748 lines
30 KiB
C
748 lines
30 KiB
C
/*
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* This file is part of the MicroPython 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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* Copyright (c) 2014-2016 Paul Sokolovsky
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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/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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#if MICROPY_ROM_TEXT_COMPRESSION && !defined(NO_QSTR)
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// Extract the MP_MAX_UNCOMPRESSED_TEXT_LEN macro from "genhdr/compressed.data.h".
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// Only need this if compression enabled and in a regular build (i.e. not during QSTR extraction).
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#define MP_MATCH_COMPRESSED(...) // Ignore
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#define MP_COMPRESSED_DATA(...) // Ignore
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#include "genhdr/compressed.data.h"
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#undef MP_MATCH_COMPRESSED
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#undef MP_COMPRESSED_DATA
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#endif
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// Number of items per traceback entry (file, line, block)
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#define TRACEBACK_ENTRY_LEN (3)
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// Optionally allocated buffer for storing some traceback, the tuple argument,
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// and possible string object and data, for when the heap is locked.
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#if MICROPY_ENABLE_EMERGENCY_EXCEPTION_BUF
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// When used the layout of the emergency exception buffer is:
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// - traceback entry (file, line, block)
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// - traceback entry (file, line, block)
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// - mp_obj_tuple_t object
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// - n_args * mp_obj_t for tuple
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// - mp_obj_str_t object
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// - string data
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#define EMG_BUF_TRACEBACK_OFFSET (0)
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#define EMG_BUF_TRACEBACK_SIZE (2 * TRACEBACK_ENTRY_LEN * sizeof(size_t))
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#define EMG_BUF_TUPLE_OFFSET (EMG_BUF_TRACEBACK_OFFSET + EMG_BUF_TRACEBACK_SIZE)
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#define EMG_BUF_TUPLE_SIZE(n_args) (sizeof(mp_obj_tuple_t) + n_args * sizeof(mp_obj_t))
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#define EMG_BUF_STR_OFFSET (EMG_BUF_TUPLE_OFFSET + EMG_BUF_TUPLE_SIZE(1))
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#define EMG_BUF_STR_BUF_OFFSET (EMG_BUF_STR_OFFSET + sizeof(mp_obj_str_t))
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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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bool mp_obj_is_native_exception_instance(mp_obj_t self_in) {
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return MP_OBJ_TYPE_GET_SLOT_OR_NULL(mp_obj_get_type(self_in), make_new) == mp_obj_exception_make_new;
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}
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mp_obj_exception_t *get_native_exception(mp_obj_t self_in) {
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assert(mp_obj_is_exception_instance(self_in));
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if (mp_obj_is_native_exception_instance(self_in)) {
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return MP_OBJ_TO_PTR(self_in);
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} else {
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return MP_OBJ_TO_PTR(((mp_obj_instance_t *)MP_OBJ_TO_PTR(self_in))->subobj[0]);
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}
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}
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STATIC void decompress_error_text_maybe(mp_obj_exception_t *o) {
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#if MICROPY_ROM_TEXT_COMPRESSION
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if (o->args->len == 1 && mp_obj_is_exact_type(o->args->items[0], &mp_type_str)) {
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mp_obj_str_t *o_str = MP_OBJ_TO_PTR(o->args->items[0]);
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if (MP_IS_COMPRESSED_ROM_STRING(o_str->data)) {
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byte *buf = m_new_maybe(byte, MP_MAX_UNCOMPRESSED_TEXT_LEN + 1);
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if (!buf) {
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#if MICROPY_ENABLE_EMERGENCY_EXCEPTION_BUF
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// Try and use the emergency exception buf if enough space is available.
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buf = (byte *)((uint8_t *)MP_STATE_VM(mp_emergency_exception_buf) + EMG_BUF_STR_BUF_OFFSET);
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size_t avail = (uint8_t *)MP_STATE_VM(mp_emergency_exception_buf) + mp_emergency_exception_buf_size - buf;
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if (avail < MP_MAX_UNCOMPRESSED_TEXT_LEN + 1) {
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// No way to decompress, fallback to no message text.
