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circuitpython/py/persistentcode.c
Damien George c8c0fd4ca3 py: Rework and compress second part of bytecode prelude. 
This patch compresses the second part of the bytecode prelude which
contains the source file name, function name, source-line-number mapping
and cell closure information.  This part of the prelude now begins with a
single varible length unsigned integer which encodes 2 numbers, being the
byte-size of the following 2 sections in the header: the "source info
section" and the "closure section".  After decoding this variable unsigned
integer it's possible to skip over one or both of these sections very
easily.

This scheme saves about 2 bytes for most functions compared to the original
format: one in the case that there are no closure cells, and one because
padding was eliminated.
2019-10-01 12:26:22 +10:00

773 lines
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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013-2016 Damien P. George
*
* 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.
*/
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include "py/reader.h"
#include "py/emitglue.h"
#include "py/persistentcode.h"
#include "py/bc0.h"
#if MICROPY_PERSISTENT_CODE_LOAD || MICROPY_PERSISTENT_CODE_SAVE
#include "py/smallint.h"
#define QSTR_LAST_STATIC MP_QSTR_zip
// Macros to encode/decode flags to/from the feature byte
#define MPY_FEATURE_ENCODE_FLAGS(flags) (flags)
#define MPY_FEATURE_DECODE_FLAGS(feat) ((feat) & 3)
// Macros to encode/decode native architecture to/from the feature byte
#define MPY_FEATURE_ENCODE_ARCH(arch) ((arch) << 2)
#define MPY_FEATURE_DECODE_ARCH(feat) ((feat) >> 2)
// The feature flag bits encode the compile-time config options that
// affect the generate bytecode.
#define MPY_FEATURE_FLAGS ( \
((MICROPY_OPT_CACHE_MAP_LOOKUP_IN_BYTECODE) << 0) \
| ((MICROPY_PY_BUILTINS_STR_UNICODE) << 1) \
)
// This is a version of the flags that can be configured at runtime.
#define MPY_FEATURE_FLAGS_DYNAMIC ( \
((MICROPY_OPT_CACHE_MAP_LOOKUP_IN_BYTECODE_DYNAMIC) << 0) \
| ((MICROPY_PY_BUILTINS_STR_UNICODE_DYNAMIC) << 1) \
)
// Define the host architecture
#if MICROPY_EMIT_X86
#define MPY_FEATURE_ARCH (MP_NATIVE_ARCH_X86)
#elif MICROPY_EMIT_X64
#define MPY_FEATURE_ARCH (MP_NATIVE_ARCH_X64)
#elif MICROPY_EMIT_THUMB
#define MPY_FEATURE_ARCH (MP_NATIVE_ARCH_ARMV7M)
#elif MICROPY_EMIT_ARM
#define MPY_FEATURE_ARCH (MP_NATIVE_ARCH_ARMV6)
#elif MICROPY_EMIT_XTENSA
#define MPY_FEATURE_ARCH (MP_NATIVE_ARCH_XTENSA)
#else
#define MPY_FEATURE_ARCH (MP_NATIVE_ARCH_NONE)
#endif
#if MICROPY_DYNAMIC_COMPILER
#define MPY_FEATURE_ARCH_DYNAMIC mp_dynamic_compiler.native_arch
#else
#define MPY_FEATURE_ARCH_DYNAMIC MPY_FEATURE_ARCH
#endif
#if MICROPY_PERSISTENT_CODE_LOAD || (MICROPY_PERSISTENT_CODE_SAVE && !MICROPY_DYNAMIC_COMPILER)
// The bytecode will depend on the number of bits in a small-int, and
// this function computes that (could make it a fixed constant, but it
// would need to be defined in mpconfigport.h).
