d45e5f8c35
If an OSError is raised with an integer argument, and that integer corresponds to an errno, then the string for the errno is used as the argument to the exception, instead of the integer. Only works if the uerrno module is enabled.
481 lines
18 KiB
C
481 lines
18 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 <stdio.h>
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#include "py/mpstate.h"
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#include "py/objlist.h"
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#include "py/objstr.h"
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#include "py/objtuple.h"
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#include "py/objtype.h"
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#include "py/runtime.h"
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#include "py/gc.h"
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#include "py/mperrno.h"
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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}, 0, 0, NULL, (mp_obj_tuple_t*)&mp_const_empty_tuple_obj};
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// Optionally allocated buffer for storing the first argument of an exception
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// allocated when the heap is locked.
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#if MICROPY_ENABLE_EMERGENCY_EXCEPTION_BUF
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# if MICROPY_EMERGENCY_EXCEPTION_BUF_SIZE > 0
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#define mp_emergency_exception_buf_size MICROPY_EMERGENCY_EXCEPTION_BUF_SIZE
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void mp_init_emergency_exception_buf(void) {
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// Nothing to do since the buffer was declared statically. We put this
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// definition here so that the calling code can call this function
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// regardless of how its configured (makes the calling code a bit cleaner).
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}
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#else
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#define mp_emergency_exception_buf_size MP_STATE_VM(mp_emergency_exception_buf_size)
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void mp_init_emergency_exception_buf(void) {
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mp_emergency_exception_buf_size = 0;
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MP_STATE_VM(mp_emergency_exception_buf) = NULL;
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}
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mp_obj_t mp_alloc_emergency_exception_buf(mp_obj_t size_in) {
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mp_int_t size = mp_obj_get_int(size_in);
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void *buf = NULL;
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if (size > 0) {
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buf = m_new(byte, size);
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}
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int old_size = mp_emergency_exception_buf_size;
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void *old_buf = MP_STATE_VM(mp_emergency_exception_buf);
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// Update the 2 variables atomically so that an interrupt can't occur
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// between the assignments.
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mp_uint_t atomic_state = MICROPY_BEGIN_ATOMIC_SECTION();
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mp_emergency_exception_buf_size = size;
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MP_STATE_VM(mp_emergency_exception_buf) = buf;
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MICROPY_END_ATOMIC_SECTION(atomic_state);
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if (old_buf != NULL) {
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m_del(byte, old_buf, old_size);
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}
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return mp_const_none;
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}
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#endif
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#endif // MICROPY_ENABLE_EMERGENCY_EXCEPTION_BUF
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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}, 0, 0, NULL, (mp_obj_tuple_t*)&mp_const_empty_tuple_obj};
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STATIC void mp_obj_exception_print(const mp_print_t *print, mp_obj_t o_in, mp_print_kind_t kind) {
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mp_obj_exception_t *o = MP_OBJ_TO_PTR(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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mp_print_str(print, qstr_str(o->base.type->name));
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}
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if (k == PRINT_EXC) {
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mp_print_str(print, ": ");
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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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mp_print_str(print, "");
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return;
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} else if (o->args->len == 1) {
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mp_obj_print_helper(print, 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, MP_OBJ_FROM_PTR(o->args), kind);
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}
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mp_obj_t mp_obj_exception_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
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mp_arg_check_num(n_args, n_kw, 0, MP_OBJ_FUN_ARGS_MAX, false);
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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_STATE_VM(mp_emergency_exception_obj);
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// We can't store any args.
