments here 292 */ 293 294 argc = newargc; 295 argv = newargv; 296 } 297 298 /* If the data model is not changing, it is an error if the 299 jvmpath does not exist */ 300 if (wanted == running) { 301 /* Find out where the JRE is that we will be using. */ 302 if (!GetJREPath(jrepath, so_jrepath, arch, JNI_FALSE) ) { 303 fprintf(stderr, "Error: could not find Java 2 Runtime Environment.\n"); 304 exit(2); 305 } 306 307 /* Find the specified JVM type */ 308 if (ReadKnownVMs(jrepath, arch, JNI_FALSE) < 1) { 309 fprintf(stderr, "Error: no known VMs. (check for corrupt jvm.cfg file)\n"); 310 exit(1); 311 } 312 313 jvmpath[0] = '\0'; 314 jvmtype = CheckJvmType(_argcp, _argvp, JNI_FALSE); 315 316 if (!GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath, arch )) { 317 fprintf(stderr, "Error: no `%s' JVM at `%s'.\n", jvmtype, jvmpath); 318 exit(4); 319 } 320 } else { /* do the same speculatively or exit */ 321 #ifdef DUAL_MODE 322 if (running != wanted) { 323 /* Find out where the JRE is that we will be using. */ 324 if (!GetJREPath(jrepath, so_jrepath, ((wanted==64)?LIBARCH64NAME:LIBARCH32NAME), JNI_TRUE)) { 325 goto EndDataModelSpeculate; 326 } 327 328 /* 329 * Read in jvm.cfg for target data model and process vm 330 * selection options. 331 */ 332 if (ReadKnownVMs(jrepath, ((wanted==64)?LIBARCH64NAME:LIBARCH32NAME), JNI_TRUE) < 1) { 333 goto EndDataModelSpeculate; 334 } 335 jvmpath[0] = '\0'; 336 jvmtype = CheckJvmType(_argcp, _argvp, JNI_TRUE); 337 /* exec child can do error checking on the existence of the path */ 338 jvmpathExists = GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath, 339 ((wanted==64)?LIBARCH64NAME:LIBARCH32NAME)); 340 341 } 342 EndDataModelSpeculate: /* give up and let other code report error message */ 343 ; 344 #else 345 fprintf(stderr, "Running a %d-bit JVM is not supported on this platform.\n", wanted); 346 exit(1); 347 #endif 348 } 349 350 /* 351 * We will set the LD_LIBRARY_PATH as follows: 352 * 353 * o $JVMPATH (directory portion only) 354 * o $JRE/lib/$LIBARCHNAME 355 * o $JRE/../lib/$LIBARCHNAME 356 * 357 * followed by the user's previous effective LD_LIBRARY_PATH, if 358 * any. 359 */ 360 361 #ifdef __sun 362 /* 363 * Starting in Solaris 7, ld.so.1 supports three LD_LIBRARY_PATH 364 * variables: 365 * 366 * 1. LD_LIBRARY_PATH -- used for 32 and 64 bit searches if 367 * data-model specific variables are not set. 368 * 369 * 2. LD_LIBRARY_PATH_64 -- overrides and replaces LD_LIBRARY_PATH 370 * for 64-bit binaries. 371 * 372 * 3. LD_LIBRARY_PATH_32 -- overrides and replaces LD_LIBRARY_PATH 373 * for 32-bit binaries. 374 * 375 * The vm uses LD_LIBRARY_PATH to set the java.library.path system 376 * property. To shield the vm from the complication of multiple 377 * LD_LIBRARY_PATH variables, if the appropriate data model 378 * specific variable is set, we will act as if LD_LIBRARY_PATH had 379 * the value of the data model specific variant and the data model 380 * specific variant will be unset. Note that the variable for the 381 * *wanted* data model must be used (if it is set), not simply the 382 * current running data model. 383 */ 384 385 switch(wanted) { 386 case 0: 387 if(running == 32) { 388 dmpath = getenv("LD_LIBRARY_PATH_32"); 389 wanted = 32; 390 } 391 else { 392 dmpath = getenv("LD_LIBRARY_PATH_64"); 393 wanted = 64; 394 } 395 break; 396 397 case 32: 398 dmpath = getenv("LD_LIBRARY_PATH_32"); 399 break; 400 401 case 64: 402 dmpath = getenv("LD_LIBRARY_PATH_64"); 403 break; 404 405 default: 406 fprintf(stderr, "Improper value at line %d.", __LINE__); 407 exit(1); /* unknown value in wanted */ 408 break; 409 } 410 411 /* 412 * If dmpath is NULL, the relevant data model specific variable is 413 * not set and normal LD_LIBRARY_PATH should be used. 414 */ 415 if( dmpath == NULL) { 416 runpath = getenv("LD_LIBRARY_PATH"); 417 } 418 else { 419 runpath = dmpath; 420 } 421 #else 422 /* 423 * If not on Solaris, assume only a single LD_LIBRARY_PATH 424 * variable. 425 */ 426 runpath = getenv("LD_LIBRARY_PATH"); 427 #endif /* __sun */ 428 429 #ifdef __linux 430 /* 431 * On linux, if a binary is running as sgid or suid, glibc sets 432 * LD_LIBRARY_PATH to the empty string for security purposes. (In 433 * contrast, on Solaris the LD_LIBRARY_PATH variable for a 434 * privileged binary does not lose its settings; but the dynamic 435 * linker does apply more scrutiny to the path.) The launcher uses 436 * the value of LD_LIBRARY_PATH to prevent an exec loop. 437 * Therefore, if we are running sgid or suid, this function's 438 * setting of LD_LIBRARY_PATH will be ineffective and we should 439 * return from the function now. Getting the right libraries to 440 * be found must be handled through other mechanisms. 441 */ 442 if((getgid() != getegid()) || (getuid() != geteuid()) ) { 443 return; 444 } 445 #endif 446 447 /* runpath contains current effective LD_LIBRARY_PATH setting */ 448 449 jvmpath = JLI_StringDup(jvmpath); 450 new_runpath = JLI_MemAlloc( ((runpath!=NULL)?strlen(runpath):0) + 451 2*strlen(jrepath) + 2*strlen(arch) + 452 strlen(jvmpath) + 52); 453 newpath = new_runpath + strlen("LD_LIBRARY_PATH="); 454 455 456 /* 457 * Create desired LD_LIBRARY_PATH value for target data model. 458 */ 459 { 460 /* remove the name of the .so from the JVM path */ 461 lastslash = strrchr(jvmpath, '/'); 462 if (lastslash) 463 *lastslash = '\0'; 464 465 466 /* jvmpath, ((running != wanted)?((wanted==64)?"/"LIBARCH64NAME:"/.."):""), */ 467 468 sprintf(new_runpath, "LD_LIBRARY_PATH=" 469 "%s:" 470 "%s/lib/%s:" 471 "%s/../lib/%s", 472 jvmpath, 473 #ifdef DUAL_MODE 474 jrepath, ((wanted==64)?LIBARCH64NAME:LIBARCH32NAME), 475 jrepath, ((wanted==64)?LIBARCH64NAME:LIBARCH32NAME) 476 #else 477 jrepath, arch, 478 jrepath, arch 479 #endif 480 ); 481 482 483 /* 484 * Check to make sure that the prefix of the current path is the 485 * desired environment variable setting. 