src/runtime/print.c

   1 /* code for low-level debugging/diagnostic output */
   2
   3 /*
   4  * This software is part of the SBCL system. See the README file for
   5  * more information.
   6  *
   7  * This software is derived from the CMU CL system, which was
   8  * written at Carnegie Mellon University and released into the
   9  * public domain. The software is in the public domain and is
  10  * provided with absolutely no warranty. See the COPYING and CREDITS
  11  * files for more information.
  12  */
  13
  14 /*
  15  * FIXME:
  16  *   Some of the code in here (the various
  17  *   foo_slots[], at least) is deeply broken, depending on guessing
  18  *   already out-of-date values instead of getting them from sbcl.h.
  19  */
  20
  21 #include <stdio.h>
  22
  23 #include "print.h"
  24 #include "runtime.h"
  25 #include "sbcl.h"
  26
  27 /* This file can be skipped if we're not supporting LDB. */
  28 #if defined(LISP_FEATURE_SB_LDB)
  29
  30 #include "monitor.h"
  31 #include "vars.h"
  32 #include "os.h"
  33 #include "genesis/static-symbols.h"
  34 #include "primitive-objects.h"
  35
  36 static int max_lines = 20, cur_lines = 0;
  37 static int max_depth = 5, brief_depth = 2, cur_depth = 0;
  38 static int max_length = 5;
  39 static boolean dont_descend = 0, skip_newline = 0;
  40 static int cur_clock = 0;
  41
  42 static void print_obj(char *prefix, lispobj obj);
  43
  44 #define NEWLINE_OR_RETURN if (continue_p(1)) newline(NULL); else return;
  45
  46 char *lowtag_Names[] = {
  47     "even fixnum",
  48     "instance pointer",
  49     "other immediate [0]",
  50     "list pointer",
  51     "odd fixnum",
  52     "function pointer",
  53     "other immediate [1]",
  54     "other pointer"
  55 };
  56
  57 /* FIXME: Yikes! This table implicitly depends on the values in sbcl.h,
  58  * but doesn't actually depend on them, so if they change, it gets
  59  * all broken. We should either get rid of it or
  60  * rewrite the code so that it's cleanly initialized by gc_init_tables[]
  61  * in a way which varies correctly with the values in sbcl.h. */
  62 char *subtype_Names[] = {
  63     "unused 0",
  64     "unused 1",
  65     "bignum",
  66     "ratio",
  67     "single float",
  68     "double float",
  69 #ifdef LONG_FLOAT_WIDETAG
  70     "long float",
  71 #endif
  72     "complex",
  73 #ifdef COMPLEX_SINGLE_FLOAT_WIDETAG
  74     "complex single float",
  75 #endif
  76 #ifdef COMPLEX_DOUBLE_FLOAT_WIDETAG
  77     "complex double float",
  78 #endif
  79 #ifdef COMPLEX_LONG_FLOAT_WIDETAG
  80     "complex long float",
  81 #endif
  82     "simple-array",
  83     "simple-string",
  84     "simple-bit-vector",
  85     "simple-vector",
  86     "(simple-array (unsigned-byte 2) (*))",
  87     "(simple-array (unsigned-byte 4) (*))",
  88     "(simple-array (unsigned-byte 8) (*))",
  89     "(simple-array (unsigned-byte 16) (*))",
  90     "(simple-array (unsigned-byte 32) (*))",
  91 #ifdef SIMPLE_ARRAY_SIGNED_BYTE_8_WIDETAG
  92     "(simple-array (signed-byte 8) (*))",
  93 #endif
  94 #ifdef SIMPLE_ARRAY_SIGNED_BYTE_16_WIDETAG
  95     "(simple-array (signed-byte 16) (*))",
  96 #endif
  97 #ifdef SIMPLE_ARRAY_SIGNED_BYTE_30_WIDETAG
  98     "(simple-array fixnum (*))",
  99 #endif
 100 #ifdef SIMPLE_ARRAY_SIGNED_BYTE_32_WIDETAG
 101     "(simple-array (signed-byte 32) (*))",
 102 #endif
 103     "(simple-array single-float (*))",
 104     "(simple-array double-float (*))",
