mp_code_state_t *mp_obj_fun_bc_prepare_codestate(mp_obj_t self_in, size_t n_args, size_t n_kw, const mp_obj_t *args) {
MP_STACK_CHECK();
mp_obj_fun_bc_t *self = MP_OBJ_TO_PTR(self_in);
// get start of bytecode
const byte *ip = self->bytecode;
// bytecode prelude: state size and exception stack size
size_t n_state = mp_decode_uint(&ip);
size_t n_exc_stack = mp_decode_uint(&ip);
// allocate state for locals and stack
size_t state_size = n_state * sizeof(mp_obj_t) + n_exc_stack * sizeof(mp_exc_stack_t);
mp_code_state_t *code_state;
code_state = m_new_obj_var_maybe(mp_code_state_t, byte, state_size);
if (!code_state) {
return NULL;
}
code_state->ip = (byte*)(ip - self->bytecode); // offset to after n_state/n_exc_stack
code_state->n_state = n_state;
mp_setup_code_state(code_state, self, n_args, n_kw, args);
// execute the byte code with the correct globals context
code_state->old_globals = mp_globals_get();
mp_globals_set(self->globals);
return code_state;
}
mp_code_state *mp_obj_fun_bc_prepare_codestate(mp_obj_t self_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
MP_STACK_CHECK();
mp_obj_fun_bc_t *self = self_in;
// skip code-info block
const byte *code_info = self->bytecode;
mp_uint_t code_info_size = mp_decode_uint(&code_info);
const byte *ip = self->bytecode + code_info_size;
// bytecode prelude: skip arg names
ip += (self->n_pos_args + self->n_kwonly_args) * sizeof(mp_obj_t);
// bytecode prelude: state size and exception stack size
mp_uint_t n_state = mp_decode_uint(&ip);
mp_uint_t n_exc_stack = mp_decode_uint(&ip);
// allocate state for locals and stack
mp_uint_t state_size = n_state * sizeof(mp_obj_t) + n_exc_stack * sizeof(mp_exc_stack_t);
mp_code_state *code_state;
code_state = m_new_obj_var_maybe(mp_code_state, byte, state_size);
if (!code_state) {
return NULL;
}
code_state->n_state = n_state;
code_state->code_info = 0; // offset to code-info
code_state->ip = (byte*)(ip - self->bytecode); // offset to prelude
mp_setup_code_state(code_state, self_in, n_args, n_kw, args);
// execute the byte code with the correct globals context
code_state->old_globals = mp_globals_get();
mp_globals_set(self->globals);
return code_state;
}
STATIC void push_result_rule(parser_t *parser, int src_line, const rule_t *rule, int num_args) {
mp_parse_node_struct_t *pn = m_new_obj_var_maybe(mp_parse_node_struct_t, mp_parse_node_t, num_args);
if (pn == NULL) {
memory_error(parser);
return;
}
pn->source_line = src_line;
pn->kind_num_nodes = (rule->rule_id & 0xff) | (num_args << 8);
for (int i = num_args; i > 0; i--) {
pn->nodes[i - 1] = pop_result(parser);
}
push_result_node(parser, (mp_parse_node_t)pn);
}
STATIC void push_result_string(parser_t *parser, int src_line, const char *str, uint len) {
mp_parse_node_struct_t *pn = m_new_obj_var_maybe(mp_parse_node_struct_t, mp_parse_node_t, 2);
if (pn == NULL) {
memory_error(parser);
return;
}
pn->source_line = src_line;
pn->kind_num_nodes = RULE_string | (2 << 8);
char *p = m_new(char, len);
memcpy(p, str, len);
pn->nodes[0] = (machine_int_t)p;
pn->nodes[1] = len;
push_result_node(parser, (mp_parse_node_t)pn);
}
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);
mp_obj_exception_t *o = m_new_obj_var_maybe(mp_obj_exception_t, mp_obj_t, 0);
if (o == NULL) {
// Couldn't allocate heap memory; use local data instead.
o = &MP_STATE_VM(mp_emergency_exception_obj);
// We can't store any args.
