libguile/debug.c

   1 /* Debugging extensions for Guile
   2  * Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2002, 2003 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
  47
  48 #include "libguile/_scm.h"
  49 #include "libguile/eval.h"
  50 #include "libguile/list.h"
  51 #include "libguile/stackchk.h"
  52 #include "libguile/throw.h"
  53 #include "libguile/macros.h"
  54 #include "libguile/smob.h"
  55 #include "libguile/procprop.h"
  56 #include "libguile/srcprop.h"
  57 #include "libguile/alist.h"
  58 #include "libguile/continuations.h"
  59 #include "libguile/strports.h"
  60 #include "libguile/read.h"
  61 #include "libguile/feature.h"
  62 #include "libguile/dynwind.h"
  63 #include "libguile/modules.h"
  64 #include "libguile/ports.h"
  65 #include "libguile/root.h"
  66 #include "libguile/fluids.h"
  67 #include "libguile/objects.h"
  68
  69 #include "libguile/validate.h"
  70 #include "libguile/debug.h"
  71 \f
  72
  73 /* {Run time control of the debugging evaluator}
  74  */
  75
  76 SCM_DEFINE (scm_debug_options, "debug-options-interface", 0, 1, 0,
  77             (SCM setting),
  78             "Option interface for the debug options. Instead of using\n"
  79             "this procedure directly, use the procedures @code{debug-enable},\n"
  80             "@code{debug-disable}, @code{debug-set!} and @code{debug-options}.")
  81 #define FUNC_NAME s_scm_debug_options
  82 {
  83   SCM ans;
  84   SCM_DEFER_INTS;
  85   ans = scm_options (setting, scm_debug_opts, SCM_N_DEBUG_OPTIONS, FUNC_NAME);
  86   if (!(1 <= SCM_N_FRAMES && SCM_N_FRAMES <= SCM_MAX_FRAME_SIZE))
  87     {
  88       scm_options (ans, scm_debug_opts, SCM_N_DEBUG_OPTIONS, FUNC_NAME);
  89       SCM_OUT_OF_RANGE (1, setting);
  90     }
  91   SCM_RESET_DEBUG_MODE;
  92   scm_stack_checking_enabled_p = SCM_STACK_CHECKING_P;
  93   scm_debug_eframe_size = 2 * SCM_N_FRAMES;
  94   SCM_ALLOW_INTS;
  95   return ans;
  96 }
  97 #undef FUNC_NAME
  98
  99 static void
 100 with_traps_before (void *data)
 101 {
 102   int *trap_flag = data;
 103   *trap_flag = SCM_TRAPS_P;
 104   SCM_TRAPS_P = 1;
 105 }
 106
 107 static void
 108 with_traps_after (void *data)
 109 {
 110   int *trap_flag = data;
 111   SCM_TRAPS_P = *trap_flag;
 112 }
 113
 114 static SCM
 115 with_traps_inner (void *data)
 116 {
 117   SCM thunk = SCM_PACK (data);
 118   return scm_call_0 (thunk);
 119 }
 120
 121 SCM_DEFINE (scm_with_traps, "with-traps", 1, 0, 0,
 122             (SCM thunk),
 123             "Call @var{thunk} with traps enabled.")
 124 #define FUNC_NAME s_scm_with_traps
 125 {
 126   int trap_flag;
 127   SCM_VALIDATE_THUNK (1, thunk);
 128   return scm_internal_dynamic_wind (with_traps_before,
 129                                     with_traps_inner,
 130                                     with_traps_after,
 131                                     (void *) SCM_UNPACK (thunk),
 132                                     &trap_flag);
 133 }
 134 #undef FUNC_NAME
 135
 136 \f
 137
 138 SCM_SYMBOL (scm_sym_procname, "procname");
 139 SCM_SYMBOL (scm_sym_dots, "...");
 140 SCM_SYMBOL (scm_sym_source, "source");
 141
 142 /* {Memoized Source}
 143  */
 144
 145 scm_t_bits scm_tc16_memoized;
 146
 147 static int
 148 memoized_print (SCM obj, SCM port, scm_print_state *pstate)
 149 {
 150   int writingp = SCM_WRITINGP (pstate);
 151   scm_puts ("#<memoized ", port);
 152   SCM_SET_WRITINGP (pstate, 1);
 153 #ifdef GUILE_DEBUG
 154   scm_iprin1 (SCM_MEMOIZED_EXP (obj), port, pstate);
 155 #else
 156   scm_iprin1 (scm_unmemoize (obj), port, pstate);
 157 #endif
 158   SCM_SET_WRITINGP (pstate, writingp);
 159   scm_putc ('>', port);
 160   return 1;
 161 }
 162
 163 SCM_DEFINE (scm_memoized_p, "memoized?", 1, 0, 0,
 164             (SCM obj),
 165             "Return @code{#t} if @var{obj} is memoized.")