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o->args = (mp_obj_tuple_t *)&mp_const_empty_tuple_obj;
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return;
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}
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#else
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o->args = (mp_obj_tuple_t *)&mp_const_empty_tuple_obj;
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return;
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#endif
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}
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mp_decompress_rom_string(buf, (mp_rom_error_text_t)o_str->data);
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o_str->data = buf;
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o_str->len = strlen((const char *)buf);
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o_str->hash = 0;
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}
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// Lazily compute the string hash.
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if (o_str->hash == 0) {
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o_str->hash = qstr_compute_hash(o_str->data, o_str->len);
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}
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}
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#endif
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}
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mp_obj_exception_t *mp_obj_exception_get_native(mp_obj_t self_in) {
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assert(mp_obj_is_exception_instance(self_in));
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if (mp_obj_is_native_exception_instance(self_in)) {
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return MP_OBJ_TO_PTR(self_in);
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} else {
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return MP_OBJ_TO_PTR(((mp_obj_instance_t *)MP_OBJ_TO_PTR(self_in))->subobj[0]);
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}
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}
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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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decompress_error_text_maybe(o);
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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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}
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#if MICROPY_PY_UERRNO
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// try to provide a nice OSError error message
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if (o->base.type == &mp_type_OSError && o->args->len > 0 && o->args->len < 3 && mp_obj_is_small_int(o->args->items[0])) {
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// CIRCUITPY can print a whole string, not just the errno qstr
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char decompressed[50];
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const char *msg = mp_common_errno_to_str(o->args->items[0], decompressed, sizeof(decompressed));
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if (msg != NULL) {
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mp_printf(print, "[Errno " INT_FMT "] %s", MP_OBJ_SMALL_INT_VALUE(o->args->items[0]), msg);
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if (o->args->len > 1) {
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mp_print_str(print, ": ");
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mp_obj_print_helper(print, o->args->items[1], PRINT_STR);
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}
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return;
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}
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}
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#endif
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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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// CIRCUITPY
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void mp_obj_exception_initialize0(mp_obj_exception_t *o_exc, const mp_obj_type_t *type) {
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o_exc->base.type = type;
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o_exc->args = (mp_obj_tuple_t *)&mp_const_empty_tuple_obj;
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mp_obj_exception_clear_traceback(o_exc);
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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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// Try to allocate memory for the exception, with fallback to emergency exception object
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mp_obj_exception_t *o_exc = m_new_obj_maybe(mp_obj_exception_t);
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if (o_exc == NULL) {
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o_exc = &MP_STATE_VM(mp_emergency_exception_obj);
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}
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// Populate the exception object
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o_exc->base.type = type;
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o_exc->traceback = (mp_obj_traceback_t *)&mp_const_empty_traceback_obj;
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mp_obj_tuple_t *o_tuple;
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if (n_args == 0) {
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// No args, can use the empty tuple straight away
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o_tuple = (mp_obj_tuple_t *)&mp_const_empty_tuple_obj;
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} else {
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// Try to allocate memory for the tuple containing the args
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o_tuple = m_new_obj_var_maybe(mp_obj_tuple_t, mp_obj_t, n_args);
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#if MICROPY_ENABLE_EMERGENCY_EXCEPTION_BUF
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// If we are called by mp_obj_new_exception_msg_varg then it will have
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// reserved room (after the traceback data) for a tuple with 1 element.
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// Otherwise we are free to use the whole buffer after the traceback data.
