src/runtime/runtime.c

   1 /*
   2  * main() entry point for a stand-alone SBCL image
   3  */
   4
   5 /*
   6  * This software is part of the SBCL system. See the README file for
   7  * more information.
   8  *
   9  * This software is derived from the CMU CL system, which was
  10  * written at Carnegie Mellon University and released into the
  11  * public domain. The software is in the public domain and is
  12  * provided with absolutely no warranty. See the COPYING and CREDITS
  13  * files for more information.
  14  */
  15
  16 #include "sbcl.h"
  17
  18 #include <stdio.h>
  19 #include <string.h>
  20 #ifndef LISP_FEATURE_WIN32
  21 #include <libgen.h>
  22 #endif
  23 #include <sys/types.h>
  24 #ifndef LISP_FEATURE_WIN32
  25 #include <sys/wait.h>
  26 #endif
  27 #include <stdlib.h>
  28 #include <unistd.h>
  29 #include <sys/file.h>
  30 #include <sys/param.h>
  31 #include <sys/stat.h>
  32 #include <signal.h>
  33 #ifndef LISP_FEATURE_WIN32
  34 #include <sched.h>
  35 #endif
  36 #include <errno.h>
  37 #include <locale.h>
  38
  39 #if defined(SVR4) || defined(__linux__)
  40 #include <time.h>
  41 #endif
  42
  43 #include "signal.h"
  44
  45 #include "runtime.h"
  46 #include "alloc.h"
  47 #include "vars.h"
  48 #include "globals.h"
  49 #include "os.h"
  50 #include "interrupt.h"
  51 #include "arch.h"
  52 #include "gc.h"
  53 #include "interr.h"
  54 #include "validate.h"
  55 #include "core.h"
  56 #include "save.h"
  57 #include "lispregs.h"
  58 #include "thread.h"
  59
  60 #include "genesis/static-symbols.h"
  61 #include "genesis/symbol.h"
  62
  63
  64 #ifdef irix
  65 #include <string.h>
  66 #include "interr.h"
  67 #endif
  68
  69 #ifndef SBCL_HOME
  70 #define SBCL_HOME "/usr/local/lib/sbcl/"
  71 #endif
  72
  73 \f
  74 /* SIGINT handler that invokes the monitor (for when Lisp isn't up to it) */
  75 static void
  76 sigint_handler(int signal, siginfo_t *info, void *void_context)
  77 {
  78     lose("\nSIGINT hit at 0x%08lX\n",
  79          (unsigned long) *os_context_pc_addr(void_context));
  80 }
  81
  82 /* (This is not static, because we want to be able to call it from
  83  * Lisp land.) */
  84 void
  85 sigint_init(void)
  86 {
  87     SHOW("entering sigint_init()");
  88     install_handler(SIGINT, sigint_handler);
  89     SHOW("leaving sigint_init()");
  90 }
  91 \f
  92 /*
  93  * helper functions for dealing with command line args
  94  */
  95
  96 void *
  97 successful_malloc(size_t size)
  98 {
  99     void* result = malloc(size);
 100     if (0 == result) {
 101         lose("malloc failure\n");
 102     } else {
 103         return result;
 104     }
 105     return (void *) NULL; /* dummy value: return something ... */
 106 }
 107
 108 char *
 109 copied_string(char *string)
 110 {
 111     return strcpy(successful_malloc(1+strlen(string)), string);
 112 }
 113
 114 char *
 115 copied_existing_filename_or_null(char *filename)
 116 {
 117     struct stat filename_stat;
 118     if (stat(filename, &filename_stat)) { /* if failure */
 119         return 0;
 120     } else {
 121         return copied_string(filename);
 122     }
 123 }
 124
 125 /* Convert a null-terminated array of null-terminated strings (e.g.