 166 #define FUNC_NAME s_scm_memoized_p
 167 {
 168   return SCM_BOOL(SCM_MEMOIZEDP (obj));
 169 }
 170 #undef FUNC_NAME
 171
 172 SCM
 173 scm_make_memoized (SCM exp, SCM env)
 174 {
 175   /* *fixme* Check that env is a valid environment. */
 176   register SCM z, ans;
 177   SCM_ENTER_A_SECTION;
 178   SCM_NEWSMOB (z, SCM_UNPACK (exp), SCM_UNPACK (env));
 179   SCM_NEWSMOB (ans, scm_tc16_memoized, SCM_UNPACK (z));
 180   SCM_EXIT_A_SECTION;
 181   return ans;
 182 }
 183
 184 #ifdef GUILE_DEBUG
 185 /*
 186  * Some primitives for construction of memoized code
 187  *
 188  * - procedure: memcons CAR CDR [ENV]
 189  *
 190  *     Construct a pair, encapsulated in a memoized object.
 191  *
 192  *     The CAR and CDR can be either normal or memoized.  If ENV isn't
 193  *     specified, the top-level environment of the current module will
 194  *     be assumed.  All environments must match.
 195  *
 196  * - procedure: make-iloc FRAME BINDING CDRP
 197  *
 198  *     Return an iloc referring to frame no. FRAME, binding
 199  *     no. BINDING.  If CDRP is non-#f, the iloc is referring to a
 200  *     frame consisting of a single pair, with the value stored in the
 201  *     CDR.
 202  *
 203  * - procedure: iloc? OBJECT
 204  *
 205  *     Return #t if OBJECT is an iloc.
 206  *
 207  * - procedure: mem->proc MEMOIZED
 208  *
 209  *     Construct a closure from the memoized lambda expression MEMOIZED
 210  *
 211  *     WARNING! The code is not copied!
 212  *
 213  * - procedure: proc->mem CLOSURE
 214  *
 215  *     Turn the closure CLOSURE into a memoized object.
 216  *
 217  *     WARNING! The code is not copied!
 218  *
 219  * - constant: SCM_IM_AND
 220  * - constant: SCM_IM_BEGIN
 221  * - constant: SCM_IM_CASE
 222  * - constant: SCM_IM_COND
 223  * - constant: SCM_IM_DO
 224  * - constant: SCM_IM_IF
 225  * - constant: SCM_IM_LAMBDA
 226  * - constant: SCM_IM_LET
 227  * - constant: SCM_IM_LETSTAR
 228  * - constant: SCM_IM_LETREC
 229  * - constant: SCM_IM_OR
 230  * - constant: SCM_IM_QUOTE
 231  * - constant: SCM_IM_SET
 232  * - constant: SCM_IM_DEFINE
 233  * - constant: SCM_IM_APPLY
 234  * - constant: SCM_IM_CONT
 235  * - constant: SCM_IM_DISPATCH
 236  */
 237
 238 #include "libguile/variable.h"
 239 #include "libguile/procs.h"
 240
 241 SCM_DEFINE (scm_make_iloc, "make-iloc", 3, 0, 0,
 242             (SCM frame, SCM binding, SCM cdrp),
 243             "Return a new iloc with frame offset @var{frame}, binding\n"
 244             "offset @var{binding} and the cdr flag @var{cdrp}.")
