/* Evaluator for GNU Emacs Lisp interpreter.
-Copyright (C) 1985-1987, 1993-1995, 1999-2014 Free Software Foundation,
+Copyright (C) 1985-1987, 1993-1995, 1999-2015 Free Software Foundation,
Inc.
This file is part of GNU Emacs.
#include "commands.h"
#include "keyboard.h"
#include "dispextern.h"
+#include "buffer.h"
/* Chain of condition and catch handlers currently in effect. */
int gcpro_level;
#endif
-Lisp_Object Qautoload, Qmacro, Qexit, Qinteractive, Qcommandp;
-Lisp_Object Qinhibit_quit;
-Lisp_Object Qand_rest;
-static Lisp_Object Qand_optional;
-static Lisp_Object Qinhibit_debugger;
-static Lisp_Object Qdeclare;
-Lisp_Object Qinternal_interpreter_environment, Qclosure;
-
-static Lisp_Object Qdebug;
-
-/* This holds either the symbol `run-hooks' or nil.
- It is nil at an early stage of startup, and when Emacs
- is shutting down. */
-
-Lisp_Object Vrun_hooks;
-
/* Non-nil means record all fset's and provide's, to be undone
if the file being autoloaded is not fully loaded.
They are recorded by being consed onto the front of Vautoload_queue:
Lisp_Object Vautoload_queue;
+/* This holds either the symbol `run-hooks' or nil.
+ It is nil at an early stage of startup, and when Emacs
+ is shutting down. */
+Lisp_Object Vrun_hooks;
+
/* Current number of specbindings allocated in specpdl, not counting
the dummy entry specpdl[-1]. */
union specbinding *backtrace_top (void) EXTERNALLY_VISIBLE;
static Lisp_Object funcall_lambda (Lisp_Object, ptrdiff_t, Lisp_Object *);
-static Lisp_Object apply_lambda (Lisp_Object fun, Lisp_Object args);
+static Lisp_Object apply_lambda (Lisp_Object, Lisp_Object, ptrdiff_t);
static Lisp_Object
specpdl_symbol (union specbinding *pdl)
/* Functions to modify slots of backtrace records. */
static void
-set_backtrace_args (union specbinding *pdl, Lisp_Object *args)
+set_backtrace_args (union specbinding *pdl, Lisp_Object *args, ptrdiff_t nargs)
{
eassert (pdl->kind == SPECPDL_BACKTRACE);
pdl->bt.args = args;
-}
-
-static void
-set_backtrace_nargs (union specbinding *pdl, ptrdiff_t n)
-{
- eassert (pdl->kind == SPECPDL_BACKTRACE);
- pdl->bt.nargs = n;
+ pdl->bt.nargs = nargs;
}
static void
}
static void
-do_debug_on_call (Lisp_Object code)
+do_debug_on_call (Lisp_Object code, ptrdiff_t count)
{
debug_on_next_call = 0;
- set_backtrace_debug_on_exit (specpdl_ptr - 1, true);
+ set_backtrace_debug_on_exit (specpdl + count, true);
call_debugger (list1 (code));
}
\f
if (!NILP (Vinternal_interpreter_environment)
&& CONSP (quoted)
&& EQ (XCAR (quoted), Qlambda))
- /* This is a lambda expression within a lexical environment;
- return an interpreted closure instead of a simple lambda. */
- return Fcons (Qclosure, Fcons (Vinternal_interpreter_environment,
- XCDR (quoted)));
+ { /* This is a lambda expression within a lexical environment;
+ return an interpreted closure instead of a simple lambda. */
+ Lisp_Object cdr = XCDR (quoted);
+ Lisp_Object tmp = cdr;
+ if (CONSP (tmp)
+ && (tmp = XCDR (tmp), CONSP (tmp))
+ && (tmp = XCAR (tmp), CONSP (tmp))
+ && (EQ (QCdocumentation, XCAR (tmp))))
+ { /* Handle the special (:documentation <form>) to build the docstring
+ dynamically. */
+ Lisp_Object docstring = eval_sub (Fcar (XCDR (tmp)));
+ CHECK_STRING (docstring);
+ cdr = Fcons (XCAR (cdr), Fcons (docstring, XCDR (XCDR (cdr))));
+ }
+ return Fcons (Qclosure, Fcons (Vinternal_interpreter_environment,
+ cdr));
+ }
else
/* Simply quote the argument. */
return quoted;
DEFUN ("throw", Fthrow, Sthrow, 2, 2, 0,
doc: /* Throw to the catch for TAG and return VALUE from it.