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if (o_tuple == NULL && mp_emergency_exception_buf_size >=
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(mp_int_t)(EMG_BUF_TUPLE_OFFSET + EMG_BUF_TUPLE_SIZE(n_args))) {
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o_tuple = (mp_obj_tuple_t *)
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((uint8_t *)MP_STATE_VM(mp_emergency_exception_buf) + EMG_BUF_TUPLE_OFFSET);
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}
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#endif
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if (o_tuple == NULL) {
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// No memory for a tuple, fallback to an empty tuple
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o_tuple = (mp_obj_tuple_t *)&mp_const_empty_tuple_obj;
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} else {
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// Have memory for a tuple so populate it
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o_tuple->base.type = &mp_type_tuple;
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o_tuple->len = n_args;
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memcpy(o_tuple->items, args, n_args * sizeof(mp_obj_t));
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}
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}
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// Store the tuple of args in the exception object
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o_exc->args = o_tuple;
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return MP_OBJ_FROM_PTR(o_exc);
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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 = get_native_exception(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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decompress_error_text_maybe(self);
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return self->args->items[0];
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}
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}
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void mp_obj_exception_attr(mp_obj_t self_in, qstr attr, mp_obj_t *dest) {
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mp_obj_exception_t *self = MP_OBJ_TO_PTR(self_in);
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if (dest[0] != MP_OBJ_NULL) {
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// store/delete attribute
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#if MICROPY_CONST_GENERATOREXIT_OBJ
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if (self == &mp_const_GeneratorExit_obj) {
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mp_raise_AttributeError(MP_ERROR_TEXT("can't set attribute"));
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}
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#endif
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if (attr == MP_QSTR___traceback__) {
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if (dest[1] == mp_const_none) {
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self->traceback = (mp_obj_traceback_t *)&mp_const_empty_traceback_obj;
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} else {
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if (!mp_obj_is_type(dest[1], &mp_type_traceback)) {
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mp_raise_TypeError_varg(MP_ERROR_TEXT("%q must be of type %q or %q, not %q"), MP_QSTR___context__, MP_QSTR_traceback, MP_QSTR_None, mp_obj_get_type(dest[1])->name);
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}
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self->traceback = MP_OBJ_TO_PTR(dest[1]);
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}
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dest[0] = MP_OBJ_NULL; // indicate success
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#if MICROPY_CPYTHON_EXCEPTION_CHAIN
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} else if (attr == MP_QSTR___cause__) {
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if (dest[1] == mp_const_none) {
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self->cause = NULL;
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} else if (!mp_obj_is_type(dest[1], &mp_type_BaseException)) {
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self->cause = dest[1];
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} else {
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mp_raise_TypeError_varg(MP_ERROR_TEXT("%q must be of type %q or %q, not %q"), attr, MP_QSTR_BaseException, MP_QSTR_None, mp_obj_get_type(dest[1])->name);
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}
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self->suppress_context = true;
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dest[0] = MP_OBJ_NULL; // indicate success
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} else if (attr == MP_QSTR___context__) {
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if (dest[1] == mp_const_none) {
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self->context = NULL;
