60 lines
1.9 KiB
C
60 lines
1.9 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/nlr.h"
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#include "py/obj.h"
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#include "py/stackctrl.h"
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// Stack top at the start of program
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char *stack_top;
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void mp_stack_ctrl_init(void) {
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volatile int stack_dummy;
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stack_top = (char*)&stack_dummy;
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}
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mp_uint_t mp_stack_usage(void) {
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// Assumes descending stack
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volatile int stack_dummy;
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return stack_top - (char*)&stack_dummy;
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}
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#if MICROPY_STACK_CHECK
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static mp_uint_t stack_limit = 10240;
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void mp_stack_set_limit(mp_uint_t limit) {
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stack_limit = limit;
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}
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void mp_stack_check(void) {
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if (mp_stack_usage() >= stack_limit) {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_RuntimeError, "maximum recursion depth exceeded"));
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}
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}
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#endif // MICROPY_STACK_CHECK
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