 105 #ifdef SIMPLE_ARRAY_LONG_FLOAT_WIDETAG
 106     "(simple-array long-float (*))",
 107 #endif
 108 #ifdef SIMPLE_ARRAY_COMPLEX_SINGLE_FLOAT_WIDETAG
 109     "(simple-array (complex single-float) (*))",
 110 #endif
 111 #ifdef SIMPLE_ARRAY_COMPLEX_DOUBLE_FLOAT_WIDETAG
 112     "(simple-array (complex double-float) (*))",
 113 #endif
 114 #ifdef SIMPLE_ARRAY_COMPLEX_LONG_FLOAT_WIDETAG
 115     "(simple-array (complex long-float) (*))",
 116 #endif
 117     "complex-string",
 118     "complex-bit-vector",
 119     "(array * (*))",
 120     "array",
 121     "code header",
 122     "function header",
 123     "closure header",
 124     "funcallable-instance header",
 125     "unused function header 1",
 126     "unused function header 2",
 127     "unused function header 3",
 128     "closure function header",
 129     "return PC header",
 130     "value cell header",
 131     "symbol header",
 132     "character",
 133     "SAP",
 134     "unbound marker",
 135     "weak pointer",
 136     "instance header",
 137     "fdefn"
 138 };
 139
 140 static void indent(int in)
 141 {
 142     static char *spaces = "                                                                ";
 143
 144     while (in > 64) {
 145         fputs(spaces, stdout);
 146         in -= 64;
 147     }
 148     if (in != 0)
 149         fputs(spaces + 64 - in, stdout);
 150 }
 151
 152 static boolean continue_p(boolean newline)
 153 {
 154     char buffer[256];
 155
 156     if (cur_depth >= max_depth || dont_descend)
 157         return 0;
 158
 159     if (newline) {
 160         if (skip_newline)
 161             skip_newline = 0;
 162         else
 163             putchar('\n');
 164
 165         if (cur_lines >= max_lines) {
 166             printf("More? [y] ");
 167             fflush(stdout);
 168
 169             fgets(buffer, sizeof(buffer), stdin);
 170
 171             if (buffer[0] == 'n' || buffer[0] == 'N')
 172                 throw_to_monitor();
 173             else
 174                 cur_lines = 0;
 175         }
 176     }
 177
 178     return 1;
 179 }
 180
 181 static void newline(char *label)
 182 {
 183     cur_lines++;
 184     if (label != NULL)
 185         fputs(label, stdout);
 186     putchar('\t');
 187     indent(cur_depth * 2);
 188 }
 189
 190
 191 static void brief_fixnum(lispobj obj)
 192 {
 193 #ifndef alpha
 194     printf("%ld", ((long)obj)>>2);
 195 #else
 196     printf("%d", ((s32)obj)>>2);
 197 #endif
 198 }
 199
 200 static void print_fixnum(lispobj obj)
 201 {
 202 #ifndef alpha
 203     printf(": %ld", ((long)obj)>>2);
 204 #else
 205     printf(": %d", ((s32)obj)>>2);
 206 #endif
 207 }
 208
 209 static void brief_otherimm(lispobj obj)
 210 {
 211     int type, c, idx;
 212     char buffer[10];
 213
 214     type = widetag_of(obj);
 215     switch (type) {
 216         case BASE_CHAR_WIDETAG:
 217             c = (obj>>8)&0xff;
 218             switch (c) {
 219                 case '\0':
 220                     printf("#\\Null");
 221                     break;
 222                 case '\n':
 223                     printf("#\\Newline");
 224                     break;
 225                 case '\b':
 226                     printf("#\\Backspace");
 227                     break;
 228                 case '\177':
 229                     printf("#\\Delete");
 230                     break;
 231                 default:
 232                     strcpy(buffer, "#\\");
 233                     if (c >= 128) {