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} else if (!mp_obj_is_type(dest[1], &mp_type_BaseException)) {
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self->context = dest[1];
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} else {
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mp_raise_TypeError_varg(MP_ERROR_TEXT("%q must be of type %q or %q, not %q"), attr, MP_QSTR_BaseException, MP_QSTR_None, mp_obj_get_type(dest[1])->name);
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}
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dest[0] = MP_OBJ_NULL; // indicate success
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} else if (attr == MP_QSTR___suppress_context__) {
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self->suppress_context = mp_obj_is_true(dest[1]);
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dest[0] = MP_OBJ_NULL; // indicate success
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#endif
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}
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return;
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}
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if (attr == MP_QSTR_args) {
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decompress_error_text_maybe(self);
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dest[0] = MP_OBJ_FROM_PTR(self->args);
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} else if (attr == MP_QSTR_value && self->base.type == &mp_type_StopIteration) {
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dest[0] = mp_obj_exception_get_value(self_in);
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} else if (attr == MP_QSTR___traceback__) {
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dest[0] = (self->traceback) ? MP_OBJ_FROM_PTR(self->traceback) : mp_const_none;
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#if MICROPY_CPYTHON_EXCEPTION_CHAIN
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} else if (attr == MP_QSTR___cause__) {
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dest[0] = (self->cause) ? MP_OBJ_FROM_PTR(self->cause) : mp_const_none;
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} else if (attr == MP_QSTR___context__) {
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dest[0] = (self->context) ? MP_OBJ_FROM_PTR(self->context) : mp_const_none;
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} else if (attr == MP_QSTR___suppress_context__) {
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dest[0] = mp_obj_new_bool(self->suppress_context);
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#endif
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#if MICROPY_CPYTHON_COMPAT
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} else if (mp_obj_is_subclass_fast(MP_OBJ_FROM_PTR(self->base.type), MP_OBJ_FROM_PTR(&mp_type_OSError))) {
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if (attr == MP_QSTR_errno) {
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dest[0] = mp_obj_exception_get_value(self_in);
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} else if (attr == MP_QSTR_strerror) {
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if (self->args->len > 1) {
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dest[0] = self->args->items[1];
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} else if (self->args->len > 0) {
|
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char decompressed[50];
|
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const char *msg = mp_common_errno_to_str(self->args->items[0], decompressed, sizeof(decompressed));
|
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if (msg != NULL) {
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dest[0] = mp_obj_new_str(msg, strlen(msg));
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} else {
|
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dest[0] = mp_const_none;
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}
|
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} else {
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dest[0] = mp_const_none;
|
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}
|
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} else if (attr == MP_QSTR_filename) {
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dest[0] = self->args->len > 2 ? self->args->items[2] : mp_const_none;
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// skip winerror
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|
} else if (attr == MP_QSTR_filename2) {
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dest[0] = self->args->len > 4 ? self->args->items[4] : mp_const_none;
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}
|
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#endif
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}
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}
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|
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MP_DEFINE_CONST_OBJ_TYPE(
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mp_type_BaseException,
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MP_QSTR_BaseException,
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MP_TYPE_FLAG_NONE,
