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/* -*- mode: c; c-basic-offset: 8 -*- */
/*
error.c -- Error handling.
*/
/*
Copyright (c) 1984, Taiichi Yuasa and Masami Hagiya.
Copyright (c) 1990, Giuseppe Attardi.
Copyright (c) 2001, Juan Jose Garcia Ripoll.
ECL is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
See file '../Copyright' for full details.
*/
#include <ecl/ecl.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <signal.h>
#include <stdlib.h>
#if defined(ECL_MS_WINDOWS_HOST) || defined(cygwin)
# include <windows.h>
#endif
#include <ecl/internal.h>
#include <ecl/ecl-inl.h>
static cl_object
cl_symbol_or_object(cl_object x)
{
if (ECL_FIXNUMP(x))
return (cl_object)(cl_symbols + ecl_fixnum(x));
return x;
}
void
_ecl_unexpected_return()
{
ecl_internal_error(
"*** \n"
"*** A call to ERROR returned without handling the error.\n"
"*** This should have never happened and is usually a signal\n"
"*** that the debugger or the universal error handler were\n"
"*** improperly coded or altered. Please contact the maintainers\n"
"***\n");
}
void
ecl_internal_error(const char *s)
{
int saved_errno = errno;
fprintf(stderr, "\nInternal or unrecoverable error in:\n%s\n", s);
if (saved_errno) {
fprintf(stderr, " [%d: %s]\n", saved_errno,
strerror(saved_errno));
}
fflush(stderr);
si_dump_c_backtrace(ecl_make_fixnum(32));
#ifdef SIGIOT
signal(SIGIOT, SIG_DFL); /* avoid getting into a loop with abort */
#endif
abort();
}
void
ecl_unrecoverable_error(cl_env_ptr the_env, const char *message)
{
/*
* Right now we have no means of specifying a jump point
* for really bad events. We just jump to the outermost
* frame, which is equivalent to quitting, and wait for
* someone to intercept this jump.
*/
ecl_frame_ptr destination;
cl_object tag;
/*
* We output the error message with very low level routines
* because we can not risk another stack overflow.
*/
writestr_stream(message, cl_core.error_output);
tag = ECL_SYM_VAL(the_env, @'si::*quit-tag*');
the_env->nvalues = 0;
if (tag) {
destination = frs_sch(tag);
if (destination) {
ecl_unwind(the_env, destination);
}
}
if (the_env->frs_org <= the_env->frs_top) {
destination = ecl_process_env()->frs_org;
ecl_unwind(the_env, destination);
} else {
ecl_internal_error("\n;;;\n;;; No frame to jump to\n;;; Aborting ECL\n;;;");
}
}
/*****************************************************************************/
/* Support for Lisp Error Handler */
/*****************************************************************************/
void
FEerror(const char *s, int narg, ...)
{
ecl_va_list args;
ecl_va_start(args, narg, narg, 0);
ecl_enable_interrupts();
funcall(4, @'si::universal-error-handler',
ECL_NIL, /* not correctable */
make_constant_base_string(s), /* condition text */
cl_grab_rest_args(args));
_ecl_unexpected_return();
}
cl_object
CEerror(cl_object c, const char *err, int narg, ...)
{
ecl_va_list args;
ecl_va_start(args, narg, narg, 0);
ecl_enable_interrupts();
return funcall(4, @'si::universal-error-handler',
c, /* correctable */
make_constant_base_string(err), /* continue-format-string */
cl_grab_rest_args(args));
}
/***********************
* Conditions signaler *
***********************/
void
FEprogram_error(const char *s, int narg, ...)
{
cl_object real_args, text;
ecl_va_list args;
ecl_va_start(args, narg, narg, 0);
text = make_constant_base_string(s);
real_args = cl_grab_rest_args(args);
if (cl_boundp(@'si::*current-form*') != ECL_NIL) {
/* When FEprogram_error is invoked from the compiler, we can
* provide information about the offending form.