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o->args = (mp_obj_tuple_t*)&mp_const_empty_tuple_obj;
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} else {
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o->args = MP_OBJ_TO_PTR(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_data = NULL;
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return MP_OBJ_FROM_PTR(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 = MP_OBJ_TO_PTR(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_attr(mp_obj_t self_in, qstr attr, mp_obj_t *dest) {
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if (dest[0] != MP_OBJ_NULL) {
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// not load attribute
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return;
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}
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mp_obj_exception_t *self = MP_OBJ_TO_PTR(self_in);
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if (attr == MP_QSTR_args) {
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dest[0] = MP_OBJ_FROM_PTR(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_in);
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}
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}
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STATIC mp_obj_t exc___init__(size_t n_args, const mp_obj_t *args) {
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mp_obj_exception_t *self = MP_OBJ_TO_PTR(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 = MP_OBJ_TO_PTR(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_rom_map_elem_t exc_locals_dict_table[] = {
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{ MP_ROM_QSTR(MP_QSTR___init__), MP_ROM_PTR(&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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.attr = exception_attr,
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.locals_dict = (mp_obj_dict_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_rom_obj_tuple_t mp_type_ ## base_name ## _base_tuple = {{&mp_type_tuple}, 1, {MP_ROM_PTR(&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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.attr = exception_attr, \
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.bases_tuple = (mp_obj_tuple_t*)(mp_rom_obj_tuple_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/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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#if MICROPY_PY_ASYNC_AWAIT
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MP_DEFINE_EXCEPTION(StopAsyncIteration, Exception)
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#endif
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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) use OSError instead
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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) use OSError instead
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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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#if MICROPY_PY_BUILTINS_TIMEOUTERROR
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MP_DEFINE_EXCEPTION_BASE(OSError)
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MP_DEFINE_EXCEPTION(TimeoutError, OSError)
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#endif
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/*
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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(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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#if MICROPY_EMIT_NATIVE
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MP_DEFINE_EXCEPTION_BASE(TypeError)
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MP_DEFINE_EXCEPTION(ViperTypeError, TypeError)
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#endif
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MP_DEFINE_EXCEPTION(ValueError, Exception)
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#if MICROPY_PY_BUILTINS_STR_UNICODE
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MP_DEFINE_EXCEPTION_BASE(ValueError)
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MP_DEFINE_EXCEPTION(UnicodeError, ValueError)
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//TODO: Implement more UnicodeError subclasses which take arguments
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#endif
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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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// try to provide a nice string instead of numeric value for errno's
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if (exc_type == &mp_type_OSError && MP_OBJ_IS_SMALL_INT(arg)) {
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arg = mp_errno_to_str(arg);
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}
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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, mp_uint_t 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(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_STATE_VM(mp_emergency_exception_obj);
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o->base.type = exc_type;
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o->traceback_data = NULL;
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o->args = (mp_obj_tuple_t*)&mp_const_empty_tuple_obj;
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#if MICROPY_ENABLE_EMERGENCY_EXCEPTION_BUF
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// If the user has provided a buffer, then we try to create a tuple
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// of length 1, which has a string object and the string data.
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if (mp_emergency_exception_buf_size > (sizeof(mp_obj_tuple_t) + sizeof(mp_obj_str_t) + sizeof(mp_obj_t))) {
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mp_obj_tuple_t *tuple = (mp_obj_tuple_t *)MP_STATE_VM(mp_emergency_exception_buf);
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mp_obj_str_t *str = (mp_obj_str_t *)&tuple->items[1];
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tuple->base.type = &mp_type_tuple;
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tuple->len = 1;
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tuple->items[0] = MP_OBJ_FROM_PTR(str);
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byte *str_data = (byte *)&str[1];
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uint max_len = MP_STATE_VM(mp_emergency_exception_buf) + mp_emergency_exception_buf_size
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- str_data;
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vstr_t vstr;
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vstr_init_fixed_buf(&vstr, max_len, (char *)str_data);
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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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str->base.type = &mp_type_str;
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str->hash = qstr_compute_hash(str_data, str->len);
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str->len = vstr.len;
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str->data = str_data;
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o->args = tuple;
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uint offset = &str_data[str->len] - MP_STATE_VM(mp_emergency_exception_buf);
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offset += sizeof(void *) - 1;
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offset &= ~(sizeof(void *) - 1);
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if ((mp_emergency_exception_buf_size - offset) > (sizeof(o->traceback_data[0]) * 3)) {
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// We have room to store some traceback.
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o->traceback_data = (size_t*)((byte *)MP_STATE_VM(mp_emergency_exception_buf) + offset);
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o->traceback_alloc = (MP_STATE_VM(mp_emergency_exception_buf) + mp_emergency_exception_buf_size - (byte *)o->traceback_data) / sizeof(o->traceback_data[0]);
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o->traceback_len = 0;
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}
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}
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#endif // MICROPY_ENABLE_EMERGENCY_EXCEPTION_BUF
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} else {
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o->base.type = exc_type;
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o->traceback_data = NULL;
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o->args = MP_OBJ_TO_PTR(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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if (strchr(fmt, '%') == NULL) {
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// no formatting substitutions, avoid allocating vstr.
