/* * This file is part of the MicroPython project, http://micropython.org/ * * The MIT License (MIT) * * SPDX-FileCopyrightText: Copyright (c) 2013, 2014 Damien P. George * SPDX-FileCopyrightText: Copyright (c) 2014-2016 Paul Sokolovsky * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #include #include #include #include #include "py/objlist.h" #include "py/objnamedtuple.h" #include "py/objstr.h" #include "py/objtuple.h" #include "py/objtype.h" #include "py/runtime.h" #include "py/gc.h" #include "py/mperrno.h" #include "supervisor/shared/translate/translate.h" // Number of items per traceback entry (file, line, block) #define TRACEBACK_ENTRY_LEN (3) // Optionally allocated buffer for storing some traceback, the tuple argument, // and possible string object and data, for when the heap is locked. #if MICROPY_ENABLE_EMERGENCY_EXCEPTION_BUF // When used the layout of the emergency exception buffer is: // - traceback entry (file, line, block) // - traceback entry (file, line, block) // - mp_obj_tuple_t object // - n_args * mp_obj_t for tuple // - mp_obj_str_t object // - string data #define EMG_BUF_TRACEBACK_OFFSET (0) #define EMG_BUF_TRACEBACK_SIZE (2 * TRACEBACK_ENTRY_LEN * sizeof(size_t)) #define EMG_BUF_TUPLE_OFFSET (EMG_BUF_TRACEBACK_OFFSET + EMG_BUF_TRACEBACK_SIZE) #define EMG_BUF_TUPLE_SIZE(n_args) (sizeof(mp_obj_tuple_t) + n_args * sizeof(mp_obj_t)) #define EMG_BUF_STR_OFFSET (EMG_BUF_TUPLE_OFFSET + EMG_BUF_TUPLE_SIZE(1)) #define EMG_BUF_STR_BUF_OFFSET (EMG_BUF_STR_OFFSET + sizeof(mp_obj_str_t)) #if MICROPY_EMERGENCY_EXCEPTION_BUF_SIZE > 0 #define mp_emergency_exception_buf_size MICROPY_EMERGENCY_EXCEPTION_BUF_SIZE void mp_init_emergency_exception_buf(void) { // Nothing to do since the buffer was declared statically. We put this // definition here so that the calling code can call this function // regardless of how its configured (makes the calling code a bit cleaner). } #else #define mp_emergency_exception_buf_size MP_STATE_VM(mp_emergency_exception_buf_size) void mp_init_emergency_exception_buf(void) { mp_emergency_exception_buf_size = 0; MP_STATE_VM(mp_emergency_exception_buf) = NULL; } mp_obj_t mp_alloc_emergency_exception_buf(mp_obj_t size_in) { mp_int_t size = mp_obj_get_int(size_in); void *buf = NULL; if (size > 0) { buf = m_new(byte, size); } int old_size = mp_emergency_exception_buf_size; void *old_buf = MP_STATE_VM(mp_emergency_exception_buf); // Update the 2 variables atomically so that an interrupt can't occur // between the assignments. mp_uint_t atomic_state = MICROPY_BEGIN_ATOMIC_SECTION(); mp_emergency_exception_buf_size = size; MP_STATE_VM(mp_emergency_exception_buf) = buf; MICROPY_END_ATOMIC_SECTION(atomic_state); if (old_buf != NULL) { m_del(byte, old_buf, old_size); } return mp_const_none; } #endif #endif // MICROPY_ENABLE_EMERGENCY_EXCEPTION_BUF mp_obj_exception_t *mp_obj_exception_get_native(mp_obj_t self_in) { assert(mp_obj_is_exception_instance(self_in)); if (mp_obj_is_native_exception_instance(self_in)) { return MP_OBJ_TO_PTR(self_in); } else { return MP_OBJ_TO_PTR(((mp_obj_instance_t *)MP_OBJ_TO_PTR(self_in))->subobj[0]); } } void mp_obj_exception_print(const mp_print_t *print, mp_obj_t o_in, mp_print_kind_t kind) { mp_obj_exception_t *o = MP_OBJ_TO_PTR(o_in); mp_print_kind_t k = kind & ~PRINT_EXC_SUBCLASS; bool is_subclass = kind & PRINT_EXC_SUBCLASS; if (!is_subclass && (k == PRINT_REPR || k == PRINT_EXC)) { mp_print_str(print, qstr_str(o->base.type->name)); } if (k == PRINT_EXC) { mp_print_str(print, ": "); } if (k == PRINT_STR || k == PRINT_EXC) { if (o->args == NULL || o->args->len == 0) { mp_print_str(print, ""); return; } #if