STATIC int mp_small_int_bits(void) {
mp_int_t i = MP_SMALL_INT_MAX;
int n = 1;
while (i != 0) {
i >>= 1;
++n;
}
return n;
}
#endif
#define QSTR_WINDOW_SIZE (32)
typedef struct _qstr_window_t {
uint16_t idx; // indexes the head of the window
uint16_t window[QSTR_WINDOW_SIZE];
} qstr_window_t;
// Push a qstr to the head of the window, and the tail qstr is overwritten
STATIC void qstr_window_push(qstr_window_t *qw, qstr qst) {
qw->idx = (qw->idx + 1) % QSTR_WINDOW_SIZE;
qw->window[qw->idx] = qst;
}
// Pull an existing qstr from within the window to the head of the window
STATIC qstr qstr_window_pull(qstr_window_t *qw, size_t idx) {
qstr qst = qw->window[idx];
if (idx > qw->idx) {
memmove(&qw->window[idx], &qw->window[idx + 1], (QSTR_WINDOW_SIZE - idx - 1) * sizeof(uint16_t));
qw->window[QSTR_WINDOW_SIZE - 1] = qw->window[0];
idx = 0;
}
memmove(&qw->window[idx], &qw->window[idx + 1], (qw->idx - idx) * sizeof(uint16_t));
qw->window[qw->idx] = qst;
return qst;
}
#if MICROPY_PERSISTENT_CODE_LOAD
// Access a qstr at the given index, relative to the head of the window (0=head)
STATIC qstr qstr_window_access(qstr_window_t *qw, size_t idx) {
return qstr_window_pull(qw, (qw->idx + QSTR_WINDOW_SIZE - idx) % QSTR_WINDOW_SIZE);
}
#endif
#if MICROPY_PERSISTENT_CODE_SAVE
// Insert a qstr at the head of the window, either by pulling an existing one or pushing a new one
STATIC size_t qstr_window_insert(qstr_window_t *qw, qstr qst) {
for (size_t idx = 0; idx < QSTR_WINDOW_SIZE; ++idx) {
if (qw->window[idx] == qst) {
qstr_window_pull(qw, idx);
return (qw->idx + QSTR_WINDOW_SIZE - idx) % QSTR_WINDOW_SIZE;
}
}
qstr_window_push(qw, qst);
return QSTR_WINDOW_SIZE;
}
#endif
typedef struct _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;
uint code_info_size;
} bytecode_prelude_t;
// ip will point to start of opcodes
// ip2 will point to simple_name, source_file qstrs
STATIC void extract_prelude(const byte **ip, const byte **ip2, bytecode_prelude_t *prelude) {
MP_BC_PRELUDE_SIG_DECODE(*ip);
prelude->n_state = n_state;
prelude->n_exc_stack = n_exc_stack;
prelude->scope_flags = scope_flags;
prelude->n_pos_args = n_pos_args;
prelude->n_kwonly_args = n_kwonly_args;
prelude->n_def_pos_args = n_def_pos_args;
MP_BC_PRELUDE_SIZE_DECODE(*ip);
*ip2 = *ip;
*ip += n_info;
*ip += n_cell;
}
#endif // MICROPY_PERSISTENT_CODE_LOAD || MICROPY_PERSISTENT_CODE_SAVE
#if MICROPY_PERSISTENT_CODE_LOAD
#include "py/parsenum.h"
#if MICROPY_EMIT_MACHINE_CODE
#if MICROPY_EMIT_THUMB
STATIC void asm_thumb_rewrite_mov(uint8_t *pc, uint16_t val) {
// high part
*(uint16_t*)pc = (*(uint16_t*)pc & 0xfbf0) | (val >> 1 & 0x0400) | (val >> 12);
// low part
*(uint16_t*)(pc + 2) = (*(uint16_t*)(pc + 2) & 0x0f00) | (val << 4 & 0x7000) | (val & 0x00ff);
}
#endif
STATIC void arch_link_qstr(uint8_t *pc, bool is_obj, qstr qst) {
mp_uint_t val = qst;
if (is_obj) {
val = (mp_uint_t)MP_OBJ_NEW_QSTR(qst);
}
#if MICROPY_EMIT_X86 || MICROPY_EMIT_X64 || MICROPY_EMIT_ARM || MICROPY_EMIT_XTENSA
pc[0] = val & 0xff;
pc[1] = (val >> 8) & 0xff;