 234                         strcat(buffer, "m-");
 235                         c -= 128;
 236                     }
 237                     if (c < 32) {
 238                         strcat(buffer, "c-");
 239                         c += '@';
 240                     }
 241                     printf("%s%c", buffer, c);
 242                     break;
 243             }
 244             break;
 245
 246         case UNBOUND_MARKER_WIDETAG:
 247             printf("<unbound marker>");
 248             break;
 249
 250         default:
 251             idx = type >> 2;
 252             if (idx < (sizeof(lowtag_Names) / sizeof(char *)))
 253                     printf("%s", lowtag_Names[idx]);
 254             else
 255                     printf("unknown type (0x%0x)", type);
 256             break;
 257     }
 258 }
 259
 260 static void print_otherimm(lispobj obj)
 261 {
 262     int type, idx;
 263
 264     type = widetag_of(obj);
 265     idx = type >> 2;
 266
 267     if (idx < (sizeof(lowtag_Names) / sizeof(char *)))
 268             printf(", %s", lowtag_Names[idx]);
 269     else
 270             printf(", unknown type (0x%0x)", type);
 271
 272     switch (widetag_of(obj)) {
 273         case BASE_CHAR_WIDETAG:
 274             printf(": ");
 275             brief_otherimm(obj);
 276             break;
 277
 278         case SAP_WIDETAG:
 279         case UNBOUND_MARKER_WIDETAG:
 280             break;
 281
 282         default:
 283             printf(": data=%ld", (long) (obj>>8)&0xffffff);
 284             break;
 285     }
 286 }
 287
 288 static void brief_list(lispobj obj)
 289 {
 290     int space = 0;
 291     int length = 0;
 292
 293     if (!is_valid_lisp_addr((os_vm_address_t)native_pointer(obj)))
 294         printf("(invalid Lisp-level address)");
 295     else if (obj == NIL)
 296         printf("NIL");
 297     else {
 298         putchar('(');
 299         while (lowtag_of(obj) == LIST_POINTER_LOWTAG) {
 300             struct cons *cons = (struct cons *)native_pointer(obj);
 301
 302             if (space)
 303                 putchar(' ');
 304             if (++length >= max_length) {
 305                 printf("...");
 306                 obj = NIL;
 307                 break;
 308             }
 309             print_obj(NULL, cons->car);
 310             obj = cons->cdr;
 311             space = 1;
 312             if (obj == NIL)
 313                 break;
 314         }
 315         if (obj != NIL) {
 316             printf(" . ");
 317             print_obj(NULL, obj);
 318         }
 319         putchar(')');
 320     }
 321 }
 322
 323 static void print_list(lispobj obj)
 324 {
 325     if (!is_valid_lisp_addr((os_vm_address_t)native_pointer(obj))) {
 326         printf("(invalid address)");
 327     } else if (obj == NIL) {
 328         printf(" (NIL)");
 329     } else {
 330         struct cons *cons = (struct cons *)native_pointer(obj);
 331
 332         print_obj("car: ", cons->car);
 333         print_obj("cdr: ", cons->cdr);
 334     }
 335 }
 336
 337 static void brief_struct(lispobj obj)
 338 {
 339     printf("#<ptr to 0x%08lx instance>",
 340            (unsigned long) ((struct instance *)native_pointer(obj))->slots[0]);
 341 }
 342
 343 static void print_struct(lispobj obj)
 344 {
 345     struct instance *instance = (struct instance *)native_pointer(obj);
 346     int i;
 347     char buffer[16];
 348     print_obj("type: ", ((struct instance *)native_pointer(obj))->slots[0]);