486 */ 487 if (runpath != NULL && 488 strncmp(newpath, runpath, strlen(newpath))==0 && 489 (runpath[strlen(newpath)] == 0 || runpath[strlen(newpath)] == ':') && 490 (running == wanted) /* data model does not have to be changed */ 491 #ifdef __sun 492 && (dmpath == NULL) /* data model specific variables not set */ 493 #endif 494 ) { 495 496 return; 497 498 } 499 } 500 501 /* 502 * Place the desired environment setting onto the prefix of 503 * LD_LIBRARY_PATH. Note that this prevents any possible infinite 504 * loop of execv() because we test for the prefix, above. 505 */ 506 if (runpath != 0) { 507 strcat(new_runpath, ":"); 508 strcat(new_runpath, runpath); 509 } 510 511 if( putenv(new_runpath) != 0) { 512 exit(1); /* problem allocating memory; LD_LIBRARY_PATH not set 513 properly */ 514 } 515 516 /* 517 * Unix systems document that they look at LD_LIBRARY_PATH only 518 * once at startup, so we have to re-exec the current executable 519 * to get the changed environment variable to have an effect. 520 */ 521 522 #ifdef __sun 523 /* 524 * If dmpath is not NULL, remove the data model specific string 525 * in the environment for the exec'ed child. 526 */ 527 528 if( dmpath != NULL) 529 (void)UnsetEnv((wanted==32)?"LD_LIBRARY_PATH_32":"LD_LIBRARY_PATH_64"); 530 #endif 531 532 newenvp = environ; 533 534 { 535 char *newexec = execname; 536 #ifdef DUAL_MODE 537 /* 538 * If the data model is being changed, the path to the 539 * executable must be updated accordingly; the executable name 540 * and directory the executable resides in are separate. In the 541 * case of 32 => 64, the new bits are assumed to reside in, e.g. 542 * "olddir/LIBARCH64NAME/execname"; in the case of 64 => 32, 543 * the bits are assumed to be in "olddir/../execname". For example, 544 * 545 * olddir/sparcv9/execname 546 * olddir/amd64/execname 547 * 548 * for Solaris SPARC and Linux amd64, respectively. 549 */ 550 551 if (running != wanted) { 552 char *oldexec = strcpy(JLI_MemAlloc(strlen(execname) + 1), execname); 553 char *olddir = oldexec; 554 char *oldbase = strrchr(oldexec, '/'); 555 556 557 newexec = JLI_MemAlloc(strlen(execname) + 20); 558 *oldbase++ = 0; 559 sprintf(newexec, "%s/%s/%s", olddir, 560 ((wanted==64) ? LIBARCH64NAME : ".."), oldbase); 561 argv[0] = newexec; 562 } 563 #endif 564 565 (void)fflush(stdout); 566 (void)fflush(stderr); 567 execve(newexec, argv, newenvp); 568 perror("execve()"); 569 570 fprintf(stderr, "Error trying to exec %s.\n", newexec); 571 fprintf(stderr, "Check if file exists and permissions are set correctly.\n"); 572 573 #ifdef DUAL_MODE 574 if (running != wanted) { 575 fprintf(stderr, "Failed to start a %d-bit JVM process from a %d-bit JVM.\n", 576 wanted, running); 577 # ifdef __sun 578 579 # ifdef __sparc 580 fprintf(stderr, "Verify all necessary J2SE components have been installed.\n" ); 581 fprintf(stderr, 582 "(Solaris SPARC 64-bit components must be installed after 32-bit components.)\n" ); 583 # else 584 fprintf(stderr, "Either 64-bit processes are not supported by this platform\n"); 585 fprintf(stderr, "or the 64-bit components have not been installed.\n"); 586 # endif 587 } 588 # endif 589 #endif 590 591 } 592 593 exit(1); 594 } 595 596 #else /* ifndef GAMMA */ 597 598 /* 599 * gamma launcher is simpler in that it doesn't handle VM flavors, data 600 * model, LD_LIBRARY_PATH, etc. Assuming everything is set-up correctly 601 * all we need to do here is to return correct path names. See also 602 * GetJVMPath() and GetApplicationHome(). 603 */ 604 605 { char *arch = (char *) ARCH; /* like sparc or sparcv9 */ 606 char *p; 607 608 if (!GetJREPath(jrepath, so_jrepath, arch, JNI_FALSE) ) { 609 fprintf(stderr, "Error: could not find Java 2 Runtime Environment.\n"); 610 exit(2); 611 } 612 613 if (!GetJVMPath(jrepath, NULL, jvmpath, so_jvmpath, arch )) { 614 fprintf(stderr, "Error: no JVM at `%s'.\n", jvmpath); 615 exit(4); 616 } 617 } 618 619 #endif /* ifndef GAMMA */ 620 } 621 622 623 /* 624 * On Solaris VM choosing is done by the launcher (java.c). 625 */ 626 static jboolean 627 GetJVMPath(const char *jrepath, const char *jvmtype, 628 char *jvmpath, jint jvmpathsize, char * arch) 629 { 630 struct stat s; 631 632 #ifndef GAMMA 633 if (strchr(jvmtype, '/')) { 634 sprintf(jvmpath, "%s/" JVM_DLL, jvmtype); 635 } else { 636 sprintf(jvmpath, "%s/lib/%s/%s/" JVM_DLL, jrepath, arch, jvmtype); 637 } 638 #else 639 /* 640 * For gamma launcher, JVM is either built-in or in the same directory. 641 * Either way we return "<exe_path>/libjvm.so" where <exe_path> is the 642 * directory where gamma launcher is located. 643 */ 644 645 char *p; 646 647 snprintf(jvmpath, jvmpathsize, "%s", GetExecname()); 648 p = strrchr(jvmpath, '/'); 649 if (p) { 650 /* replace executable name with libjvm.so */ 651 snprintf(p + 1, jvmpathsize - (p + 1 - jvmpath), "%s", JVM_DLL); 652 } else { 653 /* this case shouldn't happen */ 654 snprintf(jvmpath, jvmpathsize, "%s", JVM_DLL); 655 } 656 #endif /* ifndef GAMMA */ 657 658 if (_launcher_debug) 659 printf("Does `%s' exist ... ", jvmpath); 660 661 if (stat(jvmpath, &s) == 0) { 662 if (_launcher_debug) 663 printf("yes.\n"); 664 return JNI_TRUE; 665 } else { 666 if (_launcher_debug) 667 printf("no.\n"); 668 return JNI_FALSE; 669 } 670 } 671 672 /* 673 * Find path to JRE based on .exe's location or registry settings. 