-/* Debugging extensions for Guile
- * Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this software; see the file COPYING. If not, write to
- * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
- * Boston, MA 02111-1307 USA
- *
- * As a special exception, the Free Software Foundation gives permission
- * for additional uses of the text contained in its release of GUILE.
- *
- * The exception is that, if you link the GUILE library with other files
- * to produce an executable, this does not by itself cause the
- * resulting executable to be covered by the GNU General Public License.
- * Your use of that executable is in no way restricted on account of
- * linking the GUILE library code into it.
- *
- * This exception does not however invalidate any other reasons why
- * the executable file might be covered by the GNU General Public License.
- *
- * This exception applies only to the code released by the
- * Free Software Foundation under the name GUILE. If you copy
- * code from other Free Software Foundation releases into a copy of
- * GUILE, as the General Public License permits, the exception does
- * not apply to the code that you add in this way. To avoid misleading
- * anyone as to the status of such modified files, you must delete
- * this exception notice from them.
- *
- * If you write modifications of your own for GUILE, it is your choice
- * whether to permit this exception to apply to your modifications.
- * If you do not wish that, delete this exception notice.
- *
- * The author can be reached at djurfeldt@nada.kth.se
- * Mikael Djurfeldt, SANS/NADA KTH, 10044 STOCKHOLM, SWEDEN */
-
-#include <stdio.h>
-#include "_scm.h"
-#include "eval.h"
-#include "stackchk.h"
-#include "throw.h"
-#include "genio.h"
-#include "macros.h"
-#include "smob.h"
-#include "procprop.h"
-#include "srcprop.h"
-#include "alist.h"
-#include "continuations.h"
-#include "strports.h"
-#include "read.h"
-#include "feature.h"
-#include "dynwind.h"
-#include "modules.h"
-
-#include "debug.h"
-\f
-
-/* {Run time control of the debugging evaluator}
- */
-
-SCM_PROC (s_debug_options, "debug-options-interface", 0, 1, 0, scm_debug_options);
-
-SCM
-scm_debug_options (setting)
- SCM setting;
-{
- SCM ans;
- SCM_DEFER_INTS;
- ans = scm_options (setting,
- scm_debug_opts,
- SCM_N_DEBUG_OPTIONS,
- s_debug_options);
-#ifndef SCM_RECKLESS
- if (!(1 <= SCM_N_FRAMES && SCM_N_FRAMES <= SCM_MAX_FRAME_SIZE))
- {
- scm_options (ans, scm_debug_opts, SCM_N_DEBUG_OPTIONS, s_debug_options);
- scm_out_of_range (s_debug_options, setting);
- }
-#endif
- SCM_RESET_DEBUG_MODE;
- scm_stack_checking_enabled_p = SCM_STACK_CHECKING_P;
- scm_debug_eframe_size = 2 * SCM_N_FRAMES;
- SCM_ALLOW_INTS
- return ans;
-}
-
-SCM_PROC (s_with_traps, "with-traps", 1, 0, 0, scm_with_traps);
-
-static void
-with_traps_before (void *data)
-{
- int *trap_flag = data;
- *trap_flag = SCM_TRAPS_P;
- SCM_TRAPS_P = 1;
-}
-
-static void
-with_traps_after (void *data)
-{
- int *trap_flag = data;
- SCM_TRAPS_P = *trap_flag;
-}
-
-static SCM
-with_traps_inner (void *data)
-{
- SCM thunk = (SCM) data;
- return scm_apply (thunk, SCM_EOL, SCM_EOL);
-}
-
-SCM
-scm_with_traps (SCM thunk)
-{
- int trap_flag;
- SCM_ASSERT (SCM_NFALSEP (scm_thunk_p (thunk)),
- thunk,
- SCM_ARG1,
- s_with_traps);
- return scm_internal_dynamic_wind (with_traps_before,
- with_traps_inner,
- with_traps_after,
- (void *) thunk,
- &trap_flag);
-}
-
-\f
-static SCM scm_i_source, scm_i_more;
-static SCM scm_i_proc, scm_i_args, scm_i_eval_args;
-static SCM scm_i_procname;
-
-/* {Memoized Source}
- */
-
-long scm_tc16_memoized;
-
-
-static int prinmemoized SCM_P ((SCM obj, SCM port, scm_print_state *pstate));
-
-static int
-prinmemoized (obj, port, pstate)
- SCM obj;
- SCM port;
- scm_print_state *pstate;
-{
- int writingp = SCM_WRITINGP (pstate);
- scm_puts ("#<memoized ", port);
- SCM_SET_WRITINGP (pstate, 1);
-#ifdef GUILE_DEBUG
- scm_iprin1 (SCM_MEMOIZED_EXP (obj), port, pstate);
-#else
- scm_iprin1 (scm_unmemoize (obj), port, pstate);
-#endif
- SCM_SET_WRITINGP (pstate, writingp);
- scm_putc ('>', port);
- return 1;
-}
-
-SCM_PROC (s_memoized_p, "memoized?", 1, 0, 0, scm_memoized_p);
-
-SCM
-scm_memoized_p (obj)
- SCM obj;
-{
- return SCM_NIMP (obj) && SCM_MEMOIZEDP (obj) ? SCM_BOOL_T : SCM_BOOL_F;
-}
-
-SCM
-scm_make_memoized (exp, env)
- SCM exp;
- SCM env;
-{
- /* *fixme* Check that env is a valid environment. */
- register SCM z, ans;
- SCM_ENTER_A_SECTION;
- SCM_NEWSMOB (z, exp, env);
- SCM_NEWSMOB (ans, scm_tc16_memoized, z);
- SCM_EXIT_A_SECTION;
- return ans;
-}
-
-#ifdef GUILE_DEBUG
-/*
- * Some primitives for construction of memoized code
- *
- * - procedure: memcons CAR CDR [ENV]
- *
- * Construct a pair, encapsulated in a memoized object.