 126  * argv or envp) into a Lisp list of Lisp base-strings. */
 127 static lispobj
 128 alloc_base_string_list(char *array_ptr[])
 129 {
 130     if (*array_ptr) {
 131         return alloc_cons(alloc_base_string(*array_ptr),
 132                           alloc_base_string_list(1 + array_ptr));
 133     } else {
 134         return NIL;
 135     }
 136 }
 137 \f
 138 /* miscellaneous chattiness */
 139
 140 void
 141 print_help()
 142 {
 143     puts(
 144 "Usage: sbcl [runtime-options] [toplevel-options] [user-options]\n\
 145 Common runtime options:\n\
 146   --help                     Print this message and exit.\n\
 147   --version                  Print version information and exit.\n\
 148   --core <filename>          Use the specified core file instead of the default.\n\
 149   --dynamic-space-size <MiB> Size of reserved dynamic space in megabytes.\n\
 150 \n\
 151 Common toplevel options:\n\
 152   --sysinit <filename>       System-wide init-file to use instead of default.\n\
 153   --userinit <filename>      Per-user init-file to use instead of default.\n\
 154   --no-sysinit               Inhibit processing of any system-wide init-file.\n\
 155   --no-userinit              Inhibit processing of any per-user init-file.\n\
 156 \n\
 157 User options are not processed by SBCL. All runtime options must\n\
 158 appear before toplevel options, and all toplevel options must\n\
 159 appear before user options.\n\
 160 \n\
 161 For more information please refer to the SBCL User Manual, which\n\
 162 should be installed along with SBCL, and is also available from the\n\
 163 website <http://www.sbcl.org/>.\n");
 164 }
 165
 166 void
 167 print_version()
 168 {
 169     printf("SBCL %s\n", SBCL_VERSION_STRING);
 170 }
 171
 172 void
 173 print_banner()
 174 {
 175     printf(
 176 "This is SBCL %s, an implementation of ANSI Common Lisp.\n\
 177 More information about SBCL is available at <http://www.sbcl.org/>.\n\
 178 \n\
 179 SBCL is free software, provided as is, with absolutely no warranty.\n\
 180 It is mostly in the public domain; some portions are provided under\n\
 181 BSD-style licenses.  See the CREDITS and COPYING files in the\n\
 182 distribution for more information.\n\
 183 ", SBCL_VERSION_STRING);
 184 }
 185
 186 /* Look for a core file to load, first in the directory named by the
 187  * SBCL_HOME environment variable, then in a hardcoded default
 188  * location.  Returns a malloced copy of the core filename. */
 189 char *
 190 search_for_core ()
 191 {
 192     char *sbcl_home = getenv("SBCL_HOME");
 193     char *lookhere;
 194     char *stem = "/sbcl.core";
 195     char *core;
 196
 197     if(!sbcl_home) sbcl_home = SBCL_HOME;
 198     lookhere = (char *) calloc(strlen(sbcl_home) +
 199                                strlen(stem) +
 200                                1,
 201                                sizeof(char));
 202     sprintf(lookhere, "%s%s", sbcl_home, stem);
 203     core = copied_existing_filename_or_null(lookhere);
 204
 205     if (!core) {
 206         lose("can't find core file at %s\n", lookhere);
 207     }
 208
 209     free(lookhere);
 210
 211     return core;
 212 }
 213
 214 char **posix_argv;
 215 char *core_string;
 216
 217 \f
 218 int
 219 main(int argc, char *argv[], char *envp[])
 220 {
 221 #ifdef LISP_FEATURE_WIN32
 222     /* Exception handling support structure. Evil Win32 hack. */
 223     struct lisp_exception_frame exception_frame;
 224 #endif
 225
 226     /* the name of the core file we're to execute. Note that this is
 227      * a malloc'ed string which should be freed eventually. */
 228     char *core = 0;
 229     char **sbcl_argv = 0;
 230     os_vm_offset_t embedded_core_offset = 0;
 231
 232     /* other command line options */
 233     boolean noinform = 0;
 234     boolean end_runtime_options = 0;
 235
 236     lispobj initial_function;
 237
 238     interrupt_init();
 239     block_blockable_signals();
 240
 241     setlocale(LC_ALL, "");
 242
 243     /* Parse our part of the command line (aka "runtime options"),
 244      * stripping out those options that we handle. */
 245     {
 246         int argi = 1;
 247         while (argi < argc) {
 248             char *arg = argv[argi];
 249             if (0 == strcmp(arg, "--noinform")) {
 250                 noinform = 1;
 251                 ++argi;
 252             } else if (0 == strcmp(arg, "--core")) {
 253                 if (core) {
 254                     lose("more than one core file specified\n");
 255                 } else {
 256                     ++argi;
 257                     if (argi >= argc) {
 258                         lose("missing filename for --core argument\n");
 259                     }
 260                     core = copied_string(argv[argi]);
 261                     ++argi;
 262                 }
 263             } else if (0 == strcmp(arg, "--help")) {
 264                 /* I think this is the (or a) usual convention: upon
 265                  * seeing "--help" we immediately print our help
 266                  * string and exit, ignoring everything else. */
 267                 print_help();
 268                 exit(0);
 269             } else if (0 == strcmp(arg, "--version")) {
 270                 /* As in "--help" case, I think this is expected. */
 271                 print_version();
 272                 exit(0);
 273             } else if (0 == strcmp(arg, "--dynamic-space-size")) {
 274                 ++argi;
 275                 if (argi >= argc)
 276                     lose("missing argument for --dynamic-space-size");
 277                 errno = 0;
 278                 dynamic_space_size = strtol(argv[argi++], 0, 0) << 20;
 279                 if (errno)
