282 lines
13 KiB
C
282 lines
13 KiB
C
/*
|
|
* This file is part of the MicroPython project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* SPDX-FileCopyrightText: Copyright (c) 2013, 2014 Damien P. George
|
|
* SPDX-FileCopyrightText: Copyright (c) 2014 Paul Sokolovsky
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
#ifndef MICROPY_INCLUDED_PY_BC_H
|
|
#define MICROPY_INCLUDED_PY_BC_H
|
|
|
|
#include "py/runtime.h"
|
|
#include "py/objfun.h"
|
|
|
|
// bytecode layout:
|
|
//
|
|
// func signature : var uint
|
|
// contains six values interleaved bit-wise as: xSSSSEAA [xFSSKAED repeated]
|
|
// x = extension another byte follows
|
|
// S = n_state - 1 number of entries in Python value stack
|
|
// E = n_exc_stack number of entries in exception stack
|
|
// F = scope_flags four bits of flags, MP_SCOPE_FLAG_xxx
|
|
// A = n_pos_args number of arguments this function takes
|
|
// K = n_kwonly_args number of keyword-only arguments this function takes
|
|
// D = n_def_pos_args number of default positional arguments
|
|
//
|
|
// prelude size : var uint
|
|
// contains two values interleaved bit-wise as: xIIIIIIC repeated
|
|
// x = extension another byte follows
|
|
// I = n_info number of bytes in source info section
|
|
// C = n_cells number of bytes/cells in closure section
|
|
//
|
|
// source info section:
|
|
// simple_name : var qstr
|
|
// source_file : var qstr
|
|
// <line number info>
|
|
//
|
|
// closure section:
|
|
// local_num0 : byte
|
|
// ... : byte
|
|
// local_numN : byte N = n_cells-1
|
|
//
|
|
// <word alignment padding> only needed if bytecode contains pointers
|
|
//
|
|
// <bytecode>
|
|
//
|
|
//
|
|
// constant table layout:
|
|
//
|
|
// argname0 : obj (qstr)
|
|
// ... : obj (qstr)
|
|
// argnameN : obj (qstr) N = num_pos_args + num_kwonly_args
|
|
// const0 : obj
|
|
// constN : obj
|
|
|
|
#define MP_BC_PRELUDE_SIG_ENCODE(S, E, scope, out_byte, out_env) \
|
|
do { \
|
|
/*// Get values to store in prelude */ \
|
|
size_t F = scope->scope_flags & MP_SCOPE_FLAG_ALL_SIG; \
|
|
size_t A = scope->num_pos_args; \
|
|
size_t K = scope->num_kwonly_args; \
|
|
size_t D = scope->num_def_pos_args; \
|
|
\
|
|
/* Adjust S to shrink range, to compress better */ \
|
|
S -= 1; \
|
|
\
|
|
/* Encode prelude */ \
|
|
/* xSSSSEAA */ \
|
|
uint8_t z = (S & 0xf) << 3 | (E & 1) << 2 | (A & 3); \
|
|
S >>= 4; \
|
|
E >>= 1; \
|
|
A >>= 2; \
|
|
while (S | E | F | A | K | D) { \
|
|
out_byte(out_env, 0x80 | z); \
|
|
/* xFSSKAED */ \
|
|
z = (F & 1) << 6 | (S & 3) << 4 | (K & 1) << 3 \
|
|
| (A & 1) << 2 | (E & 1) << 1 | (D & 1); \
|
|
S >>= 2; \
|
|
E >>= 1; \
|
|
F >>= 1; \
|
|
A >>= 1; \
|
|
K >>= 1; \
|
|
D >>= 1; \
|
|
} \
|
|
out_byte(out_env, z); \
|
|
} while (0)
|
|
|
|
#define MP_BC_PRELUDE_SIG_DECODE_INTO(ip, S, E, F, A, K, D) \
|
|
do { \
|
|
uint8_t z = *(ip)++; \
