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532 lines
19 KiB
532 lines
19 KiB
/*
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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 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 <assert.h>
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#include "py/objtuple.h"
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#include "py/objfun.h"
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#include "py/runtime.h"
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#include "py/bc.h"
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#include "py/stackctrl.h"
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#if MICROPY_DEBUG_VERBOSE // print debugging info
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#define DEBUG_PRINT (1)
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#else // don't print debugging info
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#define DEBUG_PRINT (0)
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#define DEBUG_printf(...) (void)0
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#endif
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// Note: the "name" entry in mp_obj_type_t for a function type must be
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// MP_QSTR_function because it is used to determine if an object is of generic
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// function type.
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/******************************************************************************/
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/* builtin functions */
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STATIC mp_obj_t fun_builtin_0_call(mp_obj_t self_in, size_t n_args, size_t n_kw, const mp_obj_t *args) {
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(void)args;
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assert(mp_obj_is_type(self_in, &mp_type_fun_builtin_0));
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mp_obj_fun_builtin_fixed_t *self = MP_OBJ_TO_PTR(self_in);
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mp_arg_check_num(n_args, n_kw, 0, 0, false);
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return self->fun._0();
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}
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const mp_obj_type_t mp_type_fun_builtin_0 = {
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{ &mp_type_type },
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.name = MP_QSTR_function,
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.call = fun_builtin_0_call,
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.unary_op = mp_generic_unary_op,
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};
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STATIC mp_obj_t fun_builtin_1_call(mp_obj_t self_in, size_t n_args, size_t n_kw, const mp_obj_t *args) {
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assert(mp_obj_is_type(self_in, &mp_type_fun_builtin_1));
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mp_obj_fun_builtin_fixed_t *self = MP_OBJ_TO_PTR(self_in);
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mp_arg_check_num(n_args, n_kw, 1, 1, false);
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return self->fun._1(args[0]);
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}
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const mp_obj_type_t mp_type_fun_builtin_1 = {
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{ &mp_type_type },
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.name = MP_QSTR_function,
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.call = fun_builtin_1_call,
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.unary_op = mp_generic_unary_op,
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};
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STATIC mp_obj_t fun_builtin_2_call(mp_obj_t self_in, size_t n_args, size_t n_kw, const mp_obj_t *args) {
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assert(mp_obj_is_type(self_in, &mp_type_fun_builtin_2));
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mp_obj_fun_builtin_fixed_t *self = MP_OBJ_TO_PTR(self_in);
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mp_arg_check_num(n_args, n_kw, 2, 2, false);
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return self->fun._2(args[0], args[1]);
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}
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const mp_obj_type_t mp_type_fun_builtin_2 = {
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{ &mp_type_type },
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.name = MP_QSTR_function,
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.call = fun_builtin_2_call,
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.unary_op = mp_generic_unary_op,
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};
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STATIC mp_obj_t fun_builtin_3_call(mp_obj_t self_in, size_t n_args, size_t n_kw, const mp_obj_t *args) {
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assert(mp_obj_is_type(self_in, &mp_type_fun_builtin_3));
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mp_obj_fun_builtin_fixed_t *self = MP_OBJ_TO_PTR(self_in);
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mp_arg_check_num(n_args, n_kw, 3, 3, false);
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return self->fun._3(args[0], args[1], args[2]);
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}
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const mp_obj_type_t mp_type_fun_builtin_3 = {
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{ &mp_type_type },
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.name = MP_QSTR_function,
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.call = fun_builtin_3_call,
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.unary_op = mp_generic_unary_op,
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};
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STATIC mp_obj_t fun_builtin_var_call(mp_obj_t self_in, size_t n_args, size_t n_kw, const mp_obj_t *args) {
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assert(mp_obj_is_type(self_in, &mp_type_fun_builtin_var));
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mp_obj_fun_builtin_var_t *self = MP_OBJ_TO_PTR(self_in);
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// check number of arguments
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mp_arg_check_num_sig(n_args, n_kw, self->sig);
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if (self->sig & 1) {
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// function allows keywords
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// we create a map directly from the given args array
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mp_map_t kw_args;
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mp_map_init_fixed_table(&kw_args, n_kw, args + n_args);
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return self->fun.kw(n_args, args, &kw_args);
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} else {
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// function takes a variable number of arguments, but no keywords
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return self->fun.var(n_args, args);
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}
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}
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const mp_obj_type_t mp_type_fun_builtin_var = {
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{ &mp_type_type },