*/
cl_object stmt = ecl_symbol_value(@'si::*current-form*');
if (stmt != ECL_NIL) {
real_args = @list(3, stmt, text, real_args);
text = make_constant_base_string("In form~%~S~%~?");
}
}
si_signal_simple_error(4,
@'program-error', /* condition name */
ECL_NIL, /* not correctable */
text,
real_args);
}
void
FEprogram_error_noreturn(const char *s, int narg, ...)
{
cl_object real_args, text;
ecl_va_list args;
ecl_va_start(args, narg, narg, 0);
text = make_constant_base_string(s);
real_args = cl_grab_rest_args(args);
if (cl_boundp(@'si::*current-form*') != ECL_NIL) {
/* When FEprogram_error is invoked from the compiler, we can
* provide information about the offending form.
*/
cl_object stmt = ecl_symbol_value(@'si::*current-form*');
if (stmt != ECL_NIL) {
real_args = @list(3, stmt, text, real_args);
text = make_constant_base_string("In form~%~S~%~?");
}
}
si_signal_simple_error(4,
@'program-error', /* condition name */
ECL_NIL, /* not correctable */
text,
real_args);
}
void
FEcontrol_error(const char *s, int narg, ...)
{
ecl_va_list args;
ecl_va_start(args, narg, narg, 0);
si_signal_simple_error(4,
@'control-error', /* condition name */
ECL_NIL, /* not correctable */
make_constant_base_string(s), /* format control */
cl_grab_rest_args(args)); /* format args */
}
void
FEreader_error(const char *s, cl_object stream, int narg, ...)
{
cl_object message = make_constant_base_string(s);
cl_object args_list;
ecl_va_list args;
ecl_va_start(args, narg, narg, 0);
args_list = cl_grab_rest_args(args);
if (Null(stream)) {
/* Parser error */
si_signal_simple_error(4,
@'parse-error', /* condition name */
ECL_NIL, /* not correctable */
message, /* format control */
args_list);
} else {
/* Actual reader error */
cl_object prefix = make_constant_base_string("Reader error in file ~S, "
"position ~D:~%");
cl_object position = cl_file_position(1, stream);
message = si_base_string_concatenate(2, prefix, message);
args_list = cl_listX(3, stream, position, args_list);
si_signal_simple_error(6,
@'reader-error', /* condition name */
ECL_NIL, /* not correctable */
message, /* format control */
args_list, /* format args */
@':stream', stream);
}
}
void
FEcannot_open(cl_object fn)
{
cl_error(3, @'file-error', @':pathname', fn);
}
void
FEend_of_file(cl_object strm)
{
cl_error(3, @'end-of-file', @':stream', strm);
}
void
FEclosed_stream(cl_object strm)
{
cl_error(3, @'stream-error', @':stream', strm);
}
cl_object
si_signal_type_error(cl_object value, cl_object type)
{
return cl_error(5, @'type-error', @':expected-type', type,
@':datum', value);
}
void
FEwrong_type_argument(cl_object type, cl_object value)
{
si_signal_type_error(value, cl_symbol_or_object(type));
}
void
FEwrong_type_only_arg(cl_object function, cl_object value, cl_object type)
{
const char *message =
"In ~:[an anonymous function~;~:*function ~A~], "
"the value of the only argument is~& ~S~&which is "
"not of the expected type ~A";
cl_env_ptr env = ecl_process_env();
struct ecl_ihs_frame tmp_ihs;
function = cl_symbol_or_object(function);
type = cl_symbol_or_object(type);
if (!Null(function) && env->ihs_top && env->ihs_top->function != function) {
ecl_ihs_push(env,&tmp_ihs,function,ECL_NIL);
}
si_signal_simple_error(8,
@'type-error', /* condition name */
ECL_NIL, /* not correctable */
make_constant_base_string(message), /* format control */
cl_list(3, function, value, type),
@':expected-type', type,
@':datum', value);
}
void
FEwrong_type_nth_arg(cl_object function, cl_narg narg, cl_object value, cl_object type)
