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micropython/py/modsys.c

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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013, 2014 Damien P. George
* Copyright (c) 2014-2017 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.
*/
#include "py/builtin.h"
#include "py/objlist.h"
#include "py/objmodule.h"
#include "py/objtuple.h"
#include "py/objstr.h"
#include "py/objint.h"
#include "py/objtype.h"
#include "py/stream.h"
#include "py/smallint.h"
#include "py/runtime.h"
#include "py/persistentcode.h"
#include "extmod/modplatform.h"
#include "genhdr/mpversion.h"
#if MICROPY_PY_SYS_SETTRACE
#include "py/objmodule.h"
#include "py/profile.h"
#endif
#if MICROPY_PY_SYS
// defined per port; type of these is irrelevant, just need pointer
extern struct _mp_dummy_t mp_sys_stdin_obj;
extern struct _mp_dummy_t mp_sys_stdout_obj;
extern struct _mp_dummy_t mp_sys_stderr_obj;
#if MICROPY_PY_IO && MICROPY_PY_SYS_STDFILES
const mp_print_t mp_sys_stdout_print = {&mp_sys_stdout_obj, mp_stream_write_adaptor};
#endif
// version - Python language version that this implementation conforms to, as a string
STATIC const MP_DEFINE_STR_OBJ(mp_sys_version_obj, "3.4.0; " MICROPY_BANNER_NAME_AND_VERSION);
// version_info - Python language version that this implementation conforms to, as a tuple of ints
// TODO: CPython is now at 5-element array (major, minor, micro, releaselevel, serial), but save 2 els so far...
STATIC const mp_rom_obj_tuple_t mp_sys_version_info_obj = {{&mp_type_tuple}, 3, {MP_ROM_INT(3), MP_ROM_INT(4), MP_ROM_INT(0)}};
// sys.implementation object
// this holds the MicroPython version
STATIC const mp_rom_obj_tuple_t mp_sys_implementation_version_info_obj = {
{&mp_type_tuple},
4,
{
MP_ROM_INT(MICROPY_VERSION_MAJOR),
MP_ROM_INT(MICROPY_VERSION_MINOR),
MP_ROM_INT(MICROPY_VERSION_MICRO),
#if MICROPY_VERSION_PRERELEASE
MP_ROM_QSTR(MP_QSTR_preview),
#else
MP_ROM_QSTR(MP_QSTR_),
#endif
}
};
STATIC const MP_DEFINE_STR_OBJ(mp_sys_implementation_machine_obj, MICROPY_BANNER_MACHINE);
#define SYS_IMPLEMENTATION_ELEMS_BASE \
MP_ROM_QSTR(MP_QSTR_micropython), \
MP_ROM_PTR(&mp_sys_implementation_version_info_obj), \
MP_ROM_PTR(&mp_sys_implementation_machine_obj)
#if MICROPY_PERSISTENT_CODE_LOAD
#define SYS_IMPLEMENTATION_ELEMS__MPY \
, MP_ROM_INT(MPY_FILE_HEADER_INT)
#else
#define SYS_IMPLEMENTATION_ELEMS__MPY
#endif
#if MICROPY_PY_ATTRTUPLE
#if MICROPY_PREVIEW_VERSION_2
#define SYS_IMPLEMENTATION_ELEMS__V2 \
, MP_ROM_TRUE
#else
#define SYS_IMPLEMENTATION_ELEMS__V2
#endif
STATIC const qstr impl_fields[] = {
MP_QSTR_name,
MP_QSTR_version,
MP_QSTR__machine,
#if MICROPY_PERSISTENT_CODE_LOAD
MP_QSTR__mpy,
#endif
#if MICROPY_PREVIEW_VERSION_2
MP_QSTR__v2,
#endif
};
STATIC MP_DEFINE_ATTRTUPLE(
mp_sys_implementation_obj,
impl_fields,
3 + MICROPY_PERSISTENT_CODE_LOAD + MICROPY_PREVIEW_VERSION_2,
SYS_IMPLEMENTATION_ELEMS_BASE
SYS_IMPLEMENTATION_ELEMS__MPY
SYS_IMPLEMENTATION_ELEMS__V2
);
#else
STATIC const mp_rom_obj_tuple_t mp_sys_implementation_obj = {
{&mp_type_tuple},
3 + MICROPY_PERSISTENT_CODE_LOAD,
// Do not include SYS_IMPLEMENTATION_ELEMS__V2 because
// SYS_IMPLEMENTATION_ELEMS__MPY may be empty if
// MICROPY_PERSISTENT_CODE_LOAD is disabled, which means they'll share
// the same index. Cannot query _v2 if MICROPY_PY_ATTRTUPLE is
// disabled.