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.name = MP_QSTR_function,
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.call = fun_builtin_var_call,
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.unary_op = mp_generic_unary_op,
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};
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/******************************************************************************/
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/* byte code functions */
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qstr mp_obj_code_get_name(const byte *code_info) {
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code_info = mp_decode_uint_skip(code_info); // skip code_info_size entry
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#if MICROPY_PERSISTENT_CODE
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return code_info[0] | (code_info[1] << 8);
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#else
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return mp_decode_uint_value(code_info);
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#endif
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}
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#if MICROPY_EMIT_NATIVE
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STATIC const mp_obj_type_t mp_type_fun_native;
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#endif
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qstr mp_obj_fun_get_name(mp_const_obj_t fun_in) {
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const mp_obj_fun_bc_t *fun = MP_OBJ_TO_PTR(fun_in);
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#if MICROPY_EMIT_NATIVE
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if (fun->base.type == &mp_type_fun_native || fun->base.type == &mp_type_native_gen_wrap) {
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// TODO native functions don't have name stored
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return MP_QSTR_;
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}
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#endif
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const byte *bc = fun->bytecode;
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bc = mp_decode_uint_skip(bc); // skip n_state
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bc = mp_decode_uint_skip(bc); // skip n_exc_stack
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bc++; // skip scope_params
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bc++; // skip n_pos_args
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bc++; // skip n_kwonly_args
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bc++; // skip n_def_pos_args
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return mp_obj_code_get_name(bc);
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}
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#if MICROPY_CPYTHON_COMPAT
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STATIC void fun_bc_print(const mp_print_t *print, mp_obj_t o_in, mp_print_kind_t kind) {
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(void)kind;
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mp_obj_fun_bc_t *o = MP_OBJ_TO_PTR(o_in);
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mp_printf(print, "<function %q at 0x%p>", mp_obj_fun_get_name(o_in), o);
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}
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#endif
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#if DEBUG_PRINT
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STATIC void dump_args(const mp_obj_t *a, size_t sz) {
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DEBUG_printf("%p: ", a);
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for (size_t i = 0; i < sz; i++) {
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DEBUG_printf("%p ", a[i]);
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}
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DEBUG_printf("\n");
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}
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#else
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#define dump_args(...) (void)0
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#endif
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// With this macro you can tune the maximum number of function state bytes
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// that will be allocated on the stack. Any function that needs more
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// than this will try to use the heap, with fallback to stack allocation.
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#define VM_MAX_STATE_ON_STACK (11 * sizeof(mp_uint_t))
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#define DECODE_CODESTATE_SIZE(bytecode, n_state_out_var, state_size_out_var) \
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{ \
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/* bytecode prelude: state size and exception stack size */ \
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n_state_out_var = mp_decode_uint_value(bytecode); \
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size_t n_exc_stack = mp_decode_uint_value(mp_decode_uint_skip(bytecode)); \
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\
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/* state size in bytes */ \
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state_size_out_var = n_state_out_var * sizeof(mp_obj_t) \
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+ n_exc_stack * sizeof(mp_exc_stack_t); \
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}
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#define INIT_CODESTATE(code_state, _fun_bc, n_args, n_kw, args) \
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code_state->fun_bc = _fun_bc; \
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code_state->ip = 0; \
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mp_setup_code_state(code_state, n_args, n_kw, args); \
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code_state->old_globals = mp_globals_get();
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#if MICROPY_STACKLESS
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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) {
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MP_STACK_CHECK();
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mp_obj_fun_bc_t *self = MP_OBJ_TO_PTR(self_in);
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size_t n_state, state_size;
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DECODE_CODESTATE_SIZE(self->bytecode, n_state, state_size);
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mp_code_state_t *code_state;
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#if MICROPY_ENABLE_PYSTACK
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code_state = mp_pystack_alloc(sizeof(mp_code_state_t) + state_size);
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#else
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// If we use m_new_obj_var(), then on no memory, MemoryError will be
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// raised. But this is not correct exception for a function call,
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// RuntimeError should be raised instead. So, we use m_new_obj_var_maybe(),
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// return NULL, then vm.c takes the needed action (either raise
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// RuntimeError or fallback to stack allocation).
