kopia lustrzana https://github.com/micropython/micropython
66 wiersze
2.3 KiB
C
66 wiersze
2.3 KiB
C
|
/*
|
||
|
|
* This file is part of the Micro Python project, http://micropython.org/
|
||
|
|
*
|
||
|
|
* The MIT License (MIT)
|
||
|
|
*
|
||
|
|
* Copyright (c) 2014 Damien P. George
|
||
|
|
*
|
||
|
|
* 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 <stdio.h>
|
||
|
|
#include <stdint.h>
|
||
|
|
|
||
|
|
#include "mpconfig.h"
|
||
|
|
#include "misc.h"
|
||
|
|
#include "qstr.h"
|
||
|
|
#include "obj.h"
|
||
|
|
#include "gc.h"
|
||
|
|
#include "gccollect.h"
|
||
|
|
|
||
|
|
STATIC uint32_t stack_end;
|
||
|
|
|
||
|
|
mp_uint_t gc_helper_get_regs_and_sp(mp_uint_t *regs);
|
||
|
|
|
||
|
|
void gc_collect_init(void) {
|
||
|
|
mp_uint_t regs[8];
|
||
|
|
mp_uint_t sp = gc_helper_get_regs_and_sp(regs);
|
||
|
|
stack_end = sp;
|
||
|
|
//printf("stack=%p ram_end=%p %d\n", stack_end, &_ram_end);
|
||
|
|
}
|
||
|
|
|
||
|
|
void gc_collect(void) {
|
||
|
|
// start the GC
|
||
|
|
gc_collect_start();
|
||
|
|
|
||
|
|
// We need to scan everything in RAM that can hold a pointer.
|
||
|
|
// The data segment is used, but should not contain pointers, so we just scan the bss.
|
||
|
|
gc_collect_root((void**)&_bss_start, ((uint32_t)&_bss_end - (uint32_t)&_bss_start) / sizeof(uint32_t));
|
||
|
|
|
||
|
|
// get the registers and the sp
|
||
|
|
mp_uint_t regs[8];
|
||
|
|
mp_uint_t sp = gc_helper_get_regs_and_sp(regs);
|
||
|
|
|
||
|
|
// trace the stack, including the registers (since they live on the stack in this function)
|
||
|
|
gc_collect_root((void**)sp, (stack_end - sp) / sizeof(uint32_t));
|
||
|
|
|
||
|
|
// end the GC
|
||
|
|
gc_collect_end();
|
||
|
|
}
|