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make_new, mp_obj_exception_make_new,
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print, mp_obj_exception_print,
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attr, mp_obj_exception_attr
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);
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|
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// *FORMAT-OFF*
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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
|
|
MP_DEFINE_EXCEPTION(SystemExit, BaseException)
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MP_DEFINE_EXCEPTION(KeyboardInterrupt, BaseException)
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|
// CIRCUITPY
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MP_DEFINE_EXCEPTION(ReloadException, BaseException)
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MP_DEFINE_EXCEPTION(GeneratorExit, BaseException)
|
|
MP_DEFINE_EXCEPTION(Exception, BaseException)
|
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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)
|
|
//MP_DEFINE_EXCEPTION(FloatingPointError, ArithmeticError)
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|
MP_DEFINE_EXCEPTION(OverflowError, ArithmeticError)
|
|
MP_DEFINE_EXCEPTION(ZeroDivisionError, ArithmeticError)
|
|
MP_DEFINE_EXCEPTION(AssertionError, Exception)
|
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MP_DEFINE_EXCEPTION(AttributeError, Exception)
|
|
//MP_DEFINE_EXCEPTION(BufferError, Exception)
|
|
MP_DEFINE_EXCEPTION(EOFError, Exception)
|
|
MP_DEFINE_EXCEPTION(ImportError, Exception)
|
|
MP_DEFINE_EXCEPTION(LookupError, Exception)
|
|
MP_DEFINE_EXCEPTION(IndexError, LookupError)
|
|
MP_DEFINE_EXCEPTION(KeyError, LookupError)
|
|
MP_DEFINE_EXCEPTION(MemoryError, Exception)
|
|
MP_DEFINE_EXCEPTION(NameError, Exception)
|
|
/*
|
|
MP_DEFINE_EXCEPTION(UnboundLocalError, NameError)
|
|
*/
|
|
MP_DEFINE_EXCEPTION(OSError, Exception)
|
|
/*
|
|
MP_DEFINE_EXCEPTION(BlockingIOError, OSError)
|
|
MP_DEFINE_EXCEPTION(ChildProcessError, OSError)
|
|
MP_DEFINE_EXCEPTION(ConnectionError, OSError)
|
|
MP_DEFINE_EXCEPTION(BrokenPipeError, ConnectionError)
|
|
MP_DEFINE_EXCEPTION(ConnectionAbortedError, ConnectionError)
|
|
MP_DEFINE_EXCEPTION(ConnectionRefusedError, ConnectionError)
|
|
MP_DEFINE_EXCEPTION(ConnectionResetError, ConnectionError)
|
|
MP_DEFINE_EXCEPTION(InterruptedError, OSError)
|
|
MP_DEFINE_EXCEPTION(IsADirectoryError, OSError)
|
|
MP_DEFINE_EXCEPTION(NotADirectoryError, OSError)
|
|
MP_DEFINE_EXCEPTION(PermissionError, OSError)
|
|
MP_DEFINE_EXCEPTION(ProcessLookupError, OSError)
|
|
MP_DEFINE_EXCEPTION(TimeoutError, OSError)
|
|
MP_DEFINE_EXCEPTION(FileExistsError, OSError)
|
|
MP_DEFINE_EXCEPTION(FileNotFoundError, OSError)
|
|
MP_DEFINE_EXCEPTION(ReferenceError, Exception)
|
|
*/
|
|
MP_DEFINE_EXCEPTION(RuntimeError, Exception)
|
|
MP_DEFINE_EXCEPTION(NotImplementedError, RuntimeError)
|
|
MP_DEFINE_EXCEPTION(SyntaxError, Exception)
|
|
MP_DEFINE_EXCEPTION(IndentationError, SyntaxError)
|
|
/*
|
|
MP_DEFINE_EXCEPTION(TabError, IndentationError)
|
|
*/
|
|
//MP_DEFINE_EXCEPTION(SystemError, Exception)
|
|
MP_DEFINE_EXCEPTION(TypeError, Exception)
|
|
#if MICROPY_EMIT_NATIVE
|
|
MP_DEFINE_EXCEPTION(ViperTypeError, TypeError)
|
|
#endif
|
|
MP_DEFINE_EXCEPTION(ValueError, Exception)
|
|
#if MICROPY_PY_BUILTINS_STR_UNICODE
|
|
MP_DEFINE_EXCEPTION(UnicodeError, ValueError)
|
|
//TODO: Implement more UnicodeError subclasses which take arguments
|
|
#endif
|
|
#if CIRCUITPY_ALARM
|
|
MP_DEFINE_EXCEPTION(DeepSleepRequest, BaseException)
|
|
#endif
|
|
/*
|
|
MP_DEFINE_EXCEPTION(Warning, Exception)
|
|
MP_DEFINE_EXCEPTION(DeprecationWarning, Warning)
|
|
MP_DEFINE_EXCEPTION(PendingDeprecationWarning, Warning)
|
|
MP_DEFINE_EXCEPTION(RuntimeWarning, Warning)
|
|
MP_DEFINE_EXCEPTION(SyntaxWarning, Warning)
|
|
MP_DEFINE_EXCEPTION(UserWarning, Warning)
|
|
MP_DEFINE_EXCEPTION(FutureWarning, Warning)
|
|
MP_DEFINE_EXCEPTION(ImportWarning, Warning)
|
|
MP_DEFINE_EXCEPTION(UnicodeWarning, Warning)
|
|
MP_DEFINE_EXCEPTION(BytesWarning, Warning)
|
|
MP_DEFINE_EXCEPTION(ResourceWarning, Warning)
|
|
*/
|
|
|
|
// *FORMAT-ON*
|
|
|
|
mp_obj_t mp_obj_new_exception(const mp_obj_type_t *exc_type) {
|
|
assert(MP_OBJ_TYPE_GET_SLOT_OR_NULL(exc_type, make_new) == mp_obj_exception_make_new);
|
|
return mp_obj_exception_make_new(exc_type, 0, 0, NULL);
|
|
}
|
|
|
|
mp_obj_t mp_obj_new_exception_args(const mp_obj_type_t *exc_type, size_t n_args, const mp_obj_t *args) {
|
|
assert(MP_OBJ_TYPE_GET_SLOT_OR_NULL(exc_type, make_new) == mp_obj_exception_make_new);
|
|
return mp_obj_exception_make_new(exc_type, n_args, 0, args);
|
|
}
|
|
|
|
#if MICROPY_ERROR_REPORTING != MICROPY_ERROR_REPORTING_NONE
|
|
mp_obj_t mp_obj_new_exception_msg(const mp_obj_type_t *exc_type, const compressed_string_t *msg) {
|
|
return mp_obj_new_exception_msg_varg(exc_type, msg);
|
|
}
|
|
|
|
// The following struct and function implement a simple printer that conservatively
|
|
// allocates memory and truncates the output data if no more memory can be obtained.
|
|
// It leaves room for a null byte at the end of the buffer.
