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1 : : /* 2 : : * This file is part of the MicroPython project, http://micropython.org/ 3 : : * 4 : : * The MIT License (MIT) 5 : : * 6 : : * Copyright (c) 2014 Paul Sokolovsky 7 : : * 8 : : * Permission is hereby granted, free of charge, to any person obtaining a copy 9 : : * of this software and associated documentation files (the "Software"), to deal 10 : : * in the Software without restriction, including without limitation the rights 11 : : * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 12 : : * copies of the Software, and to permit persons to whom the Software is 13 : : * furnished to do so, subject to the following conditions: 14 : : * 15 : : * The above copyright notice and this permission notice shall be included in 16 : : * all copies or substantial portions of the Software. 17 : : * 18 : : * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 : : * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20 : : * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 21 : : * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 22 : : * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 23 : : * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 24 : : * THE SOFTWARE. 25 : : */ 26 : : 27 : : #include "py/runtime.h" 28 : : #include "py/stackctrl.h" 29 : : 30 : 3224 : void mp_stack_ctrl_init(void) { 31 : 3224 : volatile int stack_dummy; 32 : 3224 : MP_STATE_THREAD(stack_top) = (char *)&stack_dummy; 33 : 3224 : } 34 : : 35 : 590 : void mp_stack_set_top(void *top) { 36 : 590 : MP_STATE_THREAD(stack_top) = top; 37 : 590 : } 38 : : 39 : 9739666 : mp_uint_t mp_stack_usage(void) { 40 : : // Assumes descending stack 41 : 9739666 : volatile int stack_dummy; 42 : 9739666 : return MP_STATE_THREAD(stack_top) - (char *)&stack_dummy; 43 : : } 44 : : 45 : : #if MICROPY_STACK_CHECK 46 : : 47 : 3813 : void mp_stack_set_limit(mp_uint_t limit) { 48 : 3813 : MP_STATE_THREAD(stack_limit) = limit; 49 : 3813 : } 50 : : 51 : 9642353 : void mp_stack_check(void) { 52 [ + + ]: 9642353 : if (mp_stack_usage() >= MP_STATE_THREAD(stack_limit)) { 53 : 23 : mp_raise_recursion_depth(); 54 : : } 55 : 9922388 : } 56 : : 57 : : #endif // MICROPY_STACK_CHECK