361 lines
14 KiB
C
361 lines
14 KiB
C
/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013, 2014 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <string.h>
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#include <stdarg.h>
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#include <assert.h>
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#include "mpconfig.h"
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#include "nlr.h"
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#include "misc.h"
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#include "qstr.h"
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#include "obj.h"
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#include "objtuple.h"
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#include "objtype.h"
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#include "runtime.h"
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#include "runtime0.h"
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typedef struct _mp_obj_exception_t {
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mp_obj_base_t base;
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mp_obj_t traceback; // a list object, holding (file,line,block) as numbers (not Python objects); a hack for now
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mp_obj_tuple_t *args;
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} mp_obj_exception_t;
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// Instance of MemoryError exception - needed by mp_malloc_fail
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const mp_obj_exception_t mp_const_MemoryError_obj = {{&mp_type_MemoryError}, MP_OBJ_NULL, mp_const_empty_tuple};
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// Local non-heap memory for allocating an exception when we run out of RAM
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STATIC mp_obj_exception_t mp_emergency_exception_obj;
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// Instance of GeneratorExit exception - needed by generator.close()
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// This would belong to objgenerator.c, but to keep mp_obj_exception_t
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// definition module-private so far, have it here.
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const mp_obj_exception_t mp_const_GeneratorExit_obj = {{&mp_type_GeneratorExit}, MP_OBJ_NULL, mp_const_empty_tuple};
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STATIC void mp_obj_exception_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t o_in, mp_print_kind_t kind) {
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mp_obj_exception_t *o = o_in;
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mp_print_kind_t k = kind & ~PRINT_EXC_SUBCLASS;
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bool is_subclass = kind & PRINT_EXC_SUBCLASS;
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if (!is_subclass && (k == PRINT_REPR || k == PRINT_EXC)) {
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print(env, "%s", qstr_str(o->base.type->name));
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}
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if (k == PRINT_EXC) {
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print(env, ": ");
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}
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if (k == PRINT_STR || k == PRINT_EXC) {
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if (o->args == NULL || o->args->len == 0) {
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print(env, "");
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return;
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} else if (o->args->len == 1) {
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mp_obj_print_helper(print, env, o->args->items[0], PRINT_STR);
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return;
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}
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}
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mp_obj_tuple_print(print, env, o->args, kind);
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}
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mp_obj_t mp_obj_exception_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp_obj_t *args) {
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mp_obj_type_t *type = type_in;
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if (n_kw != 0) {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "%s does not take keyword arguments", mp_obj_get_type_str(type_in)));
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}
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mp_obj_exception_t *o = m_new_obj_var_maybe(mp_obj_exception_t, mp_obj_t, 0);
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if (o == NULL) {
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// Couldn't allocate heap memory; use local data instead.
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o = &mp_emergency_exception_obj;
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// We can't store any args.
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n_args = 0;
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o->args = mp_const_empty_tuple;
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} else {
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o->args = mp_obj_new_tuple(n_args, args);
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}
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o->base.type = type;
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o->traceback = MP_OBJ_NULL;
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return o;
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}
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// Get exception "value" - that is, first argument, or None
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mp_obj_t mp_obj_exception_get_value(mp_obj_t self_in) {
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mp_obj_exception_t *self = self_in;
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if (self->args->len == 0) {
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return mp_const_none;
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} else {
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return self->args->items[0];
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}
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}