|
|
|
|
struct _exc_printer_t {
|
|
bool allow_realloc;
|
|
size_t alloc;
|
|
size_t len;
|
|
byte *buf;
|
|
};
|
|
|
|
STATIC void exc_add_strn(void *data, const char *str, size_t len) {
|
|
struct _exc_printer_t *pr = data;
|
|
if (pr->len + len >= pr->alloc) {
|
|
// Not enough room for data plus a null byte so try to grow the buffer
|
|
if (pr->allow_realloc) {
|
|
size_t new_alloc = pr->alloc + len + 16;
|
|
byte *new_buf = m_renew_maybe(byte, pr->buf, pr->alloc, new_alloc, true);
|
|
if (new_buf == NULL) {
|
|
pr->allow_realloc = false;
|
|
len = pr->alloc - pr->len - 1;
|
|
} else {
|
|
pr->alloc = new_alloc;
|
|
pr->buf = new_buf;
|
|
}
|
|
} else {
|
|
len = pr->alloc - pr->len - 1;
|
|
}
|
|
}
|
|
memcpy(pr->buf + pr->len, str, len);
|
|
pr->len += len;
|
|
}
|
|
|
|
mp_obj_t mp_obj_new_exception_msg_varg(const mp_obj_type_t *exc_type, const compressed_string_t *fmt, ...) {
|
|
va_list args;
|
|
va_start(args, fmt);
|
|
mp_obj_t exc = mp_obj_new_exception_msg_vlist(exc_type, fmt, args);
|
|
va_end(args);
|
|
return exc;
|
|
}
|
|
|
|
mp_obj_t mp_obj_new_exception_msg_vlist(const mp_obj_type_t *exc_type, const compressed_string_t *fmt, va_list ap) {
|
|
assert(fmt != NULL);
|
|
|
|
// Check that the given type is an exception type
|
|
assert(MP_OBJ_TYPE_GET_SLOT_OR_NULL(exc_type, make_new) == mp_obj_exception_make_new);
|
|
|
|
// Try to allocate memory for the message
|
|
mp_obj_str_t *o_str = m_new_obj_maybe(mp_obj_str_t);
|
|
size_t o_str_alloc = decompress_length(fmt);
|
|
byte *o_str_buf = m_new_maybe(byte, o_str_alloc);
|
|
|
|
bool used_emg_buf = false;
|
|
#if MICROPY_ENABLE_EMERGENCY_EXCEPTION_BUF
|
|
// If memory allocation failed and there is an emergency buffer then try to use
|
|
// that buffer to store the string object and its data (at least 16 bytes for
|
|
// the string data), reserving room at the start for the traceback and 1-tuple.
|
|
if ((o_str == NULL || o_str_buf == NULL)
|
|
&& mp_emergency_exception_buf_size >= (mp_int_t)(EMG_BUF_STR_OFFSET + sizeof(mp_obj_str_t) + 16)) {
|
|
used_emg_buf = true;
|
|
o_str = (mp_obj_str_t *)((uint8_t *)MP_STATE_VM(mp_emergency_exception_buf)
|
|
+ EMG_BUF_STR_OFFSET);
|
|
o_str_buf = (byte *)&o_str[1];
|
|
o_str_alloc = (uint8_t *)MP_STATE_VM(mp_emergency_exception_buf)
|
|
+ mp_emergency_exception_buf_size - o_str_buf;
|
|
}
|
|
#endif
|
|
|
|
if (o_str == NULL) {
|
|
// No memory for the string object so create the exception with no args.
|
|
// The exception will only have a type and no message (compression is irrelevant).
|
|
return mp_obj_exception_make_new(exc_type, 0, 0, NULL);
|
|
}
|
|
|
|
if (o_str_buf == NULL) {
|
|
// No memory for the string buffer: the string is compressed so don't add it.
|
|
o_str->len = 0;
|
|
o_str->data = NULL;
|
|
} else {
|
|
// We have some memory to format the string.
