libguile/debug.c

   1  /* Debugging extensions for Guile
   2  * Copyright (C) 1995, 1996, 1997, 1998, 1999 Free Software Foundation
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2, or (at your option)
   7  * any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this software; see the file COPYING.  If not, write to
  16  * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  17  * Boston, MA 02111-1307 USA
  18  *
  19  * As a special exception, the Free Software Foundation gives permission
  20  * for additional uses of the text contained in its release of GUILE.
  21  *
  22  * The exception is that, if you link the GUILE library with other files
  23  * to produce an executable, this does not by itself cause the
  24  * resulting executable to be covered by the GNU General Public License.
  25  * Your use of that executable is in no way restricted on account of
  26  * linking the GUILE library code into it.
  27  *
  28  * This exception does not however invalidate any other reasons why
  29  * the executable file might be covered by the GNU General Public License.
  30  *
  31  * This exception applies only to the code released by the
  32  * Free Software Foundation under the name GUILE.  If you copy
  33  * code from other Free Software Foundation releases into a copy of
  34  * GUILE, as the General Public License permits, the exception does
  35  * not apply to the code that you add in this way.  To avoid misleading
  36  * anyone as to the status of such modified files, you must delete
  37  * this exception notice from them.
  38  *
  39  * If you write modifications of your own for GUILE, it is your choice
  40  * whether to permit this exception to apply to your modifications.
  41  * If you do not wish that, delete this exception notice.
  42  *
  43  * The author can be reached at djurfeldt@nada.kth.se
  44  * Mikael Djurfeldt, SANS/NADA KTH, 10044 STOCKHOLM, SWEDEN */
  45
  46 /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
  47    gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
  48
  49
  50 #include <stdio.h>
  51 #include "_scm.h"
  52 #include "eval.h"
  53 #include "stackchk.h"
  54 #include "throw.h"
  55 #include "macros.h"
  56 #include "smob.h"
  57 #include "procprop.h"
  58 #include "srcprop.h"
  59 #include "alist.h"
  60 #include "continuations.h"
  61 #include "strports.h"
  62 #include "read.h"
  63 #include "feature.h"
  64 #include "dynwind.h"
  65 #include "modules.h"
  66 #include "ports.h"
  67
  68 #include "validate.h"
  69 #include "debug.h"
  70 \f
  71
  72 /* {Run time control of the debugging evaluator}
  73  */
  74
  75 SCM_DEFINE (scm_debug_options, "debug-options-interface", 0, 1, 0,
  76             (SCM setting),
  77 "")
  78 #define FUNC_NAME s_scm_debug_options
  79 {
  80   SCM ans;
  81   SCM_DEFER_INTS;
  82   ans = scm_options (setting,
  83                      scm_debug_opts,
  84                      SCM_N_DEBUG_OPTIONS,
  85                      FUNC_NAME);
  86 #ifndef SCM_RECKLESS
  87   if (!(1 <= SCM_N_FRAMES && SCM_N_FRAMES <= SCM_MAX_FRAME_SIZE))
  88     {
  89       scm_options (ans, scm_debug_opts, SCM_N_DEBUG_OPTIONS, FUNC_NAME);
  90       SCM_OUT_OF_RANGE (1, setting);
  91     }
  92 #endif
  93   SCM_RESET_DEBUG_MODE;
  94   scm_stack_checking_enabled_p = SCM_STACK_CHECKING_P;
  95   scm_debug_eframe_size = 2 * SCM_N_FRAMES;
  96   SCM_ALLOW_INTS;
  97   return ans;
  98 }
  99 #undef FUNC_NAME
 100
 101 static void
 102 with_traps_before (void *data)
 103 {
 104   int *trap_flag = data;