MICROPY_PY_UERRNO // try to provide a nice OSError error message if (o->base.type == &mp_type_OSError && o->args->len > 0 && o->args->len < 3 && mp_obj_is_small_int(o->args->items[0])) { char decompressed[50]; const char *msg = mp_common_errno_to_str(o->args->items[0], decompressed, sizeof(decompressed)); if (msg != NULL) { mp_printf(print, "[Errno " INT_FMT "] %s", MP_OBJ_SMALL_INT_VALUE(o->args->items[0]), msg); if (o->args->len > 1) { mp_print_str(print, ": "); mp_obj_print_helper(print, o->args->items[1], PRINT_STR); } return; } } #endif if (o->args->len == 1) { mp_obj_print_helper(print, o->args->items[0], PRINT_STR); return; } } mp_obj_tuple_print(print, MP_OBJ_FROM_PTR(o->args), kind); } 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) { mp_arg_check_num(n_args, n_kw, 0, MP_OBJ_FUN_ARGS_MAX, false); // Try to allocate memory for the exception, with fallback to emergency exception object mp_obj_exception_t *o_exc = m_new_obj_maybe(mp_obj_exception_t); if (o_exc == NULL) { o_exc = &MP_STATE_VM(mp_emergency_exception_obj); } // Populate the exception object o_exc->base.type = type; o_exc->traceback = (mp_obj_traceback_t *)&mp_const_empty_traceback_obj; mp_obj_tuple_t *o_tuple; if (n_args == 0) { // No args, can use the empty tuple straightaway o_tuple = (mp_obj_tuple_t *)&mp_const_empty_tuple_obj; } else { // Try to allocate memory for the tuple containing the args o_tuple = m_new_obj_var_maybe(mp_obj_tuple_t, mp_obj_t, n_args); #if MICROPY_ENABLE_EMERGENCY_EXCEPTION_BUF // If we are called by mp_obj_new_exception_msg_varg then it will have // reserved room (after the traceback data) for a tuple with 1 element. // Otherwise we are free to use the whole buffer after the traceback data. if (o_tuple == NULL && mp_emergency_exception_buf_size >= (mp_int_t)(EMG_BUF_TUPLE_OFFSET + EMG_BUF_TUPLE_SIZE(n_args))) { o_tuple = (mp_obj_tuple_t *) ((uint8_t *)MP_STATE_VM(mp_emergency_exception_buf) + EMG_BUF_TUPLE_OFFSET); } #endif if (o_tuple == NULL) { // No memory for a tuple, fallback to an empty tuple o_tuple = (mp_obj_tuple_t *)&mp_const_empty_tuple_obj; } else { // Have memory for a tuple so populate it o_tuple->base.type = &mp_type_tuple; o_tuple->len = n_args; memcpy(o_tuple->items, args, n_args * sizeof(mp_obj_t)); } } // Store the tuple of args in the exception object o_exc->args = o_tuple; return MP_OBJ_FROM_PTR(o_exc); } // Get exception "value" - that is, first argument, or None mp_obj_t mp_obj_exception_get_value(mp_obj_t self_in) { mp_obj_exception_t *self = mp_obj_exception_get_native(self_in); if (self->args->len == 0) { return mp_const_none; } else { return self->args->items[0]; } } void mp_obj_exception_attr(mp_obj_t self_in, qstr attr, mp_obj_t *dest) { mp_obj_exception_t *self = MP_OBJ_TO_PTR(self_in); if (dest[0] != MP_OBJ_NULL) { // store/delete attribute if (self == &mp_const_GeneratorExit_obj) { mp_raise_AttributeError(MP_ERROR_TEXT("can't set attribute")); } if (attr == MP_QSTR___traceback__) { if (dest[1] == mp_const_none) { self->traceback = (mp_obj_traceback_t *)&mp_const_empty_traceback_obj; } else { if (!mp_obj_is_type(dest[1], &mp_type_traceback)) { mp_raise_TypeError(MP_ERROR_TEXT("invalid traceback")); } self->traceback = MP_OBJ_TO_PTR(dest[1]); } dest[0] = MP_OBJ_NULL; // indicate success } return; } if (attr == MP_QSTR_args) { dest[0] = MP_OBJ_FROM_PTR(self->args); } else if (attr == MP_QSTR_value && self->base.type == &mp_type_StopIteration) { dest[0] = mp_obj_exception_get_value(self_in); } else if (attr == MP_QSTR___traceback__) { dest[0] = (self->traceback) ? MP_OBJ_FROM_PTR(self->traceback) : mp_const_none; #if MICROPY_CPYTHON_COMPAT } else if (mp_obj_is_subclass_fast(MP_OBJ_FROM_PTR(self->base.type), MP_OBJ_FROM_PTR(&mp_type_OSError))) { if (attr == MP_QSTR_errno) { dest[0] = mp_obj_exception_get_value(self_in); } else if (attr == MP_QSTR_strerror) { if (self->args->len > 1) { dest[0] = self->args->items[1]; } else if (self->args->len > 0) { char decompressed[50]; const char *msg = mp_common_errno_to_str(self->args->items[0], decompressed, sizeof(decompressed)); if (msg != NULL) { dest[0] = mp_obj_new_str(msg, strlen(msg)); } else { dest[0] = mp_const_none; } } else { dest[0] = mp_const_none; } } else if (attr == MP_QSTR_filename) { dest[0] = self->args->len > 2 ? self->args->items[2] : mp_const_none; // skip winerror } else if (attr == MP_QSTR_filename2) { dest[0] = self->args->len > 4 ? self->args->items[4] : mp_const_none; } #endif } } const mp_obj_type_t mp_type_BaseException = { { &mp_type_type }, .name = MP_QSTR_BaseException, .print = mp_obj_exception_print, .make_new = mp_obj_exception_make_new, .attr = mp_obj_exception_attr, }; // *FORMAT-OFF* // List of all exceptions, arranged as in the table at: // http://docs.python.org/3/library/exceptions.html MP_DEFINE_EXCEPTION(SystemExit, BaseException) MP_DEFINE_EXCEPTION(KeyboardInterrupt, BaseException) MP_DEFINE_EXCEPTION(ReloadException, BaseException) MP_DEFINE_EXCEPTION(GeneratorExit, BaseException) MP_DEFINE_EXCEPTION(Exception, BaseException) #if MICROPY_PY_ASYNC_AWAIT MP_DEFINE_EXCEPTION(StopAsyncIteration, Exception) #endif MP_DEFINE_EXCEPTION(StopIteration, Exception) MP_DEFINE_EXCEPTION(ArithmeticError, Exception) // MP_DEFINE_EXCEPTION(FloatingPointError, ArithmeticError) MP_DEFINE_EXCEPTION(OverflowError, ArithmeticError) MP_DEFINE_EXCEPTION(ZeroDivisionError, ArithmeticError) MP_DEFINE_EXCEPTION(AssertionError, Exception) MP_DEFINE_EXCEPTION(AttributeError, Exception) // MP_DEFINE_EXCEPTION(BufferError, Exception) // MP_DEFINE_EXCEPTION(EnvironmentError, Exception) use OSError instead MP_DEFINE_EXCEPTION(EOFError, Exception) MP_DEFINE_EXCEPTION(ImportError, Exception) // MP_DEFINE_EXCEPTION(IOError, Exception) use OSError instead 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(TimeoutError, 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(BlockingIOError, OSError) MP_DEFINE_EXCEPTION(ChildProcessError, OSError) 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(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(exc_type->make_new == mp_obj_exception_make_new); return exc_type->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); } #endif // 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 ap; va_start(ap, fmt); mp_obj_t exception = mp_obj_new_exception_msg_vlist(exc_type, fmt, ap); va_end(ap); return exception; } 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(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; 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); } 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(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); } // 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 (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 = mp_obj_exception_get_native(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; } void mp_obj_exception_add_traceback(mp_obj_t self_in, qstr file, size_t line, qstr block) { mp_obj_exception_t *self = mp_obj_exception_get_native(self_in); // 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; } } #if MICROPY_PY_SYS_EXC_INFO STATIC const mp_obj_namedtuple_type_t code_type_obj = { .base = { .base = { .type = &mp_type_type }, .flags = MP_TYPE_FLAG_EXTENDED, .name = MP_QSTR_code, .print = namedtuple_print, .make_new = namedtuple_make_new, .parent = &mp_type_tuple, .attr = namedtuple_attr, MP_TYPE_EXTENDED_FIELDS( .unary_op = mp_obj_tuple_unary_op, .binary_op = mp_obj_tuple_binary_op, .subscr = mp_obj_tuple_subscr, .getiter = mp_obj_tuple_getiter, ), }, .n_fields = 15, .fields = { MP_QSTR_co_argcount, MP_QSTR_co_kwonlyargcount, MP_QSTR_co_nlocals, MP_QSTR_co_stacksize, MP_QSTR_co_flags, MP_QSTR_co_code, MP_QSTR_co_consts, MP_QSTR_co_names, MP_QSTR_co_varnames, MP_QSTR_co_freevars, MP_QSTR_co_cellvars, MP_QSTR_co_filename, MP_QSTR_co_name, MP_QSTR_co_firstlineno, MP_QSTR_co_lnotab, }, }; STATIC mp_obj_t code_make_new(qstr file, qstr block) { mp_obj_t elems[15] = { mp_obj_new_int(0), // co_argcount mp_obj_new_int(0), // co_kwonlyargcount mp_obj_new_int(0), // co_nlocals mp_obj_new_int(0), // co_stacksize mp_obj_new_int(0), // co_flags mp_obj_new_bytearray(0, NULL), // co_code mp_obj_new_tuple(0, NULL), // co_consts mp_obj_new_tuple(0, NULL), // co_names mp_obj_new_tuple(0, NULL), // co_varnames mp_obj_new_tuple(0, NULL), // co_freevars mp_obj_new_tuple(0, NULL), // co_cellvars MP_OBJ_NEW_QSTR(file), // co_filename MP_OBJ_NEW_QSTR(block), // co_name mp_obj_new_int(1), // co_firstlineno mp_obj_new_bytearray(0, NULL), // co_lnotab }; return namedtuple_make_new((const mp_obj_type_t *)&code_type_obj, 15, 0, elems); } STATIC const mp_obj_namedtuple_type_t frame_type_obj = { .base = { .base = { .type = &mp_type_type }, .name = MP_QSTR_frame, .print = namedtuple_print, .make_new = namedtuple_make_new, .parent = &mp_type_tuple, .attr = namedtuple_attr, MP_TYPE_EXTENDED_FIELDS( .unary_op = mp_obj_tuple_unary_op, .binary_op = mp_obj_tuple_binary_op, .subscr = mp_obj_tuple_subscr, .getiter = mp_obj_tuple_getiter, ), }, .n_fields = 8, .fields = { MP_QSTR_f_back, MP_QSTR_f_builtins, MP_QSTR_f_code, MP_QSTR_f_globals, MP_QSTR_f_lasti, MP_QSTR_f_lineno, MP_QSTR_f_locals, MP_QSTR_f_trace, }, }; STATIC mp_obj_t frame_make_new(mp_obj_t f_code, int f_lineno) { mp_obj_t elems[8] = { mp_const_none, // f_back mp_obj_new_dict(0), // f_builtins f_code, // f_code mp_obj_new_dict(0), // f_globals mp_obj_new_int(0), // f_lasti mp_obj_new_int(f_lineno), // f_lineno mp_obj_new_dict(0), // f_locals mp_const_none, // f_trace }; return namedtuple_make_new((const mp_obj_type_t *)&frame_type_obj, 8, 0, elems); } STATIC const mp_obj_namedtuple_type_t traceback_type_obj = { .base = { .base = { .type = &mp_type_type }, .flags = MP_TYPE_FLAG_EXTENDED, .name = MP_QSTR_traceback, .print = namedtuple_print, .make_new = namedtuple_make_new, .parent = &mp_type_tuple, .attr = namedtuple_attr, MP_TYPE_EXTENDED_FIELDS( .unary_op = mp_obj_tuple_unary_op, .binary_op = mp_obj_tuple_binary_op, .subscr = mp_obj_tuple_subscr, .getiter = mp_obj_tuple_getiter, ), }, .n_fields = 4, .fields = { MP_QSTR_tb_frame, MP_QSTR_tb_lasti, MP_QSTR_tb_lineno, MP_QSTR_tb_next, }, }; STATIC mp_obj_t traceback_from_values(size_t *values, mp_obj_t tb_next) { int lineno = values[1]; mp_obj_t elems[4] = { frame_make_new(code_make_new(values[0], values[2]), lineno), mp_obj_new_int(0), mp_obj_new_int(lineno), tb_next, }; return namedtuple_make_new((const mp_obj_type_t *)&traceback_type_obj, 4, 0, elems); }; mp_obj_t mp_obj_exception_get_traceback_obj(mp_obj_t self_in) { mp_obj_exception_t *self = MP_OBJ_TO_PTR(self_in); if (!mp_obj_is_exception_instance(self)) { return mp_const_none; } size_t n, *values; mp_obj_exception_get_traceback(self, &n, &values); if (n == 0) { return mp_const_none; } mp_obj_t tb_next = mp_const_none; for (size_t i = 0; i < n; i += 3) { tb_next = traceback_from_values(&values[i], tb_next); } return tb_next; } #endif