circuitpython/ports/stm32/gccollect.c

77 lines
2.6 KiB
C

/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013, 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 "py/obj.h"
#include "py/gc.h"
#include "py/mpthread.h"
#include "gccollect.h"
#include "systick.h"
uintptr_t gc_helper_get_regs_and_sp(uintptr_t *regs);
void gc_collect(void) {
// get current time, in case we want to time the GC
#if 0
uint32_t start = mp_hal_ticks_us();
#endif
// start the GC
gc_collect_start();
// get the registers and the sp
uintptr_t regs[10];
uintptr_t sp = gc_helper_get_regs_and_sp(regs);
// trace the stack, including the registers (since they live on the stack in this function)
#if MICROPY_PY_THREAD
gc_collect_root((void**)sp, ((uint32_t)MP_STATE_THREAD(stack_top) - sp) / sizeof(uint32_t));
#else
gc_collect_root((void**)sp, ((uint32_t)&_ram_end - sp) / sizeof(uint32_t));
#endif
// trace root pointers from any threads
#if MICROPY_PY_THREAD
mp_thread_gc_others();
#endif
// end the GC
gc_collect_end();
#if 0
// print GC info
uint32_t ticks = mp_hal_ticks_us() - start;
gc_info_t info;
gc_info(&info);
printf("GC@%lu %lums\n", start, ticks);
printf(" " UINT_FMT " total\n", info.total);
printf(" " UINT_FMT " : " UINT_FMT "\n", info.used, info.free);
printf(" 1=" UINT_FMT " 2=" UINT_FMT " m=" UINT_FMT "\n", info.num_1block, info.num_2block, info.max_block);
#endif
}