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STATIC void exception_load_attr(mp_obj_t self_in, qstr attr, mp_obj_t *dest) {
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mp_obj_exception_t *self = self_in;
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if (attr == MP_QSTR_args) {
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dest[0] = self->args;
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} else if (self->base.type == &mp_type_StopIteration && attr == MP_QSTR_value) {
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dest[0] = mp_obj_exception_get_value(self);
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}
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}
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STATIC mp_obj_t exc___init__(uint n_args, const mp_obj_t *args) {
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mp_obj_exception_t *self = args[0];
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mp_obj_t argst = mp_obj_new_tuple(n_args - 1, args + 1);
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self->args = argst;
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(exc___init___obj, 1, MP_OBJ_FUN_ARGS_MAX, exc___init__);
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STATIC const mp_map_elem_t exc_locals_dict_table[] = {
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{ MP_OBJ_NEW_QSTR(MP_QSTR___init__), (mp_obj_t)&exc___init___obj },
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};
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STATIC MP_DEFINE_CONST_DICT(exc_locals_dict, exc_locals_dict_table);
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const mp_obj_type_t mp_type_BaseException = {
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{ &mp_type_type },
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.name = MP_QSTR_BaseException,
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.print = mp_obj_exception_print,
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.make_new = mp_obj_exception_make_new,
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.load_attr = exception_load_attr,
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.locals_dict = (mp_obj_t)&exc_locals_dict,
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};
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#define MP_DEFINE_EXCEPTION_BASE(base_name) \
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STATIC const mp_obj_tuple_t mp_type_ ## base_name ## _base_tuple = {{&mp_type_tuple}, 1, {(mp_obj_t)&mp_type_ ## base_name}};\
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#define MP_DEFINE_EXCEPTION(exc_name, base_name) \
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const mp_obj_type_t mp_type_ ## exc_name = { \
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{ &mp_type_type }, \
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.name = MP_QSTR_ ## exc_name, \
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.print = mp_obj_exception_print, \
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.make_new = mp_obj_exception_make_new, \
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.load_attr = exception_load_attr, \
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.bases_tuple = (mp_obj_t)&mp_type_ ## base_name ## _base_tuple, \
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};
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// List of all exceptions, arranged as in the table at:
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// http://docs.python.org/3.3/library/exceptions.html
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MP_DEFINE_EXCEPTION_BASE(BaseException)
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MP_DEFINE_EXCEPTION(SystemExit, BaseException)
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//MP_DEFINE_EXCEPTION(KeyboardInterrupt, BaseException)
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MP_DEFINE_EXCEPTION(GeneratorExit, BaseException)
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MP_DEFINE_EXCEPTION(Exception, BaseException)
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MP_DEFINE_EXCEPTION_BASE(Exception)
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MP_DEFINE_EXCEPTION(StopIteration, Exception)
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MP_DEFINE_EXCEPTION(ArithmeticError, Exception)
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MP_DEFINE_EXCEPTION_BASE(ArithmeticError)
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//MP_DEFINE_EXCEPTION(FloatingPointError, ArithmeticError)
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MP_DEFINE_EXCEPTION(OverflowError, ArithmeticError)
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MP_DEFINE_EXCEPTION(ZeroDivisionError, ArithmeticError)
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MP_DEFINE_EXCEPTION(AssertionError, Exception)
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MP_DEFINE_EXCEPTION(AttributeError, Exception)
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//MP_DEFINE_EXCEPTION(BufferError, Exception)
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//MP_DEFINE_EXCEPTION(EnvironmentError, Exception)
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MP_DEFINE_EXCEPTION(EOFError, Exception)
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MP_DEFINE_EXCEPTION(ImportError, Exception)
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MP_DEFINE_EXCEPTION(IOError, Exception)
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MP_DEFINE_EXCEPTION(LookupError, Exception)
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MP_DEFINE_EXCEPTION_BASE(LookupError)
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MP_DEFINE_EXCEPTION(IndexError, LookupError)
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MP_DEFINE_EXCEPTION(KeyError, LookupError)
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MP_DEFINE_EXCEPTION(MemoryError, Exception)
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MP_DEFINE_EXCEPTION(NameError, Exception)
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/*
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MP_DEFINE_EXCEPTION_BASE(NameError)
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MP_DEFINE_EXCEPTION(UnboundLocalError, NameError)
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*/
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MP_DEFINE_EXCEPTION(OSError, Exception)
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/*
