#include "xterm.h"
#endif
-/* This definition is duplicated in alloc.c and keyboard.c. */
-/* Putting it in lisp.h makes cc bomb out! */
-
struct backtrace
{
struct backtrace *next;
Lisp_Object *function;
Lisp_Object *args; /* Points to vector of args. */
-#define NARGS_BITS (BITS_PER_INT - 2)
- /* Let's not use size_t because we want to allow negative values (for
- UNEVALLED). Also let's steal 2 bits so we save a word (or more for
- alignment). In any case I doubt Emacs would survive a function call with
- more than 500M arguments. */
- int nargs : NARGS_BITS; /* Length of vector.
- If nargs is UNEVALLED, args points
- to slot holding list of unevalled args. */
- char evalargs : 1;
+ ptrdiff_t nargs; /* Length of vector. */
/* Nonzero means call value of debugger when done with this operation. */
- char debug_on_exit : 1;
+ unsigned int debug_on_exit : 1;
};
static struct backtrace *backtrace_list;
void
init_eval_once (void)
{
- specpdl_size = 50;
- specpdl = (struct specbinding *) xmalloc (specpdl_size * sizeof (struct specbinding));
+ enum { size = 50 };
+ specpdl = (struct specbinding *) xmalloc (size * sizeof (struct specbinding));
+ specpdl_size = size;
specpdl_ptr = specpdl;
/* Don't forget to update docs (lispref node "Local Variables"). */
max_specpdl_size = 1300; /* 1000 is not enough for CEDET's c-by.el. */
if (lisp_eval_depth + 40 > max_lisp_eval_depth)
max_lisp_eval_depth = lisp_eval_depth + 40;
- if (SPECPDL_INDEX () + 100 > max_specpdl_size)
+ if (max_specpdl_size - 100 < SPECPDL_INDEX ())
max_specpdl_size = SPECPDL_INDEX () + 100;
#ifdef HAVE_WINDOW_SYSTEM
}
sym->declared_special = 1;
+ XSYMBOL (base_variable)->declared_special = 1;
sym->redirect = SYMBOL_VARALIAS;
SET_SYMBOL_ALIAS (sym, XSYMBOL (base_variable));
sym->constant = SYMBOL_CONSTANT_P (base_variable);
if CONDITION-NAME is one of the error's condition names.
If an error happens, the first applicable handler is run.
-The car of a handler may be a list of condition names
-instead of a single condition name. Then it handles all of them.
+The car of a handler may be a list of condition names instead of a
+single condition name; then it handles all of them. If the special
+condition name `debug' is present in this list, it allows another
+condition in the list to run the debugger if `debug-on-error' and the
+other usual mechanisms says it should (otherwise, `condition-case'
+suppresses the debugger).
When a handler handles an error, control returns to the `condition-case'
and it executes the handler's BODY...
struct catchtag c;
struct handler h;
- /* Since Fsignal will close off all calls to x_catch_errors,
- we will get the wrong results if some are not closed now. */
-#if HAVE_X_WINDOWS
- if (x_catching_errors ())
- abort ();
-#endif
-
c.tag = Qnil;
c.val = Qnil;
c.backlist = backtrace_list;
struct catchtag c;
struct handler h;
- /* Since Fsignal will close off all calls to x_catch_errors,
- we will get the wrong results if some are not closed now. */
-#if HAVE_X_WINDOWS
- if (x_catching_errors ())
- abort ();
-#endif
-
c.tag = Qnil;
c.val = Qnil;
c.backlist = backtrace_list;
struct catchtag c;
struct handler h;
- /* Since Fsignal will close off all calls to x_catch_errors,
- we will get the wrong results if some are not closed now. */
-#if HAVE_X_WINDOWS
- if (x_catching_errors ())
- abort ();
-#endif
-
c.tag = Qnil;
c.val = Qnil;
c.backlist = backtrace_list;
struct catchtag c;
struct handler h;
- /* Since Fsignal will close off all calls to x_catch_errors,
- we will get the wrong results if some are not closed now. */
-#if HAVE_X_WINDOWS
- if (x_catching_errors ())
- abort ();
-#endif
-
c.tag = Qnil;
c.val = Qnil;
c.backlist = backtrace_list;
}
\f
-static Lisp_Object find_handler_clause (Lisp_Object, Lisp_Object,
- Lisp_Object, Lisp_Object);
+static Lisp_Object find_handler_clause (Lisp_Object, Lisp_Object);
static int maybe_call_debugger (Lisp_Object conditions, Lisp_Object sig,
Lisp_Object data);
for (h = handlerlist; h; h = h->next)
{
- clause = find_handler_clause (h->handler, conditions,
- error_symbol, data);
+ clause = find_handler_clause (h->handler, conditions);
if (!NILP (clause))
break;
}
&& (!NILP (Vdebug_on_signal)
/* If no handler is present now, try to run the debugger. */
|| NILP (clause)
+ /* A `debug' symbol in the handler list disables the normal
+ suppression of the debugger. */
+ || (CONSP (clause) && CONSP (XCAR (clause))
+ && !NILP (Fmemq (Qdebug, XCAR (clause))))
/* Special handler that means "print a message and run debugger
if requested". */
|| EQ (h->handler, Qerror)))
}
/* Call the debugger if calling it is currently enabled for CONDITIONS.