- *
- * The CAR and CDR can be either normal or memoized. If ENV isn't
- * specified, the top-level environment of the current module will
- * be assumed. All environments must match.
- *
- * - procedure: make-gloc VARIABLE [ENV]
- *
- * Return a gloc, encapsulated in a memoized object.
- *
- * (Glocs can't exist in normal list structures, since they will
- * be mistaken for structs.)
- *
- * - procedure: gloc? OBJECT
- *
- * Return #t if OBJECT is a memoized gloc.
- *
- * - procedure: make-iloc FRAME BINDING CDRP
- *
- * Return an iloc referring to frame no. FRAME, binding
- * no. BINDING. If CDRP is non-#f, the iloc is referring to a
- * frame consisting of a single pair, with the value stored in the
- * CDR.
- *
- * - procedure: iloc? OBJECT
- *
- * Return #t if OBJECT is an iloc.
- *
- * - procedure: mem->proc MEMOIZED
- *
- * Construct a closure from the memoized lambda expression MEMOIZED
- *
- * WARNING! The code is not copied!
- *
- * - procedure: proc->mem CLOSURE
- *
- * Turn the closure CLOSURE into a memoized object.
- *
- * WARNING! The code is not copied!
- *
- * - constant: SCM_IM_AND
- * - constant: SCM_IM_BEGIN
- * - constant: SCM_IM_CASE
- * - constant: SCM_IM_COND
- * - constant: SCM_IM_DO
- * - constant: SCM_IM_IF
- * - constant: SCM_IM_LAMBDA
- * - constant: SCM_IM_LET
- * - constant: SCM_IM_LETSTAR
- * - constant: SCM_IM_LETREC
- * - constant: SCM_IM_OR
- * - constant: SCM_IM_QUOTE
- * - constant: SCM_IM_SET
- * - constant: SCM_IM_DEFINE
- * - constant: SCM_IM_APPLY
- * - constant: SCM_IM_CONT
- * - constant: SCM_IM_DISPATCH
- */
-
-#include "variable.h"
-#include "procs.h"
-
-SCM_PROC (s_make_gloc, "make-gloc", 1, 1, 0, scm_make_gloc);
-
-SCM
-scm_make_gloc (var, env)
- SCM var;
- SCM env;
-{
-#if 1 /* Unsafe */
- if (SCM_NIMP (var) && SCM_CONSP (var))
- var = scm_cons (SCM_BOOL_F, var);
- else
-#endif
- SCM_ASSERT (SCM_NIMP (var) && SCM_VARIABLEP (var),
- var,
- SCM_ARG1,
- s_make_gloc);
- if (SCM_UNBNDP (env))
- env = scm_top_level_env (SCM_CDR (scm_top_level_lookup_closure_var));
- else
- SCM_ASSERT (SCM_NULLP (env) || (SCM_NIMP (env) && SCM_CONSP (env)),
- env,
- SCM_ARG2,
- s_make_gloc);
- return scm_make_memoized (SCM_VARVCELL (var) + 1, env);
-}
-
-SCM_PROC (s_gloc_p, "gloc?", 1, 0, 0, scm_gloc_p);
-
-SCM
-scm_gloc_p (obj)
- SCM obj;
-{
- return ((SCM_NIMP (obj)
- && SCM_MEMOIZEDP (obj)
- && (SCM_MEMOIZED_EXP (obj) & 7) == 1)
- ? SCM_BOOL_T
- : SCM_BOOL_F);
-}
-
-SCM_PROC (s_make_iloc, "make-iloc", 3, 0, 0, scm_make_iloc);
-
-SCM
-scm_make_iloc (frame, binding, cdrp)
- SCM frame;
- SCM binding;
- SCM cdrp;
-{
- SCM_ASSERT (SCM_INUMP (frame), frame, SCM_ARG1, s_make_iloc);
- SCM_ASSERT (SCM_INUMP (binding), binding, SCM_ARG2, s_make_iloc);
- return (SCM_ILOC00
- + SCM_IFRINC * SCM_INUM (frame)
- + (SCM_NFALSEP (cdrp) ? SCM_ICDR : 0)
- + SCM_IDINC * SCM_INUM (binding));
-}
-
-SCM_PROC (s_iloc_p, "iloc?", 1, 0, 0, scm_iloc_p);
-
-SCM
-scm_iloc_p (obj)
- SCM obj;
-{
- return SCM_ILOCP (obj) ? SCM_BOOL_T : SCM_BOOL_F;
-}
-
-SCM_PROC (s_memcons, "memcons", 2, 1, 0, scm_memcons);
-
-SCM
-scm_memcons (car, cdr, env)
- SCM car;
- SCM cdr;
- SCM env;
-{
- if (SCM_NIMP (car) && SCM_MEMOIZEDP (car))
- {
- /*fixme* environments may be two different but equal top-level envs */
- if (!SCM_UNBNDP (env) && SCM_MEMOIZED_ENV (car) != env)
- scm_misc_error (s_memcons,
- "environment mismatch arg1 <-> arg3",
- scm_cons2 (car, env, SCM_EOL));
- else
- env = SCM_MEMOIZED_ENV (car);
- car = SCM_MEMOIZED_EXP (car);
- }
- if (SCM_NIMP (cdr) && SCM_MEMOIZEDP (cdr))
- {
- if (!SCM_UNBNDP (env) && SCM_MEMOIZED_ENV (cdr) != env)
- scm_misc_error (s_memcons,
- "environment mismatch arg2 <-> arg3",
- scm_cons2 (cdr, env, SCM_EOL));
- else
- env = SCM_MEMOIZED_ENV (cdr);
- cdr = SCM_MEMOIZED_EXP (cdr);
- }
- if (SCM_UNBNDP (env))
- env = scm_top_level_env (SCM_CDR (scm_top_level_lookup_closure_var));
- else
- SCM_ASSERT (SCM_NULLP (env) || (SCM_NIMP (env) && SCM_CONSP (env)),