o->args = (mp_obj_tuple_t*)&mp_const_empty_tuple_obj;
} else {
o->args = MP_OBJ_TO_PTR(mp_obj_new_tuple(n_args, args));
}
o->base.type = type;
o->traceback_data = NULL;
return MP_OBJ_FROM_PTR(o);
}
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_data = NULL;
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 >=
EMG_TRACEBACK_ALLOC * sizeof(size_t) + sizeof(mp_obj_tuple_t) + n_args * sizeof(mp_obj_t)) {
o_tuple = (mp_obj_tuple_t*)
((uint8_t*)MP_STATE_VM(mp_emergency_exception_buf) + EMG_TRACEBACK_ALLOC * sizeof(size_t));
}
#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);
}
mp_obj_t mp_obj_exception_make_new(mp_obj_t type_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
mp_obj_type_t *type = type_in;
if (n_kw != 0) {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "%s does not take keyword arguments", mp_obj_get_type_str(type_in)));
}
mp_obj_exception_t *o = m_new_obj_var_maybe(mp_obj_exception_t, mp_obj_t, 0);
if (o == NULL) {
// Couldn't allocate heap memory; use local data instead.
o = &mp_emergency_exception_obj;
// We can't store any args.
n_args = 0;
o->args = mp_const_empty_tuple;
} else {
o->args = mp_obj_new_tuple(n_args, args);
}
o->base.type = type;
o->traceback = MP_OBJ_NULL;
return o;
}
mp_obj_t mp_obj_new_exception_msg_varg(const mp_obj_type_t *exc_type, const char *fmt, ...) {
// check that the given type is an exception type
assert(exc_type->make_new == mp_obj_exception_make_new);
// make exception object
mp_obj_exception_t *o = m_new_obj_var_maybe(mp_obj_exception_t, mp_obj_t, 0);
if (o == NULL) {
// Couldn't allocate heap memory; use local data instead.
// Unfortunately, we won't be able to format the string...
o = &mp_emergency_exception_obj;
o->base.type = exc_type;
o->traceback = MP_OBJ_NULL;
o->args = mp_const_empty_tuple;
} else {
o->base.type = exc_type;
o->traceback = MP_OBJ_NULL;
o->args = mp_obj_new_tuple(1, NULL);
if (fmt == NULL) {
// no message
assert(0);
} else {
// render exception message and store as .args[0]
// TODO: optimize bufferbloat
vstr_t *vstr = vstr_new();
va_list ap;
va_start(ap, fmt);
vstr_vprintf(vstr, fmt, ap);
va_end(ap);
o->args->items[0] = mp_obj_new_str((byte*)vstr->buf, vstr->len, false);
vstr_free(vstr);
}
}
return o;
}
mp_obj_t mp_obj_new_exception_msg_varg(const mp_obj_type_t *exc_type, const char *fmt, ...) {
// check that the given type is an exception type
assert(exc_type->make_new == mp_obj_exception_make_new);
// make exception object
mp_obj_exception_t *o = m_new_obj_var_maybe(mp_obj_exception_t, mp_obj_t, 0);
if (o == NULL) {
// Couldn't allocate heap memory; use local data instead.
// Unfortunately, we won't be able to format the string...
o = &mp_emergency_exception_obj;
o->base.type = exc_type;
o->traceback = MP_OBJ_NULL;
o->args = mp_const_empty_tuple;
#if MICROPY_ENABLE_EMERGENCY_EXCEPTION_BUF
// If the user has provided a buffer, then we try to create a tuple
// of length 1, which has a string object and the string data.
if (mp_emergency_exception_buf_size > (sizeof(mp_obj_tuple_t) + sizeof(mp_obj_str_t) + sizeof(mp_obj_t))) {
mp_obj_tuple_t *tuple = (mp_obj_tuple_t *)mp_emergency_exception_buf;
mp_obj_str_t *str = (mp_obj_str_t *)&tuple->items[1];
tuple->base.type = &mp_type_tuple;
tuple->len = 1;
tuple->items[0] = str;
byte *str_data = (byte *)&str[1];
uint max_len = mp_emergency_exception_buf + mp_emergency_exception_buf_size
- str_data;
va_list ap;
va_start(ap, fmt);
str->len = vsnprintf((char *)str_data, max_len, fmt, ap);
va_end(ap);
str->base.type = &mp_type_str;
str->hash = qstr_compute_hash(str_data, str->len);
str->data = str_data;
o->args = tuple;
uint offset = &str_data[str->len] - mp_emergency_exception_buf;
offset += sizeof(void *) - 1;
offset &= ~(sizeof(void *) - 1);
if ((mp_emergency_exception_buf_size - offset) > (sizeof(mp_obj_list_t) + sizeof(mp_obj_t) * 3)) {
// We have room to store some traceback.