{
SYS_IMPLEMENTATION_ELEMS_BASE
SYS_IMPLEMENTATION_ELEMS__MPY
}
};
#endif
#undef I
#ifdef MICROPY_PY_SYS_PLATFORM
// platform - the platform that MicroPython is running on
STATIC const MP_DEFINE_STR_OBJ(mp_sys_platform_obj, MICROPY_PY_SYS_PLATFORM);
#endif
#ifdef MICROPY_PY_SYS_EXECUTABLE
// executable - the path to the micropython binary
// This object is non-const and is populated at startup in main()
MP_DEFINE_STR_OBJ(mp_sys_executable_obj, "");
#endif
#if MICROPY_PY_SYS_INTERN
MP_DEFINE_CONST_FUN_OBJ_1(mp_sys_intern_obj, mp_obj_str_intern_checked);
#endif
// exit([retval]): raise SystemExit, with optional argument given to the exception
STATIC mp_obj_t mp_sys_exit(size_t n_args, const mp_obj_t *args) {
if (n_args == 0) {
mp_raise_type(&mp_type_SystemExit);
} else {
mp_raise_type_arg(&mp_type_SystemExit, args[0]);
}
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_sys_exit_obj, 0, 1, mp_sys_exit);
STATIC mp_obj_t mp_sys_print_exception(size_t n_args, const mp_obj_t *args) {
#if MICROPY_PY_IO && MICROPY_PY_SYS_STDFILES
void *stream_obj = &mp_sys_stdout_obj;
if (n_args > 1) {
mp_get_stream_raise(args[1], MP_STREAM_OP_WRITE);
stream_obj = MP_OBJ_TO_PTR(args[1]);
}
mp_print_t print = {stream_obj, mp_stream_write_adaptor};
mp_obj_print_exception(&print, args[0]);
#else
(void)n_args;
mp_obj_print_exception(&mp_plat_print, args[0]);
#endif
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_sys_print_exception_obj, 1, 2, mp_sys_print_exception);
#if MICROPY_PY_SYS_EXC_INFO
STATIC mp_obj_t mp_sys_exc_info(void) {
mp_obj_t cur_exc = MP_OBJ_FROM_PTR(MP_STATE_VM(cur_exception));
mp_obj_tuple_t *t = MP_OBJ_TO_PTR(mp_obj_new_tuple(3, NULL));
if (cur_exc == MP_OBJ_NULL) {
t->items[0] = mp_const_none;
t->items[1] = mp_const_none;
t->items[2] = mp_const_none;
return MP_OBJ_FROM_PTR(t);
}
t->items[0] = MP_OBJ_FROM_PTR(mp_obj_get_type(cur_exc));
t->items[1] = cur_exc;
t->items[2] = mp_const_none;
return MP_OBJ_FROM_PTR(t);
}
MP_DEFINE_CONST_FUN_OBJ_0(mp_sys_exc_info_obj, mp_sys_exc_info);
#endif
#if MICROPY_PY_SYS_GETSIZEOF
STATIC mp_obj_t mp_sys_getsizeof(mp_obj_t obj) {
return mp_unary_op(MP_UNARY_OP_SIZEOF, obj);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mp_sys_getsizeof_obj, mp_sys_getsizeof);
#endif
#if MICROPY_PY_SYS_ATEXIT
// atexit(callback): Callback is called when sys.exit is called.
STATIC mp_obj_t mp_sys_atexit(mp_obj_t obj) {
mp_obj_t old = MP_STATE_VM(sys_exitfunc);
MP_STATE_VM(sys_exitfunc) = obj;
return old;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mp_sys_atexit_obj, mp_sys_atexit);
#endif
#if MICROPY_PY_SYS_SETTRACE
// settrace(tracefunc): Set the system's trace function.