- env,
- SCM_ARG3,
- s_make_iloc);
- return scm_make_memoized (scm_cons (car, cdr), env);
-}
-
-SCM_PROC (s_mem_to_proc, "mem->proc", 1, 0, 0, scm_mem_to_proc);
-
-SCM
-scm_mem_to_proc (obj)
- SCM obj;
-{
- SCM env;
- SCM_ASSERT (SCM_NIMP (obj) && SCM_MEMOIZEDP (obj),
- obj,
- SCM_ARG1,
- s_mem_to_proc);
- env = SCM_MEMOIZED_ENV (obj);
- obj = SCM_MEMOIZED_EXP (obj);
- if (!(SCM_NIMP (obj) && SCM_CAR (obj) == SCM_IM_LAMBDA))
- scm_misc_error (s_mem_to_proc,
- "expected lambda expression",
- scm_cons (obj, SCM_EOL));
- return scm_closure (SCM_CDR (obj), env);
-}
-
-SCM_PROC (s_proc_to_mem, "proc->mem", 1, 0, 0, scm_proc_to_mem);
-
-SCM
-scm_proc_to_mem (obj)
- SCM obj;
-{
- SCM_ASSERT (SCM_NIMP (obj) && SCM_CLOSUREP (obj),
- obj,
- SCM_ARG1,
- s_proc_to_mem);
- return scm_make_memoized (scm_cons (SCM_IM_LAMBDA, SCM_CODE (obj)),
- SCM_ENV (obj));
-}
-
-#endif /* GUILE_DEBUG */
-
-SCM_PROC (s_unmemoize, "unmemoize", 1, 0, 0, scm_unmemoize);
-
-SCM
-scm_unmemoize (m)
- SCM m;
-{
- SCM_ASSERT (SCM_NIMP (m) && SCM_MEMOIZEDP (m), m, SCM_ARG1, s_unmemoize);
- return scm_unmemocopy (SCM_MEMOIZED_EXP (m), SCM_MEMOIZED_ENV (m));
-}
-
-SCM_PROC (s_memoized_environment, "memoized-environment", 1, 0, 0, scm_memoized_environment);
-
-SCM
-scm_memoized_environment (m)
- SCM m;
-{
- SCM_ASSERT (SCM_NIMP (m) && SCM_MEMOIZEDP (m), m, SCM_ARG1, s_unmemoize);
- return SCM_MEMOIZED_ENV (m);
-}
-
-SCM_PROC (s_procedure_name, "procedure-name", 1, 0, 0, scm_procedure_name);
-
-SCM
-scm_procedure_name (proc)
- SCM proc;
-{
- SCM_ASSERT(scm_procedure_p (proc) == SCM_BOOL_T,
- proc,
- SCM_ARG1,
- s_procedure_name);
- switch (SCM_TYP7 (proc)) {
- case scm_tcs_subrs:
- return SCM_SNAME (proc);
- default:
- {
- SCM name = scm_procedure_property (proc, scm_i_name);
-#if 0
- /* Source property scm_i_procname not implemented yet... */
- SCM name = scm_source_property (SCM_CAR (SCM_CDR (SCM_CODE (proc))), scm_i_procname);
- if (SCM_FALSEP (name))
- name = scm_procedure_property (proc, scm_i_name);
-#endif
- if (SCM_FALSEP (name) && SCM_CLOSUREP (proc))
- name = scm_reverse_lookup (SCM_ENV (proc), proc);
- return name;
- }
- }
-}
-
-SCM_PROC (s_procedure_source, "procedure-source", 1, 0, 0, scm_procedure_source);
-
-SCM
-scm_procedure_source (proc)
- SCM proc;
-{
- SCM_ASSERT(SCM_NIMP (proc), proc, SCM_ARG1, s_procedure_source);
- switch (SCM_TYP7 (proc)) {
- case scm_tcs_closures:
- {
- SCM src;
- src = scm_source_property (SCM_CDR (SCM_CODE (proc)), scm_i_copy);
- if (src != SCM_BOOL_F)
- return scm_cons2 (scm_i_lambda, SCM_CAR (SCM_CODE (proc)), src);
- src = SCM_CODE (proc);
- return scm_cons (scm_i_lambda,
- scm_unmemocopy (src,
- SCM_EXTEND_ENV (SCM_CAR (src),
- SCM_EOL,
- SCM_ENV (proc))));
- }
- case scm_tc7_contin:
- case scm_tcs_subrs:
-#ifdef CCLO
- case scm_tc7_cclo:
-#endif
- /* It would indeed be a nice thing if we supplied source even for
- built in procedures! */
- return scm_procedure_property (proc, scm_i_source);
- default:
- scm_wta (proc, (char *) SCM_ARG1, s_procedure_source);
- return 0;
- }
-}
-
-SCM_PROC (s_procedure_environment, "procedure-environment", 1, 0, 0, scm_procedure_environment);
-
-SCM
-scm_procedure_environment (proc)
- SCM proc;
-{
- SCM_ASSERT (SCM_NIMP (proc), proc, SCM_ARG1, s_procedure_environment);
- switch (SCM_TYP7 (proc)) {
- case scm_tcs_closures:
- return SCM_ENV (proc);
- case scm_tc7_contin:
- case scm_tcs_subrs:
-#ifdef CCLO
- case scm_tc7_cclo:
-#endif
- return SCM_EOL;
- default:
- scm_wta (proc, (char *) SCM_ARG1, s_procedure_environment);
- return 0;
- }
-}
-
-\f
-
-/* Eval in a local environment. We would like to have the ability to
- * evaluate in a specified local environment, but due to the
- * memoization this isn't normally possible. We solve it by copying
- * the code before evaluating. One solution would be to have eval.c
- * generate yet another evaluator. They are not very big actually.
