561 lines
19 KiB
C
561 lines
19 KiB
C
/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013, 2014 Damien P. George
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* 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/nlr.h"
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#include "py/objtuple.h"
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#include "py/objfun.h"
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#include "py/runtime0.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 0 // 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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// mp_obj_fun_builtin_t defined in obj.h
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STATIC mp_obj_t fun_builtin_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));
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mp_obj_fun_builtin_t *self = MP_OBJ_TO_PTR(self_in);
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// check number of arguments
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mp_arg_check_num(n_args, n_kw, self->n_args_min, self->n_args_max, self->is_kw);
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if (self->is_kw) {
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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 if (self->n_args_min <= 3 && self->n_args_min == self->n_args_max) {
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// function requires a fixed number of arguments
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// dispatch function call
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switch (self->n_args_min) {
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case 0:
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return self->fun._0();
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case 1:
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return self->fun._1(args[0]);
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case 2:
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return self->fun._2(args[0], args[1]);
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case 3:
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default:
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return self->fun._3(args[0], args[1], args[2]);
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}
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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 = {
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{ &mp_type_type },
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.name = MP_QSTR_function,
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.call = fun_builtin_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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mp_decode_uint(&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(&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) {
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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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mp_decode_uint(&bc); // skip n_state
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mp_decode_uint(&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, mp_uint_t sz) {
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DEBUG_printf("%p: ", a);
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for (mp_uint_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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// Set this to enable a simple stack overflow check.
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#define VM_DETECT_STACK_OVERFLOW (0)
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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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// get start of bytecode
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const byte *ip = self->bytecode;
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// bytecode prelude: state size and exception stack size
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size_t n_state = mp_decode_uint(&ip);
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size_t n_exc_stack = mp_decode_uint(&ip);
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// allocate state for locals and stack
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size_t state_size = n_state * sizeof(mp_obj_t) + n_exc_stack * sizeof(mp_exc_stack_t);
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mp_code_state_t *code_state;
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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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code_state->ip = (byte*)(ip - self->bytecode); // offset to after n_state/n_exc_stack
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code_state->n_state = n_state;
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mp_setup_code_state(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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code_state->old_globals = mp_globals_get();
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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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DEBUG_printf("Func n_def_args: %d\n", self->n_def_args);
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// get start of bytecode
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const byte *ip = self->bytecode;
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// bytecode prelude: state size and exception stack size
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mp_uint_t n_state = mp_decode_uint(&ip);
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mp_uint_t n_exc_stack = mp_decode_uint(&ip);
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#if VM_DETECT_STACK_OVERFLOW
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n_state += 1;
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#endif
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// allocate state for locals and stack
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mp_uint_t state_size = n_state * sizeof(mp_obj_t) + n_exc_stack * sizeof(mp_exc_stack_t);
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mp_code_state_t *code_state = NULL;
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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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}
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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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state_size = 0; // indicate that we allocated using alloca
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}
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code_state->ip = (byte*)(ip - self->bytecode); // offset to after n_state/n_exc_stack
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code_state->n_state = n_state;
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mp_setup_code_state(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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code_state->old_globals = mp_globals_get();
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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 VM_DETECT_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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printf("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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// We can't check the case when an exception is returned in state[n_state - 1]
