libguile/debug.h

   1 /* classes: h_files */
   2
   3 #ifndef DEBUGH
   4 #define DEBUGH
   5 /*      Copyright (C) 1995,1996 Mikael Djurfeldt
   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, 675 Mass Ave, Cambridge, MA 02139, USA.
  20  *
  21  * As a special exception, the Free Software Foundation gives permission
  22  * for additional uses of the text contained in its release of GUILE.
  23  *
  24  * The exception is that, if you link the GUILE library with other files
  25  * to produce an executable, this does not by itself cause the
  26  * resulting executable to be covered by the GNU General Public License.
  27  * Your use of that executable is in no way restricted on account of
  28  * linking the GUILE library code into it.
  29  *
  30  * This exception does not however invalidate any other reasons why
  31  * the executable file might be covered by the GNU General Public License.
  32  *
  33  * This exception applies only to the code released by the
  34  * Free Software Foundation under the name GUILE.  If you copy
  35  * code from other Free Software Foundation releases into a copy of
  36  * GUILE, as the General Public License permits, the exception does
  37  * not apply to the code that you add in this way.  To avoid misleading
  38  * anyone as to the status of such modified files, you must delete
  39  * this exception notice from them.
  40  *
  41  * If you write modifications of your own for GUILE, it is your choice
  42  * whether to permit this exception to apply to your modifications.
  43  * If you do not wish that, delete this exception notice.
  44  *
  45  * The author can be reached at djurfeldt@nada.kth.se
  46  * Mikael Djurfeldt, SANS/NADA KTH, 10044 STOCKHOLM, SWEDEN
  47  */
  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 and scm_evaluator_trap_table are 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_option scm_evaluator_trap_table[];
  86
  87 #define SCM_ENTER_FRAME_P      scm_evaluator_trap_table[0].val
  88 #define SCM_APPLY_FRAME_P      scm_evaluator_trap_table[1].val
  89 #define SCM_EXIT_FRAME_P       scm_evaluator_trap_table[2].val
  90 #define SCM_N_EVALUATOR_TRAPS 3
  91
  92 extern SCM (*scm_ceval_ptr) SCM_P ((SCM exp, SCM env));
  93
  94 extern int scm_debug_mode;
  95 extern int scm_check_entry_p, scm_check_apply_p, scm_check_exit_p;
  96
  97 #define CHECK_ENTRY      scm_check_entry_p
  98 #define CHECK_APPLY      scm_check_apply_p
  99 #define CHECK_EXIT       scm_check_exit_p
 100
 101 #define SCM_RESET_DEBUG_MODE \
 102 {\
 103   if (SCM_ENTER_FRAME_P || SCM_BREAKPOINTS_P) CHECK_ENTRY = 1;\
 104   if (SCM_APPLY_FRAME_P || SCM_TRACE_P) CHECK_APPLY = 1;\
 105   if (SCM_EXIT_FRAME_P || SCM_TRACE_P) CHECK_EXIT = 1;\
 106   scm_debug_mode = SCM_DEVAL_P || SCM_BACKTRACE_P || CHECK_ENTRY || CHECK_APPLY || CHECK_EXIT;\
 107   scm_ceval_ptr = scm_debug_mode ? scm_deval : scm_ceval;\
 108 }
 109
 110
 111 /* {Evaluator}
 112  */
 113
 114 typedef union scm_debug_info
 115 {
 116   struct { SCM exp, env; } e;
 117   struct { SCM proc, args; } a;
 118 } scm_debug_info;
 119
 120 extern int scm_debug_eframe_size;
 121
 122 typedef struct scm_debug_frame
 123 {
 124   struct scm_debug_frame *prev;