674 */ 675 static jboolean 676 GetJREPath(char *path, jint pathsize, char * arch, jboolean speculative) 677 { 678 char libjava[MAXPATHLEN]; 679 680 if (GetApplicationHome(path, pathsize)) { 681 /* Is JRE co-located with the application? */ 682 sprintf(libjava, "%s/lib/%s/" JAVA_DLL, path, arch); 683 if (access(libjava, F_OK) == 0) { 684 goto found; 685 } 686 687 /* Does the app ship a private JRE in <apphome>/jre directory? */ 688 sprintf(libjava, "%s/jre/lib/%s/" JAVA_DLL, path, arch); 689 if (access(libjava, F_OK) == 0) { 690 strcat(path, "/jre"); 691 goto found; 692 } 693 } 694 695 if (!speculative) 696 fprintf(stderr, "Error: could not find " JAVA_DLL "\n"); 697 return JNI_FALSE; 698 699 found: 700 if (_launcher_debug) 701 printf("JRE path is %s\n", path); 702 return JNI_TRUE; 703 } 704 705 jboolean 706 LoadJavaVM(const char *jvmpath, InvocationFunctions *ifn) 707 { 708 #ifdef GAMMA 709 /* JVM is directly linked with gamma launcher; no dlopen() */ 710 ifn->CreateJavaVM = JNI_CreateJavaVM; 711 ifn->GetDefaultJavaVMInitArgs = JNI_GetDefaultJavaVMInitArgs; 712 return JNI_TRUE; 713 #else 714 Dl_info dlinfo; 715 void *libjvm; 716 717 if (_launcher_debug) { 718 printf("JVM path is %s\n", jvmpath); 719 } 720 721 libjvm = dlopen(jvmpath, RTLD_NOW + RTLD_GLOBAL); 722 if (libjvm == NULL) { 723 #if defined(__sparc) && !defined(_LP64) /* i.e. 32-bit sparc */ 724 FILE * fp; 725 Elf32_Ehdr elf_head; 726 int count; 727 int location; 728 729 fp = fopen(jvmpath, "r"); 730 if(fp == NULL) 731 goto error; 732 733 /* read in elf header */ 734 count = fread((void*)(&elf_head), sizeof(Elf32_Ehdr), 1, fp); 735 fclose(fp); 736 if(count < 1) 737 goto error; 738 739 /* 740 * Check for running a server vm (compiled with -xarch=v8plus) 741 * on a stock v8 processor. In this case, the machine type in 742 * the elf header would not be included the architecture list 743 * provided by the isalist command, which is turn is gotten from 744 * sysinfo. This case cannot occur on 64-bit hardware and thus 745 * does not have to be checked for in binaries with an LP64 data 746 * model. 747 */ 748 if(elf_head.e_machine == EM_SPARC32PLUS) { 749 char buf[257]; /* recommended buffer size from sysinfo man 750 page */ 751 long length; 752 char* location; 753 754 length = sysinfo(SI_ISALIST, buf, 257); 755 if(length > 0) { 756 location = strstr(buf, "sparcv8plus "); 757 if(location == NULL) { 758 fprintf(stderr, "SPARC V8 processor detected; Server compiler requires V9 or better.\n"); 759 fprintf(stderr, "Use Client compiler on V8 processors.\n"); 760 fprintf(stderr, "Could not create the Java virtual machine.\n"); 761 return JNI_FALSE; 762 } 763 } 764 } 765 #endif 766 fprintf(stderr, "dl failure on line %d", __LINE__); 767 goto error; 768 } 769 770 ifn->CreateJavaVM = (CreateJavaVM_t) 771 dlsym(libjvm, "JNI_CreateJavaVM"); 772 if (ifn->CreateJavaVM == NULL) 773 goto error; 774 775 ifn->GetDefaultJavaVMInitArgs = (GetDefaultJavaVMInitArgs_t) 776 dlsym(libjvm, "JNI_GetDefaultJavaVMInitArgs"); 777 if (ifn->GetDefaultJavaVMInitArgs == NULL) 778 goto error; 779 780 return JNI_TRUE; 781 782 error: 783 fprintf(stderr, "Error: failed %s, because %s\n", jvmpath, dlerror()); 784 return JNI_FALSE; 785 #endif /* ifndef GAMMA */ 786 } 787 788 /* 789 * If app is "/foo/bin/javac", or "/foo/bin/sparcv9/javac" then put 790 * "/foo" into buf. 791 */ 792 jboolean 793 GetApplicationHome(char *buf, jint bufsize) 794 { 795 #ifdef __linux__ 796 char *execname = GetExecname(); 797 if (execname) { 798 strncpy(buf, execname, bufsize-1); 799 buf[bufsize-1] = '\0'; 800 } else { 801 return JNI_FALSE; 802 } 803 #else 804 Dl_info dlinfo; 805 806 dladdr((void *)GetApplicationHome, &dlinfo); 807 if (realpath(dlinfo.dli_fname, buf) == NULL) { 808 fprintf(stderr, "Error: realpath(`%s') failed.\n", dlinfo.dli_fname); 809 return JNI_FALSE; 810 } 811 #endif 812 813 #ifdef GAMMA 814 { 815 /* gamma launcher uses JAVA_HOME environment variable to find JDK/JRE */ 816 char* java_home_var = getenv("JAVA_HOME"); 817 if (java_home_var == NULL) { 818 printf("JAVA_HOME must point to a valid JDK/JRE to run gamma\n"); 819 return JNI_FALSE; 820 } 821 snprintf(buf, bufsize, "%s", java_home_var); 822 } 823 #else 824 if (strrchr(buf, '/') == 0) { 825 buf[0] = '\0'; 826 return JNI_FALSE; 827 } 828 *(strrchr(buf, '/')) = '\0'; /* executable file */ 829 if (strlen(buf) < 4 || strrchr(buf, '/') == 0) { 830 buf[0] = '\0'; 831 return JNI_FALSE; 832 } 833 if (strcmp("/bin", buf + strlen(buf) - 4) != 0) 834 *(strrchr(buf, '/')) = '\0'; /* sparcv9 or amd64 */ 835 if (strlen(buf) < 4 || strcmp("/bin", buf + strlen(buf) - 4) != 0) { 836 buf[0] = '\0'; 837 return JNI_FALSE; 838 } 839 *(strrchr(buf, '/')) = '\0'; /* bin */ 840 #endif /* ifndef GAMMA */ 841 842 return JNI_TRUE; 843 } 844 845 846 /* 847 * Return true if the named program exists 848 */ 849 static int 850 ProgramExists(char *name) 851 { 852 struct stat sb; 853 if (stat(name, &sb) != 0) return 0; 854 if (S_ISDIR(sb.st_mode)) return 0; 855 return (sb.st_mode & S_IEXEC) != 0; 856 } 857 858 859 /* 860 * Find a command in a directory, returning the path. 861 */ 862 static char * 863 Resolve(char *indir, char *cmd) 864 { 865 char name[PATH_MAX + 2], *real; 866 867 if ((strlen(indir) + strlen(cmd) + 1) > PATH_MAX) return 0; 868 sprintf(name, "%s%c%s", indir, FILE_SEPARATOR, cmd); 869 if (!ProgramExists(name)) return 0; 870 real = JLI_MemAlloc(PATH_MAX + 2); 871 if (!realpath(name, real)) 872 strcpy(real, name); 873 return real; 874 } 875 876 877 /* 878 * Find a path for the executable 879 */ 880 static char * 881 FindExecName(char *program) 882 { 883 char cwdbuf[PATH_MAX+2]; 884 char *path; 885 char *tmp_path; 886 char *f; 887 char *result = NULL; 888 889 /* absolute path? */ 890 if (*program == FILE_SEPARATOR || 891 (FILE_SEPARATOR=='\\' && strrchr(program, ':'))) 892 return Resolve("", program+1); 893 894 /* relative path? */ 895 if (strrchr(program, FILE_SEPARATOR) != 0) { 896 char buf[PATH_MAX+2]; 897 return Resolve(getcwd(cwdbuf, sizeof(cwdbuf)), program); 898 } 899 900 /* from search path? */ 901 path = getenv("PATH"); 902 if (!path || !