 280                     lose("argument to --dynamic-space-size is not a number");
 281             } else if (0 == strcmp(arg, "--debug-environment")) {
 282                 int n = 0;
 283                 printf("; Commandline arguments:\n");
 284                 while (n < argc) {
 285                     printf(";  %2d: \"%s\"\n", n, argv[n]);
 286                     ++n;
 287                 }
 288                 n = 0;
 289                 printf(";\n; Environment:\n");
 290                 while (ENVIRON[n]) {
 291                     printf(";  %2d: \"%s\"\n", n, ENVIRON[n]);
 292                     ++n;
 293                 }
 294                 ++argi;
 295             } else if (0 == strcmp(arg, "--end-runtime-options")) {
 296                 end_runtime_options = 1;
 297                 ++argi;
 298                 break;
 299             } else {
 300                 /* This option was unrecognized as a runtime option,
 301                  * so it must be a toplevel option or a user option,
 302                  * so we must be past the end of the runtime option
 303                  * section. */
 304                 break;
 305             }
 306         }
 307         /* This is where we strip out those options that we handle. We
 308          * also take this opportunity to make sure that we don't find
 309          * an out-of-place "--end-runtime-options" option. */
 310         {
 311             char *argi0 = argv[argi];
 312             int argj = 1;
 313             /* (argc - argi) for the arguments, one for the binary,
 314                and one for the terminating NULL. */
 315             sbcl_argv = successful_malloc((2 + argc - argi) * sizeof(char *));
 316             sbcl_argv[0] = argv[0];
 317             while (argi < argc) {
 318                 char *arg = argv[argi++];
 319                 /* If we encounter --end-runtime-options for the first
 320                  * time after the point where we had to give up on
 321                  * runtime options, then the point where we had to
 322                  * give up on runtime options must've been a user
 323                  * error. */
 324                 if (!end_runtime_options &&
 325                     0 == strcmp(arg, "--end-runtime-options")) {
 326                     lose("bad runtime option \"%s\"\n", argi0);
 327                 }
 328                 sbcl_argv[argj++] = arg;
 329             }
 330             sbcl_argv[argj] = 0;
 331         }
 332     }
 333
 334     /* Align down to multiple of page_table page size */
 335     dynamic_space_size &= ~(PAGE_BYTES - 1);
 336
 337     /* KLUDGE: os_vm_page_size is set by os_init(), and on some
 338      * systems (e.g. Alpha) arch_init() needs need os_vm_page_size, so
 339      * it must follow os_init(). -- WHN 2000-01-26 */
 340     os_init(argv, envp);
 341     arch_init();
 342     gc_init();
 343     validate();
 344
 345     /* If no core file was specified, look for one. */
 346     if (!core) {
 347        char *runtime_path = os_get_runtime_executable_path();
 348
 349        if (runtime_path) {
 350           os_vm_offset_t offset = search_for_embedded_core(runtime_path);
 351
 352           if (offset != -1) {
 353              embedded_core_offset = offset;
 354              core = runtime_path;
 355           } else {
 356              free(runtime_path);
 357              core = search_for_core();
 358           }
 359        } else {
 360           core = search_for_core();
 361        }
 362     }
 363
 364     /* Make sure that SBCL_HOME is set, unless loading an embedded core. */
 365     if (!getenv("SBCL_HOME") && embedded_core_offset == 0) {
 366         char *envstring, *copied_core, *dir;
 367         char *stem = "SBCL_HOME=";
 368         copied_core = copied_string(core);
 369         dir = dirname(copied_core);
 370         envstring = (char *) calloc(strlen(stem) +
 371                                     strlen(dir) +
 372                                     1,
 373                                     sizeof(char));
 374         sprintf(envstring, "%s%s", stem, dir);
 375         putenv(envstring);
 376         free(copied_core);
 377     }
 378
 379     if (!noinform && embedded_core_offset == 0) {
 380         print_banner();
 381         fflush(stdout);
 382     }
 383
 384 #if defined(SVR4) || defined(__linux__)
 385     tzset();
 386 #endif
 387
 388     define_var("nil", NIL, 1);
 389     define_var("t", T, 1);
 390
 391     enable_lossage_handler();
 392
 393     globals_init();
 394
 395     initial_function = load_core_file(core, embedded_core_offset);
 396     if (initial_function == NIL) {
 397         lose("couldn't find initial function\n");
 398     }
 399
 400     gc_initialize_pointers();
 401
 402     arch_install_interrupt_handlers();
 403 #ifndef LISP_FEATURE_WIN32
 404     os_install_interrupt_handlers();
 405 #else
 406 /*     wos_install_interrupt_handlers(handler); */
 407     wos_install_interrupt_handlers(&exception_frame);
 408 #endif
 409
 410     /* Pass core filename and the processed argv into Lisp. They'll
 411      * need to be processed further there, to do locale conversion.
 412      */
 413     core_string = core;
 414     posix_argv = sbcl_argv;
 415
 416     FSHOW((stderr, "/funcalling initial_function=0x%lx\n",
 417           (unsigned long)initial_function));
 418 #ifdef LISP_FEATURE_WIN32
 419     fprintf(stderr, "\n\
 420 This is experimental prerelease support for the Windows platform: use\n\
 421 at your own risk.  \"Your Kitten of Death awaits!\"\n");
 422     fflush(stdout);
 423     fflush(stderr);
 424 #endif
 425     create_initial_thread(initial_function);
 426     lose("CATS.  CATS ARE NICE.\n");
 427     return 0;
 428 }