pc[2] = (val >> 16) & 0xff;
pc[3] = (val >> 24) & 0xff;
#elif MICROPY_EMIT_THUMB
if (is_obj) {
// qstr object, movw and movt
asm_thumb_rewrite_mov(pc, val); // movw
asm_thumb_rewrite_mov(pc + 4, val >> 16); // movt
} else {
// qstr number, movw instruction
asm_thumb_rewrite_mov(pc, val); // movw
}
#endif
}
#endif
STATIC int read_byte(mp_reader_t *reader) {
return reader->readbyte(reader->data);
}
STATIC void read_bytes(mp_reader_t *reader, byte *buf, size_t len) {
while (len-- > 0) {
*buf++ = reader->readbyte(reader->data);
}
}
STATIC size_t read_uint(mp_reader_t *reader, byte **out) {
size_t unum = 0;
for (;;) {
byte b = reader->readbyte(reader->data);
if (out != NULL) {
**out = b;
++*out;
}
unum = (unum << 7) | (b & 0x7f);
if ((b & 0x80) == 0) {
break;
}
}
return unum;
}
STATIC qstr load_qstr(mp_reader_t *reader, qstr_window_t *qw) {
size_t len = read_uint(reader, NULL);
if (len == 0) {
// static qstr
return read_byte(reader);
}
if (len & 1) {
// qstr in window
return qstr_window_access(qw, len >> 1);
}
len >>= 1;
char *str = m_new(char, len);
read_bytes(reader, (byte*)str, len);
qstr qst = qstr_from_strn(str, len);
m_del(char, str, len);
qstr_window_push(qw, qst);
return qst;
}
STATIC mp_obj_t load_obj(mp_reader_t *reader) {
byte obj_type = read_byte(reader);
if (obj_type == 'e') {
return MP_OBJ_FROM_PTR(&mp_const_ellipsis_obj);
} else {
size_t len = read_uint(reader, NULL);
vstr_t vstr;
vstr_init_len(&vstr, len);
read_bytes(reader, (byte*)vstr.buf, len);
if (obj_type == 's' || obj_type == 'b') {
return mp_obj_new_str_from_vstr(obj_type == 's' ? &mp_type_str : &mp_type_bytes, &vstr);
} else if (obj_type == 'i') {
return mp_parse_num_integer(vstr.buf, vstr.len, 10, NULL);
} else {
assert(obj_type == 'f' || obj_type == 'c');
return mp_parse_num_decimal(vstr.buf, vstr.len, obj_type == 'c', false, NULL);
}
}
}
STATIC void load_prelude(mp_reader_t *reader, byte **ip, byte **ip2, bytecode_prelude_t *prelude) {
// Read in the prelude
byte *ip_read = *ip;
read_uint(reader, &ip_read); // read in n_state/etc (is effectively a var-uint)
byte *ip_read_save = ip_read;
read_uint(reader, &ip_read); // read in n_info/n_cell (is effectively a var-uint)
MP_BC_PRELUDE_SIZE_DECODE(ip_read_save);
read_bytes(reader, ip_read, n_info + n_cell); // read remaining code info
// Entire prelude has been read into *ip, now decode and extract values from it
extract_prelude((const byte**)ip, (const byte**)ip2, prelude);
}
STATIC void load_bytecode(mp_reader_t *reader, qstr_window_t *qw, byte *ip, byte *ip_top) {
while (ip < ip_top) {
*ip = read_byte(reader);
size_t sz;
uint f = mp_opcode_format(ip, &sz, false);
++ip;
--sz;
if (f == MP_BC_FORMAT_QSTR) {
qstr qst = load_qstr(reader, qw);
*ip++ = qst;
*ip++ = qst >> 8;
sz -= 2;
} else if (f == MP_BC_FORMAT_VAR_UINT) {
while ((*ip++ = read_byte(reader)) & 0x80) {
}
}
read_bytes(reader, ip, sz);
ip += sz;
}
}
STATIC mp_raw_code_t *load_raw_code(mp_reader_t *reader, qstr_window_t *qw) {
// Load function kind and data length