*path) path = "."; 903 tmp_path = JLI_MemAlloc(strlen(path) + 2); 904 strcpy(tmp_path, path); 905 906 for (f=tmp_path; *f && result==0; ) { 907 char *s = f; 908 while (*f && (*f != PATH_SEPARATOR)) ++f; 909 if (*f) *f++ = 0; 910 if (*s == FILE_SEPARATOR) 911 result = Resolve(s, program); 912 else { 913 /* relative path element */ 914 char dir[2*PATH_MAX]; 915 sprintf(dir, "%s%c%s", getcwd(cwdbuf, sizeof(cwdbuf)), 916 FILE_SEPARATOR, s); 917 result = Resolve(dir, program); 918 } 919 if (result != 0) break; 920 } 921 922 JLI_MemFree(tmp_path); 923 return result; 924 } 925 926 927 /* Store the name of the executable once computed */ 928 static char *execname = NULL; 929 930 /* 931 * Compute the name of the executable 932 * 933 * In order to re-exec securely we need the absolute path of the 934 * executable. On Solaris getexecname(3c) may not return an absolute 935 * path so we use dladdr to get the filename of the executable and 936 * then use realpath to derive an absolute path. From Solaris 9 937 * onwards the filename returned in DL_info structure from dladdr is 938 * an absolute pathname so technically realpath isn't required. 939 * On Linux we read the executable name from /proc/self/exe. 940 * As a fallback, and for platforms other than Solaris and Linux, 941 * we use FindExecName to compute the executable name. 942 */ 943 static char * 944 SetExecname(char **argv) 945 { 946 char* exec_path = NULL; 947 948 if (execname != NULL) /* Already determined */ 949 return (execname); 950 951 #if defined(__sun) 952 { 953 Dl_info dlinfo; 954 if (dladdr((void*)&SetExecname, &dlinfo)) { 955 char *resolved = (char*)JLI_MemAlloc(PATH_MAX+1); 956 if (resolved != NULL) { 957 exec_path = realpath(dlinfo.dli_fname, resolved); 958 if (exec_path == NULL) { 959 JLI_MemFree(resolved); 960 } 961 } 962 } 963 } 964 #elif defined(__linux__) 965 { 966 const char* self = "/proc/self/exe"; 967 char buf[PATH_MAX+1]; 968 int len = readlink(self, buf, PATH_MAX); 969 if (len >= 0) { 970 buf[len] = '\0'; /* readlink doesn't nul terminate */ 971 exec_path = JLI_StringDup(buf); 972 } 973 } 974 #else /* !__sun && !__linux */ 975 { 976 /* Not implemented */ 977 } 978 #endif 979 980 if (exec_path == NULL) { 981 exec_path = FindExecName(argv[0]); 982 } 983 execname = exec_path; 984 return exec_path; 985 } 986 987 /* 988 * Return the name of the executable. Used in java_md.c to find the JRE area. 989 */ 990 static char * 991 GetExecname() { 992 return execname; 993 } 994 995 void ReportErrorMessage(char * message, jboolean always) { 996 if (always) { 997 fprintf(stderr, "%s\n", message); 998 } 999 } 1000 1001 void ReportErrorMessage2(char * format, char * string, jboolean always) { 1002 if (always) { 1003 fprintf(stderr, format, string); 1004 fprintf(stderr, "\n"); 1005 } 1006 } 1007 1008 void ReportExceptionDescription(JNIEnv * env) { 1009 (*env)->ExceptionDescribe(env); 1010 } 1011 1012 /* 1013 * Return JNI_TRUE for an option string that has no effect but should 1014 * _not_ be passed on to the vm; return JNI_FALSE otherwise. On 1015 * Solaris SPARC, this screening needs to be done if: 1016 * 1) LD_LIBRARY_PATH does _not_ need to be reset and 1017 * 2) -d32 or -d64 is passed to a binary with a matching data model 1018 * (the exec in SetLibraryPath removes -d<n> options and points the 1019 * exec to the proper binary). When this exec is not done, these options 1020 * would end up getting passed onto the vm. 1021 */ 1022 jboolean RemovableMachineDependentOption(char * option) { 1023 /* 1024 * Unconditionally remove both -d32 and -d64 options since only 1025 * the last such options has an effect; e.g. 1026 * java -d32 -d64 -d32 -version 1027 * is equivalent to 1028 * java -d32 -version 1029 */ 1030 1031 if( (strcmp(option, "-d32") == 0 ) || 1032 (strcmp(option, "-d64") == 0 )) 1033 return JNI_TRUE; 1034 else 1035 return JNI_FALSE; 1036 } 1037 1038 void PrintMachineDependentOptions() { 1039 fprintf(stdout, 1040 " -d32 use a 32-bit data model if available\n" 1041 "\n" 1042 " -d64 use a 64-bit data model if available\n"); 1043 return; 1044 } 1045 1046 #ifndef GAMMA 1047 /* 1048 * The following methods (down to ServerClassMachine()) answer 1049 * the question about whether a machine is a "server-class" 1050 * machine. A server-class machine is loosely defined as one 1051 * with 2 or more processors and 2 gigabytes or more physical 1052 * memory. The definition of a processor is a physical package, 1053 * not a hyperthreaded chip masquerading as a multi-processor. 1054 * The definition of memory is also somewhat fuzzy, since x86 1055 * machines seem not to report all the memory in their DIMMs, we 1056 * think because of memory mapping of graphics cards, etc. 1057 * 1058 * This code is somewhat more confused with #ifdef's than we'd 1059 * like because this file is used by both Solaris and Linux 1060 * platforms, and so needs to be parameterized for SPARC and 1061 * i586 hardware. The other Linux platforms (amd64 and ia64) 1062 * don't even ask this question, because they only come with 1063 * server JVMs. */ 1064 1065 # define KB (1024UL) 1066 # define MB (1024UL * KB) 1067 # define GB (1024UL * MB) 1068 1069 /* Compute physical memory by asking the OS */ 1070 uint64_t 1071 physical_memory(void) { 1072 const uint64_t pages = (uint64_t) sysconf(_SC_PHYS_PAGES); 1073 const uint64_t page_size = (uint64_t) sysconf(_SC_PAGESIZE); 1074 const uint64_t result = pages * page_size; 1075 # define UINT64_FORMAT "%" PRIu64 1076 1077 if (_launcher_debug) { 1078 printf("pages: " UINT64_FORMAT 1079 " page_size: " UINT64_FORMAT 1080 " physical memory: " UINT64_FORMAT " (%.3fGB)\n", 1081 pages, page_size, result, result / (double) GB); 1082 } 1083 return result; 1084 } 1085 1086 #if defined(__sun) && defined(__sparc) 1087 1088 /* Methods for solaris-sparc: these are easy. */ 1089 1090 /* Ask the OS how many processors there are. */ 1091 unsigned long 1092 physical_processors(void) { 1093 const unsigned long sys_processors = sysconf(_SC_NPROCESSORS_CONF); 1094 1095 if (_launcher_debug) { 1096 printf("sysconf(_SC_NPROCESSORS_CONF): %lu\n", sys_processors); 1097 } 1098 return sys_processors; 1099 } 1100 1101 /* The solaris-sparc version of the "server-class" predicate. */ 1102 jboolean 1103 solaris_sparc_ServerClassMachine(void) { 1104 jboolean result = JNI_FALSE; 1105 /* How big is a server class machine? */ 1106 const unsigned long server_processors = 2UL; 1107 const uint64_t server_memory = 2UL * GB; 1108 const uint64_t actual_memory = physical_memory(); 1109 1110 /* Is this a server class machine? */ 1111 if (actual_memory >= server_memory) { 1112 const unsigned long actual_processors = physical_processors(); 1113 if (actual_processors >= server_processors) { 1114 result = JNI_TRUE; 1115 } 1116 } 1117 if (_launcher_debug) { 1118 printf("solaris_" LIBARCHNAME "_ServerClassMachine: %s\n", 1119 (result == JNI_TRUE ? "JNI_TRUE" : "JNI_FALSE")); 1120 } 1121 return result; 1122 } 1123 1124 #endif /* __sun && __sparc */ 1125 1126 #if defined(__sun) && defined(i586) 1127 1128 /* 1129 * A utility method for asking the CPU about itself. 