61 lines
2.2 KiB
C
61 lines
2.2 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 Damien P. George
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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 <stdio.h>
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#include "py/gc.h"
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#include "gccollect.h"
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STATIC uint32_t stack_end;
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mp_uint_t gc_helper_get_regs_and_sp(mp_uint_t *regs);
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void gc_collect_init(void) {
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mp_uint_t regs[8];
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mp_uint_t sp = gc_helper_get_regs_and_sp(regs);
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stack_end = sp;
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//printf("stack=%p ram_end=%p %d\n", stack_end, &_ram_end);
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}
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void gc_collect(void) {
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// start the GC
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gc_collect_start();
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// We need to scan everything in RAM that can hold a pointer.
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// The data segment is used, but should not contain pointers, so we just scan the bss.
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gc_collect_root((void**)&_bss_start, ((uint32_t)&_bss_end - (uint32_t)&_bss_start) / sizeof(uint32_t));
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// get the registers and the sp
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mp_uint_t regs[8];
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mp_uint_t sp = gc_helper_get_regs_and_sp(regs);
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// trace the stack, including the registers (since they live on the stack in this function)
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gc_collect_root((void**)sp, (stack_end - sp) / sizeof(uint32_t));
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// end the GC
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gc_collect_end();
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}
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