 125   long status;
 126   scm_debug_info vect[1];
 127 } scm_debug_frame;
 128
 129 #ifndef USE_THREADS
 130 extern scm_debug_frame *scm_last_debug_frame;
 131 #endif
 132
 133 #define SCM_EVALFRAME    (0L << 10)
 134 #define SCM_APPLYFRAME   (1L << 10)
 135 #define SCM_TAILREC      (1L << 9)
 136 #define SCM_TRACED_FRAME (1L << 8)
 137 #define SCM_ARGS_READY   (1L << 7)
 138 #define SCM_DOVERFLOW    (1L << 6)
 139 #define SCM_MAX_FRAME_SIZE 63 /* also used as a mask for the size field */
 140
 141 #define SCM_FRAMETYPE    (1L << 10)
 142
 143 #define SCM_EVALFRAMEP(x) (((x).status & SCM_FRAMETYPE) == SCM_EVALFRAME)
 144 #define SCM_APPLYFRAMEP(x) (((x).status & SCM_FRAMETYPE) == SCM_APPLYFRAME)
 145 #define SCM_STARTFRAMEP(x) (((x).status & SCM_FRAMETYPE) == SCM_STARTFRAME)
 146 #define SCM_OVERFLOWP(x) (((x).status & SCM_DOVERFLOW) != 0)
 147 #define SCM_ARGS_READY_P(x) (((x).status & SCM_ARGS_READY) != 0)
 148 #define SCM_TRACED_FRAME_P(x) (((x).status & SCM_TRACED_FRAME) != 0)
 149 #define SCM_TAILRECP(x) (((x).status & SCM_TAILREC) != 0)
 150 #define SCM_SET_OVERFLOW(x) ((x).status |= SCM_DOVERFLOW)
 151 #define SCM_SET_ARGSREADY(x) ((x).status |= SCM_ARGS_READY)
 152 #define SCM_CLEAR_ARGSREADY(x) ((x).status &= ~SCM_ARGS_READY)
 153 #define SCM_SET_TRACED_FRAME(x) ((x).status |= SCM_TRACED_FRAME)
 154 #define SCM_CLEAR_TRACED_FRAME(x) ((x).status &= ~SCM_TRACED_FRAME)
 155 #define SCM_SET_TAILREC(x) ((x).status |= SCM_TAILREC)
 156
 157 #define SCM_DEBUGGINGP scm_debug_mode
 158 #define SCM_DSIDEVAL(x, env) if NIMP(x) scm_deval((x), (env))
 159
 160 /* {Debug Objects}
 161  */
 162
 163 extern long scm_tc16_debugobj;
 164
 165 #define SCM_DEBUGOBJP(x) (scm_tc16_debugobj == SCM_TYP16 (x))
 166 #define SCM_DEBUGOBJ_FRAME(x) SCM_CDR (x)
 167
 168 /* {Memoized Source}
 169  */
 170
 171 extern long scm_tc16_memoized;
 172
 173 #define SCM_MEMOIZEDP(x) (scm_tc16_memoized == SCM_TYP16 (x))
 174 #define SCM_MEMOIZED_EXP(x) SCM_CAR (SCM_CDR (x))
 175 #define SCM_MEMOIZED_ENV(x) SCM_CDR (SCM_CDR (x))
 176
 177 \f
 178
 179 extern SCM * scm_lookup_cstr SCM_P ((char *str, int len, SCM env));
 180 extern SCM * scm_lookup_soft SCM_P ((SCM var, SCM genv));
 181 extern SCM scm_evstr SCM_P ((char *str));
 182 extern SCM scm_eval_string SCM_P ((SCM str));
 183 extern int scm_ready_p SCM_P ((void));
 184 extern void debug_print SCM_P ((SCM obj));
 185 extern SCM scm_debug_object_p SCM_P ((SCM obj));
 186 extern SCM scm_local_eval SCM_P ((SCM exp, SCM env));
 187 extern SCM scm_procedure_environment SCM_P ((SCM proc));
 188 extern SCM scm_procedure_source SCM_P ((SCM proc));
 189 extern SCM scm_procedure_name SCM_P ((SCM proc));
 190 extern SCM scm_memoized_environment SCM_P ((SCM m));
 191 extern SCM scm_make_memoized SCM_P ((SCM exp, SCM env));
 192 extern SCM scm_memoized_p SCM_P ((SCM obj));
 193 extern SCM scm_single_step SCM_P ((SCM cont, SCM val));
 194 extern SCM scm_evaluator_traps SCM_P ((SCM setting));
 195 extern SCM scm_debug_options SCM_P ((SCM setting));
 196 extern SCM scm_unmemoize SCM_P ((SCM memoized));
 197 extern SCM scm_make_debugobj SCM_P ((scm_debug_frame* debug));
 198 extern void scm_init_debug SCM_P ((void));
 199
 200 #endif /* DEBUGH */