 105   *trap_flag = SCM_TRAPS_P;
 106   SCM_TRAPS_P = 1;
 107 }
 108
 109 static void
 110 with_traps_after (void *data)
 111 {
 112   int *trap_flag = data;
 113   SCM_TRAPS_P = *trap_flag;
 114 }
 115
 116 static SCM
 117 with_traps_inner (void *data)
 118 {
 119   SCM thunk = (SCM) data;
 120   return scm_apply (thunk, SCM_EOL, SCM_EOL);
 121 }
 122
 123 SCM_DEFINE (scm_with_traps, "with-traps", 1, 0, 0,
 124             (SCM thunk),
 125 "")
 126 #define FUNC_NAME s_scm_with_traps
 127 {
 128   int trap_flag;
 129   SCM_VALIDATE_THUNK (1,thunk);
 130   return scm_internal_dynamic_wind (with_traps_before,
 131                                     with_traps_inner,
 132                                     with_traps_after,
 133                                     (void *) thunk,
 134                                     &trap_flag);
 135 }
 136 #undef FUNC_NAME
 137
 138 \f
 139 static SCM scm_sym_source, scm_sym_dots;
 140 static SCM scm_sym_procname;
 141
 142 /* {Memoized Source}
 143  */
 144
 145 long scm_tc16_memoized;
 146
 147
 148 static int
 149 prinmemoized (SCM obj,SCM port,scm_print_state *pstate)
 150 {
 151   int writingp = SCM_WRITINGP (pstate);
 152   scm_puts ("#<memoized ", port);
 153   SCM_SET_WRITINGP (pstate, 1);
 154 #ifdef GUILE_DEBUG
 155   scm_iprin1 (SCM_MEMOIZED_EXP (obj), port, pstate);
 156 #else
 157   scm_iprin1 (scm_unmemoize (obj), port, pstate);
 158 #endif
 159   SCM_SET_WRITINGP (pstate, writingp);
 160   scm_putc ('>', port);
 161   return 1;
 162 }
 163
 164 SCM_DEFINE (scm_memoized_p, "memoized?", 1, 0, 0,
 165             (SCM obj),
 166 "")
 167 #define FUNC_NAME s_scm_memoized_p
 168 {
 169   return SCM_BOOL(SCM_MEMOIZEDP (obj));
 170 }
 171 #undef FUNC_NAME
 172
 173 SCM
 174 scm_make_memoized (SCM exp, SCM env)
 175 {
 176   /* *fixme* Check that env is a valid environment. */
 177   register SCM z, ans;
 178   SCM_ENTER_A_SECTION;
 179   SCM_NEWSMOB (z, exp, env);
 180   SCM_NEWSMOB (ans, scm_tc16_memoized, z);
 181   SCM_EXIT_A_SECTION;
 182   return ans;
 183 }
 184
 185 #ifdef GUILE_DEBUG
 186 /*
 187  * Some primitives for construction of memoized code
 188  *
 189  * - procedure: memcons CAR CDR [ENV]
 190  *
 191  *     Construct a pair, encapsulated in a memoized object.
 192  *
 193  *     The CAR and CDR can be either normal or memoized.  If ENV isn't
 194  *     specified, the top-level environment of the current module will
 195  *     be assumed.  All environments must match.
 196  *
 197  * - procedure: make-gloc VARIABLE [ENV]
 198  *
 199  *     Return a gloc, encapsulated in a memoized object.
 200  *
 201  *     (Glocs can't exist in normal list structures, since they will
 202  *     be mistaken for structs.)
 203  *
 204  * - procedure: gloc? OBJECT
 205  *
 206  *     Return #t if OBJECT is a memoized gloc.
 207  *
 208  * - procedure: make-iloc FRAME BINDING CDRP
 209  *
 210  *     Return an iloc referring to frame no. FRAME, binding
 211  *     no. BINDING.  If CDRP is non-#f, the iloc is referring to a
 212  *     frame consisting of a single pair, with the value stored in the
 213  *     CDR.
 214  *
 215  * - procedure: iloc? OBJECT
 216  *
 217  *     Return #t if OBJECT is an iloc.
 218  *
 219  * - procedure: mem->proc MEMOIZED
 220  *
 221  *     Construct a closure from the memoized lambda expression MEMOIZED
 222  *
 223  *     WARNING! The code is not copied!
 224  *
 225  * - procedure: proc->mem CLOSURE
 226  *
 227  *     Turn the closure CLOSURE into a memoized object.
 228  *
 229  *     WARNING! The code is not copied!