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MP_DEFINE_EXCEPTION_BASE(OSError)
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MP_DEFINE_EXCEPTION(BlockingIOError, OSError)
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MP_DEFINE_EXCEPTION(ChildProcessError, OSError)
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MP_DEFINE_EXCEPTION(ConnectionError, OSError)
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MP_DEFINE_EXCEPTION(BrokenPipeError, ConnectionError)
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MP_DEFINE_EXCEPTION(ConnectionAbortedError, ConnectionError)
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MP_DEFINE_EXCEPTION(ConnectionRefusedError, ConnectionError)
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MP_DEFINE_EXCEPTION(ConnectionResetError, ConnectionError)
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MP_DEFINE_EXCEPTION(InterruptedError, OSError)
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MP_DEFINE_EXCEPTION(IsADirectoryError, OSError)
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MP_DEFINE_EXCEPTION(NotADirectoryError, OSError)
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MP_DEFINE_EXCEPTION(PermissionError, OSError)
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MP_DEFINE_EXCEPTION(ProcessLookupError, OSError)
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MP_DEFINE_EXCEPTION(TimeoutError, OSError)
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MP_DEFINE_EXCEPTION(FileExistsError, OSError)
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MP_DEFINE_EXCEPTION(FileNotFoundError, OSError)
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MP_DEFINE_EXCEPTION(ReferenceError, Exception)
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*/
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MP_DEFINE_EXCEPTION(RuntimeError, Exception)
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MP_DEFINE_EXCEPTION_BASE(RuntimeError)
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MP_DEFINE_EXCEPTION(NotImplementedError, RuntimeError)
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MP_DEFINE_EXCEPTION(SyntaxError, Exception)
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MP_DEFINE_EXCEPTION_BASE(SyntaxError)
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MP_DEFINE_EXCEPTION(IndentationError, SyntaxError)
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/*
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MP_DEFINE_EXCEPTION_BASE(IndentationError)
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MP_DEFINE_EXCEPTION(TabError, IndentationError)
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*/
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MP_DEFINE_EXCEPTION(SystemError, Exception)
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MP_DEFINE_EXCEPTION(TypeError, Exception)
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MP_DEFINE_EXCEPTION(ValueError, Exception)
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//TODO: Implement UnicodeErrors which take arguments
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/*
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MP_DEFINE_EXCEPTION(Warning, Exception)
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MP_DEFINE_EXCEPTION_BASE(Warning)
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MP_DEFINE_EXCEPTION(DeprecationWarning, Warning)
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MP_DEFINE_EXCEPTION(PendingDeprecationWarning, Warning)
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MP_DEFINE_EXCEPTION(RuntimeWarning, Warning)
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MP_DEFINE_EXCEPTION(SyntaxWarning, Warning)
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MP_DEFINE_EXCEPTION(UserWarning, Warning)
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MP_DEFINE_EXCEPTION(FutureWarning, Warning)
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MP_DEFINE_EXCEPTION(ImportWarning, Warning)
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MP_DEFINE_EXCEPTION(UnicodeWarning, Warning)
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MP_DEFINE_EXCEPTION(BytesWarning, Warning)
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MP_DEFINE_EXCEPTION(ResourceWarning, Warning)
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*/
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mp_obj_t mp_obj_new_exception(const mp_obj_type_t *exc_type) {
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return mp_obj_new_exception_args(exc_type, 0, NULL);
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}
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// "Optimized" version for common(?) case of having 1 exception arg
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mp_obj_t mp_obj_new_exception_arg1(const mp_obj_type_t *exc_type, mp_obj_t arg) {
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return mp_obj_new_exception_args(exc_type, 1, &arg);
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}
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mp_obj_t mp_obj_new_exception_args(const mp_obj_type_t *exc_type, uint n_args, const mp_obj_t *args) {
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assert(exc_type->make_new == mp_obj_exception_make_new);
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return exc_type->make_new((mp_obj_t)exc_type, n_args, 0, args);
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}
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mp_obj_t mp_obj_new_exception_msg(const mp_obj_type_t *exc_type, const char *msg) {
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return mp_obj_new_exception_msg_varg(exc_type, msg);
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}
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mp_obj_t mp_obj_new_exception_msg_varg(const mp_obj_type_t *exc_type, const char *fmt, ...) {
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// check that the given type is an exception type
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assert(exc_type->make_new == mp_obj_exception_make_new);
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// make exception object
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mp_obj_exception_t *o = m_new_obj_var_maybe(mp_obj_exception_t, mp_obj_t, 0);
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if (o == NULL) {
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// Couldn't allocate heap memory; use local data instead.