|
|
/* xSSSSEAA */ \
|
|
S = (z >> 3) & 0xf; \
|
|
E = (z >> 2) & 0x1; \
|
|
F = 0; \
|
|
A = z & 0x3; \
|
|
K = 0; \
|
|
D = 0; \
|
|
for (unsigned n = 0; z & 0x80; ++n) { \
|
|
z = *(ip)++; \
|
|
/* xFSSKAED */ \
|
|
S |= (z & 0x30) << (2 * n); \
|
|
E |= (z & 0x02) << n; \
|
|
F |= ((z & 0x40) >> 6) << n; \
|
|
A |= (z & 0x4) << n; \
|
|
K |= ((z & 0x08) >> 3) << n; \
|
|
D |= (z & 0x1) << n; \
|
|
} \
|
|
S += 1; \
|
|
(void)E; \
|
|
(void)F; \
|
|
(void)A; \
|
|
(void)K; \
|
|
(void)D; \
|
|
} while (0)
|
|
|
|
#define MP_BC_PRELUDE_SIG_DECODE(ip) \
|
|
size_t n_state, n_exc_stack, scope_flags, n_pos_args, n_kwonly_args, n_def_pos_args; \
|
|
MP_BC_PRELUDE_SIG_DECODE_INTO(ip, n_state, n_exc_stack, scope_flags, n_pos_args, n_kwonly_args, n_def_pos_args); \
|
|
(void)n_state; (void)n_exc_stack; (void)scope_flags; \
|
|
(void)n_pos_args; (void)n_kwonly_args; (void)n_def_pos_args
|
|
|
|
#define MP_BC_PRELUDE_SIZE_ENCODE(I, C, out_byte, out_env) \
|
|
do { \
|
|
/* Encode bit-wise as: xIIIIIIC */ \
|
|
uint8_t z = 0; \
|
|
do { \
|
|
z = (I & 0x3f) << 1 | (C & 1); \
|
|
C >>= 1; \
|
|
I >>= 6; \
|
|
if (C | I) { \
|
|
z |= 0x80; \
|
|
} \
|
|
out_byte(out_env, z); \
|
|
} while (C | I); \
|
|
} while (0)
|
|
|
|
#define MP_BC_PRELUDE_SIZE_DECODE_INTO(ip, I, C) \
|
|
do { \
|
|
uint8_t z; \
|
|
C = 0; \
|
|
I = 0; \
|
|
for (unsigned n = 0;; ++n) { \
|
|
z = *(ip)++; \
|
|
/* xIIIIIIC */ \
|
|
C |= (z & 1) << n; \
|
|
I |= ((z & 0x7e) >> 1) << (6 * n); \
|
|
if (!(z & 0x80)) { \
|
|
break; \
|
|
} \
|
|
} \
|
|
} while (0)
|
|
|
|
#define MP_BC_PRELUDE_SIZE_DECODE(ip) \
|
|
size_t n_info, n_cell; \
|
|
MP_BC_PRELUDE_SIZE_DECODE_INTO(ip, n_info, n_cell); \
|
|
(void)n_info; (void)n_cell
|
|
|
|
// Sentinel value for mp_code_state_t.exc_sp_idx
|
|
#define MP_CODE_STATE_EXC_SP_IDX_SENTINEL ((uint16_t)-1)
|
|
|
|
// To convert mp_code_state_t.exc_sp_idx to/from a pointer to mp_exc_stack_t
|
|
#define MP_CODE_STATE_EXC_SP_IDX_FROM_PTR(exc_stack, exc_sp) ((exc_sp) + 1 - (exc_stack))
|
|
#define MP_CODE_STATE_EXC_SP_IDX_TO_PTR(exc_stack, exc_sp_idx) ((exc_stack) + (exc_sp_idx) - 1)
|
|
|
|
typedef struct _mp_bytecode_prelude_t {
|
|
uint n_state;
|
|
uint n_exc_stack;
|
|
uint scope_flags;
|
|
uint n_pos_args;
|
|
uint n_kwonly_args;
|
|
uint n_def_pos_args;
|
|
qstr qstr_block_name;
|
|
qstr qstr_source_file;
|
|
const byte *line_info;
|
|
const byte *opcodes;
|
|
} mp_bytecode_prelude_t;
|
|
|
|
// Exception stack entry
|
|
typedef struct _mp_exc_stack_t {
|
|
const byte *handler;
|
|
// bit 0 is currently unused
|
|
// bit 1 is whether the opcode was SETUP_WITH or SETUP_FINALLY
|
|
mp_obj_t *val_sp;
|
|
// Saved exception
|
|
mp_obj_base_t *prev_exc;
|
|
} mp_exc_stack_t;
|
|
|
|
typedef struct _mp_code_state_t {
|
|
// The fun_bc entry points to the underlying function object that is being executed.