 349     for (i = 1; i < HeaderValue(instance->header); i++) {
 350         sprintf(buffer, "slot %d: ", i);
 351         print_obj(buffer, instance->slots[i]);
 352     }
 353 }
 354
 355 static void brief_otherptr(lispobj obj)
 356 {
 357     lispobj *ptr, header;
 358     int type;
 359     struct symbol *symbol;
 360     struct vector *vector;
 361     char *charptr;
 362
 363     ptr = (lispobj *) native_pointer(obj);
 364
 365     if (!is_valid_lisp_addr((os_vm_address_t)obj)) {
 366             printf("(invalid address)");
 367             return;
 368     }
 369
 370     header = *ptr;
 371     type = widetag_of(header);
 372     switch (type) {
 373         case SYMBOL_HEADER_WIDETAG:
 374             symbol = (struct symbol *)ptr;
 375             vector = (struct vector *)native_pointer(symbol->name);
 376             for (charptr = (char *)vector->data; *charptr != '\0'; charptr++) {
 377                 if (*charptr == '"')
 378                     putchar('\\');
 379                 putchar(*charptr);
 380             }
 381             break;
 382
 383         case SIMPLE_STRING_WIDETAG:
 384             vector = (struct vector *)ptr;
 385             putchar('"');
 386             for (charptr = (char *)vector->data; *charptr != '\0'; charptr++) {
 387                 if (*charptr == '"')
 388                     putchar('\\');
 389                 putchar(*charptr);
 390             }
 391             putchar('"');
 392             break;
 393
 394         default:
 395             printf("#<ptr to ");
 396             brief_otherimm(header);
 397             putchar('>');
 398     }
 399 }
 400
 401 static void print_slots(char **slots, int count, lispobj *ptr)
 402 {
 403     while (count-- > 0) {
 404         if (*slots) {
 405             print_obj(*slots++, *ptr++);
 406         } else {
 407             print_obj("???: ", *ptr++);
 408         }
 409     }
 410 }
 411
 412 /* FIXME: Yikes again! This, like subtype_Names[], needs to depend
 413  * on the values in sbcl.h (or perhaps be generated automatically
 414  * by GENESIS as part of sbcl.h). */
 415 static char *symbol_slots[] = {"value: ", "unused: ",
 416     "plist: ", "name: ", "package: ", NULL};
 417 static char *ratio_slots[] = {"numer: ", "denom: ", NULL};
 418 static char *complex_slots[] = {"real: ", "imag: ", NULL};
 419 static char *code_slots[] = {"words: ", "entry: ", "debug: ", NULL};
 420 static char *fn_slots[] = {
 421     "self: ", "next: ", "name: ", "arglist: ", "type: ", NULL};
 422 static char *closure_slots[] = {"fn: ", NULL};
 423 static char *funcallable_instance_slots[] = {"fn: ", "lexenv: ", "layout: ", NULL};
 424 static char *weak_pointer_slots[] = {"value: ", NULL};
 425 static char *fdefn_slots[] = {"name: ", "function: ", "raw_addr: ", NULL};
 426 static char *value_cell_slots[] = {"value: ", NULL};
 427
 428 static void print_otherptr(lispobj obj)
 429 {
 430     if (!is_valid_lisp_addr((os_vm_address_t)obj)) {
 431         printf("(invalid address)");
 432     } else {
 433 #ifndef alpha
 434         lispobj *ptr;
 435         unsigned long header;
 436         unsigned long length;
 437 #else
 438         u32 *ptr;
 439         u32 header;
 440         u32 length;
 441 #endif
 442         int count, type, index;
 443         char *cptr, buffer[16];
 444
 445         ptr = (lispobj*) native_pointer(obj);
 446         if (ptr == NULL) {
 447                 printf(" (NULL Pointer)");