 230  *
 231  * - constant: SCM_IM_AND
 232  * - constant: SCM_IM_BEGIN
 233  * - constant: SCM_IM_CASE
 234  * - constant: SCM_IM_COND
 235  * - constant: SCM_IM_DO
 236  * - constant: SCM_IM_IF
 237  * - constant: SCM_IM_LAMBDA
 238  * - constant: SCM_IM_LET
 239  * - constant: SCM_IM_LETSTAR
 240  * - constant: SCM_IM_LETREC
 241  * - constant: SCM_IM_OR
 242  * - constant: SCM_IM_QUOTE
 243  * - constant: SCM_IM_SET
 244  * - constant: SCM_IM_DEFINE
 245  * - constant: SCM_IM_APPLY
 246  * - constant: SCM_IM_CONT
 247  * - constant: SCM_IM_DISPATCH
 248  */
 249
 250 #include "variable.h"
 251 #include "procs.h"
 252
 253 SCM_DEFINE (scm_make_gloc, "make-gloc", 1, 1, 0,
 254             (SCM var, SCM env),
 255 "")
 256 #define FUNC_NAME s_scm_make_gloc
 257 {
 258 #if 1 /* Unsafe */
 259   if (SCM_CONSP (var))
 260     var = scm_cons (SCM_BOOL_F, var);
 261   else
 262 #endif
 263     SCM_VALIDATE_VARIABLE (1,var);
 264   if (SCM_UNBNDP (env))
 265     env = scm_top_level_env (SCM_CDR (scm_top_level_lookup_closure_var));
 266   else
 267     SCM_VALIDATE_NULLORCONS (2,env);
 268   return scm_make_memoized (SCM_VARVCELL (var) + 1, env);
 269 }
 270 #undef FUNC_NAME
 271
 272 SCM_DEFINE (scm_gloc_p, "gloc?", 1, 0, 0,
 273             (SCM obj),
 274 "")
 275 #define FUNC_NAME s_scm_gloc_p
 276 {
 277   return SCM_BOOL((SCM_MEMOIZEDP (obj)
 278                    && (SCM_UNPACK(SCM_MEMOIZED_EXP (obj)) & 7) == 1));
 279 }
 280 #undef FUNC_NAME
 281
 282 SCM_DEFINE (scm_make_iloc, "make-iloc", 3, 0, 0,
 283             (SCM frame, SCM binding, SCM cdrp),
 284 "")
 285 #define FUNC_NAME s_scm_make_iloc
 286 {
 287   SCM_VALIDATE_INUM (1,frame);
 288   SCM_VALIDATE_INUM (2,binding);
 289   return (SCM_ILOC00
 290           + SCM_IFRINC * SCM_INUM (frame)
 291           + (SCM_NFALSEP (cdrp) ? SCM_ICDR : 0)
 292           + SCM_IDINC * SCM_INUM (binding));
 293 }
 294 #undef FUNC_NAME
 295
 296 SCM_DEFINE (scm_iloc_p, "iloc?", 1, 0, 0,
 297           (SCM obj),
 298 "")
 299 #define FUNC_NAME s_scm_iloc_p
 300 {
 301   return SCM_BOOL(SCM_ILOCP (obj));
 302 }
 303 #undef FUNC_NAME
 304
 305 SCM_DEFINE (scm_memcons, "memcons", 2, 1, 0,
 306             (SCM car, SCM cdr, SCM env),
 307 "")
 308 #define FUNC_NAME s_scm_memcons
 309 {
 310   if (SCM_MEMOIZEDP (car))
 311     {
 312       /*fixme* environments may be two different but equal top-level envs */
 313       if (!SCM_UNBNDP (env) && SCM_MEMOIZED_ENV (car) != env)
 314         SCM_MISC_ERROR ("environment mismatch arg1 <-> arg3",
 315                         scm_cons2 (car, env, SCM_EOL));
 316       else
 317         env = SCM_MEMOIZED_ENV (car);
 318       car = SCM_MEMOIZED_EXP (car);
 319     }
 320   if (SCM_MEMOIZEDP (cdr))
 321     {
 322       if (!SCM_UNBNDP (env) && SCM_MEMOIZED_ENV (cdr) != env)
 323         SCM_MISC_ERROR ("environment mismatch arg2 <-> arg3",
 324                         scm_cons2 (cdr, env, SCM_EOL));
 325       else
 326         env = SCM_MEMOIZED_ENV (cdr);
 327       cdr = SCM_MEMOIZED_EXP (cdr);
 328     }
 329   if (SCM_UNBNDP (env))
 330     env = scm_top_level_env (SCM_CDR (scm_top_level_lookup_closure_var));
 331   else
 332     SCM_VALIDATE_NULLORCONS (3,env);
 333   return scm_make_memoized (scm_cons (car, cdr), env);
 334 }
 335 #undef FUNC_NAME
 336
 337 SCM_DEFINE (scm_mem_to_proc, "mem->proc", 1, 0, 0,
 338             (SCM obj),
 339 "")
 340 #define FUNC_NAME s_scm_mem_to_proc
 341 {
 342   SCM env;
 343   SCM_VALIDATE_MEMOIZED (1,obj);
 344   env = SCM_MEMOIZED_ENV (obj);
 345   obj = SCM_MEMOIZED_EXP (obj);
 346   if (!(SCM_NIMP (obj) && SCM_CAR (obj) == SCM_IM_LAMBDA))
 347     SCM_MISC_ERROR ("expected lambda expression",
 348                     scm_cons (obj, SCM_EOL));
 349   return scm_closure (SCM_CDR (obj), env);
 350 }
 351 #undef FUNC_NAME
 352
 353 SCM_DEFINE (scm_proc_to_mem, "proc->mem", 1, 0, 0,
