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407 lines
12 KiB
407 lines
12 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) 2013-2016 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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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include <assert.h>
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#include "py/reader.h"
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#include "py/emitglue.h"
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#include "py/persistentcode.h"
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#include "py/bc.h"
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#if MICROPY_PERSISTENT_CODE_LOAD || MICROPY_PERSISTENT_CODE_SAVE
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#include "py/smallint.h"
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// The current version of .mpy files
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#define MPY_VERSION (3)
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// The feature flags byte encodes the compile-time config options that
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// affect the generate bytecode.
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#define MPY_FEATURE_FLAGS ( \
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((MICROPY_OPT_CACHE_MAP_LOOKUP_IN_BYTECODE) << 0) \
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| ((MICROPY_PY_BUILTINS_STR_UNICODE) << 1) \
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)
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// This is a version of the flags that can be configured at runtime.
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#define MPY_FEATURE_FLAGS_DYNAMIC ( \
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((MICROPY_OPT_CACHE_MAP_LOOKUP_IN_BYTECODE_DYNAMIC) << 0) \
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| ((MICROPY_PY_BUILTINS_STR_UNICODE_DYNAMIC) << 1) \
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)
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#if MICROPY_PERSISTENT_CODE_LOAD || (MICROPY_PERSISTENT_CODE_SAVE && !MICROPY_DYNAMIC_COMPILER)
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// The bytecode will depend on the number of bits in a small-int, and
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// this function computes that (could make it a fixed constant, but it
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// would need to be defined in mpconfigport.h).
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STATIC int mp_small_int_bits(void) {
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mp_int_t i = MP_SMALL_INT_MAX;
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int n = 1;
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while (i != 0) {
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i >>= 1;
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++n;
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}
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return n;
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}
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#endif
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typedef struct _bytecode_prelude_t {
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uint n_state;
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uint n_exc_stack;
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uint scope_flags;
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uint n_pos_args;
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uint n_kwonly_args;
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uint n_def_pos_args;
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uint code_info_size;
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} bytecode_prelude_t;
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// ip will point to start of opcodes
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// ip2 will point to simple_name, source_file qstrs
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STATIC void extract_prelude(const byte **ip, const byte **ip2, bytecode_prelude_t *prelude) {
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prelude->n_state = mp_decode_uint(ip);
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prelude->n_exc_stack = mp_decode_uint(ip);
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prelude->scope_flags = *(*ip)++;
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prelude->n_pos_args = *(*ip)++;
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prelude->n_kwonly_args = *(*ip)++;
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prelude->n_def_pos_args = *(*ip)++;
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*ip2 = *ip;
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prelude->code_info_size = mp_decode_uint(ip2);
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*ip += prelude->code_info_size;
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while (*(*ip)++ != 255) {
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}
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}
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#endif // MICROPY_PERSISTENT_CODE_LOAD || MICROPY_PERSISTENT_CODE_SAVE
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#if MICROPY_PERSISTENT_CODE_LOAD
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#include "py/parsenum.h"
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STATIC int read_byte(mp_reader_t *reader) {
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return reader->readbyte(reader->data);
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}
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STATIC void read_bytes(mp_reader_t *reader, byte *buf, size_t len) {
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while (len-- > 0) {
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*buf++ = reader->readbyte(reader->data);
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}
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}
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STATIC size_t read_uint(mp_reader_t *reader) {
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size_t unum = 0;
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for (;;) {
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byte b = reader->readbyte(reader->data);
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unum = (unum << 7) | (b & 0x7f);
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if ((b & 0x80) == 0) {
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break;
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}
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}
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return unum;
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}
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STATIC qstr load_qstr(mp_reader_t *reader) {
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size_t len = read_uint(reader);
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char *str = m_new(char, len);
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read_bytes(reader, (byte*)str, len);
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qstr qst = qstr_from_strn(str, len);
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m_del(char, str, len);
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return qst;
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}
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STATIC mp_obj_t load_obj(mp_reader_t *reader) {
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byte obj_type = read_byte(reader);
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if (obj_type == 'e') {
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return MP_OBJ_FROM_PTR(&mp_const_ellipsis_obj);
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} else {
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size_t len = read_uint(reader);
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vstr_t vstr;
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vstr_init_len(&vstr, len);
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read_bytes(reader, (byte*)vstr.buf, len);
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if (obj_type == 's' || obj_type == 'b') {
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return mp_obj_new_str_from_vstr(obj_type == 's' ? &mp_type_str : &mp_type_bytes, &vstr);
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} else if (obj_type == 'i') {
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return mp_parse_num_integer(vstr.buf, vstr.len, 10, NULL);
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} else {
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assert(obj_type == 'f' || obj_type == 'c');
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return mp_parse_num_decimal(vstr.buf, vstr.len, obj_type == 'c', false, NULL);
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}
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}
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}
