123 lines
4.8 KiB
C
123 lines
4.8 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013, 2014 Damien P. George
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*
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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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#ifndef MICROPY_INCLUDED_PY_BC_H
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#define MICROPY_INCLUDED_PY_BC_H
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#include "py/runtime.h"
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#include "py/obj.h"
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#include "py/objfun.h"
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// bytecode layout:
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//
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// n_state : var uint
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// n_exc_stack : var uint
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// scope_flags : byte
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// n_pos_args : byte number of arguments this function takes
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// n_kwonly_args : byte number of keyword-only arguments this function takes
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// n_def_pos_args : byte number of default positional arguments
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//
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// code_info_size : var uint | code_info_size counts bytes in this chunk
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// simple_name : var qstr |
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// source_file : var qstr |
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// <line number info> |
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// <word alignment padding> | only needed if bytecode contains pointers
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//
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// local_num0 : byte |
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// ... : byte |
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// local_numN : byte | N = num_cells
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// 255 : byte | end of list sentinel
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// <bytecode> |
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//
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//
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// constant table layout:
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//
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// argname0 : obj (qstr)
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// ... : obj (qstr)
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// argnameN : obj (qstr) N = num_pos_args + num_kwonly_args
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// const0 : obj
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// constN : obj
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// Exception stack entry
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typedef struct _mp_exc_stack_t {
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const byte *handler;
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// bit 0 is saved currently_in_except_block value
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// bit 1 is whether the opcode was SETUP_WITH or SETUP_FINALLY
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mp_obj_t *val_sp;
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// Saved exception, valid if currently_in_except_block bit is 1
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mp_obj_base_t *prev_exc;
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} mp_exc_stack_t;
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typedef struct _mp_code_state_t {
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// The fun_bc entry points to the underlying function object that is being executed.
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// It is needed to access the start of bytecode and the const_table.
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// It is also needed to prevent the GC from reclaiming the bytecode during execution,
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// because the ip pointer below will always point to the interior of the bytecode.
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mp_obj_fun_bc_t *fun_bc;
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const byte *ip;
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mp_obj_t *sp;
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// bit 0 is saved currently_in_except_block value
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mp_exc_stack_t *exc_sp;
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mp_obj_dict_t *old_globals;
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#if MICROPY_STACKLESS
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struct _mp_code_state_t *prev;
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#endif
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// Variable-length
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mp_obj_t state[0];
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// Variable-length, never accessed by name, only as (void*)(state + n_state)
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//mp_exc_stack_t exc_state[0];
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} mp_code_state_t;
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mp_uint_t mp_decode_uint(const byte **ptr);
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mp_uint_t mp_decode_uint_value(const byte *ptr);
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const byte *mp_decode_uint_skip(const byte *ptr);
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mp_vm_return_kind_t mp_execute_bytecode(mp_code_state_t *code_state, volatile mp_obj_t inject_exc);
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mp_code_state_t *mp_obj_fun_bc_prepare_codestate(mp_obj_t func, size_t n_args, size_t n_kw, const mp_obj_t *args);
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void mp_setup_code_state(mp_code_state_t *code_state, size_t n_args, size_t n_kw, const mp_obj_t *args);
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void mp_bytecode_print(const void *descr, const byte *code, mp_uint_t len, const mp_uint_t *const_table);
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void mp_bytecode_print2(const byte *code, size_t len, const mp_uint_t *const_table);
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const byte *mp_bytecode_print_str(const byte *ip);
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#define mp_bytecode_print_inst(code, const_table) mp_bytecode_print2(code, 1, const_table)
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// Helper macros to access pointer with least significant bits holding flags
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#define MP_TAGPTR_PTR(x) ((void*)((uintptr_t)(x) & ~((uintptr_t)3)))
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#define MP_TAGPTR_TAG0(x) ((uintptr_t)(x) & 1)
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#define MP_TAGPTR_TAG1(x) ((uintptr_t)(x) & 2)
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#define MP_TAGPTR_MAKE(ptr, tag) ((void*)((uintptr_t)(ptr) | (tag)))
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#if MICROPY_PERSISTENT_CODE_LOAD || MICROPY_PERSISTENT_CODE_SAVE
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#define MP_OPCODE_BYTE (0)
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#define MP_OPCODE_QSTR (1)
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#define MP_OPCODE_VAR_UINT (2)
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#define MP_OPCODE_OFFSET (3)
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uint mp_opcode_format(const byte *ip, size_t *opcode_size);
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#endif
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#endif // MICROPY_INCLUDED_PY_BC_H
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