libguile/debug.c

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