- */
-SCM_PROC (s_local_eval, "local-eval", 1, 1, 0, scm_local_eval);
-
-SCM
-scm_local_eval (exp, env)
- SCM exp;
- SCM env;
-{
- if (SCM_UNBNDP (env))
- {
- SCM_ASSERT (SCM_NIMP (exp) && SCM_MEMOIZEDP (exp), exp, SCM_ARG1, s_local_eval);
- return scm_eval_3 (SCM_MEMOIZED_EXP (exp), 0, SCM_MEMOIZED_ENV (exp));
- }
- return scm_eval_3 (exp, 1, env);
-}
-
-#if 0
-SCM_PROC (s_reverse_lookup, "reverse-lookup", 2, 0, 0, scm_reverse_lookup);
-#endif
-
-SCM
-scm_reverse_lookup (SCM env, SCM data)
-{
- SCM names, values;
- while (SCM_NIMP (env) && SCM_CONSP (SCM_CAR (env)))
- {
- names = SCM_CAAR (env);
- values = SCM_CDAR (env);
- while (SCM_NIMP (names) && SCM_CONSP (names))
- {
- if (SCM_CAR (values) == data)
- return SCM_CAR (names);
- names = SCM_CDR (names);
- values = SCM_CDR (values);
- }
- if (names != SCM_EOL && values == data)
- return names;
- env = SCM_CDR (env);
- }
- return SCM_BOOL_F;
-}
-
-SCM
-scm_start_stack (id, exp, env)
- SCM id;
- SCM exp;
- SCM env;
-{
- SCM answer;
- scm_debug_frame vframe;
- scm_debug_info vframe_vect_body;
- vframe.prev = scm_last_debug_frame;
- vframe.status = SCM_VOIDFRAME;
- vframe.vect = &vframe_vect_body;
- vframe.vect[0].id = id;
- scm_last_debug_frame = &vframe;
- answer = scm_eval_3 (exp, 1, env);
- scm_last_debug_frame = vframe.prev;
- return answer;
-}
-
-SCM_SYNTAX(s_start_stack, "start-stack", scm_makacro, scm_m_start_stack);
-
-static SCM
-scm_m_start_stack (exp, env)
- SCM exp;
- SCM env;
-{
- exp = SCM_CDR (exp);
- SCM_ASSERT (SCM_NIMP (exp)
- && SCM_ECONSP (exp)
- && SCM_NIMP (SCM_CDR (exp))
- && SCM_ECONSP (SCM_CDR (exp))
- && SCM_NULLP (SCM_CDDR (exp)),
- exp,
- SCM_WNA,
- s_start_stack);
- return scm_start_stack (scm_eval_car (exp, env), SCM_CADR (exp), env);
-}
-
-/* {Debug Objects}
- *
- * The debugging evaluator throws these on frame traps.
- */
-
-long scm_tc16_debugobj;
-
-static int prindebugobj SCM_P ((SCM obj, SCM port, scm_print_state *pstate));
-
-static int
-prindebugobj (obj, port, pstate)
- SCM obj;
- SCM port;
- scm_print_state *pstate;
-{
- scm_puts ("#<debug-object ", port);
- scm_intprint (SCM_DEBUGOBJ_FRAME (obj), 16, port);
- scm_putc ('>', port);
- return 1;
-}
-
-SCM_PROC (s_debug_object_p, "debug-object?", 1, 0, 0, scm_debug_object_p);
-
-SCM
-scm_debug_object_p (obj)
- SCM obj;
-{
- return SCM_NIMP (obj) && SCM_DEBUGOBJP (obj) ? SCM_BOOL_T : SCM_BOOL_F;
-}
-
-
-SCM
-scm_make_debugobj (frame)
- scm_debug_frame *frame;
-{
- register SCM z;
- SCM_NEWCELL (z);
- SCM_ENTER_A_SECTION;
- SCM_SET_DEBUGOBJ_FRAME (z, (SCM) frame);
- SCM_SETCAR (z, scm_tc16_debugobj);
- SCM_EXIT_A_SECTION;
- return z;
-}
-
-\f
-
-/* Undocumented debugging procedure */
-#ifdef GUILE_DEBUG
-SCM_PROC (s_debug_hang, "debug-hang", 0, 1, 0, scm_debug_hang);
-
-SCM
-scm_debug_hang (obj)
- SCM obj;
-{
- int go = 0;
- while (!go) ;
- return SCM_UNSPECIFIED;
-}
-#endif
-
-\f
-
-void
-scm_init_debug ()
-{
- scm_init_opts (scm_debug_options, scm_debug_opts, SCM_N_DEBUG_OPTIONS);
-
- scm_tc16_memoized = scm_make_smob_type_mfpe ("memoized", 0,
- scm_markcdr, NULL, prinmemoized, NULL);
-
- scm_tc16_debugobj = scm_make_smob_type_mfpe ("debug-object", 0,
- NULL, NULL, prindebugobj, NULL);
-
- scm_i_procname = SCM_CAR (scm_sysintern ("procname", SCM_UNDEFINED));
- scm_i_more = SCM_CAR (scm_sysintern ("...", SCM_UNDEFINED));
- scm_i_source = SCM_CAR (scm_sysintern ("source", SCM_UNDEFINED));
