libguile/debug.h

   1 /* classes: h_files */
   2
   3 #ifndef DEBUGH
   4 #define DEBUGH
   5 /*      Copyright (C) 1995,1996 Free Software Foundation
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2, or (at your option)
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this software; see the file COPYING.  If not, write to
  19  * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  20  * Boston, MA 02111-1307 USA
  21  *
  22  * As a special exception, the Free Software Foundation gives permission
  23  * for additional uses of the text contained in its release of GUILE.
  24  *
  25  * The exception is that, if you link the GUILE library with other files
  26  * to produce an executable, this does not by itself cause the
  27  * resulting executable to be covered by the GNU General Public License.
  28  * Your use of that executable is in no way restricted on account of
  29  * linking the GUILE library code into it.
  30  *
  31  * This exception does not however invalidate any other reasons why
  32  * the executable file might be covered by the GNU General Public License.
  33  *
  34  * This exception applies only to the code released by the
  35  * Free Software Foundation under the name GUILE.  If you copy
  36  * code from other Free Software Foundation releases into a copy of
  37  * GUILE, as the General Public License permits, the exception does
  38  * not apply to the code that you add in this way.  To avoid misleading
  39  * anyone as to the status of such modified files, you must delete
  40  * this exception notice from them.
  41  *
  42  * If you write modifications of your own for GUILE, it is your choice
  43  * whether to permit this exception to apply to your modifications.
  44  * If you do not wish that, delete this exception notice.
  45  *
  46  * The author can be reached at djurfeldt@nada.kth.se
  47  * Mikael Djurfeldt, SANS/NADA KTH, 10044 STOCKHOLM, SWEDEN */
  48 \f
  49
  50 #include "libguile/__scm.h"
  51
  52 #include "libguile/options.h"
  53 \f
  54
  55 /*
  56  * Here comes some definitions for the debugging machinery.
  57  * It might seem strange to represent debug flags as ints,
  58  * but consider that any particular piece of code is normally
  59  * only interested in one flag at a time.  This is then
  60  * the most efficient representation.
  61  */
  62
  63 /* {Options}
  64  */
  65
  66 /* scm_debug_opts is  defined in eval.c.
  67  */
  68
  69 extern scm_option scm_debug_opts[];
  70
  71 #define SCM_CHEAPTRAPS_P        scm_debug_opts[0].val
  72 #define SCM_BREAKPOINTS_P       scm_debug_opts[1].val
  73 #define SCM_TRACE_P             scm_debug_opts[2].val
  74 #define SCM_REC_PROCNAMES_P     scm_debug_opts[3].val
  75 #define SCM_BACKWARDS_P         scm_debug_opts[4].val
  76 #define SCM_BACKTRACE_INDENT    scm_debug_opts[5].val
  77 #define SCM_N_FRAMES            scm_debug_opts[6].val
  78 #define SCM_BACKTRACE_MAXDEPTH  scm_debug_opts[7].val
  79 #define SCM_BACKTRACE_DEPTH     scm_debug_opts[8].val
  80 #define SCM_BACKTRACE_P         scm_debug_opts[9].val
  81 #define SCM_DEVAL_P             scm_debug_opts[10].val
  82 #define SCM_STACK_LIMIT         scm_debug_opts[11].val
  83 #define SCM_N_DEBUG_OPTIONS 12
  84
  85 extern SCM (*scm_ceval_ptr) SCM_P ((SCM exp, SCM env));
  86
  87 extern int scm_debug_mode;
  88 extern int scm_check_entry_p, scm_check_apply_p, scm_check_exit_p;
  89
  90 #define CHECK_ENTRY      scm_check_entry_p
  91 #define CHECK_APPLY      scm_check_apply_p
  92 #define CHECK_EXIT       scm_check_exit_p
  93
  94 #define SCM_RESET_DEBUG_MODE \
  95 {\
  96   CHECK_ENTRY = SCM_ENTER_FRAME_P || SCM_BREAKPOINTS_P;\
  97   CHECK_APPLY = SCM_APPLY_FRAME_P || SCM_TRACE_P;\
  98   CHECK_EXIT = SCM_EXIT_FRAME_P || SCM_TRACE_P;\
  99   scm_debug_mode = SCM_DEVAL_P || CHECK_ENTRY || CHECK_APPLY || CHECK_EXIT;\
