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circuitpython/py/emitglue.c
Damien George 999cedb90f py: Wrap all obj-ptr conversions in MP_OBJ_TO_PTR/MP_OBJ_FROM_PTR. 
This allows the mp_obj_t type to be configured to something other than a
pointer-sized primitive type.

This patch also includes additional changes to allow the code to compile
when sizeof(mp_uint_t) != sizeof(void*), such as using size_t instead of
mp_uint_t, and various casts.
2015-11-29 14:25:35 +00:00

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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013, 2014 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.
*/
// This code glues the code emitters to the runtime.
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include "py/emitglue.h"
#include "py/runtime0.h"
#include "py/bc.h"
#if 0 // print debugging info
#define DEBUG_PRINT (1)
#define WRITE_CODE (1)
#define DEBUG_printf DEBUG_printf
#define DEBUG_OP_printf(...) DEBUG_printf(__VA_ARGS__)
#else // don't print debugging info
#define DEBUG_printf(...) (void)0
#define DEBUG_OP_printf(...) (void)0
#endif
#if MICROPY_DEBUG_PRINTERS
mp_uint_t mp_verbose_flag = 0;
#endif
struct _mp_raw_code_t {
mp_raw_code_kind_t kind : 3;
mp_uint_t scope_flags : 7;
mp_uint_t n_pos_args : 11;
union {
struct {
const byte *bytecode;
const mp_uint_t *const_table;
#if MICROPY_PERSISTENT_CODE_SAVE
mp_uint_t bc_len;
uint16_t n_obj;
uint16_t n_raw_code;
#endif
} u_byte;
struct {
void *fun_data;
const mp_uint_t *const_table;
mp_uint_t type_sig; // for viper, compressed as 2-bit types; ret is MSB, then arg0, arg1, etc
} u_native;
} data;
};
mp_raw_code_t *mp_emit_glue_new_raw_code(void) {
mp_raw_code_t *rc = m_new0(mp_raw_code_t, 1);
rc->kind = MP_CODE_RESERVED;
return rc;
}
void mp_emit_glue_assign_bytecode(mp_raw_code_t *rc, const byte *code, mp_uint_t len,
const mp_uint_t *const_table,
#if MICROPY_PERSISTENT_CODE_SAVE
uint16_t n_obj, uint16_t n_raw_code,
#endif
mp_uint_t scope_flags) {
rc->kind = MP_CODE_BYTECODE;
rc->scope_flags = scope_flags;
rc->data.u_byte.bytecode = code;
rc->data.u_byte.const_table = const_table;
#if MICROPY_PERSISTENT_CODE_SAVE
rc->data.u_byte.bc_len = len;
rc->data.u_byte.n_obj = n_obj;
rc->data.u_byte.n_raw_code = n_raw_code;
#endif
#ifdef DEBUG_PRINT
DEBUG_printf("assign byte code: code=%p len=" UINT_FMT " flags=%x\n", code, len, (uint)scope_flags);
#endif
#if MICROPY_DEBUG_PRINTERS
if (mp_verbose_flag >= 2) {
mp_bytecode_print(rc, code, len, const_table);
}
#endif
}
#if MICROPY_EMIT_NATIVE || MICROPY_EMIT_INLINE_THUMB
void mp_emit_glue_assign_native(mp_raw_code_t *rc, mp_raw_code_kind_t kind, void *fun_data, mp_uint_t fun_len, const mp_uint_t *const_table, mp_uint_t n_pos_args, mp_uint_t scope_flags, mp_uint_t type_sig) {
assert(kind == MP_CODE_NATIVE_PY || kind == MP_CODE_NATIVE_VIPER || kind == MP_CODE_NATIVE_ASM);
rc->kind = kind;
rc->scope_flags = scope_flags;
rc->n_pos_args = n_pos_args;
rc->data.u_native.fun_data = fun_data;
rc->data.u_native.const_table = const_table;
rc->data.u_native.type_sig = type_sig;
#ifdef DEBUG_PRINT
DEBUG_printf("assign native: kind=%d fun=%p len=" UINT_FMT " n_pos_args=" UINT_FMT " flags=%x\n", kind, fun_data, fun_len, n_pos_args, (uint)scope_flags);
for (mp_uint_t i = 0; i < fun_len; i++) {
if (i > 0 && i % 16 == 0) {
DEBUG_printf("\n");
}
DEBUG_printf(" %02x", ((byte*)fun_data)[i]);
}
DEBUG_printf("\n");
#ifdef WRITE_CODE
FILE *fp_write_code = fopen("out-code", "wb");
fwrite(fun_data, fun_len, 1, fp_write_code);