STATIC mp_obj_t mp_sys_settrace(mp_obj_t obj) {
return mp_prof_settrace(obj);
}
MP_DEFINE_CONST_FUN_OBJ_1(mp_sys_settrace_obj, mp_sys_settrace);
#endif // MICROPY_PY_SYS_SETTRACE
#if MICROPY_PY_SYS_PATH && !MICROPY_PY_SYS_ATTR_DELEGATION
#error "MICROPY_PY_SYS_PATH requires MICROPY_PY_SYS_ATTR_DELEGATION"
#endif
#if MICROPY_PY_SYS_PS1_PS2 && !MICROPY_PY_SYS_ATTR_DELEGATION
#error "MICROPY_PY_SYS_PS1_PS2 requires MICROPY_PY_SYS_ATTR_DELEGATION"
#endif
#if MICROPY_PY_SYS_TRACEBACKLIMIT && !MICROPY_PY_SYS_ATTR_DELEGATION
#error "MICROPY_PY_SYS_TRACEBACKLIMIT requires MICROPY_PY_SYS_ATTR_DELEGATION"
#endif
#if MICROPY_PY_SYS_ATTR_DELEGATION && !MICROPY_MODULE_ATTR_DELEGATION
#error "MICROPY_PY_SYS_ATTR_DELEGATION requires MICROPY_MODULE_ATTR_DELEGATION"
#endif
#if MICROPY_PY_SYS_ATTR_DELEGATION
// Must be kept in sync with the enum at the top of mpstate.h.
STATIC const uint16_t sys_mutable_keys[] = {
#if MICROPY_PY_SYS_PATH
// Code should access this (as an mp_obj_t) for use with e.g.
// mp_obj_list_append by using the `mp_sys_path` macro defined in runtime.h.
MP_QSTR_path,
#endif
#if MICROPY_PY_SYS_PS1_PS2
MP_QSTR_ps1,
MP_QSTR_ps2,
#endif
#if MICROPY_PY_SYS_TRACEBACKLIMIT
MP_QSTR_tracebacklimit,
#endif
MP_QSTRnull,
};
void mp_module_sys_attr(mp_obj_t self_in, qstr attr, mp_obj_t *dest) {
MP_STATIC_ASSERT(MP_ARRAY_SIZE(sys_mutable_keys) == MP_SYS_MUTABLE_NUM + 1);
MP_STATIC_ASSERT(MP_ARRAY_SIZE(MP_STATE_VM(sys_mutable)) == MP_SYS_MUTABLE_NUM);
mp_module_generic_attr(attr, dest, sys_mutable_keys, MP_STATE_VM(sys_mutable));
}
#endif
STATIC const mp_rom_map_elem_t mp_module_sys_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_sys) },
#if MICROPY_PY_SYS_ARGV
{ MP_ROM_QSTR(MP_QSTR_argv), MP_ROM_PTR(&MP_STATE_VM(mp_sys_argv_obj)) },
#endif
{ MP_ROM_QSTR(MP_QSTR_version), MP_ROM_PTR(&mp_sys_version_obj) },
{ MP_ROM_QSTR(MP_QSTR_version_info), MP_ROM_PTR(&mp_sys_version_info_obj) },
{ MP_ROM_QSTR(MP_QSTR_implementation), MP_ROM_PTR(&mp_sys_implementation_obj) },
#ifdef MICROPY_PY_SYS_PLATFORM
{ MP_ROM_QSTR(MP_QSTR_platform), MP_ROM_PTR(&mp_sys_platform_obj) },
#endif
#if MP_ENDIANNESS_LITTLE
{ MP_ROM_QSTR(MP_QSTR_byteorder), MP_ROM_QSTR(MP_QSTR_little) },
#else
{ MP_ROM_QSTR(MP_QSTR_byteorder), MP_ROM_QSTR(MP_QSTR_big) },
#endif
#if MICROPY_PY_SYS_MAXSIZE
#if MICROPY_LONGINT_IMPL == MICROPY_LONGINT_IMPL_NONE
// Maximum mp_int_t value is not representable as small int, so we have
// little choice but to use MP_SMALL_INT_MAX. Apps also should be careful
// to not try to compare sys.maxsize to some literal number (as this
// number might not fit in available int size), but instead count number
// of "one" bits in sys.maxsize.