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code_state = m_new_obj_var_maybe(mp_code_state_t, byte, state_size);
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if (!code_state) {
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return NULL;
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}
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#endif
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INIT_CODESTATE(code_state, self, n_args, n_kw, args);
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// execute the byte code with the correct globals context
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mp_globals_set(self->globals);
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return code_state;
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}
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#endif
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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) {
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MP_STACK_CHECK();
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DEBUG_printf("Input n_args: " UINT_FMT ", n_kw: " UINT_FMT "\n", n_args, n_kw);
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DEBUG_printf("Input pos args: ");
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dump_args(args, n_args);
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DEBUG_printf("Input kw args: ");
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dump_args(args + n_args, n_kw * 2);
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mp_obj_fun_bc_t *self = MP_OBJ_TO_PTR(self_in);
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size_t n_state, state_size;
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DECODE_CODESTATE_SIZE(self->bytecode, n_state, state_size);
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// allocate state for locals and stack
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mp_code_state_t *code_state = NULL;
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#if MICROPY_ENABLE_PYSTACK
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code_state = mp_pystack_alloc(sizeof(mp_code_state_t) + state_size);
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#else
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if (state_size > VM_MAX_STATE_ON_STACK) {
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code_state = m_new_obj_var_maybe(mp_code_state_t, byte, state_size);
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#if MICROPY_DEBUG_VM_STACK_OVERFLOW
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if (code_state != NULL) {
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memset(code_state->state, 0, state_size);
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}
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#endif
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}
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if (code_state == NULL) {
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code_state = alloca(sizeof(mp_code_state_t) + state_size);
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#if MICROPY_DEBUG_VM_STACK_OVERFLOW
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memset(code_state->state, 0, state_size);
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#endif
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state_size = 0; // indicate that we allocated using alloca
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}
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#endif
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INIT_CODESTATE(code_state, self, n_args, n_kw, args);
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// execute the byte code with the correct globals context
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mp_globals_set(self->globals);
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mp_vm_return_kind_t vm_return_kind = mp_execute_bytecode(code_state, MP_OBJ_NULL);
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mp_globals_set(code_state->old_globals);
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#if MICROPY_DEBUG_VM_STACK_OVERFLOW
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if (vm_return_kind == MP_VM_RETURN_NORMAL) {
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if (code_state->sp < code_state->state) {
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mp_printf(MICROPY_DEBUG_PRINTER, "VM stack underflow: " INT_FMT "\n", code_state->sp - code_state->state);
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assert(0);
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}
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}
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const byte *bytecode_ptr = mp_decode_uint_skip(mp_decode_uint_skip(self->bytecode));
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size_t n_pos_args = bytecode_ptr[1];
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size_t n_kwonly_args = bytecode_ptr[2];
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// We can't check the case when an exception is returned in state[0]
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// and there are no arguments, because in this case our detection slot may have
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// been overwritten by the returned exception (which is allowed).
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if (!(vm_return_kind == MP_VM_RETURN_EXCEPTION && n_pos_args + n_kwonly_args == 0)) {
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// Just check to see that we have at least 1 null object left in the state.
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bool overflow = true;
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for (size_t i = 0; i < n_state - n_pos_args - n_kwonly_args; ++i) {
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if (code_state->state[i] == MP_OBJ_NULL) {
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overflow = false;
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break;
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}
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}
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if (overflow) {
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mp_printf(MICROPY_DEBUG_PRINTER, "VM stack overflow state=%p n_state+1=" UINT_FMT "\n", code_state->state, n_state);
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assert(0);
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}
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}
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#endif
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mp_obj_t result;
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if (vm_return_kind == MP_VM_RETURN_NORMAL) {
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// return value is in *sp
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result = *code_state->sp;
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} else {
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// must be an exception because normal functions can't yield
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assert(vm_return_kind == MP_VM_RETURN_EXCEPTION);
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// returned exception is in state[0]
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result = code_state->state[0];
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}
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#if MICROPY_ENABLE_PYSTACK
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mp_pystack_free(code_state);
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#else
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// free the state if it was allocated on the heap
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if (state_size != 0) {