 448                 return;
 449         }
 450
 451         header = *ptr++;
 452         length = (*ptr) >> 2;
 453         count = header>>8;
 454         type = widetag_of(header);
 455
 456         print_obj("header: ", header);
 457         if (lowtag_of(header) != OTHER_IMMEDIATE_0_LOWTAG &&
 458             lowtag_of(header) != OTHER_IMMEDIATE_1_LOWTAG) {
 459             NEWLINE_OR_RETURN;
 460             printf("(invalid header object)");
 461             return;
 462         }
 463
 464         switch (type) {
 465             case BIGNUM_WIDETAG:
 466                 ptr += count;
 467                 NEWLINE_OR_RETURN;
 468                 printf("0x");
 469                 while (count-- > 0)
 470                     printf("%08lx", (unsigned long) *--ptr);
 471                 break;
 472
 473             case RATIO_WIDETAG:
 474                 print_slots(ratio_slots, count, ptr);
 475                 break;
 476
 477             case COMPLEX_WIDETAG:
 478                 print_slots(complex_slots, count, ptr);
 479                 break;
 480
 481             case SYMBOL_HEADER_WIDETAG:
 482                 print_slots(symbol_slots, count, ptr);
 483                 break;
 484
 485             case SINGLE_FLOAT_WIDETAG:
 486                 NEWLINE_OR_RETURN;
 487                 printf("%g", ((struct single_float *)native_pointer(obj))->value);
 488                 break;
 489
 490             case DOUBLE_FLOAT_WIDETAG:
 491                 NEWLINE_OR_RETURN;
 492                 printf("%g", ((struct double_float *)native_pointer(obj))->value);
 493                 break;
 494
 495 #ifdef LONG_FLOAT_WIDETAG
 496             case LONG_FLOAT_WIDETAG:
 497                 NEWLINE_OR_RETURN;
 498                 printf("%Lg", ((struct long_float *)native_pointer(obj))->value);
 499                 break;
 500 #endif
 501
 502 #ifdef COMPLEX_SINGLE_FLOAT_WIDETAG
 503             case COMPLEX_SINGLE_FLOAT_WIDETAG:
 504                 NEWLINE_OR_RETURN;
 505                 printf("%g", ((struct complex_single_float *)native_pointer(obj))->real);
 506                 NEWLINE_OR_RETURN;
 507                 printf("%g", ((struct complex_single_float *)native_pointer(obj))->imag);
 508                 break;
 509 #endif
 510
 511 #ifdef COMPLEX_DOUBLE_FLOAT_WIDETAG
 512             case COMPLEX_DOUBLE_FLOAT_WIDETAG:
 513                 NEWLINE_OR_RETURN;
 514                 printf("%g", ((struct complex_double_float *)native_pointer(obj))->real);
 515                 NEWLINE_OR_RETURN;
 516                 printf("%g", ((struct complex_double_float *)native_pointer(obj))->imag);
 517                 break;
 518 #endif
 519
 520 #ifdef COMPLEX_LONG_FLOAT_WIDETAG
 521             case COMPLEX_LONG_FLOAT_WIDETAG:
 522                 NEWLINE_OR_RETURN;
 523                 printf("%Lg", ((struct complex_long_float *)native_pointer(obj))->real);
 524                 NEWLINE_OR_RETURN;
 525                 printf("%Lg", ((struct complex_long_float *)native_pointer(obj))->imag);
 526                 break;
 527 #endif
 528
 529             case SIMPLE_STRING_WIDETAG:
 530                 NEWLINE_OR_RETURN;
 531                 cptr = (char *)(ptr+1);
 532                 putchar('"');
 533                 while (length-- > 0)
 534                     putchar(*cptr++);
 535                 putchar('"');
 536                 break;
 537
 538             case SIMPLE_VECTOR_WIDETAG:
 539                 NEWLINE_OR_RETURN;