1130 * There's a corresponding version of linux-i586 1131 * because the compilers are different. 1132 */ 1133 void 1134 get_cpuid(uint32_t arg, 1135 uint32_t* eaxp, 1136 uint32_t* ebxp, 1137 uint32_t* ecxp, 1138 uint32_t* edxp) { 1139 #ifdef _LP64 1140 asm( 1141 /* rbx is a callee-saved register */ 1142 " movq %rbx, %r11 \n" 1143 /* rdx and rcx are 3rd and 4th argument registers */ 1144 " movq %rdx, %r10 \n" 1145 " movq %rcx, %r9 \n" 1146 " movl %edi, %eax \n" 1147 " cpuid \n" 1148 " movl %eax, (%rsi)\n" 1149 " movl %ebx, (%r10)\n" 1150 " movl %ecx, (%r9) \n" 1151 " movl %edx, (%r8) \n" 1152 /* Restore rbx */ 1153 " movq %r11, %rbx"); 1154 #else 1155 /* EBX is a callee-saved register */ 1156 asm(" pushl %ebx"); 1157 /* Need ESI for storing through arguments */ 1158 asm(" pushl %esi"); 1159 asm(" movl 8(%ebp), %eax \n" 1160 " cpuid \n" 1161 " movl 12(%ebp), %esi \n" 1162 " movl %eax, (%esi) \n" 1163 " movl 16(%ebp), %esi \n" 1164 " movl %ebx, (%esi) \n" 1165 " movl 20(%ebp), %esi \n" 1166 " movl %ecx, (%esi) \n" 1167 " movl 24(%ebp), %esi \n" 1168 " movl %edx, (%esi) "); 1169 /* Restore ESI and EBX */ 1170 asm(" popl %esi"); 1171 /* Restore EBX */ 1172 asm(" popl %ebx"); 1173 #endif 1174 } 1175 1176 #endif /* __sun && i586 */ 1177 1178 #if defined(__linux__) && defined(i586) 1179 1180 /* 1181 * A utility method for asking the CPU about itself. 1182 * There's a corresponding version of solaris-i586 1183 * because the compilers are different. 1184 */ 1185 void 1186 get_cpuid(uint32_t arg, 1187 uint32_t* eaxp, 1188 uint32_t* ebxp, 1189 uint32_t* ecxp, 1190 uint32_t* edxp) { 1191 #ifdef _LP64 1192 __asm__ volatile (/* Instructions */ 1193 " movl %4, %%eax \n" 1194 " cpuid \n" 1195 " movl %%eax, (%0)\n" 1196 " movl %%ebx, (%1)\n" 1197 " movl %%ecx, (%2)\n" 1198 " movl %%edx, (%3)\n" 1199 : /* Outputs */ 1200 : /* Inputs */ 1201 "r" (eaxp), 1202 "r" (ebxp), 1203 "r" (ecxp), 1204 "r" (edxp), 1205 "r" (arg) 1206 : /* Clobbers */ 1207 "%rax", "%rbx", "%rcx", "%rdx", "memory" 1208 ); 1209 #else 1210 uint32_t value_of_eax = 0; 1211 uint32_t value_of_ebx = 0; 1212 uint32_t value_of_ecx = 0; 1213 uint32_t value_of_edx = 0; 1214 __asm__ volatile (/* Instructions */ 1215 /* ebx is callee-save, so push it */ 1216 " pushl %%ebx \n" 1217 " movl %4, %%eax \n" 1218 " cpuid \n" 1219 " movl %%eax, %0 \n" 1220 " movl %%ebx, %1 \n" 1221 " movl %%ecx, %2 \n" 1222 " movl %%edx, %3 \n" 1223 /* restore ebx */ 1224 " popl %%ebx \n" 1225 1226 : /* Outputs */ 1227 "=m" (value_of_eax), 1228 "=m" (value_of_ebx), 1229 "=m" (value_of_ecx), 1230 "=m" (value_of_edx) 1231 : /* Inputs */ 1232 "m" (arg) 1233 : /* Clobbers */ 1234 "%eax", "%ecx", "%edx" 1235 ); 1236 *eaxp = value_of_eax; 1237 *ebxp = value_of_ebx; 1238 *ecxp = value_of_ecx; 1239 *edxp = value_of_edx; 1240 #endif 1241 } 1242 1243 #endif /* __linux__ && i586 */ 1244 1245 #ifdef i586 1246 /* 1247 * Routines shared by solaris-i586 and linux-i586. 1248 */ 1249 1250 enum HyperThreadingSupport_enum { 1251 hts_supported = 1, 1252 hts_too_soon_to_tell = 0, 1253 hts_not_supported = -1, 1254 hts_not_pentium4 = -2, 1255 hts_not_intel = -3 1256 }; 1257 typedef enum HyperThreadingSupport_enum HyperThreadingSupport; 1258 1259 /* Determine if hyperthreading is supported */ 1260 HyperThreadingSupport 1261 hyperthreading_support(void) { 1262 HyperThreadingSupport result = hts_too_soon_to_tell; 1263 /* Bits 11 through 8 is family processor id */ 1264 # define FAMILY_ID_SHIFT 8 1265 # define FAMILY_ID_MASK 0xf 1266 /* Bits 23 through 20 is extended family processor id */ 1267 # define EXT_FAMILY_ID_SHIFT 20 1268 # define EXT_FAMILY_ID_MASK 0xf 1269 /* Pentium 4 family processor id */ 1270 # define PENTIUM4_FAMILY_ID 0xf 1271 /* Bit 28 indicates Hyper-Threading Technology support */ 1272 # define HT_BIT_SHIFT 28 1273 # define HT_BIT_MASK 1 1274 uint32_t vendor_id[3] = { 0U, 0U, 0U }; 1275 uint32_t value_of_eax = 0U; 1276 uint32_t value_of_edx = 0U; 1277 uint32_t dummy = 0U; 1278 1279 /* Yes, this is supposed to be [0], [2], [1] */ 1280 get_cpuid(0, &dummy, &vendor_id[0], &vendor_id[2], &vendor_id[1]); 1281 if (_launcher_debug) { 1282 printf("vendor: %c %c %c %c %c %c %c %c %c %c %c %c \n", 1283 ((vendor_id[0] >> 0) & 0xff), 1284 ((vendor_id[0] >> 8) & 0xff), 1285 ((vendor_id[0] >> 16) & 0xff), 1286 ((vendor_id[0] >> 24) & 0xff), 1287 ((vendor_id[1] >> 0) & 0xff), 1288 ((vendor_id[1] >> 8) & 0xff), 1289 ((vendor_id[1] >> 16) & 0xff), 1290 ((vendor_id[1] >> 24) & 0xff), 1291 ((vendor_id[2] >> 0) & 0xff), 1292 ((vendor_id[2] >> 8) & 0xff), 1293 ((vendor_id[2] >> 16) & 0xff), 1294 ((vendor_id[2] >> 24) & 0xff)); 1295 } 1296 get_cpuid(1, &value_of_eax, &dummy, &dummy, &value_of_edx); 1297 if (_launcher_debug) { 1298 printf("value_of_eax: 0x%x value_of_edx: 0x%x\n", 1299 value_of_eax, value_of_edx); 1300 } 1301 if ((((value_of_eax >> FAMILY_ID_SHIFT) & FAMILY_ID_MASK) == PENTIUM4_FAMILY_ID) || 1302 (((value_of_eax >> EXT_FAMILY_ID_SHIFT) & EXT_FAMILY_ID_MASK) != 0)) { 1303 if ((((vendor_id[0] >> 0) & 0xff) == 'G') && 1304 (((vendor_id[0] >> 8) & 0xff) == 'e') && 1305 (((vendor_id[0] >> 16) & 0xff) == 'n') && 1306 (((vendor_id[0] >> 24) & 0xff) == 'u') && 1307 (((vendor_id[1] >> 0) & 0xff) == 'i') && 1308 (((vendor_id[1] >> 8) & 0xff) == 'n') && 1309 (((vendor_id[1] >> 16) & 0xff) == 'e') && 1310 (((vendor_id[1] >> 24) & 0xff) == 'I') && 1311 (((vendor_id[2] >> 0) & 0xff) == 'n') && 1312 (((vendor_id[2] >> 8) & 0xff) == 't') && 1313 (((vendor_id[2] >> 16) & 0xff) == 'e') && 1314 (((vendor_id[2] >> 24) & 0xff) == 'l')) { 1315 if (((value_of_edx >> HT_BIT_SHIFT) & HT_BIT_MASK) == HT_BIT_MASK) { 1316 if (_launcher_debug) { 1317 printf("Hyperthreading supported\n"); 1318 } 1319 result = hts_supported; 1320 } else { 1321 if (_launcher_debug) { 1322 printf("Hyperthreading not supported\n"); 1323 } 1324 result = hts_not_supported; 1325 } 1326 } else { 1327 if (_launcher_debug) { 1328 printf("Not GenuineIntel\n"); 1329 } 1330 result = hts_not_intel; 1331 } 1332 } else { 1333 if (_launcher_debug) { 1334 printf("not Pentium 4 or extended\n"); 1335 } 1336 result = hts_not_pentium4; 1337 } 1338 return result; 1339 } 1340 1341 /* Determine how many logical processors there are per CPU */ 1342 unsigned int 1343 logical_processors_per_package(void) { 1344 /* 1345 * After CPUID with EAX==1, register EBX bits 23 through 16 1346 * indicate the number of logical processors per package 1347 */ 1348 # define NUM_LOGICAL_SHIFT 16 1349 # define NUM_LOGICAL_MASK 0xff 1350 unsigned int result = 1U; 1351 const HyperThreadingSupport hyperthreading = hyperthreading_support(); 1352 1353 if (hyperthreading == hts_supported) { 1354 uint32_t value_of_ebx = 0U; 1355 uint32_t dummy = 0U; 1356 1357 get_cpuid(1, &dummy, &value_of_ebx, &dummy, &dummy); 1358 result = (value_of_ebx >> NUM_LOGICAL_SHIFT) & NUM_LOGICAL_MASK; 1359 if (_launcher_debug) { 1360 printf("logical processors per package: %u\n", result); 1361 } 1362 } 1363 return result; 1364 } 1365 1366 /* Compute the number of physical processors, not logical processors */ 1367 unsigned long 1368 physical_processors(void) { 1369 const long sys_processors = sysconf(_SC_NPROCESSORS_CONF); 1370 unsigned long result = sys_processors; 1371 1372 if (_launcher_debug) { 1373 printf("sysconf(_SC_NPROCESSORS_CONF): %lu\n", sys_processors); 1374 } 1375 if (sys_processors > 1) { 1376 unsigned int logical_processors = logical_processors_per_package(); 1377 if (logical_processors > 1) { 1378 result = (unsigned long) sys_processors / logical_processors; 1379 } 1380 } 1381 if (_launcher_debug) { 1382 printf("physical processors: %lu\n", result); 1383 } 1384 return result; 1385 } 1386 1387 #endif /* i586 */ 1388 1389 #if defined(__sun) && defined(i586) 1390 1391 /* The definition of a server-class machine for solaris-i586/amd64 */ 1392 jboolean 1393 solaris_i586_ServerClassMachine(void) { 1394 jboolean result = JNI_FALSE; 1395 /* How big is a server class machine? */ 1396 const unsigned long server_processors = 2UL; 1397 const uint64_t server_memory = 2UL * GB; 1398 /* 1399 * We seem not to get our full complement of memory. 1400 * We allow some part (1/8?) of the memory to be "missing", 1401 * based on the sizes of DIMMs, and maybe graphics cards. 1402 */ 1403 const uint64_t missing_memory = 256UL * MB; 1404 const uint64_t actual_memory = physical_memory(); 1405 1406 /* Is this a server class machine? */ 1407 if (actual_memory >= (server_memory - missing_memory)) { 1408 const unsigned long actual_processors = physical_processors(); 1409 if (actual_processors >= server_processors) { 1410 result = JNI_TRUE; 1411 } 1412 } 1413 if (_launcher_debug) { 1414 printf("solaris_" LIBARCHNAME "_ServerClassMachine: %s\n", 1415 (result == JNI_TRUE ? "true" : "false")); 1416 } 1417 return result; 1418 } 1419 1420 #endif /* __sun && i586 */ 1421 1422 #if defined(__linux__) && defined(i586) 1423 1424 /* The definition of a server-class machine for linux-i586 */ 1425 jboolean 1426 linux_i586_ServerClassMachine(void) { 1427 jboolean result = JNI_FALSE; 1428 /* How big is a server class machine? */ 1429 const unsigned long server_processors = 2UL; 1430 const uint64_t server_memory = 2UL * GB; 1431 /* 1432 * We seem not to get our full complement of memory. 1433 * We allow some part (1/8?) of the memory to be "missing", 1434 * based on the sizes of DIMMs, and maybe graphics cards. 1435 */ 1436 const uint64_t missing_memory = 256UL * MB; 1437 const uint64_t actual_memory = physical_memory(); 1438 1439 /* Is this a server class machine? */ 1440 if (actual_memory >= (server_memory - missing_memory)) { 1441 const unsigned long actual_processors = physical_processors(); 1442 if (actual_processors >= server_processors) { 1443 result = JNI_TRUE; 1444 } 1445 } 1446 if (_launcher_debug) { 1447 printf("linux_" LIBARCHNAME "_ServerClassMachine: %s\n", 1448 (result == JNI_TRUE ? "true" : "false")); 1449 } 1450 return result; 1451 } 1452 1453 #endif /* __linux__ && i586 */ 1454 1455 /* Dispatch to the platform-specific definition of "server-class" */ 1456 jboolean 1457 ServerClassMachine(void) { 1458 jboolean result = JNI_FALSE; 1459 #if defined(NEVER_ACT_AS_SERVER_CLASS_MACHINE) 1460 result = JNI_FALSE; 1461 #elif defined(ALWAYS_ACT_AS_SERVER_CLASS_MACHINE) 1462 result = JNI_TRUE; 1463 #elif defined(__sun) && defined(__sparc) 1464 result = solaris_sparc_ServerClassMachine(); 1465 #elif defined(__sun) && defined(i586) 1466 result = solaris_i586_ServerClassMachine(); 1467 #elif defined(__linux__) && defined(i586) 1468 result = linux_i586_ServerClassMachine(); 1469 #else 1470 if (_launcher_debug) { 1471 printf("ServerClassMachine: returns default value of %s\n", 1472 (result == JNI_TRUE ? "true" : "false")); 1473 } 1474 #endif 1475 return result; 1476 } 1477 1478 /* 1479 * Since using the file system as a registry is a bit risky, perform 1480 * additional sanity checks on the identified directory to validate 1481 * it as a valid jre/sdk. 1482 * 1483 * Return 0 if the tests fail; otherwise return non-zero (true). 