- SIG and DATA describe the signal, as in find_handler_clause. */
-
+ SIG and DATA describe the signal. There are two ways to pass them:
+ = SIG is the error symbol, and DATA is the rest of the data.
+ = SIG is nil, and DATA is (SYMBOL . REST-OF-DATA).
+ This is for memory-full errors only. */
static int
maybe_call_debugger (Lisp_Object conditions, Lisp_Object sig, Lisp_Object data)
{
return 0;
}
-/* Value of Qlambda means we have called debugger and user has continued.
- There are two ways to pass SIG and DATA:
- = SIG is the error symbol, and DATA is the rest of the data.
- = SIG is nil, and DATA is (SYMBOL . REST-OF-DATA).
- This is for memory-full errors only.
-
- We need to increase max_specpdl_size temporarily around
- anything we do that can push on the specpdl, so as not to get
- a second error here in case we're handling specpdl overflow. */
-
static Lisp_Object
-find_handler_clause (Lisp_Object handlers, Lisp_Object conditions,
- Lisp_Object sig, Lisp_Object data)
+find_handler_clause (Lisp_Object handlers, Lisp_Object conditions)
{
register Lisp_Object h;
verror (const char *m, va_list ap)
{
char buf[4000];
- size_t size = sizeof buf;
- size_t size_max = STRING_BYTES_BOUND + 1;
- size_t mlen = strlen (m);
+ ptrdiff_t size = sizeof buf;
+ ptrdiff_t size_max = STRING_BYTES_BOUND + 1;
+ char const *m_end = m + strlen (m);
char *buffer = buf;
- size_t used;
+ ptrdiff_t used;
Lisp_Object string;
while (1)
{
va_list ap_copy;
va_copy (ap_copy, ap);
- used = doprnt (buffer, size, m, m + mlen, ap_copy);
+ used = doprnt (buffer, size, m, m_end, ap_copy);
va_end (ap_copy);
/* Note: the -1 below is because `doprnt' returns the number of bytes
backtrace.function = &original_fun; /* This also protects them from gc. */
backtrace.args = &original_args;
backtrace.nargs = UNEVALLED;
- backtrace.evalargs = 1;
backtrace.debug_on_exit = 0;
if (debug_on_next_call)
xsignal2 (Qwrong_number_of_arguments, original_fun, numargs);
else if (XSUBR (fun)->max_args == UNEVALLED)
- {
- backtrace.evalargs = 0;
- val = (XSUBR (fun)->function.aUNEVALLED) (args_left);
- }
+ val = (XSUBR (fun)->function.aUNEVALLED) (args_left);
else if (XSUBR (fun)->max_args == MANY)
{
/* Pass a vector of evaluated arguments. */
backtrace.function = &args[0];
backtrace.args = &args[1];
backtrace.nargs = nargs - 1;
- backtrace.evalargs = 0;
backtrace.debug_on_exit = 0;
if (debug_on_next_call)
backtrace_list->args = arg_vector;
backtrace_list->nargs = i;
- backtrace_list->evalargs = 0;
tem = funcall_lambda (fun, numargs, arg_vector);
/* Do the debug-on-exit now, while arg_vector still exists. */
shouldn't bind any arguments, instead just call the byte-code
interpreter directly; it will push arguments as necessary.
