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|
/* 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"
/* {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);
}
static SCM scm_sym_source, scm_sym_dots;
static SCM scm_sym_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_sym_name);
#if 0
/* Source property scm_sym_procname not implemented yet... */
SCM name = scm_source_property (SCM_CAR (SCM_CDR (SCM_CODE (proc))), scm_sym_procname);
if (SCM_FALSEP (name))
name = scm_procedure_property (proc, scm_sym_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_sym_copy);
if (src != SCM_BOOL_F)
return scm_cons2 (scm_sym_lambda, SCM_CAR (SCM_CODE (proc)), src);
src = SCM_CODE (proc);
return scm_cons (scm_sym_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_sym_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;
}
}
/* 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;
}
/* 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
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_sym_procname = SCM_CAR (scm_sysintern ("procname", SCM_UNDEFINED));
scm_sym_dots = SCM_CAR (scm_sysintern ("...", SCM_UNDEFINED));
scm_sym_source = SCM_CAR (scm_sysintern ("source", 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"
}
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