- scm_i_proc = SCM_CAR (scm_sysintern ("proc", SCM_UNDEFINED));
- scm_i_args = SCM_CAR (scm_sysintern ("args", SCM_UNDEFINED));
- scm_i_eval_args = SCM_CAR (scm_sysintern ("eval-args", SCM_UNDEFINED));
-
-#ifdef GUILE_DEBUG
- scm_sysintern ("SCM_IM_AND", SCM_IM_AND);
- scm_sysintern ("SCM_IM_BEGIN", SCM_IM_BEGIN);
- scm_sysintern ("SCM_IM_CASE", SCM_IM_CASE);
- scm_sysintern ("SCM_IM_COND", SCM_IM_COND);
- scm_sysintern ("SCM_IM_DO", SCM_IM_DO);
- scm_sysintern ("SCM_IM_IF", SCM_IM_IF);
- scm_sysintern ("SCM_IM_LAMBDA", SCM_IM_LAMBDA);
- scm_sysintern ("SCM_IM_LET", SCM_IM_LET);
- scm_sysintern ("SCM_IM_LETSTAR", SCM_IM_LETSTAR);
- scm_sysintern ("SCM_IM_LETREC", SCM_IM_LETREC);
- scm_sysintern ("SCM_IM_OR", SCM_IM_OR);
- scm_sysintern ("SCM_IM_QUOTE", SCM_IM_QUOTE);
- scm_sysintern ("SCM_IM_SET_X", SCM_IM_SET_X);
- scm_sysintern ("SCM_IM_DEFINE", SCM_IM_DEFINE);
- scm_sysintern ("SCM_IM_APPLY", SCM_IM_APPLY);
- scm_sysintern ("SCM_IM_CONT", SCM_IM_CONT);
- scm_sysintern ("SCM_IM_DISPATCH", SCM_IM_DISPATCH);
-#endif
- scm_add_feature ("debug-extensions");
-
-#include "debug.x"
-}
+/* Debugging extensions for Guile
+ * Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2002, 2003, 2006, 2008 Free Software Foundation
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "libguile/_scm.h"
+#include "libguile/async.h"
+#include "libguile/eval.h"
+#include "libguile/list.h"
+#include "libguile/stackchk.h"
+#include "libguile/throw.h"
+#include "libguile/macros.h"
+#include "libguile/smob.h"
+#include "libguile/procprop.h"
+#include "libguile/srcprop.h"
+#include "libguile/alist.h"
+#include "libguile/continuations.h"
+#include "libguile/strports.h"
+#include "libguile/read.h"
+#include "libguile/feature.h"
+#include "libguile/dynwind.h"
+#include "libguile/modules.h"
+#include "libguile/ports.h"
+#include "libguile/root.h"
+#include "libguile/fluids.h"
+#include "libguile/objects.h"
+
+#include "libguile/validate.h"
+#include "libguile/debug.h"
+
+#include "libguile/private-options.h"
+\f
+
+
+/* {Run time control of the debugging evaluator}
+ */
+
+SCM_DEFINE (scm_debug_options, "debug-options-interface", 0, 1, 0,
+ (SCM setting),
+ "Option interface for the debug options. Instead of using\n"
+ "this procedure directly, use the procedures @code{debug-enable},\n"
+ "@code{debug-disable}, @code{debug-set!} and @code{debug-options}.")
+#define FUNC_NAME s_scm_debug_options
+{
+ SCM ans;
+
+ scm_dynwind_begin (0);
+ scm_dynwind_critical_section (SCM_BOOL_F);
+
+ ans = scm_options (setting, scm_debug_opts, FUNC_NAME);
+ if (!(1 <= SCM_N_FRAMES && SCM_N_FRAMES <= SCM_MAX_FRAME_SIZE))
+ {
+ scm_options (ans, scm_debug_opts, FUNC_NAME);
+ SCM_OUT_OF_RANGE (1, setting);
+ }
+ SCM_RESET_DEBUG_MODE;
+ scm_stack_checking_enabled_p = SCM_STACK_CHECKING_P;
+ scm_debug_eframe_size = 2 * SCM_N_FRAMES;
+
+ scm_dynwind_end ();
+ return ans;
+}
+#undef FUNC_NAME
+
+
+static void
+with_traps_before (void *data)
+{
+ int *trap_flag = data;
+ *trap_flag = SCM_TRAPS_P;
+ SCM_TRAPS_P = 1;
+}
+
+static void
+with_traps_after (void *data)
+{
+ int *trap_flag = data;
+ SCM_TRAPS_P = *trap_flag;
+}
+
+static SCM
+with_traps_inner (void *data)
+{
+ SCM thunk = SCM_PACK ((scm_t_bits) data);
+ return scm_call_0 (thunk);
+}
+
+SCM_DEFINE (scm_with_traps, "with-traps", 1, 0, 0,
+ (SCM thunk),
+ "Call @var{thunk} with traps enabled.")