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// Unfortunately, we won't be able to format the string...
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o = &mp_emergency_exception_obj;
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o->base.type = exc_type;
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o->traceback = MP_OBJ_NULL;
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o->args = mp_const_empty_tuple;
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} else {
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o->base.type = exc_type;
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o->traceback = MP_OBJ_NULL;
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o->args = mp_obj_new_tuple(1, NULL);
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if (fmt == NULL) {
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// no message
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assert(0);
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} else {
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// render exception message and store as .args[0]
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// TODO: optimize bufferbloat
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vstr_t *vstr = vstr_new();
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va_list ap;
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va_start(ap, fmt);
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vstr_vprintf(vstr, fmt, ap);
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va_end(ap);
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o->args->items[0] = mp_obj_new_str(vstr->buf, vstr->len, false);
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vstr_free(vstr);
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}
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}
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return o;
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}
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// return true if the given object is an exception type
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bool mp_obj_is_exception_type(mp_obj_t self_in) {
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if (MP_OBJ_IS_TYPE(self_in, &mp_type_type)) {
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// optimisation when self_in is a builtin exception
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mp_obj_type_t *self = self_in;
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if (self->make_new == mp_obj_exception_make_new) {
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return true;
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}
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}
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return mp_obj_is_subclass_fast(self_in, &mp_type_BaseException);
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}
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// return true if the given object is an instance of an exception type
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bool mp_obj_is_exception_instance(mp_obj_t self_in) {
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return mp_obj_is_exception_type(mp_obj_get_type(self_in));
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}
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// return true if exception (type or instance) is a subclass of given
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// exception type.
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bool mp_obj_exception_match(mp_obj_t exc, const mp_obj_type_t *exc_type) {
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// TODO: move implementation from RT_BINARY_OP_EXCEPTION_MATCH here.
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return mp_binary_op(MP_BINARY_OP_EXCEPTION_MATCH, exc, (mp_obj_t)exc_type) == mp_const_true;
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}
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// traceback handling functions
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#define GET_NATIVE_EXCEPTION(self, self_in) \
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/* make sure self_in is an exception instance */ \
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assert(mp_obj_is_exception_instance(self_in)); \
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mp_obj_exception_t *self; \
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if (mp_obj_is_native_exception_instance(self_in)) { \
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self = self_in; \
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} else { \
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self = ((mp_obj_instance_t*)self_in)->subobj[0]; \
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}
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void mp_obj_exception_clear_traceback(mp_obj_t self_in) {
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GET_NATIVE_EXCEPTION(self, self_in);
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// just set the traceback to the null object
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// we don't want to call any memory management functions here
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self->traceback = MP_OBJ_NULL;
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}
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void mp_obj_exception_add_traceback(mp_obj_t self_in, qstr file, machine_uint_t line, qstr block) {
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GET_NATIVE_EXCEPTION(self, self_in);
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// for traceback, we are just using the list object for convenience, it's not really a list of Python objects
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if (self->traceback == MP_OBJ_NULL) {
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self->traceback = mp_obj_new_list(0, NULL);
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}
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mp_obj_list_append(self->traceback, (mp_obj_t)(machine_uint_t)file);
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mp_obj_list_append(self->traceback, (mp_obj_t)(machine_uint_t)line);
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mp_obj_list_append(self->traceback, (mp_obj_t)(machine_uint_t)block);
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}
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void mp_obj_exception_get_traceback(mp_obj_t self_in, machine_uint_t *n, machine_uint_t **values) {
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GET_NATIVE_EXCEPTION(self, self_in);
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if (self->traceback == MP_OBJ_NULL) {
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*n = 0;
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*values = NULL;
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} else {
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uint n2;
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mp_obj_list_get(self->traceback, &n2, (mp_obj_t**)values);
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*n = n2;
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}
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}
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