-Both TAG and VALUE are evalled. */)
+Both TAG and VALUE are evalled. */
+ attributes: noreturn)
(register Lisp_Object tag, Lisp_Object value)
{
struct handler *c;
{ /* The first clause is the one that should be checked first, so it should
be added to handlerlist last. So we build in `clauses' a table that
- contains `handlers' but in reverse order. */
- Lisp_Object *clauses = alloca (clausenb * sizeof (Lisp_Object *));
+ contains `handlers' but in reverse order. SAFE_ALLOCA won't work
+ here due to the setjmp, so impose a MAX_ALLOCA limit. */
+ if (MAX_ALLOCA / word_size < clausenb)
+ memory_full (SIZE_MAX);
+ Lisp_Object *clauses = alloca (clausenb * sizeof *clauses);
Lisp_Object *volatile clauses_volatile = clauses;
int i = clausenb;
for (val = handlers; CONSP (val); val = XCDR (val))
return val;
}
}
- }
+ }
val = eval_sub (bodyform);
handlerlist = oldhandlerlist;
|| NILP (clause)
/* A `debug' symbol in the handler list disables the normal
suppression of the debugger. */
- || (CONSP (clause) && CONSP (clause)
- && !NILP (Fmemq (Qdebug, clause)))
+ || (CONSP (clause) && !NILP (Fmemq (Qdebug, clause)))
/* Special handler that means "print a message and run debugger
if requested". */
|| EQ (h->tag_or_ch, Qerror)))
If non-nil, FUNNAME should be the symbol whose function value is FUNDEF,
in which case the function returns the new autoloaded function value.
If equal to `macro', MACRO-ONLY specifies that FUNDEF should only be loaded if
-it is defines a macro. */)
+it defines a macro. */)
(Lisp_Object fundef, Lisp_Object funname, Lisp_Object macro_only)
{
ptrdiff_t count = SPECPDL_INDEX ();
}
}
-void
+ptrdiff_t
record_in_backtrace (Lisp_Object function, Lisp_Object *args, ptrdiff_t nargs)
{
+ ptrdiff_t count = SPECPDL_INDEX ();
+
eassert (nargs >= UNEVALLED);
specpdl_ptr->bt.kind = SPECPDL_BACKTRACE;
specpdl_ptr->bt.debug_on_exit = false;
specpdl_ptr->bt.args = args;
specpdl_ptr->bt.nargs = nargs;
grow_specpdl ();
+
+ return count;
}
/* Eval a sub-expression of the current expression (i.e. in the same
Lisp_Object fun, val, original_fun, original_args;
Lisp_Object funcar;
struct gcpro gcpro1, gcpro2, gcpro3;
+ ptrdiff_t count;
if (SYMBOLP (form))
{
original_args = XCDR (form);
/* This also protects them from gc. */
- record_in_backtrace (original_fun, &original_args, UNEVALLED);
+ count = record_in_backtrace (original_fun, &original_args, UNEVALLED);
if (debug_on_next_call)
- do_debug_on_call (Qt);
+ do_debug_on_call (Qt, count);
/* At this point, only original_fun and original_args
have values that will be used below. */
gcpro3.nvars = argnum;
}
- set_backtrace_args (specpdl_ptr - 1, vals);
- set_backtrace_nargs (specpdl_ptr - 1, XINT (numargs));
+ set_backtrace_args (specpdl + count, vals, XINT (numargs));
val = (XSUBR (fun)->function.aMANY) (XINT (numargs), vals);
UNGCPRO;
UNGCPRO;
- set_backtrace_args (specpdl_ptr - 1, argvals);