{ MP_ROM_QSTR(MP_QSTR_maxsize), MP_ROM_INT(MP_SMALL_INT_MAX) },
#else
{ MP_ROM_QSTR(MP_QSTR_maxsize), MP_ROM_PTR(&mp_sys_maxsize_obj) },
#endif
#endif
#if MICROPY_PY_SYS_INTERN
{ MP_ROM_QSTR(MP_QSTR_intern), MP_ROM_PTR(&mp_sys_intern_obj) },
#endif
#if MICROPY_PY_SYS_EXIT
{ MP_ROM_QSTR(MP_QSTR_exit), MP_ROM_PTR(&mp_sys_exit_obj) },
#endif
#if MICROPY_PY_SYS_SETTRACE
{ MP_ROM_QSTR(MP_QSTR_settrace), MP_ROM_PTR(&mp_sys_settrace_obj) },
#endif
#if MICROPY_PY_SYS_STDFILES
{ MP_ROM_QSTR(MP_QSTR_stdin), MP_ROM_PTR(&mp_sys_stdin_obj) },
{ MP_ROM_QSTR(MP_QSTR_stdout), MP_ROM_PTR(&mp_sys_stdout_obj) },
{ MP_ROM_QSTR(MP_QSTR_stderr), MP_ROM_PTR(&mp_sys_stderr_obj) },
#endif
#if MICROPY_PY_SYS_MODULES
{ MP_ROM_QSTR(MP_QSTR_modules), MP_ROM_PTR(&MP_STATE_VM(mp_loaded_modules_dict)) },
#endif
#if MICROPY_PY_SYS_EXC_INFO
{ MP_ROM_QSTR(MP_QSTR_exc_info), MP_ROM_PTR(&mp_sys_exc_info_obj) },
#endif
#if MICROPY_PY_SYS_GETSIZEOF
{ MP_ROM_QSTR(MP_QSTR_getsizeof), MP_ROM_PTR(&mp_sys_getsizeof_obj) },
#endif
#if MICROPY_PY_SYS_EXECUTABLE
{ MP_ROM_QSTR(MP_QSTR_executable), MP_ROM_PTR(&mp_sys_executable_obj) },
#endif
/*
* Extensions to CPython
*/
{ MP_ROM_QSTR(MP_QSTR_print_exception), MP_ROM_PTR(&mp_sys_print_exception_obj) },
#if MICROPY_PY_SYS_ATEXIT
{ MP_ROM_QSTR(MP_QSTR_atexit), MP_ROM_PTR(&mp_sys_atexit_obj) },
#endif
};
STATIC MP_DEFINE_CONST_DICT(mp_module_sys_globals, mp_module_sys_globals_table);
const mp_obj_module_t mp_module_sys = {
.base = { &mp_type_module },
.globals = (mp_obj_dict_t *)&mp_module_sys_globals,
};
// Unlike the other CPython-compatible modules, sys is not extensible from the
// filesystem. We rely on it to work so that things like sys.path are always
// available.
MP_REGISTER_MODULE(MP_QSTR_sys, mp_module_sys);
#if MICROPY_PY_SYS_ARGV
// Code should access this (as an mp_obj_t) for use with e.g.
// mp_obj_list_append by using the `mp_sys_argv` macro defined in runtime.h.
MP_REGISTER_ROOT_POINTER(mp_obj_list_t mp_sys_argv_obj);
#endif
#if MICROPY_PY_SYS_EXC_INFO
// current exception being handled, for sys.exc_info()
MP_REGISTER_ROOT_POINTER(mp_obj_base_t * cur_exception);
#endif
#if MICROPY_PY_SYS_ATEXIT
// exposed through sys.atexit function
MP_REGISTER_ROOT_POINTER(mp_obj_t sys_exitfunc);
#endif
#if MICROPY_PY_SYS_ATTR_DELEGATION
// Contains mutable sys attributes.
MP_REGISTER_ROOT_POINTER(mp_obj_t sys_mutable[MP_SYS_MUTABLE_NUM]);
MP_REGISTER_MODULE_DELEGATION(mp_module_sys, mp_module_sys_attr);
#endif
#endif // MICROPY_PY_SYS
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