size_t kind_len = read_uint(reader, NULL);
int kind = (kind_len & 3) + MP_CODE_BYTECODE;
size_t fun_data_len = kind_len >> 2;
#if !MICROPY_EMIT_MACHINE_CODE
if (kind != MP_CODE_BYTECODE) {
mp_raise_ValueError("incompatible .mpy file");
}
#endif
uint8_t *fun_data = NULL;
byte *ip2;
bytecode_prelude_t prelude = {0};
#if MICROPY_EMIT_MACHINE_CODE
size_t prelude_offset = 0;
mp_uint_t type_sig = 0;
size_t n_qstr_link = 0;
#endif
if (kind == MP_CODE_BYTECODE) {
// Allocate memory for the bytecode
fun_data = m_new(uint8_t, fun_data_len);
// Load prelude
byte *ip = fun_data;
load_prelude(reader, &ip, &ip2, &prelude);
// Load bytecode
load_bytecode(reader, qw, ip, fun_data + fun_data_len);
#if MICROPY_EMIT_MACHINE_CODE
} else {
// Allocate memory for native data and load it
size_t fun_alloc;
MP_PLAT_ALLOC_EXEC(fun_data_len, (void**)&fun_data, &fun_alloc);
read_bytes(reader, fun_data, fun_data_len);
if (kind == MP_CODE_NATIVE_PY || kind == MP_CODE_NATIVE_VIPER) {
// Parse qstr link table and link native code
n_qstr_link = read_uint(reader, NULL);
for (size_t i = 0; i < n_qstr_link; ++i) {
size_t off = read_uint(reader, NULL);
qstr qst = load_qstr(reader, qw);
uint8_t *dest = fun_data + (off >> 2);
if ((off & 3) == 0) {
// Generic 16-bit link
dest[0] = qst & 0xff;
dest[1] = (qst >> 8) & 0xff;
} else {
// Architecture-specific link
arch_link_qstr(dest, (off & 3) == 2, qst);
}
}
}
if (kind == MP_CODE_NATIVE_PY) {
// Extract prelude for later use
prelude_offset = read_uint(reader, NULL);
const byte *ip = fun_data + prelude_offset;
extract_prelude(&ip, (const byte**)&ip2, &prelude);
} else {
// Load basic scope info for viper and asm
prelude.scope_flags = read_uint(reader, NULL);
prelude.n_pos_args = 0;
prelude.n_kwonly_args = 0;
if (kind == MP_CODE_NATIVE_ASM) {
prelude.n_pos_args = read_uint(reader, NULL);
type_sig = read_uint(reader, NULL);
}
}
#endif
}
if (kind == MP_CODE_BYTECODE || kind == MP_CODE_NATIVE_PY) {
// Load qstrs in prelude
qstr simple_name = load_qstr(reader, qw);
qstr source_file = load_qstr(reader, qw);
ip2[0] = simple_name; ip2[1] = simple_name >> 8;
ip2[2] = source_file; ip2[3] = source_file >> 8;
}
size_t n_obj = 0;
size_t n_raw_code = 0;
mp_uint_t *const_table = NULL;
if (kind != MP_CODE_NATIVE_ASM) {
// Load constant table for bytecode, native and viper
// Number of entries in constant table
n_obj = read_uint(reader, NULL);
n_raw_code = read_uint(reader, NULL);
// Allocate constant table
size_t n_alloc = prelude.n_pos_args + prelude.n_kwonly_args + n_obj + n_raw_code;
if (kind != MP_CODE_BYTECODE) {
++n_alloc; // additional entry for mp_fun_table
}
const_table = m_new(mp_uint_t, n_alloc);
mp_uint_t *ct = const_table;
// Load function argument names (initial entries in const_table)
// (viper has n_pos_args=n_kwonly_args=0 so doesn't load any qstrs here)
for (size_t i = 0; i < prelude.n_pos_args + prelude.n_kwonly_args; ++i) {
*ct++ = (mp_uint_t)MP_OBJ_NEW_QSTR(load_qstr(reader, qw));
}
#if MICROPY_EMIT_MACHINE_CODE
if (kind != MP_CODE_BYTECODE) {
// Populate mp_fun_table entry