 100   scm_ceval_ptr = scm_debug_mode ? scm_deval : scm_ceval;\
 101 }
 102
 103
 104 /* {Evaluator}
 105  */
 106
 107 typedef union scm_debug_info
 108 {
 109   struct { SCM exp, env; } e;
 110   struct { SCM proc, args; } a;
 111   SCM id;
 112 } scm_debug_info;
 113
 114 extern int scm_debug_eframe_size;
 115
 116 typedef struct scm_debug_frame
 117 {
 118   struct scm_debug_frame *prev;
 119   long status;
 120   scm_debug_info *vect;
 121   scm_debug_info *info;
 122 } scm_debug_frame;
 123
 124 #ifndef USE_THREADS
 125 extern scm_debug_frame *scm_last_debug_frame;
 126 #endif
 127
 128 #define SCM_EVALFRAME    (0L << 10)
 129 #define SCM_APPLYFRAME   (1L << 10)
 130 #define SCM_VOIDFRAME    (2L << 10)
 131 #define SCM_TAILREC      (1L << 9)
 132 #define SCM_TRACED_FRAME (1L << 8)
 133 #define SCM_ARGS_READY   (1L << 7)
 134 #define SCM_DOVERFLOW    (1L << 6)
 135 #define SCM_MAX_FRAME_SIZE 63 /* also used as a mask for the size field */
 136
 137 #define SCM_FRAMETYPE    (3L << 10)
 138
 139 #define SCM_EVALFRAMEP(x) (((x).status & SCM_FRAMETYPE) == SCM_EVALFRAME)
 140 #define SCM_APPLYFRAMEP(x) (((x).status & SCM_FRAMETYPE) == SCM_APPLYFRAME)
 141 #define SCM_VOIDFRAMEP(x) (((x).status & SCM_FRAMETYPE) == SCM_VOIDFRAME)
 142 #define SCM_OVERFLOWP(x) (((x).status & SCM_DOVERFLOW) != 0)
 143 #define SCM_ARGS_READY_P(x) (((x).status & SCM_ARGS_READY) != 0)
 144 #define SCM_TRACED_FRAME_P(x) (((x).status & SCM_TRACED_FRAME) != 0)
 145 #define SCM_TAILRECP(x) (((x).status & SCM_TAILREC) != 0)
 146 #define SCM_SET_OVERFLOW(x) ((x).status |= SCM_DOVERFLOW)
 147 #define SCM_SET_ARGSREADY(x) ((x).status |= SCM_ARGS_READY)
 148 #define SCM_CLEAR_ARGSREADY(x) ((x).status &= ~SCM_ARGS_READY)
 149 #define SCM_SET_TRACED_FRAME(x) ((x).status |= SCM_TRACED_FRAME)
 150 #define SCM_CLEAR_TRACED_FRAME(x) ((x).status &= ~SCM_TRACED_FRAME)
 151 #define SCM_SET_TAILREC(x) ((x).status |= SCM_TAILREC)
 152
 153 #define SCM_DEBUGGINGP scm_debug_mode
 154 #define SCM_DSIDEVAL(x, env) if NIMP(x) scm_deval((x), (env))
 155
 156 /* {Debug Objects}
 157  */
 158
 159 extern long scm_tc16_debugobj;
 160
 161 #define SCM_DEBUGOBJP(x) (scm_tc16_debugobj == SCM_TYP16 (x))
 162 #define SCM_DEBUGOBJ_FRAME(x) SCM_CDR (x)
 163 #define SCM_SET_DEBUGOBJ_FRAME(x, f) SCM_SETCDR (x, f)
 164
 165 /* {Memoized Source}
 166  */
 167
 168 extern long scm_tc16_memoized;
 169
 170 #define SCM_MEMOIZEDP(x) (scm_tc16_memoized == SCM_TYP16 (x))
 171 #define SCM_MEMOIZED_EXP(x) SCM_CAR (SCM_CDR (x))
 172 #define SCM_MEMOIZED_ENV(x) SCM_CDR (SCM_CDR (x))
 173
 174 \f
 175
 176 extern SCM * scm_lookup_cstr SCM_P ((char *str, int len, SCM env));
 177 extern SCM * scm_lookup_soft SCM_P ((SCM var, SCM genv));
 178 extern SCM scm_evstr SCM_P ((char *str));
 179 extern SCM scm_eval_string SCM_P ((SCM str));
 180 extern int scm_ready_p SCM_P ((void));
 181 extern void debug_print SCM_P ((SCM obj));
 182 extern SCM scm_debug_object_p SCM_P ((SCM obj));
 183 extern SCM scm_local_eval SCM_P ((SCM exp, SCM env));
 184 extern SCM scm_start_stack SCM_P ((SCM id, SCM exp, SCM env));
 185 extern SCM scm_procedure_environment SCM_P ((SCM proc));
 186 extern SCM scm_procedure_source SCM_P ((SCM proc));
 187 extern SCM scm_procedure_name SCM_P ((SCM proc));
 188 extern SCM scm_memoized_environment SCM_P ((SCM m));
 189 extern SCM scm_make_memoized SCM_P ((SCM exp, SCM env));
 190 extern SCM scm_memoized_p SCM_P ((SCM obj));
 191 extern SCM scm_with_traps SCM_P ((SCM thunk));
 192 extern SCM scm_evaluator_traps SCM_P ((SCM setting));
 193 extern SCM scm_debug_options SCM_P ((SCM setting));
 194 extern SCM scm_unmemoize SCM_P ((SCM memoized));
 195 extern SCM scm_make_debugobj SCM_P ((scm_debug_frame* debug));
 196 extern void scm_init_debug SCM_P ((void));
 197
 198 #endif /* DEBUGH */