|
|
struct _exc_printer_t exc_pr = {!used_emg_buf, o_str_alloc, 0, o_str_buf};
|
|
mp_print_t print = {&exc_pr, exc_add_strn};
|
|
mp_vcprintf(&print, fmt, ap);
|
|
exc_pr.buf[exc_pr.len] = '\0';
|
|
o_str->len = exc_pr.len;
|
|
o_str->data = exc_pr.buf;
|
|
}
|
|
|
|
// Create the string object and call mp_obj_exception_make_new to create the exception
|
|
o_str->base.type = &mp_type_str;
|
|
#if MICROPY_ROM_TEXT_COMPRESSION
|
|
o_str->hash = 0; // will be computed only if string object is accessed
|
|
#else
|
|
o_str->hash = qstr_compute_hash(o_str->data, o_str->len);
|
|
#endif
|
|
mp_obj_t arg = MP_OBJ_FROM_PTR(o_str);
|
|
return mp_obj_exception_make_new(exc_type, 1, 0, &arg);
|
|
}
|
|
|
|
mp_obj_t mp_obj_new_exception_msg_str(const mp_obj_type_t *exc_type, const char *msg) {
|
|
assert(msg != NULL);
|
|
|
|
// Check that the given type is an exception type
|
|
assert(MP_OBJ_TYPE_GET_SLOT_OR_NULL(exc_type, make_new) == mp_obj_exception_make_new);
|
|
|
|
// Try to allocate memory for the message
|
|
mp_obj_str_t *o_str = m_new_obj_maybe(mp_obj_str_t);
|
|
|
|
#if MICROPY_ENABLE_EMERGENCY_EXCEPTION_BUF
|
|
// If memory allocation failed and there is an emergency buffer then try to use
|
|
// that buffer to store the string object and its data (at least 16 bytes for
|
|
// the string data), reserving room at the start for the traceback and 1-tuple.
|
|
if (o_str == NULL
|
|
&& mp_emergency_exception_buf_size >= EMG_BUF_STR_OFFSET + sizeof(mp_obj_str_t) + 16) {
|
|
o_str = (mp_obj_str_t *)((uint8_t *)MP_STATE_VM(mp_emergency_exception_buf)
|
|
+ EMG_BUF_STR_OFFSET);
|
|
}
|
|
#endif
|
|
|
|
if (o_str == NULL) {
|
|
// No memory for the string object so create the exception with no args
|
|
return mp_obj_exception_make_new(exc_type, 0, 0, NULL);
|
|
}
|
|
|
|
// Assume the message is statically allocated.
|
|
o_str->len = strlen(msg);
|
|
o_str->data = (const byte *)msg;
|
|
|
|
// Create the string object and call mp_obj_exception_make_new to create the exception
|
|
o_str->base.type = &mp_type_str;
|
|
o_str->hash = qstr_compute_hash(o_str->data, o_str->len);
|
|
mp_obj_t arg = MP_OBJ_FROM_PTR(o_str);
|
|
return mp_obj_exception_make_new(exc_type, 1, 0, &arg);
|
|
}
|
|
|
|
#endif
|
|
|
|
// return true if the given object is an exception type
|
|
bool mp_obj_is_exception_type(mp_obj_t self_in) {
|
|
if (mp_obj_is_type(self_in, &mp_type_type)) {
|
|
// optimisation when self_in is a builtin exception
|
|
mp_obj_type_t *self = MP_OBJ_TO_PTR(self_in);
|
|
if (MP_OBJ_TYPE_GET_SLOT_OR_NULL(self, make_new) == mp_obj_exception_make_new) {
|
|
return true;
|
|
}
|
|
}
|
|
return mp_obj_is_subclass_fast(self_in, MP_OBJ_FROM_PTR(&mp_type_BaseException));
|
|
}
|
|
|
|
// return true if the given object is an instance of an exception type
|
|
bool mp_obj_is_exception_instance(mp_obj_t self_in) {
|
|
return mp_obj_is_exception_type(MP_OBJ_FROM_PTR(mp_obj_get_type(self_in)));
|
|
}
|
|
|
|
// 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
|
|
|
|
void mp_obj_exception_clear_traceback(mp_obj_t self_in) {
|
|
mp_obj_exception_t *self = get_native_exception(self_in);
|
|
// just set the traceback to the empty traceback object
|
|
// we don't want to call any memory management functions here
|
|
self->traceback = (mp_obj_traceback_t *)&mp_const_empty_traceback_obj;
|
|