*ct++ = (mp_uint_t)(uintptr_t)mp_fun_table;
}
#endif
// Load constant objects and raw code children
for (size_t i = 0; i < n_obj; ++i) {
*ct++ = (mp_uint_t)load_obj(reader);
}
for (size_t i = 0; i < n_raw_code; ++i) {
*ct++ = (mp_uint_t)(uintptr_t)load_raw_code(reader, qw);
}
}
// Create raw_code and return it
mp_raw_code_t *rc = mp_emit_glue_new_raw_code();
if (kind == MP_CODE_BYTECODE) {
mp_emit_glue_assign_bytecode(rc, fun_data,
#if MICROPY_PERSISTENT_CODE_SAVE || MICROPY_DEBUG_PRINTERS
fun_data_len,
#endif
const_table,
#if MICROPY_PERSISTENT_CODE_SAVE
n_obj, n_raw_code,
#endif
prelude.scope_flags);
#if MICROPY_EMIT_MACHINE_CODE
} else {
#if defined(MP_PLAT_COMMIT_EXEC)
fun_data = MP_PLAT_COMMIT_EXEC(fun_data, fun_data_len);
#endif
mp_emit_glue_assign_native(rc, kind,
fun_data, fun_data_len, const_table,
#if MICROPY_PERSISTENT_CODE_SAVE
prelude_offset,
n_obj, n_raw_code,
n_qstr_link, NULL,
#endif
prelude.n_pos_args, prelude.scope_flags, type_sig);
#endif
}
return rc;
}
mp_raw_code_t *mp_raw_code_load(mp_reader_t *reader) {
byte header[4];
read_bytes(reader, header, sizeof(header));
if (header[0] != 'M'
|| header[1] != MPY_VERSION
|| MPY_FEATURE_DECODE_FLAGS(header[2]) != MPY_FEATURE_FLAGS
|| header[3] > mp_small_int_bits()
|| read_uint(reader, NULL) > QSTR_WINDOW_SIZE) {
mp_raise_ValueError("incompatible .mpy file");
}
if (MPY_FEATURE_DECODE_ARCH(header[2]) != MP_NATIVE_ARCH_NONE
&& MPY_FEATURE_DECODE_ARCH(header[2]) != MPY_FEATURE_ARCH) {
mp_raise_ValueError("incompatible .mpy arch");
}
qstr_window_t qw;
qw.idx = 0;
mp_raw_code_t *rc = load_raw_code(reader, &qw);
reader->close(reader->data);
return rc;
}
mp_raw_code_t *mp_raw_code_load_mem(const byte *buf, size_t len) {
mp_reader_t reader;
mp_reader_new_mem(&reader, buf, len, 0);
return mp_raw_code_load(&reader);
}
#if MICROPY_HAS_FILE_READER
mp_raw_code_t *mp_raw_code_load_file(const char *filename) {
mp_reader_t reader;
mp_reader_new_file(&reader, filename);
return mp_raw_code_load(&reader);
}
#endif // MICROPY_HAS_FILE_READER
#endif // MICROPY_PERSISTENT_CODE_LOAD
#if MICROPY_PERSISTENT_CODE_SAVE
#include "py/objstr.h"
STATIC void mp_print_bytes(mp_print_t *print, const byte *data, size_t len) {
print->print_strn(print->data, (const char*)data, len);
}
#define BYTES_FOR_INT ((BYTES_PER_WORD * 8 + 6) / 7)
STATIC void mp_print_uint(mp_print_t *print, size_t n) {
byte buf[BYTES_FOR_INT];
byte *p = buf + sizeof(buf);
*--p = n & 0x7f;
n >>= 7;
for (; n != 0; n >>= 7) {
*--p = 0x80 | (n & 0x7f);
}
print->print_strn(print->data, (char*)p, buf + sizeof(buf) - p);
}
STATIC void save_qstr(mp_print_t *print, qstr_window_t *qw, qstr qst) {
if (qst <= QSTR_LAST_STATIC) {
// encode static qstr
byte buf[2] = {0, qst & 0xff};
mp_print_bytes(print, buf, 2);
return;
}
size_t idx = qstr_window_insert(qw, qst);
if (idx < QSTR_WINDOW_SIZE) {
// qstr found in window, encode index to it
mp_print_uint(print, idx << 1 | 1);
return;
}
size_t len;
const byte *str = qstr_data(qst, &len);
mp_print_uint(print, len << 1);