+#define FUNC_NAME s_scm_with_traps
+{
+ int trap_flag;
+ SCM_VALIDATE_THUNK (1, thunk);
+ return scm_internal_dynamic_wind (with_traps_before,
+ with_traps_inner,
+ with_traps_after,
+ (void *) SCM_UNPACK (thunk),
+ &trap_flag);
+}
+#undef FUNC_NAME
+
+\f
+SCM_SYMBOL (scm_sym_procname, "procname");
+SCM_SYMBOL (scm_sym_dots, "...");
+SCM_SYMBOL (scm_sym_source, "source");
+
+/* {Memoized Source}
+ */
+
+scm_t_bits scm_tc16_memoized;
+
+static int
+memoized_print (SCM obj, SCM port, scm_print_state *pstate)
+{
+ int writingp = SCM_WRITINGP (pstate);
+ scm_puts ("#<memoized ", port);
+ SCM_SET_WRITINGP (pstate, 1);
+ scm_iprin1 (SCM_MEMOIZED_EXP (obj), port, pstate);
+ SCM_SET_WRITINGP (pstate, writingp);
+ scm_putc ('>', port);
+ return 1;
+}
+
+SCM_DEFINE (scm_memoized_p, "memoized?", 1, 0, 0,
+ (SCM obj),
+ "Return @code{#t} if @var{obj} is memoized.")
+#define FUNC_NAME s_scm_memoized_p
+{
+ return scm_from_bool(SCM_MEMOIZEDP (obj));
+}
+#undef FUNC_NAME
+
+SCM
+scm_make_memoized (SCM exp, SCM env)
+{
+ /* *fixme* Check that env is a valid environment. */
+ SCM_RETURN_NEWSMOB (scm_tc16_memoized, SCM_UNPACK (scm_cons (exp, env)));
+}
+
+#ifdef GUILE_DEBUG
+/*
+ * Some primitives for construction of memoized code
+ *
+ * - procedure: memcons CAR CDR [ENV]
+ *
+ * Construct a pair, encapsulated in a memoized object.
+ *
+ * The CAR and CDR can be either normal or memoized. If ENV isn't
+ * specified, the top-level environment of the current module will
+ * be assumed. All environments must match.
+ *
+ * - procedure: make-iloc FRAME BINDING CDRP
+ *
+ * Return an iloc referring to frame no. FRAME, binding
+ * no. BINDING. If CDRP is non-#f, the iloc is referring to a
+ * frame consisting of a single pair, with the value stored in the
+ * CDR.
+ *
+ * - procedure: iloc? OBJECT
+ *
+ * Return #t if OBJECT is an iloc.
+ *
+ * - procedure: mem->proc MEMOIZED
+ *
+ * Construct a closure from the memoized lambda expression MEMOIZED
+ *
+ * WARNING! The code is not copied!
+ *
+ * - procedure: proc->mem CLOSURE
+ *
+ * Turn the closure CLOSURE into a memoized object.
+ *
+ * WARNING! The code is not copied!
+ *
+ * - constant: SCM_IM_AND
+ * - constant: SCM_IM_BEGIN
+ * - constant: SCM_IM_CASE
+ * - constant: SCM_IM_COND
+ * - constant: SCM_IM_DO
+ * - constant: SCM_IM_IF
+ * - constant: SCM_IM_LAMBDA
+ * - constant: SCM_IM_LET
+ * - constant: SCM_IM_LETSTAR
+ * - constant: SCM_IM_LETREC
+ * - constant: SCM_IM_OR
+ * - constant: SCM_IM_QUOTE
+ * - constant: SCM_IM_SET
+ * - constant: SCM_IM_DEFINE
+ * - constant: SCM_IM_APPLY
+ * - constant: SCM_IM_CONT
+ * - constant: SCM_IM_DISPATCH
+ */
+
+#include "libguile/variable.h"
+#include "libguile/procs.h"
+
+SCM_DEFINE (scm_memcons, "memcons", 2, 1, 0,
+ (SCM car, SCM cdr, SCM env),
+ "Return a new memoized cons cell with @var{car} and @var{cdr}\n"
+ "as members and @var{env} as the environment.")
+#define FUNC_NAME s_scm_memcons
+{
+ if (SCM_MEMOIZEDP (car))
+ {
+ /*fixme* environments may be two different but equal top-level envs */
+ if (!SCM_UNBNDP (env) && SCM_MEMOIZED_ENV (car) != env)
+ SCM_MISC_ERROR ("environment mismatch arg1 <-> arg3",
+ scm_list_2 (car, env));
+ else
+ env = SCM_MEMOIZED_ENV (car);
+ car = SCM_MEMOIZED_EXP (car);
+ }
+ if (SCM_MEMOIZEDP (cdr))
+ {
+ if (!SCM_UNBNDP (env) && SCM_MEMOIZED_ENV (cdr) != env)
+ SCM_MISC_ERROR ("environment mismatch arg2 <-> arg3",
+ scm_list_2 (cdr, env));
+ else
+ env = SCM_MEMOIZED_ENV (cdr);
+ cdr = SCM_MEMOIZED_EXP (cdr);
+ }
+ if (SCM_UNBNDP (env))
+ env = scm_top_level_env (SCM_TOP_LEVEL_LOOKUP_CLOSURE);
+ else
+ SCM_VALIDATE_NULLORCONS (3, env);
+ return scm_make_memoized (scm_cons (car, cdr), env);
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_mem_to_proc, "mem->proc", 1, 0, 0,
+ (SCM obj),
+ "Convert a memoized object (which must represent a body)\n"
+ "to a procedure.")
+#define FUNC_NAME s_scm_mem_to_proc
+{
+ SCM env;
+ SCM_VALIDATE_MEMOIZED (1, obj);
+ env = SCM_MEMOIZED_ENV (obj);
+ obj = SCM_MEMOIZED_EXP (obj);
+ return scm_closure (obj, env);
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_proc_to_mem, "proc->mem", 1, 0, 0,
+ (SCM obj),
+ "Convert a procedure to a memoized object.")