- set_backtrace_nargs (specpdl_ptr - 1, XINT (numargs));
+ set_backtrace_args (specpdl + count, argvals, XINT (numargs));
switch (i)
{
}
}
else if (COMPILEDP (fun))
- val = apply_lambda (fun, original_args);
+ val = apply_lambda (fun, original_args, count);
else
{
if (NILP (fun))
}
if (EQ (funcar, Qmacro))
{
- ptrdiff_t count = SPECPDL_INDEX ();
+ ptrdiff_t count1 = SPECPDL_INDEX ();
Lisp_Object exp;
/* Bind lexical-binding during expansion of the macro, so the
macro can know reliably if the code it outputs will be
specbind (Qlexical_binding,
NILP (Vinternal_interpreter_environment) ? Qnil : Qt);
exp = apply1 (Fcdr (fun), original_args);
- unbind_to (count, Qnil);
+ unbind_to (count1, Qnil);
val = eval_sub (exp);
}
else if (EQ (funcar, Qlambda)
|| EQ (funcar, Qclosure))
- val = apply_lambda (fun, original_args);
+ val = apply_lambda (fun, original_args, count);
else
xsignal1 (Qinvalid_function, original_fun);
}
check_cons_list ();
lisp_eval_depth--;
- if (backtrace_debug_on_exit (specpdl_ptr - 1))
+ if (backtrace_debug_on_exit (specpdl + count))
val = call_debugger (list2 (Qexit, val));
specpdl_ptr--;
usage: (apply FUNCTION &rest ARGUMENTS) */)
(ptrdiff_t nargs, Lisp_Object *args)
{
- ptrdiff_t i;
- EMACS_INT numargs;
- register Lisp_Object spread_arg;
- register Lisp_Object *funcall_args;
- Lisp_Object fun, retval;
- struct gcpro gcpro1;
+ ptrdiff_t i, numargs, funcall_nargs;
+ register Lisp_Object *funcall_args = NULL;
+ register Lisp_Object spread_arg = args[nargs - 1];
+ Lisp_Object fun = args[0];
+ Lisp_Object retval;
USE_SAFE_ALLOCA;
- fun = args [0];
- funcall_args = 0;
- spread_arg = args [nargs - 1];
CHECK_LIST (spread_arg);
numargs = XINT (Flength (spread_arg));
/* Optimize for no indirection. */
if (SYMBOLP (fun) && !NILP (fun)
&& (fun = XSYMBOL (fun)->function, SYMBOLP (fun)))
- fun = indirect_function (fun);
- if (NILP (fun))
{
- /* Let funcall get the error. */
- fun = args[0];
- goto funcall;
+ fun = indirect_function (fun);
+ if (NILP (fun))
+ /* Let funcall get the error. */
+ fun = args[0];
}
- if (SUBRP (fun))
+ if (SUBRP (fun) && XSUBR (fun)->max_args > numargs
+ /* Don't hide an error by adding missing arguments. */
+ && numargs >= XSUBR (fun)->min_args)
{
- if (numargs < XSUBR (fun)->min_args
- || (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args < numargs))
- goto funcall; /* Let funcall get the error. */
- else if (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args > numargs)
- {
- /* Avoid making funcall cons up a yet another new vector of arguments
- by explicitly supplying nil's for optional values. */
- SAFE_ALLOCA_LISP (funcall_args, 1 + XSUBR (fun)->max_args);
- for (i = numargs; i < XSUBR (fun)->max_args;)
- funcall_args[++i] = Qnil;
- GCPRO1 (*funcall_args);
- gcpro1.nvars = 1 + XSUBR (fun)->max_args;
- }
+ /* Avoid making funcall cons up a yet another new vector of arguments