 245 #define FUNC_NAME s_scm_make_iloc
 246 {
 247   SCM_VALIDATE_INUM (1, frame);
 248   SCM_VALIDATE_INUM (2, binding);
 249   return SCM_MAKE_ILOC (SCM_INUM (frame),
 250                         SCM_INUM (binding),
 251                         !SCM_FALSEP (cdrp));
 252 }
 253 #undef FUNC_NAME
 254
 255 SCM_DEFINE (scm_iloc_p, "iloc?", 1, 0, 0,
 256           (SCM obj),
 257             "Return @code{#t} if @var{obj} is an iloc.")
 258 #define FUNC_NAME s_scm_iloc_p
 259 {
 260   return SCM_BOOL(SCM_ILOCP (obj));
 261 }
 262 #undef FUNC_NAME
 263
 264 SCM_DEFINE (scm_memcons, "memcons", 2, 1, 0,
 265             (SCM car, SCM cdr, SCM env),
 266             "Return a new memoized cons cell with @var{car} and @var{cdr}\n"
 267             "as members and @var{env} as the environment.")
 268 #define FUNC_NAME s_scm_memcons
 269 {
 270   if (SCM_MEMOIZEDP (car))
 271     {
 272       /*fixme* environments may be two different but equal top-level envs */
 273       if (!SCM_UNBNDP (env) && SCM_MEMOIZED_ENV (car) != env)
 274         SCM_MISC_ERROR ("environment mismatch arg1 <-> arg3",
 275                         scm_list_2 (car, env));
 276       else
 277         env = SCM_MEMOIZED_ENV (car);
 278       car = SCM_MEMOIZED_EXP (car);
 279     }
 280   if (SCM_MEMOIZEDP (cdr))
 281     {
 282       if (!SCM_UNBNDP (env) && SCM_MEMOIZED_ENV (cdr) != env)
 283         SCM_MISC_ERROR ("environment mismatch arg2 <-> arg3",
 284                         scm_list_2 (cdr, env));
 285       else
 286         env = SCM_MEMOIZED_ENV (cdr);
 287       cdr = SCM_MEMOIZED_EXP (cdr);
 288     }
 289   if (SCM_UNBNDP (env))
 290     env = scm_top_level_env (SCM_TOP_LEVEL_LOOKUP_CLOSURE);
 291   else
 292     SCM_VALIDATE_NULLORCONS (3, env);
 293   return scm_make_memoized (scm_cons (car, cdr), env);
 294 }
 295 #undef FUNC_NAME
 296
 297 SCM_DEFINE (scm_mem_to_proc, "mem->proc", 1, 0, 0,
 298             (SCM obj),
 299             "Convert a memoized object (which must be a lambda expression)\n"
 300             "to a procedure.")
 301 #define FUNC_NAME s_scm_mem_to_proc
 302 {
 303   SCM env;
 304   SCM_VALIDATE_MEMOIZED (1, obj);
 305   env = SCM_MEMOIZED_ENV (obj);
 306   obj = SCM_MEMOIZED_EXP (obj);
 307   if (!SCM_CONSP (obj) || !SCM_EQ_P (SCM_CAR (obj), SCM_IM_LAMBDA))
 308     SCM_MISC_ERROR ("expected lambda expression", scm_list_1 (obj));
 309   return scm_closure (SCM_CDR (obj), env);
 310 }
 311 #undef FUNC_NAME
 312
 313 SCM_DEFINE (scm_proc_to_mem, "proc->mem", 1, 0, 0,
 314             (SCM obj),
 315             "Convert a procedure to a memoized object.")
 316 #define FUNC_NAME s_scm_proc_to_mem
 317 {
 318   SCM_VALIDATE_CLOSURE (1, obj);
 319   return scm_make_memoized (scm_cons (SCM_IM_LAMBDA, SCM_CODE (obj)),
 320                             SCM_ENV (obj));
 321 }
 322 #undef FUNC_NAME
 323
 324 #endif /* GUILE_DEBUG */
 325
 326 SCM_DEFINE (scm_unmemoize, "unmemoize", 1, 0, 0,
 327             (SCM m),
 328             "Unmemoize the memoized expression @var{m},")
 329 #define FUNC_NAME s_scm_unmemoize
 330 {
 331   SCM_VALIDATE_MEMOIZED (1, m);
 332   return scm_unmemocopy (SCM_MEMOIZED_EXP (m), SCM_MEMOIZED_ENV (m));
 333 }
 334 #undef FUNC_NAME
 335
 336 SCM_DEFINE (scm_memoized_environment, "memoized-environment", 1, 0, 0,
 337             (SCM m),
 338             "Return the environment of the memoized expression @var{m}.")