{
const char *message =
"In ~:[an anonymous function~;~:*function ~A~], "
"the value of the ~:R argument is~& ~S~&which is "
"not of the expected type ~A";
cl_env_ptr env = ecl_process_env();
struct ecl_ihs_frame tmp_ihs;
function = cl_symbol_or_object(function);
type = cl_symbol_or_object(type);
if (!Null(function) && env->ihs_top && env->ihs_top->function != function) {
ecl_ihs_push(env,&tmp_ihs,function,ECL_NIL);
}
si_signal_simple_error(8,
@'type-error', /* condition name */
ECL_NIL, /* not correctable */
make_constant_base_string(message), /* format control */
cl_list(4, function, ecl_make_fixnum(narg),
value, type),
@':expected-type', type,
@':datum', value);
}
void
FEwrong_type_key_arg(cl_object function, cl_object key, cl_object value, cl_object type)
{
const char *message =
"In ~:[an anonymous function~;~:*function ~A~], "
"the value of the argument ~S is~& ~S~&which is "
"not of the expected type ~A";
cl_env_ptr env = ecl_process_env();
struct ecl_ihs_frame tmp_ihs;
function = cl_symbol_or_object(function);
type = cl_symbol_or_object(type);
key = cl_symbol_or_object(key);
if (!Null(function) && env->ihs_top && env->ihs_top->function != function) {
ecl_ihs_push(env,&tmp_ihs,function,ECL_NIL);
}
si_signal_simple_error(8,
@'type-error', /* condition name */
ECL_NIL, /* not correctable */
make_constant_base_string(message), /* format control */
cl_list(4, function, key, value, type),
@':expected-type', type,
@':datum', value);
}
void
FEwrong_index(cl_object function, cl_object a, int which, cl_object ndx,
cl_index nonincl_limit)
{
const char *message1 =
"In ~:[an anonymous function~;~:*function ~A~], "
"the ~*index into the object~% ~A.~%"
"takes a value ~D out of the range ~A.";
const char *message2 =
"In ~:[an anonymous function~;~:*function ~A~], "
"the ~:R index into the object~% ~A~%"
"takes a value ~D out of the range ~A.";
cl_object limit = ecl_make_integer(nonincl_limit-1);
cl_object type = ecl_make_integer_type(ecl_make_fixnum(0), limit);
cl_object message = make_constant_base_string((which<0) ? message1 : message2);
cl_env_ptr env = ecl_process_env();
struct ecl_ihs_frame tmp_ihs;
function = cl_symbol_or_object(function);
if (!Null(function) && env->ihs_top && env->ihs_top->function != function) {
ecl_ihs_push(env,&tmp_ihs,function,ECL_NIL);
}
cl_error(9,
@'simple-type-error', /* condition name */
@':format-control', message,
@':format-arguments',
cl_list(5, function, ecl_make_fixnum(which+1), a, ndx, type),
@':expected-type', type,
@':datum', ndx);
}
void
FEunbound_variable(cl_object sym)
{
cl_print(1, sym);
cl_error(3, @'unbound-variable', @':name', sym);
}
void
FEundefined_function(cl_object fname)
{
cl_print(1, fname);
cl_error(3, @'undefined-function', @':name', fname);
}
void
FEprint_not_readable(cl_object x)
{
cl_error(3, @'print-not-readable', @':object', x);
}
/*************
* Shortcuts *
*************/
void
FEwrong_num_arguments(cl_object fun)
{
fun = cl_symbol_or_object(fun);
FEprogram_error("Wrong number of arguments passed to function ~S.",
1, fun);
}
void
FEwrong_num_arguments_anonym(void)
{
FEprogram_error("Wrong number of arguments passed to an anonymous function", 0);
}
void
FEinvalid_macro_call(cl_object name)
{
FEerror("Invalid macro call to ~S.", 1, name);
}
void
FEinvalid_variable(const char *s, cl_object obj)
{
FEerror(s, 1, obj);
}
void
FEassignment_to_constant(cl_object v)
{
FEprogram_error("SETQ: Tried to assign a value to the constant ~S.", 1, v);