+ by explicitly supplying nil's for optional values. */
+ SAFE_ALLOCA_LISP (funcall_args, 1 + XSUBR (fun)->max_args);
+ memclear (funcall_args + numargs + 1,
+ (XSUBR (fun)->max_args - numargs) * word_size);
+ funcall_nargs = 1 + XSUBR (fun)->max_args;
}
- funcall:
- /* We add 1 to numargs because funcall_args includes the
- function itself as well as its arguments. */
- if (!funcall_args)
- {
+ else
+ { /* We add 1 to numargs because funcall_args includes the
+ function itself as well as its arguments. */
SAFE_ALLOCA_LISP (funcall_args, 1 + numargs);
- GCPRO1 (*funcall_args);
- gcpro1.nvars = 1 + numargs;
+ funcall_nargs = 1 + numargs;
}
memcpy (funcall_args, args, nargs * word_size);
spread_arg = XCDR (spread_arg);
}
- /* By convention, the caller needs to gcpro Ffuncall's args. */
- retval = Ffuncall (gcpro1.nvars, funcall_args);
- UNGCPRO;
- SAFE_FREE ();
+ /* Ffuncall gcpro's all of its args. */
+ retval = Ffuncall (funcall_nargs, funcall_args);
+ SAFE_FREE ();
return retval;
}
\f
usage: (run-hooks &rest HOOKS) */)
(ptrdiff_t nargs, Lisp_Object *args)
{
- Lisp_Object hook[1];
ptrdiff_t i;
for (i = 0; i < nargs; i++)
- {
- hook[0] = args[i];
- run_hook_with_args (1, hook, funcall_nil);
- }
+ run_hook (args[i]);
return Qnil;
}
}
}
+/* Run the hook HOOK, giving each function no args. */
+
+void
+run_hook (Lisp_Object hook)
+{
+ Frun_hook_with_args (1, &hook);
+}
+
/* Run the hook HOOK, giving each function the two args ARG1 and ARG2. */
void
run_hook_with_args_2 (Lisp_Object hook, Lisp_Object arg1, Lisp_Object arg2)
{
- Lisp_Object temp[3];
- temp[0] = hook;
- temp[1] = arg1;
- temp[2] = arg2;
-
- Frun_hook_with_args (3, temp);
+ CALLN (Frun_hook_with_args, hook, arg1, arg2);
}
-\f
+
/* Apply fn to arg. */
Lisp_Object
apply1 (Lisp_Object fn, Lisp_Object arg)
{
- struct gcpro gcpro1;
-
- GCPRO1 (fn);
- if (NILP (arg))
- RETURN_UNGCPRO (Ffuncall (1, &fn));
- gcpro1.nvars = 2;
- {
- Lisp_Object args[2];
- args[0] = fn;
- args[1] = arg;
- gcpro1.var = args;
- RETURN_UNGCPRO (Fapply (2, args));
- }
+ return NILP (arg) ? Ffuncall (1, &fn) : CALLN (Fapply, fn, arg);
}
/* Call function fn on no arguments. */
Lisp_Object
call0 (Lisp_Object fn)
{
- struct gcpro gcpro1;
-
- GCPRO1 (fn);
- RETURN_UNGCPRO (Ffuncall (1, &fn));
+ return Ffuncall (1, &fn);
}
/* Call function fn with 1 argument arg1. */
Lisp_Object
call1 (Lisp_Object fn, Lisp_Object arg1)
{
- struct gcpro gcpro1;
- Lisp_Object args[2];
-
- args[0] = fn;
- args[1] = arg1;
- GCPRO1 (args[0]);
- gcpro1.nvars = 2;
- RETURN_UNGCPRO (Ffuncall (2, args));
+ return CALLN (Ffuncall, fn, arg1);
}
/* Call function fn with 2 arguments arg1, arg2. */
Lisp_Object
call2 (Lisp_Object fn, Lisp_Object arg1, Lisp_Object arg2)
{
- struct gcpro gcpro1;
- Lisp_Object args[3];
- args[0] = fn;
- args[1] = arg1;
- args[2] = arg2;
- GCPRO1 (args[0]);
- gcpro1.nvars = 3;