fclose(fp_write_code);
#endif
#else
(void)fun_len;
#endif
}
#endif
mp_obj_t mp_make_function_from_raw_code(mp_raw_code_t *rc, mp_obj_t def_args, mp_obj_t def_kw_args) {
DEBUG_OP_printf("make_function_from_raw_code %p\n", rc);
assert(rc != NULL);
// def_args must be MP_OBJ_NULL or a tuple
assert(def_args == MP_OBJ_NULL || MP_OBJ_IS_TYPE(def_args, &mp_type_tuple));
// def_kw_args must be MP_OBJ_NULL or a dict
assert(def_kw_args == MP_OBJ_NULL || MP_OBJ_IS_TYPE(def_kw_args, &mp_type_dict));
// make the function, depending on the raw code kind
mp_obj_t fun;
switch (rc->kind) {
case MP_CODE_BYTECODE:
no_other_choice:
fun = mp_obj_new_fun_bc(def_args, def_kw_args, rc->data.u_byte.bytecode, rc->data.u_byte.const_table);
break;
#if MICROPY_EMIT_NATIVE
case MP_CODE_NATIVE_PY:
fun = mp_obj_new_fun_native(def_args, def_kw_args, rc->data.u_native.fun_data, rc->data.u_native.const_table);
break;
case MP_CODE_NATIVE_VIPER:
fun = mp_obj_new_fun_viper(rc->n_pos_args, rc->data.u_native.fun_data, rc->data.u_native.type_sig);
break;
#endif
#if MICROPY_EMIT_INLINE_THUMB
case MP_CODE_NATIVE_ASM:
fun = mp_obj_new_fun_asm(rc->n_pos_args, rc->data.u_native.fun_data);
break;
#endif
default:
// raw code was never set (this should not happen)
assert(0);
goto no_other_choice; // to help flow control analysis
}
// check for generator functions and if so wrap in generator object
if ((rc->scope_flags & MP_SCOPE_FLAG_GENERATOR) != 0) {
fun = mp_obj_new_gen_wrap(fun);
}
return fun;
}
mp_obj_t mp_make_closure_from_raw_code(mp_raw_code_t *rc, mp_uint_t n_closed_over, const mp_obj_t *args) {
DEBUG_OP_printf("make_closure_from_raw_code %p " UINT_FMT " %p\n", rc, n_closed_over, args);
// make function object
mp_obj_t ffun;
if (n_closed_over & 0x100) {
// default positional and keyword args given
ffun = mp_make_function_from_raw_code(rc, args[0], args[1]);
} else {
// default positional and keyword args not given
ffun = mp_make_function_from_raw_code(rc, MP_OBJ_NULL, MP_OBJ_NULL);
}
// wrap function in closure object
return mp_obj_new_closure(ffun, n_closed_over & 0xff, args + ((n_closed_over >> 7) & 2));
}
#if MICROPY_PERSISTENT_CODE
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) {
prelude->n_state = mp_decode_uint(ip);
prelude->n_exc_stack = mp_decode_uint(ip);
prelude->scope_flags = *(*ip)++;
prelude->n_pos_args = *(*ip)++;
prelude->n_kwonly_args = *(*ip)++;
prelude->n_def_pos_args = *(*ip)++;
*ip2 = *ip;
prelude->code_info_size = mp_decode_uint(ip2);
*ip += prelude->code_info_size;
while (*(*ip)++ != 255) {
}
}
#endif // MICROPY_PERSISTENT_CODE
#if MICROPY_PERSISTENT_CODE_LOAD
#include "py/parsenum.h"
#include "py/bc0.h"
STATIC int read_byte(mp_reader_t *reader) {
return reader->read_byte(reader->data);
}
STATIC void read_bytes(mp_reader_t *reader, byte *buf, size_t len) {
while (len-- > 0) {
*buf++ = reader->read_byte(reader->data);
}
}
STATIC mp_uint_t read_uint(mp_reader_t *reader) {
mp_uint_t unum = 0;
for (;;) {
byte b = reader->read_byte(reader->data);
unum = (unum << 7) | (b & 0x7f);
if ((b & 0x80) == 0) {
break;
}
}
return unum;
}
STATIC qstr load_qstr(mp_reader_t *reader) {
mp_uint_t len = read_uint(reader);
char *str = m_new(char, len);
read_bytes(reader, (byte*)str, len);
qstr qst = qstr_from_strn(str, len);
m_del(char, str, len);
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);
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_bytecode_qstrs(mp_reader_t *reader, byte *ip, byte *ip_top) {
while (ip < ip_top) {
size_t sz;