 540                 printf("length = %ld", length);
 541                 ptr++;
 542                 index = 0;
 543                 while (length-- > 0) {
 544                     sprintf(buffer, "%d: ", index++);
 545                     print_obj(buffer, *ptr++);
 546                 }
 547                 break;
 548
 549             case INSTANCE_HEADER_WIDETAG:
 550                 NEWLINE_OR_RETURN;
 551                 printf("length = %ld", (long) count);
 552                 index = 0;
 553                 while (count-- > 0) {
 554                     sprintf(buffer, "%d: ", index++);
 555                     print_obj(buffer, *ptr++);
 556                 }
 557                 break;
 558
 559             case SIMPLE_ARRAY_WIDETAG:
 560             case SIMPLE_BIT_VECTOR_WIDETAG:
 561             case SIMPLE_ARRAY_UNSIGNED_BYTE_2_WIDETAG:
 562             case SIMPLE_ARRAY_UNSIGNED_BYTE_4_WIDETAG:
 563             case SIMPLE_ARRAY_UNSIGNED_BYTE_8_WIDETAG:
 564             case SIMPLE_ARRAY_UNSIGNED_BYTE_16_WIDETAG:
 565             case SIMPLE_ARRAY_UNSIGNED_BYTE_32_WIDETAG:
 566 #ifdef SIMPLE_ARRAY_SIGNED_BYTE_8_WIDETAG
 567             case SIMPLE_ARRAY_SIGNED_BYTE_8_WIDETAG:
 568 #endif
 569 #ifdef SIMPLE_ARRAY_SIGNED_BYTE_16_WIDETAG
 570             case SIMPLE_ARRAY_SIGNED_BYTE_16_WIDETAG:
 571 #endif
 572 #ifdef SIMPLE_ARRAY_SIGNED_BYTE_30_WIDETAG
 573             case SIMPLE_ARRAY_SIGNED_BYTE_30_WIDETAG:
 574 #endif
 575 #ifdef SIMPLE_ARRAY_SIGNED_BYTE_32_WIDETAG
 576             case SIMPLE_ARRAY_SIGNED_BYTE_32_WIDETAG:
 577 #endif
 578             case SIMPLE_ARRAY_SINGLE_FLOAT_WIDETAG:
 579             case SIMPLE_ARRAY_DOUBLE_FLOAT_WIDETAG:
 580 #ifdef SIMPLE_ARRAY_LONG_FLOAT_WIDETAG
 581             case SIMPLE_ARRAY_LONG_FLOAT_WIDETAG:
 582 #endif
 583 #ifdef SIMPLE_ARRAY_COMPLEX_SINGLE_FLOAT_WIDETAG
 584             case SIMPLE_ARRAY_COMPLEX_SINGLE_FLOAT_WIDETAG:
 585 #endif
 586 #ifdef SIMPLE_ARRAY_COMPLEX_DOUBLE_FLOAT_WIDETAG
 587             case SIMPLE_ARRAY_COMPLEX_DOUBLE_FLOAT_WIDETAG:
 588 #endif
 589 #ifdef SIMPLE_ARRAY_COMPLEX_LONG_FLOAT_WIDETAG
 590             case SIMPLE_ARRAY_COMPLEX_LONG_FLOAT_WIDETAG:
 591 #endif
 592             case COMPLEX_STRING_WIDETAG:
 593             case COMPLEX_BIT_VECTOR_WIDETAG:
 594             case COMPLEX_VECTOR_WIDETAG:
 595             case COMPLEX_ARRAY_WIDETAG:
 596                 break;
 597
 598             case CODE_HEADER_WIDETAG:
 599                 print_slots(code_slots, count-1, ptr);
 600                 break;
 601
 602             case SIMPLE_FUN_HEADER_WIDETAG:
 603             case CLOSURE_FUN_HEADER_WIDETAG:
 604                 print_slots(fn_slots, 5, ptr);
 605                 break;
 606
 607             case RETURN_PC_HEADER_WIDETAG:
 608                 print_obj("code: ", obj - (count * 4));
 609                 break;
 610
 611             case CLOSURE_HEADER_WIDETAG:
 612                 print_slots(closure_slots, count, ptr);
 613                 break;
 614
 615             case FUNCALLABLE_INSTANCE_HEADER_WIDETAG:
 616                 print_slots(funcallable_instance_slots, count, ptr);
 617                 break;
 618
 619             case VALUE_CELL_HEADER_WIDETAG:
 620                 print_slots(value_cell_slots, 1, ptr);
 621                 break;
 622
 623             case SAP_WIDETAG:
 624                 NEWLINE_OR_RETURN;
 625 #ifndef alpha
 626                 printf("0x%08lx", (unsigned long) *ptr);
 627 #else