- RETURN_UNGCPRO (Ffuncall (3, args));
+ return CALLN (Ffuncall, fn, arg1, arg2);
}
/* Call function fn with 3 arguments arg1, arg2, arg3. */
Lisp_Object
call3 (Lisp_Object fn, Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3)
{
- struct gcpro gcpro1;
- Lisp_Object args[4];
- args[0] = fn;
- args[1] = arg1;
- args[2] = arg2;
- args[3] = arg3;
- GCPRO1 (args[0]);
- gcpro1.nvars = 4;
- RETURN_UNGCPRO (Ffuncall (4, args));
+ return CALLN (Ffuncall, fn, arg1, arg2, arg3);
}
/* Call function fn with 4 arguments arg1, arg2, arg3, arg4. */
call4 (Lisp_Object fn, Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3,
Lisp_Object arg4)
{
- struct gcpro gcpro1;
- Lisp_Object args[5];
- args[0] = fn;
- args[1] = arg1;
- args[2] = arg2;
- args[3] = arg3;
- args[4] = arg4;
- GCPRO1 (args[0]);
- gcpro1.nvars = 5;
- RETURN_UNGCPRO (Ffuncall (5, args));
+ return CALLN (Ffuncall, fn, arg1, arg2, arg3, arg4);
}
/* Call function fn with 5 arguments arg1, arg2, arg3, arg4, arg5. */
call5 (Lisp_Object fn, Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3,
Lisp_Object arg4, Lisp_Object arg5)
{
- struct gcpro gcpro1;
- Lisp_Object args[6];
- args[0] = fn;
- args[1] = arg1;
- args[2] = arg2;
- args[3] = arg3;
- args[4] = arg4;
- args[5] = arg5;
- GCPRO1 (args[0]);
- gcpro1.nvars = 6;
- RETURN_UNGCPRO (Ffuncall (6, args));
+ return CALLN (Ffuncall, fn, arg1, arg2, arg3, arg4, arg5);
}
/* Call function fn with 6 arguments arg1, arg2, arg3, arg4, arg5, arg6. */
call6 (Lisp_Object fn, Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3,
Lisp_Object arg4, Lisp_Object arg5, Lisp_Object arg6)
{
- struct gcpro gcpro1;
- Lisp_Object args[7];
- args[0] = fn;
- args[1] = arg1;
- args[2] = arg2;
- args[3] = arg3;
- args[4] = arg4;
- args[5] = arg5;
- args[6] = arg6;
- GCPRO1 (args[0]);
- gcpro1.nvars = 7;
- RETURN_UNGCPRO (Ffuncall (7, args));
+ return CALLN (Ffuncall, fn, arg1, arg2, arg3, arg4, arg5, arg6);
}
/* Call function fn with 7 arguments arg1, arg2, arg3, arg4, arg5, arg6, arg7. */
call7 (Lisp_Object fn, Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3,
Lisp_Object arg4, Lisp_Object arg5, Lisp_Object arg6, Lisp_Object arg7)
{
- struct gcpro gcpro1;
- Lisp_Object args[8];
- args[0] = fn;
- args[1] = arg1;
- args[2] = arg2;
- args[3] = arg3;
- args[4] = arg4;
- args[5] = arg5;
- args[6] = arg6;
- args[7] = arg7;
- GCPRO1 (args[0]);
- gcpro1.nvars = 8;
- RETURN_UNGCPRO (Ffuncall (8, args));
+ return CALLN (Ffuncall, fn, arg1, arg2, arg3, arg4, arg5, arg6, arg7);
}
/* The caller should GCPRO all the elements of ARGS. */
ptrdiff_t numargs = nargs - 1;
Lisp_Object lisp_numargs;
Lisp_Object val;
- register Lisp_Object *internal_args;
- ptrdiff_t i;
+ Lisp_Object *internal_args;
+ ptrdiff_t count;
QUIT;
}
/* This also GCPROs them. */
- record_in_backtrace (args[0], &args[1], nargs - 1);
+ count = record_in_backtrace (args[0], &args[1], nargs - 1);