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o->args->items[0] = mp_obj_new_str(fmt, strlen(fmt), false);
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} else {
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// render exception message and store as .args[0]
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va_list ap;
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vstr_t vstr;
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vstr_init(&vstr, 16);
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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_from_vstr(&mp_type_str, &vstr);
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}
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}
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}
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return MP_OBJ_FROM_PTR(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 = MP_OBJ_TO_PTR(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_OBJ_FROM_PTR(&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_FROM_PTR(mp_obj_get_type(self_in)));
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}
|
|
|
|
// Return true if exception (type or instance) is a subclass of given
|
|
// exception type. Assumes exc_type is a subclass of BaseException, as
|
|
// defined by mp_obj_is_exception_type(exc_type).
|
|
bool mp_obj_exception_match(mp_obj_t exc, mp_const_obj_t exc_type) {
|
|
// if exc is an instance of an exception, then extract and use its type
|
|
if (mp_obj_is_exception_instance(exc)) {
|
|
exc = MP_OBJ_FROM_PTR(mp_obj_get_type(exc));
|
|
}
|
|
return mp_obj_is_subclass_fast(exc, exc_type);
|
|
}
|
|
|
|
// traceback handling functions
|
|
|
|
#define GET_NATIVE_EXCEPTION(self, self_in) \
|
|
/* make sure self_in is an exception instance */ \
|
|
assert(mp_obj_is_exception_instance(self_in)); \
|
|
mp_obj_exception_t *self; \
|
|
if (mp_obj_is_native_exception_instance(self_in)) { \
|
|
self = MP_OBJ_TO_PTR(self_in); \
|
|
} else { \
|
|
self = MP_OBJ_TO_PTR(((mp_obj_instance_t*)MP_OBJ_TO_PTR(self_in))->subobj[0]); \
|
|
}
|
|
|
|
void mp_obj_exception_clear_traceback(mp_obj_t self_in) {
|
|
GET_NATIVE_EXCEPTION(self, self_in);
|
|
// just set the traceback to the null object
|
|
// we don't want to call any memory management functions here
|
|
self->traceback_data = NULL;
|
|
}
|
|
|
|
void mp_obj_exception_add_traceback(mp_obj_t self_in, qstr file, size_t line, qstr block) {
|
|
GET_NATIVE_EXCEPTION(self, self_in);
|
|
|
|
// append this traceback info to traceback data
|
|
// if memory allocation fails (eg because gc is locked), just return
|
|
|
|
if (self->traceback_data == NULL) {
|
|
self->traceback_data = m_new_maybe(size_t, 3);
|
|
if (self->traceback_data == NULL) {
|
|
return;
|
|
}
|
|
self->traceback_alloc = 3;
|
|
self->traceback_len = 0;
|
|
} else if (self->traceback_len + 3 > self->traceback_alloc) {
|
|
// be conservative with growing traceback data
|
|
size_t *tb_data = m_renew_maybe(size_t, self->traceback_data, self->traceback_alloc, self->traceback_alloc + 3, true);
|
|
if (tb_data == NULL) {
|
|
return;
|
|
}
|
|
self->traceback_data = tb_data;
|
|
self->traceback_alloc += 3;
|
|
}
|
|
|
|
size_t *tb_data = &self->traceback_data[self->traceback_len];
|
|
self->traceback_len += 3;
|
|
tb_data[0] = file;
|
|
tb_data[1] = line;
|
|
tb_data[2] = block;
|
|
}
|
|
|
|
void mp_obj_exception_get_traceback(mp_obj_t self_in, size_t *n, size_t **values) {
|
|
GET_NATIVE_EXCEPTION(self, self_in);
|
|
|
|
if (self->traceback_data == NULL) {
|
|
*n = 0;
|
|
*values = NULL;
|
|
} else {
|
|
*n = self->traceback_len;
|
|
*values = self->traceback_data;
|
|
}
|
|
}
|