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Code Activity

* eval.c (sym_instead): New symbol.

Browse source 
(ENTER_APPLY): Remove optional use of a continuation when making
trap call.
(scm_debug_opts): Change doc for 'cheap option to make clear that
it is now obsolete.
(CEVAL, SCM_APPLY): Remove optional use of a continuation when
making trap calls, and implement substitution of eval expressions
and return values using the values that the trap call handlers
return.

* debug.h (SCM_CHEAPTRAPS_P): Removed.
This commit is contained in:
Neil Jerram 2005-11-04 21:20:24 +00:00
parent 69b45df38b
commit 7c9c0169b4
3 changed files with 42 additions and 85 deletions
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14
libguile/ChangeLog
View file

@ -1,3 +1,17 @@
2005-11-04 Neil Jerram <neil@ossau.uklinux.net>
* eval.c (sym_instead): New symbol.
(ENTER_APPLY): Remove optional use of a continuation when making
trap call.
(scm_debug_opts): Change doc for 'cheap option to make clear that
it is now obsolete.
(CEVAL, SCM_APPLY): Remove optional use of a continuation when
making trap calls, and implement substitution of eval expressions
and return values using the values that the trap call handlers
return.
* debug.h (SCM_CHEAPTRAPS_P): Removed.
2005-10-27 Ludovic Courtès <ludovic.courtes@laas.fr>
* socket.c (scm_fill_sockaddr): No need to check NULL from scm_malloc.

1
libguile/debug.h
View file

@ -44,7 +44,6 @@
SCM_API scm_t_option scm_debug_opts[];
#define SCM_CHEAPTRAPS_P scm_debug_opts[0].val
#define SCM_BREAKPOINTS_P scm_debug_opts[1].val
#define SCM_TRACE_P scm_debug_opts[2].val
#define SCM_REC_PROCNAMES_P scm_debug_opts[3].val

94
libguile/eval.c
View file

@ -2537,6 +2537,7 @@ SCM_GLOBAL_SYMBOL (scm_sym_enter_frame, "enter-frame");
SCM_GLOBAL_SYMBOL (scm_sym_apply_frame, "apply-frame");
SCM_GLOBAL_SYMBOL (scm_sym_exit_frame, "exit-frame");
SCM_GLOBAL_SYMBOL (scm_sym_trace, "trace");
SCM_SYMBOL (sym_instead, "instead");
/* A function object to implement "apply" for non-closure functions. */
static SCM f_apply;
@ -3008,18 +3009,8 @@ do { \
SCM tmp, tail = scm_from_bool(SCM_TRACED_FRAME_P (debug)); \
SCM_SET_TRACED_FRAME (debug); \
SCM_TRAPS_P = 0;\
if (SCM_CHEAPTRAPS_P)\
{\
tmp = scm_make_debugobj (&debug);\
scm_call_3 (SCM_APPLY_FRAME_HDLR, scm_sym_apply_frame, tmp, tail);\
}\
else\
{\
int first;\
tmp = scm_make_continuation (&first);\
if (first)\
scm_call_3 (SCM_APPLY_FRAME_HDLR, scm_sym_apply_frame, tmp, tail);\
}\
SCM_TRAPS_P = 1;\
}\
} while (0)
@ -3059,7 +3050,7 @@ scm_t_option scm_eval_opts[] = {
scm_t_option scm_debug_opts[] = {
{ SCM_OPTION_BOOLEAN, "cheap", 1,
"*Flyweight representation of the stack at traps." },
"*This option is now obsolete. Setting it has no effect." },
{ SCM_OPTION_BOOLEAN, "breakpoints", 0, "*Check for breakpoints." },
{ SCM_OPTION_BOOLEAN, "trace", 0, "*Trace mode." },
{ SCM_OPTION_BOOLEAN, "procnames", 1,
@ -3287,33 +3278,23 @@ start:
SCM stackrep;
SCM tail = scm_from_bool (SCM_TAILRECP (debug));
SCM_SET_TAILREC (debug);
if (SCM_CHEAPTRAPS_P)
stackrep = scm_make_debugobj (&debug);
else
{
int first;
SCM val = scm_make_continuation (&first);
if (first)
stackrep = val;
else
{
x = val;
if (SCM_IMP (x))
RETURN (x);
else
/* This gives the possibility for the debugger to
modify the source expression before evaluation. */
goto dispatch;
}
}
SCM_TRAPS_P = 0;
scm_call_4 (SCM_ENTER_FRAME_HDLR,
stackrep = scm_call_4 (SCM_ENTER_FRAME_HDLR,
scm_sym_enter_frame,
stackrep,
tail,
unmemoize_expression (x, env));
SCM_TRAPS_P = 1;
if (scm_is_pair (stackrep) &&
scm_is_eq (SCM_CAR (stackrep), sym_instead))
{
/* This gives the possibility for the debugger to modify
the source expression before evaluation. */
x = SCM_CDR (stackrep);
if (SCM_IMP (x))
RETURN (x);
}
}
}
#endif
@ -4596,26 +4577,13 @@ exit:
if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug)))
{
SCM_CLEAR_TRACED_FRAME (debug);
if (SCM_CHEAPTRAPS_P)
arg1 = scm_make_debugobj (&debug);
else
{
int first;
SCM val = scm_make_continuation (&first);
if (first)
arg1 = val;
else
{
proc = val;
goto ret;
}
}
SCM_TRAPS_P = 0;
scm_call_3 (SCM_EXIT_FRAME_HDLR, scm_sym_exit_frame, arg1, proc);
arg1 = scm_call_3 (SCM_EXIT_FRAME_HDLR, scm_sym_exit_frame, arg1, proc);
SCM_TRAPS_P = 1;
if (scm_is_pair (arg1) && scm_is_eq (SCM_CAR (arg1), sym_instead))
proc = SCM_CDR (arg1);
}
ret:
scm_i_set_last_debug_frame (debug.prev);
return proc;
#endif
@ -4825,22 +4793,11 @@ SCM_APPLY (SCM proc, SCM arg1, SCM args)
#ifdef DEVAL
if (SCM_ENTER_FRAME_P && SCM_TRAPS_P)
{
SCM tmp;
if (SCM_CHEAPTRAPS_P)
tmp = scm_make_debugobj (&debug);
else
{
int first;
tmp = scm_make_continuation (&first);
if (!first)
goto entap;
}
SCM tmp = scm_make_debugobj (&debug);
SCM_TRAPS_P = 0;
scm_call_2 (SCM_ENTER_FRAME_HDLR, scm_sym_enter_frame, tmp);
SCM_TRAPS_P = 1;
}
entap:
ENTER_APPLY;
#endif
tail:
@ -5056,26 +5013,13 @@ exit:
if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug)))
{
SCM_CLEAR_TRACED_FRAME (debug);
if (SCM_CHEAPTRAPS_P)
arg1 = scm_make_debugobj (&debug);
else
{
int first;
SCM val = scm_make_continuation (&first);
if (first)
arg1 = val;
else
{
proc = val;
goto ret;
}
}
SCM_TRAPS_P = 0;
scm_call_3 (SCM_EXIT_FRAME_HDLR, scm_sym_exit_frame, arg1, proc);
arg1 = scm_call_3 (SCM_EXIT_FRAME_HDLR, scm_sym_exit_frame, arg1, proc);
SCM_TRAPS_P = 1;
if (scm_is_pair (arg1) && scm_is_eq (SCM_CAR (arg1), sym_instead))
proc = SCM_CDR (arg1);
}
ret:
scm_i_set_last_debug_frame (debug.prev);
return proc;
#endif