mp_print_bytes(print, str, len);
}
STATIC void save_obj(mp_print_t *print, mp_obj_t o) {
if (mp_obj_is_str_or_bytes(o)) {
byte obj_type;
if (mp_obj_is_str(o)) {
obj_type = 's';
} else {
obj_type = 'b';
}
size_t len;
const char *str = mp_obj_str_get_data(o, &len);
mp_print_bytes(print, &obj_type, 1);
mp_print_uint(print, len);
mp_print_bytes(print, (const byte*)str, len);
} else if (MP_OBJ_TO_PTR(o) == &mp_const_ellipsis_obj) {
byte obj_type = 'e';
mp_print_bytes(print, &obj_type, 1);
} else {
// we save numbers using a simplistic text representation
// TODO could be improved
byte obj_type;
if (mp_obj_is_type(o, &mp_type_int)) {
obj_type = 'i';
#if MICROPY_PY_BUILTINS_COMPLEX
} else if (mp_obj_is_type(o, &mp_type_complex)) {
obj_type = 'c';
#endif
} else {
assert(mp_obj_is_float(o));
obj_type = 'f';
}
vstr_t vstr;
mp_print_t pr;
vstr_init_print(&vstr, 10, &pr);
mp_obj_print_helper(&pr, o, PRINT_REPR);
mp_print_bytes(print, &obj_type, 1);
mp_print_uint(print, vstr.len);
mp_print_bytes(print, (const byte*)vstr.buf, vstr.len);
vstr_clear(&vstr);
}
}
STATIC void save_bytecode(mp_print_t *print, qstr_window_t *qw, const byte *ip, const byte *ip_top) {
while (ip < ip_top) {
size_t sz;
uint f = mp_opcode_format(ip, &sz, true);
if (f == MP_BC_FORMAT_QSTR) {
mp_print_bytes(print, ip, 1);
qstr qst = ip[1] | (ip[2] << 8);
save_qstr(print, qw, qst);
ip += 3;
sz -= 3;
}
mp_print_bytes(print, ip, sz);
ip += sz;
}
}
STATIC void save_raw_code(mp_print_t *print, mp_raw_code_t *rc, qstr_window_t *qstr_window) {
// Save function kind and data length
mp_print_uint(print, (rc->fun_data_len << 2) | (rc->kind - MP_CODE_BYTECODE));
const byte *ip2;
bytecode_prelude_t prelude;
if (rc->kind == MP_CODE_BYTECODE) {
// Save prelude
const byte *ip = rc->fun_data;
extract_prelude(&ip, &ip2, &prelude);
size_t prelude_len = ip - (const byte*)rc->fun_data;
const byte *ip_top = (const byte*)rc->fun_data + rc->fun_data_len;
mp_print_bytes(print, rc->fun_data, prelude_len);
// Save bytecode
save_bytecode(print, qstr_window, ip, ip_top);
#if MICROPY_EMIT_MACHINE_CODE
} else {
// Save native code
mp_print_bytes(print, rc->fun_data, rc->fun_data_len);
if (rc->kind == MP_CODE_NATIVE_PY || rc->kind == MP_CODE_NATIVE_VIPER) {
// Save qstr link table for native code
mp_print_uint(print, rc->n_qstr);
for (size_t i = 0; i < rc->n_qstr; ++i) {
mp_print_uint(print, rc->qstr_link[i].off);
save_qstr(print, qstr_window, rc->qstr_link[i].qst);
}
}
if (rc->kind == MP_CODE_NATIVE_PY) {
// Save prelude size, and extract prelude for later use
mp_print_uint(print, rc->prelude_offset);
const byte *ip = (const byte*)rc->fun_data + rc->prelude_offset;
extract_prelude(&ip, &ip2, &prelude);
} else {
// Save basic scope info for viper and asm
mp_print_uint(print, rc->scope_flags);
prelude.n_pos_args = 0;
prelude.n_kwonly_args = 0;
if (rc->kind == MP_CODE_NATIVE_ASM) {
mp_print_uint(print, rc->n_pos_args);
mp_print_uint(print, rc->type_sig);
}
}
#endif
}
if (rc->kind == MP_CODE_BYTECODE || rc->kind == MP_CODE_NATIVE_PY) {