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m_del_var(mp_code_state_t, byte, state_size, code_state);
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}
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#endif
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if (vm_return_kind == MP_VM_RETURN_NORMAL) {
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return result;
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} else { // MP_VM_RETURN_EXCEPTION
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nlr_raise(result);
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}
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}
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#if MICROPY_PY_FUNCTION_ATTRS
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void mp_obj_fun_bc_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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if (attr == MP_QSTR___name__) {
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dest[0] = MP_OBJ_NEW_QSTR(mp_obj_fun_get_name(self_in));
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}
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}
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#endif
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const mp_obj_type_t mp_type_fun_bc = {
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{ &mp_type_type },
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.name = MP_QSTR_function,
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#if MICROPY_CPYTHON_COMPAT
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.print = fun_bc_print,
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#endif
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.call = fun_bc_call,
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.unary_op = mp_generic_unary_op,
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#if MICROPY_PY_FUNCTION_ATTRS
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.attr = mp_obj_fun_bc_attr,
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#endif
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};
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mp_obj_t mp_obj_new_fun_bc(mp_obj_t def_args_in, mp_obj_t def_kw_args, const byte *code, const mp_uint_t *const_table) {
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size_t n_def_args = 0;
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size_t n_extra_args = 0;
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mp_obj_tuple_t *def_args = MP_OBJ_TO_PTR(def_args_in);
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if (def_args_in != MP_OBJ_NULL) {
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assert(mp_obj_is_type(def_args_in, &mp_type_tuple));
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n_def_args = def_args->len;
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n_extra_args = def_args->len;
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}
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if (def_kw_args != MP_OBJ_NULL) {
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n_extra_args += 1;
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}
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mp_obj_fun_bc_t *o = m_new_obj_var(mp_obj_fun_bc_t, mp_obj_t, n_extra_args);
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o->base.type = &mp_type_fun_bc;
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o->globals = mp_globals_get();
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o->bytecode = code;
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o->const_table = const_table;
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if (def_args != NULL) {
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memcpy(o->extra_args, def_args->items, n_def_args * sizeof(mp_obj_t));
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}
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if (def_kw_args != MP_OBJ_NULL) {
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o->extra_args[n_def_args] = def_kw_args;
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}
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return MP_OBJ_FROM_PTR(o);
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}
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/******************************************************************************/
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/* native functions */
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#if MICROPY_EMIT_NATIVE
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STATIC mp_obj_t fun_native_call(mp_obj_t self_in, size_t n_args, size_t n_kw, const mp_obj_t *args) {
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MP_STACK_CHECK();
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mp_obj_fun_bc_t *self = self_in;
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mp_call_fun_t fun = MICROPY_MAKE_POINTER_CALLABLE((void*)self->bytecode);
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return fun(self_in, n_args, n_kw, args);
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}
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STATIC const mp_obj_type_t mp_type_fun_native = {
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{ &mp_type_type },
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.name = MP_QSTR_function,
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.call = fun_native_call,
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.unary_op = mp_generic_unary_op,
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};
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mp_obj_t mp_obj_new_fun_native(mp_obj_t def_args_in, mp_obj_t def_kw_args, const void *fun_data, const mp_uint_t *const_table) {
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mp_obj_fun_bc_t *o = mp_obj_new_fun_bc(def_args_in, def_kw_args, (const byte*)fun_data, const_table);
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o->base.type = &mp_type_fun_native;
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return o;
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}
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#endif // MICROPY_EMIT_NATIVE
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/******************************************************************************/
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/* inline assembler functions */
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#if MICROPY_EMIT_INLINE_ASM
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typedef struct _mp_obj_fun_asm_t {
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mp_obj_base_t base;
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|
size_t n_args;
|
|
const void *fun_data; // GC must be able to trace this pointer
|
|
mp_uint_t type_sig;
|
|
} mp_obj_fun_asm_t;
|
|
|
|
typedef mp_uint_t (*inline_asm_fun_0_t)(void);
|
|
typedef mp_uint_t (*inline_asm_fun_1_t)(mp_uint_t);
|
|
typedef mp_uint_t (*inline_asm_fun_2_t)(mp_uint_t, mp_uint_t);
|
|
typedef mp_uint_t (*inline_asm_fun_3_t)(mp_uint_t, mp_uint_t, mp_uint_t);
|
|
typedef mp_uint_t (*inline_asm_fun_4_t)(mp_uint_t, mp_uint_t, mp_uint_t, mp_uint_t);
|
|
|
|
// convert a MicroPython object to a sensible value for inline asm
|
|
STATIC mp_uint_t convert_obj_for_inline_asm(mp_obj_t obj) {
|
|
// TODO for byte_array, pass pointer to the array
|
|
if (mp_obj_is_small_int(obj)) {
|
|
return MP_OBJ_SMALL_INT_VALUE(obj);
|
|
} else if (obj == mp_const_none) {
|
|
return 0;
|
|
} else if (obj == mp_const_false) {
|
|
return 0;
|
|
} else if (obj == mp_const_true) {
|
|
return 1;
|
|
} else if (mp_obj_is_type(obj, &mp_type_int)) {
|
|
return mp_obj_int_get_truncated(obj);
|
|
} else if (mp_obj_is_str(obj)) {
|
|
// pointer to the string (it's probably constant though!)