 339 #define FUNC_NAME s_scm_memoized_environment
 340 {
 341   SCM_VALIDATE_MEMOIZED (1, m);
 342   return SCM_MEMOIZED_ENV (m);
 343 }
 344 #undef FUNC_NAME
 345
 346 SCM_DEFINE (scm_procedure_name, "procedure-name", 1, 0, 0,
 347             (SCM proc),
 348             "Return the name of the procedure @var{proc}")
 349 #define FUNC_NAME s_scm_procedure_name
 350 {
 351   SCM_VALIDATE_PROC (1, proc);
 352   switch (SCM_TYP7 (proc)) {
 353   case scm_tcs_subrs:
 354     return SCM_SNAME (proc);
 355   default:
 356     {
 357       SCM name = scm_procedure_property (proc, scm_sym_name);
 358 #if 0
 359       /* Source property scm_sym_procname not implemented yet... */
 360       SCM name = scm_source_property (SCM_CAR (SCM_CLOSURE_BODY (proc)), scm_sym_procname);
 361       if (SCM_FALSEP (name))
 362         name = scm_procedure_property (proc, scm_sym_name);
 363 #endif
 364       if (SCM_FALSEP (name) && SCM_CLOSUREP (proc))
 365         name = scm_reverse_lookup (SCM_ENV (proc), proc);
 366       return name;
 367     }
 368   }
 369 }
 370 #undef FUNC_NAME
 371
 372 SCM_DEFINE (scm_procedure_source, "procedure-source", 1, 0, 0,
 373             (SCM proc),
 374             "Return the source of the procedure @var{proc}.")
 375 #define FUNC_NAME s_scm_procedure_source
 376 {
 377   SCM_VALIDATE_NIM (1, proc);
 378  again:
 379   switch (SCM_TYP7 (proc)) {
 380   case scm_tcs_closures:
 381     {
 382       SCM formals = SCM_CLOSURE_FORMALS (proc);
 383       SCM src = scm_source_property (SCM_CLOSURE_BODY (proc), scm_sym_copy);
 384       if (!SCM_FALSEP (src))
 385         return scm_cons2 (scm_sym_lambda, formals, src);
 386       return scm_cons (scm_sym_lambda,
 387                        scm_unmemocopy (SCM_CODE (proc),
 388                                        SCM_EXTEND_ENV (formals,
 389                                                        SCM_EOL,
 390                                                        SCM_ENV (proc))));
 391     }
 392   case scm_tcs_struct:
 393     if (!SCM_I_OPERATORP (proc))
 394       break;
 395     goto procprop;
 396   case scm_tc7_smob:
 397     if (!SCM_SMOB_DESCRIPTOR (proc).apply)
 398       break;
 399   case scm_tcs_subrs:
 400 #ifdef CCLO
 401   case scm_tc7_cclo:
 402 #endif
 403   procprop:
 404     /* It would indeed be a nice thing if we supplied source even for
 405        built in procedures! */
 406     return scm_procedure_property (proc, scm_sym_source);
 407   case scm_tc7_pws:
 408     {
 409       SCM src = scm_procedure_property (proc, scm_sym_source);
 410       if (!SCM_FALSEP (src))
 411         return src;
 412       proc = SCM_PROCEDURE (proc);
 413       goto again;
 414     }
 415   default:
 416     ;
 417   }
 418   SCM_WRONG_TYPE_ARG (1, proc);
 419   return SCM_BOOL_F; /* not reached */
 420 }
 421 #undef FUNC_NAME
 422
 423 SCM_DEFINE (scm_procedure_environment, "procedure-environment", 1, 0, 0,
 424             (SCM proc),
 425             "Return the environment of the procedure @var{proc}.")