- Byte-code objects with either a non-existant, or a nil value for
+ Byte-code objects with either a non-existent, or a nil value for
the `push args' slot (the default), have dynamically-bound
arguments, and use the argument-binding code below instead (as do
all interpreted functions, even lexically bound ones). */
grow_specpdl (void)
{
register int count = SPECPDL_INDEX ();
- if (specpdl_size >= max_specpdl_size)
+ int max_size =
+ min (max_specpdl_size,
+ min (max (PTRDIFF_MAX, SIZE_MAX) / sizeof (struct specbinding),
+ INT_MAX));
+ int size;
+ if (max_size <= specpdl_size)
{
if (max_specpdl_size < 400)
- max_specpdl_size = 400;
- if (specpdl_size >= max_specpdl_size)
+ max_size = max_specpdl_size = 400;
+ if (max_size <= specpdl_size)
signal_error ("Variable binding depth exceeds max-specpdl-size", Qnil);
}
- specpdl_size *= 2;
- if (specpdl_size > max_specpdl_size)
- specpdl_size = max_specpdl_size;
- specpdl = (struct specbinding *) xrealloc (specpdl, specpdl_size * sizeof (struct specbinding));
+ size = specpdl_size < max_size / 2 ? 2 * specpdl_size : max_size;
+ specpdl = xnrealloc (specpdl, size, sizeof *specpdl);
+ specpdl_size = size;
specpdl_ptr = specpdl + count;
}
before making `inhibit-quit' nil. */);
Vinhibit_quit = Qnil;
- Qinhibit_quit = intern_c_string ("inhibit-quit");
- staticpro (&Qinhibit_quit);
-
- Qautoload = intern_c_string ("autoload");
- staticpro (&Qautoload);
-
- Qdebug_on_error = intern_c_string ("debug-on-error");
- staticpro (&Qdebug_on_error);
-
- Qmacro = intern_c_string ("macro");
- staticpro (&Qmacro);
-
- Qdeclare = intern_c_string ("declare");
- staticpro (&Qdeclare);
+ DEFSYM (Qinhibit_quit, "inhibit-quit");
+ DEFSYM (Qautoload, "autoload");
+ DEFSYM (Qdebug_on_error, "debug-on-error");
+ DEFSYM (Qmacro, "macro");
+ DEFSYM (Qdeclare, "declare");
/* Note that the process handling also uses Qexit, but we don't want
to staticpro it twice, so we just do it here. */
- Qexit = intern_c_string ("exit");
- staticpro (&Qexit);
-
- Qinteractive = intern_c_string ("interactive");
- staticpro (&Qinteractive);
-
- Qcommandp = intern_c_string ("commandp");
- staticpro (&Qcommandp);
-
- Qdefun = intern_c_string ("defun");
- staticpro (&Qdefun);
-
- Qand_rest = intern_c_string ("&rest");
- staticpro (&Qand_rest);
-
- Qand_optional = intern_c_string ("&optional");
- staticpro (&Qand_optional);
-
- Qclosure = intern_c_string ("closure");
- staticpro (&Qclosure);
+ DEFSYM (Qexit, "exit");
- Qdebug = intern_c_string ("debug");
- staticpro (&Qdebug);
+ DEFSYM (Qinteractive, "interactive");
+ DEFSYM (Qcommandp, "commandp");
+ DEFSYM (Qdefun, "defun");
+ DEFSYM (Qand_rest, "&rest");
+ DEFSYM (Qand_optional, "&optional");
+ DEFSYM (Qclosure, "closure");
+ DEFSYM (Qdebug, "debug");
DEFVAR_LISP ("debug-on-error", Vdebug_on_error,
doc: /* *Non-nil means enter debugger if an error is signaled.
Every element of this list can be either a cons (VAR . VAL)
specifying a lexical binding, or a single symbol VAR indicating
that this variable should use dynamic scoping. */
- Qinternal_interpreter_environment
- = intern_c_string ("internal-interpreter-environment");
- staticpro (&Qinternal_interpreter_environment);
+ DEFSYM (Qinternal_interpreter_environment, "internal-interpreter-environment");
DEFVAR_LISP ("internal-interpreter-environment",
Vinternal_interpreter_environment,
doc: /* If non-nil, the current lexical environment of the lisp interpreter.
(Just imagine if someone makes it buffer-local). */
Funintern (Qinternal_interpreter_environment, Qnil);
- Vrun_hooks = intern_c_string ("run-hooks");
- staticpro (&Vrun_hooks);
+ DEFSYM (Vrun_hooks, "run-hooks");
staticpro (&Vautoload_queue);
Vautoload_queue = Qnil;
HCoop / bpt / emacs.git / blobdiff