uint f = mp_opcode_format(ip, &sz);
if (f == MP_OPCODE_QSTR) {
qstr qst = load_qstr(reader);
ip[1] = qst;
ip[2] = qst >> 8;
}
ip += sz;
}
}
STATIC mp_raw_code_t *load_raw_code(mp_reader_t *reader) {
// load bytecode
mp_uint_t bc_len = read_uint(reader);
byte *bytecode = m_new(byte, bc_len);
read_bytes(reader, bytecode, bc_len);
// extract prelude
const byte *ip = bytecode;
const byte *ip2;
bytecode_prelude_t prelude;
extract_prelude(&ip, &ip2, &prelude);
// load qstrs and link global qstr ids into bytecode
qstr simple_name = load_qstr(reader);
qstr source_file = load_qstr(reader);
((byte*)ip2)[0] = simple_name; ((byte*)ip2)[1] = simple_name >> 8;
((byte*)ip2)[2] = source_file; ((byte*)ip2)[3] = source_file >> 8;
load_bytecode_qstrs(reader, (byte*)ip, bytecode + bc_len);
// load constant table
mp_uint_t n_obj = read_uint(reader);
mp_uint_t n_raw_code = read_uint(reader);
mp_uint_t *const_table = m_new(mp_uint_t, prelude.n_pos_args + prelude.n_kwonly_args + n_obj + n_raw_code);
mp_uint_t *ct = const_table;
for (mp_uint_t i = 0; i < prelude.n_pos_args + prelude.n_kwonly_args; ++i) {
*ct++ = (mp_uint_t)MP_OBJ_NEW_QSTR(load_qstr(reader));
}
for (mp_uint_t i = 0; i < n_obj; ++i) {
*ct++ = (mp_uint_t)load_obj(reader);
}
for (mp_uint_t i = 0; i < n_raw_code; ++i) {
*ct++ = (mp_uint_t)(uintptr_t)load_raw_code(reader);
}
// create raw_code and return it
mp_raw_code_t *rc = mp_emit_glue_new_raw_code();
mp_emit_glue_assign_bytecode(rc, bytecode, bc_len, const_table,
#if MICROPY_PERSISTENT_CODE_SAVE
n_obj, n_raw_code,
#endif
prelude.scope_flags);
return rc;
}
mp_raw_code_t *mp_raw_code_load(mp_reader_t *reader) {
byte header[3];
read_bytes(reader, header, 3);
if (strncmp((char*)header, "M\x00", 2) != 0) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError,
"invalid .mpy file"));
}
if (header[2] != MICROPY_OPT_CACHE_MAP_LOOKUP_IN_BYTECODE) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError,
"incompatible .mpy file"));
}
return load_raw_code(reader);
}
typedef struct _mp_mem_reader_t {
const byte *cur;
const byte *end;
} mp_mem_reader_t;
STATIC mp_uint_t mp_mem_reader_next_byte(void *br_in) {
mp_mem_reader_t *br = br_in;
if (br->cur < br->end) {
return *br->cur++;
} else {
return (mp_uint_t)-1;
}
}
mp_raw_code_t *mp_raw_code_load_mem(const byte *buf, size_t len) {
mp_mem_reader_t mr = {buf, buf + len};
mp_reader_t reader = {&mr, mp_mem_reader_next_byte};
return mp_raw_code_load(&reader);
}
// here we define mp_raw_code_load_file depending on the port
// TODO abstract this away properly
#if defined(__i386__) || defined(__x86_64__)
// unix file reader
#include <sys/stat.h>
#include <fcntl.h>
typedef struct _mp_lexer_file_buf_t {
int fd;
byte buf[20];
mp_uint_t len;
mp_uint_t pos;
} mp_lexer_file_buf_t;
STATIC mp_uint_t file_buf_next_byte(void *fb_in) {
mp_lexer_file_buf_t *fb = fb_in;
if (fb->pos >= fb->len) {
if (fb->len == 0) {
return (mp_uint_t)-1;
} else {
int n = read(fb->fd, fb->buf, sizeof(fb->buf));
if (n <= 0) {
fb->len = 0;
return (mp_uint_t)-1;
}
fb->len = n;
fb->pos = 0;
}
}
return fb->buf[fb->pos++];
}
mp_raw_code_t *mp_raw_code_load_file(const char *filename) {
mp_lexer_file_buf_t fb;
fb.fd = open(filename, O_RDONLY, 0644);
int n = read(fb.fd, fb.buf, sizeof(fb.buf));
fb.len = n;
fb.pos = 0;
mp_reader_t reader;
reader.data = &fb;
reader.read_byte = file_buf_next_byte;
mp_raw_code_t *rc = mp_raw_code_load(&reader);
close(fb.fd);
return rc;
}
#elif defined(__thumb2__)
// fatfs file reader (assume thumb2 arch uses fatfs...)
