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/* COPYRIGHT (c) 1992-1994 BY
* MITECH CORPORATION, ACTON, MASSACHUSETTS.
* See the source file SLIB.C for more information.
(trace procedure1 procedure2 ...)
(untrace procedure1 procedure2 ...)
Currently only user-defined procedures can be traced.
Fancy printing features such as indentation based on
recursion level will also have to wait for a future version.
*/
#include <stdio.h>
#include <stdlib.h>
#include <setjmp.h>
#include "siod.h"
#include "siodp.h"
static void
init_trace_version (void)
{
setvar (cintern ("*trace-version*"),
cintern ("$Id: trace.c,v 1.4 2003/12/04 13:21:25 mitch Exp $"),
NIL);
}
static long tc_closure_traced = 0;
static LISP sym_traced = NIL;
static LISP sym_quote = NIL;
static LISP sym_begin = NIL;
LISP ltrace_fcn_name (LISP body);
LISP ltrace_1 (LISP fcn_name, LISP env);
LISP ltrace (LISP fcn_names, LISP env);
LISP luntrace_1 (LISP fcn);
LISP luntrace (LISP fcns);
static void ct_gc_scan (LISP ptr);
static LISP ct_gc_mark (LISP ptr);
void ct_prin1 (LISP ptr, struct gen_printio *f);
LISP ct_eval (LISP ct, LISP * px, LISP * penv);
LISP
ltrace_fcn_name (LISP body)
{
LISP tmp;
if NCONSP
(body) return (NIL);
if NEQ
(CAR (body), sym_begin) return (NIL);
tmp = CDR (body);
if NCONSP
(tmp) return (NIL);
tmp = CAR (tmp);
if NCONSP
(tmp) return (NIL);
if NEQ
(CAR (tmp), sym_quote) return (NIL);
tmp = CDR (tmp);
if NCONSP
(tmp) return (NIL);
return (CAR (tmp));
}
LISP
ltrace_1 (LISP fcn_name, LISP env)
{
LISP fcn, code;
fcn = leval (fcn_name, env);
if (TYPE (fcn) == tc_closure)
{
code = fcn->storage_as.closure.code;
if NULLP
(ltrace_fcn_name (cdr (code)))
setcdr (code, cons (sym_begin,
cons (cons (sym_quote, cons (fcn_name, NIL)),
cons (cdr (code), NIL))));
fcn->type = tc_closure_traced;
}
else if (TYPE (fcn) == tc_closure_traced)
;
else
my_err ("not a closure, cannot trace", fcn);
return (NIL);
}
LISP
ltrace (LISP fcn_names, LISP env)
{
LISP l;
for (l = fcn_names; NNULLP (l); l = cdr (l))
ltrace_1 (car (l), env);
return (NIL);
}
LISP
luntrace_1 (LISP fcn)
{
if (TYPE (fcn) == tc_closure)
;
else if (TYPE (fcn) == tc_closure_traced)
fcn->type = tc_closure;
else
my_err ("not a closure, cannot untrace", fcn);
return (NIL);
}
LISP
luntrace (LISP fcns)
{
LISP l;
for (l = fcns; NNULLP (l); l = cdr (l))
luntrace_1 (car (l));
return (NIL);
}
static void
ct_gc_scan (LISP ptr)
{
CAR (ptr) = gc_relocate (CAR (ptr));
CDR (ptr) = gc_relocate (CDR (ptr));
}
static LISP
ct_gc_mark (LISP ptr)
{
gc_mark (ptr->storage_as.closure.code);
return (ptr->storage_as.closure.env);
}
void
ct_prin1 (LISP ptr, struct gen_printio *f)
{
gput_st (f, "#<CLOSURE(TRACED) ");
lprin1g (car (ptr->storage_as.closure.code), f);
gput_st (f, " ");
lprin1g (cdr (ptr->storage_as.closure.code), f);
gput_st (f, ">");
}
LISP
ct_eval (LISP ct, LISP * px, LISP * penv)
{
LISP fcn_name, args, env, result, l;
fcn_name = ltrace_fcn_name (cdr (ct->storage_as.closure.code));
args = leval_args (CDR (*px), *penv);
fput_st (stdout, "->");
lprin1f (fcn_name, stdout);
for (l = args; NNULLP (l); l = cdr (l))
{
fput_st (stdout, " ");
lprin1f (car (l), stdout);
}
fput_st (stdout, "\n");
env = extend_env (args,
car (ct->storage_as.closure.code),
ct->storage_as.closure.env);
result = leval (cdr (ct->storage_as.closure.code), env);
fput_st (stdout, "<-");
lprin1f (fcn_name, stdout);
fput_st (stdout, " ");
lprin1f (result, stdout);
fput_st (stdout, "\n");
*px = result;
return (NIL);
}
void
init_trace (void)
{
long j;
tc_closure_traced = allocate_user_tc ();
set_gc_hooks (tc_closure_traced,
NULL,
ct_gc_mark,
ct_gc_scan,
NULL,
&j);
gc_protect_sym (&sym_traced, "*traced*");
setvar (sym_traced, NIL, NIL);
gc_protect_sym (&sym_begin, "begin");
gc_protect_sym (&sym_quote, "quote");
set_print_hooks (tc_closure_traced, ct_prin1);
set_eval_hooks (tc_closure_traced, ct_eval);
init_fsubr ("trace", ltrace);
init_lsubr ("untrace", luntrace);
init_trace_version ();
}
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