// Save qstrs in prelude
save_qstr(print, qstr_window, ip2[0] | (ip2[1] << 8)); // simple_name
save_qstr(print, qstr_window, ip2[2] | (ip2[3] << 8)); // source_file
}
if (rc->kind != MP_CODE_NATIVE_ASM) {
// Save constant table for bytecode, native and viper
// Number of entries in constant table
mp_print_uint(print, rc->n_obj);
mp_print_uint(print, rc->n_raw_code);
const mp_uint_t *const_table = rc->const_table;
// Save function argument names (initial entries in const_table)
// (viper has n_pos_args=n_kwonly_args=0 so doesn't save any qstrs here)
for (size_t i = 0; i < prelude.n_pos_args + prelude.n_kwonly_args; ++i) {
mp_obj_t o = (mp_obj_t)*const_table++;
save_qstr(print, qstr_window, MP_OBJ_QSTR_VALUE(o));
}
if (rc->kind != MP_CODE_BYTECODE) {
// Skip saving mp_fun_table entry
++const_table;
}
// Save constant objects and raw code children
for (size_t i = 0; i < rc->n_obj; ++i) {
save_obj(print, (mp_obj_t)*const_table++);
}
for (size_t i = 0; i < rc->n_raw_code; ++i) {
save_raw_code(print, (mp_raw_code_t*)(uintptr_t)*const_table++, qstr_window);
}
}
}
STATIC bool mp_raw_code_has_native(mp_raw_code_t *rc) {
if (rc->kind != MP_CODE_BYTECODE) {
return true;
}
const byte *ip = rc->fun_data;
const byte *ip2;
bytecode_prelude_t prelude;
extract_prelude(&ip, &ip2, &prelude);
const mp_uint_t *const_table = rc->const_table
+ prelude.n_pos_args + prelude.n_kwonly_args
+ rc->n_obj;
for (size_t i = 0; i < rc->n_raw_code; ++i) {
if (mp_raw_code_has_native((mp_raw_code_t*)(uintptr_t)*const_table++)) {
return true;
}
}
return false;
}
void mp_raw_code_save(mp_raw_code_t *rc, mp_print_t *print) {
// header contains:
// byte 'M'
// byte version
// byte feature flags
// byte number of bits in a small int
// uint size of qstr window
byte header[4] = {
'M',
MPY_VERSION,
MPY_FEATURE_ENCODE_FLAGS(MPY_FEATURE_FLAGS_DYNAMIC),
#if MICROPY_DYNAMIC_COMPILER
mp_dynamic_compiler.small_int_bits,
#else
mp_small_int_bits(),
#endif
};
if (mp_raw_code_has_native(rc)) {
header[2] |= MPY_FEATURE_ENCODE_ARCH(MPY_FEATURE_ARCH_DYNAMIC);
}
mp_print_bytes(print, header, sizeof(header));
mp_print_uint(print, QSTR_WINDOW_SIZE);
qstr_window_t qw;
qw.idx = 0;
memset(qw.window, 0, sizeof(qw.window));
save_raw_code(print, rc, &qw);
}
// here we define mp_raw_code_save_file depending on the port
// TODO abstract this away properly
#if defined(__i386__) || defined(__x86_64__) || defined(_WIN32) || defined(__unix__)
#include <unistd.h>
#include <sys/stat.h>
#include <fcntl.h>
STATIC void fd_print_strn(void *env, const char *str, size_t len) {
int fd = (intptr_t)env;
ssize_t ret = write(fd, str, len);
(void)ret;
}
void mp_raw_code_save_file(mp_raw_code_t *rc, const char *filename) {
int fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0644);
mp_print_t fd_print = {(void*)(intptr_t)fd, fd_print_strn};
mp_raw_code_save(rc, &fd_print);
close(fd);
}
#else
#error mp_raw_code_save_file not implemented for this platform
#endif
#endif // MICROPY_PERSISTENT_CODE_SAVE
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