+#define FUNC_NAME s_scm_proc_to_mem
+{
+ SCM_VALIDATE_CLOSURE (1, obj);
+ return scm_make_memoized (SCM_CODE (obj), SCM_ENV (obj));
+}
+#undef FUNC_NAME
+
+#endif /* GUILE_DEBUG */
+
+SCM_DEFINE (scm_i_unmemoize_expr, "unmemoize-expr", 1, 0, 0,
+ (SCM m),
+ "Unmemoize the memoized expression @var{m},")
+#define FUNC_NAME s_scm_i_unmemoize_expr
+{
+ SCM_VALIDATE_MEMOIZED (1, m);
+ return scm_i_unmemocopy_expr (SCM_MEMOIZED_EXP (m), SCM_MEMOIZED_ENV (m));
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_memoized_environment, "memoized-environment", 1, 0, 0,
+ (SCM m),
+ "Return the environment of the memoized expression @var{m}.")
+#define FUNC_NAME s_scm_memoized_environment
+{
+ SCM_VALIDATE_MEMOIZED (1, m);
+ return SCM_MEMOIZED_ENV (m);
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_procedure_name, "procedure-name", 1, 0, 0,
+ (SCM proc),
+ "Return the name of the procedure @var{proc}")
+#define FUNC_NAME s_scm_procedure_name
+{
+ SCM_VALIDATE_PROC (1, proc);
+ switch (SCM_TYP7 (proc)) {
+ case scm_tcs_subrs:
+ return SCM_SNAME (proc);
+ default:
+ {
+ SCM name = scm_procedure_property (proc, scm_sym_name);
+#if 0
+ /* Source property scm_sym_procname not implemented yet... */
+ SCM name = scm_source_property (SCM_CAR (SCM_CLOSURE_BODY (proc)), scm_sym_procname);
+ if (scm_is_false (name))
+ name = scm_procedure_property (proc, scm_sym_name);
+#endif
+ if (scm_is_false (name) && SCM_CLOSUREP (proc))
+ name = scm_reverse_lookup (SCM_ENV (proc), proc);
+ return name;
+ }
+ }
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_procedure_source, "procedure-source", 1, 0, 0,
+ (SCM proc),
+ "Return the source of the procedure @var{proc}.")
+#define FUNC_NAME s_scm_procedure_source
+{
+ SCM_VALIDATE_NIM (1, proc);
+ again:
+ switch (SCM_TYP7 (proc)) {
+ case scm_tcs_closures:
+ {
+ const SCM formals = SCM_CLOSURE_FORMALS (proc);
+ const SCM body = SCM_CLOSURE_BODY (proc);
+ const SCM src = scm_source_property (body, scm_sym_copy);
+
+ if (scm_is_true (src))
+ {
+ return scm_cons2 (scm_sym_lambda, formals, src);
+ }
+ else
+ {
+ const SCM env = SCM_EXTEND_ENV (formals, SCM_EOL, SCM_ENV (proc));
+ return scm_cons2 (scm_sym_lambda,
+ scm_i_finite_list_copy (formals),
+ scm_i_unmemocopy_body (body, env));
+ }
+ }
+ case scm_tcs_struct:
+ if (!SCM_I_OPERATORP (proc))
+ break;
+ goto procprop;
+ case scm_tc7_smob:
+ if (!SCM_SMOB_DESCRIPTOR (proc).apply)
+ break;
+ case scm_tcs_subrs:
+#ifdef CCLO
+ case scm_tc7_cclo:
+#endif
+ procprop:
+ /* It would indeed be a nice thing if we supplied source even for
+ built in procedures! */
+ return scm_procedure_property (proc, scm_sym_source);
+ case scm_tc7_pws:
+ {
+ SCM src = scm_procedure_property (proc, scm_sym_source);
+ if (scm_is_true (src))
+ return src;
+ proc = SCM_PROCEDURE (proc);
+ goto again;
+ }
+ default:
+ ;
+ }
+ SCM_WRONG_TYPE_ARG (1, proc);
+ return SCM_BOOL_F; /* not reached */
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_procedure_environment, "procedure-environment", 1, 0, 0,
+ (SCM proc),
+ "Return the environment of the procedure @var{proc}.")
+#define FUNC_NAME s_scm_procedure_environment
+{
+ SCM_VALIDATE_NIM (1, proc);
+ switch (SCM_TYP7 (proc)) {
+ case scm_tcs_closures:
+ return SCM_ENV (proc);
+ case scm_tcs_subrs:
+#ifdef CCLO
+ case scm_tc7_cclo:
+#endif
+ return SCM_EOL;
+ default:
+ SCM_WRONG_TYPE_ARG (1, proc);
+ /* not reached */
+ }
+}
+#undef FUNC_NAME
+
+\f
+
+/* Eval in a local environment. We would like to have the ability to
+ * evaluate in a specified local environment, but due to the
+ * memoization this isn't normally possible. We solve it by copying
+ * the code before evaluating. One solution would be to have eval.c
+ * generate yet another evaluator. They are not very big actually.
+ */
+SCM_DEFINE (scm_local_eval, "local-eval", 1, 1, 0,
+ (SCM exp, SCM env),
+ "Evaluate @var{exp} in its environment. If @var{env} is supplied,\n"
+ "it is the environment in which to evaluate @var{exp}. Otherwise,\n"
+ "@var{exp} must be a memoized code object (in which case, its environment\n"
+ "is implicit).")