 426 #define FUNC_NAME s_scm_procedure_environment
 427 {
 428   SCM_VALIDATE_NIM (1, proc);
 429   switch (SCM_TYP7 (proc)) {
 430   case scm_tcs_closures:
 431     return SCM_ENV (proc);
 432   case scm_tcs_subrs:
 433 #ifdef CCLO
 434   case scm_tc7_cclo:
 435 #endif
 436     return SCM_EOL;
 437   default:
 438     SCM_WRONG_TYPE_ARG (1, proc);
 439     /* not reached */
 440   }
 441 }
 442 #undef FUNC_NAME
 443
 444 \f
 445
 446 /* Eval in a local environment.  We would like to have the ability to
 447  * evaluate in a specified local environment, but due to the
 448  * memoization this isn't normally possible.  We solve it by copying
 449  * the code before evaluating.  One solution would be to have eval.c
 450  * generate yet another evaluator.  They are not very big actually.
 451  */
 452 SCM_DEFINE (scm_local_eval, "local-eval", 1, 1, 0,
 453             (SCM exp, SCM env),
 454             "Evaluate @var{exp} in its environment.  If @var{env} is supplied,\n"
 455             "it is the environment in which to evaluate @var{exp}.  Otherwise,\n"
 456             "@var{exp} must be a memoized code object (in which case, its environment\n"
 457             "is implicit).")
 458 #define FUNC_NAME s_scm_local_eval
 459 {
 460   if (SCM_UNBNDP (env))
 461   {
 462     SCM_VALIDATE_MEMOIZED (1, exp);
 463     return scm_i_eval_x (SCM_MEMOIZED_EXP (exp), SCM_MEMOIZED_ENV (exp));
 464   }
 465   return scm_i_eval (exp, env);
 466 }
 467 #undef FUNC_NAME
 468
 469 #if 0
 470 SCM_REGISTER_PROC (s_reverse_lookup, "reverse-lookup", 2, 0, 0, scm_reverse_lookup);
 471 #endif
 472
 473 SCM
 474 scm_reverse_lookup (SCM env, SCM data)
 475 {
 476   while (SCM_CONSP (env) && SCM_CONSP (SCM_CAR (env)))
 477     {
 478       SCM names = SCM_CAAR (env);
 479       SCM values = SCM_CDAR (env);
 480       while (SCM_CONSP (names))
 481         {
 482           if (SCM_EQ_P (SCM_CAR (values), data))
 483             return SCM_CAR (names);
 484           names = SCM_CDR (names);
 485           values = SCM_CDR (values);
 486         }
 487       if (!SCM_NULLP (names) && SCM_EQ_P (values, data))
 488         return names;
 489       env = SCM_CDR (env);
 490     }
 491   return SCM_BOOL_F;
 492 }
 493
 494 SCM
 495 scm_start_stack (SCM id, SCM exp, SCM env)
 496 {
 497   SCM answer;
 498   scm_t_debug_frame vframe;
 499   scm_t_debug_info vframe_vect_body;
 500   vframe.prev = scm_last_debug_frame;
 501   vframe.status = SCM_VOIDFRAME;
 502   vframe.vect = &vframe_vect_body;
 503   vframe.vect[0].id = id;
 504   scm_last_debug_frame = &vframe;
 505   answer = scm_i_eval (exp, env);
 506   scm_last_debug_frame = vframe.prev;
 507   return answer;
 508 }
 509
 510 SCM_SYNTAX(s_start_stack, "start-stack", scm_makacro, scm_m_start_stack);
 511
 512 static SCM
 513 scm_m_start_stack (SCM exp, SCM env)
 514 #define FUNC_NAME s_start_stack
 515 {
 516   exp = SCM_CDR (exp);
 517   if (!SCM_CONSP (exp)
 518       || !SCM_CONSP (SCM_CDR (exp))
 519       || !SCM_NULLP (SCM_CDDR (exp)))
 520     SCM_WRONG_NUM_ARGS ();
 521   return scm_start_stack (scm_eval_car (exp, env), SCM_CADR (exp), env);
 522 }
 523 #undef FUNC_NAME
 524
 525
 526 /* {Debug Objects}
 527  *
 528  * The debugging evaluator throws these on frame traps.