|
|
size_t l;
|
|
return (mp_uint_t)mp_obj_str_get_data(obj, &l);
|
|
} else {
|
|
mp_obj_type_t *type = mp_obj_get_type(obj);
|
|
if (0) {
|
|
#if MICROPY_PY_BUILTINS_FLOAT
|
|
} else if (type == &mp_type_float) {
|
|
// convert float to int (could also pass in float registers)
|
|
return (mp_int_t)mp_obj_float_get(obj);
|
|
#endif
|
|
} else if (type == &mp_type_tuple || type == &mp_type_list) {
|
|
// pointer to start of tuple (could pass length, but then could use len(x) for that)
|
|
size_t len;
|
|
mp_obj_t *items;
|
|
mp_obj_get_array(obj, &len, &items);
|
|
return (mp_uint_t)items;
|
|
} else {
|
|
mp_buffer_info_t bufinfo;
|
|
if (mp_get_buffer(obj, &bufinfo, MP_BUFFER_WRITE)) {
|
|
// supports the buffer protocol, return a pointer to the data
|
|
return (mp_uint_t)bufinfo.buf;
|
|
} else {
|
|
// just pass along a pointer to the object
|
|
return (mp_uint_t)obj;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
STATIC mp_obj_t fun_asm_call(mp_obj_t self_in, size_t n_args, size_t n_kw, const mp_obj_t *args) {
|
|
mp_obj_fun_asm_t *self = self_in;
|
|
|
|
mp_arg_check_num(n_args, n_kw, self->n_args, self->n_args, false);
|
|
|
|
const void *fun = MICROPY_MAKE_POINTER_CALLABLE(self->fun_data);
|
|
|
|
mp_uint_t ret;
|
|
if (n_args == 0) {
|
|
ret = ((inline_asm_fun_0_t)fun)();
|
|
} else if (n_args == 1) {
|
|
ret = ((inline_asm_fun_1_t)fun)(convert_obj_for_inline_asm(args[0]));
|
|
} else if (n_args == 2) {
|
|
ret = ((inline_asm_fun_2_t)fun)(convert_obj_for_inline_asm(args[0]), convert_obj_for_inline_asm(args[1]));
|
|
} else if (n_args == 3) {
|
|
ret = ((inline_asm_fun_3_t)fun)(convert_obj_for_inline_asm(args[0]), convert_obj_for_inline_asm(args[1]), convert_obj_for_inline_asm(args[2]));
|
|
} else {
|
|
// compiler allows at most 4 arguments
|
|
assert(n_args == 4);
|
|
ret = ((inline_asm_fun_4_t)fun)(
|
|
convert_obj_for_inline_asm(args[0]),
|
|
convert_obj_for_inline_asm(args[1]),
|
|
convert_obj_for_inline_asm(args[2]),
|
|
convert_obj_for_inline_asm(args[3])
|
|
);
|
|
}
|
|
|
|
return mp_convert_native_to_obj(ret, self->type_sig);
|
|
}
|
|
|
|
STATIC const mp_obj_type_t mp_type_fun_asm = {
|
|
{ &mp_type_type },
|
|
.name = MP_QSTR_function,
|
|
.call = fun_asm_call,
|
|
.unary_op = mp_generic_unary_op,
|
|
};
|
|
|
|
mp_obj_t mp_obj_new_fun_asm(size_t n_args, const void *fun_data, mp_uint_t type_sig) {
|
|
mp_obj_fun_asm_t *o = m_new_obj(mp_obj_fun_asm_t);
|
|
o->base.type = &mp_type_fun_asm;
|
|
o->n_args = n_args;
|
|
o->fun_data = fun_data;
|
|
o->type_sig = type_sig;
|
|
return o;
|
|
}
|
|
|
|
#endif // MICROPY_EMIT_INLINE_ASM
|
|
|