1484 * 1485 * Note that checking for anything more than the existence of an 1486 * executable object at bin/java relative to the path being checked 1487 * will break the regression tests. 1488 */ 1489 static int 1490 CheckSanity(char *path, char *dir) 1491 { 1492 char buffer[PATH_MAX]; 1493 1494 if (strlen(path) + strlen(dir) + 11 > PATH_MAX) 1495 return (0); /* Silently reject "impossibly" long paths */ 1496 1497 (void)strcat(strcat(strcat(strcpy(buffer, path), "/"), dir), "/bin/java"); 1498 return ((access(buffer, X_OK) == 0) ? 1 : 0); 1499 } 1500 1501 /* 1502 * Determine if there is an acceptable JRE in the directory dirname. 1503 * Upon locating the "best" one, return a fully qualified path to 1504 * it. "Best" is defined as the most advanced JRE meeting the 1505 * constraints contained in the manifest_info. If no JRE in this 1506 * directory meets the constraints, return NULL. 1507 * 1508 * Note that we don't check for errors in reading the directory 1509 * (which would be done by checking errno). This is because it 1510 * doesn't matter if we get an error reading the directory, or 1511 * we just don't find anything interesting in the directory. We 1512 * just return NULL in either case. 1513 * 1514 * The historical names of j2sdk and j2re were changed to jdk and 1515 * jre respecively as part of the 1.5 rebranding effort. Since the 1516 * former names are legacy on Linux, they must be recognized for 1517 * all time. Fortunately, this is a minor cost. 1518 */ 1519 static char 1520 *ProcessDir(manifest_info *info, char *dirname) 1521 { 1522 DIR *dirp; 1523 struct dirent *dp; 1524 char *best = NULL; 1525 int offset; 1526 int best_offset = 0; 1527 char *ret_str = NULL; 1528 char buffer[PATH_MAX]; 1529 1530 if ((dirp = opendir(dirname)) == NULL) 1531 return (NULL); 1532 1533 do { 1534 if ((dp = readdir(dirp)) != NULL) { 1535 offset = 0; 1536 if ((strncmp(dp->d_name, "jre", 3) == 0) || 1537 (strncmp(dp->d_name, "jdk", 3) == 0)) 1538 offset = 3; 1539 else if (strncmp(dp->d_name, "j2re", 4) == 0) 1540 offset = 4; 1541 else if (strncmp(dp->d_name, "j2sdk", 5) == 0) 1542 offset = 5; 1543 if (offset > 0) { 1544 if ((JLI_AcceptableRelease(dp->d_name + offset, 1545 info->jre_version)) && CheckSanity(dirname, dp->d_name)) 1546 if ((best == NULL) || (JLI_ExactVersionId( 1547 dp->d_name + offset, best + best_offset) > 0)) { 1548 if (best != NULL) 1549 JLI_MemFree(best); 1550 best = JLI_StringDup(dp->d_name); 1551 best_offset = offset; 1552 } 1553 } 1554 } 1555 } while (dp != NULL); 1556 (void) closedir(dirp); 1557 if (best == NULL) 1558 return (NULL); 1559 else { 1560 ret_str = JLI_MemAlloc(strlen(dirname) + strlen(best) + 2); 1561 ret_str = strcat(strcat(strcpy(ret_str, dirname), "/"), best); 1562 JLI_MemFree(best); 1563 return (ret_str); 1564 } 1565 } 1566 1567 /* 1568 * This is the global entry point. It examines the host for the optimal 1569 * JRE to be used by scanning a set of directories. The set of directories 1570 * is platform dependent and can be overridden by the environment 1571 * variable JAVA_VERSION_PATH. 1572 * 1573 * This routine itself simply determines the set of appropriate 1574 * directories before passing control onto ProcessDir(). 1575 */ 1576 char* 1577 LocateJRE(manifest_info* info) 1578 { 1579 char *path; 1580 char *home; 1581 char *target = NULL; 1582 char *dp; 1583 char *cp; 1584 1585 /* 1586 * Start by getting JAVA_VERSION_PATH 1587 */ 1588 if (info->jre_restrict_search) 1589 path = JLI_StringDup(system_dir); 1590 else if ((path = getenv("JAVA_VERSION_PATH")) != NULL) 1591 path = JLI_StringDup(path); 1592 else 1593 if ((home = getenv("HOME")) != NULL) { 1594 path = (char *)JLI_MemAlloc(strlen(home) + strlen(system_dir) + 1595 strlen(user_dir) + 2); 1596 path = strcat(strcat(strcat(strcpy(path, home), 1597 user_dir), ":"), system_dir); 1598 } else 1599 path = JLI_StringDup(system_dir); 1600 1601 /* 1602 * Step through each directory on the path. Terminate the scan with 1603 * the first directory with an acceptable JRE. 1604 */ 1605 cp = dp = path; 1606 while (dp != NULL) { 1607 cp = strchr(dp, (int)':'); 1608 if (cp != NULL) 1609 *cp = (char)NULL; 1610 if ((target = ProcessDir(info, dp)) != NULL) 1611 break; 1612 dp = cp; 1613 if (dp != NULL) 1614 dp++; 1615 } 1616 JLI_MemFree(path); 1617 return (target); 1618 } 1619 1620 /* 1621 * Given a path to a jre to execute, this routine checks if this process 1622 * is indeed that jre. If not, it exec's that jre. 1623 * 1624 * We want to actually check the paths rather than just the version string 1625 * built into the executable, so that given version specification (and 1626 * JAVA_VERSION_PATH) will yield the exact same Java environment, regardless 1627 * of the version of the arbitrary launcher we start with. 1628 */ 1629 void 1630 ExecJRE(char *jre, char **argv) 1631 { 1632 char wanted[PATH_MAX]; 1633 char *execname; 1634 char *progname; 1635 1636 /* 1637 * Resolve the real path to the directory containing the selected JRE. 1638 */ 1639 if (realpath(jre, wanted) == NULL) { 1640 fprintf(stderr, "Unable to resolve %s\n", jre); 1641 exit(1); 1642 } 1643 1644 /* 1645 * Resolve the real path to the currently running launcher. 1646 */ 1647 execname = SetExecname(argv); 1648 if (execname == NULL) { 1649 fprintf(stderr, "Unable to resolve current executable\n"); 1650 exit(1); 1651 } 1652 1653 /* 1654 * If the path to the selected JRE directory is a match to the initial 1655 * portion of the path to the currently executing JRE, we have a winner! 1656 * If so, just return. 1657 */ 1658 if (strncmp(wanted, execname, strlen(wanted)) == 0) 1659 return; /* I am the droid you were looking for */ 1660 1661 /* 1662 * If this isn't the selected version, exec the selected version. 