|
|
// It is needed to access the start of bytecode and the const_table.
|
|
// It is also needed to prevent the GC from reclaiming the bytecode during execution,
|
|
// because the ip pointer below will always point to the interior of the bytecode.
|
|
mp_obj_fun_bc_t *fun_bc;
|
|
const byte *ip;
|
|
mp_obj_t *sp;
|
|
uint16_t n_state;
|
|
uint16_t exc_sp_idx;
|
|
mp_obj_dict_t *old_globals;
|
|
#if MICROPY_STACKLESS
|
|
struct _mp_code_state_t *prev;
|
|
#endif
|
|
#if MICROPY_PY_SYS_SETTRACE
|
|
struct _mp_code_state_t *prev_state;
|
|
struct _mp_obj_frame_t *frame;
|
|
#endif
|
|
// Variable-length
|
|
mp_obj_t state[0];
|
|
// Variable-length, never accessed by name, only as (void*)(state + n_state)
|
|
// mp_exc_stack_t exc_state[0];
|
|
} mp_code_state_t;
|
|
|
|
mp_uint_t mp_decode_uint(const byte **ptr);
|
|
mp_uint_t mp_decode_uint_value(const byte *ptr);
|
|
const byte *mp_decode_uint_skip(const byte *ptr);
|
|
|
|
mp_vm_return_kind_t mp_execute_bytecode(mp_code_state_t *code_state, volatile mp_obj_t inject_exc);
|
|
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);
|
|
void mp_setup_code_state(mp_code_state_t *code_state, size_t n_args, size_t n_kw, const mp_obj_t *args);
|
|
void mp_bytecode_print(const mp_print_t *print, const void *descr, const byte *code, mp_uint_t len, const mp_uint_t *const_table);
|
|
void mp_bytecode_print2(const mp_print_t *print, const byte *code, size_t len, const mp_uint_t *const_table);
|
|
const byte *mp_bytecode_print_str(const mp_print_t *print, const byte *ip);
|
|
#define mp_bytecode_print_inst(print, code, const_table) mp_bytecode_print2(print, code, 1, const_table)
|
|
|
|
// Helper macros to access pointer with least significant bits holding flags
|
|
#define MP_TAGPTR_PTR(x) ((void *)((uintptr_t)(x) & ~((uintptr_t)3)))
|
|
#define MP_TAGPTR_TAG0(x) ((uintptr_t)(x) & 1)
|
|
#define MP_TAGPTR_TAG1(x) ((uintptr_t)(x) & 2)
|
|
#define MP_TAGPTR_MAKE(ptr, tag) ((void *)((uintptr_t)(ptr) | (tag)))
|
|
|
|
#if MICROPY_PERSISTENT_CODE_LOAD || MICROPY_PERSISTENT_CODE_SAVE
|
|
|
|
uint mp_opcode_format(const byte *ip, size_t *opcode_size, bool count_var_uint);
|
|
|
|
#endif
|
|
|
|
static inline size_t mp_bytecode_get_source_line(const byte *line_info, size_t bc_offset) {
|
|
size_t source_line = 1;
|
|
size_t c;
|
|
while ((c = *line_info)) {
|
|
size_t b, l;
|
|
if ((c & 0x80) == 0) {
|
|
// 0b0LLBBBBB encoding
|
|
b = c & 0x1f;
|
|
l = c >> 5;
|
|
line_info += 1;
|
|
} else {
|
|
// 0b1LLLBBBB 0bLLLLLLLL encoding (l's LSB in second byte)
|
|
b = c & 0xf;
|
|
l = ((c << 4) & 0x700) | line_info[1];
|
|
line_info += 2;
|
|
}
|
|
if (bc_offset >= b) {
|
|
bc_offset -= b;
|
|
source_line += l;
|
|
} else {
|
|
// found source line corresponding to bytecode offset
|
|
break;
|
|
}
|
|
}
|
|
return source_line;
|
|
}
|
|
|
|
#endif // MICROPY_INCLUDED_PY_BC_H
|