 628                 printf("0x%016lx", *(lispobj*)(ptr+1));
 629 #endif
 630                 break;
 631
 632             case WEAK_POINTER_WIDETAG:
 633                 print_slots(weak_pointer_slots, 1, ptr);
 634                 break;
 635
 636             case BASE_CHAR_WIDETAG:
 637             case UNBOUND_MARKER_WIDETAG:
 638                 NEWLINE_OR_RETURN;
 639                 printf("pointer to an immediate?");
 640                 break;
 641
 642             case FDEFN_WIDETAG:
 643                 print_slots(fdefn_slots, count, ptr);
 644                 break;
 645
 646             default:
 647                 NEWLINE_OR_RETURN;
 648                 printf("Unknown header object?");
 649                 break;
 650         }
 651     }
 652 }
 653
 654 static void print_obj(char *prefix, lispobj obj)
 655 {
 656     static void (*verbose_fns[])(lispobj obj)
 657         = {print_fixnum, print_struct, print_otherimm, print_list,
 658            print_fixnum, print_otherptr, print_otherimm, print_otherptr};
 659     static void (*brief_fns[])(lispobj obj)
 660         = {brief_fixnum, brief_struct, brief_otherimm, brief_list,
 661            brief_fixnum, brief_otherptr, brief_otherimm, brief_otherptr};
 662     int type = lowtag_of(obj);
 663     struct var *var = lookup_by_obj(obj);
 664     char buffer[256];
 665     boolean verbose = cur_depth < brief_depth;
 666
 667     if (!continue_p(verbose))
 668         return;
 669
 670     if (var != NULL && var_clock(var) == cur_clock)
 671         dont_descend = 1;
 672
 673     if (var == NULL &&
 674         /* FIXME: What does this "x & y & z & .." expression mean? */
 675         (obj & FUN_POINTER_LOWTAG & LIST_POINTER_LOWTAG & INSTANCE_POINTER_LOWTAG & OTHER_POINTER_LOWTAG) != 0)
 676         var = define_var(NULL, obj, 0);
 677
 678     if (var != NULL)
 679         var_setclock(var, cur_clock);
 680
 681     cur_depth++;
 682     if (verbose) {
 683         if (var != NULL) {
 684             sprintf(buffer, "$%s=", var_name(var));
 685             newline(buffer);
 686         }
 687         else
 688             newline(NULL);
 689         printf("%s0x%08lx: ", prefix, (unsigned long) obj);
 690         if (cur_depth < brief_depth) {
 691             fputs(lowtag_Names[type], stdout);
 692             (*verbose_fns[type])(obj);
 693         }
 694         else
 695             (*brief_fns[type])(obj);
 696     }
 697     else {
 698         if (dont_descend)
 699             printf("$%s", var_name(var));
 700         else {
 701             if (var != NULL)
 702                 printf("$%s=", var_name(var));
 703             (*brief_fns[type])(obj);
 704         }
 705     }
 706     cur_depth--;
 707     dont_descend = 0;
 708 }
 709
 710 void reset_printer()
 711 {
 712     cur_clock++;
 713     cur_lines = 0;
 714     dont_descend = 0;
 715 }
 716
 717 void print(lispobj obj)
 718 {
 719     skip_newline = 1;
 720     cur_depth = 0;
 721     max_depth = 5;
 722     max_lines = 20;
 723
 724     print_obj("", obj);
 725
 726     putchar('\n');
 727 }
 728
 729 void brief_print(lispobj obj)
 730 {
 731     skip_newline = 1;
 732     cur_depth = 0;
 733     max_depth = 1;
 734     max_lines = 5000;
 735
 736     print_obj("", obj);
 737     putchar('\n');
 738 }
 739
 740 #else
 741
 742 void
 743 brief_print(lispobj obj)
 744 {
 745     printf("lispobj 0x%lx\n", (unsigned long)obj);
 746 }
 747
 748 #endif /* defined(LISP_FEATURE_SB_LDB) */