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STATIC void load_bytecode_qstrs(mp_reader_t *reader, byte *ip, byte *ip_top) {
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while (ip < ip_top) {
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size_t sz;
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uint f = mp_opcode_format(ip, &sz);
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if (f == MP_OPCODE_QSTR) {
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qstr qst = load_qstr(reader);
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ip[1] = qst;
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ip[2] = qst >> 8;
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}
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ip += sz;
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}
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}
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STATIC mp_raw_code_t *load_raw_code(mp_reader_t *reader) {
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// load bytecode
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size_t bc_len = read_uint(reader);
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byte *bytecode = m_new(byte, bc_len);
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read_bytes(reader, bytecode, bc_len);
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// extract prelude
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const byte *ip = bytecode;
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const byte *ip2;
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bytecode_prelude_t prelude;
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extract_prelude(&ip, &ip2, &prelude);
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// load qstrs and link global qstr ids into bytecode
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qstr simple_name = load_qstr(reader);
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qstr source_file = load_qstr(reader);
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((byte*)ip2)[0] = simple_name; ((byte*)ip2)[1] = simple_name >> 8;
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((byte*)ip2)[2] = source_file; ((byte*)ip2)[3] = source_file >> 8;
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load_bytecode_qstrs(reader, (byte*)ip, bytecode + bc_len);
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// load constant table
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size_t n_obj = read_uint(reader);
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size_t n_raw_code = read_uint(reader);
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mp_uint_t *const_table = m_new(mp_uint_t, prelude.n_pos_args + prelude.n_kwonly_args + n_obj + n_raw_code);
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mp_uint_t *ct = const_table;
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for (size_t i = 0; i < prelude.n_pos_args + prelude.n_kwonly_args; ++i) {
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*ct++ = (mp_uint_t)MP_OBJ_NEW_QSTR(load_qstr(reader));
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}
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for (size_t i = 0; i < n_obj; ++i) {
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*ct++ = (mp_uint_t)load_obj(reader);
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}
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for (size_t i = 0; i < n_raw_code; ++i) {
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*ct++ = (mp_uint_t)(uintptr_t)load_raw_code(reader);
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}
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// create raw_code and return it
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mp_raw_code_t *rc = mp_emit_glue_new_raw_code();
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mp_emit_glue_assign_bytecode(rc, bytecode,
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#if MICROPY_PERSISTENT_CODE_SAVE || MICROPY_DEBUG_PRINTERS
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bc_len,
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#endif
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const_table,
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#if MICROPY_PERSISTENT_CODE_SAVE
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n_obj, n_raw_code,
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#endif
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prelude.scope_flags);
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return rc;
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}
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mp_raw_code_t *mp_raw_code_load(mp_reader_t *reader) {
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byte header[4];
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read_bytes(reader, header, sizeof(header));
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if (header[0] != 'M'
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|| header[1] != MPY_VERSION
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|| header[2] != MPY_FEATURE_FLAGS
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|| header[3] > mp_small_int_bits()) {
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mp_raise_ValueError("incompatible .mpy file");
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}
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mp_raw_code_t *rc = load_raw_code(reader);
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reader->close(reader->data);
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return rc;
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}
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mp_raw_code_t *mp_raw_code_load_mem(const byte *buf, size_t len) {
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mp_reader_t reader;
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mp_reader_new_mem(&reader, buf, len, 0);
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return mp_raw_code_load(&reader);
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}
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#if MICROPY_HAS_FILE_READER
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mp_raw_code_t *mp_raw_code_load_file(const char *filename) {
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mp_reader_t reader;
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mp_reader_new_file(&reader, filename);
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return mp_raw_code_load(&reader);
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}
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#endif // MICROPY_HAS_FILE_READER
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#endif // MICROPY_PERSISTENT_CODE_LOAD
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#if MICROPY_PERSISTENT_CODE_SAVE
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#include "py/objstr.h"
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STATIC void mp_print_bytes(mp_print_t *print, const byte *data, size_t len) {
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print->print_strn(print->data, (const char*)data, len);
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}
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#define BYTES_FOR_INT ((BYTES_PER_WORD * 8 + 6) / 7)
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STATIC void mp_print_uint(mp_print_t *print, size_t n) {
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byte buf[BYTES_FOR_INT];
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byte *p = buf + sizeof(buf);
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*--p = n & 0x7f;
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n >>= 7;
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for (; n != 0; n >>= 7) {
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*--p = 0x80 | (n & 0x7f);
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}
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print->print_strn(print->data, (char*)p, buf + sizeof(buf) - p);
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}
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STATIC void save_qstr(mp_print_t *print, qstr qst) {
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size_t len;
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const byte *str = qstr_data(qst, &len);
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mp_print_uint(print, len);
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mp_print_bytes(print, str, len);
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}
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STATIC void save_obj(mp_print_t *print, mp_obj_t o) {
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if (MP_OBJ_IS_STR_OR_BYTES(o)) {
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byte obj_type;
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if (MP_OBJ_IS_STR(o)) {
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obj_type = 's';
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} else {
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obj_type = 'b';
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}
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mp_uint_t len;