 354             (SCM obj),
 355 "")
 356 #define FUNC_NAME s_scm_proc_to_mem
 357 {
 358   SCM_VALIDATE_CLOSURE (1, obj);
 359   return scm_make_memoized (scm_cons (SCM_IM_LAMBDA, SCM_CODE (obj)),
 360                             SCM_ENV (obj));
 361 }
 362 #undef FUNC_NAME
 363
 364 #endif /* GUILE_DEBUG */
 365
 366 SCM_DEFINE (scm_unmemoize, "unmemoize", 1, 0, 0,
 367             (SCM m),
 368 "")
 369 #define FUNC_NAME s_scm_unmemoize
 370 {
 371   SCM_VALIDATE_MEMOIZED (1,m);
 372   return scm_unmemocopy (SCM_MEMOIZED_EXP (m), SCM_MEMOIZED_ENV (m));
 373 }
 374 #undef FUNC_NAME
 375
 376 SCM_DEFINE (scm_memoized_environment, "memoized-environment", 1, 0, 0,
 377             (SCM m),
 378 "")
 379 #define FUNC_NAME s_scm_memoized_environment
 380 {
 381   SCM_VALIDATE_MEMOIZED (1,m);
 382   return SCM_MEMOIZED_ENV (m);
 383 }
 384 #undef FUNC_NAME
 385
 386 SCM_DEFINE (scm_procedure_name, "procedure-name", 1, 0, 0,
 387             (SCM proc),
 388 "")
 389 #define FUNC_NAME s_scm_procedure_name
 390 {
 391   SCM_VALIDATE_PROC (1,proc);
 392   switch (SCM_TYP7 (proc)) {
 393   case scm_tcs_subrs:
 394     return SCM_SNAME (proc);
 395   default:
 396     {
 397       SCM name = scm_procedure_property (proc, scm_sym_name);
 398 #if 0
 399       /* Source property scm_sym_procname not implemented yet... */
 400       SCM name = scm_source_property (SCM_CAR (SCM_CDR (SCM_CODE (proc))), scm_sym_procname);
 401       if (SCM_FALSEP (name))
 402         name = scm_procedure_property (proc, scm_sym_name);
 403 #endif
 404       if (SCM_FALSEP (name) && SCM_CLOSUREP (proc))
 405         name = scm_reverse_lookup (SCM_ENV (proc), proc);
 406       return name;
 407     }
 408   }
 409 }
 410 #undef FUNC_NAME
 411
 412 SCM_DEFINE (scm_procedure_source, "procedure-source", 1, 0, 0,
 413             (SCM proc),
 414 "")
 415 #define FUNC_NAME s_scm_procedure_source
 416 {
 417   SCM_VALIDATE_NIM (1,proc);
 418   switch (SCM_TYP7 (proc)) {
 419   case scm_tcs_closures:
 420     {
 421       SCM src;
 422       src = scm_source_property (SCM_CDR (SCM_CODE (proc)), scm_sym_copy);
 423       if (src != SCM_BOOL_F)
 424         return scm_cons2 (scm_sym_lambda, SCM_CAR (SCM_CODE (proc)), src);
 425       src = SCM_CODE (proc);
 426       return scm_cons (scm_sym_lambda,
 427                        scm_unmemocopy (src,
 428                                        SCM_EXTEND_ENV (SCM_CAR (src),
 429                                                            SCM_EOL,
 430                                                            SCM_ENV (proc))));
 431     }
 432   case scm_tc7_contin:
 433   case scm_tcs_subrs:
 434 #ifdef CCLO
 435   case scm_tc7_cclo:
 436 #endif
 437     /* It would indeed be a nice thing if we supplied source even for
 438        built in procedures! */
 439     return scm_procedure_property (proc, scm_sym_source);
 440   default:
 441     SCM_WTA(1,proc);
 442     return 0;
 443   }
 444 }
 445 #undef FUNC_NAME
 446
 447 SCM_DEFINE (scm_procedure_environment, "procedure-environment", 1, 0, 0,
 448             (SCM proc),
 449 "")
 450 #define FUNC_NAME s_scm_procedure_environment
 451 {
 452   SCM_VALIDATE_NIM (1,proc);
 453   switch (SCM_TYP7 (proc)) {
 454   case scm_tcs_closures:
 455     return SCM_ENV (proc);
 456   case scm_tc7_contin:
 457   case scm_tcs_subrs:
 458 #ifdef CCLO
 459   case scm_tc7_cclo:
 460 #endif
 461     return SCM_EOL;
 462   default:
 463     SCM_WTA(1,proc);
 464     return 0;
 465   }
 466 }
 467 #undef FUNC_NAME
 468
 469 \f
 470
 471 /* Eval in a local environment.  We would like to have the ability to
 472  * evaluate in a specified local environment, but due to the
 473  * memoization this isn't normally possible.  We solve it by copying
 474  * the code before evaluating.  One solution would be to have eval.c
 475  * generate yet another evaluator.  They are not very big actually.
