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9a9ccc7a8c
Micropython did not work because of two problems: - the stack in ascending order on emscripten - if optimized, some variables may be stored in local JavaScript variables, which breaks garbage collection. Change-Id: Ib454e0c4d995e9f5f85370eea758526119b35773
71 lines
2.3 KiB
C
71 lines
2.3 KiB
C
/*
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* This file is part of the Micro Python 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) 2014 Paul Sokolovsky
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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 "py/mpstate.h"
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#include "py/nlr.h"
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#include "py/obj.h"
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#include "py/runtime.h"
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#include "py/stackctrl.h"
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void mp_stack_ctrl_init(void) {
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volatile int stack_dummy;
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MP_STATE_THREAD(stack_top) = (char*)&stack_dummy;
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}
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void mp_stack_set_top(void *top) {
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MP_STATE_THREAD(stack_top) = top;
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}
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mp_uint_t mp_stack_usage(void) {
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/* Micropython's stackctrl.c assumes that the stack is in descending order,
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* which is not always the case for us. */
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volatile int stack_dummy;
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if (MP_STATE_THREAD(stack_top) > (char*)&stack_dummy) {
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return MP_STATE_THREAD(stack_top) - (char*)&stack_dummy;
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} else {
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return (char*)&stack_dummy - MP_STATE_THREAD(stack_top);
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}
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}
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#if MICROPY_STACK_CHECK
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void mp_stack_set_limit(mp_uint_t limit) {
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MP_STATE_THREAD(stack_limit) = limit;
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}
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void mp_exc_recursion_depth(void) {
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nlr_raise(mp_obj_new_exception_arg1(&mp_type_RuntimeError,
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MP_OBJ_NEW_QSTR(MP_QSTR_maximum_space_recursion_space_depth_space_exceeded)));
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}
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void mp_stack_check(void) {
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if (mp_stack_usage() >= MP_STATE_THREAD(stack_limit)) {
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mp_exc_recursion_depth();
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}
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}
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#endif // MICROPY_STACK_CHECK
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