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const char *str = mp_obj_str_get_data(o, &len);
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mp_print_bytes(print, &obj_type, 1);
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mp_print_uint(print, len);
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mp_print_bytes(print, (const byte*)str, len);
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} else if (MP_OBJ_TO_PTR(o) == &mp_const_ellipsis_obj) {
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byte obj_type = 'e';
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mp_print_bytes(print, &obj_type, 1);
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} else {
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// we save numbers using a simplistic text representation
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// TODO could be improved
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byte obj_type;
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if (MP_OBJ_IS_TYPE(o, &mp_type_int)) {
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obj_type = 'i';
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#if MICROPY_PY_BUILTINS_COMPLEX
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} else if (MP_OBJ_IS_TYPE(o, &mp_type_complex)) {
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obj_type = 'c';
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#endif
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} else {
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assert(mp_obj_is_float(o));
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obj_type = 'f';
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}
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vstr_t vstr;
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mp_print_t pr;
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vstr_init_print(&vstr, 10, &pr);
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mp_obj_print_helper(&pr, o, PRINT_REPR);
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mp_print_bytes(print, &obj_type, 1);
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mp_print_uint(print, vstr.len);
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mp_print_bytes(print, (const byte*)vstr.buf, vstr.len);
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vstr_clear(&vstr);
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}
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}
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STATIC void save_bytecode_qstrs(mp_print_t *print, const byte *ip, const byte *ip_top) {
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while (ip < ip_top) {
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size_t sz;
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uint f = mp_opcode_format(ip, &sz);
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if (f == MP_OPCODE_QSTR) {
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qstr qst = ip[1] | (ip[2] << 8);
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save_qstr(print, qst);
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}
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ip += sz;
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}
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}
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STATIC void save_raw_code(mp_print_t *print, mp_raw_code_t *rc) {
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if (rc->kind != MP_CODE_BYTECODE) {
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mp_raise_ValueError("can only save bytecode");
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}
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// save bytecode
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mp_print_uint(print, rc->data.u_byte.bc_len);
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mp_print_bytes(print, rc->data.u_byte.bytecode, rc->data.u_byte.bc_len);
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// extract prelude
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const byte *ip = rc->data.u_byte.bytecode;
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const byte *ip2;
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bytecode_prelude_t prelude;
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extract_prelude(&ip, &ip2, &prelude);
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// save qstrs
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save_qstr(print, ip2[0] | (ip2[1] << 8)); // simple_name
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save_qstr(print, ip2[2] | (ip2[3] << 8)); // source_file
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save_bytecode_qstrs(print, ip, rc->data.u_byte.bytecode + rc->data.u_byte.bc_len);
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// save constant table
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mp_print_uint(print, rc->data.u_byte.n_obj);
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mp_print_uint(print, rc->data.u_byte.n_raw_code);
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const mp_uint_t *const_table = rc->data.u_byte.const_table;
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for (uint i = 0; i < prelude.n_pos_args + prelude.n_kwonly_args; ++i) {
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mp_obj_t o = (mp_obj_t)*const_table++;
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save_qstr(print, MP_OBJ_QSTR_VALUE(o));
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}
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for (uint i = 0; i < rc->data.u_byte.n_obj; ++i) {
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save_obj(print, (mp_obj_t)*const_table++);
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}
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for (uint i = 0; i < rc->data.u_byte.n_raw_code; ++i) {
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save_raw_code(print, (mp_raw_code_t*)(uintptr_t)*const_table++);
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}
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}
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void mp_raw_code_save(mp_raw_code_t *rc, mp_print_t *print) {
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// header contains:
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// byte 'M'
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// byte version
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// byte feature flags
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// byte number of bits in a small int
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byte header[4] = {'M', MPY_VERSION, MPY_FEATURE_FLAGS_DYNAMIC,
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#if MICROPY_DYNAMIC_COMPILER
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mp_dynamic_compiler.small_int_bits,
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#else
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mp_small_int_bits(),
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#endif
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};
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mp_print_bytes(print, header, sizeof(header));
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save_raw_code(print, rc);
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}
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// here we define mp_raw_code_save_file depending on the port
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// TODO abstract this away properly
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#if defined(__i386__) || defined(__x86_64__) || defined(__unix__)
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#include <unistd.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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STATIC void fd_print_strn(void *env, const char *str, size_t len) {
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int fd = (intptr_t)env;
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ssize_t ret = write(fd, str, len);
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(void)ret;
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}
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void mp_raw_code_save_file(mp_raw_code_t *rc, const char *filename) {
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int fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0644);
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mp_print_t fd_print = {(void*)(intptr_t)fd, fd_print_strn};
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mp_raw_code_save(rc, &fd_print);
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close(fd);
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}
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#else
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#error mp_raw_code_save_file not implemented for this platform
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#endif
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#endif // MICROPY_PERSISTENT_CODE_SAVE
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