 529  */
 530
 531 scm_t_bits scm_tc16_debugobj;
 532
 533 static int
 534 debugobj_print (SCM obj, SCM port, scm_print_state *pstate SCM_UNUSED)
 535 {
 536   scm_puts ("#<debug-object ", port);
 537   scm_intprint ((long) SCM_DEBUGOBJ_FRAME (obj), 16, port);
 538   scm_putc ('>', port);
 539   return 1;
 540 }
 541
 542 SCM_DEFINE (scm_debug_object_p, "debug-object?", 1, 0, 0,
 543             (SCM obj),
 544             "Return @code{#t} if @var{obj} is a debug object.")
 545 #define FUNC_NAME s_scm_debug_object_p
 546 {
 547   return SCM_BOOL(SCM_DEBUGOBJP (obj));
 548 }
 549 #undef FUNC_NAME
 550
 551
 552 SCM
 553 scm_make_debugobj (scm_t_debug_frame *frame)
 554 {
 555   return scm_cell (scm_tc16_debugobj, (scm_t_bits) frame);
 556 }
 557
 558 \f
 559
 560 /* Undocumented debugging procedure */
 561 #ifdef GUILE_DEBUG
 562 SCM_DEFINE (scm_debug_hang, "debug-hang", 0, 1, 0,
 563             (SCM obj),
 564             "Go into an endless loop, which can be only terminated with\n"
 565             "a debugger.")
 566 #define FUNC_NAME s_scm_debug_hang
 567 {
 568   int go = 0;
 569   while (!go) ;
 570   return SCM_UNSPECIFIED;
 571 }
 572 #undef FUNC_NAME
 573 #endif
 574
 575 \f
 576
 577 void
 578 scm_init_debug ()
 579 {
 580   scm_init_opts (scm_debug_options, scm_debug_opts, SCM_N_DEBUG_OPTIONS);
 581
 582   scm_tc16_memoized = scm_make_smob_type ("memoized", 0);
 583   scm_set_smob_mark (scm_tc16_memoized, scm_markcdr);
 584   scm_set_smob_print (scm_tc16_memoized, memoized_print);
 585
 586   scm_tc16_debugobj = scm_make_smob_type ("debug-object", 0);
 587   scm_set_smob_print (scm_tc16_debugobj, debugobj_print);
 588
 589 #ifdef GUILE_DEBUG
 590   scm_c_define ("SCM_IM_AND", SCM_IM_AND);
 591   scm_c_define ("SCM_IM_BEGIN", SCM_IM_BEGIN);
 592   scm_c_define ("SCM_IM_CASE", SCM_IM_CASE);
 593   scm_c_define ("SCM_IM_COND", SCM_IM_COND);
 594   scm_c_define ("SCM_IM_DO", SCM_IM_DO);
 595   scm_c_define ("SCM_IM_IF", SCM_IM_IF);
 596   scm_c_define ("SCM_IM_LAMBDA", SCM_IM_LAMBDA);
 597   scm_c_define ("SCM_IM_LET", SCM_IM_LET);
 598   scm_c_define ("SCM_IM_LETSTAR", SCM_IM_LETSTAR);
 599   scm_c_define ("SCM_IM_LETREC", SCM_IM_LETREC);
 600   scm_c_define ("SCM_IM_OR", SCM_IM_OR);
 601   scm_c_define ("SCM_IM_QUOTE", SCM_IM_QUOTE);
 602   scm_c_define ("SCM_IM_SET_X", SCM_IM_SET_X);
 603   scm_c_define ("SCM_IM_DEFINE", SCM_IM_DEFINE);
 604   scm_c_define ("SCM_IM_APPLY", SCM_IM_APPLY);
 605   scm_c_define ("SCM_IM_CONT", SCM_IM_CONT);
 606   scm_c_define ("SCM_IM_DISPATCH", SCM_IM_DISPATCH);
 607 #endif
 608   scm_add_feature ("debug-extensions");
 609
 610 #include "libguile/debug.x"
 611 }
 612
 613 /*
 614   Local Variables:
 615   c-file-style: "gnu"
 616   End:
 617 */