| /* |
| * This file is part of the Micro Python project, http://micropython.org/ |
| * |
| * The MIT License (MIT) |
| * |
| * Copyright (c) 2014 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/mpstate.h" |
| #include "py/nlr.h" |
| #include "py/obj.h" |
| #include "py/runtime.h" |
| #include "py/stackctrl.h" |
| |
| void mp_stack_ctrl_init(void) { |
| volatile int stack_dummy; |
| MP_STATE_VM(stack_top) = (char*)&stack_dummy; |
| } |
| |
| mp_uint_t mp_stack_usage(void) { |
| // Assumes descending stack |
| volatile int stack_dummy; |
| return MP_STATE_VM(stack_top) - (char*)&stack_dummy; |
| } |
| |
| #if MICROPY_STACK_CHECK |
| |
| void mp_stack_set_limit(mp_uint_t limit) { |
| MP_STATE_VM(stack_limit) = limit; |
| } |
| |
| void mp_exc_recursion_depth(void) { |
| nlr_raise(mp_obj_new_exception_arg1(&mp_type_RuntimeError, |
| MP_OBJ_NEW_QSTR(MP_QSTR_maximum_space_recursion_space_depth_space_exceeded))); |
| } |
| |
| void mp_stack_check(void) { |
| if (mp_stack_usage() >= MP_STATE_VM(stack_limit)) { |
| mp_exc_recursion_depth(); |
| } |
| } |
| |
| #endif // MICROPY_STACK_CHECK |