 476  */
 477 SCM_DEFINE (scm_local_eval, "local-eval", 1, 1, 0,
 478             (SCM exp, SCM env),
 479             "Evaluate @var{exp} in its environment.  If @var{env} is supplied,\n"
 480             "it is the environment in which to evaluate @var{exp}.  Otherwise,\n"
 481             "@var{exp} must be a memoized code object (in which case, its environment\n"
 482             "is implicit).")
 483 #define FUNC_NAME s_scm_local_eval
 484 {
 485   if (SCM_UNBNDP (env))
 486   {
 487     SCM_VALIDATE_MEMOIZED (1,exp);
 488     return scm_eval_3 (SCM_MEMOIZED_EXP (exp), 0, SCM_MEMOIZED_ENV (exp));
 489   }
 490   return scm_eval_3 (exp, 1, env);
 491 }
 492 #undef FUNC_NAME
 493
 494 #if 0
 495 SCM_REGISTER_PROC (s_reverse_lookup, "reverse-lookup", 2, 0, 0, scm_reverse_lookup);
 496 #endif
 497
 498 SCM
 499 scm_reverse_lookup (SCM env, SCM data)
 500 {
 501   SCM names, values;
 502   while (SCM_NIMP (env) && SCM_SLOPPY_CONSP (SCM_CAR (env)))
 503     {
 504       names = SCM_CAAR (env);
 505       values = SCM_CDAR (env);
 506       while (SCM_CONSP (names))
 507         {
 508           if (SCM_CAR (values) == data)
 509             return SCM_CAR (names);
 510           names = SCM_CDR (names);
 511           values = SCM_CDR (values);
 512         }
 513       if (names != SCM_EOL && values == data)
 514         return names;
 515       env = SCM_CDR (env);
 516     }
 517   return SCM_BOOL_F;
 518 }
 519
 520 SCM
 521 scm_start_stack (SCM id, SCM exp, SCM env)
 522 {
 523   SCM answer;
 524   scm_debug_frame vframe;
 525   scm_debug_info vframe_vect_body;
 526   vframe.prev = scm_last_debug_frame;
 527   vframe.status = SCM_VOIDFRAME;
 528   vframe.vect = &vframe_vect_body;
 529   vframe.vect[0].id = id;
 530   scm_last_debug_frame = &vframe;
 531   answer = scm_eval_3 (exp, 1, env);
 532   scm_last_debug_frame = vframe.prev;
 533   return answer;
 534 }
 535
 536 SCM_SYNTAX(s_start_stack, "start-stack", scm_makacro, scm_m_start_stack);
 537
 538 static SCM
 539 scm_m_start_stack (SCM exp, SCM env)
 540 {
 541   exp = SCM_CDR (exp);
 542   SCM_ASSERT (SCM_ECONSP (exp)
 543               && SCM_ECONSP (SCM_CDR (exp))
 544               && SCM_NULLP (SCM_CDDR (exp)),
 545               exp,
 546               SCM_WNA,
 547               s_start_stack);
 548   return scm_start_stack (scm_eval_car (exp, env), SCM_CADR (exp), env);
 549 }
 550
 551 /* {Debug Objects}
 552  *
 553  * The debugging evaluator throws these on frame traps.