}
void
FEinvalid_function(cl_object obj)
{
FEwrong_type_argument(@'function', obj);
}
void
FEinvalid_function_name(cl_object fname)
{
cl_error(9, @'simple-type-error', @':format-control',
make_constant_base_string("Not a valid function name ~D"),
@':format-arguments', cl_list(1, fname),
@':expected-type', cl_list(2, @'satisfies', @'si::valid-function-name-p'),
@':datum', fname);
}
/* bootstrap version */
static int recursive_error = 0;
static cl_object
universal_error_handler(cl_object continue_string, cl_object datum,
cl_object args)
{
const cl_env_ptr the_env = ecl_process_env();
cl_object stream;
if (recursive_error)
goto ABORT;
recursive_error = 1;
stream = cl_core.error_output;
if (!Null(stream)) {
ecl_bds_bind(the_env, @'*print-readably*', ECL_NIL);
ecl_bds_bind(the_env, @'*print-level*', ecl_make_fixnum(3));
ecl_bds_bind(the_env, @'*print-length*', ecl_make_fixnum(3));
ecl_bds_bind(the_env, @'*print-circle*', ECL_NIL);
ecl_bds_bind(the_env, @'*print-base*', ecl_make_fixnum(10));
writestr_stream("\n;;; Unhandled lisp initialization error",
stream);
writestr_stream("\n;;; Message:\n", stream);
si_write_ugly_object(datum, stream);
writestr_stream("\n;;; Arguments:\n", stream);
si_write_ugly_object(datum, args);
ecl_bds_unwind_n(the_env, 5);
}
ABORT:
ecl_internal_error("\nLisp initialization error.\n");
}
void
FEdivision_by_zero(cl_object x, cl_object y)
{
cl_error(5, @'division-by-zero', @':operation', @'/',
@':operands', cl_list(2, x, y));
}
cl_object
_ecl_strerror(int code)
{
const char *error = strerror(code);
return make_base_string_copy(error);
}
/*************************************
* Errors generated by the C library *
*************************************/
/*
* Interprets an error code from the C library according to the POSIX
* standard, and produces a suitable error message by combining the user
* supplied format with an explanation of the cause of the error.
*/
void
FElibc_error(const char *msg, int narg, ...)
{
ecl_va_list args;
cl_object rest, error = _ecl_strerror(errno);
ecl_va_start(args, narg, narg, 0);
rest = cl_grab_rest_args(args);
FEerror("~?~%C library explanation: ~A.", 3,
make_constant_base_string(msg), rest,
error);
}
#if defined(ECL_MS_WINDOWS_HOST) || defined(cygwin)
ecl_def_ct_base_string(unknown_error,"[Unable to get error message]",28,static,const);
void
FEwin32_error(const char *msg, int narg, ...)
{
ecl_va_list args;
cl_object rest, win_msg_obj;
char *win_msg;
if (FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_ALLOCATE_BUFFER,
0, GetLastError(), 0, (void*)&win_msg, 0, NULL) == 0)
win_msg_obj = unknown_error;
else {
win_msg_obj = make_base_string_copy(win_msg);
LocalFree(win_msg);
}
ecl_va_start(args, narg, narg, 0);
rest = cl_grab_rest_args(args);
FEerror("~?~%Windows library explanation: ~A.", 3,
make_constant_base_string(msg), rest,
win_msg_obj);
}
#endif
/************************************
* Higher level interface to errors *
************************************/
@(defun error (eformat &rest args)
@
ecl_enable_interrupts();
funcall(4, @'si::universal-error-handler', ECL_NIL, eformat,
cl_grab_rest_args(args));
_ecl_unexpected_return();
@(return);
@)
@(defun cerror (cformat eformat &rest args)
@
ecl_enable_interrupts();
return funcall(4, @'si::universal-error-handler', cformat, eformat,
cl_grab_rest_args(args));
@)
void
init_error(void)
{
ecl_def_c_function(@'si::universal-error-handler',
(cl_objectfn_fixed)universal_error_handler,
3);
}