+#define FUNC_NAME s_scm_local_eval
+{
+ if (SCM_UNBNDP (env))
+ {
+ SCM_VALIDATE_MEMOIZED (1, exp);
+ return scm_i_eval_x (SCM_MEMOIZED_EXP (exp), SCM_MEMOIZED_ENV (exp));
+ }
+ return scm_i_eval (exp, env);
+}
+#undef FUNC_NAME
+
+#if 0
+SCM_REGISTER_PROC (s_reverse_lookup, "reverse-lookup", 2, 0, 0, scm_reverse_lookup);
+#endif
+
+SCM
+scm_reverse_lookup (SCM env, SCM data)
+{
+ while (scm_is_pair (env) && scm_is_pair (SCM_CAR (env)))
+ {
+ SCM names = SCM_CAAR (env);
+ SCM values = SCM_CDAR (env);
+ while (scm_is_pair (names))
+ {
+ if (scm_is_eq (SCM_CAR (values), data))
+ return SCM_CAR (names);
+ names = SCM_CDR (names);
+ values = SCM_CDR (values);
+ }
+ if (!scm_is_null (names) && scm_is_eq (values, data))
+ return names;
+ env = SCM_CDR (env);
+ }
+ return SCM_BOOL_F;
+}
+
+SCM
+scm_start_stack (SCM id, SCM exp, SCM env)
+{
+ SCM answer;
+ scm_t_debug_frame vframe;
+ scm_t_debug_info vframe_vect_body;
+ vframe.prev = scm_i_last_debug_frame ();
+ vframe.status = SCM_VOIDFRAME;
+ vframe.vect = &vframe_vect_body;
+ vframe.vect[0].id = id;
+ scm_i_set_last_debug_frame (&vframe);
+ answer = scm_i_eval (exp, env);
+ scm_i_set_last_debug_frame (vframe.prev);
+ return answer;
+}
+
+SCM_SYNTAX(s_start_stack, "start-stack", scm_makacro, scm_m_start_stack);
+
+static SCM
+scm_m_start_stack (SCM exp, SCM env)
+#define FUNC_NAME s_start_stack
+{
+ exp = SCM_CDR (exp);
+ if (!scm_is_pair (exp)
+ || !scm_is_pair (SCM_CDR (exp))
+ || !scm_is_null (SCM_CDDR (exp)))
+ SCM_WRONG_NUM_ARGS ();
+ return scm_start_stack (scm_eval_car (exp, env), SCM_CADR (exp), env);
+}
+#undef FUNC_NAME
+
+
+/* {Debug Objects}
+ *
+ * The debugging evaluator throws these on frame traps.
+ */
+
+scm_t_bits scm_tc16_debugobj;
+
+static int
+debugobj_print (SCM obj, SCM port, scm_print_state *pstate SCM_UNUSED)
+{
+ scm_puts ("#<debug-object ", port);
+ scm_intprint ((long) SCM_DEBUGOBJ_FRAME (obj), 16, port);
+ scm_putc ('>', port);
+ return 1;
+}
+
+SCM_DEFINE (scm_debug_object_p, "debug-object?", 1, 0, 0,
+ (SCM obj),
+ "Return @code{#t} if @var{obj} is a debug object.")
+#define FUNC_NAME s_scm_debug_object_p
+{
+ return scm_from_bool(SCM_DEBUGOBJP (obj));
+}
+#undef FUNC_NAME
+
+
+SCM
+scm_make_debugobj (scm_t_debug_frame *frame)
+{
+ return scm_cell (scm_tc16_debugobj, (scm_t_bits) frame);
+}
+
+\f
+
+/* Undocumented debugging procedure */
+#ifdef GUILE_DEBUG
+SCM_DEFINE (scm_debug_hang, "debug-hang", 0, 1, 0,
+ (SCM obj),
+ "Go into an endless loop, which can be only terminated with\n"
+ "a debugger.")
+#define FUNC_NAME s_scm_debug_hang
+{
+ int go = 0;
+ while (!go) ;
+ return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+#endif
+
+\f
+
+void
+scm_init_debug ()
+{
+ scm_init_opts (scm_debug_options, scm_debug_opts);
+
+ scm_tc16_memoized = scm_make_smob_type ("memoized", 0);
+ scm_set_smob_print (scm_tc16_memoized, memoized_print);
+
+ scm_tc16_debugobj = scm_make_smob_type ("debug-object", 0);
+ scm_set_smob_print (scm_tc16_debugobj, debugobj_print);
+
+#ifdef GUILE_DEBUG
+ scm_c_define ("SCM_IM_AND", SCM_IM_AND);
+ scm_c_define ("SCM_IM_BEGIN", SCM_IM_BEGIN);
+ scm_c_define ("SCM_IM_CASE", SCM_IM_CASE);
+ scm_c_define ("SCM_IM_COND", SCM_IM_COND);
+ scm_c_define ("SCM_IM_DO", SCM_IM_DO);
+ scm_c_define ("SCM_IM_IF", SCM_IM_IF);
+ scm_c_define ("SCM_IM_LAMBDA", SCM_IM_LAMBDA);
+ scm_c_define ("SCM_IM_LET", SCM_IM_LET);
+ scm_c_define ("SCM_IM_LETSTAR", SCM_IM_LETSTAR);
+ scm_c_define ("SCM_IM_LETREC", SCM_IM_LETREC);
+ scm_c_define ("SCM_IM_OR", SCM_IM_OR);
+ scm_c_define ("SCM_IM_QUOTE", SCM_IM_QUOTE);
+ scm_c_define ("SCM_IM_SET_X", SCM_IM_SET_X);
+ scm_c_define ("SCM_IM_DEFINE", SCM_IM_DEFINE);
+ scm_c_define ("SCM_IM_APPLY", SCM_IM_APPLY);
+ scm_c_define ("SCM_IM_CONT", SCM_IM_CONT);
+ scm_c_define ("SCM_IM_DISPATCH", SCM_IM_DISPATCH);
+#endif
+ scm_add_feature ("debug-extensions");
+
+#include "libguile/debug.x"
+}
+
+/*
+ Local Variables:
+ c-file-style: "gnu"
+ End:
+*/
HCoop / bpt / guile.git / blobdiff