1663 */ 1664 #ifdef JAVA_ARGS /* javac, jar and friends. */ 1665 progname = "java"; 1666 #else /* java, oldjava, javaw and friends */ 1667 #ifdef PROGNAME 1668 progname = PROGNAME; 1669 #else 1670 progname = *argv; 1671 if ((s = strrchr(progname, FILE_SEPARATOR)) != 0) { 1672 progname = s + 1; 1673 } 1674 #endif /* PROGNAME */ 1675 #endif /* JAVA_ARGS */ 1676 1677 /* 1678 * This should never happen (because of the selection code in SelectJRE), 1679 * but check for "impossibly" long path names just because buffer overruns 1680 * can be so deadly. 1681 */ 1682 if (strlen(wanted) + strlen(progname) + 6 > PATH_MAX) { 1683 fprintf(stderr, "Path length exceeds maximum length (PATH_MAX)\n"); 1684 exit(1); 1685 } 1686 1687 /* 1688 * Construct the path and exec it. 1689 */ 1690 (void)strcat(strcat(wanted, "/bin/"), progname); 1691 argv[0] = progname; 1692 if (_launcher_debug) { 1693 int i; 1694 printf("ReExec Command: %s (%s)\n", wanted, argv[0]); 1695 printf("ReExec Args:"); 1696 for (i = 1; argv[i] != NULL; i++) 1697 printf(" %s", argv[i]); 1698 printf("\n"); 1699 } 1700 (void)fflush(stdout); 1701 (void)fflush(stderr); 1702 execv(wanted, argv); 1703 perror("execv()"); 1704 fprintf(stderr, "Exec of %s failed\n", wanted); 1705 exit(1); 1706 } 1707 #endif /* ifndef GAMMA */ 1708 1709 /* 1710 * "Borrowed" from Solaris 10 where the unsetenv() function is being added 1711 * to libc thanks to SUSv3 (Standard Unix Specification, version 3). As 1712 * such, in the fullness of time this will appear in libc on all relevant 1713 * Solaris/Linux platforms and maybe even the Windows platform. At that 1714 * time, this stub can be removed. 1715 * 1716 * This implementation removes the environment locking for multithreaded 1717 * applications. (We don't have access to these mutexes within libc and 1718 * the launcher isn't multithreaded.) Note that what remains is platform 1719 * independent, because it only relies on attributes that a POSIX environment 1720 * defines. 1721 * 1722 * Returns 0 on success, -1 on failure. 1723 * 1724 * Also removed was the setting of errno. The only value of errno set 1725 * was EINVAL ("Invalid Argument"). 1726 */ 1727 1728 /* 1729 * s1(environ) is name=value 1730 * s2(name) is name(not the form of name=value). 1731 * if names match, return value of 1, else return 0 1732 */ 1733 static int 1734 match_noeq(const char *s1, const char *s2) 1735 { 1736 while (*s1 == *s2++) { 1737 if (*s1++ == '=') 1738 return (1); 1739 } 1740 if (*s1 == '=' && s2[-1] == '\0') 1741 return (1); 1742 return (0); 1743 } 1744 1745 /* 1746 * added for SUSv3 standard 1747 * 1748 * Delete entry from environ. 1749 * Do not free() memory! Other threads may be using it. 1750 * Keep it around forever. 1751 */ 1752 static int 1753 borrowed_unsetenv(const char *name) 1754 { 1755 long idx; /* index into environ */ 1756 1757 if (name == NULL || *name == '\0' || 1758 strchr(name, '=') != NULL) { 1759 return (-1); 1760 } 1761 1762 for (idx = 0; environ[idx] != NULL; idx++) { 1763 if (match_noeq(environ[idx], name)) 1764 break; 1765 } 1766 if (environ[idx] == NULL) { 1767 /* name not found but still a success */ 1768 return (0); 1769 } 1770 /* squeeze up one entry */ 1771 do { 1772 environ[idx] = environ[idx+1]; 1773 } while (environ[++idx] != NULL); 1774 1775 return (0); 1776 } 1777 /* --- End of "borrowed" code --- */ 1778 1779 /* 1780 * Wrapper for unsetenv() function. 1781 */ 1782 int 1783 UnsetEnv(char *name) 1784 { 1785 return(borrowed_unsetenv(name)); 1786 } 1787 1788 /* --- Splash Screen shared library support --- */ 1789 1790 static const char* SPLASHSCREEN_SO = "libsplashscreen.so"; 1791 1792 static void* hSplashLib = NULL; 1793 1794 void* SplashProcAddress(const char* name) { 1795 if (!hSplashLib) { 1796 hSplashLib = dlopen(SPLASHSCREEN_SO, RTLD_LAZY | RTLD_GLOBAL); 1797 } 1798 if (hSplashLib) { 1799 void* sym = dlsym(hSplashLib, name); 1800 return sym; 1801 } else { 1802 return NULL; 1803 } 1804 } 1805 1806 void SplashFreeLibrary() { 1807 if (hSplashLib) { 1808 dlclose(hSplashLib); 1809 hSplashLib = NULL; 1810 } 1811 } 1812 1813 const char * 1814 jlong_format_specifier() { 1815 return "%lld"; 1816 } 1817 1818 /* 1819 * Block current thread and continue execution in a new thread 1820 */ 1821 int 1822 ContinueInNewThread(int (JNICALL *continuation)(void *), jlong stack_size, void * args) { 1823 int rslt; 1824 #ifdef __linux__ 1825 pthread_t tid; 1826 pthread_attr_t attr; 1827 pthread_attr_init(&attr); 1828 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE); 1829 1830 if (stack_size > 0) { 1831 pthread_attr_setstacksize(&attr, stack_size); 1832 } 1833 1834 if (pthread_create(&tid, &attr, (void *(*)(void*))continuation, (void*)args) == 0) { 1835 void * tmp; 1836 pthread_join(tid, &tmp); 1837 rslt = (int)(intptr_t)tmp; 1838 } else { 1839 /* 1840 * Continue execution in current thread if for some reason (e.g. out of 1841 * memory/LWP) a new thread can't be created. This will likely fail 1842 * later in continuation as JNI_CreateJavaVM needs to create quite a 1843 * few new threads, anyway, just give it a try.. 1844 */ 1845 rslt = continuation(args); 1846 } 1847 1848 pthread_attr_destroy(&attr); 1849 #else 1850 thread_t tid; 1851 long flags = 0; 1852 if (thr_create(NULL, stack_size, (void *(*)(void *))continuation, args, flags, &tid) == 0) { 1853 void * tmp; 1854 thr_join(tid, NULL, &tmp); 1855 rslt = (int)(intptr_t)tmp; 1856 } else { 1857 /* See above. Continue in current thread if thr_create() failed */ 1858 rslt = continuation(args); 1859 } 1860 #endif 1861 return rslt; 1862 } 1863 1864 /* Coarse estimation of number of digits assuming the worst case is a 64-bit pid. */ 1865 #define MAX_PID_STR_SZ 20 1866 1867 void SetJavaLauncherPlatformProps() { 1868 /* Linux only */ 1869 #ifdef __linux__ 1870 const char *substr = "-Dsun.java.launcher.pid="; 1871 char *pid_prop_str = (char *)JLI_MemAlloc(strlen(substr) + MAX_PID_STR_SZ + 1); 1872 sprintf(pid_prop_str, "%s%d", substr, getpid()); 1873 AddOption(pid_prop_str, NULL); 1874 #endif 1875 }