mp_obj_list_t *list = (mp_obj_list_t *)((byte *)mp_emergency_exception_buf + offset);
list->base.type = &mp_type_list;
list->items = (mp_obj_t)&list[1];
list->alloc = (mp_emergency_exception_buf + mp_emergency_exception_buf_size - (byte *)list->items) / sizeof(list->items[0]);
list->len = 0;
o->traceback = list;
}
}
#endif // MICROPY_ENABLE_EMERGENCY_EXCEPTION_BUF
} else {
o->base.type = exc_type;
o->traceback = MP_OBJ_NULL;
o->args = mp_obj_new_tuple(1, NULL);
if (fmt == NULL) {
// no message
assert(0);
} else {
// render exception message and store as .args[0]
// TODO: optimize bufferbloat
vstr_t *vstr = vstr_new();
va_list ap;
va_start(ap, fmt);
vstr_vprintf(vstr, fmt, ap);
va_end(ap);
o->args->items[0] = mp_obj_new_str(vstr->buf, vstr->len, false);
vstr_free(vstr);
}
}
return o;
}
STATIC mp_obj_t fun_bc_call(mp_obj_t self_in, size_t n_args, size_t n_kw, const mp_obj_t *args) {
MP_STACK_CHECK();
DEBUG_printf("Input n_args: " UINT_FMT ", n_kw: " UINT_FMT "\n", n_args, n_kw);
DEBUG_printf("Input pos args: ");
dump_args(args, n_args);
DEBUG_printf("Input kw args: ");
dump_args(args + n_args, n_kw * 2);
mp_obj_fun_bc_t *self = MP_OBJ_TO_PTR(self_in);
DEBUG_printf("Func n_def_args: %d\n", self->n_def_args);
// get start of bytecode
const byte *ip = self->bytecode;
// bytecode prelude: state size and exception stack size
mp_uint_t n_state = mp_decode_uint(&ip);
mp_uint_t n_exc_stack = mp_decode_uint(&ip);
#if VM_DETECT_STACK_OVERFLOW
n_state += 1;
#endif
// allocate state for locals and stack
mp_uint_t state_size = n_state * sizeof(mp_obj_t) + n_exc_stack * sizeof(mp_exc_stack_t);
mp_code_state_t *code_state = NULL;
if (state_size > VM_MAX_STATE_ON_STACK) {
code_state = m_new_obj_var_maybe(mp_code_state_t, byte, state_size);
}
if (code_state == NULL) {
code_state = alloca(sizeof(mp_code_state_t) + state_size);
state_size = 0; // indicate that we allocated using alloca
}
code_state->ip = (byte*)(ip - self->bytecode); // offset to after n_state/n_exc_stack
code_state->n_state = n_state;
mp_setup_code_state(code_state, self, n_args, n_kw, args);
// execute the byte code with the correct globals context
code_state->old_globals = mp_globals_get();
mp_globals_set(self->globals);
mp_vm_return_kind_t vm_return_kind = mp_execute_bytecode(code_state, MP_OBJ_NULL);
mp_globals_set(code_state->old_globals);
#if VM_DETECT_STACK_OVERFLOW
if (vm_return_kind == MP_VM_RETURN_NORMAL) {
if (code_state->sp < code_state->state) {
printf("VM stack underflow: " INT_FMT "\n", code_state->sp - code_state->state);
assert(0);
}
}
// We can't check the case when an exception is returned in state[n_state - 1]
// and there are no arguments, because in this case our detection slot may have
// been overwritten by the returned exception (which is allowed).
if (!(vm_return_kind == MP_VM_RETURN_EXCEPTION && self->n_pos_args + self->n_kwonly_args == 0)) {
// Just check to see that we have at least 1 null object left in the state.