#if MICROPY_CPYTHON_EXCEPTION_CHAIN
|
|
self->cause = 0;
|
|
self->context = 0;
|
|
self->suppress_context = false;
|
|
self->marked = false;
|
|
#endif
|
|
}
|
|
|
|
void mp_obj_exception_add_traceback(mp_obj_t self_in, qstr file, size_t line, qstr block) {
|
|
mp_obj_exception_t *self = get_native_exception(self_in);
|
|
|
|
// append this traceback info to traceback data
|
|
// if memory allocation fails (eg because gc is locked), just return
|
|
|
|
#if MICROPY_PY_SYS_TRACEBACKLIMIT
|
|
mp_int_t max_traceback = MP_OBJ_SMALL_INT_VALUE(MP_STATE_VM(sys_mutable[MP_SYS_MUTABLE_TRACEBACKLIMIT]));
|
|
if (max_traceback <= 0) {
|
|
return;
|
|
} else if (self->traceback != NULL && self->traceback->len >= max_traceback * TRACEBACK_ENTRY_LEN) {
|
|
self->traceback->len -= TRACEBACK_ENTRY_LEN;
|
|
memmove(self->traceback->data, self->traceback->data + TRACEBACK_ENTRY_LEN, self->traceback->len * sizeof(self->traceback->data[0]));
|
|
}
|
|
#endif
|
|
|
|
// Try to allocate memory for the traceback, with fallback to emergency traceback object
|
|
if (self->traceback == NULL || self->traceback == (mp_obj_traceback_t *)&mp_const_empty_traceback_obj) {
|
|
self->traceback = m_new_obj_maybe(mp_obj_traceback_t);
|
|
if (self->traceback == NULL) {
|
|
self->traceback = &MP_STATE_VM(mp_emergency_traceback_obj);
|
|
}
|
|
// populate traceback object
|
|
*self->traceback = mp_const_empty_traceback_obj;
|
|
}
|
|
|
|
// append the provided 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, TRACEBACK_ENTRY_LEN);
|
|
if (self->traceback->data == NULL) {
|
|
#if MICROPY_ENABLE_EMERGENCY_EXCEPTION_BUF
|
|
if (mp_emergency_exception_buf_size >= (mp_int_t)(EMG_BUF_TRACEBACK_OFFSET + EMG_BUF_TRACEBACK_SIZE)) {
|
|
// There is room in the emergency buffer for traceback data
|
|
size_t *tb = (size_t *)((uint8_t *)MP_STATE_VM(mp_emergency_exception_buf)
|
|
+ EMG_BUF_TRACEBACK_OFFSET);
|
|
self->traceback->data = tb;
|
|
self->traceback->alloc = EMG_BUF_TRACEBACK_SIZE / sizeof(size_t);
|
|
} else {
|
|
// Can't allocate and no room in emergency buffer
|
|
return;
|
|
}
|
|
#else
|
|
// Can't allocate
|
|
return;
|
|
#endif
|
|
} else {
|
|
// Allocated the traceback data on the heap
|
|
self->traceback->alloc = TRACEBACK_ENTRY_LEN;
|
|
}
|
|
self->traceback->len = 0;
|
|
} else if (self->traceback->len + TRACEBACK_ENTRY_LEN > self->traceback->alloc) {
|
|
#if MICROPY_ENABLE_EMERGENCY_EXCEPTION_BUF
|
|
if (self->traceback->data == (size_t *)MP_STATE_VM(mp_emergency_exception_buf)) {
|
|
// Can't resize the emergency buffer
|
|
return;
|
|
}
|
|
#endif
|
|
// be conservative with growing traceback data
|
|
size_t *tb_data = m_renew_maybe(size_t, self->traceback->data, self->traceback->alloc,
|
|
self->traceback->alloc + TRACEBACK_ENTRY_LEN, true);
|
|
if (tb_data == NULL) {
|
|
return;
|
|
}
|
|
self->traceback->data = tb_data;
|
|
self->traceback->alloc += TRACEBACK_ENTRY_LEN;
|
|
}
|
|
|
|
size_t *tb_data = &self->traceback->data[self->traceback->len];
|
|
self->traceback->len += TRACEBACK_ENTRY_LEN;
|
|
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) {
|
|
mp_obj_exception_t *self = mp_obj_exception_get_native(self_in);
|
|
|
|
if (self->traceback == NULL) {
|
|
*n = 0;
|
|
*values = NULL;
|
|
} else {
|
|
*n = self->traceback->len;
|
|
*values = self->traceback->data;
|
|
}
|
|
}
|