/* Call GC after setting up the backtrace, so the latter GCPROs the args. */
maybe_gc ();
if (debug_on_next_call)
- do_debug_on_call (Qlambda);
+ do_debug_on_call (Qlambda, count);
check_cons_list ();
val = (XSUBR (fun)->function.aMANY) (numargs, args + 1);
else
{
+ Lisp_Object internal_argbuf[8];
if (XSUBR (fun)->max_args > numargs)
{
- internal_args = alloca (XSUBR (fun)->max_args
- * sizeof *internal_args);
+ eassert (XSUBR (fun)->max_args <= ARRAYELTS (internal_argbuf));
+ internal_args = internal_argbuf;
memcpy (internal_args, args + 1, numargs * word_size);
- for (i = numargs; i < XSUBR (fun)->max_args; i++)
- internal_args[i] = Qnil;
+ memclear (internal_args + numargs,
+ (XSUBR (fun)->max_args - numargs) * word_size);
}
else
internal_args = args + 1;
}
check_cons_list ();
lisp_eval_depth--;
- if (backtrace_debug_on_exit (specpdl_ptr - 1))
+ if (backtrace_debug_on_exit (specpdl + count))
val = call_debugger (list2 (Qexit, val));
specpdl_ptr--;
return val;
}
\f
static Lisp_Object
-apply_lambda (Lisp_Object fun, Lisp_Object args)
+apply_lambda (Lisp_Object fun, Lisp_Object args, ptrdiff_t count)
{
Lisp_Object args_left;
ptrdiff_t i;
UNGCPRO;
- set_backtrace_args (specpdl_ptr - 1, arg_vector);
- set_backtrace_nargs (specpdl_ptr - 1, i);
+ set_backtrace_args (specpdl + count, arg_vector, i);
tem = funcall_lambda (fun, numargs, arg_vector);
/* Do the debug-on-exit now, while arg_vector still exists. */
- if (backtrace_debug_on_exit (specpdl_ptr - 1))
+ if (backtrace_debug_on_exit (specpdl + count))
{
/* Don't do it again when we return to eval. */
- set_backtrace_debug_on_exit (specpdl_ptr - 1, false);
+ set_backtrace_debug_on_exit (specpdl + count, false);
tem = call_debugger (list2 (Qexit, tem));
}
SAFE_FREE ();
for (; distance > 0; distance--)
{
tmp += step;
- /* */
switch (tmp->kind)
{
/* FIXME: Ideally we'd like to "temporarily unwind" (some of) those
unwind_protect, but the problem is that we don't know how to
rewind them afterwards. */
case SPECPDL_UNWIND:
+ {
+ Lisp_Object oldarg = tmp->unwind.arg;
+ if (tmp->unwind.func == set_buffer_if_live)
+ tmp->unwind.arg = Fcurrent_buffer ();
+ else if (tmp->unwind.func == save_excursion_restore)
+ tmp->unwind.arg = save_excursion_save ();
+ else
+ break;
+ tmp->unwind.func (oldarg);
+ break;
+ }
+
case SPECPDL_UNWIND_PTR:
case SPECPDL_UNWIND_INT:
case SPECPDL_UNWIND_VOID:
DEFSYM (Qand_rest, "&rest");
DEFSYM (Qand_optional, "&optional");
DEFSYM (Qclosure, "closure");
+ DEFSYM (QCdocumentation, ":documentation");
DEFSYM (Qdebug, "debug");
DEFVAR_LISP ("inhibit-debugger", Vinhibit_debugger,
(Just imagine if someone makes it buffer-local). */
Funintern (Qinternal_interpreter_environment, Qnil);
- DEFSYM (Vrun_hooks, "run-hooks");
+ Vrun_hooks = intern_c_string ("run-hooks");
+ staticpro (&Vrun_hooks);
staticpro (&Vautoload_queue);
Vautoload_queue = Qnil;