#include "lib/fatfs/ff.h"
typedef struct _mp_lexer_file_buf_t {
FIL fp;
byte buf[20];
uint16_t len;
uint16_t pos;
} mp_lexer_file_buf_t;
STATIC mp_uint_t file_buf_next_byte(void *fb_in) {
mp_lexer_file_buf_t *fb = fb_in;
if (fb->pos >= fb->len) {
if (fb->len < sizeof(fb->buf)) {
return (mp_uint_t)-1;
} else {
UINT n;
f_read(&fb->fp, fb->buf, sizeof(fb->buf), &n);
if (n == 0) {
return (mp_uint_t)-1;
}
fb->len = n;
fb->pos = 0;
}
}
return fb->buf[fb->pos++];
}
mp_raw_code_t *mp_raw_code_load_file(const char *filename) {
mp_lexer_file_buf_t fb;
/*FRESULT res =*/ f_open(&fb.fp, filename, FA_READ);
UINT n;
f_read(&fb.fp, fb.buf, sizeof(fb.buf), &n);
fb.len = n;
fb.pos = 0;
mp_reader_t reader;
reader.data = &fb;
reader.read_byte = file_buf_next_byte;
mp_raw_code_t *rc = mp_raw_code_load(&reader);
f_close(&fb.fp);
return rc;
}
#endif
#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, mp_uint_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 qst) {
size_t len;
const byte *str = qstr_data(qst, &len);
mp_print_uint(print, len);
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';
}
mp_uint_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';
} else if (MP_OBJ_IS_TYPE(o, &mp_type_float)) {
obj_type = 'f';
} else {
assert(MP_OBJ_IS_TYPE(o, &mp_type_complex));
obj_type = 'c';
}
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_qstrs(mp_print_t *print, const byte *ip, const byte *ip_top) {
while (ip < ip_top) {
size_t sz;
uint f = mp_opcode_format(ip, &sz);
if (f == MP_OPCODE_QSTR) {
qstr qst = ip[1] | (ip[2] << 8);
save_qstr(print, qst);
}
ip += sz;
}
}
STATIC void save_raw_code(mp_print_t *print, mp_raw_code_t *rc) {
if (rc->kind != MP_CODE_BYTECODE) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError,
"can only save bytecode"));
}
// save bytecode
mp_print_uint(print, rc->data.u_byte.bc_len);
mp_print_bytes(print, rc->data.u_byte.bytecode, rc->data.u_byte.bc_len);
// extract prelude
const byte *ip = rc->data.u_byte.bytecode;
const byte *ip2;
bytecode_prelude_t prelude;
extract_prelude(&ip, &ip2, &prelude);
// save qstrs
save_qstr(print, ip2[0] | (ip2[1] << 8)); // simple_name
save_qstr(print, ip2[2] | (ip2[3] << 8)); // source_file
save_bytecode_qstrs(print, ip, rc->data.u_byte.bytecode + rc->data.u_byte.bc_len);
// save constant table
mp_print_uint(print, rc->data.u_byte.n_obj);
mp_print_uint(print, rc->data.u_byte.n_raw_code);
const mp_uint_t *const_table = rc->data.u_byte.const_table;
for (uint i = 0; i < prelude.n_pos_args + prelude.n_kwonly_args; ++i) {
mp_obj_t o = (mp_obj_t)*const_table++;
save_qstr(print, MP_OBJ_QSTR_VALUE(o));
}
for (uint i = 0; i < rc->data.u_byte.n_obj; ++i) {
save_obj(print, (mp_obj_t)*const_table++);
}
for (uint i = 0; i < rc->data.u_byte.n_raw_code; ++i) {
save_raw_code(print, (mp_raw_code_t*)(uintptr_t)*const_table++);
}
}
void mp_raw_code_save(mp_raw_code_t *rc, mp_print_t *print) {
// header contains:
// byte 'M'
// byte version
// byte feature flags (right now just OPT_CACHE_MAP_LOOKUP_IN_BYTECODE)
byte header[3] = {'M', 0, MICROPY_OPT_CACHE_MAP_LOOKUP_IN_BYTECODE};
mp_print_bytes(print, header, 3);
save_raw_code(print, rc);
}
// here we define mp_raw_code_save_file depending on the port
// TODO abstract this away properly
#if defined(__i386__) || defined(__x86_64__)
#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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