 554  */
 555
 556 long scm_tc16_debugobj;
 557
 558 static int
 559 prindebugobj (SCM obj,SCM port,scm_print_state *pstate)
 560 {
 561   scm_puts ("#<debug-object ", port);
 562   scm_intprint ((int) SCM_DEBUGOBJ_FRAME (obj), 16, port);
 563   scm_putc ('>', port);
 564   return 1;
 565 }
 566
 567 SCM_DEFINE (scm_debug_object_p, "debug-object?", 1, 0, 0,
 568             (SCM obj),
 569             "")
 570 #define FUNC_NAME s_scm_debug_object_p
 571 {
 572   return SCM_BOOL(SCM_DEBUGOBJP (obj));
 573 }
 574 #undef FUNC_NAME
 575
 576
 577 SCM
 578 scm_make_debugobj (scm_debug_frame *frame)
 579 {
 580   register SCM z;
 581   SCM_NEWCELL (z);
 582   SCM_ENTER_A_SECTION;
 583   SCM_SET_DEBUGOBJ_FRAME (z, (SCM) frame);
 584   SCM_SETCAR (z, scm_tc16_debugobj);
 585   SCM_EXIT_A_SECTION;
 586   return z;
 587 }
 588
 589 \f
 590
 591 /* Undocumented debugging procedure */
 592 #ifdef GUILE_DEBUG
 593 SCM_DEFINE (scm_debug_hang, "debug-hang", 0, 1, 0,
 594             (SCM obj),
 595             "")
 596 #define FUNC_NAME s_scm_debug_hang
 597 {
 598   int go = 0;
 599   while (!go) ;
 600   return SCM_UNSPECIFIED;
 601 }
 602 #undef FUNC_NAME
 603 #endif
 604
 605 \f
 606
 607 void
 608 scm_init_debug ()
 609 {
 610   scm_init_opts (scm_debug_options, scm_debug_opts, SCM_N_DEBUG_OPTIONS);
 611
 612   scm_tc16_memoized = scm_make_smob_type_mfpe ("memoized", 0,
 613                                               scm_markcdr, NULL, prinmemoized, NULL);
 614
 615   scm_tc16_debugobj = scm_make_smob_type_mfpe ("debug-object", 0,
 616                                               NULL, NULL, prindebugobj, NULL);
 617
 618   scm_sym_procname = SCM_CAR (scm_sysintern ("procname", SCM_UNDEFINED));
 619   scm_sym_dots = SCM_CAR (scm_sysintern ("...", SCM_UNDEFINED));
 620   scm_sym_source = SCM_CAR (scm_sysintern ("source", SCM_UNDEFINED));
 621
 622 #ifdef GUILE_DEBUG
 623   scm_sysintern ("SCM_IM_AND", SCM_IM_AND);
 624   scm_sysintern ("SCM_IM_BEGIN", SCM_IM_BEGIN);
 625   scm_sysintern ("SCM_IM_CASE", SCM_IM_CASE);
 626   scm_sysintern ("SCM_IM_COND", SCM_IM_COND);
 627   scm_sysintern ("SCM_IM_DO", SCM_IM_DO);
 628   scm_sysintern ("SCM_IM_IF", SCM_IM_IF);
 629   scm_sysintern ("SCM_IM_LAMBDA", SCM_IM_LAMBDA);
 630   scm_sysintern ("SCM_IM_LET", SCM_IM_LET);
 631   scm_sysintern ("SCM_IM_LETSTAR", SCM_IM_LETSTAR);
 632   scm_sysintern ("SCM_IM_LETREC", SCM_IM_LETREC);
 633   scm_sysintern ("SCM_IM_OR", SCM_IM_OR);
 634   scm_sysintern ("SCM_IM_QUOTE", SCM_IM_QUOTE);
 635   scm_sysintern ("SCM_IM_SET_X", SCM_IM_SET_X);
 636   scm_sysintern ("SCM_IM_DEFINE", SCM_IM_DEFINE);
 637   scm_sysintern ("SCM_IM_APPLY", SCM_IM_APPLY);
 638   scm_sysintern ("SCM_IM_CONT", SCM_IM_CONT);
 639   scm_sysintern ("SCM_IM_DISPATCH", SCM_IM_DISPATCH);
 640 #endif
 641   scm_add_feature ("debug-extensions");
 642
 643 #include "debug.x"
 644 }
 645
 646 /*
 647   Local Variables:
 648   c-file-style: "gnu"
 649   End:
 650 */