bool overflow = true;
for (mp_uint_t i = 0; i < n_state - self->n_pos_args - self->n_kwonly_args; i++) {
if (code_state->state[i] == MP_OBJ_NULL) {
overflow = false;
break;
}
}
if (overflow) {
printf("VM stack overflow state=%p n_state+1=" UINT_FMT "\n", code_state->state, n_state);
assert(0);
}
}
#endif
mp_obj_t result;
if (vm_return_kind == MP_VM_RETURN_NORMAL) {
// return value is in *sp
result = *code_state->sp;
} else {
// must be an exception because normal functions can't yield
assert(vm_return_kind == MP_VM_RETURN_EXCEPTION);
// return value is in fastn[0]==state[n_state - 1]
result = code_state->state[n_state - 1];
}
// free the state if it was allocated on the heap
if (state_size != 0) {
m_del_var(mp_code_state_t, byte, state_size, code_state);
}
if (vm_return_kind == MP_VM_RETURN_NORMAL) {
return result;
} else { // MP_VM_RETURN_EXCEPTION
nlr_raise(result);
}
}
mp_obj_t mp_obj_new_exception_msg_varg(const mp_obj_type_t *exc_type, const char *fmt, ...) {
// check that the given type is an exception type
assert(exc_type->make_new == mp_obj_exception_make_new);
// make exception object
mp_obj_exception_t *o = m_new_obj_var_maybe(mp_obj_exception_t, mp_obj_t, 0);
if (o == NULL) {
// Couldn't allocate heap memory; use local data instead.
// Unfortunately, we won't be able to format the string...
o = &MP_STATE_VM(mp_emergency_exception_obj);
o->base.type = exc_type;
o->traceback_data = NULL;
o->args = (mp_obj_tuple_t*)&mp_const_empty_tuple_obj;
#if MICROPY_ENABLE_EMERGENCY_EXCEPTION_BUF
// If the user has provided a buffer, then we try to create a tuple
// of length 1, which has a string object and the string data.
if (mp_emergency_exception_buf_size > (sizeof(mp_obj_tuple_t) + sizeof(mp_obj_str_t) + sizeof(mp_obj_t))) {
mp_obj_tuple_t *tuple = (mp_obj_tuple_t *)MP_STATE_VM(mp_emergency_exception_buf);
mp_obj_str_t *str = (mp_obj_str_t *)&tuple->items[1];
tuple->base.type = &mp_type_tuple;
tuple->len = 1;
tuple->items[0] = MP_OBJ_FROM_PTR(str);
byte *str_data = (byte *)&str[1];
uint max_len = MP_STATE_VM(mp_emergency_exception_buf) + mp_emergency_exception_buf_size
- str_data;
vstr_t vstr;
vstr_init_fixed_buf(&vstr, max_len, (char *)str_data);
va_list ap;
va_start(ap, fmt);
vstr_vprintf(&vstr, fmt, ap);
va_end(ap);
str->base.type = &mp_type_str;
str->hash = qstr_compute_hash(str_data, str->len);
str->len = vstr.len;
str->data = str_data;
o->args = tuple;
uint offset = &str_data[str->len] - MP_STATE_VM(mp_emergency_exception_buf);
offset += sizeof(void *) - 1;
offset &= ~(sizeof(void *) - 1);
if ((mp_emergency_exception_buf_size - offset) > (sizeof(o->traceback_data[0]) * 3)) {
// We have room to store some traceback.
o->traceback_data = (size_t*)((byte *)MP_STATE_VM(mp_emergency_exception_buf) + offset);
o->traceback_alloc = (MP_STATE_VM(mp_emergency_exception_buf) + mp_emergency_exception_buf_size - (byte *)o->traceback_data) / sizeof(o->traceback_data[0]);
o->traceback_len = 0;
}
}
#endif // MICROPY_ENABLE_EMERGENCY_EXCEPTION_BUF
} else {
o->base.type = exc_type;
o->traceback_data = NULL;
o->args = MP_OBJ_TO_PTR(mp_obj_new_tuple(1, NULL));
assert(fmt != NULL);
{
if (strchr(fmt, '%') == NULL) {
// no formatting substitutions, avoid allocating vstr.
o->args->items[0] = mp_obj_new_str(fmt, strlen(fmt), false);
} else {
// render exception message and store as .args[0]
va_list ap;
vstr_t vstr;
vstr_init(&vstr, 16);
va_start(ap, fmt);
vstr_vprintf(&vstr, fmt, ap);
va_end(ap);
o->args->items[0] = mp_obj_new_str_from_vstr(&mp_type_str, &vstr);
}
}
}
return MP_OBJ_FROM_PTR(o);
}