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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 && self->n_pos_args + self->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 (mp_uint_t i = 0; i < n_state - self->n_pos_args - self->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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printf("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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switch (vm_return_kind) {
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case 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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break;
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case MP_VM_RETURN_EXCEPTION:
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// return value is in state[n_state - 1]
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result = code_state->state[n_state - 1];
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break;
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case MP_VM_RETURN_YIELD: // byte-code shouldn't yield
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default:
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assert(0);
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result = mp_const_none;
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vm_return_kind = MP_VM_RETURN_NORMAL;
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break;
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}
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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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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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STATIC void 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 = 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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mp_uint_t n_def_args = 0;
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mp_uint_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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/* viper functions */
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#if MICROPY_EMIT_NATIVE
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typedef struct _mp_obj_fun_viper_t {
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mp_obj_base_t base;
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mp_uint_t n_args;
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void *fun_data; // GC must be able to trace this pointer
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mp_uint_t type_sig;
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} mp_obj_fun_viper_t;
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typedef mp_uint_t (*viper_fun_0_t)(void);
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typedef mp_uint_t (*viper_fun_1_t)(mp_uint_t);
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typedef mp_uint_t (*viper_fun_2_t)(mp_uint_t, mp_uint_t);
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typedef mp_uint_t (*viper_fun_3_t)(mp_uint_t, mp_uint_t, mp_uint_t);
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typedef mp_uint_t (*viper_fun_4_t)(mp_uint_t, mp_uint_t, mp_uint_t, mp_uint_t);
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STATIC mp_obj_t fun_viper_call(mp_obj_t self_in, size_t n_args, size_t n_kw, const mp_obj_t *args) {
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mp_obj_fun_viper_t *self = self_in;
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mp_arg_check_num(n_args, n_kw, self->n_args, self->n_args, false);
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void *fun = MICROPY_MAKE_POINTER_CALLABLE(self->fun_data);
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mp_uint_t ret;
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if (n_args == 0) {
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ret = ((viper_fun_0_t)fun)();
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} else if (n_args == 1) {
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ret = ((viper_fun_1_t)fun)(mp_convert_obj_to_native(args[0], self->type_sig >> 4));
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} else if (n_args == 2) {
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ret = ((viper_fun_2_t)fun)(mp_convert_obj_to_native(args[0], self->type_sig >> 4), mp_convert_obj_to_native(args[1], self->type_sig >> 8));
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} else if (n_args == 3) {
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ret = ((viper_fun_3_t)fun)(mp_convert_obj_to_native(args[0], self->type_sig >> 4), mp_convert_obj_to_native(args[1], self->type_sig >> 8), mp_convert_obj_to_native(args[2], self->type_sig >> 12));
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} else if (n_args == 4) {
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ret = ((viper_fun_4_t)fun)(
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mp_convert_obj_to_native(args[0], self->type_sig >> 4),
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mp_convert_obj_to_native(args[1], self->type_sig >> 8),
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mp_convert_obj_to_native(args[2], self->type_sig >> 12),
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mp_convert_obj_to_native(args[3], self->type_sig >> 16)
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);
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} else {
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// TODO 5 or more arguments not supported for viper call
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assert(0);
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ret = 0;
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}
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return mp_convert_native_to_obj(ret, self->type_sig);
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}
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STATIC const mp_obj_type_t mp_type_fun_viper = {
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{ &mp_type_type },
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.name = MP_QSTR_function,
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.call = fun_viper_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_viper(mp_uint_t n_args, void *fun_data, mp_uint_t type_sig) {
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mp_obj_fun_viper_t *o = m_new_obj(mp_obj_fun_viper_t);
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o->base.type = &mp_type_fun_viper;
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o->n_args = n_args;
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o->fun_data = fun_data;
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o->type_sig = type_sig;
|
|
return o;
|
|
}
|
|
|
|
#endif // MICROPY_EMIT_NATIVE
|
|
|
|
/******************************************************************************/
|
|
/* inline assembler functions */
|
|
|
|
#if MICROPY_EMIT_INLINE_THUMB
|
|
|
|
typedef struct _mp_obj_fun_asm_t {
|
|
mp_obj_base_t base;
|
|
mp_uint_t n_args;
|
|
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 Micro Python 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!)
|
|
mp_uint_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) {
|
|
// pointer to start of tuple (could pass length, but then could use len(x) for that)
|
|
mp_uint_t len;
|
|
mp_obj_t *items;
|
|
mp_obj_tuple_get(obj, &len, &items);
|
|
return (mp_uint_t)items;
|
|
} else if (type == &mp_type_list) {
|
|
// pointer to start of list (could pass length, but then could use len(x) for that)
|
|
mp_uint_t len;
|
|
mp_obj_t *items;
|
|
mp_obj_list_get(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);
|
|
|
|
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(mp_uint_t n_args, 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_THUMB
|