Paul Sokolovsky | 2366869 | 2014-06-25 03:03:34 +0300 | [diff] [blame] | 1 | /* |
Alexander Steffen | 55f3324 | 2017-06-30 09:22:17 +0200 | [diff] [blame] | 2 | * This file is part of the MicroPython project, http://micropython.org/ |
Paul Sokolovsky | 2366869 | 2014-06-25 03:03:34 +0300 | [diff] [blame] | 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 | |
Paul Sokolovsky | 7f1c981 | 2015-03-28 01:14:45 +0200 | [diff] [blame] | 27 | #include "py/runtime.h" |
Damien George | 51dfcb4 | 2015-01-01 20:27:54 +0000 | [diff] [blame] | 28 | #include "py/stackctrl.h" |
Paul Sokolovsky | 2366869 | 2014-06-25 03:03:34 +0300 | [diff] [blame] | 29 | |
Damien George | b4fe6e2 | 2014-12-10 18:05:42 +0000 | [diff] [blame] | 30 | void mp_stack_ctrl_init(void) { |
Paul Sokolovsky | 2366869 | 2014-06-25 03:03:34 +0300 | [diff] [blame] | 31 | volatile int stack_dummy; |
Damien George | 69661f3 | 2020-02-27 15:36:53 +1100 | [diff] [blame^] | 32 | MP_STATE_THREAD(stack_top) = (char *)&stack_dummy; |
Paul Sokolovsky | 2366869 | 2014-06-25 03:03:34 +0300 | [diff] [blame] | 33 | } |
| 34 | |
Paul Sokolovsky | 1d5d4f4 | 2016-02-13 15:43:28 +0200 | [diff] [blame] | 35 | void mp_stack_set_top(void *top) { |
Damien George | 330165a | 2016-04-22 22:44:56 +0000 | [diff] [blame] | 36 | MP_STATE_THREAD(stack_top) = top; |
Paul Sokolovsky | 1d5d4f4 | 2016-02-13 15:43:28 +0200 | [diff] [blame] | 37 | } |
| 38 | |
Damien George | b4fe6e2 | 2014-12-10 18:05:42 +0000 | [diff] [blame] | 39 | mp_uint_t mp_stack_usage(void) { |
Paul Sokolovsky | 2366869 | 2014-06-25 03:03:34 +0300 | [diff] [blame] | 40 | // Assumes descending stack |
| 41 | volatile int stack_dummy; |
Damien George | 69661f3 | 2020-02-27 15:36:53 +1100 | [diff] [blame^] | 42 | return MP_STATE_THREAD(stack_top) - (char *)&stack_dummy; |
Paul Sokolovsky | 2366869 | 2014-06-25 03:03:34 +0300 | [diff] [blame] | 43 | } |
| 44 | |
| 45 | #if MICROPY_STACK_CHECK |
| 46 | |
Damien George | 4abff75 | 2014-08-30 14:59:21 +0100 | [diff] [blame] | 47 | void mp_stack_set_limit(mp_uint_t limit) { |
Damien George | 330165a | 2016-04-22 22:44:56 +0000 | [diff] [blame] | 48 | MP_STATE_THREAD(stack_limit) = limit; |
Paul Sokolovsky | 2366869 | 2014-06-25 03:03:34 +0300 | [diff] [blame] | 49 | } |
| 50 | |
Damien George | b4fe6e2 | 2014-12-10 18:05:42 +0000 | [diff] [blame] | 51 | void mp_stack_check(void) { |
Damien George | 330165a | 2016-04-22 22:44:56 +0000 | [diff] [blame] | 52 | if (mp_stack_usage() >= MP_STATE_THREAD(stack_limit)) { |
Damien George | 5b8998d | 2017-11-20 17:29:58 +1100 | [diff] [blame] | 53 | mp_raise_recursion_depth(); |
Paul Sokolovsky | 2366869 | 2014-06-25 03:03:34 +0300 | [diff] [blame] | 54 | } |
| 55 | } |
| 56 | |
| 57 | #endif // MICROPY_STACK_CHECK |